PIKApp/app/display/pikacanvaslayerboundary.c

405 lines
13 KiB
C
Raw Permalink Normal View History

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
*
* pikacanvaslayerboundary.c
* Copyright (C) 2010 Michael Natterer <mitch@gimp.org>
*
* 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 <gegl.h>
#include <gtk/gtk.h>
#include "libpikabase/pikabase.h"
#include "libpikamath/pikamath.h"
#include "display-types.h"
#include "core/pikachannel.h"
#include "core/pikalayer.h"
#include "core/pikalayer-floating-selection.h"
#include "pikacanvas-style.h"
#include "pikacanvaslayerboundary.h"
#include "pikadisplayshell.h"
enum
{
PROP_0,
PROP_LAYERS,
PROP_EDIT_MASK
};
typedef struct _PikaCanvasLayerBoundaryPrivate PikaCanvasLayerBoundaryPrivate;
struct _PikaCanvasLayerBoundaryPrivate
{
GList *layers;
gboolean edit_mask;
};
#define GET_PRIVATE(layer_boundary) \
((PikaCanvasLayerBoundaryPrivate *) pika_canvas_layer_boundary_get_instance_private ((PikaCanvasLayerBoundary *) (layer_boundary)))
/* local function prototypes */
static void pika_canvas_layer_boundary_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void pika_canvas_layer_boundary_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void pika_canvas_layer_boundary_finalize (GObject *object);
static void pika_canvas_layer_boundary_draw (PikaCanvasItem *item,
cairo_t *cr);
static cairo_region_t * pika_canvas_layer_boundary_get_extents (PikaCanvasItem *item);
static void pika_canvas_layer_boundary_stroke (PikaCanvasItem *item,
cairo_t *cr);
G_DEFINE_TYPE_WITH_PRIVATE (PikaCanvasLayerBoundary, pika_canvas_layer_boundary,
PIKA_TYPE_CANVAS_RECTANGLE)
#define parent_class pika_canvas_layer_boundary_parent_class
static void
pika_canvas_layer_boundary_class_init (PikaCanvasLayerBoundaryClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
PikaCanvasItemClass *item_class = PIKA_CANVAS_ITEM_CLASS (klass);
object_class->set_property = pika_canvas_layer_boundary_set_property;
object_class->get_property = pika_canvas_layer_boundary_get_property;
object_class->finalize = pika_canvas_layer_boundary_finalize;
item_class->draw = pika_canvas_layer_boundary_draw;
item_class->get_extents = pika_canvas_layer_boundary_get_extents;
item_class->stroke = pika_canvas_layer_boundary_stroke;
g_object_class_install_property (object_class, PROP_LAYERS,
g_param_spec_pointer ("layers", NULL, NULL,
PIKA_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_EDIT_MASK,
g_param_spec_boolean ("edit-mask", NULL, NULL,
FALSE,
PIKA_PARAM_READWRITE));
}
static void
pika_canvas_layer_boundary_init (PikaCanvasLayerBoundary *layer_boundary)
{
}
static void
pika_canvas_layer_boundary_finalize (GObject *object)
{
PikaCanvasLayerBoundaryPrivate *private = GET_PRIVATE (object);
if (private->layers)
{
GList *iter;
for (iter = private->layers; iter; iter = iter->next)
g_clear_weak_pointer (&iter->data);
g_list_free (private->layers);
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
pika_canvas_layer_boundary_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
PikaCanvasLayerBoundaryPrivate *private = GET_PRIVATE (object);
switch (property_id)
{
case PROP_LAYERS:
if (private->layers)
{
GList *iter;
for (iter = private->layers; iter; iter = iter->next)
g_clear_weak_pointer (&iter->data);
g_list_free (private->layers);
}
private->layers = g_list_copy (g_value_get_pointer (value));
if (private->layers)
{
GList *iter;
for (iter = private->layers; iter; iter = iter->next)
/* NOT g_set_weak_pointer() because the pointer is already set */
g_object_add_weak_pointer (G_OBJECT (iter->data),
(gpointer) &iter->data);
}
break;
case PROP_EDIT_MASK:
private->edit_mask = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
pika_canvas_layer_boundary_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
PikaCanvasLayerBoundaryPrivate *private = GET_PRIVATE (object);
switch (property_id)
{
case PROP_LAYERS:
g_value_set_pointer (value, private->layers);
break;
case PROP_EDIT_MASK:
g_value_set_boolean (value, private->edit_mask);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
pika_canvas_layer_boundary_draw (PikaCanvasItem *item,
