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gtk2/gtk/gtkbuilderparser.c
Matthias Clasen df455db2e3 GtkBuilder: Make IDs optional 
One requirement of .ui files is that each object must have an ID,
even if it is never referred to or directly loaded from the code.
This makes editing .ui files much more onerous than it has to be,
due to the frequent need to invent new IDs, while avoiding
clashes.

This commit makes IDs optional in the XML. They only need to
be provided for objects which are referred to or explictly loaded
from the code. Since GtkBuilder needs IDs for its own internal
accounting, we create IDs of the form ___object_N___ if not
specified in the XML.

https://bugzilla.gnome.org/show_bug.cgi?id=712553
2013-11-18 06:00:02 -05:00

1328 lines
36 KiB
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/* gtkbuilderparser.c
* Copyright (C) 2006-2007 Async Open Source,
* Johan Dahlin <jdahlin@async.com.br>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <string.h>
#include <gmodule.h>
#include <gio/gio.h>
#include "gtkbuilderprivate.h"
#include "gtkbuilder.h"
#include "gtkbuildable.h"
#include "gtkdebug.h"
#include "gtkversion.h"
#include "gtktypebuiltins.h"
#include "gtkintl.h"
static void free_property_info (PropertyInfo *info);
static void free_object_info (ObjectInfo *info);
static inline void
state_push (ParserData *data, gpointer info)
{
data->stack = g_slist_prepend (data->stack, info);
}
static inline gpointer
state_peek (ParserData *data)
{
if (!data->stack)
return NULL;
return data->stack->data;
}
static inline gpointer
state_pop (ParserData *data)
{
gpointer old = NULL;
if (!data->stack)
return NULL;
old = data->stack->data;
data->stack = g_slist_delete_link (data->stack, data->stack);
return old;
}
#define state_peek_info(data, st) ((st*)state_peek(data))
#define state_pop_info(data, st) ((st*)state_pop(data))
static void
error_missing_attribute (ParserData *data,
const gchar *tag,
const gchar *attribute,
GError **error)
{
gint line_number, char_number;
g_markup_parse_context_get_position (data->ctx,
&line_number,
&char_number);
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_MISSING_ATTRIBUTE,
"%s:%d:%d <%s> requires attribute \"%s\"",
data->filename,
line_number, char_number, tag, attribute);
}
static void
error_invalid_attribute (ParserData *data,
const gchar *tag,
const gchar *attribute,
GError **error)
{
gint line_number, char_number;
g_markup_parse_context_get_position (data->ctx,
&line_number,
&char_number);
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_INVALID_ATTRIBUTE,
"%s:%d:%d '%s' is not a valid attribute of <%s>",
data->filename,
line_number, char_number, attribute, tag);
}
static void
error_invalid_tag (ParserData *data,
const gchar *tag,
const gchar *expected,
GError **error)
{
gint line_number, char_number;
g_markup_parse_context_get_position (data->ctx,
&line_number,
&char_number);
if (expected)
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_INVALID_TAG,
"%s:%d:%d '%s' is not a valid tag here, expected a '%s' tag",
data->filename,
line_number, char_number, tag, expected);
else
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_INVALID_TAG,
"%s:%d:%d '%s' is not a valid tag here",
data->filename,
line_number, char_number, tag);
}
gboolean
_gtk_builder_boolean_from_string (const gchar *string,
gboolean *value,
GError **error)
{
gboolean retval = TRUE;
int length;
g_assert (string != NULL);
length = strlen (string);
if (length == 0)
retval = FALSE;
else if (length == 1)
{
gchar c = g_ascii_tolower (string[0]);
if (c == 'y' || c == 't' || c == '1')
*value = TRUE;
else if (c == 'n' || c == 'f' || c == '0')
*value = FALSE;
else
retval = FALSE;
}
else
{
gchar *lower = g_ascii_strdown (string, length);
if (strcmp (lower, "yes") == 0 || strcmp (lower, "true") == 0)
*value = TRUE;
else if (strcmp (lower, "no") == 0 || strcmp (lower, "false") == 0)
*value = FALSE;
else
retval = FALSE;
g_free (lower);
}
if (!retval)
