Add facitility for Global Keyboard shortcuts.

chrome/browser/global_keyboard_shortcuts_mac.mm

+// Copyright (c) 2009 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 "chrome/browser/global_keyboard_shortcuts_mac.h"
+
+#include "base/basictypes.h"
+#include "chrome/app/chrome_dll_resource.h"
+
+const KeyboardShortcutData* GetKeyboardShortCutTable(size_t* num_entries) {
+  static const KeyboardShortcutData keyboard_shortcuts[] = {
+    {true,  true,  false, 30  /* ] */,       IDC_SELECT_NEXT_TAB},
+    {false, false, true,  121 /* pg down */, IDC_SELECT_NEXT_TAB},
+    {true,  true,  false, 33  /* [ */,       IDC_SELECT_PREVIOUS_TAB},
+    {false, false, true,  116 /* pg_up */,   IDC_SELECT_PREVIOUS_TAB},
+  };
+  
+  *num_entries = arraysize(keyboard_shortcuts);
+  
+  return keyboard_shortcuts;
+}
+
+int CommandForKeyboardShortcut(bool command_key, bool shift_key, bool cntrl_key,
+    int vkey_code) {
+
+  // Scan through keycodes and see if it corresponds to one of the global
+  // shortcuts on file.
+  //
+  // TODO(jeremy): Change this into a hash table once we get enough
+  // entries in the array to make a difference.
+  size_t num_shortcuts = 0;
+  const KeyboardShortcutData *it = GetKeyboardShortCutTable(&num_shortcuts);
+  for (size_t i = 0; i < num_shortcuts; ++i, ++it) {
+    if (it->command_key == command_key &&
+        it->shift_key == shift_key &&
+        it->cntrl_key == cntrl_key &&
+        it->vkey_code == vkey_code) {
+      return it->chrome_command;
+    }
+  }
+
+  return -1;
+}