address egui deprecation warnings

.gitignore

@@ -4,3 +4,4 @@
 /Cargo.lock
 perf.data
 flamegraph.svg
+result

Cargo.toml

@@ -9,6 +9,9 @@ description = "Crossplatform (and web-compatible) graphing calculator"
 [lib]
 crate-type = ["cdylib", "rlib"]
 
+[features]
+default = ["eframe/wayland"]
+
 [profile.release]
 debug = false
 codegen-units = 1
@@ -33,64 +36,66 @@ strip = false
 
 [dependencies]
 parsing = { path = "./parsing" }
-eframe = { git = "https://github.com/titaniumtown/egui.git", rev = "b088efb9fa917845ecb54729a0d2fc592d2399e7", default-features = false, features = [
+eframe = { git = "https://github.com/titaniumtown/egui.git", default-features = false, features = [
     "glow",
 ] }
-egui = { git = "https://github.com/titaniumtown/egui.git", rev = "b088efb9fa917845ecb54729a0d2fc592d2399e7", default-features = false, features = [
+egui = { git = "https://github.com/titaniumtown/egui.git", default-features = false, features = [
     "serde",
 ] }
-epaint = { git = "https://github.com/titaniumtown/egui.git", rev = "b088efb9fa917845ecb54729a0d2fc592d2399e7", default-features = false , features = [
+epaint = { git = "https://github.com/titaniumtown/egui.git", default-features = false , features = [
     "bytemuck",
 ] }
-emath = { git = "https://github.com/titaniumtown/egui.git", rev = "b088efb9fa917845ecb54729a0d2fc592d2399e7", default-features = false }
-egui_plot = { git = "https://github.com/titaniumtown/egui.git", rev = "b088efb9fa917845ecb54729a0d2fc592d2399e7", default-features = false }
+emath = { git = "https://github.com/titaniumtown/egui.git", default-features = false }
+egui_plot = { version = "0.34.0", default-features = false }
 
-
-
-shadow-rs = { version = "0.12", default-features = false }
-const_format = { version = "0.2", default-features = false, features = ["fmt"] }
-cfg-if = "1"
-ruzstd = "0.5"
+ruzstd = "0.8"
 tracing = "0.1"
-itertools = "0.10"
+itertools = "0.14"
 static_assertions = "1.1"
 bincode = "1.3"
 serde = "1"
-base64 = "0.21"
+base64 = "0.22"
 
 [dev-dependencies]
 benchmarks = { path = "./benchmarks" }
 
 [build-dependencies]
-shadow-rs = "0.12"
-epaint = { git = "https://github.com/titaniumtown/egui.git", rev = "b088efb9fa917845ecb54729a0d2fc592d2399e7", default-features = false, features = [
+shadow-rs = "1.4"
+epaint = { git = "https://github.com/titaniumtown/egui.git", default-features = false, features = [
     "bytemuck",
 ] }
-egui = { git = "https://github.com/titaniumtown/egui.git", rev = "b088efb9fa917845ecb54729a0d2fc592d2399e7", default-features = false, features = [
+egui = { git = "https://github.com/titaniumtown/egui.git", default-features = false, features = [
     "serde",
 ] }
 bincode = "1.3"
 serde = "1"
 serde_json = "1"
-zstd = { version = "0.11", default-features = false, features = ["pkg-config"] }
-run_script = "0.9"
-json5 = "0.4"
-itertools = "0.10"
+zstd = { version = "0.13", default-features = false, features = ["pkg-config"] }
+itertools = "0.14"
+allsorts = "0.15"
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
-instant = "0.1"
 tracing-subscriber = "0.3"
-getrandom = { version = "0.2" }
 
 [target.'cfg(target_arch = "wasm32")'.dependencies]
-instant = { version = "0.1", features = ["wasm-bindgen"] }
-lol_alloc = "0.4.0"
+lol_alloc = "0.4.1"
 wasm-bindgen = { version = "0.2", default-features = false, features = ["std"] }
 web-sys = "0.3"
 tracing-wasm = "0.2"
-getrandom = { version = "0.2", features = ["js"] }
 # pinned to 0.4.54 in order to be compatible with nixos's wasm-bindgen-cli version
 wasm-bindgen-futures = "=0.4.54"
 
 [package.metadata.cargo-all-features]
 skip_optional_dependencies = true #don't test optional dependencies, only features
+
+# various dependency patches fix issues with nix complication such as:
+# ````
+# ln: failed to create symbolic link '/nix/store/plh3y4gfxgwcacjccv72f551y1k89x75-cargo-vendor-dir/ecolor-0.33.2/qb43vsx43av6kf4h9y4bsmisvbjlcxd1-ecolor-0.33.2': Permission denied
+# ````
+
+[patch.crates-io]
+egui = { git = "https://github.com/titaniumtown/egui.git" }
+eframe = { git = "https://github.com/titaniumtown/egui.git" }
+epaint = { git = "https://github.com/titaniumtown/egui.git" }
+emath = { git = "https://github.com/titaniumtown/egui.git" }
+ecolor = { git = "https://github.com/titaniumtown/egui.git" }

TODO.md

@@ -1,18 +1,20 @@
 ## TODO:
 1. Function management
-	- Integrals between functions (too hard to implement, maybe will shelve)
-	- Display intersection between functions (would have to rewrite a lot of the function plotting handling)
-	- [Drag and drop support](https://github.com/emilk/egui/discussions/1530) in the UI to re-order functions
-	- Hide/disable functions
-	- Prevent user from making too many function entries
-	- Display function errors as tooltips or a warning box (not preventing the display of the graph)
-	- Clone functions
+	a. Integrals between functions (too hard to implement, maybe will shelve)
+	b. Display intersection between functions (would have to rewrite a lot of the function plotting handling)
+	c. [Drag and drop support](https://github.com/emilk/egui/discussions/1530) in the UI to re-order functions
+	d. Hide/disable functions
+	e. Prevent user from making too many function entries
+	f. Display function errors as tooltips or a warning box (not preventing the display of the graph)
+	g. Clone functions
 2. Smart display of graph
 	- Display of intersections between functions
 3. Allow constants in min/max integral input (like pi or euler's number)
 4. Sliding values for functions (like a user-interactable slider that adjusts a variable in the function, like desmos)
 5. Fix integral display
 6. Better handling of roots and extrema finding
+	a. For instance, persistance, the roots shouldn't be recalculated for each movement of the viewport
+	b. If applicable, the roots/extrema should be expressed in terms of constants such as a root of a number, pi, or something else.
 7. Add closing animation for function entry
 8. Fix mobile text input
 9. Write custom plotter

build.rs

@@ -1,79 +1,73 @@
+use allsorts::{
+    binary::read::ReadScope,
+    font::{Font, MatchingPresentation},
+    font_data::FontData as AllsortsFontData,
+    subset::subset,
+    tag,
+};
+use epaint::{
+    FontFamily,
+    text::{FontData, FontDefinitions, FontTweak},
+};
 use std::{
     collections::BTreeMap,
     env,
     fs::File,
     io::{BufWriter, Write},
     path::Path,
+    sync::Arc,
 };
 
-use epaint::{
-    FontFamily,
-    text::{FontData, FontDefinitions, FontTweak},
-};
-
-use run_script::ScriptOptions;
-
 include!(concat!(
     env!("CARGO_MANIFEST_DIR"),
     "/src/unicode_helper.rs"
 ));
 
 fn font_stripper(from: &str, out: &str, unicodes: Vec<char>) -> Result<Vec<u8>, String> {
-    let unicodes: Vec<String> = unicodes.iter().map(|c| to_unicode_hash(*c)).collect();
+    let font_path = format!("{}/assets/{}", env!("CARGO_MANIFEST_DIR"), from);
+    let font_data = std::fs::read(&font_path).map_err(|e| e.to_string())?;
+    let scope = ReadScope::new(&font_data);
+    let font_file = scope
+        .read::<AllsortsFontData>()
+        .map_err(|e| format!("Failed to read font data: {}", e))?;
+    let provider = font_file
+        .table_provider(0)
+        .map_err(|e| format!("Failed to get table provider: {}", e))?;
+    let mut font = Font::new(provider).map_err(|e| format!("Failed to create font: {:?}", e))?;
+
+    let mut glyph_ids = Vec::new();
+    for &ch in &unicodes {
+        let mut glyph_ids_curr = font
+            .map_glyphs(
+                &ch.to_string(),
+                tag::LATN,
+                MatchingPresentation::NotRequired,
+            )
+            .into_iter()
+            .map(|glyph| glyph.glyph_index)
+            .collect();
+
+        glyph_ids.append(&mut glyph_ids_curr);
+    }
+    // Include .notdef glyph
+    glyph_ids.push(0);
+    glyph_ids.sort();
+    glyph_ids.dedup();
+
+    let subset_data = subset(&font.font_table_provider, &glyph_ids)
+        .map_err(|e| format!("Failed to subset font: {}", e))?;
 
     let new_path = [&env::var("OUT_DIR").unwrap(), out].concat();
-    let unicodes_formatted = unicodes
-        .iter()
-        .map(|u| format!("U+{}", u))
-        .collect::<Vec<String>>()
-        .join(",");
+    std::fs::write(&new_path, &subset_data)
+        .map_err(|e| format!("Failed to write subset font: {}", e))?;
 
-    // Test to see if pyftsubset is found
-    let pyftsubset_detect = run_script::run("whereis pyftsubset", &(vec![]), &ScriptOptions::new());
-    match pyftsubset_detect {
-        Ok((_i, s1, _s2)) => {
-            if s1 == "pyftsubset: " {
-                return Err(String::from("pyftsubset not found"));
-            }
-        }
-        // It was not, return an error and abort
-        Err(x) => return Err(x.to_string()),
-    }
-
-    let script_result = run_script::run(
-        &format!(
-            "pyftsubset {}/assets/{} --unicodes={}
-			mv {}/assets/{} {}",
-            env!("CARGO_MANIFEST_DIR"),
-            from,
-            unicodes_formatted,
-            env!("CARGO_MANIFEST_DIR"),
-            from.replace(".ttf", ".subset.ttf"),
-            new_path
-        ),
-        &(vec![]),
-        &ScriptOptions::new(),
-    );
-
-    if let Ok((_, _, error)) = script_result {
-        if error.is_empty() {
-            return Ok(std::fs::read(new_path).unwrap());
-        } else {
-            return Err(error);
-        }
-    } else if let Err(error) = script_result {
-        return Err(error.to_string());
-    }
-    unreachable!()
+    Ok(subset_data)
 }
 
 fn main() {
-    // rebuild if new commit or contents of `assets` folder changed
-    println!("cargo:rerun-if-changed=.git/logs/HEAD");
+    // rebuild if contents of `assets` folder changed
     println!("cargo:rerun-if-changed=assets/*");
 
-    shadow_rs::new().expect("Could not initialize shadow_rs");
-
     let mut main_chars: Vec<char> =
 		b"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzsu0123456789?.,!(){}[]-_=+-/<>'\\ :^*`@#$%&|~;"
 			.iter()
@@ -104,38 +98,39 @@ fn main() {
         font_data: BTreeMap::from([
             (
                 "Ubuntu-Light".to_owned(),
-                FontData::from_owned(
+                Arc::new(FontData::from_owned(
                     font_stripper(
                         "Ubuntu-Light.ttf",
                         "ubuntu-light.ttf",
                         [main_chars, vec!['∫']].concat(),
                     )
                     .unwrap(),
-                ),
+                )),
             ),
             (
                 "NotoEmoji-Regular".to_owned(),
-                FontData::from_owned(
+                Arc::new(FontData::from_owned(
                     font_stripper(
                         "NotoEmoji-Regular.ttf",
                         "noto-emoji.ttf",
                         vec!['🌞', '🌙', '✖'],
                     )
                     .unwrap(),
-                ),
+                )),
             ),
             (
                 "emoji-icon-font".to_owned(),
+                Arc::new(
                     FontData::from_owned(
                         font_stripper("emoji-icon-font.ttf", "emoji-icon.ttf", vec!['⚙']).unwrap(),
                     )
                     .tweak(FontTweak {
                         scale: 0.8,
                         y_offset_factor: 0.07,
-                    y_offset: 0.0,
-                    baseline_offset_factor: -0.0333,
+                        y_offset: -0.0333,
                     }),
                 ),
+            ),
         ]),
         families: BTreeMap::from([
             (

flake.nix

@@ -1,5 +1,5 @@
 {
-  description = "YTBN Graphing Software - Web-compatible graphing calculator";
+  description = "YTBN Graphing Software";
 
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
@@ -40,12 +40,12 @@
           pname = "ytbn-graphing-software-wasm";
           version = "0.1.0";
 
