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gtk2/gtk/gtkbuilder.c
Tristan Van Berkom 1a088d3aba GtkBuilder: Fixed documentation 
The documentation was referring to an <external-object> tag
which we never implemented
2013-03-23 20:44:12 +09:00

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/* 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 pass a
* description to a GtkBuilder, call gtk_builder_add_from_file() or
* gtk_builder_add_from_string(). These functions can be called multiple
* times; the builder merges the content of all descriptions.
*
* 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.
*
* <refsect2 id="BUILDER-UI">
* <title>GtkBuilder UI Definitions</title>
* <para>
* 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 <firstterm>GtkBuilder UI definitions</firstterm>
* or just <firstterm>UI definitions</firstterm> if the context is clear. Do not
* confuse GtkBuilder UI Definitions with
* <link linkend="XML-UI">GtkUIManager UI Definitions</link>, which are more
* limited in scope. It is common to use <filename>.ui</filename> as the filename extension for files containing GtkBuilder UI definitions.
* </para>
* <programlisting>
* <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" parse="text" href="../../../../gtk/gtkbuilder.rnc">
* <xi:fallback>FIXME: MISSING XINCLUDE CONTENT</xi:fallback>
* </xi:include>
* </programlisting>
* <para>
* The toplevel element is &lt;interface&gt;. 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
* &lt;object&gt; elements, which can contain &lt;property&gt; elements to set
* properties, &lt;signal&gt; elements which connect signals to handlers, and
* &lt;child&gt; 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 &lt;child&gt; element contains an &lt;object&gt; element which
* describes the child object. The target toolkit version(s) are described by
* &lt;requires&gt; 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
* "&lt;major&gt;.&lt;minor&gt;". The builder will error out if the version
* requirements are not met.
*
* Typically, the specific kind of object represented by an &lt;object&gt;
* element is specified by the "class" attribute. If the type has not been
* loaded yet, GTK+ tries to find the <function>_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
* <function>_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 must 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.
* </para>
* <note><para>
* Prior to 2.20, GtkBuilder was setting the "name" property of constructed widgets to the
* "id" attribute. In GTK+ 2.20 or newer, you have to use gtk_buildable_get_name() instead
* of gtk_widget_get_name() to obtain the "id", or set the "name" property in your UI
* definition.
* </para></note>
* <para>
* Setting properties of objects is pretty straightforward with the
* &lt;property&gt; 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_color_parse()). 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 &mdash 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.
*
* Signal handlers are set up with the &lt;signal&gt; 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" propery of the &lt;child&gt; element
* to a true value. Note that GtkBuilder still requires an &lt;object&gt;
* 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 &lt;child&gt;. The possible values
* for the "type" attribute are described in the sections describing the
* widget-specific portions of UI definitions.
* </para>
* <example>
* <title>A GtkBuilder UI Definition</title>
* <programlisting><![CDATA[
* <interface>
* <object class="GtkDialog" id="dialog1">
* <child internal-child="vbox">
* <object class="GtkVBox" id="vbox1">
* <property name="border-width">10</property>
* <child internal-child="action_area">
* <object class="GtkHButtonBox" 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>
* ]]></programlisting>
* </example>
* <para>
* 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 &lt;child&gt; element gets parsed by the custom tag
* handler of the parent object, while a custom element in an &lt;object&gt;
* element gets parsed by the custom tag handler of the object.
