82 lines
2.2 KiB
JavaScript
82 lines
2.2 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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module.metadata = {
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"stability": "experimental"
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};
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const { Cc, Ci } = require("chrome");
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const { Class } = require("../core/heritage");
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const { ns } = require("../core/namespace");
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const { URL } = require('../url');
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const events = require("../system/events");
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const { loadSheet, removeSheet, isTypeValid } = require("./utils");
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const { isString } = require("../lang/type");
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const { attachTo, detachFrom, getTargetWindow } = require("../content/mod");
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const { freeze, create } = Object;
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const LOCAL_URI_SCHEMES = ['resource', 'data'];
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function isLocalURL(item) {
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try {
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return LOCAL_URI_SCHEMES.indexOf(URL(item).scheme) > -1;
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}
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catch(e) {}
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return false;
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}
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function Style({ source, uri, type }) {
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source = source == null ? null : freeze([].concat(source));
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uri = uri == null ? null : freeze([].concat(uri));
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type = type == null ? "author" : type;
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if (source && !source.every(isString))
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throw new Error('Style.source must be a string or an array of strings.');
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if (uri && !uri.every(isLocalURL))
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throw new Error('Style.uri must be a local URL or an array of local URLs');
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if (type && !isTypeValid(type))
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throw new Error('Style.type must be "agent", "user" or "author"');
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return freeze(create(Style.prototype, {
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"source": { value: source, enumerable: true },
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"uri": { value: uri, enumerable: true },
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"type": { value: type, enumerable: true }
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}));
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};
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exports.Style = Style;
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attachTo.define(Style, function (style, window) {
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if (style.uri) {
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for (let uri of style.uri)
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loadSheet(window, uri, style.type);
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}
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if (style.source) {
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let uri = "data:text/css;charset=utf-8,";
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uri += encodeURIComponent(style.source.join(""));
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loadSheet(window, uri, style.type);
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}
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});
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detachFrom.define(Style, function (style, window) {
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if (style.uri)
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for (let uri of style.uri)
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removeSheet(window, uri);
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if (style.source) {
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let uri = "data:text/css;charset=utf-8,";
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uri += encodeURIComponent(style.source.join(""));
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removeSheet(window, uri, style.type);
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}
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});
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