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_INVALID_VALUE,
"could not parse boolean `%s'",
string);
return retval;
}
static GObject *
builder_construct (ParserData *data,
ObjectInfo *object_info,
GError **error)
{
GObject *object;
g_assert (object_info != NULL);
if (object_info->object && object_info->applied_properties)
return object_info->object;
object_info->properties = g_slist_reverse (object_info->properties);
if (object_info->object == NULL)
{
object = _gtk_builder_construct (data->builder, object_info, error);
if (!object)
return NULL;
}
else
{
/* We're building a template, the object is already set and
* we just want to resolve the properties at the right time
*/
object = object_info->object;
_gtk_builder_apply_properties (data->builder, object_info, error);
}
object_info->applied_properties = TRUE;
g_assert (G_IS_OBJECT (object));
object_info->object = object;
return object;
}
static gchar *
_get_type_by_symbol (const gchar* symbol)
{
static GModule *module = NULL;
GTypeGetFunc func;
GType type;
if (!module)
module = g_module_open (NULL, 0);
if (!g_module_symbol (module, symbol, (gpointer)&func))
return NULL;
type = func ();
if (type == G_TYPE_INVALID)
return NULL;
return g_strdup (g_type_name (type));
}
static void
parse_requires (ParserData *data,
const gchar *element_name,
const gchar **names,
const gchar **values,
GError **error)
{
RequiresInfo *req_info;
const gchar *library = NULL;
const gchar *version = NULL;
gchar **split;
gint i, version_major = 0, version_minor = 0;
gint line_number, char_number;
g_markup_parse_context_get_position (data->ctx,
&line_number,
&char_number);
for (i = 0; names[i] != NULL; i++)
{
if (strcmp (names[i], "lib") == 0)
library = values[i];
else if (strcmp (names[i], "version") == 0)
version = values[i];
else
error_invalid_attribute (data, element_name, names[i], error);
}
if (!library || !version)
{
error_missing_attribute (data, element_name,
version ? "lib" : "version", error);
return;
}
if (!(split = g_strsplit (version, ".", 2)) || !split[0] || !split[1])
{
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_INVALID_VALUE,
"%s:%d:%d <%s> attribute has malformed value \"%s\"",
data->filename,
line_number, char_number, "version", version);
return;
}
version_major = g_ascii_strtoll (split[0], NULL, 10);
version_minor = g_ascii_strtoll (split[1], NULL, 10);
g_strfreev (split);
req_info = g_slice_new0 (RequiresInfo);
req_info->library = g_strdup (library);
req_info->major = version_major;
req_info->minor = version_minor;
state_push (data, req_info);
req_info->tag.name = element_name;
}
static gboolean
is_requested_object (const gchar *object,
ParserData *data)
{
GSList *l;
for (l = data->requested_objects; l; l = l->next)
{
if (g_strcmp0 (l->data, object) == 0)
return TRUE;
}
return FALSE;
}
static void
parse_object (GMarkupParseContext *context,
ParserData *data,
const gchar *element_name,
const gchar **names,
const gchar **values,
GError **error)
{
ObjectInfo *object_info;
ChildInfo* child_info;
int i;
gchar *object_class = NULL;
gchar *object_id = NULL;
gchar *constructor = NULL;
gint line, line2;
child_info = state_peek_info (data, ChildInfo);
if (child_info && strcmp (child_info->tag.name, "object") == 0)
{
error_invalid_tag (data, element_name, NULL, error);
return;
}
for (i = 0; names[i] != NULL; i++)
{
if (strcmp (names[i], "class") == 0)
object_class = g_strdup (values[i]);
else if (strcmp (names[i], "id") == 0)
object_id = g_strdup (values[i]);
else if (strcmp (names[i], "constructor") == 0)
constructor = g_strdup (values[i]);
else if (strcmp (names[i], "type-func") == 0)
{
/* Call the GType function, and return the name of the GType,
* it's guaranteed afterwards that g_type_from_name on the name
* will return our GType
*/
object_class = _get_type_by_symbol (values[i]);
if (!object_class)
{
g_markup_parse_context_get_position (context, &line, NULL);
g_set_error (error, GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_INVALID_TYPE_FUNCTION,
