mutter/src/core/util.c

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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
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/* Metacity utilities */
/*
* Copyright (C) 2001 Havoc Pennington
* Copyright (C) 2005 Elijah Newren
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*
* 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.
*/
#include <config.h>
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#include "util.h"
#include "main.h"
#include <stdio.h>
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#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <X11/Xlib.h> /* must explicitly be included for Solaris; #326746 */
Merge of all the changes on the constraints_experiments branch. This is 2005-11-18 Elijah Newren <newren@gmail.com> Merge of all the changes on the constraints_experiments branch. This is just a summary, to get the full ChangeLog of those changes (approx. 2000 lines): cvs -q -z3 update -Pd -r constraints_experiments cvs -q -z3 diff -pu -r CONSTRAINTS_EXPERIMENTS_BRANCHPOINT ChangeLog Bugs fixed: unfiled - constraints.c is overly complicated[1] unfiled - constraints.c is not robust when all constraints cannot simultaneously be met (constraints need to be prioritized) unfiled - keep-titlebar-onscreen constraint is decoration unaware (since get_outermost_onscreen_positions() forgets to include decorations) unfiled - keyboard snap-moving and snap-resizing snap to hidden edges 109553 - gravity w/ simultaneous move & resize doesn't work 113601 - maximize vertical and horizontal should toggle and be constrained 122196 - windows show up under vertical panels 122670 - jerky/random resizing of window via keyboard[2] 124582 - keyboard and mouse snap-resizing and snap-moving erroneously moves the window multidimensionally 136307 - don't allow apps to resize themselves off the screen (*cough* filechooser *cough*) 142016, 143784 - windows should not span multiple xineramas unless placed there by the user 143145 - clamp new windows to screensize and force them onscreen, if they'll fit 144126 - Handle pathological strut lists sanely[3] 149867 - fixed aspect ratio windows are difficult to resize[4] 152898 - make screen edges consistent; allow easy slamming of windows into the left, right, and bottom edges of the screen too. 154706 - bouncing weirdness at screen edge with keyboard moving or resizing 156699 - avoid struts when placing windows, if possible (nasty a11y blocker) 302456 - dragging offscreen too restrictive 304857 - wireframe moving off the top of the screen is misleading 308521 - make uni-directional resizing easier with alt-middle-drag and prevent the occasional super annoying resize-the-wrong-side(s) behavior 312007 - snap-resize moves windows with a minimum size constraint 312104 - resizing the top of a window can cause the bottom to grow 319351 - don't instantly snap on mouse-move-snapping, remove braindeadedness of having order of releasing shift and releasing button press matter so much [1] fixed in my opinion, anyway. [2] Actually, it's not totally fixed--it's just annoying instead of almost completely unusable. Matthias had a suggestion that may fix the remainder of the problems (see http://tinyurl.com/bwzuu). [3] This bug was originally about not-quite-so-pathological cases but was left open for the worse cases. The code from the branch handles the remainder of the cases mentioned in this bug. [4] Actually, although it's far better there's still some minor issues left: a slight drift that's only noticeable after lots of resizing, and potential problems with partially onscreen constraints due to not clearing any fixed_directions flags (aspect ratio windows get resized in both directions and thus aren't fixed in one of them) New feature: 81704 - edge resistance for user move and resize operations; in particular 3 different kinds of resistance are implemented: Pixel-Distance: window movement is resisted when it aligns with an edge unless the movement is greater than a threshold number of pixels Timeout: window movement past an edge is prevented until a certain amount of time has elapsed during the operation since the first request to move it past that edge Keyboard-Buildup: when moving or resizing with the keyboard, once a window is aligned with a certain edge it cannot move past until the correct direction has been pressed enough times (e.g. 2 or 3 times) Major changes: - constraints.c has been rewritten; very few lines of code from the old version remain. There is a comment near the top of the function explaining the basics of how the new framework works. A more detailed explanation can be found in doc/how-constraints-works.txt - edge-resistance.[ch] are new files implementing edge-resistance. - boxes.[ch] are new files containing low-level error-prone functions used heavily in constraints.c and edge-resistance.c, among various places throughout the code. testboxes.c contains a thorough testsuite for the boxes.[ch] functions compiled into a program, testboxes. - meta_window_move_resize_internal() *must* be told the gravity of the associated operation (if it's just a move operation, the gravity will be ignored, but for resize and move+resize the correct value is needed) - the craziness of different values that meta_window_move_resize_internal() accepts has been documented in a large comment at the beginning of the function. It may be possible to clean this up some, but until then things will remain as they were before--caller beware. - screen and xinerama usable areas (i.e. places not covered by e.g. panels) are cached in the workspace now, as are the screen and xinerama edges. These get updated with the workarea in src/workspace.c:ensure_work_areas_validated()
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#include <X11/Xutil.h> /* Just for the definition of the various gravities */
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#ifdef HAVE_BACKTRACE
#include <execinfo.h>
void
meta_print_backtrace (void)
{
void *bt[500];
int bt_size;
int i;
char **syms;
bt_size = backtrace (bt, 500);
syms = backtrace_symbols (bt, bt_size);
i = 0;
while (i < bt_size)
{
meta_verbose (" %s\n", syms[i]);
++i;
}
free (syms);
}
#else
void
meta_print_backtrace (void)
{
meta_verbose ("Not compiled with backtrace support\n");
}
#endif
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static gboolean is_verbose = FALSE;
static gboolean is_debugging = FALSE;
static gboolean replace_current = FALSE;
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static int no_prefix = 0;
#ifdef WITH_VERBOSE_MODE
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static FILE* logfile = NULL;
static void
ensure_logfile (void)
{
if (logfile == NULL && g_getenv ("METACITY_USE_LOGFILE"))
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{
char *filename = NULL;
char *tmpl;
int fd;
GError *err;
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tmpl = g_strdup_printf ("metacity-%d-debug-log-XXXXXX",
(int) getpid ());
err = NULL;
fd = g_file_open_tmp (tmpl,
&filename,
&err);
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g_free (tmpl);
if (err != NULL)
{
meta_warning (_("Failed to open debug log: %s\n"),
err->message);
g_error_free (err);
return;
}
logfile = fdopen (fd, "w");
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if (logfile == NULL)
{
meta_warning (_("Failed to fdopen() log file %s: %s\n"),
filename, strerror (errno));
close (fd);
}
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else
{
g_printerr (_("Opened log file %s\n"), filename);
}
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g_free (filename);
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}
}
#endif
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gboolean
meta_is_verbose (void)
{
return is_verbose;
}
void
meta_set_verbose (gboolean setting)
{
#ifndef WITH_VERBOSE_MODE
if (setting)
meta_fatal (_("Metacity was compiled without support for verbose mode\n"));
#endif
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if (setting)
ensure_logfile ();
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is_verbose = setting;
}
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gboolean
meta_is_debugging (void)
{
return is_debugging;
}
void
meta_set_debugging (gboolean setting)
{
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if (setting)
ensure_logfile ();
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is_debugging = setting;
}
gboolean
meta_get_replace_current_wm (void)
{
return replace_current;
}
void
meta_set_replace_current_wm (gboolean setting)
{
replace_current = setting;
}
char *
meta_g_utf8_strndup (const gchar *src,
gsize n)
{
const gchar *s = src;
while (n && *s)
{
s = g_utf8_next_char (s);
n--;
}
return g_strndup (src, s - src);
}
static int
utf8_fputs (const char *str,
FILE *f)
{
char *l;
lengthen to 15 seconds 2002-11-30 Havoc Pennington <hp@pobox.com> * src/screen.c (STARTUP_TIMEOUT): lengthen to 15 seconds * src/util.c (utf8_fputs): hmm, return a value * src/screen.c (meta_screen_apply_startup_properties): new function to apply initial workspace based on startup sequence. * src/window.c (meta_window_new): load _NET_STARTUP_ID (meta_window_get_startup_id): new function * src/window-props.c (meta_display_init_window_prop_hooks): add hooks for _NET_STARTUP_ID * src/display.c (event_callback): send property events to groups. * src/xprops.c (meta_prop_get_values): make a type of INVALID mean to ignore that property (don't fetch its value). * src/group.c (meta_group_property_notify): new function * src/screen.c (set_supported_hint): support _NET_STARTUP_ID * src/display.c (meta_display_open): add _NET_STARTUP_ID to atoms we initialize * src/group-private.h: private header shared between group-props.c, group.c * src/group-props.h, src/group-props.c: new files to contain functions for retrieving group properties * src/window.c (meta_window_same_application): change this a bit to work with new definition of group * src/group.c (meta_window_get_group): always create a group for every window, using the window's own ID as group leader if required. * src/window.c (update_wm_hints): handle changes to group leader * src/group.c (meta_window_group_leader_changed): new function * src/display.h (struct _MetaDisplay): _NET_WM_WINDOW_TYPE_SPLASH, not SPLASHSCREEN. Reported by Gregory Merchan and Matthias Clasen. * src/screen.c (startup_sequence_timeout): when timing out a startup sequence, send a remove message, don't just time it out locally.
