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authorMatt A. Tobin <email@mattatobin.com>2019-04-23 15:32:23 -0400
committerMatt A. Tobin <email@mattatobin.com>2019-04-23 15:32:23 -0400
commitabe80cc31d5a40ebed743085011fbcda0c1a9a10 (patch)
treefb3762f06b84745b182af281abb107b95a9fcf01 /mobile/android/chrome/content/MemoryObserver.js
parent63295d0087eb58a6eb34cad324c4c53d1b220491 (diff)
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Issue #1053 - Drop support Android and remove Fennec - Part 1a: Remove mobile/android
Diffstat (limited to 'mobile/android/chrome/content/MemoryObserver.js')
-rw-r--r--mobile/android/chrome/content/MemoryObserver.js88
1 files changed, 0 insertions, 88 deletions
diff --git a/mobile/android/chrome/content/MemoryObserver.js b/mobile/android/chrome/content/MemoryObserver.js
deleted file mode 100644
index 2bb3ae842..000000000
--- a/mobile/android/chrome/content/MemoryObserver.js
+++ /dev/null
@@ -1,88 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this file,
- * You can obtain one at http://mozilla.org/MPL/2.0/. */
-"use strict";
-
-var MemoryObserver = {
- observe: function mo_observe(aSubject, aTopic, aData) {
- if (aTopic == "memory-pressure") {
- if (aData != "heap-minimize") {
- this.handleLowMemory();
- }
- // The JS engine would normally GC on this notification, but since we
- // disabled that in favor of this method (bug 669346), we should gc here.
- // See bug 784040 for when this code was ported from XUL to native Fennec.
- this.gc();
- } else if (aTopic == "Memory:Dump") {
- this.dumpMemoryStats(aData);
- }
- },
-
- handleLowMemory: function() {
- // do things to reduce memory usage here
- if (!Services.prefs.getBoolPref("browser.tabs.disableBackgroundZombification")) {
- let tabs = BrowserApp.tabs;
- let selected = BrowserApp.selectedTab;
- for (let i = 0; i < tabs.length; i++) {
- if (tabs[i] != selected && !tabs[i].playingAudio) {
- this.zombify(tabs[i]);
- }
- }
- }
-
- // Change some preferences temporarily for only this session
- let defaults = Services.prefs.getDefaultBranch(null);
-
- // Reduce the amount of decoded image data we keep around
- defaults.setIntPref("image.mem.max_decoded_image_kb", 0);
-
- // Stop using the bfcache
- if (!Services.prefs.getBoolPref("browser.sessionhistory.bfcacheIgnoreMemoryPressure")) {
- defaults.setIntPref("browser.sessionhistory.max_total_viewers", 0);
- }
- },
-
- zombify: function(tab) {
- let browser = tab.browser;
- let data = browser.__SS_data;
- let extra = browser.__SS_extdata;
-
- // Notify any interested parties (e.g. the session store)
- // that the original tab object is going to be destroyed
- let evt = document.createEvent("UIEvents");
- evt.initUIEvent("TabPreZombify", true, false, window, null);
- browser.dispatchEvent(evt);
-
- // We need this data to correctly create and position the new browser
- // If this browser is already a zombie, fallback to the session data
- let currentURL = browser.__SS_restore ? data.entries[0].url : browser.currentURI.spec;
- let sibling = browser.nextSibling;
- let isPrivate = PrivateBrowsingUtils.isBrowserPrivate(browser);
-
- tab.destroy();
- tab.create(currentURL, { sibling: sibling, zombifying: true, delayLoad: true, isPrivate: isPrivate });
-
- // Reattach session store data and flag this browser so it is restored on select
- browser = tab.browser;
- browser.__SS_data = data;
- browser.__SS_extdata = extra;
- browser.__SS_restore = true;
- browser.setAttribute("pending", "true");
-
- // Notify the session store to reattach its listeners to the new tab object
- evt = document.createEvent("UIEvents");
- evt.initUIEvent("TabPostZombify", true, false, window, null);
- browser.dispatchEvent(evt);
- },
-
- gc: function() {
- window.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIDOMWindowUtils).garbageCollect();
- Cu.forceGC();
- },
-
- dumpMemoryStats: function(aLabel) {
- let memDumper = Cc["@mozilla.org/memory-info-dumper;1"].getService(Ci.nsIMemoryInfoDumper);
- memDumper.dumpMemoryInfoToTempDir(aLabel, /* anonymize = */ false,
- /* minimize = */ false);
- },
-};