src/XDisplay.cc (raw)
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// XDisplay.cc for Openbox // Copyright (c) 2002 - 2002 Ben Janens (ben at orodu.net) // // Permission is hereby granted, free of charge, to any person obtaining a // copy of this software and associated documentation files (the "Software"), // to deal in the Software without restriction, including without limitation // the rights to use, copy, modify, merge, publish, distribute, sublicense, // and/or sell copies of the Software, and to permit persons to whom the // Software is furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in // all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER // DEALINGS IN THE SOFTWARE. #ifdef HAVE_CONFIG_H # include "../config.h" #endif #ifdef HAVE_UNNISTD_H # include <unistd.h> #endif #ifdef HAVE_FCNTL_H # include <fcntl.h> #endif #ifdef SHAPE # include <X11/extensions/shape.h> #endif #include "XDisplay.h" #include "Util.h" #include <iostream> #include <algorithm> using std::cerr; using std::endl; std::string XDisplay::_app_name; Window XDisplay::_last_bad_window = None; /* * X error handler to handle all X errors while the application is * running. */ int XDisplay::errorHandler(Display *d, XErrorEvent *e) { #ifdef DEBUG char errtxt[128]; XGetErrorText(d, e->error_code, errtxt, sizeof(errtxt)/sizeof(char)); cerr << _app_name.c_str() << ": X error: " << errtxt << "(" << e->error_code << ") opcodes " << e->request_code << "/" << e->minor_code << endl; cerr.flags(std::ios_base::hex); cerr << " resource 0x" << e->resourceid << endl; cerr.flags(std::ios_base::dec); #endif if (e->error_code == BadWindow) _last_bad_window = e->resourceid; return False; } XDisplay::XDisplay(const std::string &application_name, const char *dpyname) { _app_name = application_name; _grabs = 0; _hasshape = false; _display = XOpenDisplay(dpyname); if (_display == NULL) { cerr << "Could not open display. Connection to X server failed.\n"; ::exit(2); } if (-1 == fcntl(ConnectionNumber(_display), F_SETFD, 1)) { cerr << "Could not mark display connection as close-on-exec.\n"; ::exit(2); } _name = XDisplayName(dpyname); XSetErrorHandler(errorHandler); #ifdef SHAPE int waste; _hasshape = XShapeQueryExtension(_display, &_shape_event_base, &waste); #endif // SHAPE #ifndef NOCLOBBER getLockModifiers(); #endif } XDisplay::~XDisplay() { std::for_each(_screens.begin(), _screens.end(), PointerAssassin()); XCloseDisplay(_display); } /* * Grab the X server */ void XDisplay::grab() { if (_grabs++ == 0) XGrabServer(_display); } /* * Release the X server from a grab */ void XDisplay::ungrab() { if (--_grabs == 0) XUngrabServer(_display); } /* * Gets the next event on the queue from the X server. * * Returns: true if e contains a new event; false if there is no event to be * returned. */ bool XDisplay::nextEvent(XEvent &e) { if(!XPending(_display)) return false; XNextEvent(_display, &e); if (_last_bad_window != None) { if (e.xany.window == _last_bad_window) { cerr << "XDisplay::nextEvent(): Removing event for bad window from " << "event queue\n"; return false; } else _last_bad_window = None; } return true; } int XDisplay::connectionNumber() const { return ConnectionNumber(_display); } /* * Creates a font cursor in the X server and returns it. */ Cursor createCursor(unsigned int shape) const { return XCreateFontCursor(_display, shape); } #ifndef NOCLOBBER void XDisplay::getLockModifers() { NumLockMask = ScrollLockMask = 0; const XModifierKeymap* const modmap = XGetModifierMapping(display); if (modmap && modmap->max_keypermod > 0) { const int mask_table[] = { ShiftMask, LockMask, ControlMask, Mod1Mask, Mod2Mask, Mod3Mask, Mod4Mask, Mod5Mask }; const size_t size = (sizeof(mask_table) / sizeof(mask_table[0])) * modmap->max_keypermod; // get the values of the keyboard lock modifiers // Note: Caps lock is not retrieved the same way as Scroll and Num lock // since it doesn't need to be. const KeyCode num_lock_code = XKeysymToKeycode(display, XK_Num_Lock); const KeyCode scroll_lock_code = XKeysymToKeycode(display, XK_Scroll_Lock); for (size_t cnt = 0; cnt < size; ++cnt) { if (! modmap->modifiermap[cnt]) continue; if (num_lock_code == modmap->modifiermap[cnt]) NumLockMask = mask_table[cnt / modmap->max_keypermod]; if (scroll_lock_code == modmap->modifiermap[cnt]) ScrollLockMask = mask_table[cnt / modmap->max_keypermod]; } } MaskList[0] = 0; MaskList[1] = LockMask; MaskList[2] = NumLockMask; MaskList[3] = ScrollLockMask; MaskList[4] = LockMask | NumLockMask; MaskList[5] = NumLockMask | ScrollLockMask; MaskList[6] = LockMask | ScrollLockMask; MaskList[7] = LockMask | NumLockMask | ScrollLockMask; if (modmap) XFreeModifiermap(const_cast<XModifierKeymap*>(modmap)); } #endif // NOCLOBBER unsigned int XDisplay::stripModifiers(const unsigned int state) const { #ifndef NOCLOBBER return state &= ~(NumLockMask() | ScrollLockMask | LockMask); #else return state &= ~LockMask; #endif } /* * Verifies that a window has not requested to be destroyed/unmapped, so * if it is a valid window or not. * Returns: true if the window is valid; false if it is no longer valid. */ bool XDisplay::validateWindow(Window window) { XEvent event; if (XCheckTypedWindowEvent(_display, window, DestroyNotify, &event)) { XPutBackEvent(display, &event); return false; } return true; } /* * Grabs a button, but also grabs the button in every possible combination with * the keyboard lock keys, so that they do not cancel out the event. */ void BaseDisplay::grabButton(unsigned int button, unsigned int modifiers, Window grab_window, Bool owner_events, unsigned int event_mask, int pointer_mode, int keybaord_mode, Window confine_to, Cursor cursor) const { #ifndef NOCLOBBER for (size_t cnt = 0; cnt < 8; ++cnt) XGrabButton(_display, button, modifiers | MaskList[cnt], grab_window, owner_events, event_mask, pointer_mode, keybaord_mode, confine_to, cursor); #else // NOCLOBBER XGrabButton(_display, button, modifiers, grab_window, owner_events, event_mask, pointer_mode, keybaord_mode, confine_to, cursor); #endif // NOCLOBBER } /* * Releases the grab on a button, and ungrabs all possible combinations of the * keyboard lock keys. */ void BaseDisplay::ungrabButton(unsigned int button, unsigned int modifiers, Window grab_window) const { #ifndef NOCLOBBER for (size_t cnt = 0; cnt < 8; ++cnt) XUngrabButton(display, button, modifiers | MaskList[cnt], grab_window); #else // NOCLOBBER XUngrabButton(display, button, modifiers, grab_window); #endif // NOCLOBBER } |