Framer

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/* $Id$ */
/* Copyright (c) 2009 Pierre Pronchery <khorben@defora.org> */
/* This file is part of DeforaOS Desktop Framer */
/* 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, 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 <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <gtk/gtk.h>
#include <gdk/gdkx.h>
#include <X11/Xatom.h>
#include "framer.h"
#include "../config.h"
#define max(a, b) ((a) > (b) ? (a) : (b))
#define min(a, b) ((a) < (b) ? (a) : (b))
/* Framer */
/* private */
/* types */
typedef enum _FramerAtom
{
FA_NET_ACTIVE_WINDOW = 0,
FA_NET_CLIENT_LIST,
FA_NET_CURRENT_DESKTOP,
FA_NET_DESKTOP_GEOMETRY,
FA_NET_DESKTOP_VIEWPORT,
FA_NET_NUMBER_OF_DESKTOPS,
FA_NET_SHOWING_DESKTOP,
FA_NET_SUPPORTED,
FA_NET_WM_STATE,
FA_NET_WM_STATE_ADD,
FA_NET_WM_STATE_FULLSCREEN,
FA_NET_WM_STATE_REMOVE,
FA_NET_WM_STATE_TOGGLE,
FA_NET_WM_WINDOW_TYPE,
FA_NET_WM_WINDOW_TYPE_DESKTOP,
FA_NET_WM_WINDOW_TYPE_DOCK,
FA_NET_WM_WINDOW_TYPE_NORMAL,
FA_NET_WORKAREA
} FramerAtom;
#define FA_LAST FA_NET_WORKAREA
#define FA_COUNT (FA_LAST + 1)
#define FA_NET_WM_WINDOW_TYPE_FIRST FA_NET_WM_WINDOW_TYPE_DESKTOP
#define FA_NET_WM_WINDOW_TYPE_LAST FA_NET_WM_WINDOW_TYPE_NORMAL
struct _Framer
{
/* essential */
GdkDisplay * display;
GdkScreen * screen;
GdkWindow * root;
/* screen */
int width;
int height;
/* atoms */
Atom atom[FA_COUNT];
/* client list */
Window * window;
size_t window_cnt;
};
/* constants */
static char const * _framer_atom[FA_COUNT] =
{
"_NET_ACTIVE_WINDOW",
"_NET_CLIENT_LIST",
"_NET_CURRENT_DESKTOP",
"_NET_DESKTOP_GEOMETRY",
"_NET_DESKTOP_VIEWPORT",
"_NET_NUMBER_OF_DESKTOPS",
"_NET_SHOWING_DESKTOP",
"_NET_SUPPORTED",
"_NET_WM_STATE",
"_NET_WM_STATE_ADD",
"_NET_WM_STATE_FULLSCREEN",
"_NET_WM_STATE_REMOVE",
"_NET_WM_STATE_TOGGLE",
"_NET_WM_WINDOW_TYPE",
"_NET_WM_WINDOW_TYPE_DESKTOP",
"_NET_WM_WINDOW_TYPE_DOCK",
"_NET_WM_WINDOW_TYPE_NORMAL",
"_NET_WORKAREA"
};
/* prototypes */
static int _framer_error(char const * message, int ret);
static int _framer_window_get_property(Framer * framer, Window window,
FramerAtom property, Atom atom, unsigned long * cnt,
unsigned char ** ret);
static int _framer_window_is_manageable(Framer * framer, Window window);
static int _framer_window_set_property(Framer * framer, Window window,
FramerAtom property, Atom atom, unsigned long cnt,
unsigned char * data);
/* callbacks */
static GdkFilterReturn _framer_filter(GdkXEvent * xevent, GdkEvent * event,
gpointer data);
/* public */
/* functions */
/* framer_new */
static void _new_atoms(Framer * framer);
static void _new_windows(Framer * framer);
static void _new_ewmh(Framer * framer);
Framer * framer_new(void)
{
Framer * framer;
if((framer = malloc(sizeof(*framer))) == NULL)
{
_framer_error(strerror(errno), 1);
return NULL;
}
if((framer->display = gdk_display_get_default()) == NULL)
{
_framer_error("There is no default display", 1);
free(framer);
return NULL;
}
framer->screen = gdk_display_get_default_screen(framer->display);
framer->root = gdk_screen_get_root_window(framer->screen);
framer->width = gdk_screen_get_width(framer->screen);
framer->height = gdk_screen_get_height(framer->screen);
_new_atoms(framer);
_new_windows(framer);
_new_ewmh(framer);
/* register as window manager */
XSelectInput(gdk_x11_display_get_xdisplay(framer->display),
GDK_WINDOW_XWINDOW(framer->root), NoEventMask
| SubstructureNotifyMask
| SubstructureRedirectMask);
gdk_window_add_filter(NULL, _framer_filter, framer);
return framer;
}
static void _new_atoms(Framer * framer)
{
size_t i;
for(i = 0; i < FA_COUNT; i++)
framer->atom[i] = gdk_x11_get_xatom_by_name_for_display(
