UPDATE: Skeleton for the garbage collector

2024-03-09 14:32:54 +01:00
143 changed files with 3486 additions and 6609 deletions
--- a/.github/workflows/publish-wiki.yml
+++ b/.github/workflows/publish-wiki.yml
@@ -1,18 +0,0 @@
-name: Publish wiki
-on:
-  push:
-    branches: [main]
-    paths:
-      - wiki/**
-      - .github/workflows/publish-wiki.yml
-concurrency:
-  group: publish-wiki
-  cancel-in-progress: true
-permissions:
-  contents: write
-jobs:
-  publish-wiki:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: Andrew-Chen-Wang/github-wiki-action@v4
--- a/.github/workflows/rust-build-test.yaml
+++ b/.github/workflows/rust-build-test.yaml
@@ -16,9 +16,6 @@ jobs:
        steps:
            - uses: actions/checkout@v3

-            - name: Install wasm-pack
-              run: curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh
-
            - name: Build
              run: cargo build --release --verbose

--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1 @@
-target/*
-.DS_Store
+target/*
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -8,22 +8,11 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"

-[[package]]
-name = "aes"
-version = "0.8.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b169f7a6d4742236a0a00c541b845991d0ac43e546831af1249753ab4c3aa3a0"
-dependencies = [
- "cfg-if",
- "cipher",
- "cpufeatures",
-]
-
 [[package]]
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-version = "1.1.3"
+version = "1.1.2"
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-checksum = "8e60d3430d3a69478ad0993f19238d2df97c507009a52b3c10addcd7f6bcb916"
+checksum = "b2969dcb958b36655471fc61f7e416fa76033bdd4bfed0678d8fee1e2d07a1f0"
 dependencies = [
 "memchr",
 ]
@@ -45,57 +34,15 @@ dependencies = [

 [[package]]
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-version = "1.2.0"
+version = "1.1.0"
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-checksum = "3078c7629b62d3f0439517fa394996acacc5cbc91c5a20d8c658e77abd503a71"
-dependencies = [
- "generic-array",
-]
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 [[package]]
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-checksum = "7ff69b9dd49fd426c69a0db9fc04dd934cdb6645ff000864d98f7e2af8830eaa"
-
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-checksum = "5d6d68c57235a3a081186990eca2867354726650f42f7516ca50c28d6281fd15"
+checksum = "7f30e7476521f6f8af1a1c4c0b8cc94f0bee37d91763d0ca2665f299b6cd8aec"

 [[package]]
 name = "byteorder"
@@ -126,11 +73,10 @@ dependencies = [

 [[package]]
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+version = "1.0.83"
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-checksum = "8cd6604a82acf3039f1144f54b8eb34e91ffba622051189e71b781822d5ee1f5"
+checksum = "f1174fb0b6ec23863f8b971027804a42614e347eafb0a95bf0b12cdae21fc4d0"
 dependencies = [
- "jobserver",
 "libc",
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@@ -142,9 +88,9 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"

 [[package]]
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-version = "0.4.37"
+version = "0.4.31"
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-checksum = "8a0d04d43504c61aa6c7531f1871dd0d418d91130162063b789da00fd7057a5e"
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@@ -156,9 +102,9 @@ dependencies = [

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@@ -167,106 +113,35 @@ dependencies = [

 [[package]]
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-dependencies = [
- "libc",
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+checksum = "e496a50fda8aacccc86d7529e2c1e0892dbd0f898a6b5645b5561b89c3210efa"

 [[package]]
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 [[package]]
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@@ -278,41 +153,22 @@ dependencies = [
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-[[package]]
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 "libc",
- "wasi",
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-checksum = "6c49c37c09c17a53d937dfbb742eb3a961d65a994e6bcdcf37e7399d0cc8ab5e"
-dependencies = [
- "digest",
+ "wasi 0.11.0+wasi-snapshot-preview1",
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 [[package]]
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@@ -331,20 +187,10 @@ dependencies = [
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-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
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@@ -358,9 +204,8 @@ dependencies = [

 [[package]]
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+version = "0.1.2"
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- "bitcode",
 "chrono",
 "chrono-tz",
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@@ -370,88 +215,74 @@ dependencies = [
 "ryu",
 "serde",
 "serde_json",
+ "serde_repr",
 ]

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@@ -462,29 +293,6 @@ dependencies = [
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@@ -525,15 +333,9 @@ dependencies = [

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@@ -543,18 +345,18 @@ checksum = "5b40af805b3121feab8a3c29f04d8ad262fa8e0561883e7653e024ae4479e6de"

 [[package]]
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@@ -591,9 +393,9 @@ dependencies = [

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@@ -603,9 +405,9 @@ dependencies = [

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@@ -614,53 +416,39 @@ dependencies = [

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+checksum = "c08c74e62047bb2de4ff487b251e4a92e24f48745648451635cec7d591162d9f"

 [[package]]
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+checksum = "dbf7d7b1ea646d380d0e8153158063a6da7efe30ddbf3184042848e3f8a6f671"
+dependencies = [
+ "xmlparser",
+]

 [[package]]
 name = "ryu"
-version = "1.0.17"
+version = "1.0.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
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-checksum = "e1cf6437eb19a8f4a6cc0f7dca544973b0b78843adbfeb3683d1a94a0024a294"
+checksum = "1ad4cc8da4ef723ed60bced201181d83791ad433213d8c24efffda1eec85d741"

 [[package]]
 name = "serde"
-version = "1.0.197"
+version = "1.0.192"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3fb1c873e1b9b056a4dc4c0c198b24c3ffa059243875552b2bd0933b1aee4ce2"
+checksum = "bca2a08484b285dcb282d0f67b26cadc0df8b19f8c12502c13d966bf9482f001"
 dependencies = [
 "serde_derive",
 ]

-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e3b4c031cd0d9014307d82b8abf653c0290fbdaeb4c02d00c63cf52f728628bf"
-dependencies = [
- "js-sys",
- "serde",
- "wasm-bindgen",
-]
-
 [[package]]
 name = "serde_derive"
-version = "1.0.197"
+version = "1.0.192"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7eb0b34b42edc17f6b7cac84a52a1c5f0e1bb2227e997ca9011ea3dd34e8610b"
+checksum = "d6c7207fbec9faa48073f3e3074cbe553af6ea512d7c21ba46e434e70ea9fbc1"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -669,9 +457,9 @@ dependencies = [

 [[package]]
 name = "serde_json"
-version = "1.0.115"
+version = "1.0.108"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "12dc5c46daa8e9fdf4f5e71b6cf9a53f2487da0e86e55808e2d35539666497dd"
+checksum = "3d1c7e3eac408d115102c4c24ad393e0821bb3a5df4d506a80f85f7a742a526b"
 dependencies = [
 "itoa",
 "ryu",
@@ -679,25 +467,14 @@ dependencies = [
 ]

 [[package]]
-name = "sha1"
-version = "0.10.6"
+name = "serde_repr"
+version = "0.1.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e3bf829a2d51ab4a5ddf1352d8470c140cadc8301b2ae1789db023f01cedd6ba"
+checksum = "3081f5ffbb02284dda55132aa26daecedd7372a42417bbbab6f14ab7d6bb9145"
 dependencies = [
- "cfg-if",
- "cpufeatures",
- "digest",
-]
-
-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "793db75ad2bcafc3ffa7c68b215fee268f537982cd901d132f89c6343f3a3dc8"
-dependencies = [
- "cfg-if",
- "cpufeatures",
- "digest",
+ "proc-macro2",
+ "quote",
+ "syn",
 ]

 [[package]]
@@ -706,17 +483,11 @@ version = "0.3.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "38b58827f4464d87d377d175e90bf58eb00fd8716ff0a62f80356b5e61555d0d"

-[[package]]
-name = "subtle"
-version = "2.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "81cdd64d312baedb58e21336b31bc043b77e01cc99033ce76ef539f78e965ebc"
-
 [[package]]
 name = "syn"
-version = "2.0.58"
+version = "2.0.39"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "44cfb93f38070beee36b3fef7d4f5a16f27751d94b187b666a5cc5e9b0d30687"
+checksum = "23e78b90f2fcf45d3e842032ce32e3f2d1545ba6636271dcbf24fa306d87be7a"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -725,18 +496,18 @@ dependencies = [

 [[package]]
 name = "thiserror"
-version = "1.0.58"
+version = "1.0.50"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "03468839009160513471e86a034bb2c5c0e4baae3b43f79ffc55c4a5427b3297"
+checksum = "f9a7210f5c9a7156bb50aa36aed4c95afb51df0df00713949448cf9e97d382d2"
 dependencies = [
 "thiserror-impl",
 ]

 [[package]]
 name = "thiserror-impl"
-version = "1.0.58"
+version = "1.0.50"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c61f3ba182994efc43764a46c018c347bc492c79f024e705f46567b418f6d4f7"
+checksum = "266b2e40bc00e5a6c09c3584011e08b06f123c00362c92b975ba9843aaaa14b8"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -745,29 +516,15 @@ dependencies = [

 [[package]]
 name = "time"
-version = "0.3.34"
+version = "0.1.45"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c8248b6521bb14bc45b4067159b9b6ad792e2d6d754d6c41fb50e29fefe38749"
+checksum = "1b797afad3f312d1c66a56d11d0316f916356d11bd158fbc6ca6389ff6bf805a"
 dependencies = [
- "deranged",
- "num-conv",
- "powerfmt",
- "serde",
- "time-core",
+ "libc",
+ "wasi 0.10.0+wasi-snapshot-preview1",
+ "winapi",
 ]

-[[package]]
-name = "time-core"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ef927ca75afb808a4d64dd374f00a2adf8d0fcff8e7b184af886c3c87ec4a3f3"
-
-[[package]]
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-checksum = "42ff0bf0c66b8238c6f3b578df37d0b7848e55df8577b3f74f92a69acceeb825"
-
 [[package]]
 name = "unicode-ident"
 version = "1.0.12"
@@ -776,19 +533,19 @@ checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"

 [[package]]
 name = "uuid"
-version = "1.8.0"
+version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a183cf7feeba97b4dd1c0d46788634f6221d87fa961b305bed08c851829efcc0"
+checksum = "88ad59a7560b41a70d191093a945f0b87bc1deeda46fb237479708a1d6b6cdfc"
 dependencies = [
 "getrandom",
 "serde",
 ]

 [[package]]
-name = "version_check"
-version = "0.9.4"
+name = "wasi"
+version = "0.10.0+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
+checksum = "1a143597ca7c7793eff794def352d41792a93c481eb1042423ff7ff72ba2c31f"

 [[package]]
 name = "wasi"
@@ -796,22 +553,11 @@ version = "0.11.0+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"

-[[package]]
-name = "wasm"
-version = "0.1.3"
-dependencies = [
- "ironcalc_base",
- "serde",
- "serde-wasm-bindgen",
- "wasm-bindgen",
- "wasm-bindgen-test",
-]
-
 [[package]]
 name = "wasm-bindgen"
-version = "0.2.92"
+version = "0.2.88"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4be2531df63900aeb2bca0daaaddec08491ee64ceecbee5076636a3b026795a8"
+checksum = "7daec296f25a1bae309c0cd5c29c4b260e510e6d813c286b19eaadf409d40fce"
 dependencies = [
 "cfg-if",
 "wasm-bindgen-macro",
@@ -819,9 +565,9 @@ dependencies = [

 [[package]]
 name = "wasm-bindgen-backend"
-version = "0.2.92"
+version = "0.2.88"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "614d787b966d3989fa7bb98a654e369c762374fd3213d212cfc0251257e747da"
+checksum = "e397f4664c0e4e428e8313a469aaa58310d302159845980fd23b0f22a847f217"
 dependencies = [
 "bumpalo",
 "log",
@@ -832,23 +578,11 @@ dependencies = [
 "wasm-bindgen-shared",
 ]

-[[package]]
-name = "wasm-bindgen-futures"
-version = "0.4.42"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "76bc14366121efc8dbb487ab05bcc9d346b3b5ec0eaa76e46594cabbe51762c0"
-dependencies = [
- "cfg-if",
- "js-sys",
- "wasm-bindgen",
- "web-sys",
-]
-
 [[package]]
 name = "wasm-bindgen-macro"
-version = "0.2.92"
+version = "0.2.88"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a1f8823de937b71b9460c0c34e25f3da88250760bec0ebac694b49997550d726"
+checksum = "5961017b3b08ad5f3fe39f1e79877f8ee7c23c5e5fd5eb80de95abc41f1f16b2"
 dependencies = [
 "quote",
 "wasm-bindgen-macro-support",
@@ -856,9 +590,9 @@ dependencies = [

 [[package]]
 name = "wasm-bindgen-macro-support"
-version = "0.2.92"
+version = "0.2.88"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e94f17b526d0a461a191c78ea52bbce64071ed5c04c9ffe424dcb38f74171bb7"
+checksum = "c5353b8dab669f5e10f5bd76df26a9360c748f054f862ff5f3f8aae0c7fb3907"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -869,59 +603,46 @@ dependencies = [

 [[package]]
 name = "wasm-bindgen-shared"
-version = "0.2.92"
+version = "0.2.88"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "af190c94f2773fdb3729c55b007a722abb5384da03bc0986df4c289bf5567e96"
+checksum = "0d046c5d029ba91a1ed14da14dca44b68bf2f124cfbaf741c54151fdb3e0750b"

 [[package]]
-name = "wasm-bindgen-test"
-version = "0.3.42"
+name = "winapi"
+version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d9bf62a58e0780af3e852044583deee40983e5886da43a271dd772379987667b"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
 dependencies = [
- "console_error_panic_hook",
- "js-sys",
- "scoped-tls",
- "wasm-bindgen",
- "wasm-bindgen-futures",
- "wasm-bindgen-test-macro",
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
 ]

 [[package]]
-name = "wasm-bindgen-test-macro"
-version = "0.3.42"
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b7f89739351a2e03cb94beb799d47fb2cac01759b40ec441f7de39b00cbf7ef0"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
-]
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"

 [[package]]
-name = "web-sys"
-version = "0.3.69"
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "77afa9a11836342370f4817622a2f0f418b134426d91a82dfb48f532d2ec13ef"
-dependencies = [
- "js-sys",
- "wasm-bindgen",
-]
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"

 [[package]]
 name = "windows-core"
-version = "0.52.0"
+version = "0.51.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "33ab640c8d7e35bf8ba19b884ba838ceb4fba93a4e8c65a9059d08afcfc683d9"
+checksum = "f1f8cf84f35d2db49a46868f947758c7a1138116f7fac3bc844f43ade1292e64"
 dependencies = [
 "windows-targets",
 ]

 [[package]]
 name = "windows-targets"
-version = "0.52.4"
+version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7dd37b7e5ab9018759f893a1952c9420d060016fc19a472b4bb20d1bdd694d1b"
+checksum = "9a2fa6e2155d7247be68c096456083145c183cbbbc2764150dda45a87197940c"
 dependencies = [
 "windows_aarch64_gnullvm",
 "windows_aarch64_msvc",
@@ -934,91 +655,62 @@ dependencies = [

 [[package]]
 name = "windows_aarch64_gnullvm"
-version = "0.52.4"
+version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bcf46cf4c365c6f2d1cc93ce535f2c8b244591df96ceee75d8e83deb70a9cac9"
+checksum = "2b38e32f0abccf9987a4e3079dfb67dcd799fb61361e53e2882c3cbaf0d905d8"

 [[package]]
 name = "windows_aarch64_msvc"
-version = "0.52.4"
+version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "da9f259dd3bcf6990b55bffd094c4f7235817ba4ceebde8e6d11cd0c5633b675"
+checksum = "dc35310971f3b2dbbf3f0690a219f40e2d9afcf64f9ab7cc1be722937c26b4bc"

 [[package]]
 name = "windows_i686_gnu"
-version = "0.52.4"
+version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b474d8268f99e0995f25b9f095bc7434632601028cf86590aea5c8a5cb7801d3"
+checksum = "a75915e7def60c94dcef72200b9a8e58e5091744960da64ec734a6c6e9b3743e"

 [[package]]
 name = "windows_i686_msvc"
-version = "0.52.4"
+version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1515e9a29e5bed743cb4415a9ecf5dfca648ce85ee42e15873c3cd8610ff8e02"
+checksum = "8f55c233f70c4b27f66c523580f78f1004e8b5a8b659e05a4eb49d4166cca406"

 [[package]]
 name = "windows_x86_64_gnu"
-version = "0.52.4"
+version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5eee091590e89cc02ad514ffe3ead9eb6b660aedca2183455434b93546371a03"
+checksum = "53d40abd2583d23e4718fddf1ebec84dbff8381c07cae67ff7768bbf19c6718e"

 [[package]]
 name = "windows_x86_64_gnullvm"
-version = "0.52.4"
+version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "77ca79f2451b49fa9e2af39f0747fe999fcda4f5e241b2898624dca97a1f2177"
+checksum = "0b7b52767868a23d5bab768e390dc5f5c55825b6d30b86c844ff2dc7414044cc"

 [[package]]
 name = "windows_x86_64_msvc"
-version = "0.52.4"
+version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "32b752e52a2da0ddfbdbcc6fceadfeede4c939ed16d13e648833a61dfb611ed8"
+checksum = "ed94fce61571a4006852b7389a063ab983c02eb1bb37b47f8272ce92d06d9538"
+
+[[package]]
+name = "xmlparser"
+version = "0.13.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "66fee0b777b0f5ac1c69bb06d361268faafa61cd4682ae064a171c16c433e9e4"

 [[package]]
 name = "zip"
-version = "0.6.6"
+version = "0.5.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "760394e246e4c28189f19d488c058bf16f564016aefac5d32bb1f3b51d5e9261"
+checksum = "93ab48844d61251bb3835145c521d88aa4031d7139e8485990f60ca911fa0815"
 dependencies = [
- "aes",
 "byteorder",
 "bzip2",
- "constant_time_eq",
 "crc32fast",
- "crossbeam-utils",
 "flate2",
- "hmac",
- "pbkdf2",
- "sha1",
+ "thiserror",
 "time",
- "zstd",
-]
-
-[[package]]
-name = "zstd"
-version = "0.11.2+zstd.1.5.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "20cc960326ece64f010d2d2107537f26dc589a6573a316bd5b1dba685fa5fde4"
-dependencies = [
- "zstd-safe",
-]
-
-[[package]]
-name = "zstd-safe"
-version = "5.0.2+zstd.1.5.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1d2a5585e04f9eea4b2a3d1eca508c4dee9592a89ef6f450c11719da0726f4db"
-dependencies = [
- "libc",
- "zstd-sys",
-]
-
-[[package]]
-name = "zstd-sys"
-version = "2.0.10+zstd.1.5.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c253a4914af5bafc8fa8c86ee400827e83cf6ec01195ec1f1ed8441bf00d65aa"
-dependencies = [
- "cc",
- "pkg-config",
 ]
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,7 +4,6 @@ resolver = "2"
 members = [
  "base",
  "xlsx",
-  "bindings/wasm",
 ]

 exclude = [
--- a/14
+++ b/14
@@ -7,18 +7,14 @@ format:

 tests: lint
 	cargo test
-	./target/debug/documentation
-	cmp functions.md wiki/functions.md || exit 1
-	make remove-artifacts
-	cd bindings/wasm/ && wasm-pack build --target nodejs && node tests/test.mjs
+	make remove-xlsx

-remove-artifacts:
+remove-xlsx:
 	rm -f xlsx/hello-calc.xlsx
 	rm -f xlsx/hello-styles.xlsx
 	rm -f xlsx/widths-and-heights.xlsx
-	rm -f functions.md

-clean: remove-artifacts
+clean: remove-xlsx
 	cargo clean
 	rm -r -f base/target
 	rm -r -f xlsx/target
@@ -31,10 +27,6 @@ coverage:
 	CARGO_INCREMENTAL=0 RUSTFLAGS='-C instrument-coverage' LLVM_PROFILE_FILE='cargo-test-%p-%m.profraw' cargo test
 	grcov . --binary-path ./target/debug/deps/ -s . -t html --branch --ignore-not-existing --ignore '../*' --ignore "/*" -o target/coverage/html

-update-docs:
-	cargo build
-	./target/debug/documentation -o wiki/functions.md
-
 docs:
 	cargo doc --no-deps

--- a/README.md
+++ b/README.md
@@ -117,7 +117,55 @@ See more examples in the `examples` folder of the xlsx crate.

