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PIKApp/app/display/pikadisplay.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 "libpikabase/pikabase.h"
#include "libpikamath/pikamath.h"
#include "display-types.h"
#include "tools/tools-types.h"
#include "config/pikaguiconfig.h"
#include "core/pika.h"
#include "core/pikacontainer.h"
#include "core/pikacontext.h"
#include "core/pikaimage.h"
#include "core/pikaprogress.h"
#include "widgets/pikadialogfactory.h"
#include "tools/pikatool.h"
#include "tools/tool_manager.h"
#include "pikadisplay.h"
#include "pikadisplay-handlers.h"
#include "pikadisplayshell.h"
#include "pikadisplayshell-expose.h"
#include "pikadisplayshell-handlers.h"
#include "pikadisplayshell-render.h"
#include "pikadisplayshell-scroll.h"
#include "pikadisplayshell-scrollbars.h"
#include "pikadisplayshell-title.h"
#include "pikadisplayshell-transform.h"
#include "pikaimagewindow.h"
#include "pika-intl.h"
#define PAINT_AREA_CHUNK_WIDTH 32
#define PAINT_AREA_CHUNK_HEIGHT 32
enum
{
PROP_0,
PROP_IMAGE,
PROP_SHELL
};
struct _PikaDisplayImplPrivate
{
PikaImage *image; /* pointer to the associated image */
gint instance; /* the instance # of this display as
* taken from the image at creation */
GeglRectangle bounding_box;
GtkWidget *shell;
cairo_region_t *update_region;
};
/* local function prototypes */
static void pika_display_progress_iface_init (PikaProgressInterface *iface);
static void pika_display_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void pika_display_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static gboolean pika_display_impl_present (PikaDisplay *display);
static gboolean pika_display_impl_grab_focus (PikaDisplay *display);
static PikaProgress * pika_display_progress_start (PikaProgress *progress,
gboolean cancellable,
const gchar *message);
static void pika_display_progress_end (PikaProgress *progress);
static gboolean pika_display_progress_is_active (PikaProgress *progress);
static void pika_display_progress_set_text (PikaProgress *progress,
const gchar *message);
static void pika_display_progress_set_value (PikaProgress *progress,
gdouble percentage);
static gdouble pika_display_progress_get_value (PikaProgress *progress);
static void pika_display_progress_pulse (PikaProgress *progress);
static GBytes * pika_display_progress_get_window_id (PikaProgress *progress);
static gboolean pika_display_progress_message (PikaProgress *progress,
Pika *pika,
PikaMessageSeverity severity,
const gchar *domain,
const gchar *message);
static void pika_display_progress_canceled (PikaProgress *progress,
PikaDisplay *display);
static void pika_display_flush_update_region (PikaDisplay *display);
static void pika_display_paint_area (PikaDisplay *display,
gint x,
gint y,
gint w,
gint h);
G_DEFINE_TYPE_WITH_CODE (PikaDisplayImpl, pika_display_impl, PIKA_TYPE_DISPLAY,
G_ADD_PRIVATE (PikaDisplayImpl)
G_IMPLEMENT_INTERFACE (PIKA_TYPE_PROGRESS,
pika_display_progress_iface_init))
#define parent_class pika_display_impl_parent_class
static void
pika_display_impl_class_init (PikaDisplayImplClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
PikaDisplayClass *display_class = PIKA_DISPLAY_CLASS (klass);
object_class->set_property = pika_display_set_property;
object_class->get_property = pika_display_get_property;
display_class->present = pika_display_impl_present;
display_class->grab_focus = pika_display_impl_grab_focus;
g_object_class_install_property (object_class, PROP_IMAGE,
g_param_spec_object ("image",
NULL, NULL,
PIKA_TYPE_IMAGE,
PIKA_PARAM_READABLE));
g_object_class_install_property (object_class, PROP_SHELL,
g_param_spec_object ("shell",
NULL, NULL,
PIKA_TYPE_DISPLAY_SHELL,
PIKA_PARAM_READABLE));
}
static void
pika_display_impl_init (PikaDisplayImpl *display)
{
display->priv = pika_display_impl_get_instance_private (display);
}
static void
pika_display_progress_iface_init (PikaProgressInterface *iface)
{
iface->start = pika_display_progress_start;
