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gtk2/gtk/gtkcssstylefuncs.c
Javier Jardón 9d0febc9a6 Change FSF Address
2012-02-27 17:06:11 +00:00

1365 lines
36 KiB
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/* GTK - The GIMP Toolkit
* Copyright (C) 2010 Carlos Garnacho <carlosg@gnome.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gtkcssstylefuncsprivate.h"
#include <errno.h>
#include <math.h>
#include <stdlib.h>
#include <string.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <cairo-gobject.h>
#include "gtkanimationdescription.h"
#include "gtkcssimagegradientprivate.h"
#include "gtkcssprovider.h"
#include "gtkcsstypesprivate.h"
#include "gtkgradient.h"
#include "gtkprivatetypebuiltins.h"
#include "gtkshadowprivate.h"
#include "gtkstylecontextprivate.h"
#include "gtksymboliccolorprivate.h"
#include "gtkthemingengine.h"
#include "gtktypebuiltins.h"
#include "gtkwin32themeprivate.h"
/* this is in case round() is not provided by the compiler,
* such as in the case of C89 compilers, like MSVC
*/
#include "fallback-c89.c"
static GHashTable *parse_funcs = NULL;
static GHashTable *print_funcs = NULL;
static GHashTable *compute_funcs = NULL;
typedef gboolean (* GtkStyleParseFunc) (GtkCssParser *parser,
GFile *base,
GValue *value);
typedef void (* GtkStylePrintFunc) (const GValue *value,
GString *string);
typedef void (* GtkStyleComputeFunc) (GValue *computed,
GtkStyleContext *context,
const GValue *specified);
static void
register_conversion_function (GType type,
GtkStyleParseFunc parse,
GtkStylePrintFunc print,
GtkStyleComputeFunc compute)
{
if (parse)
g_hash_table_insert (parse_funcs, GSIZE_TO_POINTER (type), parse);
if (print)
g_hash_table_insert (print_funcs, GSIZE_TO_POINTER (type), print);
if (compute)
g_hash_table_insert (compute_funcs, GSIZE_TO_POINTER (type), compute);
}
static void
string_append_double (GString *string,
double d)
{
char buf[G_ASCII_DTOSTR_BUF_SIZE];
g_ascii_dtostr (buf, sizeof (buf), d);
g_string_append (string, buf);
}
static void
string_append_string (GString *str,
const char *string)
{
gsize len;
g_string_append_c (str, '"');
do {
len = strcspn (string, "\"\n\r\f");
g_string_append (str, string);
string += len;
switch (*string)
{
case '\0':
break;
case '\n':
g_string_append (str, "\\A ");
break;
case '\r':
g_string_append (str, "\\D ");
break;
case '\f':
g_string_append (str, "\\C ");
break;
case '\"':
g_string_append (str, "\\\"");
break;
default:
g_assert_not_reached ();
break;
}
} while (*string);
g_string_append_c (str, '"');
}
/*** IMPLEMENTATIONS ***/
static gboolean
enum_parse (GtkCssParser *parser,
GType type,
int *res)
{
char *str;
if (_gtk_css_parser_try_enum (parser, type, res))
return TRUE;
str = _gtk_css_parser_try_ident (parser, TRUE);
if (str == NULL)
{
_gtk_css_parser_error (parser, "Expected an identifier");
return FALSE;
}
_gtk_css_parser_error (parser,
"Unknown value '%s' for enum type '%s'",
str, g_type_name (type));
g_free (str);
return FALSE;
}
static void
enum_print (int value,
GType type,
GString *string)
{
GEnumClass *enum_class;
GEnumValue *enum_value;
enum_class = g_type_class_ref (type);
enum_value = g_enum_get_value (enum_class, value);
g_string_append (string, enum_value->value_nick);
g_type_class_unref (enum_class);
}
static gboolean
rgba_value_parse (GtkCssParser *parser,
GFile *base,
GValue *value)
{
GtkSymbolicColor *symbolic;
GdkRGBA rgba;
if (_gtk_css_parser_try (parser, "currentcolor", TRUE))
