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https://github.com/classilla/tenfourfox.git
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598 lines
18 KiB
JavaScript
598 lines
18 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 {Cc, Ci, Cu} = require("chrome");
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const {colorUtils} = require("devtools/shared/css-color");
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const {Services} = Cu.import("resource://gre/modules/Services.jsm", {});
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const HTML_NS = "http://www.w3.org/1999/xhtml";
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const BEZIER_KEYWORDS = ["linear", "ease-in-out", "ease-in", "ease-out",
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"ease"];
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// Functions that accept a color argument.
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const COLOR_TAKING_FUNCTIONS = ["linear-gradient",
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"-moz-linear-gradient",
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"repeating-linear-gradient",
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"-moz-repeating-linear-gradient",
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"radial-gradient",
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"-moz-radial-gradient",
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"repeating-radial-gradient",
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"-moz-repeating-radial-gradient",
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"drop-shadow"];
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loader.lazyGetter(this, "DOMUtils", function() {
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return Cc["@mozilla.org/inspector/dom-utils;1"].getService(Ci.inIDOMUtils);
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});
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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 {require} =
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* Cu.import("resource://devtools/shared/Loader.jsm", {});
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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);
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*
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* parser.parseCssProperty("color", "red"); // Returns document fragment.
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*/
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function OutputParser(document) {
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this.parsed = [];
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this.doc = document;
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this.colorSwatches = new WeakMap();
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this._onSwatchMouseDown = this._onSwatchMouseDown.bind(this);
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}
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exports.OutputParser = OutputParser;
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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 =
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safeCssPropertySupportsType(name, DOMUtils.TYPE_TIMING_FUNCTION);
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options.expectFilter = name === "filter";
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options.supportsColor =
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safeCssPropertySupportsType(name, DOMUtils.TYPE_COLOR) ||
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safeCssPropertySupportsType(name, DOMUtils.TYPE_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 = DOMUtils.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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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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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.indexOf(token.text) >= 0) {
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// The function can accept a color 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 colors
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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 = true;
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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() && DOMUtils.isValidCSSColor(functionText)) {
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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 (colorOK() && DOMUtils.isValidCSSColor(token.text)) {
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this._appendColor(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() && DOMUtils.isValidCSSColor(original)) {
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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 "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.token === ")") {
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--parenDepth;
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}
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// falls through
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default:
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this._appendTextNode(text.substring(token.startOffset,
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token.endOffset));
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break;
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}
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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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* 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 DOMUtils.cssPropertyIsValid(name, value);
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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);
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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._onSwatchMouseDown, false);
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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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_onSwatchMouseDown: function(event) {
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// Prevent text selection in the case of shift-click or double-click.
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event.preventDefault();
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if (!event.shiftKey) {
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return;
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}
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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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},
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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 = DOMUtils.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) {
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// Sanitize the URL. Note that if we modify the URL, we just
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// leave the termination characters. This isn't strictly
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// "as-authored", but it makes a bit more sense.
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match = this._sanitizeURL(match);
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// This regexp matches a URL token. It puts the "url(", any
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// leading whitespace, and any opening quote into |leader|; the
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// URL text itself into |body|, and any trailing quote, trailing
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// whitespace, and the ")" into |trailer|. We considered adding
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// functionality for this to CSSLexer, in some way, but this
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// seemed simpler on the whole.
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let [, leader, , body, trailer] =
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/^(url\([ \t\r\n\f]*(["']?))(.*?)(\2[ \t\r\n\f]*\))$/i.exec(match);
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this._appendTextNode(leader);
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let href = url;
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if (options.baseURI) {
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href = options.baseURI.resolve(url);
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}
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this._appendNode("a", {
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target: "_blank",
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class: options.urlClass,
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href: href
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}, body);
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this._appendTextNode(trailer);
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} else {
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this._appendTextNode(match);
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}
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},
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/**
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* Create a node.
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*
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* @param {String} tagName
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* Tag type e.g. "div"
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* @param {Object} attributes
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* e.g. {class: "someClass", style: "cursor:pointer"};
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* @param {String} [value]
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* If a value is included it will be appended as a text node inside
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* the tag. This is useful e.g. for span tags.
