touchui: Directly process key and mouse events.

views/event_x.cc

+// 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.
+
+#include "views/event.h"
+
+#include <gdk/gdkx.h>
+
+#include "app/keyboard_code_conversion_x.h"
+#include "views/widget/root_view.h"
+#include "views/widget/widget_gtk.h"
+
+namespace views {
+
+namespace {
+
+int GetEventFlagsFromXState(unsigned int state) {
+  int flags = 0;
+  if (state & ControlMask)
+    flags |= Event::EF_CONTROL_DOWN;
+  if (state & ShiftMask)
+    flags |= Event::EF_SHIFT_DOWN;
+  if (state & Mod1Mask)
+    flags |= Event::EF_ALT_DOWN;
+  if (state & Button1Mask)
+    flags |= Event::EF_LEFT_BUTTON_DOWN;
+  if (state & Button2Mask)
+    flags |= Event::EF_MIDDLE_BUTTON_DOWN;
+  if (state & Button3Mask)
+    flags |= Event::EF_RIGHT_BUTTON_DOWN;
+
+  return flags;
+}
+
+// Get the event flag for the button in XButtonEvent. During a KeyPress event,
+// |state| in XButtonEvent does not include the button that has just been
+// pressed. Instead |state| contains flags for the buttons (if any) that had
+// already been pressed before the current button, and |button| stores the most
+// current pressed button. So, if you press down left mouse button, and while
+// pressing it down, press down the right mouse button, then for the latter
+// event, |state| would have Button1Mask set but not Button3Mask, and |button|
+// would be 3.
+int GetEventFlagsForButton(int button) {
+  switch (button) {
+    case 1:
+      return Event::EF_LEFT_BUTTON_DOWN;
+    case 2:
+      return Event::EF_MIDDLE_BUTTON_DOWN;
+    case 3:
+      return Event::EF_RIGHT_BUTTON_DOWN;
+  }
+
+  DLOG(WARNING) << "Unexpected button (" << button << ") received.";
+  return 0;
+}
+
+Event::EventType GetMouseEventType(XEvent* xev) {
+  switch (xev->type) {
+    case ButtonPress:
+      return Event::ET_MOUSE_PRESSED;
+    case ButtonRelease:
+      return Event::ET_MOUSE_RELEASED;
+    case MotionNotify:
+      if (xev->xmotion.state & (Button1Mask | Button2Mask | Button3Mask)) {
+        return Event::ET_MOUSE_DRAGGED;
+      }
+      return Event::ET_MOUSE_MOVED;
+  }
+
+  return Event::ET_UNKNOWN;
+}
+
+gfx::Point GetMouseEventLocation(XEvent* xev) {
+  switch (xev->type) {
+    case ButtonPress:
+    case ButtonRelease:
+      return gfx::Point(xev->xbutton.x, xev->xbutton.y);
+
+    case MotionNotify:
+      return gfx::Point(xev->xmotion.x, xev->xmotion.y);
+  }
+
+  return gfx::Point();
+}
+
+int GetMouseEventFlags(XEvent* xev) {
+  switch (xev->type) {
+    case ButtonPress:
+    case ButtonRelease:
+      return GetEventFlagsFromXState(xev->xbutton.state) |
+             GetEventFlagsForButton(xev->xbutton.button);
+
+    case MotionNotify:
+      return GetEventFlagsFromXState(xev->xmotion.state);
+  }
+
+  return 0;
+}
+
+}  // namespace
+
+KeyEvent::KeyEvent(XEvent* xev)
+    : Event(xev->type == KeyPress ?
+            Event::ET_KEY_PRESSED : Event::ET_KEY_RELEASED,
+            GetEventFlagsFromXState(xev->xkey.state)),
+      key_code_(app::KeyboardCodeFromXKeyEvent(xev)),
+      repeat_count_(0),
+      message_flags_(0) {
+}
+
+MouseEvent::MouseEvent(XEvent* xev)
+    : LocatedEvent(GetMouseEventType(xev),
+                   GetMouseEventLocation(xev),
+                   GetMouseEventFlags(xev)) {
+}
+
+}  // namespace views