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PIKApp/app/tools/pikacroptool.c

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/* 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 <gegl.h>
#include <gtk/gtk.h>
#include "libpikawidgets/pikawidgets.h"
#include "tools-types.h"
#include "core/pika.h"
#include "core/pikaimage.h"
#include "core/pikaimage-crop.h"
#include "core/pikaimage-undo.h"
#include "core/pikaitem.h"
#include "core/pikatoolinfo.h"
#include "widgets/pikahelp-ids.h"
#include "display/pikadisplay.h"
#include "display/pikadisplayshell.h"
#include "display/pikatoolrectangle.h"
#include "pikacropoptions.h"
#include "pikacroptool.h"
#include "pikarectangleoptions.h"
#include "pikatoolcontrol.h"
#include "pikatools-utils.h"
#include "pika-intl.h"
static void pika_crop_tool_constructed (GObject *object);
static void pika_crop_tool_dispose (GObject *object);
static void pika_crop_tool_control (PikaTool *tool,
PikaToolAction action,
PikaDisplay *display);
static void pika_crop_tool_button_press (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaButtonPressType press_type,
PikaDisplay *display);
static void pika_crop_tool_button_release (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaButtonReleaseType release_type,
PikaDisplay *display);
static void pika_crop_tool_motion (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaDisplay *display);
static void pika_crop_tool_options_notify (PikaTool *tool,
PikaToolOptions *options,
const GParamSpec *pspec);
static void pika_crop_tool_rectangle_changed (PikaToolWidget *rectangle,
PikaCropTool *crop_tool);
static void pika_crop_tool_rectangle_response (PikaToolWidget *rectangle,
gint response_id,
PikaCropTool *crop_tool);
static void pika_crop_tool_rectangle_change_complete (PikaToolRectangle *rectangle,
PikaCropTool *crop_tool);
static void pika_crop_tool_start (PikaCropTool *crop_tool,
PikaDisplay *display);
static void pika_crop_tool_commit (PikaCropTool *crop_tool);
static void pika_crop_tool_halt (PikaCropTool *crop_tool);
static void pika_crop_tool_update_option_defaults (PikaCropTool *crop_tool,
gboolean ignore_pending);
static PikaRectangleConstraint
pika_crop_tool_get_constraint (PikaCropTool *crop_tool);
static void pika_crop_tool_image_changed (PikaCropTool *crop_tool,
PikaImage *image,
PikaContext *context);
static void pika_crop_tool_image_size_changed (PikaCropTool *crop_tool);
static void pika_crop_tool_image_selected_layers_changed (PikaCropTool *crop_tool);
static void pika_crop_tool_layer_size_changed (PikaCropTool *crop_tool);
static void pika_crop_tool_auto_shrink (PikaCropTool *crop_tool);
G_DEFINE_TYPE (PikaCropTool, pika_crop_tool, PIKA_TYPE_DRAW_TOOL)
#define parent_class pika_crop_tool_parent_class
/* public functions */
void
pika_crop_tool_register (PikaToolRegisterCallback callback,
gpointer data)
{
(* callback) (PIKA_TYPE_CROP_TOOL,
PIKA_TYPE_CROP_OPTIONS,
pika_crop_options_gui,
PIKA_CONTEXT_PROP_MASK_FOREGROUND |
PIKA_CONTEXT_PROP_MASK_BACKGROUND |
PIKA_CONTEXT_PROP_MASK_PATTERN,
"pika-crop-tool",
_("Crop"),
_("Crop Tool: Remove edge areas from image or layer"),
N_("_Crop"), "<shift>C",
NULL, PIKA_HELP_TOOL_CROP,
PIKA_ICON_TOOL_CROP,
data);
}
static void
pika_crop_tool_class_init (PikaCropToolClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
PikaToolClass *tool_class = PIKA_TOOL_CLASS (klass);
object_class->constructed = pika_crop_tool_constructed;
object_class->dispose = pika_crop_tool_dispose;
tool_class->control = pika_crop_tool_control;
tool_class->button_press = pika_crop_tool_button_press;
tool_class->button_release = pika_crop_tool_button_release;
tool_class->motion = pika_crop_tool_motion;
tool_class->options_notify = pika_crop_tool_options_notify;
}
static void
pika_crop_tool_init (PikaCropTool *crop_tool)
{
PikaTool *tool = PIKA_TOOL (crop_tool);
pika_tool_control_set_wants_click (tool->control, TRUE);
pika_tool_control_set_active_modifiers (tool->control,
PIKA_TOOL_ACTIVE_MODIFIERS_SEPARATE);
pika_tool_control_set_precision (tool->control,
PIKA_CURSOR_PRECISION_PIXEL_BORDER);
pika_tool_control_set_cursor (tool->control,
PIKA_CURSOR_CROSSHAIR_SMALL);
pika_tool_control_set_tool_cursor (tool->control,
PIKA_TOOL_CURSOR_CROP);
pika_draw_tool_set_default_status (PIKA_DRAW_TOOL (tool),
_("Click-Drag to draw a crop rectangle"));
}
static void
pika_crop_tool_constructed (GObject *object)
{
PikaCropTool *crop_tool = PIKA_CROP_TOOL (object);
PikaContext *context;
PikaToolInfo *tool_info;
G_OBJECT_CLASS (parent_class)->constructed (object);
tool_info = PIKA_TOOL (crop_tool)->tool_info;
context = pika_get_user_context (tool_info->pika);
g_signal_connect_object (context, "image-changed",
G_CALLBACK (pika_crop_tool_image_changed),
crop_tool,
G_CONNECT_SWAPPED);
/* Make sure we are connected to "size-changed" for the initial
* image.
*/
pika_crop_tool_image_changed (crop_tool,
pika_context_get_image (context),
context);
}
static void
pika_crop_tool_dispose (GObject *object)
{
PikaCropTool *crop_tool = PIKA_CROP_TOOL (object);
/* Clean up current_image and current_layers. */
pika_crop_tool_image_changed (crop_tool, NULL, NULL);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
pika_crop_tool_control (PikaTool *tool,
PikaToolAction action,
PikaDisplay *display)
{
PikaCropTool *crop_tool = PIKA_CROP_TOOL (tool);
switch (action)
{
case PIKA_TOOL_ACTION_PAUSE:
case PIKA_TOOL_ACTION_RESUME:
break;
case PIKA_TOOL_ACTION_HALT:
pika_crop_tool_halt (crop_tool);
break;
case PIKA_TOOL_ACTION_COMMIT:
pika_crop_tool_commit (crop_tool);
break;
}
PIKA_TOOL_CLASS (parent_class)->control (tool, action, display);
}
static void
pika_crop_tool_button_press (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaButtonPressType press_type,
PikaDisplay *display)
{
PikaCropTool *crop_tool = PIKA_CROP_TOOL (tool);
if (tool->display && display != tool->display)
pika_tool_control (tool, PIKA_TOOL_ACTION_HALT, tool->display);
if (! tool->display)
{
pika_crop_tool_start (crop_tool, display);
pika_tool_widget_hover (crop_tool->widget, coords, state, TRUE);
/* HACK: force CREATING on a newly created rectangle; otherwise,
* property bindings would cause the rectangle to start with the
* size from tool options.
*/
pika_tool_rectangle_set_function (PIKA_TOOL_RECTANGLE (crop_tool->widget),
PIKA_TOOL_RECTANGLE_CREATING);
}
if (pika_tool_widget_button_press (crop_tool->widget, coords, time, state,
press_type))
{
crop_tool->grab_widget = crop_tool->widget;
}
pika_tool_control_activate (tool->control);
}
static void
pika_crop_tool_button_release (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaButtonReleaseType release_type,
PikaDisplay *display)
{
PikaCropTool *crop_tool = PIKA_CROP_TOOL (tool);
pika_tool_control_halt (tool->control);
if (crop_tool->grab_widget)
{
pika_tool_widget_button_release (crop_tool->grab_widget,
coords, time, state, release_type);
crop_tool->grab_widget = NULL;
}
pika_tool_push_status (tool, display, _("Click or press Enter to crop"));
}
static void
pika_crop_tool_motion (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaDisplay *display)
