FreeRDP/client/X11/xf_keyboard.c

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/**
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* FreeRDP: A Remote Desktop Protocol Implementation
* X11 Keyboard Handling
*
* Copyright 2011 Marc-Andre Moreau <marcandre.moreau@gmail.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
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#include <freerdp/config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <winpr/crt.h>
#include <winpr/path.h>
#include <winpr/assert.h>
#include <winpr/collections.h>
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#include <freerdp/utils/string.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/keysym.h>
#include <X11/XKBlib.h>
#include <freerdp/locale/keyboard.h>
#include "xf_event.h"
#include "xf_keyboard.h"
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#include <freerdp/log.h>
#define TAG CLIENT_TAG("x11")
static void xf_keyboard_modifier_map_free(xfContext* xfc)
{
WINPR_ASSERT(xfc);
if (xfc->modifierMap)
{
XFreeModifiermap(xfc->modifierMap);
xfc->modifierMap = NULL;
}
}
BOOL xf_keyboard_update_modifier_map(xfContext* xfc)
{
WINPR_ASSERT(xfc);
xf_keyboard_modifier_map_free(xfc);
xfc->modifierMap = XGetModifierMapping(xfc->display);
return xfc->modifierMap != NULL;
}
static void xf_keyboard_send_key(xfContext* xfc, BOOL down, BOOL repeat, const XKeyEvent* ev);
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static BOOL xf_sync_kbd_state(xfContext* xfc)
{
const UINT32 syncFlags = xf_keyboard_get_toggle_keys_state(xfc);
WINPR_ASSERT(xfc);
return freerdp_input_send_synchronize_event(xfc->common.context.input, syncFlags);
}
static void xf_keyboard_clear(xfContext* xfc)
{
WINPR_ASSERT(xfc);
ZeroMemory(xfc->KeyboardState, sizeof(xfc->KeyboardState));
}
static BOOL xf_keyboard_action_script_init(xfContext* xfc)
{
wObject* obj;
FILE* keyScript;
char* keyCombination;
char buffer[1024] = { 0 };
char command[1024] = { 0 };
const rdpSettings* settings;
const char* ActionScript;
WINPR_ASSERT(xfc);
settings = xfc->common.context.settings;
WINPR_ASSERT(settings);
ActionScript = freerdp_settings_get_string(settings, FreeRDP_ActionScript);
xfc->actionScriptExists = winpr_PathFileExists(ActionScript);
if (!xfc->actionScriptExists)
return FALSE;
xfc->keyCombinations = ArrayList_New(TRUE);
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if (!xfc->keyCombinations)
return FALSE;
obj = ArrayList_Object(xfc->keyCombinations);
obj->fnObjectFree = free;
sprintf_s(command, sizeof(command), "%s key", ActionScript);
keyScript = popen(command, "r");
if (!keyScript)
{
xfc->actionScriptExists = FALSE;
return FALSE;
}
while (fgets(buffer, sizeof(buffer), keyScript) != NULL)
{
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char* context = NULL;
strtok_s(buffer, "\n", &context);
keyCombination = _strdup(buffer);
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if (!keyCombination || !ArrayList_Append(xfc->keyCombinations, keyCombination))
{
ArrayList_Free(xfc->keyCombinations);
xfc->actionScriptExists = FALSE;
pclose(keyScript);
return FALSE;
}
}
pclose(keyScript);
return xf_event_action_script_init(xfc);
}
static void xf_keyboard_action_script_free(xfContext* xfc)
{
xf_event_action_script_free(xfc);
if (xfc->keyCombinations)
{
ArrayList_Free(xfc->keyCombinations);
xfc->keyCombinations = NULL;