_("Invalid type function on line %d: '%s'"),
line, values[i]);
return;
}
}
else
{
error_invalid_attribute (data, element_name, names[i], error);
return;
}
}
if (!object_class)
{
error_missing_attribute (data, element_name, "class", error);
return;
}
data->object_counter++;
if (!object_id)
{
object_id = g_strdup_printf ("___object_%d___", data->object_counter++);
}
++data->cur_object_level;
/* check if we reached a requested object (if it is specified) */
if (data->requested_objects && !data->inside_requested_object)
{
if (is_requested_object (object_id, data))
{
data->requested_object_level = data->cur_object_level;
GTK_NOTE (BUILDER, g_print ("requested object \"%s\" found at level %d\n",
object_id,
data->requested_object_level));
data->inside_requested_object = TRUE;
}
else
{
g_free (object_class);
g_free (object_id);
g_free (constructor);
return;
}
}
object_info = g_slice_new0 (ObjectInfo);
object_info->class_name = object_class;
object_info->id = object_id;
object_info->constructor = constructor;
state_push (data, object_info);
object_info->tag.name = element_name;
if (child_info)
object_info->parent = (CommonInfo*)child_info;
g_markup_parse_context_get_position (context, &line, NULL);
line2 = GPOINTER_TO_INT (g_hash_table_lookup (data->object_ids, object_id));
if (line2 != 0)
{
g_set_error (error, GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_DUPLICATE_ID,
_("Duplicate object ID '%s' on line %d (previously on line %d)"),
object_id, line, line2);
return;
}
g_hash_table_insert (data->object_ids, g_strdup (object_id), GINT_TO_POINTER (line));
}
static void
parse_template (GMarkupParseContext *context,
ParserData *data,
const gchar *element_name,
const gchar **names,
const gchar **values,
GError **error)
{
ObjectInfo *object_info;
int i;
gchar *object_class = NULL;
gint line, line2;
GType template_type = _gtk_builder_get_template_type (data->builder);
GType parsed_type;
if (template_type == 0)
{
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_UNHANDLED_TAG,
"Encountered template definition but not parsing a template.");
return;
}
else if (state_peek (data) != NULL)
{
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_UNHANDLED_TAG,
"Encountered template definition that is not at the top level.");
return;
}
for (i = 0; names[i] != NULL; i++)
{
if (strcmp (names[i], "class") == 0)
object_class = g_strdup (values[i]);
else if (strcmp (names[i], "parent") == 0)
/* Ignore 'parent' attribute, however it's needed by Glade */;
else
{
error_invalid_attribute (data, element_name, names[i], error);
return;
}
}
if (!object_class)
{
error_missing_attribute (data, element_name, "class", error);
return;
}
parsed_type = g_type_from_name (object_class);
if (template_type != parsed_type)
{
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_TEMPLATE_MISMATCH,
"Parsed template definition for type `%s', expected type `%s'.",
object_class, g_type_name (template_type));
return;
}
++data->cur_object_level;
object_info = g_slice_new0 (ObjectInfo);
object_info->class_name = object_class;
object_info->id = g_strdup (object_class);
object_info->object = gtk_builder_get_object (data->builder, object_class);
state_push (data, object_info);
object_info->tag.name = element_name;
g_markup_parse_context_get_position (context, &line, NULL);
line2 = GPOINTER_TO_INT (g_hash_table_lookup (data->object_ids, object_class));
if (line2 != 0)
{
g_set_error (error, GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_DUPLICATE_ID,
_("Duplicate object ID '%s' on line %d (previously on line %d)"),
object_class, line, line2);
return;
}
g_hash_table_insert (data->object_ids, g_strdup (object_class), GINT_TO_POINTER (line));
}
static void
free_object_info (ObjectInfo *info)
{
/* Do not free the signal items, which GtkBuilder takes ownership of */
g_slist_free (info->signals);
g_slist_foreach (info->properties,
(GFunc)free_property_info, NULL);
g_slist_free (info->properties);
g_free (info->constructor);
