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rofi/source/x11-helper.c

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/**
* rofi
*
* MIT/X11 License
* Copyright (c) 2012 Sean Pringle <sean.pringle@gmail.com>
* Modified 2013-2015 Qball Cow <qball@gmpclient.org>
*
* 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.
*
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stdint.h>
#include <glib.h>
#include <X11/X.h>
#include <X11/Xatom.h>
#include <X11/Xlib.h>
#include <X11/Xmd.h>
#include <X11/Xutil.h>
#include <X11/Xproto.h>
#include <X11/keysym.h>
#include <X11/XKBlib.h>
#include <X11/extensions/Xinerama.h>
#include <rofi.h>
#define OVERLAP( a, b, c, d ) ( ( ( a ) == ( c ) && ( b ) == ( d ) ) || MIN ( ( a ) + ( b ), ( c ) + ( d ) ) - MAX ( ( a ), ( c ) ) > 0 )
#define INTERSECT( x, y, w, h, x1, y1, w1, h1 ) ( OVERLAP ( ( x ), ( w ), ( x1 ), ( w1 ) ) && OVERLAP ( ( y ), ( h ), ( y1 ), ( h1 ) ) )
#include "x11-helper.h"
Atom netatoms[NUM_NETATOMS];
const char *netatom_names[] = { EWMH_ATOMS ( ATOM_CHAR ) };
// Mask indicating num-lock.
unsigned int NumlockMask = 0;
// retrieve a property of any type from a window
int window_get_prop ( Display *display, Window w, Atom prop,
Atom *type, int *items,
void *buffer, unsigned int bytes )
{
int format;
unsigned long nitems, nbytes;
unsigned char *ret = NULL;
memset ( buffer, 0, bytes );
if ( XGetWindowProperty ( display, w, prop, 0, bytes / 4, False, AnyPropertyType, type,
&format, &nitems, &nbytes, &ret ) == Success && ret && *type != None && format ) {
if ( format == 8 ) {
memmove ( buffer, ret, MIN ( bytes, nitems ) );
}
if ( format == 16 ) {
memmove ( buffer, ret, MIN ( bytes, nitems * sizeof ( short ) ) );
}
if ( format == 32 ) {
memmove ( buffer, ret, MIN ( bytes, nitems * sizeof ( long ) ) );
}
*items = ( int ) nitems;
XFree ( ret );
return 1;
}
return 0;
}
// retrieve a text property from a window
// technically we could use window_get_prop(), but this is better for character set support
char* window_get_text_prop ( Display *display, Window w, Atom atom )
{
XTextProperty prop;
char *res = NULL;
char **list = NULL;
int count;
if ( XGetTextProperty ( display, w, &prop, atom ) && prop.value && prop.nitems ) {
if ( prop.encoding == XA_STRING ) {
res = g_malloc ( strlen ( ( char * ) prop.value ) + 1 );
// make clang-check happy.
if ( res ) {
strcpy ( res, ( char * ) prop.value );
}
}
else if ( Xutf8TextPropertyToTextList ( display, &prop, &list, &count ) >= Success && count > 0 && *list ) {
res = g_malloc ( strlen ( *list ) + 1 );
// make clang-check happy.
if ( res ) {
strcpy ( res, *list );
}
XFreeStringList ( list );
}
}
if ( prop.value ) {
XFree ( prop.value );
}
return res;
}
int window_get_atom_prop ( Display *display, Window w, Atom atom, Atom *list, int count )
{
Atom type;
int items;
return window_get_prop ( display, w, atom, &type, &items, list, count * sizeof ( Atom ) ) && type == XA_ATOM ? items : 0;
}
void window_set_atom_prop ( Display *display, Window w, Atom prop, Atom *atoms, int count )
{
XChangeProperty ( display, w, prop, XA_ATOM, 32, PropModeReplace, ( unsigned char * ) atoms, count );
}
int window_get_cardinal_prop ( Display *display, Window w, Atom atom, unsigned long *list, int count )
{
Atom type; int items;
return window_get_prop ( display, w, atom, &type, &items, list, count * sizeof ( unsigned long ) ) && type == XA_CARDINAL ? items : 0;
}
// find the dimensions of the monitor displaying point x,y
void monitor_dimensions ( Display *display, Screen *screen, int x, int y, workarea *mon )
{
memset ( mon, 0, sizeof ( workarea ) );
mon->w = WidthOfScreen ( screen );
mon->h = HeightOfScreen ( screen );
// locate the current monitor
if ( XineramaIsActive ( display ) ) {
int monitors;
XineramaScreenInfo *info = XineramaQueryScreens ( display, &monitors );
if ( info ) {
for ( int i = 0; i < monitors; i++ ) {
if ( INTERSECT ( x, y, 1, 1, info[i].x_org, info[i].y_org, info[i].width, info[i].height ) ) {
mon->x = info[i].x_org;
mon->y = info[i].y_org;
mon->w = info[i].width;
mon->h = info[i].height;
break;
}
}
}
XFree ( info );
}
}
/**
* @param x The x position of the mouse [out]