xfc->actionScriptExists = FALSE;
}
}
BOOL xf_keyboard_init(xfContext* xfc)
{
rdpSettings* settings;
WINPR_ASSERT(xfc);
settings = xfc->common.context.settings;
WINPR_ASSERT(settings);
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xf_keyboard_clear(xfc);
xfc->KeyboardLayout = settings->KeyboardLayout;
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xfc->KeyboardLayout =
freerdp_keyboard_init_ex(xfc->KeyboardLayout, settings->KeyboardRemappingList);
settings->KeyboardLayout = xfc->KeyboardLayout;
if (!xf_keyboard_update_modifier_map(xfc))
return FALSE;
xf_keyboard_action_script_init(xfc);
return TRUE;
}
void xf_keyboard_free(xfContext* xfc)
{
xf_keyboard_modifier_map_free(xfc);
xf_keyboard_action_script_free(xfc);
}
void xf_keyboard_key_press(xfContext* xfc, const XKeyEvent* event, KeySym keysym)
{
BOOL last;
WINPR_ASSERT(xfc);
WINPR_ASSERT(event);
if (event->keycode < 8)
return;
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last = xfc->KeyboardState[event->keycode];
xfc->KeyboardState[event->keycode] = TRUE;
if (xf_keyboard_handle_special_keys(xfc, keysym))
return;
xf_keyboard_send_key(xfc, TRUE, last, event);
}
void xf_keyboard_key_release(xfContext* xfc, const XKeyEvent* event, KeySym keysym)
{
WINPR_ASSERT(xfc);
WINPR_ASSERT(event);
if (event->keycode < 8)
return;
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BOOL last = xfc->KeyboardState[event->keycode];
xfc->KeyboardState[event->keycode] = FALSE;
xf_keyboard_handle_special_keys_release(xfc, keysym);
xf_keyboard_send_key(xfc, FALSE, last, event);
}
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void xf_keyboard_release_all_keypress(xfContext* xfc)
{
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size_t keycode;
DWORD rdp_scancode;
WINPR_ASSERT(xfc);
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for (keycode = 0; keycode < ARRAYSIZE(xfc->KeyboardState); keycode++)
{
if (xfc->KeyboardState[keycode])
{
rdp_scancode = freerdp_keyboard_get_rdp_scancode_from_x11_keycode(keycode);
// release tab before releasing the windows key.
// this stops the start menu from opening on unfocus event.
if (rdp_scancode == RDP_SCANCODE_LWIN)
freerdp_input_send_keyboard_event_ex(xfc->common.context.input, FALSE, FALSE,
RDP_SCANCODE_TAB);
freerdp_input_send_keyboard_event_ex(xfc->common.context.input, FALSE, FALSE,
rdp_scancode);
xfc->KeyboardState[keycode] = FALSE;
}
}
xf_sync_kbd_state(xfc);
}
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BOOL xf_keyboard_key_pressed(xfContext* xfc, KeySym keysym)
{
KeyCode keycode = XKeysymToKeycode(xfc->display, keysym);
return xfc->KeyboardState[keycode];
}
void xf_keyboard_send_key(xfContext* xfc, BOOL down, BOOL repeat, const XKeyEvent* event)
{
DWORD rdp_scancode;
rdpInput* input;
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WINPR_ASSERT(xfc);
WINPR_ASSERT(event);
input = xfc->common.context.input;
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WINPR_ASSERT(input);
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rdp_scancode = freerdp_keyboard_get_rdp_scancode_from_x11_keycode(event->keycode);
if (rdp_scancode == RDP_SCANCODE_PAUSE && !xf_keyboard_key_pressed(xfc, XK_Control_L) &&
!xf_keyboard_key_pressed(xfc, XK_Control_R))
{
/* Pause without Ctrl has to be sent as a series of keycodes
* in a single input PDU. Pause only happens on "press";
* no code is sent on "release".