framer->display, _framer_atom[i]);
}
static void _new_windows(Framer * framer)
{
Window root;
Window parent;
Window * children = NULL;
unsigned int nchildren = 0;
unsigned int i;
framer->window = NULL;
framer->window_cnt = 0;
if(XQueryTree(GDK_DISPLAY_XDISPLAY(framer->display),
GDK_WINDOW_XWINDOW(framer->root), &root,
&parent, &children, &nchildren) == 0)
{
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s() failed\n", __func__);
#endif
return;
}
for(i = 0; i < nchildren; i++)
framer_window_add(framer, children[i]);
XFree(children);
}
static void _new_ewmh(Framer * framer)
{
long data[4];
size_t i;
Atom type = XA_CARDINAL;
unsigned char * p = (unsigned char *)&data;
long cnt = 0;
memset(&data, 0, sizeof(data));
for(i = 0; i < FA_COUNT; i++)
{
switch(i)
{
case FA_NET_ACTIVE_WINDOW:
type = XA_WINDOW;
data[0] = None;
cnt = 1;
break;
case FA_NET_CLIENT_LIST:
type = XA_WINDOW;
p = (unsigned char *)framer->window;
cnt = framer->window_cnt;
break;
case FA_NET_CURRENT_DESKTOP:
cnt = 1;
break;
case FA_NET_NUMBER_OF_DESKTOPS:
data[0] = 1;
cnt = 1;
break;
case FA_NET_DESKTOP_GEOMETRY:
data[0] = framer->width;
data[1] = framer->height;
cnt = 2;
break;
case FA_NET_DESKTOP_VIEWPORT:
cnt = 2;
break;
case FA_NET_SUPPORTED:
type = XA_ATOM;
p = (unsigned char *)framer->atom;
cnt = FA_COUNT;
break;
case FA_NET_WORKAREA:
data[2] = framer->width;
data[3] = max(framer->height - 64, 1);
cnt = 4;
break;
default:
continue;
}
_framer_window_set_property(framer, GDK_WINDOW_XWINDOW(
framer->root), i, type, cnt, p);
type = XA_CARDINAL;
cnt = 0;
memset(&data, 0, sizeof(data));
p = (unsigned char *)&data;
}
}
/* framer_delete */
void framer_delete(Framer * framer)
{
int i;
for(i = 0; i < FA_COUNT; i++)
XDeleteProperty(GDK_DISPLAY_XDISPLAY(framer->display),
GDK_WINDOW_XWINDOW(framer->root),
framer->atom[i]);
free(framer);
}
/* accessors */
/* framer_set_show_desktop */
void framer_set_show_desktop(Framer * framer, gboolean shown)
{
size_t i;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s(%s)\n", __func__, shown ? "TRUE" : "FALSE");
#endif
if(shown != TRUE)
return;
for(i = 0; i < framer->window_cnt; i++)
framer_window_iconify(framer, framer->window[i]);
}
/* framer_window_is_fullscreen */
int framer_window_is_fullscreen(Framer * framer, Window window,
gboolean * fullscreen)
{
XWindowAttributes wa;
gdk_error_trap_push();
XGetWindowAttributes(GDK_DISPLAY_XDISPLAY(framer->display), window,
&wa);
if(gdk_error_trap_pop() != 0)
return 1;
*fullscreen = (wa.x == 0 && wa.y == 0 && wa.height == framer->height
&& wa.width == framer->width) ? TRUE : FALSE;
return 0;
}
/* framer_window_set_active */
int framer_window_set_active(Framer * framer, Window window)
{
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s(%d)\n", __func__, (int)window);
#endif
XMapRaised(GDK_DISPLAY_XDISPLAY(framer->display), window);
return _framer_window_set_property(framer, window, FA_NET_ACTIVE_WINDOW,
XA_WINDOW, 1, (unsigned char *)&window);
}
/* framer_window_set_fullscreen */
int framer_window_set_fullscreen(Framer * framer, Window window,
gboolean fullscreen)
{
XWindowChanges wc;
unsigned long mask = 0;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s(%s)\n", __func__, fullscreen ? "TRUE"
: "FALSE");
#endif
memset(&wc, 0, sizeof(wc));
if(fullscreen == TRUE)
{
wc.width = framer->width;
wc.height = framer->height;
mask |= CWX | CWY | CWHeight | CWWidth;
}
else
#ifdef EMBEDDED
{
wc.width = framer->width;
wc.height = framer->height - 64;
mask |= CWX | CWY | CWHeight | CWWidth;
}
#else
return 1; /* FIXME implement */
#endif
gdk_error_trap_push();
XConfigureWindow(GDK_DISPLAY_XDISPLAY(framer->display), window,