g_free (info->class_name);
g_free (info->id);
g_slice_free (ObjectInfo, info);
}
static void
free_menu_info (MenuInfo *info)
{
g_free (info->id);
g_hash_table_unref (info->objects);
g_slice_free (MenuInfo, info);
}
static void
parse_child (ParserData *data,
const gchar *element_name,
const gchar **names,
const gchar **values,
GError **error)
{
ObjectInfo* object_info;
ChildInfo *child_info;
guint i;
object_info = state_peek_info (data, ObjectInfo);
if (!object_info ||
!(strcmp (object_info->tag.name, "object") == 0 ||
strcmp (object_info->tag.name, "template") == 0))
{
error_invalid_tag (data, element_name, NULL, error);
return;
}
child_info = g_slice_new0 (ChildInfo);
state_push (data, child_info);
child_info->tag.name = element_name;
for (i = 0; names[i]; i++)
{
if (strcmp (names[i], "type") == 0)
child_info->type = g_strdup (values[i]);
else if (strcmp (names[i], "internal-child") == 0)
child_info->internal_child = g_strdup (values[i]);
else
error_invalid_attribute (data, element_name, names[i], error);
}
child_info->parent = (CommonInfo*)object_info;
object_info->object = builder_construct (data, object_info, error);
}
static void
free_child_info (ChildInfo *info)
{
g_free (info->type);
g_free (info->internal_child);
g_slice_free (ChildInfo, info);
}
static void
parse_property (ParserData *data,
const gchar *element_name,
const gchar **names,
const gchar **values,
GError **error)
{
PropertyInfo *info;
gchar *name = NULL;
gchar *context = NULL;
gboolean translatable = FALSE;
ObjectInfo *object_info;
int i;
object_info = state_peek_info (data, ObjectInfo);
if (!object_info ||
!(strcmp (object_info->tag.name, "object") == 0 ||
strcmp (object_info->tag.name, "template") == 0))
{
error_invalid_tag (data, element_name, NULL, error);
return;
}
for (i = 0; names[i] != NULL; i++)
{
if (strcmp (names[i], "name") == 0)
name = g_strdelimit (g_strdup (values[i]), "_", '-');
else if (strcmp (names[i], "translatable") == 0)
{
if (!_gtk_builder_boolean_from_string (values[i], &translatable,
error))
return;
}
else if (strcmp (names[i], "comments") == 0)
{
/* do nothing, comments are for translators */
}
else if (strcmp (names[i], "context") == 0)
{
context = g_strdup (values[i]);
}
else
{
error_invalid_attribute (data, element_name, names[i], error);
return;
}
}
if (!name)
{
error_missing_attribute (data, element_name, "name", error);
return;
}
info = g_slice_new0 (PropertyInfo);
info->name = name;
info->translatable = translatable;
info->context = context;
info->text = g_string_new ("");
state_push (data, info);
info->tag.name = element_name;
}
static void
free_property_info (PropertyInfo *info)
{
g_free (info->data);
g_free (info->name);
g_slice_free (PropertyInfo, info);
}
static void
parse_signal (ParserData *data,
const gchar *element_name,
const gchar **names,
const gchar **values,
GError **error)
{
SignalInfo *info;
gchar *name = NULL;
gchar *handler = NULL;
gchar *object = NULL;
gboolean after = FALSE;
gboolean swapped = FALSE;
gboolean swapped_set = FALSE;
ObjectInfo *object_info;
int i;
object_info = state_peek_info (data, ObjectInfo);
if (!object_info ||
!(strcmp (object_info->tag.name, "object") == 0 ||
strcmp (object_info->tag.name, "template") == 0))
{
error_invalid_tag (data, element_name, NULL, error);
return;
}
for (i = 0; names[i] != NULL; i++)
{
if (strcmp (names[i], "name") == 0)
name = g_strdup (values[i]);
else if (strcmp (names[i], "handler") == 0)
handler = g_strdup (values[i]);
else if (strcmp (names[i], "after") == 0)
{
if (!_gtk_builder_boolean_from_string (values[i], &after, error))
return;
}
else if (strcmp (names[i], "swapped") == 0)
{
if (!_gtk_builder_boolean_from_string (values[i], &swapped, error))
return;
swapped_set = TRUE;
}
else if (strcmp (names[i], "object") == 0)
object = g_strdup (values[i]);
else if (strcmp (names[i], "last_modification_time") == 0)
/* parse but ignore */
;
else
{
error_invalid_attribute (data, element_name, names[i], error);
return;
}
}
if (!name)
{
