// Copyright (c) 2015 The Chromium Embedded Framework 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 "cefclient/browser_window_osr_gtk.h"

#include <gdk/gdk.h>
#include <gdk/gdkkeysyms.h>
#include <gdk/gdkx.h>
#include <glib-object.h>
#include <gtk/gtk.h>
#include <gtk/gtkgl.h>
#include <GL/gl.h>

#define XK_3270  // for XK_3270_BackTab
#include <X11/keysym.h>
#include <X11/XF86keysym.h>
#include <X11/Xcursor/Xcursor.h>

#include "include/base/cef_logging.h"
#include "include/wrapper/cef_closure_task.h"
#include "cefclient/main_message_loop.h"

namespace client {

namespace {

int GetCefStateModifiers(guint state) {
  int modifiers = 0;
  if (state & GDK_SHIFT_MASK)
    modifiers |= EVENTFLAG_SHIFT_DOWN;
  if (state & GDK_LOCK_MASK)
    modifiers |= EVENTFLAG_CAPS_LOCK_ON;
  if (state & GDK_CONTROL_MASK)
    modifiers |= EVENTFLAG_CONTROL_DOWN;
  if (state & GDK_MOD1_MASK)
    modifiers |= EVENTFLAG_ALT_DOWN;
  if (state & GDK_BUTTON1_MASK)
    modifiers |= EVENTFLAG_LEFT_MOUSE_BUTTON;
  if (state & GDK_BUTTON2_MASK)
    modifiers |= EVENTFLAG_MIDDLE_MOUSE_BUTTON;
  if (state & GDK_BUTTON3_MASK)
    modifiers |= EVENTFLAG_RIGHT_MOUSE_BUTTON;
  return modifiers;
}

// From ui/events/keycodes/keyboard_codes_posix.h.
enum KeyboardCode {
  VKEY_BACK = 0x08,
  VKEY_TAB = 0x09,
  VKEY_BACKTAB = 0x0A,
  VKEY_CLEAR = 0x0C,
  VKEY_RETURN = 0x0D,
  VKEY_SHIFT = 0x10,
  VKEY_CONTROL = 0x11,
  VKEY_MENU = 0x12,
  VKEY_PAUSE = 0x13,
  VKEY_CAPITAL = 0x14,
  VKEY_KANA = 0x15,
  VKEY_HANGUL = 0x15,
  VKEY_JUNJA = 0x17,
  VKEY_FINAL = 0x18,
  VKEY_HANJA = 0x19,
  VKEY_KANJI = 0x19,
  VKEY_ESCAPE = 0x1B,
  VKEY_CONVERT = 0x1C,
  VKEY_NONCONVERT = 0x1D,
  VKEY_ACCEPT = 0x1E,
  VKEY_MODECHANGE = 0x1F,
  VKEY_SPACE = 0x20,
  VKEY_PRIOR = 0x21,
  VKEY_NEXT = 0x22,
  VKEY_END = 0x23,
  VKEY_HOME = 0x24,
  VKEY_LEFT = 0x25,
  VKEY_UP = 0x26,
  VKEY_RIGHT = 0x27,
  VKEY_DOWN = 0x28,
  VKEY_SELECT = 0x29,
  VKEY_PRINT = 0x2A,
  VKEY_EXECUTE = 0x2B,
  VKEY_SNAPSHOT = 0x2C,
  VKEY_INSERT = 0x2D,
  VKEY_DELETE = 0x2E,
  VKEY_HELP = 0x2F,
  VKEY_0 = 0x30,
  VKEY_1 = 0x31,
  VKEY_2 = 0x32,
  VKEY_3 = 0x33,
  VKEY_4 = 0x34,
  VKEY_5 = 0x35,
  VKEY_6 = 0x36,
  VKEY_7 = 0x37,
  VKEY_8 = 0x38,
  VKEY_9 = 0x39,
  VKEY_A = 0x41,
  VKEY_B = 0x42,
  VKEY_C = 0x43,
  VKEY_D = 0x44,
  VKEY_E = 0x45,
  VKEY_F = 0x46,
  VKEY_G = 0x47,
  VKEY_H = 0x48,
  VKEY_I = 0x49,
  VKEY_J = 0x4A,
  VKEY_K = 0x4B,
  VKEY_L = 0x4C,
  VKEY_M = 0x4D,
  VKEY_N = 0x4E,
  VKEY_O = 0x4F,
  VKEY_P = 0x50,
  VKEY_Q = 0x51,
  VKEY_R = 0x52,
  VKEY_S = 0x53,
  VKEY_T = 0x54,
  VKEY_U = 0x55,
  VKEY_V = 0x56,
  VKEY_W = 0x57,
  VKEY_X = 0x58,
  VKEY_Y = 0x59,
  VKEY_Z = 0x5A,
  VKEY_LWIN = 0x5B,
  VKEY_COMMAND = VKEY_LWIN,  // Provide the Mac name for convenience.
  VKEY_RWIN = 0x5C,
  VKEY_APPS = 0x5D,
  VKEY_SLEEP = 0x5F,
  VKEY_NUMPAD0 = 0x60,
  VKEY_NUMPAD1 = 0x61,
  VKEY_NUMPAD2 = 0x62,
  VKEY_NUMPAD3 = 0x63,
  VKEY_NUMPAD4 = 0x64,
  VKEY_NUMPAD5 = 0x65,
  VKEY_NUMPAD6 = 0x66,
  VKEY_NUMPAD7 = 0x67,
  VKEY_NUMPAD8 = 0x68,
  VKEY_NUMPAD9 = 0x69,
  VKEY_MULTIPLY = 0x6A,
  VKEY_ADD = 0x6B,
  VKEY_SEPARATOR = 0x6C,
  VKEY_SUBTRACT = 0x6D,
  VKEY_DECIMAL = 0x6E,
  VKEY_DIVIDE = 0x6F,
  VKEY_F1 = 0x70,
  VKEY_F2 = 0x71,
  VKEY_F3 = 0x72,
  VKEY_F4 = 0x73,
  VKEY_F5 = 0x74,
  VKEY_F6 = 0x75,
  VKEY_F7 = 0x76,
  VKEY_F8 = 0x77,
  VKEY_F9 = 0x78,
  VKEY_F10 = 0x79,
  VKEY_F11 = 0x7A,
  VKEY_F12 = 0x7B,
  VKEY_F13 = 0x7C,
  VKEY_F14 = 0x7D,
  VKEY_F15 = 0x7E,
  VKEY_F16 = 0x7F,
  VKEY_F17 = 0x80,
  VKEY_F18 = 0x81,
  VKEY_F19 = 0x82,
  VKEY_F20 = 0x83,
  VKEY_F21 = 0x84,
  VKEY_F22 = 0x85,
  VKEY_F23 = 0x86,
  VKEY_F24 = 0x87,
  VKEY_NUMLOCK = 0x90,
  VKEY_SCROLL = 0x91,
  VKEY_LSHIFT = 0xA0,
  VKEY_RSHIFT = 0xA1,
  VKEY_LCONTROL = 0xA2,
  VKEY_RCONTROL = 0xA3,
  VKEY_LMENU = 0xA4,
  VKEY_RMENU = 0xA5,
  VKEY_BROWSER_BACK = 0xA6,
  VKEY_BROWSER_FORWARD = 0xA7,
  VKEY_BROWSER_REFRESH = 0xA8,
  VKEY_BROWSER_STOP = 0xA9,
  VKEY_BROWSER_SEARCH = 0xAA,
  VKEY_BROWSER_FAVORITES = 0xAB,
  VKEY_BROWSER_HOME = 0xAC,
  VKEY_VOLUME_MUTE = 0xAD,
  VKEY_VOLUME_DOWN = 0xAE,
  VKEY_VOLUME_UP = 0xAF,
  VKEY_MEDIA_NEXT_TRACK = 0xB0,
  VKEY_MEDIA_PREV_TRACK = 0xB1,
  VKEY_MEDIA_STOP = 0xB2,
  VKEY_MEDIA_PLAY_PAUSE = 0xB3,
  VKEY_MEDIA_LAUNCH_MAIL = 0xB4,
  VKEY_MEDIA_LAUNCH_MEDIA_SELECT = 0xB5,
  VKEY_MEDIA_LAUNCH_APP1 = 0xB6,
  VKEY_MEDIA_LAUNCH_APP2 = 0xB7,
  VKEY_OEM_1 = 0xBA,
  VKEY_OEM_PLUS = 0xBB,
  VKEY_OEM_COMMA = 0xBC,
  VKEY_OEM_MINUS = 0xBD,
  VKEY_OEM_PERIOD = 0xBE,
  VKEY_OEM_2 = 0xBF,
  VKEY_OEM_3 = 0xC0,
  VKEY_OEM_4 = 0xDB,
  VKEY_OEM_5 = 0xDC,
  VKEY_OEM_6 = 0xDD,
  VKEY_OEM_7 = 0xDE,
  VKEY_OEM_8 = 0xDF,
  VKEY_OEM_102 = 0xE2,
  VKEY_OEM_103 = 0xE3,  // GTV KEYCODE_MEDIA_REWIND
  VKEY_OEM_104 = 0xE4,  // GTV KEYCODE_MEDIA_FAST_FORWARD
  VKEY_PROCESSKEY = 0xE5,
  VKEY_PACKET = 0xE7,
  VKEY_DBE_SBCSCHAR = 0xF3,
  VKEY_DBE_DBCSCHAR = 0xF4,
  VKEY_ATTN = 0xF6,
  VKEY_CRSEL = 0xF7,
  VKEY_EXSEL = 0xF8,
  VKEY_EREOF = 0xF9,
  VKEY_PLAY = 0xFA,
  VKEY_ZOOM = 0xFB,
  VKEY_NONAME = 0xFC,
  VKEY_PA1 = 0xFD,
  VKEY_OEM_CLEAR = 0xFE,
  VKEY_UNKNOWN = 0,