mask, &wc);
if(gdk_error_trap_pop() != 0)
return 1;
return 0;
}
/* useful */
/* framer_window_add */
int framer_window_add(Framer * framer, Window window)
{
size_t i;
Window * p;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s(%d)\n", __func__, (int)window);
#endif
if(!_framer_window_is_manageable(framer, window))
return 0;
for(i = 0; i < framer->window_cnt; i++)
if(framer->window[i] == window)
return 0;
if((p = realloc(framer->window, sizeof(*p) * (framer->window_cnt + 1)))
== NULL)
return -1;
framer->window = p;
p = &framer->window[framer->window_cnt++];
*p = window;
_framer_window_set_property(framer, GDK_WINDOW_XWINDOW(framer->root),
FA_NET_CLIENT_LIST, XA_WINDOW, framer->window_cnt,
(unsigned char *)framer->window);
return 0;
}
/* framer_window_iconify */
int framer_window_iconify(Framer * framer, Window window)
{
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s(%d)\n", __func__, (int)window);
#endif
gdk_error_trap_push();
XUnmapWindow(GDK_DISPLAY_XDISPLAY(framer->display), window);
if(gdk_error_trap_pop() != 0)
return 1;
return 0;
}
/* framer_window_remove */
int framer_window_remove(Framer * framer, Window window)
{
size_t i;
Window * p;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s(%d)\n", __func__, (int)window);
#endif
for(i = 0; i < framer->window_cnt; i++)
if(framer->window[i] == window)
break;
if(i == framer->window_cnt) /* we don't know this window anyway */
return 0;
memmove(&framer->window[i], &framer->window[i + 1],
(--framer->window_cnt - i) * sizeof(*p));
if((p = realloc(framer->window, framer->window_cnt * sizeof(*p)))
!= NULL) /* we can ignore errors */
framer->window = p;
_framer_window_set_property(framer, GDK_WINDOW_XWINDOW(framer->root),
FA_NET_CLIENT_LIST, XA_WINDOW, framer->window_cnt,
(unsigned char *)framer->window);
return 0;
}
/* private */
/* functions */
/* framer_error */
static int _framer_error(char const * message, int ret)
{
fprintf(stderr, "%s: %s\n", PACKAGE, message);
return ret;
}
/* framer_window_get_property */
static int _framer_window_get_property(Framer * framer, Window window,
FramerAtom property, Atom atom, unsigned long * cnt,
unsigned char ** ret)
{
int res;
Atom type;
int format;
unsigned long bytes;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s(%d, %s, %lu)\n", __func__, (int)window,
_framer_atom[property], atom);
#endif
gdk_error_trap_push();
res = XGetWindowProperty(GDK_DISPLAY_XDISPLAY(framer->display), window,
framer->atom[property], 0, G_MAXLONG, False, atom,
&type, &format, cnt, &bytes, ret);
if(gdk_error_trap_pop() != 0 || res != Success)
return 1;
if(type != atom)
{
if(*ret != NULL)
XFree(*ret);
*ret = NULL;
return 1;
}
return 0;
}
/* framer_window_is_manageable */
static int _framer_window_is_manageable(Framer * framer, Window window)
{
Atom typehint;
Atom * p = NULL;
unsigned long cnt = 0;
if(_framer_window_get_property(framer, window, FA_NET_WM_WINDOW_TYPE,
XA_ATOM, &cnt, (void*)&p) != 0)
return 0;
typehint = *p;
XFree(p);
return typehint == framer->atom[FA_NET_WM_WINDOW_TYPE_NORMAL] ? 1 : 0;
}
/* framer_window_set_property */
static int _framer_window_set_property(Framer * framer, Window window,
FramerAtom property, Atom atom, unsigned long cnt,
unsigned char * data)
{
int res;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s(%d, %s, %lu, %lu)\n", __func__,
(int)window, _framer_atom[property], atom, cnt);
#endif
gdk_error_trap_push();
res = XChangeProperty(GDK_DISPLAY_XDISPLAY(framer->display), window,
framer->atom[property], atom, 32, PropModeReplace,
data, cnt);
if(gdk_error_trap_pop() != 0 || res != Success)
return 1;
return 0;
}
/* callbacks */
/* framer_filter */