error_missing_attribute (data, element_name, "name", error);
return;
}
else if (!handler)
{
error_missing_attribute (data, element_name, "handler", error);
return;
}
/* Swapped defaults to FALSE except when object is set */
if (object && !swapped_set)
swapped = TRUE;
info = g_slice_new0 (SignalInfo);
info->name = name;
info->handler = handler;
if (after)
info->flags |= G_CONNECT_AFTER;
if (swapped)
info->flags |= G_CONNECT_SWAPPED;
info->connect_object_name = object;
state_push (data, info);
info->tag.name = element_name;
}
/* Called by GtkBuilder */
void
_free_signal_info (SignalInfo *info,
gpointer user_data)
{
g_free (info->name);
g_free (info->handler);
g_free (info->connect_object_name);
g_free (info->object_name);
g_slice_free (SignalInfo, info);
}
static void
free_requires_info (RequiresInfo *info,
gpointer user_data)
{
g_free (info->library);
g_slice_free (RequiresInfo, info);
}
static void
parse_interface (ParserData *data,
const gchar *element_name,
const gchar **names,
const gchar **values,
GError **error)
{
int i;
for (i = 0; names[i] != NULL; i++)
{
if (strcmp (names[i], "domain") == 0)
{
if (data->domain)
{
if (strcmp (data->domain, values[i]) == 0)
continue;
else
g_warning ("%s: interface domain '%s' overrides "
"programically set domain '%s'",
data->filename,
values[i],
data->domain
);
g_free (data->domain);
}
data->domain = g_strdup (values[i]);
gtk_builder_set_translation_domain (data->builder, data->domain);
}
else
error_invalid_attribute (data, "interface", names[i], error);
}
}
static SubParser *
create_subparser (GObject *object,
GObject *child,
const gchar *element_name,
GMarkupParser *parser,
gpointer user_data)
{
SubParser *subparser;
subparser = g_slice_new0 (SubParser);
subparser->object = object;
subparser->child = child;
subparser->tagname = g_strdup (element_name);
subparser->start = element_name;
subparser->parser = g_memdup (parser, sizeof (GMarkupParser));
subparser->data = user_data;
return subparser;
}
static void
free_subparser (SubParser *subparser)
{
g_free (subparser->tagname);
g_slice_free (SubParser, subparser);
}
static gboolean
subparser_start (GMarkupParseContext *context,
const gchar *element_name,
const gchar **names,
const gchar **values,
ParserData *data,
GError **error)
{
SubParser *subparser = data->subparser;
if (!subparser->start &&
strcmp (element_name, subparser->tagname) == 0)
subparser->start = element_name;
if (subparser->start)
{
if (subparser->parser->start_element)
subparser->parser->start_element (context,
element_name, names, values,
subparser->data, error);
return FALSE;
}
return TRUE;
}
static void
subparser_end (GMarkupParseContext *context,
const gchar *element_name,
ParserData *data,
GError **error)
{
if (data->subparser->parser->end_element)
data->subparser->parser->end_element (context, element_name,
data->subparser->data, error);
if (!strcmp (data->subparser->start, element_name) == 0)
return;
gtk_buildable_custom_tag_end (GTK_BUILDABLE (data->subparser->object),
data->builder,
data->subparser->child,
element_name,
data->subparser->data);
g_free (data->subparser->parser);
if (GTK_BUILDABLE_GET_IFACE (data->subparser->object)->custom_finished)
data->custom_finalizers = g_slist_prepend (data->custom_finalizers,
data->subparser);
else
free_subparser (data->subparser);
data->subparser = NULL;
}
static gboolean
parse_custom (GMarkupParseContext *context,
const gchar *element_name,
const gchar **names,
const gchar **values,
ParserData *data,
GError **error)
{
CommonInfo* parent_info;
GMarkupParser parser;
gpointer subparser_data;
GObject *object;
GObject *child;
parent_info = state_peek_info (data, CommonInfo);
if (!parent_info)
return FALSE;
if (strcmp (parent_info->tag.name, "object") == 0 ||
strcmp (parent_info->tag.name, "template") == 0)
{
ObjectInfo* object_info = (ObjectInfo*)parent_info;
if (!object_info->object)
{
object_info->properties = g_slist_reverse (object_info->properties);
object_info->object = _gtk_builder_construct (data->builder,
