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gimp/app/core/gimpundo.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <time.h>
#include <gegl.h>
#include "libgimpbase/gimpbase.h"
#include "core-types.h"
#include "base/temp-buf.h"
#include "config/gimpcoreconfig.h"
#include "gimp.h"
#include "gimpcontext.h"
#include "gimpimage.h"
#include "gimpimage-undo.h"
#include "gimpmarshal.h"
#include "gimpundo.h"
#include "gimpundostack.h"
#include "gimp-intl.h"
enum
{
POP,
FREE,
LAST_SIGNAL
};
enum
{
PROP_0,
PROP_IMAGE,
PROP_TIME,
PROP_UNDO_TYPE,
PROP_DIRTY_MASK
};
static GObject * gimp_undo_constructor (GType type,
guint n_params,
GObjectConstructParam *params);
static void gimp_undo_finalize (GObject *object);
static void gimp_undo_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_undo_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static gint64 gimp_undo_get_memsize (GimpObject *object,
gint64 *gui_size);
static gboolean gimp_undo_get_popup_size (GimpViewable *viewable,
gint width,
gint height,
gboolean dot_for_dot,
gint *popup_width,
gint *popup_height);
static TempBuf * gimp_undo_get_new_preview (GimpViewable *viewable,
GimpContext *context,
gint width,
gint height);
static void gimp_undo_real_pop (GimpUndo *undo,
GimpUndoMode undo_mode,
GimpUndoAccumulator *accum);
static void gimp_undo_real_free (GimpUndo *undo,
GimpUndoMode undo_mode);
static gboolean gimp_undo_create_preview_idle (gpointer data);
static void gimp_undo_create_preview_private (GimpUndo *undo,
GimpContext *context);
G_DEFINE_TYPE (GimpUndo, gimp_undo, GIMP_TYPE_VIEWABLE)
#define parent_class gimp_undo_parent_class
static guint undo_signals[LAST_SIGNAL] = { 0 };
static void
gimp_undo_class_init (GimpUndoClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpObjectClass *gimp_object_class = GIMP_OBJECT_CLASS (klass);
GimpViewableClass *viewable_class = GIMP_VIEWABLE_CLASS (klass);
undo_signals[POP] =
g_signal_new ("pop",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpUndoClass, pop),
NULL, NULL,
gimp_marshal_VOID__ENUM_POINTER,
G_TYPE_NONE, 2,
GIMP_TYPE_UNDO_MODE,
G_TYPE_POINTER);
undo_signals[FREE] =
g_signal_new ("free",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpUndoClass, free),
NULL, NULL,
gimp_marshal_VOID__ENUM,
G_TYPE_NONE, 1,
GIMP_TYPE_UNDO_MODE);
object_class->constructor = gimp_undo_constructor;
object_class->finalize = gimp_undo_finalize;
object_class->set_property = gimp_undo_set_property;
object_class->get_property = gimp_undo_get_property;
gimp_object_class->get_memsize = gimp_undo_get_memsize;
viewable_class->default_stock_id = "gtk-undo";
viewable_class->get_popup_size = gimp_undo_get_popup_size;
viewable_class->get_new_preview = gimp_undo_get_new_preview;
klass->pop = gimp_undo_real_pop;
klass->free = gimp_undo_real_free;
g_object_class_install_property (object_class, PROP_IMAGE,
g_param_spec_object ("image", NULL, NULL,
GIMP_TYPE_IMAGE,
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY));
g_object_class_install_property (object_class, PROP_TIME,
g_param_spec_uint ("time", NULL, NULL,
0, G_MAXUINT, 0,
GIMP_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_UNDO_TYPE,
g_param_spec_enum ("undo-type", NULL, NULL,
GIMP_TYPE_UNDO_TYPE,
GIMP_UNDO_GROUP_NONE,
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY));
g_object_class_install_property (object_class, PROP_DIRTY_MASK,
g_param_spec_flags ("dirty-mask",
NULL, NULL,
GIMP_TYPE_DIRTY_MASK,
GIMP_DIRTY_NONE,
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY));
}
static void
gimp_undo_init (GimpUndo *undo)
{
undo->time = time (NULL);
}
static GObject *
gimp_undo_constructor (GType type,
guint n_params,
GObjectConstructParam *params)
{