 # ROADMAP

-See https://github.com/ironcalc
+> [!WARNING]  
+> This is work-in-progress. IronCalc in developed in the open. Expect things to be broken and change quickly until version 0.5
+
+Major milestones:
+
+* MVP, version 0.5.0: We intend to have a working version by mid March 2024 (version 0.5, MVP)
+* Stable, version 1.0.0 will come later in December 2024
+
+MVP stands for _Minimum Viable Product_
+
+## Version 0.5 or MVP (early 2024)
+
+Version 0.5 includes the engine, javascript and nodejs bindings and a web application
+
+Features of the engine include:
+
+* Read and write xlsx files
+* API to set and read values from cells
+* Implemented 192 Excel functions
+* Time functions with timezones
+* Prepared for i18n but will only support English
+* Wide test coverage
+
+UI features of the web application (backed by the engine):
+
+* Enter values and formulas. Browse mode
+* Italics, bold, underline, horizontal alignment
+* Number formatting
+* Add/remove/rename sheets
+* Copy/Paste extend values
+* Keyboard navigation
+* Delete/Add rows and columns
+* Resize rows and columns
+* Correct scrolling and navigation
+
+## Version 1.0 or Stable (December 2024)
+
+Minor milestones in the ROADMAD for version 1.0.0 (engine and UI):
+
+* Implementation of arrays and array formulas
+* Formula documentation and context help
+* Merge cells
+* Pivot tables
+* Define name manager (mostly UI)
+* Update main evaluation algorithm with a support graph
+* Dynamic arrays (SORT, UNIQUE, ..)
+* Full i18n support with different locales and languages
+* Python bindings
+* Full test coverage

 # Early testing

@@ -144,4 +192,4 @@ Licensed under either of
 * [MIT license](LICENSE-MIT)
 * [Apache license, version 2.0](LICENSE-Apache-2.0)

-at your option.
+at your option.
--- a/assets/android-chrome-192x192.png
+++ b/assets/android-chrome-192x192.png
--- a/assets/android-chrome-512x512.png
+++ b/assets/android-chrome-512x512.png
--- a/assets/apple-touch-icon.png
+++ b/assets/apple-touch-icon.png
--- a/assets/favicon-16x16.png
+++ b/assets/favicon-16x16.png
--- a/assets/favicon-32x32.png
+++ b/assets/favicon-32x32.png
--- a/assets/favicon.ico
+++ b/assets/favicon.ico
--- a/assets/icon/ironcalc_icon.png
+++ b/assets/icon/ironcalc_icon.png
--- a/assets/icon/ironcalc_icon.svg
+++ b/assets/icon/ironcalc_icon.svg
@@ -1,8 +0,0 @@
-<svg width="600" height="600" viewBox="0 0 600 600" fill="none" xmlns="http://www.w3.org/2000/svg">
-<rect width="600" height="600" rx="20" fill="#F2994A"/>
-<path opacity="0.8" fill-rule="evenodd" clip-rule="evenodd" d="M348.98 100C348.98 166.034 322.748 229.362 276.055 276.055C268.163 283.947 259.796 291.255 251.021 297.95L251.021 500L348.98 500H251.021C251.021 433.966 277.252 370.637 323.945 323.945C331.837 316.053 340.204 308.745 348.98 302.05L348.98 100Z" fill="white"/>
-<path opacity="0.8" fill-rule="evenodd" clip-rule="evenodd" d="M251.021 100.068C251.003 140.096 235.094 178.481 206.788 206.787C178.466 235.109 140.053 251.02 100 251.02V348.979C154.873 348.979 207.877 330.866 251.021 297.95V100.068Z" fill="white"/>
-<path opacity="0.8" fill-rule="evenodd" clip-rule="evenodd" d="M348.98 499.882C349.011 459.872 364.918 421.507 393.213 393.213C421.534 364.891 459.947 348.98 500 348.98V251.02C445.128 251.02 392.123 269.134 348.98 302.05V499.882Z" fill="white"/>
-<path fill-rule="evenodd" clip-rule="evenodd" d="M276.055 276.055C322.748 229.362 348.98 166.034 348.98 100H251.021V297.95C259.796 291.255 268.163 283.947 276.055 276.055Z" fill="white"/>
-<path fill-rule="evenodd" clip-rule="evenodd" d="M348.98 302.05V499.895C348.98 499.93 348.98 499.965 348.98 500L251.021 500C251.021 499.946 251.02 499.891 251.021 499.837C251.064 433.862 277.291 370.599 323.945 323.945C331.837 316.053 340.204 308.745 348.98 302.05Z" fill="white"/>
-</svg>
--- a/assets/logo.png
+++ b/assets/logo.png
--- a/assets/logo/png/black.png
+++ b/assets/logo/png/black.png
--- a/assets/logo/png/orange+black.png
+++ b/assets/logo/png/orange+black.png
--- a/assets/logo/png/orange+white.png
+++ b/assets/logo/png/orange+white.png
--- a/assets/logo/png/white.png
+++ b/assets/logo/png/white.png
--- a/assets/logo/svg/black.svg
+++ b/assets/logo/svg/black.svg
--- a/assets/logo/svg/orange+black.svg
+++ b/assets/logo/svg/orange+black.svg
--- a/assets/logo/svg/orange+white.svg
+++ b/assets/logo/svg/orange+white.svg
--- a/assets/logo/svg/white.svg
+++ b/assets/logo/svg/white.svg
--- a/base/Cargo.toml
+++ b/base/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "ironcalc_base"
-version = "0.1.3"
+version = "0.1.2"
 authors = ["Nicolás Hatcher <nicolas@theuniverse.today>"]
 edition = "2021"
 homepage = "https://www.ironcalc.com"
@@ -12,20 +12,18 @@ readme = "README.md"

 [dependencies]
 serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+serde_repr = "0.1"
 ryu = "1.0"
 chrono = "0.4"
-chrono-tz = "0.9"
+chrono-tz = "0.7.0"
 regex = "1.0"
 once_cell = "1.16.0"
-bitcode = "0.6.0"
-
-[dev-dependencies]
-serde_json = "1.0"

 [target.'cfg(target_arch = "wasm32")'.dependencies]
-js-sys = { version = "0.3.69" }
+js-sys = { version = "0.3.60" }

 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
-rand = "0.8.5"
+rand = "0.8.4"


--- a/base/examples/formulas_and_errors.rs
+++ b/base/examples/formulas_and_errors.rs
@@ -1,4 +1,4 @@
-use ironcalc_base::{types::CellType, Model};
+use ironcalc_base::{model::Model, types::CellType};

 fn main() -> Result<(), Box<dyn std::error::Error>> {
    let mut model = Model::new_empty("formulas-and-errors", "en", "UTC")?;
--- a/base/examples/hello_world.rs
+++ b/base/examples/hello_world.rs
@@ -1,4 +1,4 @@
-use ironcalc_base::{cell::CellValue, Model};
+use ironcalc_base::{cell::CellValue, model::Model};

 fn main() -> Result<(), Box<dyn std::error::Error>> {
    let mut model = Model::new_empty("hello-world", "en", "UTC")?;
--- a/base/src/actions.rs
+++ b/base/src/actions.rs
@@ -69,26 +69,21 @@ impl Model {
        target_row: i32,
        target_column: i32,
    ) -> Result<(), String> {
-        if let Some(source_cell) = self
+        let source_cell = self
            .workbook
            .worksheet(sheet)?
            .cell(source_row, source_column)
-        {
-            let style = source_cell.get_style();
-            // FIXME: we need some user_input getter instead of get_text
-            let formula_or_value = self
-                .get_cell_formula(sheet, source_row, source_column)?
-                .unwrap_or_else(|| {
-                    source_cell.get_text(&self.workbook.shared_strings, &self.language)
-                });
-            self.set_user_input(sheet, target_row, target_column, formula_or_value);
-            self.workbook
-                .worksheet_mut(sheet)?
-                .set_cell_style(target_row, target_column, style);
-            self.cell_clear_all(sheet, source_row, source_column)?;
-        } else {
-            self.cell_clear_all(sheet, target_row, target_column)?;
-        }
+            .ok_or("Expected Cell to exist")?;
+        let style = source_cell.get_style();
+        // FIXME: we need some user_input getter instead of get_text
+        let formula_or_value = self
+            .cell_formula(sheet, source_row, source_column)?
+            .unwrap_or_else(|| source_cell.get_text(&self.workbook.shared_strings, &self.language));
+        self.set_user_input(sheet, target_row, target_column, formula_or_value);
+        self.workbook
+            .worksheet_mut(sheet)?
+            .set_cell_style(target_row, target_column, style);
+        self.delete_cell(sheet, source_row, source_column)?;
        Ok(())
    }

@@ -111,7 +106,7 @@ impl Model {
            return Err("Cannot add a negative number of cells :)".to_string());
        }
        // check if it is possible:
-        let dimensions = self.workbook.worksheet(sheet)?.get_dimension();
+        let dimensions = self.workbook.worksheet(sheet)?.dimension();
        let last_column = dimensions.max_column + column_count;
        if last_column > LAST_COLUMN {
            return Err(
@@ -162,11 +157,6 @@ impl Model {
            return Err("Please use insert columns instead".to_string());
        }

-        // first column being deleted
-        let column_start = column;
-        // last column being deleted
-        let column_end = column + column_count - 1;
-
        // Move cells
        let worksheet = &self.workbook.worksheet(sheet)?;
        let mut all_rows: Vec<i32> = worksheet.sheet_data.keys().copied().collect();
@@ -176,11 +166,11 @@ impl Model {
        for r in all_rows {
            let columns: Vec<i32> = self.get_columns_for_row(sheet, r, false)?;
            for col in columns {
-                if col >= column_start {
-                    if col > column_end {
+                if col >= column {
+                    if col >= column + column_count {
                        self.move_cell(sheet, r, col, r, col - column_count)?;
                    } else {
-                        self.cell_clear_all(sheet, r, col)?;
+                        self.delete_cell(sheet, r, col)?;
                    }
                }
            }
@@ -194,64 +184,6 @@ impl Model {
                delta: -column_count,
            }),
        );
-        let worksheet = &mut self.workbook.worksheet_mut(sheet)?;
-
-        // deletes all the column styles
-        let mut new_columns = Vec::new();
-        for col in worksheet.cols.iter_mut() {
-            // range under study
-            let min = col.min;
-            let max = col.max;
-            // In the diagram:
-            // |xxxxx| range we are studying [min, max]
-            // |*****| range we are deleting [column_start, column_end]
-            // we are going to split it in three big cases:
-            // ----------------|xxxxxxxx|-----------------
-            // -----|*****|------------------------------- Case A
-            // -------|**********|------------------------ Case B
-            // -------------|**************|-------------- Case C
-            // ------------------|****|------------------- Case D
-            // ---------------------|**********|---------- Case E
-            // -----------------------------|*****|------- Case F
-            if column_start < min {
-                if column_end < min {
-                    // Case A
-                    // We displace all columns
-                    let mut new_column = col.clone();
-                    new_column.min = min - column_count;
-                    new_column.max = max - column_count;
-                    new_columns.push(new_column);
-                } else if column_end < max {
-                    // Case B
-                    // We displace the end
-                    let mut new_column = col.clone();
-                    new_column.min = column_start;
-                    new_column.max = max - column_count;
-                    new_columns.push(new_column);
-                } else {
-                    // Case C
-                    // skip this, we are deleting the whole range
-                }
-            } else if column_start <= max {
-                if column_end <= max {
-                    // Case D
-                    // We displace the end
-                    let mut new_column = col.clone();
-                    new_column.max = max - column_count;
-                    new_columns.push(new_column);
-                } else {
-                    // Case E
-                    let mut new_column = col.clone();
-                    new_column.max = column_start - 1;
-                    new_columns.push(new_column);
-                }
-            } else {
-                // Case F
-                // No action required
-                new_columns.push(col.clone());
-            }
-        }
-        worksheet.cols = new_columns;

        Ok(())
    }
@@ -268,7 +200,7 @@ impl Model {
            return Err("Cannot add a negative number of cells :)".to_string());
        }
        // Check if it is possible:
-        let dimensions = self.workbook.worksheet(sheet)?.get_dimension();
+        let dimensions = self.workbook.worksheet(sheet)?.dimension();
        let last_row = dimensions.max_row + row_count;
        if last_row > LAST_ROW {
            return Err(
@@ -351,7 +283,7 @@ impl Model {
                    // remove all cells in row
                    // FIXME: We could just remove the entire row in one go
                    for column in columns {
-                        self.cell_clear_all(sheet, r, column)?;
+                        self.delete_cell(sheet, r, column)?;
                    }
                }
            }
@@ -372,162 +304,13 @@ impl Model {
            }
        }
        self.workbook.worksheets[sheet as usize].rows = new_rows;
-        self.displace_cells(&DisplaceData::Row {
-            sheet,
-            row,
-            delta: -row_count,
-        });
-        Ok(())
-    }
-
-    pub fn delete_cells_and_shift_left(
-        &mut self,
-        sheet: u32,
-        row: i32,
-        column: i32,
-        row_delta: i32,
-        column_delta: i32,
-    ) -> Result<(), String> {
-        let worksheet = &mut self.workbook.worksheet_mut(sheet)?;
-        let max_column = worksheet.get_dimension().max_column;
-
-        // Delete all cells in the range
-        for r in row..row + row_delta {
-            for c in column..column + column_delta {
-                self.cell_clear_all(sheet, r, c)?;
-            }
-        }
-
-        // Move all cells in the range
-        for r in row..row + row_delta {
-            for c in column + 1..max_column + 1 {
-                println!("{r}-{c}");
-                self.move_cell(sheet, r, c, r, c - column_delta)?;
-            }
-        }
-
-        // Update all formulas in the workbook
-        self.displace_cells(&DisplaceData::ShiftCellsRight {
-            sheet,
-            row,
-            column,
-            column_delta: -column_delta,
-            row_delta,
-        });
-
-        Ok(())
-    }
-
-    /// Insert cells and shift right
-    pub fn insert_cells_and_shift_right(
-        &mut self,
-        sheet: u32,
-        row: i32,
-        column: i32,
-        row_delta: i32,
-        column_delta: i32,
-    ) -> Result<(), String> {
-        let worksheet = &mut self.workbook.worksheet_mut(sheet)?;
-        let max_column = worksheet.get_dimension().max_column;
-
-        // Move all cells in the range
-        for r in row..row + row_delta {
-            for c in (column..max_column + 1).rev() {
-                self.move_cell(sheet, r, c, r, c + column_delta)?;
-            }
-        }
-
-        // Delete all cells in the range
-        for r in row..row + row_delta {
-            for c in column..column + column_delta {
-                self.cell_clear_all(sheet, r, c)?;
-            }
-        }
-
-        // Update all formulas in the workbook
-        self.displace_cells(&DisplaceData::ShiftCellsRight {
-            sheet,
-            row,
-            column,
-            column_delta,
-            row_delta,
-        });
-
-        Ok(())
-    }
-
-    /// Insert cells and shift down
-    pub fn insert_cells_and_shift_down(
-        &mut self,
-        sheet: u32,
-        row: i32,
-        column: i32,
-        row_delta: i32,
-        column_delta: i32,
-    ) -> Result<(), String> {
-        let worksheet = &mut self.workbook.worksheet_mut(sheet)?;
-        let max_row = worksheet.get_dimension().max_row;
-
-        // Move all cells in the range
-        for r in (row..row + max_row + 1).rev() {
-            for c in column..column + column_delta {
-                self.move_cell(sheet, r, c, r, c + column_delta)?;
-            }
-        }
-
-        // Delete all cells in the range
-        for r in row..row + row_delta {
-            for c in column..column + column_delta {
-                self.cell_clear_all(sheet, r, c)?;
-            }
-        }
-
-        // Update all formulas in the workbook
-        self.displace_cells(&DisplaceData::ShiftCellsDown {
-            sheet,
-            row,
-            column,
-            column_delta,
-            row_delta,
-        });
-
-        Ok(())
-    }
-
-    pub fn delete_cells_and_shift_up(
-        &mut self,
-        sheet: u32,
-        row: i32,
-        column: i32,
-        row_delta: i32,
-        column_delta: i32,
-    ) -> Result<(), String> {
-        let worksheet = &mut self.workbook.worksheet_mut(sheet)?;
-        let max_row = worksheet.get_dimension().max_row;
-
-        // Delete all cells in the range
-        for r in row..row + row_delta {
-            for c in column..column + column_delta {
-                self.cell_clear_all(sheet, r, c)?;
-            }
-        }
-
-        // Move all cells in the range
-        for r in row..max_row + 1 {
-            for c in column + 1..column + column_delta {
-                self.move_cell(sheet, r, c, r - row_delta, c)?;
-            }
-        }
-
-        // Update all formulas in the workbook
-        self.displace_cells(&DisplaceData::ShiftCellsDown {
-            sheet,
-            row,
-            column,
-            column_delta,
-            row_delta: -row_delta,
-        });
-
+        self.displace_cells(
+            &(DisplaceData::Row {
+                sheet,
+                row,
+                delta: -row_count,
+            }),
+        );
        Ok(())
    }

--- a/base/src/cell.rs
+++ b/base/src/cell.rs
@@ -1,9 +1,12 @@
 use crate::{
    expressions::token::Error, language::Language, number_format::to_excel_precision_str, types::*,
 };
+use serde::{Deserialize, Serialize};
+use serde_json::json;

 /// A CellValue is the representation of the cell content.
-#[derive(Debug, PartialEq)]
+#[derive(Serialize, Deserialize, Debug, PartialEq)]
+#[serde(untagged)]
 pub enum CellValue {
    None,
    String(String),
@@ -11,6 +14,17 @@ pub enum CellValue {
    Boolean(bool),
 }

+impl CellValue {
+    pub fn to_json_str(&self) -> String {
+        match &self {
+            CellValue::None => "null".to_string(),
+            CellValue::String(s) => json!(s).to_string(),
+            CellValue::Number(f) => json!(f).to_string(),
+            CellValue::Boolean(b) => json!(b).to_string(),
+        }
+    }
+}
+
 impl From<f64> for CellValue {
    fn from(value: f64) -> Self {
        Self::Number(value)
--- a/base/src/expressions/lexer/mod.rs
+++ b/base/src/expressions/lexer/mod.rs
@@ -1,5 +1,3 @@
-#![deny(missing_docs)]
-
 //! A tokenizer for spreadsheet formulas.
 //!
 //! This is meant to feed a formula parser.
@@ -9,10 +7,8 @@
 //! It supports two working modes:
 //!
 //! 1. A1 or display mode
-//!
 //!    This is for user formulas. References are like `D4`, `D$4` or `F5:T10`
 //! 2. R1C1, internal or runtime mode
-//!
 //!    A reference like R1C1 refers to $A$1 and R3C4 to $D$4
 //!    R[2]C[5] refers to a cell two rows below and five columns to the right
 //!    It uses the 'en' locale and language.
@@ -59,8 +55,7 @@ use super::token::{Error, TokenType};
 use super::types::*;
 use super::utils;

-/// Returns an iterator over tokens together with their position in the byte string.
-pub mod marked_token;
+pub mod util;

 #[cfg(test)]
 mod test;
@@ -68,28 +63,17 @@ mod test;
 mod ranges;
 mod structured_references;

-/// This is the TokenType we return if we cannot recognize a token
 #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
 pub struct LexerError {
-    /// Position of the beginning of the token in the byte string.
    pub position: usize,
-    /// Message describing what we think the error is.
    pub message: String,
 }

 pub(super) type Result<T> = std::result::Result<T, LexerError>;

-/// Whether we try to parse formulas in A1 mode or in the internal R1C1 mode
 #[derive(Clone, PartialEq, Eq)]
 pub enum LexerMode {
-    /// Cell references are written `=S34`. This is the display mode
    A1,
-    ///    R1C1, internal or runtime mode
-    ///
-    ///    A reference like R1C1 refers to $A$1 and R3C4 to $D$4
-    ///    R[2]C[5] refers to a cell two rows below and five columns to the right
-    ///    It uses the 'en' locale and language.
-    ///    This is used internally at runtime.
    R1C1,
 }

