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Use a different way to add the event listener.

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This commit is contained in:
Brendan Dahl 2012-03-23 14:28:09 -07:00
parent 25c0bfaa79
commit 22c858c2ec
1 changed files with 30 additions and 45 deletions
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75
extensions/firefox/components/PdfStreamConverter.js
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@ -30,23 +30,11 @@ function log(aMsg) {
Services.console.logStringMessage(msg); Services.console.logStringMessage(msg);
dump(msg + '\n'); dump(msg + '\n');
} }
function getWindow(top, id) {
return top.QueryInterface(Ci.nsIInterfaceRequestor) function getDOMWindow(aChannel) {
.getInterface(Ci.nsIDOMWindowUtils) var requestor = aChannel.notificationCallbacks;
.getOuterWindowWithId(id); var win = requestor.getInterface(Components.interfaces.nsIDOMWindow);
} return win;
function windowID(win) {
return win.QueryInterface(Ci.nsIInterfaceRequestor)
.getInterface(Ci.nsIDOMWindowUtils)
.outerWindowID;
}
function topWindow(win) {
return win.QueryInterface(Ci.nsIInterfaceRequestor)
.getInterface(Ci.nsIWebNavigation)
.QueryInterface(Ci.nsIDocShellTreeItem)
.rootTreeItem
.QueryInterface(Ci.nsIInterfaceRequestor)
.getInterface(Ci.nsIDOMWindow);
} }
// All the priviledged actions. // All the priviledged actions.
@ -75,6 +63,12 @@ ChromeActions.prototype = {
} }
}; };
function getDOMWindow(aChannel) {
var requestor = aChannel.notificationCallbacks;
var win = requestor.getInterface(Components.interfaces.nsIDOMWindow);
return win;
}
// Event listener to trigger chrome privedged code. // Event listener to trigger chrome privedged code.
function RequestListener(actions) { function RequestListener(actions) {
this.actions = actions; this.actions = actions;
@ -163,38 +157,29 @@ PdfStreamConverter.prototype = {
var channel = ioService.newChannel( var channel = ioService.newChannel(
'resource://pdf.js/web/viewer.html', null, null); 'resource://pdf.js/web/viewer.html', null, null);
// Keep the URL the same so the browser sees it as the same. var listener = this.listener;
channel.originalURI = aRequest.URI; // Proxy all the requst observer calls, when it gets to onStopRequst
channel.asyncOpen(this.listener, aContext); // we can get the dom window.
var proxy = {
// Setup a global listener waiting for the next DOM to be created and verfiy onStartRequest: function() {
// that its the one we want by its URL. When the correct DOM is found create listener.onStartRequest.apply(listener, arguments);
// an event listener on that window for the pdf.js events that require },
// chrome priviledges. Code snippet from John Galt. onDataAvailable: function() {
let window = aRequest.loadGroup.groupObserver listener.onDataAvailable.apply(listener, arguments);
.QueryInterface(Ci.nsIWebProgress) },
.DOMWindow; onStopRequest: function() {
let top = topWindow(window); var domWindow = getDOMWindow(channel);
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); let requestListener = new RequestListener(new ChromeActions);
win.addEventListener(PDFJS_EVENT_ID, function(event) { domWindow.addEventListener(PDFJS_EVENT_ID, function(event) {
requestListener.receive(event); requestListener.receive(event);
}, false, true); }, false, true);
} else if (!getWindow(top, id)) { listener.onStopRequest.apply(listener, arguments);
top.removeEventListener('DOMWindowCreated', onDOMWinCreated, true);
} }
}, true); };
// Keep the URL the same so the browser sees it as the same.
channel.originalURI = aRequest.URI;
channel.asyncOpen(proxy, aContext);
}, },
// nsIRequestObserver::onStopRequest // nsIRequestObserver::onStopRequest