Implement keycode text conversion functions for Ozone.

chrome/test/chromedriver/keycode_text_conversion_ozone.cc

 // Copyright 2014 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 "base/logging.h"
+#include "base/strings/string16.h"
+#include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/test/chromedriver/chrome/ui_events.h"
 #include "chrome/test/chromedriver/keycode_text_conversion.h"
+#include "ui/events/event_constants.h"
+#include "ui/events/keycodes/dom3/dom_code.h"
+#include "ui/events/keycodes/keyboard_code_conversion.h"
+#include "ui/events/ozone/layout/keyboard_layout_engine.h"
+#include "ui/events/ozone/layout/keyboard_layout_engine_manager.h"
 
-// TODO(arunprasadr) Implement these functions properly for ozone platforms.
-bool ConvertKeyCodeToText(
-    ui::KeyboardCode key_code, int modifiers, std::string* text,
-        std::string* error_msg) {
-  *text = std::string();
-  *error_msg = std::string("Not Implemented");
-  NOTIMPLEMENTED();
-  return false;
+bool ConvertKeyCodeToText(ui::KeyboardCode key_code,
+                          int modifiers,
+                          std::string* text,
+                          std::string* error_msg) {
+  ui::KeyboardLayoutEngine* keyboard_layout_engine =
+      ui::KeyboardLayoutEngineManager::GetKeyboardLayoutEngine();
+  ui::DomCode dom_code = ui::UsLayoutKeyboardCodeToDomCode(key_code);
+  int event_flags = ui::EF_NONE;
+
+  // Chrome OS keyboards don't have meta or num lock keys, so these modifier
+  // masks are ignored. Only handle alt, ctrl and shift.
+  if (modifiers & kAltKeyModifierMask)
+    event_flags |= ui::EF_ALT_DOWN;
+  if (modifiers & kControlKeyModifierMask)
+    event_flags |= ui::EF_CONTROL_DOWN;
+  if (modifiers & kShiftKeyModifierMask)
+    event_flags |= ui::EF_SHIFT_DOWN;
+
+  ui::DomKey dom_key_ignored;
+  base::char16 str[2] = {'\0'};
+  ui::KeyboardCode key_code_ignored;
+  uint32 platform_keycode_ignored;
+
+  if (!keyboard_layout_engine->Lookup(dom_code, event_flags, &dom_key_ignored,
+                                      &str[0], &key_code_ignored,
+                                      &platform_keycode_ignored)) {
+    // Key codes like ui::VKEY_UNKNOWN need to be mapped to the empty string, so
+    // even if the lookup fails we still need to return true here.
+    *text = std::string();
+    return true;
+  }
+
+  if (!base::UTF16ToUTF8(str, base::c16len(str), text)) {
+    *error_msg = base::StringPrintf(
+        "unicode conversion failed for keycode %d with modifiers 0x%x",
+        key_code, modifiers);
+    return false;
+  }
+
+  return true;
 }
 
-bool ConvertCharToKeyCode(
-    base::char16 key, ui::KeyboardCode* key_code, int *necessary_modifiers,
-        std::string* error_msg) {
-  *error_msg = std::string("Not Implemented");
-  *necessary_modifiers = 0;
-  NOTIMPLEMENTED();
-  return false;
+bool ConvertCharToKeyCode(base::char16 key,
+                          ui::KeyboardCode* key_code,
+                          int* necessary_modifiers,
+                          std::string* error_msg) {
+  base::string16 key_string;
+  key_string.push_back(key);
+  std::string key_string_utf8 = base::UTF16ToUTF8(key_string);
+  bool found_code = false;
+  *error_msg = std::string();
+  // There doesn't seem to be a way to get a CrOS key code for a given unicode
+  // character. So here we check every key code to see if it produces the
+  // right character, as we do on Mac (see keycode_text_conversion_mac.mm).
+  for (int i = 0; i < 256; ++i) {
+    ui::KeyboardCode code = static_cast<ui::KeyboardCode>(i);
+    // Skip the numpad keys.
+    if (code >= ui::VKEY_NUMPAD0 && code <= ui::VKEY_DIVIDE)
+      continue;
+    std::string key_string;
+    if (!ConvertKeyCodeToText(code, 0, &key_string, error_msg))
+      return false;
+    found_code = key_string_utf8 == key_string;
+    std::string key_string_utf8_tmp;
+    if (!ConvertKeyCodeToText(code, kShiftKeyModifierMask, &key_string_utf8_tmp,
+                              error_msg))
+      return false;
+    if (!found_code && key_string_utf8 == key_string_utf8_tmp) {
+      *necessary_modifiers = kShiftKeyModifierMask;
+      found_code = true;
+    }
+    if (found_code) {
+      *key_code = code;
+      break;
+    }
+  }
+  return found_code;
 }