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AutoTypeXCB.cpp
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AutoTypeXCB.cpp
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/*
* Copyright (C) 2012 Felix Geyer <debfx@fobos.de>
* Copyright (C) 2000-2008 Tom Sato <VEF00200@nifty.ne.jp>
* Copyright (C) 2017 KeePassXC Team <team@keepassxc.org>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 or (at your option)
* version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "AutoTypeXCB.h"
#include "core/Tools.h"
#include "gui/osutils/nixutils/X11Funcs.h"
#include <QX11Info>
#include <X11/XKBlib.h>
#include <X11/Xutil.h>
#include <X11/extensions/XTest.h>
/* map of ASCII non-dead keys to equivalent dead keys that need to be repeated */
static const QPair<KeySym, KeySym> deadMap[] = {
{XK_acute, XK_dead_acute},
{XK_grave, XK_dead_grave},
{XK_asciicircum, XK_dead_circumflex},
{XK_asciitilde, XK_dead_tilde},
{XK_asciitilde, XK_dead_perispomeni},
};
AutoTypePlatformX11::AutoTypePlatformX11()
{
// Qt handles XCB slightly differently so we open our own connection
m_dpy = XOpenDisplay(XDisplayString(QX11Info::display()));
m_rootWindow = QX11Info::appRootWindow();
m_atomWmState = XInternAtom(m_dpy, "WM_STATE", True);
m_atomWmName = XInternAtom(m_dpy, "WM_NAME", True);
m_atomNetWmName = XInternAtom(m_dpy, "_NET_WM_NAME", True);
m_atomString = XInternAtom(m_dpy, "STRING", True);
m_atomUtf8String = XInternAtom(m_dpy, "UTF8_STRING", True);
m_atomNetActiveWindow = XInternAtom(m_dpy, "_NET_ACTIVE_WINDOW", True);
m_atomTransientFor = XInternAtom(m_dpy, "WM_TRANSIENT_FOR", True);
m_atomWindow = XInternAtom(m_dpy, "WINDOW", True);
m_classBlacklist << "desktop_window"
<< "gnome-panel"; // Gnome
m_classBlacklist << "kdesktop"
<< "kicker"; // KDE 3
m_classBlacklist << "Plasma"; // KDE 4
m_classBlacklist << "plasmashell"; // KDE 5
m_classBlacklist << "xfdesktop"
<< "xfce4-panel"; // Xfce 4
m_xkb = nullptr;
m_loaded = true;
}
bool AutoTypePlatformX11::isAvailable()
{
int ignore;
if (!XQueryExtension(m_dpy, "XInputExtension", &ignore, &ignore, &ignore)) {
return false;
}
if (!XQueryExtension(m_dpy, "XTEST", &ignore, &ignore, &ignore)) {
return false;
}
return true;
}
void AutoTypePlatformX11::unload()
{
m_keymap.clear();
if (m_xkb) {
XkbFreeKeyboard(m_xkb, XkbAllComponentsMask, True);
m_xkb = nullptr;
}
XCloseDisplay(m_dpy);
m_dpy = nullptr;
m_loaded = false;
}
QStringList AutoTypePlatformX11::windowTitles()
{
return windowTitlesRecursive(m_rootWindow);
}
WId AutoTypePlatformX11::activeWindow()
{
Window window;
int revert_to_return;
XGetInputFocus(m_dpy, &window, &revert_to_return);
int tree;
do {
if (isTopLevelWindow(window)) {
break;
}
Window root;
Window parent;
Window* children = nullptr;
unsigned int numChildren;
tree = XQueryTree(m_dpy, window, &root, &parent, &children, &numChildren);
window = parent;
if (children) {
XFree(children);
}
} while (tree && window);
return window;
}
QString AutoTypePlatformX11::activeWindowTitle()
{
return windowTitle(activeWindow(), true);
}
AutoTypeExecutor* AutoTypePlatformX11::createExecutor()
{
return new AutoTypeExecutorX11(this);
}
QString AutoTypePlatformX11::windowTitle(Window window, bool useBlacklist)
{
QString title;
Atom type;
int format;
unsigned long nitems;
unsigned long after;
unsigned char* data = nullptr;
