bootstrap.js

// Opera.Wang+expressionsearch@gmail.com GPL/MPL
"use strict";

Cu.import("resource://gre/modules/Services.jsm");
// if use custom resouce, refer here
// http://mdn.beonex.com/en/JavaScript_code_modules/Using.html

const sss = Cc["@mozilla.org/content/style-sheet-service;1"].getService(Ci.nsIStyleSheetService);
const userCSS = Services.io.newURI("chrome://expressionsearch/skin/overlay.css", null, null);
const targetWindows = [ "mail:3pane", "mailnews:virtualFolderList" ];
const observeEvent = "xul-window-registered";

function loadIntoWindow(window) {
  if ( !window ) return; // windows is the global host context
  let document = window.document; // XULDocument
  let type = document.documentElement.getAttribute('windowtype'); // documentElement maybe 'messengerWindow' / 'addressbookWindow'
  if ( targetWindows.indexOf(type) < 0 ) return;
  ExpressionSearchChrome.init(); // will and add my filter, and TB want the domID exists when filter registered, so only called when have window ready
  ExpressionSearchChrome.Load(window);
}
 
var windowListener = {
  onOpenWindow: function(aWindow) {
    let onLoadWindow = function() {
      aWindow.removeEventListener("DOMContentLoaded", onLoadWindow, false);
      loadIntoWindow(aWindow);
    };
    aWindow.addEventListener("DOMContentLoaded", onLoadWindow, false);
  },
  observe: function(subject, topic, data) {
    if ( topic == observeEvent) {
      windowListener.onOpenWindow( subject.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIDOMWindow) );
    }
  },
};

// A toplevel window in a XUL app is an nsXULWindow.  Inside that there is an nsGlobalWindow (aka nsIDOMWindow).
function startup(aData, aReason) {
  Services.console.logStringMessage("Expression Search / Google Mail UI startup...");
  Cu.import("chrome://expressionsearch/content/es.js");
  let windows = Services.wm.getEnumerator(null);
  while (windows.hasMoreElements()) {
    let domWindow = windows.getNext().QueryInterface(Ci.nsIDOMWindow);
    if ( domWindow.document.readyState == "complete" && targetWindows.indexOf(domWindow.document.documentElement.getAttribute('windowtype')) >= 0 ) {
      loadIntoWindow(domWindow);
    } else {
      windowListener.onOpenWindow(domWindow);
    }
  }
  // Wait for new windows
  Services.obs.addObserver(windowListener, observeEvent, false);
  // install userCSS, works for all document like userChrome.css, see https://developer.mozilla.org/en/docs/Using_the_Stylesheet_Service
  // validator warnings on the below line, ignore it
  if ( !sss.sheetRegistered(userCSS, sss.USER_SHEET) ) sss.loadAndRegisterSheet(userCSS, sss.USER_SHEET); // will be unregister when shutdown
}
 
function shutdown(aData, aReason) {
  // When the application is shutting down we normally don't have to clean up any UI changes made
  if (aReason == APP_SHUTDOWN) return;

  try {
    if ( sss.sheetRegistered(userCSS, sss.USER_SHEET) ) sss.unregisterSheet(userCSS, sss.USER_SHEET);
  } catch (err) {Cu.reportError(err);}
  
  try {
    Services.obs.removeObserver(windowListener, observeEvent);
    // Unload from any existing windows
    let windows = Services.wm.getEnumerator(null);
    while (windows.hasMoreElements()) {
      let winInterface = windows.getNext().QueryInterface(Ci.nsIInterfaceRequestor);
      let domWindow = winInterface.getInterface(Ci.nsIDOMWindow);
      let windowUtils = domWindow.windowUtils || winInterface.getInterface(Ci.nsIDOMWindowUtils);
      ExpressionSearchChrome.unLoad(domWindow); // won't check windowtype as unload will check
      // Do CC & GC, comment out allTraces when release
      windowUtils.garbageCollect(
        // Cc["@mozilla.org/cycle-collector-logger;1"].createInstance(Ci.nsICycleCollectorListener).allTraces()
      );
    }
    ExpressionSearchChrome.cleanup();
  } catch (err) {Cu.reportError(err);}
  Services.strings.flushBundles(); // clear string bundles
  ["aop", "log"].forEach( function(file) {
    Cu.unload("chrome://expressionsearch/content/" + file + ".js");
  } );
  try {
    ExpressionSearchChrome = null;
  } catch (err) {Cu.reportError(err);}
  Services.obs.notifyObservers(null, "startupcache-invalidate", null); //ADDON_DISABLE ADDON_UNINSTALL ADDON_UPGRADE ADDON_DOWNGRADE
  Services.obs.notifyObservers(null, "chrome-flush-caches", null);
  Cu.schedulePreciseGC( Cu.forceGC );
  Services.console.logStringMessage("Expression Search / Google Mail UI shutdown");
}

function install(aData, aReason) {}
function uninstall(aData, aReason) {}