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Better way to add custom event listener.

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This commit is contained in:
Brendan Dahl 2012-02-06 16:06:18 -08:00
parent b6f05fb8c6
commit 7a17676b06
1 changed files with 35 additions and 13 deletions
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48
extensions/firefox/components/PdfStreamConverter.js
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@ -19,6 +19,18 @@ function log(aMsg) {
Services.console.logStringMessage(msg);
dump(msg + '\n');
}
function getWindow(top, id) top.QueryInterface(Ci.nsIInterfaceRequestor)
.getInterface(Ci.nsIDOMWindowUtils)
.getOuterWindowWithId(id);
function windowID(win) win.QueryInterface(Ci.nsIInterfaceRequestor)
.getInterface(Ci.nsIDOMWindowUtils)
.outerWindowID;
function topWindow(win) win.QueryInterface(Ci.nsIInterfaceRequestor)
.getInterface(Ci.nsIWebNavigation)
.QueryInterface(Ci.nsIDocShellTreeItem)
.rootTreeItem
.QueryInterface(Ci.nsIInterfaceRequestor)
.getInterface(Ci.nsIDOMWindow);
let application = Cc['@mozilla.org/fuel/application;1']
.getService(Ci.fuelIApplication);
let privateBrowsing = Cc['@mozilla.org/privatebrowsing;1']
@ -131,20 +143,30 @@ PdfStreamConverter.prototype = {
// that its the one we want by its URL. When the correct DOM is found create
// an event listener on that window for the pdf.js events that require
// chrome priviledges.
var url = aRequest.URI.spec;
var gb = Services.wm.getMostRecentWindow('navigator:browser');
var domListener = function domListener(event) {
var doc = event.originalTarget;
var win = doc.defaultView;
if (doc.location.href === url) {
gb.removeEventListener('DOMContentLoaded', domListener);
var requestListener = new RequestListener(new ChromeActions());
win.addEventListener(PDFJS_EVENT_ID, function(event) {
requestListener.receive(event);
}, false, true);
let window = aRequest.loadGroup.groupObserver
.QueryInterface(Ci.nsIWebProgress)
.DOMWindow;
let top = topWindow(window);
let id = windowID(window);
window = null;
top.addEventListener('DOMWindowCreated', function onDOMWinCreated(event) {
let doc = event.originalTarget;
let win = doc.defaultView;
if (id == windowID(win)) {
top.removeEventListener('DOMWindowCreated', onDOMWinCreated, true);
if (!doc.documentURIObject.equals(aRequest.URI))
return;
let requestListener = new RequestListener(new ChromeActions);
win.addEventListener(PDFJS_EVENT_ID, function(event) {
requestListener.receive(event);
}, false, true);
} else if (!getWindow(top, id)) {
top.removeEventListener('DOMWindowCreated', onDOMWinCreated, true);
}
};
gb.addEventListener('DOMContentLoaded', domListener, false);
}, true);
},
// nsIRequestObserver::onStopRequest