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https://github.com/mozilla/gecko-dev.git
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717 lines
23 KiB
JavaScript
717 lines
23 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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const {angleUtils} = require("devtools/client/shared/css-angle");
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const {colorUtils} = require("devtools/shared/css/color");
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const {getCSSLexer} = require("devtools/shared/css/lexer");
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const EventEmitter = require("devtools/shared/event-emitter");
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const {
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ANGLE_TAKING_FUNCTIONS,
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BEZIER_KEYWORDS,
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COLOR_TAKING_FUNCTIONS,
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CSS_TYPES
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} = require("devtools/shared/css/properties-db");
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const Services = require("Services");
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const HTML_NS = "http://www.w3.org/1999/xhtml";
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const CSS_GRID_ENABLED_PREF = "layout.css.grid.enabled";
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/**
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* This module is used to process text for output by developer tools. This means
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* linking JS files with the debugger, CSS files with the style editor, JS
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* functions with the debugger, placing color swatches next to colors and
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* adding doorhanger previews where possible (images, angles, lengths,
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* border radius, cubic-bezier etc.).
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*
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* Usage:
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* const OutputParser = require("devtools/client/shared/output-parser");
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*
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* let parser = new OutputParser(document, supportsType);
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*
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* parser.parseCssProperty("color", "red"); // Returns document fragment.
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*
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* @param {Document} document Used to create DOM nodes.
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* @param {Function} supportsTypes - A function that returns a boolean when asked if a css
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* property name supports a given css type.
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* The function is executed like supportsType("color", CSS_TYPES.COLOR)
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* where CSS_TYPES is defined in devtools/shared/css/properties-db.js
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* @param {Function} isValidOnClient - A function that checks if a css property
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* name/value combo is valid.
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* @param {Function} supportsCssColor4ColorFunction - A function for checking
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* the supporting of css-color-4 color function.
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*/
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function OutputParser(document,
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{supportsType, isValidOnClient, supportsCssColor4ColorFunction}) {
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this.parsed = [];
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this.doc = document;
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this.supportsType = supportsType;
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this.isValidOnClient = isValidOnClient;
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this.colorSwatches = new WeakMap();
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this.angleSwatches = new WeakMap();
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this._onColorSwatchMouseDown = this._onColorSwatchMouseDown.bind(this);
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this._onAngleSwatchMouseDown = this._onAngleSwatchMouseDown.bind(this);
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this.cssColor4 = supportsCssColor4ColorFunction();
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}
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OutputParser.prototype = {
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/**
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* Parse a CSS property value given a property name.
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*
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* @param {String} name
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* CSS Property Name
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* @param {String} value
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* CSS Property value
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* @param {Object} [options]
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* Options object. For valid options and default values see
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* _mergeOptions().
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* @return {DocumentFragment}
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* A document fragment containing color swatches etc.
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*/
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parseCssProperty: function (name, value, options = {}) {
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options = this._mergeOptions(options);
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options.expectCubicBezier = this.supportsType(name, CSS_TYPES.TIMING_FUNCTION);
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options.expectDisplay = name === "display";
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options.expectFilter = name === "filter";
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options.supportsColor = this.supportsType(name, CSS_TYPES.COLOR) ||
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this.supportsType(name, CSS_TYPES.GRADIENT);
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// The filter property is special in that we want to show the
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// swatch even if the value is invalid, because this way the user
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// can easily use the editor to fix it.
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if (options.expectFilter || this._cssPropertySupportsValue(name, value)) {
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return this._parse(value, options);
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}
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this._appendTextNode(value);
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return this._toDOM();
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},
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/**
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* Given an initial FUNCTION token, read tokens from |tokenStream|
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* and collect all the (non-comment) text. Return the collected
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* text. The function token and the close paren are included in the
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* result.
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*
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* @param {CSSToken} initialToken
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* The FUNCTION token.
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* @param {String} text
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* The original CSS text.
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* @param {CSSLexer} tokenStream
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* The token stream from which to read.
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* @return {String}
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* The text of body of the function call.
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*/
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_collectFunctionText: function (initialToken, text, tokenStream) {
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let result = text.substring(initialToken.startOffset,
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initialToken.endOffset);
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let depth = 1;
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while (depth > 0) {
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let token = tokenStream.nextToken();
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if (!token) {
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break;
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}
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if (token.tokenType === "comment") {
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continue;
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}
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result += text.substring(token.startOffset, token.endOffset);
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if (token.tokenType === "symbol") {
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if (token.text === "(") {
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++depth;
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} else if (token.text === ")") {
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--depth;
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}
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} else if (token.tokenType === "function") {
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++depth;
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}
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}
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return result;
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},
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/**
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* Parse a string.
