uBlock/js/tab.js

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/*******************************************************************************
µBlock - a Chromium browser extension to block requests.
Copyright (C) 2014 Raymond Hill
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see {http://www.gnu.org/licenses/}.
Home: https://github.com/gorhill/uBlock
*/
/* global chrome, µBlock */
/******************************************************************************/
(function(){
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var µb = µBlock;
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// When the DOM content of root frame is loaded, this means the tab
// content has changed.
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function onNavigationCommitted(details) {
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if ( details.frameId !== 0 ) {
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return;
}
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µb.bindTabToPageStats(details.tabId, details.url);
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}
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chrome.webNavigation.onCommitted.addListener(onNavigationCommitted);
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// It may happen the URL in the tab changes, while the page's document
// stays the same (for instance, Google Maps). Without this listener,
// the extension icon won't be properly refreshed.
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function onTabUpdated(tabId, changeInfo, tab) {
if ( !tab.url || tab.url === '' ) {
return;
}
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if ( !changeInfo.url ) {
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return;
}
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µb.bindTabToPageStats(tabId, changeInfo.url);
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}
chrome.tabs.onUpdated.addListener(onTabUpdated);
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function onTabRemoved(tabId) {
if ( tabId < 0 ) {
return;
}
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µb.unbindTabFromPageStats(tabId);
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}
chrome.tabs.onRemoved.addListener(onTabRemoved);
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})();
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/******************************************************************************/
/******************************************************************************/
// https://github.com/gorhill/httpswitchboard/issues/303
// Some kind of trick going on here:
// Any scheme other than 'http' and 'https' is remapped into a fake
// URL which trick the rest of µBlock into being able to process an
// otherwise unmanageable scheme. µBlock needs web page to have a proper
// hostname to work properly, so just like the 'chromium-behind-the-scene'
// fake domain name, we map unknown schemes into a fake '{scheme}-scheme'
// hostname. This way, for a specific scheme you can create scope with
// rules which will apply only to that scheme.
µBlock.normalizePageURL = function(pageURL) {
var uri = this.URI.set(pageURL);
if ( uri.scheme === 'https' || uri.scheme === 'http' ) {
return uri.normalizedURI();
}
return '';
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};
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/******************************************************************************/
// Create an entry for the tab if it doesn't exist.
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µBlock.bindTabToPageStats = function(tabId, pageURL, context) {
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this.updateBadgeAsync(tabId);
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// https://github.com/gorhill/httpswitchboard/issues/303
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// Normalize page URL
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pageURL = this.normalizePageURL(pageURL);
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// Do not create a page store for URLs which are of no interests
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if ( pageURL === '' ) {
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this.unbindTabFromPageStats(tabId);
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return null;
}
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// Reuse page store if one exists: this allows to guess if a tab is
// a popup.
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var pageStore = this.pageStores[tabId];
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if ( pageStore ) {
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if ( pageURL !== pageStore.pageURL || context === 'beforeRequest' ) {
pageStore.reuse(pageURL);
}
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} else {
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pageStore = this.pageStores[tabId] = this.PageStore.factory(tabId, pageURL);
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}
return pageStore;
};
µBlock.unbindTabFromPageStats = function(tabId) {
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//console.debug('µBlock> unbindTabFromPageStats(%d)', tabId);
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var pageStore = this.pageStores[tabId];
if ( pageStore !== undefined ) {
pageStore.dispose();
delete this.pageStores[tabId];
}
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};
/******************************************************************************/
µBlock.pageUrlFromTabId = function(tabId) {
var pageStore = this.pageStores[tabId];
return pageStore ? pageStore.pageURL : '';
};
µBlock.pageUrlFromPageStats = function(pageStats) {
if ( pageStats ) {
return pageStats.pageURL;
}
return '';
};
µBlock.pageStoreFromTabId = function(tabId) {
return this.pageStores[tabId];
};
/******************************************************************************/
µBlock.forceReload = function(pageURL) {
var tabId = this.tabIdFromPageUrl(pageURL);
if ( tabId ) {
chrome.tabs.reload(tabId, { bypassCache: true });
}
};