*/
if (down)
{
freerdp_input_send_keyboard_pause_event(input);
}
}
else
{
if (freerdp_settings_get_bool(xfc->common.context.settings, FreeRDP_UnicodeInput))
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{
wchar_t buffer[32] = { 0 };
int xwc = -1;
switch (rdp_scancode)
{
case RDP_SCANCODE_RETURN:
break;
default:
{
XIM xim = XOpenIM(xfc->display, 0, 0, 0);
XIC xic =
XCreateIC(xim, XNInputStyle, XIMPreeditNothing | XIMStatusNothing, NULL);
KeySym ignore = { 0 };
Status return_status;
XKeyEvent ev = *event;
ev.type = KeyPress;
xwc = XwcLookupString(xic, &ev, buffer, ARRAYSIZE(buffer), &ignore,
&return_status);
}
break;
}
if (xwc < 1)
{
if (rdp_scancode == RDP_SCANCODE_UNKNOWN)
WLog_ERR(TAG, "Unknown key with X keycode 0x%02" PRIx8 "", event->keycode);
else
freerdp_input_send_keyboard_event_ex(input, down, repeat, rdp_scancode);
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}
else
freerdp_input_send_unicode_keyboard_event(input, down ? 0 : KBD_FLAGS_RELEASE,
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buffer[0]);
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}
else if (rdp_scancode == RDP_SCANCODE_UNKNOWN)
WLog_ERR(TAG, "Unknown key with X keycode 0x%02" PRIx8 "", event->keycode);
else
freerdp_input_send_keyboard_event_ex(input, down, repeat, rdp_scancode);
if ((rdp_scancode == RDP_SCANCODE_CAPSLOCK) && (down == FALSE))
{
xf_sync_kbd_state(xfc);
}
}
}
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int xf_keyboard_read_keyboard_state(xfContext* xfc)
{
int dummy;
Window wdummy;
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UINT32 state = 0;
if (!xfc->remote_app && xfc->window)
{
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XQueryPointer(xfc->display, xfc->window->handle, &wdummy, &wdummy, &dummy, &dummy, &dummy,
&dummy, &state);
}
else
{
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XQueryPointer(xfc->display, DefaultRootWindow(xfc->display), &wdummy, &wdummy, &dummy,
&dummy, &dummy, &dummy, &state);
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}
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return state;
}
static int xf_keyboard_get_keymask(xfContext* xfc, int keysym)
{
int keysymMask = 0;
KeyCode keycode = XKeysymToKeycode(xfc->display, keysym);
if (keycode == NoSymbol)
return 0;
WINPR_ASSERT(xfc->modifierMap);
for (int modifierpos = 0; modifierpos < 8; modifierpos++)
{
int offset = xfc->modifierMap->max_keypermod * modifierpos;
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for (int key = 0; key < xfc->modifierMap->max_keypermod; key++)
{
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if (xfc->modifierMap->modifiermap[offset + key] == keycode)
{
keysymMask |= 1 << modifierpos;
}
}
}
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return keysymMask;
}
BOOL xf_keyboard_get_key_state(xfContext* xfc, int state, int keysym)
{
int keysymMask = xf_keyboard_get_keymask(xfc, keysym);
if (!keysymMask)
return FALSE;
return (state & keysymMask) ? TRUE : FALSE;
}
static BOOL xf_keyboard_set_key_state(xfContext* xfc, BOOL on, int keysym)
{
if (!xfc->xkbAvailable)
return FALSE;
const int keysymMask = xf_keyboard_get_keymask(xfc, keysym);
if (!keysymMask)
{
return FALSE;
}
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return XkbLockModifiers(xfc->display, XkbUseCoreKbd, keysymMask, on ? keysymMask : 0);
}
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UINT32 xf_keyboard_get_toggle_keys_state(xfContext* xfc)
{
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UINT32 toggleKeysState = 0;
const int state = xf_keyboard_read_keyboard_state(xfc);
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if (xf_keyboard_get_key_state(xfc, state, XK_Scroll_Lock))
toggleKeysState |= KBD_SYNC_SCROLL_LOCK;
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if (xf_keyboard_get_key_state(xfc, state, XK_Num_Lock))
toggleKeysState |= KBD_SYNC_NUM_LOCK;
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if (xf_keyboard_get_key_state(xfc, state, XK_Caps_Lock))
toggleKeysState |= KBD_SYNC_CAPS_LOCK;
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if (xf_keyboard_get_key_state(xfc, state, XK_Kana_Lock))
toggleKeysState |= KBD_SYNC_KANA_LOCK;
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return toggleKeysState;
}
static void xk_keyboard_update_modifier_keys(xfContext* xfc)
{
const int keysyms[] = { XK_Shift_L, XK_Shift_R, XK_Alt_L, XK_Alt_R,
XK_Control_L, XK_Control_R, XK_Super_L, XK_Super_R };
xf_keyboard_clear(xfc);
const int state = xf_keyboard_read_keyboard_state(xfc);
for (size_t i = 0; i < ARRAYSIZE(keysyms); i++)
{
if (xf_keyboard_get_key_state(xfc, state, keysyms[i]))
{
const KeyCode keycode = XKeysymToKeycode(xfc->display, keysyms[i]);
xfc->KeyboardState[keycode] = TRUE;
}
}
}
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void xf_keyboard_focus_in(xfContext* xfc)
{
UINT32 state = 0;
Window w = None;
int d = 0, x = 0, y = 0;
WINPR_ASSERT(xfc);
if (!xfc->display || !xfc->window)
return;
rdpInput* input = xfc->common.context.input;
WINPR_ASSERT(input);
const UINT32 syncFlags = xf_keyboard_get_toggle_keys_state(xfc);
freerdp_input_send_focus_in_event(input, syncFlags);
xk_keyboard_update_modifier_keys(xfc);
/* finish with a mouse pointer position like mstsc.exe if required */
if (xfc->remote_app || !xfc->window)
return;
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if (XQueryPointer(xfc->display, xfc->window->handle, &w, &w, &d, &d, &x, &y, &state))
{
if ((x >= 0) && (x < xfc->window->width) && (y >= 0) && (y < xfc->window->height))
{
xf_event_adjust_coordinates(xfc, &x, &y);
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freerdp_client_send_button_event(&xfc->common, FALSE, PTR_FLAGS_MOVE, x, y);
}
}
}
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static int xf_keyboard_execute_action_script(xfContext* xfc, XF_MODIFIER_KEYS* mod, KeySym keysym)
{
int status = 1;
BOOL match = FALSE;
char buffer[1024] = { 0 };
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char command[2048] = { 0 };
char combination[1024] = { 0 };
if (!xfc->actionScriptExists)
return 1;
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if ((keysym == XK_Shift_L) || (keysym == XK_Shift_R) || (keysym == XK_Alt_L) ||
(keysym == XK_Alt_R) || (keysym == XK_Control_L) || (keysym == XK_Control_R))
{
return 1;
}
const char* keyStr = XKeysymToString(keysym);
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if (keyStr == 0)
{
return 1;
}
if (mod->Shift)
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winpr_str_append("Shift", combination, sizeof(combination), "+");
if (mod->Ctrl)
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winpr_str_append("Ctrl", combination, sizeof(combination), "+");
if (mod->Alt)
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winpr_str_append("Alt", combination, sizeof(combination), "+");
if (mod->Super)
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winpr_str_append("Super", combination, sizeof(combination), "+");