// the window manager spec says we should read _NET_WM_NAME first, then fall back to WM_NAME
int retVal = XGetWindowProperty(
m_dpy, window, m_atomNetWmName, 0, 1000, False, m_atomUtf8String, &type, &format, &nitems, &after, &data);
if ((retVal == 0) && data) {
title = QString::fromUtf8(reinterpret_cast<char*>(data));
} else {
XTextProperty textProp;
retVal = XGetTextProperty(m_dpy, window, &textProp, m_atomWmName);
if ((retVal != 0) && textProp.value) {
char** textList = nullptr;
int count;
if (textProp.encoding == m_atomUtf8String) {
title = QString::fromUtf8(reinterpret_cast<char*>(textProp.value));
} else if ((XmbTextPropertyToTextList(m_dpy, &textProp, &textList, &count) == 0) && textList
&& (count > 0)) {
title = QString::fromLocal8Bit(textList[0]);
} else if (textProp.encoding == m_atomString) {
title = QString::fromLocal8Bit(reinterpret_cast<char*>(textProp.value));
}
if (textList) {
XFreeStringList(textList);
}
}
if (textProp.value) {
XFree(textProp.value);
}
}
if (data) {
XFree(data);
}
if (useBlacklist && !title.isEmpty()) {
if (window == m_rootWindow) {
return {};
}
QString className = windowClassName(window);
if (m_classBlacklist.contains(className)) {
return {};
}
QList<Window> keepassxWindows = widgetsToX11Windows(QApplication::topLevelWidgets());
if (keepassxWindows.contains(window)) {
return {};
}
}
return title;
}
QString AutoTypePlatformX11::windowClassName(Window window)
{
QString className;
XClassHint wmClass;
wmClass.res_name = nullptr;
wmClass.res_class = nullptr;
if (XGetClassHint(m_dpy, window, &wmClass) && wmClass.res_name) {
className = QString::fromLocal8Bit(wmClass.res_name);
}
if (wmClass.res_name) {
XFree(wmClass.res_name);
}
if (wmClass.res_class) {
XFree(wmClass.res_class);
}
return className;
}
QList<Window> AutoTypePlatformX11::widgetsToX11Windows(const QWidgetList& widgetList)
{
QList<Window> windows;
for (const QWidget* widget : widgetList) {
windows.append(widget->effectiveWinId());
}
return windows;
}
QStringList AutoTypePlatformX11::windowTitlesRecursive(Window window)
{
QStringList titles;
if (isTopLevelWindow(window)) {
QString title = windowTitle(window, true);
if (!title.isEmpty()) {
titles.append(title);
}
}
Window root;
Window parent;
Window* children = nullptr;
unsigned int numChildren;
if (XQueryTree(m_dpy, window, &root, &parent, &children, &numChildren) && children) {
for (uint i = 0; i < numChildren; i++) {
titles.append(windowTitlesRecursive(children[i]));
}
}
if (children) {
XFree(children);
}
return titles;
}
bool AutoTypePlatformX11::isTopLevelWindow(Window window)
{
bool result = false;
Atom type = None;
int format;
unsigned long nitems;
unsigned long after;
unsigned char* data = nullptr;
// Check if the window has WM_STATE atom and it is not Withdrawn
int retVal = XGetWindowProperty(
m_dpy, window, m_atomWmState, 0, 2, False, m_atomWmState, &type, &format, &nitems, &after, &data);
if (retVal == 0 && data) {
if (type == m_atomWmState && format == 32 && nitems > 0) {
result = (static_cast<quint32>(*data) != WithdrawnState);
}
XFree(data);
} else {
// See if this is a transient window without WM_STATE
retVal = XGetWindowProperty(
m_dpy, window, m_atomTransientFor, 0, 1, False, m_atomWindow, &type, &format, &nitems, &after, &data);
if (retVal == 0 && data) {
result = true;
XFree(data);
}
}
return result;
}
/*
* Update the keyboard and modifier mapping.
