Consolidate/cleanup event cracking code; single out GdkEvents.

views/events/event_gtk.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 "views/events/event.h"
 
 #include <gdk/gdk.h>
 
 #include "base/logging.h"
 #include "ui/base/keycodes/keyboard_code_conversion_gtk.h"
-
-namespace views {
+#include "ui/gfx/point.h"
 
 namespace {
 
-ui::EventType EventTypeFromNative(NativeEvent native_event) {
-  // Add new event types as necessary.
-  switch (native_event->type) {
-    case GDK_2BUTTON_PRESS:
-    case GDK_3BUTTON_PRESS:
-    case GDK_BUTTON_PRESS:
-      return ui::ET_MOUSE_PRESSED;
-    case GDK_BUTTON_RELEASE:
-      return ui::ET_MOUSE_RELEASED;
-    case GDK_DRAG_MOTION:
-      return ui::ET_MOUSE_DRAGGED;
-    case GDK_ENTER_NOTIFY:
-      return ui::ET_MOUSE_ENTERED;
-    case GDK_KEY_PRESS:
-      return ui::ET_KEY_PRESSED;
-    case GDK_KEY_RELEASE:
-      return ui::ET_KEY_RELEASED;
-    case GDK_LEAVE_NOTIFY:
-      return ui::ET_MOUSE_EXITED;
-    case GDK_MOTION_NOTIFY:
-      if (native_event->motion.state & GDK_BUTTON1_MASK ||
-          native_event->motion.state & GDK_BUTTON2_MASK ||
-          native_event->motion.state & GDK_BUTTON3_MASK ||
-          native_event->motion.state & GDK_BUTTON4_MASK ||
-          native_event->motion.state & GDK_BUTTON5_MASK) {
-        return ui::ET_MOUSE_DRAGGED;
-      }
-      return ui::ET_MOUSE_MOVED;
-    case GDK_SCROLL:
-      return ui::ET_MOUSEWHEEL;
-    default:
-      NOTREACHED();
-      break;
-  }
-  return ui::ET_UNKNOWN;
-}
-
-GdkEventKey* GetGdkEventKeyFromNative(NativeEvent native_event) {
-  DCHECK(native_event->type == GDK_KEY_PRESS ||
-         native_event->type == GDK_KEY_RELEASE);
-  return &native_event->key;
-}
-
-gfx::Point GetMouseEventLocation(NativeEvent native_event) {
-  double x = 0, y = 0;
-  if (gdk_event_get_coords(native_event, &x, &y))
-    return gfx::Point(static_cast<int>(x), static_cast<int>(y));
-  return gfx::Point();
-}
-
-int GetMouseWheelOffset(NativeEvent native_event) {
-  DCHECK(native_event->type == GDK_SCROLL);
-  int offset = (native_event->scroll.direction == GDK_SCROLL_UP ||
-                native_event->scroll.direction == GDK_SCROLL_LEFT) ? 1 : -1;
-  return MouseWheelEvent::kWheelDelta * offset;
-}
-
-unsigned int GetGdkStateFromNative(NativeEvent native_event) {
-  switch (native_event->type) {
+unsigned int GetGdkStateFromNative(GdkEvent* gdk_event) {
+  switch (gdk_event->type) {
     case GDK_KEY_PRESS:
     case GDK_KEY_RELEASE:
-      return native_event->key.state;
+      return gdk_event->key.state;
     case GDK_BUTTON_PRESS:
     case GDK_2BUTTON_PRESS:
     case GDK_3BUTTON_PRESS:
     case GDK_BUTTON_RELEASE:
-      return native_event->button.state;
+      return gdk_event->button.state;
     case GDK_SCROLL:
-      return native_event->scroll.state;
+      return gdk_event->scroll.state;
     case GDK_MOTION_NOTIFY:
-      return native_event->motion.state;
+      return gdk_event->motion.state;
     case GDK_ENTER_NOTIFY:
     case GDK_LEAVE_NOTIFY:
-      return native_event->crossing.state;
+      return gdk_event->crossing.state;
     default:
       NOTREACHED();
       break;
   }
   return 0;
 }
 
