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PIKApp/app/core/pika-utils.c

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Initial checkin of Pika from heckimp
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
*
* 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 <errno.h>
#include <stdlib.h>
#include <string.h>
#include <locale.h>
#ifdef HAVE__NL_MEASUREMENT_MEASUREMENT
#include <langinfo.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <glib.h>
#ifdef G_OS_WIN32
#define _WIN32_WINNT 0x0500
#include <windows.h>
#include <process.h>
#endif
#include <cairo.h>
#include <gegl.h>
#include <gobject/gvaluecollector.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include "libpikabase/pikabase.h"
#include "libpikamath/pikamath.h"
#include "libpikacolor/pikacolor.h"
#include "core-types.h"
#include "config/pikaxmlparser.h"
#include "pika.h"
#include "pika-utils.h"
#include "pikaasync.h"
#include "pikacontext.h"
#include "pikaerror.h"
#include "pikaimage.h"
#include "pika-intl.h"
#define MAX_FUNC 100
typedef struct
{
GString *text;
gint level;
gboolean numbered_list;
gint list_num;
gboolean unnumbered_list;
const gchar *lang;
GString *original;
gint foreign_level;
gchar **introduction;
GList **release_items;
} ParseState;
static gchar * pika_appstream_parse (const gchar *as_text,
gchar **introduction,
GList **release_items);
static void appstream_text_start_element (GMarkupParseContext *context,
const gchar *element_name,
const gchar **attribute_names,
const gchar **attribute_values,
gpointer user_data,
GError **error);
static void appstream_text_end_element (GMarkupParseContext *context,
const gchar *element_name,
gpointer user_data,
GError **error);
static void appstream_text_characters (GMarkupParseContext *context,
const gchar *text,
gsize text_len,
gpointer user_data,
GError **error);
static const gchar* pika_extension_get_tag_lang (const gchar **attribute_names,
const gchar **attribute_values);
gint
pika_get_pid (void)
{
return (gint) getpid ();
}
guint64
pika_get_physical_memory_size (void)
{
#ifdef G_OS_UNIX
#if defined(HAVE_UNISTD_H) && defined(_SC_PHYS_PAGES) && defined (_SC_PAGE_SIZE)
return (guint64) sysconf (_SC_PHYS_PAGES) * sysconf (_SC_PAGE_SIZE);
#endif
#endif
#ifdef G_OS_WIN32
# if defined(_MSC_VER) && (_MSC_VER <= 1200)
MEMORYSTATUS memory_status;
memory_status.dwLength = sizeof (memory_status);
GlobalMemoryStatus (&memory_status);
return memory_status.dwTotalPhys;
# else
/* requires w2k and newer SDK than provided with msvc6 */
MEMORYSTATUSEX memory_status;
memory_status.dwLength = sizeof (memory_status);
if (GlobalMemoryStatusEx (&memory_status))
return memory_status.ullTotalPhys;
# endif
#endif
return 0;
}
/*
* basically copied from gtk_get_default_language()
*/
gchar *
pika_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 pika_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;
}
PikaUnit
pika_get_default_unit (void)
{
#if defined (HAVE__NL_MEASUREMENT_MEASUREMENT)
const gchar *measurement = nl_langinfo (_NL_MEASUREMENT_MEASUREMENT);
switch (*((guchar *) measurement))
{
case 1: /* metric */
return PIKA_UNIT_MM;
case 2: /* imperial */
return PIKA_UNIT_INCH;
}
#elif defined (G_OS_WIN32)
DWORD measurement;
int ret;
ret = GetLocaleInfoW (LOCALE_USER_DEFAULT,
LOCALE_IMEASURE | LOCALE_RETURN_NUMBER,
(LPWSTR) &measurement,
sizeof (measurement) / sizeof (wchar_t));
if (ret != 0) /* GetLocaleInfo succeeded */
{
switch ((guint) measurement)
{
case 0: /* metric */
return PIKA_UNIT_MM;
case 1: /* imperial */
return PIKA_UNIT_INCH;
}
}
#endif
return PIKA_UNIT_MM;
}
gchar **
pika_properties_append (GType object_type,
gint *n_properties,
gchar **names,
GValue **values,
...)