  // POSIX specific VKEYs. Note that as of Windows SDK 7.1, 0x97-9F, 0xD8-DA,
  // and 0xE8 are unassigned.
  VKEY_WLAN = 0x97,
  VKEY_POWER = 0x98,
  VKEY_BRIGHTNESS_DOWN = 0xD8,
  VKEY_BRIGHTNESS_UP = 0xD9,
  VKEY_KBD_BRIGHTNESS_DOWN = 0xDA,
  VKEY_KBD_BRIGHTNESS_UP = 0xE8,

  // Windows does not have a specific key code for AltGr. We use the unused 0xE1
  // (VK_OEM_AX) code to represent AltGr, matching the behaviour of Firefox on
  // Linux.
  VKEY_ALTGR = 0xE1,
  // Windows does not have a specific key code for Compose. We use the unused
  // 0xE6 (VK_ICO_CLEAR) code to represent Compose.
  VKEY_COMPOSE = 0xE6,
};

// From ui/events/keycodes/keyboard_code_conversion_x.cc.
// Gdk key codes (e.g. GDK_BackSpace) and X keysyms (e.g. XK_BackSpace) share
// the same values.
KeyboardCode KeyboardCodeFromXKeysym(unsigned int keysym) {
  switch (keysym) {
    case XK_BackSpace:
      return VKEY_BACK;
    case XK_Delete:
    case XK_KP_Delete:
      return VKEY_DELETE;
    case XK_Tab:
    case XK_KP_Tab:
    case XK_ISO_Left_Tab:
    case XK_3270_BackTab:
      return VKEY_TAB;
    case XK_Linefeed:
    case XK_Return:
    case XK_KP_Enter:
    case XK_ISO_Enter:
      return VKEY_RETURN;
    case XK_Clear:
    case XK_KP_Begin:  // NumPad 5 without Num Lock, for crosbug.com/29169.
      return VKEY_CLEAR;
    case XK_KP_Space:
    case XK_space:
      return VKEY_SPACE;
    case XK_Home:
    case XK_KP_Home:
      return VKEY_HOME;
    case XK_End:
    case XK_KP_End:
      return VKEY_END;
    case XK_Page_Up:
    case XK_KP_Page_Up:  // aka XK_KP_Prior
      return VKEY_PRIOR;
    case XK_Page_Down:
    case XK_KP_Page_Down:  // aka XK_KP_Next
      return VKEY_NEXT;
    case XK_Left:
    case XK_KP_Left:
      return VKEY_LEFT;
    case XK_Right:
    case XK_KP_Right:
      return VKEY_RIGHT;
    case XK_Down:
    case XK_KP_Down:
      return VKEY_DOWN;
    case XK_Up:
    case XK_KP_Up:
      return VKEY_UP;
    case XK_Escape:
      return VKEY_ESCAPE;
    case XK_Kana_Lock:
    case XK_Kana_Shift:
      return VKEY_KANA;
    case XK_Hangul:
      return VKEY_HANGUL;
    case XK_Hangul_Hanja:
      return VKEY_HANJA;
    case XK_Kanji:
      return VKEY_KANJI;
    case XK_Henkan:
      return VKEY_CONVERT;
    case XK_Muhenkan:
      return VKEY_NONCONVERT;
    case XK_Zenkaku_Hankaku:
      return VKEY_DBE_DBCSCHAR;
    case XK_A:
    case XK_a:
      return VKEY_A;
    case XK_B:
    case XK_b:
      return VKEY_B;
    case XK_C:
    case XK_c:
      return VKEY_C;
    case XK_D:
    case XK_d:
      return VKEY_D;
    case XK_E:
    case XK_e:
      return VKEY_E;
    case XK_F:
    case XK_f:
      return VKEY_F;
    case XK_G:
    case XK_g:
      return VKEY_G;
    case XK_H:
    case XK_h:
      return VKEY_H;
    case XK_I:
    case XK_i:
      return VKEY_I;
    case XK_J:
    case XK_j:
      return VKEY_J;
    case XK_K:
    case XK_k:
      return VKEY_K;
    case XK_L:
    case XK_l:
      return VKEY_L;
    case XK_M:
    case XK_m:
      return VKEY_M;
    case XK_N:
    case XK_n:
      return VKEY_N;
    case XK_O:
    case XK_o:
      return VKEY_O;
    case XK_P:
    case XK_p:
      return VKEY_P;
    case XK_Q:
    case XK_q:
      return VKEY_Q;
    case XK_R:
    case XK_r:
      return VKEY_R;
    case XK_S:
    case XK_s:
      return VKEY_S;
    case XK_T:
    case XK_t:
      return VKEY_T;
    case XK_U:
    case XK_u:
      return VKEY_U;
    case XK_V:
    case XK_v:
      return VKEY_V;
    case XK_W:
    case XK_w:
      return VKEY_W;
    case XK_X:
    case XK_x:
      return VKEY_X;
    case XK_Y:
    case XK_y:
      return VKEY_Y;
    case XK_Z:
    case XK_z:
      return VKEY_Z;

