gtk2/gdk/gdksurfaceimpl.c
2019-05-28 20:25:14 +00:00

313 lines
9.5 KiB
C

/* GDK - The GIMP Drawing Kit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include "config.h"
#include "gdksurfaceimpl.h"
#include "gdkinternals.h"
G_DEFINE_TYPE (GdkSurfaceImpl, gdk_surface_impl, G_TYPE_OBJECT);
static gboolean
gdk_surface_impl_beep (GdkSurface *surface)
{
/* FALSE means surfaces can't beep, so the display will be
* made to beep instead. */
return FALSE;
}
static GdkDisplay *
get_display_for_surface (GdkSurface *primary,
GdkSurface *secondary)
{
GdkDisplay *display = gdk_surface_get_display (primary);
if (display)
return display;
display = gdk_surface_get_display (secondary);
if (display)
return display;
g_warning ("no display for surface, using default");
return gdk_display_get_default ();
}
static GdkMonitor *
get_monitor_for_rect (GdkDisplay *display,
const GdkRectangle *rect)
{
gint biggest_area = G_MININT;
GdkMonitor *best_monitor = NULL;
GdkMonitor *monitor;
GdkRectangle workarea;
GdkRectangle intersection;
gint x;
gint y;
gint i;
for (i = 0; i < gdk_display_get_n_monitors (display); i++)
{
monitor = gdk_display_get_monitor (display, i);
gdk_monitor_get_workarea (monitor, &workarea);
if (gdk_rectangle_intersect (&workarea, rect, &intersection))
{
if (intersection.width * intersection.height > biggest_area)
{
biggest_area = intersection.width * intersection.height;
best_monitor = monitor;
}
}
}
if (best_monitor)
return best_monitor;
x = rect->x + rect->width / 2;
y = rect->y + rect->height / 2;
return gdk_display_get_monitor_at_point (display, x, y);
}
static gint
get_anchor_x_sign (GdkGravity anchor)
{
switch (anchor)
{
case GDK_GRAVITY_STATIC:
case GDK_GRAVITY_NORTH_WEST:
case GDK_GRAVITY_WEST:
case GDK_GRAVITY_SOUTH_WEST:
return -1;
default:
case GDK_GRAVITY_NORTH:
case GDK_GRAVITY_CENTER:
case GDK_GRAVITY_SOUTH:
return 0;
case GDK_GRAVITY_NORTH_EAST:
case GDK_GRAVITY_EAST:
case GDK_GRAVITY_SOUTH_EAST:
return 1;
}
}
static gint
get_anchor_y_sign (GdkGravity anchor)
{
switch (anchor)
{
case GDK_GRAVITY_STATIC:
case GDK_GRAVITY_NORTH_WEST:
case GDK_GRAVITY_NORTH:
case GDK_GRAVITY_NORTH_EAST:
return -1;
default:
case GDK_GRAVITY_WEST:
case GDK_GRAVITY_CENTER:
case GDK_GRAVITY_EAST:
return 0;
case GDK_GRAVITY_SOUTH_WEST:
case GDK_GRAVITY_SOUTH:
case GDK_GRAVITY_SOUTH_EAST:
return 1;
}
}
static gint
maybe_flip_position (gint bounds_pos,
gint bounds_size,
gint rect_pos,
gint rect_size,
gint surface_size,
gint rect_sign,
gint surface_sign,
gint offset,
gboolean flip,
gboolean *flipped)
{
gint primary;
gint secondary;
*flipped = FALSE;
primary = rect_pos + (1 + rect_sign) * rect_size / 2 + offset - (1 + surface_sign) * surface_size / 2;
if (!flip || (primary >= bounds_pos && primary + surface_size <= bounds_pos + bounds_size))
return primary;
*flipped = TRUE;
secondary = rect_pos + (1 - rect_sign) * rect_size / 2 - offset - (1 - surface_sign) * surface_size / 2;
if (secondary >= bounds_pos && secondary + surface_size <= bounds_pos + bounds_size)
return secondary;
*flipped = FALSE;
return primary;
}
static void
gdk_surface_impl_move_to_rect (GdkSurface *surface,
const GdkRectangle *rect,
GdkGravity rect_anchor,
GdkGravity surface_anchor,
GdkAnchorHints anchor_hints,
gint rect_anchor_dx,
gint rect_anchor_dy)
{
GdkSurface *transient_for_toplevel;
GdkDisplay *display;
GdkMonitor *monitor;
GdkRectangle bounds;
GdkRectangle root_rect = *rect;
GdkRectangle flipped_rect;
GdkRectangle final_rect;
gboolean flipped_x;
gboolean flipped_y;
/*
* First translate the anchor rect to toplevel coordinates. This is needed
* because not all backends will be able to get root coordinates for
* non-toplevel surfaces.