iface->end = pika_display_progress_end;
iface->is_active = pika_display_progress_is_active;
iface->set_text = pika_display_progress_set_text;
iface->set_value = pika_display_progress_set_value;
iface->get_value = pika_display_progress_get_value;
iface->pulse = pika_display_progress_pulse;
iface->get_window_id = pika_display_progress_get_window_id;
iface->message = pika_display_progress_message;
}
static void
pika_display_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
switch (property_id)
{
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
pika_display_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
PikaDisplayImpl *display = PIKA_DISPLAY_IMPL (object);
switch (property_id)
{
case PROP_IMAGE:
g_value_set_object (value, display->priv->image);
break;
case PROP_SHELL:
g_value_set_object (value, display->priv->shell);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static gboolean
pika_display_impl_present (PikaDisplay *display)
{
pika_display_shell_present (pika_display_get_shell (display));
return TRUE;
}
static gboolean
pika_display_impl_grab_focus (PikaDisplay *display)
{
PikaDisplayImpl *display_impl = PIKA_DISPLAY_IMPL (display);
if (display_impl->priv->shell && pika_display_get_image (display))
{
PikaImageWindow *image_window;
image_window = pika_display_shell_get_window (pika_display_get_shell (display));
pika_display_present (display);
gtk_widget_grab_focus (pika_window_get_primary_focus_widget (PIKA_WINDOW (image_window)));
return TRUE;
}
return FALSE;
}
static PikaProgress *
pika_display_progress_start (PikaProgress *progress,
gboolean cancellable,
const gchar *message)
{
PikaDisplayImpl *display = PIKA_DISPLAY_IMPL (progress);
if (display->priv->shell)
return pika_progress_start (PIKA_PROGRESS (display->priv->shell),
cancellable,
"%s", message);
return NULL;
}
static void
pika_display_progress_end (PikaProgress *progress)
{
PikaDisplayImpl *display = PIKA_DISPLAY_IMPL (progress);
if (display->priv->shell)
pika_progress_end (PIKA_PROGRESS (display->priv->shell));
}
static gboolean
pika_display_progress_is_active (PikaProgress *progress)
{
PikaDisplayImpl *display = PIKA_DISPLAY_IMPL (progress);
if (display->priv->shell)
return pika_progress_is_active (PIKA_PROGRESS (display->priv->shell));
return FALSE;
}
static void
pika_display_progress_set_text (PikaProgress *progress,
const gchar *message)
{
PikaDisplayImpl *display = PIKA_DISPLAY_IMPL (progress);
if (display->priv->shell)
pika_progress_set_text_literal (PIKA_PROGRESS (display->priv->shell),
message);
}
static void
pika_display_progress_set_value (PikaProgress *progress,
gdouble percentage)
{
PikaDisplayImpl *display = PIKA_DISPLAY_IMPL (progress);
if (display->priv->shell)
pika_progress_set_value (PIKA_PROGRESS (display->priv->shell),
percentage);
}
static gdouble
pika_display_progress_get_value (PikaProgress *progress)
{
PikaDisplayImpl *display = PIKA_DISPLAY_IMPL (progress);
if (display->priv->shell)
return pika_progress_get_value (PIKA_PROGRESS (display->priv->shell));
return 0.0;
}
static void
pika_display_progress_pulse (PikaProgress *progress)
{
PikaDisplayImpl *display = PIKA_DISPLAY_IMPL (progress);
if (display->priv->shell)
pika_progress_pulse (PIKA_PROGRESS (display->priv->shell));
}
static GBytes *
pika_display_progress_get_window_id (PikaProgress *progress)
{
PikaDisplayImpl *display = PIKA_DISPLAY_IMPL (progress);
if (display->priv->shell)
return pika_progress_get_window_id (PIKA_PROGRESS (display->priv->shell));
return NULL;
}
static gboolean
pika_display_progress_message (PikaProgress *progress,
Pika *pika,
PikaMessageSeverity severity,
const gchar *domain,
const gchar *message)
{
PikaDisplayImpl *display = PIKA_DISPLAY_IMPL (progress);
if (display->priv->shell)
return pika_progress_message (PIKA_PROGRESS (display->priv->shell), pika,
severity, domain, message);
return FALSE;
}
static void
pika_display_progress_canceled (PikaProgress *progress,
PikaDisplay *display)
{
pika_progress_cancel (PIKA_PROGRESS (display));