    case XK_0:
    case XK_1:
    case XK_2:
    case XK_3:
    case XK_4:
    case XK_5:
    case XK_6:
    case XK_7:
    case XK_8:
    case XK_9:
      return static_cast<KeyboardCode>(VKEY_0 + (keysym - XK_0));

    case XK_parenright:
      return VKEY_0;
    case XK_exclam:
      return VKEY_1;
    case XK_at:
      return VKEY_2;
    case XK_numbersign:
      return VKEY_3;
    case XK_dollar:
      return VKEY_4;
    case XK_percent:
      return VKEY_5;
    case XK_asciicircum:
      return VKEY_6;
    case XK_ampersand:
      return VKEY_7;
    case XK_asterisk:
      return VKEY_8;
    case XK_parenleft:
      return VKEY_9;

    case XK_KP_0:
    case XK_KP_1:
    case XK_KP_2:
    case XK_KP_3:
    case XK_KP_4:
    case XK_KP_5:
    case XK_KP_6:
    case XK_KP_7:
    case XK_KP_8:
    case XK_KP_9:
      return static_cast<KeyboardCode>(VKEY_NUMPAD0 + (keysym - XK_KP_0));

    case XK_multiply:
    case XK_KP_Multiply:
      return VKEY_MULTIPLY;
    case XK_KP_Add:
      return VKEY_ADD;
    case XK_KP_Separator:
      return VKEY_SEPARATOR;
    case XK_KP_Subtract:
      return VKEY_SUBTRACT;
    case XK_KP_Decimal:
      return VKEY_DECIMAL;
    case XK_KP_Divide:
      return VKEY_DIVIDE;
    case XK_KP_Equal:
    case XK_equal:
    case XK_plus:
      return VKEY_OEM_PLUS;
    case XK_comma:
    case XK_less:
      return VKEY_OEM_COMMA;
    case XK_minus:
    case XK_underscore:
      return VKEY_OEM_MINUS;
    case XK_greater:
    case XK_period:
      return VKEY_OEM_PERIOD;
    case XK_colon:
    case XK_semicolon:
      return VKEY_OEM_1;
    case XK_question:
    case XK_slash:
      return VKEY_OEM_2;
    case XK_asciitilde:
    case XK_quoteleft:
      return VKEY_OEM_3;
    case XK_bracketleft:
    case XK_braceleft:
      return VKEY_OEM_4;
    case XK_backslash:
    case XK_bar:
      return VKEY_OEM_5;
    case XK_bracketright:
    case XK_braceright:
      return VKEY_OEM_6;
    case XK_quoteright:
    case XK_quotedbl:
      return VKEY_OEM_7;
    case XK_ISO_Level5_Shift:
      return VKEY_OEM_8;
    case XK_Shift_L:
    case XK_Shift_R:
      return VKEY_SHIFT;
    case XK_Control_L:
    case XK_Control_R:
      return VKEY_CONTROL;
    case XK_Meta_L:
    case XK_Meta_R:
    case XK_Alt_L:
    case XK_Alt_R:
      return VKEY_MENU;
    case XK_ISO_Level3_Shift:
      return VKEY_ALTGR;
    case XK_Multi_key:
      return VKEY_COMPOSE;
    case XK_Pause:
      return VKEY_PAUSE;
    case XK_Caps_Lock:
      return VKEY_CAPITAL;
    case XK_Num_Lock:
      return VKEY_NUMLOCK;
    case XK_Scroll_Lock:
      return VKEY_SCROLL;
    case XK_Select:
      return VKEY_SELECT;
    case XK_Print:
      return VKEY_PRINT;
    case XK_Execute:
      return VKEY_EXECUTE;
    case XK_Insert:
    case XK_KP_Insert:
      return VKEY_INSERT;
    case XK_Help:
      return VKEY_HELP;
    case XK_Super_L:
      return VKEY_LWIN;
    case XK_Super_R:
      return VKEY_RWIN;
    case XK_Menu:
      return VKEY_APPS;
    case XK_F1:
    case XK_F2:
    case XK_F3:
    case XK_F4:
    case XK_F5:
    case XK_F6:
    case XK_F7:
    case XK_F8:
    case XK_F9:
    case XK_F10:
    case XK_F11:
    case XK_F12:
    case XK_F13:
    case XK_F14:
    case XK_F15:
    case XK_F16:
    case XK_F17:
    case XK_F18:
    case XK_F19:
    case XK_F20:
    case XK_F21:
    case XK_F22:
    case XK_F23:
    case XK_F24:
      return static_cast<KeyboardCode>(VKEY_F1 + (keysym - XK_F1));
    case XK_KP_F1:
    case XK_KP_F2:
    case XK_KP_F3:
    case XK_KP_F4:
      return static_cast<KeyboardCode>(VKEY_F1 + (keysym - XK_KP_F1));

    case XK_guillemotleft:
    case XK_guillemotright:
    case XK_degree:
    // In the case of canadian multilingual keyboard layout, VKEY_OEM_102 is
    // assigned to ugrave key.
    case XK_ugrave:
    case XK_Ugrave:
    case XK_brokenbar:
      return VKEY_OEM_102;  // international backslash key in 102 keyboard.

