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https://gitlab.winehq.org/wine/wine-gecko.git
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447 lines
11 KiB
JavaScript
447 lines
11 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 {Services} = Cu.import("resource://gre/modules/Services.jsm", {});
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const COLOR_UNIT_PREF = "devtools.defaultColorUnit";
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const REGEX_JUST_QUOTES = /^""$/;
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const REGEX_RGB_3_TUPLE = /^rgb\(([\d.]+),\s*([\d.]+),\s*([\d.]+)\)$/i;
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const REGEX_RGBA_4_TUPLE = /^rgba\(([\d.]+),\s*([\d.]+),\s*([\d.]+),\s*([\d.]+|1|0)\)$/i;
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const REGEX_HSL_3_TUPLE = /^\bhsl\(([\d.]+),\s*([\d.]+%),\s*([\d.]+%)\)$/i;
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/**
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* This regex matches:
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* - #F00
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* - #FF0000
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* - hsl()
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* - hsla()
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* - rgb()
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* - rgba()
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* - red
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*
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* It also matches css keywords e.g. "background-color" otherwise
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* "background" would be replaced with #6363CE ("background" is a platform
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* color).
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*/
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const REGEX_ALL_COLORS = /#[0-9a-fA-F]{3}\b|#[0-9a-fA-F]{6}\b|hsl\(.*?\)|hsla\(.*?\)|rgba?\(.*?\)|\b[a-zA-Z-]+\b/g;
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const SPECIALVALUES = new Set([
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"currentcolor",
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"initial",
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"inherit",
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"transparent",
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"unset"
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]);
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/**
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* This module is used to convert between various color types.
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*
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* Usage:
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* let {devtools} = Cu.import("resource://gre/modules/devtools/Loader.jsm", {});
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* let {colorUtils} = devtools.require("devtools/css-color");
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* let color = new colorUtils.CssColor("red");
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*
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* color.authored === "red"
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* color.hasAlpha === false
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* color.valid === true
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* color.transparent === false // transparent has a special status.
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* color.name === "red" // returns hex or rgba when no name available.
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* color.hex === "#F00" // returns shortHex when available else returns
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* longHex. If alpha channel is present then we
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* return this.rgba.
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* color.longHex === "#FF0000" // If alpha channel is present then we return
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* this.rgba.
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* color.rgb === "rgb(255, 0, 0)" // If alpha channel is present then we return
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* this.rgba.
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* color.rgba === "rgba(255, 0, 0, 1)"
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* color.hsl === "hsl(0, 100%, 50%)"
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* color.hsla === "hsla(0, 100%, 50%, 1)" // If alpha channel is present
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* then we return this.rgba.
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*
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* color.toString() === "#F00"; // Outputs the color type determined in the
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* COLOR_UNIT_PREF constant (above).
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* // Color objects can be reused
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* color.newColor("green") === "#0F0"; // true
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*
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* let processed = colorUtils.processCSSString("color:red; background-color:green;");
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* // Returns "color:#F00; background-color:#0F0;"
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*
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* Valid values for COLOR_UNIT_PREF are contained in CssColor.COLORUNIT.
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*/
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function CssColor(colorValue) {
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this.newColor(colorValue);
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}
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module.exports.colorUtils = {
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CssColor: CssColor,
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processCSSString: processCSSString,
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rgbToHsl: rgbToHsl
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};
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/**
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* Values used in COLOR_UNIT_PREF
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*/
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CssColor.COLORUNIT = {
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"authored": "authored",
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"hex": "hex",
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"name": "name",
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"rgb": "rgb",
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"hsl": "hsl"
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};
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CssColor.prototype = {
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authored: null,
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get hasAlpha() {
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if (!this.valid) {
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return false;
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}
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return this._getRGBATuple().a !== 1;
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},
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get valid() {
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return this._validateColor(this.authored);
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},
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/**
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* Return true for all transparent values e.g. rgba(0, 0, 0, 0).
