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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";
const ResourceCommand = require("resource://devtools/shared/commands/resource/resource-command.js");
module.exports = async function ({ targetFront, onAvailable, onDestroyed }) {
// XXX: When watching root node for a non top-level target, this will also
// ensure the inspector & walker fronts for the target are initialized.
// This also implies that we call reparentRemoteFrame on the new walker, which
// will create the link between the parent frame NodeFront and the inner
// document NodeFront.
//
// This is not something that will work when the resource is moved to the
// server. When it becomes a server side resource, a RootNode would be emitted
// directly by the target actor.
//
// This probably means that the root node resource cannot remain a NodeFront.
// It should not be a front and the client should be responsible for
// retrieving the corresponding NodeFront.
//
// The other thing that we are missing with this patch is that we should only
// create inspector & walker fronts (and call reparentRemoteFrame) when we get
// a RootNode which is directly under an iframe node which is currently
// visible and tracked in the markup view.
//
// For instance, with the following markup:
// html
// body
// div
// iframe
// remote doc
//
// If the markup view only sees nodes down to `div`, then the client is not
// currently tracking the nodeFront for the `iframe`, and getting a new root
// node for the remote document should NOT force the iframe to be tracked on
// on the client.
//
// When we get a RootNode resource, we will need a way to check this before
// initializing & reparenting the walker.
//
if (!targetFront.getTrait("isBrowsingContext")) {
// The root-node resource is only available on browsing-context targets.
return;
}
const inspectorFront = await targetFront.getFront("inspector");
inspectorFront.walker.on("root-available", node => {
node.resourceType = ResourceCommand.TYPES.ROOT_NODE;
return onAvailable([node]);
});
inspectorFront.walker.on("root-destroyed", node => {
node.resourceType = ResourceCommand.TYPES.ROOT_NODE;
return onDestroyed([node]);
});
await inspectorFront.walker.watchRootNode();
};
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