    // When evdev is in use, /usr/share/X11/xkb/symbols/inet maps F13-18 keys
    // to the special XF86XK symbols to support Microsoft Ergonomic keyboards:
    // https://bugs.freedesktop.org/show_bug.cgi?id=5783
    // In Chrome, we map these X key symbols back to F13-18 since we don't have
    // VKEYs for these XF86XK symbols.
    case XF86XK_Tools:
      return VKEY_F13;
    case XF86XK_Launch5:
      return VKEY_F14;
    case XF86XK_Launch6:
      return VKEY_F15;
    case XF86XK_Launch7:
      return VKEY_F16;
    case XF86XK_Launch8:
      return VKEY_F17;
    case XF86XK_Launch9:
      return VKEY_F18;
    case XF86XK_Refresh:
    case XF86XK_History:
    case XF86XK_OpenURL:
    case XF86XK_AddFavorite:
    case XF86XK_Go:
    case XF86XK_ZoomIn:
    case XF86XK_ZoomOut:
      // ui::AcceleratorGtk tries to convert the XF86XK_ keysyms on Chrome
      // startup. It's safe to return VKEY_UNKNOWN here since ui::AcceleratorGtk
      // also checks a Gdk keysym. http://crbug.com/109843
      return VKEY_UNKNOWN;
    // For supporting multimedia buttons on a USB keyboard.
    case XF86XK_Back:
      return VKEY_BROWSER_BACK;
    case XF86XK_Forward:
      return VKEY_BROWSER_FORWARD;
    case XF86XK_Reload:
      return VKEY_BROWSER_REFRESH;
    case XF86XK_Stop:
      return VKEY_BROWSER_STOP;
    case XF86XK_Search:
      return VKEY_BROWSER_SEARCH;
    case XF86XK_Favorites:
      return VKEY_BROWSER_FAVORITES;
    case XF86XK_HomePage:
      return VKEY_BROWSER_HOME;
    case XF86XK_AudioMute:
      return VKEY_VOLUME_MUTE;
    case XF86XK_AudioLowerVolume:
      return VKEY_VOLUME_DOWN;
    case XF86XK_AudioRaiseVolume:
      return VKEY_VOLUME_UP;
    case XF86XK_AudioNext:
      return VKEY_MEDIA_NEXT_TRACK;
    case XF86XK_AudioPrev:
      return VKEY_MEDIA_PREV_TRACK;
    case XF86XK_AudioStop:
      return VKEY_MEDIA_STOP;
    case XF86XK_AudioPlay:
      return VKEY_MEDIA_PLAY_PAUSE;
    case XF86XK_Mail:
      return VKEY_MEDIA_LAUNCH_MAIL;
    case XF86XK_LaunchA:  // F3 on an Apple keyboard.
      return VKEY_MEDIA_LAUNCH_APP1;
    case XF86XK_LaunchB:  // F4 on an Apple keyboard.
    case XF86XK_Calculator:
      return VKEY_MEDIA_LAUNCH_APP2;
    case XF86XK_WLAN:
      return VKEY_WLAN;
    case XF86XK_PowerOff:
      return VKEY_POWER;
    case XF86XK_MonBrightnessDown:
      return VKEY_BRIGHTNESS_DOWN;
    case XF86XK_MonBrightnessUp:
      return VKEY_BRIGHTNESS_UP;
    case XF86XK_KbdBrightnessDown:
      return VKEY_KBD_BRIGHTNESS_DOWN;
    case XF86XK_KbdBrightnessUp:
      return VKEY_KBD_BRIGHTNESS_UP;

    // TODO(sad): some keycodes are still missing.
  }
  return VKEY_UNKNOWN;
}

// From content/browser/renderer_host/input/web_input_event_util_posix.cc.
KeyboardCode GdkEventToWindowsKeyCode(const GdkEventKey* event) {
  static const unsigned int kHardwareCodeToGDKKeyval[] = {
    0,                 // 0x00:
    0,                 // 0x01:
    0,                 // 0x02:
    0,                 // 0x03:
    0,                 // 0x04:
    0,                 // 0x05:
    0,                 // 0x06:
    0,                 // 0x07:
    0,                 // 0x08:
    0,                 // 0x09: GDK_Escape
    GDK_1,             // 0x0A: GDK_1
    GDK_2,             // 0x0B: GDK_2
    GDK_3,             // 0x0C: GDK_3
    GDK_4,             // 0x0D: GDK_4
    GDK_5,             // 0x0E: GDK_5
    GDK_6,             // 0x0F: GDK_6
    GDK_7,             // 0x10: GDK_7
    GDK_8,             // 0x11: GDK_8
    GDK_9,             // 0x12: GDK_9
    GDK_0,             // 0x13: GDK_0
    GDK_minus,         // 0x14: GDK_minus
    GDK_equal,         // 0x15: GDK_equal
    0,                 // 0x16: GDK_BackSpace
    0,                 // 0x17: GDK_Tab
    GDK_q,             // 0x18: GDK_q
    GDK_w,             // 0x19: GDK_w
    GDK_e,             // 0x1A: GDK_e
    GDK_r,             // 0x1B: GDK_r
    GDK_t,             // 0x1C: GDK_t
    GDK_y,             // 0x1D: GDK_y
    GDK_u,             // 0x1E: GDK_u
    GDK_i,             // 0x1F: GDK_i
    GDK_o,             // 0x20: GDK_o
    GDK_p,             // 0x21: GDK_p
    GDK_bracketleft,   // 0x22: GDK_bracketleft
    GDK_bracketright,  // 0x23: GDK_bracketright
    0,                 // 0x24: GDK_Return
    0,                 // 0x25: GDK_Control_L
    GDK_a,             // 0x26: GDK_a
    GDK_s,             // 0x27: GDK_s
    GDK_d,             // 0x28: GDK_d
    GDK_f,             // 0x29: GDK_f
    GDK_g,             // 0x2A: GDK_g
    GDK_h,             // 0x2B: GDK_h
    GDK_j,             // 0x2C: GDK_j
    GDK_k,             // 0x2D: GDK_k
    GDK_l,             // 0x2E: GDK_l
    GDK_semicolon,     // 0x2F: GDK_semicolon
    GDK_apostrophe,    // 0x30: GDK_apostrophe
    GDK_grave,         // 0x31: GDK_grave
    0,                 // 0x32: GDK_Shift_L
    GDK_backslash,     // 0x33: GDK_backslash
    GDK_z,             // 0x34: GDK_z
    GDK_x,             // 0x35: GDK_x
    GDK_c,             // 0x36: GDK_c
    GDK_v,             // 0x37: GDK_v
    GDK_b,             // 0x38: GDK_b
    GDK_n,             // 0x39: GDK_n
    GDK_m,             // 0x3A: GDK_m
    GDK_comma,         // 0x3B: GDK_comma
    GDK_period,        // 0x3C: GDK_period
    GDK_slash,         // 0x3D: GDK_slash
    0,                 // 0x3E: GDK_Shift_R
    0,                 // 0x3F:
    0,                 // 0x40:
    0,                 // 0x41:
    0,                 // 0x42:
    0,                 // 0x43:
    0,                 // 0x44:
    0,                 // 0x45:
    0,                 // 0x46:
    0,                 // 0x47:
    0,                 // 0x48:
    0,                 // 0x49:
    0,                 // 0x4A:
    0,                 // 0x4B:
    0,                 // 0x4C:
    0,                 // 0x4D:
    0,                 // 0x4E:
    0,                 // 0x4F:
    0,                 // 0x50:
    0,                 // 0x51:
    0,                 // 0x52:
    0,                 // 0x53:
    0,                 // 0x54:
    0,                 // 0x55:
    0,                 // 0x56:
    0,                 // 0x57:
    0,                 // 0x58:
    0,                 // 0x59:
    0,                 // 0x5A:
    0,                 // 0x5B:
    0,                 // 0x5C:
    0,                 // 0x5D:
    0,                 // 0x5E:
    0,                 // 0x5F:
    0,                 // 0x60:
    0,                 // 0x61:
    0,                 // 0x62:
    0,                 // 0x63:
    0,                 // 0x64:
    0,                 // 0x65:
    0,                 // 0x66:
    0,                 // 0x67:
    0,                 // 0x68:
    0,                 // 0x69:
    0,                 // 0x6A:
    0,                 // 0x6B:
    0,                 // 0x6C:
    0,                 // 0x6D:
    0,                 // 0x6E:
    0,                 // 0x6F:
    0,                 // 0x70:
    0,                 // 0x71:
    0,                 // 0x72:
    GDK_Super_L,       // 0x73: GDK_Super_L
    GDK_Super_R,       // 0x74: GDK_Super_R
  };

