9641bc5ee7
2005-11-20 Elijah Newren <newren@gmail.com> * src/constraints.c (place_window_if_needed): compute the frame geometry due to maximization only after actually maximizing. Fixes #321902.
1083 lines
42 KiB
C
1083 lines
42 KiB
C
/* Metacity size/position constraints */
|
|
|
|
/*
|
|
* Copyright (C) 2002, 2003 Red Hat, Inc.
|
|
* Copyright (C) 2003, 2004 Rob Adams
|
|
* Copyright (C) 2005 Elijah Newren
|
|
*
|
|
* 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>
|
|
#include "constraints.h"
|
|
#include "workspace.h"
|
|
#include "place.h"
|
|
|
|
#include <stdlib.h>
|
|
#include <math.h>
|
|
|
|
#if 0
|
|
// This is the short and sweet version of how to hack on this file; see
|
|
// doc/how-constraints-works.txt for the gory details. The basics of
|
|
// understanding this file can be shown by the steps needed to add a new
|
|
// constraint, which are:
|
|
// 1) Add a new entry in the ConstraintPriority enum; higher values
|
|
// have higher priority
|
|
// 2) Write a new function following the format of the example below,
|
|
// "constrain_whatever".
|
|
// 3) Add your function to the all_constraints and all_constraint_names
|
|
// arrays (the latter of which is for debugging purposes)
|
|
//
|
|
// An example constraint function, constrain_whatever:
|
|
//
|
|
// /* constrain_whatever does the following:
|
|
// * Quits (returning true) if priority is higher than PRIORITY_WHATEVER
|
|
// * If check_only is TRUE
|
|
// * Returns whether the constraint is satisfied or not
|
|
// * otherwise
|
|
// * Enforces the constraint
|
|
// * Note that the value of PRIORITY_WHATEVER is centralized with the
|
|
// * priorities of other constraints in the definition of ConstrainPriority
|
|
// * for easier maintenance and shuffling of priorities.
|
|
// */
|
|
// static gboolean
|
|
// constrain_whatever (MetaWindow *window,
|
|
// ConstraintInfo *info,
|
|
// ConstraintPriority priority,
|
|
// gboolean check_only)
|
|
// {
|
|
// if (priority > PRIORITY_WHATEVER)
|
|
// return TRUE;
|
|
//
|
|
// /* Determine whether constraint applies; note that if the constraint
|
|
// * cannot possibly be satisfied, constraint_applies should be set to
|
|
// * false. If we don't do this, all constraints with a lesser priority
|
|
// * will be dropped along with this one, and we'd rather apply as many as
|
|
// * possible.
|
|
// */
|
|
// if (!constraint_applies)
|
|
// return TRUE;
|
|
//
|
|
// /* Determine whether constraint is already satisfied; if we're only
|
|
// * checking the status of whether the constraint is satisfied, we end
|
|
// * here.
|
|
// */
|
|
// if (check_only || constraint_already_satisfied)
|
|
// return constraint_already_satisfied;
|
|
//
|
|
// /* Enforce constraints */
|
|
// return TRUE; /* Note that we exited early if check_only is FALSE; also,
|
|
// * we know we can return TRUE here because we exited early
|
|
// * if the constraint could not be satisfied; not that the
|
|
// * return value is heeded in this case...
|
|
// */
|
|
// }
|
|
#endif
|
|
|
|
typedef enum
|
|
{
|
|
PRIORITY_MINIMUM = 0, // Dummy value used for loop start = min(all priorities)
|
|
PRIORITY_ASPECT_RATIO = 0,
|
|
PRIORITY_ENTIRELY_VISIBLE_ON_SINGLE_XINERAMA = 0,
|
|
PRIORITY_ENTIRELY_VISIBLE_ON_WORKAREA = 1,
|
|
PRIORITY_SIZE_HINTS_INCREMENTS = 1,
|
|
PRIORITY_MAXIMIZATION = 2,
|
|
PRIORITY_FULLSCREEN = 2,
|
|
PRIORITY_SIZE_HINTS_LIMITS = 3,
|
|
PRIORITY_PARTIALLY_VISIBLE_ON_WORKAREA = 4,
|
|
PRIORITY_MAXIMUM = 4 // Dummy value used for loop end = max(all priorities)
|
|
} ConstraintPriority;
|
|
|
|
typedef enum
|
|
{
|
|
ACTION_MOVE,
|
|
ACTION_RESIZE,
|
|
ACTION_MOVE_AND_RESIZE
|
|
} ActionType;
|
|
|
|
typedef struct
|
|
{
|
|
MetaRectangle orig;
|
|
MetaRectangle current;
|
|
MetaFrameGeometry *fgeom;
|
|
ActionType action_type;
|
|
gboolean is_user_action;
|
|
|
|
/* I know that these two things probably look similar at first, but they
|
|
* have much different uses. See doc/how-constraints-works.txt for for
|
|
* explanation of the differences and similarity between resize_gravity
|
|
* and fixed_directions
|
|
*/
|
|
int resize_gravity;
|
|
FixedDirections fixed_directions;
|
|
|
|
/* work_area_xinerama - current xinerama region minus struts
|
|
* entire_xinerama - current xienrama, including strut regions
|
|
*/
|
|
MetaRectangle work_area_xinerama;
|
|
MetaRectangle entire_xinerama;
|
|
|
|
/* Spanning rectangles for the non-covered (by struts) region of the
|
|
* screen and also for just the current xinerama
|
|
*/
|
|
GList *usable_screen_region;
|
|
GList *usable_xinerama_region;
|
|
} ConstraintInfo;
|
|
|
|
static gboolean constrain_maximization (MetaWindow *window,
|
|
ConstraintInfo *info,
|
|
ConstraintPriority priority,
|
|
gboolean check_only);
|
|
static gboolean constrain_fullscreen (MetaWindow *window,
|
|
ConstraintInfo *info,
|
|
ConstraintPriority priority,
|
|
gboolean check_only);
|
|
static gboolean constrain_size_increments (MetaWindow *window,
|
|
ConstraintInfo *info,
|
|
ConstraintPriority priority,
|
|
gboolean check_only);
|
|
static gboolean constrain_size_limits (MetaWindow *window,
|
|
ConstraintInfo *info,
|
|
ConstraintPriority priority,
|
|
gboolean check_only);
|
|
static gboolean constrain_aspect_ratio (MetaWindow *window,
|
|
ConstraintInfo *info,
|
|
ConstraintPriority priority,
|
|
gboolean check_only);
|
|
static gboolean constrain_to_single_xinerama (MetaWindow *window,
|
|
ConstraintInfo *info,
|
|
ConstraintPriority priority,
|
|
gboolean check_only);
|
|
static gboolean constrain_fully_onscreen (MetaWindow *window,
|
|
ConstraintInfo *info,
|
|
ConstraintPriority priority,
|
|
gboolean check_only);
|
|
static gboolean constrain_partially_onscreen (MetaWindow *window,
|
|
ConstraintInfo *info,
|
|
ConstraintPriority priority,
|
|
gboolean check_only);
|
|
|
|
static void setup_constraint_info (ConstraintInfo *info,
|
|
MetaWindow *window,
|
|
MetaFrameGeometry *orig_fgeom,
|
|
MetaMoveResizeFlags flags,
|
|
int resize_gravity,
|
|
const MetaRectangle *orig,
|
|
MetaRectangle *new);
|
|
static void place_window_if_needed (MetaWindow *window,
|
|
ConstraintInfo *info);
|
|
static void update_onscreen_requirements (MetaWindow *window,
|
|
ConstraintInfo *info);
|
|
static void extend_by_frame (MetaRectangle *rect,
|
|
const MetaFrameGeometry *fgeom);
|
|
static void unextend_by_frame (MetaRectangle *rect,
|
|
const MetaFrameGeometry *fgeom);
|
|
static inline void get_size_limits (const MetaWindow *window,
|
|
const MetaFrameGeometry *fgeom,
|
|
gboolean include_frame,
|
|
MetaRectangle *min_size,
|
|
MetaRectangle *max_size);
|
|
|
|
typedef gboolean (* ConstraintFunc) (MetaWindow *window,
|
|
ConstraintInfo *info,
|
|
ConstraintPriority priority,
|
|
gboolean check_only);
|
|
|
|
typedef struct {
|
|
ConstraintFunc func;
|
|
const char* name;
|
|
} Constraint;
|
|
|
|
static const Constraint all_constraints[] = {
|
|
{constrain_maximization, "constrain_maximization"},
|
|
{constrain_fullscreen, "constrain_fullscreen"},
|
|
{constrain_size_increments, "constrain_size_increments"},
|
|
{constrain_size_limits, "constrain_size_limits"},
|
|
{constrain_aspect_ratio, "constrain_aspect_ratio"},
|
|
{constrain_to_single_xinerama, "constrain_to_single_xinerama"},
|
|
{constrain_fully_onscreen, "constrain_fully_onscreen"},
|
|
{constrain_partially_onscreen, "constrain_partially_onscreen"},
|
|
{NULL, NULL}
|
|
};
|
|
|
|
static gboolean
|
|
do_all_constraints (MetaWindow *window,
|
|
ConstraintInfo *info,
|
|
ConstraintPriority priority,
|
|
gboolean check_only)
|
|
{
|
|
const Constraint *constraint;
|
|
gboolean satisfied;
|
|
|
|
constraint = &all_constraints[0];
|
|
satisfied = TRUE;
|
|
while (constraint->func != NULL)
|
|
{
|
|
satisfied = satisfied &&
|
|
(*constraint->func) (window, info, priority, check_only);
|
|
|
|
if (!check_only)
|
|
{
|
|
/* Log how the constraint modified the position */
|
|
meta_topic (META_DEBUG_GEOMETRY,
|
|
"info->current is %d,%d +%d,%d after %s\n",
|
|
info->current.x, info->current.y,
|
|
info->current.width, info->current.height,
|
|
constraint->name);
|
|
}
|
|
else if (!satisfied)
|
|
{
|
|
/* Log which constraint was not satisfied */
|
|
meta_topic (META_DEBUG_GEOMETRY,
|
|
"constraint %s not satisfied.\n",
|
|
constraint->name);
|
|
return FALSE;
|
|
}
|
|
++constraint;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
void
|
|
meta_window_constrain (MetaWindow *window,
|
|
MetaFrameGeometry *orig_fgeom,
|
|
MetaMoveResizeFlags flags,
|
|
int resize_gravity,
|
|
const MetaRectangle *orig,
|
|
MetaRectangle *new)
|
|
{
|
|
ConstraintInfo info;
|
|
|
|
/* WARNING: orig and new specify positions and sizes of the inner window,
|
|
* not the outer. This is a common gotcha since half the constraints
|
|
* deal with inner window position/size and half deal with outer. See
|
|
* doc/how-constraints-works.txt for more information.