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int retval;
l = g_locale_from_utf8 (str, -1, NULL, NULL, NULL);
if (l == NULL)
lengthen to 15 seconds 2002-11-30 Havoc Pennington <hp@pobox.com> * src/screen.c (STARTUP_TIMEOUT): lengthen to 15 seconds * src/util.c (utf8_fputs): hmm, return a value * src/screen.c (meta_screen_apply_startup_properties): new function to apply initial workspace based on startup sequence. * src/window.c (meta_window_new): load _NET_STARTUP_ID (meta_window_get_startup_id): new function * src/window-props.c (meta_display_init_window_prop_hooks): add hooks for _NET_STARTUP_ID * src/display.c (event_callback): send property events to groups. * src/xprops.c (meta_prop_get_values): make a type of INVALID mean to ignore that property (don't fetch its value). * src/group.c (meta_group_property_notify): new function * src/screen.c (set_supported_hint): support _NET_STARTUP_ID * src/display.c (meta_display_open): add _NET_STARTUP_ID to atoms we initialize * src/group-private.h: private header shared between group-props.c, group.c * src/group-props.h, src/group-props.c: new files to contain functions for retrieving group properties * src/window.c (meta_window_same_application): change this a bit to work with new definition of group * src/group.c (meta_window_get_group): always create a group for every window, using the window's own ID as group leader if required. * src/window.c (update_wm_hints): handle changes to group leader * src/group.c (meta_window_group_leader_changed): new function * src/display.h (struct _MetaDisplay): _NET_WM_WINDOW_TYPE_SPLASH, not SPLASHSCREEN. Reported by Gregory Merchan and Matthias Clasen. * src/screen.c (startup_sequence_timeout): when timing out a startup sequence, send a remove message, don't just time it out locally.
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retval = fputs (str, f); /* just print it anyway, better than nothing */
else
lengthen to 15 seconds 2002-11-30 Havoc Pennington <hp@pobox.com> * src/screen.c (STARTUP_TIMEOUT): lengthen to 15 seconds * src/util.c (utf8_fputs): hmm, return a value * src/screen.c (meta_screen_apply_startup_properties): new function to apply initial workspace based on startup sequence. * src/window.c (meta_window_new): load _NET_STARTUP_ID (meta_window_get_startup_id): new function * src/window-props.c (meta_display_init_window_prop_hooks): add hooks for _NET_STARTUP_ID * src/display.c (event_callback): send property events to groups. * src/xprops.c (meta_prop_get_values): make a type of INVALID mean to ignore that property (don't fetch its value). * src/group.c (meta_group_property_notify): new function * src/screen.c (set_supported_hint): support _NET_STARTUP_ID * src/display.c (meta_display_open): add _NET_STARTUP_ID to atoms we initialize * src/group-private.h: private header shared between group-props.c, group.c * src/group-props.h, src/group-props.c: new files to contain functions for retrieving group properties * src/window.c (meta_window_same_application): change this a bit to work with new definition of group * src/group.c (meta_window_get_group): always create a group for every window, using the window's own ID as group leader if required. * src/window.c (update_wm_hints): handle changes to group leader * src/group.c (meta_window_group_leader_changed): new function * src/display.h (struct _MetaDisplay): _NET_WM_WINDOW_TYPE_SPLASH, not SPLASHSCREEN. Reported by Gregory Merchan and Matthias Clasen. * src/screen.c (startup_sequence_timeout): when timing out a startup sequence, send a remove message, don't just time it out locally.