  // |windows_key_code| has to include a valid virtual-key code even when we
  // use non-US layouts, e.g. even when we type an 'A' key of a US keyboard
  // on the Hebrew layout, |windows_key_code| should be VK_A.
  // On the other hand, |event->keyval| value depends on the current
  // GdkKeymap object, i.e. when we type an 'A' key of a US keyboard on
  // the Hebrew layout, |event->keyval| becomes GDK_hebrew_shin and this
  // KeyboardCodeFromXKeysym() call returns 0.
  // To improve compatibilty with Windows, we use |event->hardware_keycode|
  // for retrieving its Windows key-code for the keys when the
  // WebCore::windows_key_codeForEvent() call returns 0.
  // We shouldn't use |event->hardware_keycode| for keys that GdkKeymap
  // objects cannot change because |event->hardware_keycode| doesn't change
  // even when we change the layout options, e.g. when we swap a control
  // key and a caps-lock key, GTK doesn't swap their
  // |event->hardware_keycode| values but swap their |event->keyval| values.
  KeyboardCode windows_key_code =
      KeyboardCodeFromXKeysym(event->keyval);
  if (windows_key_code)
    return windows_key_code;

  if (event->hardware_keycode < arraysize(kHardwareCodeToGDKKeyval)) {
    int keyval = kHardwareCodeToGDKKeyval[event->hardware_keycode];
    if (keyval)
      return KeyboardCodeFromXKeysym(keyval);
  }

  // This key is one that keyboard-layout drivers cannot change.
  // Use |event->keyval| to retrieve its |windows_key_code| value.
  return KeyboardCodeFromXKeysym(event->keyval);
}

// From content/browser/renderer_host/input/web_input_event_util_posix.cc.
KeyboardCode GetWindowsKeyCodeWithoutLocation(KeyboardCode key_code) {
  switch (key_code) {
    case VKEY_LCONTROL:
    case VKEY_RCONTROL:
      return VKEY_CONTROL;
    case VKEY_LSHIFT:
    case VKEY_RSHIFT:
    return VKEY_SHIFT;
    case VKEY_LMENU:
    case VKEY_RMENU:
      return VKEY_MENU;
    default:
      return key_code;
  }
}

// From content/browser/renderer_host/input/web_input_event_builders_gtk.cc.
// Gets the corresponding control character of a specified key code. See:
// http://en.wikipedia.org/wiki/Control_characters
// We emulate Windows behavior here.
int GetControlCharacter(KeyboardCode windows_key_code, bool shift) {
  if (windows_key_code >= VKEY_A && windows_key_code <= VKEY_Z) {
    // ctrl-A ~ ctrl-Z map to \x01 ~ \x1A
    return windows_key_code - VKEY_A + 1;
  }
  if (shift) {
    // following graphics chars require shift key to input.
    switch (windows_key_code) {
      // ctrl-@ maps to \x00 (Null byte)
      case VKEY_2:
        return 0;
      // ctrl-^ maps to \x1E (Record separator, Information separator two)
      case VKEY_6:
        return 0x1E;
      // ctrl-_ maps to \x1F (Unit separator, Information separator one)
      case VKEY_OEM_MINUS:
        return 0x1F;
      // Returns 0 for all other keys to avoid inputting unexpected chars.
      default:
        return 0;
    }
  } else {
    switch (windows_key_code) {
      // ctrl-[ maps to \x1B (Escape)
      case VKEY_OEM_4:
        return 0x1B;
      // ctrl-\ maps to \x1C (File separator, Information separator four)
      case VKEY_OEM_5:
        return 0x1C;
      // ctrl-] maps to \x1D (Group separator, Information separator three)
      case VKEY_OEM_6:
        return 0x1D;
      // ctrl-Enter maps to \x0A (Line feed)
      case VKEY_RETURN:
        return 0x0A;
      // Returns 0 for all other keys to avoid inputting unexpected chars.
      default:
        return 0;
    }
  }
}

void GetWidgetRectInScreen(GtkWidget* widget, GdkRectangle* r) {
  gint x, y, w, h;
  GdkRectangle extents;

  GdkWindow* window = gtk_widget_get_parent_window(widget);

  // Get parent's left-top screen coordinates.
  gdk_window_get_root_origin(window, &x, &y);
  // Get parent's width and height.
  gdk_drawable_get_size(window, &w, &h);
  // Get parent's extents including decorations.
  gdk_window_get_frame_extents(window, &extents);

  // X and Y calculations assume that left, right and bottom border sizes are
  // all the same.
  const gint border = (extents.width - w) / 2;
  r->x = x + border + widget->allocation.x;
  r->y = y + (extents.height - h) - border + widget->allocation.y;
  r->width = widget->allocation.width;
  r->height = widget->allocation.height;
}

class ScopedGLContext {
 public:
  ScopedGLContext(GtkWidget* widget, bool swap_buffers)
      : swap_buffers_(swap_buffers) {
    GdkGLContext* glcontext = gtk_widget_get_gl_context(widget);
    gldrawable_ = gtk_widget_get_gl_drawable(widget);
    is_valid_ = gdk_gl_drawable_gl_begin(gldrawable_, glcontext);
  }

  virtual ~ScopedGLContext() {
    if (is_valid_) {
      gdk_gl_drawable_gl_end(gldrawable_);

      if(swap_buffers_) {
        if (gdk_gl_drawable_is_double_buffered(gldrawable_))
          gdk_gl_drawable_swap_buffers(gldrawable_);
        else
          glFlush();
      }
    }
  }

  bool IsValid() const { return is_valid_; }

 private:
  bool swap_buffers_;
  GdkGLDrawable* gldrawable_;
  bool is_valid_;
};

