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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/frame_host/frame_tree.h"
#include <queue>
#include "base/bind.h"
#include "base/callback.h"
#include "content/browser/frame_host/frame_tree_node.h"
#include "content/browser/frame_host/navigator.h"
#include "content/browser/frame_host/render_frame_host_factory.h"
#include "content/browser/frame_host/render_frame_host_impl.h"
#include "content/browser/renderer_host/render_view_host_factory.h"
#include "content/browser/renderer_host/render_view_host_impl.h"
namespace content {
namespace {
// Used with FrameTree::ForEach() to search for the FrameTreeNode
// corresponding to |frame_tree_node_id|.
bool FrameTreeNodeForId(int64 frame_tree_node_id,
FrameTreeNode** out_node,
FrameTreeNode* node) {
if (node->frame_tree_node_id() == frame_tree_node_id) {
*out_node = node;
// Terminate iteration once the node has been found.
return false;
}
return true;
}
// TODO(creis): Remove this version along with FrameTreeNode::frame_id().
bool FrameTreeNodeForFrameId(int64 frame_id,
FrameTreeNode** out_node,
FrameTreeNode* node) {
if (node->frame_id() == frame_id) {
*out_node = node;
// Terminate iteration once the node has been found.
return false;
}
return true;
}
} // namespace
FrameTree::FrameTree(Navigator* navigator,
RenderFrameHostDelegate* render_frame_delegate,
RenderViewHostDelegate* render_view_delegate,
RenderWidgetHostDelegate* render_widget_delegate,
RenderFrameHostManager::Delegate* manager_delegate)
: render_frame_delegate_(render_frame_delegate),
render_view_delegate_(render_view_delegate),
render_widget_delegate_(render_widget_delegate),
manager_delegate_(manager_delegate),
root_(new FrameTreeNode(this,
navigator,
render_frame_delegate,
render_view_delegate,
render_widget_delegate,
manager_delegate,
FrameTreeNode::kInvalidFrameId,
std::string())) {
}
FrameTree::~FrameTree() {
}
FrameTreeNode* FrameTree::FindByID(int64 frame_tree_node_id) {
FrameTreeNode* node = NULL;
ForEach(base::Bind(&FrameTreeNodeForId, frame_tree_node_id, &node));
return node;
}
void FrameTree::ForEach(
const base::Callback<bool(FrameTreeNode*)>& on_node) const {
std::queue<FrameTreeNode*> queue;
queue.push(root_.get());
while (!queue.empty()) {
FrameTreeNode* node = queue.front();
queue.pop();
if (!on_node.Run(node))
break;
for (size_t i = 0; i < node->child_count(); ++i)
queue.push(node->child_at(i));
}
}
bool FrameTree::IsFirstNavigationAfterSwap() const {
return root_->frame_id() == FrameTreeNode::kInvalidFrameId;
}
void FrameTree::OnFirstNavigationAfterSwap(int main_frame_id) {
root_->set_frame_id(main_frame_id);
}
RenderFrameHostImpl* FrameTree::AddFrame(int frame_routing_id,
int64 parent_frame_id,
int64 frame_id,
const std::string& frame_name) {
FrameTreeNode* parent = FindByFrameID(parent_frame_id);
// TODO(ajwong): Should the renderer be killed here? Would there be a race on
// shutdown that might make this case possible?
if (!parent)
return NULL;
scoped_ptr<FrameTreeNode> node(new FrameTreeNode(
this, parent->navigator(), render_frame_delegate_, render_view_delegate_,
render_widget_delegate_, manager_delegate_, frame_id, frame_name));
RenderFrameHostImpl* render_frame = node->current_frame_host();
parent->AddChild(node.Pass(), frame_routing_id);
return render_frame;
}
void FrameTree::RemoveFrame(RenderFrameHostImpl* render_frame_host,
int64 parent_frame_id,
int64 frame_id) {
// If switches::kSitePerProcess is not specified, then the FrameTree only
// contains a node for the root element. However, even in this case
// frame detachments need to be broadcast outwards.