-          src = "${./.}";
+          src = ./.;
 
           cargoLock = {
             lockFile = ./Cargo.lock;
             outputHashes = {
-              "ecolor-0.25.0" = "sha256-9s5LCngwvIIL43txT6sBs4JlRXqmYt1Kw8hlDnwx+DI=";
+              "ecolor-0.33.2" = "sha256-jdQK55yKZptadwosrJXIhoQDGNeELQmPExWRsGc0VG0=";
             };
           };
 
@@ -60,11 +60,30 @@
             zstd
           ];
 
+          # Run all tests on native target before building wasm
+          # Note: Tests run without --release because the release profile uses
+          # panic=abort which is incompatible with the test harness.
+          checkPhase =
+            let
+              libPath = pkgs.lib.makeLibraryPath (
+                with pkgs;
+                [
+                  libxkbcommon
+                  libGL
+                  wayland
+                ]
+              );
+            in
+            ''
+              runHook preCheck
+              export LD_LIBRARY_PATH="${libPath}:$LD_LIBRARY_PATH"
+              cargo test --workspace
+              runHook postCheck
+            '';
+
           buildPhase = ''
             runHook preBuild
 
-            export HOME=$TMPDIR
-
             cargo build \
               --release \
               --lib \
@@ -80,7 +99,7 @@
             runHook postInstall
           '';
 
-          doCheck = false;
+          doCheck = true;
         };
 
         # Final web package with wasm-bindgen processing
@@ -107,7 +126,7 @@
 
             # Optimize wasm (enable features used by modern rust wasm targets)
             wasm-opt out/ytbn_graphing_software_bg.wasm \
-              -O2 --fast-math \
+              -Oz \
               --enable-bulk-memory \
               --enable-nontrapping-float-to-int \
               --enable-sign-ext \
@@ -136,13 +155,6 @@
 
             runHook postInstall
           '';
-
-          meta = with pkgs.lib; {
-            description = "Web-compatible graphing calculator similar to Desmos";
-            homepage = "https://github.com/Titaniumtown/YTBN-Graphing-Software";
-            license = licenses.agpl3Only;
-            platforms = platforms.all;
-          };
         };
       in
       {
@@ -157,7 +169,6 @@
             rustToolchain
             wasm-bindgen-cli
             binaryen
-            python3Packages.fonttools
             rust-analyzer
             pkg-config
             clang
@@ -166,9 +177,6 @@
             libxkbcommon
             libGL
             wayland
-            xorg.libX11
-            xorg.libXcursor
-            xorg.libXi
           ];
 
           buildInputs = with pkgs; [
@@ -182,9 +190,6 @@
               libxkbcommon
               libGL
               wayland
-              xorg.libX11
-              xorg.libXcursor
-              xorg.libXi
             ]
           );
         };

parsing/Cargo.toml

@@ -10,11 +10,11 @@ description = "Parsing library for YTBN-Graphing-Software"
 [lib]
 
 [dependencies]
-phf = { version = "0.11" }
-exmex = {version = "0.17.5", features = ["partial"]}
+phf = { version = "0.13" }
+exmex = {version = "0.20.5", features = ["partial"]}
 
 [build-dependencies]
-phf_codegen = { version = "0.11" }
+phf_codegen = { version = "0.13" }
 
 [package.metadata.cargo-all-features]
 skip_optional_dependencies = true #don't test optional dependencies, only features

parsing/src/autocomplete_hashmap.rs

@@ -64,7 +64,8 @@ pub fn compile_hashmap(data: Vec<String>) -> Vec<(String, String)> {
 /// Returns a vector of all possible splitting combinations of a strings
 #[allow(dead_code)]
 fn all_possible_splits(
-	func: String, seen: &mut HashSet<(String, String)>,
+    func: String,
+    seen: &mut HashSet<(String, String)>,
 ) -> Vec<(String, String)> {
     (1..func.len())
         .map(|i| {

parsing/src/parsing.rs

@@ -4,21 +4,14 @@ use std::collections::HashMap;
 #[derive(Clone, PartialEq)]
 pub struct FlatExWrapper {
     func: Option<FlatEx<f64>>,
-	func_str: Option<String>,
 }
 
 impl FlatExWrapper {
-	const EMPTY: FlatExWrapper = FlatExWrapper {
-		func: None,
-		func_str: None,
-	};
+    const EMPTY: FlatExWrapper = FlatExWrapper { func: None };
 
     #[inline]
     const fn new(f: FlatEx<f64>) -> Self {
-		Self {
-			func: Some(f),
-			func_str: None,
-		}
+        Self { func: Some(f) }
     }
 
     #[inline]
@@ -34,33 +27,13 @@ impl FlatExWrapper {
             .unwrap_or(f64::NAN)
     }
 
-	#[inline]
-	fn partial(&self, x: usize) -> Self {
-		self.func
-			.as_ref()
-			.map(|f| f.clone().partial(x).map(Self::new).unwrap_or(Self::EMPTY))
-			.unwrap_or(Self::EMPTY)
-	}
-
-	#[inline]
-	fn get_string(&mut self) -> String {
-		match self.func_str {
-			Some(ref func_str) => func_str.clone(),
-			None => {
-				let calculated = self.func.as_ref().map(|f| f.unparse()).unwrap_or("");
-				self.func_str = Some(calculated.to_owned());
-				calculated.to_owned()
-			}
-		}
-	}
-
     #[inline]
     fn partial_iter(&self, n: usize) -> Self {
         self.func
             .as_ref()
             .map(|f| {
                 f.clone()
-					.partial_iter((0..=n).map(|_| 0))
+                    .partial_iter((0..n).map(|_| 0))
                     .map(Self::new)
                     .unwrap_or(Self::EMPTY)
             })
@@ -165,18 +138,6 @@ impl BackingFunction {
     }
 }
 
-fn prettyify_function_str(func: &str) -> String {
-	let new_str = func.replace("{x}", "x");
-
-	if &new_str == "0/0" {
-		"Undefined".to_owned()
-	} else {
-		new_str
-	}
-}
-
-// pub const VALID_VARIABLES: [char; 3] = ['x', 'e', 'π'];
-
 /// Case insensitive checks for if `c` is a character used to represent a variable
 #[inline]
 pub const fn is_variable(c: &char) -> bool {

parsing/src/splitting.rs

@@ -1,17 +1,61 @@
 use crate::parsing::is_variable;
+use crate::SUPPORTED_FUNCTIONS;
+
+/// Protect function names that start with variable characters (like 'e' in 'exp')
+/// by replacing them with a placeholder during parsing, then restoring them after.
+/// This prevents incorrect splitting like "exp" -> "e" * "xp".
+fn protect_function_names(input: &str) -> (String, Vec<(&'static str, String)>) {
+    let mut result = input.to_string();
+    let mut replacements = Vec::new();
+
+    // Only protect functions that start with a variable character
+    // Sort by length descending to replace longer matches first (e.g., "exp" before "e")
+    let mut funcs: Vec<&'static str> = SUPPORTED_FUNCTIONS
+        .iter()
+        .filter(|&&func| {
+            func.chars()
+                .next()
+                .map(|c| is_variable(&c))
+                .unwrap_or(false)
+        })
+        .copied()
+        .collect();
+    funcs.sort_by(|a, b| b.len().cmp(&a.len()));
+
+    for func in funcs {
+        // Use a placeholder made of letters that will be treated as a function name
+        // The placeholder won't be split because it's all letters
+        let placeholder = format!("zzzfn{}", replacements.len());
+        result = result.replace(func, &placeholder);
+        replacements.push((func, placeholder));
+    }
+
+    (result, replacements)
+}
+
+/// Restore protected function names from their placeholders
+fn restore_function_names(input: &str, replacements: &[(&'static str, String)]) -> String {
+    let mut result = input.to_string();
+    for (func, placeholder) in replacements {
+        result = result.replace(placeholder, func);
+    }
+    result
+}
 
 pub fn split_function(input: &str, split: SplitType) -> Vec<String> {
+    // Protect function names that could be incorrectly split
+    let (protected, replacements) = protect_function_names(input);
+
     split_function_chars(
-		&input
+        &protected
             .replace("pi", "π") // replace "pi" text with pi symbol
             .replace("**", "^") // support alternate manner of expressing exponents
-			.replace("exp", "\u{1fc93}") // stop-gap solution to fix the `exp` function
             .chars()
             .collect::<Vec<char>>(),
         split,
     )
     .iter()
-	.map(|x| x.replace('\u{1fc93}', "exp")) // Convert back to `exp` text
+    .map(|x| restore_function_names(x, &replacements))
     .collect::<Vec<String>>()
 }
 
@@ -54,50 +98,81 @@ impl BoolSlice {
         }
     }
 
-	const fn is_unmasked_variable(&self) -> bool { self.variable && !self.masked_var }
+    const fn is_unmasked_variable(&self) -> bool {
+        self.variable && !self.masked_var
+    }
 
-	const fn is_unmasked_number(&self) -> bool { self.number && !self.masked_num }
+    const fn is_unmasked_number(&self) -> bool {
+        self.number && !self.masked_num
+    }
+
+    /// Returns true if this char is a function name letter (not a standalone variable)
+    const fn is_function_letter(&self) -> bool {
+        self.letter && !self.is_unmasked_variable()
+    }
+
+    /// Returns true if this is a "term" - something that can be multiplied
+    const fn is_term(&self) -> bool {
+        self.is_unmasked_number() || self.is_unmasked_variable() || self.letter
+    }
 
     const fn calculate_mask(&mut self, other: &BoolSlice) {
         if other.masked_num && self.number {
-			// If previous char was a masked number, and current char is a number, mask current char's variable status
+            // Propagate number masking through consecutive digits
             self.masked_num = true;
         } else if other.masked_var && self.variable {
-			// If previous char was a masked variable, and current char is a variable, mask current char's variable status
+            // Propagate variable masking through consecutive variables
             self.masked_var = true;
-		} else if other.letter && !other.is_unmasked_variable() {
+        } else if other.is_function_letter() {
+            // After a function letter, mask following numbers/variables as part of function name
             self.masked_num = self.number;
             self.masked_var = self.variable;
         }
     }
 
-	const fn splitable(&self, c: &char, other: &BoolSlice, split: &SplitType) -> bool {
-		if (*c == '*') | (matches!(split, &SplitType::Term) && other.open_parens) {
-			true
-		} else if other.closing_parens {
-			// Cases like `)x`, `)2`, and `)(`
-			return (*c == '(')
-				| (self.letter && !self.is_unmasked_variable())
-				| self.is_unmasked_variable()
-				| self.is_unmasked_number();
-		} else if *c == '(' {
-			// Cases like `x(` and `2(`
-			return (other.is_unmasked_variable() | other.is_unmasked_number()) && !other.letter;
-		} else if other.is_unmasked_number() {
-			// Cases like `2x` and `2sin(x)`
-			return self.is_unmasked_variable() | self.letter;
-		} else if self.is_unmasked_variable() | self.letter {
-			// Cases like `e2` and `xx`
-			return other.is_unmasked_number()
-				| (other.is_unmasked_variable() && self.is_unmasked_variable())
-				| other.is_unmasked_variable();
-		} else if (self.is_unmasked_number() | self.letter | self.is_unmasked_variable())
-			&& (other.is_unmasked_number() | other.letter)
-		{
+    /// Determines if we should split (insert implicit multiplication) before current char
+    const fn splitable(&self, c: &char, prev: &BoolSlice, split: &SplitType) -> bool {
+        // Always split on explicit multiplication
+        if *c == '*' {
             return true;
-		} else {
-			return self.is_unmasked_number() && other.is_unmasked_variable();
         }
+
+        // For Term split type, also split after open parens
+        if matches!(split, &SplitType::Term) && prev.open_parens {
+            return true;
+        }
+
+        // After closing paren: split before `(`, letters, variables, or numbers
+        // e.g., `)x`, `)2`, `)(`, `)sin`
+        if prev.closing_parens {
+            return *c == '(' || self.is_term();
+        }
+
+        // Before open paren: split if previous was a standalone number or variable
+        // e.g., `x(`, `2(` but not `sin(`
+        if *c == '(' {
+            return (prev.is_unmasked_variable() || prev.is_unmasked_number()) && !prev.letter;
+        }
+
+        // After a number: split before variables or function letters
+        // e.g., `2x`, `2sin`
+        if prev.is_unmasked_number() {
+            return self.is_unmasked_variable() || self.letter;
+        }
+
+        // Current is a variable or letter: split if previous was a number or variable
+        // e.g., `e2`, `xx`, `xe`
+        if self.is_unmasked_variable() || self.letter {
+            return prev.is_unmasked_number() || prev.is_unmasked_variable();
+        }
+
+        // Current is a number after a variable
+        // e.g., `x2`
+        if self.is_unmasked_number() && prev.is_unmasked_variable() {
+            return true;
+        }
+
+        false
     }
 }
 
