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Bug 1031609 - Docshell rootTreeItem shim (r=mconley)

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This commit is contained in:
Bill McCloskey 2014-07-14 22:10:06 -07:00
parent a5106efb20
commit 115e2ded44
2 changed files with 47 additions and 0 deletions
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2
toolkit/components/addoncompat/RemoteAddonsChild.jsm
View File

@ -207,6 +207,8 @@ EventTargetChild.prototype = {
let RemoteAddonsChild = {
init: function(global) {
global.sendAsyncMessage("Addons:RegisterGlobal", {}, {global: global});
// Return this so it gets rooted in the content script.
return [new EventTargetChild(global)];
},

45
toolkit/components/addoncompat/RemoteAddonsParent.jsm
View File

@ -404,8 +404,43 @@ EventTargetInterposition.methods.removeEventListener =
target.removeEventListener(type, listener, useCapture);
};
// This interposition intercepts accesses to |rootTreeItem| on a child
// process docshell. In the child, each docshell is its own
// root. However, add-ons expect the root to be the chrome docshell,
// so we make that happen here.
let ContentDocShellTreeItemInterposition = new Interposition();
ContentDocShellTreeItemInterposition.getters.rootTreeItem =
function(addon, target) {
// The chrome global in the child.
let chromeGlobal = target.rootTreeItem
.QueryInterface(Ci.nsIInterfaceRequestor)
.getInterface(Ci.nsIContentFrameMessageManager);
// Map it to a <browser> element and window.
let browser = RemoteAddonsParent.globalToBrowser.get(chromeGlobal);
if (!browser) {
// Somehow we have a CPOW from the child, but it hasn't sent us
// its global yet. That shouldn't happen, but return null just
// in case.
return null;
}
let chromeWin = browser.ownerDocument.defaultView;
// Return that window's docshell.
return chromeWin.QueryInterface(Ci.nsIInterfaceRequestor)
.getInterface(Ci.nsIWebNavigation)
.QueryInterface(Ci.nsIDocShellTreeItem);
};
let RemoteAddonsParent = {
init: function() {
let mm = Cc["@mozilla.org/globalmessagemanager;1"].getService(Ci.nsIMessageListenerManager);
mm.addMessageListener("Addons:RegisterGlobal", this);
this.globalToBrowser = new WeakMap();
this.browserToGlobal = new WeakMap();
},
getInterfaceInterpositions: function() {
@ -429,7 +464,17 @@ let RemoteAddonsParent = {
}
register("EventTarget", EventTargetInterposition);
register("ContentDocShellTreeItem", ContentDocShellTreeItemInterposition);
return result;
},
receiveMessage: function(msg) {
switch (msg.name) {
case "Addons:RegisterGlobal":
this.browserToGlobal.set(msg.target, msg.objects.global);
this.globalToBrowser.set(msg.objects.global, msg.target);
break;
}
}
};