*
* These XML fragments are explained in the documentation of the respective
* objects, see
* <link linkend="GtkWidget-BUILDER-UI">GtkWidget</link>,
* <link linkend="GtkLabel-BUILDER-UI">GtkLabel</link>,
* <link linkend="GtkWindow-BUILDER-UI">GtkWindow</link>,
* <link linkend="GtkContainer-BUILDER-UI">GtkContainer</link>,
* <link linkend="GtkDialog-BUILDER-UI">GtkDialog</link>,
* <link linkend="GtkCellLayout-BUILDER-UI">GtkCellLayout</link>,
* <link linkend="GtkColorSelectionDialog-BUILDER-UI">GtkColorSelectionDialog</link>,
* <link linkend="GtkFontSelectionDialog-BUILDER-UI">GtkFontSelectionDialog</link>,
* <link linkend="GtkExpander-BUILDER-UI">GtkExpander</link>,
* <link linkend="GtkFrame-BUILDER-UI">GtkFrame</link>,
* <link linkend="GtkListStore-BUILDER-UI">GtkListStore</link>,
* <link linkend="GtkTreeStore-BUILDER-UI">GtkTreeStore</link>,
* <link linkend="GtkNotebook-BUILDER-UI">GtkNotebook</link>,
* <link linkend="GtkSizeGroup-BUILDER-UI">GtkSizeGroup</link>,
* <link linkend="GtkTreeView-BUILDER-UI">GtkTreeView</link>,
* <link linkend="GtkUIManager-BUILDER-UI">GtkUIManager</link>,
* <link linkend="GtkActionGroup-BUILDER-UI">GtkActionGroup</link>.
* <link linkend="GtkMenuItem-BUILDER-UI">GtkMenuItem</link>,
* <link linkend="GtkMenuToolButton-BUILDER-UI">GtkMenuToolButton</link>,
* <link linkend="GtkAssistant-BUILDER-UI">GtkAssistant</link>,
* <link linkend="GtkScale-BUILDER-UI">GtkScale</link>,
* <link linkend="GtkComboBoxText-BUILDER-UI">GtkComboBoxText</link>,
* <link linkend="GtkRecentFilter-BUILDER-UI">GtkRecentFilter</link>,
* <link linkend="GtkFileFilter-BUILDER-UI">GtkFileFilter</link>,
* <link linkend="GtkTextTagTable-BUILDER-UI">GtkTextTagTable</link>.
* </para>
* </refsect2>
* <refsect2>
* <title>Embedding other XML</title>
* <para>
* Apart from the language for UI descriptions that has been explained
* in the previous section, GtkBuilder can also parse XML fragments
* of <link linkend="gio-GMenu-Markup">GMenu markup</link>. The resulting
* #GMenu object and its named submenus are available via
* gtk_builder_get_object() like other constructed objects.
* </para>
* </refsect2>
*/
#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 "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,
};
struct _GtkBuilderPrivate
{
gchar *domain;
GHashTable *objects;
GSList *delayed_properties;
GSList *signals;
gchar *filename;
gchar *resource_prefix;
};
G_DEFINE_TYPE (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
*/
g_object_class_install_property (gobject_class,
PROP_TRANSLATION_DOMAIN,
g_param_spec_string ("translation-domain",
P_("Translation Domain"),
P_("The translation domain used by gettext"),
NULL,
GTK_PARAM_READWRITE));
g_type_class_add_private (gobject_class, sizeof (GtkBuilderPrivate));
}
static void
gtk_builder_init (GtkBuilder *builder)
{
builder->priv = G_TYPE_INSTANCE_GET_PRIVATE (builder, GTK_TYPE_BUILDER,
GtkBuilderPrivate);
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);
g_slist_foreach (priv->signals, (GFunc) _free_signal_info, NULL);
g_slist_free (priv->signals);
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
*
*/
static GType
_gtk_builder_resolve_type_lazily (const gchar *name)
{
static GModule *module = NULL;
GTypeGetFunc func;
GString *symbol_name = g_string_new ("");
char c, *symbol;
int i;
GType gtype = G_TYPE_INVALID;
if (!module)
module = g_module_open (NULL, 0);
for (i = 0; name[i] != '\0'; i++)
{
c = name[i];
/* skip if uppercase, first or previous is uppercase */
if ((c == g_ascii_toupper (c) &&
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 (c));
}
g_string_append (symbol_name, "_get_type");
symbol = g_string_free (symbol_name, FALSE);
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;
return _gtk_builder_resolve_type_lazily (type_name);
}
typedef struct
{
gchar *object;
gchar *name;
gchar *value;
} DelayedProperty;
static void
gtk_builder_get_parameters (GtkBuilder *builder,
GType object_type,
const gchar *object_name,
GSList *properties,
GArray **parameters,
GArray **construct_parameters)
{
GSList *l;
GParamSpec *pspec;
GObjectClass *oclass;
DelayedProperty *property;
GError *error = NULL;
oclass = g_type_class_ref (object_type);
g_assert (oclass != NULL);
*parameters = g_array_new (FALSE, FALSE, sizeof (GParameter));
*construct_parameters = g_array_new (FALSE, FALSE, sizeof (GParameter));
for (l = properties; l; l = l->next)