}  // namespace

BrowserWindowOsrGtk::BrowserWindowOsrGtk(BrowserWindow::Delegate* delegate,
                                         const std::string& startup_url,
                                         bool transparent,
                                         bool show_update_rect)
    : BrowserWindow(delegate),
      renderer_(transparent, show_update_rect),
      glarea_(NULL),
      hidden_(false),
      gl_enabled_(false),
      painting_popup_(false) {
  client_handler_ = new ClientHandlerOsr(this, this, startup_url);
}

void BrowserWindowOsrGtk::CreateBrowser(ClientWindowHandle parent_handle,
                                        const CefRect& rect,
                                        const CefBrowserSettings& settings) {
  REQUIRE_MAIN_THREAD();

  // Create the native window.
  Create(parent_handle);

  // Retrieve the X11 Window ID for the GTK parent window.
  GtkWidget* window = gtk_widget_get_ancestor(
      GTK_WIDGET(parent_handle), GTK_TYPE_WINDOW);
  ::Window xwindow = GDK_WINDOW_XID(gtk_widget_get_window(window));
  DCHECK(xwindow);

  CefWindowInfo window_info;
  window_info.SetAsWindowless(xwindow, renderer_.IsTransparent());

  // Create the browser asynchronously.
  CefBrowserHost::CreateBrowser(window_info, client_handler_,
                                client_handler_->startup_url(),
                                settings, NULL);
}

void BrowserWindowOsrGtk::GetPopupConfig(CefWindowHandle temp_handle,
                                         CefWindowInfo& windowInfo,
                                         CefRefPtr<CefClient>& client,
                                         CefBrowserSettings& settings) {
  // Note: This method may be called on any thread.
  windowInfo.SetAsWindowless(temp_handle, renderer_.IsTransparent());
  client = client_handler_;
}

void BrowserWindowOsrGtk::ShowPopup(ClientWindowHandle parent_handle,
                                    int x, int y, size_t width, size_t height) {
  REQUIRE_MAIN_THREAD();
  DCHECK(browser_.get());

  // Create the native window.
  Create(parent_handle);

  // Send resize notification so the compositor is assigned the correct
  // viewport size and begins rendering.
  browser_->GetHost()->WasResized();

  Show();
}

void BrowserWindowOsrGtk::Show() {
  REQUIRE_MAIN_THREAD();

  if (hidden_) {
    // Set the browser as visible.
    browser_->GetHost()->WasHidden(false);
    hidden_ = false;
  }

  // Give focus to the browser.
  browser_->GetHost()->SendFocusEvent(true);
}

void BrowserWindowOsrGtk::Hide() {
  REQUIRE_MAIN_THREAD();
  
  if (!browser_)
    return;

  // Remove focus from the browser.
  browser_->GetHost()->SendFocusEvent(false);

  if (!hidden_) {
    // Set the browser as hidden.
    browser_->GetHost()->WasHidden(true);
    hidden_ = true;
  }
}

void BrowserWindowOsrGtk::SetBounds(int x, int y, size_t width, size_t height) {
  REQUIRE_MAIN_THREAD();
  // Nothing to do here. GTK will take care of positioning in the container.
}

void BrowserWindowOsrGtk::SetFocus(bool focus) {
  REQUIRE_MAIN_THREAD();
  if (glarea_ && focus)
    gtk_widget_grab_focus(glarea_);
}

ClientWindowHandle BrowserWindowOsrGtk::GetWindowHandle() const {
  REQUIRE_MAIN_THREAD();
  return glarea_;
}

void BrowserWindowOsrGtk::OnAfterCreated(CefRefPtr<CefBrowser> browser) {
  CEF_REQUIRE_UI_THREAD();
}

void BrowserWindowOsrGtk::OnBeforeClose(CefRefPtr<CefBrowser> browser) {
  CEF_REQUIRE_UI_THREAD();
  REQUIRE_MAIN_THREAD();

  // Detach |this| from the ClientHandlerOsr.
  static_cast<ClientHandlerOsr*>(client_handler_.get())->DetachOsrDelegate();

  // Disconnect all signal handlers that reference |this|.
  g_signal_handlers_disconnect_matched(glarea_, G_SIGNAL_MATCH_DATA, 0, 0,
      NULL, NULL, this);

  DisableGL();
}

bool BrowserWindowOsrGtk::GetRootScreenRect(CefRefPtr<CefBrowser> browser,
                                            CefRect& rect) {
  CEF_REQUIRE_UI_THREAD();
  return false;
}

bool BrowserWindowOsrGtk::GetViewRect(CefRefPtr<CefBrowser> browser,
                                      CefRect& rect) {
  CEF_REQUIRE_UI_THREAD();
  REQUIRE_MAIN_THREAD();

  if (!glarea_)
    return false;

  // The simulated screen and view rectangle are the same. This is necessary
  // for popup menus to be located and sized inside the view.
  rect.x = rect.y = 0;
  rect.width = glarea_->allocation.width;
  rect.height = glarea_->allocation.height;
  return true;
}

bool BrowserWindowOsrGtk::GetScreenPoint(CefRefPtr<CefBrowser> browser,
                                         int viewX,
                                         int viewY,
                                         int& screenX,
                                         int& screenY) {
  CEF_REQUIRE_UI_THREAD();
  REQUIRE_MAIN_THREAD();

  GdkRectangle screen_rect;
  GetWidgetRectInScreen(glarea_, &screen_rect);
  screenX = screen_rect.x + viewX;
  screenY = screen_rect.y + viewY;
  return true;
}

bool BrowserWindowOsrGtk::GetScreenInfo(CefRefPtr<CefBrowser> browser,
                                        CefScreenInfo& screen_info) {
  CEF_REQUIRE_UI_THREAD();
  return false;
}

void BrowserWindowOsrGtk::OnPopupShow(CefRefPtr<CefBrowser> browser,
                                      bool show) {
  CEF_REQUIRE_UI_THREAD();
  REQUIRE_MAIN_THREAD();

  if (!show) {
    renderer_.ClearPopupRects();
    browser->GetHost()->Invalidate(PET_VIEW);
  }
  renderer_.OnPopupShow(browser, show);
}

void BrowserWindowOsrGtk::OnPopupSize(CefRefPtr<CefBrowser> browser,
                                      const CefRect& rect) {
  CEF_REQUIRE_UI_THREAD();
  REQUIRE_MAIN_THREAD();

  renderer_.OnPopupSize(browser, rect);
}

void BrowserWindowOsrGtk::OnPaint(
    CefRefPtr<CefBrowser> browser,
    CefRenderHandler::PaintElementType type,
    const CefRenderHandler::RectList& dirtyRects,
    const void* buffer,
    int width,
    int height) {
  CEF_REQUIRE_UI_THREAD();
  REQUIRE_MAIN_THREAD();

  if (width <= 2 && height <= 2) {
    // Ignore really small buffer sizes while the widget is starting up.
    return;
  }

  if (painting_popup_) {
    renderer_.OnPaint(browser, type, dirtyRects, buffer, width, height);
    return;
  }

  if (!gl_enabled_)
    EnableGL();

