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Diffstat (limited to 'src/st/croco/cr-simple-sel.c')
| -rw-r--r-- | src/st/croco/cr-simple-sel.c | 323 |
1 files changed, 323 insertions, 0 deletions
diff --git a/src/st/croco/cr-simple-sel.c b/src/st/croco/cr-simple-sel.c new file mode 100644 index 0000000..bac8621 --- /dev/null +++ b/src/st/croco/cr-simple-sel.c @@ -0,0 +1,323 @@ +/* -*- 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 + * + * Author: Dodji Seketeli + * See COPYRIGHTS file for copyright information. + */ + +#include <string.h> +#include <glib.h> +#include "cr-simple-sel.h" + +/** + * cr_simple_sel_new: + * + *The constructor of #CRSimpleSel. + * + *Returns the new instance of #CRSimpleSel. + */ +CRSimpleSel * +cr_simple_sel_new (void) +{ + CRSimpleSel *result = NULL; + + result = g_try_malloc (sizeof (CRSimpleSel)); + if (!result) { + cr_utils_trace_info ("Out of memory"); + return NULL; + } + memset (result, 0, sizeof (CRSimpleSel)); + + return result; +} + +/** + * cr_simple_sel_append_simple_sel: + * + *Appends a simpe selector to the current list of simple selector. + * + *@a_this: the this pointer of the current instance of #CRSimpleSel. + *@a_sel: the simple selector to append. + * + *Returns: the new list upon successful completion, an error code otherwise. + */ +CRSimpleSel * +cr_simple_sel_append_simple_sel (CRSimpleSel * a_this, CRSimpleSel * a_sel) +{ + CRSimpleSel *cur = NULL; + + g_return_val_if_fail (a_sel, NULL); + + if (a_this == NULL) + return a_sel; + + for (cur = a_this; cur->next; cur = cur->next) ; + + cur->next = a_sel; + a_sel->prev = cur; + + return a_this; +} + +/** + * cr_simple_sel_prepend_simple_sel: + * + *@a_this: the this pointer of the current instance of #CRSimpleSel. + *@a_sel: the simple selector to prepend. + * + *Prepends a simple selector to the current list of simple selectors. + * + *Returns the new list upon successful completion, an error code otherwise. + */ +CRSimpleSel * +cr_simple_sel_prepend_simple_sel (CRSimpleSel * a_this, CRSimpleSel * a_sel) +{ + g_return_val_if_fail (a_sel, NULL); + + if (a_this == NULL) + return a_sel; + + a_sel->next = a_this; + a_this->prev = a_sel; + + return a_sel; +} + +guchar * +cr_simple_sel_to_string (CRSimpleSel const * a_this) +{ + GString *str_buf = NULL; + guchar *result = NULL; + + CRSimpleSel const *cur = 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->name) { + guchar *str = (guchar *) g_strndup (cur->name->stryng->str, + cur->name->stryng->len); + + if (str) { + switch (cur->combinator) { + case COMB_WS: + g_string_append (str_buf, " "); + break; + + case COMB_PLUS: + g_string_append (str_buf, "+"); + break; + + case COMB_GT: + g_string_append (str_buf, ">"); + break; + + default: + break; + } + + g_string_append (str_buf, (const gchar *) str); + g_free (str); + str = NULL; + } + } + + if (cur->add_sel) { + guchar *tmp_str = NULL; + + tmp_str = cr_additional_sel_to_string (cur->add_sel); + if (tmp_str) { + g_string_append (str_buf, (const gchar *) tmp_str); + g_free (tmp_str); + tmp_str = NULL; + } + } + } + + if (str_buf) { + result = (guchar *) g_string_free (str_buf, FALSE); + str_buf = NULL; + } + + return result; +} + + +guchar * +cr_simple_sel_one_to_string (CRSimpleSel const * a_this) +{ + GString *str_buf = NULL; + guchar *result = NULL; + + g_return_val_if_fail (a_this, NULL); + + str_buf = g_string_new (NULL); + if (a_this->name) { + guchar *str = (guchar *) g_strndup (a_this->name->stryng->str, + a_this->name->stryng->len); + + if (str) { + g_string_append_printf (str_buf, "%s", str); + g_free (str); + str = NULL; + } + } + + if (a_this->add_sel) { + guchar *tmp_str = NULL; + + tmp_str = cr_additional_sel_to_string (a_this->add_sel); + if (tmp_str) { + g_string_append_printf + (str_buf, "%s", tmp_str); + g_free (tmp_str); + tmp_str = NULL; + } + } + + if (str_buf) { + result = (guchar *) g_string_free (str_buf, FALSE); + str_buf = NULL; + } + + return result; +} + +/** + * cr_simple_sel_dump: + *@a_this: the current instance of #CRSimpleSel. + *@a_fp: the destination file pointer. + * + *Dumps the selector to a file. + *TODO: add the support of unicode in the dump. + * + *Returns CR_OK upon successful completion, an error code + *otherwise. + */ +enum CRStatus +cr_simple_sel_dump (CRSimpleSel const * a_this, FILE * a_fp) +{ + guchar *tmp_str = NULL; + + g_return_val_if_fail (a_fp, CR_BAD_PARAM_ERROR); + + if (a_this) { + tmp_str = cr_simple_sel_to_string (a_this); + if (tmp_str) { + fprintf (a_fp, "%s", tmp_str); + g_free (tmp_str); + tmp_str = NULL; + } + } + + return CR_OK; +} + +/** + * cr_simple_sel_compute_specificity: + * + *@a_this: the current instance of #CRSimpleSel + * + *Computes the selector (combinator separated list of simple selectors) + *as defined in the css2 spec in chapter 6.4.3 + * + *Returns CR_OK upon successful completion, an error code otherwise. + */ +enum CRStatus +cr_simple_sel_compute_specificity (CRSimpleSel * a_this) +{ + CRAdditionalSel const *cur_add_sel = NULL; + CRSimpleSel const *cur_sel = NULL; + gulong a = 0, + b = 0, + c = 0; + + g_return_val_if_fail (a_this, CR_BAD_PARAM_ERROR); + + for (cur_sel = a_this; cur_sel; cur_sel = cur_sel->next) { + if (cur_sel->type_mask & TYPE_SELECTOR) { + c++; /*hmmh, is this a new language ? */ + } else if (!cur_sel->name + || !cur_sel->name->stryng + || !cur_sel->name->stryng->str) { + if (cur_sel->add_sel->type == + PSEUDO_CLASS_ADD_SELECTOR) { + /* + *this is a pseudo element, and + *the spec says, "ignore pseudo elements". + */ + continue; + } + } + + for (cur_add_sel = cur_sel->add_sel; + cur_add_sel; cur_add_sel = cur_add_sel->next) { + switch (cur_add_sel->type) { + case ID_ADD_SELECTOR: + a++; + break; + + case NO_ADD_SELECTOR: + continue; + + default: + b++; + break; + } + } + } + + /*we suppose a, b and c have 1 to 3 digits */ + a_this->specificity = a * 1000000 + b * 1000 + c; + + return CR_OK; +} + +/** + * cr_simple_sel_destroy: + * + *@a_this: the this pointer of the current instance of #CRSimpleSel. + * + *The destructor of the current instance of + *#CRSimpleSel. + */ +void +cr_simple_sel_destroy (CRSimpleSel * 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->add_sel) { + cr_additional_sel_destroy (a_this->add_sel); + a_this->add_sel = NULL; + } + + if (a_this->next) { + cr_simple_sel_destroy (a_this->next); + } + + if (a_this) { + g_free (a_this); + } +} |