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*
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* @param {String} text
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* Text to parse.
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* @param {Object} [options]
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* Options object. For valid options and default values see
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* _mergeOptions().
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* @return {DocumentFragment}
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* A document fragment.
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*/
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_parse: function (text, options = {}) {
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text = text.trim();
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this.parsed.length = 0;
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let tokenStream = getCSSLexer(text);
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let parenDepth = 0;
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let outerMostFunctionTakesColor = false;
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let colorOK = function () {
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return options.supportsColor ||
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(options.expectFilter && parenDepth === 1 &&
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outerMostFunctionTakesColor);
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};
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let angleOK = function (angle) {
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return (new angleUtils.CssAngle(angle)).valid;
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};
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let spaceNeeded = false;
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while (true) {
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let token = tokenStream.nextToken();
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if (!token) {
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break;
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}
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if (token.tokenType === "comment") {
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// This doesn't change spaceNeeded, because we didn't emit
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// anything to the output.
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continue;
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}
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switch (token.tokenType) {
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case "function": {
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if (COLOR_TAKING_FUNCTIONS.includes(token.text) ||
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ANGLE_TAKING_FUNCTIONS.includes(token.text)) {
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// The function can accept a color or an angle argument, and we know
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// it isn't special in some other way. So, we let it
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// through to the ordinary parsing loop so that the value
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// can be handled in a single place.
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this._appendTextNode(text.substring(token.startOffset,
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token.endOffset));
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if (parenDepth === 0) {
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outerMostFunctionTakesColor = COLOR_TAKING_FUNCTIONS.includes(
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token.text);
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}
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++parenDepth;
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} else {
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let functionText = this._collectFunctionText(token, text,
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tokenStream);
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if (options.expectCubicBezier && token.text === "cubic-bezier") {
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this._appendCubicBezier(functionText, options);
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} else if (colorOK() &&
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colorUtils.isValidCSSColor(functionText, this.cssColor4)) {
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this._appendColor(functionText, options);
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} else {
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this._appendTextNode(functionText);
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}
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}
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break;
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}
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case "ident":
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if (options.expectCubicBezier &&
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BEZIER_KEYWORDS.indexOf(token.text) >= 0) {
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this._appendCubicBezier(token.text, options);
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} else if (Services.prefs.getBoolPref(CSS_GRID_ENABLED_PREF) &&
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options.expectDisplay && token.text === "grid" &&
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text === token.text) {
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this._appendGrid(token.text, options);
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} else if (colorOK() &&
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colorUtils.isValidCSSColor(token.text, this.cssColor4)) {
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this._appendColor(token.text, options);
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} else if (angleOK(token.text)) {
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this._appendAngle(token.text, options);
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} else {
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this._appendTextNode(text.substring(token.startOffset,
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token.endOffset));
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}
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break;
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case "id":
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case "hash": {
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let original = text.substring(token.startOffset, token.endOffset);
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if (colorOK() && colorUtils.isValidCSSColor(original, this.cssColor4)) {
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if (spaceNeeded) {
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// Insert a space to prevent token pasting when a #xxx
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// color is changed to something like rgb(...).
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this._appendTextNode(" ");
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}
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this._appendColor(original, options);
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} else {
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this._appendTextNode(original);
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}
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break;
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}
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case "dimension":
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let value = text.substring(token.startOffset, token.endOffset);
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if (angleOK(value)) {
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this._appendAngle(value, options);
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} else {
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this._appendTextNode(value);
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}
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break;
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case "url":
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case "bad_url":
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this._appendURL(text.substring(token.startOffset, token.endOffset),
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token.text, options);
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break;
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case "symbol":
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if (token.text === "(") {
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++parenDepth;
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} else if (token.text === ")") {
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--parenDepth;
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if (parenDepth === 0) {
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outerMostFunctionTakesColor = false;
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}
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}
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// falls through
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default:
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this._appendTextNode(
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text.substring(token.startOffset, token.endOffset));
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break;
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}
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// If this token might possibly introduce token pasting when
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// color-cycling, require a space.