@@ -201,4 +276,13 @@ fn split_function_test() {
         &["2", "sin(π) + 2", "cos(tau)"],
         SplitType::Multiplication,
     );
+
+    // Test that exp() function is properly handled (not split into e*xp)
+    assert_test("exp(x)", &["exp(x)"], SplitType::Multiplication);
+    assert_test("2exp(x)", &["2", "exp(x)"], SplitType::Multiplication);
+    assert_test(
+        "exp(x)sin(x)",
+        &["exp(x)", "sin(x)"],
+        SplitType::Multiplication,
+    );
 }

parsing/src/suggestions.rs

@@ -87,15 +87,21 @@ impl<'a> std::fmt::Debug for Hint<'a> {
 
 impl<'a> Hint<'a> {
     #[inline]
-	pub const fn is_none(&self) -> bool { matches!(&self, &Hint::None) }
+    pub const fn is_none(&self) -> bool {
+        matches!(&self, &Hint::None)
+    }
 
     #[inline]
     #[allow(dead_code)]
-	pub const fn is_some(&self) -> bool { !self.is_none() }
+    pub const fn is_some(&self) -> bool {
+        !self.is_none()
+    }
 
     #[inline]
     #[allow(dead_code)]
-	pub const fn is_single(&self) -> bool { matches!(&self, &Hint::Single(_)) }
+    pub const fn is_single(&self) -> bool {
+        matches!(&self, &Hint::Single(_))
+    }
 
     #[inline]
     #[allow(dead_code)]

shell.nix

@@ -1,30 +0,0 @@
-{
-  pkgs ? import <nixpkgs> { },
-}:
-pkgs.mkShell rec {
-  libs = with pkgs; [
-    # wayland
-    libxkbcommon
-    libGL
-    wayland
-
-    libx11
-    libxcursor
-    libxi
-
-    clang
-  ];
-
-  nativeBuildInputs =
-    with pkgs;
-    [
-      rustc
-      cargo
-      rust-analyzer
-      python3Packages.fonttools
-    ]
-    ++ libs;
-
-  # add libs to path
-  LD_LIBRARY_PATH = "${pkgs.lib.makeLibraryPath libs}";
-}

src/consts.rs

@@ -1,18 +1,4 @@
-use const_format::formatc;
 use epaint::Color32;
-use shadow_rs::shadow;
-shadow!(build);
-
-/// Constant string that has a string containing information about the build.
-pub const BUILD_INFO: &str = formatc!(
-    "Commit: {} ({})\nBuild Date: {}\nPackage Version: {}\nRust Channel: {}\nRust Version: {}",
-    &build::SHORT_COMMIT,
-    &build::BRANCH,
-    &build::BUILD_TIME,
-    &build::PKG_VERSION,
-    &build::RUST_CHANNEL,
-    &build::RUST_VERSION,
-);
 
 pub const FONT_SIZE: f32 = 14.0;
 

src/function_entry.rs

@@ -1,16 +1,14 @@
 use crate::math_app::AppSettings;
 use crate::misc::{EguiHelper, newtons_method_helper, step_helper};
+use crate::symbolic::try_symbolic;
 use egui::{Checkbox, Context};
-use egui_plot::{Bar, BarChart, PlotPoint, PlotUi};
+use egui_plot::{Bar, BarChart, PlotPoint, PlotUi, Points};
 
 use epaint::Color32;
 use parsing::{AutoComplete, generate_hint};
 use parsing::{BackingFunction, process_func_str};
 use serde::{Deserialize, Deserializer, Serialize, Serializer, ser::SerializeStruct};
-use std::{
-    fmt::{self, Debug},
-    hash::{Hash, Hasher},
-};
+use std::fmt::{self, Debug};
 
 /// Represents the possible variations of Riemann Sums
 #[derive(PartialEq, Eq, Debug, Copy, Clone, Default)]
@@ -34,16 +32,13 @@ pub struct FunctionEntry {
     /// The `BackingFunction` instance that is used to generate `f(x)`, `f'(x)`, and `f''(x)`
     function: BackingFunction,
 
-    /// Stores a function string (that hasn't been processed via `process_func_str`) to display to the user
-    pub raw_func_str: String,
-
     /// If calculating/displayingintegrals are enabled
     pub integral: bool,
 
     /// If displaying derivatives are enabled (note, they are still calculated for other purposes)
     pub derivative: bool,
 
-    pub nth_derviative: bool,
+    pub nth_derivative: bool,
 
     pub back_data: Vec<PlotPoint>,
     pub integral_data: Option<(Vec<Bar>, f64)>,
@@ -60,23 +55,13 @@ pub struct FunctionEntry {
     pub settings_opened: bool,
 }
 
-impl Hash for FunctionEntry {
-    fn hash<H: Hasher>(&self, state: &mut H) {
-        self.raw_func_str.hash(state);
-        self.integral.hash(state);
-        self.nth_derviative.hash(state);
-        self.curr_nth.hash(state);
-        self.settings_opened.hash(state);
-    }
-}
-
 impl Serialize for FunctionEntry {
     fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
     where
         S: Serializer,
     {
         let mut s = serializer.serialize_struct("FunctionEntry", 4)?;
-        s.serialize_field("raw_func_str", &self.raw_func_str)?;
+        s.serialize_field("raw_func_str", &self.autocomplete.string)?;
         s.serialize_field("integral", &self.integral)?;
         s.serialize_field("derivative", &self.derivative)?;
         s.serialize_field("curr_nth", &self.curr_nth)?;
@@ -125,10 +110,9 @@ impl Default for FunctionEntry {
     fn default() -> FunctionEntry {
         FunctionEntry {
             function: BackingFunction::default(),
-            raw_func_str: String::new(),
             integral: false,
             derivative: false,
-            nth_derviative: false,
+            nth_derivative: false,
             back_data: Vec::new(),
             integral_data: None,
             derivative_data: Vec::new(),
@@ -150,14 +134,14 @@ impl FunctionEntry {
 
     pub fn settings_window(&mut self, ctx: &Context) {
         let mut invalidate_nth = false;
-        egui::Window::new(format!("Settings: {}", self.raw_func_str))
+        egui::Window::new(format!("Settings: {}", self.func_str()))
             .open(&mut self.settings_opened)
             .default_pos([200.0, 200.0])
             .resizable(false)
             .collapsible(false)
             .show(ctx, |ui| {
                 ui.add(Checkbox::new(
-                    &mut self.nth_derviative,
+                    &mut self.nth_derivative,
                     "Display Nth Derivative",
                 ));
 
@@ -180,13 +164,32 @@ impl FunctionEntry {
         &self.test_result
     }
 
+    /// Get the raw function string
+    #[inline]
+    pub fn func_str(&self) -> &str {
+        &self.autocomplete.string
+    }
+
     /// Update function string and test it
     pub fn update_string(&mut self, raw_func_str: &str) {
-        if raw_func_str == self.raw_func_str {
+        if raw_func_str == self.func_str() {
             return;
         }
 
-        self.raw_func_str = raw_func_str.to_owned();
+        // Update the autocomplete string (which is now the source of truth for the raw string)
+        self.autocomplete.update_string(raw_func_str);
+
+        self.reparse_function(raw_func_str);
+    }
+
+    /// Re-parse the function from the current autocomplete string.
+    /// Call this when the autocomplete string was updated externally (e.g., via hint application).
+    pub fn sync_from_autocomplete(&mut self) {
+        self.reparse_function(&self.autocomplete.string.clone());
+    }
+
+    /// Internal helper to parse a function string and update internal state
+    fn reparse_function(&mut self, raw_func_str: &str) {
         let processed_func = process_func_str(raw_func_str);
         let new_func_result = BackingFunction::new(&processed_func);
 
@@ -212,17 +215,16 @@ impl FunctionEntry {
     ) -> (Vec<(f64, f64)>, f64) {
         let step = (integral_max_x - integral_min_x) / (integral_num as f64);
 
-        // let sum_func = self.get_sum_func(sum);
-
-        let data2: Vec<(f64, f64)> = step_helper(integral_num, integral_min_x, step)
+        let data: Vec<(f64, f64)> = step_helper(integral_num, integral_min_x, step)
             .into_iter()
             .map(|x| {
-                let step_offset = step.copysign(x); // store the offset here so it doesn't have to be calculated multiple times
-                let x2: f64 = x + step_offset;
+                let step_offset = step.copysign(x);
+                let x2 = x + step_offset;
 
-                let (left_x, right_x) = match x.is_sign_positive() {
-                    true => (x, x2),
-                    false => (x2, x),
+                let (left_x, right_x) = if x.is_sign_positive() {
+                    (x, x2)
+                } else {
+                    (x2, x)
                 };
 
                 let y = match sum {
@@ -238,9 +240,9 @@ impl FunctionEntry {
             .filter(|(_, y)| y.is_finite())
             .collect();
 
-        let area = data2.iter().map(move |(_, y)| y * step).sum();
+        let area = data.iter().map(|(_, y)| y * step).sum();
 
-        (data2, area)
+        (data, area)
     }
 
     /// Helps with processing newton's method depending on level of derivative
@@ -252,30 +254,36 @@ impl FunctionEntry {
     ) -> Vec<PlotPoint> {
         self.function.generate_derivative(derivative_level);
         self.function.generate_derivative(derivative_level + 1);
-        let newtons_method_output: Vec<f64> = match derivative_level {
-            0 => newtons_method_helper(
-                threshold,
-                range,
-                self.back_data.as_slice(),
-                self.function.get_function_derivative(0),
-                self.function.get_function_derivative(1),
-            ),
-            1 => newtons_method_helper(
-                threshold,
-                range,
-                self.derivative_data.as_slice(),
-                self.function.get_function_derivative(1),
-                self.function.get_function_derivative(2),
-            ),
+
+        let data_source = match derivative_level {
+            0 => self.back_data.as_slice(),
+            1 => self.derivative_data.as_slice(),
             _ => unreachable!(),
         };
 
-        newtons_method_output
+        newtons_method_helper(
+            threshold,
+            range,
+            data_source,
+            self.function.get_function_derivative(derivative_level),
+            self.function.get_function_derivative(derivative_level + 1),
+        )
         .into_iter()
         .map(|x| PlotPoint::new(x, self.function.get(0, x)))
         .collect()
     }
 
+    /// Generates plot data for a given derivative level over the resolution iterator
+    fn generate_plot_data(&mut self, derivative: usize, resolution_iter: &[f64]) -> Vec<PlotPoint> {
+        if derivative > 0 {
+            self.function.generate_derivative(derivative);
+        }
+        resolution_iter
+            .iter()
+            .map(|&x| PlotPoint::new(x, self.function.get(derivative, x)))
+            .collect()
+    }
+
     /// Does the calculations and stores results in `self`
     pub fn calculate(
         &mut self,
@@ -304,32 +312,17 @@ impl FunctionEntry {
         }
 
         if self.back_data.is_empty() {
-            let data: Vec<PlotPoint> = resolution_iter
-                .clone()
-                .into_iter()
-                .map(|x| PlotPoint::new(x, self.function.get(0, x)))
-                .collect();
-            debug_assert_eq!(data.len(), settings.plot_width + 1);
-
-            self.back_data = data;
+            self.back_data = self.generate_plot_data(0, &resolution_iter);
+            debug_assert_eq!(self.back_data.len(), settings.plot_width + 1);
         }
 
         if self.derivative_data.is_empty() {
-            self.function.generate_derivative(1);
-            let data: Vec<PlotPoint> = resolution_iter
-                .clone()
-                .into_iter()
-                .map(|x| PlotPoint::new(x, self.function.get(1, x)))
-                .collect();
-            debug_assert_eq!(data.len(), settings.plot_width + 1);
-            self.derivative_data = data;
+            self.derivative_data = self.generate_plot_data(1, &resolution_iter);
+            debug_assert_eq!(self.derivative_data.len(), settings.plot_width + 1);
         }
 
-        if self.nth_derviative && self.nth_derivative_data.is_none() {
-            let data: Vec<PlotPoint> = resolution_iter
-                .into_iter()
-                .map(|x| PlotPoint::new(x, self.function.get(self.curr_nth, x)))
-                .collect();
+        if self.nth_derivative && self.nth_derivative_data.is_none() {
+            let data = self.generate_plot_data(self.curr_nth, &resolution_iter);
             debug_assert_eq!(data.len(), settings.plot_width + 1);
             self.nth_derivative_data = Some(data);
         }
@@ -352,7 +345,7 @@ impl FunctionEntry {
             self.clear_integral();
         }
 
-        let threshold: f64 = resolution / 2.0;
+        let threshold: f64 = f64::EPSILON;
         let x_range = settings.min_x..settings.max_x;
 
         // Calculates extrema
@@ -385,7 +378,11 @@ impl FunctionEntry {
         let step = (settings.max_x - settings.min_x) / (settings.plot_width as f64);
         debug_assert!(step > 0.0);
 
