66 lines
2.0 KiB
JavaScript
66 lines
2.0 KiB
JavaScript
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/*
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Backporting "visuallyselected" for Firefox 31-40
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See also:
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http://www.hackermusings.com/2015/06/electrolysis-a-tale-of-tab-switching-and-themes/
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Usage:
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Components.utils.import(".../path/to/visuallyselectedTabs.jsm");
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visuallyselectedTabs(gBrowser);
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license: The MIT License, Copyright (c) 2015 YUKI "Piro" Hiroshi
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original:
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http://github.com/piroor/fxaddonlib-visuallyselected-tabs
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*/
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var EXPORTED_SYMBOLS = ['visuallyselectedTabs'];
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Components.utils.import('resource://gre/modules/Services.jsm');
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function setVisuallySelected(aNode, aSelected) {
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if (!aNode || typeof aNode.setAttribute != 'function')
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return;
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if (aSelected)
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aNode.setAttribute('visuallyselected', true);
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else
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aNode.removeAttribute('visuallyselected');
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Array.forEach(aNode.childNodes, function(aChild) {
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setVisuallySelected(aChild, aSelected);
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});
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var anonymousChildren = aNode.ownerDocument.getAnonymousNodes(aNode);
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if (anonymousChildren && anonymousChildren.length > 0)
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Array.forEach(anonymousChildren, function(aAnonymousChild) {
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setVisuallySelected(aAnonymousChild, aSelected);
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});
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}
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function visuallyselectedTabs(aTabBrowser) {
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if (!aTabBrowser ||
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aTabBrowser.localName != 'tabbrowser' ||
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aTabBrowser.__visuallyselectedTabsInstalled ||
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Services.vc.compare(Services.appinfo.platformVersion, '41.0a1') >= 0)
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return;
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aTabBrowser.__visuallyselectedTabsInstalled = true;
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var document = aTabBrowser.ownerDocument;
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function onTabSelect(aEvent) {
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var prevTab = aEvent.detail && aEvent.detail.previousTab;
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if (prevTab)
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setVisuallySelected(prevTab, false);
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setVisuallySelected(aEvent.originalTarget, true);
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}
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var tabsContainer = aTabBrowser.tabContainer;
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tabsContainer.addEventListener('TabSelect', onTabSelect, false);
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document.addEventListener('unload', function onUnload(aEvent) {
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document.removeEventListener('unload', onUnload, false);
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tabsContainer.removeEventListener('TabSelect', onTabSelect, false);
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}, false);
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}
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