winpr_str_append(keyStr, combination, sizeof(combination), NULL);
const size_t count = ArrayList_Count(xfc->keyCombinations);
for (size_t index = 0; index < count; index++)
{
const char* keyCombination = (const char*)ArrayList_GetItem(xfc->keyCombinations, index);
if (_stricmp(keyCombination, combination) == 0)
{
match = TRUE;
break;
}
}
if (!match)
return 1;
const char* ActionScript =
freerdp_settings_get_string(xfc->common.context.settings, FreeRDP_ActionScript);
sprintf_s(command, sizeof(command), "%s key %s", ActionScript, combination);
FILE* keyScript = popen(command, "r");
if (!keyScript)
return -1;
while (fgets(buffer, sizeof(buffer), keyScript) != NULL)
{
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char* context = NULL;
strtok_s(buffer, "\n", &context);
if (strcmp(buffer, "key-local") == 0)
status = 0;
}
if (pclose(keyScript) == -1)
status = -1;
return status;
}
static int xk_keyboard_get_modifier_keys(xfContext* xfc, XF_MODIFIER_KEYS* mod)
{
mod->LeftShift = xf_keyboard_key_pressed(xfc, XK_Shift_L);
mod->RightShift = xf_keyboard_key_pressed(xfc, XK_Shift_R);
mod->Shift = mod->LeftShift || mod->RightShift;
mod->LeftAlt = xf_keyboard_key_pressed(xfc, XK_Alt_L);
mod->RightAlt = xf_keyboard_key_pressed(xfc, XK_Alt_R);
mod->Alt = mod->LeftAlt || mod->RightAlt;
mod->LeftCtrl = xf_keyboard_key_pressed(xfc, XK_Control_L);
mod->RightCtrl = xf_keyboard_key_pressed(xfc, XK_Control_R);
mod->Ctrl = mod->LeftCtrl || mod->RightCtrl;
mod->LeftSuper = xf_keyboard_key_pressed(xfc, XK_Super_L);
mod->RightSuper = xf_keyboard_key_pressed(xfc, XK_Super_R);
mod->Super = mod->LeftSuper || mod->RightSuper;
return 0;
}
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BOOL xf_keyboard_handle_special_keys(xfContext* xfc, KeySym keysym)
{
XF_MODIFIER_KEYS mod = { 0 };
xk_keyboard_get_modifier_keys(xfc, &mod);
// remember state of RightCtrl to ungrab keyboard if next action is release of RightCtrl
// do not return anything such that the key could be used by client if ungrab is not the goal
if (keysym == XK_Control_R)
{
if (mod.RightCtrl && xfc->firstPressRightCtrl)
{
// Right Ctrl is pressed, getting ready to ungrab
xfc->ungrabKeyboardWithRightCtrl = TRUE;
xfc->firstPressRightCtrl = FALSE;
}
}
else
{
// some other key has been pressed, abort ungrabbing
if (xfc->ungrabKeyboardWithRightCtrl)
xfc->ungrabKeyboardWithRightCtrl = FALSE;
}
if (!xf_keyboard_execute_action_script(xfc, &mod, keysym))
{
return TRUE;
}
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if (!xfc->remote_app && xfc->fullscreen_toggle)
{
if (keysym == XK_Return)
{
if (mod.Ctrl && mod.Alt)
{
/* Ctrl-Alt-Enter: toggle full screen */
xf_toggle_fullscreen(xfc);
return TRUE;
}
}
}
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if ((keysym == XK_c) || (keysym == XK_C))
{
if (mod.Ctrl && mod.Alt)
{
/* Ctrl-Alt-C: toggle control */
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if (freerdp_client_encomsp_toggle_control(xfc->common.encomsp))
return TRUE;
}
}
#if 0 /* set to 1 to enable multi touch gesture simulation via keyboard */
#ifdef WITH_XRENDER
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if (!xfc->remote_app && xfc->settings->MultiTouchGestures)
{
rdpContext* ctx = &xfc->common.context;
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if (mod.Ctrl && mod.Alt)
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{
int pdx = 0;
int pdy = 0;
int zdx = 0;
int zdy = 0;
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switch (keysym)
