Cross-process postMessage

content/browser/content_frame.cc

+// Copyright (c) 2011 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_frame.h"
+
+#include "content/browser/frame_map.h"
+#include "content/browser/renderer_host/render_view_host.h"
+#include "content/public/browser/browser_context.h"
+
+namespace content {
+
+// This class tracks all frame loads for a top-level ContentFrame. This
+// updates the FrameMap with the current WebKitIdTuple for the ContentFrame
+// and its children.
+class ContentFrameObserver : public TabContentsObserver {
+ public:
+  ContentFrameObserver(ContentFrame* frame);
+   // TabContentsObserver methods
+  virtual void DidCommitProvisionalLoadForFrame(
+    int64 frame_id,
+    bool is_main_frame,
+    const GURL& url,
+    content::PageTransition transition_type) OVERRIDE;
+   virtual void TabContentsDestroyed(TabContents* tab) OVERRIDE;
+  private:
+  ContentFrame* frame_;
+};
+
+ContentFrameObserver::ContentFrameObserver(
+    ContentFrame* frame)
+  : TabContentsObserver(&frame->tab_contents()),
+    frame_(frame) {
+}
+
+void ContentFrameObserver::DidCommitProvisionalLoadForFrame(
+    int64 frame_id,
+    bool is_main_frame,
+    const GURL& url,
+    content::PageTransition transition_type) {
+  content::FrameMap* mapper =
+      frame_->tab_contents_.browser_context()->frame_mapper();
+
+  if (is_main_frame) {
+    mapper->UpdateFrame(
+        frame_, frame_->tab_contents_.render_view_host()->process()->GetID(),
+        frame_->tab_contents_.render_view_host()->routing_id(), frame_id);
+  } else {
+    // If we're navigating a subframe, we may need to create a ContentFrame
+    // TODO(supersat): This is hack until we get proper subframe support
+    ContentFrame* frame = mapper->FindRendererFrame(
+        frame_->tab_contents_.render_view_host()->process()->GetID(),
+        frame_id);
+
+    if (!frame) {
+      frame = mapper->InitializeFrame(false, frame_->tab_contents_, frame_);
+      mapper->UpdateFrame(frame,
+          frame_->tab_contents_.render_view_host()->process()->GetID(),
+          frame_->tab_contents_.render_view_host()->routing_id(),
+          frame_id);
+    }
+  }
+}
+
+void ContentFrameObserver::TabContentsDestroyed(TabContents* tab) {
+  delete this;
+}
+
+ContentFrame::ContentFrame(int64 id,
+                           bool is_top_level,
+                           TabContents& tab_contents,
+                           ContentFrame* opener)
+  : id_(id),
+    active_webkit_frame_(WebKitFrameIdentifier(-1, -1, -1)),
+    is_top_level_(is_top_level),
+    tab_contents_(tab_contents),
+    opener_(opener) {
+  if (is_top_level)
+    new ContentFrameObserver(this);
+}
+
+ContentFrame::~ContentFrame() {
+}
+
+void ContentFrame::UpdateFrame(int new_process_host_id,
+                               int new_route_id,
+                               int64 new_frame_id) {
+  WebKitFrameIdentifier newWebKitId(new_process_host_id, new_route_id,
+                                    new_frame_id);
+  active_webkit_frame_ = newWebKitId;
+
+  all_webkit_frames_.push_back(newWebKitId);
+}
+
+void ContentFrame::AddChildFrame(ContentFrame* child) {
+  children_.push_back(child);
+}
+
+void ContentFrame::RemoveChildren() {
+  children_.clear();
+}
+
+}  // namespace content