AlderconeStudio/PIKApp
AlderconeStudio
/
PIKApp
0
0
Fork 0
Code Issues 1 Pull Requests Packages Projects Releases 1 Wiki Activity
PIKApp/app/core/pikaitem.c

2772 lines
82 KiB
C
Raw Normal View History

Initial checkin of Pika from heckimp
2023-09-26 00:35:21 +02:00
/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* 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 <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gegl.h>
#include "libpikabase/pikabase.h"
#include "libpikamath/pikamath.h"
#include "core-types.h"
#include "pika.h"
#include "pika-parasites.h"
#include "pikachannel.h"
#include "pikacontainer.h"
#include "pikaidtable.h"
#include "pikaimage.h"
#include "pikaimage-undo.h"
#include "pikaimage-undo-push.h"
#include "pikaitem.h"
#include "pikaitem-preview.h"
#include "pikaitemtree.h"
#include "pikalist.h"
#include "pikaparasitelist.h"
#include "pikaprogress.h"
#include "pikastrokeoptions.h"
#include "paint/pikapaintoptions.h"
#include "pika-intl.h"
enum
{
REMOVED,
VISIBILITY_CHANGED,
COLOR_TAG_CHANGED,
LOCK_CONTENT_CHANGED,
LOCK_POSITION_CHANGED,
LOCK_VISIBILITY_CHANGED,
LAST_SIGNAL
};
enum
{
PROP_0,
PROP_IMAGE,
PROP_ID,
PROP_WIDTH,
PROP_HEIGHT,
PROP_OFFSET_X,
PROP_OFFSET_Y,
PROP_VISIBLE,
PROP_COLOR_TAG,
PROP_LOCK_CONTENT,
PROP_LOCK_POSITION,
PROP_LOCK_VISIBILITY,
N_PROPS
};
typedef struct _PikaItemPrivate PikaItemPrivate;
struct _PikaItemPrivate
{
gint ID; /* provides a unique ID */
guint32 tattoo; /* provides a permanent ID */
PikaImage *image; /* item owner */
PikaParasiteList *parasites; /* Plug-in parasite data */
gint width, height; /* size in pixels */
gint offset_x, offset_y; /* pixel offset in image */
guint visible : 1; /* item visibility */
guint bind_visible_to_active : 1; /* visibility bound to active */
guint lock_content : 1; /* content editability */
guint lock_position : 1; /* content movability */
guint lock_visibility : 1; /* automatic visibility change */
guint removed : 1; /* removed from the image? */
PikaColorTag color_tag; /* color tag */
GList *offset_nodes; /* offset nodes to manage */
};
#define GET_PRIVATE(item) ((PikaItemPrivate *) pika_item_get_instance_private ((PikaItem *) (item)))
/* local function prototypes */
static void pika_item_constructed (GObject *object);
static void pika_item_finalize (GObject *object);
static void pika_item_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void pika_item_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static gint64 pika_item_get_memsize (PikaObject *object,
gint64 *gui_size);
static gboolean pika_item_real_is_content_locked (PikaItem *item,
PikaItem **locked_item);
static gboolean pika_item_real_is_position_locked (PikaItem *item,
PikaItem **locked_item,
gboolean check_children);
static gboolean pika_item_real_is_visibility_locked (PikaItem *item,
PikaItem **locked_item);
static gboolean pika_item_real_bounds (PikaItem *item,
gdouble *x,
gdouble *y,
gdouble *width,
gdouble *height);
static PikaItem * pika_item_real_duplicate (PikaItem *item,
GType new_type);
static void pika_item_real_convert (PikaItem *item,
PikaImage *dest_image,
GType old_type);
static gboolean pika_item_real_rename (PikaItem *item,
const gchar *new_name,
const gchar *undo_desc,
GError **error);
static void pika_item_real_start_transform (PikaItem *item,
gboolean push_undo);
static void pika_item_real_end_transform (PikaItem *item,
gboolean push_undo);
static void pika_item_real_translate (PikaItem *item,
gdouble offset_x,
gdouble offset_y,
gboolean push_undo);
static void pika_item_real_scale (PikaItem *item,
gint new_width,
gint new_height,
gint new_offset_x,
gint new_offset_y,
PikaInterpolationType interpolation,
PikaProgress *progress);
static void pika_item_real_resize (PikaItem *item,
PikaContext *context,
PikaFillType fill_type,
gint new_width,
gint new_height,
gint offset_x,
gint offset_y);
static PikaTransformResize
pika_item_real_get_clip (PikaItem *item,
PikaTransformResize clip_result);
G_DEFINE_TYPE_WITH_PRIVATE (PikaItem, pika_item, PIKA_TYPE_FILTER)
#define parent_class pika_item_parent_class
static guint pika_item_signals[LAST_SIGNAL] = { 0 };
static GParamSpec *pika_item_props[N_PROPS] = { NULL, };
static void
pika_item_class_init (PikaItemClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
PikaObjectClass *pika_object_class = PIKA_OBJECT_CLASS (klass);
PikaViewableClass *viewable_class = PIKA_VIEWABLE_CLASS (klass);
pika_item_signals[REMOVED] =
g_signal_new ("removed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (PikaItemClass, removed),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
pika_item_signals[VISIBILITY_CHANGED] =
g_signal_new ("visibility-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (PikaItemClass, visibility_changed),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
pika_item_signals[COLOR_TAG_CHANGED] =
g_signal_new ("color-tag-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (PikaItemClass, color_tag_changed),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
pika_item_signals[LOCK_CONTENT_CHANGED] =
g_signal_new ("lock-content-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (PikaItemClass, lock_content_changed),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
pika_item_signals[LOCK_POSITION_CHANGED] =
g_signal_new ("lock-position-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (PikaItemClass, lock_position_changed),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
pika_item_signals[LOCK_VISIBILITY_CHANGED] =
g_signal_new ("lock-visibility-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (PikaItemClass, lock_visibility_changed),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
object_class->constructed = pika_item_constructed;
object_class->finalize = pika_item_finalize;
object_class->set_property = pika_item_set_property;
object_class->get_property = pika_item_get_property;
pika_object_class->get_memsize = pika_item_get_memsize;
viewable_class->name_editable = TRUE;
viewable_class->get_preview_size = pika_item_get_preview_size;
viewable_class->get_popup_size = pika_item_get_popup_size;
klass->removed = NULL;
klass->visibility_changed = NULL;
klass->color_tag_changed = NULL;
klass->lock_content_changed = NULL;
klass->lock_position_changed = NULL;
klass->lock_visibility_changed = NULL;
klass->unset_removed = NULL;
klass->is_attached = NULL;
klass->is_content_locked = pika_item_real_is_content_locked;
klass->is_position_locked = pika_item_real_is_position_locked;
klass->is_visibility_locked = pika_item_real_is_visibility_locked;
klass->get_tree = NULL;
klass->bounds = pika_item_real_bounds;
klass->duplicate = pika_item_real_duplicate;
klass->convert = pika_item_real_convert;
klass->rename = pika_item_real_rename;
klass->start_move = NULL;
klass->end_move = NULL;
klass->start_transform = pika_item_real_start_transform;
klass->end_transform = pika_item_real_end_transform;
klass->translate = pika_item_real_translate;
klass->scale = pika_item_real_scale;
klass->resize = pika_item_real_resize;
klass->flip = NULL;
klass->rotate = NULL;
klass->transform = NULL;
klass->get_clip = pika_item_real_get_clip;
klass->fill = NULL;
klass->stroke = NULL;
klass->to_selection = NULL;
klass->default_name = NULL;
klass->rename_desc = NULL;
klass->translate_desc = NULL;
klass->scale_desc = NULL;
klass->resize_desc = NULL;
klass->flip_desc = NULL;
klass->rotate_desc = NULL;
klass->transform_desc = NULL;
klass->fill_desc = NULL;
klass->stroke_desc = NULL;
pika_item_props[PROP_IMAGE] = g_param_spec_object ("image", NULL, NULL,
PIKA_TYPE_IMAGE,
PIKA_PARAM_READWRITE |
G_PARAM_CONSTRUCT);
pika_item_props[PROP_ID] = g_param_spec_int ("id", NULL, NULL,
0, G_MAXINT, 0,
PIKA_PARAM_READABLE);
pika_item_props[PROP_WIDTH] = g_param_spec_int ("width", NULL, NULL,
1, PIKA_MAX_IMAGE_SIZE, 1,
PIKA_PARAM_READABLE);
pika_item_props[PROP_HEIGHT] = g_param_spec_int ("height", NULL, NULL,
1, PIKA_MAX_IMAGE_SIZE, 1,
PIKA_PARAM_READABLE);
pika_item_props[PROP_OFFSET_X] = g_param_spec_int ("offset-x", NULL, NULL,
-PIKA_MAX_IMAGE_SIZE,
PIKA_MAX_IMAGE_SIZE, 0,
PIKA_PARAM_READABLE);
pika_item_props[PROP_OFFSET_Y] = g_param_spec_int ("offset-y", NULL, NULL,
-PIKA_MAX_IMAGE_SIZE,
PIKA_MAX_IMAGE_SIZE, 0,
PIKA_PARAM_READABLE);
pika_item_props[PROP_VISIBLE] = g_param_spec_boolean ("visible", NULL, NULL,
TRUE,
PIKA_PARAM_READABLE);
pika_item_props[PROP_COLOR_TAG] = g_param_spec_enum ("color-tag", NULL, NULL,
PIKA_TYPE_COLOR_TAG,
PIKA_COLOR_TAG_NONE,
