mirror of
https://github.com/zekexiao/pocketlang.git
synced 2025-02-06 04:37:47 +08:00
58 lines
2.3 KiB
JavaScript
58 lines
2.3 KiB
JavaScript
function withLineNumbers(highlight, options = {}) {
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const opts = Object.assign({ class: "codejar-linenumbers", wrapClass: "codejar-wrap", width: "35px", backgroundColor: "rgba(128, 128, 128, 0.15)", color: "" }, options);
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let lineNumbers;
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return function (editor) {
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highlight(editor);
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if (!lineNumbers) {
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lineNumbers = init(editor, opts);
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editor.addEventListener("scroll", () => lineNumbers.style.top = `-${editor.scrollTop}px`);
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}
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const code = editor.textContent || "";
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const linesCount = code.replace(/\n+$/, "\n").split("\n").length + 1;
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let text = "";
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for (let i = 1; i < linesCount; i++) {
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text += `${i}\n`;
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}
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lineNumbers.innerText = text;
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};
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}
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function init(editor, opts) {
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const css = getComputedStyle(editor);
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const wrap = document.createElement("div");
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wrap.className = opts.wrapClass;
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wrap.style.position = "relative";
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const gutter = document.createElement("div");
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gutter.className = opts.class;
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wrap.appendChild(gutter);
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// Add own styles
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gutter.style.position = "absolute";
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gutter.style.top = "0px";
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gutter.style.left = "0px";
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gutter.style.bottom = "0px";
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gutter.style.width = opts.width;
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gutter.style.overflow = "hidden";
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gutter.style.backgroundColor = opts.backgroundColor;
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gutter.style.color = opts.color || css.color;
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gutter.style.setProperty("mix-blend-mode", "difference");
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// Copy editor styles
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gutter.style.fontFamily = css.fontFamily;
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gutter.style.fontSize = css.fontSize;
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gutter.style.lineHeight = css.lineHeight;
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gutter.style.paddingTop = css.paddingTop;
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gutter.style.paddingLeft = css.paddingLeft;
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gutter.style.borderTopLeftRadius = css.borderTopLeftRadius;
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gutter.style.borderBottomLeftRadius = css.borderBottomLeftRadius;
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// Add line numbers
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const lineNumbers = document.createElement("div");
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lineNumbers.style.position = "relative";
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lineNumbers.style.top = "0px";
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gutter.appendChild(lineNumbers);
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// Tweak editor styles
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editor.style.paddingLeft = `calc(${opts.width} + ${gutter.style.paddingLeft})`;
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editor.style.whiteSpace = "pre";
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// Swap editor with a wrap
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editor.parentNode.insertBefore(wrap, editor);
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wrap.appendChild(editor);
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return lineNumbers;
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}
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