{
symbolic = gtk_symbolic_color_ref (_gtk_symbolic_color_get_current_color ());
}
else
{
symbolic = _gtk_css_parser_read_symbolic_color (parser);
if (symbolic == NULL)
return FALSE;
}
if (gtk_symbolic_color_resolve (symbolic, NULL, &rgba))
{
g_value_set_boxed (value, &rgba);
gtk_symbolic_color_unref (symbolic);
}
else
{
g_value_unset (value);
g_value_init (value, GTK_TYPE_SYMBOLIC_COLOR);
g_value_take_boxed (value, symbolic);
}
return TRUE;
}
static void
rgba_value_print (const GValue *value,
GString *string)
{
const GdkRGBA *rgba = g_value_get_boxed (value);
if (rgba == NULL)
g_string_append (string, "none");
else
{
char *s = gdk_rgba_to_string (rgba);
g_string_append (string, s);
g_free (s);
}
}
static void
rgba_value_compute (GValue *computed,
GtkStyleContext *context,
const GValue *specified)
{
GdkRGBA rgba, white = { 1, 1, 1, 1 };
if (G_VALUE_HOLDS (specified, GTK_TYPE_CSS_SPECIAL_VALUE))
{
}
else if (G_VALUE_HOLDS (specified, GTK_TYPE_SYMBOLIC_COLOR))
{
GtkSymbolicColor *symbolic = g_value_get_boxed (specified);
if (symbolic == _gtk_symbolic_color_get_current_color ())
g_value_copy (_gtk_style_context_peek_property (context, "color"), computed);
else if (_gtk_style_context_resolve_color (context,
symbolic,
&rgba))
g_value_set_boxed (computed, &rgba);
else
g_value_set_boxed (computed, &white);
}
else
g_value_copy (specified, computed);
}
static gboolean
color_value_parse (GtkCssParser *parser,
GFile *base,
GValue *value)
{
GtkSymbolicColor *symbolic;
GdkRGBA rgba;
symbolic = _gtk_css_parser_read_symbolic_color (parser);
if (symbolic == NULL)
return FALSE;
if (gtk_symbolic_color_resolve (symbolic, NULL, &rgba))
{
GdkColor color;
color.red = rgba.red * 65535. + 0.5;
color.green = rgba.green * 65535. + 0.5;
color.blue = rgba.blue * 65535. + 0.5;
g_value_set_boxed (value, &color);
}
else
{
g_value_unset (value);
g_value_init (value, GTK_TYPE_SYMBOLIC_COLOR);
g_value_take_boxed (value, symbolic);
}
return TRUE;
}
static void
color_value_print (const GValue *value,
GString *string)
{
const GdkColor *color = g_value_get_boxed (value);
if (color == NULL)
g_string_append (string, "none");
else
{
char *s = gdk_color_to_string (color);
g_string_append (string, s);
g_free (s);
}
}
static void
color_value_compute (GValue *computed,
GtkStyleContext *context,
const GValue *specified)
{
GdkRGBA rgba;
GdkColor color = { 0, 65535, 65535, 65535 };
if (G_VALUE_HOLDS (specified, GTK_TYPE_SYMBOLIC_COLOR))
{
if (_gtk_style_context_resolve_color (context,
g_value_get_boxed (specified),
&rgba))
{
color.red = rgba.red * 65535. + 0.5;
color.green = rgba.green * 65535. + 0.5;
color.blue = rgba.blue * 65535. + 0.5;
}
g_value_set_boxed (computed, &color);
}
else
g_value_copy (specified, computed);
}
static gboolean
symbolic_color_value_parse (GtkCssParser *parser,
GFile *base,
GValue *value)
{
GtkSymbolicColor *symbolic;
if (_gtk_css_parser_try (parser, "currentcolor", TRUE))
{
symbolic = gtk_symbolic_color_ref (_gtk_symbolic_color_get_current_color ());
}
else
{
symbolic = _gtk_css_parser_read_symbolic_color (parser);
if (symbolic == NULL)
return FALSE;
}
g_value_take_boxed (value, symbolic);
return TRUE;
}
static void
symbolic_color_value_print (const GValue *value,
GString *string)
{
GtkSymbolicColor *symbolic = g_value_get_boxed (value);
if (symbolic == NULL)
g_string_append (string, "none");
else
{
char *s = gtk_symbolic_color_to_string (symbolic);
g_string_append (string, s);
g_free (s);
}
}
static gboolean
font_description_value_parse (GtkCssParser *parser,
GFile *base,
GValue *value)
{
PangoFontDescription *font_desc;
guint mask;
char *str;
str = _gtk_css_parser_read_value (parser);
if (str == NULL)
return FALSE;
font_desc = pango_font_description_from_string (str);
mask = pango_font_description_get_set_fields (font_desc);
/* These values are not really correct,
* but the fields must be set, so we set them to something */
if ((mask & PANGO_FONT_MASK_FAMILY) == 0)
pango_font_description_set_family_static (font_desc, "Sans");
if ((mask & PANGO_FONT_MASK_SIZE) == 0)
pango_font_description_set_size (font_desc, 10 * PANGO_SCALE);
g_free (str);
g_value_take_boxed (value, font_desc);
return TRUE;
}
static void
font_description_value_print (const GValue *value,
GString *string)
{
const PangoFontDescription *desc = g_value_get_boxed (value);
if (desc == NULL)
g_string_append (string, "none");
else
{
char *s = pango_font_description_to_string (desc);
g_string_append (string, s);
g_free (s);
}
}
static gboolean
boolean_value_parse (GtkCssParser *parser,
GFile *base,
GValue *value)
{
if (_gtk_css_parser_try (parser, "true", TRUE) ||
_gtk_css_parser_try (parser, "1", TRUE))
{
g_value_set_boolean (value, TRUE);
return TRUE;
}
else if (_gtk_css_parser_try (parser, "false", TRUE) ||
_gtk_css_parser_try (parser, "0", TRUE))
{
g_value_set_boolean (value, FALSE);
return TRUE;
}
else
{
_gtk_css_parser_error (parser, "Expected a boolean value");
return FALSE;
}
}
static void
boolean_value_print (const GValue *value,
GString *string)
{
if (g_value_get_boolean (value))
g_string_append (string, "true");
else
g_string_append (string, "false");
}
static gboolean
int_value_parse (GtkCssParser *parser,
GFile *base,
GValue *value)
{
gint i;
if (_gtk_css_parser_begins_with (parser, '-'))
{
int res = _gtk_win32_theme_int_parse (parser, base, &i);
if (res >= 0)
{
g_value_set_int (value, i);
return res > 0;
}
/* < 0 => continue */
}
if (!_gtk_css_parser_try_int (parser, &i))
{
_gtk_css_parser_error (parser, "Expected a valid integer value");
return FALSE;
}
g_value_set_int (value, i);
return TRUE;
}
static void
int_value_print (const GValue *value,
GString *string)
{
g_string_append_printf (string, "%d", g_value_get_int (value));
}
static gboolean
uint_value_parse (GtkCssParser *parser,
GFile *base,
GValue *value)
{
guint u;
if (!_gtk_css_parser_try_uint (parser, &u))
{
_gtk_css_parser_error (parser, "Expected a valid unsigned value");
return FALSE;
}
g_value_set_uint (value, u);
return TRUE;
}
static void
uint_value_print (const GValue *value,
GString *string)
{
g_string_append_printf (string, "%u", g_value_get_uint (value));
}
static gboolean
double_value_parse (GtkCssParser *parser,
GFile *base,
GValue *value)
{
gdouble d;
if (!_gtk_css_parser_try_double (parser, &d))
{
_gtk_css_parser_error (parser, "Expected a number");
return FALSE;
}
g_value_set_double (value, d);
return TRUE;
}
static void
double_value_print (const GValue *value,
GString *string)
{
string_append_double (string, g_value_get_double (value));
}
static gboolean
float_value_parse (GtkCssParser *parser,
GFile *base,
GValue *value)
{
gdouble d;
if (!_gtk_css_parser_try_double (parser, &d))
{
_gtk_css_parser_error (parser, "Expected a number");
return FALSE;
}
g_value_set_float (value, d);
return TRUE;
}
static void
float_value_print (const GValue *value,
GString *string)
{
string_append_double (string, g_value_get_float (value));
}
static gboolean
string_value_parse (GtkCssParser *parser,
GFile *base,
GValue *value)
{
char *str = _gtk_css_parser_read_string (parser);
if (str == NULL)
return FALSE;
g_value_take_string (value, str);
return TRUE;
}
static void
string_value_print (const GValue *value,
GString *str)
{
string_append_string (str, g_value_get_string (value));
}
static gboolean
theming_engine_value_parse (GtkCssParser *parser,
GFile *base,
GValue *value)
{
GtkThemingEngine *engine;
char *str;
if (_gtk_css_parser_try (parser, "none", TRUE))
{
g_value_set_object (value, gtk_theming_engine_load (NULL));
return TRUE;
}
str = _gtk_css_parser_try_ident (parser, TRUE);
if (str == NULL)
{
_gtk_css_parser_error (parser, "Expected a valid theme name");
return FALSE;
}
engine = gtk_theming_engine_load (str);
if (engine == NULL)
{
_gtk_css_parser_error (parser, "Theming engine '%s' not found", str);
g_free (str);
return FALSE;
}
g_value_set_object (value, engine);
g_free (str);
return TRUE;
}
static void
theming_engine_value_print (const GValue *value,
GString *string)
{
GtkThemingEngine *engine;
char *name;
engine = g_value_get_object (value);
if (engine == NULL)
g_string_append (string, "none");
else
{
/* XXX: gtk_theming_engine_get_name()? */
g_object_get (engine, "name", &name, NULL);
g_string_append (string, name ? name : "none");
g_free (name);
}
}
static gboolean
animation_description_value_parse (GtkCssParser *parser,
GFile *base,
GValue *value)
{
GtkAnimationDescription *desc;
char *str;
str = _gtk_css_parser_read_value (parser);
if (str == NULL)
return FALSE;
desc = _gtk_animation_description_from_string (str);
g_free (str);
if (desc == NULL)
{
_gtk_css_parser_error (parser, "Invalid animation description");
return FALSE;
}
g_value_take_boxed (value, desc);
return TRUE;
}
static void
animation_description_value_print (const GValue *value,
GString *string)
{
GtkAnimationDescription *desc = g_value_get_boxed (value);
if (desc == NULL)
g_string_append (string, "none");
else
_gtk_animation_description_print (desc, string);
}
static gboolean
border_value_parse (GtkCssParser *parser,
GFile *base,
GValue *value)
{
GtkBorder border = { 0, };
guint i;
int numbers[4];
for (i = 0; i < G_N_ELEMENTS (numbers); i++)
{
if (_gtk_css_parser_begins_with (parser, '-'))
{
/* These are strictly speaking signed, but we want to be able to use them
for unsigned types too, as the actual ranges of values make this safe */
int res = _gtk_win32_theme_int_parse (parser, base, &numbers[i]);
if (res == 0) /* Parse error, report */
return FALSE;
if (res < 0) /* Nothing known to expand */
break;
}
else
{
if (!_gtk_css_parser_try_length (parser, &numbers[i]))
break;
}
}
if (i == 0)
{
_gtk_css_parser_error (parser, "Expected valid border");
return FALSE;
}
border.top = numbers[0];
if (i > 1)
border.right = numbers[1];
else
border.right = border.top;
if (i > 2)
border.bottom = numbers[2];
else
border.bottom = border.top;
if (i > 3)
border.left = numbers[3];
else
border.left = border.right;
g_value_set_boxed (value, &border);
return TRUE;
}
static void
border_value_print (const GValue *value, GString *string)
{
const GtkBorder *border = g_value_get_boxed (value);
if (border == NULL)
g_string_append (string, "none");
else if (border->left != border->right)
g_string_append_printf (string, "%d %d %d %d", border->top, border->right, border->bottom, border->left);
else if (border->top != border->bottom)
g_string_append_printf (string, "%d %d %d", border->top, border->right, border->bottom);
else if (border->top != border->left)
g_string_append_printf (string, "%d %d", border->top, border->right);
else
g_string_append_printf (string, "%d", border->top);
}
static gboolean
gradient_value_parse (GtkCssParser *parser,
GFile *base,
GValue *value)
{
GtkGradient *gradient;
gradient = _gtk_gradient_parse (parser);
if (gradient == NULL)
return FALSE;
g_value_take_boxed (value, gradient);
return TRUE;
}
static void
gradient_value_print (const GValue *value,
GString *string)
{
GtkGradient *gradient = g_value_get_boxed (value);
if (gradient == NULL)
g_string_append (string, "none");
else
{
char *s = gtk_gradient_to_string (gradient);
g_string_append (string, s);
g_free (s);
}
}
static gboolean
pattern_value_parse (GtkCssParser *parser,
GFile *base,
GValue *value)
{
if (_gtk_css_parser_try (parser, "none", TRUE))
{
/* nothing to do here */
}
else if (_gtk_css_parser_begins_with (parser, '-'))
{
g_value_unset (value);
g_value_init (value, GTK_TYPE_GRADIENT);
return gradient_value_parse (parser, base, value);
}
else
{
GError *error = NULL;
gchar *path;
GdkPixbuf *pixbuf;
GFile *file;
cairo_surface_t *surface;
cairo_pattern_t *pattern;
cairo_t *cr;
cairo_matrix_t matrix;
file = _gtk_css_parser_read_url (parser, base);
if (file == NULL)
return FALSE;
path = g_file_get_path (file);
g_object_unref (file);
pixbuf = gdk_pixbuf_new_from_file (path, &error);
g_free (path);
if (pixbuf == NULL)
{
_gtk_css_parser_take_error (parser, error);
return FALSE;
}
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
gdk_pixbuf_get_width (pixbuf),
gdk_pixbuf_get_height (pixbuf));
cr = cairo_create (surface);
gdk_cairo_set_source_pixbuf (cr, pixbuf, 0, 0);
cairo_paint (cr);
pattern = cairo_pattern_create_for_surface (surface);
cairo_matrix_init_scale (&matrix,
gdk_pixbuf_get_width (pixbuf),
gdk_pixbuf_get_height (pixbuf));
cairo_pattern_set_matrix (pattern, &matrix);
cairo_surface_destroy (surface);
cairo_destroy (cr);
g_object_unref (pixbuf);
g_value_take_boxed (value, pattern);
}
return TRUE;
}
static cairo_status_t
surface_write (void *closure,
const unsigned char *data,
unsigned int length)
{
g_byte_array_append (closure, data, length);
return CAIRO_STATUS_SUCCESS;
}
static void
surface_print (cairo_surface_t *surface,
GString * string)
{
#if CAIRO_HAS_PNG_FUNCTIONS
GByteArray *array;
char *base64;
array = g_byte_array_new ();
cairo_surface_write_to_png_stream (surface, surface_write, array);
base64 = g_base64_encode (array->data, array->len);
g_byte_array_free (array, TRUE);
g_string_append (string, "url(\"data:image/png;base64,");
g_string_append (string, base64);
g_string_append (string, "\")");
g_free (base64);
#else
g_string_append (string, "none /* you need cairo png functions enabled to make this work */");
#endif
}
static void
pattern_value_print (const GValue *value,
GString *string)
{
cairo_pattern_t *pattern;
cairo_surface_t *surface;
pattern = g_value_get_boxed (value);
if (pattern == NULL)
{
g_string_append (string, "none");
return;
}
switch (cairo_pattern_get_type (pattern))
{
case CAIRO_PATTERN_TYPE_SURFACE:
if (cairo_pattern_get_surface (pattern, &surface) != CAIRO_STATUS_SUCCESS)
{
g_assert_not_reached ();
}
surface_print (surface, string);
break;
case CAIRO_PATTERN_TYPE_SOLID:
case CAIRO_PATTERN_TYPE_LINEAR:
case CAIRO_PATTERN_TYPE_RADIAL:
default:
g_assert_not_reached ();
break;
}
}
static void
pattern_value_compute (GValue *computed,
GtkStyleContext *context,
const GValue *specified)
{
if (G_VALUE_HOLDS (specified, GTK_TYPE_GRADIENT))
{
cairo_pattern_t *gradient;
gradient = gtk_gradient_resolve_for_context (g_value_get_boxed (specified), context);
g_value_take_boxed (computed, gradient);
}
else
g_value_copy (specified, computed);
}
static gboolean
shadow_value_parse (GtkCssParser *parser,
GFile *base,
GValue *value)
{
gboolean have_inset, have_color, have_lengths;
gdouble hoffset, voffset, blur, spread;
GtkSymbolicColor *color;
GtkShadow *shadow;
guint i;
if (_gtk_css_parser_try (parser, "none", TRUE))
return TRUE;
shadow = _gtk_shadow_new ();
do
{
have_inset = have_lengths = have_color = FALSE;
for (i = 0; i < 3; i++)
{
if (!have_inset &&
_gtk_css_parser_try (parser, "inset", TRUE))
{
have_inset = TRUE;
continue;
}
if (!have_lengths &&
_gtk_css_parser_try_double (parser, &hoffset))
{
have_lengths = TRUE;
if (!_gtk_css_parser_try_double (parser, &voffset))
{
_gtk_css_parser_error (parser, "Horizontal and vertical offsets are required");
_gtk_shadow_unref (shadow);
return FALSE;
}
if (!_gtk_css_parser_try_double (parser, &blur))
blur = 0;
if (!_gtk_css_parser_try_double (parser, &spread))
spread = 0;
continue;
}
if (!have_color)
{
have_color = TRUE;
/* XXX: the color is optional and UA-defined if it's missing,
* but it doesn't really make sense for us...
*/
color = _gtk_css_parser_read_symbolic_color (parser);
if (color == NULL)
{
_gtk_shadow_unref (shadow);
return FALSE;
}
}
}
if (!have_color || !have_lengths)
{
_gtk_css_parser_error (parser, "Must specify at least color and offsets");
_gtk_shadow_unref (shadow);
return FALSE;
}
_gtk_shadow_append (shadow,
hoffset, voffset,
blur, spread,
have_inset, color);
gtk_symbolic_color_unref (color);
}
while (_gtk_css_parser_try (parser, ",", TRUE));
g_value_take_boxed (value, shadow);
return TRUE;
}
static void
shadow_value_print (const GValue *value,
GString *string)
{
GtkShadow *shadow;
shadow = g_value_get_boxed (value);
if (shadow == NULL)
g_string_append (string, "none");
else
_gtk_shadow_print (shadow, string);
}
static void
shadow_value_compute (GValue *computed,
GtkStyleContext *context,
const GValue *specified)
{
GtkShadow *shadow;
shadow = g_value_get_boxed (specified);
if (shadow)
shadow = _gtk_shadow_resolve (shadow, context);
g_value_take_boxed (computed, shadow);
}
static gboolean
border_image_repeat_value_parse (GtkCssParser *parser,
GFile *file,
GValue *value)
{
GtkCssBorderImageRepeat image_repeat;
GtkCssBorderRepeatStyle styles[2];
gint i, v;
for (i = 0; i < 2; i++)
{
if (_gtk_css_parser_try_enum (parser, GTK_TYPE_CSS_BORDER_REPEAT_STYLE, &v))
styles[i] = v;
else if (i == 0)
{
styles[1] = styles[0] = GTK_CSS_REPEAT_STYLE_STRETCH;
break;
}
else
styles[i] = styles[0];
}
image_repeat.hrepeat = styles[0];
image_repeat.vrepeat = styles[1];
g_value_set_boxed (value, &image_repeat);
return TRUE;
}
static void
border_image_repeat_value_print (const GValue *value,
GString *string)
{
GtkCssBorderImageRepeat *image_repeat;
image_repeat = g_value_get_boxed (value);
enum_print (image_repeat->hrepeat, GTK_TYPE_CSS_BORDER_REPEAT_STYLE, string);
if (image_repeat->hrepeat != image_repeat->vrepeat)
{
g_string_append (string, " ");
enum_print (image_repeat->vrepeat, GTK_TYPE_CSS_BORDER_REPEAT_STYLE, string);
}
}
static void
css_number_print (const GValue *value,
GString *string)
{
_gtk_css_number_print (g_value_get_boxed (value), string);
}
static gboolean
enum_value_parse (GtkCssParser *parser,
GFile *base,
GValue *value)
{
int v;
if (enum_parse (parser, G_VALUE_TYPE (value), &v))
{
g_value_set_enum (value, v);
return TRUE;
}
return FALSE;
}
static void
enum_value_print (const GValue *value,
GString *string)
{
enum_print (g_value_get_enum (value), G_VALUE_TYPE (value), string);
}
static gboolean
flags_value_parse (GtkCssParser *parser,
GFile *base,
GValue *value)
{
GFlagsClass *flags_class;
GFlagsValue *flag_value;
guint flags = 0;
char *str;
flags_class = g_type_class_ref (G_VALUE_TYPE (value));
do {
str = _gtk_css_parser_try_ident (parser, TRUE);
if (str == NULL)
{
_gtk_css_parser_error (parser, "Expected an identifier");
g_type_class_unref (flags_class);
return FALSE;
}
flag_value = g_flags_get_value_by_nick (flags_class, str);
if (!flag_value)
{
_gtk_css_parser_error (parser,
"Unknown flag value '%s' for type '%s'",
str, g_type_name (G_VALUE_TYPE (value)));
/* XXX Do we want to return FALSE here? We can get
* forward-compatibility for new values this way
*/
g_free (str);
g_type_class_unref (flags_class);
return FALSE;
}
g_free (str);
}
while (_gtk_css_parser_try (parser, ",", FALSE));
g_type_class_unref (flags_class);
g_value_set_enum (value, flags);
return TRUE;
}
static void
flags_value_print (const GValue *value,
GString *string)
{
GFlagsClass *flags_class;
guint i, flags;
flags_class = g_type_class_ref (G_VALUE_TYPE (value));
flags = g_value_get_flags (value);
for (i = 0; i < flags_class->n_values; i++)
{
GFlagsValue *flags_value = &flags_class->values[i];
if (flags & flags_value->value)
{
if (string->len != 0)
g_string_append (string, ", ");
g_string_append (string, flags_value->value_nick);
}
}
g_type_class_unref (flags_class);
}
/*** API ***/
static void
gtk_css_style_funcs_init (void)
{
if (G_LIKELY (parse_funcs != NULL))
return;
parse_funcs = g_hash_table_new (NULL, NULL);
print_funcs = g_hash_table_new (NULL, NULL);
compute_funcs = g_hash_table_new (NULL, NULL);
register_conversion_function (GDK_TYPE_RGBA,
rgba_value_parse,
rgba_value_print,
rgba_value_compute);
register_conversion_function (GDK_TYPE_COLOR,
color_value_parse,
color_value_print,
color_value_compute);
register_conversion_function (GTK_TYPE_SYMBOLIC_COLOR,
symbolic_color_value_parse,
symbolic_color_value_print,
NULL);
register_conversion_function (PANGO_TYPE_FONT_DESCRIPTION,
font_description_value_parse,
font_description_value_print,
NULL);
register_conversion_function (G_TYPE_BOOLEAN,
boolean_value_parse,
boolean_value_print,
NULL);
register_conversion_function (G_TYPE_INT,
int_value_parse,
int_value_print,
NULL);
register_conversion_function (G_TYPE_UINT,
uint_value_parse,
uint_value_print,
NULL);
register_conversion_function (G_TYPE_DOUBLE,
double_value_parse,
double_value_print,
NULL);
register_conversion_function (G_TYPE_FLOAT,
float_value_parse,
float_value_print,
NULL);
register_conversion_function (G_TYPE_STRING,
string_value_parse,
string_value_print,
NULL);
register_conversion_function (GTK_TYPE_THEMING_ENGINE,
theming_engine_value_parse,
theming_engine_value_print,
NULL);
register_conversion_function (GTK_TYPE_ANIMATION_DESCRIPTION,
animation_description_value_parse,
animation_description_value_print,
NULL);
register_conversion_function (GTK_TYPE_BORDER,
border_value_parse,
border_value_print,
NULL);
register_conversion_function (GTK_TYPE_GRADIENT,
gradient_value_parse,
gradient_value_print,
NULL);