PIKA_PARAM_READABLE);
pika_item_props[PROP_LOCK_CONTENT] = g_param_spec_boolean ("lock-content",
NULL, NULL,
FALSE,
PIKA_PARAM_READABLE);
pika_item_props[PROP_LOCK_POSITION] = g_param_spec_boolean ("lock-position",
NULL, NULL,
FALSE,
PIKA_PARAM_READABLE);
pika_item_props[PROP_LOCK_VISIBILITY] = g_param_spec_boolean ("lock-visibility",
NULL, NULL,
FALSE,
PIKA_PARAM_READABLE);
g_object_class_install_properties (object_class, N_PROPS, pika_item_props);
}
static void
pika_item_init (PikaItem *item)
{
PikaItemPrivate *private = GET_PRIVATE (item);
g_object_force_floating (G_OBJECT (item));
private->parasites = pika_parasite_list_new ();
private->visible = TRUE;
private->bind_visible_to_active = TRUE;
}
static void
pika_item_constructed (GObject *object)
{
PikaItemPrivate *private = GET_PRIVATE (object);
G_OBJECT_CLASS (parent_class)->constructed (object);
pika_assert (PIKA_IS_IMAGE (private->image));
pika_assert (private->ID != 0);
}
static void
pika_item_finalize (GObject *object)
{
PikaItemPrivate *private = GET_PRIVATE (object);
if (private->offset_nodes)
{
g_list_free_full (private->offset_nodes,
(GDestroyNotify) g_object_unref);
private->offset_nodes = NULL;
}
if (private->image && private->image->pika)
{
pika_id_table_remove (private->image->pika->item_table, private->ID);
private->image = NULL;
}
g_clear_object (&private->parasites);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
pika_item_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
PikaItem *item = PIKA_ITEM (object);
switch (property_id)
{
case PROP_IMAGE:
pika_item_set_image (item, g_value_get_object (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
pika_item_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
PikaItemPrivate *private = GET_PRIVATE (object);
switch (property_id)
{
case PROP_IMAGE:
g_value_set_object (value, private->image);
break;
case PROP_ID:
g_value_set_int (value, private->ID);
break;
case PROP_WIDTH:
g_value_set_int (value, private->width);
break;
case PROP_HEIGHT:
g_value_set_int (value, private->height);
break;
case PROP_OFFSET_X:
g_value_set_int (value, private->offset_x);
break;
case PROP_OFFSET_Y:
g_value_set_int (value, private->offset_y);
break;
case PROP_VISIBLE:
g_value_set_boolean (value, private->visible);
break;
case PROP_COLOR_TAG:
g_value_set_enum (value, private->color_tag);
break;
case PROP_LOCK_CONTENT:
g_value_set_boolean (value, private->lock_content);
break;
case PROP_LOCK_POSITION:
g_value_set_boolean (value, private->lock_position);
break;
case PROP_LOCK_VISIBILITY:
g_value_set_boolean (value, private->lock_visibility);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static gint64
pika_item_get_memsize (PikaObject *object,
gint64 *gui_size)
{
PikaItemPrivate *private = GET_PRIVATE (object);
gint64 memsize = 0;
memsize += pika_object_get_memsize (PIKA_OBJECT (private->parasites),
gui_size);
return memsize + PIKA_OBJECT_CLASS (parent_class)->get_memsize (object,
gui_size);
}
static gboolean
pika_item_real_is_content_locked (PikaItem *item,
PikaItem **locked_item)
{
PikaItem *parent = pika_item_get_parent (item);
if (GET_PRIVATE (item)->lock_content)
{
if (locked_item)
*locked_item = item;
}
else if (parent && pika_item_is_content_locked (parent, locked_item))
{
return TRUE;
}
return GET_PRIVATE (item)->lock_content;
}
static gboolean
pika_item_real_is_position_locked (PikaItem *item,
PikaItem **locked_item,
gboolean check_children)
{
PikaItem *parent = pika_item_get_parent (item);
if (GET_PRIVATE (item)->lock_position)
{
if (locked_item)
*locked_item = item;
}
else if (parent &&
PIKA_ITEM_GET_CLASS (item)->is_position_locked (parent, locked_item, FALSE))
{
return TRUE;
}
return GET_PRIVATE (item)->lock_position;
}
static gboolean
pika_item_real_is_visibility_locked (PikaItem *item,
PikaItem **locked_item)
{
/* Unlike other locks, the visibility lock does not propagate from
* parents or children.
*/
if (GET_PRIVATE (item)->lock_visibility && locked_item)
*locked_item = item;
return GET_PRIVATE (item)->lock_visibility;
}
static gboolean
pika_item_real_bounds (PikaItem *item,
gdouble *x,
gdouble *y,
gdouble *width,
gdouble *height)
{
PikaItemPrivate *private = GET_PRIVATE (item);
*x = 0;
*y = 0;
*width = private->width;
*height = private->height;
return TRUE;
}
static PikaItem *
pika_item_real_duplicate (PikaItem *item,
GType new_type)
{
PikaItemPrivate *private;
PikaItem *new_item;
gchar *new_name;
g_return_val_if_fail (PIKA_IS_ITEM (item), NULL);
private = GET_PRIVATE (item);
g_return_val_if_fail (PIKA_IS_IMAGE (private->image), NULL);
g_return_val_if_fail (g_type_is_a (new_type, PIKA_TYPE_ITEM), NULL);
/* formulate the new name */
{
const gchar *name;
gint len;
name = pika_object_get_name (item);
g_return_val_if_fail (name != NULL, NULL);
len = strlen (_("copy"));
if ((strlen (name) >= len &&
strcmp (&name[strlen (name) - len], _("copy")) == 0) ||
g_regex_match_simple ("#([0-9]+)\\s*$", name, 0, 0))
{
/* don't have redundant "copy"s */
new_name = g_strdup (name);
}
else
{
new_name = g_strdup_printf (_("%s copy"), name);
}
}
new_item = pika_item_new (new_type,
pika_item_get_image (item), new_name,
private->offset_x, private->offset_y,
pika_item_get_width (item),
pika_item_get_height (item));
g_free (new_name);
pika_viewable_set_expanded (PIKA_VIEWABLE (new_item),
pika_viewable_get_expanded (PIKA_VIEWABLE (item)));
g_object_unref (GET_PRIVATE (new_item)->parasites);
GET_PRIVATE (new_item)->parasites = pika_parasite_list_copy (private->parasites);
pika_item_set_visible (new_item, pika_item_get_visible (item), FALSE);
pika_item_set_color_tag (new_item, pika_item_get_color_tag (item), FALSE);
if (pika_item_can_lock_content (new_item))
pika_item_set_lock_content (new_item, pika_item_get_lock_content (item),
FALSE);
if (pika_item_can_lock_position (new_item))
pika_item_set_lock_position (new_item, pika_item_get_lock_position (item),
FALSE);
if (pika_item_can_lock_visibility (new_item))
pika_item_set_lock_visibility (new_item, pika_item_get_lock_visibility (item),
FALSE);
return new_item;
}
static void
pika_item_real_convert (PikaItem *item,
PikaImage *dest_image,
GType old_type)
{
pika_item_set_image (item, dest_image);
}
static gboolean
pika_item_real_rename (PikaItem *item,
const gchar *new_name,
const gchar *undo_desc,
GError **error)
{
if (pika_item_is_attached (item))
pika_item_tree_rename_item (pika_item_get_tree (item), item,
new_name, TRUE, undo_desc);
else
pika_object_set_name (PIKA_OBJECT (item), new_name);
return TRUE;
}
static void
pika_item_real_translate (PikaItem *item,
gdouble offset_x,
gdouble offset_y,
gboolean push_undo)
{
PikaItemPrivate *private = GET_PRIVATE (item);
pika_item_set_offset (item,
private->offset_x + SIGNED_ROUND (offset_x),
private->offset_y + SIGNED_ROUND (offset_y));
}
static void
pika_item_real_start_transform (PikaItem *item,
gboolean push_undo)
{
pika_item_start_move (item, push_undo);
}
static void
pika_item_real_end_transform (PikaItem *item,
gboolean push_undo)
{
pika_item_end_move (item, push_undo);
}
static void
pika_item_real_scale (PikaItem *item,
gint new_width,
gint new_height,
gint new_offset_x,
gint new_offset_y,
PikaInterpolationType interpolation,
PikaProgress *progress)
{
PikaItemPrivate *private = GET_PRIVATE (item);
if (private->width != new_width)
{
private->width = new_width;
g_object_notify_by_pspec (G_OBJECT (item), pika_item_props[PROP_WIDTH]);
}
if (private->height != new_height)
{
private->height = new_height;
g_object_notify_by_pspec (G_OBJECT (item), pika_item_props[PROP_HEIGHT]);
}
pika_item_set_offset (item, new_offset_x, new_offset_y);
}
static void
pika_item_real_resize (PikaItem *item,
PikaContext *context,
PikaFillType fill_type,
gint new_width,
gint new_height,
gint offset_x,
gint offset_y)
{
PikaItemPrivate *private = GET_PRIVATE (item);
if (private->width != new_width)
{
private->width = new_width;
g_object_notify_by_pspec (G_OBJECT (item), pika_item_props[PROP_WIDTH]);
}
if (private->height != new_height)
{
private->height = new_height;
g_object_notify_by_pspec (G_OBJECT (item), pika_item_props[PROP_HEIGHT]);
}
pika_item_set_offset (item,
private->offset_x - offset_x,
private->offset_y - offset_y);
}
static PikaTransformResize
pika_item_real_get_clip (PikaItem *item,
PikaTransformResize clip_result)
{
if (pika_item_get_lock_position (item))
return PIKA_TRANSFORM_RESIZE_CLIP;
else
return clip_result;
}
/* public functions */
/**
* pika_item_new:
* @type: The new item's type.