 int GetFlagsFromGdkState(unsigned int state) {
   int flags = 0;
   flags |= (state & GDK_LOCK_MASK) ? ui::EF_CAPS_LOCK_DOWN : 0;
   flags |= (state & GDK_CONTROL_MASK) ? ui::EF_CONTROL_DOWN : 0;
   flags |= (state & GDK_SHIFT_MASK) ? ui::EF_SHIFT_DOWN : 0;
   flags |= (state & GDK_MOD1_MASK) ? ui::EF_ALT_DOWN : 0;
   flags |= (state & GDK_BUTTON1_MASK) ? ui::EF_LEFT_BUTTON_DOWN : 0;
   flags |= (state & GDK_BUTTON2_MASK) ? ui::EF_MIDDLE_BUTTON_DOWN : 0;
   flags |= (state & GDK_BUTTON3_MASK) ? ui::EF_RIGHT_BUTTON_DOWN : 0;
   return flags;
 }
 
-}  // namespace
+////////////////////////////////////////////////////////////////////////////////
+// These functions mirror ui/base/events.h, but GTK is in the midst of removal.
 
-////////////////////////////////////////////////////////////////////////////////
-// Event, public:
+ui::EventType EventTypeFromNative(GdkEvent* gdk_event) {
+  // Add new event types as necessary.
+  switch (gdk_event->type) {
+    case GDK_2BUTTON_PRESS:
+    case GDK_3BUTTON_PRESS:
+    case GDK_BUTTON_PRESS:
+      return ui::ET_MOUSE_PRESSED;
+    case GDK_BUTTON_RELEASE:
+      return ui::ET_MOUSE_RELEASED;
+    case GDK_DRAG_MOTION:
+      return ui::ET_MOUSE_DRAGGED;
+    case GDK_ENTER_NOTIFY:
+      return ui::ET_MOUSE_ENTERED;
+    case GDK_KEY_PRESS:
+      return ui::ET_KEY_PRESSED;
+    case GDK_KEY_RELEASE:
+      return ui::ET_KEY_RELEASED;
+    case GDK_LEAVE_NOTIFY:
+      return ui::ET_MOUSE_EXITED;
+    case GDK_MOTION_NOTIFY:
+      if (gdk_event->motion.state & GDK_BUTTON1_MASK ||
+          gdk_event->motion.state & GDK_BUTTON2_MASK ||
+          gdk_event->motion.state & GDK_BUTTON3_MASK ||
+          gdk_event->motion.state & GDK_BUTTON4_MASK ||
+          gdk_event->motion.state & GDK_BUTTON5_MASK) {
+        return ui::ET_MOUSE_DRAGGED;
+      }
+      return ui::ET_MOUSE_MOVED;
+    case GDK_SCROLL:
+      return ui::ET_MOUSEWHEEL;
+    default:
+      NOTREACHED();
+      break;
+  }
+  return ui::ET_UNKNOWN;
+}
 
-// static
-int Event::GetFlagsFromGdkEvent(NativeEvent native_event) {
-  int flags = GetFlagsFromGdkState(GetGdkStateFromNative(native_event));
-  if (native_event->type == GDK_2BUTTON_PRESS)
+int EventFlagsFromNative(GdkEvent* gdk_event) {
+  int flags = GetFlagsFromGdkState(GetGdkStateFromNative(gdk_event));
+  if (gdk_event->type == GDK_2BUTTON_PRESS)
     flags |= ui::EF_IS_DOUBLE_CLICK;
-  if (native_event->type == GDK_BUTTON_PRESS ||
-      native_event->type == GDK_2BUTTON_PRESS ||
-      native_event->type == GDK_3BUTTON_PRESS ||
-      native_event->type == GDK_BUTTON_RELEASE) {
-    switch (native_event->button.button) {
+  if (gdk_event->type == GDK_BUTTON_PRESS ||
+      gdk_event->type == GDK_2BUTTON_PRESS ||
+      gdk_event->type == GDK_3BUTTON_PRESS ||
+      gdk_event->type == GDK_BUTTON_RELEASE) {
+    switch (gdk_event->button.button) {
       case 1:
         return flags | ui::EF_LEFT_BUTTON_DOWN;
       case 2:
         return flags | ui::EF_MIDDLE_BUTTON_DOWN;
       case 3:
         return flags | ui::EF_RIGHT_BUTTON_DOWN;
     }
   }
   return flags;
 }
 