}
/* public functions */
PikaDisplay *
pika_display_new (Pika *pika,
PikaImage *image,
PikaUnit unit,
gdouble scale,
PikaUIManager *popup_manager,
PikaDialogFactory *dialog_factory,
GdkMonitor *monitor)
{
PikaDisplay *display;
PikaDisplayImplPrivate *private;
PikaImageWindow *window = NULL;
PikaDisplayShell *shell;
g_return_val_if_fail (PIKA_IS_PIKA (pika), NULL);
g_return_val_if_fail (image == NULL || PIKA_IS_IMAGE (image), NULL);
g_return_val_if_fail (GDK_IS_MONITOR (monitor), NULL);
/* If there isn't an interface, never create a display */
if (pika->no_interface)
return NULL;
display = g_object_new (PIKA_TYPE_DISPLAY_IMPL,
"pika", pika,
NULL);
private = PIKA_DISPLAY_IMPL (display)->priv;
/* refs the image */
if (image)
pika_display_set_image (display, image);
/* get an image window */
if (PIKA_GUI_CONFIG (display->config)->single_window_mode)
{
PikaDisplay *active_display;
active_display = pika_context_get_display (pika_get_user_context (pika));
if (! active_display)
{
active_display =
PIKA_DISPLAY (pika_container_get_first_child (pika->displays));
}
if (active_display)
{
PikaDisplayShell *shell = pika_display_get_shell (active_display);
window = pika_display_shell_get_window (shell);
}
}
if (! window)
{
window = pika_image_window_new (pika,
private->image,
dialog_factory,
monitor);
}
/* create the shell for the image */
private->shell = pika_display_shell_new (display, unit, scale,
popup_manager,
monitor);
shell = pika_display_get_shell (display);
pika_display_update_bounding_box (display);
pika_image_window_add_shell (window, shell);
pika_display_shell_present (shell);
/* make sure the docks are visible, in case all other image windows
* are iconified, see bug #686544.
*/
pika_dialog_factory_show_with_display (dialog_factory);
g_signal_connect (pika_display_shell_get_statusbar (shell), "cancel",
G_CALLBACK (pika_display_progress_canceled),
display);
/* add the display to the list */
pika_container_add (pika->displays, PIKA_OBJECT (display));
return display;
}
/**
* pika_display_delete:
* @display:
*
* Closes the display and removes it from the display list. You should
* not call this function directly, use pika_display_close() instead.
*/
void
pika_display_delete (PikaDisplay *display)
{
PikaDisplayImplPrivate *private;
PikaTool *active_tool;
g_return_if_fail (PIKA_IS_DISPLAY (display));
private = PIKA_DISPLAY_IMPL (display)->priv;
/* remove the display from the list */
pika_container_remove (display->pika->displays, PIKA_OBJECT (display));
/* unrefs the image */
pika_display_set_image (display, NULL);
active_tool = tool_manager_get_active (display->pika);
if (active_tool && active_tool->focus_display == display)
tool_manager_focus_display_active (display->pika, NULL);
if (private->shell)
{
PikaDisplayShell *shell = pika_display_get_shell (display);
PikaImageWindow *window = pika_display_shell_get_window (shell);
/* set private->shell to NULL *before* destroying the shell.
* all callbacks in pikadisplayshell-callbacks.c will check
* this pointer and do nothing if the shell is in destruction.
*/
private->shell = NULL;
if (window)
{
if (pika_image_window_get_n_shells (window) > 1)
{
g_object_ref (shell);
pika_image_window_remove_shell (window, shell);
gtk_widget_destroy (GTK_WIDGET (shell));
g_object_unref (shell);
}
else
{
pika_image_window_destroy (window);
}
}
else
{
g_object_unref (shell);
}
}
g_object_unref (display);
}
/**
* pika_display_close:
* @display:
*
* Closes the display. If this is the last display, it will remain
* open, but without an image.
*/
void
pika_display_close (PikaDisplay *display)
{
g_return_if_fail (PIKA_IS_DISPLAY (display));
if (pika_container_get_n_children (display->pika->displays) > 1)
{
pika_display_delete (display);
}
else
{
pika_display_empty (display);
}
}
/**
* pika_display_get_action_name:
* @display:
*
* Returns: The action name for the given display. The action name
* depends on the display ID. The result must be freed with g_free().
