linux aura: Support touch events.

ui/views/widget/desktop_aura/desktop_root_window_host_x11.cc

Index: ui/views/widget/desktop_aura/desktop_root_window_host_x11.cc
diff --git a/ui/views/widget/desktop_aura/desktop_root_window_host_x11.cc b/ui/views/widget/desktop_aura/desktop_root_window_host_x11.cc
index 37c9fa76d7a05c54380e9aaf3db06e5ac95abb54..eac7132635e4ab1029e133022ac06e583820f831 100644
--- a/ui/views/widget/desktop_aura/desktop_root_window_host_x11.cc
+++ b/ui/views/widget/desktop_aura/desktop_root_window_host_x11.cc
@@ -1113,6 +1113,17 @@ void DesktopRootWindowHostX11::DispatchMouseEvent(ui::MouseEvent* event) {
   }
 }
 
+void DesktopRootWindowHostX11::DispatchTouchEvent(ui::TouchEvent* event) {
+  if (g_current_capture && g_current_capture != this &&
+      event->type() == ui::ET_MOUSE_PRESSED) {

[dshwang, 2013/12/04 17:37:27]

s/ET_MOUSE_PRESSED/ET_TOUCH_PRESSED/ ?

why DispatchMouseEvent() does not check event type?

void DesktopRootWindowHostX11::DispatchMouseEvent(ui::MouseEvent* event) {
  if (!g_current_capture || g_current_capture == this) {
    delegate_->OnHostMouseEvent(event);
  } else {
    // Another DesktopRootWindowHostX11 has installed itself as
    // capture. Translate the event's location and dispatch to the other.
    event->ConvertLocationToTarget(root_window_->window(),
                                   g_current_capture->root_window_->window());
    g_current_capture->delegate_->OnHostMouseEvent(event);
  }
}

[sadrul, 2013/12/04 17:57:29]

Whoops. Fixed.
When a capture is in progress, all mouse events should go to the captured
window. For touch events, if the active touch-points aren't re-targeted when a
capture happens, then the touch events should continue to go to the old target.

+    event->ConvertLocationToTarget(root_window_->window(),
+                                   g_current_capture->root_window_->window());
+    g_current_capture->delegate_->OnHostTouchEvent(event);
+  } else {
+    delegate_->OnHostTouchEvent(event);
+  }
+}
+
 void DesktopRootWindowHostX11::ResetWindowRegion() {
   if (!IsMaximized()) {
     gfx::Path window_mask;
@@ -1278,17 +1289,17 @@ bool DesktopRootWindowHostX11::Dispatch(const base::NativeEvent& event) {
       int num_coalesced = 0;
 
       switch (type) {
-        // case ui::ET_TOUCH_MOVED:
-        //   num_coalesced = CoalescePendingMotionEvents(xev, &last_event);
-        //   if (num_coalesced > 0)
-        //     xev = &last_event;
-        //   // fallthrough
-        // case ui::ET_TOUCH_PRESSED:
-        // case ui::ET_TOUCH_RELEASED: {
-        //   ui::TouchEvent touchev(xev);
-        //   delegate_->OnHostTouchEvent(&touchev);
-        //   break;
-        // }
+        case ui::ET_TOUCH_MOVED:
+          num_coalesced = ui::CoalescePendingMotionEvents(xev, &last_event);
+          if (num_coalesced > 0)
+            xev = &last_event;
+          // fallthrough
+        case ui::ET_TOUCH_PRESSED:
+        case ui::ET_TOUCH_RELEASED: {
+          ui::TouchEvent touchev(xev);
+          DispatchTouchEvent(&touchev);
+          break;
+        }
         case ui::ET_MOUSE_MOVED:
         case ui::ET_MOUSE_DRAGGED:
         case ui::ET_MOUSE_PRESSED: