Add a manual light/dark mode switcher

Despite the simplicity of the commit title, this was a pretty big
change. The styling used to just go off of the system's color scheme,
but that can't be overridden. Instead, I have made a variable that
determines whether dark theme is active and made a small panel with some
buttons to change the theme. I had to change a lot of code to achieve
this and lost a lot of hair (I metaphorically pulled it out) from
writing this code.

I also changed things from legacy mode to rune mode (Svelte 4 to 5)
while I was at it, that wasn't too big.

src/component/bg.svelte

@@ -5,8 +5,18 @@
   let canvas: HTMLCanvasElement;
   let ctx: CanvasRenderingContext2D;
 
-  let dark_theme = false;
-  let time_scale = 1;
+  let { darkTheme = $bindable() } = $props();
+  let timeScale = 1; // TODO: Make entities a bit faster like they used to
+
+  $effect(() => {
+    darkTheme;
+
+    for (let i = 0; i < gradients.length; i++) {
+      let gradient = gradients[i];
+      gradient.color = getRandomColor();
+      gradient.prepareBuffer();
+    }
+  });
 
   let particleImages: { [key: string]: HTMLImageElement } = {};
 
@@ -49,24 +59,6 @@
         return {};
       });
 
-    if (
-      window.matchMedia &&
-      window.matchMedia("(prefers-color-scheme: dark)").matches
-    ) {
-      dark_theme = true;
-    }
-
-    window
-      .matchMedia("(prefers-color-scheme: dark)")
-      .addEventListener("change", (event) => {
-        dark_theme = event.matches;
-        for (let i = 0; i < gradients.length; i++) {
-          let gradient = gradients[i];
-          gradient.color = getRandomColor();
-          gradient.prepareBuffer();
-        }
-      });
-
     resize();
     init();
     animate();
@@ -99,8 +91,8 @@
     }
 
     update() {
-      this.x += this.speedX * time_scale;
-      this.y += this.speedY * time_scale;
+      this.x += this.speedX * timeScale;
+      this.y += this.speedY * timeScale;
 
       // Reverse direction if particle hits edge
       if (this.x <= 0 || this.x >= window.innerWidth) {
@@ -183,10 +175,10 @@
 
     update() {
       super.update();
-      this.angle += this.rotationSpeed * time_scale;
+      this.angle += this.rotationSpeed * timeScale;
 
       // Breathing effect: oscillate size
-      this.size += this.growthSpeed * time_scale;
+      this.size += this.growthSpeed * timeScale;
       if (
         this.size >= this.originalSize * 1.25 ||
         this.size <= this.originalSize * 0.75
@@ -199,7 +191,7 @@
       ctx.save();
       // The source images are black, so we are inverting them
       // different amounts to get different shades of gray
-      ctx.filter = dark_theme ? "invert(0.15)" : "invert(0.8)";
+      ctx.filter = darkTheme ? "invert(0.15)" : "invert(0.8)";
 
       // Draw center of rotation
       // ctx.beginPath();
@@ -214,7 +206,7 @@
   }
 
   function getRandomColor() {
-    if (dark_theme) {
+    if (darkTheme) {
       let r = Math.floor(Math.random() * 255 - 100);
       let b = Math.floor(Math.random() * 255 - 100);
       let g = Math.floor(Math.random() * 255 - 100);
@@ -273,7 +265,7 @@
         this.radius,
       );
       gradient.addColorStop(0, this.color);
-      if (dark_theme) {
+      if (darkTheme) {
         gradient.addColorStop(1, `rgba(0, 0, 0, 0)`);
       } else {
         gradient.addColorStop(1, `rgba(255, 255, 255, 0)`);

src/component/navbar.svelte

@@ -1,4 +1,6 @@
 <script lang="ts">
+  import { getContext } from "svelte";
+
   function toggleModalMenu() {
     var pages = document.getElementById("pages") as HTMLElement;
     pages.classList.toggle("hidden");
@@ -9,6 +11,8 @@
       pages.classList.toggle("hidden");
     }
   }
+
+  let darkTheme: CallableFunction = getContext("darkTheme");
 </script>
 