{
PikaCropTool *crop_tool = PIKA_CROP_TOOL (tool);
if (crop_tool->grab_widget)
{
pika_tool_widget_motion (crop_tool->grab_widget, coords, time, state);
}
}
static void
pika_crop_tool_options_notify (PikaTool *tool,
PikaToolOptions *options,
const GParamSpec *pspec)
{
PikaCropTool *crop_tool = PIKA_CROP_TOOL (tool);
if (! strcmp (pspec->name, "layer-only") ||
! strcmp (pspec->name, "allow-growing"))
{
if (crop_tool->widget)
{
pika_tool_rectangle_set_constraint (PIKA_TOOL_RECTANGLE (crop_tool->widget),
pika_crop_tool_get_constraint (crop_tool));
}
else
{
pika_crop_tool_update_option_defaults (crop_tool, FALSE);
}
}
}
static void
pika_crop_tool_rectangle_changed (PikaToolWidget *rectangle,
PikaCropTool *crop_tool)
{
}
static void
pika_crop_tool_rectangle_response (PikaToolWidget *rectangle,
gint response_id,
PikaCropTool *crop_tool)
{
PikaTool *tool = PIKA_TOOL (crop_tool);
switch (response_id)
{
case PIKA_TOOL_WIDGET_RESPONSE_CONFIRM:
pika_tool_control (tool, PIKA_TOOL_ACTION_COMMIT, tool->display);
break;
case PIKA_TOOL_WIDGET_RESPONSE_CANCEL:
pika_tool_control (tool, PIKA_TOOL_ACTION_HALT, tool->display);
break;
}
}
static void
pika_crop_tool_rectangle_change_complete (PikaToolRectangle *rectangle,
PikaCropTool *crop_tool)
{
pika_crop_tool_update_option_defaults (crop_tool, FALSE);
}
static void
pika_crop_tool_start (PikaCropTool *crop_tool,
PikaDisplay *display)
{
static const gchar *properties[] =
{
"highlight",
"highlight-opacity",
"guide",
"x",
"y",
"width",
"height",
"fixed-rule-active",
"fixed-rule",
"desired-fixed-width",
"desired-fixed-height",
"desired-fixed-size-width",
"desired-fixed-size-height",
"aspect-numerator",
"aspect-denominator",
"fixed-center"
};
PikaTool *tool = PIKA_TOOL (crop_tool);
PikaDisplayShell *shell = pika_display_get_shell (display);
PikaCropOptions *options = PIKA_CROP_TOOL_GET_OPTIONS (crop_tool);
PikaToolWidget *widget;
gint i;
tool->display = display;
crop_tool->widget = widget = pika_tool_rectangle_new (shell);
g_object_set (widget,
"status-title", _("Crop to: "),
NULL);
pika_draw_tool_set_widget (PIKA_DRAW_TOOL (tool), widget);
for (i = 0; i < G_N_ELEMENTS (properties); i++)
{
GBinding *binding =
g_object_bind_property (G_OBJECT (options), properties[i],
G_OBJECT (widget), properties[i],
G_BINDING_SYNC_CREATE |
G_BINDING_BIDIRECTIONAL);
crop_tool->bindings = g_list_prepend (crop_tool->bindings, binding);
}
pika_rectangle_options_connect (PIKA_RECTANGLE_OPTIONS (options),
pika_display_get_image (shell->display),
G_CALLBACK (pika_crop_tool_auto_shrink),
crop_tool);
pika_tool_rectangle_set_constraint (PIKA_TOOL_RECTANGLE (widget),
pika_crop_tool_get_constraint (crop_tool));
g_signal_connect (widget, "changed",
G_CALLBACK (pika_crop_tool_rectangle_changed),
crop_tool);
g_signal_connect (widget, "response",
G_CALLBACK (pika_crop_tool_rectangle_response),
crop_tool);
g_signal_connect (widget, "change-complete",
G_CALLBACK (pika_crop_tool_rectangle_change_complete),
crop_tool);
pika_draw_tool_start (PIKA_DRAW_TOOL (tool), display);
}
static void
pika_crop_tool_commit (PikaCropTool *crop_tool)
{
PikaTool *tool = PIKA_TOOL (crop_tool);
if (tool->display)
{
PikaCropOptions *options = PIKA_CROP_TOOL_GET_OPTIONS (tool);
PikaImage *image = pika_display_get_image (tool->display);
gdouble x, y;
gdouble x2, y2;
gint w, h;
pika_tool_rectangle_get_public_rect (PIKA_TOOL_RECTANGLE (crop_tool->widget),
&x, &y, &x2, &y2);
w = x2 - x;
h = y2 - y;
pika_tool_pop_status (tool, tool->display);