* @image: The new item's #PikaImage.
* @name: The name to assign the item.
* @offset_x: The X offset to assign the item.
* @offset_y: The Y offset to assign the item.
* @width: The width to assign the item.
* @height: The height to assign the item.
*
* Returns: The newly created item.
*/
PikaItem *
pika_item_new (GType type,
PikaImage *image,
const gchar *name,
gint offset_x,
gint offset_y,
gint width,
gint height)
{
PikaItem *item;
PikaItemPrivate *private;
g_return_val_if_fail (g_type_is_a (type, PIKA_TYPE_ITEM), NULL);
g_return_val_if_fail (PIKA_IS_IMAGE (image), NULL);
g_return_val_if_fail (width > 0 && height > 0, NULL);
item = g_object_new (type,
"image", image,
NULL);
private = GET_PRIVATE (item);
private->width = width;
private->height = height;
pika_item_set_offset (item, offset_x, offset_y);
if (name && strlen (name))
pika_object_set_name (PIKA_OBJECT (item), name);
else
pika_object_set_static_name (PIKA_OBJECT (item),
PIKA_ITEM_GET_CLASS (item)->default_name);
return item;
}
/**
* pika_item_remove:
* @item: the #PikaItem to remove.
*
* This function sets the 'removed' flag on @item to %TRUE, and emits
* a 'removed' signal on the item.
*/
void
pika_item_removed (PikaItem *item)
{
PikaContainer *children;
g_return_if_fail (PIKA_IS_ITEM (item));
GET_PRIVATE (item)->removed = TRUE;
children = pika_viewable_get_children (PIKA_VIEWABLE (item));
if (children)
pika_container_foreach (children, (GFunc) pika_item_removed, NULL);
g_signal_emit (item, pika_item_signals[REMOVED], 0);
}
/**
* pika_item_is_removed:
* @item: the #PikaItem to check.
*
* Returns: %TRUE if the 'removed' flag is set for @item, %FALSE otherwise.
*/
gboolean
pika_item_is_removed (PikaItem *item)
{
g_return_val_if_fail (PIKA_IS_ITEM (item), FALSE);
return GET_PRIVATE (item)->removed;
}
/**
* pika_item_unset_removed:
* @item: a #PikaItem which was on the undo stack
*
* Unsets an item's "removed" state. This function is called when an
* item was on the undo stack and is added back to its parent
* container during and undo or redo. It must never be called from
* anywhere else.
**/
void
pika_item_unset_removed (PikaItem *item)
{
PikaContainer *children;
g_return_if_fail (PIKA_IS_ITEM (item));
g_return_if_fail (pika_item_is_removed (item));
GET_PRIVATE (item)->removed = FALSE;
children = pika_viewable_get_children (PIKA_VIEWABLE (item));
if (children)
pika_container_foreach (children, (GFunc) pika_item_unset_removed, NULL);
if (PIKA_ITEM_GET_CLASS (item)->unset_removed)
PIKA_ITEM_GET_CLASS (item)->unset_removed (item);
}
/**
* pika_item_is_attached:
* @item: The #PikaItem to check.
*
* Returns: %TRUE if the item is attached to an image, %FALSE otherwise.
*/
gboolean
pika_item_is_attached (PikaItem *item)
{
PikaImage *image;
PikaItem *parent;
g_return_val_if_fail (PIKA_IS_ITEM (item), FALSE);
image = pika_item_get_image (item);
if (image != NULL && pika_image_is_hidden_item (image, item))
return TRUE;
parent = pika_item_get_parent (item);
if (parent)
return pika_item_is_attached (parent);
return PIKA_ITEM_GET_CLASS (item)->is_attached (item);
}
PikaItem *
pika_item_get_parent (PikaItem *item)
{
g_return_val_if_fail (PIKA_IS_ITEM (item), NULL);
return PIKA_ITEM (pika_viewable_get_parent (PIKA_VIEWABLE (item)));
}
PikaItemTree *
pika_item_get_tree (PikaItem *item)
{
g_return_val_if_fail (PIKA_IS_ITEM (item), NULL);
if (PIKA_ITEM_GET_CLASS (item)->get_tree)
return PIKA_ITEM_GET_CLASS (item)->get_tree (item);
return NULL;
}
PikaContainer *
pika_item_get_container (PikaItem *item)
{
PikaItem *parent;
PikaItemTree *tree;
g_return_val_if_fail (PIKA_IS_ITEM (item), NULL);
parent = pika_item_get_parent (item);
if (parent)
return pika_viewable_get_children (PIKA_VIEWABLE (parent));
tree = pika_item_get_tree (item);
if (tree)
return tree->container;
return NULL;
}
GList *
pika_item_get_container_iter (PikaItem *item)
{
PikaContainer *container;
g_return_val_if_fail (PIKA_IS_ITEM (item), NULL);
container = pika_item_get_container (item);
if (container)
return PIKA_LIST (container)->queue->head;
return NULL;
}
gint
pika_item_get_index (PikaItem *item)
{
PikaContainer *container;
g_return_val_if_fail (PIKA_IS_ITEM (item), -1);
container = pika_item_get_container (item);
if (container)
return pika_container_get_child_index (container, PIKA_OBJECT (item));
return -1;
}
GList *
pika_item_get_path (PikaItem *item)
{
PikaContainer *container;
GList *path = NULL;
g_return_val_if_fail (PIKA_IS_ITEM (item), NULL);
g_return_val_if_fail (pika_item_is_attached (item), NULL);
container = pika_item_get_container (item);
while (container)
{
guint32 index = pika_container_get_child_index (container,
PIKA_OBJECT (item));
path = g_list_prepend (path, GUINT_TO_POINTER (index));
item = pika_item_get_parent (item);
if (item)
container = pika_item_get_container (item);
else
container = NULL;
}
return path;
}
gboolean
pika_item_bounds (PikaItem *item,
gint *x,
gint *y,
gint *width,
gint *height)
{
gdouble tmp_x, tmp_y, tmp_width, tmp_height;
gboolean retval;
g_return_val_if_fail (PIKA_IS_ITEM (item), FALSE);
retval = PIKA_ITEM_GET_CLASS (item)->bounds (item,
&tmp_x, &tmp_y,
&tmp_width, &tmp_height);
if (x) *x = floor (tmp_x);
if (y) *y = floor (tmp_y);
if (width) *width = ceil (tmp_x + tmp_width) - floor (tmp_x);
if (height) *height = ceil (tmp_y + tmp_height) - floor (tmp_y);
return retval;
}
gboolean
pika_item_bounds_f (PikaItem *item,
gdouble *x,
gdouble *y,
gdouble *width,
gdouble *height)
{
gdouble tmp_x, tmp_y, tmp_width, tmp_height;
gboolean retval;
g_return_val_if_fail (PIKA_IS_ITEM (item), FALSE);
retval = PIKA_ITEM_GET_CLASS (item)->bounds (item,
&tmp_x, &tmp_y,
&tmp_width, &tmp_height);
if (x) *x = tmp_x;
if (y) *y = tmp_y;
if (width) *width = tmp_width;
if (height) *height = tmp_height;
return retval;
}
/**
* pika_item_duplicate:
* @item: The #PikaItem to duplicate.
* @new_type: The type to make the new item.
*
* Returns: the newly created item.
*/
PikaItem *
pika_item_duplicate (PikaItem *item,
GType new_type)
{
PikaItemPrivate *private;
g_return_val_if_fail (PIKA_IS_ITEM (item), NULL);
private = GET_PRIVATE (item);
g_return_val_if_fail (PIKA_IS_IMAGE (private->image), NULL);
g_return_val_if_fail (g_type_is_a (new_type, PIKA_TYPE_ITEM), NULL);
return PIKA_ITEM_GET_CLASS (item)->duplicate (item, new_type);
}
/**
* pika_item_convert:
* @item: The #PikaItem to convert.
* @dest_image: The #PikaImage in which to place the converted item.
* @new_type: The type to convert the item to.
*
* Returns: the new item that results from the conversion.
*/
PikaItem *
pika_item_convert (PikaItem *item,
PikaImage *dest_image,
GType new_type)
{
PikaItem *new_item;
GType old_type;
g_return_val_if_fail (PIKA_IS_ITEM (item), NULL);
g_return_val_if_fail (PIKA_IS_IMAGE (GET_PRIVATE (item)->image), NULL);
g_return_val_if_fail (PIKA_IS_IMAGE (dest_image), NULL);
g_return_val_if_fail (g_type_is_a (new_type, PIKA_TYPE_ITEM), NULL);
old_type = G_TYPE_FROM_INSTANCE (item);
new_item = pika_item_duplicate (item, new_type);
if (new_item)
PIKA_ITEM_GET_CLASS (new_item)->convert (new_item, dest_image, old_type);
return new_item;
}
/**
* pika_item_rename:
* @item: The #PikaItem to rename.