**/
gchar *
pika_display_get_action_name (PikaDisplay *display)
{
g_return_val_if_fail (PIKA_IS_DISPLAY (display), NULL);
return g_strdup_printf ("windows-display-%04d",
pika_display_get_id (display));
}
PikaImage *
pika_display_get_image (PikaDisplay *display)
{
g_return_val_if_fail (PIKA_IS_DISPLAY (display), NULL);
return PIKA_DISPLAY_IMPL (display)->priv->image;
}
void
pika_display_set_image (PikaDisplay *display,
PikaImage *image)
{
PikaDisplayImplPrivate *private;
PikaImage *old_image = NULL;
PikaDisplayShell *shell;
g_return_if_fail (PIKA_IS_DISPLAY (display));
g_return_if_fail (image == NULL || PIKA_IS_IMAGE (image));
private = PIKA_DISPLAY_IMPL (display)->priv;
shell = pika_display_get_shell (display);
if (private->image)
{
/* stop any active tool */
tool_manager_control_active (display->pika, PIKA_TOOL_ACTION_HALT,
display);
pika_display_shell_disconnect (shell);
pika_display_disconnect (display);
g_clear_pointer (&private->update_region, cairo_region_destroy);
pika_image_dec_display_count (private->image);
/* set private->image before unrefing because there may be code
* that listens for image removals and then iterates the
* display list to find a valid display.
*/
old_image = private->image;
#if 0
g_print ("%s: image->ref_count before unrefing: %d\n",
G_STRFUNC, G_OBJECT (old_image)->ref_count);
#endif
}
private->image = image;
if (image)
{
#if 0
g_print ("%s: image->ref_count before refing: %d\n",
G_STRFUNC, G_OBJECT (image)->ref_count);
#endif
g_object_ref (image);
private->instance = pika_image_get_instance_count (image);
pika_image_inc_instance_count (image);
pika_image_inc_display_count (image);
pika_display_connect (display);
if (shell)
pika_display_shell_connect (shell);
}
if (old_image)
g_object_unref (old_image);
pika_display_update_bounding_box (display);
if (shell)
{
if (image)
{
pika_display_shell_reconnect (shell);
}
else
{
pika_display_shell_title_update (shell);
}
}
if (old_image != image)
g_object_notify (G_OBJECT (display), "image");
}
gint
pika_display_get_instance (PikaDisplay *display)
{
g_return_val_if_fail (PIKA_IS_DISPLAY (display), 0);
return PIKA_DISPLAY_IMPL (display)->priv->instance;
}
PikaDisplayShell *
pika_display_get_shell (PikaDisplay *display)
{
g_return_val_if_fail (PIKA_IS_DISPLAY (display), NULL);
return PIKA_DISPLAY_SHELL (PIKA_DISPLAY_IMPL (display)->priv->shell);
}
void
pika_display_empty (PikaDisplay *display)
{
PikaDisplayImplPrivate *private;
GList *iter;
g_return_if_fail (PIKA_IS_DISPLAY (display));
private = PIKA_DISPLAY_IMPL (display)->priv;
g_return_if_fail (PIKA_IS_IMAGE (private->image));
for (iter = display->pika->context_list; iter; iter = g_list_next (iter))
{
PikaContext *context = iter->data;
if (pika_context_get_display (context) == display)
pika_context_set_image (context, NULL);
}
pika_display_set_image (display, NULL);
pika_display_shell_empty (pika_display_get_shell (display));
}
void
pika_display_fill (PikaDisplay *display,
PikaImage *image,
PikaUnit unit,
gdouble scale)
{
PikaDisplayImplPrivate *private;
g_return_if_fail (PIKA_IS_DISPLAY (display));
g_return_if_fail (PIKA_IS_IMAGE (image));
private = PIKA_DISPLAY_IMPL (display)->priv;
g_return_if_fail (private->image == NULL);
pika_display_set_image (display, image);
pika_display_shell_fill (pika_display_get_shell (display),
image, unit, scale);
}
void
pika_display_update_bounding_box (PikaDisplay *display)
{
PikaDisplayImplPrivate *private;
PikaDisplayShell *shell;
GeglRectangle bounding_box = {};
g_return_if_fail (PIKA_IS_DISPLAY (display));
private = PIKA_DISPLAY_IMPL (display)->priv;
shell = pika_display_get_shell (display);
if (shell)
{
bounding_box = pika_display_shell_get_bounding_box (shell);
if (! gegl_rectangle_equal (&bounding_box, &private->bounding_box))
{
GeglRectangle diff_rects[4];
gint n_diff_rects;