 <nav>
@@ -33,7 +37,7 @@
     >
       <i class="bi bi-git"></i>
     </a>
-    <button on:click={toggleModalMenu} class="menu-button" aria-label="menu">
+    <button onclick={toggleModalMenu} class="menu-button" aria-label="menu">
       <i class="bi bi-list"></i>
     </button>
   </div>
@@ -45,10 +49,10 @@ the only way to achieve a proper modal. They even do this in the
 Svelte modal example, https://svelte.dev/playground/modal
 -->
 
-<!-- svelte-ignore a11y_click_events_have_key_events a11y_no_static_element_interactions -->
-<span on:click={modalMenuProcessClick} id="pages" class="modalbg hidden">
-  <div>
-    <button on:click={toggleModalMenu} class="close" aria-label="Close">
+<!-- svelte-ignore a11y_click_events_have_key_events, a11y_no_static_element_interactions -->
+<span onclick={modalMenuProcessClick} id="pages" class="modalbg hidden">
+  <div class={darkTheme ? "dark-theme" : ""}>
+    <button onclick={toggleModalMenu} class="close" aria-label="Close">
       <i class="bi bi-x"></i>
     </button>
     <ul>
@@ -261,9 +265,7 @@ Svelte modal example, https://svelte.dev/playground/modal
     }
   }
 
-  @media (prefers-color-scheme: dark) {
-    span.modalbg div {
-      background-color: #000000bb;
-    }
+  span.modalbg div.dark-theme {
+    background-color: #000000bb;
   }
 </style>

src/component/settings.svelte

@@ -0,0 +1,96 @@
+<script lang="ts">
+  import { getContext } from "svelte";
+  import { themes } from "../script/theme.ts";
+
+  let lightButtonIcon = $state() as HTMLElement;
+  let darkButtonIcon = $state() as HTMLElement;
+  let autoButtonIcon = $state() as HTMLElement;
+  // In case easy access to the buttons themselves is useful, they are provided here.
+  let lightButton = $state() as HTMLButtonElement;
+  let darkButton = $state() as HTMLButtonElement;
+  let autoButton = $state() as HTMLButtonElement;
+
+  let { themeOption = $bindable() } = $props();
+
+  function setThemeOption(newThemeOption: string) {
+    switch (newThemeOption) {
+      case themes.LIGHT:
+        themeOption = themes.LIGHT;
+
+        lightButtonIcon.classList.replace("bi-sun", "bi-sun-fill");
+        darkButtonIcon.classList.replace("bi-moon-fill", "bi-moon");
+        autoButtonIcon.classList.replace("bi-display-fill", "bi-display");
+        break;
+      case themes.DARK:
+        themeOption = themes.DARK;
+
+        lightButtonIcon.classList.replace("bi-sun-fill", "bi-sun");
+        darkButtonIcon.classList.replace("bi-moon", "bi-moon-fill");
+        autoButtonIcon.classList.replace("bi-display-fill", "bi-display");
+        break;
+      case themes.AUTO:
+        themeOption = themes.AUTO;
+
+        lightButtonIcon.classList.replace("bi-sun-fill", "bi-sun");
+        darkButtonIcon.classList.replace("bi-moon-fill", "bi-moon");
+        autoButtonIcon.classList.replace("bi-display", "bi-display-fill");
+        break;
+      default:
+        console.error("setThemeOption was passed a value that is not a theme");
+    }
+  }
+
+  let darkTheme: CallableFunction = getContext("darkTheme");
+</script>
+
+<div class="panel settings {darkTheme() ? 'dark-theme' : ''}">
+  <button
+    aria-label="Dark Theme"
+    bind:this={darkButton}
+    onclick={() => {
+      setThemeOption(themes.DARK);
+    }}
+  >
+    <i bind:this={darkButtonIcon} class="bi bi-moon"></i>
+  </button>
+  <button
+    aria-label="Light Theme"
+    bind:this={lightButton}
+    onclick={() => {
+      setThemeOption(themes.LIGHT);
+    }}
+  >
+    <i bind:this={lightButtonIcon} class="bi bi-sun"></i>
+  </button>
+  <button
+    aria-label="Auto Theme"
+    bind:this={autoButton}
+    onclick={() => {
+      setThemeOption(themes.AUTO);
+    }}
+  >
+    <i bind:this={autoButtonIcon} class="bi bi-display-fill"></i>
+  </button>
+</div>
+
+<style lang="scss">
+  @use "../style/global.scss";
+
+  div.panel.settings {
+    padding: 6px 8px;
+    position: fixed;
+    bottom: 20px;
+    right: 20px;
+  }
+
+  div.panel.settings button {
+    color: global.$text-color;
+    font-size: 110%;
+    cursor: pointer;
+
+    // Reset buton style
+    border: none;
+    background-color: #00000000;
+    border-radius: 0;
+  }
+</style>

