chrome/test/chromedriver/keycode_text_conversion_ozone.cc

   1 // Copyright 2014 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 "base/strings/string16.h"
   6 #include "base/strings/stringprintf.h"
   7 #include "base/strings/utf_string_conversion_utils.h"
   8 #include "base/strings/utf_string_conversions.h"
   9 #include "chrome/test/chromedriver/chrome/ui_events.h"
  10 #include "chrome/test/chromedriver/keycode_text_conversion.h"
  11 #include "ui/events/event_constants.h"
  12 #include "ui/events/keycodes/dom/dom_code.h"
  13 #include "ui/events/keycodes/dom/keycode_converter.h"
  14 #include "ui/events/keycodes/keyboard_code_conversion.h"
  15 #include "ui/events/ozone/layout/keyboard_layout_engine.h"
  16 #include "ui/events/ozone/layout/keyboard_layout_engine_manager.h"
  17
  18 bool ConvertKeyCodeToText(ui::KeyboardCode key_code,
  19                           int modifiers,
  20                           std::string* text,
  21                           std::string* error_msg) {
  22   ui::KeyboardLayoutEngine* keyboard_layout_engine =
  23       ui::KeyboardLayoutEngineManager::GetKeyboardLayoutEngine();
  24   ui::DomCode dom_code = ui::UsLayoutKeyboardCodeToDomCode(key_code);
  25   int event_flags = ui::EF_NONE;
  26
  27   // Chrome OS keyboards don't have meta or num lock keys, so these modifier
  28   // masks are ignored. Only handle alt, ctrl and shift.
  29   if (modifiers & kAltKeyModifierMask)
  30     event_flags |= ui::EF_ALT_DOWN;
  31   if (modifiers & kControlKeyModifierMask)
  32     event_flags |= ui::EF_CONTROL_DOWN;
  33   if (modifiers & kShiftKeyModifierMask)
  34     event_flags |= ui::EF_SHIFT_DOWN;
  35
  36   ui::DomKey dom_key;
  37   ui::KeyboardCode key_code_ignored;
  38
  39   if (!keyboard_layout_engine->Lookup(dom_code, event_flags, &dom_key,
  40                                       &key_code_ignored) ||
  41       !dom_key.IsCharacter()) {
  42     // The keycode lookup failed, or mapped to a key that isn't a unicode
  43     // character. Convert it to the empty string.
  44     *text = std::string();
  45     return true;
  46   }
  47
  48   base::WriteUnicodeCharacter(dom_key.ToCharacter(), text);
  49   return true;
  50 }
  51
  52 bool ConvertCharToKeyCode(base::char16 key,
  53                           ui::KeyboardCode* key_code,
  54                           int* necessary_modifiers,
  55                           std::string* error_msg) {
  56   base::string16 key_string;
  57   key_string.push_back(key);
  58   std::string key_string_utf8 = base::UTF16ToUTF8(key_string);
  59   bool found_code = false;
  60   *error_msg = std::string();
  61   // There doesn't seem to be a way to get a CrOS key code for a given unicode
  62   // character. So here we check every key code to see if it produces the
  63   // right character, as we do on Mac (see keycode_text_conversion_mac.mm).
  64   for (int i = 0; i < 256; ++i) {
  65     ui::KeyboardCode code = static_cast<ui::KeyboardCode>(i);
  66     // Skip the numpad keys.
  67     if (code >= ui::VKEY_NUMPAD0 && code <= ui::VKEY_DIVIDE)
  68       continue;
  69     std::string key_string;
  70     if (!ConvertKeyCodeToText(code, 0, &key_string, error_msg))
  71       return false;
  72     found_code = key_string_utf8 == key_string;
  73     std::string key_string_utf8_tmp;
  74     if (!ConvertKeyCodeToText(code, kShiftKeyModifierMask, &key_string_utf8_tmp,
  75                               error_msg))
  76       return false;
  77     if (!found_code && key_string_utf8 == key_string_utf8_tmp) {
  78       *necessary_modifiers = kShiftKeyModifierMask;
  79       found_code = true;
  80     }
  81     if (found_code) {
  82       *key_code = code;
  83       break;
  84     }
  85   }
  86   return found_code;
  87 }