object_info,
error);
if (!object_info->object)
return TRUE; /* A GError is already set */
}
g_assert (object_info->object);
object = object_info->object;
child = NULL;
}
else if (strcmp (parent_info->tag.name, "child") == 0)
{
ChildInfo* child_info = (ChildInfo*)parent_info;
_gtk_builder_add (data->builder, child_info);
object = ((ObjectInfo*)child_info->parent)->object;
child = child_info->object;
}
else
return FALSE;
if (!gtk_buildable_custom_tag_start (GTK_BUILDABLE (object),
data->builder,
child,
element_name,
&parser,
&subparser_data))
return FALSE;
data->subparser = create_subparser (object, child, element_name,
&parser, subparser_data);
if (parser.start_element)
parser.start_element (context,
element_name, names, values,
subparser_data, error);
return TRUE;
}
static void
start_element (GMarkupParseContext *context,
const gchar *element_name,
const gchar **names,
const gchar **values,
gpointer user_data,
GError **error)
{
ParserData *data = (ParserData*)user_data;
#ifdef GTK_ENABLE_DEBUG
if (gtk_get_debug_flags () & GTK_DEBUG_BUILDER)
{
GString *tags = g_string_new ("");
int i;
for (i = 0; names[i]; i++)
g_string_append_printf (tags, "%s=\"%s\" ", names[i], values[i]);
if (i)
{
g_string_insert_c (tags, 0, ' ');
g_string_truncate (tags, tags->len - 1);
}
g_print ("<%s%s>\n", element_name, tags->str);
g_string_free (tags, TRUE);
}
#endif
if (!data->last_element && strcmp (element_name, "interface") != 0)
{
g_set_error (error, GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_UNHANDLED_TAG,
_("Invalid root element: '%s'"),
element_name);
return;
}
data->last_element = element_name;
if (data->subparser)
if (!subparser_start (context, element_name, names, values,
data, error))
return;
if (strcmp (element_name, "requires") == 0)
parse_requires (data, element_name, names, values, error);
else if (strcmp (element_name, "object") == 0)
parse_object (context, data, element_name, names, values, error);
else if (strcmp (element_name, "template") == 0)
parse_template (context, data, element_name, names, values, error);
else if (data->requested_objects && !data->inside_requested_object)
{
/* If outside a requested object, simply ignore this tag */
return;
}
else if (strcmp (element_name, "child") == 0)
parse_child (data, element_name, names, values, error);
else if (strcmp (element_name, "property") == 0)
parse_property (data, element_name, names, values, error);
else if (strcmp (element_name, "signal") == 0)
parse_signal (data, element_name, names, values, error);
else if (strcmp (element_name, "interface") == 0)
parse_interface (data, element_name, names, values, error);
else if (strcmp (element_name, "menu") == 0)
_gtk_builder_menu_start (data, element_name, names, values, error);
else if (strcmp (element_name, "placeholder") == 0)
{
/* placeholder has no special treatmeant, but it needs an
* if clause to avoid an error below.
*/
}
else
if (!parse_custom (context, element_name, names, values,
data, error))
g_set_error (error, GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_UNHANDLED_TAG,
_("Unhandled tag: '%s'"),
element_name);
}
const gchar *
_gtk_builder_parser_translate (const gchar *domain,
const gchar *context,
const gchar *text)
{
const gchar *s;
if (context)
s = g_dpgettext2 (domain, context, text);
else
s = g_dgettext (domain, text);
return s;
}
/* Called for close tags </foo> */
static void
end_element (GMarkupParseContext *context,
const gchar *element_name,
gpointer user_data,
GError **error)
{
ParserData *data = (ParserData*)user_data;
GTK_NOTE (BUILDER, g_print ("</%s>\n", element_name));
if (data->subparser && data->subparser->start)
{
subparser_end (context, element_name, data, error);
return;
}
if (strcmp (element_name, "requires") == 0)
{
RequiresInfo *req_info = state_pop_info (data, RequiresInfo);
/* TODO: Allow third party widget developers to check thier
* required versions, possibly throw a signal allowing them
* to check thier library versions here.
