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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
/*
* Target actor for the entire parent process.
*
* This actor extends WindowGlobalTargetActor.
* This actor is extended by WebExtensionTargetActor.
*
* See devtools/docs/backend/actor-hierarchy.md for more details.
*/
const {
DevToolsServer,
} = require("resource://devtools/server/devtools-server.js");
const {
getChildDocShells,
WindowGlobalTargetActor,
} = require("resource://devtools/server/actors/targets/window-global.js");
const makeDebugger = require("resource://devtools/server/actors/utils/make-debugger.js");
const {
parentProcessTargetSpec,
} = require("resource://devtools/shared/specs/targets/parent-process.js");
class ParentProcessTargetActor extends WindowGlobalTargetActor {
/**
* Creates a target actor for debugging all the chrome content in the parent process.
* Most of the implementation is inherited from WindowGlobalTargetActor.
* ParentProcessTargetActor is a child of RootActor, it can be instantiated via
* RootActor.getProcess request. ParentProcessTargetActor exposes all target-scoped actors
* via its form() request, like WindowGlobalTargetActor.
*
* @param conn DevToolsServerConnection
* The connection to the client.
* @param {Object} options
* - isTopLevelTarget: {Boolean} flag to indicate if this is the top
* level target of the DevTools session
* - sessionContext Object
* The Session Context to help know what is debugged.
* See devtools/server/actors/watcher/session-context.js
* - customSpec Object
* WebExtensionTargetActor inherits from ParentProcessTargetActor
* and has to use its own protocol.js specification object.
*/
constructor(
conn,
{ isTopLevelTarget, sessionContext, customSpec = parentProcessTargetSpec }
) {
super(conn, {
isTopLevelTarget,
sessionContext,
customSpec,
});
// This creates a Debugger instance for chrome debugging all globals.
this.makeDebugger = makeDebugger.bind(null, {
findDebuggees: dbg => dbg.findAllGlobals(),
shouldAddNewGlobalAsDebuggee: () => true,
});
// Ensure catching the creation of any new content docshell
this.watchNewDocShells = true;
this.isRootActor = true;
// Listen for any new/destroyed chrome docshell
Services.obs.addObserver(this, "chrome-webnavigation-create");
Services.obs.addObserver(this, "chrome-webnavigation-destroy");
// If we are the parent process target actor and not a subclass
// (i.e. if we aren't the webext target actor)
// set the parent process docshell:
if (customSpec == parentProcessTargetSpec) {
this.setDocShell(this._getInitialDocShell());
}
}
// Overload setDocShell in order to observe all the docshells.
// WindowGlobalTargetActor only observes the top level one,
// but we also need to observe all of them for WebExtensionTargetActor subclass.
setDocShell(initialDocShell) {
super.setDocShell(initialDocShell);
// Iterate over all top-level windows.
for (const { docShell } of Services.ww.getWindowEnumerator()) {
if (docShell == this.docShell) {
continue;
}
this._progressListener.watch(docShell);
}
}
_getInitialDocShell() {
// Defines the default docshell selected for the target actor
let window = Services.wm.getMostRecentWindow(
DevToolsServer.chromeWindowType
);
// Default to any available top level window if there is no expected window
// eg when running ./mach run --chrome chrome://browser/content/aboutTabCrashed.xhtml --jsdebugger
if (!window) {
window = Services.wm.getMostRecentWindow(null);
}
// We really want _some_ window at least, so fallback to the hidden window if
// there's nothing else (such as during early startup).
if (!window) {
window = Services.appShell.hiddenDOMWindow;
}
return window.docShell;
}
/**
* Getter for the list of all docshells in this targetActor
* @return {Array}
*/
get docShells() {
// Iterate over all top-level windows and all their docshells.
let docShells = [];
for (const { docShell } of Services.ww.getWindowEnumerator()) {
docShells = docShells.concat(getChildDocShells(docShell));
}
return docShells;
}
observe(subject, topic, data) {
super.observe(subject, topic, data);
if (this.isDestroyed()) {
return;
}
subject.QueryInterface(Ci.nsIDocShell);
if (topic == "chrome-webnavigation-create") {
this._onDocShellCreated(subject);
} else if (topic == "chrome-webnavigation-destroy") {
this._onDocShellDestroy(subject);
}
}
_detach() {
if (this.isDestroyed()) {
return false;
}
Services.obs.removeObserver(this, "chrome-webnavigation-create");
Services.obs.removeObserver(this, "chrome-webnavigation-destroy");
// Iterate over all top-level windows.
for (const { docShell } of Services.ww.getWindowEnumerator()) {
if (docShell == this.docShell) {
continue;
}
this._progressListener.unwatch(docShell);
}
return super._detach();
}
}
exports.ParentProcessTargetActor = ParentProcessTargetActor;
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