src/routes/+layout.svelte

@@ -4,16 +4,79 @@
   import Navbar from "../component/navbar.svelte";
   import Footer from "../component/footer.svelte";
   import Bg from "../component/bg.svelte";
+  import Settings from "../component/settings.svelte";
+  import { themes } from "../script/theme";
+  import { onMount, setContext } from "svelte";
+
+  interface Props {
+    children?: import("svelte").Snippet;
+  }
+  let { children }: Props = $props();
+
+  let themeOption = $state(themes.AUTO);
+  let darkTheme = $state(false);
+
+  /*/
+   * This is necesarry for pages to read the theme,
+   * sucks that we have to use an anonymous function
+   * just to grab a variable
+  /*/
+  let darkThemeCallable = () => darkTheme;
+  setContext("darkTheme", darkThemeCallable);
+
+  function setAutoTheme() {
+    // I'm so sorry about this code (good luck reading/debugging this)
+    darkTheme =
+      window.matchMedia &&
+      window.matchMedia("(prefers-color-scheme: dark)").matches;
+
+    document.documentElement.style.setProperty(
+      "--text-color",
+      darkTheme ? "white" : "#383c3f",
+    );
+    document.body.style.backgroundColor = darkTheme ? "black" : "white";
+  }
+
+  $effect(() => {
+    themeOption;
+
+    switch (themeOption) {
+      case themes.LIGHT:
+        darkTheme = false;
+        document.documentElement.style.setProperty("--text-color", "#383c3f");
+        document.body.style.backgroundColor = "white";
+        break;
+      case themes.DARK:
+        darkTheme = true;
+        document.documentElement.style.setProperty("--text-color", "white");
+        document.body.style.backgroundColor = "black";
+        break;
+      case themes.AUTO:
+        setAutoTheme();
+    }
+  });
+
+  onMount(() => {
+    window
+      .matchMedia("(prefers-color-scheme: dark)")
+      .addEventListener("change", () => {
+        if (themeOption === themes.AUTO) {
+          setAutoTheme();
+        }
+      });
+  });
 </script>
 
 <svelte:head>
   <link rel="icon" href="/img/colormatic_logo.svg" />
 </svelte:head>
 
-<Bg />
+<Bg bind:darkTheme />
 
 <Navbar />
 
-<slot />
+{@render children?.()}
+
+<Settings bind:themeOption />
 
 <Footer />

src/routes/+layout.ts

@@ -1,3 +1,2 @@
 export const prerender = true;
 export const csr = true;
-export const trailingSlash = "always";

src/routes/+page.svelte

@@ -1,5 +1,5 @@
 <script lang="ts">
-  import { onMount } from "svelte";
+  import { getContext, onMount } from "svelte";
 
   let arrow = $state() as HTMLDivElement;
 
@@ -22,6 +22,8 @@
       window.removeEventListener("scroll", checkArrow);
     };
   });
+
+  let darkTheme: CallableFunction = getContext("darkTheme");
 </script>
 
 <svelte:head>
@@ -46,7 +48,7 @@
   <meta property="og:type" content="website" />
 </svelte:head>
 
-<main>
+<main class={darkTheme() ? "dark-theme" : ""}>
   <div class="brand-heading">
     <h1>Colormatic: A non-profit project for creation.</h1>
   </div>
@@ -55,7 +57,7 @@
     <i class="bi bi-arrow-down-circle-fill"></i>
   </div>
 
-  <div style="margin-top:25vh"></div>
+  <div style="margin-top:calc(100vh - 500px);"></div>
 