*/
if (!strcmp (req_info->library, "gtk+"))
{
if (!GTK_CHECK_VERSION (req_info->major, req_info->minor, 0))
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_VERSION_MISMATCH,
"%s: required %s version %d.%d, current version is %d.%d",
data->filename, req_info->library,
req_info->major, req_info->minor,
GTK_MAJOR_VERSION, GTK_MINOR_VERSION);
}
free_requires_info (req_info, NULL);
}
else if (strcmp (element_name, "interface") == 0)
{
}
else if (data->requested_objects && !data->inside_requested_object)
{
/* If outside a requested object, simply ignore this tag */
return;
}
else if (strcmp (element_name, "menu") == 0)
{
_gtk_builder_menu_end (data);
}
else if (strcmp (element_name, "object") == 0 ||
strcmp (element_name, "template") == 0)
{
ObjectInfo *object_info = state_pop_info (data, ObjectInfo);
ChildInfo* child_info = state_peek_info (data, ChildInfo);
if (data->requested_objects && data->inside_requested_object &&
(data->cur_object_level == data->requested_object_level))
{
GTK_NOTE (BUILDER, g_print ("requested object end found at level %d\n",
data->requested_object_level));
data->inside_requested_object = FALSE;
}
--data->cur_object_level;
g_assert (data->cur_object_level >= 0);
object_info->object = builder_construct (data, object_info, error);
if (!object_info->object)
{
free_object_info (object_info);
return;
}
if (child_info)
child_info->object = object_info->object;
if (GTK_IS_BUILDABLE (object_info->object) &&
GTK_BUILDABLE_GET_IFACE (object_info->object)->parser_finished)
data->finalizers = g_slist_prepend (data->finalizers, object_info->object);
_gtk_builder_add_signals (data->builder, object_info->signals);
free_object_info (object_info);
}
else if (strcmp (element_name, "property") == 0)
{
PropertyInfo *prop_info = state_pop_info (data, PropertyInfo);
CommonInfo *info = state_peek_info (data, CommonInfo);
/* Normal properties */
if (strcmp (info->tag.name, "object") == 0 ||
strcmp (info->tag.name, "template") == 0)
{
ObjectInfo *object_info = (ObjectInfo*)info;
if (prop_info->translatable && prop_info->text->len)
{
const gchar *translated;
translated = _gtk_builder_parser_translate (data->domain,
prop_info->context,
prop_info->text->str);
g_string_assign (prop_info->text, translated);
}
prop_info->data = g_string_free (prop_info->text, FALSE);
object_info->properties =
g_slist_prepend (object_info->properties, prop_info);
}
else
g_assert_not_reached ();
}
else if (strcmp (element_name, "child") == 0)
{
ChildInfo *child_info = state_pop_info (data, ChildInfo);
_gtk_builder_add (data->builder, child_info);
free_child_info (child_info);
}
else if (strcmp (element_name, "signal") == 0)
{
SignalInfo *signal_info = state_pop_info (data, SignalInfo);
ObjectInfo *object_info = (ObjectInfo*)state_peek_info (data, CommonInfo);
signal_info->object_name = g_strdup (object_info->id);
object_info->signals =
g_slist_prepend (object_info->signals, signal_info);
}
else if (strcmp (element_name, "placeholder") == 0)
{
}
else
{
g_assert_not_reached ();
}
}
/* Called for character data */
/* text is not nul-terminated */
static void
text (GMarkupParseContext *context,
const gchar *text,
gsize text_len,
gpointer user_data,
GError **error)
{
ParserData *data = (ParserData*)user_data;
CommonInfo *info;
if (data->subparser && data->subparser->start)
{
GError *tmp_error = NULL;
if (data->subparser->parser->text)
data->subparser->parser->text (context, text, text_len,
data->subparser->data, &tmp_error);
if (tmp_error)
g_propagate_error (error, tmp_error);