@@ -324,9 +308,9 @@ impl Lexer {
                                return self.consume_range(None);
                            }
                            let name_upper = name.to_ascii_uppercase();
-                            if name_upper == self.language.booleans.r#true {
+                            if name_upper == self.language.booleans.true_value {
                                return TokenType::Boolean(true);
-                            } else if name_upper == self.language.booleans.r#false {
+                            } else if name_upper == self.language.booleans.false_value {
                                return TokenType::Boolean(false);
                            }
                            if self.mode == LexerMode::A1 {
@@ -676,8 +660,8 @@ impl Lexer {
    fn consume_error(&mut self) -> TokenType {
        let errors = &self.language.errors;
        let rest_of_formula: String = self.chars[self.position - 1..self.len].iter().collect();
-        if rest_of_formula.starts_with(&errors.r#ref) {
-            self.position += errors.r#ref.chars().count() - 1;
+        if rest_of_formula.starts_with(&errors.ref_value) {
+            self.position += errors.ref_value.chars().count() - 1;
            return TokenType::Error(Error::REF);
        } else if rest_of_formula.starts_with(&errors.name) {
            self.position += errors.name.chars().count() - 1;
--- a/base/src/expressions/lexer/test/mod.rs
+++ b/base/src/expressions/lexer/test/mod.rs
@@ -1,6 +1,6 @@
 mod test_common;
 mod test_language;
 mod test_locale;
-mod test_marked_token;
 mod test_ranges;
 mod test_tables;
+mod test_util;
--- a/base/src/expressions/lexer/test/test_locale.rs
+++ b/base/src/expressions/lexer/test/test_locale.rs
@@ -6,11 +6,11 @@ use crate::{
        token::TokenType,
    },
    language::get_language,
-    locale::get_locale,
+    locale::get_locale_fix,
 };

 fn new_language_lexer(formula: &str, locale: &str, language: &str) -> Lexer {
-    let locale = get_locale(locale).unwrap();
+    let locale = get_locale_fix(locale).unwrap();
    let language = get_language(language).unwrap();
    Lexer::new(formula, LexerMode::A1, locale, language)
 }
--- a/base/src/expressions/lexer/test/test_marked_token.rs
+++ b/base/src/expressions/lexer/test/test_marked_token.rs
@@ -1,5 +1,5 @@
 use crate::expressions::{
-    lexer::marked_token::{get_tokens, MarkedToken},
+    lexer::util::get_tokens,
    token::{OpCompare, OpSum, TokenType},
 };

@@ -22,29 +22,6 @@ fn test_get_tokens() {
    assert_eq!(l.end, 10);
 }

-#[test]
-fn chinese_characters() {
-    let formula = "\"你好\" & \"世界！\"";
-    let marked_tokens = get_tokens(formula);
-    assert_eq!(marked_tokens.len(), 3);
-    let first_t = MarkedToken {
-        token: TokenType::String("你好".to_string()),
-        start: 0,
-        end: 4,
-    };
-    let second_t = MarkedToken {
-        token: TokenType::And,
-        start: 4,
-        end: 6,
-    };
-    let third_t = MarkedToken {
-        token: TokenType::String("世界！".to_string()),
-        start: 6,
-        end: 12,
-    };
-    assert_eq!(marked_tokens, vec![first_t, second_t, third_t]);
-}
-
 #[test]
 fn test_simple_tokens() {
    assert_eq!(
--- a/base/src/expressions/lexer/marked_token.rs
+++ b/base/src/expressions/lexer/marked_token.rs
@@ -1,5 +1,3 @@
-#![deny(missing_docs)]
-
 use serde::{Deserialize, Serialize};

 use crate::expressions::token;
@@ -11,11 +9,8 @@ use super::{Lexer, LexerMode};
 /// A MarkedToken is a token together with its position on a formula
 #[derive(Debug, PartialEq, Serialize, Deserialize)]
 pub struct MarkedToken {
-    /// Token type (see [token::TokenType])
    pub token: token::TokenType,
-    /// Position of the start of the token (in bytes)
    pub start: i32,
-    /// Position of the end of the token (in bytes)
    pub end: i32,
 }

@@ -24,7 +19,7 @@ pub struct MarkedToken {
 /// # Examples
 /// ```
 /// use ironcalc_base::expressions::{
-///      lexer::marked_token::{get_tokens, MarkedToken},
+///      lexer::util::{get_tokens, MarkedToken},
 ///      token::{OpSum, TokenType},
 /// };
 ///
--- a/base/src/expressions/mod.rs
+++ b/base/src/expressions/mod.rs
@@ -1,3 +1,4 @@
+// public modules
 pub mod lexer;
 pub mod parser;
 pub mod token;
--- a/base/src/expressions/parser/mod.rs
+++ b/base/src/expressions/parser/mod.rs
@@ -1,29 +1,31 @@
-//! # GRAMMAR
-//!
-//! <pre class="rust">
-//! opComp   => '=' | '<' | '>' | '<=' } '>=' | '<>'
-//! opFactor => '*' | '/'
-//! unaryOp  => '-' | '+'
-//!
-//! expr    => concat (opComp concat)*
-//! concat  => term ('&' term)*
-//! term    => factor (opFactor factor)*
-//! factor  => prod (opProd prod)*
-//! prod    => power ('^' power)*
-//! power   => (unaryOp)* range '%'*
-//! range   => primary (':' primary)?
-//! primary => '(' expr ')'
-//!         => number
-//!         => function '(' f_args ')'
-//!         => name
-//!         => string
-//!         => '{' a_args '}'
-//!         => bool
-//!         => bool()
-//!         => error
-//!
-//! f_args  => e (',' e)*
-//! </pre>
+/*!
+# GRAMAR
+
+<pre class="rust">
+opComp   => '=' | '<' | '>' | '<=' } '>=' | '<>'
+opFactor => '*' | '/'
+unaryOp  => '-' | '+'
+
+expr    => concat (opComp concat)*
+concat  => term ('&' term)*
+term    => factor (opFactor factor)*
+factor  => prod (opProd prod)*
+prod    => power ('^' power)*
+power   => (unaryOp)* range '%'*
+range   => primary (':' primary)?
+primary => '(' expr ')'
+        => number
+        => function '(' f_args ')'
+        => name
+        => string
+        => '{' a_args '}'
+        => bool
+        => bool()
+        => error
+
+f_args  => e (',' e)*
+</pre>
+*/

 use std::collections::HashMap;

@@ -42,15 +44,21 @@ use super::utils::number_to_column;

 use token::OpCompare;

-pub(crate) mod move_formula;
-pub(crate) mod walk;
-
-/// Produces a string representation of a formula from the AST.
+pub mod move_formula;
 pub mod stringify;
+pub mod walk;

 #[cfg(test)]
 mod test;

+#[cfg(test)]
+mod test_ranges;
+
+#[cfg(test)]
+mod test_move_formula;
+#[cfg(test)]
+mod test_tables;
+
 pub(crate) fn parse_range(formula: &str) -> Result<(i32, i32, i32, i32), String> {
    let mut lexer = lexer::Lexer::new(
        formula,
@@ -214,7 +222,7 @@ impl Parser {

    pub fn parse(&mut self, formula: &str, context: &Option<CellReferenceRC>) -> Node {
        self.lexer.set_formula(formula);
-        self.context.clone_from(context);
+        self.context = context.clone();
        self.parse_expr()
    }

--- a/base/src/expressions/parser/stringify.rs
+++ b/base/src/expressions/parser/stringify.rs
@@ -1,75 +1,43 @@
-#![deny(missing_docs)]
-
 use super::{super::utils::quote_name, Node, Reference};
 use crate::constants::{LAST_COLUMN, LAST_ROW};
 use crate::expressions::token::OpUnary;
 use crate::{expressions::types::CellReferenceRC, number_format::to_excel_precision_str};

-/// Displaced data
 pub enum DisplaceData {
-    /// Displaces columns (inserting or deleting columns)
    Column {
-        /// Sheet in which the displace data applies
        sheet: u32,
-        /// Column from which the data is displaced
        column: i32,
-        /// Number of columns displaced (might be negative, e.g. when deleting columns)
        delta: i32,
    },
-    /// Displaces rows (Inserting or deleting rows)
    Row {
-        /// Sheet in which the displace data applies
        sheet: u32,
-        /// Row from which the data is displaced
        row: i32,
-        /// Number of rows displaced (might be negative, e.g. when deleting rows)
        delta: i32,
    },
-    /// Displaces cells horizontally
-    ShiftCellsRight {
-        /// Sheet in which the displace data applies
+    CellHorizontal {
        sheet: u32,
-        /// Row of the to left corner
        row: i32,
-        /// Column of the top left corner
        column: i32,
-        /// Number of rows to be displaced
-        row_delta: i32,
-        /// Number of columns to be displaced (might be negative)
-        column_delta: i32,
+        delta: i32,
    },
-    /// Displaces cells vertically
-    ShiftCellsDown {
-        /// Sheet in which the displace data applies
+    CellVertical {
        sheet: u32,
-        /// Row of the to left corner
        row: i32,
-        /// Column of the top left corner
        column: i32,
-        /// Number of rows displaced (might be negative)
-        row_delta: i32,
-        /// Number of columns to be displaced
-        column_delta: i32,
+        delta: i32,
    },
-    /// Displaces data due to a column move from column to column + delta
    ColumnMove {
-        /// Sheet in which the displace data applies
        sheet: u32,
-        /// Column that is moved
        column: i32,
-        /// The position of the new column is column + delta (might be negative)
        delta: i32,
    },
-    /// Doesn't do any cell displacement
    None,
 }

-/// Stringifies the AST formula in its internal R1C1 format
 pub fn to_rc_format(node: &Node) -> String {
    stringify(node, None, &DisplaceData::None, false)
 }

-/// Stringifies the formula applying the _displace_data_.
 pub fn to_string_displaced(
    node: &Node,
    context: &CellReferenceRC,
@@ -78,12 +46,10 @@ pub fn to_string_displaced(
    stringify(node, Some(context), displace_data, false)
 }

-/// Stringifies a formula from the AST
 pub fn to_string(node: &Node, context: &CellReferenceRC) -> String {
    stringify(node, Some(context), &DisplaceData::None, false)
 }

-/// Stringifies the formula for Excel compatibility
 pub fn to_excel_string(node: &Node, context: &CellReferenceRC) -> String {
    stringify(node, Some(context), &DisplaceData::None, true)
 }
@@ -150,49 +116,41 @@ pub(crate) fn stringify_reference(
                        }
                    }
                }
-                DisplaceData::ShiftCellsRight {
+                DisplaceData::CellHorizontal {
                    sheet,
                    row: displace_row,
                    column: displace_column,
-                    column_delta,
-                    row_delta,
+                    delta,
                } => {
-                    if sheet_index == *sheet
-                        && displace_row >= &row
-                        && *displace_row < row + *row_delta
-                    {
-                        if *column_delta < 0 {
+                    if sheet_index == *sheet && displace_row == &row {
+                        if *delta < 0 {
                            if &column >= displace_column {
-                                if column < displace_column - *column_delta {
+                                if column < displace_column - *delta {
                                    return "#REF!".to_string();
                                }
-                                column += *column_delta;
+                                column += *delta;
                            }
                        } else if &column >= displace_column {
-                            column += *column_delta;
+                            column += *delta;
                        }
                    }
                }
-                DisplaceData::ShiftCellsDown {
+                DisplaceData::CellVertical {
                    sheet,
                    row: displace_row,
                    column: displace_column,
-                    row_delta,
-                    column_delta,
+                    delta,
                } => {
-                    if sheet_index == *sheet
-                        && displace_column >= &column
-                        && *displace_column < column + *column_delta
-                    {
-                        if *row_delta < 0 {
+                    if sheet_index == *sheet && displace_column == &column {
+                        if *delta < 0 {
                            if &row >= displace_row {
-                                if row < displace_row - *row_delta {
+                                if row < displace_row - *delta {
                                    return "#REF!".to_string();
                                }
-                                row += *row_delta;
+                                row += *delta;
                            }
                        } else if &row >= displace_row {
-                            row += *row_delta;
+                            row += *delta;
                        }
                    }
                }
--- a/base/src/expressions/parser/test/test_genertal.rs
+++ b/base/src/expressions/parser/test/test_genertal.rs
@@ -1,12 +1,17 @@
 use std::collections::HashMap;

 use crate::expressions::lexer::LexerMode;
-use crate::expressions::parser::stringify::{to_string_displaced, DisplaceData};
-use crate::expressions::parser::{
-    stringify::{to_rc_format, to_string},
-    Node, Parser,
+use crate::expressions::parser::stringify::DisplaceData;
+
+use super::super::types::CellReferenceRC;
+use super::Parser;
+use super::{
+    super::parser::{
+        stringify::{to_rc_format, to_string},
+        Node,
+    },
+    stringify::to_string_displaced,
 };
-use crate::expressions::types::CellReferenceRC;

 struct Formula<'a> {
    initial: &'a str,
--- a/base/src/expressions/parser/test/mod.rs
+++ b/base/src/expressions/parser/test/mod.rs
@@ -1,4 +0,0 @@
-mod test_genertal;
-mod test_move_formula;
-mod test_ranges;
-mod test_tables;
--- a/base/src/expressions/parser/test/test_move_formula.rs
+++ b/base/src/expressions/parser/test/test_move_formula.rs
@@ -1,8 +1,10 @@
 use std::collections::HashMap;

 use crate::expressions::parser::move_formula::{move_formula, MoveContext};
-use crate::expressions::parser::Parser;
-use crate::expressions::types::{Area, CellReferenceRC};
+use crate::expressions::types::Area;
+
+use super::super::types::CellReferenceRC;
+use super::Parser;

 #[test]
 fn test_move_formula() {
--- a/base/src/expressions/parser/test/test_ranges.rs
+++ b/base/src/expressions/parser/test/test_ranges.rs
@@ -2,9 +2,9 @@ use std::collections::HashMap;

 use crate::expressions::lexer::LexerMode;

-use crate::expressions::parser::stringify::{to_rc_format, to_string};
-use crate::expressions::parser::Parser;
-use crate::expressions::types::CellReferenceRC;
+use super::super::parser::stringify::{to_rc_format, to_string};
+use super::super::types::CellReferenceRC;
+use super::Parser;

 struct Formula<'a> {
    formula_a1: &'a str,
--- a/base/src/expressions/parser/test/test_tables.rs
+++ b/base/src/expressions/parser/test/test_tables.rs
@@ -6,8 +6,8 @@ use crate::expressions::parser::stringify::to_string;
 use crate::expressions::utils::{number_to_column, parse_reference_a1};
 use crate::types::{Table, TableColumn, TableStyleInfo};

-use crate::expressions::parser::Parser;
-use crate::expressions::types::CellReferenceRC;
+use super::super::types::CellReferenceRC;
+use super::Parser;

 fn create_test_table(
    table_name: &str,
--- a/base/src/expressions/token.rs
+++ b/base/src/expressions/token.rs
@@ -1,7 +1,7 @@
 use std::fmt;

-use bitcode::{Decode, Encode};
 use serde::{Deserialize, Serialize};
+use serde_repr::{Deserialize_repr, Serialize_repr};

 use crate::language::Language;

@@ -80,7 +80,8 @@ impl fmt::Display for OpProduct {
 ///  * "#ERROR!" means there was an error processing the formula (for instance "=A1+")
 ///  * "#N/IMPL!" means the formula or feature in Excel but has not been implemented in IronCalc
 /// Note that they are serialized/deserialized by index
-#[derive(Serialize, Deserialize, Encode, Decode, Debug, PartialEq, Eq, Clone)]
+#[derive(Serialize_repr, Deserialize_repr, Debug, PartialEq, Eq, Clone)]
+#[repr(u8)]
 pub enum Error {
    REF,
    NAME,
@@ -118,7 +119,7 @@ impl Error {
    pub fn to_localized_error_string(&self, language: &Language) -> String {
        match self {
            Error::NULL => language.errors.null.to_string(),
-            Error::REF => language.errors.r#ref.to_string(),
+            Error::REF => language.errors.ref_value.to_string(),
            Error::NAME => language.errors.name.to_string(),
            Error::VALUE => language.errors.value.to_string(),
            Error::DIV => language.errors.div.to_string(),
@@ -135,7 +136,7 @@ impl Error {

 pub fn get_error_by_name(name: &str, language: &Language) -> Option<Error> {
    let errors = &language.errors;
-    if name == errors.r#ref {
+    if name == errors.ref_value {
        return Some(Error::REF);
    } else if name == errors.name {
        return Some(Error::NAME);
--- a/base/src/functions/date_and_time.rs
+++ b/base/src/functions/date_and_time.rs
@@ -1,6 +1,7 @@
-use chrono::DateTime;
 use chrono::Datelike;
 use chrono::Months;
+use chrono::NaiveDateTime;
+use chrono::TimeZone;
 use chrono::Timelike;

 use crate::expressions::types::CellReferenceIndex;
@@ -257,8 +258,8 @@ impl Model {
        // milliseconds since January 1, 1970 00:00:00 UTC.
        let milliseconds = get_milliseconds_since_epoch();
        let seconds = milliseconds / 1000;
-        let local_time = match DateTime::from_timestamp(seconds, 0) {
-            Some(dt) => dt.with_timezone(&self.tz),
+        let dt = match NaiveDateTime::from_timestamp_opt(seconds, 0) {
+            Some(dt) => dt,
            None => {
                return CalcResult::Error {
                    error: Error::ERROR,
@@ -267,6 +268,7 @@ impl Model {
                }
            }
        };
+        let local_time = self.tz.from_utc_datetime(&dt);
        // 693_594 is computed as:
        // NaiveDate::from_ymd(1900, 1, 1).num_days_from_ce() - 2
        // The 2 days offset is because of Excel 1900 bug
@@ -287,8 +289,8 @@ impl Model {
        // milliseconds since January 1, 1970 00:00:00 UTC.
        let milliseconds = get_milliseconds_since_epoch();
        let seconds = milliseconds / 1000;
-        let local_time = match DateTime::from_timestamp(seconds, 0) {
-            Some(dt) => dt.with_timezone(&self.tz),
+        let dt = match NaiveDateTime::from_timestamp_opt(seconds, 0) {
+            Some(dt) => dt,
            None => {
                return CalcResult::Error {
                    error: Error::ERROR,
@@ -297,6 +299,7 @@ impl Model {
                }
            }
        };
+        let local_time = self.tz.from_utc_datetime(&dt);
        // 693_594 is computed as:
        // NaiveDate::from_ymd(1900, 1, 1).num_days_from_ce() - 2
        // The 2 days offset is because of Excel 1900 bug
--- a/base/src/functions/engineering/complex.rs
+++ b/base/src/functions/engineering/complex.rs
@@ -3,7 +3,7 @@ use std::fmt;
 use crate::{
    calc_result::CalcResult,
    expressions::{
-        lexer::marked_token::get_tokens,
+        lexer::util::get_tokens,
        parser::Node,
        token::{Error, OpSum, TokenType},
        types::CellReferenceIndex,
--- a/base/src/functions/financial.rs
+++ b/base/src/functions/financial.rs
@@ -221,7 +221,7 @@ impl Model {
                        .workbook
                        .worksheet(left.sheet)
                        .expect("Sheet expected during evaluation.")
-                        .get_dimension()
+                        .dimension()
                        .max_row;
                }
                if column1 == 1 && column2 == LAST_COLUMN {
@@ -229,7 +229,7 @@ impl Model {
                        .workbook
                        .worksheet(left.sheet)
                        .expect("Sheet expected during evaluation.")
-                        .get_dimension()
+                        .dimension()
                        .max_column;
                }
                for row in row1..row2 + 1 {
@@ -284,7 +284,7 @@ impl Model {
                        .workbook
                        .worksheet(left.sheet)
                        .expect("Sheet expected during evaluation.")
-                        .get_dimension()
+                        .dimension()
                        .max_row;
                }
                if column1 == 1 && column2 == LAST_COLUMN {
@@ -292,7 +292,7 @@ impl Model {
                        .workbook
                        .worksheet(left.sheet)
                        .expect("Sheet expected during evaluation.")
-                        .get_dimension()
+                        .dimension()
                        .max_column;
                }
                for row in row1..row2 + 1 {
@@ -360,7 +360,7 @@ impl Model {
                        .workbook
                        .worksheet(left.sheet)
                        .expect("Sheet expected during evaluation.")
-                        .get_dimension()
+                        .dimension()
                        .max_row;
                }
                if column1 == 1 && column2 == LAST_COLUMN {
@@ -368,7 +368,7 @@ impl Model {
                        .workbook
                        .worksheet(left.sheet)
                        .expect("Sheet expected during evaluation.")
-                        .get_dimension()
+                        .dimension()
                        .max_column;
                }
                for row in row1..row2 + 1 {
@@ -866,7 +866,7 @@ impl Model {
                            .workbook
                            .worksheet(left.sheet)
                            .expect("Sheet expected during evaluation.")
-                            .get_dimension()
+                            .dimension()
                            .max_row;
                    }
                    if column1 == 1 && column2 == LAST_COLUMN {
@@ -874,7 +874,7 @@ impl Model {
                            .workbook
                            .worksheet(left.sheet)
                            .expect("Sheet expected during evaluation.")
-                            .get_dimension()
+                            .dimension()
                            .max_column;
                    }
                    for row in row1..row2 + 1 {
--- a/base/src/functions/information.rs
+++ b/base/src/functions/information.rs
@@ -165,8 +165,7 @@ impl Model {
                    message: "argument must be a reference to a single cell".to_string(),
                };
            }
-            let is_formula = if let Ok(f) = self.get_cell_formula(left.sheet, left.row, left.column)
-            {
+            let is_formula = if let Ok(f) = self.cell_formula(left.sheet, left.row, left.column) {
                f.is_some()
            } else {
                false
--- a/base/src/functions/mathematical.rs
+++ b/base/src/functions/mathematical.rs
@@ -132,7 +132,7 @@ impl Model {
                            .workbook
                            .worksheet(left.sheet)
                            .expect("Sheet expected during evaluation.")
-                            .get_dimension()
+                            .dimension()
                            .max_row;
                    }
                    if column1 == 1 && column2 == LAST_COLUMN {
@@ -140,7 +140,7 @@ impl Model {
                            .workbook
                            .worksheet(left.sheet)
                            .expect("Sheet expected during evaluation.")
-                            .get_dimension()
+                            .dimension()
                            .max_column;
                    }
                    for row in row1..row2 + 1 {
@@ -199,7 +199,7 @@ impl Model {
                            .workbook
                            .worksheet(left.sheet)
                            .expect("Sheet expected during evaluation.")
-                            .get_dimension()
+                            .dimension()
                            .max_row;
                    }
                    if column1 == 1 && column2 == LAST_COLUMN {
@@ -207,7 +207,7 @@ impl Model {
                            .workbook
                            .worksheet(left.sheet)
                            .expect("Sheet expected during evaluation.")
-                            .get_dimension()
+                            .dimension()
                            .max_column;
                    }
                    for row in row1..row2 + 1 {
--- a/base/src/functions/mod.rs
+++ b/base/src/functions/mod.rs
@@ -1,5 +1,4 @@
 use core::fmt;
-use std::array::IntoIter;

 use crate::{
    calc_result::CalcResult,
@@ -245,206 +244,6 @@ pub enum Function {
    Subtotal,
 }