/* if rectangle exists, crop it */
if (w > 0 && h > 0)
{
if (options->layer_only)
{
GList *layers = pika_image_get_selected_layers (image);
GList *iter;
gint off_x, off_y;
gchar *undo_text;
if (! layers)
{
pika_tool_message_literal (tool, tool->display,
_("There are no selected layers to crop."));
return;
}
for (iter = layers; iter; iter = iter->next)
if (! pika_item_is_content_locked (PIKA_ITEM (iter->data), NULL))
break;
if (iter == NULL)
{
pika_tool_message_literal (tool, tool->display,
_("All selected layers' pixels are locked."));
pika_tools_blink_lock_box (tool->display->pika, PIKA_ITEM (layers->data));
return;
}
undo_text = ngettext ("Resize Layer", "Resize %d layers",
g_list_length (layers));
undo_text = g_strdup_printf (undo_text, g_list_length (layers));
pika_image_undo_group_start (image,
PIKA_UNDO_GROUP_IMAGE_CROP,
undo_text);
g_free (undo_text);
for (iter = layers; iter; iter = iter->next)
{
pika_item_get_offset (PIKA_ITEM (iter->data), &off_x, &off_y);
off_x -= x;
off_y -= y;
pika_item_resize (PIKA_ITEM (iter->data),
PIKA_CONTEXT (options), options->fill_type,
w, h, off_x, off_y);
}
pika_image_undo_group_end (image);
}
else
{
pika_image_crop (image,
PIKA_CONTEXT (options), PIKA_FILL_TRANSPARENT,
x, y, w, h, options->delete_pixels);
}
pika_image_flush (image);
}
}
}
static void
pika_crop_tool_halt (PikaCropTool *crop_tool)
{
PikaTool *tool = PIKA_TOOL (crop_tool);
PikaCropOptions *options = PIKA_CROP_TOOL_GET_OPTIONS (crop_tool);
if (tool->display)
{
PikaDisplayShell *shell = pika_display_get_shell (tool->display);
pika_display_shell_set_highlight (shell, NULL, 0.0);
pika_rectangle_options_disconnect (PIKA_RECTANGLE_OPTIONS (options),
G_CALLBACK (pika_crop_tool_auto_shrink),
crop_tool);
}
if (pika_draw_tool_is_active (PIKA_DRAW_TOOL (tool)))
pika_draw_tool_stop (PIKA_DRAW_TOOL (tool));
/* disconnect bindings manually so they are really gone *now*, we
* might be in the middle of a signal emission that keeps the
* widget and its bindings alive.
*/
g_list_free_full (crop_tool->bindings, (GDestroyNotify) g_object_unref);
crop_tool->bindings = NULL;
pika_draw_tool_set_widget (PIKA_DRAW_TOOL (tool), NULL);
g_clear_object (&crop_tool->widget);
tool->display = NULL;
g_list_free (tool->drawables);
tool->drawables = NULL;
pika_crop_tool_update_option_defaults (crop_tool, TRUE);
}
/**
* pika_crop_tool_update_option_defaults:
* @crop_tool:
* @ignore_pending: %TRUE to ignore any pending crop rectangle.
*
* Sets the default Fixed: Aspect ratio and Fixed: Size option
* properties.
*/
static void
pika_crop_tool_update_option_defaults (PikaCropTool *crop_tool,
gboolean ignore_pending)
{
PikaTool *tool = PIKA_TOOL (crop_tool);
PikaToolRectangle *rectangle = PIKA_TOOL_RECTANGLE (crop_tool->widget);
PikaRectangleOptions *options;
options = PIKA_RECTANGLE_OPTIONS (PIKA_TOOL_GET_OPTIONS (tool));
if (rectangle && ! ignore_pending)
{
/* There is a pending rectangle and we should not ignore it, so
* set default Fixed: Aspect ratio to the same as the current
* pending rectangle width/height.
*/
pika_tool_rectangle_pending_size_set (rectangle,
G_OBJECT (options),
"default-aspect-numerator",
"default-aspect-denominator");
g_object_set (G_OBJECT (options),
"use-string-current", TRUE,
NULL);
}
else
{
/* There is no pending rectangle, set default Fixed: Aspect
* ratio to that of the current image/layer.
*/
if (! rectangle)
{
/* ugly hack: if we don't have a widget, construct a temporary one
* so that we can use it to call
* pika_tool_rectangle_constraint_size_set().