|
|
*/
|
|
meta_topic (META_DEBUG_GEOMETRY,
|
|
"Constraining %s in move from %d,%d %dx%d to %d,%d %dx%d\n",
|
|
window->desc,
|
|
orig->x, orig->y, orig->width, orig->height,
|
|
new->x, new->y, new->width, new->height);
|
|
|
|
setup_constraint_info (&info,
|
|
window,
|
|
orig_fgeom,
|
|
flags,
|
|
resize_gravity,
|
|
orig,
|
|
new);
|
|
place_window_if_needed (window, &info);
|
|
|
|
ConstraintPriority priority = PRIORITY_MINIMUM;
|
|
gboolean satisfied = FALSE;
|
|
while (!satisfied && priority <= PRIORITY_MAXIMUM) {
|
|
gboolean check_only = TRUE;
|
|
|
|
/* Individually enforce all the high-enough priority constraints */
|
|
do_all_constraints (window, &info, priority, !check_only);
|
|
|
|
/* Check if all high-enough priority constraints are simultaneously
|
|
* satisfied
|
|
*/
|
|
satisfied = do_all_constraints (window, &info, priority, check_only);
|
|
|
|
/* Drop the least important constraints if we can't satisfy them all */
|
|
priority++;
|
|
}
|
|
|
|
/* Make sure we use the constrained position */
|
|
*new = info.current;
|
|
|
|
/* We may need to update window->require_fully_onscreen,
|
|
* window->require_on_single_xinerama, and perhaps other quantities
|
|
* if this was a user move or user move-and-resize operation.
|
|
*/
|
|
update_onscreen_requirements (window, &info);
|
|
|
|
/* Ew, what an ugly way to do things. Destructors (in a real OOP language,
|
|
* not gobject-style--gobject would be more pain than it's worth) or
|
|
* smart pointers would be so much nicer here. *shrug*
|
|
*/
|
|
if (!orig_fgeom)
|
|
g_free (info.fgeom);
|
|
}
|
|
|
|
static void
|
|
setup_constraint_info (ConstraintInfo *info,
|
|
MetaWindow *window,
|
|
MetaFrameGeometry *orig_fgeom,
|
|
MetaMoveResizeFlags flags,
|
|
int resize_gravity,
|
|
const MetaRectangle *orig,
|
|
MetaRectangle *new)
|
|
{
|
|
info->orig = *orig;
|
|
info->current = *new;
|
|
|
|
/* Create a fake frame geometry if none really exists */
|
|
if (orig_fgeom && !window->fullscreen)
|
|
info->fgeom = orig_fgeom;
|
|
else
|
|
info->fgeom = g_new0 (MetaFrameGeometry, 1);
|
|
|
|
if (flags & META_IS_MOVE_ACTION && flags & META_IS_RESIZE_ACTION)
|
|
info->action_type = ACTION_MOVE_AND_RESIZE;
|
|
else if (flags & META_IS_RESIZE_ACTION)
|
|
info->action_type = ACTION_RESIZE;
|
|
else if (flags & META_IS_MOVE_ACTION)
|
|
info->action_type = ACTION_MOVE_AND_RESIZE;
|
|
else
|
|
g_error ("BAD, BAD developer! No treat for you! (Fix your calls to "
|
|
"meta_window_move_resize_internal()).\n");
|
|
|
|
info->is_user_action = (flags & META_IS_USER_ACTION);
|
|
|
|
info->resize_gravity = resize_gravity;
|
|
|
|
info->fixed_directions = 0;
|
|
/* If x directions don't change but either y direction does */
|
|
if ( orig->x == new->x && orig->x + orig->width == new->x + new->width &&
|
|
(orig->y != new->y || orig->y + orig->height != new->y + new->height))
|
|
{
|
|
info->fixed_directions = FIXED_DIRECTION_X;
|
|
}
|
|
/* If y directions don't change but either x direction does */
|
|
if ( orig->y == new->y && orig->y + orig->height == new->y + new->height &&
|
|
(orig->x != new->x || orig->x + orig->width != new->x + new->width ))
|
|
{
|
|
info->fixed_directions = FIXED_DIRECTION_Y;
|
|
}
|
|
|
|
meta_window_get_work_area_current_xinerama (window, &info->work_area_xinerama);
|
|
|
|
const MetaXineramaScreenInfo *xinerama_info =
|
|
meta_screen_get_xinerama_for_window (window->screen, window);
|
|
info->entire_xinerama = xinerama_info->rect;
|
|
|
|
MetaWorkspace *cur_workspace = window->screen->active_workspace;
|
|
info->usable_screen_region =
|
|
meta_workspace_get_onscreen_region (cur_workspace);
|
|
info->usable_xinerama_region =
|
|
meta_workspace_get_onxinerama_region (cur_workspace,
|
|
xinerama_info->number);
|
|
|
|
/* Log all this information for debugging */
|
|
meta_topic (META_DEBUG_GEOMETRY,
|
|
"Setting up constraint info:\n"
|
|
" orig: %d,%d +%d,%d\n"
|
|
" new : %d,%d +%d,%d\n"
|
|
" fgeom: %d,%d,%d,%d\n"
|
|
" action_type : %s\n"
|
|
" is_user_action : %s\n"
|
|
" resize_gravity : %s\n"
|
|
" fixed_directions: %s\n"
|
|
" work_area_xinerama: %d,%d +%d,%d\n"
|
|
" entire_xinerama : %d,%d +%d,%d\n",
|
|
info->orig.x, info->orig.y, info->orig.width, info->orig.height,
|
|
info->current.x, info->current.y,
|
|
info->current.width, info->current.height,
|
|
info->fgeom->left_width, info->fgeom->right_width,
|
|
info->fgeom->top_height, info->fgeom->bottom_height,
|
|
(info->action_type == ACTION_MOVE) ? "Move" :
|
|
(info->action_type == ACTION_RESIZE) ? "Resize" :
|
|
(info->action_type == ACTION_MOVE_AND_RESIZE) ? "Move&Resize" :
|
|
"Freakin' Invalid Stupid",
|
|
(info->is_user_action) ? "true" : "false",
|
|
meta_gravity_to_string (info->resize_gravity),
|
|
(info->fixed_directions == 0) ? "None" :