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* @return {Node} Newly created Node.
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*/
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_createNode: function(tagName, attributes, value="") {
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let node = this.doc.createElementNS(HTML_NS, tagName);
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let attrs = Object.getOwnPropertyNames(attributes);
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for (let attr of attrs) {
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if (attributes[attr]) {
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node.setAttribute(attr, attributes[attr]);
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}
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}
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if (value) {
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let textNode = this.doc.createTextNode(value);
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node.appendChild(textNode);
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}
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return node;
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},
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/**
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* Append a node to the output.
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*
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* @param {String} tagName
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* Tag type e.g. "div"
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* @param {Object} attributes
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* e.g. {class: "someClass", style: "cursor:pointer"};
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* @param {String} [value]
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* If a value is included it will be appended as a text node inside
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* the tag. This is useful e.g. for span tags.
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*/
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_appendNode: function(tagName, attributes, value="") {
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let node = this._createNode(tagName, attributes, value);
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this.parsed.push(node);
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},
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/**
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* Append a text node to the output. If the previously output item was a text
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* node then we append the text to that node.
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*
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* @param {String} text
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* Text to append
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*/
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_appendTextNode: function(text) {
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let lastItem = this.parsed[this.parsed.length - 1];
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if (typeof lastItem === "string") {
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this.parsed[this.parsed.length - 1] = lastItem + text;
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} else {
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this.parsed.push(text);
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}
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},
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/**
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* Take all output and append it into a single DocumentFragment.
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*
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* @return {DocumentFragment}
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* Document Fragment
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*/
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_toDOM: function() {
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let frag = this.doc.createDocumentFragment();
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for (let item of this.parsed) {
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if (typeof item === "string") {
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frag.appendChild(this.doc.createTextNode(item));
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} else {
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frag.appendChild(item);
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}
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}
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this.parsed.length = 0;
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return frag;
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},
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/**
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* Merges options objects. Default values are set here.
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*
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* @param {Object} overrides
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* The option values to override e.g. _mergeOptions({colors: false})
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*
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* Valid options are:
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* - defaultColorType: true // Convert colors to the default type
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* // selected in the options panel.
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* - colorSwatchClass: "" // The class to use for color swatches.
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* - colorClass: "" // The class to use for the color value
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* // that follows the swatch.
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* - bezierSwatchClass: "" // The class to use for bezier swatches.
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* - bezierClass: "" // The class to use for the bezier value
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* // that follows the swatch.
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* - supportsColor: false // Does the CSS property support colors?
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* - urlClass: "" // The class to be used for url() links.
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||
* - baseURI: "" // A string or nsIURI used to resolve
|
||
* // relative links.
|
||
* - 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.
|
||
* @return {Object}
|
||
* Overridden options object
|
||
*/
|
||
_mergeOptions: function(overrides) {
|
||
let defaults = {
|
||
defaultColorType: true,
|
||
colorSwatchClass: "",
|
||
colorClass: "",
|
||
bezierSwatchClass: "",
|
||
bezierClass: "",
|
||
supportsColor: false,
|
||
urlClass: "",
|
||
baseURI: "",
|
||
filterSwatch: false
|
||
};
|
||
|
||
if (typeof overrides.baseURI === "string") {
|
||
overrides.baseURI = Services.io.newURI(overrides.baseURI, null, null);
|
||
}
|
||
|
||
for (let item in overrides) {
|
||
defaults[item] = overrides[item];
|
||
}
|
||
return defaults;
|
||
}
|
||
};
|
||
|
||
/**
|
||
* A wrapper for DOMUtils.cssPropertySupportsType that ignores invalid
|
||
* properties.
|
||
*
|
||
* @param {String} name The property name.
|
||
* @param {number} type The type tested for support.
|
||
* @return {Boolean} Whether the property supports the type.
|
||
* If the property is unknown, false is returned.
|
||
*/
|
||
function safeCssPropertySupportsType(name, type) {
|
||
try {
|
||
return DOMUtils.cssPropertySupportsType(name, type);
|
||
} catch(e) {
|
||
return false;
|
||
}
|
||
}
|