306 lines
8.1 KiB
C++
306 lines
8.1 KiB
C++
// -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
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#include "config.h"
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#include "display.hh"
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#include "util.hh"
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extern "C" {
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#include <X11/keysym.h>
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#ifdef XKB
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#include <X11/XKBlib.h>
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#endif // XKB
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#ifdef SHAPE
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#include <X11/extensions/shape.h>
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#endif // SHAPE
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#ifdef XINERAMA
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#include <X11/extensions/Xinerama.h>
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#endif // XINERAMA
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#ifdef HAVE_SIGNAL_H
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# include <signal.h>
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#endif // HAVE_SIGNAL_H
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#ifdef HAVE_FCNTL_H
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# include <fcntl.h>
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#endif // HAVE_FCNTL_H
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#ifdef HAVE_UNISTD_H
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# include <sys/types.h>
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# include <unistd.h>
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#endif // HAVE_UNISTD_H
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#include "../src/gettext.h"
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#define _(str) gettext(str)
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}
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#include <cstdio>
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namespace otk {
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Display *display = (Display*) 0;
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static int xerrorHandler(::Display *d, XErrorEvent *e)
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{
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if (!display->ignoreErrors()) {
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#ifdef DEBUG
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char errtxt[128];
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//if (e->error_code != BadWindow)
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{
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XGetErrorText(d, e->error_code, errtxt, 127);
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printf("X Error: %s\n", errtxt);
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if (e->error_code != BadWindow)
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abort();
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}
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#else
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(void)d;
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(void)e;
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#endif
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}
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return false;
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}
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Display::Display(::Display *d)
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: _display(d),
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_xkb(false),
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_xkb_event_basep(0),
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_shape(false),
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_shape_event_basep(0),
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_xinerama(false),
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_xinerama_event_basep(0),
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_mask_list(),
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_num_lock_mask(0),
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_scroll_lock_mask(0),
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_grab_count(0)
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{
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int junk;
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(void)junk;
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assert(_display);
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display = this;
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if (fcntl(ConnectionNumber(_display), F_SETFD, 1) == -1) {
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printf(_("Couldn't mark display connection as close-on-exec.\n\n"));
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::exit(1);
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}
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if (!XSupportsLocale())
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printf(_("X server does not support locale.\n"));
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if (!XSetLocaleModifiers(""))
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printf(_("Cannot set locale modifiers for the X server.\n"));
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// set our error handler for X errors
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XSetErrorHandler(xerrorHandler);
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// set the DISPLAY environment variable for any lauched children, to the
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// display we're using, so they open in the right place.
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putenv(std::string("DISPLAY=") + DisplayString(_display));
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// find the availability of X extensions we like to use
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#ifdef XKB
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_xkb = XkbQueryExtension(_display, &junk, &_xkb_event_basep, &junk, NULL,
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NULL);
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#endif
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#ifdef SHAPE
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_shape = XShapeQueryExtension(_display, &_shape_event_basep, &junk);
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#endif
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#ifdef XINERAMA
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_xinerama = XineramaQueryExtension(_display, &_xinerama_event_basep, &junk);
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#endif // XINERAMA
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// get lock masks that are defined by the display (not constant)
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_modmap = XGetModifierMapping(_display);
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assert(_modmap);
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if (_modmap && _modmap->max_keypermod > 0) {
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const int mask_table[] = {
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ShiftMask, LockMask, ControlMask, Mod1Mask,
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Mod2Mask, Mod3Mask, Mod4Mask, Mod5Mask
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};
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const size_t size = (sizeof(mask_table) / sizeof(mask_table[0])) *
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_modmap->max_keypermod;
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// get the values of the keyboard lock modifiers
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// Note: Caps lock is not retrieved the same way as Scroll and Num lock
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// since it doesn't need to be.
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const KeyCode num_lock = XKeysymToKeycode(_display, XK_Num_Lock);
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const KeyCode scroll_lock = XKeysymToKeycode(_display, XK_Scroll_Lock);
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for (size_t cnt = 0; cnt < size; ++cnt) {
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if (! _modmap->modifiermap[cnt]) continue;
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if (num_lock == _modmap->modifiermap[cnt])
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_num_lock_mask = mask_table[cnt / _modmap->max_keypermod];
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if (scroll_lock == _modmap->modifiermap[cnt])
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_scroll_lock_mask = mask_table[cnt / _modmap->max_keypermod];
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}
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}
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_mask_list[0] = 0;
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_mask_list[1] = LockMask;
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_mask_list[2] = _num_lock_mask;
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_mask_list[3] = LockMask | _num_lock_mask;
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_mask_list[4] = _scroll_lock_mask;
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_mask_list[5] = _scroll_lock_mask | LockMask;
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_mask_list[6] = _scroll_lock_mask | _num_lock_mask;
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_mask_list[7] = _scroll_lock_mask | LockMask | _num_lock_mask;
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/*
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If the default depth is at least 8 we will use that,
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otherwise we try to find the largest TrueColor visual.
