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@ -1,7 +1,7 @@
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/*******************************************************************************
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µBlock - a browser extension to block requests.
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Copyright (C) 2014 The µBlock authors
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uMatrix - a browser extension to block requests.
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Copyright (C) 2014-2016 The uMatrix/uBlock Origin authors
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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@ -769,11 +769,15 @@ vAPI.tabs.get = function(tabId, callback) {
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var win = getOwnerWindow(browser);
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var tabBrowser = getTabBrowser(win);
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// https://github.com/gorhill/uMatrix/issues/540
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// The `index` property is nowhere used by uMatrix at this point, so we
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// will refrain from returning this information for the time being.
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callback({
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id: tabId,
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index: tabWatcher.indexFromTarget(browser),
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index: undefined,
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windowId: winWatcher.idFromWindow(win),
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active: browser === tabBrowser.selectedBrowser,
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active: tabBrowser !== null && browser === tabBrowser.selectedBrowser,
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url: browser.currentURI.asciiSpec,
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title: browser.contentTitle
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});
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@ -1012,11 +1016,17 @@ vAPI.tabs.injectScript = function(tabId, details, callback) {
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var tabWatcher = (function() {
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// TODO: find out whether we need a janitor to take care of stale entries.
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var browserToTabIdMap = new Map();
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// https://github.com/gorhill/uMatrix/issues/540
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// Use only weak references to hold onto browser references.
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var browserToTabIdMap = new WeakMap();
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var tabIdToBrowserMap = new Map();
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var tabIdGenerator = 1;
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var indexFromBrowser = function(browser) {
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if ( !browser ) {
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return -1;
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}
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var win = getOwnerWindow(browser);
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if ( !win ) {
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return -1;
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@ -1079,22 +1089,15 @@ var tabWatcher = (function() {
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if ( tabId === undefined ) {
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tabId = '' + tabIdGenerator++;
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browserToTabIdMap.set(browser, tabId);
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tabIdToBrowserMap.set(tabId, browser);
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tabIdToBrowserMap.set(tabId, Cu.getWeakReference(browser));
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}
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return tabId;
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};
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var browserFromTabId = function(tabId) {
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var browser = tabIdToBrowserMap.get(tabId);
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if ( browser === undefined ) {
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return null;
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}
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// Verify that the browser is still live
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if ( indexFromBrowser(browser) !== -1 ) {
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return browser;
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}
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removeBrowserEntry(tabId, browser);
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return null;
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var weakref = tabIdToBrowserMap.get(tabId);
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var browser = weakref && weakref.get();
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return browser || null;
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};
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var currentBrowser = function() {
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@ -1123,6 +1126,19 @@ var tabWatcher = (function() {
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onClose({ target: target });
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};
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var getAllBrowsers = function() {
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var browsers = [], browser;
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for ( var [tabId, weakref] of tabIdToBrowserMap ) {
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browser = weakref.get();
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// TODO:
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// Maybe call removeBrowserEntry() if the browser no longer exists?
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if ( browser ) {
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browsers.push(browser);
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}
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}
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return browsers;
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};
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// https://developer.mozilla.org/en-US/docs/Web/Events/TabOpen
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//var onOpen = function({target}) {
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// var tabId = tabIdFromTarget(target);
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@ -1368,14 +1384,14 @@ var tabWatcher = (function() {
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onWindowUnload(win);
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}
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browserToTabIdMap.clear();
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browserToTabIdMap = new WeakMap();
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tabIdToBrowserMap.clear();
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};
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cleanupTasks.push(stop);
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return {
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browsers: function() { return browserToTabIdMap.keys(); },
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browsers: getAllBrowsers,
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browserFromTabId: browserFromTabId,
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browserFromTarget: browserFromTarget,
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currentBrowser: currentBrowser,
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