Add a private interface to the plugin and use it to know if the mouse is over a link.

Review URL: http://codereview.chromium.org/3562007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@61658 0039d316-1c4b-4281-b951-d872f2087c98

5 files changed, 61 insertions, 2 deletions

diff --git a/webkit/glue/plugins/pepper_plugin_instance.cc b/webkit/glue/plugins/pepper_plugin_instance.cc
index 143d9c0..d9e60ae 100644
--- a/webkit/glue/plugins/pepper_plugin_instance.cc
+++ b/webkit/glue/plugins/pepper_plugin_instance.cc
@@ -54,6 +54,7 @@
 #include "webkit/glue/plugins/pepper_string.h"
 #include "webkit/glue/plugins/pepper_url_loader.h"
 #include "webkit/glue/plugins/pepper_var.h"
+#include "webkit/glue/plugins/ppp_private.h"
 
 using WebKit::WebBindings;
 using WebKit::WebCanvas;
@@ -273,6 +274,7 @@ PluginInstance::PluginInstance(PluginDelegate* delegate,
       find_identifier_(-1),
       plugin_find_interface_(NULL),
       plugin_zoom_interface_(NULL),
+      plugin_private_interface_(NULL),
 #if defined (OS_LINUX)
       num_pages_(0),
       pdf_output_done_(false),
@@ -587,6 +589,21 @@ string16 PluginInstance::GetSelectedText(bool html) {
   return UTF8ToUTF16(string->value());
 }
 
+string16 PluginInstance::GetLinkAtPosition(const gfx::Point& point) {
+  if (!LoadPrivateInterface())
+    return string16();
+
+  PP_Point p;
+  p.x = point.x();
+  p.y = point.y();
+  PP_Var rv = plugin_private_interface_->GetLinkAtPosition(GetPPInstance(), p);
+  scoped_refptr<StringVar> string(StringVar::FromPPVar(rv));
+  Var::PluginReleasePPVar(rv);  // Release the ref the plugin transfered to us.
+  if (!string)
+    return string16();
+  return UTF8ToUTF16(string->value());
+}
+
 void PluginInstance::Zoom(double factor, bool text_only) {
   if (!LoadZoomInterface())
     return;
@@ -637,6 +654,16 @@ bool PluginInstance::LoadZoomInterface() {
   return !!plugin_zoom_interface_;
 }
 
+bool PluginInstance::LoadPrivateInterface() {
+  if (!plugin_private_interface_) {
+    plugin_private_interface_ =
+        reinterpret_cast<const PPP_Private*>(module_->GetPluginInterface(
+            PPP_PRIVATE_INTERFACE));
+  }
+
+  return !!plugin_private_interface_;
+}
+
 bool PluginInstance::PluginHasFocus() const {
   return has_webkit_focus_ && has_content_area_focus_;
 }
diff --git a/webkit/glue/plugins/pepper_plugin_instance.h b/webkit/glue/plugins/pepper_plugin_instance.h
index 97e026e..1604171 100644
--- a/webkit/glue/plugins/pepper_plugin_instance.h
+++ b/webkit/glue/plugins/pepper_plugin_instance.h
@@ -28,6 +28,7 @@ struct PPB_Fullscreen_Dev;
 struct PPB_Zoom_Dev;
 struct PPP_Find_Dev;
 struct PPP_Instance;
+struct PPP_Private;
 struct PPP_Zoom_Dev;
 
 class SkBitmap;
@@ -136,6 +137,7 @@ class PluginInstance : public base::RefCounted<PluginInstance> {
       gfx::Rect* clip);
 
   string16 GetSelectedText(bool html);
+  string16 GetLinkAtPosition(const gfx::Point& point);
   void Zoom(double factor, bool text_only);
   bool StartFind(const string16& search_text,
                  bool case_sensitive,
@@ -157,6 +159,7 @@ class PluginInstance : public base::RefCounted<PluginInstance> {
  private:
   bool LoadFindInterface();
   bool LoadZoomInterface();
+  bool LoadPrivateInterface();
 