*/
transient_for_toplevel = surface->transient_for;
gdk_surface_get_root_coords (transient_for_toplevel,
root_rect.x,
root_rect.y,
&root_rect.x,
&root_rect.y);
display = get_display_for_surface (surface, surface->transient_for);
monitor = get_monitor_for_rect (display, &root_rect);
gdk_monitor_get_workarea (monitor, &bounds);
flipped_rect.width = surface->width - surface->shadow_left - surface->shadow_right;
flipped_rect.height = surface->height - surface->shadow_top - surface->shadow_bottom;
flipped_rect.x = maybe_flip_position (bounds.x,
bounds.width,
root_rect.x,
root_rect.width,
flipped_rect.width,
get_anchor_x_sign (rect_anchor),
get_anchor_x_sign (surface_anchor),
rect_anchor_dx,
anchor_hints & GDK_ANCHOR_FLIP_X,
&flipped_x);
flipped_rect.y = maybe_flip_position (bounds.y,
bounds.height,
root_rect.y,
root_rect.height,
flipped_rect.height,
get_anchor_y_sign (rect_anchor),
get_anchor_y_sign (surface_anchor),
rect_anchor_dy,
anchor_hints & GDK_ANCHOR_FLIP_Y,
&flipped_y);
final_rect = flipped_rect;
if (anchor_hints & GDK_ANCHOR_SLIDE_X)
{
if (final_rect.x + final_rect.width > bounds.x + bounds.width)
final_rect.x = bounds.x + bounds.width - final_rect.width;
if (final_rect.x < bounds.x)
final_rect.x = bounds.x;
}
if (anchor_hints & GDK_ANCHOR_SLIDE_Y)
{
if (final_rect.y + final_rect.height > bounds.y + bounds.height)
final_rect.y = bounds.y + bounds.height - final_rect.height;
if (final_rect.y < bounds.y)
final_rect.y = bounds.y;
}
if (anchor_hints & GDK_ANCHOR_RESIZE_X)
{
if (final_rect.x < bounds.x)
{
final_rect.width -= bounds.x - final_rect.x;
final_rect.x = bounds.x;
}
if (final_rect.x + final_rect.width > bounds.x + bounds.width)
final_rect.width = bounds.x + bounds.width - final_rect.x;
}
if (anchor_hints & GDK_ANCHOR_RESIZE_Y)
{
if (final_rect.y < bounds.y)
{
final_rect.height -= bounds.y - final_rect.y;
final_rect.y = bounds.y;
}
if (final_rect.y + final_rect.height > bounds.y + bounds.height)
final_rect.height = bounds.y + bounds.height - final_rect.y;
}
flipped_rect.x -= surface->shadow_left;
flipped_rect.y -= surface->shadow_top;
flipped_rect.width += surface->shadow_left + surface->shadow_right;
flipped_rect.height += surface->shadow_top + surface->shadow_bottom;
final_rect.x -= surface->shadow_left;
final_rect.y -= surface->shadow_top;
final_rect.width += surface->shadow_left + surface->shadow_right;
final_rect.height += surface->shadow_top + surface->shadow_bottom;
if (final_rect.width != surface->width || final_rect.height != surface->height)
gdk_surface_move_resize (surface, final_rect.x, final_rect.y, final_rect.width, final_rect.height);
else
gdk_surface_move (surface, final_rect.x, final_rect.y);
g_signal_emit_by_name (surface,
"moved-to-rect",
&flipped_rect,
&final_rect,
flipped_x,
flipped_y);
}
static void
gdk_surface_impl_class_init (GdkSurfaceImplClass *impl_class)
{
impl_class->beep = gdk_surface_impl_beep;
impl_class->move_to_rect = gdk_surface_impl_move_to_rect;
}
static void
gdk_surface_impl_init (GdkSurfaceImpl *impl)
{
}