-        // Plot back data
+        // Check if we have any special points that need exclusion zones
+        let has_special_points = (settings.do_extrema && !self.extrema_data.is_empty())
+            || (settings.do_roots && !self.root_data.is_empty());
+
+        // Plot back data, filtering out points near special points for better hover detection
         if !self.back_data.is_empty() {
             if self.integral && (step >= integral_step) {
                 plot_ui.line(
@@ -403,45 +400,109 @@ impl FunctionEntry {
                         .fill(0.0),
                 );
             }
-            plot_ui.line(
+
+            // Only filter when there are special points to avoid
+            let main_line = if has_special_points {
+                let exclusion_radius = step * 3.0;
+                let is_near_special = |p: &PlotPoint| {
+                    (settings.do_extrema
+                        && self
+                            .extrema_data
+                            .iter()
+                            .any(|sp| (p.x - sp.x).abs() < exclusion_radius))
+                        || (settings.do_roots
+                            && self
+                                .root_data
+                                .iter()
+                                .any(|sp| (p.x - sp.x).abs() < exclusion_radius))
+                };
                 self.back_data
-                    .clone()
+                    .iter()
+                    .filter(|p| !is_near_special(p))
+                    .cloned()
+                    .collect::<Vec<PlotPoint>>()
                     .to_line()
-                    .stroke(egui::Stroke::new(4.0, main_plot_color)),
-            );
+            } else {
+                // No filtering needed - use data directly
+                self.back_data.clone().to_line()
+            };
+
+            plot_ui.line(main_line.stroke(egui::Stroke::new(4.0, main_plot_color)));
         }
 
         // Plot derivative data
         if self.derivative && !self.derivative_data.is_empty() {
-            plot_ui.line(self.derivative_data.clone().to_line().color(Color32::GREEN));
+            let derivative_line = if has_special_points {
+                let exclusion_radius = step * 3.0;
+                let is_near_special = |p: &PlotPoint| {
+                    (settings.do_extrema
+                        && self
+                            .extrema_data
+                            .iter()
+                            .any(|sp| (p.x - sp.x).abs() < exclusion_radius))
+                        || (settings.do_roots
+                            && self
+                                .root_data
+                                .iter()
+                                .any(|sp| (p.x - sp.x).abs() < exclusion_radius))
+                };
+                self.derivative_data
+                    .iter()
+                    .filter(|p| !is_near_special(p))
+                    .cloned()
+                    .collect::<Vec<PlotPoint>>()
+                    .to_line()
+            } else {
+                self.derivative_data.clone().to_line()
+            };
+
+            plot_ui.line(derivative_line.color(Color32::GREEN));
         }
 
         // Plot extrema points
         if settings.do_extrema && !self.extrema_data.is_empty() {
-            plot_ui.points(
-                self.extrema_data
-                    .clone()
-                    .to_points()
-                    .color(Color32::YELLOW)
-                    .radius(5.0), // Radius of points of Extrema
+            for point in &self.extrema_data {
+                let name = format!(
+                    "({}, {})",
+                    try_symbolic(point.x)
+                        .map(|s| s.to_string())
+                        .unwrap_or_else(|| format!("{:.4}", point.x)),
+                    try_symbolic(point.y)
+                        .map(|s| s.to_string())
+                        .unwrap_or_else(|| format!("{:.4}", point.y))
                 );
+                plot_ui.points(
+                    Points::new(name, vec![[point.x, point.y]])
+                        .color(Color32::YELLOW)
+                        .radius(5.0),
+                );
+            }
         }
 
         // Plot roots points
         if settings.do_roots && !self.root_data.is_empty() {
+            for point in &self.root_data {
+                let name = format!(
+                    "({}, {})",
+                    try_symbolic(point.x)
+                        .map(|s| s.to_string())
+                        .unwrap_or_else(|| format!("{:.4}", point.x)),
+                    try_symbolic(point.y)
+                        .map(|s| s.to_string())
+                        .unwrap_or_else(|| format!("{:.4}", point.y))
+                );
                 plot_ui.points(
-                self.root_data
-                    .clone()
-                    .to_points()
+                    Points::new(name, vec![[point.x, point.y]])
                         .color(Color32::LIGHT_BLUE)
-                    .radius(5.0), // Radius of points of Roots
+                        .radius(5.0),
                 );
             }
+        }
 
-        if self.nth_derviative
-            && let Some(ref nth_derviative) = self.nth_derivative_data
+        if self.nth_derivative
+            && let Some(ref nth_derivative) = self.nth_derivative_data
         {
-            plot_ui.line(nth_derviative.clone().to_line().color(Color32::DARK_RED));
+            plot_ui.line(nth_derivative.clone().to_line().color(Color32::DARK_RED));
         }
 
         // Plot integral data
@@ -449,7 +510,7 @@ impl FunctionEntry {
             Some(integral_data) => {
                 if integral_step > step {
                     plot_ui.bar_chart(
-                        BarChart::new(integral_data.0.clone())
+                        BarChart::new("integral bar chart", integral_data.0.clone())
                             .color(Color32::BLUE)
                             .width(integral_step),
                     );

src/function_manager.rs

@@ -1,63 +1,38 @@
-use crate::{
-    consts::COLORS, function_entry::FunctionEntry, misc::random_u64, widgets::widgets_ontop,
-};
-use egui::{Button, Id, Key, Modifiers, TextEdit, WidgetText};
+use crate::{function_entry::FunctionEntry, widgets::widgets_ontop};
+use egui::{Button, Id, Key, Modifiers, Popup, PopupCloseBehavior, TextEdit, WidgetText};
 use emath::vec2;
 use parsing::Movement;
-use serde::ser::SerializeStruct;
-use serde::{Deserialize, Deserializer, Serialize, Serializer};
-use std::collections::hash_map::DefaultHasher;
-use std::hash::{Hash, Hasher};
+use serde::{Deserialize, Serialize};
 use std::ops::BitXorAssign;
 
 type Functions = Vec<(Id, FunctionEntry)>;
+
+#[derive(Serialize, Deserialize)]
 pub struct FunctionManager {
     functions: Functions,
 }
 
 impl Default for FunctionManager {
     fn default() -> Self {
-        let mut vec: Functions = Vec::with_capacity(COLORS.len());
-        vec.push((
-            Id::new(11414819524356497634_u64), // Random number here to avoid call to crate::misc::random_u64()
-            FunctionEntry::default(),
-        ));
-        Self { functions: vec }
+        let mut d = Self::new();
+        d.push_empty();
+        d
     }
 }
 
-impl Serialize for FunctionManager {
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-    where
-        S: Serializer,
-    {
-        let mut s = serializer.serialize_struct("FunctionManager", 1)?;
-        s.serialize_field(
-            "data",
-            &self
-                .functions
-                .iter()
-                .map(|(id, func)| (*id, func.clone()))
-                .collect::<Vec<(Id, FunctionEntry)>>(),
-        )?;
-        s.end()
-    }
-}
+#[test]
+fn func_manager_roundtrip_serdes() {
+    let mut func_manager = FunctionManager {
+        functions: Vec::new(),
+    };
 
-impl<'de> Deserialize<'de> for FunctionManager {
-    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
-    where
-        D: Deserializer<'de>,
-    {
-        #[derive(Deserialize)]
-        struct Helper(Vec<(Id, FunctionEntry)>);
-
-        let helper = Helper::deserialize(deserializer)?;
-
-        Ok(FunctionManager {
-            functions: helper.0.to_vec(),
-        })
-    }
+    func_manager.push_empty();
+    let ser = bincode::serialize(&func_manager).expect("unable to serialize");
+    let des: FunctionManager = bincode::deserialize(&ser).expect("unable to deserialize");
+    assert_eq!(
+        func_manager.functions[0].1.func_str(),
+        des.functions[0].1.func_str()
+    );
 }
 
 /// Function that creates button that's used with the `button_area`
@@ -66,17 +41,15 @@ fn button_area_button<'a>(text: impl Into<WidgetText>) -> Button<'a> {
 }
 
 impl FunctionManager {
-    #[inline]
-    fn get_hash(&self) -> u64 {
-        let mut hasher = DefaultHasher::new();
-        self.functions.hash(&mut hasher);
-        hasher.finish()
+    pub fn new() -> Self {
+        Self {
+            functions: Vec::new(),
+        }
     }
 
     /// Displays function entries alongside returning whether or not functions have been modified
     pub fn display_entries(&mut self, ui: &mut egui::Ui) -> bool {
-        let initial_hash = self.get_hash();
-
+        let mut changed = false;
         let can_remove = self.functions.len() > 1;
 
         let available_width = ui.available_width();
@@ -84,7 +57,6 @@ impl FunctionManager {
         let target_size = vec2(available_width, crate::consts::FONT_SIZE);
         for (i, (te_id, function)) in self.functions.iter_mut().map(|(a, b)| (*a, b)).enumerate() {
             let mut new_string = function.autocomplete.string.clone();
-            function.update_string(&new_string);
 
             let mut movement: Movement = Movement::default();
 
@@ -108,11 +80,15 @@ impl FunctionManager {
             // Only keep valid chars
             new_string.retain(crate::misc::is_valid_char);
 
+            // Track if function string changed and update the function
+            if new_string != function.autocomplete.string {
+                changed = true;
+                function.update_string(&new_string);
+            }
+
             // If not fully open, return here as buttons cannot yet be displayed, therefore the user is inable to mark it for deletion
             let animate_bool = ui.ctx().animate_bool(te_id, re.has_focus());
             if animate_bool == 1.0 {
-                function.autocomplete.update_string(&new_string);
-
                 if function.autocomplete.hint.is_some() {
                     // only register up and down arrow movements if hint is type `Hint::Many`
                     if !function.autocomplete.hint.is_single() {
@@ -137,9 +113,18 @@ impl FunctionManager {
                         movement = Movement::Complete;
                     }
 
+                    // Remember string before movement to detect changes
+                    let string_before = function.autocomplete.string.clone();
+
                     // Register movement and apply proper changes
                     function.autocomplete.register_movement(&movement);
 
+                    // If the string changed (hint was applied), update the backing function
+                    if function.autocomplete.string != string_before {
+                        function.sync_from_autocomplete();
+                        changed = true;
+                    }
+
                     if movement != Movement::Complete
                         && let Some(hints) = function.autocomplete.hint.many()
                     {
@@ -147,7 +132,10 @@ impl FunctionManager {
 
                         let autocomplete_popup_id = Id::new("autocomplete popup");
 
-                        egui::popup_below_widget(ui, autocomplete_popup_id, &re, |ui| {
+                        Popup::from_response(&re)
+                            .id(autocomplete_popup_id)
+                            .close_behavior(PopupCloseBehavior::CloseOnClickOutside)
+                            .show(|ui| {
                                 hints.iter().enumerate().for_each(|(i, candidate)| {
                                     if ui
                                         .selectable_label(i == function.autocomplete.i, *candidate)
@@ -163,19 +151,26 @@ impl FunctionManager {
                             function
                                 .autocomplete
                                 .apply_hint(hints[function.autocomplete.i]);
+                            // Update the backing function with the new string after hint was applied
+                            function.sync_from_autocomplete();
+                            changed = true;
 
                             movement = Movement::Complete;
                         } else {
-                            ui.memory_mut(|x| x.open_popup(autocomplete_popup_id));
+                            Popup::open_id(ui.ctx(), autocomplete_popup_id);
                         }
                     }
 
                     // Push cursor to end if needed
                     if movement == Movement::Complete {
+                        // TODO! proper error handling
                         let mut state =
                             unsafe { TextEdit::load_state(ui.ctx(), te_id).unwrap_unchecked() };
                         let ccursor = egui::text::CCursor::new(function.autocomplete.string.len());
-                        state.set_ccursor_range(Some(egui::text::CCursorRange::one(ccursor)));
+                        state
+                            .cursor
+                            .set_char_range(Some(egui::text::CCursorRange::one(ccursor)));
+
                         TextEdit::store_state(ui.ctx(), te_id, state);
                     }
                 }
@@ -236,17 +231,16 @@ impl FunctionManager {
         // Remove function if the user requests it
         if let Some(remove_i_unwrap) = remove_i {
             self.functions.remove(remove_i_unwrap);
+            changed = true;
         }
 
-        let final_hash = self.get_hash();
-
-        initial_hash != final_hash
+        changed
     }
 
     /// Create and push new empty function entry
     pub fn push_empty(&mut self) {
         self.functions.push((
-            Id::new(random_u64().expect("unable to generate random id")),
+            Id::new(format!("function #{}", self.functions.len() + 1)),
             FunctionEntry::default(),
         ));
     }

src/lib.rs

@@ -6,29 +6,30 @@ mod function_entry;
 mod function_manager;
 mod math_app;
 mod misc;
+pub mod symbolic;
 mod unicode_helper;
 mod widgets;
 
 pub use crate::{
     function_entry::{FunctionEntry, Riemann},
-    math_app::AppSettings,
-    misc::{
-        EguiHelper, HashBytes, hashed_storage_create, hashed_storage_read, newtons_method,
-        option_vec_printer, step_helper,
-    },
+    math_app::{AppSettings, MathApp},
+    misc::{EguiHelper, newtons_method, option_vec_printer, step_helper},
     unicode_helper::{to_chars_array, to_unicode_hash},
 };
 