static GdkFilterReturn _filter_client_message(XClientMessageEvent * xclient,
Framer * framer);
static GdkFilterReturn _filter_configure_notify(XConfigureEvent * xconfigure);
static GdkFilterReturn _filter_configure_request(
XConfigureRequestEvent * xconfigure, Framer * framer);
static GdkFilterReturn _filter_create_notify(XCreateWindowEvent * xcreate,
Framer * framer);
static GdkFilterReturn _filter_destroy_notify(XDestroyWindowEvent * xdestroy,
Framer * framer);
static GdkFilterReturn _filter_leave_notify(XCrossingEvent * xleave);
static GdkFilterReturn _filter_map_notify(XMapEvent * xmap);
static GdkFilterReturn _filter_map_request(XMapRequestEvent * xmap);
static GdkFilterReturn _filter_motion_notify(XMotionEvent * xmotion);
static GdkFilterReturn _filter_property_notify(XPropertyEvent * xproperty,
Framer * framer);
static GdkFilterReturn _filter_unmap_notify(XUnmapEvent * xunmap);
static GdkFilterReturn _framer_filter(GdkXEvent * xevent, GdkEvent * event,
gpointer data)
{
Framer * framer = data;
XEvent * xev = xevent;
switch(xev->type)
{
case ClientMessage:
return _filter_client_message(&xev->xclient, framer);
case ConfigureNotify:
return _filter_configure_notify(&xev->xconfigure);
case ConfigureRequest:
return _filter_configure_request(
&xev->xconfigurerequest, framer);
case CreateNotify:
return _filter_create_notify(&xev->xcreatewindow,
framer);
case DestroyNotify:
return _filter_destroy_notify(&xev->xdestroywindow,
framer);
case LeaveNotify:
return _filter_leave_notify(&xev->xcrossing);
case MapNotify:
return _filter_map_notify(&xev->xmap);
case MapRequest:
return _filter_map_request(&xev->xmaprequest);
case MotionNotify:
return _filter_motion_notify(&xev->xmotion);
case PropertyNotify:
return _filter_property_notify(&xev->xproperty,
framer);
case UnmapNotify:
return _filter_unmap_notify(&xev->xunmap);
default:
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s() type=%d\n", __func__,
xev->type);
#endif
break;
}
return GDK_FILTER_CONTINUE;
}
static void _message_state(Framer * framer, Window window, unsigned long hint,
unsigned long property);
static GdkFilterReturn _filter_client_message(XClientMessageEvent * xclient,
Framer * framer)
{
GdkAtom atom;
size_t i;
char const * name;
char * p = NULL;
for(i = 0; i < FA_COUNT; i++)
if(xclient->message_type == framer->atom[i])
break;
switch(i)
{
case FA_NET_ACTIVE_WINDOW:
framer_window_set_active(framer, xclient->window);
break;
case FA_NET_SHOWING_DESKTOP:
framer_set_show_desktop(framer, TRUE);
break;
case FA_NET_WM_STATE:
_message_state(framer, xclient->window,
xclient->data.l[0], xclient->data.l[1]);
_message_state(framer, xclient->window,
xclient->data.l[0], xclient->data.l[2]);
break;
default:
if(i < FA_COUNT)
name = _framer_atom[i];
else
{
atom = gdk_x11_xatom_to_atom_for_display(
framer->display,
xclient->message_type);
p = gdk_atom_name(atom);
name = p;
}
fprintf(stderr, "%s: %s: %s\n", PACKAGE, name,
"Unsupported message");
if(p != NULL)
g_free(p);
break;
}
return GDK_FILTER_CONTINUE;
}
static void _message_state(Framer * framer, Window window, unsigned long hint,
unsigned long property)
{
int i;
gboolean enabled;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s(%ld, %ld)\n", __func__, hint, property);
#endif
if(property == 0)
return;
for(i = 0; i < FA_COUNT; i++)
if(framer->atom[i] == property)
break;
switch(i)
{
case FA_NET_WM_STATE_FULLSCREEN:
if(hint == framer->atom[FA_NET_WM_STATE_ADD])
enabled = TRUE;
else if(hint == framer->atom[FA_NET_WM_STATE_REMOVE])
enabled = FALSE;
else /* assume toggle */
{
if(framer_window_is_fullscreen(framer, window,
&enabled) != 0)
break;
enabled = !enabled;
}