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spaceNeeded = (token.tokenType === "ident" || token.tokenType === "at" ||
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token.tokenType === "id" || token.tokenType === "hash" ||
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token.tokenType === "number" || token.tokenType === "dimension" ||
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token.tokenType === "percentage" || token.tokenType === "dimension");
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}
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let result = this._toDOM();
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if (options.expectFilter && !options.filterSwatch) {
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result = this._wrapFilter(text, options, result);
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}
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return result;
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},
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/**
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* Append a cubic-bezier timing function value to the output
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*
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* @param {String} bezier
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* The cubic-bezier timing function
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* @param {Object} options
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* Options object. For valid options and default values see
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* _mergeOptions()
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*/
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_appendCubicBezier: function (bezier, options) {
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let container = this._createNode("span", {
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"data-bezier": bezier
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});
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if (options.bezierSwatchClass) {
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let swatch = this._createNode("span", {
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class: options.bezierSwatchClass
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});
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container.appendChild(swatch);
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}
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let value = this._createNode("span", {
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class: options.bezierClass
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}, bezier);
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container.appendChild(value);
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this.parsed.push(container);
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},
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/**
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* Append a CSS Grid highlighter toggle icon next to the value in a
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* 'display: grid' declaration
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*
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* @param {String} grid
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* The grid text value to append
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* @param {Object} options
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* Options object. For valid options and default values see
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* _mergeOptions()
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*/
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_appendGrid: function (grid, options) {
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let container = this._createNode("span", {});
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let toggle = this._createNode("span", {
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class: options.gridClass
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});
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let value = this._createNode("span", {});
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value.textContent = grid;
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container.appendChild(toggle);
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container.appendChild(value);
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this.parsed.push(container);
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},
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/**
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* Append a angle value to the output
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*
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* @param {String} angle
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* angle to append
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* @param {Object} options
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* Options object. For valid options and default values see
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* _mergeOptions()
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*/
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_appendAngle: function (angle, options) {
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let angleObj = new angleUtils.CssAngle(angle);
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let container = this._createNode("span", {
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"data-angle": angle
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});
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if (options.angleSwatchClass) {
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let swatch = this._createNode("span", {
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class: options.angleSwatchClass
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});
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this.angleSwatches.set(swatch, angleObj);
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swatch.addEventListener("mousedown", this._onAngleSwatchMouseDown);
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// Add click listener to stop event propagation when shift key is pressed
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// in order to prevent the value input to be focused.
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// Bug 711942 will add a tooltip to edit angle values and we should
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// be able to move this listener to Tooltip.js when it'll be implemented.
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swatch.addEventListener("click", function (event) {
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if (event.shiftKey) {
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event.stopPropagation();
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}
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});
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EventEmitter.decorate(swatch);
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container.appendChild(swatch);
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}
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let value = this._createNode("span", {
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class: options.angleClass
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}, angle);
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container.appendChild(value);
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this.parsed.push(container);
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},
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/**
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* Check if a CSS property supports a specific value.
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*
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* @param {String} name
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* CSS Property name to check
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* @param {String} value
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* CSS Property value to check
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*/
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_cssPropertySupportsValue: function (name, value) {
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return this.isValidOnClient(name, value, this.doc);
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},
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/**
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* Tests if a given colorObject output by CssColor is valid for parsing.
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* Valid means it's really a color, not any of the CssColor SPECIAL_VALUES
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* except transparent
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*/
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_isValidColor: function (colorObj) {
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return colorObj.valid &&
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(!colorObj.specialValue || colorObj.specialValue === "transparent");
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},
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/**
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* Append a color to the output.
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*
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* @param {String} color
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* Color to append
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* @param {Object} [options]
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* Options object. For valid options and default values see
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* _mergeOptions().
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*/
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_appendColor: function (color, options = {}) {
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let colorObj = new colorUtils.CssColor(color, this.cssColor4);
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if (this._isValidColor(colorObj)) {
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let container = this._createNode("span", {
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"data-color": color
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});
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if (options.colorSwatchClass) {
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let swatch = this._createNode("span", {
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class: options.colorSwatchClass,
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style: "background-color:" + color
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});
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this.colorSwatches.set(swatch, colorObj);
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swatch.addEventListener("mousedown", this._onColorSwatchMouseDown);
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EventEmitter.decorate(swatch);
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container.appendChild(swatch);
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}
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if (options.defaultColorType) {
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color = colorObj.toString();
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container.dataset.color = color;
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}
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let value = this._createNode("span", {
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class: options.colorClass
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}, color);
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container.appendChild(value);
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this.parsed.push(container);
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} else {
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this._appendTextNode(color);
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}
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},
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/**
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* Wrap some existing nodes in a filter editor.