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retval = fputs (l, f);
g_free (l);
lengthen to 15 seconds 2002-11-30 Havoc Pennington <hp@pobox.com> * src/screen.c (STARTUP_TIMEOUT): lengthen to 15 seconds * src/util.c (utf8_fputs): hmm, return a value * src/screen.c (meta_screen_apply_startup_properties): new function to apply initial workspace based on startup sequence. * src/window.c (meta_window_new): load _NET_STARTUP_ID (meta_window_get_startup_id): new function * src/window-props.c (meta_display_init_window_prop_hooks): add hooks for _NET_STARTUP_ID * src/display.c (event_callback): send property events to groups. * src/xprops.c (meta_prop_get_values): make a type of INVALID mean to ignore that property (don't fetch its value). * src/group.c (meta_group_property_notify): new function * src/screen.c (set_supported_hint): support _NET_STARTUP_ID * src/display.c (meta_display_open): add _NET_STARTUP_ID to atoms we initialize * src/group-private.h: private header shared between group-props.c, group.c * src/group-props.h, src/group-props.c: new files to contain functions for retrieving group properties * src/window.c (meta_window_same_application): change this a bit to work with new definition of group * src/group.c (meta_window_get_group): always create a group for every window, using the window's own ID as group leader if required. * src/window.c (update_wm_hints): handle changes to group leader * src/group.c (meta_window_group_leader_changed): new function * src/display.h (struct _MetaDisplay): _NET_WM_WINDOW_TYPE_SPLASH, not SPLASHSCREEN. Reported by Gregory Merchan and Matthias Clasen. * src/screen.c (startup_sequence_timeout): when timing out a startup sequence, send a remove message, don't just time it out locally.
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return retval;
}
Patch from Carlo Wood to fix handling of unidirectional maximization and 2007-04-02 Elijah Newren <newren gmail com> Patch from Carlo Wood to fix handling of unidirectional maximization and partial struts. #358311. * src/constraints.c (constrain_maximization): determine target size for unidirectionally maximized windows by determining how far they can be maximized without hitting orthogonal struts. Avoids weird "empty spaces". * src/boxes.[ch] (meta_rectangle_expand_to_avoiding_struts): new function 2007-04-02 Elijah Newren <newren gmail com> Make the strut lists (stored in workspaces) record both the rectangle and the side that the strut is on. Lots of code cleanups relating to struts. * src/boxes.h (struct MetaStrut): new struct for struts * src/window.[ch] (struct MetaStruts, struct MetaWindow, meta_window_update_struts): overhaul to make window's struts remember their side as well as their rectangular location, and just use a list instead of several copies of near-identical code for left/right/top/bottom (allowing us to nuke MetaStruts struct as well) * src/testboxes.c (new_meta_strut, get_strut_list): * src/workspace.c (ensure_work_areas_validated): * src/boxes.c (meta_rectangle_get_minimal_spanning_set_for_region, meta_rectangle_expand_to_avoiding_struts, get_disjoint_strut_rect_list_in_region, fix_up_edges, meta_rectangle_find_onscreen_edges, meta_rectangle_find_nonintersected_xinerama_edges): modify to handle struts being rectangle + side instead of just rectangle * src/workspace.c (ensure_work_areas_validated): simplify strut list creation considerably given MetaWindow change, modify work_area computations to take advantage of region computations being done (makes the code shorter as well as more robust against pathological cases). * src/util.[ch] (meta_free_gslist_and_elements): new convenience function * src/common.h (enum MetaDirection): * src/edge-resistance.c (movement_towards_edge): * src/boxes.c (meta_rectangle_edge_aligns, rectangle_and_edge_intersection, split_edge): Add more MetaDirection fields for convenience * src/boxes.h (enum FixedDirections): * src/constraints.c (setup_constraint_info, place_window_if_needed): add a FIXED_DIRECTION_NONE to the FixedDirections enum to make code more clear svn path=/trunk/; revision=3144
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void
meta_free_gslist_and_elements (GSList *list_to_deep_free)
{
g_slist_foreach (list_to_deep_free,
(void (*)(gpointer,gpointer))&g_free, /* ew, for ugly */
NULL);
g_slist_free (list_to_deep_free);
}
#ifdef WITH_VERBOSE_MODE
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void
meta_debug_spew_real (const char *format, ...)