GObject *object;
GimpUndo *undo;
object = G_OBJECT_CLASS (parent_class)->constructor (type, n_params, params);
undo = GIMP_UNDO (object);
g_assert (GIMP_IS_IMAGE (undo->image));
return object;
}
static void
gimp_undo_finalize (GObject *object)
{
GimpUndo *undo = GIMP_UNDO (object);
if (undo->preview_idle_id)
{
g_source_remove (undo->preview_idle_id);
undo->preview_idle_id = 0;
}
if (undo->preview)
{
temp_buf_free (undo->preview);
undo->preview = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_undo_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpUndo *undo = GIMP_UNDO (object);
switch (property_id)
{
case PROP_IMAGE:
/* don't ref */
undo->image = g_value_get_object (value);
break;
case PROP_TIME:
undo->time = g_value_get_uint (value);
break;
case PROP_UNDO_TYPE:
undo->undo_type = g_value_get_enum (value);
break;
case PROP_DIRTY_MASK:
undo->dirty_mask = g_value_get_flags (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_undo_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpUndo *undo = GIMP_UNDO (object);
switch (property_id)
{
case PROP_IMAGE:
g_value_set_object (value, undo->image);
break;
case PROP_TIME:
g_value_set_uint (value, undo->time);
break;
case PROP_UNDO_TYPE:
g_value_set_enum (value, undo->undo_type);
break;
case PROP_DIRTY_MASK:
g_value_set_flags (value, undo->dirty_mask);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static gint64
gimp_undo_get_memsize (GimpObject *object,
gint64 *gui_size)
{
GimpUndo *undo = GIMP_UNDO (object);
gint64 memsize = 0;
*gui_size += temp_buf_get_memsize (undo->preview);
return memsize + GIMP_OBJECT_CLASS (parent_class)->get_memsize (object,
gui_size);
}
static gboolean
gimp_undo_get_popup_size (GimpViewable *viewable,
gint width,
gint height,
gboolean dot_for_dot,
gint *popup_width,
gint *popup_height)
{
GimpUndo *undo = GIMP_UNDO (viewable);
if (undo->preview &&
(undo->preview->width > width || undo->preview->height > height))
{
*popup_width = undo->preview->width;
*popup_height = undo->preview->height;
return TRUE;
}
return FALSE;
}
static TempBuf *
gimp_undo_get_new_preview (GimpViewable *viewable,
GimpContext *context,
gint width,
gint height)
{
GimpUndo *undo = GIMP_UNDO (viewable);
if (undo->preview)
{
gint preview_width;
gint preview_height;
gimp_viewable_calc_preview_size (undo->preview->width,
undo->preview->height,
width,
height,
TRUE, 1.0, 1.0,
&preview_width,
&preview_height,
NULL);
if (preview_width < undo->preview->width &&
preview_height < undo->preview->height)
{
return temp_buf_scale (undo->preview, preview_width, preview_height);
}
return temp_buf_copy (undo->preview, NULL);
}
return NULL;
}
static void
gimp_undo_real_pop (GimpUndo *undo,
GimpUndoMode undo_mode,
GimpUndoAccumulator *accum)
{
}
static void
gimp_undo_real_free (GimpUndo *undo,
GimpUndoMode undo_mode)
{
}
void
gimp_undo_pop (GimpUndo *undo,
GimpUndoMode undo_mode,
GimpUndoAccumulator *accum)
{
g_return_if_fail (GIMP_IS_UNDO (undo));
g_return_if_fail (accum != NULL);
if (undo->dirty_mask != GIMP_DIRTY_NONE)
{
switch (undo_mode)
{
case GIMP_UNDO_MODE_UNDO:
gimp_image_clean (undo->image, undo->dirty_mask);
break;
case GIMP_UNDO_MODE_REDO:
gimp_image_dirty (undo->image, undo->dirty_mask);
break;
}
}
g_signal_emit (undo, undo_signals[POP], 0, undo_mode, accum);
}
void
gimp_undo_free (GimpUndo *undo,
GimpUndoMode undo_mode)
{
g_return_if_fail (GIMP_IS_UNDO (undo));
g_signal_emit (undo, undo_signals[FREE], 0, undo_mode);
}
typedef struct _GimpUndoIdle GimpUndoIdle;
struct _GimpUndoIdle
{
GimpUndo *undo;
GimpContext *context;
};
static void
gimp_undo_idle_free (GimpUndoIdle *idle)
{
if (idle->context)
g_object_unref (idle->context);
g_slice_free (GimpUndoIdle, idle);
}
