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https://github.com/Jermolene/TiddlyWiki5
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115 lines
3.1 KiB
JavaScript
115 lines
3.1 KiB
JavaScript
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/*\
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title: $:/core/modules/startup/CSSescape.js
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type: application/javascript
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module-type: startup
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Polyfill for CSS.escape()
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\*/
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(function(root,factory){
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/*jslint node: true, browser: true */
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/*global $tw: false */
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"use strict";
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// Export name and synchronous status
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exports.name = "css-escape";
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exports.platforms = ["browser"];
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exports.after = ["startup"];
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exports.synchronous = true;
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/*! https://mths.be/cssescape v1.5.1 by @mathias | MIT license */
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// https://github.com/umdjs/umd/blob/master/returnExports.js
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exports.startup = factory(root);
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}(typeof global != 'undefined' ? global : this, function(root) {
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if (root.CSS && root.CSS.escape) {
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return;
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}
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// https://drafts.csswg.org/cssom/#serialize-an-identifier
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var cssEscape = function(value) {
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if (arguments.length == 0) {
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throw new TypeError('`CSS.escape` requires an argument.');
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}
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var string = String(value);
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var length = string.length;
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var index = -1;
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var codeUnit;
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var result = '';
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var firstCodeUnit = string.charCodeAt(0);
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while (++index < length) {
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codeUnit = string.charCodeAt(index);
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// Note: there’s no need to special-case astral symbols, surrogate
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// pairs, or lone surrogates.
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// If the character is NULL (U+0000), then the REPLACEMENT CHARACTER
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// (U+FFFD).
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if (codeUnit == 0x0000) {
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result += '\uFFFD';
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continue;
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}
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if (
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// If the character is in the range [\1-\1F] (U+0001 to U+001F) or is
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// U+007F, […]
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(codeUnit >= 0x0001 && codeUnit <= 0x001F) || codeUnit == 0x007F ||
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// If the character is the first character and is in the range [0-9]
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// (U+0030 to U+0039), […]
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(index == 0 && codeUnit >= 0x0030 && codeUnit <= 0x0039) ||
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// If the character is the second character and is in the range [0-9]
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// (U+0030 to U+0039) and the first character is a `-` (U+002D), […]
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(
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index == 1 &&
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codeUnit >= 0x0030 && codeUnit <= 0x0039 &&
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firstCodeUnit == 0x002D
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)
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) {
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// https://drafts.csswg.org/cssom/#escape-a-character-as-code-point
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result += '\\' + codeUnit.toString(16) + ' ';
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continue;
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}
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if (
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// If the character is the first character and is a `-` (U+002D), and
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// there is no second character, […]
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index == 0 &&
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length == 1 &&
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codeUnit == 0x002D
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) {
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result += '\\' + string.charAt(index);
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continue;
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}
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// If the character is not handled by one of the above rules and is
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// greater than or equal to U+0080, is `-` (U+002D) or `_` (U+005F), or
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// is in one of the ranges [0-9] (U+0030 to U+0039), [A-Z] (U+0041 to
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// U+005A), or [a-z] (U+0061 to U+007A), […]
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if (
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codeUnit >= 0x0080 ||
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codeUnit == 0x002D ||
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codeUnit == 0x005F ||
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codeUnit >= 0x0030 && codeUnit <= 0x0039 ||
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codeUnit >= 0x0041 && codeUnit <= 0x005A ||
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codeUnit >= 0x0061 && codeUnit <= 0x007A
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) {
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// the character itself
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result += string.charAt(index);
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continue;
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}
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// Otherwise, the escaped character.
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// https://drafts.csswg.org/cssom/#escape-a-character
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result += '\\' + string.charAt(index);
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}
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return result;
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};
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if (!root.CSS) {
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root.CSS = {};
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}
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root.CSS.escape = cssEscape;
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}));
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