Plumb event flags (shift/alt/ctrl modifiers) for drag/drop events to WebKit.

content/browser/web_contents/web_drag_dest_gtk.cc

 // 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 "content/browser/web_contents/web_drag_dest_gtk.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/file_path.h"
 #include "base/message_loop.h"
 #include "base/utf_string_conversions.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
 #include "content/browser/web_contents/drag_utils_gtk.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/public/browser/web_drag_dest_delegate.h"
 #include "content/public/common/url_constants.h"
 #include "net/base/net_util.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebInputEvent.h"
 #include "ui/base/clipboard/custom_data_helper.h"
 #include "ui/base/dragdrop/gtk_dnd_util.h"
 #include "ui/base/gtk/gtk_screen_util.h"
 
 using content::RenderViewHostImpl;
 using WebKit::WebDragOperation;
 using WebKit::WebDragOperationNone;
 
 namespace content {
 
+namespace {
+
+int GetModifierFlags(GtkWidget* widget) {
+  int modifier_state = 0;
+  GdkModifierType state;
+  gdk_window_get_pointer(gtk_widget_get_window(widget), NULL, NULL, &state);
+
+  if (state & GDK_SHIFT_MASK)
+    modifier_state |= WebKit::WebInputEvent::ShiftKey;
+  if (state & GDK_CONTROL_MASK)
+    modifier_state |= WebKit::WebInputEvent::ControlKey;
+  if (state & GDK_MOD1_MASK)
+    modifier_state |= WebKit::WebInputEvent::AltKey;
+  if (state & GDK_META_MASK)
+    modifier_state |= WebKit::WebInputEvent::MetaKey;
+  return modifier_state;
+}
+
+}  // namespace
+
 WebDragDestGtk::WebDragDestGtk(WebContents* web_contents, GtkWidget* widget)
     : web_contents_(web_contents),
       widget_(widget),
       context_(NULL),
       data_requests_(0),
       delegate_(NULL),
       method_factory_(this) {
   gtk_drag_dest_set(widget, static_cast<GtkDestDefaults>(0),
                     NULL, 0,
                     static_cast<GdkDragAction>(GDK_ACTION_COPY |
@@ skipping 75 matching lines @@
     }
 
     if (delegate()) {
       gtk_drag_get_data(widget_, context, delegate()->GetBookmarkTargetAtom(),
                         time);
     }
   } else if (data_requests_ == 0) {
     GetRenderViewHost()->DragTargetDragOver(
         ui::ClientPoint(widget_),
         ui::ScreenPoint(widget_),
-        content::GdkDragActionToWebDragOp(context->actions));
+        content::GdkDragActionToWebDragOp(context->actions),
+        GetModifierFlags(widget_));
 
     if (delegate())
       delegate()->OnDragOver();
 
     drag_over_time_ = time;
   }
 
   // Pretend we are a drag destination because we don't want to wait for
   // the renderer to tell us if we really are or not.
   return TRUE;
@@ skipping 87 matching lines @@
     }
   }
 
   if (data_requests_ == 0) {
     // Tell the renderer about the drag.
     // |x| and |y| are seemingly arbitrary at this point.
     GetRenderViewHost()->DragTargetDragEnter(
         *drop_data_.get(),
         ui::ClientPoint(widget_),
         ui::ScreenPoint(widget_),
-        content::GdkDragActionToWebDragOp(context->actions));
+        content::GdkDragActionToWebDragOp(context->actions),
+        GetModifierFlags(widget_));
 
     if (delegate())
       delegate()->OnDragEnter();
 
     drag_over_time_ = time;
   }
 }
 
 // The drag has left our widget; forward this information to the renderer.
 void WebDragDestGtk::OnDragLeave(GtkWidget* sender, GdkDragContext* context,
@@ skipping 10 matching lines @@
       base::Bind(&WebDragDestGtk::DragLeave, method_factory_.GetWeakPtr()));
 }
 
 // Called by GTK when the user releases the mouse, executing a drop.
 gboolean WebDragDestGtk::OnDragDrop(GtkWidget* sender, GdkDragContext* context,
                                     gint x, gint y, guint time) {
   // Cancel that drag leave!
   method_factory_.InvalidateWeakPtrs();
 
   GetRenderViewHost()->
-      DragTargetDrop(ui::ClientPoint(widget_), ui::ScreenPoint(widget_));
+      DragTargetDrop(ui::ClientPoint(widget_), ui::ScreenPoint(widget_),
+          GetModifierFlags(widget_));
 
   if (delegate())
     delegate()->OnDrop();
 
   // The second parameter is just an educated guess as to whether or not the
   // drag succeeded, but at least we will get the drag-end animation right
   // sometimes.
   gtk_drag_finish(context, is_drop_target_, FALSE, time);
 
   return TRUE;
 }
 
 RenderViewHostImpl* WebDragDestGtk::GetRenderViewHost() const {
   return static_cast<RenderViewHostImpl*>(web_contents_->GetRenderViewHost());
 }
 
 }  // namespace content