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*/
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get transparent() {
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try {
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let tuple = this._getRGBATuple();
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return !(tuple.r || tuple.g || tuple.b || tuple.a);
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} catch(e) {
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return false;
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}
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},
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get specialValue() {
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return SPECIALVALUES.has(this.authored) ? this.authored : null;
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},
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get name() {
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if (!this.valid) {
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return "";
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}
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if (this.specialValue) {
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return this.specialValue;
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}
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try {
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let tuple = this._getRGBATuple();
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if (tuple.a !== 1) {
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return this.rgb;
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}
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let {r, g, b} = tuple;
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return DOMUtils.rgbToColorName(r, g, b);
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} catch(e) {
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return this.hex;
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}
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},
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get hex() {
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if (!this.valid) {
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return "";
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}
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if (this.specialValue) {
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return this.specialValue;
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}
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if (this.hasAlpha) {
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return this.rgba;
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}
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let hex = this.longHex;
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if (hex.charAt(1) == hex.charAt(2) &&
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hex.charAt(3) == hex.charAt(4) &&
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hex.charAt(5) == hex.charAt(6)) {
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hex = "#" + hex.charAt(1) + hex.charAt(3) + hex.charAt(5);
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}
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return hex;
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},
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get longHex() {
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if (!this.valid) {
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return "";
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}
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if (this.specialValue) {
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return this.specialValue;
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}
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if (this.hasAlpha) {
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return this.rgba;
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}
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return this.rgb.replace(/\brgb\((\d{1,3}),\s*(\d{1,3}),\s*(\d{1,3})\)/gi, function(_, r, g, b) {
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return "#" + ((1 << 24) + (r << 16) + (g << 8) + (b << 0)).toString(16).substr(-6).toUpperCase();
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});
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},
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get rgb() {
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if (!this.valid) {
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return "";
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}
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if (this.specialValue) {
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return this.specialValue;
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}
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if (!this.hasAlpha) {
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if (this.authored.startsWith("rgb(")) {
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// The color is valid and begins with rgb(. Return the authored value.
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return this.authored;
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}
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let tuple = this._getRGBATuple();
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return "rgb(" + tuple.r + ", " + tuple.g + ", " + tuple.b + ")";
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}
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return this.rgba;
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},
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get rgba() {
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if (!this.valid) {
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return "";
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}
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if (this.specialValue) {
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return this.specialValue;
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}
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if (this.authored.startsWith("rgba(")) {
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// The color is valid and begins with rgba(. Return the authored value.
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return this.authored;
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}
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let components = this._getRGBATuple();
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return "rgba(" + components.r + ", " +
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components.g + ", " +
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components.b + ", " +
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components.a + ")";
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},
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get hsl() {
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if (!this.valid) {
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return "";
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}
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if (this.specialValue) {
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return this.specialValue;
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}
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if (this.authored.startsWith("hsl(")) {
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// The color is valid and begins with hsl(. Return the authored value.
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return this.authored;
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}
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if (this.hasAlpha) {
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return this.hsla;
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}
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return this._hslNoAlpha();
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},
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get hsla() {
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if (!this.valid) {
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return "";
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}
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if (this.specialValue) {
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return this.specialValue;
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}
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if (this.authored.startsWith("hsla(")) {
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// The color is valid and begins with hsla(. Return the authored value.
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return this.authored;
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}
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if (this.hasAlpha) {
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let a = this._getRGBATuple().a;
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return this._hslNoAlpha().replace("hsl", "hsla").replace(")", ", " + a + ")");
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}
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return this._hslNoAlpha().replace("hsl", "hsla").replace(")", ", 1)");
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},
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/**
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* Change color
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*
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* @param {String} color
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* Any valid color string
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*/
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newColor: function(color) {
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this.authored = color.toLowerCase();
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return this;
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},
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/**
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* Return a string representing a color of type defined in COLOR_UNIT_PREF.
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*/
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toString: function() {
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let color;
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let defaultUnit = Services.prefs.getCharPref(COLOR_UNIT_PREF);
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let unit = CssColor.COLORUNIT[defaultUnit];
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switch(unit) {
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case CssColor.COLORUNIT.authored:
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color = this.authored;
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break;
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case CssColor.COLORUNIT.hex:
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color = this.hex;
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break;
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case CssColor.COLORUNIT.hsl:
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color = this.hsl;
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break;
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case CssColor.COLORUNIT.name:
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color = this.name;
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break;
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case CssColor.COLORUNIT.rgb:
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color = this.rgb;
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break;
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default:
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color = this.rgb;
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}
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return color;
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},
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/**
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* Returns a RGBA 4-Tuple representation of a color or transparent as
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* appropriate.
