1 // Copyright 2013 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "content/browser/frame_host/frame_tree_node.h"
6
7 #include <queue>
8
9 #include "base/stl_util.h"
10 #include "content/browser/frame_host/frame_tree.h"
11 #include "content/browser/frame_host/navigator.h"
12 #include "content/browser/frame_host/render_frame_host_impl.h"
13 #include "content/browser/renderer_host/render_view_host_impl.h"
14
15 namespace content {
16
17 int64 FrameTreeNode::next_frame_tree_node_id_ = 1;
18
FrameTreeNode(FrameTree * frame_tree,Navigator * navigator,RenderFrameHostDelegate * render_frame_delegate,RenderViewHostDelegate * render_view_delegate,RenderWidgetHostDelegate * render_widget_delegate,RenderFrameHostManager::Delegate * manager_delegate,const std::string & name)19 FrameTreeNode::FrameTreeNode(FrameTree* frame_tree,
20 Navigator* navigator,
21 RenderFrameHostDelegate* render_frame_delegate,
22 RenderViewHostDelegate* render_view_delegate,
23 RenderWidgetHostDelegate* render_widget_delegate,
24 RenderFrameHostManager::Delegate* manager_delegate,
25 const std::string& name)
26 : frame_tree_(frame_tree),
27 navigator_(navigator),
28 render_manager_(this,
29 render_frame_delegate,
30 render_view_delegate,
31 render_widget_delegate,
32 manager_delegate),
33 frame_tree_node_id_(next_frame_tree_node_id_++),
34 frame_name_(name),
35 parent_(NULL) {}
36
~FrameTreeNode()37 FrameTreeNode::~FrameTreeNode() {
38 }
39
IsMainFrame() const40 bool FrameTreeNode::IsMainFrame() const {
41 return frame_tree_->root() == this;
42 }
43
AddChild(scoped_ptr<FrameTreeNode> child,int process_id,int frame_routing_id)44 void FrameTreeNode::AddChild(scoped_ptr<FrameTreeNode> child,
45 int process_id,
46 int frame_routing_id) {
47 // Child frame must always be created in the same process as the parent.
48 CHECK_EQ(process_id, render_manager_.current_host()->GetProcess()->GetID());
49
50 // Initialize the RenderFrameHost for the new node. We always create child
51 // frames in the same SiteInstance as the current frame, and they can swap to
52 // a different one if they navigate away.
53 child->render_manager()->Init(
54 render_manager_.current_host()->GetSiteInstance()->GetBrowserContext(),
55 render_manager_.current_host()->GetSiteInstance(),
56 render_manager_.current_host()->GetRoutingID(),
57 frame_routing_id);
58 child->set_parent(this);
59 children_.push_back(child.release());
60 }
61
RemoveChild(FrameTreeNode * child)62 void FrameTreeNode::RemoveChild(FrameTreeNode* child) {
63 std::vector<FrameTreeNode*>::iterator iter;
64
65 for (iter = children_.begin(); iter != children_.end(); ++iter) {
66 if ((*iter) == child)
67 break;
68 }
69
70 if (iter != children_.end()) {
71 // Subtle: we need to make sure the node is gone from the tree before
72 // observers are notified of its deletion.
73 scoped_ptr<FrameTreeNode> node_to_delete(*iter);
74 children_.weak_erase(iter);
75 node_to_delete->set_parent(NULL);
76 node_to_delete.reset();
77 }
78 }
79
ResetForNewProcess()80 void FrameTreeNode::ResetForNewProcess() {
81 current_url_ = GURL();
82
83 // The RenderFrame no longer exists and will need to be created again.
84 current_frame_host()->set_render_frame_created(false);
85
86 // The children may not have been cleared if a cross-process navigation
87 // commits before the old process cleans everything up. Make sure the child
88 // nodes get deleted before swapping to a new process.
89 ScopedVector<FrameTreeNode> old_children = children_.Pass();
90 old_children.clear(); // May notify observers.
91 }
92
93 } // namespace content
94