|
|
(info->fixed_directions == FIXED_DIRECTION_X) ? "X fixed" :
|
|
(info->fixed_directions == FIXED_DIRECTION_Y) ? "Y fixed" :
|
|
"Freakin' Invalid Stupid",
|
|
info->work_area_xinerama.x, info->work_area_xinerama.y,
|
|
info->work_area_xinerama.width,
|
|
info->work_area_xinerama.height,
|
|
info->entire_xinerama.x, info->entire_xinerama.y,
|
|
info->entire_xinerama.width, info->entire_xinerama.height);
|
|
}
|
|
|
|
static void
|
|
place_window_if_needed(MetaWindow *window,
|
|
ConstraintInfo *info)
|
|
{
|
|
gboolean did_placement;
|
|
|
|
/* Do placement if any, so we go ahead and apply position
|
|
* constraints in a move-only context. Don't place
|
|
* maximized/fullscreen windows until they are unmaximized
|
|
* and unfullscreened
|
|
*/
|
|
did_placement = FALSE;
|
|
if (!window->placed &&
|
|
window->calc_placement &&
|
|
!META_WINDOW_MAXIMIZED (window) &&
|
|
!window->fullscreen)
|
|
{
|
|
MetaRectangle placed_rect = info->orig;
|
|
|
|
meta_window_place (window, info->fgeom, info->orig.x, info->orig.y,
|
|
&placed_rect.x, &placed_rect.y);
|
|
did_placement = TRUE;
|
|
|
|
/* placing the window may have changed the xinerama. Find the
|
|
* new xinerama and update the ConstraintInfo
|
|
*/
|
|
const MetaXineramaScreenInfo *xinerama_info =
|
|
meta_screen_get_xinerama_for_rect (window->screen, &placed_rect);
|
|
info->entire_xinerama = xinerama_info->rect;
|
|
meta_window_get_work_area_for_xinerama (window,
|
|
xinerama_info->number,
|
|
&info->work_area_xinerama);
|
|
|
|
info->current.x = placed_rect.x;
|
|
info->current.y = placed_rect.y;
|
|
|
|
/* Since we just barely placed the window, there's no reason to
|
|
* consider any of the directions fixed.
|
|
*/
|
|
info->fixed_directions = 0;
|
|
}
|
|
|
|
if ((window->maximize_horizontally_after_placement ||
|
|
window->maximize_vertically_after_placement) &&
|
|
(window->placed || did_placement))
|
|
{
|
|
/* define a sane saved_rect so that the user can unmaximize to
|
|
* something reasonable.
|
|
*/
|
|
if (info->current.width >= info->work_area_xinerama.width)
|
|
{
|
|
info->current.width = .75 * info->work_area_xinerama.width;
|
|
info->current.x = info->work_area_xinerama.x +
|
|
.125 * info->work_area_xinerama.width;
|
|
}
|
|
if (info->current.height >= info->work_area_xinerama.height)
|
|
{
|
|
info->current.height = .75 * info->work_area_xinerama.height;
|
|
info->current.y = info->work_area_xinerama.y +
|
|
.083 * info->work_area_xinerama.height;
|
|
}
|
|
|
|
if (window->maximize_horizontally_after_placement &&
|
|
window->maximize_vertically_after_placement)
|
|
meta_window_maximize_internal (window,
|
|
META_MAXIMIZE_HORIZONTAL |
|
|
META_MAXIMIZE_VERTICAL,
|
|
&info->current);
|
|
else if (window->maximize_horizontally_after_placement)
|
|
{
|
|
info->current.x = info->work_area_xinerama.x
|
|
+ info->fgeom->left_width;
|
|
info->current.width = info->work_area_xinerama.width
|
|
- info->fgeom->left_width - info->fgeom->right_width;
|
|
}
|
|
else if (window->maximize_vertically_after_placement);
|
|
{
|
|
info->current.y = info->work_area_xinerama.y
|
|
+ info->fgeom->top_height;
|
|
info->current.height = info->work_area_xinerama.height
|
|
- info->fgeom->top_height - info->fgeom->bottom_height;
|
|
}
|
|
|
|
/* maximization may have changed frame geometry */
|
|
if (window->frame && !window->fullscreen)
|
|
meta_frame_calc_geometry (window->frame, info->fgeom);
|
|
|
|
window->maximize_horizontally_after_placement = FALSE;
|
|
window->maximize_vertically_after_placement = FALSE;
|
|
}
|
|
}
|
|
|
|
static void
|
|
update_onscreen_requirements (MetaWindow *window,
|
|
ConstraintInfo *info)
|
|
{
|
|
gboolean old;
|
|
|
|
/* We only apply the various onscreen requirements to normal windows */
|
|
if (window->type == META_WINDOW_DESKTOP ||
|
|
window->type == META_WINDOW_DOCK)
|
|
return;
|
|
|
|
/* USABILITY NOTE: Naturally, I only want the require_fully_onscreen and
|
|
* require_on_single_xinerama flags to *become false* due to user
|
|
* interactions (which is allowed since certain constraints are ignored
|
|
* for user interactions regardless of the setting of these flags).
|
|
* However, whether to make these flags *become true* due to just an
|
|
* application interaction is a little trickier. It's possible that
|
|
* users may find not doing that strange since two application
|
|
* interactions that resize in opposite ways don't necessarily end up
|
|
* cancelling--but it may also be strange for the user to have an
|
|
* application resize the window so that it's onscreen, the user forgets
|
|
* about it, and then later the app is able to resize itself off the
|
|
* screen. Anyway, for now, I'm think the latter is the more problematic
|
|
* case but this may need to be revisited.
