forked from mirrors/gecko-dev
e8e8df02e7
--HG-- extra : commitid : 2WUp20yv0ej extra : rebase_source : cbc4ae0914a0028f32454197ee4e8e347f9fd7cf
57 lines
2.1 KiB
JavaScript
57 lines
2.1 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 { Ci } = require("chrome");
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const { open } = require("../event/dom");
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const { observe } = require("../event/chrome");
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const { filter, merge, map, expand } = require("../event/utils");
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const { windows } = require("../window/utils");
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const { events: windowEvents } = require("sdk/window/events");
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// Note: Please note that even though pagehide event is included
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// it's not observable reliably since it's not always triggered
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// when closing tabs. Implementation can be imrpoved once that
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// event will be necessary.
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var TYPES = ["DOMContentLoaded", "load", "pageshow", "pagehide"];
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var insert = observe("document-element-inserted");
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var windowCreate = merge([
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observe("content-document-global-created"),
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observe("chrome-document-global-created")
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]);
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var create = map(windowCreate, function({target, data, type}) {
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return { target: target.document, type: type, data: data }
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});
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function streamEventsFrom({document}) {
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// Map supported event types to a streams of those events on the given
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// `window` for the inserted document and than merge these streams into
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// single form stream off all window state change events.
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let stateChanges = TYPES.map(function(type) {
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return open(document, type, { capture: true });
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});
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// Since load events on document occur for every loded resource
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return filter(merge(stateChanges), function({target}) {
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return target instanceof Ci.nsIDOMDocument
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})
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}
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exports.streamEventsFrom = streamEventsFrom;
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var opened = windows(null, { includePrivate: true });
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var state = merge(opened.map(streamEventsFrom));
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var futureReady = filter(windowEvents, ({type}) =>
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type === "DOMContentLoaded");
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var futureWindows = map(futureReady, ({target}) => target);
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var futureState = expand(futureWindows, streamEventsFrom);
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exports.events = merge([insert, create, state, futureState]);
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