   // Determines if we think the plugin has focus, both content area and webkit
   // (see has_webkit_focus_ below).
@@ -216,6 +219,7 @@ class PluginInstance : public base::RefCounted<PluginInstance> {
   // The plugin find and zoom interfaces.
   const PPP_Find_Dev* plugin_find_interface_;
   const PPP_Zoom_Dev* plugin_zoom_interface_;
+  const PPP_Private* plugin_private_interface_;
 
   // This is only valid between a successful PrintBegin call and a PrintEnd
   // call.
diff --git a/webkit/glue/plugins/pepper_webplugin_impl.cc b/webkit/glue/plugins/pepper_webplugin_impl.cc
index 86fcd83..0e6e92f 100644
--- a/webkit/glue/plugins/pepper_webplugin_impl.cc
+++ b/webkit/glue/plugins/pepper_webplugin_impl.cc
@@ -9,6 +9,7 @@
 #include "base/message_loop.h"
 #include "third_party/ppapi/c/pp_var.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebPluginParams.h"
+#include "third_party/WebKit/WebKit/chromium/public/WebPoint.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebRect.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebView.h"
 #include "webkit/glue/plugins/pepper_plugin_instance.h"
@@ -19,8 +20,10 @@
 using WebKit::WebCanvas;
 using WebKit::WebPluginContainer;
 using WebKit::WebPluginParams;
+using WebKit::WebPoint;
 using WebKit::WebRect;
 using WebKit::WebString;
+using WebKit::WebURL;
 using WebKit::WebVector;
 using WebKit::WebView;
 
@@ -161,14 +164,18 @@ bool WebPluginImpl::hasSelection() const {
   return !selectionAsText().isEmpty();
 }
 
-WebKit::WebString WebPluginImpl::selectionAsText() const {
+WebString WebPluginImpl::selectionAsText() const {
   return instance_->GetSelectedText(false);
 }
 
-WebKit::WebString WebPluginImpl::selectionAsMarkup() const {
+WebString WebPluginImpl::selectionAsMarkup() const {
   return instance_->GetSelectedText(true);
 }
 
+WebURL WebPluginImpl::linkAtPosition(const WebPoint& position) const {
+  return GURL(instance_->GetLinkAtPosition(position));
+}
+
 void WebPluginImpl::setZoomLevel(double level, bool text_only) {
   instance_->Zoom(WebView::zoomLevelToZoomFactor(level), text_only);
 }
diff --git a/webkit/glue/plugins/pepper_webplugin_impl.h b/webkit/glue/plugins/pepper_webplugin_impl.h
index 17ce979..3023d95 100644
--- a/webkit/glue/plugins/pepper_webplugin_impl.h
+++ b/webkit/glue/plugins/pepper_webplugin_impl.h
@@ -63,6 +63,7 @@ class WebPluginImpl : public WebKit::WebPlugin {
   virtual bool hasSelection() const;
   virtual WebKit::WebString selectionAsText() const;
   virtual WebKit::WebString selectionAsMarkup() const;
+  virtual WebKit::WebURL linkAtPosition(const WebKit::WebPoint& position) const;
   virtual void setZoomLevel(double level, bool text_only);
   virtual bool startFind(const WebKit::WebString& search_text,
                          bool case_sensitive,
diff --git a/webkit/glue/plugins/ppp_private.h b/webkit/glue/plugins/ppp_private.h
new file mode 100644
index 0000000..4bc3812
--- /dev/null
+++ b/webkit/glue/plugins/ppp_private.h
@@ -0,0 +1,20 @@
+// Copyright (c) 2010 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 WEBKIT_GLUE_PLUGINS_PPP_PRIVATE_H_
+#define WEBKIT_GLUE_PLUGINS_PPP_PRIVATE_H_
+
+#include "third_party/ppapi/c/pp_instance.h"
+#include "third_party/ppapi/c/pp_point.h"
+#include "third_party/ppapi/c/pp_var.h"
+
+#define PPP_PRIVATE_INTERFACE "PPP_Private;1"
+
+struct PPP_Private {
+  // Returns an absolute URL if the position is over a link.
+  PP_Var (*GetLinkAtPosition)(PP_Instance instance,
+                              PP_Point point);
+};
+
+#endif  // WEBKIT_GLUE_PLUGINS_PPP_PRIVATE_H_