42 lines
1.2 KiB
JavaScript
42 lines
1.2 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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const {
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TYPES: { CSS_CHANGE },
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} = require("resource://devtools/server/actors/resources/index.js");
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const TrackChangeEmitter = require("resource://devtools/server/actors/utils/track-change-emitter.js");
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/**
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* Start watching for all css changes related to a given Target Actor.
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*
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* @param TargetActor targetActor
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* The target actor from which we should observe css changes.
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* @param Object options
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* Dictionary object with following attributes:
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* - onAvailable: mandatory function
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* This will be called for each resource.
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*/
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class CSSChangeWatcher {
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constructor() {
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this.onTrackChange = this.onTrackChange.bind(this);
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}
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async watch(targetActor, { onAvailable }) {
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this.onAvailable = onAvailable;
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TrackChangeEmitter.on("track-change", this.onTrackChange);
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}
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onTrackChange(change) {
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change.resourceType = CSS_CHANGE;
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this.onAvailable([change]);
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}
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destroy() {
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TrackChangeEmitter.off("track-change", this.onTrackChange);
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}
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}
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module.exports = CSSChangeWatcher;
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