   <div class="heading">Featured Colormatic Studios Projects:</div>
   <div class="hero panel">

src/routes/about/+page.svelte

@@ -1,3 +1,9 @@
+<script lang="ts">
+  import { getContext } from "svelte";
+
+  let darkTheme: CallableFunction = getContext("darkTheme");
+</script>
+
 <svelte:head>
   <title>Colormatic - About</title>
   <meta
@@ -22,7 +28,7 @@
 
 <spacer></spacer>
 
-<main>
+<main class={darkTheme() ? "dark-theme" : ""}>
   <div class="hero panel">
     <h1>Colormatic: A non-profit project for creation.</h1>
     <p class="justify">

src/routes/studios/+page.svelte

@@ -1,3 +1,9 @@
+<script lang="ts">
+  import { getContext } from "svelte";
+
+  let darkTheme: CallableFunction = getContext("darkTheme");
+</script>
+
 <svelte:head>
   <title>Colormatic Studios</title>
   <meta
@@ -29,7 +35,7 @@
   <meta property="og:type" content="website" />
 </svelte:head>
 
-<main>
+<main class={darkTheme() ? "dark-theme" : ""}>
   <div class="cs-title"><h1>Colormatic Studios</h1></div>
 
   <div class="project-grid-container">

src/routes/video/+page.svelte

@@ -1,5 +1,5 @@
 <script lang="ts">
-  import { onMount } from "svelte";
+  import { getContext, onMount } from "svelte";
 
   onMount(() => {
     let channel = getParam("c");
@@ -10,6 +10,8 @@
     }
   });
 
+  let darkTheme: CallableFunction = getContext("darkTheme");
+
   const BASEURL = "https://files.colormatic.org/";
 
   export function getParam(paramName: string) {
@@ -105,8 +107,8 @@
 
 <spacer></spacer>
 
-<main>
-  <div class="video container">
+<main class={darkTheme() ? "dark-theme" : ""}>
+  <div class="video panel">
     <!-- Video elements are set by a script -->
     <!-- svelte-ignore a11y_media_has_caption -->
     <video id="videoplayer" controls></video>
@@ -135,32 +137,27 @@
 <style lang="scss">
   @use "../../style/global.scss";
 
-  div.video.container {
+  div.video {
     display: flex;
     color: global.$text-color;
     width: 90%;
     margin: 16px auto 16px auto;
-    border: solid 1px #00000033;
-    border-radius: 8px;
-    box-shadow: 1px 1px 8px #00000033;
     padding: 16px;
-    background-color: #ffffff22;
-    backdrop-filter: blur(3px);
   }
 
-  div.video.container video#videoplayer {
+  div.video video#videoplayer {
     flex-grow: 1;
     border-radius: 12px;
     height: auto;
     max-width: 55%;
   }
 
-  div.video.container div.videoobjects {
+  div.video div.videoobjects {
     display: grid;
     padding: 24px;
   }
 
-  div.video.container div.videodetails h1#videotitle {
+  div.video div.videodetails h1#videotitle {
     padding: 0 12px;
   }
 
@@ -169,7 +166,7 @@
     flex-direction: column-reverse;
   }
 
-  div.video.container div.download-dropdown {
+  div.video div.download-dropdown {
     position: relative;
     display: inline-block;
     padding: 12px;
@@ -183,11 +180,11 @@
     text-align: center;
   }
 
-  div.video.container div.download-dropdown:hover {
+  div.video div.download-dropdown:hover {
     box-shadow: 1px 1px 8px #00000088;
   }
 
-  div.video.container div.download-dropdown div.dropdown-content {
+  div.video div.download-dropdown div.dropdown-content {
     display: none;
     position: absolute;
     font-size: 80%;
@@ -198,38 +195,38 @@
     text-align: center;
   }
 
-  div.video.container div.download-dropdown:hover div.dropdown-content {
+  div.video div.download-dropdown:hover div.dropdown-content {
     display: block;
   }
 
-  div.video.container div.download-dropdown div.dropdown-content ul {
+  div.video div.download-dropdown div.dropdown-content ul {
     list-style-type: none;
     padding-left: 0;
   }
 
-  div.video.container div.download-dropdown div.dropdown-content ul li {
+  div.video div.download-dropdown div.dropdown-content ul li {
     padding: 4px;
     cursor: pointer;
   }
 