cairo_t *cr)
{
PikaCanvasLayerBoundaryPrivate *private = GET_PRIVATE (item);
if (private->layers)
PIKA_CANVAS_ITEM_CLASS (parent_class)->draw (item, cr);
}
static cairo_region_t *
pika_canvas_layer_boundary_get_extents (PikaCanvasItem *item)
{
PikaCanvasLayerBoundaryPrivate *private = GET_PRIVATE (item);
if (private->layers)
return PIKA_CANVAS_ITEM_CLASS (parent_class)->get_extents (item);
return NULL;
}
static void
pika_canvas_layer_boundary_stroke (PikaCanvasItem *item,
cairo_t *cr)
{
PikaCanvasLayerBoundaryPrivate *private = GET_PRIVATE (item);
PikaDisplayShell *shell = pika_canvas_item_get_shell (item);
GList *iter;
for (iter = private->layers; iter; iter = iter->next)
{
pika_canvas_set_layer_style (pika_canvas_item_get_canvas (item), cr,
iter->data, shell->offset_x, shell->offset_y);
cairo_stroke (cr);
}
}
PikaCanvasItem *
pika_canvas_layer_boundary_new (PikaDisplayShell *shell)
{
g_return_val_if_fail (PIKA_IS_DISPLAY_SHELL (shell), NULL);
return g_object_new (PIKA_TYPE_CANVAS_LAYER_BOUNDARY,
"shell", shell,
NULL);
}
void
pika_canvas_layer_boundary_set_layers (PikaCanvasLayerBoundary *boundary,
GList *layers)
{
PikaCanvasLayerBoundaryPrivate *private;
GList *shown_layers;
GList *iter;
gboolean changed;
g_return_if_fail (PIKA_IS_CANVAS_LAYER_BOUNDARY (boundary));
private = GET_PRIVATE (boundary);
if (g_list_length (layers) == 1 && pika_layer_is_floating_sel (layers->data))
{
PikaDrawable *drawable;
drawable = pika_layer_get_floating_sel_drawable (layers->data);
if (PIKA_IS_CHANNEL (drawable))
{
/* if the owner drawable is a channel, show no outline */
shown_layers = NULL;
}
else
{
/* otherwise, set the layer to the owner drawable */
shown_layers = g_list_prepend (NULL, PIKA_LAYER (drawable));
}
}
else
{
shown_layers = g_list_copy (layers);
}
changed = (g_list_length (shown_layers) != g_list_length (private->layers));
if (! changed)
{
for (iter = shown_layers; iter; iter = iter->next)
{
if (! g_list_find (private->layers, iter->data))
{
changed = TRUE;
break;
}
}
}
if (changed)
{
gboolean edit_mask = FALSE;
gint x1 = G_MAXINT;
gint x2 = G_MININT;
gint y1 = G_MAXINT;
gint y2 = G_MININT;
for (iter = layers; iter; iter = iter->next)
{
if (iter->data)
{
PikaItem *item = PIKA_ITEM (iter->data);
x1 = MIN (x1, pika_item_get_offset_x (item));
y1 = MIN (y1, pika_item_get_offset_y (item));
x2 = MAX (x2,
pika_item_get_offset_x (item) +
pika_item_get_width (item));
y2 = MAX (y2,
pika_item_get_offset_y (item) +
pika_item_get_height (item));
/* We can only edit one layer mask at a time. */
if (pika_layer_get_mask (iter->data) &&
pika_layer_get_edit_mask (iter->data))
edit_mask = TRUE;
}
}
pika_canvas_item_begin_change (PIKA_CANVAS_ITEM (boundary));
if (layers)
g_object_set (boundary,
"x", (gdouble) x1,
"y", (gdouble) y1,
"width", (gdouble) (x2 - x1),
"height", (gdouble) (y2 - y1),
NULL);
g_object_set (boundary,
"layers", layers,
"edit-mask", edit_mask,
NULL);
pika_canvas_item_end_change (PIKA_CANVAS_ITEM (boundary));
}
else if (layers)
{
gboolean edit_mask = FALSE;
gint x1 = G_MAXINT;
gint x2 = G_MININT;
gint y1 = G_MAXINT;
gint y2 = G_MININT;
gdouble x, y, w, h;
g_object_get (boundary,
"x", &x,
"y", &y,
"width", &w,
"height", &h,
NULL);
for (iter = layers; iter; iter = iter->next)
{
if (iter->data)
{
PikaItem *item = PIKA_ITEM (iter->data);
x1 = MIN (x1, pika_item_get_offset_x (item));
y1 = MIN (y1, pika_item_get_offset_y (item));
x2 = MAX (x2,
pika_item_get_offset_x (item) +
pika_item_get_width (item));
y2 = MAX (y2,
pika_item_get_offset_y (item) +
pika_item_get_height (item));
if (pika_layer_get_mask (iter->data) &&
pika_layer_get_edit_mask (iter->data))
edit_mask = TRUE;
}
}
if (x1 != (gint) x ||
x1 != (gint) y ||
(x2 - x1) != (gint) w ||
(y2 - y1) != (gint) h ||
edit_mask != private->edit_mask)
{
pika_canvas_item_begin_change (PIKA_CANVAS_ITEM (boundary));
g_object_set (boundary,
"x", (gdouble) x1,
"y", (gdouble) y1,
"width", (gdouble) (x2 - x1),
"height", (gdouble) (y2 - y1),
"edit-mask", edit_mask,
NULL);
pika_canvas_item_end_change (PIKA_CANVAS_ITEM (boundary));
}
}
g_list_free (shown_layers);
}