mirror of https://gitee.com/openkylin/glib2.0.git
266 lines
11 KiB
C
266 lines
11 KiB
C
/* gmarkup.h - Simple XML-like string parser/writer
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*
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* Copyright 2000 Red Hat, Inc.
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __G_MARKUP_H__
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#define __G_MARKUP_H__
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#if !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION)
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#error "Only <glib.h> can be included directly."
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#endif
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#include <stdarg.h>
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#include <glib/gerror.h>
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#include <glib/gslist.h>
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G_BEGIN_DECLS
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/**
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* GMarkupError:
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* @G_MARKUP_ERROR_BAD_UTF8: text being parsed was not valid UTF-8
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* @G_MARKUP_ERROR_EMPTY: document contained nothing, or only whitespace
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* @G_MARKUP_ERROR_PARSE: document was ill-formed
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* @G_MARKUP_ERROR_UNKNOWN_ELEMENT: error should be set by #GMarkupParser
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* functions; element wasn't known
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* @G_MARKUP_ERROR_UNKNOWN_ATTRIBUTE: error should be set by #GMarkupParser
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* functions; attribute wasn't known
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* @G_MARKUP_ERROR_INVALID_CONTENT: error should be set by #GMarkupParser
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* functions; content was invalid
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* @G_MARKUP_ERROR_MISSING_ATTRIBUTE: error should be set by #GMarkupParser
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* functions; a required attribute was missing
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*
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* Error codes returned by markup parsing.
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*/
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typedef enum
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{
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G_MARKUP_ERROR_BAD_UTF8,
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G_MARKUP_ERROR_EMPTY,
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G_MARKUP_ERROR_PARSE,
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/* The following are primarily intended for specific GMarkupParser
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* implementations to set.
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*/
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G_MARKUP_ERROR_UNKNOWN_ELEMENT,
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G_MARKUP_ERROR_UNKNOWN_ATTRIBUTE,
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G_MARKUP_ERROR_INVALID_CONTENT,
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G_MARKUP_ERROR_MISSING_ATTRIBUTE
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} GMarkupError;
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/**
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* G_MARKUP_ERROR:
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*
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* Error domain for markup parsing.
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* Errors in this domain will be from the #GMarkupError enumeration.
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* See #GError for information on error domains.
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*/
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#define G_MARKUP_ERROR g_markup_error_quark ()
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GLIB_AVAILABLE_IN_ALL
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GQuark g_markup_error_quark (void);
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/**
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* GMarkupParseFlags:
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* @G_MARKUP_DEFAULT_FLAGS: No special behaviour. Since: 2.74
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* @G_MARKUP_DO_NOT_USE_THIS_UNSUPPORTED_FLAG: flag you should not use
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* @G_MARKUP_TREAT_CDATA_AS_TEXT: When this flag is set, CDATA marked
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* sections are not passed literally to the @passthrough function of
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* the parser. Instead, the content of the section (without the
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* `<![CDATA[` and `]]>`) is
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* passed to the @text function. This flag was added in GLib 2.12
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* @G_MARKUP_PREFIX_ERROR_POSITION: Normally errors caught by GMarkup
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* itself have line/column information prefixed to them to let the
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* caller know the location of the error. When this flag is set the
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* location information is also prefixed to errors generated by the
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* #GMarkupParser implementation functions
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* @G_MARKUP_IGNORE_QUALIFIED: Ignore (don't report) qualified
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* attributes and tags, along with their contents. A qualified
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* attribute or tag is one that contains ':' in its name (ie: is in
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* another namespace). Since: 2.40.
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*
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* Flags that affect the behaviour of the parser.
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*/
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typedef enum
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{
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G_MARKUP_DEFAULT_FLAGS GLIB_AVAILABLE_ENUMERATOR_IN_2_74 = 0,
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G_MARKUP_DO_NOT_USE_THIS_UNSUPPORTED_FLAG = 1 << 0,
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G_MARKUP_TREAT_CDATA_AS_TEXT = 1 << 1,
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G_MARKUP_PREFIX_ERROR_POSITION = 1 << 2,
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G_MARKUP_IGNORE_QUALIFIED = 1 << 3
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} GMarkupParseFlags;
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/**
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* GMarkupParseContext:
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*
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* A parse context is used to parse a stream of bytes that
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* you expect to contain marked-up text.
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*
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* See g_markup_parse_context_new(), #GMarkupParser, and so
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* on for more details.
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*/
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typedef struct _GMarkupParseContext GMarkupParseContext;
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typedef struct _GMarkupParser GMarkupParser;
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/**
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* GMarkupParser:
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* @start_element: Callback to invoke when the opening tag of an element
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* is seen. The callback's @attribute_names and @attribute_values parameters
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* are %NULL-terminated.
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* @end_element: Callback to invoke when the closing tag of an element
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* is seen. Note that this is also called for empty tags like
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* `<empty/>`.
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* @text: Callback to invoke when some text is seen (text is always
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* inside an element). Note that the text of an element may be spread
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* over multiple calls of this function. If the
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* %G_MARKUP_TREAT_CDATA_AS_TEXT flag is set, this function is also
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* called for the content of CDATA marked sections.