{
va_list args;
g_return_val_if_fail (g_type_is_a (object_type, G_TYPE_OBJECT), NULL);
g_return_val_if_fail (n_properties != NULL, NULL);
g_return_val_if_fail (names != NULL || *n_properties == 0, NULL);
g_return_val_if_fail (values != NULL || *n_properties == 0, NULL);
va_start (args, values);
names = pika_properties_append_valist (object_type, n_properties,
names, values, args);
va_end (args);
return names;
}
gchar **
pika_properties_append_valist (GType object_type,
gint *n_properties,
gchar **names,
GValue **values,
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_properties != NULL, NULL);
g_return_val_if_fail (names != NULL || *n_properties == 0, NULL);
g_return_val_if_fail (values != NULL || *n_properties == 0, NULL);
object_class = g_type_class_ref (object_type);
param_name = va_arg (args, gchar *);
while (param_name)
{
GValue *value;
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;
}
names = g_renew (gchar *, names, *n_properties + 1);
*values = g_renew (GValue, *values, *n_properties + 1);
value = &((*values)[*n_properties]);
names[*n_properties] = g_strdup (param_name);
value->g_type = 0;
g_value_init (value, G_PARAM_SPEC_VALUE_TYPE (pspec));
G_VALUE_COLLECT (value, args, 0, &error);
if (error)
{
g_warning ("%s: %s", G_STRFUNC, error);
g_free (error);
g_free (names[*n_properties]);
g_value_unset (value);
break;
}
*n_properties = *n_properties + 1;
param_name = va_arg (args, gchar *);
}
g_type_class_unref (object_class);
return names;
}
void
pika_properties_free (gint n_properties,
gchar **names,
GValue *values)
{
g_return_if_fail (names != NULL || n_properties == 0);
g_return_if_fail (values != NULL || n_properties == 0);
if (names && values)
{
gint i;
for (i = 0; i < n_properties; i++)
{
g_free (names[i]);
g_value_unset (&values[i]);
}
g_free (names);
g_free (values);
}
}
/* 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;
}
}
}
pika_assert (to - string->str <= string->len);
if (to - string->str != string->len)
g_string_truncate (string, to - string->str);
return TRUE;
}
gchar *
pika_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);
}
/**
* pika_enum_get_value_name:
* @enum_type: Enum type
* @value: Enum value
*
* Returns the value name for a given value of a given enum
* type. Useful to have inline in PIKA_LOG() messages for example.
*
* Returns: The value name.
**/
const gchar *
pika_enum_get_value_name (GType enum_type,
gint value)
{
const gchar *value_name = NULL;
pika_enum_get_value (enum_type,
value,
&value_name,
NULL /*value_nick*/,
NULL /*value_desc*/,
NULL /*value_help*/);
return value_name;
}
gboolean
pika_get_fill_params (PikaContext *context,
PikaFillType fill_type,
PikaRGB *color,
PikaPattern **pattern,
GError **error)
{
g_return_val_if_fail (PIKA_IS_CONTEXT (context), FALSE);
g_return_val_if_fail (color != NULL, FALSE);
g_return_val_if_fail (pattern != NULL, FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
*pattern = NULL;
switch (fill_type)
{
case PIKA_FILL_FOREGROUND:
pika_context_get_foreground (context, color);
break;
case PIKA_FILL_BACKGROUND:
pika_context_get_background (context, color);
break;
case PIKA_FILL_CIELAB_MIDDLE_GRAY:
{
const float cielab_pixel[3] = {50, 0, 0};
float pixel[3] = {0, 0, 0};
PikaImage *image = pika_context_get_image (context);
PikaImageBaseType base_type;
const Babl *format;
base_type = pika_image_get_base_type (image);
if (base_type == PIKA_INDEXED)
base_type = PIKA_RGB;
format = pika_image_get_format (image, base_type,
PIKA_PRECISION_FLOAT_NON_LINEAR, FALSE,
pika_image_get_layer_space (image));
babl_process (babl_fish (babl_format ("CIE Lab float"), format),
cielab_pixel, pixel, 1);
pika_rgba_set (color, pixel[0], pixel[1], pixel[2], PIKA_OPACITY_OPAQUE);
}
break;
case PIKA_FILL_WHITE:
pika_rgba_set (color, 1.0, 1.0, 1.0, PIKA_OPACITY_OPAQUE);
break;
case PIKA_FILL_TRANSPARENT:
pika_rgba_set (color, 0.0, 0.0, 0.0, PIKA_OPACITY_TRANSPARENT);
break;
case PIKA_FILL_PATTERN:
*pattern = pika_context_get_pattern (context);
if (! *pattern)
{
g_set_error_literal (error, PIKA_ERROR, PIKA_FAILED,
_("No patterns available for this operation."));
/* fall back to BG fill */
pika_context_get_background (context, color);
return FALSE;
}
break;
default:
g_warning ("%s: invalid fill_type %d", G_STRFUNC, fill_type);
return FALSE;
}
return TRUE;
}
/**
* pika_constrain_line:
* @start_x:
* @start_y:
* @end_x:
* @end_y:
* @n_snap_lines: Number evenly disributed lines to snap to.
* @offset_angle: The angle by which to offset the lines, in degrees.
* @xres: The horizontal resolution.
* @yres: The vertical resolution.
*
* 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
pika_constrain_line (gdouble start_x,
gdouble start_y,
gdouble *end_x,
gdouble *end_y,
gint n_snap_lines,
gdouble offset_angle,
gdouble xres,
gdouble yres)
{
PikaVector2 diff;
PikaVector2 dir;
gdouble angle;
offset_angle *= G_PI / 180.0;
diff.x = (*end_x - start_x) / xres;
diff.y = (*end_y - start_y) / yres;
angle = (atan2 (diff.y, diff.x) - offset_angle) * n_snap_lines / G_PI;
angle = RINT (angle) * G_PI / n_snap_lines + offset_angle;
dir.x = cos (angle);
dir.y = sin (angle);
pika_vector2_mul (&dir, pika_vector2_inner_product (&dir, &diff));
*end_x = start_x + dir.x * xres;
*end_y = start_y + dir.y * yres;
}
gint
pika_file_compare (GFile *file1,
GFile *file2)
{
if (g_file_equal (file1, file2))
{
return 0;
}
else
{
gchar *uri1 = g_file_get_uri (file1);
gchar *uri2 = g_file_get_uri (file2);
gint result = strcmp (uri1, uri2);
g_free (uri1);
g_free (uri2);
return result;
}
}
static inline gboolean
is_script (const gchar *filename)
{
#ifdef G_OS_WIN32
/* On Windows there is no concept like the Unix executable flag.
* There is a weak emulation provided by the MS C Runtime using file
* extensions (com, exe, cmd, bat). This needs to be extended to
* treat scripts (Python, Perl, ...) as executables, too. We use the
* PATHEXT variable, which is also used by cmd.exe.
*/
static gchar **exts = NULL;
const gchar *ext = strrchr (filename, '.');
const gchar *pathext;
gint i;
if (exts == NULL)
{
pathext = g_getenv ("PATHEXT");
if (pathext != NULL)
{
exts = g_strsplit (pathext, G_SEARCHPATH_SEPARATOR_S, 100);
}
else
{
exts = g_new (gchar *, 1);
exts[0] = NULL;
}
}
for (i = 0; exts[i]; i++)
{
if (g_ascii_strcasecmp (ext, exts[i]) == 0)
return TRUE;
}
#endif /* G_OS_WIN32 */
return FALSE;
}
gboolean
pika_file_is_executable (GFile *file)
{
GFileInfo *info;
gboolean executable = FALSE;
g_return_val_if_fail (G_IS_FILE (file), FALSE);
info = g_file_query_info (file,
G_FILE_ATTRIBUTE_STANDARD_NAME ","
G_FILE_ATTRIBUTE_STANDARD_TYPE ","
G_FILE_ATTRIBUTE_ACCESS_CAN_EXECUTE ",",
G_FILE_QUERY_INFO_NONE,
NULL, NULL);
if (info)
{
GFileType file_type = g_file_info_get_file_type (info);
const gchar *filename = g_file_info_get_name (info);
if (file_type == G_FILE_TYPE_REGULAR &&
(g_file_info_get_attribute_boolean (info,
G_FILE_ATTRIBUTE_ACCESS_CAN_EXECUTE) ||
is_script (filename)))
{
executable = TRUE;
}
g_object_unref (info);
}
return executable;
}
/**
* pika_file_get_extension:
* @file: A #GFile
*
* Returns @file's extension (including the .), or NULL if there is no
* extension. Note that this function handles compressed files too,
* e.g. for "file.png.gz" it will return ".png.gz".
*
* Returns: The @file's extension. Free with g_free() when no longer needed.
**/
gchar *
pika_file_get_extension (GFile *file)
{
gchar *uri;
gint uri_len;
gchar *ext = NULL;
gint search_len;
g_return_val_if_fail (G_IS_FILE (file), NULL);
uri = g_file_get_uri (file);
uri_len = strlen (uri);
if (g_str_has_suffix (uri, ".gz"))
search_len = uri_len - 3;
else if (g_str_has_suffix (uri, ".bz2"))
search_len = uri_len - 4;
else if (g_str_has_suffix (uri, ".xz"))
search_len = uri_len - 3;
else
search_len = uri_len;
ext = g_strrstr_len (uri, search_len, ".");
if (ext)
ext = g_strdup (ext);
g_free (uri);
return ext;
}
GFile *
pika_file_with_new_extension (GFile *file,
GFile *ext_file)
{
gchar *uri;
gchar *file_ext;
gint file_ext_len = 0;
gchar *ext_file_ext = NULL;
gchar *uri_without_ext;
gchar *new_uri;
GFile *ret;
g_return_val_if_fail (G_IS_FILE (file), NULL);
g_return_val_if_fail (ext_file == NULL || G_IS_FILE (ext_file), NULL);
uri = g_file_get_uri (file);
file_ext = pika_file_get_extension (file);
if (file_ext)
{
file_ext_len = strlen (file_ext);
g_free (file_ext);
}
if (ext_file)
ext_file_ext = pika_file_get_extension (ext_file);
uri_without_ext = g_strndup (uri, strlen (uri) - file_ext_len);
g_free (uri);
new_uri = g_strconcat (uri_without_ext, ext_file_ext, NULL);
ret = g_file_new_for_uri (new_uri);
g_free (ext_file_ext);
g_free (uri_without_ext);
g_free (new_uri);
return ret;
}
/**
* pika_file_delete_recursive:
* @file: #GFile to delete from file system.
* @error:
*
* Delete @file. If file is a directory, it will delete its children as
* well recursively. It will not follow symlinks so you won't end up in
* infinite loops, not will you be at risk of deleting your whole file
* system (unless you pass the root of course!).
* Such function unfortunately does not exist in glib, which only allows
* to delete single files or empty directories by default.
*
* Returns: %TRUE if @file was successfully deleted and all its
* children, %FALSE otherwise with @error filled.
*/
gboolean
pika_file_delete_recursive (GFile *file,
GError **error)
{
gboolean success = TRUE;
if (g_file_query_exists (file, NULL))
{
if (g_file_query_file_type (file, G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
NULL) == G_FILE_TYPE_DIRECTORY)
{
GFileEnumerator *enumerator;
enumerator = g_file_enumerate_children (file,
G_FILE_ATTRIBUTE_STANDARD_NAME ","
G_FILE_ATTRIBUTE_STANDARD_IS_HIDDEN ","
G_FILE_ATTRIBUTE_TIME_MODIFIED,
G_FILE_QUERY_INFO_NONE,
NULL, NULL);
if (enumerator)
{
GFileInfo *info;
while ((info = g_file_enumerator_next_file (enumerator, NULL, NULL)))
{
GFile *child;
child = g_file_enumerator_get_child (enumerator, info);
g_object_unref (info);
if (! pika_file_delete_recursive (child, error))
success = FALSE;
g_object_unref (child);
if (! success)
break;
}
g_object_unref (enumerator);
}
}
if (success)
/* Non-directory or empty directory. */
success = g_file_delete (file, NULL, error);
}
return success;
}
gchar *
pika_data_input_stream_read_line_always (GDataInputStream *stream,
gsize *length,
GCancellable *cancellable,
GError **error)
{
GError *temp_error = NULL;
gchar *result;
g_return_val_if_fail (G_IS_DATA_INPUT_STREAM (stream), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
if (! error)
error = &temp_error;
result = g_data_input_stream_read_line (stream, length, cancellable, error);
if (! result && ! *error)
{
result = g_strdup ("");
if (length) *length = 0;
}
g_clear_error (&temp_error);
return result;
}
gboolean
pika_ascii_strtoi (const gchar *nptr,
gchar **endptr,
gint base,
gint *result)
{
gchar *temp_endptr;
gint64 temp_result;
g_return_val_if_fail (nptr != NULL, FALSE);
g_return_val_if_fail (base == 0 || (base >= 2 && base <= 36), FALSE);
if (! endptr)
endptr = &temp_endptr;
temp_result = g_ascii_strtoll (nptr, endptr, base);
if (*endptr == nptr || errno == ERANGE ||
temp_result < G_MININT || temp_result > G_MAXINT)
{
errno = 0;
return FALSE;
}
if (result) *result = temp_result;
return TRUE;
}
gboolean
pika_ascii_strtod (const gchar *nptr,
gchar **endptr,
gdouble *result)
{
gchar *temp_endptr;
gdouble temp_result;
g_return_val_if_fail (nptr != NULL, FALSE);
if (! endptr)
endptr = &temp_endptr;
temp_result = g_ascii_strtod (nptr, endptr);
if (*endptr == nptr || errno == ERANGE)
{
errno = 0;
return FALSE;
}
if (result) *result = temp_result;
return TRUE;
}
gchar *
pika_appstream_to_pango_markup (const gchar *as_text)
{
return pika_appstream_parse (as_text, NULL, NULL);
}
void
pika_appstream_to_pango_markups (const gchar *as_text,
gchar **introduction,
GList **release_items)
{
gchar * markup;
markup = pika_appstream_parse (as_text, introduction, release_items);
g_free (markup);
}
gint
pika_g_list_compare (GList *list1,
GList *list2)
{
while (list1 && list2)
{
if (list1->data < list2->data)
return -1;
else if (list1->data > list2->data)
return +1;
list1 = g_list_next (list1);
list2 = g_list_next (list2);
}
if (! list1)
return -1;
else if (! list2)
return +1;
return 0;
}
PikaTRCType
pika_suggest_trc_for_component_type (PikaComponentType component_type,
PikaTRCType old_trc)
{
PikaTRCType new_trc = old_trc;
switch (component_type)
{
case PIKA_COMPONENT_TYPE_U8:
/* default to non-linear when converting 8 bit */
new_trc = PIKA_TRC_NON_LINEAR;
break;
case PIKA_COMPONENT_TYPE_U16:
case PIKA_COMPONENT_TYPE_U32:
default:
/* leave TRC alone by default when converting to 16/32 bit int */
break;
case PIKA_COMPONENT_TYPE_HALF:
case PIKA_COMPONENT_TYPE_FLOAT:
case PIKA_COMPONENT_TYPE_DOUBLE:
/* default to linear when converting to floating point */
new_trc = PIKA_TRC_LINEAR;
break;
}
return new_trc;
}
typedef struct
{
gint ref_count;
PikaAsync *async;
gint idle_id;
PikaRunAsyncFunc func;
gpointer user_data;
GDestroyNotify user_data_destroy_func;
} PikaIdleRunAsyncData;
static PikaIdleRunAsyncData *
pika_idle_run_async_data_new (void)
{
PikaIdleRunAsyncData *data;
data = g_slice_new0 (PikaIdleRunAsyncData);
data->ref_count = 1;
return data;
}
static void
pika_idle_run_async_data_inc_ref (PikaIdleRunAsyncData *data)
{
data->ref_count++;
}
static void
pika_idle_run_async_data_dec_ref (PikaIdleRunAsyncData *data)
{
data->ref_count--;
if (data->ref_count == 0)
{
g_signal_handlers_disconnect_by_data (data->async, data);
if (! pika_async_is_stopped (data->async))
pika_async_abort (data->async);
g_object_unref (data->async);
if (data->user_data && data->user_data_destroy_func)
data->user_data_destroy_func (data->user_data);
g_slice_free (PikaIdleRunAsyncData, data);
}
}
static void
pika_idle_run_async_cancel (PikaAsync *async,
PikaIdleRunAsyncData *data)
{
pika_idle_run_async_data_inc_ref (data);
if (data->idle_id)
{
g_source_remove (data->idle_id);
data->idle_id = 0;
}
pika_idle_run_async_data_dec_ref (data);
}
static void
pika_idle_run_async_waiting (PikaAsync *async,
PikaIdleRunAsyncData *data)
{
pika_idle_run_async_data_inc_ref (data);
if (data->idle_id)
{
g_source_remove (data->idle_id);
data->idle_id = 0;
}
g_signal_handlers_block_by_func (data->async,
pika_idle_run_async_cancel,
data);
while (! pika_async_is_stopped (data->async))
data->func (data->async, data->user_data);
g_signal_handlers_unblock_by_func (data->async,
pika_idle_run_async_cancel,
data);
data->user_data = NULL;
pika_idle_run_async_data_dec_ref (data);
}
static gboolean
pika_idle_run_async_idle (PikaIdleRunAsyncData *data)
{
pika_idle_run_async_data_inc_ref (data);
g_signal_handlers_block_by_func (data->async,
pika_idle_run_async_cancel,
data);
data->func (data->async, data->user_data);
g_signal_handlers_unblock_by_func (data->async,
pika_idle_run_async_cancel,
data);
if (pika_async_is_stopped (data->async))
{
data->user_data = NULL;
pika_idle_run_async_data_dec_ref (data);
return G_SOURCE_REMOVE;
}
pika_idle_run_async_data_dec_ref (data);
return G_SOURCE_CONTINUE;
}
PikaAsync *
pika_idle_run_async (PikaRunAsyncFunc func,
gpointer user_data)
{
return pika_idle_run_async_full (G_PRIORITY_DEFAULT_IDLE, func,
user_data, NULL);
}
PikaAsync *
pika_idle_run_async_full (gint priority,
PikaRunAsyncFunc func,
gpointer user_data,
GDestroyNotify user_data_destroy_func)
{
PikaIdleRunAsyncData *data;
g_return_val_if_fail (func != NULL, NULL);
data = pika_idle_run_async_data_new ();
data->func = func;
data->user_data = user_data;
data->user_data_destroy_func = user_data_destroy_func;
data->async = pika_async_new ();
g_signal_connect (data->async, "cancel",
G_CALLBACK (pika_idle_run_async_cancel),
data);
g_signal_connect (data->async, "waiting",
G_CALLBACK (pika_idle_run_async_waiting),
data);
data->idle_id = g_idle_add_full (
priority,
(GSourceFunc) pika_idle_run_async_idle,
data,
(GDestroyNotify) pika_idle_run_async_data_dec_ref);
return g_object_ref (data->async);
}
#ifdef G_OS_WIN32
gboolean
pika_win32_have_wintab (void)
{
gunichar2 wchars_buffer[MAX_PATH + 1];
UINT wchars_count = 0;
memset (wchars_buffer, 0, sizeof (wchars_buffer));
wchars_count = GetSystemDirectoryW (wchars_buffer, MAX_PATH);
if (wchars_count > 0 && wchars_count < MAX_PATH)
{
char *system32_directory = g_utf16_to_utf8 (wchars_buffer, -1, NULL, NULL, NULL);
if (system32_directory)
{
GFile *file = g_file_new_build_filename (system32_directory, "Wintab32.dll", NULL);
gboolean exists = g_file_query_exists (file, NULL);
g_object_unref (file);
g_free (system32_directory);
return exists;
}
}
return FALSE;
}
gboolean
pika_win32_have_windows_ink (void)
{
/* Check for Windows 8 or later */
return g_win32_check_windows_version (6, 2, 0, G_WIN32_OS_ANY);
}
#endif
/* debug stuff */
#include "gegl/pika-babl.h"
#include "pikaimage.h"
#include "pikalayer.h"
#include "pikalayer-new.h"
PikaImage *
pika_create_image_from_buffer (Pika *pika,
GeglBuffer *buffer,
const gchar *image_name)
{
PikaImage *image;
PikaLayer *layer;
const Babl *format;
g_return_val_if_fail (PIKA_IS_PIKA (pika), NULL);
g_return_val_if_fail (GEGL_IS_BUFFER (buffer), NULL);
if (! image_name)
image_name = "Debug Image";
format = gegl_buffer_get_format (buffer);
image = pika_create_image (pika,
gegl_buffer_get_width (buffer),
gegl_buffer_get_height (buffer),
pika_babl_format_get_base_type (format),
pika_babl_format_get_precision (format),
FALSE);
layer = pika_layer_new_from_gegl_buffer (buffer, image, format,
image_name,
PIKA_OPACITY_OPAQUE,
PIKA_LAYER_MODE_NORMAL,
NULL /* same image */);
pika_image_add_layer (image, layer, NULL, -1, FALSE);
pika_create_display (pika, image, PIKA_UNIT_PIXEL, 1.0, NULL);
/* unref the image unconditionally, even when no display was created */
g_object_add_weak_pointer (G_OBJECT (image), (gpointer) &image);
g_object_unref (image);
if (image)
g_object_remove_weak_pointer (G_OBJECT (image), (gpointer) &image);
return image;
}
gint
pika_view_size_get_larger (gint view_size)
{
if (view_size < PIKA_VIEW_SIZE_TINY)
return PIKA_VIEW_SIZE_TINY;
if (view_size < PIKA_VIEW_SIZE_EXTRA_SMALL)
return PIKA_VIEW_SIZE_EXTRA_SMALL;
if (view_size < PIKA_VIEW_SIZE_SMALL)
return PIKA_VIEW_SIZE_SMALL;
if (view_size < PIKA_VIEW_SIZE_MEDIUM)
return PIKA_VIEW_SIZE_MEDIUM;
if (view_size < PIKA_VIEW_SIZE_LARGE)
return PIKA_VIEW_SIZE_LARGE;
if (view_size < PIKA_VIEW_SIZE_EXTRA_LARGE)
return PIKA_VIEW_SIZE_EXTRA_LARGE;
if (view_size < PIKA_VIEW_SIZE_HUGE)
return PIKA_VIEW_SIZE_HUGE;
if (view_size < PIKA_VIEW_SIZE_ENORMOUS)
return PIKA_VIEW_SIZE_ENORMOUS;
return PIKA_VIEW_SIZE_GIGANTIC;
}
gint
pika_view_size_get_smaller (gint view_size)
{
if (view_size > PIKA_VIEW_SIZE_GIGANTIC)
return PIKA_VIEW_SIZE_GIGANTIC;
if (view_size > PIKA_VIEW_SIZE_ENORMOUS)
return PIKA_VIEW_SIZE_ENORMOUS;
if (view_size > PIKA_VIEW_SIZE_HUGE)
return PIKA_VIEW_SIZE_HUGE;
if (view_size > PIKA_VIEW_SIZE_EXTRA_LARGE)
return PIKA_VIEW_SIZE_EXTRA_LARGE;
if (view_size > PIKA_VIEW_SIZE_LARGE)
return PIKA_VIEW_SIZE_LARGE;
if (view_size > PIKA_VIEW_SIZE_MEDIUM)
return PIKA_VIEW_SIZE_MEDIUM;
if (view_size > PIKA_VIEW_SIZE_SMALL)
return PIKA_VIEW_SIZE_SMALL;
if (view_size > PIKA_VIEW_SIZE_EXTRA_SMALL)
return PIKA_VIEW_SIZE_EXTRA_SMALL;
return PIKA_VIEW_SIZE_TINY;
}
/* Private functions */
static gchar *
pika_appstream_parse (const gchar *as_text,
gchar **introduction,
GList **release_items)
{
static const GMarkupParser appstream_text_parser =
{
appstream_text_start_element,
appstream_text_end_element,
appstream_text_characters,
NULL, /* passthrough */
NULL /* error */
};
PikaXmlParser *xml_parser;
gchar *markup = NULL;
GError *error = NULL;
ParseState state;
state.level = 0;
state.foreign_level = -1;
state.text = g_string_new (NULL);
state.list_num = 0;
state.numbered_list = FALSE;
state.unnumbered_list = FALSE;
state.lang = g_getenv ("LANGUAGE");
state.original = NULL;
state.introduction = introduction;
state.release_items = release_items;
xml_parser = pika_xml_parser_new (&appstream_text_parser, &state);
if (as_text &&
! pika_xml_parser_parse_buffer (xml_parser, as_text, -1, &error))
{
g_printerr ("%s: %s\n", G_STRFUNC, error->message);
g_error_free (error);
}
/* Append possibly last original text without proper localization. */
if (state.original)
{
g_string_append (state.text, state.original->str);
g_string_free (state.original, TRUE);
}
if (release_items)
*release_items = g_list_reverse (*release_items);
markup = g_string_free (state.text, FALSE);
pika_xml_parser_free (xml_parser);
return markup;
}
static void
appstream_text_start_element (GMarkupParseContext *context,
const gchar *element_name,
const gchar **attribute_names,
const gchar **attribute_values,
gpointer user_data,
GError **error)
{
ParseState *state = user_data;
GString *output = state->text;
const gchar *tag_lang;
state->level++;
if (state->foreign_level >= 0)
return;
tag_lang = pika_extension_get_tag_lang (attribute_names, attribute_values);
if ((state->lang == NULL && tag_lang == NULL) ||
g_strcmp0 (tag_lang, state->lang) == 0)
{
/* Current tag is our current language. */
if (state->original)
g_string_free (state->original, TRUE);
state->original = NULL;
output = state->text;
}
else if (tag_lang == NULL)
{
/* Current tag is the original language (and we want a
* localization).