* @param y The y position of the mouse [out]
*
* find mouse pointer location
*
* @returns 1 when found
*/
static int pointer_get ( Display *display, Window root, int *x, int *y )
{
*x = 0;
*y = 0;
Window rr, cr;
int rxr, ryr, wxr, wyr;
unsigned int mr;
if ( XQueryPointer ( display, root, &rr, &cr, &rxr, &ryr, &wxr, &wyr, &mr ) ) {
*x = rxr;
*y = ryr;
return 1;
}
return 0;
}
// determine which monitor holds the active window, or failing that the mouse pointer
void monitor_active ( Display *display, workarea *mon )
{
Screen *screen = DefaultScreenOfDisplay ( display );
Window root = RootWindow ( display, XScreenNumberOfScreen ( screen ) );
int x, y;
Window id;
Atom type;
int count;
if ( window_get_prop ( display, root, netatoms[_NET_ACTIVE_WINDOW], &type, &count, &id, sizeof ( Window ) )
&& type == XA_WINDOW && count > 0 ) {
XWindowAttributes attr;
if ( XGetWindowAttributes ( display, id, &attr ) ) {
Window junkwin;
if ( XTranslateCoordinates ( display, id, attr.root,
-attr.border_width,
-attr.border_width,
&x, &y, &junkwin ) == True ) {
monitor_dimensions ( display, screen, x, y, mon );
return;
}
}
}
if ( pointer_get ( display, root, &x, &y ) ) {
monitor_dimensions ( display, screen, x, y, mon );
return;
}
monitor_dimensions ( display, screen, 0, 0, mon );
}
int window_send_message ( Display *display, Window target,
Window subject, Atom atom,
unsigned long protocol, unsigned long mask, Time time )
{
XEvent e;
memset ( &e, 0, sizeof ( XEvent ) );
e.xclient.type = ClientMessage;
e.xclient.message_type = atom;
e.xclient.window = subject;
e.xclient.data.l[0] = protocol;
e.xclient.data.l[1] = time;
e.xclient.send_event = True;
e.xclient.format = 32;
int r = XSendEvent ( display, target, False, mask, &e ) ? 1 : 0;
XFlush ( display );
return r;
}
int take_keyboard ( Display *display, Window w )
{
if ( XGrabKeyboard ( display, w, True, GrabModeAsync, GrabModeAsync, CurrentTime ) == GrabSuccess ) {
return 1;
}
return 0;
}
void release_keyboard ( Display *display )
{
XUngrabKeyboard ( display, CurrentTime );
}
// bind a key combination on a root window, compensating for Lock* states
void x11_grab_key ( Display *display, unsigned int modmask, KeySym key )
{
Screen *screen = DefaultScreenOfDisplay ( display );
Window root = RootWindow ( display, XScreenNumberOfScreen ( screen ) );
KeyCode keycode = XKeysymToKeycode ( display, key );
// bind to combinations of mod and lock masks, so caps and numlock don't confuse people
XGrabKey ( display, keycode, modmask, root, True, GrabModeAsync, GrabModeAsync );
XGrabKey ( display, keycode, modmask | LockMask, root, True, GrabModeAsync, GrabModeAsync );
if ( NumlockMask ) {
XGrabKey ( display, keycode, modmask | NumlockMask, root, True, GrabModeAsync, GrabModeAsync );
XGrabKey ( display, keycode, modmask | NumlockMask | LockMask, root, True, GrabModeAsync, GrabModeAsync );
}
}
/**
* @param display The connection to the X server.
*
* Figure out what entry in the modifiermap is NumLock.
* This sets global variable: NumlockMask
*/
static void x11_figure_out_numlock_mask ( Display *display )
{
XModifierKeymap *modmap = XGetModifierMapping ( display );
KeyCode kc = XKeysymToKeycode ( display, XK_Num_Lock );
for ( int i = 0; i < 8; i++ ) {
for ( int j = 0; j < ( int ) modmap->max_keypermod; j++ ) {
if ( modmap->modifiermap[i * modmap->max_keypermod + j] == kc ) {
NumlockMask = ( 1 << i );
}
}
}
XFreeModifiermap ( modmap );
}
// convert a Mod+key arg to mod mask and keysym
void x11_parse_key ( char *combo, unsigned int *mod, KeySym *key )
{
unsigned int modmask = 0;
if ( strcasestr ( combo, "shift" ) ) {
modmask |= ShiftMask;
}
if ( strcasestr ( combo, "control" ) ) {
modmask |= ControlMask;
}
if ( strcasestr ( combo, "mod1" ) ) {
modmask |= Mod1Mask;
}
if ( strcasestr ( combo, "alt" ) ) {
modmask |= Mod1Mask;
}
if ( strcasestr ( combo, "mod2" ) ) {
modmask |= Mod2Mask;
}
if ( strcasestr ( combo, "mod3" ) ) {
modmask |= Mod3Mask;
}
if ( strcasestr ( combo, "mod4" ) ) {
modmask |= Mod4Mask;
}
if ( strcasestr ( combo, "mod5" ) ) {
modmask |= Mod5Mask;
}
*mod = modmask;
// Skip modifier (if exist) and parse key.