  ScopedGLContext scoped_gl_context(glarea_, true);
  if (!scoped_gl_context.IsValid())
    return;

  renderer_.OnPaint(browser, type, dirtyRects, buffer, width, height);
  if (type == PET_VIEW && !renderer_.popup_rect().IsEmpty()) {
    painting_popup_ = true;
    browser->GetHost()->Invalidate(PET_POPUP);
    painting_popup_ = false;
  }
  renderer_.Render();
}

void BrowserWindowOsrGtk::OnCursorChange(
    CefRefPtr<CefBrowser> browser,
    CefCursorHandle cursor,
    CefRenderHandler::CursorType type,
    const CefCursorInfo& custom_cursor_info) {
  CEF_REQUIRE_UI_THREAD();
  REQUIRE_MAIN_THREAD();

  // Retrieve the X11 display shared with Chromium.
  ::Display* xdisplay = cef_get_xdisplay();
  DCHECK(xdisplay);

  // Retrieve the X11 window handle for the GTK widget.
  ::Window xwindow = GDK_WINDOW_XID(gtk_widget_get_window(glarea_));

  // Set the cursor.
  XDefineCursor(xdisplay, xwindow, cursor);
}

bool BrowserWindowOsrGtk::StartDragging(
    CefRefPtr<CefBrowser> browser,
    CefRefPtr<CefDragData> drag_data,
    CefRenderHandler::DragOperationsMask allowed_ops,
    int x, int y) {
  CEF_REQUIRE_UI_THREAD();
  // TODO(port): Implement drag&drop support.
  return false;
}

void BrowserWindowOsrGtk::UpdateDragCursor(
    CefRefPtr<CefBrowser> browser,
    CefRenderHandler::DragOperation operation) {
  CEF_REQUIRE_UI_THREAD();
}

void BrowserWindowOsrGtk::Create(ClientWindowHandle parent_handle) {
  REQUIRE_MAIN_THREAD();
  DCHECK(!glarea_);

  glarea_ = gtk_drawing_area_new();
  DCHECK(glarea_);

  GdkGLConfig* glconfig = gdk_gl_config_new_by_mode(
      static_cast<GdkGLConfigMode>(GDK_GL_MODE_RGB |
                                   GDK_GL_MODE_DEPTH |
                                   GDK_GL_MODE_DOUBLE));
  DCHECK(glconfig);

  gtk_widget_set_gl_capability(glarea_, glconfig, NULL, TRUE, GDK_GL_RGBA_TYPE);

  gtk_widget_set_can_focus(glarea_, TRUE);

  g_signal_connect(G_OBJECT(glarea_), "size_allocate",
                   G_CALLBACK(&BrowserWindowOsrGtk::SizeAllocation), this);

  gtk_widget_set_events(glarea_,
                        GDK_BUTTON_PRESS_MASK |
                        GDK_BUTTON_RELEASE_MASK |
                        GDK_KEY_PRESS_MASK |
                        GDK_KEY_RELEASE_MASK |
                        GDK_ENTER_NOTIFY_MASK |
                        GDK_LEAVE_NOTIFY_MASK |
                        GDK_POINTER_MOTION_MASK |
                        GDK_POINTER_MOTION_HINT_MASK |
                        GDK_SCROLL_MASK |
                        GDK_FOCUS_CHANGE_MASK);
  g_signal_connect(G_OBJECT(glarea_), "button_press_event",
                   G_CALLBACK(&BrowserWindowOsrGtk::ClickEvent), this);
  g_signal_connect(G_OBJECT(glarea_), "button_release_event",
                   G_CALLBACK(&BrowserWindowOsrGtk::ClickEvent), this);
  g_signal_connect(G_OBJECT(glarea_), "key_press_event",
                   G_CALLBACK(&BrowserWindowOsrGtk::KeyEvent), this);
  g_signal_connect(G_OBJECT(glarea_), "key_release_event",
                   G_CALLBACK(&BrowserWindowOsrGtk::KeyEvent), this);
  g_signal_connect(G_OBJECT(glarea_), "enter_notify_event",
                   G_CALLBACK(&BrowserWindowOsrGtk::MoveEvent), this);
  g_signal_connect(G_OBJECT(glarea_), "leave_notify_event",
                   G_CALLBACK(&BrowserWindowOsrGtk::MoveEvent), this);
  g_signal_connect(G_OBJECT(glarea_), "motion_notify_event",
                   G_CALLBACK(&BrowserWindowOsrGtk::MoveEvent), this);
  g_signal_connect(G_OBJECT(glarea_), "scroll_event",
                   G_CALLBACK(&BrowserWindowOsrGtk::ScrollEvent), this);
  g_signal_connect(G_OBJECT(glarea_), "focus_in_event",
                   G_CALLBACK(&BrowserWindowOsrGtk::FocusEvent), this);
  g_signal_connect(G_OBJECT(glarea_), "focus_out_event",
                   G_CALLBACK(&BrowserWindowOsrGtk::FocusEvent), this);

  gtk_container_add(GTK_CONTAINER(parent_handle), glarea_);

  // Make the GlArea visible in the parent container.
  gtk_widget_show_all(parent_handle);
}

// static
gint BrowserWindowOsrGtk::SizeAllocation(GtkWidget* widget,
                                         GtkAllocation* allocation,
                                         BrowserWindowOsrGtk* self) {
  REQUIRE_MAIN_THREAD();

  if (self->browser_.get()) {
    // Results in a call to GetViewRect().
    self->browser_->GetHost()->WasResized();
  }
  return TRUE;
}

// static
gint BrowserWindowOsrGtk::ClickEvent(GtkWidget* widget,
                                     GdkEventButton* event,
                                     BrowserWindowOsrGtk* self) {
  REQUIRE_MAIN_THREAD();

  if (!self->browser_.get())
    return TRUE;

  CefRefPtr<CefBrowserHost> host = self->browser_->GetHost();

  CefBrowserHost::MouseButtonType button_type = MBT_LEFT;
  switch (event->button) {
    case 1:
      break;
    case 2:
      button_type = MBT_MIDDLE;
      break;
    case 3:
      button_type = MBT_RIGHT;
      break;
    default:
      // Other mouse buttons are not handled here.
      return FALSE;
  }

  CefMouseEvent mouse_event;
  mouse_event.x = event->x;
  mouse_event.y = event->y;
  self->ApplyPopupOffset(mouse_event.x, mouse_event.y);
  mouse_event.modifiers = GetCefStateModifiers(event->state);

  bool mouse_up = (event->type == GDK_BUTTON_RELEASE);
  if (!mouse_up)
    gtk_widget_grab_focus(widget);

  int click_count = 1;
  switch (event->type) {
    case GDK_2BUTTON_PRESS:
      click_count = 2;
      break;
    case GDK_3BUTTON_PRESS:
      click_count = 3;
      break;
    default:
      break;
  }

  host->SendMouseClickEvent(mouse_event, button_type, mouse_up, click_count);
  return TRUE;
}

