AuroraMiddleware/gtk2
1
0
Fork 0
forked from AuroraMiddleware/gtk
Code Issues Pull Requests Projects Releases Wiki Activity
34038aaf7d
gtk2/gtk/gtkbuilder.c
Emmanuele Bassi ff46ea64c4 docs: Escape the XML tags in the Widget class description 
While gtk-doc doesn't care, this isn't really valid Markdown as the
GtkBuilder custom XML tags will be considered valid markup and embedded
as they are, breaking the HTML output.
2021-08-22 19:38:44 +01:00

2906 lines
90 KiB
C
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/* GTK - The GIMP Toolkit
* Copyright (C) 1998-2002 James Henstridge <james@daa.com.au>
* Copyright (C) 2006-2007 Async Open Source,
* Johan Dahlin <jdahlin@async.com.br>,
* Henrique Romano <henrique@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/>.
*/
/**
* SECTION:gtkbuilder
* @Short_description: Build an interface from an XML UI definition
* @Title: GtkBuilder
*
* A GtkBuilder is an auxiliary object that reads textual descriptions
* of a user interface and instantiates the described objects. To create
* a GtkBuilder from a user interface description, call
* gtk_builder_new_from_file(), gtk_builder_new_from_resource() or
* gtk_builder_new_from_string().
*
* In the (unusual) case that you want to add user interface
* descriptions from multiple sources to the same GtkBuilder you can
* call gtk_builder_new() to get an empty builder and populate it by
* (multiple) calls to gtk_builder_add_from_file(),
* gtk_builder_add_from_resource() or gtk_builder_add_from_string().
*
* A GtkBuilder holds a reference to all objects that it has constructed
* and drops these references when it is finalized. This finalization can
* cause the destruction of non-widget objects or widgets which are not
* contained in a toplevel window. For toplevel windows constructed by a
* builder, it is the responsibility of the user to call gtk_widget_destroy()
* to get rid of them and all the widgets they contain.
*
* The functions gtk_builder_get_object() and gtk_builder_get_objects()
* can be used to access the widgets in the interface by the names assigned
* to them inside the UI description. Toplevel windows returned by these
* functions will stay around until the user explicitly destroys them
* with gtk_widget_destroy(). Other widgets will either be part of a
* larger hierarchy constructed by the builder (in which case you should
* not have to worry about their lifecycle), or without a parent, in which
* case they have to be added to some container to make use of them.
* Non-widget objects need to be reffed with g_object_ref() to keep them
* beyond the lifespan of the builder.
*
* The function gtk_builder_connect_signals() and variants thereof can be
* used to connect handlers to the named signals in the description.
*
* # GtkBuilder UI Definitions # {#BUILDER-UI}
*
* GtkBuilder parses textual descriptions of user interfaces which are
* specified in an XML format which can be roughly described by the
* RELAX NG schema below. We refer to these descriptions as “GtkBuilder
* UI definitions” or just “UI definitions” if the context is clear.
* Do not confuse GtkBuilder UI Definitions with
* [GtkUIManager UI Definitions][XML-UI], which are more limited in scope.
* It is common to use `.ui` as the filename extension for files containing
* GtkBuilder UI definitions.
*
* [RELAX NG Compact Syntax](https://gitlab.gnome.org/GNOME/gtk/-/blob/gtk-3-24/gtk/gtkbuilder.rnc)
*
* The toplevel element is `<interface>`. It optionally takes a “domain”
* attribute, which will make the builder look for translated strings
* using dgettext() in the domain specified. This can also be done by
* calling gtk_builder_set_translation_domain() on the builder.
* Objects are described by `<object>` elements, which can contain
* `<property>` elements to set properties, `<signal>` elements which
* connect signals to handlers, and `<child>` elements, which describe
* child objects (most often widgets inside a container, but also e.g.
* actions in an action group, or columns in a tree model). A `<child>`
* element contains an `<object>` element which describes the child object.
* The target toolkit version(s) are described by `<requires>` elements,
* the “lib” attribute specifies the widget library in question (currently
* the only supported value is “gtk+”) and the “version” attribute specifies
* the target version in the form `<major>.<minor>`. The builder will error
* out if the version requirements are not met.
*
* Typically, the specific kind of object represented by an `<object>`
* element is specified by the “class” attribute. If the type has not
* been loaded yet, GTK+ tries to find the `get_type()` function from the
* class name by applying heuristics. This works in most cases, but if
* necessary, it is possible to specify the name of the get_type() function
* explictly with the "type-func" attribute. As a special case, GtkBuilder
* allows to use an object that has been constructed by a #GtkUIManager in
* another part of the UI definition by specifying the id of the #GtkUIManager
* in the “constructor” attribute and the name of the object in the “id”
* attribute.
*
* Objects may be given a name with the “id” attribute, which allows the
* application to retrieve them from the builder with gtk_builder_get_object().
* An id is also necessary to use the object as property value in other
* parts of the UI definition. GTK+ reserves ids starting and ending
* with `___` (3 underscores) for its own purposes.
*
* Setting properties of objects is pretty straightforward with the
* `<property>` element: the “name” attribute specifies the name of the
* property, and the content of the element specifies the value.
* If the “translatable” attribute is set to a true value, GTK+ uses
* gettext() (or dgettext() if the builder has a translation domain set)
* to find a translation for the value. This happens before the value
* is parsed, so it can be used for properties of any type, but it is
* probably most useful for string properties. It is also possible to
* specify a context to disambiguate short strings, and comments which
* may help the translators.
*
* GtkBuilder can parse textual representations for the most common
* property types: characters, strings, integers, floating-point numbers,
* booleans (strings like “TRUE”, “t”, “yes”, “y”, “1” are interpreted
* as %TRUE, strings like “FALSE”, “f”, “no”, “n”, “0” are interpreted
* as %FALSE), enumerations (can be specified by their name, nick or
* integer value), flags (can be specified by their name, nick, integer
* value, optionally combined with “|”, e.g. “GTK_VISIBLE|GTK_REALIZED”)
* and colors (in a format understood by gdk_rgba_parse()).
*
* GVariants can be specified in the format understood by g_variant_parse(),
* and pixbufs can be specified as a filename of an image file to load.
*
* Objects can be referred to by their name and by default refer to
* objects declared in the local xml fragment and objects exposed via
* gtk_builder_expose_object(). In general, GtkBuilder allows forward
* references to objects — declared in the local xml; an object doesn’t
* have to be constructed before it can be referred to. The exception
* to this rule is that an object has to be constructed before it can
* be used as the value of a construct-only property.
*
* It is also possible to bind a property value to another object's
* property value using the attributes
* "bind-source" to specify the source object of the binding,
* "bind-property" to specify the source property and optionally
* "bind-flags" to specify the binding flags.
* Internally builder implements this using GBinding objects.
* For more information see g_object_bind_property()
*
* Signal handlers are set up with the `<signal>` element. The “name”
* attribute specifies the name of the signal, and the “handler” attribute
* specifies the function to connect to the signal. By default, GTK+ tries
* to find the handler using g_module_symbol(), but this can be changed by
* passing a custom #GtkBuilderConnectFunc to
* gtk_builder_connect_signals_full(). The remaining attributes, “after”,
* “swapped” and “object”, have the same meaning as the corresponding
* parameters of the g_signal_connect_object() or
* g_signal_connect_data() functions. A “last_modification_time”
* attribute is also allowed, but it does not have a meaning to the
* builder.
*
* Sometimes it is necessary to refer to widgets which have implicitly
* been constructed by GTK+ as part of a composite widget, to set
* properties on them or to add further children (e.g. the @vbox of
* a #GtkDialog). This can be achieved by setting the “internal-child”
* property of the `<child>` element to a true value. Note that GtkBuilder
* still requires an `<object>` element for the internal child, even if it
* has already been constructed.
*
* A number of widgets have different places where a child can be added
* (e.g. tabs vs. page content in notebooks). This can be reflected in
* a UI definition by specifying the “type” attribute on a `<child>`
* The possible values for the “type” attribute are described in the
* sections describing the widget-specific portions of UI definitions.
*
* # A GtkBuilder UI Definition
*
* |[<!-- language="xml" -->
* <interface>
* <object class="GtkDialog" id="dialog1">
* <child internal-child="vbox">
* <object class="GtkBox" id="vbox1">
* <property name="border-width">10</property>
* <child internal-child="action_area">
* <object class="GtkButtonBox" id="hbuttonbox1">
* <property name="border-width">20</property>
* <child>
* <object class="GtkButton" id="ok_button">
* <property name="label">gtk-ok</property>
* <property name="use-stock">TRUE</property>
* <signal name="clicked" handler="ok_button_clicked"/>
* </object>
* </child>
* </object>
* </child>
* </object>
* </child>
* </object>
* </interface>
* ]|
*
* Beyond this general structure, several object classes define their
* own XML DTD fragments for filling in the ANY placeholders in the DTD
* above. Note that a custom element in a `<child>` element gets parsed by
* the custom tag handler of the parent object, while a custom element in
* an `<object>` element gets parsed by the custom tag handler of the object.
*
* These XML fragments are explained in the documentation of the
* respective objects.
*
* Additionally, since 3.10 a special `<template>` tag has been added
* to the format allowing one to define a widget class’s components.
* See the [GtkWidget documentation][composite-templates] for details.
*/
#include "config.h"
#include <errno.h> /* errno */
#include <stdlib.h>
#include <string.h> /* strlen */
#include "gtkbuilder.h"
#include "gtkbuildable.h"
#include "gtkbuilderprivate.h"
#include "gtkdebug.h"
#include "gtkmain.h"
#include "gtkintl.h"
#include "gtkprivate.h"
#include "gtktypebuiltins.h"
#include "gtkwindow.h"
#include "gtkicontheme.h"
#include "gtktestutils.h"
#include "deprecated/gtkstock.h"
static void gtk_builder_class_init (GtkBuilderClass *klass);
static void gtk_builder_init (GtkBuilder *builder);
static void gtk_builder_finalize (GObject *object);
static void gtk_builder_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_builder_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static GType gtk_builder_real_get_type_from_name (GtkBuilder *builder,
const gchar *type_name);
enum {
PROP_0,
PROP_TRANSLATION_DOMAIN,
LAST_PROP
};
static GParamSpec *builder_props[LAST_PROP];
struct _GtkBuilderPrivate
{
gchar *domain;
GHashTable *objects;
GHashTable *callbacks;
GSList *delayed_properties;
GSList *signals;
GSList *bindings;
gchar *filename;
gchar *resource_prefix;
GType template_type;
GtkApplication *application;
};
G_DEFINE_TYPE_WITH_PRIVATE (GtkBuilder, gtk_builder, G_TYPE_OBJECT)
static void
gtk_builder_class_init (GtkBuilderClass *klass)
{
GObjectClass *gobject_class;
gobject_class = G_OBJECT_CLASS (klass);
gobject_class->finalize = gtk_builder_finalize;
gobject_class->set_property = gtk_builder_set_property;
gobject_class->get_property = gtk_builder_get_property;
klass->get_type_from_name = gtk_builder_real_get_type_from_name;
/**
* GtkBuilder:translation-domain:
*
* The translation domain used when translating property values that
* have been marked as translatable in interface descriptions.
* If the translation domain is %NULL, #GtkBuilder uses gettext(),
* otherwise g_dgettext().
*
* Since: 2.12
*/
builder_props[PROP_TRANSLATION_DOMAIN] =
g_param_spec_string ("translation-domain",
P_("Translation Domain"),
P_("The translation domain used by gettext"),
NULL,
GTK_PARAM_READWRITE);
g_object_class_install_properties (gobject_class, LAST_PROP, builder_props);
}
static void
gtk_builder_init (GtkBuilder *builder)
{
builder->priv = gtk_builder_get_instance_private (builder);
builder->priv->domain = NULL;
builder->priv->objects = g_hash_table_new_full (g_str_hash, g_str_equal,
g_free, g_object_unref);
}
/*
* GObject virtual methods
*/
static void
gtk_builder_finalize (GObject *object)
{
GtkBuilderPrivate *priv = GTK_BUILDER (object)->priv;
g_free (priv->domain);
g_free (priv->filename);
g_free (priv->resource_prefix);
g_hash_table_destroy (priv->objects);
if (priv->callbacks)
g_hash_table_destroy (priv->callbacks);
g_slist_free_full (priv->signals, (GDestroyNotify)_free_signal_info);
G_OBJECT_CLASS (gtk_builder_parent_class)->finalize (object);
}
static void
gtk_builder_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkBuilder *builder = GTK_BUILDER (object);
switch (prop_id)
{
case PROP_TRANSLATION_DOMAIN:
gtk_builder_set_translation_domain (builder, g_value_get_string (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_builder_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkBuilder *builder = GTK_BUILDER (object);
switch (prop_id)
{
case PROP_TRANSLATION_DOMAIN:
g_value_set_string (value, builder->priv->domain);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/*
* Try to map a type name to a _get_type function
* and call it, eg:
*
* GtkWindow -> gtk_window_get_type
* GtkHBox -> gtk_hbox_get_type
* GtkUIManager -> gtk_ui_manager_get_type
* GWeatherLocation -> gweather_location_get_type
*
* Keep in sync with testsuite/gtk/typename.c !
*/
static gchar *
type_name_mangle (const gchar *name)
{
GString *symbol_name = g_string_new ("");
gint i;
for (i = 0; name[i] != '\0'; i++)
{
/* skip if uppercase, first or previous is uppercase */
if ((name[i] == g_ascii_toupper (name[i]) &&
i > 0 && name[i-1] != g_ascii_toupper (name[i-1])) ||
(i > 2 && name[i] == g_ascii_toupper (name[i]) &&
name[i-1] == g_ascii_toupper (name[i-1]) &&
name[i-2] == g_ascii_toupper (name[i-2])))
g_string_append_c (symbol_name, '_');
g_string_append_c (symbol_name, g_ascii_tolower (name[i]));
}
g_string_append (symbol_name, "_get_type");
return g_string_free (symbol_name, FALSE);
}
static GType
_gtk_builder_resolve_type_lazily (const gchar *name)
{
static GModule *module = NULL;
GTypeGetFunc func;
gchar *symbol;
GType gtype = G_TYPE_INVALID;
if (!module)
module = g_module_open (NULL, 0);
symbol = type_name_mangle (name);
if (g_module_symbol (module, symbol, (gpointer)&func))
gtype = func ();
g_free (symbol);
return gtype;
}
/*
* GtkBuilder virtual methods
*/
static GType
gtk_builder_real_get_type_from_name (GtkBuilder *builder,
const gchar *type_name)
{
GType gtype;
gtype = g_type_from_name (type_name);
if (gtype != G_TYPE_INVALID)
return gtype;
gtype = _gtk_builder_resolve_type_lazily (type_name);
if (gtype != G_TYPE_INVALID)
return gtype;
gtk_test_register_all_types ();
return g_type_from_name (type_name);
}
typedef struct
{
gchar *object;
GParamSpec *pspec;
gchar *value;
gint line;
gint col;
} DelayedProperty;
static void
gtk_builder_get_parameters (GtkBuilder *builder,
GType object_type,
const gchar *object_name,
GSList *properties,
gsize n_properties,
GParamFlags filter_flags,
GArray **parameters,
GArray **filtered_parameters)
{
GSList *l;
DelayedProperty *property;
GError *error = NULL;
/* Create the two arrays with size @n_properties. The total number of elements
* between them will eventually be @n_properties, but it’s more important to
* avoid realloc()/memcpy() calls on these arrays than to be tight with memory
* allocations (and overallocating by 100% is no worse than what #GArray does
* internally with doubling its size every time it’s full).
*
* @n_properties is typically ≤ 8, so it’s
* (a) not much of an impact to overallocate
* (b) disproportionally subject to realloc()/memcpy() since the array size
* doubles 3 times in the first 8 elements
*
* gtk_builder_get_parameters() gets called twice for every object in every
* #GtkBuilder file, so it’s a fairly hot path. */
if (parameters)
*parameters = g_array_sized_new (FALSE, FALSE, sizeof (GParameter), n_properties);
if (filtered_parameters)
*filtered_parameters = g_array_sized_new (FALSE, FALSE, sizeof (GParameter), n_properties);
for (l = properties; l; l = l->next)
{
PropertyInfo *prop = (PropertyInfo*)l->data;
GParameter parameter = { NULL };
parameter.name = prop->pspec->name;
if (G_IS_PARAM_SPEC_OBJECT (prop->pspec) &&
(G_PARAM_SPEC_VALUE_TYPE (prop->pspec) != GDK_TYPE_PIXBUF) &&
(G_PARAM_SPEC_VALUE_TYPE (prop->pspec) != G_TYPE_FILE))
{
GObject *object = g_hash_table_lookup (builder->priv->objects,
prop->text->str);
if (object)
{
g_value_init (&parameter.value, G_OBJECT_TYPE (object));
g_value_set_object (&parameter.value, object);
}
else
{
if (prop->pspec->flags & G_PARAM_CONSTRUCT_ONLY)
{
g_warning ("Failed to get construct only property "
"%s of %s with value '%s'",
prop->pspec->name, object_name, prop->text->str);
continue;
}
/* Delay setting property */
property = g_slice_new (DelayedProperty);
property->pspec = prop->pspec;
property->object = g_strdup (object_name);
property->value = g_strdup (prop->text->str);
property->line = prop->line;
property->col = prop->col;
builder->priv->delayed_properties =
g_slist_prepend (builder->priv->delayed_properties, property);
continue;
}
}
else if (prop->bound && (!prop->text || prop->text->len == 0))
{
/* Ignore properties with a binding and no value since they are
* only there for to express the binding.
*/
continue;
}
else if (!gtk_builder_value_from_string (builder, prop->pspec,
prop->text->str, &parameter.value, &error))
{
g_warning ("Failed to set property %s.%s to %s: %s",
g_type_name (object_type), prop->pspec->name, prop->text->str,
error->message);
g_error_free (error);
error = NULL;
continue;
}
if (prop->pspec->flags & filter_flags)
{
if (filtered_parameters)
g_array_append_val (*filtered_parameters, parameter);
}
else
{
if (parameters)
g_array_append_val (*parameters, parameter);
}
}
}
static const gchar *
object_get_name (GObject *object)
{
if (GTK_IS_BUILDABLE (object))
return gtk_buildable_get_name (GTK_BUILDABLE (object));
else
return g_object_get_data (object, "gtk-builder-name");
}
static GObject *
gtk_builder_get_internal_child (GtkBuilder *builder,
ObjectInfo *info,
const gchar *childname,
GError **error)
{
GObject *obj = NULL;
while (!obj)
{
if (!info->parent)
break;
info = (ObjectInfo*)((ChildInfo*)info->parent)->parent;
if (!info)
break;
GTK_NOTE (BUILDER,
g_message ("Trying to get internal child %s from %s",
childname, object_get_name (info->object)));
if (GTK_IS_BUILDABLE (info->object))
obj = gtk_buildable_get_internal_child (GTK_BUILDABLE (info->object),
builder,
childname);
};
if (!obj)
{
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_INVALID_VALUE,
"Unknown internal child: %s", childname);
}
return obj;
}
static inline void
object_set_name (GObject *object,
const gchar *name)
{
if (GTK_IS_BUILDABLE (object))
gtk_buildable_set_name (GTK_BUILDABLE (object), name);
else
g_object_set_data_full (object, "gtk-builder-name", g_strdup (name), g_free);
}
void
_gtk_builder_add_object (GtkBuilder *builder,
const gchar *id,
GObject *object)
{
object_set_name (object, id);
g_hash_table_insert (builder->priv->objects, g_strdup (id), g_object_ref (object));
}
static void
gtk_builder_take_bindings (GtkBuilder *builder,
GObject *target,
GSList *bindings)
{
GSList *l;
for (l = bindings; l; l = l->next)
{
BindingInfo *info = l->data;
info->target = target;
}
builder->priv->bindings = g_slist_concat (builder->priv->bindings, bindings);
}
GObject *
_gtk_builder_construct (GtkBuilder *builder,
ObjectInfo *info,
GError **error)
{
GArray *parameters, *construct_parameters;
GObject *obj;
int i;
GtkBuildableIface *iface;
gboolean custom_set_property;
GtkBuildable *buildable;
GParamFlags param_filter_flags;
g_assert (info->type != G_TYPE_INVALID);
if (builder->priv->template_type != 0 &&
g_type_is_a (info->type, builder->priv->template_type))
{
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_OBJECT_TYPE_REFUSED,
"Refused to build object of type '%s' because it "
"conforms to the template type '%s', avoiding infinite recursion.",
g_type_name (info->type), g_type_name (builder->priv->template_type));
return NULL;
}
/* If there is a manual constructor (like UIManager), or if this is a
* reference to an internal child, then we filter out construct-only
* and warn that they cannot be set.
*
* Otherwise if we are calling g_object_newv(), we want to pass
* both G_PARAM_CONSTRUCT and G_PARAM_CONSTRUCT_ONLY to the
* object's constructor.
*
* Passing all construct properties to g_object_newv() slightly
* improves performance as the construct properties will only be set once.
*/
if (info->constructor ||
(info->parent && ((ChildInfo*)info->parent)->internal_child != NULL))
param_filter_flags = G_PARAM_CONSTRUCT_ONLY;
else
param_filter_flags = G_PARAM_CONSTRUCT | G_PARAM_CONSTRUCT_ONLY;
gtk_builder_get_parameters (builder, info->type,
info->id,
info->properties,
info->n_properties,
param_filter_flags,
&parameters,
&construct_parameters);
if (info->constructor)
{
GObject *constructor;
constructor = g_hash_table_lookup (builder->priv->objects, info->constructor);
if (constructor == NULL)
{
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_INVALID_VALUE,
"Unknown object constructor for %s: %s",
info->id,
info->constructor);
g_array_free (parameters, TRUE);
g_array_free (construct_parameters, TRUE);
return NULL;
}
obj = gtk_buildable_construct_child (GTK_BUILDABLE (constructor),
builder,
info->id);
g_assert (obj != NULL);
if (construct_parameters->len)
g_warning ("Can't pass in construct-only parameters to %s", info->id);
}
else if (info->parent && ((ChildInfo*)info->parent)->internal_child != NULL)
{
gchar *childname = ((ChildInfo*)info->parent)->internal_child;
obj = gtk_builder_get_internal_child (builder, info, childname, error);
if (!obj)
{
g_array_free (parameters, TRUE);
g_array_free (construct_parameters, TRUE);
return NULL;
}
if (construct_parameters->len)
g_warning ("Can't pass in construct-only parameters to %s", childname);
g_object_ref (obj);
}
else
{
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
obj = g_object_newv (info->type,
construct_parameters->len,
(GParameter *)construct_parameters->data);
G_GNUC_END_IGNORE_DEPRECATIONS
/* No matter what, make sure we have a reference.
*
* If it's an initially unowned object, sink it.
* If it's not initially unowned then we have the reference already.
*
* In the case that this is a window it will be sunk already and
* this is effectively a call to g_object_ref(). That's what
* we want.
*/
if (G_IS_INITIALLY_UNOWNED (obj))
g_object_ref_sink (obj);
GTK_NOTE (BUILDER,
g_message ("created %s of type %s", info->id, g_type_name (info->type)));
for (i = 0; i < construct_parameters->len; i++)
{
GParameter *param = &g_array_index (construct_parameters,
GParameter, i);
g_value_unset (&param->value);
}
}
g_array_free (construct_parameters, TRUE);
custom_set_property = FALSE;
buildable = NULL;
iface = NULL;
if (GTK_IS_BUILDABLE (obj))
{
buildable = GTK_BUILDABLE (obj);
iface = GTK_BUILDABLE_GET_IFACE (obj);
if (iface->set_buildable_property)
custom_set_property = TRUE;
}
/* We're going to set multiple properties in one go, so it's better
* to notify changes at the end
*/
g_object_freeze_notify (obj);
for (i = 0; i < parameters->len; i++)
{
GParameter *param = &g_array_index (parameters, GParameter, i);
if (custom_set_property)
iface->set_buildable_property (buildable, builder, param->name, &param->value);
else
g_object_set_property (obj, param->name, &param->value);
#ifdef G_ENABLE_DEBUG
if (GTK_DEBUG_CHECK (BUILDER))
{
gchar *str = g_strdup_value_contents ((const GValue*)&param->value);
g_message ("set %s: %s = %s", info->id, param->name, str);
g_free (str);
}
#endif
g_value_unset (&param->value);
}
g_object_thaw_notify (obj);
g_array_free (parameters, TRUE);
if (info->bindings)
gtk_builder_take_bindings (builder, obj, info->bindings);
/* put it in the hash table. */
_gtk_builder_add_object (builder, info->id, obj);
/* we already own a reference to obj. */
g_object_unref (obj);
return obj;
}
void
_gtk_builder_apply_properties (GtkBuilder *builder,
ObjectInfo *info,
GError **error)
{
GArray *parameters;
GtkBuildableIface *iface;
GtkBuildable *buildable;
gboolean custom_set_property;
gint i;
g_assert (info->object != NULL);
g_assert (info->type != G_TYPE_INVALID);
/* Fetch all properties that are not construct-only */
gtk_builder_get_parameters (builder, info->type,
info->id,
info->properties,
info->n_properties,
G_PARAM_CONSTRUCT_ONLY,
&parameters, NULL);
custom_set_property = FALSE;
buildable = NULL;
iface = NULL;
if (GTK_IS_BUILDABLE (info->object))
{
buildable = GTK_BUILDABLE (info->object);
iface = GTK_BUILDABLE_GET_IFACE (info->object);
if (iface->set_buildable_property)
custom_set_property = TRUE;
}
g_object_freeze_notify (info->object);
for (i = 0; i < parameters->len; i++)
{
GParameter *param = &g_array_index (parameters, GParameter, i);
if (custom_set_property)
iface->set_buildable_property (buildable, builder, param->name, &param->value);
else
g_object_set_property (info->object, param->name, &param->value);
#ifdef G_ENABLE_DEBUG
if (GTK_DEBUG_CHECK (BUILDER))
{
gchar *str = g_strdup_value_contents ((const GValue*)&param->value);
g_message ("set %s: %s = %s", info->id, param->name, str);
g_free (str);
}
#endif
g_value_unset (&param->value);
}
g_object_thaw_notify (info->object);
g_array_free (parameters, TRUE);
}
void
_gtk_builder_add (GtkBuilder *builder,
ChildInfo *child_info)
{
GObject *object;
GObject *parent;
/* Internal children are already added
* Also prevent us from being called twice.
*/
if (!child_info ||
child_info->internal_child ||
child_info->added)
return;
object = child_info->object;
if (!object)
return;
if (!child_info->parent)
{
g_warning ("%s: Not adding, No parent", object_get_name (object));
return;
}
g_assert (object != NULL);
parent = ((ObjectInfo*)child_info->parent)->object;
g_assert (GTK_IS_BUILDABLE (parent));
GTK_NOTE (BUILDER,
g_message ("adding %s to %s", object_get_name (object), object_get_name (parent)));
gtk_buildable_add_child (GTK_BUILDABLE (parent), builder, object,
child_info->type);
child_info->added = TRUE;
}
void
_gtk_builder_add_signals (GtkBuilder *builder,
GSList *signals)
{
builder->priv->signals = g_slist_concat (builder->priv->signals,
g_slist_copy (signals));
}
static void
gtk_builder_apply_delayed_properties (GtkBuilder *builder)
{
GSList *l, *props;
/* take the list over from the builder->priv.
*
* g_slist_reverse does not copy the list, so the list now
* belongs to us (and we free it at the end of this function).
*/
props = g_slist_reverse (builder->priv->delayed_properties);
builder->priv->delayed_properties = NULL;
for (l = props; l; l = l->next)
{
DelayedProperty *property = l->data;
GObject *object, *obj;
object = g_hash_table_lookup (builder->priv->objects, property->object);
g_assert (object != NULL);
obj = _gtk_builder_lookup_object (builder, property->value, property->line, property->col);
if (obj)
g_object_set (object, property->pspec->name, obj, NULL);
g_free (property->value);
g_free (property->object);
g_slice_free (DelayedProperty, property);
}
g_slist_free (props);
}
static inline void
free_binding_info (gpointer data,
gpointer user)
{
BindingInfo *info = data;
g_free (info->source);
g_free (info->source_property);
g_slice_free (BindingInfo, data);
}
static inline void
gtk_builder_create_bindings (GtkBuilder *builder)
{
GSList *l;
for (l = builder->priv->bindings; l; l = l->next)
{
BindingInfo *info = l->data;
GObject *source;
source = _gtk_builder_lookup_object (builder, info->source, info->line, info->col);
if (source)
g_object_bind_property (source, info->source_property,
info->target, info->target_pspec->name,
info->flags);
free_binding_info (info, NULL);
}
g_slist_free (builder->priv->bindings);
builder->priv->bindings = NULL;
}
void
_gtk_builder_finish (GtkBuilder *builder)
{
gtk_builder_apply_delayed_properties (builder);
gtk_builder_create_bindings (builder);
}
/**
* gtk_builder_new:
*
* Creates a new empty builder object.
*
* This function is only useful if you intend to make multiple calls
* to gtk_builder_add_from_file(), gtk_builder_add_from_resource()
* or gtk_builder_add_from_string() in order to merge multiple UI
* descriptions into a single builder.
*
* Most users will probably want to use gtk_builder_new_from_file(),
* gtk_builder_new_from_resource() or gtk_builder_new_from_string().
*
* Returns: a new (empty) #GtkBuilder object
*
* Since: 2.12
**/
GtkBuilder *
gtk_builder_new (void)
{
return g_object_new (GTK_TYPE_BUILDER, NULL);
}
/**
* gtk_builder_add_from_file:
* @builder: a #GtkBuilder
* @filename: the name of the file to parse
* @error: (allow-none): return location for an error, or %NULL
*
* Parses a file containing a [GtkBuilder UI definition][BUILDER-UI]
* and merges it with the current contents of @builder.
*
* Most users will probably want to use gtk_builder_new_from_file().
*
* If an error occurs, 0 will be returned and @error will be assigned a
* #GError from the #GTK_BUILDER_ERROR, #G_MARKUP_ERROR or #G_FILE_ERROR
* domain.
*
* It’s not really reasonable to attempt to handle failures of this
* call. You should not use this function with untrusted files (ie:
* files that are not part of your application). Broken #GtkBuilder
* files can easily crash your program, and it’s possible that memory
* was leaked leading up to the reported failure. The only reasonable
* thing to do when an error is detected is to call g_error().
*
* Returns: A positive value on success, 0 if an error occurred
*
* Since: 2.12
**/
guint
gtk_builder_add_from_file (GtkBuilder *builder,
const gchar *filename,
GError **error)
{
gchar *buffer;
gsize length;
GError *tmp_error;
g_return_val_if_fail (GTK_IS_BUILDER (builder), 0);
g_return_val_if_fail (filename != NULL, 0);
g_return_val_if_fail (error == NULL || *error == NULL, 0);
tmp_error = NULL;
if (!g_file_get_contents (filename, &buffer, &length, &tmp_error))
{
g_propagate_error (error, tmp_error);
return 0;
}
g_free (builder->priv->filename);
g_free (builder->priv->resource_prefix);
builder->priv->filename = g_strdup (filename);
builder->priv->resource_prefix = NULL;
_gtk_builder_parser_parse_buffer (builder, filename,
buffer, length,
NULL,
&tmp_error);
g_free (buffer);
if (tmp_error != NULL)
{
g_propagate_error (error, tmp_error);
return 0;
}
return 1;
}
/**
* gtk_builder_add_objects_from_file:
* @builder: a #GtkBuilder
* @filename: the name of the file to parse
* @object_ids: (array zero-terminated=1) (element-type utf8): nul-terminated array of objects to build
* @error: (allow-none): return location for an error, or %NULL
*
* Parses a file containing a [GtkBuilder UI definition][BUILDER-UI]
* building only the requested objects and merges
* them with the current contents of @builder.
*
* Upon errors 0 will be returned and @error will be assigned a
* #GError from the #GTK_BUILDER_ERROR, #G_MARKUP_ERROR or #G_FILE_ERROR
* domain.
*
* If you are adding an object that depends on an object that is not
* its child (for instance a #GtkTreeView that depends on its
* #GtkTreeModel), you have to explicitly list all of them in @object_ids.
*
* Returns: A positive value on success, 0 if an error occurred
*
* Since: 2.14
**/
guint
gtk_builder_add_objects_from_file (GtkBuilder *builder,
const gchar *filename,
gchar **object_ids,
GError **error)
{
gchar *buffer;
gsize length;
GError *tmp_error;
g_return_val_if_fail (GTK_IS_BUILDER (builder), 0);
g_return_val_if_fail (filename != NULL, 0);
g_return_val_if_fail (object_ids != NULL && object_ids[0] != NULL, 0);
g_return_val_if_fail (error == NULL || *error == NULL, 0);
tmp_error = NULL;
if (!g_file_get_contents (filename, &buffer, &length, &tmp_error))
{
g_propagate_error (error, tmp_error);
return 0;
}
g_free (builder->priv->filename);
g_free (builder->priv->resource_prefix);
builder->priv->filename = g_strdup (filename);
builder->priv->resource_prefix = NULL;
_gtk_builder_parser_parse_buffer (builder, filename,
buffer, length,
object_ids,
&tmp_error);
g_free (buffer);
if (tmp_error != NULL)
{
g_propagate_error (error, tmp_error);
return 0;
}
return 1;
}
/**
* gtk_builder_extend_with_template:
* @builder: a #GtkBuilder
* @widget: the widget that is being extended
* @template_type: the type that the template is for
* @buffer: the string to parse
* @length: the length of @buffer (may be -1 if @buffer is nul-terminated)
* @error: (allow-none): return location for an error, or %NULL
*
* Main private entry point for building composite container
* components from template XML.
*
* This is exported purely to let gtk-builder-tool validate
* templates, applications have no need to call this function.
*
* Returns: A positive value on success, 0 if an error occurred
*/
guint
gtk_builder_extend_with_template (GtkBuilder *builder,
GtkWidget *widget,
GType template_type,
const gchar *buffer,
gsize length,
GError **error)
{
GError *tmp_error;
g_return_val_if_fail (GTK_IS_BUILDER (builder), 0);
g_return_val_if_fail (GTK_IS_WIDGET (widget), 0);
g_return_val_if_fail (g_type_name (template_type) != NULL, 0);
g_return_val_if_fail (g_type_is_a (G_OBJECT_TYPE (widget), template_type), 0);
g_return_val_if_fail (buffer && buffer[0], 0);
tmp_error = NULL;
g_free (builder->priv->filename);
g_free (builder->priv->resource_prefix);
builder->priv->filename = g_strdup (".");
builder->priv->resource_prefix = NULL;
builder->priv->template_type = template_type;
gtk_builder_expose_object (builder, g_type_name (template_type), G_OBJECT (widget));
_gtk_builder_parser_parse_buffer (builder, "<input>",
buffer, length,
NULL,
&tmp_error);
if (tmp_error != NULL)
{
g_propagate_error (error, tmp_error);
return 0;
}
return 1;
}
/**
* gtk_builder_add_from_resource:
* @builder: a #GtkBuilder
* @resource_path: the path of the resource file to parse
* @error: (allow-none): return location for an error, or %NULL
*
* Parses a resource file containing a [GtkBuilder UI definition][BUILDER-UI]
* and merges it with the current contents of @builder.
*
* Most users will probably want to use gtk_builder_new_from_resource().
*
* If an error occurs, 0 will be returned and @error will be assigned a
* #GError from the #GTK_BUILDER_ERROR, #G_MARKUP_ERROR or #G_RESOURCE_ERROR
* domain.
*
* It’s not really reasonable to attempt to handle failures of this
* call. The only reasonable thing to do when an error is detected is
* to call g_error().
*
* Returns: A positive value on success, 0 if an error occurred
*
* Since: 3.4
**/
guint
gtk_builder_add_from_resource (GtkBuilder *builder,
const gchar *resource_path,
GError **error)
{
GError *tmp_error;
GBytes *data;
char *filename_for_errors;
char *slash;
g_return_val_if_fail (GTK_IS_BUILDER (builder), 0);
g_return_val_if_fail (resource_path != NULL, 0);
g_return_val_if_fail (error == NULL || *error == NULL, 0);
tmp_error = NULL;
data = g_resources_lookup_data (resource_path, 0, &tmp_error);
if (data == NULL)
{
g_propagate_error (error, tmp_error);
return 0;
}
g_free (builder->priv->filename);
g_free (builder->priv->resource_prefix);
builder->priv->filename = g_strdup (".");
slash = strrchr (resource_path, '/');
if (slash != NULL)
builder->priv->resource_prefix =
g_strndup (resource_path, slash - resource_path + 1);
else
builder->priv->resource_prefix =
g_strdup ("/");
filename_for_errors = g_strconcat ("<resource>", resource_path, NULL);
_gtk_builder_parser_parse_buffer (builder, filename_for_errors,
g_bytes_get_data (data, NULL), g_bytes_get_size (data),
NULL,
&tmp_error);
g_free (filename_for_errors);
g_bytes_unref (data);
if (tmp_error != NULL)
{
g_propagate_error (error, tmp_error);
return 0;
}
return 1;
}
/**
* gtk_builder_add_objects_from_resource:
* @builder: a #GtkBuilder
* @resource_path: the path of the resource file to parse
* @object_ids: (array zero-terminated=1) (element-type utf8): nul-terminated array of objects to build
* @error: (allow-none): return location for an error, or %NULL
*
* Parses a resource file containing a [GtkBuilder UI definition][BUILDER-UI]
* building only the requested objects and merges
* them with the current contents of @builder.
*
* Upon errors 0 will be returned and @error will be assigned a
* #GError from the #GTK_BUILDER_ERROR, #G_MARKUP_ERROR or #G_RESOURCE_ERROR
* domain.
*
* If you are adding an object that depends on an object that is not
* its child (for instance a #GtkTreeView that depends on its
* #GtkTreeModel), you have to explicitly list all of them in @object_ids.
*
* Returns: A positive value on success, 0 if an error occurred
*
* Since: 3.4
**/
guint
gtk_builder_add_objects_from_resource (GtkBuilder *builder,
const gchar *resource_path,
gchar **object_ids,
GError **error)
{
GError *tmp_error;
GBytes *data;
char *filename_for_errors;
char *slash;
g_return_val_if_fail (GTK_IS_BUILDER (builder), 0);
g_return_val_if_fail (resource_path != NULL, 0);
g_return_val_if_fail (object_ids != NULL && object_ids[0] != NULL, 0);
g_return_val_if_fail (error == NULL || *error == NULL, 0);
tmp_error = NULL;
data = g_resources_lookup_data (resource_path, 0, &tmp_error);
if (data == NULL)
{
g_propagate_error (error, tmp_error);
return 0;
}
g_free (builder->priv->filename);
g_free (builder->priv->resource_prefix);
builder->priv->filename = g_strdup (".");
slash = strrchr (resource_path, '/');
if (slash != NULL)
builder->priv->resource_prefix =
g_strndup (resource_path, slash - resource_path + 1);
else
builder->priv->resource_prefix =
g_strdup ("/");
filename_for_errors = g_strconcat ("<resource>", resource_path, NULL);
_gtk_builder_parser_parse_buffer (builder, filename_for_errors,
g_bytes_get_data (data, NULL), g_bytes_get_size (data),
object_ids,
&tmp_error);
g_free (filename_for_errors);
g_bytes_unref (data);
if (tmp_error != NULL)
{
g_propagate_error (error, tmp_error);
return 0;
}
return 1;
}
/**
* gtk_builder_add_from_string:
* @builder: a #GtkBuilder
* @buffer: the string to parse
* @length: the length of @buffer (may be -1 if @buffer is nul-terminated)
* @error: (allow-none): return location for an error, or %NULL
*
* Parses a string containing a [GtkBuilder UI definition][BUILDER-UI]
* and merges it with the current contents of @builder.
*
* Most users will probably want to use gtk_builder_new_from_string().
*
* Upon errors 0 will be returned and @error will be assigned a
* #GError from the #GTK_BUILDER_ERROR, #G_MARKUP_ERROR or
* #G_VARIANT_PARSE_ERROR domain.
*
* It’s not really reasonable to attempt to handle failures of this
* call. The only reasonable thing to do when an error is detected is
* to call g_error().
*
* Returns: A positive value on success, 0 if an error occurred
*
* Since: 2.12
**/
guint
gtk_builder_add_from_string (GtkBuilder *builder,
const gchar *buffer,
gsize length,
GError **error)
{
GError *tmp_error;
g_return_val_if_fail (GTK_IS_BUILDER (builder), 0);
g_return_val_if_fail (buffer != NULL, 0);
g_return_val_if_fail (error == NULL || *error == NULL, 0);
tmp_error = NULL;
g_free (builder->priv->filename);
g_free (builder->priv->resource_prefix);
builder->priv->filename = g_strdup (".");
builder->priv->resource_prefix = NULL;
_gtk_builder_parser_parse_buffer (builder, "<input>",
buffer, length,
NULL,
&tmp_error);
if (tmp_error != NULL)
{
g_propagate_error (error, tmp_error);
return 0;
}
return 1;
}
/**
* gtk_builder_add_objects_from_string:
* @builder: a #GtkBuilder
* @buffer: the string to parse
* @length: the length of @buffer (may be -1 if @buffer is nul-terminated)
* @object_ids: (array zero-terminated=1) (element-type utf8): nul-terminated array of objects to build
* @error: (allow-none): return location for an error, or %NULL
*
* Parses a string containing a [GtkBuilder UI definition][BUILDER-UI]
* building only the requested objects and merges
* them with the current contents of @builder.
*
* Upon errors 0 will be returned and @error will be assigned a
* #GError from the #GTK_BUILDER_ERROR or #G_MARKUP_ERROR domain.
*
* If you are adding an object that depends on an object that is not
* its child (for instance a #GtkTreeView that depends on its
* #GtkTreeModel), you have to explicitly list all of them in @object_ids.
*
* Returns: A positive value on success, 0 if an error occurred
*
* Since: 2.14
**/
guint
gtk_builder_add_objects_from_string (GtkBuilder *builder,
const gchar *buffer,
gsize length,
gchar **object_ids,
GError **error)
{
GError *tmp_error;
g_return_val_if_fail (GTK_IS_BUILDER (builder), 0);
g_return_val_if_fail (buffer != NULL, 0);
g_return_val_if_fail (object_ids != NULL && object_ids[0] != NULL, 0);
g_return_val_if_fail (error == NULL || *error == NULL, 0);
tmp_error = NULL;
g_free (builder->priv->filename);
g_free (builder->priv->resource_prefix);
builder->priv->filename = g_strdup (".");
builder->priv->resource_prefix = NULL;
_gtk_builder_parser_parse_buffer (builder, "<input>",
buffer, length,
object_ids,
&tmp_error);
if (tmp_error != NULL)
{
g_propagate_error (error, tmp_error);
return 0;
}
return 1;
}
/**
* gtk_builder_get_object:
* @builder: a #GtkBuilder
* @name: name of object to get
*
* Gets the object named @name. Note that this function does not
* increment the reference count of the returned object.
*
* Returns: (nullable) (transfer none): the object named @name or %NULL if
* it could not be found in the object tree.
*
* Since: 2.12
**/
GObject *
gtk_builder_get_object (GtkBuilder *builder,
const gchar *name)
{
g_return_val_if_fail (GTK_IS_BUILDER (builder), NULL);
g_return_val_if_fail (name != NULL, NULL);
return g_hash_table_lookup (builder->priv->objects, name);
}
/**
* gtk_builder_get_objects:
* @builder: a #GtkBuilder
*
* Gets all objects that have been constructed by @builder. Note that
* this function does not increment the reference counts of the returned
* objects.
*
* Returns: (element-type GObject) (transfer container): a newly-allocated #GSList containing all the objects
* constructed by the #GtkBuilder instance. It should be freed by
* g_slist_free()
*
* Since: 2.12
**/
GSList *
gtk_builder_get_objects (GtkBuilder *builder)
{
GSList *objects = NULL;
GObject *object;
GHashTableIter iter;
g_return_val_if_fail (GTK_IS_BUILDER (builder), NULL);
g_hash_table_iter_init (&iter, builder->priv->objects);
while (g_hash_table_iter_next (&iter, NULL, (gpointer *)&object))
objects = g_slist_prepend (objects, object);
return g_slist_reverse (objects);
}
/**
* gtk_builder_set_translation_domain:
* @builder: a #GtkBuilder
* @domain: (allow-none): the translation domain or %NULL
*
* Sets the translation domain of @builder.
* See #GtkBuilder:translation-domain.
*
* Since: 2.12
**/
void
gtk_builder_set_translation_domain (GtkBuilder *builder,
const gchar *domain)
{
gchar *new_domain;
g_return_if_fail (GTK_IS_BUILDER (builder));
new_domain = g_strdup (domain);
g_free (builder->priv->domain);
builder->priv->domain = new_domain;
g_object_notify_by_pspec (G_OBJECT (builder), builder_props[PROP_TRANSLATION_DOMAIN]);
}
/**
* gtk_builder_get_translation_domain:
* @builder: a #GtkBuilder
*
* Gets the translation domain of @builder.
*
* Returns: the translation domain. This string is owned
* by the builder object and must not be modified or freed.
*
* Since: 2.12
**/
const gchar *
gtk_builder_get_translation_domain (GtkBuilder *builder)
{
g_return_val_if_fail (GTK_IS_BUILDER (builder), NULL);
return builder->priv->domain;
}
/**
* gtk_builder_expose_object:
* @builder: a #GtkBuilder
* @name: the name of the object exposed to the builder
* @object: the object to expose
*
* Add @object to the @builder object pool so it can be referenced just like any
* other object built by builder.
*
* Since: 3.8
**/
void
gtk_builder_expose_object (GtkBuilder *builder,
const gchar *name,
GObject *object)
{
g_return_if_fail (GTK_IS_BUILDER (builder));
g_return_if_fail (name && name[0]);
g_return_if_fail (!g_hash_table_contains (builder->priv->objects, name));
object_set_name (object, name);
g_hash_table_insert (builder->priv->objects,
g_strdup (name),
g_object_ref (object));
}
typedef struct {
GModule *module;
gpointer data;
} ConnectArgs;
static void
gtk_builder_connect_signals_default (GtkBuilder *builder,
GObject *object,
const gchar *signal_name,
const gchar *handler_name,
GObject *connect_object,
GConnectFlags flags,
gpointer user_data)
{
GCallback func;
ConnectArgs *args = (ConnectArgs*) user_data;
func = gtk_builder_lookup_callback_symbol (builder, handler_name);
if (!func)
{
/* Only error out for missing GModule support if we've not
* found the symbols explicitly added with gtk_builder_add_callback_symbol()
*/
if (args->module == NULL)
g_error ("gtk_builder_connect_signals() requires working GModule");
if (!g_module_symbol (args->module, handler_name, (gpointer)&func))
{
g_warning ("Could not find signal handler '%s'. Did you compile with -rdynamic?", handler_name);
return;
}
}
if (connect_object)
g_signal_connect_object (object, signal_name, func, connect_object, flags);
else
g_signal_connect_data (object, signal_name, func, args->data, NULL, flags);
}
/**
* gtk_builder_connect_signals:
* @builder: a #GtkBuilder
* @user_data: user data to pass back with all signals
*
* This method is a simpler variation of gtk_builder_connect_signals_full().
* It uses symbols explicitly added to @builder with prior calls to
* gtk_builder_add_callback_symbol(). In the case that symbols are not
* explicitly added; it uses #GModule’s introspective features (by opening the module %NULL)
* to look at the application’s symbol table. From here it tries to match
* the signal handler names given in the interface description with
* symbols in the application and connects the signals. Note that this
* function can only be called once, subsequent calls will do nothing.
*
* Note that unless gtk_builder_add_callback_symbol() is called for
* all signal callbacks which are referenced by the loaded XML, this
* function will require that #GModule be supported on the platform.
*
* If you rely on #GModule support to lookup callbacks in the symbol table,
* the following details should be noted:
*
* When compiling applications for Windows, you must declare signal callbacks
* with #G_MODULE_EXPORT, or they will not be put in the symbol table.
* On Linux and Unices, this is not necessary; applications should instead
* be compiled with the -Wl,--export-dynamic CFLAGS, and linked against
* gmodule-export-2.0.
*
* Since: 2.12
**/
void
gtk_builder_connect_signals (GtkBuilder *builder,
gpointer user_data)
{
ConnectArgs args;
g_return_if_fail (GTK_IS_BUILDER (builder));
args.data = user_data;
if (g_module_supported ())
args.module = g_module_open (NULL, G_MODULE_BIND_LAZY);
else
args.module = NULL;
gtk_builder_connect_signals_full (builder,
gtk_builder_connect_signals_default,
&args);
if (args.module)
g_module_close (args.module);
}
/**
* GtkBuilderConnectFunc:
* @builder: a #GtkBuilder
* @object: object to connect a signal to
* @signal_name: name of the signal
* @handler_name: name of the handler
* @connect_object: (nullable): a #GObject, if non-%NULL, use g_signal_connect_object()
* @flags: #GConnectFlags to use
* @user_data: user data
*
* This is the signature of a function used to connect signals. It is used
* by the gtk_builder_connect_signals() and gtk_builder_connect_signals_full()
* methods. It is mainly intended for interpreted language bindings, but
* could be useful where the programmer wants more control over the signal
* connection process. Note that this function can only be called once,
* subsequent calls will do nothing.
*
* Since: 2.12
*/
/**
* gtk_builder_connect_signals_full:
* @builder: a #GtkBuilder
* @func: (scope call): the function used to connect the signals
* @user_data: arbitrary data that will be passed to the connection function
*
* This function can be thought of the interpreted language binding
* version of gtk_builder_connect_signals(), except that it does not
* require GModule to function correctly.
*
* Since: 2.12
*/
void
gtk_builder_connect_signals_full (GtkBuilder *builder,
GtkBuilderConnectFunc func,
gpointer user_data)
{
GSList *l;
GObject *object;
GObject *connect_object;
GString *detailed_id = NULL;
g_return_if_fail (GTK_IS_BUILDER (builder));
g_return_if_fail (func != NULL);
if (!builder->priv->signals)
return;
builder->priv->signals = g_slist_reverse (builder->priv->signals);
for (l = builder->priv->signals; l; l = l->next)
{
SignalInfo *signal = (SignalInfo*)l->data;
const gchar *signal_name;
g_assert (signal != NULL);
g_assert (signal->id != 0);
signal_name = g_signal_name (signal->id);
object = g_hash_table_lookup (builder->priv->objects,
signal->object_name);
g_assert (object != NULL);
connect_object = NULL;
if (signal->connect_object_name)
{
connect_object = g_hash_table_lookup (builder->priv->objects,
signal->connect_object_name);
if (!connect_object)
g_warning ("Could not lookup object %s on signal %s of object %s",
signal->connect_object_name, signal_name,
signal->object_name);
}
if (signal->detail)
{
if (detailed_id == NULL)
detailed_id = g_string_new ("");
g_string_printf (detailed_id, "%s::%s", signal_name,
g_quark_to_string (signal->detail));
signal_name = detailed_id->str;
}
func (builder, object, signal_name, signal->handler,
connect_object, signal->flags, user_data);
}
g_slist_free_full (builder->priv->signals, (GDestroyNotify)_free_signal_info);
builder->priv->signals = NULL;
if (detailed_id)
g_string_free (detailed_id, TRUE);
}
/**
* gtk_builder_value_from_string:
* @builder: a #GtkBuilder
* @pspec: the #GParamSpec for the property
* @string: the string representation of the value
* @value: (out): the #GValue to store the result in
* @error: (allow-none): return location for an error, or %NULL
*
* This function demarshals a value from a string. This function
* calls g_value_init() on the @value argument, so it need not be
* initialised beforehand.
*
* This function can handle char, uchar, boolean, int, uint, long,
* ulong, enum, flags, float, double, string, #GdkColor, #GdkRGBA and
* #GtkAdjustment type values. Support for #GtkWidget type values is
* still to come.
*
* Upon errors %FALSE will be returned and @error will be assigned a
* #GError from the #GTK_BUILDER_ERROR domain.
*
* Returns: %TRUE on success
*
* Since: 2.12
*/
gboolean
gtk_builder_value_from_string (GtkBuilder *builder,
GParamSpec *pspec,
const gchar *string,
GValue *value,
GError **error)
{
g_return_val_if_fail (GTK_IS_BUILDER (builder), FALSE);
g_return_val_if_fail (G_IS_PARAM_SPEC (pspec), FALSE);
g_return_val_if_fail (string != NULL, FALSE);
g_return_val_if_fail (value != NULL, FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
/*
* GParamSpecUnichar has the internal type G_TYPE_UINT,
* so we cannot handle this in the switch, do it separately
*/
if (G_IS_PARAM_SPEC_UNICHAR (pspec))
{
gunichar c;
g_value_init (value, G_TYPE_UINT);
c = g_utf8_get_char_validated (string, strlen (string));
if (c != 0 && c != (gunichar)-1 && c != (gunichar)-2)
g_value_set_uint (value, c);
return TRUE;
}
/*
* GParamSpecVariant can specify a GVariantType which can help with
* parsing, so we need to take care of that here.
*/
if (G_IS_PARAM_SPEC_VARIANT (pspec))
{
GParamSpecVariant *variant_pspec = G_PARAM_SPEC_VARIANT (pspec);
const GVariantType *type;
GVariant *variant;
g_value_init (value, G_TYPE_VARIANT);
/* The GVariant parser doesn't deal with indefinite types */
if (g_variant_type_is_definite (variant_pspec->type))
type = variant_pspec->type;
else
type = NULL;
variant = g_variant_parse (type, string, NULL, NULL, error);
if (variant == NULL)
return FALSE;
g_value_take_variant (value, variant);
return TRUE;
}
return gtk_builder_value_from_string_type (builder,
G_PARAM_SPEC_VALUE_TYPE (pspec),
string, value, error);
}
/**
* gtk_builder_value_from_string_type:
* @builder: a #GtkBuilder
* @type: the #GType of the value
* @string: the string representation of the value
* @value: (out): the #GValue to store the result in
* @error: (allow-none): return location for an error, or %NULL
*
* Like gtk_builder_value_from_string(), this function demarshals
* a value from a string, but takes a #GType instead of #GParamSpec.
* This function calls g_value_init() on the @value argument, so it
* need not be initialised beforehand.
*
* Upon errors %FALSE will be returned and @error will be assigned a
* #GError from the #GTK_BUILDER_ERROR domain.
*
* Returns: %TRUE on success
*
* Since: 2.12
*/
gboolean
gtk_builder_value_from_string_type (GtkBuilder *builder,
GType type,
const gchar *string,
GValue *value,
GError **error)
{
gboolean ret = TRUE;
g_return_val_if_fail (string != NULL, FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
g_value_init (value, type);
switch (G_TYPE_FUNDAMENTAL (type))
{
case G_TYPE_CHAR:
g_value_set_schar (value, string[0]);
break;
case G_TYPE_UCHAR:
g_value_set_uchar (value, (guchar)string[0]);
break;
case G_TYPE_BOOLEAN:
{
gboolean b;
if (!_gtk_builder_boolean_from_string (string, &b, error))
{
ret = FALSE;
break;
}
g_value_set_boolean (value, b);
break;
}
case G_TYPE_INT:
case G_TYPE_LONG:
case G_TYPE_INT64:
{
gint64 l;
gchar *endptr = NULL;
errno = 0;
l = g_ascii_strtoll (string, &endptr, 0);
if (errno || endptr == string)
{
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_INVALID_VALUE,
"Could not parse integer '%s'",
string);
ret = FALSE;
break;
}
if (G_VALUE_HOLDS_INT (value))
g_value_set_int (value, l);
else if (G_VALUE_HOLDS_LONG (value))
g_value_set_long (value, l);
else
g_value_set_int64 (value, l);
break;
}
case G_TYPE_UINT:
case G_TYPE_ULONG:
case G_TYPE_UINT64:
{
guint64 ul;
gchar *endptr = NULL;
errno = 0;
ul = g_ascii_strtoull (string, &endptr, 0);
if (errno || endptr == string)
{
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_INVALID_VALUE,
"Could not parse unsigned integer '%s'",
string);
ret = FALSE;
break;
}
if (G_VALUE_HOLDS_UINT (value))
g_value_set_uint (value, ul);
else if (G_VALUE_HOLDS_ULONG (value))
g_value_set_ulong (value, ul);
else
g_value_set_uint64 (value, ul);
break;
}
case G_TYPE_ENUM:
{
gint enum_value;
if (!_gtk_builder_enum_from_string (type, string, &enum_value, error))
{
ret = FALSE;
break;
}
g_value_set_enum (value, enum_value);
break;
}
case G_TYPE_FLAGS:
{
guint flags_value;
if (!_gtk_builder_flags_from_string (type, NULL, string, &flags_value, error))
{
ret = FALSE;
break;
}
g_value_set_flags (value, flags_value);
break;
}
case G_TYPE_FLOAT:
case G_TYPE_DOUBLE:
{
gdouble d;
gchar *endptr = NULL;
errno = 0;
d = g_ascii_strtod (string, &endptr);
if (errno || endptr == string)
{
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_INVALID_VALUE,
"Could not parse double '%s'",
string);
ret = FALSE;
break;
}
if (G_VALUE_HOLDS_FLOAT (value))
g_value_set_float (value, d);
else
g_value_set_double (value, d);
break;
}
case G_TYPE_STRING:
g_value_set_string (value, string);
break;
case G_TYPE_VARIANT:
{
GVariant *variant;
variant = g_variant_parse (NULL, string, NULL, NULL, error);
if (value != NULL)
g_value_take_variant (value, variant);
else
ret = FALSE;
}
break;
case G_TYPE_BOXED:
if (G_VALUE_HOLDS (value, g_type_from_name ("GdkColor")))
{
GdkColor color = { 0, };
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
if (gdk_color_parse (string, &color))
g_value_set_boxed (value, &color);
else
{
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_INVALID_VALUE,
"Could not parse color '%s'",
string);
ret = FALSE;
}
G_GNUC_END_IGNORE_DEPRECATIONS
}
else if (G_VALUE_HOLDS (value, GDK_TYPE_RGBA))
{
GdkRGBA rgba = { 0 };
if (gdk_rgba_parse (&rgba, string))
g_value_set_boxed (value, &rgba);
else
{
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_INVALID_VALUE,
"Could not parse RGBA color '%s'",
string);
ret = FALSE;
}
}
else if (G_VALUE_HOLDS (value, G_TYPE_STRV))
{
gchar **vector = g_strsplit (string, "\n", 0);
g_value_take_boxed (value, vector);
}
else
{
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_INVALID_VALUE,
"Could not parse '%s' as a %s",
string, G_VALUE_TYPE_NAME (value));
ret = FALSE;
}
break;
case G_TYPE_OBJECT:
case G_TYPE_INTERFACE:
if (G_VALUE_HOLDS (value, GDK_TYPE_PIXBUF))
{
gchar *filename;
GError *tmp_error = NULL;
GdkPixbuf *pixbuf = NULL;
if (g_hash_table_contains (builder->priv->objects, string))
{
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_INVALID_VALUE,
"Could not load image '%s': "
" '%s' is already used as object id",
string, string);
return FALSE;
}
filename = _gtk_builder_get_resource_path (builder, string);
if (filename != NULL)
{
GInputStream *stream = g_resources_open_stream (filename, 0, &tmp_error);
if (stream != NULL)
{
pixbuf = gdk_pixbuf_new_from_stream (stream, NULL, &tmp_error);
g_object_unref (stream);
}
}
else
{
filename = _gtk_builder_get_absolute_filename (builder, string);
pixbuf = gdk_pixbuf_new_from_file (filename, &tmp_error);
}
if (pixbuf == NULL)
{
GtkIconTheme *theme;
g_warning ("Could not load image '%s': %s",
string, tmp_error->message);
g_error_free (tmp_error);
/* fall back to a missing image */
theme = gtk_icon_theme_get_default ();
pixbuf = gtk_icon_theme_load_icon (theme,
"image-missing",
16,
GTK_ICON_LOOKUP_USE_BUILTIN,
NULL);
}
if (pixbuf)
{
g_value_set_object (value, pixbuf);
g_object_unref (G_OBJECT (pixbuf));
}
g_free (filename);
ret = TRUE;
}
else if (G_VALUE_HOLDS (value, G_TYPE_FILE))
{
GFile *file;
if (g_hash_table_contains (builder->priv->objects, string))
{
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_INVALID_VALUE,
"Could not create file '%s': "
" '%s' is already used as object id",
string, string);
return FALSE;
}
file = g_file_new_for_uri (string);
g_value_set_object (value, file);
g_object_unref (G_OBJECT (file));
ret = TRUE;
}
else
ret = FALSE;
break;
default:
ret = FALSE;
break;
}
/* Catch unassigned error for object types as well as any unsupported types.
* While parsing GtkBuilder; object types are deserialized
* without calling gtk_builder_value_from_string_type().
*/
if (!ret && error && *error == NULL)
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_INVALID_VALUE,
"Unsupported GType '%s'", g_type_name (type));
return ret;
}
gboolean
_gtk_builder_enum_from_string (GType type,
const gchar *string,
gint *enum_value,
GError **error)
{
GEnumClass *eclass;
GEnumValue *ev;
gchar *endptr;
gint value;
gboolean ret;
g_return_val_if_fail (G_TYPE_IS_ENUM (type), FALSE);
g_return_val_if_fail (string != NULL, FALSE);
ret = TRUE;
endptr = NULL;
errno = 0;
value = g_ascii_strtoull (string, &endptr, 0);
if (errno == 0 && endptr != string) /* parsed a number */
*enum_value = value;
else
{
eclass = g_type_class_ref (type);
ev = g_enum_get_value_by_name (eclass, string);
if (!ev)
ev = g_enum_get_value_by_nick (eclass, string);
if (ev)
*enum_value = ev->value;
else
{
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_INVALID_VALUE,
"Could not parse enum: '%s'",
string);
ret = FALSE;
}
g_type_class_unref (eclass);
}
return ret;
}
gboolean
_gtk_builder_flags_from_string (GType type,
GFlagsValue *aliases,
const gchar *string,
guint *flags_value,
GError **error)
{
GFlagsClass *fclass;
gchar *endptr, *prevptr;
guint i, j, k, value;
gchar *flagstr;
GFlagsValue *fv;
const gchar *flag;
gunichar ch;
gboolean eos, ret;
g_return_val_if_fail (G_TYPE_IS_FLAGS (type), FALSE);
g_return_val_if_fail (string != 0, FALSE);
ret = TRUE;
endptr = NULL;
errno = 0;
value = g_ascii_strtoull (string, &endptr, 0);
if (errno == 0 && endptr != string) /* parsed a number */
*flags_value = value;
else
{
fclass = g_type_class_ref (type);
flagstr = g_strdup (string);
for (value = i = j = 0; ; i++)
{
eos = flagstr[i] == '\0';
if (!eos && flagstr[i] != '|')
continue;
flag = &flagstr[j];
endptr = &flagstr[i];
if (!eos)
{
flagstr[i++] = '\0';
j = i;
}
/* trim spaces */
for (;;)
{
ch = g_utf8_get_char (flag);
if (!g_unichar_isspace (ch))
break;
flag = g_utf8_next_char (flag);
}
while (endptr > flag)
{
prevptr = g_utf8_prev_char (endptr);
ch = g_utf8_get_char (prevptr);
if (!g_unichar_isspace (ch))
break;
endptr = prevptr;
}
if (endptr > flag)
{
*endptr = '\0';
fv = NULL;
if (aliases)
{
for (k = 0; aliases[k].value_nick; k++)
{
if (g_ascii_strcasecmp (aliases[k].value_nick, flag) == 0)
{
fv = &aliases[k];
break;
}
}
}
if (!fv)
fv = g_flags_get_value_by_name (fclass, flag);
if (!fv)
fv = g_flags_get_value_by_nick (fclass, flag);
if (fv)
value |= fv->value;
else
{
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_INVALID_VALUE,
"Unknown flag: '%s'",
flag);
ret = FALSE;
break;
}
}
if (eos)
{
*flags_value = value;
break;
}
}
g_free (flagstr);
g_type_class_unref (fclass);
}
return ret;
}
gboolean
_gtk_builder_boolean_from_string (const gchar *string,
gboolean *value,
GError **error)
{
if (string[0] == '\0')
goto error;
else if (string[1] == '\0')
{
gchar c;
c = string[0];
if (c == '1' ||
c == 'y' || c == 't' ||
c == 'Y' || c == 'T')
*value = TRUE;
else if (c == '0' ||
c == 'n' || c == 'f' ||
c == 'N' || c == 'F')
*value = FALSE;
else
goto error;
}
else
{
if (g_ascii_strcasecmp (string, "true") == 0 ||
g_ascii_strcasecmp (string, "yes") == 0)
*value = TRUE;
else if (g_ascii_strcasecmp (string, "false") == 0 ||
g_ascii_strcasecmp (string, "no") == 0)
*value = FALSE;
else
goto error;
}
return TRUE;
error:
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_INVALID_VALUE,
"Could not parse boolean '%s'",
string);
return FALSE;
}
/**
* gtk_builder_get_type_from_name:
* @builder: a #GtkBuilder
* @type_name: type name to lookup
*
* Looks up a type by name, using the virtual function that
* #GtkBuilder has for that purpose. This is mainly used when
* implementing the #GtkBuildable interface on a type.
*
* Returns: the #GType found for @type_name or #G_TYPE_INVALID
* if no type was found
*
* Since: 2.12
*/
GType
gtk_builder_get_type_from_name (GtkBuilder *builder,
const gchar *type_name)
{
GType type;
g_return_val_if_fail (GTK_IS_BUILDER (builder), G_TYPE_INVALID);
g_return_val_if_fail (type_name != NULL, G_TYPE_INVALID);
type = GTK_BUILDER_GET_CLASS (builder)->get_type_from_name (builder, type_name);
if (G_TYPE_IS_CLASSED (type))
g_type_class_unref (g_type_class_ref (type));
return type;
}
GQuark
gtk_builder_error_quark (void)
{
return g_quark_from_static_string ("gtk-builder-error-quark");
}
gchar *
_gtk_builder_get_resource_path (GtkBuilder *builder, const gchar *string)
{
if (g_str_has_prefix (string, "resource:///"))
return g_uri_unescape_string (string + 11, "/");
if (g_path_is_absolute (string) ||
builder->priv->resource_prefix == NULL)
return NULL;
return g_build_path ("/", builder->priv->resource_prefix, string, NULL);
}
gchar *
_gtk_builder_get_absolute_filename (GtkBuilder *builder,
const gchar *string)
{
gchar *filename;
gchar *dirname = NULL;
if (g_path_is_absolute (string))
return g_strdup (string);
if (builder->priv->filename &&
strcmp (builder->priv->filename, ".") != 0)
{
dirname = g_path_get_dirname (builder->priv->filename);
if (strcmp (dirname, ".") == 0)
{
g_free (dirname);
dirname = g_get_current_dir ();
}
}
else
dirname = g_get_current_dir ();
filename = g_build_filename (dirname, string, NULL);
g_free (dirname);
return filename;
}
GType
_gtk_builder_get_template_type (GtkBuilder *builder)
{
return builder->priv->template_type;
}
/**
* gtk_builder_add_callback_symbol:
* @builder: a #GtkBuilder
* @callback_name: The name of the callback, as expected in the XML
* @callback_symbol: (scope async): The callback pointer
*
* Adds the @callback_symbol to the scope of @builder under the given @callback_name.
*
* Using this function overrides the behavior of gtk_builder_connect_signals()
* for any callback symbols that are added. Using this method allows for better
* encapsulation as it does not require that callback symbols be declared in
* the global namespace.
*
* Since: 3.10
*/
void
gtk_builder_add_callback_symbol (GtkBuilder *builder,
const gchar *callback_name,
GCallback callback_symbol)
{
g_return_if_fail (GTK_IS_BUILDER (builder));
g_return_if_fail (callback_name && callback_name[0]);
g_return_if_fail (callback_symbol != NULL);
if (!builder->priv->callbacks)
builder->priv->callbacks = g_hash_table_new_full (g_str_hash, g_str_equal,
g_free, NULL);
g_hash_table_insert (builder->priv->callbacks, g_strdup (callback_name), callback_symbol);
}
/**
* gtk_builder_add_callback_symbols:
* @builder: a #GtkBuilder
* @first_callback_name: The name of the callback, as expected in the XML
* @first_callback_symbol: (scope async): The callback pointer
* @...: A list of callback name and callback symbol pairs terminated with %NULL
*
* A convenience function to add many callbacks instead of calling
* gtk_builder_add_callback_symbol() for each symbol.
*
* Since: 3.10
*/
void
gtk_builder_add_callback_symbols (GtkBuilder *builder,
const gchar *first_callback_name,
GCallback first_callback_symbol,
...)
{
va_list var_args;
const gchar *callback_name;
GCallback callback_symbol;
g_return_if_fail (GTK_IS_BUILDER (builder));
g_return_if_fail (first_callback_name && first_callback_name[0]);
g_return_if_fail (first_callback_symbol != NULL);
callback_name = first_callback_name;
callback_symbol = first_callback_symbol;
va_start (var_args, first_callback_symbol);
do {
gtk_builder_add_callback_symbol (builder, callback_name, callback_symbol);
callback_name = va_arg (var_args, const gchar*);
if (callback_name)
callback_symbol = va_arg (var_args, GCallback);
} while (callback_name != NULL);
va_end (var_args);
}
/**
* gtk_builder_lookup_callback_symbol: (skip)
* @builder: a #GtkBuilder
* @callback_name: The name of the callback
*
* Fetches a symbol previously added to @builder
* with gtk_builder_add_callback_symbols()
*
* This function is intended for possible use in language bindings
* or for any case that one might be cusomizing signal connections
* using gtk_builder_connect_signals_full()
*
* Returns: (nullable): The callback symbol in @builder for @callback_name, or %NULL
*
* Since: 3.10
*/
GCallback
gtk_builder_lookup_callback_symbol (GtkBuilder *builder,
const gchar *callback_name)
{
g_return_val_if_fail (GTK_IS_BUILDER (builder), NULL);
g_return_val_if_fail (callback_name && callback_name[0], NULL);
if (!builder->priv->callbacks)
return NULL;
return g_hash_table_lookup (builder->priv->callbacks, callback_name);
}
/**
* gtk_builder_new_from_file:
* @filename: filename of user interface description file
*
* Builds the [GtkBuilder UI definition][BUILDER-UI]
* in the file @filename.
*
* If there is an error opening the file or parsing the description then
* the program will be aborted. You should only ever attempt to parse
* user interface descriptions that are shipped as part of your program.
*
* Returns: a #GtkBuilder containing the described interface
*
* Since: 3.10
**/
GtkBuilder *
gtk_builder_new_from_file (const gchar *filename)
{
GError *error = NULL;
GtkBuilder *builder;
builder = gtk_builder_new ();
if (!gtk_builder_add_from_file (builder, filename, &error))
g_error ("failed to add UI: %s", error->message);
return builder;
}
/**
* gtk_builder_new_from_resource:
* @resource_path: a #GResource resource path
*
* Builds the [GtkBuilder UI definition][BUILDER-UI]
* at @resource_path.
*
* If there is an error locating the resource or parsing the
* description, then the program will be aborted.
*
* Returns: a #GtkBuilder containing the described interface
*
* Since: 3.10
**/
GtkBuilder *
gtk_builder_new_from_resource (const gchar *resource_path)
{
GError *error = NULL;
GtkBuilder *builder;
builder = gtk_builder_new ();
if (!gtk_builder_add_from_resource (builder, resource_path, &error))
g_error ("failed to add UI: %s", error->message);
return builder;
}
/**
* gtk_builder_new_from_string:
* @string: a user interface (XML) description
* @length: the length of @string, or -1
*
* Builds the user interface described by @string (in the
* [GtkBuilder UI definition][BUILDER-UI] format).
*
* If @string is %NULL-terminated, then @length should be -1.
* If @length is not -1, then it is the length of @string.
*
* If there is an error parsing @string then the program will be
* aborted. You should not attempt to parse user interface description
* from untrusted sources.
*
* Returns: a #GtkBuilder containing the interface described by @string
*
* Since: 3.10
**/
GtkBuilder *
gtk_builder_new_from_string (const gchar *string,
gssize length)
{
GError *error = NULL;
GtkBuilder *builder;
builder = gtk_builder_new ();
if (!gtk_builder_add_from_string (builder, string, length, &error))
g_error ("failed to add UI: %s", error->message);
return builder;
}
/**
* gtk_builder_set_application:
* @builder: a #GtkBuilder
* @application: a #GtkApplication
*
* Sets the application associated with @builder.
*
* You only need this function if there is more than one #GApplication
* in your process. @application cannot be %NULL.
*
* Since: 3.10
**/
void
gtk_builder_set_application (GtkBuilder *builder,
GtkApplication *application)
{
g_return_if_fail (GTK_IS_BUILDER (builder));
g_return_if_fail (GTK_IS_APPLICATION (application));
if (builder->priv->application)
g_object_unref (builder->priv->application);
builder->priv->application = g_object_ref (application);
}
/**
* gtk_builder_get_application:
* @builder: a #GtkBuilder
*
* Gets the #GtkApplication associated with the builder.
*
* The #GtkApplication is used for creating action proxies as requested
* from XML that the builder is loading.
*
* By default, the builder uses the default application: the one from
* g_application_get_default(). If you want to use another application
* for constructing proxies, use gtk_builder_set_application().
*
* Returns: (nullable) (transfer none): the application being used by the builder,
* or %NULL
*
* Since: 3.10
**/
GtkApplication *
gtk_builder_get_application (GtkBuilder *builder)
{
g_return_val_if_fail (GTK_IS_BUILDER (builder), NULL);
if (!builder->priv->application)
{
GApplication *application;
application = g_application_get_default ();
if (application && GTK_IS_APPLICATION (application))
builder->priv->application = g_object_ref (GTK_APPLICATION (application));
}
return builder->priv->application;
}
/*< private >
* _gtk_builder_prefix_error:
* @builder: a #GtkBuilder
* @context: the #GMarkupParseContext
* @error: an error
*
* Calls g_prefix_error() to prepend a filename:line:column marker
* to the given error. The filename is taken from @builder, and
* the line and column are obtained by calling
* g_markup_parse_context_get_position().
*
* This is intended to be called on errors returned by
* g_markup_collect_attributes() in a start_element vfunc.
*/
void
_gtk_builder_prefix_error (GtkBuilder *builder,
GMarkupParseContext *context,
GError **error)
{
gint line, col;
g_markup_parse_context_get_position (context, &line, &col);
g_prefix_error (error, "%s:%d:%d ", builder->priv->filename, line, col);
}
/*< private >
* _gtk_builder_error_unhandled_tag:
* @builder: a #GtkBuilder
* @context: the #GMarkupParseContext
* @object: name of the object that is being handled
* @element_name: name of the element whose start tag is being handled
* @error: return location for the error
*
* Sets @error to a suitable error indicating that an @element_name
* tag is not expected in the custom markup for @object.
*
* This is intended to be called in a start_element vfunc.
*/
void
_gtk_builder_error_unhandled_tag (GtkBuilder *builder,
GMarkupParseContext *context,
const gchar *object,
const gchar *element_name,
GError **error)
{
gint line, col;
g_markup_parse_context_get_position (context, &line, &col);
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_UNHANDLED_TAG,
"%s:%d:%d Unsupported tag for %s: <%s>",
builder->priv->filename, line, col,
object, element_name);
}
/*< private >
* @builder: a #GtkBuilder
* @context: the #GMarkupParseContext
* @parent_name: the name of the expected parent element
* @error: return location for an error
*
* Checks that the parent element of the currently handled
* start tag is @parent_name and set @error if it isn't.
*
* This is intended to be called in start_element vfuncs to
* ensure that element nesting is as intended.
*
* Returns: %TRUE if @parent_name is the parent element
*/
gboolean
_gtk_builder_check_parent (GtkBuilder *builder,
GMarkupParseContext *context,
const gchar *parent_name,
GError **error)
{
const GSList *stack;
gint line, col;
const gchar *parent;
const gchar *element;
stack = g_markup_parse_context_get_element_stack (context);
element = (const gchar *)stack->data;
parent = stack->next ? (const gchar *)stack->next->data : "";
if (g_str_equal (parent_name, parent) ||
(g_str_equal (parent_name, "object") && g_str_equal (parent, "template")))
return TRUE;
g_markup_parse_context_get_position (context, &line, &col);
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_INVALID_TAG,
"%s:%d:%d Can't use <%s> here",
builder->priv->filename, line, col, element);
return FALSE;
}
/*< private >
* @builder: a #GtkBuilder
* @name: object name to look up
* @line: line number where @name was encountered
* @col: column number where @name was encountered
*
* Looks up an object by name. Similar to gtk_builder_get_object(),
* but sets an error if lookup fails during custom_tag_end,
* custom_finished or parser_finished vfuncs.
*
* The reason for doing things this way is that these vfuncs don't
* take a GError** parameter to return an error.
*
* Returns: the found object
*/
GObject *
_gtk_builder_lookup_object (GtkBuilder *builder,
const gchar *name,
gint line,
gint col)
{
GObject *obj;
GError *error = NULL;
obj = g_hash_table_lookup (builder->priv->objects, name);
error = (GError *) g_object_get_data (G_OBJECT (builder), "lookup-error");
if (!obj && !error)
{
g_set_error (&error,
GTK_BUILDER_ERROR, GTK_BUILDER_ERROR_INVALID_ID,
"%s:%d:%d Object with ID %s not found",
builder->priv->filename, line, col, name);
g_object_set_data_full (G_OBJECT (builder), "lookup-error",
error, (GDestroyNotify)g_error_free);
}
return obj;
}
/*< private >
* _gtk_builder_lookup_failed:
* @GtkBuilder: a #GtkBuilder
* @error: return location for error
*
* Finds whether any object lookups have failed.
*
* Returns: %TRUE if @error has been set
*/
gboolean
_gtk_builder_lookup_failed (GtkBuilder *builder,
GError **error)
{
GError *lookup_error;
lookup_error = (GError*) g_object_steal_data (G_OBJECT (builder), "lookup-error");
if (lookup_error)
{
g_propagate_error (error, lookup_error);
return TRUE;
}
return FALSE;
}
Reference in New Issue View Git Blame Copy Permalink