uBlock/js/tab.js
2014-07-14 11:24:59 -04:00

155 lines
5.1 KiB
JavaScript

/*******************************************************************************
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(){
// When the DOM content of root frame is loaded, this means the tab
// content has changed.
function onDOMContentLoaded(details) {
if ( details.frameId !== 0 ) {
return;
}
µBlock.updateBadgeAsync(details.tabId);
}
chrome.webNavigation.onDOMContentLoaded.addListener(onDOMContentLoaded);
// 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.
function onTabUpdated(tabId, changeInfo, tab) {
if ( !tab.url || tab.url === '' ) {
return;
}
var µb = µBlock;
if ( !changeInfo.url || !µb.pageStores[tabId] ) {
return;
}
// If URL is unsupported scheme, unbind tab
if ( changeInfo.url && changeInfo.url.slice(0, 4) !== 'http' ) {
µb.unbindTabFromPageStats(tabId);
}
µb.updateBadgeAsync(tabId);
}
chrome.tabs.onUpdated.addListener(onTabUpdated);
function onTabRemoved(tabId) {
if ( tabId < 0 ) {
return;
}
µBlock.unbindTabFromPageStats(tabId);
}
chrome.tabs.onRemoved.addListener(onTabRemoved);
// Initialize internal state with maybe already existing tabs
chrome.tabs.query({ url: '<all_urls>' }, function(tabs) {
var i = tabs.length;
while ( i-- ) {
µBlock.bindTabToPageStats(tabs[i].id, tabs[i].url);
}
});
})();
/******************************************************************************/
/******************************************************************************/
// 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 '';
};
/******************************************************************************/
// Create an entry for the tab if it doesn't exist.
µBlock.bindTabToPageStats = function(tabId, pageURL) {
this.updateBadgeAsync(tabId);
// https://github.com/gorhill/httpswitchboard/issues/303
// Normalize page URL
pageURL = this.normalizePageURL(pageURL);
// Do not create a page store for URLs which are of no interests
if ( pageURL === '' ) {
this.unbindTabFromPageStats(tabId);
return null;
}
// Reuse page store if one exists: this allows to guess if a tab is
// a popup.
var pageStore = this.pageStores[tabId];
if ( pageStore ) {
pageStore.reuse(pageURL);
} else {
pageStore = this.PageStore.factory(tabId, pageURL);
}
//console.log('µBlock> bindTabToPageStats(%d, "%s")', tabId, pageURL);
this.pageStores[tabId] = pageStore;
return pageStore;
};
µBlock.unbindTabFromPageStats = function(tabId) {
delete this.pageStores[tabId];
};
/******************************************************************************/
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 });
}
};