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PIKApp
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PIKApp/app/display/pikacanvastextcursor.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
*
* pikacanvastextcursor.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 "pikacanvastextcursor.h"
#include "pikadisplayshell.h"
enum
{
PROP_0,
PROP_X,
PROP_Y,
PROP_WIDTH,
PROP_HEIGHT,
PROP_OVERWRITE,
PROP_DIRECTION
};
typedef struct _PikaCanvasTextCursorPrivate PikaCanvasTextCursorPrivate;
struct _PikaCanvasTextCursorPrivate
{
gint x;
gint y;
gint width;
gint height;
gboolean overwrite;
PikaTextDirection direction;
};
#define GET_PRIVATE(text_cursor) \
((PikaCanvasTextCursorPrivate *) pika_canvas_text_cursor_get_instance_private ((PikaCanvasTextCursor *) (text_cursor)))
/* local function prototypes */
static void pika_canvas_text_cursor_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void pika_canvas_text_cursor_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void pika_canvas_text_cursor_draw (PikaCanvasItem *item,
cairo_t *cr);
static cairo_region_t * pika_canvas_text_cursor_get_extents (PikaCanvasItem *item);
G_DEFINE_TYPE_WITH_PRIVATE (PikaCanvasTextCursor, pika_canvas_text_cursor,
PIKA_TYPE_CANVAS_ITEM)
#define parent_class pika_canvas_text_cursor_parent_class
static void
pika_canvas_text_cursor_class_init (PikaCanvasTextCursorClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
PikaCanvasItemClass *item_class = PIKA_CANVAS_ITEM_CLASS (klass);
object_class->set_property = pika_canvas_text_cursor_set_property;
object_class->get_property = pika_canvas_text_cursor_get_property;
item_class->draw = pika_canvas_text_cursor_draw;
item_class->get_extents = pika_canvas_text_cursor_get_extents;
g_object_class_install_property (object_class, PROP_X,
g_param_spec_int ("x", NULL, NULL,
-PIKA_MAX_IMAGE_SIZE,
PIKA_MAX_IMAGE_SIZE, 0,
PIKA_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_Y,
g_param_spec_int ("y", NULL, NULL,
-PIKA_MAX_IMAGE_SIZE,
PIKA_MAX_IMAGE_SIZE, 0,
PIKA_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_WIDTH,
g_param_spec_int ("width", NULL, NULL,
-PIKA_MAX_IMAGE_SIZE,
PIKA_MAX_IMAGE_SIZE, 0,
PIKA_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_HEIGHT,
g_param_spec_int ("height", NULL, NULL,
-PIKA_MAX_IMAGE_SIZE,
PIKA_MAX_IMAGE_SIZE, 0,
PIKA_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_OVERWRITE,
g_param_spec_boolean ("overwrite", NULL, NULL,
FALSE,
PIKA_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_DIRECTION,
g_param_spec_enum ("direction", NULL, NULL,
pika_text_direction_get_type(),
PIKA_TEXT_DIRECTION_LTR,
PIKA_PARAM_READWRITE));
}
static void
pika_canvas_text_cursor_init (PikaCanvasTextCursor *text_cursor)
{
}
static void
pika_canvas_text_cursor_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
PikaCanvasTextCursorPrivate *private = GET_PRIVATE (object);
switch (property_id)
{
case PROP_X:
private->x = g_value_get_int (value);
break;
case PROP_Y:
private->y = g_value_get_int (value);
break;
case PROP_WIDTH:
private->width = g_value_get_int (value);
break;
case PROP_HEIGHT:
private->height = g_value_get_int (value);
break;
case PROP_OVERWRITE:
private->overwrite = g_value_get_boolean (value);
break;
case PROP_DIRECTION:
private->direction = g_value_get_enum (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
pika_canvas_text_cursor_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
PikaCanvasTextCursorPrivate *private = GET_PRIVATE (object);
switch (property_id)
{
case PROP_X:
g_value_set_int (value, private->x);
break;
case PROP_Y:
g_value_set_int (value, private->y);
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_OVERWRITE:
g_value_set_boolean (value, private->overwrite);
break;
case PROP_DIRECTION:
