mutter/src/screen.c

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/* Metacity X screen handler */
/*
* Copyright (C) 2001 Havoc Pennington
*
* 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; either version 2 of the
* License, or (at your option) any later version.
*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
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#include "screen.h"
#include "util.h"
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#include "errors.h"
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#include "window.h"
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#include "colors.h"
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#include "uislave.h"
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#include "frame.h"
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#include "workspace.h"
#include "keybindings.h"
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#include <X11/cursorfont.h>
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#include <locale.h>
#include <string.h>
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static void ui_slave_func (MetaUISlave *uislave,
MetaMessage *message,
gpointer data);
static char* get_screen_name (MetaDisplay *display,
int number);
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MetaScreen*
meta_screen_new (MetaDisplay *display,
int number)
{
MetaScreen *screen;
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Window xroot;
Display *xdisplay;
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Cursor cursor;
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XGCValues vals;
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/* Only display->name, display->xdisplay, and display->error_traps
* can really be used in this function, since normally screens are
* created from the MetaDisplay constructor
*/
xdisplay = display->xdisplay;
meta_verbose ("Trying screen %d on display '%s'\n",
number, display->name);
xroot = RootWindow (xdisplay, number);
/* FVWM checks for None here, I don't know if this
* ever actually happens
*/
if (xroot == None)
{
meta_warning (_("Screen %d on display '%s' is invalid\n"),
number, display->name);
return NULL;
}
/* Select our root window events */
meta_error_trap_push (display);
XSelectInput (xdisplay,
xroot,
SubstructureRedirectMask | SubstructureNotifyMask |
ColormapChangeMask | PropertyChangeMask |
LeaveWindowMask | EnterWindowMask |
ButtonPressMask | ButtonReleaseMask);
if (meta_error_trap_pop (display) != Success)
{
meta_warning (_("Screen %d on display '%s' already has a window manager\n"),
number, display->name);
return NULL;
}
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cursor = XCreateFontCursor (display->xdisplay, XC_left_ptr);
XDefineCursor (display->xdisplay, xroot, cursor);
XFreeCursor (display->xdisplay, cursor);
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screen = g_new (MetaScreen, 1);
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screen->display = display;
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screen->number = number;
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screen->screen_name = get_screen_name (display, number);
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screen->xscreen = ScreenOfDisplay (xdisplay, number);
screen->xroot = xroot;
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screen->pango_context = NULL;
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screen->engine = &meta_default_engine;
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screen->showing_tooltip = FALSE;
/* Screens must have at least one workspace at all times,
* so create that required workspace.
*/
screen->active_workspace = meta_workspace_new (screen);
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/* FIXME, for now there are always 6 workspaces... */
meta_workspace_new (screen);
meta_workspace_new (screen);
meta_workspace_new (screen);
meta_workspace_new (screen);
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meta_workspace_new (screen);
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meta_screen_init_visual_info (screen);
meta_screen_init_ui_colors (screen);
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meta_screen_grab_keys (screen);
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screen->scratch_gc = XCreateGC (screen->display->xdisplay,
screen->xroot,
0,
&vals);
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screen->uislave = meta_ui_slave_new (screen->screen_name,
ui_slave_func,
screen);
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meta_verbose ("Added screen %d ('%s') root 0x%lx\n",
screen->number, screen->screen_name, screen->xroot);
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return screen;
}
void
meta_screen_free (MetaScreen *screen)
{
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meta_screen_ungrab_keys (screen);
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meta_ui_slave_free (screen->uislave);
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XFreeGC (screen->display->xdisplay,
screen->scratch_gc);
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if (screen->pango_context)
g_object_unref (G_OBJECT (screen->pango_context));
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g_free (screen->screen_name);
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g_free (screen);
}
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void
meta_screen_manage_all_windows (MetaScreen *screen)
{
Window ignored1, ignored2;
Window *children;
unsigned int n_children;
int i;
/* Must grab server to avoid obvious race condition */
meta_display_grab (screen->display);
meta_error_trap_push (screen->display);
XQueryTree (screen->display->xdisplay,
screen->xroot,
&ignored1, &ignored2, &children, &n_children);
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if (meta_error_trap_pop (screen->display))