-impl Function {
-    pub fn into_iter() -> IntoIter<Function, 192> {
-        [
-            Function::And,
-            Function::False,
-            Function::If,
-            Function::Iferror,
-            Function::Ifna,
-            Function::Ifs,
-            Function::Not,
-            Function::Or,
-            Function::Switch,
-            Function::True,
-            Function::Xor,
-            Function::Sin,
-            Function::Cos,
-            Function::Tan,
-            Function::Asin,
-            Function::Acos,
-            Function::Atan,
-            Function::Sinh,
-            Function::Cosh,
-            Function::Tanh,
-            Function::Asinh,
-            Function::Acosh,
-            Function::Atanh,
-            Function::Abs,
-            Function::Pi,
-            Function::Sqrt,
-            Function::Sqrtpi,
-            Function::Atan2,
-            Function::Power,
-            Function::Max,
-            Function::Min,
-            Function::Product,
-            Function::Rand,
-            Function::Randbetween,
-            Function::Round,
-            Function::Rounddown,
-            Function::Roundup,
-            Function::Sum,
-            Function::Sumif,
-            Function::Sumifs,
-            Function::Choose,
-            Function::Column,
-            Function::Columns,
-            Function::Index,
-            Function::Indirect,
-            Function::Hlookup,
-            Function::Lookup,
-            Function::Match,
-            Function::Offset,
-            Function::Row,
-            Function::Rows,
-            Function::Vlookup,
-            Function::Xlookup,
-            Function::Concatenate,
-            Function::Exact,
-            Function::Value,
-            Function::T,
-            Function::Valuetotext,
-            Function::Concat,
-            Function::Find,
-            Function::Left,
-            Function::Len,
-            Function::Lower,
-            Function::Mid,
-            Function::Right,
-            Function::Search,
-            Function::Text,
-            Function::Trim,
-            Function::Upper,
-            Function::Isnumber,
-            Function::Isnontext,
-            Function::Istext,
-            Function::Islogical,
-            Function::Isblank,
-            Function::Iserr,
-            Function::Iserror,
-            Function::Isna,
-            Function::Na,
-            Function::Isref,
-            Function::Isodd,
-            Function::Iseven,
-            Function::ErrorType,
-            Function::Isformula,
-            Function::Type,
-            Function::Sheet,
-            Function::Average,
-            Function::Averagea,
-            Function::Averageif,
-            Function::Averageifs,
-            Function::Count,
-            Function::Counta,
-            Function::Countblank,
-            Function::Countif,
-            Function::Countifs,
-            Function::Maxifs,
-            Function::Minifs,
-            Function::Year,
-            Function::Day,
-            Function::Month,
-            Function::Eomonth,
-            Function::Date,
-            Function::Edate,
-            Function::Today,
-            Function::Now,
-            Function::Pmt,
-            Function::Pv,
-            Function::Rate,
-            Function::Nper,
-            Function::Fv,
-            Function::Ppmt,
-            Function::Ipmt,
-            Function::Npv,
-            Function::Mirr,
-            Function::Irr,
-            Function::Xirr,
-            Function::Xnpv,
-            Function::Rept,
-            Function::Textafter,
-            Function::Textbefore,
-            Function::Textjoin,
-            Function::Substitute,
-            Function::Ispmt,
-            Function::Rri,
-            Function::Sln,
-            Function::Syd,
-            Function::Nominal,
-            Function::Effect,
-            Function::Pduration,
-            Function::Tbillyield,
-            Function::Tbillprice,
-            Function::Tbilleq,
-            Function::Dollarde,
-            Function::Dollarfr,
-            Function::Ddb,
-            Function::Db,
-            Function::Cumprinc,
-            Function::Cumipmt,
-            Function::Besseli,
-            Function::Besselj,
-            Function::Besselk,
-            Function::Bessely,
-            Function::Erf,
-            Function::ErfPrecise,
-            Function::Erfc,
-            Function::ErfcPrecise,
-            Function::Bin2dec,
-            Function::Bin2hex,
-            Function::Bin2oct,
-            Function::Dec2Bin,
-            Function::Dec2hex,
-            Function::Dec2oct,
-            Function::Hex2bin,
-            Function::Hex2dec,
-            Function::Hex2oct,
-            Function::Oct2bin,
-            Function::Oct2dec,
-            Function::Oct2hex,
-            Function::Bitand,
-            Function::Bitlshift,
-            Function::Bitor,
-            Function::Bitrshift,
-            Function::Bitxor,
-            Function::Complex,
-            Function::Imabs,
-            Function::Imaginary,
-            Function::Imargument,
-            Function::Imconjugate,
-            Function::Imcos,
-            Function::Imcosh,
-            Function::Imcot,
-            Function::Imcsc,
-            Function::Imcsch,
-            Function::Imdiv,
-            Function::Imexp,
-            Function::Imln,
-            Function::Imlog10,
-            Function::Imlog2,
-            Function::Impower,
-            Function::Improduct,
-            Function::Imreal,
-            Function::Imsec,
-            Function::Imsech,
-            Function::Imsin,
-            Function::Imsinh,
-            Function::Imsqrt,
-            Function::Imsub,
-            Function::Imsum,
-            Function::Imtan,
-            Function::Convert,
-            Function::Delta,
-            Function::Gestep,
-            Function::Subtotal,
-        ]
-        .into_iter()
-    }
-}
-
 impl Function {
    /// Some functions in Excel like CONCAT are stringified as `_xlfn.CONCAT`.
    pub fn to_xlsx_string(&self) -> String {
@@ -909,23 +708,7 @@ impl fmt::Display for Function {
    }
 }

-/// Documentation for one function
-pub struct Documentation {
-    pub name: String,
-}
-
 impl Model {
-    /// Produces documentation for all implemented functions
-    pub fn documentation() -> Vec<Documentation> {
-        let mut doc = Vec::new();
-        for function in Function::into_iter() {
-            doc.push(Documentation {
-                name: function.to_string(),
-            });
-        }
-        doc
-    }
-
    pub(crate) fn evaluate_function(
        &mut self,
        kind: &Function,
@@ -1145,66 +928,3 @@ impl Model {
        }
    }
 }
-
-#[cfg(test)]
-mod tests {
-    use std::{
-        fs::File,
-        io::{BufRead, BufReader},
-    };
-
-    use crate::functions::Function;
-
-    #[test]
-    fn function_iterator() {
-        // This checks that the number of functions in the enum is the same
-        // as the number of functions in the Iterator.
-
-        // This is tricky. In Rust we cannot loop over all the members of an enum.
-        // There are alternatives like using an external crate like strum.
-        // But I am not in the mood for that.
-
-        // What we do here is read this file , extract the functions in the enum
-        // and check they are the same as in the iterator
-        let file = File::open("src/functions/mod.rs").unwrap();
-        let reader = BufReader::new(file);
-        let mut start = false;
-        let mut list = Vec::new();
-
-        for line in reader.lines() {
-            let text = line.unwrap();
-            let text = text.trim().trim_end_matches(',');
-            if text == "pub enum Function {" {
-                start = true;
-                continue;
-            }
-            if start {
-                if text == "}" {
-                    break;
-                }
-                if text.starts_with("//") {
-                    // skip comments
-                    continue;
-                }
-                if text.is_empty() {
-                    // skip empty lines
-                    continue;
-                }
-                list.push(text.to_owned());
-            }
-        }
-        // We make a list with their functions names, but we escape ".": ERROR.TYPE => ERRORTYPE
-        let iter_list = Function::into_iter()
-            .map(|f| format!("{}", f).replace('.', ""))
-            .collect::<Vec<_>>();
-
-        let len = iter_list.len();
-
-        assert_eq!(list.len(), len);
-        // We still need to check there are no duplicates. This will fail if a function in iter_list
-        // is included twice and one is missing
-        for function in list {
-            assert!(iter_list.contains(&function.to_uppercase()));
-        }
-    }
-}
--- a/base/src/functions/statistical.rs
+++ b/base/src/functions/statistical.rs
@@ -385,7 +385,7 @@ impl Model {
            .workbook
            .worksheet(first_range.left.sheet)
            .expect("Sheet expected during evaluation.")
-            .get_dimension();
+            .dimension();
        let max_row = dimension.max_row;
        let max_column = dimension.max_column;

@@ -530,7 +530,7 @@ impl Model {
                .workbook
                .worksheet(sum_range.left.sheet)
                .expect("Sheet expected during evaluation.")
-                .get_dimension()
+                .dimension()
                .max_row;
        }
        if left_column == 1 && right_column == LAST_COLUMN {
@@ -538,7 +538,7 @@ impl Model {
                .workbook
                .worksheet(sum_range.left.sheet)
                .expect("Sheet expected during evaluation.")
-                .get_dimension()
+                .dimension()
                .max_column;
        }

--- a/base/src/functions/text.rs
+++ b/base/src/functions/text.rs
@@ -892,7 +892,7 @@ impl Model {
                            .workbook
                            .worksheet(left.sheet)
                            .expect("Sheet expected during evaluation.")
-                            .get_dimension()
+                            .dimension()
                            .max_row;
                    }
                    if column1 == 1 && column2 == LAST_COLUMN {
@@ -900,7 +900,7 @@ impl Model {
                            .workbook
                            .worksheet(left.sheet)
                            .expect("Sheet expected during evaluation.")
-                            .get_dimension()
+                            .dimension()
                            .max_column;
                    }
                    for row in row1..row2 + 1 {
--- a/base/src/functions/xlookup.rs
+++ b/base/src/functions/xlookup.rs
@@ -255,7 +255,7 @@ impl Model {
                                .workbook
                                .worksheet(left.sheet)
                                .expect("Sheet expected during evaluation.")
-                                .get_dimension()
+                                .dimension()
                                .max_row;
                        }
                        if column1 == 1 && column2 == LAST_COLUMN {
@@ -263,7 +263,7 @@ impl Model {
                                .workbook
                                .worksheet(left.sheet)
                                .expect("Sheet expected during evaluation.")
-                                .get_dimension()
+                                .dimension()
                                .max_column;
                        }
                        let left = CellReferenceIndex {
--- a/base/src/garbage_collector.rs
+++ b/base/src/garbage_collector.rs
@@ -0,0 +1,12 @@
+use crate::model::Model;
+
+// The gc (Garbage Collector) cleans up leftover elements in the workbook:
+// * Strings that are no longe reachable
+// * Styles that are no longer reachable
+// * ...
+
+impl Model {
+    pub(crate) fn gc(&mut self) -> Result<(), String> {
+        todo!()
+    }
+}
--- a/base/src/language/language.bin
+++ b/base/src/language/language.bin
@@ -1 +0,0 @@
-PfrendeesD<>VRAITRUEWAHRVERDADEROTVFAUXFALSEFALSCHFALSOUw#REF!#REF!#BEZUG!#¡REF!e<>#NOM?#NAME?#NAME?#¿NOMBRE?x<>#VALEUR!#VALUE!#WERT!#¡VALOR!w<>#DIV/0!#DIV/0!#DIV/0!#¡DIV/0!<04>#N/A#N/A#NV#N/AXv#NOMBRE!#NUM!#ZAHL!#¡NUM!<02><>#N/IMPL!#N/IMPL!#N/IMPL!#N/IMPL!w{#SPILL!#SPILL!#ÜBERLAUF!#SPILL!ff#CALC!#CALC!#CALC!#CALC!ff#CIRC!#CIRC!#CIRC!#CIRC!ww#ERROR!#ERROR!#ERROR!#ERROR!ff#NULL!#NULL!#NULL!#NULL!
--- a/base/src/language/mod.rs
+++ b/base/src/language/mod.rs
@@ -1,17 +1,20 @@
+use once_cell::sync::Lazy;
+use serde::{Deserialize, Serialize};
+
 use std::collections::HashMap;

-use bitcode::{Decode, Encode};
-use once_cell::sync::Lazy;
-
-#[derive(Encode, Decode, Clone)]
+#[derive(Serialize, Deserialize, Clone)]
 pub struct Booleans {
-    pub r#true: String,
-    pub r#false: String,
+    #[serde(rename = "true")]
+    pub true_value: String,
+    #[serde(rename = "false")]
+    pub false_value: String,
 }

-#[derive(Encode, Decode, Clone)]
+#[derive(Serialize, Deserialize, Clone)]
 pub struct Errors {
-    pub r#ref: String,
+    #[serde(rename = "ref")]
+    pub ref_value: String,
    pub name: String,
    pub value: String,
    pub div: String,
@@ -25,14 +28,14 @@ pub struct Errors {
    pub null: String,
 }

-#[derive(Encode, Decode, Clone)]
+#[derive(Serialize, Deserialize, Clone)]
 pub struct Language {
    pub booleans: Booleans,
    pub errors: Errors,
 }

 static LANGUAGES: Lazy<HashMap<String, Language>> = Lazy::new(|| {
-    bitcode::decode(include_bytes!("language.bin")).expect("Failed parsing language file")
+    serde_json::from_str(include_str!("language.json")).expect("Failed parsing language file")
 });

 pub fn get_language(id: &str) -> Result<&Language, String> {
--- a/base/src/lib.rs
+++ b/base/src/lib.rs
@@ -8,7 +8,7 @@
 //!
 //! ```toml
 //! [dependencies]
-//! ironcalc_base = { git = "https://github.com/ironcalc/IronCalc" }
+//! ironcalc_base = { git = "https://github.com/ironcalc/IronCalc", version = "0.1"}
 //! ```
 //!
 //! <small> until version 0.5.0 you should use the git dependencies as stated </small>
@@ -31,30 +31,29 @@ pub mod expressions;
 pub mod formatter;
 pub mod language;
 pub mod locale;
+pub mod model;
 pub mod new_empty;
 pub mod number_format;
 pub mod types;
 pub mod worksheet;

+mod functions;
+
 mod actions;
 mod cast;
 mod constants;
-mod diffs;
-mod functions;
-mod implicit_intersection;
-mod model;
 mod styles;
+
+mod diffs;
+mod implicit_intersection;
+
 mod units;
-mod user_model;
 mod utils;
 mod workbook;
+mod garbage_collector;

 #[cfg(test)]
 mod test;

 #[cfg(test)]
 pub mod mock_time;
-
-pub use model::get_milliseconds_since_epoch;
-pub use model::Model;
-pub use user_model::UserModel;
--- a/base/src/locale/locales.bin
+++ b/base/src/locale/locales.bin
--- a/base/src/locale/mod.rs
+++ b/base/src/locale/mod.rs
@@ -1,29 +1,32 @@
-use bitcode::{Decode, Encode};
 use once_cell::sync::Lazy;
+use serde::{Deserialize, Serialize};

 use std::collections::HashMap;

-#[derive(Encode, Decode, Clone)]
+#[derive(Serialize, Deserialize, Clone)]
 pub struct Locale {
    pub dates: Dates,
    pub numbers: NumbersProperties,
    pub currency: Currency,
 }

-#[derive(Encode, Decode, Clone)]
+#[derive(Serialize, Deserialize, Clone)]
 pub struct Currency {
    pub iso: String,
    pub symbol: String,
 }

-#[derive(Encode, Decode, Clone)]
+#[derive(Serialize, Deserialize, Clone)]
 pub struct NumbersProperties {
+    #[serde(rename = "symbols-numberSystem-latn")]
    pub symbols: NumbersSymbols,
+    #[serde(rename = "decimalFormats-numberSystem-latn")]
    pub decimal_formats: DecimalFormats,
+    #[serde(rename = "currencyFormats-numberSystem-latn")]
    pub currency_formats: CurrencyFormats,
 }

-#[derive(Encode, Decode, Clone)]
+#[derive(Serialize, Deserialize, Clone)]
 pub struct Dates {
    pub day_names: Vec<String>,
    pub day_names_short: Vec<String>,
@@ -32,7 +35,8 @@ pub struct Dates {
    pub months_letter: Vec<String>,
 }

-#[derive(Encode, Decode, Clone)]
+#[derive(Serialize, Deserialize, Clone)]
+#[serde(rename_all = "camelCase")]
 pub struct NumbersSymbols {
    pub decimal: String,
    pub group: String,
@@ -50,26 +54,40 @@ pub struct NumbersSymbols {
 }

 // See: https://cldr.unicode.org/translation/number-currency-formats/number-and-currency-patterns
-#[derive(Encode, Decode, Clone)]
+#[derive(Serialize, Deserialize, Clone)]
 pub struct CurrencyFormats {
    pub standard: String,
+    #[serde(rename = "standard-alphaNextToNumber")]
+    #[serde(skip_serializing_if = "Option::is_none")]
    pub standard_alpha_next_to_number: Option<String>,
+    #[serde(rename = "standard-noCurrency")]
    pub standard_no_currency: String,
    pub accounting: String,
+    #[serde(rename = "accounting-alphaNextToNumber")]
+    #[serde(skip_serializing_if = "Option::is_none")]
    pub accounting_alpha_next_to_number: Option<String>,
+    #[serde(rename = "accounting-noCurrency")]
    pub accounting_no_currency: String,
 }

-#[derive(Encode, Decode, Clone)]
+#[derive(Serialize, Deserialize, Clone)]
+#[serde(rename_all = "camelCase")]
 pub struct DecimalFormats {
    pub standard: String,
 }

-static LOCALES: Lazy<HashMap<String, Locale>> =
-    Lazy::new(|| bitcode::decode(include_bytes!("locales.bin")).expect("Failed parsing locale"));
+static LOCALES: Lazy<HashMap<String, Locale>> = Lazy::new(|| {
+    serde_json::from_str(include_str!("locales.json")).expect("Failed parsing locale")
+});