-cfg_if::cfg_if! {
-    if #[cfg(target_arch = "wasm32")] {
-        use wasm_bindgen::prelude::*;
-
-        use lol_alloc::{FreeListAllocator, LockedAllocator};
-        #[global_allocator]
-                static ALLOCATOR: LockedAllocator<FreeListAllocator> = LockedAllocator::new(FreeListAllocator::new());
-
+// WASM-specific setup
+#[cfg(target_arch = "wasm32")]
+mod wasm {
+    use super::math_app;
     use eframe::WebRunner;
-            // use tracing::metadata::LevelFilter;
+    use lol_alloc::{FreeListAllocator, LockedAllocator};
+    use wasm_bindgen::prelude::*;
+    use web_sys::HtmlCanvasElement;
+
+    #[global_allocator]
+    static ALLOCATOR: LockedAllocator<FreeListAllocator> =
+        LockedAllocator::new(FreeListAllocator::new());
+
     #[derive(Clone)]
     #[wasm_bindgen]
     pub struct WebHandle {
@@ -41,9 +42,7 @@ cfg_if::cfg_if! {
         #[allow(clippy::new_without_default)]
         #[wasm_bindgen(constructor)]
         pub fn new() -> Self {
-                     // eframe::WebLogger::init(LevelFilter::Debug).ok();
             tracing_wasm::set_as_global_default();
-
             Self {
                 runner: WebRunner::new(),
             }
@@ -51,12 +50,15 @@ cfg_if::cfg_if! {
 
         /// Call this once from JavaScript to start your app.
         #[wasm_bindgen]
-                 pub async fn start(&self, canvas_id: &str) -> Result<(), wasm_bindgen::JsValue> {
+        pub async fn start(
+            &self,
+            canvas_id: HtmlCanvasElement,
+        ) -> Result<(), wasm_bindgen::JsValue> {
             self.runner
                 .start(
                     canvas_id,
                     eframe::WebOptions::default(),
-                             Box::new(|cc| Box::new(math_app::MathApp::new(cc))),
+                    Box::new(|cc| Ok(Box::new(math_app::MathApp::new(cc)))),
                 )
                 .await
         }
@@ -66,9 +68,20 @@ cfg_if::cfg_if! {
     pub async fn start() {
         tracing::info!("Starting...");
 
+        let document = web_sys::window()
+            .expect("no window")
+            .document()
+            .expect("no document");
+        let canvas = document
+            .get_element_by_id("canvas")
+            .expect("no canvas element")
+            .dyn_into::<HtmlCanvasElement>()
+            .expect("canvas is not an HtmlCanvasElement");
 
         let web_handle = WebHandle::new();
-            web_handle.start("canvas").await.unwrap()
-        }
+        web_handle
+            .start(canvas)
+            .await
+            .expect("failed to start web app");
     }
 }

src/main.rs

@@ -1,14 +1,3 @@
-#[macro_use]
-extern crate static_assertions;
-
-mod consts;
-mod function_entry;
-mod function_manager;
-mod math_app;
-mod misc;
-mod unicode_helper;
-mod widgets;
-
 // For running the program natively! (Because why not?)
 #[cfg(not(target_arch = "wasm32"))]
 fn main() -> eframe::Result<()> {
@@ -21,6 +10,6 @@ fn main() -> eframe::Result<()> {
     eframe::run_native(
         "(Yet-to-be-named) Graphing Software",
         eframe::NativeOptions::default(),
-        Box::new(|cc| Box::new(math_app::MathApp::new(cc))),
+        Box::new(|cc| Ok(Box::new(ytbn_graphing_software::MathApp::new(cc)))),
     )
 }

src/math_app.rs

@@ -1,21 +1,21 @@
 use crate::{
-    consts::{BUILD_INFO, COLORS, DEFAULT_INTEGRAL_NUM, DEFAULT_MAX_X, DEFAULT_MIN_X, build},
+    consts::{COLORS, DEFAULT_INTEGRAL_NUM, DEFAULT_MAX_X, DEFAULT_MIN_X},
     function_entry::Riemann,
     function_manager::FunctionManager,
     misc::option_vec_printer,
+    widgets::toggle_button,
 };
 use eframe::App;
 use egui::{
-    Button, CentralPanel, Color32, ComboBox, Context, DragValue, Frame, Key, Layout, SidePanel,
-    TopBottomPanel, Ui, Vec2, Window, style::Margin,
+    Button, CentralPanel, Color32, ComboBox, Context, CornerRadius, DragValue, Frame, Key, Layout,
+    SidePanel, TopBottomPanel, Ui, Vec2, Window,
 };
 use egui_plot::Plot;
 
 use emath::{Align, Align2};
-use epaint::Rounding;
-use instant::Instant;
+use epaint::Margin;
 use itertools::Itertools;
-use std::{io::Read, ops::BitXorAssign};
+use std::io::Read;
 
 /// Stores current settings/state of [`MathApp`]
 #[derive(Copy, Clone)]
@@ -74,9 +74,6 @@ struct Opened {
     /// Help window
     pub help: bool,
 
-    /// Info window
-    pub info: bool,
-
     /// Sidepanel
     pub side_panel: bool,
 
@@ -88,7 +85,6 @@ impl Default for Opened {
     fn default() -> Opened {
         Self {
             help: false,
-            info: false,
             side_panel: true,
             welcome: true,
         }
@@ -100,8 +96,8 @@ pub struct MathApp {
     /// Stores vector of functions
     functions: FunctionManager,
 
-    /// Contains the list of Areas calculated (the vector of f64) and time it took for the last frame (the Duration). Stored in a Tuple.
-    last_info: (Option<String>, Option<String>),
+    /// Contains the list of Areas calculated
+    areas: Option<String>,
 
     /// Stores opened windows/elements for later reference
     opened: Opened,
@@ -128,109 +124,50 @@ const DATA_NAME: &str = "YTBN-DECOMPRESSED";
 #[cfg(target_arch = "wasm32")]
 const FUNC_NAME: &str = "YTBN-FUNCTIONS";
 
-impl MathApp {
-    #[allow(dead_code)] // This is used lol
-    /// Create new instance of [`MathApp`] and return it
-    pub fn new(cc: &eframe::CreationContext<'_>) -> Self {
-        #[cfg(threading)]
-        tracing::info!("Threading: Enabled");
-
-        #[cfg(not(threading))]
-        tracing::info!("Threading: Disabled");
-
-        tracing::info!("commit: {}", build::SHORT_COMMIT);
-
-        tracing::info!("Initializing...");
-        let start = Instant::now();
-
-        cfg_if::cfg_if! {
-            if #[cfg(target_arch = "wasm32")] {
-
-                tracing::info!("Web Info: {:?}", &cc.integration_info.web_info);
-
-                fn get_storage_decompressed() -> Option<Vec<u8>> {
-                    let data = get_localstorage().get_item(DATA_NAME).ok()??;
-                    let (commit, cached_data) = crate::misc::hashed_storage_read(&data)?;
-
-                    if commit == unsafe { std::mem::transmute::<&str, crate::misc::HashBytes>(build::SHORT_COMMIT) } {
-                        tracing::info!("Reading decompression cache. Bytes: {}", cached_data.len());
-                        return Some(cached_data);
-                    } else {
-                        None
-                    }
-                }
-
+/// Load functions from localStorage (WASM only)
+#[cfg(target_arch = "wasm32")]
 fn load_functions() -> Option<FunctionManager> {
     let data = get_localstorage().get_item(FUNC_NAME).ok()??;
-                    let (commit, func_data) = crate::misc::hashed_storage_read(&data)?;
+    let func_data = crate::misc::hashed_storage_read(&data)?;
 
-                    if commit == unsafe { std::mem::transmute::<&str, &[u8]>(build::SHORT_COMMIT) } {
     tracing::info!("Reading previous function data");
-                        let function_manager: FunctionManager = bincode::deserialize(&func_data).ok()?;
-                        return Some(function_manager);
-                    } else {
+    match bincode::deserialize(&func_data) {
+        Ok(Some(function_manager)) => Some(function_manager),
+        _ => {
+            tracing::info!("Unable to load functionManager instance");
             None
         }
     }
-
-            }
 }
 
 fn decompress_fonts() -> epaint::text::FontDefinitions {
     let mut data = Vec::new();
-            let _ =
-                ruzstd::StreamingDecoder::new(
-                    &mut const {
-                        include_bytes!(concat!(env!("OUT_DIR"), "/compressed_data")).as_slice()
-                    },
+    ruzstd::decoding::StreamingDecoder::new(
+        const { include_bytes!(concat!(env!("OUT_DIR"), "/compressed_data")).as_slice() },
     )
     .expect("unable to decode compressed data")
     .read_to_end(&mut data)
     .expect("unable to read compressed data");
 
-            #[cfg(target = "wasm32")]
-            {
-                tracing::info!("Setting decompression cache");
-                let commit: crate::misc::HashBytes = const {
-                    unsafe {
-                        std::mem::transmute::<&str, crate::misc::HashBytes>(build::SHORT_COMMIT)
-                    }
-                };
-                let saved_data = commit.hashed_storage_create(data);
-                tracing::info!("Bytes: {}", saved_data.len());
-                get_localstorage()
-                    .set_item(DATA_NAME, saved_data)
-                    .expect("failed to set local storage cache");
-            }
-
     bincode::deserialize(data.as_slice()).expect("unable to deserialize bincode")
 }
 
+impl MathApp {
+    #[allow(dead_code)] // This is used lol
+    /// Create new instance of [`MathApp`] and return it
+    pub fn new(cc: &eframe::CreationContext<'_>) -> Self {
+        tracing::info!("Initializing...");
+
+        #[cfg(target_arch = "wasm32")]
+        tracing::info!("Web Info: {:?}", &cc.integration_info.web_info);
+
         tracing::info!("Reading fonts...");
 
         // Initialize fonts
         // This used to be in the `update` method, but (after a ton of digging) this actually caused OOMs. that was a pain to debug
-        cc.egui_ctx.set_fonts({
-            #[cfg(target = "wasm32")]
-            if let Some(Ok(data)) =
-                get_storage_decompressed().map(|data| bincode::deserialize(data.as_slice()))
-            {
-                data
-            } else {
-                decompress_fonts()
-            }
+        cc.egui_ctx.set_fonts(decompress_fonts());
 
-            #[cfg(not(target = "wasm32"))]
-            decompress_fonts()
-        });
-
-        // Set dark mode by default
-        // cc.egui_ctx.set_visuals(crate::style::style());
-
-        // Set spacing
-        // cc.egui_ctx.set_spacing(crate::style::SPACING);
-
-        tracing::info!("Initialized! Took: {:?}", start.elapsed());
+        tracing::info!("Initialized!");
 
         Self {
             #[cfg(target_arch = "wasm32")]
@@ -239,7 +176,7 @@ impl MathApp {
             #[cfg(not(target_arch = "wasm32"))]
             functions: FunctionManager::default(),
 
-            last_info: (None, None),
+            areas: None,
             opened: Opened::default(),
             settings: AppSettings::default(),
         }
@@ -339,22 +276,20 @@ impl MathApp {
                 });
 
                 ui.horizontal(|ui| {
-                    self.settings.do_extrema.bitxor_assign(
-                        ui.add(Button::new("Extrema"))
-                            .on_hover_text(match self.settings.do_extrema {
-                                true => "Disable Displaying Extrema",
-                                false => "Display Extrema",
-                            })
-                            .clicked(),
+                    toggle_button(
+                        ui,
+                        &mut self.settings.do_extrema,
+                        "Extrema",
+                        "Disable Displaying Extrema",
+                        "Display Extrema",
                     );
 
-                    self.settings.do_roots.bitxor_assign(
-                        ui.add(Button::new("Roots"))
-                            .on_hover_text(match self.settings.do_roots {
-                                true => "Disable Displaying Roots",
-                                false => "Display Roots",
-                            })
-                            .clicked(),
+                    toggle_button(
+                        ui,
+                        &mut self.settings.do_roots,
+                        "Roots",
+                        "Disable Displaying Roots",
+                        "Display Roots",
                     );
                 });
 