* @new_name: The new name to give the item.
* @error: Return location for error message.
*
* This function assigns a new name to the item, if the desired name is
* different from the name it already has, and pushes an entry onto the
* undo stack for the item's image. If @new_name is NULL or empty, the
* default name for the item's class is used. If the name is changed,
* the PikaObject::name-changed signal is emitted for the item.
*
* Returns: %TRUE if the @item could be renamed, %FALSE otherwise.
*/
gboolean
pika_item_rename (PikaItem *item,
const gchar *new_name,
GError **error)
{
PikaItemClass *item_class;
g_return_val_if_fail (PIKA_IS_ITEM (item), FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
item_class = PIKA_ITEM_GET_CLASS (item);
if (! new_name || ! *new_name)
new_name = item_class->default_name;
if (strcmp (new_name, pika_object_get_name (item)))
return item_class->rename (item, new_name, item_class->rename_desc, error);
return TRUE;
}
/**
* pika_item_get_width:
* @item: The #PikaItem to check.
*
* Returns: The width of the item.
*/
gint
pika_item_get_width (PikaItem *item)
{
g_return_val_if_fail (PIKA_IS_ITEM (item), -1);
return GET_PRIVATE (item)->width;
}
/**
* pika_item_get_height:
* @item: The #PikaItem to check.
*
* Returns: The height of the item.
*/
gint
pika_item_get_height (PikaItem *item)
{
g_return_val_if_fail (PIKA_IS_ITEM (item), -1);
return GET_PRIVATE (item)->height;
}
void
pika_item_set_size (PikaItem *item,
gint width,
gint height)
{
PikaItemPrivate *private;
g_return_if_fail (PIKA_IS_ITEM (item));
private = GET_PRIVATE (item);
if (private->width != width ||
private->height != height)
{
g_object_freeze_notify (G_OBJECT (item));
if (private->width != width)
{
private->width = width;
g_object_notify_by_pspec (G_OBJECT (item),
pika_item_props[PROP_WIDTH]);
}
if (private->height != height)
{
private->height = height;
g_object_notify_by_pspec (G_OBJECT (item),
pika_item_props[PROP_HEIGHT]);
}
g_object_thaw_notify (G_OBJECT (item));
pika_viewable_size_changed (PIKA_VIEWABLE (item));
}
}
/**
* pika_item_get_offset:
* @item: The #PikaItem to check.
* @offset_x: (out) (optional): Return location for the item's X offset.
* @offset_y: (out) (optional): Return location for the item's Y offset.
*
* Reveals the X and Y offsets of the item.
*/
void
pika_item_get_offset (PikaItem *item,
gint *offset_x,
gint *offset_y)
{
PikaItemPrivate *private;
g_return_if_fail (PIKA_IS_ITEM (item));
private = GET_PRIVATE (item);
if (offset_x) *offset_x = private->offset_x;
if (offset_y) *offset_y = private->offset_y;
}
void
pika_item_set_offset (PikaItem *item,
gint offset_x,
gint offset_y)
{
PikaItemPrivate *private;
GList *list;
g_return_if_fail (PIKA_IS_ITEM (item));
private = GET_PRIVATE (item);
g_object_freeze_notify (G_OBJECT (item));
if (private->offset_x != offset_x)
{
private->offset_x = offset_x;
g_object_notify_by_pspec (G_OBJECT (item),
pika_item_props[PROP_OFFSET_X]);
}
if (private->offset_y != offset_y)
{
private->offset_y = offset_y;
g_object_notify_by_pspec (G_OBJECT (item),
pika_item_props[PROP_OFFSET_Y]);
}
for (list = private->offset_nodes; list; list = g_list_next (list))
{
GeglNode *node = list->data;
gegl_node_set (node,
"x", (gdouble) private->offset_x,
"y", (gdouble) private->offset_y,
NULL);
}
g_object_thaw_notify (G_OBJECT (item));
}
gint
pika_item_get_offset_x (PikaItem *item)
{
g_return_val_if_fail (PIKA_IS_ITEM (item), 0);
return GET_PRIVATE (item)->offset_x;
}
gint
pika_item_get_offset_y (PikaItem *item)
{
g_return_val_if_fail (PIKA_IS_ITEM (item), 0);
return GET_PRIVATE (item)->offset_y;
}
void
pika_item_start_move (PikaItem *item,
gboolean push_undo)
{
g_return_if_fail (PIKA_IS_ITEM (item));
if (PIKA_ITEM_GET_CLASS (item)->start_move)
PIKA_ITEM_GET_CLASS (item)->start_move (item, push_undo);
}
void
pika_item_end_move (PikaItem *item,
gboolean push_undo)
{
g_return_if_fail (PIKA_IS_ITEM (item));
if (PIKA_ITEM_GET_CLASS (item)->end_move)
PIKA_ITEM_GET_CLASS (item)->end_move (item, push_undo);
}
void
pika_item_start_transform (PikaItem *item,
gboolean push_undo)
{
g_return_if_fail (PIKA_IS_ITEM (item));
if (PIKA_ITEM_GET_CLASS (item)->start_transform)
PIKA_ITEM_GET_CLASS (item)->start_transform (item, push_undo);
}
void
pika_item_end_transform (PikaItem *item,
gboolean push_undo)
{
g_return_if_fail (PIKA_IS_ITEM (item));
if (PIKA_ITEM_GET_CLASS (item)->end_transform)
PIKA_ITEM_GET_CLASS (item)->end_transform (item, push_undo);
}
/**
* pika_item_translate:
* @item: The #PikaItem to move.
* @offset_x: Increment to the X offset of the item.
* @offset_y: Increment to the Y offset of the item.
* @push_undo: If %TRUE, create an entry in the image's undo stack
* for this action.
*
* Adds the specified increments to the X and Y offsets for the item.
*/
void
pika_item_translate (PikaItem *item,
gdouble offset_x,
gdouble offset_y,
gboolean push_undo)
{
PikaItemClass *item_class;
PikaImage *image;
g_return_if_fail (PIKA_IS_ITEM (item));
item_class = PIKA_ITEM_GET_CLASS (item);
image = pika_item_get_image (item);
if (! pika_item_is_attached (item))
push_undo = FALSE;
if (push_undo)
pika_image_undo_group_start (image, PIKA_UNDO_GROUP_ITEM_DISPLACE,
item_class->translate_desc);
pika_item_start_transform (item, push_undo);
item_class->translate (item, offset_x, offset_y, push_undo);
pika_item_end_transform (item, push_undo);
if (push_undo)
pika_image_undo_group_end (image);
}
/**
* pika_item_check_scaling:
* @item: Item to check
* @new_width: proposed width of item, in pixels
* @new_height: proposed height of item, in pixels
*
* Scales item dimensions, then snaps them to pixel centers
*
* Returns: %FALSE if any dimension reduces to zero as a result
* of this; otherwise, returns %TRUE.
**/
gboolean
pika_item_check_scaling (PikaItem *item,
gint new_width,
gint new_height)
{
PikaItemPrivate *private;
PikaImage *image;
gdouble img_scale_w;
gdouble img_scale_h;
gint new_item_offset_x;
gint new_item_offset_y;
gint new_item_width;
gint new_item_height;
g_return_val_if_fail (PIKA_IS_ITEM (item), FALSE);
private = GET_PRIVATE (item);
image = pika_item_get_image (item);
img_scale_w = ((gdouble) new_width /
(gdouble) pika_image_get_width (image));
img_scale_h = ((gdouble) new_height /
(gdouble) pika_image_get_height (image));
new_item_offset_x = SIGNED_ROUND (img_scale_w * private->offset_x);
new_item_offset_y = SIGNED_ROUND (img_scale_h * private->offset_y);
new_item_width = SIGNED_ROUND (img_scale_w * (private->offset_x +
pika_item_get_width (item))) -
new_item_offset_x;
new_item_height = SIGNED_ROUND (img_scale_h * (private->offset_y +
pika_item_get_height (item))) -
new_item_offset_y;
return (new_item_width > 0 && new_item_height > 0);
}
void
pika_item_scale (PikaItem *item,
gint new_width,
gint new_height,
gint new_offset_x,
gint new_offset_y,
PikaInterpolationType interpolation,
PikaProgress *progress)
{
PikaItemClass *item_class;
PikaImage *image;
gboolean push_undo;
g_return_if_fail (PIKA_IS_ITEM (item));
g_return_if_fail (progress == NULL || PIKA_IS_PROGRESS (progress));
if (new_width < 1 || new_height < 1)
return;
item_class = PIKA_ITEM_GET_CLASS (item);
image = pika_item_get_image (item);
push_undo = pika_item_is_attached (item);
if (push_undo)
pika_image_undo_group_start (image, PIKA_UNDO_GROUP_ITEM_SCALE,
item_class->scale_desc);
pika_item_start_transform (item, push_undo);
g_object_freeze_notify (G_OBJECT (item));
item_class->scale (item, new_width, new_height, new_offset_x, new_offset_y,
interpolation, progress);
g_object_thaw_notify (G_OBJECT (item));
pika_item_end_transform (item, push_undo);
if (push_undo)
pika_image_undo_group_end (image);
}
/**
* pika_item_scale_by_factors:
* @item: Item to be transformed by explicit width and height factors.
* @w_factor: scale factor to apply to width and horizontal offset
* @h_factor: scale factor to apply to height and vertical offset
* @interpolation:
* @progress:
*
* Scales item dimensions and offsets by uniform width and
* height factors.
