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gimp/app/core/gimp-utils.c

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/* GIMP - The GNU Image Manipulation Program
* 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 <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <locale.h>
#ifdef HAVE__NL_MEASUREMENT_MEASUREMENT
#include <langinfo.h>
#endif
#include <glib-object.h>
#include <gobject/gvaluecollector.h>
#include "libgimpbase/gimpbase.h"
#include "libgimpmath/gimpmath.h"
#include "libgimpcolor/gimpcolor.h"
#include "libgimpconfig/gimpconfig.h"
#include "core-types.h"
#include "base/base-utils.h"
#include "config/gimpbaseconfig.h"
#include "gimp.h"
#include "gimp-utils.h"
#include "gimpcontainer.h"
#include "gimpcontext.h"
#include "gimpparamspecs.h"
gint64
gimp_g_type_instance_get_memsize (GTypeInstance *instance)
{
if (instance)
{
GTypeQuery type_query;
g_type_query (G_TYPE_FROM_INSTANCE (instance), &type_query);
return type_query.instance_size;
}
return 0;
}
gint64
gimp_g_object_get_memsize (GObject *object)
{
if (object)
return gimp_g_type_instance_get_memsize ((GTypeInstance *) object);
return 0;
}
gint64
gimp_g_hash_table_get_memsize (GHashTable *hash,
gint64 data_size)
{
if (hash)
return (2 * sizeof (gint) +
5 * sizeof (gpointer) +
g_hash_table_size (hash) * (3 * sizeof (gpointer) + data_size));
return 0;
}
typedef struct
{
GimpMemsizeFunc func;
gint64 memsize;
gint64 gui_size;
} HashMemsize;
static void
hash_memsize_foreach (gpointer key,
gpointer value,
HashMemsize *memsize)
{
gint64 gui_size = 0;
memsize->memsize += memsize->func (value, &gui_size);
memsize->gui_size += gui_size;
}
gint64
gimp_g_hash_table_get_memsize_foreach (GHashTable *hash,
GimpMemsizeFunc func,
gint64 *gui_size)
{
HashMemsize memsize;
g_return_val_if_fail (func != NULL, 0);
if (! hash)
return 0;
memsize.func = func;
memsize.memsize = 0;
memsize.gui_size = 0;
g_hash_table_foreach (hash, (GHFunc) hash_memsize_foreach, &memsize);
if (gui_size)
*gui_size = memsize.gui_size;
return memsize.memsize + gimp_g_hash_table_get_memsize (hash, 0);
}
gint64
gimp_g_slist_get_memsize (GSList *slist,
gint64 data_size)
{
return g_slist_length (slist) * (data_size + sizeof (GSList));
}
gint64
gimp_g_slist_get_memsize_foreach (GSList *slist,
GimpMemsizeFunc func,
gint64 *gui_size)
{
GSList *l;
gint64 memsize = 0;
g_return_val_if_fail (func != NULL, 0);
for (l = slist; l; l = g_slist_next (l))
memsize += sizeof (GSList) + func (l->data, gui_size);
return memsize;
}
gint64
gimp_g_list_get_memsize (GList *list,
gint64 data_size)
{
return g_list_length (list) * (data_size + sizeof (GList));
}
gint64
gimp_g_list_get_memsize_foreach (GList *list,
GimpMemsizeFunc func,
gint64 *gui_size)
{
GList *l;
gint64 memsize = 0;
g_return_val_if_fail (func != NULL, 0);
for (l = list; l; l = g_list_next (l))
memsize += sizeof (GList) + func (l->data, gui_size);
return memsize;
}
gint64
gimp_g_value_get_memsize (GValue *value)
{
gint64 memsize = 0;
if (! value)
return 0;
if (G_VALUE_HOLDS_STRING (value))
{
memsize += gimp_string_get_memsize (g_value_get_string (value));
}
else if (G_VALUE_HOLDS_BOXED (value))
{
if (GIMP_VALUE_HOLDS_RGB (value))
{
memsize += sizeof (GimpRGB);
}
else if (GIMP_VALUE_HOLDS_MATRIX2 (value))
{
memsize += sizeof (GimpMatrix2);
}
else if (GIMP_VALUE_HOLDS_PARASITE (value))
{
memsize += gimp_parasite_get_memsize (g_value_get_boxed (value),
NULL);
}
else if (GIMP_VALUE_HOLDS_ARRAY (value) ||
GIMP_VALUE_HOLDS_INT8_ARRAY (value) ||
GIMP_VALUE_HOLDS_INT16_ARRAY (value) ||
GIMP_VALUE_HOLDS_INT32_ARRAY (value) ||
GIMP_VALUE_HOLDS_FLOAT_ARRAY (value))
{
GimpArray *array = g_value_get_boxed (value);
if (array)
memsize += (sizeof (GimpArray) +
array->static_data ? 0 : array->length);
}
else if (GIMP_VALUE_HOLDS_STRING_ARRAY (value))
{
GimpArray *array = g_value_get_boxed (value);
if (array)
{
memsize += sizeof (GimpArray);
if (! array->static_data)
{
gchar **tmp = (gchar **) array->data;
gint i;
memsize += array->length * sizeof (gchar *);
for (i = 0; i < array->length; i++)
memsize += gimp_string_get_memsize (tmp[i]);
}
}
}
else
{
g_printerr ("%s: unhandled boxed value type: %s\n",
G_STRFUNC, G_VALUE_TYPE_NAME (value));
}
}
else if (G_VALUE_HOLDS_OBJECT (value))
{
g_printerr ("%s: unhandled object value type: %s\n",
G_STRFUNC, G_VALUE_TYPE_NAME (value));
}
return memsize + sizeof (GValue);
}
gint64
gimp_g_param_spec_get_memsize (GParamSpec *pspec)
{
gint64 memsize = 0;
if (! pspec)
return 0;
if (! (pspec->flags & G_PARAM_STATIC_NAME))
memsize += gimp_string_get_memsize (g_param_spec_get_name (pspec));
if (! (pspec->flags & G_PARAM_STATIC_NICK))
memsize += gimp_string_get_memsize (g_param_spec_get_nick (pspec));
if (! (pspec->flags & G_PARAM_STATIC_BLURB))
memsize += gimp_string_get_memsize (g_param_spec_get_blurb (pspec));
return memsize + gimp_g_type_instance_get_memsize ((GTypeInstance *) pspec);
}
gint64
gimp_string_get_memsize (const gchar *string)
{
if (string)
return strlen (string) + 1;
return 0;
}
gint64
gimp_parasite_get_memsize (GimpParasite *parasite,
gint64 *gui_size)
{
if (parasite)
return (sizeof (GimpParasite) +
gimp_string_get_memsize (parasite->name) +
parasite->size);
return 0;
}
/*
* basically copied from gtk_get_default_language()
*/
gchar *
gimp_get_default_language (const gchar *category)
{
gchar *lang;
gchar *p;
gint cat = LC_CTYPE;
if (! category)
category = "LC_CTYPE";
#ifdef G_OS_WIN32
p = getenv ("LC_ALL");
if (p != NULL)
lang = g_strdup (p);
else
{
p = getenv ("LANG");
if (p != NULL)
lang = g_strdup (p);
else
{
p = getenv (category);
if (p != NULL)
lang = g_strdup (p);
else
lang = g_win32_getlocale ();
}
}
#else
if (strcmp (category, "LC_CTYPE") == 0)
cat = LC_CTYPE;
else if (strcmp (category, "LC_MESSAGES") == 0)
cat = LC_MESSAGES;
else
g_warning ("unsupported category used with gimp_get_default_language()");
lang = g_strdup (setlocale (cat, NULL));
#endif
p = strchr (lang, '.');
if (p)
*p = '\0';
p = strchr (lang, '@');
if (p)
*p = '\0';
return lang;
}
GimpUnit
gimp_get_default_unit (void)
{
#ifdef HAVE__NL_MEASUREMENT_MEASUREMENT
const gchar *measurement = nl_langinfo (_NL_MEASUREMENT_MEASUREMENT);
switch (*((guchar *) measurement))
{
case 1: /* metric */
return GIMP_UNIT_MM;
case 2: /* imperial */
return GIMP_UNIT_INCH;
}
#endif
return GIMP_UNIT_MM;
}
GParameter *
gimp_parameters_append (GType object_type,
GParameter *params,
gint *n_params,
...)
