зеркало из https://github.com/mozilla/gecko-dev.git
84 строки
2.6 KiB
JavaScript
84 строки
2.6 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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const { classes: Cc, interfaces: Ci, utils: Cu } = Components;
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Cu.import("resource://gre/modules/XPCOMUtils.jsm");
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Cu.import('resource://gre/modules/Services.jsm');
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const BASE_PREF = "dom.ipc.processCount"
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const PREF_BRANCH = BASE_PREF + ".";
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// Utilities:
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function getMaxContentParents(processType) {
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// If the pref doesn't exist, get the default number of processes.
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// If there's no pref, use only one process.
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return Services.prefs.getIntPref(PREF_BRANCH + processType,
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Services.prefs.getIntPref(BASE_PREF, 1));
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}
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// Fills up aProcesses until max and then selects randomly from the available
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// ones.
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function RandomSelector() {
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}
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RandomSelector.prototype = {
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classID: Components.ID("{c616fcfd-9737-41f1-aa74-cee72a38f91b}"),
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QueryInterface: XPCOMUtils.generateQI([Ci.nsIContentProcessProvider]),
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provideProcess(aType, aOpener, aProcesses, aCount) {
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let maxContentParents = getMaxContentParents(aType);
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if (aCount < maxContentParents) {
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return Ci.nsIContentProcessProvider.NEW_PROCESS;
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}
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let startIdx = Math.floor(Math.random() * maxContentParents);
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let curIdx = startIdx;
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do {
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if (aProcesses[curIdx].opener === aOpener) {
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return curIdx;
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}
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curIdx = (curIdx + 1) % maxContentParents;
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} while (curIdx !== startIdx);
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return Ci.nsIContentProcessProvider.NEW_PROCESS;
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},
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};
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// Fills up aProcesses until max and then selects one from the available
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// ones that host the least number of tabs.
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function MinTabSelector() {
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}
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MinTabSelector.prototype = {
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classID: Components.ID("{2dc08eaf-6eef-4394-b1df-a3a927c1290b}"),
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QueryInterface: XPCOMUtils.generateQI([Ci.nsIContentProcessProvider]),
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provideProcess(aType, aOpener, aProcesses, aCount) {
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let maxContentParents = getMaxContentParents(aType);
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if (aCount < maxContentParents) {
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return Ci.nsIContentProcessProvider.NEW_PROCESS;
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}
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let min = Number.MAX_VALUE;
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let candidate = Ci.nsIContentProcessProvider.NEW_PROCESS;
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for (let i = 0; i < maxContentParents; i++) {
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let process = aProcesses[i];
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let tabCount = process.tabCount;
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if (process.opener === aOpener && tabCount < min) {
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min = tabCount;
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candidate = i;
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}
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}
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return candidate;
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},
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};
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var components = [RandomSelector, MinTabSelector];
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this.NSGetFactory = XPCOMUtils.generateNSGetFactory(components);
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