{
PropertyInfo *prop = (PropertyInfo*)l->data;
GParameter parameter = { NULL };
pspec = g_object_class_find_property (G_OBJECT_CLASS (oclass),
prop->name);
if (!pspec)
{
g_warning ("Unknown property: %s.%s",
g_type_name (object_type), prop->name);
continue;
}
parameter.name = prop->name;
if (G_IS_PARAM_SPEC_OBJECT (pspec) &&
(G_PARAM_SPEC_VALUE_TYPE (pspec) != GDK_TYPE_PIXBUF))
{
GObject *object = gtk_builder_get_object (builder, prop->data);
if (object)
{
g_value_init (&parameter.value, G_OBJECT_TYPE (object));
g_value_set_object (&parameter.value, object);
}
else
{
if (pspec->flags & G_PARAM_CONSTRUCT_ONLY)
{
g_warning ("Failed to get constuct only property "
"%s of %s with value `%s'",
prop->name, object_name, prop->data);
continue;
}
/* Delay setting property */
property = g_slice_new (DelayedProperty);
property->object = g_strdup (object_name);
property->name = g_strdup (prop->name);
property->value = g_strdup (prop->data);
builder->priv->delayed_properties =
g_slist_prepend (builder->priv->delayed_properties, property);
continue;
}
}
else if (!gtk_builder_value_from_string (builder, pspec,
prop->data, &parameter.value, &error))
{
g_warning ("Failed to set property %s.%s to %s: %s",
g_type_name (object_type), prop->name, prop->data,
error->message);
g_error_free (error);
error = NULL;
continue;
}
if (pspec->flags & (G_PARAM_CONSTRUCT | G_PARAM_CONSTRUCT_ONLY))
g_array_append_val (*construct_parameters, parameter);
else
g_array_append_val (*parameters, parameter);
}
g_type_class_unref (oclass);
}
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_print ("Trying to get internal child %s from %s\n",
childname,
gtk_buildable_get_name (GTK_BUILDABLE (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));
}
GObject *
_gtk_builder_construct (GtkBuilder *builder,
ObjectInfo *info,
GError **error)
{
GArray *parameters, *construct_parameters;
GType object_type;
GObject *obj;
int i;
GtkBuildableIface *iface;
gboolean custom_set_property;
GtkBuildable *buildable;
g_assert (info->class_name != NULL);
object_type = gtk_builder_get_type_from_name (builder, info->class_name);
if (object_type == G_TYPE_INVALID)
{
g_set_error (error,
GTK_BUILDER_ERROR,
GTK_BUILDER_ERROR_INVALID_VALUE,
"Invalid object type `%s'",
info->class_name);
return NULL;
}
gtk_builder_get_parameters (builder, object_type,
info->id,
info->properties,
&parameters,
&construct_parameters);
if (info->constructor)
{
GObject *constructor;
constructor = gtk_builder_get_object (builder, 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
{
obj = g_object_newv (object_type,
construct_parameters->len,
(GParameter *)construct_parameters->data);
/* 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_print ("created %s of type %s\n", info->id, info->class_name));
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;
}
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);
#if G_ENABLE_DEBUG
if (gtk_get_debug_flags () & GTK_DEBUG_BUILDER)
{
gchar *str = g_strdup_value_contents ((const GValue*)&param->value);
g_print ("set %s: %s = %s\n", info->id, param->name, str);
g_free (str);
}
#endif
g_value_unset (&param->value);
}
g_array_free (parameters, TRUE);
/* 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_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",
gtk_buildable_get_name (GTK_BUILDABLE (object)));
return;
}
g_assert (object != NULL);
parent = ((ObjectInfo*)child_info->parent)->object;
g_assert (GTK_IS_BUILDABLE (parent));
GTK_NOTE (BUILDER,
g_print ("adding %s to %s\n",
gtk_buildable_get_name (GTK_BUILDABLE (object)),
gtk_buildable_get_name (GTK_BUILDABLE (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;
DelayedProperty *property;
GObject *object;
GType object_type;
GObjectClass *oclass;
GParamSpec *pspec;
/* 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)
{
property = (DelayedProperty*)l->data;
object = g_hash_table_lookup (builder->priv->objects, property->object);
g_assert (object != NULL);
object_type = G_OBJECT_TYPE (object);
g_assert (object_type != G_TYPE_INVALID);
oclass = g_type_class_ref (object_type);
g_assert (oclass != NULL);
pspec = g_object_class_find_property (G_OBJECT_CLASS (oclass),
property->name);
if (!pspec)
g_warning ("Unknown property: %s.%s", g_type_name (object_type),
property->name);
else
{
GObject *obj;
obj = g_hash_table_lookup (builder->priv->objects, property->value);