@@ -362,11 +297,8 @@ impl MathApp {
                     #[cfg(target_arch = "wasm32")]
                     {
                         tracing::info!("Saving function data");
-                        use crate::misc::{HashBytes, hashed_storage_create};
-                        let hash: HashBytes =
-                            unsafe { std::mem::transmute::<&str, HashBytes>(build::SHORT_COMMIT) };
-                        let saved_data = hashed_storage_create(
-                            hash,
+
+                        let saved_data = crate::misc::hashed_storage_create(
                             &bincode::serialize(&self.functions)
                                 .expect("unable to deserialize functions"),
                         );
@@ -396,35 +328,24 @@ impl MathApp {
 impl App for MathApp {
     /// Called each time the UI needs repainting.
     fn update(&mut self, ctx: &Context, _frame: &mut eframe::Frame) {
-        // start timer
-        let start = if self.opened.info {
-            Some(instant::Instant::now())
-        } else {
-            // if disabled, clear the stored formatted time
-            self.last_info.1 = None;
-
-            None
-        };
-
         // If keyboard input isn't being grabbed, check for key combos
         if !ctx.wants_keyboard_input() {
             // If `H` key is pressed, toggle Side Panel
-            self.opened
-                .side_panel
-                .bitxor_assign(ctx.input_mut(|x| x.consume_key(egui::Modifiers::NONE, Key::H)));
+            if ctx.input_mut(|x| x.consume_key(egui::Modifiers::NONE, Key::H)) {
+                self.opened.side_panel = !self.opened.side_panel;
+            }
         }
 
         // Creates Top bar that contains some general options
         TopBottomPanel::top("top_bar").show(ctx, |ui| {
             ui.horizontal(|ui| {
                 // Button in top bar to toggle showing the side panel
-                self.opened.side_panel.bitxor_assign(
-                    ui.add(Button::new("Panel"))
-                        .on_hover_text(match self.opened.side_panel {
-                            true => "Hide Side Panel",
-                            false => "Show Side Panel",
-                        })
-                        .clicked(),
+                toggle_button(
+                    ui,
+                    &mut self.opened.side_panel,
+                    "Panel",
+                    "Hide Side Panel",
+                    "Show Side Panel",
                 );
 
                 // Button to add a new function
@@ -440,27 +361,16 @@ impl App for MathApp {
                 }
 
                 // Toggles opening the Help window
-                self.opened.help.bitxor_assign(
-                    ui.add(Button::new("Help"))
-                        .on_hover_text(match self.opened.help {
-                            true => "Close Help Window",
-                            false => "Open Help Window",
-                        })
-                        .clicked(),
-                );
-
-                // Toggles opening the Info window
-                self.opened.info.bitxor_assign(
-                    ui.add(Button::new("Info"))
-                        .on_hover_text(match self.opened.info {
-                            true => "Close Info Window",
-                            false => "Open Info Window",
-                        })
-                        .clicked(),
+                toggle_button(
+                    ui,
+                    &mut self.opened.help,
+                    "Help",
+                    "Close Help Window",
+                    "Open Help Window",
                 );
 
                 // Display Area and time of last frame
-                if let Some(ref area) = self.last_info.0 {
+                if let Some(ref area) = self.areas {
                     ui.label(area);
                 }
             });
@@ -513,20 +423,6 @@ impl App for MathApp {
             }
         }
 
-        // Window with information about the build and current commit
-        Window::new("Info")
-            .open(&mut self.opened.info)
-            .default_pos([200.0, 200.0])
-            .resizable(false)
-            .collapsible(false)
-            .show(ctx, |ui| {
-                ui.add(egui::Label::new(BUILD_INFO));
-
-                if let Some(ref took) = self.last_info.1 {
-                    ui.label(took);
-                }
-            });
-
         // If side panel is enabled, show it.
         if self.opened.side_panel {
             self.side_panel(ctx);
@@ -535,11 +431,11 @@ impl App for MathApp {
         // Central panel which contains the central plot (or an error created when parsing)
         CentralPanel::default()
             .frame(Frame {
-                inner_margin: Margin::symmetric(0.0, 0.0),
-                rounding: Rounding::ZERO,
+                inner_margin: Margin::ZERO,
+                corner_radius: CornerRadius::ZERO,
                 // fill: crate::style::STYLE.window_fill(),
                 fill: Color32::from_gray(27),
-                ..Frame::none()
+                ..Frame::NONE
             })
             .show(ctx, |ui| {
                 // Display an error if it exists
@@ -549,13 +445,8 @@ impl App for MathApp {
                     .iter()
                     .map(|(_, func)| func.get_test_result())
                     .enumerate()
-                    .filter(|(_, error)| error.is_some())
-                    .map(|(i, error)| {
-                        // use unwrap_unchecked as None Errors are already filtered out
-                        unsafe {
-                            format!("(Function #{}) {}\n", i, error.as_ref().unwrap_unchecked())
-                        }
-                    })
+                    .filter_map(|(i, error)| error.as_ref().map(|x| (i, x)))
+                    .map(|(i, error)| format!("(Function #{}) {}\n", i, error))
                     .join("");
 
                 if !errors_formatted.is_empty() {
@@ -609,15 +500,12 @@ impl App for MathApp {
                             })
                             .collect();
 
-                        self.last_info.0 = if area.iter().any(|e| e.is_some()) {
+                        self.areas = if area.iter().any(|e| e.is_some()) {
                             Some(format!("Area: {}", option_vec_printer(area.as_slice())))
                         } else {
                             None
                         };
                     });
             });
-
-        // Calculate and store the last time it took to draw the frame
-        self.last_info.1 = start.map(|a| format!("Took: {}ms", a.elapsed().as_micros()));
     }
 }

src/misc.rs

@@ -1,20 +1,20 @@
-use base64::{Engine as _, engine::general_purpose};
+use base64::Engine;
+use base64::engine::general_purpose;
 use egui_plot::{Line, PlotPoint, PlotPoints, Points};
 use emath::Pos2;
-use getrandom::getrandom;
 use itertools::Itertools;
 use parsing::FlatExWrapper;
 
 /// Implements traits that are useful when dealing with Vectors of egui's `Value`
 pub trait EguiHelper {
     /// Converts to `egui::plot::Values`
-    fn to_values(self) -> PlotPoints;
+    fn to_values(self) -> PlotPoints<'static>;
 
     /// Converts to `egui::plot::Line`
-    fn to_line(self) -> Line;
+    fn to_line(self) -> Line<'static>;
 
     /// Converts to `egui::plot::Points`
-    fn to_points(self) -> Points;
+    fn to_points(self) -> Points<'static>;
 
     /// Converts Vector of Values into vector of tuples
     fn to_tuple(self) -> Vec<(f64, f64)>;
@@ -22,18 +22,18 @@ pub trait EguiHelper {
 
 impl EguiHelper for Vec<PlotPoint> {
     #[inline(always)]
-    fn to_values(self) -> PlotPoints {
+    fn to_values(self) -> PlotPoints<'static> {
         PlotPoints::from(unsafe { std::mem::transmute::<Vec<PlotPoint>, Vec<[f64; 2]>>(self) })
     }
 
     #[inline(always)]
-    fn to_line(self) -> Line {
-        Line::new(self.to_values())
+    fn to_line(self) -> Line<'static> {
+        Line::new("", self.to_values())
     }
 
     #[inline(always)]
-    fn to_points(self) -> Points {
-        Points::new(self.to_values())
+    fn to_points(self) -> Points<'static> {
+        Points::new("", self.to_values())
     }
 
     #[inline(always)]
@@ -91,9 +91,7 @@ pub fn newtons_method_helper(
         .filter(|(prev, curr)| prev.y.is_finite() && curr.y.is_finite())
         .filter(|(prev, curr)| prev.y.signum() != curr.y.signum())
         .map(|(start, _)| start.x)
-        .map(|x| newtons_method(f, f_1, x, range, threshold))
-        .filter(|x| x.is_some())
-        .map(|x| unsafe { x.unwrap_unchecked() })
+        .filter_map(|x| newtons_method(f, f_1, x, range, threshold))
         .collect()
 }
 
@@ -151,58 +149,14 @@ pub fn step_helper(max_i: usize, min_x: f64, step: f64) -> Vec<f64> {
         .collect()
 }
 
-// TODO: use in hovering over points
-/// Attempts to see what variable `x` is almost
 #[allow(dead_code)]
-pub fn almost_variable(x: f64) -> Option<char> {
-    const EPSILON: f32 = f32::EPSILON * 2.0;
-    if emath::almost_equal(x as f32, std::f32::consts::E, EPSILON) {
-        Some('e')
-    } else if emath::almost_equal(x as f32, std::f32::consts::PI, EPSILON) {
-        Some('π')
-    } else {
-        None
-    }
-}
-
-pub const HASH_LENGTH: usize = 8;
-
-/// Represents bytes used to represent hash info
-pub type HashBytes = [u8; HASH_LENGTH];
-
-#[allow(dead_code)]
-pub fn hashed_storage_create(hashbytes: HashBytes, data: &[u8]) -> String {
-    let combined_data = [hashbytes.to_vec(), data.to_vec()].concat();
-    general_purpose::STANDARD.encode(combined_data)
+pub fn hashed_storage_create(data: &[u8]) -> String {
+    general_purpose::STANDARD.encode(data)
 }
 
 #[allow(dead_code)]
-pub fn hashed_storage_read(data: &str) -> Option<(HashBytes, Vec<u8>)> {
-    // Decode base64 data
-    let decoded_bytes = general_purpose::STANDARD.decode(data).ok()?;
-
-    // Make sure data is long enough to decode
-    if HASH_LENGTH > decoded_bytes.len() {
-        return None;
-    }
-
-    // Split hash and data
-    let (hash_bytes, data_bytes) = decoded_bytes.split_at(HASH_LENGTH);
-
-    // Convert hash bytes to HashBytes
-    let hash: HashBytes = hash_bytes.try_into().ok()?;
-
-    Some((hash, data_bytes.to_vec()))
-}
-
-/// Creates and returns random u64
-pub fn random_u64() -> Result<u64, getrandom::Error> {
-    // Buffer of 8 `u8`s that are later merged into one u64
-    let mut buf = [0u8; 8];
-    // Populate buffer with random values
-    getrandom(&mut buf)?;
-    // Merge buffer into u64
-    Ok(u64::from_be_bytes(buf))
+pub fn hashed_storage_read(data: &str) -> Option<Vec<u8>> {
+    general_purpose::STANDARD.decode(data).ok()
 }
 
 include!(concat!(env!("OUT_DIR"), "/valid_chars.rs"));