gint i;
n_diff_rects = gegl_rectangle_subtract (diff_rects,
&private->bounding_box,
&bounding_box);
for (i = 0; i < n_diff_rects; i++)
{
pika_display_paint_area (display,
diff_rects[i].x, diff_rects[i].y,
diff_rects[i].width, diff_rects[i].height);
}
private->bounding_box = bounding_box;
pika_display_shell_scroll_clamp_and_update (shell);
pika_display_shell_scrollbars_update (shell);
}
}
else
{
private->bounding_box = bounding_box;
}
}
void
pika_display_update_area (PikaDisplay *display,
gboolean now,
gint x,
gint y,
gint w,
gint h)
{
PikaDisplayImplPrivate *private;
g_return_if_fail (PIKA_IS_DISPLAY (display));
private = PIKA_DISPLAY_IMPL (display)->priv;
if (now)
{
pika_display_paint_area (display, x, y, w, h);
}
else
{
cairo_rectangle_int_t rect;
gint image_width;
gint image_height;
image_width = pika_image_get_width (private->image);
image_height = pika_image_get_height (private->image);
rect.x = CLAMP (x, 0, image_width);
rect.y = CLAMP (y, 0, image_height);
rect.width = CLAMP (x + w, 0, image_width) - rect.x;
rect.height = CLAMP (y + h, 0, image_height) - rect.y;
if (private->update_region)
cairo_region_union_rectangle (private->update_region, &rect);
else
private->update_region = cairo_region_create_rectangle (&rect);
}
}
void
pika_display_flush (PikaDisplay *display)
{
g_return_if_fail (PIKA_IS_DISPLAY (display));
/* FIXME: we can end up being called during shell construction if "show all"
* is enabled by default, in which case the shell's display pointer is still
* NULL
*/
if (pika_display_get_shell (display))
{
pika_display_flush_update_region (display);
pika_display_shell_flush (pika_display_get_shell (display));
}
}
void
pika_display_flush_now (PikaDisplay *display)
{
g_return_if_fail (PIKA_IS_DISPLAY (display));
pika_display_flush_update_region (display);
}
/* private functions */
static void
pika_display_flush_update_region (PikaDisplay *display)
{
PikaDisplayImplPrivate *private = PIKA_DISPLAY_IMPL (display)->priv;
if (private->update_region)
{
gint n_rects = cairo_region_num_rectangles (private->update_region);
gint i;
for (i = 0; i < n_rects; i++)
{
cairo_rectangle_int_t rect;
cairo_region_get_rectangle (private->update_region,
i, &rect);
pika_display_paint_area (display,
rect.x,
rect.y,
rect.width,
rect.height);
}
g_clear_pointer (&private->update_region, cairo_region_destroy);
}
}
static void
pika_display_paint_area (PikaDisplay *display,
gint x,
gint y,
gint w,
gint h)
{
PikaDisplayImplPrivate *private = PIKA_DISPLAY_IMPL (display)->priv;
PikaDisplayShell *shell = pika_display_get_shell (display);
GeglRectangle rect;
gint x1, y1, x2, y2;
gdouble x1_f, y1_f, x2_f, y2_f;
if (! gegl_rectangle_intersect (&rect,
&private->bounding_box,
GEGL_RECTANGLE (x, y, w, h)))
{
return;
}
/* display the area */
pika_display_shell_transform_bounds (shell,
rect.x,
rect.y,
rect.x + rect.width,
rect.y + rect.height,
&x1_f, &y1_f, &x2_f, &y2_f);
/* make sure to expose a superset of the transformed sub-pixel expose
* area, not a subset. bug #126942. --mitch
*
* also accommodate for spill introduced by potential box filtering.
* (bug #474509). --simon
*/
x1 = floor (x1_f - 0.5);
y1 = floor (y1_f - 0.5);
x2 = ceil (x2_f + 0.5);
y2 = ceil (y2_f + 0.5);
/* align transformed area to a coarse grid, to simplify the
* invalidated area
*/
x1 = floor ((gdouble) x1 / PAINT_AREA_CHUNK_WIDTH) * PAINT_AREA_CHUNK_WIDTH;
y1 = floor ((gdouble) y1 / PAINT_AREA_CHUNK_HEIGHT) * PAINT_AREA_CHUNK_HEIGHT;
x2 = ceil ((gdouble) x2 / PAINT_AREA_CHUNK_WIDTH) * PAINT_AREA_CHUNK_WIDTH;
y2 = ceil ((gdouble) y2 / PAINT_AREA_CHUNK_HEIGHT) * PAINT_AREA_CHUNK_HEIGHT;
pika_display_shell_expose_area (shell, x1, y1, x2 - x1, y2 - y1);
pika_display_shell_render_invalidate_area (shell, x1, y1, x2 - x1, y2 - y1);
}
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