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-rw-r--r--src/st/croco/cr-simple-sel.c325
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diff --git a/src/st/croco/cr-simple-sel.c b/src/st/croco/cr-simple-sel.c
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+/* -*- 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 *) 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 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);
+ }
+}