{
case XK_0: /* Ctrl-Alt-0: Reset scaling and panning */
xfc->scaledWidth = xfc->sessionWidth;
xfc->scaledHeight = xfc->sessionHeight;
xfc->offset_x = 0;
xfc->offset_y = 0;
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if (!xfc->fullscreen && (xfc->sessionWidth != xfc->window->width ||
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xfc->sessionHeight != xfc->window->height))
{
xf_ResizeDesktopWindow(xfc, xfc->window, xfc->sessionWidth, xfc->sessionHeight);
}
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xf_draw_screen(xfc, 0, 0, xfc->sessionWidth, xfc->sessionHeight);
return TRUE;
case XK_1: /* Ctrl-Alt-1: Zoom in */
zdx = zdy = 10;
break;
case XK_2: /* Ctrl-Alt-2: Zoom out */
zdx = zdy = -10;
break;
case XK_3: /* Ctrl-Alt-3: Pan left */
pdx = -10;
break;
case XK_4: /* Ctrl-Alt-4: Pan right */
pdx = 10;
break;
case XK_5: /* Ctrl-Alt-5: Pan up */
pdy = -10;
break;
case XK_6: /* Ctrl-Alt-6: Pan up */
pdy = 10;
break;
}
if (pdx != 0 || pdy != 0)
{
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PanningChangeEventArgs e;
EventArgsInit(&e, "xfreerdp");
e.dx = pdx;
e.dy = pdy;
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PubSub_OnPanningChange(ctx->pubSub, xfc, &e);
return TRUE;
}
if (zdx != 0 || zdy != 0)
{
ZoomingChangeEventArgs e;
EventArgsInit(&e, "xfreerdp");
e.dx = zdx;
e.dy = zdy;
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PubSub_OnZoomingChange(ctx->pubSub, xfc, &e);
return TRUE;
}
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}
}
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#endif /* WITH_XRENDER defined */
#endif /* pinch/zoom/pan simulation */
return FALSE;
}
void xf_keyboard_handle_special_keys_release(xfContext* xfc, KeySym keysym)
{
if (keysym != XK_Control_R)
return;
xfc->firstPressRightCtrl = TRUE;
if (!xfc->ungrabKeyboardWithRightCtrl)
return;
// all requirements for ungrab are fulfilled, ungrabbing now
XF_MODIFIER_KEYS mod = { 0 };
xk_keyboard_get_modifier_keys(xfc, &mod);
if (!mod.RightCtrl)
{
if (!xfc->fullscreen)
{
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freerdp_client_encomsp_toggle_control(xfc->common.encomsp);
}
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xfc->mouse_active = FALSE;
xf_ungrab(xfc);
}
// ungrabbed
xfc->ungrabKeyboardWithRightCtrl = FALSE;
}
BOOL xf_keyboard_set_indicators(rdpContext* context, UINT16 led_flags)
{
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xfContext* xfc = (xfContext*)context;
xf_keyboard_set_key_state(xfc, led_flags & KBD_SYNC_SCROLL_LOCK, XK_Scroll_Lock);
xf_keyboard_set_key_state(xfc, led_flags & KBD_SYNC_NUM_LOCK, XK_Num_Lock);
xf_keyboard_set_key_state(xfc, led_flags & KBD_SYNC_CAPS_LOCK, XK_Caps_Lock);
xf_keyboard_set_key_state(xfc, led_flags & KBD_SYNC_KANA_LOCK, XK_Kana_Lock);
return TRUE;
}
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BOOL xf_keyboard_set_ime_status(rdpContext* context, UINT16 imeId, UINT32 imeState,
UINT32 imeConvMode)
{
if (!context)
return FALSE;
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WLog_WARN(TAG,
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"KeyboardSetImeStatus(unitId=%04" PRIx16 ", imeState=%08" PRIx32
", imeConvMode=%08" PRIx32 ") ignored",
imeId, imeState, imeConvMode);
return TRUE;
}
BOOL xf_ungrab(xfContext* xfc)
{
WINPR_ASSERT(xfc);
XUngrabKeyboard(xfc->display, CurrentTime);
XUngrabPointer(xfc->display, CurrentTime);
xfc->common.mouse_grabbed = FALSE;
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return TRUE;
}