register_conversion_function (CAIRO_GOBJECT_TYPE_PATTERN,
pattern_value_parse,
pattern_value_print,
pattern_value_compute);
register_conversion_function (GTK_TYPE_CSS_BORDER_IMAGE_REPEAT,
border_image_repeat_value_parse,
border_image_repeat_value_print,
NULL);
register_conversion_function (GTK_TYPE_SHADOW,
shadow_value_parse,
shadow_value_print,
shadow_value_compute);
register_conversion_function (GTK_TYPE_CSS_NUMBER,
NULL,
css_number_print,
NULL);
register_conversion_function (G_TYPE_ENUM,
enum_value_parse,
enum_value_print,
NULL);
register_conversion_function (G_TYPE_FLAGS,
flags_value_parse,
flags_value_print,
NULL);
}
/**
* _gtk_css_style_parse_value:
* @value: the value to parse into. Must be a valid initialized #GValue
* @parser: the parser to parse from
* @base: the base URL for @parser
*
* This is the generic parsing function used for CSS values. If the
* function fails to parse a value, it will emit an error on @parser,
* return %FALSE and not touch @value.
*
* Returns: %TRUE if parsing succeeded.
**/
gboolean
_gtk_css_style_parse_value (GValue *value,
GtkCssParser *parser,
GFile *base)
{
GtkStyleParseFunc func;
g_return_val_if_fail (value != NULL, FALSE);
g_return_val_if_fail (parser != NULL, FALSE);
gtk_css_style_funcs_init ();
func = g_hash_table_lookup (parse_funcs,
GSIZE_TO_POINTER (G_VALUE_TYPE (value)));
if (func == NULL)
func = g_hash_table_lookup (parse_funcs,
GSIZE_TO_POINTER (g_type_fundamental (G_VALUE_TYPE (value))));
if (func == NULL)
{
_gtk_css_parser_error (parser,
"Cannot convert to type '%s'",
g_type_name (G_VALUE_TYPE (value)));
return FALSE;
}
return (*func) (parser, base, value);
}
/**
* _gtk_css_style_print_value:
* @value: an initialized GValue returned from _gtk_css_style_parse()
* @string: the string to print into
*
* Prints @value into @string as a CSS value. If @value is not a
* valid value, a random string will be printed instead.
**/
void
_gtk_css_style_print_value (const GValue *value,
GString *string)
{
GtkStylePrintFunc func;
gtk_css_style_funcs_init ();
func = g_hash_table_lookup (print_funcs,
GSIZE_TO_POINTER (G_VALUE_TYPE (value)));
if (func == NULL)
func = g_hash_table_lookup (print_funcs,
GSIZE_TO_POINTER (g_type_fundamental (G_VALUE_TYPE (value))));
if (func == NULL)
{
char *s = g_strdup_value_contents (value);
g_string_append (string, s);
g_free (s);
return;
}
func (value, string);
}
/**
* _gtk_css_style_compute_value:
* @computed: (out): a value to be filled with the result
* @context: the context to use for computing the value
* @specified: the value to use for the computation
*
* Converts the @specified value into the @computed value using the
* information in @context. The values must have matching types, ie
* @specified must be a result of a call to
* _gtk_css_style_parse_value() with the same type as @computed.
**/
void
_gtk_css_style_compute_value (GValue *computed,
GtkStyleContext *context,
const GValue *specified)
{
GtkStyleComputeFunc func;
g_return_if_fail (G_IS_VALUE (computed));
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (G_IS_VALUE (specified));
gtk_css_style_funcs_init ();
func = g_hash_table_lookup (compute_funcs,
GSIZE_TO_POINTER (G_VALUE_TYPE (computed)));
if (func == NULL)
func = g_hash_table_lookup (compute_funcs,
GSIZE_TO_POINTER (g_type_fundamental (G_VALUE_TYPE (computed))));
if (func)
func (computed, context, specified);
else
g_value_copy (specified, computed);
}
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