void
gimp_undo_create_preview (GimpUndo *undo,
GimpContext *context,
gboolean create_now)
{
g_return_if_fail (GIMP_IS_UNDO (undo));
g_return_if_fail (context == NULL || GIMP_IS_CONTEXT (context));
if (undo->preview || undo->preview_idle_id)
return;
if (create_now)
{
gimp_undo_create_preview_private (undo, context);
}
else
{
GimpUndoIdle *idle = g_slice_new0 (GimpUndoIdle);
idle->undo = undo;
if (context)
idle->context = g_object_ref (context);
undo->preview_idle_id =
g_idle_add_full (GIMP_VIEWABLE_PRIORITY_IDLE,
gimp_undo_create_preview_idle, idle,
(GDestroyNotify) gimp_undo_idle_free);
}
}
static gboolean
gimp_undo_create_preview_idle (gpointer data)
{
GimpUndoIdle *idle = data;
GimpUndoStack *stack = gimp_image_get_undo_stack (idle->undo->image);
if (idle->undo == gimp_undo_stack_peek (stack))
{
gimp_undo_create_preview_private (idle->undo, idle->context);
}
idle->undo->preview_idle_id = 0;
return FALSE;
}
static void
gimp_undo_create_preview_private (GimpUndo *undo,
GimpContext *context)
{
GimpImage *image = undo->image;
GimpViewable *preview_viewable;
GimpViewSize preview_size;
gint width;
gint height;
switch (undo->undo_type)
{
case GIMP_UNDO_GROUP_IMAGE_QUICK_MASK:
case GIMP_UNDO_GROUP_MASK:
case GIMP_UNDO_MASK:
preview_viewable = GIMP_VIEWABLE (gimp_image_get_mask (image));
break;
default:
preview_viewable = GIMP_VIEWABLE (image);
break;
}
preview_size = image->gimp->config->undo_preview_size;
if (gimp_image_get_width (image) <= preview_size &&
gimp_image_get_height (image) <= preview_size)
{
width = gimp_image_get_width (image);
height = gimp_image_get_height (image);
}
else
{
if (gimp_image_get_width (image) > gimp_image_get_height (image))
{
width = preview_size;
height = MAX (1, (gimp_image_get_height (image) * preview_size /
gimp_image_get_width (image)));
}
else
{
height = preview_size;
width = MAX (1, (gimp_image_get_width (image) * preview_size /
gimp_image_get_height (image)));
}
}
undo->preview = gimp_viewable_get_new_preview (preview_viewable, context,
width, height);
gimp_viewable_invalidate_preview (GIMP_VIEWABLE (undo));
}
void
gimp_undo_refresh_preview (GimpUndo *undo,
GimpContext *context)
{
g_return_if_fail (GIMP_IS_UNDO (undo));
g_return_if_fail (context == NULL || GIMP_IS_CONTEXT (context));
if (undo->preview_idle_id)
return;
if (undo->preview)
{
temp_buf_free (undo->preview);
undo->preview = NULL;
gimp_undo_create_preview (undo, context, FALSE);
}
}
const gchar *
gimp_undo_type_to_name (GimpUndoType type)
{
const gchar *desc;
if (gimp_enum_get_value (GIMP_TYPE_UNDO_TYPE, type, NULL, NULL, &desc, NULL))
return desc;
else
return "";
}
gboolean
gimp_undo_is_weak (GimpUndo *undo)
{
GimpUndoType type;
if (! undo)
return FALSE;
type = undo->undo_type;
switch (undo->undo_type)
{
case GIMP_UNDO_GROUP_ITEM_VISIBILITY:
case GIMP_UNDO_GROUP_ITEM_PROPERTIES:
case GIMP_UNDO_GROUP_LAYER_APPLY_MASK:
case GIMP_UNDO_ITEM_VISIBILITY:
case GIMP_UNDO_LAYER_MODE:
case GIMP_UNDO_LAYER_OPACITY:
case GIMP_UNDO_LAYER_MASK_APPLY:
case GIMP_UNDO_LAYER_MASK_SHOW:
return TRUE;
break;
default:
break;
}
return FALSE;
}
/**
* gimp_undo_get_age:
* @undo:
*
* Return value: the time in seconds since this undo item was created
*/
gint
gimp_undo_get_age (GimpUndo *undo)
{
guint now = time (NULL);
g_return_val_if_fail (GIMP_IS_UNDO (undo), 0);
g_return_val_if_fail (now >= undo->time, 0);
return now - undo->time;
}
/**
* gimp_undo_reset_age:
* @undo:
*
* Changes the creation time of this undo item to the current time.
*/
void
gimp_undo_reset_age (GimpUndo *undo)
{
g_return_if_fail (GIMP_IS_UNDO (undo));
undo->time = time (NULL);
g_object_notify (G_OBJECT (undo), "time");
}
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