Implement DocuementHasImages

Requires new plumbing to get custom android_webview
layer IPC messages a flowing.

BUG=


Review URL: https://chromiumcodereview.appspot.com/10890024

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@154564 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 89 insertions, 0 deletions

diff --git a/android_webview/renderer/DEPS b/android_webview/renderer/DEPS
new file mode 100644
index 0000000..d72bd7c
--- /dev/null
+++ b/android_webview/renderer/DEPS
@@ -0,0 +1,3 @@
+include_rules = [
+  "+third_party/WebKit/Source/WebKit/chromium",
+]
diff --git a/android_webview/renderer/aw_render_view_ext.cc b/android_webview/renderer/aw_render_view_ext.cc
new file mode 100644
index 0000000..ae0035d
--- /dev/null
+++ b/android_webview/renderer/aw_render_view_ext.cc
@@ -0,0 +1,51 @@
+// Copyright (c) 2012 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 "android_webview/renderer/aw_render_view_ext.h"
+
+#include "android_webview/common/render_view_messages.h"
+#include "content/public/renderer/render_view.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebDocument.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebElement.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebVector.h"
+
+namespace android_webview {
+
+AwRenderViewExt::AwRenderViewExt(content::RenderView* render_view)
+    : content::RenderViewObserver(render_view) {
+}
+
+AwRenderViewExt::~AwRenderViewExt() {}
+
+// static
+void AwRenderViewExt::RenderViewCreated(content::RenderView* render_view) {
+  new AwRenderViewExt(render_view);  // |render_view| takes ownership.
+}
+
+bool AwRenderViewExt::OnMessageReceived(const IPC::Message& message) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(AwRenderViewExt, message)
+    IPC_MESSAGE_HANDLER(AwViewMsg_DocumentHasImages, OnDocumentHasImagesRequest)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled;
+}
+
+void AwRenderViewExt::OnDocumentHasImagesRequest(int id) {
+  bool hasImages = false;
+  if (render_view()) {
+    WebKit::WebView* webview = render_view()->GetWebView();
+    if (webview) {
+      WebKit::WebVector<WebKit::WebElement> images;
+      webview->mainFrame()->document().images(images);
+      hasImages = !images.isEmpty();
+    }
+  }
+  Send(new AwViewHostMsg_DocumentHasImagesResponse(routing_id(), id,
+                                                   hasImages));
+}
+
+}  // namespace android_webview
diff --git a/android_webview/renderer/aw_render_view_ext.h b/android_webview/renderer/aw_render_view_ext.h
new file mode 100644
index 0000000..fa58872
--- /dev/null
+++ b/android_webview/renderer/aw_render_view_ext.h
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 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.
+
+#ifndef ANDROID_WEBVIEW_RENDERER_AW_RENDER_VIEW_EXT_H_
+#define ANDROID_WEBVIEW_RENDERER_AW_RENDER_VIEW_EXT_H_
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "content/public/renderer/render_view_observer.h"
+
+namespace android_webview {
+
+// Render process side of AwRenderViewHostExt, this provides cross-process
+// implementation of miscellaneous WebView functions that we need to poke
+// WebKit directly to implement (and that aren't needed in the chrome app).
+class AwRenderViewExt : public content::RenderViewObserver {
+ public:
+  static void RenderViewCreated(content::RenderView* render_view);
+
+ private:
+  AwRenderViewExt(content::RenderView* render_view);
+  virtual ~AwRenderViewExt();
+
+  // RenderView::Observer:
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
+
+  void OnDocumentHasImagesRequest(int id);
+
+  DISALLOW_COPY_AND_ASSIGN(AwRenderViewExt);
+};
+
+}  // namespace android_webview
+
+#endif  // ANDROID_WEBVIEW_RENDERER_AW_RENDER_VIEW_EXT_H_