diff options
author | Dave Davenport <qball@gmpclient.org> | 2015-02-09 19:35:51 +0100 |
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committer | Dave Davenport <qball@gmpclient.org> | 2015-02-09 19:35:51 +0100 |
commit | 682907d3409db9c5d22314eb8fc5a0acf9d11b5a (patch) | |
tree | 9a0f8bf6d330f210a18b51e89fb0abd8b44e6976 /source/x11-helper.c | |
parent | f7eeaec60f27bf07175bfe840dfd4c45c7469563 (diff) |
Splitting over more files.
Diffstat (limited to 'source/x11-helper.c')
-rw-r--r-- | source/x11-helper.c | 544 |
1 files changed, 544 insertions, 0 deletions
diff --git a/source/x11-helper.c b/source/x11-helper.c new file mode 100644 index 00000000..00411e81 --- /dev/null +++ b/source/x11-helper.c @@ -0,0 +1,544 @@ +#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> + +#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" + +#define WINLIST 32 + +// Mask indicating num-lock. +unsigned int NumlockMask = 0; + +winlist *cache_client = NULL; +winlist *cache_xattr = NULL; + +winlist* winlist_new () +{ + winlist *l = g_malloc ( sizeof ( winlist ) ); + l->len = 0; + l->array = g_malloc_n ( WINLIST + 1, sizeof ( Window ) ); + l->data = g_malloc_n ( WINLIST + 1, sizeof ( void* ) ); + return l; +} + +int winlist_append ( winlist *l, Window w, void *d ) +{ + if ( l->len > 0 && !( l->len % WINLIST ) ) { + l->array = g_realloc ( l->array, sizeof ( Window ) * ( l->len + WINLIST + 1 ) ); + l->data = g_realloc ( l->data, sizeof ( void* ) * ( l->len + WINLIST + 1 ) ); + } + // Make clang-check happy. + // TODO: make clang-check clear this should never be 0. + if ( l->data == NULL || l->array == NULL ) { + return 0; + } + + l->data[l->len] = d; + l->array[l->len++] = w; + return l->len - 1; +} + +void winlist_empty ( winlist *l ) +{ + while ( l->len > 0 ) { + g_free ( l->data[--( l->len )] ); + } +} + +void winlist_free ( winlist *l ) +{ + if ( l != NULL ) { + winlist_empty ( l ); + g_free ( l->array ); + g_free ( l->data ); + g_free ( l ); + } +} + +int winlist_find ( winlist *l, Window w ) +{ +// iterate backwards. theory is: windows most often accessed will be +// nearer the end. testing with kcachegrind seems to support this... + int i; + + for ( i = ( l->len - 1 ); i >= 0; i-- ) { + if ( l->array[i] == w ) { + return i; + } + } + + return -1; +} + + +XWindowAttributes* window_get_attributes ( Display *display, Window w ) +{ + int idx = winlist_find ( cache_xattr, w ); + + if ( idx < 0 ) { + XWindowAttributes *cattr = g_malloc ( sizeof ( XWindowAttributes ) ); + + if ( XGetWindowAttributes ( display, w, cattr ) ) { + winlist_append ( cache_xattr, w, cattr ); + return cattr; + } + + g_free ( cattr ); + return NULL; + } + + return cache_xattr->data[idx]; +} + +// 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; +} + + +void x11_cache_create ( void ) +{ + cache_client = winlist_new (); + cache_xattr = winlist_new (); +} + +void x11_cache_empty ( void ) +{ + winlist_empty ( cache_xattr ); + winlist_empty ( cache_client ); +} + +void x11_cache_free ( void ) +{ + winlist_free ( cache_xattr ); + winlist_free ( cache_client ); +} + +// find the dimensions of the monitor displaying point x,y +static 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 ); + } +} + +// _NET_WM_STATE_* +int client_has_state ( client *c, Atom state ) +{ + for ( int i = 0; i < c->states; i++ ) { + if ( c->state[i] == state ) { + return 1; + } + } + + return 0; +} + +client* window_client ( Display *display, Window win ) +{ + if ( win == None ) { + return NULL; + } + + int idx = winlist_find ( cache_client, win ); + + if ( idx >= 0 ) { + return cache_client->data[idx]; + } + + // if this fails, we're up that creek + XWindowAttributes *attr = window_get_attributes ( display, win ); + + if ( !attr ) { + return NULL; + } + + client *c = g_malloc0 ( sizeof ( client ) ); + c->window = win; + + // copy xattr so we don't have to care when stuff is freed + memmove ( &c->xattr, attr, sizeof ( XWindowAttributes ) ); + XGetTransientForHint ( display, win, &c->trans ); + + c->states = window_get_atom_prop ( display, win, netatoms[_NET_WM_STATE], c->state, CLIENTSTATE ); + + char *name; + + if ( ( name = window_get_text_prop ( display, c->window, netatoms[_NET_WM_NAME] ) ) && name ) { + snprintf ( c->title, CLIENTTITLE, "%s", name ); + g_free ( name ); + } + else if ( XFetchName ( display, c->window, &name ) ) { + snprintf ( c->title, CLIENTTITLE, "%s", name ); + XFree ( name ); + } + + name = window_get_text_prop ( display, c->window, XInternAtom ( display, "WM_WINDOW_ROLE", False ) ); + + if ( name != NULL ) { + snprintf ( c->role, CLIENTROLE, "%s", name ); + XFree ( name ); + } + + XClassHint chint; + + if ( XGetClassHint ( display, c->window, &chint ) ) { + snprintf ( c->class, CLIENTCLASS, "%s", chint.res_class ); + snprintf ( c->name, CLIENTNAME, "%s", chint.res_name ); + XFree ( chint.res_class ); + XFree ( chint.res_name ); + } + + monitor_dimensions ( display, c->xattr.screen, c->xattr.x, c->xattr.y, &c->monitor ); + winlist_append ( cache_client, c->window, c ); + return c; +} + +/** + * @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 = window_get_attributes ( display, id ); + if ( attr != NULL ) { + 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 grab_key ( Display *display, unsigned int modmask, KeySym key ) +{ + Screen *screen = DefaultScreenOfDisplay ( display ); + Window root = RootWindow ( display, XScreenNumberOfScreen ( screen ) ); + KeyCode keycode = XKeysymToKeycode ( display, key ); + XUngrabKey ( display, keycode, AnyModifier, root ); + + if ( modmask != AnyModifier ) { + // 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 ); + } + } + else{ + // nice simple single key bind + XGrabKey ( display, keycode, AnyModifier, root, True, GrabModeAsync, GrabModeAsync ); + } +} + +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; + } + + // If no modifier mask is set, allow any modifier. + *mod = modmask ? modmask : AnyModifier; + + // 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 ) +{ + // Hack to set window opacity. + unsigned int opacity_set = ( unsigned int ) ( ( opacity / 100.0 ) * UINT32_MAX ); + XChangeProperty ( display, box, netatoms[_NET_WM_WINDOW_OPACITY], + XA_CARDINAL, 32, PropModeReplace, + ( unsigned char * ) &opacity_set, 1L ); +} + +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 display on witch the error occurred. + * @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_cache_create (); + x11_create_frequently_used_atoms ( display ); +} |