* We need the KeyboardMapping for AddKeysym.
* Modifier mapping is required for clearing the modifiers.
*/
void AutoTypePlatformX11::updateKeymap()
{
if (m_xkb) {
XkbFreeKeyboard(m_xkb, XkbAllComponentsMask, True);
}
m_xkb = XkbGetMap(m_dpy, XkbAllClientInfoMask, XkbUseCoreKbd);
/* workaround X11 bug https://gitlab.freedesktop.org/xorg/xserver/-/issues/1155 */
XkbSetMap(m_dpy, XkbAllClientInfoMask, m_xkb);
XSync(m_dpy, False);
/* Build updated keymap */
m_keymap.clear();
m_remapKeycode = 0;
for (int ckeycode = m_xkb->min_key_code; ckeycode < m_xkb->max_key_code; ckeycode++) {
int groups = XkbKeyNumGroups(m_xkb, ckeycode);
/* track highest remappable keycode, don't add to keymap */
if (groups == 0) {
m_remapKeycode = ckeycode;
continue;
}
for (int cgroup = 0; cgroup < groups; cgroup++) {
XkbKeyTypePtr type = XkbKeyKeyType(m_xkb, ckeycode, cgroup);
for (int clevel = 0; clevel < type->num_levels; clevel++) {
KeySym sym = XkbKeycodeToKeysym(m_dpy, ckeycode, cgroup, clevel);
int mask = 0;
for (int nmap = 0; nmap < type->map_count; nmap++) {
XkbKTMapEntryRec map = type->map[nmap];
if (map.active && map.level == clevel) {
mask = map.mods.mask;
break;
}
}
/* explicitly disallow requiring lock modifiers (Caps Lock and Num Lock) */
if (mask & (LockMask | Mod2Mask)) {
continue;
}
m_keymap.append(AutoTypePlatformX11::KeyDesc{sym, ckeycode, cgroup, mask});
}
}
}
/* determine the keycode to use for modifiers */
XModifierKeymap* modifiers = XGetModifierMapping(m_dpy);
for (int mod_index = ShiftMapIndex; mod_index <= Mod5MapIndex; mod_index++) {
m_modifier_keycode[mod_index] = 0;
for (int mod_key = 0; mod_key < modifiers->max_keypermod; mod_key++) {
int keycode = modifiers->modifiermap[mod_index * modifiers->max_keypermod + mod_key];
if (keycode) {
m_modifier_keycode[mod_index] = keycode;
break;
}
}
}
XFreeModifiermap(modifiers);
}
// --------------------------------------------------------------------------
// The following code is taken from xvkbd 3.0 and has been slightly modified.
// --------------------------------------------------------------------------
/*
* Send event to the focused window.
* If input focus is specified explicitly, select the window
* before send event to the window.
*/
void AutoTypePlatformX11::SendKeyEvent(unsigned keycode, bool press)
{
XSync(m_dpy, False);
int (*oldHandler)(Display*, XErrorEvent*) = XSetErrorHandler(MyErrorHandler);
XTestFakeKeyEvent(m_dpy, keycode, press, 0);
XFlush(m_dpy);
XSync(m_dpy, False);
XSetErrorHandler(oldHandler);
}
/*
* Send a modifier press/release event for all modifiers
* which are set in the mask variable.
*/
void AutoTypePlatformX11::SendModifiers(unsigned int mask, bool press)
{
int mod_index;
for (mod_index = ShiftMapIndex; mod_index <= Mod5MapIndex; mod_index++) {
if (mask & (1 << mod_index)) {
SendKeyEvent(m_modifier_keycode[mod_index], press);
}
}
}
/*
* Determines the keycode and modifier mask for the given
* keysym.
