| /* -*- Mode: C; indent-tabs-mode:nil; c-basic-offset: 8-*- */ |
| |
| /* libcroco - Library for parsing and applying CSS |
| * Copyright (C) 2006-2019 Free Software Foundation, Inc. |
| * |
| * This file is not part of the GNU gettext program, but is used with |
| * GNU gettext. |
| * |
| * The original copyright notice is as follows: |
| */ |
| |
| /* |
| * This file is part of The Croco Library |
| * |
| * Copyright (C) 2003-2004 Dodji Seketeli. All Rights Reserved. |
| * |
| * 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 |
| */ |
| |
| #include <config.h> |
| #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 successfull 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 successfull 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 *) str_buf->str; |
| 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 *) str_buf->str; |
| 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 successfull 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 successfull 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); |
| } |
| } |