*/
PikaContext *context = pika_get_user_context (tool->tool_info->pika);
PikaDisplay *display = pika_context_get_display (context);
if (display)
{
PikaDisplayShell *shell = pika_display_get_shell (display);
rectangle = PIKA_TOOL_RECTANGLE (pika_tool_rectangle_new (shell));
pika_tool_rectangle_set_constraint (
rectangle, pika_crop_tool_get_constraint (crop_tool));
}
}
if (rectangle)
{
pika_tool_rectangle_constraint_size_set (rectangle,
G_OBJECT (options),
"default-aspect-numerator",
"default-aspect-denominator");
if (! crop_tool->widget)
g_object_unref (rectangle);
}
g_object_set (G_OBJECT (options),
"use-string-current", FALSE,
NULL);
}
}
static PikaRectangleConstraint
pika_crop_tool_get_constraint (PikaCropTool *crop_tool)
{
PikaCropOptions *crop_options = PIKA_CROP_TOOL_GET_OPTIONS (crop_tool);
if (crop_options->allow_growing)
{
return PIKA_RECTANGLE_CONSTRAIN_NONE;
}
else
{
return crop_options->layer_only ? PIKA_RECTANGLE_CONSTRAIN_DRAWABLE :
PIKA_RECTANGLE_CONSTRAIN_IMAGE;
}
}
static void
pika_crop_tool_image_changed (PikaCropTool *crop_tool,
PikaImage *image,
PikaContext *context)
{
if (crop_tool->current_image)
{
g_signal_handlers_disconnect_by_func (crop_tool->current_image,
pika_crop_tool_image_size_changed,
NULL);
g_signal_handlers_disconnect_by_func (crop_tool->current_image,
pika_crop_tool_image_selected_layers_changed,
NULL);
}
g_set_weak_pointer (&crop_tool->current_image, image);
if (crop_tool->current_image)
{
g_signal_connect_object (crop_tool->current_image, "size-changed",
G_CALLBACK (pika_crop_tool_image_size_changed),
crop_tool,
G_CONNECT_SWAPPED);
g_signal_connect_object (crop_tool->current_image, "selected-layers-changed",
G_CALLBACK (pika_crop_tool_image_selected_layers_changed),
crop_tool,
G_CONNECT_SWAPPED);
}
/* Make sure we are connected to "size-changed" for the initial
* layer.
*/
pika_crop_tool_image_selected_layers_changed (crop_tool);
pika_crop_tool_update_option_defaults (PIKA_CROP_TOOL (crop_tool), FALSE);
}
static void
pika_crop_tool_image_size_changed (PikaCropTool *crop_tool)
{
pika_crop_tool_update_option_defaults (crop_tool, FALSE);
}
static void
pika_crop_tool_image_selected_layers_changed (PikaCropTool *crop_tool)
{
GList *iter;
if (crop_tool->current_layers)
{
for (iter = crop_tool->current_layers; iter; iter = iter->next)
{
if (iter->data)
{
g_signal_handlers_disconnect_by_func (iter->data,
pika_crop_tool_layer_size_changed,
NULL);
g_clear_weak_pointer (&iter->data);
}
}
g_list_free (crop_tool->current_layers);
crop_tool->current_layers = NULL;
}
if (crop_tool->current_image)
{
crop_tool->current_layers = pika_image_get_selected_layers (crop_tool->current_image);
crop_tool->current_layers = g_list_copy (crop_tool->current_layers);
}
else
{
crop_tool->current_layers = NULL;
}
if (crop_tool->current_layers)
{
for (iter = crop_tool->current_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);
g_signal_connect_object (iter->data, "size-changed",
G_CALLBACK (pika_crop_tool_layer_size_changed),
crop_tool,
G_CONNECT_SWAPPED);
}
}
pika_crop_tool_update_option_defaults (crop_tool, FALSE);
}
static void
pika_crop_tool_layer_size_changed (PikaCropTool *crop_tool)
{
pika_crop_tool_update_option_defaults (crop_tool, FALSE);
}
static void
pika_crop_tool_auto_shrink (PikaCropTool *crop_tool)
{
gboolean shrink_merged ;
g_object_get (pika_tool_get_options (PIKA_TOOL (crop_tool)),
"shrink-merged", &shrink_merged,
NULL);
pika_tool_rectangle_auto_shrink (PIKA_TOOL_RECTANGLE (crop_tool->widget),
shrink_merged);
}
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