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*/
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_getRGBATuple: function() {
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let win = Services.appShell.hiddenDOMWindow;
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let doc = win.document;
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let span = doc.createElement("span");
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span.style.color = this.authored;
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let computed = win.getComputedStyle(span).color;
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if (computed === "transparent") {
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return {r: 0, g: 0, b: 0, a: 0};
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}
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let rgba = computed.match(REGEX_RGBA_4_TUPLE);
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if (rgba) {
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let [, r, g, b, a] = rgba;
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return {r: r, g: g, b: b, a: a};
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} else {
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let rgb = computed.match(REGEX_RGB_3_TUPLE);
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let [, r, g, b] = rgb;
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return {r: r, g: g, b: b, a: 1};
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}
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},
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_hslNoAlpha: function() {
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let {r, g, b} = this._getRGBATuple();
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if (this.authored.startsWith("hsl(")) {
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// We perform string manipulations on our output so let's ensure that it
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// is formatted as we expect.
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let [, h, s, l] = this.authored.match(REGEX_HSL_3_TUPLE);
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return "hsl(" + h + ", " + s + ", " + l + ")";
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}
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let [h,s,l] = rgbToHsl([r,g,b]);
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return "hsl(" + h + ", " + s + "%, " + l + "%)";
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},
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/**
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* This method allows comparison of CssColor objects using ===.
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*/
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valueOf: function() {
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return this.rgba;
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},
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_validateColor: function(color) {
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if (typeof color !== "string" || color === "") {
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return false;
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}
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let win = Services.appShell.hiddenDOMWindow;
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let doc = win.document;
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// Create a black span in a hidden window.
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let span = doc.createElement("span");
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span.style.color = "rgb(0, 0, 0)";
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// Attempt to set the color. If the color is no longer black we know that
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// color is valid.
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span.style.color = color;
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if (span.style.color !== "rgb(0, 0, 0)") {
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return true;
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}
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// If the color is black then the above check will have failed. We change
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// the span to white and attempt to reapply the color. If the span is not
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// white then we know that the color is valid otherwise we return invalid.
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span.style.color = "rgb(255, 255, 255)";
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span.style.color = color;
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return span.style.color !== "rgb(255, 255, 255)";
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},
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};
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/**
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* Process a CSS string
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*
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* @param {String} value
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* CSS string e.g. "color:red; background-color:green;"
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* @return {String}
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* Converted CSS String e.g. "color:#F00; background-color:#0F0;"
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*/
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function processCSSString(value) {
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if (value && REGEX_JUST_QUOTES.test(value)) {
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return value;
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}
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let colorPattern = REGEX_ALL_COLORS;
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value = value.replace(colorPattern, function(match) {
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let color = new CssColor(match);
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if (color.valid) {
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return color;
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}
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return match;
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});
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return value;
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}
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/**
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* Convert rgb value to hsl
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*
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* @param {array} rgb
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* Array of rgb values
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* @return {array}
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* Array of hsl values.
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*/
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function rgbToHsl([r,g,b]) {
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r = r / 255;
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g = g / 255;
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b = b / 255;
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let max = Math.max(r, g, b);
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let min = Math.min(r, g, b);
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let h;
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let s;
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let l = (max + min) / 2;
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if(max == min){
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h = s = 0;
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} else {
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let d = max - min;
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s = l > 0.5 ? d / (2 - max - min) : d / (max + min);
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switch(max) {
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case r:
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h = ((g - b) / d) % 6;
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break;
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case g:
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h = (b - r) / d + 2;
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break;
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case b:
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h = (r - g) / d + 4;
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break;
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}
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h *= 60;
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if (h < 0) {
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h += 360;
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}
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}
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return [Math.round(h), Math.round(s * 100), Math.round(l * 100)];
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}
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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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