feat: improve styles of Expressive Code

saicaca · saicaca · Jun 3, 2025 · Mar 4, 2025 · Mar 7, 2025 · May 31, 2025
commit 3fbbb9df2e25429886e2d329149e2db8c165613c
diff --git a/astro.config.mjs b/astro.config.mjs
@@ -22,6 +22,7 @@ import { GithubCardComponent } from "./src/plugins/rehype-component-github-card.
 import { parseDirectiveNode } from "./src/plugins/remark-directive-rehype.js";
 import { remarkExcerpt } from "./src/plugins/remark-excerpt.js";
 import { remarkReadingTime } from "./src/plugins/remark-reading-time.mjs";
+import { pluginCustomCopyButton } from "./src/plugins/expressive-code/custom-copy-button.js";
 
 // https://astro.build/config
 export default defineConfig({
@@ -60,6 +61,7 @@ export default defineConfig({
                 pluginCollapsibleSections(),
                 pluginLineNumbers(),
                 pluginLanguageBadge(),
+                pluginCustomCopyButton(),
             ],
             defaultProps: {
                 wrap: true,

diff --git a/package.json b/package.json
@@ -64,6 +64,7 @@
     "@astrojs/ts-plugin": "^1.10.4",
     "@biomejs/biome": "1.9.4",
     "@rollup/plugin-yaml": "^4.1.2",
+    "@types/hast": "^3.0.4",
     "@types/markdown-it": "^14.1.2",
     "@types/mdast": "^4.0.4",
     "@types/sanitize-html": "^2.16.0",

diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
diff --git a/src/components/misc/Markdown.astro b/src/components/misc/Markdown.astro
@@ -12,3 +12,24 @@ const className = Astro.props.class;
     <!--<div class="max-w-none custom-md">-->
     <slot/>
 </div>
+
+<script>
+let timeout: ReturnType<typeof setTimeout>;
+document.addEventListener("click", function (e) {
+    if (e.target && e.target?.classList.contains("copy-btn")) {
+        const preEle = e.target.closest("pre");
+        const codeEle = preEle?.querySelector("code");
+        const code = Array.from(codeEle.querySelectorAll(".code:not(summary *)"))
+            .map(e => e.textContent)
+            .map(t => t === "\n" ? "" : t)
+            .join("\n");
+        navigator.clipboard.writeText(code);
+        e.target.classList.add("success");
+        if (timeout) {
+            clearTimeout(timeout);
+        }
+        timeout = setTimeout(() => {
+            e.target.classList.remove("success");
+        }, 1000);}
+});
+</script>
diff --git a/src/plugins/expressive-code/custom-copy-button.ts b/src/plugins/expressive-code/custom-copy-button.ts
@@ -0,0 +1,82 @@
+import { definePlugin } from "@expressive-code/core"
+import type { Element, ElementContent } from 'hast';
+
+export function pluginCustomCopyButton() {
+    return definePlugin({
+        name: "Custom Copy Button",
+        hooks: {
+            postprocessRenderedBlock: context => {
+                function traverse(node: Element) {
+                    if (node.type === "element" && node.tagName === "pre") {
+                        processCodeBlock(node)
+                        return
+                    }
+                    if (node.children) {
+                        for (const child of node.children) {
+                            if (child.type === "element")
+                                traverse(child)
+                        }
+                    }
+                }
+
+                function processCodeBlock(node: Element) {
+                    const copyButton = {
+                        type: "element" as const,
+                        tagName: "button",
+                        properties: {
+                            className: ["copy-btn"],
+                            "aria-label": "Copy code",
+                        },
+                        children: [{
+                            type: "element" as const,
+                            tagName: "div",
+                            properties: {
+                                className: ["copy-btn-icon"],
+                            },
+                            children: [{
+                                type: "element" as const,
+                                tagName: "svg",
+                                properties: {
+                                    viewBox: "0 -960 960 960",
+                                    xmlns: "http://www.w3.org/2000/svg",
+                                    className: ["copy-btn-icon", "copy-icon"]
+                                },
+                                children: [{
+                                    type: "element" as const,
+                                    tagName: "path",
+                                    properties: {
+                                        d: "M368.37-237.37q-34.48 0-58.74-24.26-24.26-24.26-24.26-58.74v-474.26q0-34.48 24.26-58.74 24.26-24.26 58.74-24.26h378.26q34.48 0 58.74 24.26 24.26 24.26 24.26 58.74v474.26q0 34.48-24.26 58.74-24.26 24.26-58.74 24.26H368.37Zm0-83h378.26v-474.26H368.37v474.26Zm-155 238q-34.48 0-58.74-24.26-24.26-24.26-24.26-58.74v-515.76q0-17.45 11.96-29.48 11.97-12.02 29.33-12.02t29.54 12.02q12.17 12.03 12.17 29.48v515.76h419.76q17.45 0 29.48 11.96 12.02 11.97 12.02 29.33t-12.02 29.54q-12.03 12.17-29.48 12.17H213.37Zm155-238v-474.26 474.26Z"
+                                    },
+                                    children: []
+                                }]
+                            }, {
+                                type: "element" as const,
+                                tagName: "svg",
+                                properties: {
+                                    viewBox: "0 -960 960 960",
+                                    xmlns: "http://www.w3.org/2000/svg",
+                                    className: ["copy-btn-icon", "success-icon"]
+                                },
+                                children: [{
+                                    type: "element" as const,
+                                    tagName: "path",
+                                    properties: {
+                                        d: "m389-377.13 294.7-294.7q12.58-12.67 29.52-12.67 16.93 0 29.61 12.67 12.67 12.68 12.67 29.53 0 16.86-12.28 29.14L419.07-288.41q-12.59 12.67-29.52 12.67-16.94 0-29.62-12.67L217.41-430.93q-12.67-12.68-12.79-29.45-.12-16.77 12.55-29.45 12.68-12.67 29.62-12.67 16.93 0 29.28 12.67L389-377.13Z"
+                                    },
+                                    children: []
+                                }]
+                            }]
+                        }],
+                    } as Element;
+
+                    if (!node.children) {
+                        node.children = [];
+                    }
+                    node.children.push(copyButton);
+                }
+
+                traverse(context.renderData.blockAst)
+            }
+        }
+    })
+}
diff --git a/src/plugins/expressive-code/language-badge.ts b/src/plugins/expressive-code/language-badge.ts
@@ -13,13 +13,13 @@ export function pluginLanguageBadge() {
         right: calc(${cssVar('borderWidth')} + ${cssVar('uiPaddingInline')} / 2);
         top: calc(${cssVar('borderWidth')} + 0.35rem);
         padding: 0.1rem 0.5rem;
-        box-shadow: 0 0 1px 1px ${cssVar('codeBackground')};
         content: attr(data-language);
         font-size: 0.75rem;
+        font-weight: bold;
         text-transform: uppercase;
-        color: var(--btn-content);
-        background: var(--btn-regular-bg);
-        border-radius: ${cssVar('borderRadius')};
+        color: oklch(0.75 0.1 var(--hue));
+        background: oklch(0.33 0.035 var(--hue));
+        border-radius: 0.5rem;
         pointer-events: none;
         transition: opacity 0.2s;
         opacity: 0;