char i = strlen ( combo );
while ( i > 0 && !strchr ( "-+", combo[i - 1] ) ) {
i--;
}
KeySym sym = XStringToKeysym ( combo + i );
if ( sym == NoSymbol || ( !modmask && ( strchr ( combo, '-' ) || strchr ( combo, '+' ) ) ) ) {
fprintf ( stderr, "sorry, cannot understand key combination: %s\n", combo );
exit ( EXIT_FAILURE );
}
*key = sym;
}
void x11_set_window_opacity ( Display *display, Window box, unsigned int opacity )
{
// Scale 0-100 to 0 - UINT32_MAX.
unsigned int opacity_set = ( unsigned int ) ( ( opacity / 100.0 ) * UINT32_MAX );
// Set opacity.
XChangeProperty ( display, box, netatoms[_NET_WM_WINDOW_OPACITY],
XA_CARDINAL, 32, PropModeReplace,
( unsigned char * ) &opacity_set, 1L );
}
/**
* @param display The connection to the X server.
*
* Fill in the list of Atoms.
*/
static void x11_create_frequently_used_atoms ( Display *display )
{
// X atom values
for ( int i = 0; i < NUM_NETATOMS; i++ ) {
netatoms[i] = XInternAtom ( display, netatom_names[i], False );
}
}
static int ( *xerror )( Display *, XErrorEvent * );
/**
* @param d The connection to the X server.
* @param ee The XErrorEvent
*
* X11 Error handler.
*/
static int display_oops ( Display *d, XErrorEvent *ee )
{
if ( ee->error_code == BadWindow
|| ( ee->request_code == X_GrabButton && ee->error_code == BadAccess )
|| ( ee->request_code == X_GrabKey && ee->error_code == BadAccess )
) {
return 0;
}
fprintf ( stderr, "error: request code=%d, error code=%d\n", ee->request_code, ee->error_code );
return xerror ( d, ee );
}
void x11_setup ( Display *display )
{
// Set error handle
XSync ( display, False );
xerror = XSetErrorHandler ( display_oops );
XSync ( display, False );
// determine numlock mask so we can bind on keys with and without it
x11_figure_out_numlock_mask ( display );
x11_create_frequently_used_atoms ( display );
}
extern Colormap map;
extern XVisualInfo vinfo;
int truecolor = FALSE;
void create_visual_and_colormap ( Display *display )
{
int screen = DefaultScreen ( display );
// Try to create TrueColor map
if ( XMatchVisualInfo ( display, screen, 32, TrueColor, &vinfo ) ) {
// Visual found, lets try to create map.
map = XCreateColormap ( display, DefaultRootWindow ( display ), vinfo.visual, AllocNone );
truecolor = TRUE;
}
// Failed to create map.
// Use the defaults then.
if ( map == None ) {
truecolor = FALSE;
// Two fields we use.
vinfo.visual = DefaultVisual ( display, screen );
vinfo.depth = DefaultDepth ( display, screen );
map = DefaultColormap ( display, screen );
}
}
unsigned int color_get ( Display *display, const char *const name )
{
XColor color = { 0, 0, 0, 0, 0, 0 };
// Special format.
if ( strncmp ( name, "argb:", 5 ) == 0 ) {
color.pixel = strtoul ( &name[5], NULL, 16 );
color.red = ( ( color.pixel & 0x00FF0000 ) >> 16 ) * 255;
color.green = ( ( color.pixel & 0x0000FF00 ) >> 8 ) * 255;
color.blue = ( ( color.pixel & 0x000000FF ) ) * 255;
if ( !truecolor ) {
// This will drop alpha part.
return XAllocColor ( display, map, &color ) ? color.pixel : None;
}
return color.pixel;
}
else {
return XAllocNamedColor ( display, map, name, &color, &color ) ? color.pixel : None;
}
}
unsigned int color_background ( Display *display )
{
if ( !config.color_enabled ) {
return color_get ( display, config.menu_bg );
}
else {
unsigned int retv = 0;
gchar **vals = g_strsplit ( config.color_window, ",", 2 );
if ( vals != NULL && vals[0] != NULL ) {
retv = color_get ( display, vals[0] );
}
g_strfreev ( vals );
return retv;
}
}
unsigned int color_border ( Display *display )
{
if ( !config.color_enabled ) {
return color_get ( display, config.menu_bc );
}
else {
unsigned int retv = 0;
gchar **vals = g_strsplit ( config.color_window, ",", 2 );
if ( vals != NULL && vals[0] != NULL && vals[1] != NULL ) {
retv = color_get ( display, vals[1] );
}
g_strfreev ( vals );
return retv;
}
}
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