*
* Use pika_item_scale_by_factors() in circumstances when the same
* width and height scaling factors are to be uniformly applied to a
* set of items. In this context, the item's dimensions and offsets
* from the sides of the containing image all change by these
* predetermined factors. By fiat, the fixed point of the transform is
* the upper left hand corner of the image. Returns %FALSE if a
* requested scale factor is zero or if a scaling zero's out a item
* dimension; returns %TRUE otherwise.
*
* Use pika_item_scale() in circumstances where new item width
* and height dimensions are predetermined instead.
*
* Side effects: Undo set created for item. Old item imagery
* scaled & painted to new item tiles.
*
* Returns: %TRUE, if the scaled item has positive dimensions
* %FALSE if the scaled item has at least one zero dimension
**/
gboolean
pika_item_scale_by_factors (PikaItem *item,
gdouble w_factor,
gdouble h_factor,
PikaInterpolationType interpolation,
PikaProgress *progress)
{
return pika_item_scale_by_factors_with_origin (item,
w_factor, h_factor,
0, 0, 0, 0,
interpolation, progress);
}
/**
* pika_item_scale_by_factors:
* @item: Item to be transformed by explicit width and height factors.
* @w_factor: scale factor to apply to width and horizontal offset
* @h_factor: scale factor to apply to height and vertical offset
* @origin_x: x-coordinate of the transformation input origin
* @origin_y: y-coordinate of the transformation input origin
* @new_origin_x: x-coordinate of the transformation output origin
* @new_origin_y: y-coordinate of the transformation output origin
* @interpolation:
* @progress:
*
* Same as pika_item_scale_by_factors(), but with the option to specify
* custom input and output points of origin for the transformation.
*
* Returns: %TRUE, if the scaled item has positive dimensions
* %FALSE if the scaled item has at least one zero dimension
**/
gboolean
pika_item_scale_by_factors_with_origin (PikaItem *item,
gdouble w_factor,
gdouble h_factor,
gint origin_x,
gint origin_y,
gint new_origin_x,
gint new_origin_y,
PikaInterpolationType interpolation,
PikaProgress *progress)
{
PikaItemPrivate *private;
PikaContainer *children;
gint new_width, new_height;
gint new_offset_x, new_offset_y;
g_return_val_if_fail (PIKA_IS_ITEM (item), FALSE);
g_return_val_if_fail (progress == NULL || PIKA_IS_PROGRESS (progress), FALSE);
private = GET_PRIVATE (item);
if (w_factor <= 0.0 || h_factor <= 0.0)
{
g_warning ("%s: requested width or height scale is non-positive",
G_STRFUNC);
return FALSE;
}
children = pika_viewable_get_children (PIKA_VIEWABLE (item));
/* avoid discarding empty layer groups */
if (children && pika_container_is_empty (children))
return TRUE;
new_offset_x = SIGNED_ROUND (w_factor * (private->offset_x - origin_x));
new_offset_y = SIGNED_ROUND (h_factor * (private->offset_y - origin_y));
new_width = SIGNED_ROUND (w_factor * (private->offset_x - origin_x +
pika_item_get_width (item))) -
new_offset_x;
new_height = SIGNED_ROUND (h_factor * (private->offset_y - origin_y +
pika_item_get_height (item))) -
new_offset_y;
new_offset_x += new_origin_x;
new_offset_y += new_origin_y;
if (new_width > 0 && new_height > 0)
{
pika_item_scale (item,
new_width, new_height,
new_offset_x, new_offset_y,
interpolation, progress);
return TRUE;
}
return FALSE;
}
/**
* pika_item_scale_by_origin:
* @item: The item to be transformed by width & height scale factors
* @new_width: The width that item will acquire
* @new_height: The height that the item will acquire
* @interpolation:
* @progress:
* @local_origin: sets fixed point of the scaling transform. See below.
*
* Sets item dimensions to new_width and
* new_height. Derives vertical and horizontal scaling
* transforms from new width and height. If local_origin is
* %TRUE, the fixed point of the scaling transform coincides
* with the item's center point. Otherwise, the fixed
* point is taken to be [-PikaItem::offset_x, -PikaItem::->offset_y].
*
* Since this function derives scale factors from new and
* current item dimensions, these factors will vary from
* item to item because of aliasing artifacts; factor
* variations among items can be quite large where item
* dimensions approach pixel dimensions. Use
* pika_item_scale_by_factors() where constant scales are to
* be uniformly applied to a number of items.
*
* Side effects: undo set created for item.
* Old item imagery scaled
* & painted to new item tiles
**/
void
pika_item_scale_by_origin (PikaItem *item,
gint new_width,
gint new_height,
PikaInterpolationType interpolation,
PikaProgress *progress,
gboolean local_origin)
{
PikaItemPrivate *private;
gint new_offset_x, new_offset_y;
g_return_if_fail (PIKA_IS_ITEM (item));
g_return_if_fail (progress == NULL || PIKA_IS_PROGRESS (progress));
private = GET_PRIVATE (item);
if (new_width == 0 || new_height == 0)
{
g_warning ("%s: requested width or height equals zero", G_STRFUNC);
return;
}
if (local_origin)
{
new_offset_x = (private->offset_x +
((pika_item_get_width (item) - new_width) / 2.0));
new_offset_y = (private->offset_y +
((pika_item_get_height (item) - new_height) / 2.0));
}
else
{
new_offset_x = (gint) (((gdouble) new_width *
(gdouble) private->offset_x /
(gdouble) pika_item_get_width (item)));
new_offset_y = (gint) (((gdouble) new_height *
(gdouble) private->offset_y /
(gdouble) pika_item_get_height (item)));
}
pika_item_scale (item,
new_width, new_height,
new_offset_x, new_offset_y,
interpolation, progress);
}
void
pika_item_resize (PikaItem *item,
PikaContext *context,
PikaFillType fill_type,
gint new_width,
gint new_height,
gint offset_x,
gint offset_y)
{
PikaItemClass *item_class;
PikaImage *image;
gboolean push_undo;
g_return_if_fail (PIKA_IS_ITEM (item));
g_return_if_fail (PIKA_IS_CONTEXT (context));
if (new_width < 1 || new_height < 1)
return;
item_class = PIKA_ITEM_GET_CLASS (item);
image = pika_item_get_image (item);
push_undo = pika_item_is_attached (item);
if (push_undo)
pika_image_undo_group_start (image, PIKA_UNDO_GROUP_ITEM_RESIZE,
item_class->resize_desc);
/* note that we call pika_item_start_move(), and not
* pika_item_start_transform(). whether or not a resize operation should be
* considered a transform operation, or a move operation, depends on the
* intended use of these functions by subclasses. atm, we only use
* pika_item_{start,end}_transform() to suspend mask resizing in group
* layers, which should not happen when reisizing a group, hence the call to
* pika_item_start_move().
*
* see the comment in pika_group_layer_resize() for more information.