framer_window_set_fullscreen(framer, window, enabled);
break;
}
}
static GdkFilterReturn _filter_configure_notify(XConfigureEvent * xconfigure)
{
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
return GDK_FILTER_CONTINUE;
}
static GdkFilterReturn _filter_configure_request(
XConfigureRequestEvent * xconfigure, Framer * framer)
{
FramerAtom type = FA_NET_WM_WINDOW_TYPE_NORMAL;
Atom typehint;
Atom * p;
unsigned long cnt = 0;
int i;
XWindowChanges wc;
unsigned long mask = xconfigure->value_mask;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s() (%d,%d) %dx%d %lu\n", __func__,
xconfigure->x, xconfigure->y, xconfigure->width,
xconfigure->height, xconfigure->value_mask);
#endif
if(_framer_window_get_property(framer, xconfigure->window,
FA_NET_WM_WINDOW_TYPE, XA_ATOM, &cnt, (void*)&p) == 0)
{
typehint = *p;
XFree(p);
for(i = FA_NET_WM_WINDOW_TYPE_FIRST;
i < FA_NET_WM_WINDOW_TYPE_LAST; i++)
if(typehint == framer->atom[i])
{
type = i;
break;
}
}
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s() %s\n", __func__, _framer_atom[type]);
#endif
memset(&wc, 0, sizeof(wc));
#ifndef EMBEDDED
if(xconfigure->value_mask & CWX)
wc.x = max(xconfigure->x, 0);
if(xconfigure->value_mask & CWY)
wc.y = max(xconfigure->y, 0);
if(xconfigure->value_mask & CWWidth)
wc.width = min(xconfigure->width, framer->width);
if(xconfigure->value_mask & CWHeight)
wc.height = min(xconfigure->height, framer->height - 64);
#else
if(type == FA_NET_WM_WINDOW_TYPE_DOCK)
{
wc.x = xconfigure->x;
wc.y = xconfigure->y;
wc.width = xconfigure->width;
wc.height = xconfigure->height;
}
else
{
wc.x = 0;
wc.width = framer->width;
wc.y = 0;
wc.height = framer->height - 64;
mask |= CWX | CWWidth | CWY | CWHeight;
}
if(xconfigure->value_mask & CWBorderWidth)
wc.border_width = 0;
#endif
gdk_error_trap_push();
XConfigureWindow(xconfigure->display, xconfigure->window, mask, &wc);
gdk_error_trap_pop();
return GDK_FILTER_CONTINUE;
}
static GdkFilterReturn _filter_create_notify(XCreateWindowEvent * xcreate,
Framer * framer)
{
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
framer_window_add(framer, xcreate->window);
return GDK_FILTER_CONTINUE;
}
static GdkFilterReturn _filter_destroy_notify(XDestroyWindowEvent * xdestroy,
Framer * framer)
{
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
framer_window_remove(framer, xdestroy->window);
return GDK_FILTER_CONTINUE;
}
static GdkFilterReturn _filter_leave_notify(XCrossingEvent * xleave)
{
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
return GDK_FILTER_CONTINUE;
}
static GdkFilterReturn _filter_map_notify(XMapEvent * xmap)
{
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
return GDK_FILTER_CONTINUE;
}
static GdkFilterReturn _filter_map_request(XMapRequestEvent * xmap)
{
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
gdk_error_trap_push();
XMapWindow(xmap->display, xmap->window);
gdk_error_trap_pop(); /* we ignore errors */
return GDK_FILTER_CONTINUE;
}
static GdkFilterReturn _filter_motion_notify(XMotionEvent * xmotion)
{
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
return GDK_FILTER_CONTINUE;
}
static GdkFilterReturn _filter_property_notify(XPropertyEvent * xproperty,
Framer * framer)
{
GdkAtom atom;
char * name;
atom = gdk_x11_xatom_to_atom_for_display(framer->display,
xproperty->atom);
name = gdk_atom_name(atom);
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s() %s, %s\n", __func__, name,
xproperty->send_event ? "TRUE" : "FALSE");
#endif
g_free(name);
return GDK_FILTER_CONTINUE;
}
static GdkFilterReturn _filter_unmap_notify(XUnmapEvent * xunmap)
{
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
return GDK_FILTER_CONTINUE;
}