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add copy button to code blocks
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parent
5e65032e37
commit
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6 changed files with 173 additions and 2 deletions
105
assets/css/code-copy-button.css
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105
assets/css/code-copy-button.css
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/* adapted from https://aaronluna.dev/blog/add-copy-button-to-code-blocks-hugo-chroma/ */
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.highlight-wrapper {
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display: block;
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}
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/* Start: Turn off individual column border, margin, and padding when line numbers are showing */
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.highlight-wrapper .lntd pre {
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padding: 0;
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}
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.chroma .lntd pre {
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border: 0px solid #ccc;
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}
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.chroma .lntd:first-child {
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padding: 7px 7px 7px 10px;
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margin: 0;
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}
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.chroma .lntd:last-child {
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padding: 7px 10px 7px 7px;
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margin: 0;
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}
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/* End: Turn off individual column border, margin, and padding when line numbers are showing */
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.highlight {
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position: relative;
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z-index: 0;
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padding: 0;
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margin:40px 0 10px 0;
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border-radius: 4px;
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}
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.highlight > .chroma {
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position: static;
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z-index: 1;
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border-top-left-radius: 0px;
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border-top-right-radius: 0px;
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border-bottom-left-radius: 4px;
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border-bottom-right-radius: 4px;
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padding: 10px;
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}
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.copy-code-button {
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position: absolute;
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z-index: 2;
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right: 0;
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top: -29px;
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font-size: 13px;
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font-weight: 700;
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line-height: 14px;
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letter-spacing: 0.5px;
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width: 65px;
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color: #ffffff;
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background-color: #000000;
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border: 1.25px solid #232326;
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border-top-left-radius: 4px;
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border-top-right-radius: 4px;
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border-bottom-right-radius: 0px;
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border-bottom-left-radius: 0px;
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white-space: nowrap;
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padding: 6px 6px 7px 6px;
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margin: 0 0 0 1px;
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cursor: pointer;
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opacity: 0.6;
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}
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.copy-code-button:hover,
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.copy-code-button:focus,
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.copy-code-button:active,
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.copy-code-button:active:hover {
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color: #222225;
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background-color: #b3b3b3;
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opacity: 0.8;
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}
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.copyable-text-area {
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position: absolute;
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height: 0;
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z-index: -1;
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opacity: .01;
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}
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.chroma [data-lang]:before {
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position: absolute;
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z-index: 0;
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top: -29px;
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left: 0;
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content: attr(data-lang);
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font-size: 13px;
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font-weight: 700;
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color: white;
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background-color: black;
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border-top-left-radius: 4px;
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border-top-right-radius: 4px;
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border-bottom-left-radius: 0;
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border-bottom-right-radius: 0;
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padding: 6px 6px 7px 6px;
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line-height: 14px;
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opacity: 0.6;
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position: absolute;
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letter-spacing: 0.5px;
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border: 1.25px solid #232326;
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margin: 0 0 0 1px;
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}
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56
assets/js/code-copy-button.js
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56
assets/js/code-copy-button.js
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// adapted from https://aaronluna.dev/blog/add-copy-button-to-code-blocks-hugo-chroma/
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function createCopyButton(highlightDiv) {
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const button = document.createElement("button");
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button.className = "copy-code-button";
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button.type = "button";
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button.innerText = "Copy";
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button.addEventListener("click", () => copyCodeToClipboard(button, highlightDiv));
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highlightDiv.insertBefore(button, highlightDiv.firstChild);
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const wrapper = document.createElement("div");
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wrapper.className = "highlight-wrapper";
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highlightDiv.parentNode.insertBefore(wrapper, highlightDiv);
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wrapper.appendChild(highlightDiv);
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}
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document.querySelectorAll(".highlight").forEach((highlightDiv) => createCopyButton(highlightDiv));
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async function copyCodeToClipboard(button, highlightDiv) {
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// Need to get just the last-child of each .line element to avoid copying the line numbers
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const nodeListToCopy = highlightDiv.querySelectorAll(":last-child > .chroma > code > .line > :last-child");
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// Reduce the nodeList to a string of text with each line separated by a newline
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const codeToCopy = Array.from(nodeListToCopy).reduce((accumulator, line) => accumulator + line.innerText, "");
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try {
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var result = await navigator.permissions.query({ name: "clipboard-write" });
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if (result.state == "granted" || result.state == "prompt") {
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await navigator.clipboard.writeText(codeToCopy);
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} else {
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copyCodeBlockExecCommand(codeToCopy, highlightDiv);
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}
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} catch (_) {
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copyCodeBlockExecCommand(codeToCopy, highlightDiv);
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} finally {
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button.blur();
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button.innerText = "Copied!";
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setTimeout(function () {
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button.innerText = "Copy";
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}, 2000); }
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}
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function copyCodeBlockExecCommand(codeToCopy, highlightDiv) {
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console.log("We shouldn't get here...");
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const textArea = document.createElement("textArea");
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textArea.contentEditable = "true";
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textArea.readOnly = "false";
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textArea.className = "copyable-text-area";
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textArea.value = codeToCopy;
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highlightDiv.insertBefore(textArea, highlightDiv.firstChild);
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const range = document.createRange();
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range.selectNodeContents(textArea);
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const sel = window.getSelection();
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sel.removeAllRanges();
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sel.addRange(range);
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textArea.setSelectionRange(0, 999999);
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document.execCommand("copy");
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highlightDiv.removeChild(textArea);
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}
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@ -2,3 +2,8 @@
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<p class="copyright">{{ .Site.Copyright | markdownify }}</p>
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<p class="advertisement">Powered by <a target="_blank" href="https://gohugo.io/">hugo</a>, <a target="_blank" href="https://github.com/joeroe/risotto">risotto</a>, and <a target="_blank" href="https://www.netlify.com">netlify</a>. Analytics with <a href="https://withcabin.com/privacy/runtimeterror.dev">Cabin</a>.
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<br><a target="_blank" href="https://github.com/jbowdre/runtimeterror">View source</a>.</p>
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{{ if (findRE "<pre" .Content 1) }}
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{{ $jsCopy := resources.Get "js/code-copy-button.js" | minify }}
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<script src="{{ $jsCopy.RelPermalink }}"></script>
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{{ end }}
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@ -21,3 +21,10 @@
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<!-- cabin analytics -->
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<script async defer src="https://scripts.withcabin.com/hello.js"></script>
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{{ if (findRE "<pre" .Content 1) }}
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{{ $syntax := resources.Get "css/syntax.css" | minify }}
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<link href="{{ $syntax.RelPermalink }}" rel="stylesheet">
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{{ $copyCss := resources.Get "css/code-copy-button.css" | minify }}
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<link href="{{ $copyCss.RelPermalink }}" rel="stylesheet">
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{{ end }}
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@ -1,5 +1,3 @@
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@import 'syntax.css';
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/* override page max-width */
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.page {
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max-width: 72rem;
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