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{
va_list args;
gchar *str;
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FILE *out;
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g_return_if_fail (format != NULL);
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if (!is_debugging)
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return;
va_start (args, format);
str = g_strdup_vprintf (format, args);
va_end (args);
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out = logfile ? logfile : stderr;
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if (no_prefix == 0)
utf8_fputs (_("Window manager: "), out);
utf8_fputs (str, out);
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fflush (out);
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g_free (str);
}
#endif /* WITH_VERBOSE_MODE */
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#ifdef WITH_VERBOSE_MODE
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void
meta_verbose_real (const char *format, ...)
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{
va_list args;
gchar *str;
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FILE *out;
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g_return_if_fail (format != NULL);
if (!is_verbose)
return;
va_start (args, format);
str = g_strdup_vprintf (format, args);
va_end (args);
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out = logfile ? logfile : stderr;
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if (no_prefix == 0)
utf8_fputs ("Window manager: ", out);
utf8_fputs (str, out);
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fflush (out);
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g_free (str);
}
#endif /* WITH_VERBOSE_MODE */
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#ifdef WITH_VERBOSE_MODE
static const char*
topic_name (MetaDebugTopic topic)
{
switch (topic)
{
case META_DEBUG_FOCUS:
return "FOCUS";
case META_DEBUG_WORKAREA:
return "WORKAREA";
case META_DEBUG_STACK:
return "STACK";
case META_DEBUG_THEMES:
return "THEMES";
case META_DEBUG_SM:
return "SM";
case META_DEBUG_EVENTS:
return "EVENTS";
case META_DEBUG_WINDOW_STATE:
return "WINDOW_STATE";
case META_DEBUG_WINDOW_OPS:
return "WINDOW_OPS";
case META_DEBUG_PLACEMENT:
return "PLACEMENT";
case META_DEBUG_GEOMETRY:
return "GEOMETRY";
case META_DEBUG_PING:
return "PING";
case META_DEBUG_XINERAMA:
return "XINERAMA";
case META_DEBUG_KEYBINDINGS:
return "KEYBINDINGS";
case META_DEBUG_SYNC:
return "SYNC";
case META_DEBUG_ERRORS:
return "ERRORS";
case META_DEBUG_STARTUP:
return "STARTUP";
case META_DEBUG_PREFS:
return "PREFS";
lengthen to 15 seconds 2002-11-30 Havoc Pennington <hp@pobox.com> * src/screen.c (STARTUP_TIMEOUT): lengthen to 15 seconds * src/util.c (utf8_fputs): hmm, return a value * src/screen.c (meta_screen_apply_startup_properties): new function to apply initial workspace based on startup sequence. * src/window.c (meta_window_new): load _NET_STARTUP_ID (meta_window_get_startup_id): new function * src/window-props.c (meta_display_init_window_prop_hooks): add hooks for _NET_STARTUP_ID * src/display.c (event_callback): send property events to groups. * src/xprops.c (meta_prop_get_values): make a type of INVALID mean to ignore that property (don't fetch its value). * src/group.c (meta_group_property_notify): new function * src/screen.c (set_supported_hint): support _NET_STARTUP_ID * src/display.c (meta_display_open): add _NET_STARTUP_ID to atoms we initialize * src/group-private.h: private header shared between group-props.c, group.c * src/group-props.h, src/group-props.c: new files to contain functions for retrieving group properties * src/window.c (meta_window_same_application): change this a bit to work with new definition of group * src/group.c (meta_window_get_group): always create a group for every window, using the window's own ID as group leader if required. * src/window.c (update_wm_hints): handle changes to group leader * src/group.c (meta_window_group_leader_changed): new function * src/display.h (struct _MetaDisplay): _NET_WM_WINDOW_TYPE_SPLASH, not SPLASHSCREEN. Reported by Gregory Merchan and Matthias Clasen. * src/screen.c (startup_sequence_timeout): when timing out a startup sequence, send a remove message, don't just time it out locally.
