New function, to get the stack of open elements. (#452887, Ryan Lortie)
[platform/upstream/glib.git] / glib / gmarkup.h
1 /* gmarkup.h - Simple XML-like string parser/writer
2  *
3  *  Copyright 2000 Red Hat, Inc.
4  *
5  * GLib is free software; you can redistribute it and/or modify it
6  * under the terms of the GNU Lesser General Public License as
7  * published by the Free Software Foundation; either version 2 of the
8  * License, or (at your option) any later version.
9  *
10  * GLib is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13  * Lesser General Public License for more details.
14  *
15  * You should have received a copy of the GNU Lesser General Public
16  * License along with GLib; see the file COPYING.LIB.  If not,
17  * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18  *   Boston, MA 02111-1307, USA.
19  */
20
21 #ifndef __G_MARKUP_H__
22 #define __G_MARKUP_H__
23
24 #include <stdarg.h>
25
26 #include <glib/gerror.h>
27
28 G_BEGIN_DECLS
29
30 typedef enum
31 {
32   G_MARKUP_ERROR_BAD_UTF8,
33   G_MARKUP_ERROR_EMPTY,
34   G_MARKUP_ERROR_PARSE,
35   /* These three are primarily intended for specific GMarkupParser
36    * implementations to set.
37    */
38   G_MARKUP_ERROR_UNKNOWN_ELEMENT,
39   G_MARKUP_ERROR_UNKNOWN_ATTRIBUTE,
40   G_MARKUP_ERROR_INVALID_CONTENT
41 } GMarkupError;
42
43 #define G_MARKUP_ERROR g_markup_error_quark ()
44
45 GQuark g_markup_error_quark (void);
46
47 typedef enum
48 {
49   G_MARKUP_DO_NOT_USE_THIS_UNSUPPORTED_FLAG = 1 << 0,
50   G_MARKUP_TREAT_CDATA_AS_TEXT              = 1 << 1  
51 } GMarkupParseFlags;
52
53 typedef struct _GMarkupParseContext GMarkupParseContext;
54 typedef struct _GMarkupParser GMarkupParser;
55
56 struct _GMarkupParser
57 {
58   /* Called for open tags <foo bar="baz"> */
59   void (*start_element)  (GMarkupParseContext *context,
60                           const gchar         *element_name,
61                           const gchar        **attribute_names,
62                           const gchar        **attribute_values,
63                           gpointer             user_data,
64                           GError             **error);
65
66   /* Called for close tags </foo> */
67   void (*end_element)    (GMarkupParseContext *context,
68                           const gchar         *element_name,
69                           gpointer             user_data,
70                           GError             **error);
71
72   /* Called for character data */
73   /* text is not nul-terminated */
74   void (*text)           (GMarkupParseContext *context,
75                           const gchar         *text,
76                           gsize                text_len,  
77                           gpointer             user_data,
78                           GError             **error);
79
80   /* Called for strings that should be re-saved verbatim in this same
81    * position, but are not otherwise interpretable.  At the moment
82    * this includes comments and processing instructions.
83    */
84   /* text is not nul-terminated. */
85   void (*passthrough)    (GMarkupParseContext *context,
86                           const gchar         *passthrough_text,
87                           gsize                text_len,  
88                           gpointer             user_data,
89                           GError             **error);
90
91   /* Called on error, including one set by other
92    * methods in the vtable. The GError should not be freed.
93    */
94   void (*error)          (GMarkupParseContext *context,
95                           GError              *error,
96                           gpointer             user_data);
97 };
98
99 GMarkupParseContext *g_markup_parse_context_new   (const GMarkupParser *parser,
100                                                    GMarkupParseFlags    flags,
101                                                    gpointer             user_data,
102                                                    GDestroyNotify       user_data_dnotify);
103 void                 g_markup_parse_context_free  (GMarkupParseContext *context);
104 gboolean             g_markup_parse_context_parse (GMarkupParseContext *context,
105                                                    const gchar         *text,
106                                                    gssize               text_len,  
107                                                    GError             **error);
108                                                    
109 gboolean             g_markup_parse_context_end_parse (GMarkupParseContext *context,
110                                                        GError             **error);
111 G_CONST_RETURN gchar *g_markup_parse_context_get_element (GMarkupParseContext *context);
112 G_CONST_RETURN GSList *g_markup_parse_context_get_element_stack (GMarkupParseContext *context);
113
114 /* For user-constructed error messages, has no precise semantics */
115 void                 g_markup_parse_context_get_position (GMarkupParseContext *context,
116                                                           gint                *line_number,
117                                                           gint                *char_number);
118
119 /* useful when saving */
120 gchar* g_markup_escape_text (const gchar *text,
121                              gssize       length);  
122
123 gchar *g_markup_printf_escaped (const char *format,
124                                 ...) G_GNUC_PRINTF (1, 2);
125 gchar *g_markup_vprintf_escaped (const char *format,
126                                  va_list     args);
127
128 G_END_DECLS
129
130 #endif /* __G_MARKUP_H__ */
131