g_value_set_enum (value, private->direction);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
pika_canvas_text_cursor_transform (PikaCanvasItem *item,
gdouble *x,
gdouble *y,
gdouble *w,
gdouble *h)
{
PikaCanvasTextCursorPrivate *private = GET_PRIVATE (item);
pika_canvas_item_transform_xy_f (item,
MIN (private->x,
private->x + private->width),
MIN (private->y,
private->y + private->height),
x, y);
pika_canvas_item_transform_xy_f (item,
MAX (private->x,
private->x + private->width),
MAX (private->y,
private->y + private->height),
w, h);
*w -= *x;
*h -= *y;
*x = floor (*x) + 0.5;
*y = floor (*y) + 0.5;
switch (private->direction)
{
case PIKA_TEXT_DIRECTION_LTR:
case PIKA_TEXT_DIRECTION_RTL:
break;
case PIKA_TEXT_DIRECTION_TTB_RTL:
case PIKA_TEXT_DIRECTION_TTB_RTL_UPRIGHT:
*x = *x - *w;
break;
case PIKA_TEXT_DIRECTION_TTB_LTR:
case PIKA_TEXT_DIRECTION_TTB_LTR_UPRIGHT:
*y = *y + *h;
break;
}
if (private->overwrite)
{
*w = ceil (*w) - 1.0;
*h = ceil (*h) - 1.0;
}
else
{
switch (private->direction)
{
case PIKA_TEXT_DIRECTION_LTR:
case PIKA_TEXT_DIRECTION_RTL:
*w = 0;
*h = ceil (*h) - 1.0;
break;
case PIKA_TEXT_DIRECTION_TTB_RTL:
case PIKA_TEXT_DIRECTION_TTB_RTL_UPRIGHT:
*w = ceil (*w) - 1.0;
*h = 0;
break;
case PIKA_TEXT_DIRECTION_TTB_LTR:
case PIKA_TEXT_DIRECTION_TTB_LTR_UPRIGHT:
*w = ceil (*w) - 1.0;
*h = 0;
break;
}
}
}
static void
pika_canvas_text_cursor_draw (PikaCanvasItem *item,
cairo_t *cr)
{
PikaCanvasTextCursorPrivate *private = GET_PRIVATE (item);
gdouble x, y;
gdouble w, h;
pika_canvas_text_cursor_transform (item, &x, &y, &w, &h);
if (private->overwrite)
{
cairo_rectangle (cr, x, y, w, h);
}
else
{
switch (private->direction)
{
case PIKA_TEXT_DIRECTION_LTR:
case PIKA_TEXT_DIRECTION_RTL:
cairo_move_to (cr, x, y);
cairo_line_to (cr, x, y + h);
cairo_move_to (cr, x - 3.0, y);
cairo_line_to (cr, x + 3.0, y);
cairo_move_to (cr, x - 3.0, y + h);
cairo_line_to (cr, x + 3.0, y + h);
break;
case PIKA_TEXT_DIRECTION_TTB_RTL:
case PIKA_TEXT_DIRECTION_TTB_RTL_UPRIGHT:
case PIKA_TEXT_DIRECTION_TTB_LTR:
case PIKA_TEXT_DIRECTION_TTB_LTR_UPRIGHT:
cairo_move_to (cr, x, y);
cairo_line_to (cr, x + w, y);
cairo_move_to (cr, x, y - 3.0);
cairo_line_to (cr, x, y + 3.0);
cairo_move_to (cr, x + w, y - 3.0);
cairo_line_to (cr, x + w, y + 3.0);
break;
}
}
_pika_canvas_item_stroke (item, cr);
}
static cairo_region_t *
pika_canvas_text_cursor_get_extents (PikaCanvasItem *item)
{
PikaCanvasTextCursorPrivate *private = GET_PRIVATE (item);
cairo_rectangle_int_t rectangle;
gdouble x, y;
gdouble w, h;
pika_canvas_text_cursor_transform (item, &x, &y, &w, &h);
if (private->overwrite)
{
rectangle.x = floor (x - 1.5);
rectangle.y = floor (y - 1.5);
rectangle.width = ceil (w + 3.0);
rectangle.height = ceil (h + 3.0);
}
else
{
switch (private->direction)
{
case PIKA_TEXT_DIRECTION_LTR:
case PIKA_TEXT_DIRECTION_RTL:
rectangle.x = floor (x - 4.5);
rectangle.y = floor (y - 1.5);
rectangle.width = ceil (9.0);
rectangle.height = ceil (h + 3.0);
break;
case PIKA_TEXT_DIRECTION_TTB_RTL:
case PIKA_TEXT_DIRECTION_TTB_RTL_UPRIGHT:
case PIKA_TEXT_DIRECTION_TTB_LTR:
case PIKA_TEXT_DIRECTION_TTB_LTR_UPRIGHT:
rectangle.x = floor (x - 1.5);
rectangle.y = floor (y - 4.5);
rectangle.width = ceil (w + 3.0);
rectangle.height = ceil (9.0);
break;
}
}
return cairo_region_create_rectangle (&rectangle);
}
PikaCanvasItem *
pika_canvas_text_cursor_new (PikaDisplayShell *shell,
PangoRectangle *cursor,
gboolean overwrite,
PikaTextDirection direction)
{
g_return_val_if_fail (PIKA_IS_DISPLAY_SHELL (shell), NULL);
g_return_val_if_fail (cursor != NULL, NULL);
return g_object_new (PIKA_TYPE_CANVAS_TEXT_CURSOR,
"shell", shell,
"x", cursor->x,
"y", cursor->y,
"width", cursor->width,
"height", cursor->height,
"overwrite", overwrite,
"direction", direction,
NULL);
}
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