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case META_DEBUG_GROUPS:
return "GROUPS";
case META_DEBUG_RESIZING:
return "RESIZING";
case META_DEBUG_SHAPES:
return "SHAPES";
case META_DEBUG_COMPOSITOR:
return "COMPOSITOR";
case META_DEBUG_EDGE_RESISTANCE:
return "EDGE_RESISTANCE";
}
return "WM";
}
static int sync_count = 0;
void
meta_topic_real (MetaDebugTopic topic,
const char *format,
...)
{
va_list args;
gchar *str;
FILE *out;
g_return_if_fail (format != NULL);
if (!is_verbose)
return;
va_start (args, format);
str = g_strdup_vprintf (format, args);
va_end (args);
out = logfile ? logfile : stderr;
if (no_prefix == 0)
fprintf (out, "%s: ", topic_name (topic));
if (topic == META_DEBUG_SYNC)
{
++sync_count;
fprintf (out, "%d: ", sync_count);
}
utf8_fputs (str, out);
fflush (out);
g_free (str);
}
#endif /* WITH_VERBOSE_MODE */
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void
meta_bug (const char *format, ...)
{
va_list args;
gchar *str;
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FILE *out;
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g_return_if_fail (format != NULL);
va_start (args, format);
str = g_strdup_vprintf (format, args);
va_end (args);
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out = logfile ? logfile : stderr;
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if (no_prefix == 0)
utf8_fputs (_("Bug in window manager: "), out);
utf8_fputs (str, out);
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fflush (out);
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g_free (str);
meta_print_backtrace ();
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/* stop us in a debugger */
abort ();
}
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void
meta_warning (const char *format, ...)
{
va_list args;
gchar *str;
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FILE *out;
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g_return_if_fail (format != NULL);
va_start (args, format);
str = g_strdup_vprintf (format, args);
va_end (args);
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out = logfile ? logfile : stderr;
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if (no_prefix == 0)
utf8_fputs (_("Window manager warning: "), out);
utf8_fputs (str, out);
fflush (out);
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g_free (str);
}
void
meta_fatal (const char *format, ...)
{
va_list args;
gchar *str;
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FILE *out;
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g_return_if_fail (format != NULL);
va_start (args, format);
str = g_strdup_vprintf (format, args);
va_end (args);
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out = logfile ? logfile : stderr;
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if (no_prefix == 0)
utf8_fputs (_("Window manager error: "), out);
utf8_fputs (str, out);
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fflush (out);
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g_free (str);
meta_exit (META_EXIT_ERROR);
}
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void
meta_push_no_msg_prefix (void)
{
++no_prefix;
}
void
meta_pop_no_msg_prefix (void)
{
g_return_if_fail (no_prefix > 0);
--no_prefix;
}
void
meta_exit (MetaExitCode code)
{
exit (code);
}
gint
meta_unsigned_long_equal (gconstpointer v1,
gconstpointer v2)
{
return *((const gulong*) v1) == *((const gulong*) v2);
}
guint
meta_unsigned_long_hash (gconstpointer v)
{
gulong val = * (const gulong *) v;
/* I'm not sure this works so well. */
#if GLIB_SIZEOF_LONG > 4
return (guint) (val ^ (val >> 32));
#else
return val;
#endif
}
Merge of all the changes on the constraints_experiments branch. This is 2005-11-18 Elijah Newren <newren@gmail.com> Merge of all the changes on the constraints_experiments branch. This is just a summary, to get the full ChangeLog of those changes (approx. 2000 lines): cvs -q -z3 update -Pd -r constraints_experiments cvs -q -z3 diff -pu -r CONSTRAINTS_EXPERIMENTS_BRANCHPOINT ChangeLog Bugs fixed: unfiled - constraints.c is overly complicated[1] unfiled - constraints.c is not robust when all constraints cannot simultaneously be met (constraints need to be prioritized) unfiled - keep-titlebar-onscreen constraint is decoration unaware (since get_outermost_onscreen_positions() forgets to include decorations) unfiled - keyboard snap-moving and snap-resizing snap to hidden edges 109553 - gravity w/ simultaneous move & resize doesn't work 113601 - maximize vertical and horizontal should toggle and be constrained 122196 - windows show up under vertical panels 122670 - jerky/random resizing of window via keyboard[2] 124582 - keyboard and mouse snap-resizing