-////////////////////////////////////////////////////////////////////////////////
-// Event, private:
-
-void Event::Init() {
-  native_event_ = NULL;
-  native_event_2_ = NULL;
+gfx::Point EventLocationFromNative(GdkEvent* gdk_event) {
+  double x = 0, y = 0;
+  if (gdk_event_get_coords(gdk_event, &x, &y))
+    return gfx::Point(static_cast<int>(x), static_cast<int>(y));
+  return gfx::Point();
 }
 
-void Event::InitWithNativeEvent(NativeEvent native_event) {
-  native_event_ = native_event;
-  // TODO(beng): remove once we rid views of Gtk/Gdk.
-  native_event_2_ = NULL;
+ui::KeyboardCode KeyboardCodeFromNative(GdkEvent* gdk_event) {
+  DCHECK(gdk_event->type == GDK_KEY_PRESS ||
+         gdk_event->type == GDK_KEY_RELEASE);
+  return ui::KeyboardCodeFromGdkEventKey(&gdk_event->key);
+}
+
+
+bool IsMouseEvent(GdkEvent* gdk_event) {
+  return gdk_event->type == GDK_MOTION_NOTIFY ||
+         gdk_event->type == GDK_BUTTON_PRESS ||
+         gdk_event->type == GDK_2BUTTON_PRESS ||
+         gdk_event->type == GDK_3BUTTON_PRESS ||
+         gdk_event->type == GDK_BUTTON_RELEASE;
+}
+
+int GetMouseWheelOffset(GdkEvent* gdk_event) {
+  DCHECK(gdk_event->type == GDK_SCROLL);
+  int offset = (gdk_event->scroll.direction == GDK_SCROLL_UP ||
+                gdk_event->scroll.direction == GDK_SCROLL_LEFT) ? 1 : -1;
+  return offset;
+}
+
+}  // namespace
+
+namespace views {
+
+////////////////////////////////////////////////////////////////////////////////
+// Event, protected:
+
+Event::Event(GdkEvent* gdk_event, ui::EventType type, int flags)
+    : native_event_(NULL),
+      gdk_event_(gdk_event),
+      type_(type),
+      time_stamp_(base::Time::NowFromSystemTime()),
+      flags_(flags) {
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // LocatedEvent, protected:
 
-LocatedEvent::LocatedEvent(NativeEvent native_event)
-    : Event(native_event, EventTypeFromNative(native_event),
-            GetFlagsFromGdkEvent(native_event)),
-      location_(GetMouseEventLocation(native_event)) {
+LocatedEvent::LocatedEvent(GdkEvent* gdk_event)
+    : Event(gdk_event,
+            EventTypeFromNative(gdk_event),
+            EventFlagsFromNative(gdk_event)),
+      location_(EventLocationFromNative(gdk_event)) {
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// KeyEvent, public:
+
+KeyEvent::KeyEvent(GdkEvent* gdk_event)
+    : Event(gdk_event,
+            EventTypeFromNative(gdk_event),
+            EventFlagsFromNative(gdk_event)),
+      key_code_(KeyboardCodeFromNative(gdk_event)),
+      character_(0),
+      unmodified_character_(0) {
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // MouseEvent, public:
 
-MouseEvent::MouseEvent(NativeEvent native_event)
-    : LocatedEvent(native_event) {
-}
-
-////////////////////////////////////////////////////////////////////////////////
-// KeyEvent, public:
-
-KeyEvent::KeyEvent(NativeEvent native_event)
-    : Event(native_event, EventTypeFromNative(native_event),
-            GetFlagsFromGdkEvent(native_event)),
-      key_code_(ui::KeyboardCodeFromGdkEventKey(
-                GetGdkEventKeyFromNative(native_event))),
-      character_(0),
-      unmodified_character_(0) {
+MouseEvent::MouseEvent(GdkEvent* gdk_event)
+    : LocatedEvent(gdk_event) {
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // MouseWheelEvent, public:
 
-MouseWheelEvent::MouseWheelEvent(NativeEvent native_event)
-    : MouseEvent(native_event),
-      offset_(GetMouseWheelOffset(native_event)) {
+MouseWheelEvent::MouseWheelEvent(GdkEvent* gdk_event)
+    : MouseEvent(gdk_event),
+      offset_(kWheelDelta * GetMouseWheelOffset(gdk_event)) {
 }
 
 }  // namespace views