-pub fn get_locale(id: &str) -> Result<&Locale, String> {
+pub fn get_locale(_id: &str) -> Result<&Locale, String> {
    // TODO: pass the locale once we implement locales in Rust
+    let locale = LOCALES.get("en").ok_or("Invalid locale")?;
+    Ok(locale)
+}
+
+// TODO: Remove this function one we implement locales properly
+pub fn get_locale_fix(id: &str) -> Result<&Locale, String> {
    let locale = LOCALES.get(id).ok_or("Invalid locale")?;
    Ok(locale)
 }
--- a/base/src/mock_time.rs
+++ b/base/src/mock_time.rs
@@ -10,7 +10,7 @@ use std::cell::RefCell;
 // 8 November 2022 12:13 Berlin time

 thread_local! {
-    static MOCK_TIME: RefCell<i64> = const { RefCell::new(1667906008578) };
+    static MOCK_TIME: RefCell<i64> = RefCell::new(1667906008578);
 }

 pub fn get_milliseconds_since_epoch() -> i64 {
@@ -20,18 +20,3 @@ pub fn get_milliseconds_since_epoch() -> i64 {
 pub fn set_mock_time(time: i64) {
    MOCK_TIME.with(|cell| *cell.borrow_mut() = time);
 }
-
-#[cfg(test)]
-mod tests {
-    use crate::mock_time::MOCK_TIME;
-
-    use super::get_milliseconds_since_epoch;
-
-    #[test]
-    fn mock_time() {
-        let t = get_milliseconds_since_epoch();
-        assert_eq!(t, 1667906008578);
-
-        MOCK_TIME.with_borrow(|v| assert_eq!(*v, 1667906008578));
-    }
-}
--- a/base/src/model.rs
+++ b/base/src/model.rs
@@ -1,5 +1,14 @@
 #![deny(missing_docs)]

+//! # Model
+//!
+//! Note that sheets are 0-indexed and rows and columns are 1-indexed.
+//!
+//! IronCalc is row first. A cell is referenced by (`sheet`, `row`, `column`)
+//!
+
+use serde_json::json;
+
 use std::collections::HashMap;
 use std::vec::Vec;

@@ -38,11 +47,7 @@ use chrono_tz::Tz;
 #[cfg(test)]
 pub use crate::mock_time::get_milliseconds_since_epoch;

-/// Number of milliseconds since January 1, 1970
-/// Used by time and date functions. It takes the value from the environment:
-/// * The Operative System
-/// * The JavaScript environment
-/// * Or mocked for tests
+/// wasm implementation for time
 #[cfg(not(test))]
 #[cfg(not(target_arch = "wasm32"))]
 pub fn get_milliseconds_since_epoch() -> i64 {
@@ -53,11 +58,6 @@ pub fn get_milliseconds_since_epoch() -> i64 {
        .as_millis() as i64
 }

-/// Number of milliseconds since January 1, 1970
-/// Used by time and date functions. It takes the value from the environment:
-/// * The Operative System
-/// * The JavaScript environment
-/// * Or mocked for tests
 #[cfg(not(test))]
 #[cfg(target_arch = "wasm32")]
 pub fn get_milliseconds_since_epoch() -> i64 {
@@ -67,7 +67,7 @@ pub fn get_milliseconds_since_epoch() -> i64 {

 /// A cell might be evaluated or being evaluated
 #[derive(Clone)]
-pub(crate) enum CellState {
+pub enum CellState {
    /// The cell has already been evaluated
    Evaluated,
    /// The cell is being evaluated
@@ -75,7 +75,7 @@ pub(crate) enum CellState {
 }

 /// A parsed formula for a defined name
-pub(crate) enum ParsedDefinedName {
+pub enum ParsedDefinedName {
    /// CellReference (`=C4`)
    CellReference(CellReferenceIndex),
    /// A Range (`=C4:D6`)
@@ -105,19 +105,19 @@ pub struct Model {
    /// A list of parsed formulas
    pub parsed_formulas: Vec<Vec<Node>>,
    /// A list of parsed defined names
-    pub(crate) parsed_defined_names: HashMap<(Option<u32>, String), ParsedDefinedName>,
+    pub parsed_defined_names: HashMap<(Option<u32>, String), ParsedDefinedName>,
    /// An optimization to lookup strings faster
-    pub(crate) shared_strings: HashMap<String, usize>,
+    pub shared_strings: HashMap<String, usize>,
    /// An instance of the parser
-    pub(crate) parser: Parser,
+    pub parser: Parser,
    /// The list of cells with formulas that are evaluated of being evaluated
-    pub(crate) cells: HashMap<(u32, i32, i32), CellState>,
+    pub cells: HashMap<(u32, i32, i32), CellState>,
    /// The locale of the model
-    pub(crate) locale: Locale,
+    pub locale: Locale,
    /// Tha language used
-    pub(crate) language: Language,
+    pub language: Language,
    /// The timezone used to evaluate the model
-    pub(crate) tz: Tz,
+    pub tz: Tz,
 }

 // FIXME: Maybe this should be the same as CellReference
@@ -659,7 +659,7 @@ impl Model {
    /// # Examples
    ///
    /// ```rust
-    /// # use ironcalc_base::Model;
+    /// # use ironcalc_base::model::Model;
    /// # fn main() -> Result<(), Box<dyn std::error::Error>> {
    /// let mut model = Model::new_empty("model", "en", "UTC")?;
    /// assert_eq!(model.workbook.worksheet(0)?.color, None);
@@ -726,7 +726,7 @@ impl Model {
    /// # Examples
    ///
    /// ```rust
-    /// # use ironcalc_base::Model;
+    /// # use ironcalc_base::model::Model;
    /// # fn main() -> Result<(), Box<dyn std::error::Error>> {
    /// let mut model = Model::new_empty("model", "en", "UTC")?;
    /// assert_eq!(model.is_empty_cell(0, 1, 1)?, true);
@@ -798,17 +798,17 @@ impl Model {
        None
    }

-    /// Returns a model from an internal binary representation of a workbook
+    /// Returns a model from a String representation of a workbook
    ///
    /// # Examples
    ///
    /// ```rust
-    /// # use ironcalc_base::Model;
+    /// # use ironcalc_base::model::Model;
    /// # use ironcalc_base::cell::CellValue;
    /// # fn main() -> Result<(), Box<dyn std::error::Error>> {
    /// let mut model = Model::new_empty("model", "en", "UTC")?;
    /// model.set_user_input(0, 1, 1, "Stella!".to_string());
-    /// let model2 = Model::from_bytes(&model.to_bytes())?;
+    /// let model2 = Model::from_json(&model.to_json_str())?;
    /// assert_eq!(
    ///     model2.get_cell_value_by_index(0, 1, 1),
    ///     Ok(CellValue::String("Stella!".to_string()))
@@ -816,12 +816,9 @@ impl Model {
    /// # Ok(())
    /// # }
    /// ```
-    ///
-    /// See also:
-    /// * [Model::to_bytes]
-    pub fn from_bytes(s: &[u8]) -> Result<Model, String> {
+    pub fn from_json(s: &str) -> Result<Model, String> {
        let workbook: Workbook =
-            bitcode::decode(s).map_err(|e| format!("Error parsing workbook: {e}"))?;
+            serde_json::from_str(s).map_err(|_| "Error parsing workbook".to_string())?;
        Model::from_workbook(workbook)
    }

@@ -830,7 +827,7 @@ impl Model {
    /// # Examples
    ///
    /// ```rust
-    /// # use ironcalc_base::Model;
+    /// # use ironcalc_base::model::Model;
    /// # use ironcalc_base::cell::CellValue;
    /// # fn main() -> Result<(), Box<dyn std::error::Error>> {
    /// let mut model = Model::new_empty("model", "en", "UTC")?;
@@ -899,7 +896,7 @@ impl Model {
    /// # Examples
    ///
    /// ```rust
-    /// # use ironcalc_base::Model;
+    /// # use ironcalc_base::model::Model;
    /// # use ironcalc_base::expressions::types::CellReferenceIndex;
    /// # fn main() -> Result<(), Box<dyn std::error::Error>> {
    /// let mut model = Model::new_empty("model", "en", "UTC")?;
@@ -968,7 +965,7 @@ impl Model {
    /// # Examples
    ///
    /// ```rust
-    /// # use ironcalc_base::Model;
+    /// # use ironcalc_base::model::Model;
    /// # use ironcalc_base::expressions::types::{Area, CellReferenceIndex};
    /// # fn main() -> Result<(), Box<dyn std::error::Error>> {
    /// let mut model = Model::new_empty("model", "en", "UTC")?;
@@ -1039,7 +1036,7 @@ impl Model {
    /// # Examples
    ///
    /// ```rust
-    /// # use ironcalc_base::Model;
+    /// # use ironcalc_base::model::Model;
    /// # fn main() -> Result<(), Box<dyn std::error::Error>> {
    /// let mut model = Model::new_empty("model", "en", "UTC")?;
    /// let (sheet, row, column) = (0, 1, 1);
@@ -1086,7 +1083,7 @@ impl Model {
    /// # Examples
    ///
    /// ```rust
-    /// # use ironcalc_base::Model;
+    /// # use ironcalc_base::model::Model;
    /// # use ironcalc_base::expressions::types::CellReferenceIndex;
    /// # fn main() -> Result<(), Box<dyn std::error::Error>> {
    /// let mut model = Model::new_empty("model", "en", "UTC")?;
@@ -1141,13 +1138,13 @@ impl Model {
    /// # Examples
    ///
    /// ```rust
-    /// # use ironcalc_base::Model;
+    /// # use ironcalc_base::model::Model;
    /// # fn main() -> Result<(), Box<dyn std::error::Error>> {
    /// let mut model = Model::new_empty("model", "en", "UTC")?;
    /// let (sheet, row, column) = (0, 1, 1);
    /// model.set_user_input(sheet, row, column, "=SIN(B1*C3)+1".to_string());
    /// model.evaluate();
-    /// let result = model.get_cell_formula(sheet, row, column)?;
+    /// let result = model.cell_formula(sheet, row, column)?;
    /// assert_eq!(result, Some("=SIN(B1*C3)+1".to_string()));
    /// # Ok(())
    /// # }
@@ -1155,33 +1152,24 @@ impl Model {
    ///
    /// See also:
    /// * [Model::get_cell_content()]
-    pub fn get_cell_formula(
+    pub fn cell_formula(
        &self,
        sheet: u32,
        row: i32,
        column: i32,
    ) -> Result<Option<String>, String> {
        let worksheet = self.workbook.worksheet(sheet)?;
-        match worksheet.cell(row, column) {
-            Some(cell) => match cell.get_formula() {
-                Some(formula_index) => {
-                    let formula = &self
-                        .parsed_formulas
-                        .get(sheet as usize)
-                        .ok_or("missing sheet")?
-                        .get(formula_index as usize)
-                        .ok_or("missing formula")?;
-                    let cell_ref = CellReferenceRC {
-                        sheet: worksheet.get_name(),
-                        row,
-                        column,
-                    };
-                    Ok(Some(format!("={}", to_string(formula, &cell_ref))))
-                }
-                None => Ok(None),
-            },
-            None => Ok(None),
-        }
+        Ok(worksheet.cell(row, column).and_then(|cell| {
+            cell.get_formula().map(|formula_index| {
+                let formula = &self.parsed_formulas[sheet as usize][formula_index as usize];
+                let cell_ref = CellReferenceRC {
+                    sheet: worksheet.get_name(),
+                    row,
+                    column,
+                };
+                format!("={}", to_string(formula, &cell_ref))
+            })
+        }))
    }

    /// Updates the value of a cell with some text
@@ -1190,7 +1178,7 @@ impl Model {
    /// # Examples
    ///
    /// ```rust
-    /// # use ironcalc_base::Model;
+    /// # use ironcalc_base::model::Model;
    /// # fn main() -> Result<(), Box<dyn std::error::Error>> {
    /// let mut model = Model::new_empty("model", "en", "UTC")?;
    /// let (sheet, row, column) = (0, 1, 1);
@@ -1233,7 +1221,7 @@ impl Model {
    /// # Examples
    ///
    /// ```rust
-    /// # use ironcalc_base::Model;
+    /// # use ironcalc_base::model::Model;
    /// # fn main() -> Result<(), Box<dyn std::error::Error>> {
    /// let mut model = Model::new_empty("model", "en", "UTC")?;
    /// let (sheet, row, column) = (0, 1, 1);
@@ -1270,7 +1258,7 @@ impl Model {
    /// # Examples
    ///
    /// ```rust
-    /// # use ironcalc_base::Model;
+    /// # use ironcalc_base::model::Model;
    /// # fn main() -> Result<(), Box<dyn std::error::Error>> {
    /// let mut model = Model::new_empty("model", "en", "UTC")?;
    /// let (sheet, row, column) = (0, 1, 1);
@@ -1308,7 +1296,7 @@ impl Model {
    /// # Examples
    ///
    /// ```rust
-    /// # use ironcalc_base::Model;
+    /// # use ironcalc_base::model::Model;
    /// # fn main() -> Result<(), Box<dyn std::error::Error>> {
    /// let mut model = Model::new_empty("model", "en", "UTC")?;
    /// let (sheet, row, column) = (0, 1, 1);
@@ -1360,7 +1348,7 @@ impl Model {
    /// # Examples
    ///
    /// ```rust
-    /// # use ironcalc_base::Model;
+    /// # use ironcalc_base::model::Model;
    /// # use ironcalc_base::cell::CellValue;
    /// # fn main() -> Result<(), Box<dyn std::error::Error>> {
    /// let mut model = Model::new_empty("model", "en", "UTC")?;
@@ -1370,7 +1358,7 @@ impl Model {
    /// model.set_user_input(0, 1, 2, "=SUM(A:A)".to_string());
    /// model.evaluate();
    /// assert_eq!(model.get_cell_value_by_index(0, 1, 2), Ok(CellValue::Number(215.0)));
-    /// assert_eq!(model.get_formatted_cell_value(0, 1, 2), Ok("215$".to_string()));
+    /// assert_eq!(model.formatted_cell_value(0, 1, 2), Ok("215$".to_string()));
    /// # Ok(())
    /// # }
    /// ```
@@ -1541,7 +1529,7 @@ impl Model {
    /// Returns the cell value for (`sheet`, `row`, `column`)
    ///
    /// See also:
-    /// * [Model::get_formatted_cell_value()]
+    /// * [Model::formatted_cell_value()]
    pub fn get_cell_value_by_index(
        &self,
        sheet_index: u32,
@@ -1567,42 +1555,35 @@ impl Model {
    /// # Examples
    ///
    /// ```rust
-    /// # use ironcalc_base::Model;
+    /// # use ironcalc_base::model::Model;
    /// # fn main() -> Result<(), Box<dyn std::error::Error>> {
    /// let mut model = Model::new_empty("model", "en", "UTC")?;
    /// let (sheet, row, column) = (0, 1, 1);
    /// model.set_user_input(sheet, row, column, "=1/3".to_string());
    /// model.evaluate();
-    /// let result = model.get_formatted_cell_value(sheet, row, column)?;
+    /// let result = model.formatted_cell_value(sheet, row, column)?;
    /// assert_eq!(result, "0.333333333".to_string());
    /// # Ok(())
    /// # }
    /// ```
-    pub fn get_formatted_cell_value(
+    pub fn formatted_cell_value(
        &self,
        sheet_index: u32,
        row: i32,
        column: i32,
    ) -> Result<String, String> {
-        match self.workbook.worksheet(sheet_index)?.cell(row, column) {
-            Some(cell) => {
-                let format = self.get_style_for_cell(sheet_index, row, column).num_fmt;
-                let formatted_value =
-                    cell.formatted_value(&self.workbook.shared_strings, &self.language, |value| {
-                        format_number(value, &format, &self.locale).text
-                    });
-                Ok(formatted_value)
-            }
-            None => Ok("".to_string()),
-        }
-    }
-
-    /// Return the typeof a cell
-    pub fn get_cell_type(&self, sheet: u32, row: i32, column: i32) -> Result<CellType, String> {
-        Ok(match self.workbook.worksheet(sheet)?.cell(row, column) {
-            Some(c) => c.get_type(),
-            None => CellType::Number,
-        })
+        let format = self.get_style_for_cell(sheet_index, row, column).num_fmt;
+        let cell = self
+            .workbook
+            .worksheet(sheet_index)?
+            .cell(row, column)
+            .cloned()
+            .unwrap_or_default();
+        let formatted_value =
+            cell.formatted_value(&self.workbook.shared_strings, &self.language, |value| {
+                format_number(value, &format, &self.locale).text
+            });
+        Ok(formatted_value)
    }

    /// Returns a string with the cell content. If there is a formula returns the formula
@@ -1666,53 +1647,15 @@ impl Model {
        }
    }

-    /// Removes the content of the cell but leaves the style.
-    ///
-    /// See also:
-    /// * [Model::cell_clear_all()]
-    ///
-    /// # Examples
-    ///
-    /// ```rust
-    /// # use ironcalc_base::Model;
-    /// # fn main() -> Result<(), Box<dyn std::error::Error>> {
-    /// let mut model = Model::new_empty("model", "en", "UTC")?;
-    /// let (sheet, row, column) = (0, 1, 1);
-    /// model.set_user_input(sheet, row, column, "100$".to_string());
-    /// model.cell_clear_contents(sheet, row, column);
-    /// model.set_user_input(sheet, row, column, "10".to_string());
-    /// let result = model.get_formatted_cell_value(sheet, row, column)?;
-    /// assert_eq!(result, "10$".to_string());
-    /// # Ok(())
-    /// # }
-    /// ```
-    pub fn cell_clear_contents(&mut self, sheet: u32, row: i32, column: i32) -> Result<(), String> {
-        self.workbook
-            .worksheet_mut(sheet)?
-            .cell_clear_contents(row, column);
+    /// Sets cell to empty. Can be used to delete value without affecting style.
+    pub fn set_cell_empty(&mut self, sheet: u32, row: i32, column: i32) -> Result<(), String> {
+        let worksheet = self.workbook.worksheet_mut(sheet)?;
+        worksheet.set_cell_empty(row, column);
        Ok(())
    }

-    /// Deletes a cell by removing it from worksheet data. All content and style is removed.
-    ///
-    /// See also:
-    /// * [Model::cell_clear_contents()]
-    ///
-    /// # Examples
-    ///
-    /// ```rust
-    /// # use ironcalc_base::Model;
-    /// # fn main() -> Result<(), Box<dyn std::error::Error>> {
-    /// let mut model = Model::new_empty("model", "en", "UTC")?;
-    /// let (sheet, row, column) = (0, 1, 1);
-    /// model.set_user_input(sheet, row, column, "100$".to_string());
-    /// model.cell_clear_all(sheet, row, column);
-    /// model.set_user_input(sheet, row, column, "10".to_string());
-    /// let result = model.get_formatted_cell_value(sheet, row, column)?;
-    /// assert_eq!(result, "10".to_string());
-    /// # Ok(())
-    /// # }
-    pub fn cell_clear_all(&mut self, sheet: u32, row: i32, column: i32) -> Result<(), String> {
+    /// Deletes a cell by removing it from worksheet data.
+    pub fn delete_cell(&mut self, sheet: u32, row: i32, column: i32) -> Result<(), String> {
        let worksheet = self.workbook.worksheet_mut(sheet)?;

        let sheet_data = &mut worksheet.sheet_data;
@@ -1739,8 +1682,9 @@ impl Model {
                    if r.r == row {
                        if r.custom_format {
                            return r.s;
+                        } else {
+                            break;
                        }
-                        break;
                    }
                }
                let cols = &self.workbook.worksheets[sheet as usize].cols;
@@ -1763,32 +1707,21 @@ impl Model {
            .get_style(self.get_cell_style_index(sheet, row, column))
    }

-    /// Returns an internal binary representation of the workbook
-    ///
-    /// See also:
-    /// * [Model::from_bytes]
-    pub fn to_bytes(&self) -> Vec<u8> {
-        bitcode::encode(&self.workbook)
-    }
-
-    /// Returns data about the worksheets
-    pub fn get_worksheets_properties(&self) -> Vec<SheetProperties> {
-        self.workbook
-            .worksheets
-            .iter()
-            .map(|worksheet| SheetProperties {
-                name: worksheet.get_name(),
-                state: worksheet.state.to_string(),
-                color: worksheet.color.clone(),
-                sheet_id: worksheet.sheet_id,
-            })
-            .collect()
+    /// Returns a JSON string of the workbook
+    pub fn to_json_str(&self) -> String {
+        match serde_json::to_string(&self.workbook) {
+            Ok(s) => s,
+            Err(_) => {
+                // TODO, is this branch possible at all?
+                json!({"error": "Error stringifying workbook"}).to_string()
+            }
+        }
    }