{
va_list args;
g_return_val_if_fail (g_type_is_a (object_type, G_TYPE_OBJECT), NULL);
g_return_val_if_fail (n_params != NULL, NULL);
g_return_val_if_fail (params != NULL || *n_params == 0, NULL);
va_start (args, n_params);
params = gimp_parameters_append_valist (object_type, params, n_params, args);
va_end (args);
return params;
}
GParameter *
gimp_parameters_append_valist (GType object_type,
GParameter *params,
gint *n_params,
va_list args)
{
GObjectClass *object_class;
gchar *param_name;
g_return_val_if_fail (g_type_is_a (object_type, G_TYPE_OBJECT), NULL);
g_return_val_if_fail (n_params != NULL, NULL);
g_return_val_if_fail (params != NULL || *n_params == 0, NULL);
object_class = g_type_class_ref (object_type);
param_name = va_arg (args, gchar *);
while (param_name)
{
gchar *error = NULL;
GParamSpec *pspec = g_object_class_find_property (object_class,
param_name);
if (! pspec)
{
g_warning ("%s: object class `%s' has no property named `%s'",
G_STRFUNC, g_type_name (object_type), param_name);
break;
}
params = g_renew (GParameter, params, *n_params + 1);
params[*n_params].name = param_name;
params[*n_params].value.g_type = 0;
g_value_init (&params[*n_params].value, G_PARAM_SPEC_VALUE_TYPE (pspec));
G_VALUE_COLLECT (&params[*n_params].value, args, 0, &error);
if (error)
{
g_warning ("%s: %s", G_STRFUNC, error);
g_free (error);
g_value_unset (&params[*n_params].value);
break;
}
*n_params = *n_params + 1;
param_name = va_arg (args, gchar *);
}
g_type_class_unref (object_class);
return params;
}
void
gimp_parameters_free (GParameter *params,
gint n_params)
{
g_return_if_fail (params != NULL || n_params == 0);
if (params)
{
gint i;
for (i = 0; i < n_params; i++)
g_value_unset (&params[i].value);
g_free (params);
}
}
void
gimp_value_array_truncate (GValueArray *args,
gint n_values)
{
gint i;
g_return_if_fail (args != NULL);
g_return_if_fail (n_values > 0 && n_values <= args->n_values);
for (i = args->n_values; i > n_values; i--)
g_value_array_remove (args, i - 1);
}
gchar *
gimp_get_temp_filename (Gimp *gimp,
const gchar *extension)
{
static gint id = 0;
static gint pid;
gchar *filename;
gchar *basename;
gchar *path;
g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
if (id == 0)
pid = get_pid ();
if (extension)
basename = g_strdup_printf ("gimp-temp-%d%d.%s", pid, id++, extension);
else
basename = g_strdup_printf ("gimp-temp-%d%d", pid, id++);
path = gimp_config_path_expand (GIMP_BASE_CONFIG (gimp->config)->temp_path,
TRUE, NULL);
filename = g_build_filename (path, basename, NULL);
g_free (path);
g_free (basename);
return filename;
}
GimpObject *
gimp_container_get_neighbor_of_active (GimpContainer *container,
GimpContext *context,
GimpObject *active)
{
g_return_val_if_fail (GIMP_IS_CONTAINER (container), NULL);
g_return_val_if_fail (GIMP_IS_CONTEXT (context), NULL);
g_return_val_if_fail (GIMP_IS_OBJECT (active), NULL);
if (active == gimp_context_get_by_type (context,
gimp_container_get_children_type (container)))
{
gint index = gimp_container_get_child_index (container, active);
if (index != -1)
{
GimpObject *new;
new = gimp_container_get_child_by_index (container, index + 1);
if (! new && index > 0)
new = gimp_container_get_child_by_index (container, index - 1);
return new;
}
}
return NULL;
}
/* markup unescape code stolen and adapted from gmarkup.c
*/
static gchar *
char_str (gunichar c,
gchar *buf)
{
memset (buf, 0, 8);
g_unichar_to_utf8 (c, buf);
return buf;
}
static gboolean
unescape_gstring (GString *string)
{
const gchar *from;
gchar *to;
/*
* Meeks' theorum: unescaping can only shrink text.
* for &lt; etc. this is obvious, for &#xffff; more
* thought is required, but this is patently so.