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* @passthrough: Callback to invoke for comments, processing instructions
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* and doctype declarations; if you're re-writing the parsed document,
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* write the passthrough text back out in the same position. If the
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* %G_MARKUP_TREAT_CDATA_AS_TEXT flag is not set, this function is also
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* called for CDATA marked sections.
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* @error: Callback to invoke when an error occurs.
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*
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* Any of the fields in #GMarkupParser can be %NULL, in which case they
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* will be ignored. Except for the @error function, any of these callbacks
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* can set an error; in particular the %G_MARKUP_ERROR_UNKNOWN_ELEMENT,
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* %G_MARKUP_ERROR_UNKNOWN_ATTRIBUTE, and %G_MARKUP_ERROR_INVALID_CONTENT
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* errors are intended to be set from these callbacks. If you set an error
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* from a callback, g_markup_parse_context_parse() will report that error
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* back to its caller.
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*/
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struct _GMarkupParser
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{
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/* Called for open tags <foo bar="baz"> */
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void (*start_element) (GMarkupParseContext *context,
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const gchar *element_name,
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const gchar **attribute_names,
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const gchar **attribute_values,
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gpointer user_data,
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GError **error);
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/* Called for close tags </foo> */
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void (*end_element) (GMarkupParseContext *context,
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const gchar *element_name,
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gpointer user_data,
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GError **error);
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/* Called for character data */
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/* text is not nul-terminated */
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void (*text) (GMarkupParseContext *context,
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const gchar *text,
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gsize text_len,
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gpointer user_data,
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GError **error);
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/* Called for strings that should be re-saved verbatim in this same
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* position, but are not otherwise interpretable. At the moment
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* this includes comments and processing instructions.
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*/
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/* text is not nul-terminated. */
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void (*passthrough) (GMarkupParseContext *context,
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const gchar *passthrough_text,
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gsize text_len,
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gpointer user_data,
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GError **error);
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/* Called on error, including one set by other
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* methods in the vtable. The GError should not be freed.
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*/
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void (*error) (GMarkupParseContext *context,
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GError *error,
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gpointer user_data);
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};
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GLIB_AVAILABLE_IN_ALL
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GMarkupParseContext *g_markup_parse_context_new (const GMarkupParser *parser,
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GMarkupParseFlags flags,
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gpointer user_data,
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GDestroyNotify user_data_dnotify);
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GLIB_AVAILABLE_IN_2_36
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GMarkupParseContext *g_markup_parse_context_ref (GMarkupParseContext *context);
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GLIB_AVAILABLE_IN_2_36
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void g_markup_parse_context_unref (GMarkupParseContext *context);
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GLIB_AVAILABLE_IN_ALL
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void g_markup_parse_context_free (GMarkupParseContext *context);
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GLIB_AVAILABLE_IN_ALL
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gboolean g_markup_parse_context_parse (GMarkupParseContext *context,
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const gchar *text,
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gssize text_len,
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GError **error);
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GLIB_AVAILABLE_IN_ALL
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void g_markup_parse_context_push (GMarkupParseContext *context,
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const GMarkupParser *parser,
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gpointer user_data);
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GLIB_AVAILABLE_IN_ALL
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gpointer g_markup_parse_context_pop (GMarkupParseContext *context);
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GLIB_AVAILABLE_IN_ALL
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gboolean g_markup_parse_context_end_parse (GMarkupParseContext *context,
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GError **error);
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GLIB_AVAILABLE_IN_ALL
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const gchar * g_markup_parse_context_get_element (GMarkupParseContext *context);
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GLIB_AVAILABLE_IN_ALL
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const GSList * g_markup_parse_context_get_element_stack (GMarkupParseContext *context);
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/* For user-constructed error messages, has no precise semantics */
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GLIB_AVAILABLE_IN_ALL
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void g_markup_parse_context_get_position (GMarkupParseContext *context,
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gint *line_number,
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gint *char_number);
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GLIB_AVAILABLE_IN_ALL
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gpointer g_markup_parse_context_get_user_data (GMarkupParseContext *context);
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/* useful when saving */
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GLIB_AVAILABLE_IN_ALL
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gchar* g_markup_escape_text (const gchar *text,
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gssize length);
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GLIB_AVAILABLE_IN_ALL
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gchar *g_markup_printf_escaped (const char *format,
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...) G_GNUC_PRINTF (1, 2);
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GLIB_AVAILABLE_IN_ALL
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gchar *g_markup_vprintf_escaped (const char *format,
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va_list args) G_GNUC_PRINTF(1, 0);
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typedef enum
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{
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G_MARKUP_COLLECT_INVALID,
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G_MARKUP_COLLECT_STRING,
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G_MARKUP_COLLECT_STRDUP,
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G_MARKUP_COLLECT_BOOLEAN,
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G_MARKUP_COLLECT_TRISTATE,
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G_MARKUP_COLLECT_OPTIONAL = (1 << 16)
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} GMarkupCollectType;
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/* useful from start_element */
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GLIB_AVAILABLE_IN_ALL
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gboolean g_markup_collect_attributes (const gchar *element_name,
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const gchar **attribute_names,
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const gchar **attribute_values,
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GError **error,
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GMarkupCollectType first_type,
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const gchar *first_attr,
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...);
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G_END_DECLS
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#endif /* __G_MARKUP_H__ */
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