*/
bool AutoTypePlatformX11::GetKeycode(KeySym keysym, int* keycode, int* group, unsigned int* mask, bool* repeat)
{
const KeyDesc* desc = nullptr;
bool isDead = false;
for (const auto& key : m_keymap) {
if (key.sym == keysym) {
// pick this description if we don't have any for this sym or this matches the current group
if (desc == nullptr || key.group == *group) {
desc = &key;
}
}
}
// try to find the best dead key mapping if we're unlucky to have one
if (!desc) {
for (const auto& map : deadMap) {
if (map.first == keysym) {
for (const auto& key : m_keymap) {
if (key.sym == map.second) {
// same as above, we try to match the group so no breaking out
if (desc == nullptr || key.group == *group) {
desc = &key;
isDead = true;
}
}
}
}
}
}
if (desc) {
*keycode = desc->code;
*group = desc->group;
*mask = desc->mask;
*repeat = isDead;
return true;
}
/* if we can't find an existing key for this keysym, try remapping */
if (RemapKeycode(keysym)) {
*keycode = m_remapKeycode;
*group = 0;
*mask = 0;
*repeat = false;
return true;
}
return false;
}
/*
* Get remapped keycode for any keysym.
*/
bool AutoTypePlatformX11::RemapKeycode(KeySym keysym)
{
if (!m_remapKeycode) {
return false;
}
if (keysym != NoSymbol) {
int type = XkbOneLevelIndex;
if (XkbChangeTypesOfKey(m_xkb, m_remapKeycode, 1, XkbGroup1Mask, &type, NULL) != Success) {
return false;
}
XkbKeySymEntry(m_xkb, m_remapKeycode, 0, 0) = keysym;
} else {
XkbChangeTypesOfKey(m_xkb, m_remapKeycode, 0, XkbGroup1Mask, NULL, NULL);
}
XkbSetMap(m_dpy, XkbAllClientInfoMask, m_xkb);
XFlush(m_dpy);
XSync(m_dpy, False);
return true;
}
/*
* Send sequence of KeyPressed/KeyReleased events to the focused
* window to simulate keyboard. If modifiers (shift, control, etc)
* are set ON, many events will be sent.
*/
AutoTypeAction::Result AutoTypePlatformX11::sendKey(KeySym keysym, unsigned int modifiers)
{
if (keysym == NoSymbol) {
return AutoTypeAction::Result::Failed(tr("Trying to send invalid keyboard symbol."));
}
int keycode;
int group;
int group_active;
unsigned int wanted_mask;
bool repeat;
/* pull current active layout group */
XkbStateRec state;
XkbGetState(m_dpy, XkbUseCoreKbd, &state);
group_active = state.group;
/* tell GetKeycode we would prefer a key from active group */
group = group_active;
Window root, child;
int root_x, root_y, x, y;
unsigned int original_mask;
XSync(m_dpy, False);
XQueryPointer(m_dpy, m_rootWindow, &root, &child, &root_x, &root_y, &x, &y, &original_mask);
/* fail permanently if Caps Lock is on */
if (original_mask & LockMask) {
return AutoTypeAction::Result::Failed(tr("Sequence aborted: Caps Lock is on"));
}
/* retry if keysym affecting modifier is held except Num Lock (Mod2Mask) */
if (original_mask & (ShiftMask | ControlMask | Mod1Mask | Mod3Mask | Mod4Mask | Mod5Mask)) {
return AutoTypeAction::Result::Retry(tr("Sequence aborted: Modifier keys held by user"));
}
/* determine keycode, group and mask for the given keysym */
if (!GetKeycode(keysym, &keycode, &group, &wanted_mask, &repeat)) {
return AutoTypeAction::Result::Failed(tr("Unable to get valid keycode for key: ")