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*
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* @param {String} filters
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* The full text of the "filter" property.
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* @param {object} options
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* The options object passed to parseCssProperty().
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* @param {object} nodes
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* Nodes created by _toDOM().
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*
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* @returns {object}
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* A new node that supplies a filter swatch and that wraps |nodes|.
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*/
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_wrapFilter: function (filters, options, nodes) {
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let container = this._createNode("span", {
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"data-filters": filters
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});
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if (options.filterSwatchClass) {
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let swatch = this._createNode("span", {
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class: options.filterSwatchClass
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});
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container.appendChild(swatch);
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}
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let value = this._createNode("span", {
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class: options.filterClass
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});
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value.appendChild(nodes);
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container.appendChild(value);
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return container;
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},
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_onColorSwatchMouseDown: function (event) {
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if (!event.shiftKey) {
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return;
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}
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// Prevent click event to be fired to not show the tooltip
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event.stopPropagation();
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let swatch = event.target;
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let color = this.colorSwatches.get(swatch);
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let val = color.nextColorUnit();
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swatch.nextElementSibling.textContent = val;
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swatch.emit("unit-change", val);
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},
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_onAngleSwatchMouseDown: function (event) {
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if (!event.shiftKey) {
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return;
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}
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event.stopPropagation();
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let swatch = event.target;
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let angle = this.angleSwatches.get(swatch);
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let val = angle.nextAngleUnit();
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swatch.nextElementSibling.textContent = val;
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swatch.emit("unit-change", val);
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},
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/**
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* A helper function that sanitizes a possibly-unterminated URL.
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*/
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_sanitizeURL: function (url) {
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// Re-lex the URL and add any needed termination characters.
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let urlTokenizer = getCSSLexer(url);
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// Just read until EOF; there will only be a single token.
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while (urlTokenizer.nextToken()) {
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// Nothing.
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}
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return urlTokenizer.performEOFFixup(url, true);
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},
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/**
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* Append a URL to the output.
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*
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* @param {String} match
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* Complete match that may include "url(xxx)"
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* @param {String} url
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* Actual URL
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* @param {Object} [options]
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* Options object. For valid options and default values see
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* _mergeOptions().
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*/
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_appendURL: function (match, url, options) {
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if (options.urlClass) {
|
||
// Sanitize the URL. Note that if we modify the URL, we just
|
||
// leave the termination characters. This isn't strictly
|
||
// "as-authored", but it makes a bit more sense.
|
||
match = this._sanitizeURL(match);
|
||
// This regexp matches a URL token. It puts the "url(", any
|
||
// leading whitespace, and any opening quote into |leader|; the
|
||
// URL text itself into |body|, and any trailing quote, trailing
|
||
// whitespace, and the ")" into |trailer|. We considered adding
|
||
// functionality for this to CSSLexer, in some way, but this
|
||
// seemed simpler on the whole.
|
||
let [, leader, , body, trailer] =
|
||
/^(url\([ \t\r\n\f]*(["']?))(.*?)(\2[ \t\r\n\f]*\))$/i.exec(match);
|
||
|
||
this._appendTextNode(leader);
|
||
|
||
let href = url;
|
||
if (options.baseURI) {
|
||
try {
|
||
href = new URL(url, options.baseURI).href;
|
||
} catch (e) {
|
||
// Ignore.
|
||
}
|
||
}
|
||
|
||
this._appendNode("a", {
|
||
target: "_blank",
|
||
class: options.urlClass,
|
||
href: href
|
||
}, body);
|
||
|
||
this._appendTextNode(trailer);
|
||
} else {
|
||
this._appendTextNode(match);
|
||
}
|
||
},
|
||
|
||
/**
|
||
* Create a node.
|
||
*
|
||
* @param {String} tagName
|
||
* Tag type e.g. "div"
|
||
* @param {Object} attributes
|
||
* e.g. {class: "someClass", style: "cursor:pointer"};
|
||
* @param {String} [value]
|
||
* If a value is included it will be appended as a text node inside
|
||
* the tag. This is useful e.g. for span tags.
|
||
* @return {Node} Newly created Node.