*/
if (state->original)
{
g_string_append (state->text, state->original->str);
g_string_free (state->original, TRUE);
}
state->original = g_string_new (NULL);
output = state->original;
}
else
{
/* Current tag is an unrelated language */
state->foreign_level = state->level;
return;
}
if ((state->numbered_list || state->unnumbered_list) &&
(g_strcmp0 (element_name, "ul") == 0 ||
g_strcmp0 (element_name, "ol") == 0))
{
g_set_error (error, PIKA_ERROR, PIKA_FAILED,
_("This parser does not support imbricated lists."));
}
else if (g_strcmp0 (element_name, "ul") == 0)
{
state->unnumbered_list = TRUE;
state->list_num = 0;
}
else if (g_strcmp0 (element_name, "ol") == 0)
{
state->numbered_list = TRUE;
state->list_num = 0;
}
else if (g_strcmp0 (element_name, "li") == 0)
{
state->list_num++;
if (state->numbered_list)
g_string_append_printf (output,
"\n<span weight='ultrabold' >\xe2\x9d\xa8%d\xe2\x9d\xa9</span> ",
state->list_num);
else if (state->unnumbered_list)
g_string_append (output, "\n<span weight='ultrabold' >\xe2\x80\xa2</span> ");
else
g_set_error (error, PIKA_ERROR, PIKA_FAILED,
_("<li> must be inside <ol> or <ul> tags."));
}
else if (g_strcmp0 (element_name, "p") != 0)
{
g_set_error (error, PIKA_ERROR, PIKA_FAILED,
_("Unknown tag <%s>."), element_name);
}
}
static void
appstream_text_end_element (GMarkupParseContext *context,
const gchar *element_name,
gpointer user_data,
GError **error)
{
ParseState *state = user_data;
state->level--;
if (g_strcmp0 (element_name, "p") == 0)
{
if (state->foreign_level < 0)
{
if (state->introduction &&
*state->introduction == NULL)
*state->introduction = g_strdup (state->original ? state->original->str : state->text->str);
if (state->original)
g_string_append (state->original, "\n\n");
else
g_string_append (state->text, "\n\n");
}
}
else if (g_strcmp0 (element_name, "ul") == 0 ||
g_strcmp0 (element_name, "ol") == 0)
{
state->numbered_list = FALSE;
state->unnumbered_list = FALSE;
}
else if (g_strcmp0 (element_name, "li") == 0)
{
if (state->original)
g_string_append (state->original, "\n");
else
g_string_append (state->text, "\n");
}
if (state->foreign_level > state->level)
state->foreign_level = -1;
}
static void
appstream_text_characters (GMarkupParseContext *context,
const gchar *text,
gsize text_len,
gpointer user_data,
GError **error)
{
ParseState *state = user_data;
if (state->foreign_level < 0 && text_len > 0)
{
if (state->list_num > 0 && state->release_items)
{
GList **items = state->release_items;
if (state->list_num == g_list_length (*(state->release_items)))
{
gchar *tmp = (*items)->data;
(*items)->data = g_strconcat (tmp, text, NULL);
g_free (tmp);
}
else
{
*items = g_list_prepend (*items, g_strdup (text));
}
}
if (state->original)
g_string_append (state->original, text);
else
g_string_append (state->text, text);
}
}
static const gchar *
pika_extension_get_tag_lang (const gchar **attribute_names,
const gchar **attribute_values)
{
while (*attribute_names)
{
if (! strcmp (*attribute_names, "xml:lang"))
{
return *attribute_values;
}
attribute_names++;
attribute_values++;
}
return NULL;
}