frame_tree_node.cc revision 5d1f7b1de12d16ceb2c938c56701a3e8bfa558f7 
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
15namespace content {
16
17const int64 FrameTreeNode::kInvalidFrameId = -1;
18int64 FrameTreeNode::next_frame_tree_node_id_ = 1;
19
20FrameTreeNode::FrameTreeNode(FrameTree* frame_tree,
21                             Navigator* navigator,
22                             RenderFrameHostDelegate* render_frame_delegate,
23                             RenderViewHostDelegate* render_view_delegate,
24                             RenderWidgetHostDelegate* render_widget_delegate,
25                             RenderFrameHostManager::Delegate* manager_delegate,
26                             int64 frame_id,
27                             const std::string& name)
28    : frame_tree_(frame_tree),
29      navigator_(navigator),
30      render_manager_(this,
31                      render_frame_delegate,
32                      render_view_delegate,
33                      render_widget_delegate,
34                      manager_delegate),
35      frame_tree_node_id_(next_frame_tree_node_id_++),
36      frame_id_(frame_id),
37      frame_name_(name),
38      parent_(NULL) {}
39
40FrameTreeNode::~FrameTreeNode() {
41}
42
43bool FrameTreeNode::IsMainFrame() const {
44  return frame_tree_->root() == this;
45}
46
47void FrameTreeNode::AddChild(scoped_ptr<FrameTreeNode> child,
48                             int frame_routing_id) {
49  // Initialize the RenderFrameHost for the new node.  We always create child
50  // frames in the same SiteInstance as the current frame, and they can swap to
51  // a different one if they navigate away.
52  child->render_manager()->Init(
53      render_manager_.current_host()->GetSiteInstance()->GetBrowserContext(),
54      render_manager_.current_host()->GetSiteInstance(),
55      render_manager_.current_host()->GetRoutingID(),
56      frame_routing_id);
57  child->set_parent(this);
58  children_.push_back(child.release());
59}
60
61void FrameTreeNode::RemoveChild(FrameTreeNode* child) {
62  std::vector<FrameTreeNode*>::iterator iter;
63
64  for (iter = children_.begin(); iter != children_.end(); ++iter) {
65    if ((*iter) == child)
66      break;
67  }
68
69  if (iter != children_.end()) {
70    (*iter)->set_parent(NULL);
71    children_.erase(iter);
72  }
73}
74
75void FrameTreeNode::ResetForNewProcess() {
76  frame_id_ = kInvalidFrameId;
77  current_url_ = GURL();
78
79  // The children may not have been cleared if a cross-process navigation
80  // commits before the old process cleans everything up.  Make sure the child
81  // nodes get deleted before swapping to a new process.
82  children_.clear();
83}
84
85}  // namespace content
86