    /// Returns markup representation of the given `sheet`.
-    pub fn get_sheet_markup(&self, sheet: u32) -> Result<String, String> {
+    pub fn sheet_markup(&self, sheet: u32) -> Result<String, String> {
        let worksheet = self.workbook.worksheet(sheet)?;
-        let dimension = worksheet.get_dimension();
+        let dimension = worksheet.dimension();

        let mut rows = Vec::new();

@@ -1796,9 +1729,9 @@ impl Model {
            let mut row_markup: Vec<String> = Vec::new();

            for column in 1..(dimension.max_column + 1) {
-                let mut cell_markup = match self.get_cell_formula(sheet, row, column)? {
+                let mut cell_markup = match self.cell_formula(sheet, row, column)? {
                    Some(formula) => formula,
-                    None => self.get_formatted_cell_value(sheet, row, column)?,
+                    None => self.formatted_cell_value(sheet, row, column)?,
                };
                let style = self.get_style_for_cell(sheet, row, column);
                if style.font.b {
@@ -1837,7 +1770,7 @@ impl Model {
    }

    /// Returns the number of frozen rows in `sheet`
-    pub fn get_frozen_rows_count(&self, sheet: u32) -> Result<i32, String> {
+    pub fn get_frozen_rows(&self, sheet: u32) -> Result<i32, String> {
        if let Some(worksheet) = self.workbook.worksheets.get(sheet as usize) {
            Ok(worksheet.frozen_rows)
        } else {
@@ -1846,7 +1779,7 @@ impl Model {
    }

    /// Return the number of frozen columns in `sheet`
-    pub fn get_frozen_columns_count(&self, sheet: u32) -> Result<i32, String> {
+    pub fn get_frozen_columns(&self, sheet: u32) -> Result<i32, String> {
        if let Some(worksheet) = self.workbook.worksheets.get(sheet as usize) {
            Ok(worksheet.frozen_columns)
        } else {
@@ -1887,34 +1820,6 @@ impl Model {
            Err("Invalid sheet".to_string())
        }
    }
-
-    /// Returns the width of a column
-    #[inline]
-    pub fn get_column_width(&self, sheet: u32, column: i32) -> Result<f64, String> {
-        self.workbook.worksheet(sheet)?.get_column_width(column)
-    }
-
-    /// Sets the width of a column
-    #[inline]
-    pub fn set_column_width(&mut self, sheet: u32, column: i32, width: f64) -> Result<(), String> {
-        self.workbook
-            .worksheet_mut(sheet)?
-            .set_column_width(column, width)
-    }
-
-    /// Returns the height of a row
-    #[inline]
-    pub fn get_row_height(&self, sheet: u32, row: i32) -> Result<f64, String> {
-        self.workbook.worksheet(sheet)?.row_height(row)
-    }
-
-    /// Sets the height of a row
-    #[inline]
-    pub fn set_row_height(&mut self, sheet: u32, column: i32, height: f64) -> Result<(), String> {
-        self.workbook
-            .worksheet_mut(sheet)?
-            .set_row_height(column, height)
-    }
 }

 #[cfg(test)]
--- a/base/src/new_empty.rs
+++ b/base/src/new_empty.rs
@@ -1,4 +1,4 @@
-use chrono::DateTime;
+use chrono::NaiveDateTime;

 use std::collections::HashMap;

@@ -6,16 +6,14 @@ use crate::{
    calc_result::Range,
    expressions::{
        lexer::LexerMode,
-        parser::{
-            stringify::{rename_sheet_in_node, to_rc_format},
-            Parser,
-        },
+        parser::stringify::{rename_sheet_in_node, to_rc_format},
+        parser::Parser,
        types::CellReferenceRC,
    },
    language::get_language,
    locale::get_locale,
    model::{get_milliseconds_since_epoch, Model, ParsedDefinedName},
-    types::{Metadata, Selection, SheetState, Workbook, WorkbookSettings, Worksheet},
+    types::{Metadata, SheetState, Workbook, WorkbookSettings, Worksheet},
    utils::ParsedReference,
 };

@@ -50,12 +48,6 @@ impl Model {
            color: Default::default(),
            frozen_columns: 0,
            frozen_rows: 0,
-            selection: Selection {
-                is_selected: false,
-                row: 1,
-                column: 1,
-                range: [1, 1, 1, 1],
-            },
        }
    }

@@ -131,7 +123,7 @@ impl Model {
    }

    // Reparses all formulas and defined names
-    pub(crate) fn reset_parsed_structures(&mut self) {
+    fn reset_parsed_structures(&mut self) {
        self.parser
            .set_worksheets(self.workbook.get_worksheet_names());
        self.parsed_formulas = vec![];
@@ -142,10 +134,10 @@ impl Model {
    }

    /// Adds a sheet with a automatically generated name
-    pub fn new_sheet(&mut self) -> (String, u32) {
+    pub fn new_sheet(&mut self) {
        // First we find a name

-        // TODO: The name should depend on the locale
+        // TODO: When/if we support i18n the name could depend on the locale
        let base_name = "Sheet";
        let base_name_uppercase = base_name.to_uppercase();
        let mut index = 1;
@@ -164,7 +156,6 @@ impl Model {
        let worksheet = Model::new_empty_worksheet(&sheet_name, sheet_id);
        self.workbook.worksheets.push(worksheet);
        self.reset_parsed_structures();
-        (sheet_name, self.workbook.worksheets.len() as u32 - 1)
    }

    /// Inserts a sheet with a particular index
@@ -232,10 +223,10 @@ impl Model {
        new_name: &str,
    ) -> Result<(), String> {
        if !is_valid_sheet_name(new_name) {
-            return Err(format!("Invalid name for a sheet: '{}'.", new_name));
+            return Err(format!("Invalid name for a sheet: '{}'", new_name));
        }
        if self.get_sheet_index_by_name(new_name).is_some() {
-            return Err(format!("Sheet already exists: '{}'.", new_name));
+            return Err(format!("Sheet already exists: '{}'", new_name));
        }
        let worksheets = &self.workbook.worksheets;
        let sheet_count = worksheets.len() as u32;
@@ -279,7 +270,7 @@ impl Model {
        if sheet_count == 1 {
            return Err("Cannot delete only sheet".to_string());
        };
-        if sheet_index >= sheet_count {
+        if sheet_index > sheet_count {
            return Err("Sheet index too large".to_string());
        }
        self.workbook.worksheets.remove(sheet_index as usize);
@@ -332,7 +323,7 @@ impl Model {

        let milliseconds = get_milliseconds_since_epoch();
        let seconds = milliseconds / 1000;
-        let dt = match DateTime::from_timestamp(seconds, 0) {
+        let dt = match NaiveDateTime::from_timestamp_opt(seconds, 0) {
            Some(s) => s,
            None => return Err(format!("Invalid timestamp: {}", milliseconds)),
        };
--- a/base/src/test/functions/mod.rs
+++ b/base/src/test/functions/mod.rs
@@ -1,18 +0,0 @@
-mod test_fn_average;
-mod test_fn_averageifs;
-mod test_fn_choose;
-mod test_fn_concatenate;
-mod test_fn_count;
-mod test_fn_exact;
-mod test_fn_financial;
-mod test_fn_if;
-mod test_fn_maxifs;
-mod test_fn_minifs;
-mod test_fn_offset;
-mod test_fn_product;
-mod test_fn_rept;
-mod test_fn_sum;
-mod test_fn_sumifs;
-mod test_fn_textbefore;
-mod test_fn_textjoin;
-mod test_fn_type;
--- a/base/src/test/mod.rs
+++ b/base/src/test/mod.rs
@@ -1,39 +1,56 @@
-mod engineering;
-mod functions;
 mod test_actions;
 mod test_binary_search;
 mod test_cell;
-mod test_cell_clear_contents;
 mod test_circular_references;
 mod test_column_width;
 mod test_criteria;
 mod test_currency;
 mod test_date_and_time;
 mod test_error_propagation;
-mod test_escape_quotes;
-mod test_extend;
+mod test_fn_average;
+mod test_fn_averageifs;
+mod test_fn_choose;
+mod test_fn_concatenate;
+mod test_fn_count;
+mod test_fn_exact;
+mod test_fn_financial;
+mod test_fn_if;
+mod test_fn_maxifs;
+mod test_fn_minifs;
+mod test_fn_product;
+mod test_fn_rept;
+mod test_fn_sum;
+mod test_fn_sumifs;
+mod test_fn_textbefore;
+mod test_fn_textjoin;
 mod test_forward_references;
-mod test_frozen_rows_and_columns;
 mod test_frozen_rows_columns;
 mod test_general;
-mod test_get_cell_content;
 mod test_math;
 mod test_metadata;
-mod test_model_cell_clear_all;
+mod test_model_delete_cell;
 mod test_model_is_empty_cell;
+mod test_model_set_cell_empty;
 mod test_move_formula;
-mod test_number_format;
-mod test_percentage;
 mod test_quote_prefix;
 mod test_set_user_input;
 mod test_sheet_markup;
 mod test_sheets;
-mod test_shift_cells;
 mod test_styles;
-mod test_today;
 mod test_trigonometric;
-mod test_types;
 mod test_workbook;
 mod test_worksheet;
-mod user_model;
 pub(crate) mod util;
+
+mod engineering;
+mod test_fn_offset;
+mod test_number_format;
+
+mod test_escape_quotes;
+mod test_extend;
+mod test_fn_type;
+mod test_frozen_rows_and_columns;
+mod test_get_cell_content;
+mod test_percentage;
+mod test_today;
+mod test_gc;
--- a/base/src/test/test_actions.rs
+++ b/base/src/test/test_actions.rs
@@ -3,7 +3,6 @@
 use crate::constants::LAST_COLUMN;
 use crate::model::Model;
 use crate::test::util::new_empty_model;
-use crate::types::Col;

 #[test]
 fn test_insert_columns() {
@@ -196,250 +195,6 @@ fn test_delete_columns() {
    assert_eq!(model._get_formula("A3"), *"=SUM(#REF!:K4)");
 }

-#[test]
-fn test_delete_column_width() {
-    let mut model = new_empty_model();
-    let (sheet, column) = (0, 5);
-    let normal_width = model.get_column_width(sheet, column).unwrap();
-    // Set the width of one column to 5 times the normal width
-    assert!(model
-        .set_column_width(sheet, column, normal_width * 5.0)
-        .is_ok());
-
-    // delete it
-    assert!(model.delete_columns(sheet, column, 1).is_ok());
-
-    // all the columns around have the expected width
-    assert_eq!(
-        model.get_column_width(sheet, column - 1).unwrap(),
-        normal_width
-    );
-    assert_eq!(model.get_column_width(sheet, column).unwrap(), normal_width);
-    assert_eq!(
-        model.get_column_width(sheet, column + 1).unwrap(),
-        normal_width
-    );
-}
-
-#[test]
-// We set the style of columns 4 to 7 and delete column 4
-// We check that columns 4 to 6 have the new style
-fn test_delete_first_column_width() {
-    let mut model = new_empty_model();
-    model.workbook.worksheets[0].cols = vec![Col {
-        min: 4,
-        max: 7,
-        width: 300.0,
-        custom_width: true,
-        style: None,
-    }];
-    let (sheet, column) = (0, 4);
-    assert!(model.delete_columns(sheet, column, 1).is_ok());
-    let cols = &model.workbook.worksheets[0].cols;
-    assert_eq!(cols.len(), 1);
-    assert_eq!(
-        cols[0],
-        Col {
-            min: 4,
-            max: 6,
-            width: 300.0,
-            custom_width: true,
-            style: None
-        }
-    );
-}
-
-#[test]
-// Delete the last column in the range
-fn test_delete_last_column_width() {
-    let mut model = new_empty_model();
-    model.workbook.worksheets[0].cols = vec![Col {
-        min: 4,
-        max: 7,
-        width: 300.0,
-        custom_width: true,
-        style: None,
-    }];
-    let (sheet, column) = (0, 7);
-    assert!(model.delete_columns(sheet, column, 1).is_ok());
-    let cols = &model.workbook.worksheets[0].cols;
-    assert_eq!(cols.len(), 1);
-    assert_eq!(
-        cols[0],
-        Col {
-            min: 4,
-            max: 6,
-            width: 300.0,
-            custom_width: true,
-            style: None
-        }
-    );
-}
-
-#[test]
-// Deletes columns at the end
-fn test_delete_last_few_columns_width() {
-    let mut model = new_empty_model();
-    model.workbook.worksheets[0].cols = vec![Col {
-        min: 4,
-        max: 17,
-        width: 300.0,
-        custom_width: true,
-        style: None,
-    }];
-    let (sheet, column) = (0, 13);
-    assert!(model.delete_columns(sheet, column, 10).is_ok());
-    let cols = &model.workbook.worksheets[0].cols;
-    assert_eq!(cols.len(), 1);
-    assert_eq!(
-        cols[0],
-        Col {
-            min: 4,
-            max: 12,
-            width: 300.0,
-            custom_width: true,
-            style: None
-        }
-    );
-}
-
-#[test]
-fn test_delete_columns_non_overlapping_left() {
-    let mut model = new_empty_model();
-    model.workbook.worksheets[0].cols = vec![Col {
-        min: 10,
-        max: 17,
-        width: 300.0,
-        custom_width: true,
-        style: None,
-    }];
-    let (sheet, column) = (0, 3);
-    assert!(model.delete_columns(sheet, column, 4).is_ok());
-    let cols = &model.workbook.worksheets[0].cols;
-    assert_eq!(cols.len(), 1);
-    assert_eq!(
-        cols[0],
-        Col {
-            min: 6,
-            max: 13,
-            width: 300.0,
-            custom_width: true,
-            style: None
-        }
-    );
-}
-
-#[test]
-fn test_delete_columns_overlapping_left() {
-    let mut model = new_empty_model();
-    model.workbook.worksheets[0].cols = vec![Col {
-        min: 10,
-        max: 20,
-        width: 300.0,
-        custom_width: true,
-        style: None,
-    }];
-    let (sheet, column) = (0, 8);
-    assert!(model.delete_columns(sheet, column, 4).is_ok());
-    let cols = &model.workbook.worksheets[0].cols;
-    assert_eq!(cols.len(), 1);
-    assert_eq!(
-        cols[0],
-        Col {
-            min: 8,
-            max: 16,
-            width: 300.0,
-            custom_width: true,
-            style: None
-        }
-    );
-}
-
-#[test]
-fn test_delete_columns_non_overlapping_right() {
-    let mut model = new_empty_model();
-    model.workbook.worksheets[0].cols = vec![Col {
-        min: 10,
-        max: 17,
-        width: 300.0,
-        custom_width: true,
-        style: None,
-    }];
-    let (sheet, column) = (0, 23);
-    assert!(model.delete_columns(sheet, column, 4).is_ok());
-    let cols = &model.workbook.worksheets[0].cols;
-    assert_eq!(cols.len(), 1);
-    assert_eq!(
-        cols[0],
-        Col {
-            min: 10,
-            max: 17,
-            width: 300.0,
-            custom_width: true,
-            style: None
-        }
-    );
-}
-
-#[test]
-// deletes some columns in the middle of the range
-fn test_delete_middle_column_width() {
-    let mut model = new_empty_model();
-    // styled columns [4, 17]
-    model.workbook.worksheets[0].cols = vec![Col {
-        min: 4,
-        max: 17,
-        width: 300.0,
-        custom_width: true,
-        style: None,
-    }];
-
-    // deletes columns 10, 11, 12
-    let (sheet, column) = (0, 10);
-    assert!(model.delete_columns(sheet, column, 3).is_ok());
-    let cols = &model.workbook.worksheets[0].cols;
-    assert_eq!(cols.len(), 1);
-    assert_eq!(
-        cols[0],
-        Col {
-            min: 4,
-            max: 14,
-            width: 300.0,
-            custom_width: true,
-            style: None
-        }
-    );
-}
-
-#[test]
-// the range is inside the deleted columns
-fn delete_range_in_columns() {
-    let mut model = new_empty_model();
-    // styled columns [6, 10]
-    model.workbook.worksheets[0].cols = vec![Col {
-        min: 6,
-        max: 10,
-        width: 300.0,
-        custom_width: true,
-        style: None,
-    }];
-
-    // deletes columns [4, 17]
-    let (sheet, column) = (0, 4);
-    assert!(model.delete_columns(sheet, column, 8).is_ok());
-    let cols = &model.workbook.worksheets[0].cols;
-    assert_eq!(cols.len(), 0);
-}
-
-#[test]
-fn test_delete_columns_error() {
-    let mut model = new_empty_model();
-    let (sheet, column) = (0, 5);
-    assert!(model.delete_columns(sheet, column, -1).is_err());
-    assert!(model.delete_columns(sheet, column, 0).is_err());
-    assert!(model.delete_columns(sheet, column, 1).is_ok());
-}
-
 #[test]
 fn test_delete_rows() {
    let mut model = new_empty_model();
--- a/base/src/test/test_column_width.rs
+++ b/base/src/test/test_column_width.rs
@@ -23,9 +23,9 @@ fn test_column_width() {
        .unwrap();
    assert_eq!(model.workbook.worksheets[0].cols.len(), 3);
    let worksheet = model.workbook.worksheet(0).unwrap();
-    assert!((worksheet.get_column_width(1).unwrap() - DEFAULT_COLUMN_WIDTH).abs() < f64::EPSILON);
-    assert!((worksheet.get_column_width(2).unwrap() - 30.0).abs() < f64::EPSILON);
-    assert!((worksheet.get_column_width(3).unwrap() - DEFAULT_COLUMN_WIDTH).abs() < f64::EPSILON);
+    assert!((worksheet.column_width(1).unwrap() - DEFAULT_COLUMN_WIDTH).abs() < f64::EPSILON);
+    assert!((worksheet.column_width(2).unwrap() - 30.0).abs() < f64::EPSILON);
+    assert!((worksheet.column_width(3).unwrap() - DEFAULT_COLUMN_WIDTH).abs() < f64::EPSILON);
    assert_eq!(model.get_cell_style_index(0, 23, 2), 6);
 }

@@ -48,11 +48,9 @@ fn test_column_width_lower_edge() {
        .unwrap();
    assert_eq!(model.workbook.worksheets[0].cols.len(), 2);
    let worksheet = model.workbook.worksheet(0).unwrap();
-    assert!((worksheet.get_column_width(4).unwrap() - DEFAULT_COLUMN_WIDTH).abs() < f64::EPSILON);
-    assert!((worksheet.get_column_width(5).unwrap() - 30.0).abs() < f64::EPSILON);
-    assert!(
-        (worksheet.get_column_width(6).unwrap() - 10.0 * COLUMN_WIDTH_FACTOR).abs() < f64::EPSILON
-    );
+    assert!((worksheet.column_width(4).unwrap() - DEFAULT_COLUMN_WIDTH).abs() < f64::EPSILON);
+    assert!((worksheet.column_width(5).unwrap() - 30.0).abs() < f64::EPSILON);
+    assert!((worksheet.column_width(6).unwrap() - 10.0 * COLUMN_WIDTH_FACTOR).abs() < f64::EPSILON);
    assert_eq!(model.get_cell_style_index(0, 23, 5), 1);
 }

