55 lines
2.0 KiB
JavaScript
55 lines
2.0 KiB
JavaScript
/**
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* Tags to skip
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*/
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const skipTags = ["script", "style"];
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/**
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* Prettify SVG
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*/
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function prettifySVG(content, tab = " ", depth = 0) {
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let result = "";
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let level = 0;
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content = content.replace(/(\s)*\/>/g, " />");
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while (content.length > 0) {
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const openIndex = content.indexOf("<");
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let closeIndex = content.indexOf(">");
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if (openIndex === -1 && closeIndex === -1) return result;
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if (openIndex === -1 || closeIndex === -1 || closeIndex < openIndex) return null;
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const text = content.slice(0, openIndex);
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const trimmedText = text.trim();
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if (trimmedText.length) if (text.trimStart() !== text && text.trimEnd() !== text) result += trimmedText + "\n" + tab.repeat(level + depth);
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else result = result.trim() + text;
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content = content.slice(openIndex);
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closeIndex -= openIndex;
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const lastChar = content.slice(closeIndex - 1, closeIndex);
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const isClosing = content.slice(0, 2) === "</";
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let isSelfClosing = lastChar === "/" || lastChar === "?";
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if (isClosing && isSelfClosing) return null;
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const tagName = content.slice(isClosing ? 2 : 1).split(/[\s>]/).shift();
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const ignoreTagContent = !isSelfClosing && !isClosing && skipTags.includes(tagName);
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if (!ignoreTagContent) {
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const nextOpenIndex = content.indexOf("<", 1);
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if (nextOpenIndex !== -1 && nextOpenIndex < closeIndex) return null;
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}
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if (isClosing && tab.length) {
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if (result.slice(0 - tab.length) === tab) result = result.slice(0, result.length - tab.length);
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}
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result += content.slice(0, closeIndex + 1);
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content = content.slice(closeIndex + 1);
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if (ignoreTagContent) {
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const closingIndex = content.indexOf("</" + tagName);
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const closingEnd = content.indexOf(">", closingIndex);
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if (closingIndex < 0 || closingEnd < 0) return null;
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result += content.slice(0, closingEnd + 1);
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content = content.slice(closingEnd + 1);
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isSelfClosing = true;
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}
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if (isClosing) {
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level--;
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if (level < 0) return null;
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} else if (!isSelfClosing) level++;
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result += "\n" + tab.repeat(level + depth);
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}
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return level === 0 ? result : null;
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}
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export { prettifySVG }; |