remoting/client/key_event_mapper.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 "remoting/client/key_event_mapper.h"
   6
   7 #include "remoting/proto/event.pb.h"
   8
   9 namespace remoting {
  10
  11 KeyEventMapper::KeyEventMapper() {
  12 }
  13
  14 KeyEventMapper::KeyEventMapper(InputStub* stub) : protocol::InputFilter(stub) {
  15 }
  16
  17 KeyEventMapper::~KeyEventMapper() {
  18 }
  19
  20 void KeyEventMapper::SetTrapCallback(KeyTrapCallback callback) {
  21   trap_callback = callback;
  22 }
  23
  24 void KeyEventMapper::TrapKey(uint32 usb_keycode, bool trap_key) {
  25   if (trap_key) {
  26     trapped_keys.insert(usb_keycode);
  27   } else {
  28     trapped_keys.erase(usb_keycode);
  29   }
  30 }
  31
  32 void KeyEventMapper::RemapKey(uint32 in_usb_keycode, uint32 out_usb_keycode) {
  33   if (in_usb_keycode == out_usb_keycode) {
  34     mapped_keys.erase(in_usb_keycode);
  35   } else {
  36     mapped_keys[in_usb_keycode] = out_usb_keycode;
  37   }
  38 }
  39
  40 void KeyEventMapper::InjectKeyEvent(const protocol::KeyEvent& event) {
  41   if (event.has_usb_keycode()) {
  42     // Deliver trapped keys to the callback, not the next stub.
  43     if (!trap_callback.is_null() && event.has_pressed() &&
  44         (trapped_keys.find(event.usb_keycode()) != trapped_keys.end())) {
  45       trap_callback.Run(event);
  46       return;
  47     }
  48
  49     // Re-map mapped keys to the new value before passing them on.
  50     std::map<uint32,uint32>::iterator mapped =
  51         mapped_keys.find(event.usb_keycode());
  52     if (mapped != mapped_keys.end()) {
  53       protocol::KeyEvent new_event(event);
  54       new_event.set_usb_keycode(mapped->second);
  55       InputFilter::InjectKeyEvent(new_event);
  56       return;
  57     }
  58   }
  59
  60   InputFilter::InjectKeyEvent(event);
  61 }
  62
  63 }  // namespace remoting