src/ash/wm/event_rewriter_event_filter.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ash/wm/event_rewriter_event_filter.h"
   6
   7 #include "ash/event_rewriter_delegate.h"
   8 #include "base/logging.h"
   9 #include "ui/events/event.h"
  10
  11 #if defined(OS_CHROMEOS)
  12 #include "ash/wm/sticky_keys.h"
  13 #endif  // OS_CHROMEOS
  14 namespace ash {
  15 namespace internal {
  16
  17 EventRewriterEventFilter::EventRewriterEventFilter() {}
  18
  19 EventRewriterEventFilter::~EventRewriterEventFilter() {}
  20
  21 void EventRewriterEventFilter::SetEventRewriterDelegate(
  22     scoped_ptr<EventRewriterDelegate> delegate) {
  23   delegate_ = delegate.Pass();
  24 }
  25
  26 void EventRewriterEventFilter::EnableStickyKeys(bool enabled) {
  27 #if defined(OS_CHROMEOS)
  28   if (enabled)
  29     sticky_keys_.reset(new StickyKeys());
  30   else
  31     sticky_keys_.reset();
  32 #endif  // OS_CHROMEOS
  33 }
  34
  35 void EventRewriterEventFilter::OnKeyEvent(ui::KeyEvent* event) {
  36   if (!delegate_)
  37     return;
  38
  39   // Do not consume a translated key event which is generated by an IME.
  40   if (event->type() == ui::ET_TRANSLATED_KEY_PRESS ||
  41       event->type() == ui::ET_TRANSLATED_KEY_RELEASE) {
  42     return;
  43   }
  44
  45   switch (delegate_->RewriteOrFilterKeyEvent(event)) {
  46     case EventRewriterDelegate::ACTION_REWRITE_EVENT:
  47       break;
  48     case EventRewriterDelegate::ACTION_DROP_EVENT:
  49       event->StopPropagation();
  50       break;
  51   }
  52
  53   if (event->stopped_propagation())
  54     return;
  55
  56 #if defined(OS_CHROMEOS)
  57   if (sticky_keys_.get() && sticky_keys_->HandleKeyEvent(event))
  58     event->StopPropagation();
  59 #endif  // OS_CHROMEOS
  60 }
  61
  62 void EventRewriterEventFilter::OnMouseEvent(ui::MouseEvent* event) {
  63   if (!delegate_)
  64     return;
  65
  66   switch (delegate_->RewriteOrFilterLocatedEvent(event)) {
  67     case EventRewriterDelegate::ACTION_REWRITE_EVENT:
  68       return;
  69     case EventRewriterDelegate::ACTION_DROP_EVENT:
  70       event->StopPropagation();
  71       break;
  72   }
  73 }
  74
  75 }  // namespace internal
  76 }  // namespace ash