return;
}
if (!data->stack)
return;
info = state_peek_info (data, CommonInfo);
g_assert (info != NULL);
if (strcmp (g_markup_parse_context_get_element (context), "property") == 0)
{
PropertyInfo *prop_info = (PropertyInfo*)info;
g_string_append_len (prop_info->text, text, text_len);
}
}
static void
free_info (CommonInfo *info)
{
if (strcmp (info->tag.name, "object") == 0 ||
strcmp (info->tag.name, "template") == 0)
free_object_info ((ObjectInfo *)info);
else if (strcmp (info->tag.name, "child") == 0)
free_child_info ((ChildInfo *)info);
else if (strcmp (info->tag.name, "property") == 0)
free_property_info ((PropertyInfo *)info);
else if (strcmp (info->tag.name, "signal") == 0)
_free_signal_info ((SignalInfo *)info, NULL);
else if (strcmp (info->tag.name, "requires") == 0)
free_requires_info ((RequiresInfo *)info, NULL);
else if (strcmp (info->tag.name, "menu") == 0)
free_menu_info ((MenuInfo *)info);
else
g_assert_not_reached ();
}
static const GMarkupParser parser = {
start_element,
end_element,
text,
NULL,
};
void
_gtk_builder_parser_parse_buffer (GtkBuilder *builder,
const gchar *filename,
const gchar *buffer,
gsize length,
gchar **requested_objs,
GError **error)
{
const gchar* domain;
ParserData *data;
GSList *l;
/* Store the original domain so that interface domain attribute can be
* applied for the builder and the original domain can be restored after
* parsing has finished. This allows subparsers to translate elements with
* gtk_builder_get_translation_domain() without breaking the ABI or API
*/
domain = gtk_builder_get_translation_domain (builder);
data = g_new0 (ParserData, 1);
data->builder = builder;
data->filename = filename;
data->domain = g_strdup (domain);
data->object_ids = g_hash_table_new_full (g_str_hash, g_str_equal,
(GDestroyNotify)g_free, NULL);
data->requested_objects = NULL;
if (requested_objs)
{
gint i;
data->inside_requested_object = FALSE;
for (i = 0; requested_objs[i]; ++i)
{
data->requested_objects = g_slist_prepend (data->requested_objects,
g_strdup (requested_objs[i]));
}
}
else
{
/* get all the objects */
data->inside_requested_object = TRUE;
}
data->ctx = g_markup_parse_context_new (&parser,
G_MARKUP_TREAT_CDATA_AS_TEXT,
data, NULL);
if (!g_markup_parse_context_parse (data->ctx, buffer, length, error))
goto out;
_gtk_builder_finish (builder);
/* Custom parser_finished */
data->custom_finalizers = g_slist_reverse (data->custom_finalizers);
for (l = data->custom_finalizers; l; l = l->next)
{
SubParser *sub = (SubParser*)l->data;
gtk_buildable_custom_finished (GTK_BUILDABLE (sub->object),
builder,
sub->child,
sub->tagname,
sub->data);
}
/* Common parser_finished, for all created objects */
data->finalizers = g_slist_reverse (data->finalizers);
for (l = data->finalizers; l; l = l->next)
{
GtkBuildable *buildable = (GtkBuildable*)l->data;
gtk_buildable_parser_finished (GTK_BUILDABLE (buildable), builder);
}
out:
g_slist_foreach (data->stack, (GFunc)free_info, NULL);
g_slist_free (data->stack);
g_slist_foreach (data->custom_finalizers, (GFunc)free_subparser, NULL);
g_slist_free (data->custom_finalizers);
g_slist_free (data->finalizers);
g_slist_foreach (data->requested_objects, (GFunc) g_free, NULL);
g_slist_free (data->requested_objects);
g_free (data->domain);
g_hash_table_destroy (data->object_ids);
g_markup_parse_context_free (data->ctx);
g_free (data);
/* restore the original domain */
gtk_builder_set_translation_domain (builder, domain);
}
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