diff --git a/src/styles/markdown.css b/src/styles/markdown.css
@@ -58,6 +58,38 @@
         }
     }
 
+    .copy-btn {
+        all: initial;
+        @apply btn-regular-dark opacity-0 shadow-lg shadow-black/50 absolute active:scale-90 h-8 w-8 top-3 right-3 text-sm rounded-lg transition-all ease-in-out z-20 cursor-pointer;
+    }
+    .frame:hover .copy-btn {
+        opacity: 1;
+    }
+
+    .copy-btn-icon {
+        @apply absolute top-1/2 left-1/2 transition -translate-x-1/2 -translate-y-1/2 w-4 h-4 fill-white pointer-events-none;
+    }
+    .copy-btn .copy-icon {
+        @apply opacity-100 fill-white dark:fill-white/75;
+    }
+    .copy-btn.success .copy-icon {
+        @apply opacity-0 fill-[var(--deep-text)]
+    }
+    .copy-btn .success-icon {
+        @apply opacity-0 fill-white;
+    }
+    .copy-btn.success .success-icon {
+        @apply opacity-100
+    }
+
+    .expressive-code {
+        @apply my-4;
+        ::selection {
+            @apply bg-[var(--codeblock-selection)];
+        }
+    }
+
+
     ul, ol {
         li::marker {
             @apply text-[var(--primary)];

diff --git a/src/styles/variables.styl b/src/styles/variables.styl
@@ -56,7 +56,8 @@ define({
   --inline-code-color: var(--btn-content)
   --selection-bg: oklch(0.90 0.05 var(--hue)) oklch(0.40 0.08 var(--hue))
   --codeblock-selection: oklch(0.40 0.08 var(--hue))
-  --codeblock-bg: oklch(0.2 0.015 var(--hue)) oklch(0.17 0.015 var(--hue))
+  --codeblock-bg: oklch(0.17 0.015 var(--hue)) oklch(0.17 0.015 var(--hue))
+  --codeblock-topbar-bg: oklch(0.3 0.02 var(--hue)) oklch(0.12 0.015 var(--hue))
 
   --license-block-bg: black(0.03) var(--codeblock-bg)