-  div.video.container div.download-dropdown div.dropdown-content ul li:hover {
+  div.video div.download-dropdown div.dropdown-content ul li:hover {
     background-color: #dcdfdf;
   }
 
-  div.video.container div.download-dropdown div.dropdown-content ul li a {
+  div.video div.download-dropdown div.dropdown-content ul li a {
     text-decoration: none;
     color: global.$text-color;
   }
 
   @media screen and (max-width: global.$mobile-width) {
-    div.video.container {
+    div.video {
       display: block;
     }
-    div.video.container video#videoplayer {
+    div.video video#videoplayer {
       width: 100%;
       max-width: none;
     }
-    div.video.container div.download-dropdown {
+    div.video div.download-dropdown {
       display: block;
       margin-left: auto;
       margin-right: auto;
@@ -237,8 +234,8 @@
     }
   }
 
-  @media (prefers-color-scheme: dark) {
-    div.video.container div.download-dropdown div.dropdown-content {
+  main.dark-theme {
+    div.video div.download-dropdown div.dropdown-content {
       background-color: #444444;
     }
   }

src/routes/zakarya/+page.svelte

@@ -1,3 +1,9 @@
+<script lang="ts">
+  import { getContext } from "svelte";
+
+  let darkTheme: CallableFunction = getContext("darkTheme");
+</script>
+
 <svelte:head>
   <title>Colormatic - Zakarya</title>
   <meta
@@ -23,7 +29,7 @@
   <meta property="og:type" content="website" />
 </svelte:head>
 
-<main>
+<main class={darkTheme() ? "dark-theme" : ""}>
   <img class="banner" src="/img/zakarya-banner.png" alt="Zakarya Banner" />
   <div class="hero panel profile">
     <div class="nameplate">
@@ -206,9 +212,7 @@
     }
   }
 
-  @media (prefers-color-scheme: dark) {
-    main div.profile p {
-      border-color: #ffffff55;
-    }
+  main.dark-theme div.profile p {
+    border-color: #ffffff55;
   }
 </style>

src/script/theme.ts

@@ -0,0 +1,15 @@
+/*/
+ * I know that having a source file this small is a bit silly,
+ * but I think it's probably a good way to do this. Since multiple
+ * components need the theme enum, why not define it in one place.
+ * I also think it's funny for a source file to have more comments
+ * than code. This will probably be changed in a future refactor.
+ *
+ * Also JavaScript enums suck (hot take)
+/*/
+
+export var themes = {
+	LIGHT: "light",
+	DARK: "dark",
+	AUTO: "auto",
+};

src/style/main.scss

@@ -4,21 +4,21 @@
   --text-color: #383c3f;
 }
 
-@media (prefers-color-scheme: dark) {
-  :root {
-    --text-color: white;
-  }
-  body {
-    background-color: black;
-  }
-}
-
 body {
   font-family: "Noto Sans", sans-serif;
   margin: 0;
   color: global.$text-color;
 }
 
+@media (prefers-color-scheme: dark) {
+  body {
+    background-color: black; // Don't flashbang dark theme users
+  }
+  :root {
+    --text-color: white;
+  }
+}
+
 spacer {
   display: block;
   margin-top: 8%;
@@ -60,10 +60,12 @@ div.panel {
   backdrop-filter: blur(5px);
 }
 
-@media (prefers-color-scheme: dark) {
-  div.panel {
-    border-color: #ffffff33;
-  }
+main.dark-theme div.panel {
+  border-color: #ffffff33;
+}
+
+div.panel.dark-theme {
+  border-color: #ffffff33;
 }
 
 main div.hero {
@@ -82,7 +84,7 @@ main div.hero {
   }
 }
 
-main div#scroll-arrow {
+main div.scroll-arrow {
   text-align: center;
   font-size: 200%;
   width: 100%;
@@ -93,7 +95,7 @@ main div#scroll-arrow {
   transition: opacity 0.25s ease-in;
 }
 
-main div#scroll-arrow.scroll-arrow-hide {
+main div.scroll-arrow.scroll-arrow-hide {
   opacity: 0;
   visibility: hidden;
   transition: