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gtk2/gtk/gtkbuilderparser.c
Timm Bäder 7789d0e23f builder: Make object names a const array 
We don't take ownership.
2020-03-07 15:30:38 +01:00

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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 "gtkbuilderprivate.h"
#include "gtkbuildable.h"
#include "gtkbuilderscopeprivate.h"
#include "gtkdebug.h"
#include "gtkintl.h"
#include "gtktypebuiltins.h"
#include "gtkversion.h"
#include "gdkprofilerprivate.h"
#include <gio/gio.h>
#include <string.h>
typedef struct {
const GtkBuildableParser *last_parser;
gpointer last_user_data;
int last_depth;
} GtkBuildableParserStack;
static void
pop_subparser_stack (GtkBuildableParseContext *context)
{
GtkBuildableParserStack *stack =
&g_array_index (context->subparser_stack, GtkBuildableParserStack,
context->subparser_stack->len - 1);
context->awaiting_pop = TRUE;
context->held_user_data = context->user_data;
context->user_data = stack->last_user_data;
context->parser = stack->last_parser;
g_array_set_size (context->subparser_stack, context->subparser_stack->len - 1);
}
static void
possibly_finish_subparser (GtkBuildableParseContext *context)
{
if (context->subparser_stack->len > 0)
{
GtkBuildableParserStack *stack =
&g_array_index (context->subparser_stack, GtkBuildableParserStack,
context->subparser_stack->len - 1);
if (stack->last_depth == context->tag_stack->len)
pop_subparser_stack (context);
}
}
static void
proxy_start_element (GMarkupParseContext *gm_context,
const gchar *element_name,
const gchar **attribute_names,
const gchar **attribute_values,
gpointer user_data,
GError **error)
{
GtkBuildableParseContext *context = user_data;
// Due to the way GMarkup works we're sure this will live until the end_element callback
g_ptr_array_add (context->tag_stack, (char *)element_name);
if (context->parser->start_element)
context->parser->start_element (context, element_name,
attribute_names, attribute_values,
context->user_data, error);
}
static void
proxy_end_element (GMarkupParseContext *gm_context,
const gchar *element_name,
gpointer user_data,
GError **error)
{
GtkBuildableParseContext *context = user_data;
possibly_finish_subparser (context);
if (context->parser->end_element)
context->parser->end_element (context, element_name, context->user_data, error);
g_ptr_array_set_size (context->tag_stack, context->tag_stack->len - 1);
}
static void
proxy_text (GMarkupParseContext *gm_context,
const gchar *text,
gsize text_len,
gpointer user_data,
GError **error)
{
GtkBuildableParseContext *context = user_data;
if (context->parser->text)
context->parser->text (context, text, text_len, context->user_data, error);
}
static void
proxy_error (GMarkupParseContext *gm_context,
GError *error,
gpointer user_data)
{
GtkBuildableParseContext *context = user_data;
if (context->parser->error)
context->parser->error (context, error, context->user_data);
/* report the error all the way up to free all the user-data */
while (context->subparser_stack->len > 0)
{
pop_subparser_stack (context);
context->awaiting_pop = FALSE; /* already been freed */
if (context->parser->error)
context->parser->error (context, error, context->user_data);
}
}
static const GMarkupParser gmarkup_parser = {
proxy_start_element,
proxy_end_element,
proxy_text,
NULL,
proxy_error,
};
static void
gtk_buildable_parse_context_init (GtkBuildableParseContext *context,
const GtkBuildableParser *parser,
gpointer user_data)
{
context->internal_callbacks = &gmarkup_parser;
context->ctx = NULL;
context->parser = parser;
context->user_data = user_data;
context->subparser_stack = g_array_new (FALSE, FALSE, sizeof (GtkBuildableParserStack));
context->tag_stack = g_ptr_array_new ();
context->held_user_data = NULL;
context->awaiting_pop = FALSE;
}
static void
gtk_buildable_parse_context_free (GtkBuildableParseContext *context)
{
g_array_unref (context->subparser_stack);
g_ptr_array_unref (context->tag_stack);
}
static gboolean
gtk_buildable_parse_context_parse (GtkBuildableParseContext *context,
const gchar *text,
gssize text_len,
GError **error)
{
gboolean res;
if (_gtk_buildable_parser_is_precompiled (text, text_len))
{
res = _gtk_buildable_parser_replay_precompiled (context, text, text_len, error);
}
else
{
context->ctx = g_markup_parse_context_new (context->internal_callbacks,
G_MARKUP_TREAT_CDATA_AS_TEXT,
context, NULL);
res = g_markup_parse_context_parse (context->ctx, text, text_len, error);
g_markup_parse_context_free (context->ctx);
}
return res;
}
/**
* gtk_buildable_parse_context_push:
* @context: a #GtkBuildableParseContext
* @parser: a #GtkBuildableParser
* @user_data: user data to pass to #GtkBuildableParser functions
*
* Temporarily redirects markup data to a sub-parser.
*
* This function may only be called from the start_element handler of
* a #GtkBuildableParser. It must be matched with a corresponding call to
* gtk_buildable_parse_context_pop() in the matching end_element handler
* (except in the case that the parser aborts due to an error).
*
* All tags, text and other data between the matching tags is
* redirected to the subparser given by @parser. @user_data is used
* as the user_data for that parser. @user_data is also passed to the
* error callback in the event that an error occurs. This includes
* errors that occur in subparsers of the subparser.
*
* The end tag matching the start tag for which this call was made is
* handled by the previous parser (which is given its own user_data)
* which is why gtk_buildable_parse_context_pop() is provided to allow "one
* last access" to the @user_data provided to this function. In the
* case of error, the @user_data provided here is passed directly to
* the error callback of the subparser and gtk_buildable_parse_context_pop()
* should not be called. In either case, if @user_data was allocated
* then it ought to be freed from both of these locations.
*
* This function is not intended to be directly called by users
* interested in invoking subparsers. Instead, it is intended to be
* used by the subparsers themselves to implement a higher-level
* interface.
*
* For an example of how to use this, see g_markup_parse_context_push() which
* has the same kind of API.
**/
void
gtk_buildable_parse_context_push (GtkBuildableParseContext *context,
const GtkBuildableParser *parser,
gpointer user_data)
{
GtkBuildableParserStack stack = { 0 };
stack.last_parser = context->parser;
stack.last_user_data = context->user_data;
stack.last_depth = context->tag_stack->len; // If at end_element time we're this deep, then pop it
context->parser = parser;
context->user_data = user_data;
g_array_append_val (context->subparser_stack, stack);
}
/**
* gtk_buildable_parse_context_pop:
* @context: a #GtkBuildableParseContext
*
* Completes the process of a temporary sub-parser redirection.
*
* This function exists to collect the user_data allocated by a
* matching call to gtk_buildable_parse_context_push(). It must be called
* in the end_element handler corresponding to the start_element
* handler during which gtk_buildable_parse_context_push() was called.
* You must not call this function from the error callback -- the
* @user_data is provided directly to the callback in that case.
*
* This function is not intended to be directly called by users
* interested in invoking subparsers. Instead, it is intended to
* be used by the subparsers themselves to implement a higher-level
* interface.
*
* Returns: the user data passed to gtk_buildable_parse_context_push()
*/
gpointer
gtk_buildable_parse_context_pop (GtkBuildableParseContext *context)
{
gpointer user_data;
if (!context->awaiting_pop)
possibly_finish_subparser (context);
g_assert (context->awaiting_pop);
context->awaiting_pop = FALSE;
user_data = context->held_user_data;
context->held_user_data = NULL;
return user_data;
}
/**
* gtk_buildable_parse_context_get_element:
* @context: a #GtkBuildablParseContext
*
* Retrieves the name of the currently open element.
*
* If called from the start_element or end_element handlers this will
* give the element_name as passed to those functions. For the parent
* elements, see gtk_buildable_parse_context_get_element_stack().
*
* Returns: the name of the currently open element, or %NULL
*/
const char *
gtk_buildable_parse_context_get_element (GtkBuildableParseContext *context)
{
if (context->tag_stack->len > 0)
return g_ptr_array_index (context->tag_stack, context->tag_stack->len - 1);
return NULL;
}
/**
* gtk_buildable_parse_context_get_element_stack:
* @context: a #GtkBuildableParseContext
*
* Retrieves the element stack from the internal state of the parser.
*
* The returned #GPtrArray is an array of strings where the last item is
* the currently open tag (as would be returned by
* gtk_buildable_parse_context_get_element()) and the previous item is its
* immediate parent.
*
* This function is intended to be used in the start_element and
* end_element handlers where gtk_buildable_parse_context_get_element()
* would merely return the name of the element that is being
* processed.
*
* Returns: (transfer none) (element-type utf8): the element stack, which must not be modified
*/
GPtrArray *
gtk_buildable_parse_context_get_element_stack (GtkBuildableParseContext *context)
{
return context->tag_stack;
}
/**
* gtk_buildable_parse_context_get_position:
* @context: a #GtkBuildableParseContext
* @line_number: (out) (optional): return location for a line number, or %NULL
* @char_number: (out) (optional): return location for a char-on-line number, or %NULL
*
* Retrieves the current line number and the number of the character on
* that line. Intended for use in error messages; there are no strict
* semantics for what constitutes the "current" line number other than
* "the best number we could come up with for error messages."
*/
void
gtk_buildable_parse_context_get_position (GtkBuildableParseContext *context,
gint *line_number,
gint *char_number)
{
if (context->ctx)
g_markup_parse_context_get_position (context->ctx, line_number, char_number);
else
{
if (line_number)
*line_number = 0;
if (char_number)
*char_number = 0;
}
}
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;
g_assert (data->stack);
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, col;
gtk_buildable_parse_context_get_position (&data->ctx, &line, &col);
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_MISSING_ATTRIBUTE,
"%s:%d:%d <%s> requires attribute '%s'",
data->filename, line, col, tag, attribute);
}
static void
error_invalid_tag (ParserData *data,
const gchar *tag,
const gchar *expected,
GError **error)
{
gint line, col;
gtk_buildable_parse_context_get_position (&data->ctx, &line, &col);
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, col, 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, col, tag);
}
static void
error_unhandled_tag (ParserData *data,
const gchar *tag,
GError **error)
{
gint line, col;
gtk_buildable_parse_context_get_position (&data->ctx, &line, &col);
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_UNHANDLED_TAG,
"%s:%d:%d Unhandled tag: <%s>",
data->filename, line, col, tag);
}
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 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 version_major = 0;
gint version_minor = 0;
if (!g_markup_collect_attributes (element_name, names, values, error,
G_MARKUP_COLLECT_STRING, "lib", &library,
G_MARKUP_COLLECT_STRING, "version", &version,
G_MARKUP_COLLECT_INVALID))
{
_gtk_builder_prefix_error (data->builder, &data->ctx, error);
return;
}
if (!(split = g_strsplit (version, ".", 2)) || !split[0] || !split[1])
{
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_INVALID_VALUE,
"'version' attribute has malformed value '%s'", version);
_gtk_builder_prefix_error (data->builder, &data->ctx, error);
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_type = TAG_REQUIRES;
}
static gboolean
is_requested_object (const gchar *object,
ParserData *data)
{
int i;
for (i = 0; data->requested_objects[i]; ++i)
{
if (g_strcmp0 (data->requested_objects[i], object) == 0)
return TRUE;
}
return FALSE;
}
static void
parse_object (GtkBuildableParseContext *context,
ParserData *data,
const gchar *element_name,
const gchar **names,
const gchar **values,
GError **error)
{
ObjectInfo *object_info;
ChildInfo* child_info;
GType object_type = G_TYPE_INVALID;
const gchar *object_class = NULL;
const gchar *constructor = NULL;
const gchar *type_func = NULL;
const gchar *object_id = NULL;
gchar *internal_id = NULL;
gint line;
child_info = state_peek_info (data, ChildInfo);
if (child_info && child_info->tag_type == TAG_OBJECT)
{
error_invalid_tag (data, element_name, NULL, error);
return;
}
/* Even though 'class' is a mandatory attribute, we don't flag its
* absence here because it's supposed to throw
* GTK_BUILDER_ERROR_MISSING_ATTRIBUTE, not
* G_MARKUP_ERROR_MISSING_ATTRIBUTE. It's handled immediately
* afterwards.
*/
if (!g_markup_collect_attributes (element_name, names, values, error,
G_MARKUP_COLLECT_STRING|G_MARKUP_COLLECT_OPTIONAL, "class", &object_class,
G_MARKUP_COLLECT_STRING|G_MARKUP_COLLECT_OPTIONAL, "constructor", &constructor,
G_MARKUP_COLLECT_STRING|G_MARKUP_COLLECT_OPTIONAL, "type-func", &type_func,
G_MARKUP_COLLECT_STRING|G_MARKUP_COLLECT_OPTIONAL, "id", &object_id,
G_MARKUP_COLLECT_INVALID))
{
_gtk_builder_prefix_error (data->builder, &data->ctx, error);
return;
}
if (!object_class)
{
error_missing_attribute (data, element_name, "class", error);
return;
}
if (type_func)
{
/* Call the GType function, and return the GType, it's guaranteed afterwards
* that g_type_from_name on the name will return our GType
*/
object_type = gtk_builder_scope_get_type_from_function (gtk_builder_get_scope (data->builder), data->builder, type_func);
if (object_type == G_TYPE_INVALID)
{
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_INVALID_TYPE_FUNCTION,
"Invalid type function '%s'", type_func);
_gtk_builder_prefix_error (data->builder, context, error);
return;
}
}
else
{
g_assert_nonnull (object_class);
object_type = gtk_builder_get_type_from_name (data->builder, object_class);
if (object_type == G_TYPE_INVALID)
{
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_INVALID_VALUE,
"Invalid object type '%s'", object_class);
_gtk_builder_prefix_error (data->builder, context, error);
return;
}
}
if (!object_id)
{
internal_id = g_strdup_printf ("___object_%d___", ++data->object_counter);
object_id = internal_id;
}
++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_message ("requested object \"%s\" found at level %d",
object_id, data->requested_object_level));
data->inside_requested_object = TRUE;
}
else
{
g_free (internal_id);
return;
}
}
object_info = g_slice_new0 (ObjectInfo);
object_info->tag_type = TAG_OBJECT;
object_info->type = object_type;
object_info->oclass = g_type_class_ref (object_type);
object_info->id = (internal_id) ? internal_id : g_strdup (object_id);
object_info->constructor = g_strdup (constructor);
object_info->parent = (CommonInfo*)child_info;
state_push (data, object_info);
line = GPOINTER_TO_INT (g_hash_table_lookup (data->object_ids, object_id));
if (line != 0)
{
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_DUPLICATE_ID,
"Duplicate object ID '%s' (previously on line %d)",
object_id, line);
_gtk_builder_prefix_error (data->builder, context, error);
return;
}
gtk_buildable_parse_context_get_position (context, &line, NULL);
g_hash_table_insert (data->object_ids, g_strdup (object_id), GINT_TO_POINTER (line));
}
static void
parse_template (GtkBuildableParseContext *context,
ParserData *data,
const gchar *element_name,
const gchar **names,
const gchar **values,
GError **error)
{
ObjectInfo *object_info;
const gchar *object_class = NULL;
const gchar *parent_class = NULL;
gint line;
GType template_type;
GType parsed_type;
template_type = _gtk_builder_get_template_type (data->builder);
if (!g_markup_collect_attributes (element_name, names, values, error,
G_MARKUP_COLLECT_STRING, "class", &object_class,
G_MARKUP_COLLECT_STRING|G_MARKUP_COLLECT_OPTIONAL, "parent", &parent_class,
G_MARKUP_COLLECT_INVALID))
{
_gtk_builder_prefix_error (data->builder, &data->ctx, error);
return;
}
if (template_type == 0)
{
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_UNHANDLED_TAG,
"Template declaration (class '%s', parent '%s') where templates aren't supported",
object_class, parent_class ? parent_class : "GtkWidget");
_gtk_builder_prefix_error (data->builder, context, error);
return;
}
else if (state_peek (data) != NULL)
{
error_invalid_tag (data, "template", NULL, 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));
_gtk_builder_prefix_error (data->builder, context, error);
return;
}
if (parent_class)
{
GType parent_type = g_type_from_name (parent_class);
GType expected_type = g_type_parent (parsed_type);
if (parent_type == G_TYPE_INVALID)
{
g_set_error (error, GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_INVALID_VALUE,
"Invalid template parent type '%s'", parent_class);
_gtk_builder_prefix_error (data->builder, context, error);
return;
}
if (parent_type != expected_type)
{
g_set_error (error, GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_TEMPLATE_MISMATCH,
"Template parent type '%s' does not match instance parent type '%s'.",
parent_class, g_type_name (expected_type));
_gtk_builder_prefix_error (data->builder, context, error);
return;
}
}
++data->cur_object_level;
object_info = g_slice_new0 (ObjectInfo);
object_info->tag_type = TAG_TEMPLATE;
object_info->type = parsed_type;
object_info->oclass = g_type_class_ref (parsed_type);
object_info->id = g_strdup (object_class);
object_info->object = gtk_builder_get_object (data->builder, object_class);
state_push (data, object_info);
line = GPOINTER_TO_INT (g_hash_table_lookup (data->object_ids, object_class));
if (line != 0)
{
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_DUPLICATE_ID,
"Duplicate object ID '%s' (previously on line %d)",
object_class, line);
_gtk_builder_prefix_error (data->builder, context, error);
return;
}
gtk_buildable_parse_context_get_position (context, &line, NULL);
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_type_class_unref (info->oclass);
g_slist_free (info->signals);
g_slist_free_full (info->properties, (GDestroyNotify)free_property_info);
g_free (info->constructor);
g_free (info->id);
g_slice_free (ObjectInfo, 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;
const gchar *type = NULL;
const gchar *internal_child = NULL;
object_info = state_peek_info (data, ObjectInfo);
if (!object_info ||
!(object_info->tag_type == TAG_OBJECT ||
object_info->tag_type == TAG_TEMPLATE))
{
error_invalid_tag (data, element_name, NULL, error);
return;
}
if (!g_markup_collect_attributes (element_name, names, values, error,
G_MARKUP_COLLECT_STRING|G_MARKUP_COLLECT_OPTIONAL, "type", &type,
G_MARKUP_COLLECT_STRING|G_MARKUP_COLLECT_OPTIONAL, "internal-child", &internal_child,
G_MARKUP_COLLECT_INVALID))
{
_gtk_builder_prefix_error (data->builder, &data->ctx, error);
return;
}
child_info = g_slice_new0 (ChildInfo);
child_info->tag_type = TAG_CHILD;
child_info->type = g_strdup (type);
child_info->internal_child = g_strdup (internal_child);
child_info->parent = (CommonInfo*)object_info;
state_push (data, child_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;
const gchar *name = NULL;
const gchar *context = NULL;
const gchar *bind_source = NULL;
const gchar *bind_property = NULL;
const gchar *bind_flags_str = NULL;
GBindingFlags bind_flags = G_BINDING_DEFAULT;
gboolean translatable = FALSE;
ObjectInfo *object_info;
GParamSpec *pspec = NULL;
gint line, col;
object_info = state_peek_info (data, ObjectInfo);
if (!object_info ||
!(object_info->tag_type == TAG_OBJECT ||
object_info->tag_type == TAG_TEMPLATE))
{
error_invalid_tag (data, element_name, NULL, error);
return;
}
if (!g_markup_collect_attributes (element_name, names, values, error,
G_MARKUP_COLLECT_STRING, "name", &name,
G_MARKUP_COLLECT_BOOLEAN|G_MARKUP_COLLECT_OPTIONAL, "translatable", &translatable,
G_MARKUP_COLLECT_STRING|G_MARKUP_COLLECT_OPTIONAL, "comments", NULL,
G_MARKUP_COLLECT_STRING|G_MARKUP_COLLECT_OPTIONAL, "context", &context,
G_MARKUP_COLLECT_STRING|G_MARKUP_COLLECT_OPTIONAL, "bind-source", &bind_source,
G_MARKUP_COLLECT_STRING|G_MARKUP_COLLECT_OPTIONAL, "bind-property", &bind_property,
G_MARKUP_COLLECT_STRING|G_MARKUP_COLLECT_OPTIONAL, "bind-flags", &bind_flags_str,
G_MARKUP_COLLECT_INVALID))
{
_gtk_builder_prefix_error (data->builder, &data->ctx, error);
return;
}
pspec = g_object_class_find_property (object_info->oclass, name);
if (!pspec)
{
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_INVALID_PROPERTY,
"Invalid property: %s.%s",
g_type_name (object_info->type), name);
_gtk_builder_prefix_error (data->builder, &data->ctx, error);
return;
}
if (bind_flags_str)
{
if (!_gtk_builder_flags_from_string (G_TYPE_BINDING_FLAGS, NULL, bind_flags_str, &bind_flags, error))
{
_gtk_builder_prefix_error (data->builder, &data->ctx, error);
return;
}
}
gtk_buildable_parse_context_get_position (&data->ctx, &line, &col);
if (bind_source)
{
BindingInfo *binfo;
binfo = g_slice_new (BindingInfo);
binfo->target = NULL;
binfo->target_pspec = pspec;
binfo->source = g_strdup (bind_source);
binfo->source_property = bind_property ? g_strdup (bind_property) : g_strdup (name);
binfo->flags = bind_flags;
binfo->line = line;
binfo->col = col;
object_info->bindings = g_slist_prepend (object_info->bindings, binfo);
}
else if (bind_property)
{
error_missing_attribute (data, element_name,
"bind-source",
error);
return;
}
info = g_slice_new (PropertyInfo);
info->tag_type = TAG_PROPERTY;
info->pspec = pspec;
info->text = g_string_new ("");
info->translatable = translatable;
info->bound = bind_source != NULL;
info->context = g_strdup (context);
info->line = line;
info->col = col;
state_push (data, info);
}
static void
free_property_info (PropertyInfo *info)
{
g_string_free (info->text, TRUE);
g_free (info->context);
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;
const gchar *name;
const gchar *handler = NULL;
const gchar *object = NULL;
gboolean after = FALSE;
gboolean swapped = -1;
ObjectInfo *object_info;
guint id = 0;
GQuark detail = 0;
object_info = state_peek_info (data, ObjectInfo);
if (!object_info ||
!(object_info->tag_type == TAG_OBJECT||
object_info->tag_type == TAG_TEMPLATE))
{
error_invalid_tag (data, element_name, NULL, error);
return;
}
if (!g_markup_collect_attributes (element_name, names, values, error,
G_MARKUP_COLLECT_STRING, "name", &name,
G_MARKUP_COLLECT_STRING, "handler", &handler,
G_MARKUP_COLLECT_STRING|G_MARKUP_COLLECT_OPTIONAL, "object", &object,
G_MARKUP_COLLECT_STRING|G_MARKUP_COLLECT_OPTIONAL, "last_modification_time", NULL,
G_MARKUP_COLLECT_BOOLEAN|G_MARKUP_COLLECT_OPTIONAL, "after", &after,
G_MARKUP_COLLECT_TRISTATE|G_MARKUP_COLLECT_OPTIONAL, "swapped", &swapped,
G_MARKUP_COLLECT_INVALID))
{
_gtk_builder_prefix_error (data->builder, &data->ctx, error);
return;
}
if (!g_signal_parse_name (name, object_info->type, &id, &detail, FALSE))
{
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_INVALID_SIGNAL,
"Invalid signal '%s' for type '%s'",
name, g_type_name (object_info->type));
_gtk_builder_prefix_error (data->builder, &data->ctx, error);
return;
}
/* Swapped defaults to FALSE except when object is set */
if (swapped == -1)
{
if (object)
swapped = TRUE;
else
swapped = FALSE;
}
info = g_slice_new0 (SignalInfo);
info->id = id;
info->detail = detail;
info->handler = g_strdup (handler);
if (after)
info->flags |= G_CONNECT_AFTER;
if (swapped)
info->flags |= G_CONNECT_SWAPPED;
info->connect_object_name = g_strdup (object);
state_push (data, info);
info->tag_type = TAG_SIGNAL;
}
/* Called by GtkBuilder */
void
_free_signal_info (SignalInfo *info,
gpointer user_data)
{
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)
{
const gchar *domain = NULL;
if (!g_markup_collect_attributes (element_name, names, values, error,
G_MARKUP_COLLECT_STRING|G_MARKUP_COLLECT_OPTIONAL, "domain", &domain,
G_MARKUP_COLLECT_INVALID))
{
_gtk_builder_prefix_error (data->builder, &data->ctx, error);
return;
}
if (domain)
{
if (data->domain && strcmp (data->domain, domain) != 0)
{
g_warning ("%s: interface domain '%s' overrides programmatic value '%s'",
data->filename, domain, data->domain);
g_free (data->domain);
}
data->domain = g_strdup (domain);
gtk_builder_set_translation_domain (data->builder, data->domain);
}
}
static SubParser *
create_subparser (GObject *object,
GObject *child,
const gchar *element_name,
GtkBuildableParser *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 (GtkBuildableParser));
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 (GtkBuildableParseContext *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 (GtkBuildableParseContext *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 (*error)
return;
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_builder_lookup_failed (data->builder, error))
return;
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 (GtkBuildableParseContext *context,
const gchar *element_name,
const gchar **names,
const gchar **values,
ParserData *data,
GError **error)
{
CommonInfo* parent_info;
GtkBuildableParser parser;
gpointer subparser_data;
GObject *object;
GObject *child;
parent_info = state_peek_info (data, CommonInfo);
if (!parent_info)
return FALSE;
if (parent_info->tag_type == TAG_OBJECT ||
parent_info->tag_type == TAG_TEMPLATE)
{
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 (parent_info->tag_type == TAG_CHILD)
{
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 (GtkBuildableParseContext *context,
const gchar *element_name,
const gchar **names,
const gchar **values,
gpointer user_data,
GError **error)
{
ParserData *data = (ParserData*)user_data;
#ifdef G_ENABLE_DEBUG
if (GTK_DEBUG_CHECK (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_message ("<%s%s>", element_name, tags->str);
g_string_free (tags, TRUE);
}
#endif
if (!data->last_element && strcmp (element_name, "interface") != 0)
{
error_unhandled_tag (data, element_name, error);
return;
}
data->last_element = element_name;
if (data->subparser)
{
if (!subparser_start (context, element_name, names, values, data, error))
return;
}
if (strcmp (element_name, "object") == 0)
parse_object (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 */
}
else if (strcmp (element_name, "property") == 0)
parse_property (data, element_name, names, values, error);
else if (strcmp (element_name, "child") == 0)
parse_child (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, "template") == 0)
parse_template (context, data, element_name, names, values, error);
else if (strcmp (element_name, "requires") == 0)
parse_requires (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))
error_unhandled_tag (data, element_name, error);
}
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;
}
static void
end_element (GtkBuildableParseContext *context,
const gchar *element_name,
gpointer user_data,
GError **error)
{
ParserData *data = (ParserData*)user_data;
GTK_NOTE (BUILDER, g_message ("</%s>", element_name));
if (data->subparser && data->subparser->start)
{
subparser_end (context, element_name, data, error);
return;
}
if (data->requested_objects && !data->inside_requested_object)
{
/* If outside a requested object, simply ignore this tag */
}
else if (strcmp (element_name, "property") == 0)
{
PropertyInfo *prop_info = state_pop_info (data, PropertyInfo);
CommonInfo *info = state_peek_info (data, CommonInfo);
g_assert (info != NULL);
/* Normal properties */
if (info->tag_type == TAG_OBJECT ||
info->tag_type == TAG_TEMPLATE)
{
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);
}
object_info->properties = g_slist_prepend (object_info->properties, prop_info);
}
else
g_assert_not_reached ();
}
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);
PropertyInfo* prop_info = state_peek_info (data, PropertyInfo);
if (child_info && child_info->tag_type != TAG_CHILD)
child_info = NULL;
if (prop_info && prop_info->tag_type != TAG_PROPERTY)
prop_info = NULL;
if (data->requested_objects && data->inside_requested_object &&
(data->cur_object_level == data->requested_object_level))
{
GTK_NOTE (BUILDER,
g_message ("requested object end found at level %d",
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 (prop_info)
g_string_assign (prop_info->text, object_info->id);
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, "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);
g_assert (object_info != NULL);
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, "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,
"Required %s version %d.%d, current version is %d.%d",
req_info->library,
req_info->major, req_info->minor,
GTK_MAJOR_VERSION, GTK_MINOR_VERSION);
_gtk_builder_prefix_error (data->builder, context, error);
}
}
free_requires_info (req_info, NULL);
}
else if (strcmp (element_name, "interface") == 0)
{
}
else if (strcmp (element_name, "menu") == 0)
{
_gtk_builder_menu_end (data);
}
else if (strcmp (element_name, "placeholder") == 0)
{
}
else
{
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_UNHANDLED_TAG,
"Unhandled tag: <%s>", element_name);
_gtk_builder_prefix_error (data->builder, context, error);
}
}
/* Called for character data */
/* text is not nul-terminated */
static void
text (GtkBuildableParseContext *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 (gtk_buildable_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)
{
switch (info->tag_type)
{
case TAG_OBJECT:
case TAG_TEMPLATE:
free_object_info ((ObjectInfo *)info);
break;
case TAG_CHILD:
free_child_info ((ChildInfo *)info);
break;
case TAG_PROPERTY:
free_property_info ((PropertyInfo *)info);
break;
case TAG_SIGNAL:
_free_signal_info ((SignalInfo *)info, NULL);
break;
case TAG_REQUIRES:
free_requires_info ((RequiresInfo *)info, NULL);
break;
default:
g_assert_not_reached ();
}
}
static const GtkBuildableParser parser = {
start_element,
end_element,
text,
NULL,
};
void
_gtk_builder_parser_parse_buffer (GtkBuilder *builder,
const gchar *filename,
const gchar *buffer,
gssize length,
const char **requested_objs,
GError **error)
{
const gchar* domain;
ParserData data;
GSList *l;
gint64 before = g_get_monotonic_time ();
/* 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);
memset (&data, 0, sizeof (ParserData));
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);
if (requested_objs)
{
data.inside_requested_object = FALSE;
data.requested_objects = requested_objs;
}
else
{
/* get all the objects */
data.inside_requested_object = TRUE;
}
gtk_buildable_parse_context_init (&data.ctx, &parser, &data);
if (!gtk_buildable_parse_context_parse (&data.ctx, buffer, length, error))
goto out;
if (_gtk_builder_lookup_failed (builder, error))
goto out;
if (!_gtk_builder_finish (builder, error))
goto out;
/* 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);
if (_gtk_builder_lookup_failed (builder, error))
goto out;
}
/* 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);
if (_gtk_builder_lookup_failed (builder, error))
goto out;
}
out:
g_slist_free_full (data.stack, (GDestroyNotify)free_info);
g_slist_free_full (data.custom_finalizers, (GDestroyNotify)free_subparser);
g_slist_free (data.finalizers);
g_free (data.domain);
g_hash_table_destroy (data.object_ids);
gtk_buildable_parse_context_free (&data.ctx);
/* restore the original domain */
gtk_builder_set_translation_domain (builder, domain);
if (GDK_PROFILER_IS_RUNNING)
{
guint64 after = g_get_monotonic_time ();
if (after - before > 500)
gdk_profiler_add_mark (before, after - before, "builder load", filename);
}
}
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