/* -*- 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 #include #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); } }