src/symbolic.rs

@@ -0,0 +1,210 @@
+use std::fmt;
+
+/// Maximum denominator to consider when checking for rational approximations.
+const MAX_DENOMINATOR: i64 = 12;
+
+/// Maximum coefficient to consider for multiples of special constants.
+const MAX_COEFFICIENT: i64 = 12;
+
+/// Represents a symbolic mathematical value.
+#[derive(Debug, Clone, PartialEq)]
+pub struct SymbolicValue {
+    /// The original numeric value
+    value: f64,
+    /// The symbolic representation
+    repr: SymbolicRepr,
+}
+
+/// The type of symbolic representation.
+#[derive(Debug, Clone, PartialEq)]
+enum SymbolicRepr {
+    /// An integer value
+    Integer(i64),
+    /// A simple fraction: numerator / denominator
+    Fraction { numerator: i64, denominator: i64 },
+    /// A multiple of a constant: (numerator / denominator) * constant
+    ConstantMultiple {
+        numerator: i64,
+        denominator: i64,
+        constant: Constant,
+    },
+}
+
+/// Known mathematical constants.
+#[derive(Debug, Clone, Copy, PartialEq)]
+enum Constant {
+    Pi,
+    E,
+    Sqrt(i64),
+}
+
+impl Constant {
+    fn value(self) -> f64 {
+        match self {
+            Constant::Pi => std::f64::consts::PI,
+            Constant::E => std::f64::consts::E,
+            Constant::Sqrt(n) => (n as f64).sqrt(),
+        }
+    }
+
+    fn name(self) -> String {
+        match self {
+            Constant::Pi => "pi".to_string(),
+            Constant::E => "e".to_string(),
+            Constant::Sqrt(n) => format!("sqrt({})", n),
+        }
+    }
+}
+
+/// All constants to try, in order of priority.
+const CONSTANTS: &[Constant] = &[
+    Constant::Pi,
+    Constant::E,
+    Constant::Sqrt(2),
+    Constant::Sqrt(3),
+    Constant::Sqrt(5),
+    Constant::Sqrt(6),
+    Constant::Sqrt(7),
+];
+
+impl SymbolicValue {
+    /// Returns the original numeric value.
+    pub fn numeric_value(&self) -> f64 {
+        self.value
+    }
+}
+
+impl fmt::Display for SymbolicValue {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match &self.repr {
+            SymbolicRepr::Integer(n) => write!(f, "{}", n),
+            SymbolicRepr::Fraction {
+                numerator,
+                denominator,
+            } => write!(f, "{}/{}", numerator, denominator),
+            SymbolicRepr::ConstantMultiple {
+                numerator,
+                denominator,
+                constant,
+            } => format_constant_multiple(f, *numerator, *denominator, &constant.name()),
+        }
+    }
+}
+
+/// Helper function to format a constant multiple like "2pi/3" or "-pi/2"
+fn format_constant_multiple(
+    f: &mut fmt::Formatter<'_>,
+    numerator: i64,
+    denominator: i64,
+    constant: &str,
+) -> fmt::Result {
+    let sign = if numerator < 0 { "-" } else { "" };
+    let abs_num = numerator.abs();
+
+    match (abs_num, denominator) {
+        (1, 1) => write!(f, "{}{}", sign, constant),
+        (_, 1) => write!(f, "{}{}{}", sign, abs_num, constant),
+        (1, _) => write!(f, "{}{}/{}", sign, constant, denominator),
+        (_, _) => write!(f, "{}{}{}/{}", sign, abs_num, constant, denominator),
+    }
+}
+
+/// Attempts to find a symbolic representation for the given numeric value.
+///
+/// Returns `Some(SymbolicValue)` if the value can be represented symbolically,
+/// or `None` if no suitable symbolic representation is found.
+///
+/// # Examples
+///
+/// ```
+/// use ytbn_graphing_software::symbolic::try_symbolic;
+/// use std::f64::consts::PI;
+///
+/// let sym = try_symbolic(PI).unwrap();
+/// assert_eq!(sym.to_string(), "pi");
+///
+/// let sym = try_symbolic(PI / 2.0).unwrap();
+/// assert_eq!(sym.to_string(), "pi/2");
+/// ```
+pub fn try_symbolic(x: f64) -> Option<SymbolicValue> {
+    if !x.is_finite() {
+        return None;
+    }
+
+    // Check for zero
+    if x.abs() < f64::EPSILON {
+        return Some(SymbolicValue {
+            value: x,
+            repr: SymbolicRepr::Integer(0),
+        });
+    }
+
+    // Try each constant in order of preference
+    for &constant in CONSTANTS {
+        if let Some(repr) = try_constant_multiple(x, constant) {
+            return Some(SymbolicValue { value: x, repr });
+        }
+    }
+
+    // Fall back to rational approximation
+    try_rational(x).map(|repr| SymbolicValue { value: x, repr })
+}
+
+/// Try to represent x as (numerator/denominator) * constant
+fn try_constant_multiple(x: f64, constant: Constant) -> Option<SymbolicRepr> {
+    let c = constant.value();
+
+    for denom in 1..=MAX_DENOMINATOR {
+        let num_f = x * (denom as f64) / c;
+        let num = num_f.round() as i64;
+
+        // Skip if coefficient is zero or too large
+        if num == 0 || num.abs() > MAX_COEFFICIENT * denom {
+            continue;
+        }
+
+        let expected = (num as f64) * c / (denom as f64);
+        if (x - expected).abs() < f64::EPSILON {
+            let g = gcd(num.abs(), denom);
+            return Some(SymbolicRepr::ConstantMultiple {
+                numerator: num / g,
+                denominator: denom / g,
+                constant,
+            });
+        }
+    }
+
+    None
+}
+
+/// Try to represent x as a simple fraction: numerator/denominator
+fn try_rational(x: f64) -> Option<SymbolicRepr> {
+    for denom in 1..=MAX_DENOMINATOR {
+        let num_f = x * (denom as f64);
+        let num = num_f.round() as i64;
+
+        if (x - (num as f64) / (denom as f64)).abs() < f64::EPSILON {
+            let g = gcd(num.abs(), denom);
+            let (num, denom) = (num / g, denom / g);
+
+            return Some(if denom == 1 {
+                SymbolicRepr::Integer(num)
+            } else {
+                SymbolicRepr::Fraction {
+                    numerator: num,
+                    denominator: denom,
+                }
+            });
+        }
+    }
+
+    None
+}
+
+/// Compute the greatest common divisor using Euclidean algorithm.
+fn gcd(mut a: i64, mut b: i64) -> i64 {
+    while b != 0 {
+        (a, b) = (b, a % b);
+    }
+    a
+}

src/widgets.rs

@@ -1,5 +1,6 @@
 use crate::misc::Offset;
-use egui::{Id, InnerResponse};
+use egui::{Button, Id, InnerResponse, Ui};
+use std::ops::BitXorAssign;
 
 /// Creates an area ontop of a widget with an y offset
 pub fn widgets_ontop<R>(
@@ -15,3 +16,19 @@ pub fn widgets_ontop<R>(
 
     area.show(ui.ctx(), |ui| add_contents(ui))
 }
+
+/// A toggle button that XORs its state when clicked.
+/// Shows different hover text based on current state.
+pub fn toggle_button(
+    ui: &mut Ui,
+    state: &mut bool,
+    label: &str,
+    enabled_tip: &str,
+    disabled_tip: &str,
+) {
+    state.bitxor_assign(
+        ui.add(Button::new(label))
+            .on_hover_text(if *state { enabled_tip } else { disabled_tip })
+            .clicked(),
+    );
+}

tests/function.rs

@@ -84,7 +84,7 @@ fn do_test(sum: Riemann, area_target: f64) {
             if !emath::almost_equal(a[i].0 as f32, DERIVATIVE_TARGET[i].0 as f32, f32::EPSILON)
                 | !emath::almost_equal(a[i].1 as f32, DERIVATIVE_TARGET[i].1 as f32, f32::EPSILON)
             {
-                panic!("Expected: {:?}\nGot: {:?}", a, DERIVATIVE_TARGET);
+                panic!("Expected: {:?}\nGot: {:?}", DERIVATIVE_TARGET, a);
             }
         }
 
@@ -98,7 +98,7 @@ fn do_test(sum: Riemann, area_target: f64) {
             if !emath::almost_equal(a_1[i].0 as f32, BACK_TARGET[i].0 as f32, f32::EPSILON)
                 | !emath::almost_equal(a_1[i].1 as f32, BACK_TARGET[i].1 as f32, f32::EPSILON)
             {
-                panic!("Expected: {:?}\nGot: {:?}", a_1, BACK_TARGET);
+                panic!("Expected: {:?}\nGot: {:?}", BACK_TARGET, a_1);
             }
         }
     }
@@ -131,7 +131,7 @@ fn do_test(sum: Riemann, area_target: f64) {
             if !emath::almost_equal(a[i].0 as f32, b[i].0 as f32, f32::EPSILON)
                 | !emath::almost_equal(a[i].1 as f32, b[i].1 as f32, f32::EPSILON)
             {
-                panic!("Expected: {:?}\nGot: {:?}", a, b);
+                panic!("Expected: {:?}\nGot: {:?}", b, a);
             }
         }
 
@@ -160,7 +160,7 @@ fn do_test(sum: Riemann, area_target: f64) {
             if !emath::almost_equal(a_1[i].0 as f32, b_1[i].0 as f32, f32::EPSILON)
                 | !emath::almost_equal(a_1[i].1 as f32, b_1[i].1 as f32, f32::EPSILON)
             {
-                panic!("Expected: {:?}\nGot: {:?}", a_1, b_1);
+                panic!("Expected: {:?}\nGot: {:?}", b_1, a_1);
             }
         }
     }
@@ -193,7 +193,7 @@ fn do_test(sum: Riemann, area_target: f64) {
             if !emath::almost_equal(a[i].0 as f32, b[i].0 as f32, f32::EPSILON)
                 | !emath::almost_equal(a[i].1 as f32, b[i].1 as f32, f32::EPSILON)
             {
-                panic!("Expected: {:?}\nGot: {:?}", a, b);
+                panic!("Expected: {:?}\nGot: {:?}", b, a);
             }
         }
 
@@ -222,7 +222,7 @@ fn do_test(sum: Riemann, area_target: f64) {
             if !emath::almost_equal(a_1[i].0 as f32, b_1[i].0 as f32, f32::EPSILON)
                 | !emath::almost_equal(a_1[i].1 as f32, b_1[i].1 as f32, f32::EPSILON)
             {
-                panic!("Expected: {:?}\nGot: {:?}", a_1, b_1);
+                panic!("Expected: {:?}\nGot: {:?}", b_1, a_1);
             }
         }
     }
@@ -230,7 +230,7 @@ fn do_test(sum: Riemann, area_target: f64) {
     {
         function.update_string("sin(x)");
         assert!(function.get_test_result().is_none());
-        assert_eq!(&function.raw_func_str, "sin(x)");
+        assert_eq!(function.func_str(), "sin(x)");
 