//
// TODO(ajwong): Move this below the |parent| check after the FrameTree is
// guaranteed to be correctly populated even without the
// switches::kSitePerProcess flag.
FrameTreeNode* parent = FindByFrameID(parent_frame_id);
FrameTreeNode* child = FindByFrameID(frame_id);
if (!on_frame_removed_.is_null()) {
on_frame_removed_.Run(
render_frame_host->render_view_host(), frame_id);
}
// TODO(ajwong): Should the renderer be killed here? Would there be a race on
// shutdown that might make this case possible?
if (!parent || !child)
return;
parent->RemoveChild(child);
}
void FrameTree::SetFrameUrl(int64 frame_id, const GURL& url) {
FrameTreeNode* node = FindByFrameID(frame_id);
// TODO(ajwong): Should the renderer be killed here? Would there be a race on
// shutdown that might make this case possible?
if (!node)
return;
if (node)
node->set_current_url(url);
}
void FrameTree::ResetForMainFrameSwap() {
return root_->ResetForMainFrameSwap();
}
RenderFrameHostImpl* FrameTree::GetMainFrame() const {
return root_->current_frame_host();
}
void FrameTree::SetFrameRemoveListener(
const base::Callback<void(RenderViewHostImpl*, int64)>& on_frame_removed) {
on_frame_removed_ = on_frame_removed;
}
void FrameTree::ClearFrameRemoveListenerForTesting() {
on_frame_removed_.Reset();
}
RenderViewHostImpl* FrameTree::CreateRenderViewHostForMainFrame(
SiteInstance* site_instance,
int routing_id,
int main_frame_routing_id,
bool swapped_out,
bool hidden) {
DCHECK(main_frame_routing_id != MSG_ROUTING_NONE);
RenderViewHostMap::iterator iter =
render_view_host_map_.find(site_instance->GetId());
CHECK(iter == render_view_host_map_.end());
RenderViewHostImpl* rvh = static_cast<RenderViewHostImpl*>(
RenderViewHostFactory::Create(site_instance,
render_view_delegate_,
render_widget_delegate_,
routing_id,
main_frame_routing_id,
swapped_out,
hidden));
render_view_host_map_[site_instance->GetId()] =
RenderViewHostRefCount(rvh, 0);
return rvh;
}
RenderViewHostImpl* FrameTree::GetRenderViewHostForSubFrame(
SiteInstance* site_instance) {
RenderViewHostMap::iterator iter =
render_view_host_map_.find(site_instance->GetId());
CHECK(iter != render_view_host_map_.end());
RenderViewHostRefCount rvh_refcount = iter->second;
return rvh_refcount.first;
}
void FrameTree::RegisterRenderFrameHost(
RenderFrameHostImpl* render_frame_host) {
SiteInstance* site_instance =
render_frame_host->render_view_host()->GetSiteInstance();
RenderViewHostMap::iterator iter =
render_view_host_map_.find(site_instance->GetId());
CHECK(iter != render_view_host_map_.end());
// Increment the refcount.
CHECK_GE(iter->second.second, 0);
iter->second.second++;
}
void FrameTree::UnregisterRenderFrameHost(
RenderFrameHostImpl* render_frame_host) {
SiteInstance* site_instance =
render_frame_host->render_view_host()->GetSiteInstance();
RenderViewHostMap::iterator iter =
render_view_host_map_.find(site_instance->GetId());
CHECK(iter != render_view_host_map_.end());
// Decrement the refcount and shutdown the RenderViewHost if no one else is
// using it.
CHECK_GT(iter->second.second, 0);
iter->second.second--;
if (iter->second.second == 0) {
iter->second.first->Shutdown();
render_view_host_map_.erase(iter);
}
}
FrameTreeNode* FrameTree::FindByFrameID(int64 frame_id) {
FrameTreeNode* node = NULL;
ForEach(base::Bind(&FrameTreeNodeForFrameId, frame_id, &node));
return node;
}
} // namespace content
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