+ QString(XKeysymToString(keysym)));
}
wanted_mask |= modifiers;
/* modifiers that need to be held but aren't */
unsigned int press_mask = wanted_mask & ~original_mask;
/* change layout group if necessary */
if (group_active != group) {
XkbLockGroup(m_dpy, XkbUseCoreKbd, group);
XFlush(m_dpy);
}
/* hold modifiers */
SendModifiers(press_mask, true);
/* press and release key, with repeat if necessary */
for (int i = 0; i < (repeat ? 2 : 1); i++) {
SendKeyEvent(keycode, true);
SendKeyEvent(keycode, false);
}
/* release modifiers */
SendModifiers(press_mask, false);
/* reset layout group if necessary */
if (group_active != group) {
XkbLockGroup(m_dpy, XkbUseCoreKbd, group_active);
XFlush(m_dpy);
}
/* reset remap to prevent leaking remap keysyms longer than necessary */
if (keycode == m_remapKeycode) {
RemapKeycode(NoSymbol);
}
return AutoTypeAction::Result::Ok();
}
int AutoTypePlatformX11::MyErrorHandler(Display* my_dpy, XErrorEvent* event)
{
char msg[200];
if (event->error_code == BadWindow) {
return 0;
}
XGetErrorText(my_dpy, event->error_code, msg, sizeof(msg) - 1);
qWarning("X error trapped: %s, request-code=%d\n", msg, event->request_code);
return 0;
}
AutoTypeExecutorX11::AutoTypeExecutorX11(AutoTypePlatformX11* platform)
: m_platform(platform)
{
}
AutoTypeAction::Result AutoTypeExecutorX11::execBegin(const AutoTypeBegin* action)
{
Q_UNUSED(action);
m_platform->updateKeymap();
return AutoTypeAction::Result::Ok();
}
AutoTypeAction::Result AutoTypeExecutorX11::execType(const AutoTypeKey* action)
{
AutoTypeAction::Result result;
if (action->key != Qt::Key_unknown) {
result = m_platform->sendKey(qtToNativeKeyCode(action->key), qtToNativeModifiers(action->modifiers));
} else {
result = m_platform->sendKey(qcharToNativeKeyCode(action->character), qtToNativeModifiers(action->modifiers));
}
if (result.isOk()) {
Tools::sleep(execDelayMs);
}
return result;
}
AutoTypeAction::Result AutoTypeExecutorX11::execClearField(const AutoTypeClearField* action)
{
Q_UNUSED(action);
execType(new AutoTypeKey(Qt::Key_Home, Qt::ControlModifier));
execType(new AutoTypeKey(Qt::Key_End, Qt::ControlModifier | Qt::ShiftModifier));
execType(new AutoTypeKey(Qt::Key_Backspace));
return AutoTypeAction::Result::Ok();
}
bool AutoTypePlatformX11::raiseWindow(WId window)
{
if (m_atomNetActiveWindow == None) {
return false;
}
XRaiseWindow(m_dpy, window);
XEvent event;
event.xclient.type = ClientMessage;
event.xclient.serial = 0;
event.xclient.send_event = True;
event.xclient.window = window;
event.xclient.message_type = m_atomNetActiveWindow;
event.xclient.format = 32;
event.xclient.data.l[0] = 1; // FromApplication
event.xclient.data.l[1] = QX11Info::appUserTime();
QWidget* activeWindow = QApplication::activeWindow();
if (activeWindow) {
event.xclient.data.l[2] = activeWindow->internalWinId();
} else {
event.xclient.data.l[2] = 0;
}
event.xclient.data.l[3] = 0;
event.xclient.data.l[4] = 0;
XSendEvent(m_dpy, m_rootWindow, False, SubstructureRedirectMask | SubstructureNotifyMask, &event);
XFlush(m_dpy);
return true;
}