// static
gint BrowserWindowOsrGtk::KeyEvent(GtkWidget* widget,
                                   GdkEventKey* event,
                                   BrowserWindowOsrGtk* self) {
  REQUIRE_MAIN_THREAD();

  if (!self->browser_.get())
    return TRUE;

  CefRefPtr<CefBrowserHost> host = self->browser_->GetHost();

  // Based on WebKeyboardEventBuilder::Build from
  // content/browser/renderer_host/input/web_input_event_builders_gtk.cc.
  CefKeyEvent key_event;
  KeyboardCode windows_key_code = GdkEventToWindowsKeyCode(event);
  key_event.windows_key_code =
      GetWindowsKeyCodeWithoutLocation(windows_key_code);
  key_event.native_key_code = event->hardware_keycode;

  key_event.modifiers = GetCefStateModifiers(event->state);
  if (event->keyval >= GDK_KP_Space && event->keyval <= GDK_KP_9)
    key_event.modifiers |= EVENTFLAG_IS_KEY_PAD;
  if (key_event.modifiers & EVENTFLAG_ALT_DOWN)
    key_event.is_system_key = true;

  if (windows_key_code == VKEY_RETURN) {
    // We need to treat the enter key as a key press of character \r.  This
    // is apparently just how webkit handles it and what it expects.
    key_event.unmodified_character = '\r';
  } else {
    // FIXME: fix for non BMP chars
    key_event.unmodified_character =
        static_cast<int>(gdk_keyval_to_unicode(event->keyval));
  }

  // If ctrl key is pressed down, then control character shall be input.
  if (key_event.modifiers & EVENTFLAG_CONTROL_DOWN) {
    key_event.character =
      GetControlCharacter(windows_key_code,
                          key_event.modifiers & EVENTFLAG_SHIFT_DOWN);
  } else {
    key_event.character = key_event.unmodified_character;
  }

  if (event->type == GDK_KEY_PRESS) {
    key_event.type = KEYEVENT_RAWKEYDOWN;
    host->SendKeyEvent(key_event);
  } else {
    // Need to send both KEYUP and CHAR events.
    key_event.type = KEYEVENT_KEYUP;
    host->SendKeyEvent(key_event);
    key_event.type = KEYEVENT_CHAR;
    host->SendKeyEvent(key_event);
  }

  return TRUE;
}

// static
gint BrowserWindowOsrGtk::MoveEvent(GtkWidget* widget,
                                    GdkEventMotion* event,
                                    BrowserWindowOsrGtk* self) {
  REQUIRE_MAIN_THREAD();

  if (!self->browser_.get())
    return TRUE;

  CefRefPtr<CefBrowserHost> host = self->browser_->GetHost();

  gint x, y;
  GdkModifierType state;

  if (event->is_hint) {
    gdk_window_get_pointer(event->window, &x, &y, &state);
  } else {
    x = (gint)event->x;
    y = (gint)event->y;
    state = (GdkModifierType)event->state;
  }

  CefMouseEvent mouse_event;
  mouse_event.x = x;
  mouse_event.y = y;
  self->ApplyPopupOffset(mouse_event.x, mouse_event.y);
  mouse_event.modifiers = GetCefStateModifiers(state);

  bool mouse_leave = (event->type == GDK_LEAVE_NOTIFY);

  host->SendMouseMoveEvent(mouse_event, mouse_leave);
  return TRUE;
}

// static
gint BrowserWindowOsrGtk::ScrollEvent(GtkWidget* widget,
                                      GdkEventScroll* event,
                                      BrowserWindowOsrGtk* self) {
  REQUIRE_MAIN_THREAD();

  if (!self->browser_.get())
    return TRUE;

  CefRefPtr<CefBrowserHost> host = self->browser_->GetHost();

  CefMouseEvent mouse_event;
  mouse_event.x = event->x;
  mouse_event.y = event->y;
  self->ApplyPopupOffset(mouse_event.x, mouse_event.y);
  mouse_event.modifiers = GetCefStateModifiers(event->state);

  static const int scrollbarPixelsPerGtkTick = 40;
  int deltaX = 0;
  int deltaY = 0;
  switch (event->direction) {
    case GDK_SCROLL_UP:
      deltaY = scrollbarPixelsPerGtkTick;
      break;
    case GDK_SCROLL_DOWN:
      deltaY = -scrollbarPixelsPerGtkTick;
      break;
    case GDK_SCROLL_LEFT:
      deltaX = scrollbarPixelsPerGtkTick;
      break;
    case GDK_SCROLL_RIGHT:
      deltaX = -scrollbarPixelsPerGtkTick;
      break;
  }

  host->SendMouseWheelEvent(mouse_event, deltaX, deltaY);
  return TRUE;
}

// static
gint BrowserWindowOsrGtk::FocusEvent(GtkWidget* widget,
                                     GdkEventFocus* event,
                                     BrowserWindowOsrGtk* self) {
  REQUIRE_MAIN_THREAD();

  if (self->browser_.get())
     self->browser_->GetHost()->SendFocusEvent(event->in == TRUE);
  return TRUE;
}

bool BrowserWindowOsrGtk::IsOverPopupWidget(int x, int y) const {
  const CefRect& rc = renderer_.popup_rect();
  int popup_right = rc.x + rc.width;
  int popup_bottom = rc.y + rc.height;
  return (x >= rc.x) && (x < popup_right) &&
         (y >= rc.y) && (y < popup_bottom);
}

int BrowserWindowOsrGtk::GetPopupXOffset() const {
  return renderer_.original_popup_rect().x - renderer_.popup_rect().x;
}

int BrowserWindowOsrGtk::GetPopupYOffset() const {
  return renderer_.original_popup_rect().y - renderer_.popup_rect().y;
}

void BrowserWindowOsrGtk::ApplyPopupOffset(int& x, int& y) const {
  if (IsOverPopupWidget(x, y)) {
    x += GetPopupXOffset();
    y += GetPopupYOffset();
  }
}

void BrowserWindowOsrGtk::EnableGL() {
  REQUIRE_MAIN_THREAD();

  if (gl_enabled_)
    return;

  ScopedGLContext scoped_gl_context(glarea_, false);
  if (!scoped_gl_context.IsValid())
    return;

  renderer_.Initialize();

  gl_enabled_ = true;
}

void BrowserWindowOsrGtk::DisableGL() {
  REQUIRE_MAIN_THREAD();

  if (!gl_enabled_)
    return;

  ScopedGLContext scoped_gl_context(glarea_, false);
  if (!scoped_gl_context.IsValid())
    return;

  renderer_.Cleanup();

  gl_enabled_ = false;
}

}  // namespace client