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 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 37 FrameTreeNode::~FrameTreeNode() { 38 } 39 40 bool FrameTreeNode::IsMainFrame() const { 41 return frame_tree_->root() == this; 42 } 43 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 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 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