         function.integral = false;
         function.derivative = false;
@@ -271,3 +271,260 @@ fn middle_function() {
 fn right_function() {
     do_test(Riemann::Right, 0.8800000000000001);
 }
+
+#[test]
+fn test_extrema() {
+    let mut settings = app_settings_constructor(Riemann::Middle, -2.0, 2.0, 100, 100, -2.0, 2.0);
+    settings.do_extrema = true;
+
+    let mut function = FunctionEntry::default();
+    function.update_string("x^2 - 4"); // Parabola with vertex at (0, -4)
+    function.integral = false;
+    function.derivative = false;
+
+    function.calculate(true, true, false, settings);
+
+    // For f(x) = x^2 - 4, f'(x) = 2x
+    // Extrema occurs where f'(x) = 0, so at x = 0
+    assert!(!function.extrema_data.is_empty());
+
+    // Should have exactly one extremum at x = 0
+    assert_eq!(function.extrema_data.len(), 1);
+
+    let extremum = function.extrema_data[0];
+    assert!(emath::almost_equal(extremum.x as f32, 0.0, f32::EPSILON));
+    assert!(emath::almost_equal(extremum.y as f32, -4.0, f32::EPSILON));
+}
+
+#[test]
+fn test_extrema_multiple() {
+    let mut settings = app_settings_constructor(Riemann::Middle, -3.0, 3.0, 200, 200, -3.0, 3.0);
+    settings.do_extrema = true;
+
+    let mut function = FunctionEntry::default();
+    function.update_string("x^3 - 3*x"); // Cubic with local max and min
+    function.integral = false;
+    function.derivative = false;
+
+    function.calculate(true, true, false, settings);
+
+    // For f(x) = x^3 - 3x, f'(x) = 3x^2 - 3
+    // Extrema occur where f'(x) = 0, so at x = ±1
+    assert!(!function.extrema_data.is_empty());
+
+    // Should have exactly two extrema
+    assert_eq!(function.extrema_data.len(), 2);
+
+    // Sort by x coordinate for consistent testing
+    let mut extrema = function.extrema_data.clone();
+    extrema.sort_by(|a, b| a.x.partial_cmp(&b.x).unwrap());
+
+    // First extremum at x = -1, f(-1) = -1 + 3 = 2
+    assert!(emath::almost_equal(extrema[0].x as f32, -1.0, 0.01));
+    assert!(emath::almost_equal(extrema[0].y as f32, 2.0, 0.01));
+
+    // Second extremum at x = 1, f(1) = 1 - 3 = -2
+    assert!(emath::almost_equal(extrema[1].x as f32, 1.0, 0.01));
+    assert!(emath::almost_equal(extrema[1].y as f32, -2.0, 0.01));
+}
+
+#[test]
+fn test_extrema_disabled() {
+    let mut settings = app_settings_constructor(Riemann::Middle, -2.0, 2.0, 100, 100, -2.0, 2.0);
+    settings.do_extrema = false; // Disable extrema
+
+    let mut function = FunctionEntry::default();
+    function.update_string("x^2 - 4");
+    function.integral = false;
+    function.derivative = false;
+
+    function.calculate(true, true, false, settings);
+
+    // Extrema data should be empty when disabled
+    assert!(function.extrema_data.is_empty());
+}
+
+#[test]
+fn test_roots() {
+    let mut settings = app_settings_constructor(Riemann::Middle, -3.0, 3.0, 200, 200, -3.0, 3.0);
+    settings.do_roots = true;
+
+    let mut function = FunctionEntry::default();
+    function.update_string("x^2 - 4"); // Parabola crossing x-axis at ±2
+    function.integral = false;
+    function.derivative = false;
+
+    function.calculate(true, true, false, settings);
+
+    // For f(x) = x^2 - 4, roots occur where x^2 = 4, so at x = ±2
+    assert!(!function.root_data.is_empty());
+
+    // Should have exactly two roots
+    assert_eq!(function.root_data.len(), 2);
+
+    // Sort by x coordinate for consistent testing
+    let mut roots = function.root_data.clone();
+    roots.sort_by(|a, b| a.x.partial_cmp(&b.x).unwrap());
+
+    // First root at x = -2
+    assert!(emath::almost_equal(roots[0].x as f32, -2.0, 0.01));
+    assert!(emath::almost_equal(roots[0].y as f32, 0.0, 0.001));
+
+    // Second root at x = 2
+    assert!(emath::almost_equal(roots[1].x as f32, 2.0, 0.01));
+    assert!(emath::almost_equal(roots[1].y as f32, 0.0, 0.001));
+}
+
+#[test]
+fn test_roots_single() {
+    let mut settings = app_settings_constructor(Riemann::Middle, -2.0, 2.0, 100, 100, -2.0, 2.0);
+    settings.do_roots = true;
+
+    let mut function = FunctionEntry::default();
+    function.update_string("x - 1"); // Linear function crossing x-axis at x = 1
+    function.integral = false;
+    function.derivative = false;
+
+    function.calculate(true, true, false, settings);
+
+    // For f(x) = x - 1, root occurs at x = 1
+    assert!(!function.root_data.is_empty());
+
+    // Should have exactly one root
+    assert_eq!(function.root_data.len(), 1);
+
+    let root = function.root_data[0];
+    assert!(emath::almost_equal(root.x as f32, 1.0, 0.01));
+    assert!(emath::almost_equal(root.y as f32, 0.0, f32::EPSILON));
+}
+
+#[test]
+fn test_roots_disabled() {
+    let mut settings = app_settings_constructor(Riemann::Middle, -3.0, 3.0, 200, 200, -3.0, 3.0);
+    settings.do_roots = false; // Disable roots
+
+    let mut function = FunctionEntry::default();
+    function.update_string("x^2 - 4");
+    function.integral = false;
+    function.derivative = false;
+
+    function.calculate(true, true, false, settings);
+
+    // Root data should be empty when disabled
+    assert!(function.root_data.is_empty());
+}
+
+#[test]
+fn test_extrema_and_roots_together() {
+    let mut settings = app_settings_constructor(Riemann::Middle, -3.0, 3.0, 200, 200, -3.0, 3.0);
+    settings.do_extrema = true;
+    settings.do_roots = true;
+
+    let mut function = FunctionEntry::default();
+    function.update_string("x^2 - 1"); // Parabola with vertex at (0, -1) and roots at ±1
+    function.integral = false;
+    function.derivative = false;
+
+    function.calculate(true, true, false, settings);
+
+    // Should have one extremum at x = 0
+    assert!(!function.extrema_data.is_empty());
+    assert_eq!(function.extrema_data.len(), 1);
+    let extremum = function.extrema_data[0];
+    assert!(emath::almost_equal(extremum.x as f32, 0.0, 0.01));
+    assert!(emath::almost_equal(extremum.y as f32, -1.0, 0.01));
+
+    // Should have two roots at x = ±1
+    assert!(!function.root_data.is_empty());
+    assert_eq!(function.root_data.len(), 2);
+
+    let mut roots = function.root_data.clone();
+    roots.sort_by(|a, b| a.x.partial_cmp(&b.x).unwrap());
+
+    assert!(emath::almost_equal(roots[0].x as f32, -1.0, 0.01));
+    assert!(emath::almost_equal(roots[1].x as f32, 1.0, 0.01));
+}
+
+#[test]
+fn test_extrema_no_extrema() {
+    let mut settings = app_settings_constructor(Riemann::Middle, -2.0, 2.0, 100, 100, -2.0, 2.0);
+    settings.do_extrema = true;
+
+    let mut function = FunctionEntry::default();
+    function.update_string("x"); // Linear function has no extrema
+    function.integral = false;
+    function.derivative = false;
+
+    function.calculate(true, true, false, settings);
+
+    // Linear function should have no extrema
+    assert!(function.extrema_data.is_empty());
+}
+
+#[test]
+fn test_roots_no_roots() {
+    let mut settings = app_settings_constructor(Riemann::Middle, -2.0, 2.0, 100, 100, -2.0, 2.0);
+    settings.do_roots = true;
+
+    let mut function = FunctionEntry::default();
+    function.update_string("x^2 + 1"); // Parabola that never crosses x-axis
+    function.integral = false;
+    function.derivative = false;
+
+    function.calculate(true, true, false, settings);
+
+    // Function that never crosses x-axis should have no roots
+    assert!(function.root_data.is_empty());
+}
+
+#[test]
+fn test_extrema_and_roots_with_trig() {
+    let mut settings = app_settings_constructor(Riemann::Middle, -4.0, 4.0, 300, 300, -4.0, 4.0);
+    settings.do_extrema = true;
+    settings.do_roots = true;
+
+    let mut function = FunctionEntry::default();
+    function.update_string("sin(x)"); // Sine function has extrema at odd multiples of π/2
+    function.integral = false;
+    function.derivative = false;
+
+    function.calculate(true, true, false, settings);
+
+    // Sine function should have extrema in the given range
+    assert!(!function.extrema_data.is_empty());
+
+    // Should have multiple extrema (local max/min)
+    assert!(function.extrema_data.len() >= 2);
+
+    // Check that extrema are at approximately the right locations
+    // Local max at π/2 ≈ 1.57, local min at 3π/2 ≈ 4.71 (outside range)
+    // Local min at -π/2 ≈ -1.57, local max at -3π/2 ≈ -4.71 (outside range)
+    let extrema_x: Vec<f32> = function.extrema_data.iter().map(|p| p.x as f32).collect();
+
+    // Should have extrema near ±π/2
+    assert!(
+        extrema_x
+            .iter()
+            .any(|&x| emath::almost_equal(x, std::f32::consts::PI / 2.0, 0.1))
+    );
+    assert!(
+        extrema_x
+            .iter()
+            .any(|&x| emath::almost_equal(x, -std::f32::consts::PI / 2.0, 0.1))
+    );
+
+    let roots_x: Vec<f32> = function.root_data.iter().map(|p| p.x as f32).collect();
+
+    assert!(
+        roots_x
+            .iter()
+            .any(|&x| emath::almost_equal(x, std::f32::consts::PI, 0.1))
+    );
+    assert!(
+        roots_x
+            .iter()
+            .any(|&x| emath::almost_equal(x, -std::f32::consts::PI, 0.1))
+    );
+
+    assert!(roots_x.iter().any(|&x| emath::almost_equal(x, 0.0, 0.1)));
+}

tests/misc.rs

@@ -60,34 +60,6 @@ fn option_vec_printer() {
     }
 }
 
-#[test]
-fn hashed_storage() {
-    use ytbn_graphing_software::{hashed_storage_create, hashed_storage_read};
-
-    let commit = "abcdefeg".chars().map(|c| c as u8).collect::<Vec<u8>>();
-    let data = "really cool data"
-        .chars()
-        .map(|c| c as u8)
-        .collect::<Vec<u8>>();
-    let storage_tmp: [u8; 8] = commit
-        .as_slice()
-        .try_into()
-        .expect("cannot turn into [u8; 8]");
-    let storage = hashed_storage_create(storage_tmp, data.as_slice());
-
-    let read = hashed_storage_read(&storage);
-    assert_eq!(
-        read.map(|(a, b)| (a.to_vec(), b.to_vec())),
-        Some((commit.to_vec(), data.to_vec()))
-    );
-}
-
-#[test]
-fn invalid_hashed_storage() {
-    use ytbn_graphing_software::hashed_storage_read;
-    assert_eq!(hashed_storage_read("aaaa"), None);
-}
-
 // #[test]
 // fn to_values() {
 // 	use egui::plot::{Value, Values};
@@ -152,7 +124,7 @@ fn newtons_method() {
 
     let data = newtons_method(
         &get_flatexwrapper("x^2 -1"),
-        &get_flatexwrapper("2x"),
+        &get_flatexwrapper("2*x"),
         3.0,
         &(0.0..5.0),
         f64::EPSILON,

tests/symbolic.rs

@@ -0,0 +1,229 @@
+use std::f64::consts::{E, PI, SQRT_2};
+use ytbn_graphing_software::symbolic::try_symbolic;
+
+#[test]
+fn exact_pi() {
+    let result = try_symbolic(PI);
+    assert!(result.is_some());
+    let sym = result.unwrap();
+    assert_eq!(sym.to_string(), "pi");
+}
+
+#[test]
+fn multiples_of_pi() {
+    // 2*pi
+    let result = try_symbolic(2.0 * PI);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "2pi");
+
+    // 3*pi
+    let result = try_symbolic(3.0 * PI);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "3pi");
+
+    // -pi
+    let result = try_symbolic(-PI);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "-pi");
+
+    // -2*pi
+    let result = try_symbolic(-2.0 * PI);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "-2pi");
+}
+
+#[test]
+fn fractions_of_pi() {
+    // pi/2
+    let result = try_symbolic(PI / 2.0);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "pi/2");
+
+    // pi/3
+    let result = try_symbolic(PI / 3.0);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "pi/3");
+
+    // pi/4
+    let result = try_symbolic(PI / 4.0);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "pi/4");
+
+    // pi/6
+    let result = try_symbolic(PI / 6.0);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "pi/6");
+
+    // 2pi/3
+    let result = try_symbolic(2.0 * PI / 3.0);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "2pi/3");
+
+    // 3pi/4
+    let result = try_symbolic(3.0 * PI / 4.0);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "3pi/4");
+
+    // 5pi/6
+    let result = try_symbolic(5.0 * PI / 6.0);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "5pi/6");
+
+    // -pi/2
+    let result = try_symbolic(-PI / 2.0);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "-pi/2");
+}
+
+#[test]
+fn exact_e() {
+    let result = try_symbolic(E);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "e");
+}
+
+#[test]
+fn multiples_of_e() {
+    // 2e
+    let result = try_symbolic(2.0 * E);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "2e");
+
+    // -e
+    let result = try_symbolic(-E);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "-e");
+}
+
+#[test]
+fn sqrt_2() {
+    let result = try_symbolic(SQRT_2);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "sqrt(2)");
+
+    // -sqrt(2)
+    let result = try_symbolic(-SQRT_2);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "-sqrt(2)");
+
+    // 2*sqrt(2)
+    let result = try_symbolic(2.0 * SQRT_2);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "2sqrt(2)");
+}
+
+#[test]
+fn sqrt_3() {
+    let sqrt_3 = 3.0_f64.sqrt();
+    let result = try_symbolic(sqrt_3);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "sqrt(3)");
+
+    // sqrt(3)/2 - common in trigonometry
+    let result = try_symbolic(sqrt_3 / 2.0);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "sqrt(3)/2");
+}
+
+#[test]
+fn simple_fractions() {
+    // 1/2
+    let result = try_symbolic(0.5);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "1/2");
+
+    // 1/3
+    let result = try_symbolic(1.0 / 3.0);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "1/3");
+
+    // 2/3
+    let result = try_symbolic(2.0 / 3.0);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "2/3");
+
+    // 1/4
+    let result = try_symbolic(0.25);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "1/4");
+
+    // 3/4
+    let result = try_symbolic(0.75);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "3/4");
+
+    // -1/2
+    let result = try_symbolic(-0.5);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "-1/2");
+}
+
+#[test]
+fn integers() {
+    // 0
+    let result = try_symbolic(0.0);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "0");
+
+    // 1
+    let result = try_symbolic(1.0);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "1");
+
+    // -1
+    let result = try_symbolic(-1.0);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "-1");
+
+    // 5
+    let result = try_symbolic(5.0);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "5");
+}
+
+#[test]
+fn non_symbolic_values() {
+    // Some arbitrary irrational number that isn't special
+    let result = try_symbolic(1.234567890123);
+    assert!(result.is_none());
+
+    // A number that's close to but not quite pi
+    let result = try_symbolic(3.15);
+    assert!(result.is_none());
+}
+
+#[test]
+fn numeric_value() {
+    // SymbolicValue should provide the original numeric value
+    let sym = try_symbolic(PI).unwrap();
+    assert!((sym.numeric_value() - PI).abs() < 1e-10);
+
+    let sym = try_symbolic(PI / 2.0).unwrap();
+    assert!((sym.numeric_value() - PI / 2.0).abs() < 1e-10);
+}
+
+#[test]
+fn zero() {
+    let result = try_symbolic(0.0);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "0");
+
+    // Also test -0.0
+    let result = try_symbolic(-0.0);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "0");
+}
+
+#[test]
+fn special_trig_values() {
+    // Common values that appear in trigonometry
+    // sin(pi/4) = cos(pi/4) = sqrt(2)/2
+    let result = try_symbolic(SQRT_2 / 2.0);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "sqrt(2)/2");
+
+    // sin(pi/6) = cos(pi/3) = 1/2
+    let result = try_symbolic(0.5);
+    assert!(result.is_some());
+    assert_eq!(result.unwrap().to_string(), "1/2");
+}

www/index.html

@@ -56,9 +56,10 @@
 			margin-left: auto;
 			display: block;
 			position: absolute;
-			top: 0%;
-			left: 50%;
-			transform: translate(-50%, 0%);
+			top: 0;
+			left: 0;
+			width: 100%;
+			height: 100%;
 		}
 	</style>
 </head>