cr-simple-sel.c revision f534eb5832f0adc1775a0b23be1de3eb18ca00b6
/* -*- 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 = (CRSimpleSel *) 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. Recursively calls the destructor of #CRSimpleSel->next
*/
void
cr_simple_sel_destroy (CRSimpleSel * const 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);
a_this->next = NULL;
}
g_free (a_this);
}