{
meta_display_ungrab (screen->display);
return;
}
i = 0;
while (i < n_children)
{
meta_window_new (screen->display, children[i]);
++i;
}
meta_display_ungrab (screen->display);
if (children)
XFree (children);
}
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static GC
get_gc_func (PangoContext *context, PangoColor *color, GC base_gc)
{
MetaScreen *screen;
GC new_gc;
XGCValues vals;
int copy_mask = (GCFunction | GCPlaneMask | GCForeground | GCBackground |
GCLineWidth | GCLineStyle | GCCapStyle | GCJoinStyle |
GCFillStyle | GCFillRule | GCTile | GCStipple | GCTileStipXOrigin |
GCTileStipYOrigin | GCFont | GCSubwindowMode |
GCGraphicsExposures | GCClipXOrigin | GCClipYOrigin |
GCDashOffset | GCArcMode);
screen = g_object_get_data (G_OBJECT (context), "meta-screen");
new_gc = XCreateGC (screen->display->xdisplay,
screen->xroot,
0,
&vals);
XCopyGC (screen->display->xdisplay, base_gc, copy_mask, new_gc);
vals.foreground = meta_screen_get_x_pixel (screen, color);
XChangeGC (screen->display->xdisplay, new_gc, GCForeground, &vals);
return new_gc;
}
static void
free_gc_func (PangoContext *context, GC gc)
{
MetaScreen *screen;
screen = g_object_get_data (G_OBJECT (context), "meta-screen");
XFreeGC (screen->display->xdisplay, gc);
}
static char*
get_default_language (void)
{
/* Copied from GTK, Copyright 2001 Red Hat Inc. */
gchar *lang;
gchar *p;
lang = g_strdup (setlocale (LC_CTYPE, NULL));
p = strchr (lang, '.');
if (p)
*p = '\0';
p = strchr (lang, '@');
if (p)
*p = '\0';
return lang;
}
PangoContext*
meta_screen_get_pango_context (MetaScreen *screen,
const PangoFontDescription *desc,
PangoDirection direction)
{
if (screen->pango_context == NULL)
{
PangoContext *ctx;
char *lang;
/* Copied from GDK, Copyright 2001 Red Hat, Inc. */
#ifdef HAVE_XFT
static int use_xft = -1;
if (use_xft == -1)
{
char *val = g_getenv ("META_USE_XFT");
use_xft = val && (atoi (val) != 0);
}
if (use_xft)
ctx = pango_xft_get_context (screen->display, screen->number);
else
#endif /* HAVE_XFT */
ctx = pango_x_get_context (screen->display->xdisplay);
g_object_set_data (G_OBJECT (ctx), "meta-screen", screen);
pango_x_context_set_funcs (ctx, get_gc_func, free_gc_func);
lang = get_default_language ();
pango_context_set_lang (ctx, lang);
g_free (lang);
/* FIXME these two lines are wrong;
* we should be storing a context for each direction/desc,
* so that the args to meta_screen_get_pango_context()
* are honored.
*/
pango_context_set_base_dir (ctx, direction);
pango_context_set_font_description (ctx, desc);
screen->pango_context = ctx;
}
return screen->pango_context;
}
MetaScreen*
meta_screen_for_x_screen (Screen *xscreen)
{
MetaDisplay *display;
display = meta_display_for_x_display (DisplayOfScreen (xscreen));
if (display == NULL)
return NULL;
return meta_display_screen_for_x_screen (display, xscreen);
}
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static void
ui_slave_func (MetaUISlave *uislave,
MetaMessage *message,
gpointer data)
{
switch (message->header.message_code)
{
case MetaMessageCheckCode:
meta_verbose ("Received UI slave check message version: %s host alias: %s messages version: %d\n",
message->check.metacity_version,
message->check.host_alias,
message->check.messages_version);
if (strcmp (message->check.metacity_version, VERSION) != 0 ||
strcmp (message->check.host_alias, HOST_ALIAS) != 0 ||
message->check.messages_version != META_MESSAGES_VERSION)
{
meta_warning ("metacity-uislave has the wrong version; must use the one compiled with metacity\n");
meta_ui_slave_disable (uislave);
}
break;
default:
meta_verbose ("Received unhandled message from UI slave: %d\n",
message->header.message_code);
break;
}
}
static char*
get_screen_name (MetaDisplay *display,
int number)
{
char *p;
char *dname;
char *scr;
/* DisplayString gives us a sort of canonical display,
* vs. the user-entered name from XDisplayName()
*/
dname = g_strdup (DisplayString (display->xdisplay));
/* Change display name to specify this screen.
*/
p = strrchr (dname, ':');
if (p)
{
p = strchr (p, '.');
if (p)
*p = '\0';
}
scr = g_strdup_printf ("%s.%d", dname, number);
g_free (dname);
return scr;
}
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static gint
ptrcmp (gconstpointer a, gconstpointer b)
{
if (a < b)
return -1;
else if (a > b)
return 1;
else
return 0;
}
static void
listify_func (gpointer key, gpointer value, gpointer data)
{
GSList **listp;
listp = data;
*listp = g_slist_prepend (*listp, value);
}
void
meta_screen_foreach_window (MetaScreen *screen,
MetaScreenWindowFunc func,
gpointer data)
{
GSList *winlist;
GSList *tmp;
/* If we end up doing this often, just keeping a list
* of windows might be sensible.
*/
winlist = NULL;
g_hash_table_foreach (screen->display->window_ids,
listify_func,
&winlist);
winlist = g_slist_sort (winlist, ptrcmp);
tmp = winlist;
while (tmp != NULL)
{
/* If the next node doesn't contain this window
* a second time, delete the window.
*/
if (tmp->next == NULL ||
(tmp->next && tmp->next->data != tmp->data))
{
MetaWindow *window = tmp->data;
if (window->screen == screen)
(* func) (screen, window, data);
}
tmp = tmp->data;
}
g_slist_free (winlist);
}
static void
queue_draw (MetaScreen *screen, MetaWindow *window, gpointer data)
{
if (window->frame)
meta_frame_queue_draw (window->frame);
}
void
meta_screen_queue_frame_redraws (MetaScreen *screen)
{
meta_screen_foreach_window (screen, queue_draw, NULL);
}
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void
meta_screen_show_tip (MetaScreen *screen,
int root_x,
int root_y,
const char *markup)
{
/* even if screen->showing_tip, may change position/text */
meta_ui_slave_show_tip (screen->uislave, root_x, root_y, markup);
screen->showing_tooltip = TRUE;
}
void
meta_screen_hide_tip (MetaScreen *screen)
{
if (screen->showing_tooltip)
{
meta_ui_slave_hide_tip (screen->uislave);
screen->showing_tooltip = FALSE;
}
}