*/
pika_item_start_move (item, push_undo);
g_object_freeze_notify (G_OBJECT (item));
item_class->resize (item, context, fill_type,
new_width, new_height, offset_x, offset_y);
g_object_thaw_notify (G_OBJECT (item));
pika_item_end_move (item, push_undo);
if (push_undo)
pika_image_undo_group_end (image);
}
void
pika_item_flip (PikaItem *item,
PikaContext *context,
PikaOrientationType flip_type,
gdouble axis,
gboolean clip_result)
{
PikaItemClass *item_class;
PikaImage *image;
gboolean push_undo;
g_return_if_fail (PIKA_IS_ITEM (item));
g_return_if_fail (pika_item_is_attached (item));
g_return_if_fail (PIKA_IS_CONTEXT (context));
item_class = PIKA_ITEM_GET_CLASS (item);
image = pika_item_get_image (item);
push_undo = pika_item_is_attached (item);
if (push_undo)
pika_image_undo_group_start (image, PIKA_UNDO_GROUP_TRANSFORM,
item_class->flip_desc);
pika_item_start_transform (item, push_undo);
g_object_freeze_notify (G_OBJECT (item));
item_class->flip (item, context, flip_type, axis, clip_result);
g_object_thaw_notify (G_OBJECT (item));
pika_item_end_transform (item, push_undo);
if (push_undo)
pika_image_undo_group_end (image);
}
void
pika_item_rotate (PikaItem *item,
PikaContext *context,
PikaRotationType rotate_type,
gdouble center_x,
gdouble center_y,
gboolean clip_result)
{
PikaItemClass *item_class;
PikaImage *image;
gboolean push_undo;
g_return_if_fail (PIKA_IS_ITEM (item));
g_return_if_fail (pika_item_is_attached (item));
g_return_if_fail (PIKA_IS_CONTEXT (context));
item_class = PIKA_ITEM_GET_CLASS (item);
image = pika_item_get_image (item);
push_undo = pika_item_is_attached (item);
if (push_undo)
pika_image_undo_group_start (image, PIKA_UNDO_GROUP_TRANSFORM,
item_class->rotate_desc);
pika_item_start_transform (item, push_undo);
g_object_freeze_notify (G_OBJECT (item));
item_class->rotate (item, context, rotate_type, center_x, center_y,
clip_result);
g_object_thaw_notify (G_OBJECT (item));
pika_item_end_transform (item, push_undo);
if (push_undo)
pika_image_undo_group_end (image);
}
void
pika_item_transform (PikaItem *item,
PikaContext *context,
const PikaMatrix3 *matrix,
PikaTransformDirection direction,
PikaInterpolationType interpolation,
PikaTransformResize clip_result,
PikaProgress *progress)
{
PikaItemClass *item_class;
PikaImage *image;
gboolean push_undo;
g_return_if_fail (PIKA_IS_ITEM (item));
g_return_if_fail (pika_item_is_attached (item));
g_return_if_fail (PIKA_IS_CONTEXT (context));
g_return_if_fail (matrix != NULL);
g_return_if_fail (progress == NULL || PIKA_IS_PROGRESS (progress));
item_class = PIKA_ITEM_GET_CLASS (item);
image = pika_item_get_image (item);
push_undo = pika_item_is_attached (item);
if (push_undo)
pika_image_undo_group_start (image, PIKA_UNDO_GROUP_TRANSFORM,
item_class->transform_desc);
pika_item_start_transform (item, push_undo);
g_object_freeze_notify (G_OBJECT (item));
item_class->transform (item, context, matrix, direction, interpolation,
clip_result, progress);
g_object_thaw_notify (G_OBJECT (item));
pika_item_end_transform (item, push_undo);
if (push_undo)
pika_image_undo_group_end (image);
}
PikaTransformResize
pika_item_get_clip (PikaItem *item,
PikaTransformResize clip_result)
{
g_return_val_if_fail (PIKA_IS_ITEM (item), PIKA_TRANSFORM_RESIZE_ADJUST);
return PIKA_ITEM_GET_CLASS (item)->get_clip (item, clip_result);
}
gboolean
pika_item_fill (PikaItem *item,
GList *drawables,
PikaFillOptions *fill_options,
gboolean push_undo,
PikaProgress *progress,
GError **error)
{
PikaItemClass *item_class;
GList *iter;
gboolean retval = FALSE;
g_return_val_if_fail (PIKA_IS_ITEM (item), FALSE);
g_return_val_if_fail (pika_item_is_attached (item), FALSE);
g_return_val_if_fail (PIKA_IS_FILL_OPTIONS (fill_options), FALSE);
g_return_val_if_fail (progress == NULL || PIKA_IS_PROGRESS (progress), FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
item_class = PIKA_ITEM_GET_CLASS (item);
for (iter = drawables; iter; iter = iter->next)
{
g_return_val_if_fail (PIKA_IS_DRAWABLE (iter->data), FALSE);
g_return_val_if_fail (pika_item_is_attached (PIKA_ITEM (iter->data)), FALSE);
}
if (item_class->fill)
{
PikaImage *image = pika_item_get_image (item);
if (push_undo)
pika_image_undo_group_start (image, PIKA_UNDO_GROUP_PAINT,
item_class->fill_desc);
for (iter = drawables; iter; iter = iter->next)
{
retval = item_class->fill (item, iter->data, fill_options,
push_undo, progress, error);
if (! retval)
break;
}
if (push_undo)
pika_image_undo_group_end (image);
}
return retval;
}
gboolean
pika_item_stroke (PikaItem *item,
GList *drawables,
PikaContext *context,
PikaStrokeOptions *stroke_options,
PikaPaintOptions *paint_options,
gboolean push_undo,
PikaProgress *progress,
GError **error)
{
PikaItemClass *item_class;
GList *iter;
gboolean retval = FALSE;
g_return_val_if_fail (PIKA_IS_ITEM (item), FALSE);
g_return_val_if_fail (pika_item_is_attached (item), FALSE);
g_return_val_if_fail (PIKA_IS_CONTEXT (context), FALSE);
g_return_val_if_fail (PIKA_IS_STROKE_OPTIONS (stroke_options), FALSE);
g_return_val_if_fail (paint_options == NULL ||
PIKA_IS_PAINT_OPTIONS (paint_options), FALSE);
g_return_val_if_fail (progress == NULL || PIKA_IS_PROGRESS (progress), FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
item_class = PIKA_ITEM_GET_CLASS (item);
for (iter = drawables; iter; iter = iter->next)
{
g_return_val_if_fail (PIKA_IS_DRAWABLE (iter->data), FALSE);
g_return_val_if_fail (pika_item_is_attached (PIKA_ITEM (iter->data)), FALSE);
}
if (item_class->stroke)
{
PikaImage *image = pika_item_get_image (item);
pika_stroke_options_prepare (stroke_options, context, paint_options);
if (push_undo)
pika_image_undo_group_start (image, PIKA_UNDO_GROUP_PAINT,
item_class->stroke_desc);
for (iter = drawables; iter; iter = iter->next)
{
retval = item_class->stroke (item, iter->data, stroke_options, push_undo,
progress, error);
if (! retval)
break;
}
if (push_undo)
pika_image_undo_group_end (image);
pika_stroke_options_finish (stroke_options);
}
return retval;
}
void
pika_item_to_selection (PikaItem *item,
PikaChannelOps op,
gboolean antialias,
gboolean feather,
gdouble feather_radius_x,
gdouble feather_radius_y)
{
PikaItemClass *item_class;
g_return_if_fail (PIKA_IS_ITEM (item));
g_return_if_fail (pika_item_is_attached (item));
item_class = PIKA_ITEM_GET_CLASS (item);
if (item_class->to_selection)
item_class->to_selection (item, op, antialias,
feather, feather_radius_x, feather_radius_y);
}
void
pika_item_add_offset_node (PikaItem *item,
GeglNode *node)
{
PikaItemPrivate *private;
g_return_if_fail (PIKA_IS_ITEM (item));
g_return_if_fail (GEGL_IS_NODE (node));
private = GET_PRIVATE (item);
g_return_if_fail (g_list_find (private->offset_nodes, node) == NULL);
gegl_node_set (node,
"x", (gdouble) private->offset_x,
"y", (gdouble) private->offset_y,
NULL);
private->offset_nodes = g_list_append (private->offset_nodes,
g_object_ref (node));
}
void
pika_item_remove_offset_node (PikaItem *item,
GeglNode *node)
{
PikaItemPrivate *private;
g_return_if_fail (PIKA_IS_ITEM (item));
g_return_if_fail (GEGL_IS_NODE (node));
private = GET_PRIVATE (item);
g_return_if_fail (g_list_find (private->offset_nodes, node) != NULL);
private->offset_nodes = g_list_remove (private->offset_nodes, node);
g_object_unref (node);
}
gint
pika_item_get_id (PikaItem *item)
{
g_return_val_if_fail (PIKA_IS_ITEM (item), -1);
return GET_PRIVATE (item)->ID;
}
PikaItem *
pika_item_get_by_id (Pika *pika,
gint item_id)
{
g_return_val_if_fail (PIKA_IS_PIKA (pika), NULL);
if (pika->item_table == NULL)
return NULL;
return (PikaItem *) pika_id_table_lookup (pika->item_table, item_id);
}
PikaTattoo
pika_item_get_tattoo (PikaItem *item)
{
g_return_val_if_fail (PIKA_IS_ITEM (item), 0);
return GET_PRIVATE (item)->tattoo;
}
void
pika_item_set_tattoo (PikaItem *item,
PikaTattoo tattoo)
{
g_return_if_fail (PIKA_IS_ITEM (item));
GET_PRIVATE (item)->tattoo = tattoo;
}
PikaImage *
pika_item_get_image (PikaItem *item)
{
g_return_val_if_fail (PIKA_IS_ITEM (item), NULL);
return GET_PRIVATE (item)->image;
}
void
pika_item_set_image (PikaItem *item,
PikaImage *image)
{
PikaItemPrivate *private;
g_return_if_fail (PIKA_IS_ITEM (item));
g_return_if_fail (! pika_item_is_attached (item));
g_return_if_fail (! pika_item_is_removed (item));
g_return_if_fail (PIKA_IS_IMAGE (image));
private = GET_PRIVATE (item);
if (image == private->image)
return;
g_object_freeze_notify (G_OBJECT (item));
if (private->ID == 0)
{
private->ID = pika_id_table_insert (image->pika->item_table, item);
g_object_notify_by_pspec (G_OBJECT (item), pika_item_props[PROP_ID]);
}
if (private->tattoo == 0 || private->image != image)
{
private->tattoo = pika_image_get_new_tattoo (image);
}
private->image = image;
g_object_notify_by_pspec (G_OBJECT (item), pika_item_props[PROP_IMAGE]);
g_object_thaw_notify (G_OBJECT (item));
}
/**
* pika_item_replace_item:
* @item: a newly allocated #PikaItem
* @replace: the #PikaItem to be replaced by @item
*
* This function shouly only be called right after @item has been
* newly allocated.
*
* Replaces @replace by @item, as far as possible within the #PikaItem
* class. The new @item takes over @replace's ID, tattoo, offset, size
* etc. and all these properties are set to %NULL on @replace.
*
* This function *only* exists to allow subclasses to do evil hacks
* like in XCF text layer loading. Don't ever use this function if you
* are not sure.
*
* After this function returns, @replace has become completely
* unusable, should only be used to steal everything it has (like its
* drawable properties if it's a drawable), and then be destroyed.
