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Diffstat (limited to 'src/3rdparty/libcroco/cr-stylesheet.c')
| -rw-r--r-- | src/3rdparty/libcroco/cr-stylesheet.c | 268 |
1 files changed, 268 insertions, 0 deletions
diff --git a/src/3rdparty/libcroco/cr-stylesheet.c b/src/3rdparty/libcroco/cr-stylesheet.c new file mode 100644 index 0000000..2ea0fa6 --- /dev/null +++ b/src/3rdparty/libcroco/cr-stylesheet.c @@ -0,0 +1,268 @@ +/* -*- Mode: C; indent-tabs-mode: nil; c-basic-offset: 8 -*- */ + +/* + * This file is part of The Croco Library + * + * Copyright (C) 2002-2004 Dodji Seketeli + * + * 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 + */ + +#include "string.h" +#include "cr-stylesheet.h" + +/** + *@file + *The definition of the #CRStyleSheet class + */ + +/** + *Constructor of the #CRStyleSheet class. + *@param the initial list of css statements. + *@return the newly built css2 stylesheet, or NULL in case of error. + */ +CRStyleSheet * +cr_stylesheet_new (CRStatement * a_stmts) +{ + CRStyleSheet *result; + + result = (CRStyleSheet *) g_try_malloc (sizeof (CRStyleSheet)); + if (!result) { + cr_utils_trace_info ("Out of memory"); + return NULL; + } + + memset (result, 0, sizeof (CRStyleSheet)); + + if (a_stmts) + result->statements = a_stmts; + + result->ref_count = 1; + + return result; +} + +/** + *@param a_this the current instance of #CRStyleSheet + *@return the serialized stylesheet. + */ +gchar * +cr_stylesheet_to_string (CRStyleSheet const *a_this) +{ + gchar *str = NULL; + GString *stringue = NULL; + CRStatement const *cur_stmt = NULL; + + g_return_val_if_fail (a_this, NULL); + + stringue = g_string_new (NULL) ; + g_return_val_if_fail (stringue, NULL) ; + + for (cur_stmt = a_this->statements; + cur_stmt; cur_stmt = cur_stmt->next) { + if (cur_stmt->prev) { + g_string_append (stringue, "\n\n") ; + } + str = cr_statement_to_string (cur_stmt, 0) ; + if (str) { + g_string_append (stringue, str) ; + g_free (str) ; + str = NULL ; + } + } + + if (a_this->next) { + str = cr_stylesheet_to_string (a_this->next); + if (str) { + g_string_append (stringue, "\n") ; + g_string_append (stringue, str) ; + g_free (str) ; + str = NULL ; + } + } + + if (stringue) { + str = stringue->str ; + g_string_free (stringue, FALSE) ; + stringue = NULL ; + } + return str ; +} + +/** + *Dumps the current css2 stylesheet to a file. + *@param a_this the current instance of #CRStyleSheet. + *@param a_fp the destination file + */ +void +cr_stylesheet_dump (CRStyleSheet const * a_this, FILE * a_fp) +{ + gchar *str = NULL ; + + g_return_if_fail (a_this); + + str = cr_stylesheet_to_string (a_this) ; + if (str) { + fprintf (a_fp, "%s", str) ; + g_free (str) ; + str = NULL ; + } +} + +/** + *Return the number of rules in the stylesheet. + *@param a_this the current instance of #CRStyleSheet. + *@return number of rules in the stylesheet. + */ +gint +cr_stylesheet_nr_rules (CRStyleSheet const * a_this) +{ + g_return_val_if_fail (a_this, -1); + + return cr_statement_nr_rules (a_this->statements); +} + +/** + *Use an index to get a CRStatement from the rules in a given stylesheet. + *@param a_this the current instance of #CRStatement. + *@param itemnr the index into the rules. + *@return CRStatement at position itemnr, if itemnr > number of rules - 1, + *it will return NULL. + */ +CRStatement * +cr_stylesheet_statement_get_from_list (CRStyleSheet * a_this, int itemnr) +{ + g_return_val_if_fail (a_this, NULL); + + return cr_statement_get_from_list (a_this->statements, itemnr); +} + +/** + *Appends a new stylesheet to the current list of #CRStylesheet, setting + *the "origin" of the new stylesheet to be the same as the others in list. + * + *@param a_this the "this pointer" of the current instance + *of #CRStylesheet . + *@param a_new_stylesheet the stylesheet to append. + *@return the list of stylesheets with the a_new_stylesheet appended to it. + */ +CRStyleSheet * +cr_stylesheet_append_stylesheet (CRStyleSheet * a_this, CRStyleSheet * a_new_stylesheet) +{ + CRStyleSheet *cur = NULL; + + g_return_val_if_fail (a_new_stylesheet, NULL); + + if (a_this == NULL) + return a_new_stylesheet; + + for (cur = a_this; cur->next; cur = cur->next) ; + + cur->next = a_new_stylesheet; + a_new_stylesheet->prev = cur; + + /* The "origin" must apriori be the same for all stylesheets + in a list. We must set it correctly or errors will occur in + put_css_properties_in_props_list(). The "origin" of the initial + stylesheet in the list is set in cr_cascade_set_sheet(). */ + a_new_stylesheet->origin = cur->origin; + + return a_this; +} + +/** + * cr_stylesheet_unlink: + *@a_this: the stylesheet to unlink. + * + *Unlinks the stylesheet from the stylesheet list. + * + *Returns a pointer to the unlinked stylesheet in + *case of a successfull completion, NULL otherwise. + */ +CRStyleSheet * +cr_stylesheet_unlink (CRStyleSheet * a_this) +{ + CRStyleSheet *result = a_this; + + g_return_val_if_fail (result, NULL); + + /* + *some sanity checks first + */ + if (a_this->prev) { + g_return_val_if_fail (a_this->prev->next == a_this, NULL); + + } + if (a_this->next) { + g_return_val_if_fail (a_this->next->prev == a_this, NULL); + } + + /* + *now, the real unlinking job. + */ + if (a_this->prev) { + a_this->prev->next = a_this->next; + } + if (a_this->next) { + a_this->next->prev = a_this->prev; + } + + a_this->next = NULL; + a_this->prev = NULL; + + return a_this; +} + +void +cr_stylesheet_ref (CRStyleSheet * a_this) +{ + g_return_if_fail (a_this); + + a_this->ref_count++; +} + +gboolean +cr_stylesheet_unref (CRStyleSheet * a_this) +{ + g_return_val_if_fail (a_this, FALSE); + + if (!--a_this->ref_count) { + cr_stylesheet_destroy (a_this); + return TRUE; + } + + return FALSE; +} + +/** + *Destructor of the #CRStyleSheet class. + *@param a_this the current instance of the #CRStyleSheet class. + */ +void +cr_stylesheet_destroy (CRStyleSheet * a_this) +{ + g_return_if_fail (a_this); + + if (a_this->statements) { + cr_statement_destroy (a_this->statements); + a_this->statements = NULL; + } + + if (a_this->next) { + cr_stylesheet_destroy (a_this->next); + } + + g_free (a_this); +} |