|
|
*/
|
|
|
|
/* The require onscreen/on-single-xinerama stuff is relative to the
|
|
* outer window, not the inner
|
|
*/
|
|
extend_by_frame (&info->current, info->fgeom);
|
|
|
|
/* Update whether we want future constraint runs to require the
|
|
* window to be on fully onscreen.
|
|
*/
|
|
old = window->require_fully_onscreen;
|
|
window->require_fully_onscreen =
|
|
meta_rectangle_contained_in_region (info->usable_screen_region,
|
|
&info->current);
|
|
if (old ^ window->require_fully_onscreen)
|
|
meta_topic (META_DEBUG_GEOMETRY,
|
|
"require_fully_onscreen for %s toggled to %s\n",
|
|
window->desc,
|
|
window->require_fully_onscreen ? "TRUE" : "FALSE");
|
|
|
|
/* Update whether we want future constraint runs to require the
|
|
* window to be on a single xinerama.
|
|
*/
|
|
old = window->require_on_single_xinerama;
|
|
window->require_on_single_xinerama =
|
|
meta_rectangle_contained_in_region (info->usable_xinerama_region,
|
|
&info->current);
|
|
if (old ^ window->require_on_single_xinerama)
|
|
meta_topic (META_DEBUG_GEOMETRY,
|
|
"require_on_single_xinerama for %s toggled to %s\n",
|
|
window->desc,
|
|
window->require_on_single_xinerama ? "TRUE" : "FALSE");
|
|
|
|
/* Don't forget to restore the position of the window */
|
|
unextend_by_frame (&info->current, info->fgeom);
|
|
}
|
|
|
|
static void
|
|
extend_by_frame (MetaRectangle *rect,
|
|
const MetaFrameGeometry *fgeom)
|
|
{
|
|
rect->x -= fgeom->left_width;
|
|
rect->y -= fgeom->top_height;
|
|
rect->width += fgeom->left_width + fgeom->right_width;
|
|
rect->height += fgeom->top_height + fgeom->bottom_height;
|
|
}
|
|
|
|
static void
|
|
unextend_by_frame (MetaRectangle *rect,
|
|
const MetaFrameGeometry *fgeom)
|
|
{
|
|
rect->x += fgeom->left_width;
|
|
rect->y += fgeom->top_height;
|
|
rect->width -= fgeom->left_width + fgeom->right_width;
|
|
rect->height -= fgeom->top_height + fgeom->bottom_height;
|
|
}
|
|
|
|
static inline void
|
|
get_size_limits (const MetaWindow *window,
|
|
const MetaFrameGeometry *fgeom,
|
|
gboolean include_frame,
|
|
MetaRectangle *min_size,
|
|
MetaRectangle *max_size)
|
|
{
|
|
/* We pack the results into MetaRectangle structs just for convienience; we
|
|
* don't actually use the position of those rects.
|
|
*/
|
|
min_size->width = window->size_hints.min_width;
|
|
min_size->height = window->size_hints.min_height;
|
|
max_size->width = window->size_hints.max_width;
|
|
max_size->height = window->size_hints.max_height;
|
|
|
|
if (include_frame)
|
|
{
|
|
int fw = fgeom->left_width + fgeom->right_width;
|
|
int fh = fgeom->top_height + fgeom->bottom_height;
|
|
|
|
min_size->width += fw;
|
|
min_size->height += fh;
|
|
max_size->width += fw;
|
|
max_size->height += fh;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
constrain_maximization (MetaWindow *window,
|
|
ConstraintInfo *info,
|
|
ConstraintPriority priority,
|
|
gboolean check_only)
|
|
{
|
|
if (priority > PRIORITY_MAXIMIZATION)
|
|
return TRUE;
|
|
|
|
/* Determine whether constraint applies; exit if it doesn't */
|
|
if (!window->maximized_horizontally && !window->maximized_vertically)
|
|
return TRUE;
|
|
|
|
MetaRectangle min_size, max_size;
|
|
MetaRectangle work_area = info->work_area_xinerama;
|
|
unextend_by_frame (&work_area, info->fgeom);
|
|
get_size_limits (window, info->fgeom, FALSE, &min_size, &max_size);
|
|
|
|
gboolean hminbad, vminbad, hmaxbad, vmaxbad;
|
|
hminbad = work_area.width < min_size.width && window->maximized_horizontally;
|
|
vminbad = work_area.height < min_size.height && window->maximized_vertically;
|
|
hmaxbad = work_area.width > max_size.width && window->maximized_horizontally;
|
|
vmaxbad = work_area.height > max_size.height && window->maximized_vertically;
|
|
if (hminbad || vminbad || hmaxbad || vmaxbad)
|
|
return TRUE;
|
|
|
|
/* Determine whether constraint is already satisfied; exit if it is */
|
|
gboolean horiz_equal, vert_equal;
|
|
horiz_equal = work_area.x == info->current.x &&
|
|
work_area.width == info->current.width;
|
|
vert_equal = work_area.y == info->current.y &&
|
|
work_area.height == info->current.height;
|
|
gboolean constraint_already_satisfied =
|
|
(horiz_equal || !window->maximized_horizontally) &&
|
|
(vert_equal || !window->maximized_vertically);
|
|
if (check_only || constraint_already_satisfied)
|
|
return constraint_already_satisfied;
|
|
|
|
/*** Enforce constraint ***/
|
|
if (window->maximized_horizontally)
|
|
{
|
|
info->current.x = work_area.x;
|
|
info->current.width = work_area.width;
|
|
}
|
|
if (window->maximized_vertically)
|
|
{
|
|
info->current.y = work_area.y;
|
|
info->current.height = work_area.height;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
constrain_fullscreen (MetaWindow *window,
|
|
ConstraintInfo *info,
|
|
ConstraintPriority priority,
|
|
gboolean check_only)
|
|
{
|
|
if (priority > PRIORITY_FULLSCREEN)
|
|
return TRUE;
|
|
|
|
/* Determine whether constraint applies; exit if it doesn't */
|
|
if (!window->fullscreen)