|
||
*/
|
||
_createNode: function (tagName, attributes, value = "") {
|
||
let node = this.doc.createElementNS(HTML_NS, tagName);
|
||
let attrs = Object.getOwnPropertyNames(attributes);
|
||
|
||
for (let attr of attrs) {
|
||
if (attributes[attr]) {
|
||
node.setAttribute(attr, attributes[attr]);
|
||
}
|
||
}
|
||
|
||
if (value) {
|
||
let textNode = this.doc.createTextNode(value);
|
||
node.appendChild(textNode);
|
||
}
|
||
|
||
return node;
|
||
},
|
||
|
||
/**
|
||
* Append a node to the output.
|
||
*
|
||
* @param {String} tagName
|
||
* Tag type e.g. "div"
|
||
* @param {Object} attributes
|
||
* e.g. {class: "someClass", style: "cursor:pointer"};
|
||
* @param {String} [value]
|
||
* If a value is included it will be appended as a text node inside
|
||
* the tag. This is useful e.g. for span tags.
|
||
*/
|
||
_appendNode: function (tagName, attributes, value = "") {
|
||
let node = this._createNode(tagName, attributes, value);
|
||
this.parsed.push(node);
|
||
},
|
||
|
||
/**
|
||
* Append a text node to the output. If the previously output item was a text
|
||
* node then we append the text to that node.
|
||
*
|
||
* @param {String} text
|
||
* Text to append
|
||
*/
|
||
_appendTextNode: function (text) {
|
||
let lastItem = this.parsed[this.parsed.length - 1];
|
||
if (typeof lastItem === "string") {
|
||
this.parsed[this.parsed.length - 1] = lastItem + text;
|
||
} else {
|
||
this.parsed.push(text);
|
||
}
|
||
},
|
||
|
||
/**
|
||
* Take all output and append it into a single DocumentFragment.
|
||
*
|
||
* @return {DocumentFragment}
|
||
* Document Fragment
|
||
*/
|
||
_toDOM: function () {
|
||
let frag = this.doc.createDocumentFragment();
|
||
|
||
for (let item of this.parsed) {
|
||
if (typeof item === "string") {
|
||
frag.appendChild(this.doc.createTextNode(item));
|
||
} else {
|
||
frag.appendChild(item);
|
||
}
|
||
}
|
||
|
||
this.parsed.length = 0;
|
||
return frag;
|
||
},
|
||
|
||
/**
|
||
* Merges options objects. Default values are set here.
|
||
*
|
||
* @param {Object} overrides
|
||
* The option values to override e.g. _mergeOptions({colors: false})
|
||
*
|
||
* Valid options are:
|
||
* - defaultColorType: true // Convert colors to the default type
|
||
* // selected in the options panel.
|
||
* - angleClass: "" // The class to use for the angle value
|
||
* // that follows the swatch.
|
||
* - angleSwatchClass: "" // The class to use for angle swatches.
|
||
* - bezierClass: "" // The class to use for the bezier value
|
||
* // that follows the swatch.
|
||
* - bezierSwatchClass: "" // The class to use for bezier swatches.
|
||
* - colorClass: "" // The class to use for the color value
|
||
* // that follows the swatch.
|
||
* - colorSwatchClass: "" // The class to use for color swatches.
|
||
* - filterSwatch: false // A special case for parsing a
|
||
* // "filter" property, causing the
|
||
* // parser to skip the call to
|
||
* // _wrapFilter. Used only for
|
||
* // previewing with the filter swatch.
|
||
* - gridClass: "" // The class to use for the grid icon.
|
||
* - supportsColor: false // Does the CSS property support colors?
|
||
* - urlClass: "" // The class to be used for url() links.
|
||
* - baseURI: undefined // A string used to resolve
|
||
* // relative links.
|
||
* @return {Object}
|
||
* Overridden options object
|
||
*/
|
||
_mergeOptions: function (overrides) {
|
||
let defaults = {
|
||
defaultColorType: true,
|
||
angleClass: "",
|
||
angleSwatchClass: "",
|
||
bezierClass: "",
|
||
bezierSwatchClass: "",
|
||
colorClass: "",
|
||
colorSwatchClass: "",
|
||
filterSwatch: false,
|
||
gridClass: "",
|
||
supportsColor: false,
|
||
urlClass: "",
|
||
baseURI: undefined,
|
||
};
|
||
|
||
for (let item in overrides) {
|
||
defaults[item] = overrides[item];
|
||
}
|
||
return defaults;
|
||
}
|
||
};
|
||
|
||
module.exports = OutputParser;
|