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Preference is given to 24 bit over larger depths if 24 bit is an option.
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*/
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int screen = DefaultScreen(_display);
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_depth = DefaultDepth(_display, screen);
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_visual = DefaultVisual(_display, screen);
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_colormap = DefaultColormap(_display, screen);
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if (_depth < 8) {
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// search for a TrueColor Visual... if we can't find one...
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// we will use the default visual for the screen
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XVisualInfo vinfo_template, *vinfo_return;
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int vinfo_nitems;
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int best = -1;
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vinfo_template.screen = screen;
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vinfo_template.c_class = TrueColor;
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vinfo_return = XGetVisualInfo(_display,
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VisualScreenMask | VisualClassMask,
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&vinfo_template, &vinfo_nitems);
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if (vinfo_return) {
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int max_depth = 1;
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for (int i = 0; i < vinfo_nitems; ++i) {
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if (vinfo_return[i].depth > max_depth) {
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if (max_depth == 24 && vinfo_return[i].depth > 24)
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break; // prefer 24 bit over 32
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max_depth = vinfo_return[i].depth;
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best = i;
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}
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}
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if (max_depth < _depth) best = -1;
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}
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if (best != -1) {
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_depth = vinfo_return[best].depth;
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_visual = vinfo_return[best].visual;
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_colormap = XCreateColormap(_display, RootWindow(_display, screen),
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_visual, AllocNone);
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}
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XFree(vinfo_return);
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}
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}
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Display::~Display()
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{
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while (_grab_count > 0)
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ungrab();
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XFreeModifiermap(_modmap);
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XCloseDisplay(_display);
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}
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void Display::setIgnoreErrors(bool t)
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{
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// sync up so that anything already sent is/isn't ignored!
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XSync(_display, false);
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_ignore_errors = t;
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}
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void Display::grab()
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{
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if (_grab_count == 0) {
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XGrabServer(_display);
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XSync(_display, false); // make sure it kicks in
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}
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_grab_count++;
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}
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void Display::ungrab()
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{
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if (_grab_count == 0) return;
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_grab_count--;
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if (_grab_count == 0) {
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XUngrabServer(_display);
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XFlush(_display); // ungrab as soon as possible
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}
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}
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/*
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* Grabs a button, but also grabs the button in every possible combination
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* with the keyboard lock keys, so that they do not cancel out the event.
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* if allow_scroll_lock is true then only the top half of the lock mask
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* table is used and scroll lock is ignored. This value defaults to false.
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*/
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void Display::grabButton(unsigned int button, unsigned int modifiers,
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Window grab_window, bool owner_events,
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unsigned int event_mask, int pointer_mode,
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int keyboard_mode, Window confine_to,
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Cursor cursor, bool allow_scroll_lock) const
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{
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unsigned int length = (allow_scroll_lock) ? 8 / 2:
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8;
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for (size_t cnt = 0; cnt < length; ++cnt)
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XGrabButton(_display, button, modifiers | _mask_list[cnt],
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grab_window, owner_events, event_mask, pointer_mode,
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keyboard_mode, confine_to, cursor);
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}
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/*
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* Releases the grab on a button, and ungrabs all possible combinations of the
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* keyboard lock keys.
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*/
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void Display::ungrabButton(unsigned int button, unsigned int modifiers,
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Window grab_window) const
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{
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for (size_t cnt = 0; cnt < 8; ++cnt)
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XUngrabButton(_display, button, modifiers | _mask_list[cnt],
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grab_window);
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}
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void Display::grabKey(unsigned int keycode, unsigned int modifiers,
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Window grab_window, bool owner_events,
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int pointer_mode, int keyboard_mode,
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bool allow_scroll_lock) const
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{
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unsigned int length = (allow_scroll_lock) ? 8 / 2:
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8;
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for (size_t cnt = 0; cnt < length; ++cnt)
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XGrabKey(_display, keycode, modifiers | _mask_list[cnt],
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grab_window, owner_events, pointer_mode, keyboard_mode);
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}
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void Display::ungrabKey(unsigned int keycode, unsigned int modifiers,
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Window grab_window) const
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{
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for (size_t cnt = 0; cnt < 8; ++cnt)
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XUngrabKey(_display, keycode, modifiers | _mask_list[cnt],
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grab_window);
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}
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void Display::ungrabAllKeys(Window grab_window) const
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{
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XUngrabKey(_display, AnyKey, AnyModifier, grab_window);
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}
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}
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