@@ -76,9 +74,9 @@ fn test_column_width_higher_edge() {
    assert_eq!(model.workbook.worksheets[0].cols.len(), 2);
    let worksheet = model.workbook.worksheet(0).unwrap();
    assert!(
-        (worksheet.get_column_width(15).unwrap() - 10.0 * COLUMN_WIDTH_FACTOR).abs() < f64::EPSILON
+        (worksheet.column_width(15).unwrap() - 10.0 * COLUMN_WIDTH_FACTOR).abs() < f64::EPSILON
    );
-    assert!((worksheet.get_column_width(16).unwrap() - 30.0).abs() < f64::EPSILON);
-    assert!((worksheet.get_column_width(17).unwrap() - DEFAULT_COLUMN_WIDTH).abs() < f64::EPSILON);
+    assert!((worksheet.column_width(16).unwrap() - 30.0).abs() < f64::EPSILON);
+    assert!((worksheet.column_width(17).unwrap() - DEFAULT_COLUMN_WIDTH).abs() < f64::EPSILON);
    assert_eq!(model.get_cell_style_index(0, 23, 16), 1);
 }
--- a/base/src/test/functions/test_fn_average.rs
+++ b/base/src/test/functions/test_fn_average.rs
--- a/base/src/test/functions/test_fn_averageifs.rs
+++ b/base/src/test/functions/test_fn_averageifs.rs
--- a/base/src/test/functions/test_fn_choose.rs
+++ b/base/src/test/functions/test_fn_choose.rs
--- a/base/src/test/functions/test_fn_concatenate.rs
+++ b/base/src/test/functions/test_fn_concatenate.rs
--- a/base/src/test/functions/test_fn_count.rs
+++ b/base/src/test/functions/test_fn_count.rs
--- a/base/src/test/functions/test_fn_exact.rs
+++ b/base/src/test/functions/test_fn_exact.rs
--- a/base/src/test/functions/test_fn_financial.rs
+++ b/base/src/test/functions/test_fn_financial.rs
--- a/base/src/test/functions/test_fn_if.rs
+++ b/base/src/test/functions/test_fn_if.rs
--- a/base/src/test/functions/test_fn_maxifs.rs
+++ b/base/src/test/functions/test_fn_maxifs.rs
--- a/base/src/test/functions/test_fn_minifs.rs
+++ b/base/src/test/functions/test_fn_minifs.rs
--- a/base/src/test/functions/test_fn_offset.rs
+++ b/base/src/test/functions/test_fn_offset.rs
--- a/base/src/test/functions/test_fn_product.rs
+++ b/base/src/test/functions/test_fn_product.rs
--- a/base/src/test/functions/test_fn_rept.rs
+++ b/base/src/test/functions/test_fn_rept.rs
--- a/base/src/test/functions/test_fn_sum.rs
+++ b/base/src/test/functions/test_fn_sum.rs
--- a/base/src/test/functions/test_fn_sumifs.rs
+++ b/base/src/test/functions/test_fn_sumifs.rs
--- a/base/src/test/functions/test_fn_textbefore.rs
+++ b/base/src/test/functions/test_fn_textbefore.rs
--- a/base/src/test/functions/test_fn_textjoin.rs
+++ b/base/src/test/functions/test_fn_textjoin.rs
--- a/base/src/test/functions/test_fn_type.rs
+++ b/base/src/test/functions/test_fn_type.rs
--- a/base/src/test/test_frozen_rows_and_columns.rs
+++ b/base/src/test/test_frozen_rows_and_columns.rs
@@ -8,37 +8,34 @@ use crate::{
 #[test]
 fn test_empty_model() {
    let mut model = new_empty_model();
-    assert_eq!(model.get_frozen_rows_count(0), Ok(0));
-    assert_eq!(model.get_frozen_columns_count(0), Ok(0));
+    assert_eq!(model.get_frozen_rows(0), Ok(0));
+    assert_eq!(model.get_frozen_columns(0), Ok(0));

    let e = model.set_frozen_rows(0, 3);
    assert!(e.is_ok());
-    assert_eq!(model.get_frozen_rows_count(0), Ok(3));
-    assert_eq!(model.get_frozen_columns_count(0), Ok(0));
+    assert_eq!(model.get_frozen_rows(0), Ok(3));
+    assert_eq!(model.get_frozen_columns(0), Ok(0));

    let e = model.set_frozen_columns(0, 53);
    assert!(e.is_ok());
-    assert_eq!(model.get_frozen_rows_count(0), Ok(3));
-    assert_eq!(model.get_frozen_columns_count(0), Ok(53));
+    assert_eq!(model.get_frozen_rows(0), Ok(3));
+    assert_eq!(model.get_frozen_columns(0), Ok(53));

    // Set them back to zero
    let e = model.set_frozen_rows(0, 0);
    assert!(e.is_ok());
    let e = model.set_frozen_columns(0, 0);
    assert!(e.is_ok());
-    assert_eq!(model.get_frozen_rows_count(0), Ok(0));
-    assert_eq!(model.get_frozen_columns_count(0), Ok(0));
+    assert_eq!(model.get_frozen_rows(0), Ok(0));
+    assert_eq!(model.get_frozen_columns(0), Ok(0));
 }

 #[test]
 fn test_invalid_sheet() {
    let mut model = new_empty_model();
+    assert_eq!(model.get_frozen_rows(1), Err("Invalid sheet".to_string()));
    assert_eq!(
-        model.get_frozen_rows_count(1),
-        Err("Invalid sheet".to_string())
-    );
-    assert_eq!(
-        model.get_frozen_columns_count(3),
+        model.get_frozen_columns(3),
        Err("Invalid sheet".to_string())
    );

--- a/base/src/test/test_gc.rs
+++ b/base/src/test/test_gc.rs
@@ -0,0 +1,22 @@
+#![allow(clippy::unwrap_used)]
+
+use crate::test::util::new_empty_model;
+
+#[test]
+fn test_empty_model() {
+    let mut model = new_empty_model();
+    // set a string
+    model._set("A1", "Hello");
+    assert_eq!(model.shared_strings.len(), 1);
+    // calling the gc doesn't do anything
+    model.gc().unwrap();
+    assert_eq!(model.shared_strings.len(), 1);
+
+    // If we delete the cell the string is still in the list
+    model.delete_cell(0, 1, 1).unwrap();
+    assert_eq!(model.shared_strings.len(), 1);
+
+    // after the gc the string is no longer present
+    model.gc().unwrap();
+    assert_eq!(model.shared_strings.len(), 0);
+}
--- a/base/src/test/test_general.rs
+++ b/base/src/test/test_general.rs
@@ -411,11 +411,11 @@ fn test_get_formatted_cell_value() {

    model.evaluate();

-    assert_eq!(model.get_formatted_cell_value(0, 1, 1).unwrap(), "foobar");
-    assert_eq!(model.get_formatted_cell_value(0, 2, 1).unwrap(), "TRUE");
-    assert_eq!(model.get_formatted_cell_value(0, 3, 1).unwrap(), "");
-    assert_eq!(model.get_formatted_cell_value(0, 4, 1).unwrap(), "123.456");
-    assert_eq!(model.get_formatted_cell_value(0, 5, 1).unwrap(), "$123.46");
+    assert_eq!(model.formatted_cell_value(0, 1, 1).unwrap(), "foobar");
+    assert_eq!(model.formatted_cell_value(0, 2, 1).unwrap(), "TRUE");
+    assert_eq!(model.formatted_cell_value(0, 3, 1).unwrap(), "");
+    assert_eq!(model.formatted_cell_value(0, 4, 1).unwrap(), "123.456");
+    assert_eq!(model.formatted_cell_value(0, 5, 1).unwrap(), "$123.46");
 }

 #[test]
@@ -426,20 +426,20 @@ fn test_cell_formula() {
    model.evaluate();

    assert_eq!(
-        model.get_cell_formula(0, 1, 1), // A1
+        model.cell_formula(0, 1, 1), // A1
        Ok(Some("=1+2+3".to_string())),
    );
    assert_eq!(
-        model.get_cell_formula(0, 2, 1), // A2
+        model.cell_formula(0, 2, 1), // A2
        Ok(None),
    );
    assert_eq!(
-        model.get_cell_formula(0, 3, 1), // A3 - empty cell
+        model.cell_formula(0, 3, 1), // A3 - empty cell
        Ok(None),
    );

    assert_eq!(
-        model.get_cell_formula(42, 1, 1),
+        model.cell_formula(42, 1, 1),
        Err("Invalid sheet index".to_string()),
    );
 }
@@ -453,16 +453,16 @@ fn test_xlfn() {
    model.evaluate();
    // Only modern formulas strip the '_xlfn.'
    assert_eq!(
-        model.get_cell_formula(0, 1, 1).unwrap(),
+        model.cell_formula(0, 1, 1).unwrap(),
        Some("=_xlfn.SIN(1)".to_string())
    );
    // unknown formulas keep the '_xlfn.' prefix
    assert_eq!(
-        model.get_cell_formula(0, 2, 1).unwrap(),
+        model.cell_formula(0, 2, 1).unwrap(),
        Some("=_xlfn.SINY(1)".to_string())
    );
    assert_eq!(
-        model.get_cell_formula(0, 3, 1).unwrap(),
+        model.cell_formula(0, 3, 1).unwrap(),
        Some("=CONCAT(3,4)".to_string())
    );
 }
@@ -474,11 +474,11 @@ fn test_letter_case() {
    model._set("A2", "=sIn(2)");
    model.evaluate();
    assert_eq!(
-        model.get_cell_formula(0, 1, 1).unwrap(),
+        model.cell_formula(0, 1, 1).unwrap(),
        Some("=SIN(1)".to_string())
    );
    assert_eq!(
-        model.get_cell_formula(0, 2, 1).unwrap(),
+        model.cell_formula(0, 2, 1).unwrap(),
        Some("=SIN(2)".to_string())
    );
 }
--- a/base/src/test/test_model_cell_clear_all.rs
+++ b/base/src/test/test_model_cell_clear_all.rs
@@ -2,22 +2,22 @@
 use crate::test::util::new_empty_model;

 #[test]
-fn test_cell_clear_all_non_existing_sheet() {
+fn test_delete_cell_non_existing_sheet() {
    let mut model = new_empty_model();
    assert_eq!(
-        model.cell_clear_all(13, 1, 1),
+        model.delete_cell(13, 1, 1),
        Err("Invalid sheet index".to_string())
    );
 }

 #[test]
-fn test_cell_clear_all_unset_cell() {
+fn test_delete_cell_unset_cell() {
    let mut model = new_empty_model();
-    assert!(model.cell_clear_all(0, 1, 1).is_ok());
+    assert!(model.delete_cell(0, 1, 1).is_ok());
 }

 #[test]
-fn test_cell_clear_all_with_value() {
+fn test_delete_cell_with_value() {
    let mut model = new_empty_model();
    model._set("A1", "hello");
    model.evaluate();
@@ -25,7 +25,7 @@ fn test_cell_clear_all_with_value() {
    assert_eq!(model._get_text_at(0, 1, 1), "hello");
    assert_eq!(model.is_empty_cell(0, 1, 1), Ok(false));

-    model.cell_clear_all(0, 1, 1).unwrap();
+    model.delete_cell(0, 1, 1).unwrap();
    model.evaluate();

    assert_eq!(model._get_text_at(0, 1, 1), "");
@@ -33,7 +33,7 @@ fn test_cell_clear_all_with_value() {
 }

 #[test]
-fn test_cell_clear_all_referenced_elsewhere() {
+fn test_delete_cell_referenced_elsewhere() {
    let mut model = new_empty_model();
    model._set("A1", "35");
    model._set("A2", "=2*A1");
@@ -44,7 +44,7 @@ fn test_cell_clear_all_referenced_elsewhere() {
    assert_eq!(model.is_empty_cell(0, 1, 1), Ok(false));
    assert_eq!(model.is_empty_cell(0, 2, 1), Ok(false));

-    model.cell_clear_all(0, 1, 1).unwrap();
+    model.delete_cell(0, 1, 1).unwrap();
    model.evaluate();

    assert_eq!(model._get_text_at(0, 1, 1), "");
--- a/base/src/test/test_model_is_empty_cell.rs
+++ b/base/src/test/test_model_is_empty_cell.rs
@@ -16,7 +16,7 @@ fn test_is_empty_cell() {
    assert!(model.is_empty_cell(0, 3, 1).unwrap());
    model.set_user_input(0, 3, 1, "Hello World".to_string());
    assert!(!model.is_empty_cell(0, 3, 1).unwrap());
-    model.cell_clear_contents(0, 3, 1).unwrap();
+    model.set_cell_empty(0, 3, 1).unwrap();
    assert!(model.is_empty_cell(0, 3, 1).unwrap());
 }

--- a/base/src/test/test_model_set_cell_empty.rs
+++ b/base/src/test/test_model_set_cell_empty.rs
@@ -2,25 +2,25 @@
 use crate::test::util::new_empty_model;

 #[test]
-fn test_cell_clear_contents_non_existing_sheet() {
+fn test_set_cell_empty_non_existing_sheet() {
    let mut model = new_empty_model();
    assert_eq!(
-        model.cell_clear_contents(13, 1, 1),
+        model.set_cell_empty(13, 1, 1),
        Err("Invalid sheet index".to_string())
    );
 }

 #[test]
-fn test_cell_clear_contents_unset_cell() {
+fn test_set_cell_empty_unset_cell() {
    let mut model = new_empty_model();
-    model.cell_clear_contents(0, 1, 1).unwrap();
+    model.set_cell_empty(0, 1, 1).unwrap();
    assert_eq!(model.is_empty_cell(0, 1, 1), Ok(true));
    model.evaluate();
    assert_eq!(model._get_text_at(0, 1, 1), "");
 }

 #[test]
-fn test_cell_clear_contents_with_value() {
+fn test_set_cell_empty_with_value() {
    let mut model = new_empty_model();
    model._set("A1", "hello");
    model.evaluate();
@@ -28,7 +28,7 @@ fn test_cell_clear_contents_with_value() {
    assert_eq!(model._get_text_at(0, 1, 1), "hello");
    assert_eq!(model.is_empty_cell(0, 1, 1), Ok(false));

-    model.cell_clear_contents(0, 1, 1).unwrap();
+    model.set_cell_empty(0, 1, 1).unwrap();
    model.evaluate();

    assert_eq!(model._get_text_at(0, 1, 1), "");
@@ -36,7 +36,7 @@ fn test_cell_clear_contents_with_value() {
 }

 #[test]
-fn test_cell_clear_contents_referenced_elsewhere() {
+fn test_set_cell_empty_referenced_elsewhere() {
    let mut model = new_empty_model();
    model._set("A1", "35");
    model._set("A2", "=2*A1");
@@ -47,7 +47,7 @@ fn test_cell_clear_contents_referenced_elsewhere() {
    assert_eq!(model.is_empty_cell(0, 1, 1), Ok(false));
    assert_eq!(model.is_empty_cell(0, 2, 1), Ok(false));

-    model.cell_clear_contents(0, 1, 1).unwrap();
+    model.set_cell_empty(0, 1, 1).unwrap();
    model.evaluate();

    assert_eq!(model._get_text_at(0, 1, 1), "");
--- a/base/src/test/test_sheet_markup.rs
+++ b/base/src/test/test_sheet_markup.rs
@@ -21,7 +21,7 @@ fn test_sheet_markup() {
    model.set_cell_style(0, 4, 1, &style).unwrap();

    assert_eq!(
-        model.get_sheet_markup(0),
+        model.sheet_markup(0),
        Ok("**Item**|**Cost**\nRent|$600\nElectricity|$200\n**Total**|=SUM(B2:B3)".to_string()),
    )
 }
--- a/base/src/test/test_sheets.rs
+++ b/base/src/test/test_sheets.rs
@@ -236,11 +236,3 @@ fn test_delete_sheet_by_index() {
    assert_eq!(model.workbook.get_worksheet_names(), ["Sheet2"]);
    assert_eq!(model._get_text("Sheet2!A1"), "#REF!");
 }
-
-#[test]
-fn delete_sheet_error() {
-    let mut model = new_empty_model();
-    model.new_sheet();
-    assert!(model.delete_sheet(2).is_err());
-    assert!(model.delete_sheet(1).is_ok());
-}
--- a/base/src/test/test_shift_cells.rs
+++ b/base/src/test/test_shift_cells.rs
@@ -1,110 +0,0 @@
-#![allow(clippy::unwrap_used)]
-
-use crate::test::util::new_empty_model;
-
-#[test]
-fn shift_cells_right() {
-    let mut model = new_empty_model();
-    let (sheet, row, column) = (0, 5, 3); // C5
-    model.set_user_input(sheet, row, column, "Hi".to_string());
-    model.set_user_input(sheet, row, column + 1, "world".to_string());
-    model.set_user_input(sheet, row, column + 2, "!".to_string());
-
-    model
-        .insert_cells_and_shift_right(sheet, row, column, 1, 1)
-        .unwrap();
-    model.evaluate();
-
-    assert_eq!(model.get_cell_content(0, 5, 3), Ok("".to_string()));
-    assert_eq!(model.get_cell_content(0, 5, 4), Ok("Hi".to_string()));
-}
-
-#[test]
-fn shift_cells_right_with_formulas() {
-    let mut model = new_empty_model();
-    let (sheet, row, column) = (0, 5, 3); // C5
-    model.set_user_input(sheet, row, column - 1, "23".to_string());
-    model.set_user_input(sheet, row, column, "42".to_string());
-    model.set_user_input(sheet, row, column + 1, "=C5*2".to_string());
-    model.set_user_input(sheet, row, column + 2, "=A5+2".to_string());
-    model.set_user_input(sheet, 20, 3, "=C5*A2".to_string());
-    model.evaluate();
-
-    model
-        .insert_cells_and_shift_right(sheet, row, column, 1, 1)
-        .unwrap();
-
-    model.evaluate();
-    assert_eq!(
-        model.get_cell_content(0, row, column - 1),
-        Ok("23".to_string())
-    );
-    assert_eq!(model.get_cell_content(0, row, column), Ok("".to_string()));
-    assert_eq!(
-        model.get_cell_content(0, row, column + 1),
-        Ok("42".to_string())
-    );
-    assert_eq!(
-        model.get_cell_content(0, row, column + 2),
-        Ok("=D5*2".to_string())
-    );
-    assert_eq!(
-        model.get_cell_content(0, row, column + 3),
-        Ok("=A5+2".to_string())
-    );
-    assert_eq!(model.get_cell_content(0, 20, 3), Ok("=D5*A2".to_string()));
-}
-
-#[test]
-fn shift_cells_left() {
-    let mut model = new_empty_model();
-    let (sheet, row, column) = (0, 5, 10); // J5
-    model.set_user_input(sheet, row, column - 1, "23".to_string());
-    model.set_user_input(sheet, row, column, "42".to_string());
-    model.set_user_input(sheet, row, column + 1, "Hi".to_string());
-    model.set_user_input(sheet, row, column + 2, "honey!".to_string());
-    model.evaluate();
-
-    model
-        .delete_cells_and_shift_left(sheet, row, column, 1, 1)
-        .unwrap();
-
-    model.evaluate();
-    assert_eq!(
-        model.get_cell_content(0, row, column - 1),
-        Ok("23".to_string())
-    );
-
-    assert_eq!(model.get_cell_content(0, row, column), Ok("Hi".to_string()));
-    assert_eq!(
-        model.get_cell_content(0, row, column + 1),
-        Ok("honey!".to_string())
-    );
-}
-
-#[test]
-fn shift_cells_left_with_formulas() {
-    let mut model = new_empty_model();
-    let (sheet, row, column) = (0, 5, 10); // J5
-    model.set_user_input(sheet, row, column - 1, "23".to_string());
-    model.set_user_input(sheet, row, column, "42".to_string());
-    model.set_user_input(sheet, row, column + 1, "33".to_string());
-    model.set_user_input(sheet, row, column + 2, "=K5*A5".to_string());
-
-    model.set_user_input(sheet, row, column + 20, "=K5*A5".to_string());
-    model.evaluate();
-
-    model
-        .delete_cells_and_shift_left(sheet, row, column, 1, 1)
-        .unwrap();
-
-    model.evaluate();
-    assert_eq!(
-        model.get_cell_content(0, row, column + 1),
-        Ok("=J5*A5".to_string())
-    );
-    assert_eq!(
-        model.get_cell_content(0, row, column + 19),
-        Ok("=J5*A5".to_string())
-    );
-}
--- a/base/src/test/test_types.rs
+++ b/base/src/test/test_types.rs
@@ -1,24 +0,0 @@
-#![allow(clippy::unwrap_used)]
-
-use crate::types::{Alignment, HorizontalAlignment, VerticalAlignment};
-
-#[test]
-fn alignment_default() {
-    let alignment = Alignment::default();
-    assert_eq!(
-        alignment,
-        Alignment {
-            horizontal: HorizontalAlignment::General,
-            vertical: VerticalAlignment::Bottom,
-            wrap_text: false
-        }
-    );
-
-    let s = serde_json::to_string(&alignment).unwrap();
-    // defaults stringifies as an empty object
-    assert_eq!(s, "{}");
-
-    let a: Alignment = serde_json::from_str("{}").unwrap();
-
-    assert_eq!(a, alignment)
-}
--- a/base/src/test/test_workbook.rs
+++ b/base/src/test/test_workbook.rs
@@ -1,14 +1,14 @@
 #![allow(clippy::unwrap_used)]

-use crate::{test::util::new_empty_model, types::SheetProperties};
+use crate::{test::util::new_empty_model, types::SheetInfo};