and snap-moving erroneously moves the window multidimensionally 136307 - don't allow apps to resize themselves off the screen (*cough* filechooser *cough*) 142016, 143784 - windows should not span multiple xineramas unless placed there by the user 143145 - clamp new windows to screensize and force them onscreen, if they'll fit 144126 - Handle pathological strut lists sanely[3] 149867 - fixed aspect ratio windows are difficult to resize[4] 152898 - make screen edges consistent; allow easy slamming of windows into the left, right, and bottom edges of the screen too. 154706 - bouncing weirdness at screen edge with keyboard moving or resizing 156699 - avoid struts when placing windows, if possible (nasty a11y blocker) 302456 - dragging offscreen too restrictive 304857 - wireframe moving off the top of the screen is misleading 308521 - make uni-directional resizing easier with alt-middle-drag and prevent the occasional super annoying resize-the-wrong-side(s) behavior 312007 - snap-resize moves windows with a minimum size constraint 312104 - resizing the top of a window can cause the bottom to grow 319351 - don't instantly snap on mouse-move-snapping, remove braindeadedness of having order of releasing shift and releasing button press matter so much [1] fixed in my opinion, anyway. [2] Actually, it's not totally fixed--it's just annoying instead of almost completely unusable. Matthias had a suggestion that may fix the remainder of the problems (see http://tinyurl.com/bwzuu). [3] This bug was originally about not-quite-so-pathological cases but was left open for the worse cases. The code from the branch handles the remainder of the cases mentioned in this bug. [4] Actually, although it's far better there's still some minor issues left: a slight drift that's only noticeable after lots of resizing, and potential problems with partially onscreen constraints due to not clearing any fixed_directions flags (aspect ratio windows get resized in both directions and thus aren't fixed in one of them) New feature: 81704 - edge resistance for user move and resize operations; in particular 3 different kinds of resistance are implemented: Pixel-Distance: window movement is resisted when it aligns with an edge unless the movement is greater than a threshold number of pixels Timeout: window movement past an edge is prevented until a certain amount of time has elapsed during the operation since the first request to move it past that edge Keyboard-Buildup: when moving or resizing with the keyboard, once a window is aligned with a certain edge it cannot move past until the correct direction has been pressed enough times (e.g. 2 or 3 times) Major changes: - constraints.c has been rewritten; very few lines of code from the old version remain. There is a comment near the top of the function explaining the basics of how the new framework works. A more detailed explanation can be found in doc/how-constraints-works.txt - edge-resistance.[ch] are new files implementing edge-resistance. - boxes.[ch] are new files containing low-level error-prone functions used heavily in constraints.c and edge-resistance.c, among various places throughout the code. testboxes.c contains a thorough testsuite for the boxes.[ch] functions compiled into a program, testboxes. - meta_window_move_resize_internal() *must* be told the gravity of the associated operation (if it's just a move operation, the gravity will be ignored, but for resize and move+resize the correct value is needed) - the craziness of different values that meta_window_move_resize_internal() accepts has been documented in a large comment at the beginning of the function. It may be possible to clean this up some, but until then things will remain as they were before--caller beware. - screen and xinerama usable areas (i.e. places not covered by e.g. panels) are cached in the workspace now, as are the screen and xinerama edges. These get updated with the workarea in src/workspace.c:ensure_work_areas_validated()
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const char*
meta_gravity_to_string (int gravity)
{
switch (gravity)
{
case NorthWestGravity:
return "NorthWestGravity";
break;
case NorthGravity:
return "NorthGravity";
break;
case NorthEastGravity:
return "NorthEastGravity";
break;
case WestGravity:
return "WestGravity";
break;
case CenterGravity:
return "CenterGravity";
break;
case EastGravity:
return "EastGravity";
break;
case SouthWestGravity:
return "SouthWestGravity";
break;
case SouthGravity:
return "SouthGravity";
break;
case SouthEastGravity:
return "SouthEastGravity";
break;
case StaticGravity:
return "StaticGravity";
break;
default:
return "NorthWestGravity";
break;
}
}