**/
void
pika_item_replace_item (PikaItem *item,
PikaItem *replace)
{
PikaItemPrivate *private;
gint offset_x;
gint offset_y;
g_return_if_fail (PIKA_IS_ITEM (item));
g_return_if_fail (! pika_item_is_attached (item));
g_return_if_fail (! pika_item_is_removed (item));
g_return_if_fail (PIKA_IS_ITEM (replace));
private = GET_PRIVATE (item);
pika_object_set_name (PIKA_OBJECT (item), pika_object_get_name (replace));
if (private->ID)
pika_id_table_remove (pika_item_get_image (item)->pika->item_table,
pika_item_get_id (item));
private->ID = pika_item_get_id (replace);
pika_id_table_replace (pika_item_get_image (item)->pika->item_table,
pika_item_get_id (item),
item);
/* Set image before tattoo so that the explicitly set tattoo overrides
* the one implicitly set when setting the image
*/
pika_item_set_image (item, pika_item_get_image (replace));
GET_PRIVATE (replace)->image = NULL;
pika_item_set_tattoo (item, pika_item_get_tattoo (replace));
pika_item_set_tattoo (replace, 0);
g_object_unref (private->parasites);
private->parasites = GET_PRIVATE (replace)->parasites;
GET_PRIVATE (replace)->parasites = NULL;
pika_item_get_offset (replace, &offset_x, &offset_y);
pika_item_set_offset (item, offset_x, offset_y);
pika_item_set_size (item,
pika_item_get_width (replace),
pika_item_get_height (replace));
pika_item_set_visible (item, pika_item_get_visible (replace), FALSE);
pika_item_set_color_tag (item, pika_item_get_color_tag (replace), FALSE);
pika_item_set_lock_content (item, pika_item_get_lock_content (replace), FALSE);
pika_item_set_lock_position (item, pika_item_get_lock_position (replace), FALSE);
pika_item_set_lock_visibility (item, pika_item_get_lock_visibility (replace), FALSE);
}
/**
* pika_item_set_parasites:
* @item: a #PikaItem
* @parasites: a #PikaParasiteList
*
* Set an @item's #PikaParasiteList. It's usually never needed to
* fiddle with an item's parasite list directly. This function exists
* for special purposes only, like when creating items from unusual
* sources.
**/
void
pika_item_set_parasites (PikaItem *item,
PikaParasiteList *parasites)
{
PikaItemPrivate *private;
g_return_if_fail (PIKA_IS_ITEM (item));
g_return_if_fail (PIKA_IS_PARASITE_LIST (parasites));
private = GET_PRIVATE (item);
g_set_object (&private->parasites, parasites);
}
/**
* pika_item_get_parasites:
* @item: a #PikaItem
*
* Get an @item's #PikaParasiteList. It's usually never needed to
* fiddle with an item's parasite list directly. This function exists
* for special purposes only, like when saving an item to XCF.
*
* Returns: The @item's #PikaParasiteList.
**/
PikaParasiteList *
pika_item_get_parasites (PikaItem *item)
{
g_return_val_if_fail (PIKA_IS_ITEM (item), NULL);
return GET_PRIVATE (item)->parasites;
}
gboolean
pika_item_parasite_validate (PikaItem *item,
const PikaParasite *parasite,
GError **error)
{
g_return_val_if_fail (PIKA_IS_ITEM (item), FALSE);
g_return_val_if_fail (parasite != NULL, FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
return TRUE;
}
void
pika_item_parasite_attach (PikaItem *item,
const PikaParasite *parasite,
gboolean push_undo)
{
PikaItemPrivate *private;
PikaParasite copy;
g_return_if_fail (PIKA_IS_ITEM (item));
g_return_if_fail (parasite != NULL);
private = GET_PRIVATE (item);
/* make a temporary copy of the PikaParasite struct because
* pika_parasite_shift_parent() changes it
*/
copy = *parasite;
if (! pika_item_is_attached (item))
push_undo = FALSE;
if (push_undo)
{
/* only set the dirty bit manually if we can be saved and the new
* parasite differs from the current one and we aren't undoable
*/
if (pika_parasite_is_undoable (&copy))
{
/* do a group in case we have attach_parent set */
pika_image_undo_group_start (private->image,
PIKA_UNDO_GROUP_PARASITE_ATTACH,
C_("undo-type", "Attach Parasite"));
pika_image_undo_push_item_parasite (private->image, NULL, item, &copy);
}
else if (pika_parasite_is_persistent (&copy) &&
! pika_parasite_compare (&copy,
pika_item_parasite_find
(item, pika_parasite_get_name (&copy))))
{
pika_image_undo_push_cantundo (private->image,
C_("undo-type", "Attach Parasite to Item"));
}
}
pika_parasite_list_add (private->parasites, &copy);
if (pika_parasite_has_flag (&copy, PIKA_PARASITE_ATTACH_PARENT))
{
pika_parasite_shift_parent (&copy);
pika_image_parasite_attach (private->image, &copy, TRUE);
}
else if (pika_parasite_has_flag (&copy, PIKA_PARASITE_ATTACH_GRANDPARENT))
{
pika_parasite_shift_parent (&copy);
pika_parasite_shift_parent (&copy);
pika_parasite_attach (private->image->pika, &copy);
}
if (pika_item_is_attached (item) &&
pika_parasite_is_undoable (&copy))
{
pika_image_undo_group_end (private->image);
}
}
void
pika_item_parasite_detach (PikaItem *item,
const gchar *name,
gboolean push_undo)
{
PikaItemPrivate *private;
const PikaParasite *parasite;
g_return_if_fail (PIKA_IS_ITEM (item));
g_return_if_fail (name != NULL);
private = GET_PRIVATE (item);
parasite = pika_parasite_list_find (private->parasites, name);
if (! parasite)
return;
if (! pika_item_is_attached (item))
push_undo = FALSE;
if (push_undo)
{
if (pika_parasite_is_undoable (parasite))
{
pika_image_undo_push_item_parasite_remove (private->image,
C_("undo-type", "Remove Parasite from Item"),
item,
pika_parasite_get_name (parasite));
}
else if (pika_parasite_is_persistent (parasite))
{
pika_image_undo_push_cantundo (private->image,
C_("undo-type", "Remove Parasite from Item"));
}
}
pika_parasite_list_remove (private->parasites, name);
}
const PikaParasite *
pika_item_parasite_find (PikaItem *item,
const gchar *name)
{
g_return_val_if_fail (PIKA_IS_ITEM (item), NULL);
return pika_parasite_list_find (GET_PRIVATE (item)->parasites, name);
}
static void
pika_item_parasite_list_foreach_func (gchar *name,
PikaParasite *parasite,
gchar ***cur)
{
*(*cur)++ = (gchar *) g_strdup (name);
}
gchar **
pika_item_parasite_list (PikaItem *item)
{
PikaItemPrivate *private;
gint count;
gchar **list;
gchar **cur;
g_return_val_if_fail (PIKA_IS_ITEM (item), NULL);
private = GET_PRIVATE (item);
count = pika_parasite_list_length (private->parasites);
cur = list = g_new0 (gchar *, count + 1);
pika_parasite_list_foreach (private->parasites,
(GHFunc) pika_item_parasite_list_foreach_func,
&cur);
return list;
}
gboolean
pika_item_set_visible (PikaItem *item,
gboolean visible,
gboolean push_undo)
{
g_return_val_if_fail (PIKA_IS_ITEM (item), FALSE);
visible = visible ? TRUE : FALSE;
if (pika_item_get_visible (item) != visible)
{
if (pika_item_is_visibility_locked (item, NULL))
{
return FALSE;
}
if (push_undo && pika_item_is_attached (item))
{
PikaImage *image = pika_item_get_image (item);
if (image)
pika_image_undo_push_item_visibility (image, NULL, item);
}
GET_PRIVATE (item)->visible = visible;
if (GET_PRIVATE (item)->bind_visible_to_active)
pika_filter_set_active (PIKA_FILTER (item), visible);
g_signal_emit (item, pika_item_signals[VISIBILITY_CHANGED], 0);
g_object_notify_by_pspec (G_OBJECT (item), pika_item_props[PROP_VISIBLE]);
}
return TRUE;
}
gboolean
pika_item_get_visible (PikaItem *item)
{
g_return_val_if_fail (PIKA_IS_ITEM (item), FALSE);
return GET_PRIVATE (item)->visible;
}
gboolean
pika_item_is_visible (PikaItem *item)
{
g_return_val_if_fail (PIKA_IS_ITEM (item), FALSE);
if (pika_item_get_visible (item))
{
PikaItem *parent;
parent = PIKA_ITEM (pika_viewable_get_parent (PIKA_VIEWABLE (item)));
if (parent)
return pika_item_is_visible (parent);
return TRUE;
}
return FALSE;
}
void
pika_item_bind_visible_to_active (PikaItem *item,
gboolean bind)
{
g_return_if_fail (PIKA_IS_ITEM (item));
GET_PRIVATE (item)->bind_visible_to_active = bind;
if (bind)
pika_filter_set_active (PIKA_FILTER (item), pika_item_get_visible (item));
}
void
pika_item_set_color_tag (PikaItem *item,
PikaColorTag color_tag,
gboolean push_undo)
{
g_return_if_fail (PIKA_IS_ITEM (item));