 #[test]
 fn workbook_worksheets_info() {
    let model = new_empty_model();
-    let sheets_info = model.get_worksheets_properties();
+    let sheets_info = model.workbook.get_worksheets_info();
    assert_eq!(
        sheets_info[0],
-        SheetProperties {
+        SheetInfo {
            name: "Sheet1".to_string(),
            state: "visible".to_string(),
            sheet_id: 1,
--- a/base/src/test/test_worksheet.rs
+++ b/base/src/test/test_worksheet.rs
@@ -10,7 +10,7 @@ use crate::{
 fn test_worksheet_dimension_empty_sheet() {
    let model = new_empty_model();
    assert_eq!(
-        model.workbook.worksheet(0).unwrap().get_dimension(),
+        model.workbook.worksheet(0).unwrap().dimension(),
        WorksheetDimension {
            min_row: 1,
            min_column: 1,
@@ -25,7 +25,7 @@ fn test_worksheet_dimension_single_cell() {
    let mut model = new_empty_model();
    model._set("W11", "1");
    assert_eq!(
-        model.workbook.worksheet(0).unwrap().get_dimension(),
+        model.workbook.worksheet(0).unwrap().dimension(),
        WorksheetDimension {
            min_row: 11,
            min_column: 23,
@@ -39,9 +39,9 @@ fn test_worksheet_dimension_single_cell() {
 fn test_worksheet_dimension_single_cell_set_empty() {
    let mut model = new_empty_model();
    model._set("W11", "1");
-    model.cell_clear_contents(0, 11, 23).unwrap();
+    model.set_cell_empty(0, 11, 23).unwrap();
    assert_eq!(
-        model.workbook.worksheet(0).unwrap().get_dimension(),
+        model.workbook.worksheet(0).unwrap().dimension(),
        WorksheetDimension {
            min_row: 11,
            min_column: 23,
@@ -55,9 +55,9 @@ fn test_worksheet_dimension_single_cell_set_empty() {
 fn test_worksheet_dimension_single_cell_deleted() {
    let mut model = new_empty_model();
    model._set("W11", "1");
-    model.cell_clear_all(0, 11, 23).unwrap();
+    model.delete_cell(0, 11, 23).unwrap();
    assert_eq!(
-        model.workbook.worksheet(0).unwrap().get_dimension(),
+        model.workbook.worksheet(0).unwrap().dimension(),
        WorksheetDimension {
            min_row: 1,
            min_column: 1,
@@ -75,9 +75,9 @@ fn test_worksheet_dimension_multiple_cells() {
    model._set("AA17", "1");
    model._set("G17", "1");
    model._set("B19", "1");
-    model.cell_clear_all(0, 11, 23).unwrap();
+    model.delete_cell(0, 11, 23).unwrap();
    assert_eq!(
-        model.workbook.worksheet(0).unwrap().get_dimension(),
+        model.workbook.worksheet(0).unwrap().dimension(),
        WorksheetDimension {
            min_row: 11,
            min_column: 2,
@@ -91,7 +91,7 @@ fn test_worksheet_dimension_multiple_cells() {
 fn test_worksheet_dimension_progressive() {
    let mut model = new_empty_model();
    assert_eq!(
-        model.workbook.worksheet(0).unwrap().get_dimension(),
+        model.workbook.worksheet(0).unwrap().dimension(),
        WorksheetDimension {
            min_row: 1,
            min_column: 1,
@@ -102,7 +102,7 @@ fn test_worksheet_dimension_progressive() {

    model.set_user_input(0, 30, 50, "Hello World".to_string());
    assert_eq!(
-        model.workbook.worksheet(0).unwrap().get_dimension(),
+        model.workbook.worksheet(0).unwrap().dimension(),
        WorksheetDimension {
            min_row: 30,
            min_column: 50,
@@ -113,7 +113,7 @@ fn test_worksheet_dimension_progressive() {

    model.set_user_input(0, 10, 15, "Hello World".to_string());
    assert_eq!(
-        model.workbook.worksheet(0).unwrap().get_dimension(),
+        model.workbook.worksheet(0).unwrap().dimension(),
        WorksheetDimension {
            min_row: 10,
            min_column: 15,
@@ -124,7 +124,7 @@ fn test_worksheet_dimension_progressive() {

    model.set_user_input(0, 5, 25, "Hello World".to_string());
    assert_eq!(
-        model.workbook.worksheet(0).unwrap().get_dimension(),
+        model.workbook.worksheet(0).unwrap().dimension(),
        WorksheetDimension {
            min_row: 5,
            min_column: 15,
@@ -135,7 +135,7 @@ fn test_worksheet_dimension_progressive() {

    model.set_user_input(0, 10, 250, "Hello World".to_string());
    assert_eq!(
-        model.workbook.worksheet(0).unwrap().get_dimension(),
+        model.workbook.worksheet(0).unwrap().dimension(),
        WorksheetDimension {
            min_row: 5,
            min_column: 15,
--- a/base/src/test/user_model/mod.rs
+++ b/base/src/test/user_model/mod.rs
@@ -1,11 +0,0 @@
-mod test_add_delete_sheets;
-mod test_clear_cells;
-mod test_diff_queue;
-mod test_evaluation;
-mod test_general;
-mod test_rename_sheet;
-mod test_row_column;
-mod test_shift_cells;
-mod test_styles;
-mod test_to_from_bytes;
-mod test_undo_redo;
--- a/base/src/test/user_model/test_add_delete_sheets.rs
+++ b/base/src/test/user_model/test_add_delete_sheets.rs
@@ -1,84 +0,0 @@
-#![allow(clippy::unwrap_used)]
-
-use crate::{constants::DEFAULT_COLUMN_WIDTH, UserModel};
-
-#[test]
-fn add_undo_redo() {
-    let mut model = UserModel::new_empty("model", "en", "UTC").unwrap();
-    model.new_sheet();
-    model.set_user_input(1, 1, 1, "=1 + 1").unwrap();
-    model.set_user_input(1, 1, 2, "=A1*3").unwrap();
-    model
-        .set_column_width(1, 5, 5.0 * DEFAULT_COLUMN_WIDTH)
-        .unwrap();
-    model.new_sheet();
-    model.set_user_input(2, 1, 1, "=Sheet2!B1").unwrap();
-
-    model.undo().unwrap();
-    model.undo().unwrap();
-
-    assert!(model.get_formatted_cell_value(2, 1, 1).is_err());
-
-    model.redo().unwrap();
-    model.redo().unwrap();
-
-    assert_eq!(model.get_formatted_cell_value(2, 1, 1), Ok("6".to_string()));
-
-    model.delete_sheet(1).unwrap();
-
-    assert!(!model.can_undo());
-    assert!(!model.can_redo());
-}
-
-#[test]
-fn set_sheet_color() {
-    let mut model = UserModel::new_empty("model", "en", "UTC").unwrap();
-    model.set_sheet_color(0, "#343434").unwrap();
-    let worksheets_properties = model.get_worksheets_properties();
-    assert_eq!(worksheets_properties.len(), 1);
-    assert_eq!(worksheets_properties[0].color, Some("#343434".to_owned()));
-    model.undo().unwrap();
-    assert_eq!(model.get_worksheets_properties()[0].color, None);
-
-    model.redo().unwrap();
-    assert_eq!(
-        model.get_worksheets_properties()[0].color,
-        Some("#343434".to_owned())
-    );
-    // changes the color if there is one
-    model.set_sheet_color(0, "#2534FF").unwrap();
-    assert_eq!(
-        model.get_worksheets_properties()[0].color,
-        Some("#2534FF".to_owned())
-    );
-    // Setting it back to none
-    model.set_sheet_color(0, "").unwrap();
-    assert_eq!(model.get_worksheets_properties()[0].color, None);
-}
-
-#[test]
-fn new_sheet_propagates() {
-    let mut model = UserModel::new_empty("model", "en", "UTC").unwrap();
-    model.new_sheet();
-
-    let send_queue = model.flush_send_queue();
-
-    let mut model2 = UserModel::new_empty("model", "en", "UTC").unwrap();
-    model2.apply_external_diffs(&send_queue).unwrap();
-    let worksheets_properties = model2.get_worksheets_properties();
-    assert_eq!(worksheets_properties.len(), 2);
-}
-
-#[test]
-fn delete_sheet_propagates() {
-    let mut model = UserModel::new_empty("model", "en", "UTC").unwrap();
-    model.new_sheet();
-    model.delete_sheet(0).unwrap();
-
-    let send_queue = model.flush_send_queue();
-
-    let mut model2 = UserModel::new_empty("model", "en", "UTC").unwrap();
-    model2.apply_external_diffs(&send_queue).unwrap();
-    let sheets_info = model2.get_worksheets_properties();
-    assert_eq!(sheets_info.len(), 1);
-}
--- a/base/src/test/user_model/test_clear_cells.rs
+++ b/base/src/test/user_model/test_clear_cells.rs
@@ -1,91 +0,0 @@
-#![allow(clippy::unwrap_used)]
-
-use crate::{expressions::types::Area, UserModel};
-
-#[test]
-fn basic() {
-    let mut model = UserModel::new_empty("model", "en", "UTC").unwrap();
-    model.set_user_input(0, 1, 1, "100$").unwrap();
-    model
-        .range_clear_contents(&Area {
-            sheet: 0,
-            row: 1,
-            column: 1,
-            width: 1,
-            height: 1,
-        })
-        .unwrap();
-    assert_eq!(model.get_formatted_cell_value(0, 1, 1), Ok("".to_string()));
-    model.undo().unwrap();
-    assert_eq!(
-        model.get_formatted_cell_value(0, 1, 1),
-        Ok("100$".to_string())
-    );
-    model.redo().unwrap();
-    assert_eq!(model.get_formatted_cell_value(0, 1, 1), Ok("".to_string()));
-
-    model.set_user_input(0, 1, 1, "300").unwrap();
-    // clear contents keeps the formatting
-    assert_eq!(
-        model.get_formatted_cell_value(0, 1, 1),
-        Ok("300$".to_string())
-    );
-
-    model
-        .range_clear_all(&Area {
-            sheet: 0,
-            row: 1,
-            column: 1,
-            width: 1,
-            height: 1,
-        })
-        .unwrap();
-    assert_eq!(model.get_formatted_cell_value(0, 1, 1), Ok("".to_string()));
-    model.undo().unwrap();
-    assert_eq!(
-        model.get_formatted_cell_value(0, 1, 1),
-        Ok("300$".to_string())
-    );
-    model.redo().unwrap();
-    assert_eq!(model.get_formatted_cell_value(0, 1, 1), Ok("".to_string()));
-    model.set_user_input(0, 1, 1, "400").unwrap();
-    // clear contents keeps the formatting
-    assert_eq!(
-        model.get_formatted_cell_value(0, 1, 1),
-        Ok("400".to_string())
-    );
-}
-
-#[test]
-fn clear_empty_cell() {
-    let mut model = UserModel::new_empty("model", "en", "UTC").unwrap();
-    model
-        .range_clear_contents(&Area {
-            sheet: 0,
-            row: 1,
-            column: 1,
-            width: 1,
-            height: 1,
-        })
-        .unwrap();
-    assert_eq!(model.get_formatted_cell_value(0, 1, 1), Ok("".to_string()));
-    model.undo().unwrap();
-    assert_eq!(model.get_formatted_cell_value(0, 1, 1), Ok("".to_string()));
-}
-
-#[test]
-fn clear_all_empty_cell() {
-    let mut model = UserModel::new_empty("model", "en", "UTC").unwrap();
-    model
-        .range_clear_all(&Area {
-            sheet: 0,
-            row: 1,
-            column: 1,
-            width: 1,
-            height: 1,
-        })
-        .unwrap();
-    assert_eq!(model.get_formatted_cell_value(0, 1, 1), Ok("".to_string()));
-    model.undo().unwrap();
-    assert_eq!(model.get_formatted_cell_value(0, 1, 1), Ok("".to_string()));
-}
--- a/base/src/test/user_model/test_diff_queue.rs
+++ b/base/src/test/user_model/test_diff_queue.rs
@@ -1,161 +0,0 @@
-use crate::{
-    constants::{DEFAULT_COLUMN_WIDTH, DEFAULT_ROW_HEIGHT},
-    test::util::new_empty_model,
-    UserModel,
-};
-
-#[test]
-fn send_queue() {
-    let mut model1 = UserModel::from_model(new_empty_model());
-    let width = model1.get_column_width(0, 3).unwrap() * 3.0;
-    model1.set_column_width(0, 3, width).unwrap();
-    model1.set_user_input(0, 1, 2, "Hello IronCalc!").unwrap();
-    let send_queue = model1.flush_send_queue();
-
-    let mut model2 = UserModel::from_model(new_empty_model());
-    model2.apply_external_diffs(&send_queue).unwrap();
-
-    assert_eq!(model2.get_column_width(0, 3), Ok(width));
-    assert_eq!(
-        model2.get_formatted_cell_value(0, 1, 2),
-        Ok("Hello IronCalc!".to_string())
-    );
-}
-
-#[test]
-fn apply_external_diffs_wrong_str() {
-    let mut model1 = UserModel::from_model(new_empty_model());
-    assert!(model1.apply_external_diffs("invalid".as_bytes()).is_err());
-}
-
-#[test]
-fn queue_undo_redo() {
-    let mut model1 = UserModel::from_model(new_empty_model());
-    let width = model1.get_column_width(0, 3).unwrap() * 3.0;
-    model1.set_column_width(0, 3, width).unwrap();
-    model1.set_user_input(0, 1, 2, "Hello IronCalc!").unwrap();
-    assert!(model1.undo().is_ok());
-    assert!(model1.redo().is_ok());
-    let send_queue = model1.flush_send_queue();
-
-    let mut model2 = UserModel::from_model(new_empty_model());
-    model2.apply_external_diffs(&send_queue).unwrap();
-
-    assert_eq!(model2.get_column_width(0, 3), Ok(width));
-    assert_eq!(
-        model2.get_formatted_cell_value(0, 1, 2),
-        Ok("Hello IronCalc!".to_string())
-    );
-}
-
-#[test]
-fn queue_undo_redo_multiple() {
-    let mut model1 = UserModel::from_model(new_empty_model());
-
-    // do a bunch of things
-    model1.set_frozen_columns_count(0, 5).unwrap();
-    model1.set_frozen_rows_count(0, 6).unwrap();
-    model1.set_column_width(0, 7, 300.0).unwrap();
-    model1.set_row_height(0, 23, 123.0).unwrap();
-    model1.set_user_input(0, 55, 55, "=42+8").unwrap();
-
-    for row in 1..5 {
-        model1.set_user_input(0, row, 17, "=ROW()").unwrap();
-    }
-
-    model1.insert_row(0, 3).unwrap();
-    model1.insert_row(0, 3).unwrap();
-
-    // undo al of them
-    while model1.can_undo() {
-        model1.undo().unwrap();
-    }
-
-    // check it is an empty model
-    assert_eq!(model1.get_frozen_columns_count(0), Ok(0));
-    assert_eq!(model1.get_frozen_rows_count(0), Ok(0));
-    assert_eq!(model1.get_column_width(0, 7), Ok(DEFAULT_COLUMN_WIDTH));
-    assert_eq!(
-        model1.get_formatted_cell_value(0, 55, 55),
-        Ok("".to_string())
-    );
-    assert_eq!(model1.get_row_height(0, 23), Ok(DEFAULT_ROW_HEIGHT));
-    assert_eq!(
-        model1.get_formatted_cell_value(0, 57, 55),
-        Ok("".to_string())
-    );
-    assert_eq!(model1.get_row_height(0, 25), Ok(DEFAULT_ROW_HEIGHT));
-
-    // redo all of them
-    while model1.can_redo() {
-        model1.redo().unwrap();
-    }
-
-    // now send all this to a new model
-    let send_queue = model1.flush_send_queue();
-    let mut model2 = UserModel::from_model(new_empty_model());
-    model2.apply_external_diffs(&send_queue).unwrap();
-
-    // Check everything is as expected
-    assert_eq!(model2.get_frozen_columns_count(0), Ok(5));
-    assert_eq!(model2.get_frozen_rows_count(0), Ok(6));
-    assert_eq!(model2.get_column_width(0, 7), Ok(300.0));
-    // I inserted two rows
-    assert_eq!(
-        model2.get_formatted_cell_value(0, 57, 55),
-        Ok("50".to_string())
-    );
-    assert_eq!(model2.get_row_height(0, 25), Ok(123.0));
-
-    assert_eq!(
-        model2.get_formatted_cell_value(0, 1, 17),
-        Ok("1".to_string())
-    );
-    assert_eq!(
-        model2.get_formatted_cell_value(0, 2, 17),
-        Ok("2".to_string())
-    );
-
-    assert_eq!(
-        model2.get_formatted_cell_value(0, 3, 17),
-        Ok("".to_string())
-    );
-    assert_eq!(
-        model2.get_formatted_cell_value(0, 4, 17),
-        Ok("".to_string())
-    );
-
-    assert_eq!(
-        model2.get_formatted_cell_value(0, 5, 17),
-        Ok("5".to_string())
-    );
-    assert_eq!(
-        model2.get_formatted_cell_value(0, 6, 17),
-        Ok("6".to_string())
-    );
-}
-
-#[test]
-fn new_sheet() {
-    let mut model1 = UserModel::from_model(new_empty_model());
-    model1.new_sheet();
-    model1.set_user_input(0, 1, 1, "42").unwrap();
-    model1.set_user_input(1, 1, 1, "=Sheet1!A1*2").unwrap();
-
-    let send_queue = model1.flush_send_queue();
-    let mut model2 = UserModel::from_model(new_empty_model());
-    model2.apply_external_diffs(&send_queue).unwrap();
-
-    assert_eq!(
-        model2.get_formatted_cell_value(1, 1, 1),
-        Ok("84".to_string())
-    );
-}
-
-#[test]
-fn wrong_diffs_handled() {
-    let mut model = UserModel::from_model(new_empty_model());
-    assert!(model
-        .apply_external_diffs("Hello world".as_bytes())
-        .is_err());
-}
--- a/base/src/test/user_model/test_evaluation.rs
+++ b/base/src/test/user_model/test_evaluation.rs
@@ -1,31 +0,0 @@
-#![allow(clippy::unwrap_used)]
-
-use crate::UserModel;
-
-#[test]
-fn model_evaluates_automatically() {
-    let mut model = UserModel::new_empty("model", "en", "UTC").unwrap();
-    model.set_user_input(0, 1, 1, "=1 + 1").unwrap();
-
-    assert_eq!(model.get_formatted_cell_value(0, 1, 1), Ok("2".to_string()));
-    assert_eq!(model.get_cell_content(0, 1, 1), Ok("=1+1".to_string()));
-}
-
-#[test]
-fn pause_resume_evaluation() {
-    let mut model = UserModel::new_empty("model", "en", "UTC").unwrap();
-    model.pause_evaluation();
-    model.set_user_input(0, 1, 1, "=1+1").unwrap();
-    assert_eq!(
-        model.get_formatted_cell_value(0, 1, 1),
-        Ok("#ERROR!".to_string())
-    );
-    model.evaluate();
-
-    assert_eq!(model.get_formatted_cell_value(0, 1, 1), Ok("2".to_string()));
-    assert_eq!(model.get_cell_content(0, 1, 1), Ok("=1+1".to_string()));
-
-    model.resume_evaluation();
-    model.set_user_input(0, 2, 1, "=1+4").unwrap();
-    assert_eq!(model.get_formatted_cell_value(0, 2, 1), Ok("5".to_string()));
-}
--- a/Show More
+++ b/Show More
				`@@ -1 +0,0 @@`
				`PfrendeesD<>VRAITRUEWAHRVERDADEROTVFAUXFALSEFALSCHFALSOUw#REF!#REF!#BEZUG!#¡REF!e<>#NOM?#NAME?#NAME?#¿NOMBRE?x<>#VALEUR!#VALUE!#WERT!#¡VALOR!w<>#DIV/0!#DIV/0!#DIV/0!#¡DIV/0!<04>#N/A#N/A#NV#N/AXv#NOMBRE!#NUM!#ZAHL!#¡NUM!<02><>#N/IMPL!#N/IMPL!#N/IMPL!#N/IMPL!w{#SPILL!#SPILL!#ÜBERLAUF!#SPILL!ff#CALC!#CALC!#CALC!#CALC!ff#CIRC!#CIRC!#CIRC!#CIRC!ww#ERROR!#ERROR!#ERROR!#ERROR!ff#NULL!#NULL!#NULL!#NULL!`