|
|
return TRUE;
|
|
MetaRectangle min_size, max_size;
|
|
MetaRectangle xinerama = info->entire_xinerama;
|
|
get_size_limits (window, info->fgeom, FALSE, &min_size, &max_size);
|
|
gboolean too_big = !meta_rectangle_could_fit_rect (&xinerama, &min_size);
|
|
gboolean too_small = !meta_rectangle_could_fit_rect (&max_size, &xinerama);
|
|
if (too_big || too_small)
|
|
return TRUE;
|
|
|
|
/* Determine whether constraint is already satisfied; exit if it is */
|
|
gboolean constraint_already_satisfied =
|
|
meta_rectangle_equal (&info->current, &xinerama);
|
|
if (check_only || constraint_already_satisfied)
|
|
return constraint_already_satisfied;
|
|
|
|
/*** Enforce constraint ***/
|
|
info->current = xinerama;
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
constrain_size_increments (MetaWindow *window,
|
|
ConstraintInfo *info,
|
|
ConstraintPriority priority,
|
|
gboolean check_only)
|
|
{
|
|
if (priority > PRIORITY_SIZE_HINTS_INCREMENTS)
|
|
return TRUE;
|
|
|
|
/* Determine whether constraint applies; exit if it doesn't */
|
|
if (META_WINDOW_MAXIMIZED (window) || window->fullscreen ||
|
|
info->action_type == ACTION_MOVE)
|
|
return TRUE;
|
|
|
|
/* Determine whether constraint is already satisfied; exit if it is */
|
|
int bh, hi, bw, wi, extra_height, extra_width;
|
|
bh = window->size_hints.base_height;
|
|
hi = window->size_hints.height_inc;
|
|
bw = window->size_hints.base_width;
|
|
wi = window->size_hints.width_inc;
|
|
extra_height = (info->current.height - bh) % hi;
|
|
extra_width = (info->current.width - bw) % wi;
|
|
if (window->maximized_horizontally)
|
|
extra_width *= 0;
|
|
if (window->maximized_vertically)
|
|
extra_height *= 0;
|
|
gboolean constraint_already_satisfied =
|
|
(extra_height == 0 && extra_width == 0);
|
|
|
|
if (check_only || constraint_already_satisfied)
|
|
return constraint_already_satisfied;
|
|
|
|
/*** Enforce constraint ***/
|
|
/* Shrink to base + N * inc */
|
|
meta_rectangle_resize_with_gravity (&info->orig,
|
|
&info->current,
|
|
info->resize_gravity,
|
|
info->current.width - extra_width,
|
|
info->current.height - extra_height);
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
constrain_size_limits (MetaWindow *window,
|
|
ConstraintInfo *info,
|
|
ConstraintPriority priority,
|
|
gboolean check_only)
|
|
{
|
|
if (priority > PRIORITY_SIZE_HINTS_LIMITS)
|
|
return TRUE;
|
|
|
|
/* Determine whether constraint applies; exit if it doesn't.
|
|
*
|
|
* Note: The old code didn't apply this constraint for fullscreen or
|
|
* maximized windows--but that seems odd to me. *shrug*
|
|
*/
|
|
if (info->action_type == ACTION_MOVE)
|
|
return TRUE;
|
|
|
|
/* Determine whether constraint is already satisfied; exit if it is */
|
|
MetaRectangle min_size, max_size;
|
|
get_size_limits (window, info->fgeom, FALSE, &min_size, &max_size);
|
|
gboolean too_big =
|
|
!meta_rectangle_could_fit_rect (&info->current, &min_size);
|
|
gboolean too_small =
|
|
!meta_rectangle_could_fit_rect (&max_size, &info->current);
|
|
gboolean constraint_already_satisfied = !too_big && !too_small;
|
|
if (check_only || constraint_already_satisfied)
|
|
return constraint_already_satisfied;
|
|
|
|
/*** Enforce constraint ***/
|
|
int new_width, new_height;
|
|
new_width = CLAMP (info->current.width, min_size.width, max_size.width);
|
|
new_height = CLAMP (info->current.height, min_size.height, max_size.height);
|
|
meta_rectangle_resize_with_gravity (&info->orig,
|
|
&info->current,
|
|
info->resize_gravity,
|
|
new_width,
|
|
new_height);
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
constrain_aspect_ratio (MetaWindow *window,
|
|
ConstraintInfo *info,
|
|
ConstraintPriority priority,
|
|
gboolean check_only)
|
|
{
|
|
if (priority > PRIORITY_ASPECT_RATIO)
|
|
return TRUE;
|
|
|
|
/* Determine whether constraint applies; exit if it doesn't. */
|
|
double minr, maxr;
|
|
minr = window->size_hints.min_aspect.x /
|
|
(double)window->size_hints.min_aspect.y;
|
|
maxr = window->size_hints.max_aspect.x /
|
|
(double)window->size_hints.max_aspect.y;
|
|
gboolean constraints_are_inconsistent = minr > maxr;
|
|
if (constraints_are_inconsistent ||
|
|
META_WINDOW_MAXIMIZED (window) || window->fullscreen ||
|
|
info->action_type == ACTION_MOVE)
|
|
return TRUE;
|
|
|
|
/* Determine whether constraint is already satisfied; exit if it is. We
|
|
* need the following to hold:
|
|
*
|
|
* width
|
|
* minr <= ------ <= maxr
|
|
* height
|
|
*
|
|
* But we need to allow for some slight fudging since width and height
|
|
* are integers instead of floating point numbers (this is particularly
|
|
* important when minr == maxr), so we allow width and height to be off
|
|
* a little bit from strictly satisfying these equations. For just one
|
|
* sided resizing, we have to make the fudge factor a little bigger
|
|
* because of how meta_rectangle_resize_with_gravity treats those as
|
|
* being a resize increment (FIXME: I should handle real resize
|
|
* increments better here...)