*/
for (from = to = string->str; *from != '\0'; from++, to++)
{
*to = *from;
if (*to == '\r')
{
*to = '\n';
if (from[1] == '\n')
from++;
}
if (*from == '&')
{
from++;
if (*from == '#')
{
gboolean is_hex = FALSE;
gulong l;
gchar *end = NULL;
from++;
if (*from == 'x')
{
is_hex = TRUE;
from++;
}
/* digit is between start and p */
errno = 0;
if (is_hex)
l = strtoul (from, &end, 16);
else
l = strtoul (from, &end, 10);
if (end == from || errno != 0)
{
return FALSE;
}
else if (*end != ';')
{
return FALSE;
}
else
{
/* characters XML 1.1 permits */
if ((0 < l && l <= 0xD7FF) ||
(0xE000 <= l && l <= 0xFFFD) ||
(0x10000 <= l && l <= 0x10FFFF))
{
gchar buf[8];
char_str (l, buf);
strcpy (to, buf);
to += strlen (buf) - 1;
from = end;
}
else
{
return FALSE;
}
}
}
else if (strncmp (from, "lt;", 3) == 0)
{
*to = '<';
from += 2;
}
else if (strncmp (from, "gt;", 3) == 0)
{
*to = '>';
from += 2;
}
else if (strncmp (from, "amp;", 4) == 0)
{
*to = '&';
from += 3;
}
else if (strncmp (from, "quot;", 5) == 0)
{
*to = '"';
from += 4;
}
else if (strncmp (from, "apos;", 5) == 0)
{
*to = '\'';
from += 4;
}
else
{
return FALSE;
}
}
}
g_assert (to - string->str <= string->len);
if (to - string->str != string->len)
g_string_truncate (string, to - string->str);
return TRUE;
}
gchar *
gimp_markup_extract_text (const gchar *markup)
{
GString *string;
const gchar *p;
gboolean in_tag = FALSE;
if (! markup)
return NULL;
string = g_string_new (NULL);
for (p = markup; *p; p++)
{
if (in_tag)
{
if (*p == '>')
in_tag = FALSE;
}
else
{
if (*p == '<')
in_tag = TRUE;
else
g_string_append_c (string, *p);
}
}
unescape_gstring (string);
return g_string_free (string, FALSE);
}
/**
* gimp_utils_point_to_line_distance:
* @point: The point to calculate the distance for.
* @point_on_line: A point on the line.
* @line_direction: Normalized line direction vector.
* @closest_line_point: Gets set to the point on the line that is
* closest to @point.
*
* Returns: The shortest distance from @point to the line defined by
* @point_on_line and @normalized_line_direction.
**/
static gdouble
gimp_utils_point_to_line_distance (const GimpVector2 *point,
const GimpVector2 *point_on_line,
const GimpVector2 *line_direction,
GimpVector2 *closest_line_point)
{
GimpVector2 distance_vector;
GimpVector2 tmp_a;
GimpVector2 tmp_b;
gdouble d;
gimp_vector2_sub (&tmp_a, point, point_on_line);
d = gimp_vector2_inner_product (&tmp_a, line_direction);
tmp_b = gimp_vector2_mul_val (*line_direction, d);
*closest_line_point = gimp_vector2_add_val (*point_on_line,
tmp_b);
gimp_vector2_sub (&distance_vector, closest_line_point, point);
return gimp_vector2_length (&distance_vector);
}
/**
* gimp_constrain_line:
* @start_x:
* @start_y:
* @end_x:
* @end_y:
* @n_snap_lines: Number evenly disributed lines to snap to.
*
* Projects a line onto the specified subset of evenly radially
* distributed lines. @n_lines of 2 makes the line snap horizontally
* or vertically. @n_lines of 4 snaps on 45 degree steps. @n_lines of
* 12 on 15 degree steps. etc.
**/
void
gimp_constrain_line (gdouble start_x,
gdouble start_y,
gdouble *end_x,
gdouble *end_y,
gint n_snap_lines)
{
GimpVector2 line_point = { start_x, start_y };
GimpVector2 point = { *end_x, *end_y };
GimpVector2 constrained_point;
GimpVector2 line_dir;
gdouble shortest_dist_moved = G_MAXDOUBLE;
gdouble dist_moved;
gdouble angle;
gint i;
for (i = 0; i < n_snap_lines; i++)
{
angle = i * G_PI / n_snap_lines;
gimp_vector2_set (&line_dir,
cos (angle),
sin (angle));
dist_moved = gimp_utils_point_to_line_distance (&point,
&line_point,
&line_dir,
&constrained_point);
if (dist_moved < shortest_dist_moved)
{
shortest_dist_moved = dist_moved;
*end_x = constrained_point.x;
*end_y = constrained_point.y;
}
}
}
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