michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: const tabs = require('sdk/tabs');
michael@0: const widgets = require('sdk/widget');
michael@0: const data = require('sdk/self').data;
michael@0: const pageMod = require('sdk/page-mod');
michael@0: const panel = require('sdk/panel');
michael@0: 
michael@0: const ICON_WIDTH = 16;
michael@0: 
michael@0: function updateWidgetView(tab) {
michael@0:   let widgetView = widget.getView(tab.window);
michael@0:   if (!tab.libraries) {
michael@0:     tab.libraries = [];
michael@0:   }
michael@0:   widgetView.port.emit("update", tab.libraries);
michael@0:   widgetView.width = tab.libraries.length * ICON_WIDTH;
michael@0: }
michael@0: 
michael@0: var widget = widgets.Widget({
michael@0:   id: "library-detector",
michael@0:   label: "Library Detector",
michael@0:   contentURL: data.url("widget.html"),
michael@0:   panel: panel.Panel({
michael@0:     width: 240,
michael@0:     height: 60,
michael@0:     contentURL: data.url("panel.html")
michael@0:   })
michael@0: });
michael@0: 
michael@0: widget.port.on('setLibraryInfo', function(libraryInfo) {
michael@0:   widget.panel.postMessage(libraryInfo);
michael@0: });
michael@0: 
michael@0: pageMod.PageMod({
michael@0:   include: "*",
michael@0:   contentScriptWhen: 'end',
michael@0:   contentScriptFile: (data.url('library-detector.js')),
michael@0:   onAttach: function(worker) {
michael@0:     worker.on('message', function(libraryList) {
michael@0:       if (!worker.tab.libraries) {
michael@0:         worker.tab.libraries = [];
michael@0:       }
michael@0:       libraryList.forEach(function(library) {
michael@0:         if (worker.tab.libraries.indexOf(library) == -1) {
michael@0:           worker.tab.libraries.push(library);
michael@0:         }
michael@0:       });
michael@0:       if (worker.tab == tabs.activeTab) {
michael@0:         updateWidgetView(worker.tab);
michael@0:       }
michael@0:     });
michael@0:   }
michael@0: });
michael@0: 
michael@0: tabs.on('activate', function(tab) {
michael@0:   updateWidgetView(tab);
michael@0: });
michael@0: 
michael@0: /*
michael@0: For change of location
michael@0: */
michael@0: tabs.on('ready', function(tab) {
michael@0:   tab.libraries = [];
michael@0: });