|
|
*/
|
|
int fudge;
|
|
switch (info->resize_gravity)
|
|
{
|
|
case WestGravity:
|
|
case NorthGravity:
|
|
case SouthGravity:
|
|
case EastGravity:
|
|
fudge = 2;
|
|
break;
|
|
|
|
case NorthWestGravity:
|
|
case SouthWestGravity:
|
|
case CenterGravity:
|
|
case NorthEastGravity:
|
|
case SouthEastGravity:
|
|
case StaticGravity:
|
|
default:
|
|
fudge = 1;
|
|
break;
|
|
}
|
|
gboolean constraint_already_satisfied =
|
|
info->current.width - (info->current.height * minr ) > -minr*fudge &&
|
|
info->current.width - (info->current.height * maxr ) < maxr*fudge;
|
|
if (check_only || constraint_already_satisfied)
|
|
return constraint_already_satisfied;
|
|
|
|
/*** Enforce constraint ***/
|
|
int new_width, new_height;
|
|
double best_width, best_height;
|
|
double alt_width, alt_height;
|
|
new_width = info->current.width;
|
|
new_height = info->current.height;
|
|
|
|
switch (info->resize_gravity)
|
|
{
|
|
case WestGravity:
|
|
case EastGravity:
|
|
/* Yeah, I suck for doing implicit rounding -- sue me */
|
|
new_height = CLAMP (new_height, new_width / maxr, new_width / minr);
|
|
break;
|
|
|
|
case NorthGravity:
|
|
case SouthGravity:
|
|
/* Yeah, I suck for doing implicit rounding -- sue me */
|
|
new_width = CLAMP (new_width, new_height * minr, new_height * maxr);
|
|
break;
|
|
|
|
case NorthWestGravity:
|
|
case SouthWestGravity:
|
|
case CenterGravity:
|
|
case NorthEastGravity:
|
|
case SouthEastGravity:
|
|
case StaticGravity:
|
|
default:
|
|
/* Find what width would correspond to new_height, and what height would
|
|
* correspond to new_width */
|
|
alt_width = CLAMP (new_width, new_height * minr, new_height * maxr);
|
|
alt_height = CLAMP (new_height, new_width / maxr, new_width / minr);
|
|
|
|
/* The line connecting the points (alt_width, new_height) and
|
|
* (new_width, alt_height) provide a range of
|
|
* valid-for-the-aspect-ratio-constraint sizes. We want the
|
|
* size in that range closest to the value requested, i.e. the
|
|
* point on the line which is closest to the point (new_width,
|
|
* new_height)
|
|
*/
|
|
meta_rectangle_find_linepoint_closest_to_point (alt_width, new_height,
|
|
new_width, alt_height,
|
|
new_width, new_height,
|
|
&best_width, &best_height);
|
|
|
|
/* Yeah, I suck for doing implicit rounding -- sue me */
|
|
new_width = best_width;
|
|
new_height = best_height;
|
|
|
|
break;
|
|
}
|
|
|
|
meta_rectangle_resize_with_gravity (&info->orig,
|
|
&info->current,
|
|
info->resize_gravity,
|
|
new_width,
|
|
new_height);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
do_screen_and_xinerama_relative_constraints (
|
|
MetaWindow *window,
|
|
GList *region_spanning_rectangles,
|
|
ConstraintInfo *info,
|
|
gboolean check_only)
|
|
{
|
|
gboolean exit_early = FALSE;
|
|
|
|
/* First, log some debugging information */
|
|
char spanning_region[1 + 28 * g_list_length (region_spanning_rectangles)];
|
|
(void) spanning_region; /* Avoid stupid & incorrect compiler warnings... */
|
|
meta_topic (META_DEBUG_GEOMETRY,
|
|
"screen/xinerama constraint; region_spanning_rectangles: %s\n",
|
|
meta_rectangle_region_to_string (region_spanning_rectangles, ", ",
|
|
spanning_region));
|
|
|
|
/* Determine whether constraint applies; exit if it doesn't */
|
|
MetaRectangle how_far_it_can_be_smushed, min_size, max_size;
|
|
how_far_it_can_be_smushed = info->current;
|
|
get_size_limits (window, info->fgeom, TRUE, &min_size, &max_size);
|
|
extend_by_frame (&info->current, info->fgeom);
|
|
|
|
if (info->action_type != ACTION_MOVE)
|
|
{
|
|
if (!(info->fixed_directions & FIXED_DIRECTION_X))
|
|
how_far_it_can_be_smushed.width = min_size.width;
|
|
|
|
if (!(info->fixed_directions & FIXED_DIRECTION_Y))
|
|
how_far_it_can_be_smushed.height = min_size.height;
|
|
}
|
|
if (!meta_rectangle_could_fit_in_region (region_spanning_rectangles,
|
|
&how_far_it_can_be_smushed))
|
|
exit_early = TRUE;
|
|
|
|
/* Determine whether constraint is already satisfied; exit if it is */
|
|
gboolean constraint_satisfied =
|
|
meta_rectangle_contained_in_region (region_spanning_rectangles,
|
|
&info->current);
|
|
if (exit_early || constraint_satisfied || check_only)
|
|
{
|
|
unextend_by_frame (&info->current, info->fgeom);
|
|
return constraint_satisfied;
|
|
}
|
|
|
|
/* Enforce constraint */
|
|
|
|
/* Clamp rectangle size for resize or move+resize actions */
|
|
if (info->action_type != ACTION_MOVE)
|
|
meta_rectangle_clamp_to_fit_into_region (region_spanning_rectangles,
|
|
info->fixed_directions,
|
|
&info->current,
|
|
&min_size);
|
|
|
|
if (info->is_user_action && info->action_type == ACTION_RESIZE)
|
|
/* For user resize, clip to the relevant region */
|
|
meta_rectangle_clip_to_region (region_spanning_rectangles,
|
|
info->fixed_directions,
|
|
&info->current);
|
|
else
|
|
/* For everything else, shove the rectangle into the relevant region */
|
|
meta_rectangle_shove_into_region (region_spanning_rectangles,
|
|
info->fixed_directions,
|
|
&info->current);
|
|
|
|
unextend_by_frame (&info->current, info->fgeom);
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
constrain_to_single_xinerama (MetaWindow *window,
|
|
ConstraintInfo *info,
|
|
ConstraintPriority priority,
|
|
gboolean check_only)
|
|
{
|
|
if (priority > PRIORITY_ENTIRELY_VISIBLE_ON_SINGLE_XINERAMA)
|
|
return TRUE;
|
|
|
|
/* Exit early if we know the constraint won't apply--note that this constraint
|
|
* is only meant for normal windows (e.g. we don't want docks to be shoved
|
|
* "onscreen" by their own strut) and we can't apply it to frameless windows
|
|
* or else users will be unable to move windows such as XMMS across xineramas.
