New InputMethod api for Views.

This CL adds:
1. Interfaces: InputMethod, InputMethodDelegate, TextInputClient.
2. InputMethodGtk: an InputMethod implementation based on GtkIMContext.
3. MockInputMethod: a mock InputMethod implementation for unit tests.

BUG=75003
TEST=none

Review URL: http://codereview.chromium.org/6688049

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@80076 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 56 insertions, 0 deletions

diff --git a/views/widget/widget.h b/views/widget/widget.h
index 39bb915..c57375d 100644
--- a/views/widget/widget.h
+++ b/views/widget/widget.h
@@ -95,6 +95,14 @@ class Widget : public internal::NativeWidgetDelegate,
   // view hierarchies that the locale has changed.
   static void NotifyLocaleChanged();
 
+  // Converts a rectangle from one Widget's coordinate system to another's.
+  // Returns false if the conversion couldn't be made, because either these two
+  // Widgets do not have a common ancestor or they are not on the screen yet.
+  // The value of |*rect| won't be changed when false is returned.
+  static bool ConvertRect(const Widget* source,
+                          const Widget* target,
+                          gfx::Rect* rect);
+
   // Unconverted methods -------------------------------------------------------
 
   // TODO(beng):
diff --git a/views/widget/widget_gtk.cc b/views/widget/widget_gtk.cc
index 1be51c9..9f53543 100644
--- a/views/widget/widget_gtk.cc
+++ b/views/widget/widget_gtk.cc
@@ -1561,6 +1561,32 @@ void Widget::NotifyLocaleChanged() {
   g_list_free(window_list);
 }
 
+// static
+bool Widget::ConvertRect(const Widget* source,
+                         const Widget* target,
+                         gfx::Rect* rect) {
+  DCHECK(source);
+  DCHECK(target);
+  DCHECK(rect);
+
+  GtkWidget* source_widget = source->GetNativeView();
+  GtkWidget* target_widget = target->GetNativeView();
+  if (source_widget == target_widget)
+    return true;
+
+  if (!source_widget || !target_widget)
+    return false;
+
+  GdkRectangle gdk_rect = rect->ToGdkRectangle();
+  if (gtk_widget_translate_coordinates(source_widget, target_widget,
+                                       gdk_rect.x, gdk_rect.y,
+                                       &gdk_rect.x, &gdk_rect.y)) {
+    *rect = gdk_rect;
+    return true;
+  }
+  return false;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // NativeWidget, public:
 
diff --git a/views/widget/widget_win.cc b/views/widget/widget_win.cc
index 4c8b974..613ddb6 100644
--- a/views/widget/widget_win.cc
+++ b/views/widget/widget_win.cc
@@ -1072,6 +1072,28 @@ void Widget::NotifyLocaleChanged() {
   NOTIMPLEMENTED();
 }
 
+bool Widget::ConvertRect(const Widget* source,
+                         const Widget* target,
+                         gfx::Rect* rect) {
+  DCHECK(source);
+  DCHECK(target);
+  DCHECK(rect);
+
+  HWND source_hwnd = source->GetNativeView();
+  HWND target_hwnd = target->GetNativeView();
+  if (source_hwnd == target_hwnd)
+    return true;
+
+  RECT win_rect = rect->ToRECT();
+  if (::MapWindowPoints(source_hwnd, target_hwnd,
+                        reinterpret_cast<LPPOINT>(&win_rect),
+                        sizeof(RECT)/sizeof(POINT))) {
+    *rect = win_rect;
+    return true;
+  }
+  return false;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // NativeWidget, public: