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Diffstat (limited to 'src/st/croco/cr-attr-sel.c')
| -rw-r--r-- | src/st/croco/cr-attr-sel.c | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/src/st/croco/cr-attr-sel.c b/src/st/croco/cr-attr-sel.c new file mode 100644 index 0000000..fc8e6ef --- /dev/null +++ b/src/st/croco/cr-attr-sel.c @@ -0,0 +1,234 @@ +/* -*- Mode: C; indent-tabs-mode:nil; c-basic-offset: 8-*- */ + +/* + * This file is part of The Croco Library + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2.1 of the GNU Lesser General Public + * License as published by the Free Software Foundation. + * + * 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 Lesser General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 + * USA + * + * See COPYRIGHTS file for copyrights information. + */ + +#include <stdio.h> +#include "cr-attr-sel.h" + +/** + * CRAttrSel: + * + * #CRAdditionalSel abstracts an attribute selector. + * Attributes selectors are described in the css2 spec [5.8]. + * There are more generally used in the css2 selectors described in + * css2 spec [5] . + */ + +/** + * cr_attr_sel_new: + * The constructor of #CRAttrSel. + * Returns the newly allocated instance + * of #CRAttrSel. + */ +CRAttrSel * +cr_attr_sel_new (void) +{ + CRAttrSel *result = NULL; + + result = g_malloc0 (sizeof (CRAttrSel)); + + return result; +} + +/** + * cr_attr_sel_append_attr_sel: + * @a_this: the this pointer of the current instance of #CRAttrSel. + * @a_attr_sel: selector to append. + * + * Appends an attribute selector to the current list of + * attribute selectors represented by a_this. + * Returns CR_OK upon successful completion, an error code otherwise. + */ +enum CRStatus +cr_attr_sel_append_attr_sel (CRAttrSel * a_this, CRAttrSel * a_attr_sel) +{ + CRAttrSel *cur_sel = NULL; + + g_return_val_if_fail (a_this && a_attr_sel, + CR_BAD_PARAM_ERROR); + + for (cur_sel = a_this; + cur_sel->next; + cur_sel = cur_sel->next) ; + + cur_sel->next = a_attr_sel; + a_attr_sel->prev = cur_sel; + + return CR_OK; +} + +/** + * cr_attr_sel_prepend_attr_sel: + *@a_this: the "this pointer" of the current instance *of #CRAttrSel. + *@a_attr_sel: the attribute selector to append. + * + *Prepends an attribute selector to the list of + *attributes selector represented by a_this. + *Returns CR_OK upon successful completion, an error code otherwise. + */ +enum CRStatus +cr_attr_sel_prepend_attr_sel (CRAttrSel * a_this, + CRAttrSel * a_attr_sel) +{ + g_return_val_if_fail (a_this && a_attr_sel, + CR_BAD_PARAM_ERROR); + + a_attr_sel->next = a_this; + a_this->prev = a_attr_sel; + + return CR_OK; +} + +/** + * cr_attr_sel_to_string: + * @a_this: the current instance of #CRAttrSel. + * + * Serializes an attribute selector into a string + * Returns the serialized attribute selector. + */ +guchar * +cr_attr_sel_to_string (CRAttrSel const * a_this) +{ + CRAttrSel const *cur = NULL; + guchar *result = NULL; + GString *str_buf = NULL; + + g_return_val_if_fail (a_this, NULL); + + str_buf = g_string_new (NULL); + + for (cur = a_this; cur; cur = cur->next) { + if (cur->prev) { + g_string_append_c (str_buf, ' '); + } + + if (cur->name) { + guchar *name = NULL; + + name = (guchar *) g_strndup (cur->name->stryng->str, + cur->name->stryng->len); + if (name) { + g_string_append (str_buf, (const gchar *) name); + g_free (name); + name = NULL; + } + } + + if (cur->value) { + guchar *value = NULL; + + value = (guchar *) g_strndup (cur->value->stryng->str, + cur->value->stryng->len); + if (value) { + switch (cur->match_way) { + case SET: + break; + + case EQUALS: + g_string_append_c (str_buf, '='); + break; + + case INCLUDES: + g_string_append (str_buf, "~="); + break; + + case DASHMATCH: + g_string_append (str_buf, "|="); + break; + + default: + break; + } + + g_string_append_printf + (str_buf, "\"%s\"", value); + + g_free (value); + value = NULL; + } + } + } + + if (str_buf) { + result = (guchar *) g_string_free (str_buf, FALSE); + } + + return result; +} + +/** + * cr_attr_sel_dump: + * @a_this: the "this pointer" of the current instance of + * #CRAttrSel. + * @a_fp: the destination file. + * + * Dumps the current instance of #CRAttrSel to a file. + */ +void +cr_attr_sel_dump (CRAttrSel const * a_this, FILE * a_fp) +{ + guchar *tmp_str = NULL; + + g_return_if_fail (a_this); + + tmp_str = cr_attr_sel_to_string (a_this); + + if (tmp_str) { + fprintf (a_fp, "%s", tmp_str); + g_free (tmp_str); + tmp_str = NULL; + } +} + +/** + *cr_attr_sel_destroy: + *@a_this: the "this pointer" of the current + *instance of #CRAttrSel. + * + *Destroys the current instance of #CRAttrSel. + *Frees all the fields if they are non null. + */ +void +cr_attr_sel_destroy (CRAttrSel * a_this) +{ + g_return_if_fail (a_this); + + if (a_this->name) { + cr_string_destroy (a_this->name); + a_this->name = NULL; + } + + if (a_this->value) { + cr_string_destroy (a_this->value); + a_this->value = NULL; + } + + if (a_this->next) { + cr_attr_sel_destroy (a_this->next); + a_this->next = NULL; + } + + if (a_this) { + g_free (a_this); + a_this = NULL; + } +} + |