|
|
*/
|
|
if (window->type == META_WINDOW_DESKTOP ||
|
|
window->type == META_WINDOW_DOCK ||
|
|
window->screen->n_xinerama_infos == 1 ||
|
|
!window->require_on_single_xinerama ||
|
|
!window->frame ||
|
|
info->is_user_action)
|
|
return TRUE;
|
|
|
|
/* Have a helper function handle the constraint for us */
|
|
gboolean retval =
|
|
do_screen_and_xinerama_relative_constraints (window,
|
|
info->usable_xinerama_region,
|
|
info,
|
|
check_only);
|
|
|
|
/* Free up the data we allocated */
|
|
return retval;
|
|
}
|
|
|
|
static gboolean
|
|
constrain_fully_onscreen (MetaWindow *window,
|
|
ConstraintInfo *info,
|
|
ConstraintPriority priority,
|
|
gboolean check_only)
|
|
{
|
|
if (priority > PRIORITY_ENTIRELY_VISIBLE_ON_WORKAREA)
|
|
return TRUE;
|
|
|
|
/* Exit early if we know the constraint won't apply--note that this constraint
|
|
* is only meant for normal windows (e.g. we don't want docks to be shoved
|
|
* "onscreen" by their own strut).
|
|
*/
|
|
if (window->type == META_WINDOW_DESKTOP ||
|
|
window->type == META_WINDOW_DOCK ||
|
|
!window->require_fully_onscreen ||
|
|
info->is_user_action)
|
|
return TRUE;
|
|
|
|
/* Have a helper function handle the constraint for us */
|
|
gboolean retval =
|
|
do_screen_and_xinerama_relative_constraints (window,
|
|
info->usable_screen_region,
|
|
info,
|
|
check_only);
|
|
|
|
return retval;
|
|
}
|
|
|
|
static gboolean
|
|
constrain_partially_onscreen (MetaWindow *window,
|
|
ConstraintInfo *info,
|
|
ConstraintPriority priority,
|
|
gboolean check_only)
|
|
{
|
|
if (priority > PRIORITY_PARTIALLY_VISIBLE_ON_WORKAREA)
|
|
return TRUE;
|
|
|
|
/* Exit early if we know the constraint won't apply--note that this constraint
|
|
* is only meant for normal windows (e.g. we don't want docks to be shoved
|
|
* "onscreen" by their own strut).
|
|
*/
|
|
if (window->type == META_WINDOW_DESKTOP ||
|
|
window->type == META_WINDOW_DOCK)
|
|
return TRUE;
|
|
|
|
/* Determine how much offscreen things are allowed. We first need to
|
|
* figure out how much must remain on the screen. For that, we use 25%
|
|
* window width/height but clamp to the range of (10,75) pixels. This is
|
|
* somewhat of a seat of my pants random guess at what might look good.
|
|
* Then, the amount that is allowed off is just the window size minus
|
|
* this amount.
|
|
*/
|
|
int horiz_amount = info->current.width / 4;
|
|
int vert_amount = info->current.height / 4;
|
|
horiz_amount = CLAMP (horiz_amount, 10, 75);
|
|
vert_amount = CLAMP (vert_amount, 10, 75);
|
|
horiz_amount = info->current.width - horiz_amount;
|
|
vert_amount = info->current.height - vert_amount;
|
|
|
|
/* Extend the region, have a helper function handle the constraint,
|
|
* then return the region to its original size.
|
|
*/
|
|
meta_rectangle_expand_region (info->usable_screen_region,
|
|
horiz_amount,
|
|
horiz_amount,
|
|
vert_amount,
|
|
vert_amount);
|
|
gboolean retval =
|
|
do_screen_and_xinerama_relative_constraints (window,
|
|
info->usable_screen_region,
|
|
info,
|
|
check_only);
|
|
meta_rectangle_expand_region (info->usable_screen_region,
|
|
-horiz_amount,
|
|
-horiz_amount,
|
|
-vert_amount,
|
|
-vert_amount);
|
|
|
|
return retval;
|
|
}
|