if (pika_item_get_color_tag (item) != color_tag)
{
if (push_undo && pika_item_is_attached (item))
{
PikaImage *image = pika_item_get_image (item);
if (image)
pika_image_undo_push_item_color_tag (image, NULL, item);
}
GET_PRIVATE (item)->color_tag = color_tag;
g_signal_emit (item, pika_item_signals[COLOR_TAG_CHANGED], 0);
g_object_notify_by_pspec (G_OBJECT (item),
pika_item_props[PROP_COLOR_TAG]);
}
}
PikaColorTag
pika_item_get_color_tag (PikaItem *item)
{
g_return_val_if_fail (PIKA_IS_ITEM (item), PIKA_COLOR_TAG_NONE);
return GET_PRIVATE (item)->color_tag;
}
PikaColorTag
pika_item_get_merged_color_tag (PikaItem *item)
{
g_return_val_if_fail (PIKA_IS_ITEM (item), PIKA_COLOR_TAG_NONE);
if (pika_item_get_color_tag (item) == PIKA_COLOR_TAG_NONE)
{
PikaItem *parent;
parent = PIKA_ITEM (pika_viewable_get_parent (PIKA_VIEWABLE (item)));
if (parent)
return pika_item_get_merged_color_tag (parent);
}
return pika_item_get_color_tag (item);
}
void
pika_item_set_lock_content (PikaItem *item,
gboolean lock_content,
gboolean push_undo)
{
g_return_if_fail (PIKA_IS_ITEM (item));
g_return_if_fail (pika_item_can_lock_content (item));
lock_content = lock_content ? TRUE : FALSE;
if (pika_item_get_lock_content (item) != lock_content)
{
if (push_undo && pika_item_is_attached (item))
{
/* Right now I don't think this should be pushed. */
#if 0
PikaImage *image = pika_item_get_image (item);
pika_image_undo_push_item_lock_content (image, NULL, item);
#endif
}
GET_PRIVATE (item)->lock_content = lock_content;
g_signal_emit (item, pika_item_signals[LOCK_CONTENT_CHANGED], 0);
g_object_notify_by_pspec (G_OBJECT (item),
pika_item_props[PROP_LOCK_CONTENT]);
}
}
gboolean
pika_item_get_lock_content (PikaItem *item)
{
g_return_val_if_fail (PIKA_IS_ITEM (item), FALSE);
return GET_PRIVATE (item)->lock_content;
}
gboolean
pika_item_can_lock_content (PikaItem *item)
{
g_return_val_if_fail (PIKA_IS_ITEM (item), FALSE);
return TRUE;
}
gboolean
pika_item_is_content_locked (PikaItem *item,
PikaItem **locked_item)
{
g_return_val_if_fail (PIKA_IS_ITEM (item), FALSE);
return PIKA_ITEM_GET_CLASS (item)->is_content_locked (item, locked_item);
}
void
pika_item_set_lock_position (PikaItem *item,
gboolean lock_position,
gboolean push_undo)
{
g_return_if_fail (PIKA_IS_ITEM (item));
g_return_if_fail (pika_item_can_lock_position (item));
lock_position = lock_position ? TRUE : FALSE;
if (pika_item_get_lock_position (item) != lock_position)
{
if (push_undo && pika_item_is_attached (item))
{
PikaImage *image = pika_item_get_image (item);
pika_image_undo_push_item_lock_position (image, NULL, item);
}
GET_PRIVATE (item)->lock_position = lock_position;
g_signal_emit (item, pika_item_signals[LOCK_POSITION_CHANGED], 0);
g_object_notify_by_pspec (G_OBJECT (item),
pika_item_props[PROP_LOCK_POSITION]);
}
}
gboolean
pika_item_get_lock_position (PikaItem *item)
{
g_return_val_if_fail (PIKA_IS_ITEM (item), FALSE);
return GET_PRIVATE (item)->lock_position;
}
gboolean
pika_item_can_lock_position (PikaItem *item)
{
g_return_val_if_fail (PIKA_IS_ITEM (item), FALSE);
return TRUE;
}
gboolean
pika_item_is_position_locked (PikaItem *item,
PikaItem **locked_item)
{
g_return_val_if_fail (PIKA_IS_ITEM (item), FALSE);
return PIKA_ITEM_GET_CLASS (item)->is_position_locked (item, locked_item, TRUE);
}
void
pika_item_set_lock_visibility (PikaItem *item,
gboolean lock_visibility,
gboolean push_undo)
{
g_return_if_fail (PIKA_IS_ITEM (item));
g_return_if_fail (pika_item_can_lock_visibility (item));
lock_visibility = lock_visibility ? TRUE : FALSE;
if (pika_item_get_lock_visibility (item) != lock_visibility)
{
if (push_undo && pika_item_is_attached (item))
{
PikaImage *image = pika_item_get_image (item);
pika_image_undo_push_item_lock_visibility (image, NULL, item);
}
GET_PRIVATE (item)->lock_visibility = lock_visibility;
g_signal_emit (item, pika_item_signals[LOCK_VISIBILITY_CHANGED], 0);
g_object_notify (G_OBJECT (item), "lock-visibility");
}
}
gboolean
pika_item_get_lock_visibility (PikaItem *item)
{
g_return_val_if_fail (PIKA_IS_ITEM (item), FALSE);
return GET_PRIVATE (item)->lock_visibility;
}
gboolean
pika_item_can_lock_visibility (PikaItem *item)
{
g_return_val_if_fail (PIKA_IS_ITEM (item), FALSE);
return TRUE;
}
gboolean
pika_item_is_visibility_locked (PikaItem *item,
PikaItem **locked_item)
{
g_return_val_if_fail (PIKA_IS_ITEM (item), FALSE);
return PIKA_ITEM_GET_CLASS (item)->is_visibility_locked (item, locked_item);
}
gboolean
pika_item_mask_bounds (PikaItem *item,
gint *x1,
gint *y1,
gint *x2,
gint *y2)
{
PikaImage *image;
PikaChannel *selection;
gint x, y, width, height;
gboolean retval;
g_return_val_if_fail (PIKA_IS_ITEM (item), FALSE);
g_return_val_if_fail (pika_item_is_attached (item), FALSE);
image = pika_item_get_image (item);
selection = pika_image_get_mask (image);
/* check for is_empty() before intersecting so we ignore the
* selection if it is suspended (like when stroking)
*/
if (PIKA_ITEM (selection) != item &&
! pika_channel_is_empty (selection) &&
pika_item_bounds (PIKA_ITEM (selection), &x, &y, &width, &height))
{
gint off_x, off_y;
gint x2, y2;
pika_item_get_offset (item, &off_x, &off_y);
x2 = x + width;
y2 = y + height;
x = CLAMP (x - off_x, 0, pika_item_get_width (item));
y = CLAMP (y - off_y, 0, pika_item_get_height (item));
x2 = CLAMP (x2 - off_x, 0, pika_item_get_width (item));
y2 = CLAMP (y2 - off_y, 0, pika_item_get_height (item));
width = x2 - x;
height = y2 - y;
retval = TRUE;
}
else
{
x = 0;
y = 0;
width = pika_item_get_width (item);
height = pika_item_get_height (item);
retval = FALSE;
}
if (x1) *x1 = x;
if (y1) *y1 = y;
if (x2) *x2 = x + width;
if (y2) *y2 = y + height;
return retval;
}
/**
* pika_item_mask_intersect:
* @item: a #PikaItem
* @x: (out) (optional): return location for x
* @y: (out) (optional): return location for y
* @width: (out) (optional): return location for the width
* @height: (out) (optional): return location for the height
*
* Intersect the area of the @item and its image's selection mask.
* The computed area is the bounding box of the selection within the
* item.
*/
gboolean
pika_item_mask_intersect (PikaItem *item,
gint *x,
gint *y,
gint *width,
gint *height)
{
PikaImage *image;
PikaChannel *selection;
gint tmp_x, tmp_y;
gint tmp_width, tmp_height;
gboolean retval;
g_return_val_if_fail (PIKA_IS_ITEM (item), FALSE);
g_return_val_if_fail (pika_item_is_attached (item), FALSE);
image = pika_item_get_image (item);
selection = pika_image_get_mask (image);
/* check for is_empty() before intersecting so we ignore the
* selection if it is suspended (like when stroking)
*/
if (PIKA_ITEM (selection) != item &&
! pika_channel_is_empty (selection) &&
pika_item_bounds (PIKA_ITEM (selection),
&tmp_x, &tmp_y, &tmp_width, &tmp_height))
{
gint off_x, off_y;
pika_item_get_offset (item, &off_x, &off_y);
retval = pika_rectangle_intersect (tmp_x - off_x, tmp_y - off_y,
tmp_width, tmp_height,
0, 0,
pika_item_get_width (item),
pika_item_get_height (item),
&tmp_x, &tmp_y,
&tmp_width, &tmp_height);
}
else
{
tmp_x = 0;
tmp_y = 0;
tmp_width = pika_item_get_width (item);
tmp_height = pika_item_get_height (item);
retval = TRUE;
}
if (x) *x = tmp_x;
if (y) *y = tmp_y;
if (width) *width = tmp_width;
if (height) *height = tmp_height;
return retval;
}
gboolean
pika_item_is_in_set (PikaItem *item,
PikaItemSet set)
{
PikaItemPrivate *private;
g_return_val_if_fail (PIKA_IS_ITEM (item), FALSE);
private = GET_PRIVATE (item);
switch (set)
{
case PIKA_ITEM_SET_NONE:
return FALSE;
case PIKA_ITEM_SET_ALL:
return TRUE;
case PIKA_ITEM_SET_IMAGE_SIZED:
return (pika_item_get_width (item) == pika_image_get_width (private->image) &&
pika_item_get_height (item) == pika_image_get_height (private->image));
case PIKA_ITEM_SET_VISIBLE:
return pika_item_get_visible (item);
}
return FALSE;
}