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/* vim: set ts=8 sw=8 noexpandtab: */
/* The `C' CSS Library.
* Copyright (C) 2008 Robert Staudinger
*
* 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, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
#include <string.h>
#include <glib.h>
#include "ccss-grammar-priv.h"
#include "ccss-property-impl.h"
#include "config.h"
static GSList *
parse_args_r (GSList *args,
CRTerm const **values)
{
char *val;
char const *unit;
CRTerm const *args_term;
while (*values) {
val = NULL;
switch ((*values)->type) {
case TERM_NUMBER:
switch ((*values)->content.num->type) {
case NUM_GENERIC:
unit = "";
break;
case NUM_LENGTH_PX:
unit = "px";
break;
case NUM_PERCENTAGE:
unit = "%";
break;
default:
g_assert_not_reached ();
unit = "";
}
val = g_strdup_printf ("%f%s", (*values)->content.num->val, unit);
args = g_slist_prepend (args, val);
break;
case TERM_STRING:
case TERM_IDENT:
case TERM_URI:
val = g_strdup_printf ("%s", cr_string_peek_raw_str ((*values)->content.str));
args = g_slist_prepend (args, val);
break;
case TERM_HASH:
val = g_strdup_printf ("#%s", cr_string_peek_raw_str ((*values)->content.str));
args = g_slist_prepend (args, val);
break;
case TERM_FUNCTION:
val = g_strdup_printf ("%s(", cr_string_peek_raw_str ((*values)->content.str));
args = g_slist_prepend (args, val);
args_term = (*values)->ext_content.func_param;
args = parse_args_r (args, &args_term);
val = g_strdup (")");
args = g_slist_prepend (args, val);
break;
case TERM_RGB:
val = g_strdup ("rgb(");
args = g_slist_prepend (args, val);
val = g_strdup_printf ("%f", (*values)->content.rgb->red / 255.);
args = g_slist_prepend (args, val);
val = g_strdup (",");
args = g_slist_prepend (args, val);
val = g_strdup_printf ("%f", (*values)->content.rgb->green / 255.);
args = g_slist_prepend (args, val);
val = g_strdup (",");
args = g_slist_prepend (args, val);
val = g_strdup_printf ("%f", (*values)->content.rgb->blue / 255.);
args = g_slist_prepend (args, val);
val = g_strdup (")");
args = g_slist_prepend (args, val);
break;
case TERM_NO_TYPE:
case TERM_UNICODERANGE:
default:
g_assert_not_reached ();
*values = (*values)->next;
continue;
}
if ((*values)->next) {
val = g_strdup (",");
args = g_slist_prepend (args, val);
}
*values = (*values)->next;
}
return args;
}
/**
* ccss_grammar_invoke_function:
* @self: a #ccss_grammar_t.
* @function_name: name of the function to invoke, e.g. %url.
* @values: arguments passed to the function handler.
* @user_data: user-data passed to the function handler.
* Overrides the user-data assigned in the function handler's definition.
*
* Invoke a registerd function handler. This API is meant to be used by property
* implementations, like when parsing properties like `background-image: url(foo.png)'.
*
* Returns: string value passed back by the ccss API consumer.
**/
char *
ccss_grammar_invoke_function (ccss_grammar_t const *self,
char const *function_name,
CRTerm const *values,
void *user_data)
{
ccss_function_t const *handler;
GSList *args;
void *actual_user_data;
char *ret;
g_return_val_if_fail (self && function_name, NULL);
handler = (ccss_function_t const *)
g_hash_table_lookup (self->functions, function_name);
if (!handler) {
g_warning ("Function `%s' could not be resolved.", function_name);
return NULL;
}
/* parse args */
args = parse_args_r (NULL, &values);
args = g_slist_reverse (args);
/* dispatch */
if (user_data) {
actual_user_data = user_data;
} else {
actual_user_data = handler->user_data;
}
ret = handler->function (args, actual_user_data);
/* free args */
while (args) {
g_free (args->data);
args = g_slist_delete_link (args, args);
}
return ret;
}
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