if (!obj)
g_warning ("No object called: %s", property->value);
else
g_object_set (object, property->name, obj, NULL);
}
g_free (property->value);
g_free (property->object);
g_free (property->name);
g_slice_free (DelayedProperty, property);
g_type_class_unref (oclass);
}
g_slist_free (props);
}
void
_gtk_builder_finish (GtkBuilder *builder)
{
gtk_builder_apply_delayed_properties (builder);
}
/**
* gtk_builder_new:
*
* Creates a new builder object.
*
* Return value: a new #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 <link linkend="BUILDER-UI">GtkBuilder
* UI definition</link> and merges it 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.
*
* 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 <link linkend="BUILDER-UI">GtkBuilder
* UI definition</link> 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.
*
* <note><para>
* 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 explicitely list all of them in @object_ids.
* </para></note>
*
* 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_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 <link linkend="BUILDER-UI">GtkBuilder
* UI definition</link> and merges it 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.
*
* 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 <link linkend="BUILDER-UI">GtkBuilder
* UI definition</link> 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.
*
* <note><para>
* 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 explicitely list all of them in @object_ids.
* </para></note>
*
* 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 <link linkend="BUILDER-UI">GtkBuilder
* UI definition</link> and merges it 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.
*
* 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 <link linkend="BUILDER-UI">GtkBuilder
* UI definition</link> 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.
*
* <note><para>
* 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 explicitely list all of them in @object_ids.
* </para></note>
*
* 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.
*
* Return value: (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);
}
static void
object_add_to_list (gchar *object_id,
GObject *object,
GSList **list)
{
*list = g_slist_prepend (*list, object);
}
/**
* 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.
*
* Return value: (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;
g_return_val_if_fail (GTK_IS_BUILDER (builder), NULL);
g_hash_table_foreach (builder->priv->objects, (GHFunc)object_add_to_list, &objects);
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 (G_OBJECT (builder), "translation-domain");
}
/**
* gtk_builder_get_translation_domain:
* @builder: a #GtkBuilder
*
* Gets the translation domain of @builder.
*
* Return value: 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 (gtk_builder_get_object (builder, name) == NULL);
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;
} connect_args;
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;
connect_args *args = (connect_args*)user_data;
if (!g_module_symbol (args->module, handler_name, (gpointer)&func))
{
g_warning ("Could not find signal handler '%s'", 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: a pointer to a structure sent in as user data to all signals
*
* This method is a simpler variation of gtk_builder_connect_signals_full().
* 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 this function will not work correctly if #GModule is not
* supported on the platform.
*
* 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)
{
connect_args *args;
g_return_if_fail (GTK_IS_BUILDER (builder));
if (!g_module_supported ())
g_error ("gtk_builder_connect_signals() requires working GModule");
args = g_slice_new0 (connect_args);
args->module = g_module_open (NULL, G_MODULE_BIND_LAZY);
args->data = user_data;
gtk_builder_connect_signals_full (builder,
gtk_builder_connect_signals_default,
args);
g_module_close (args->module);
g_slice_free (connect_args, args);
}
/**
* 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: 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;
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;
g_assert (signal != NULL);
g_assert (signal->name != NULL);
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);
}
func (builder, object, signal->name, signal->handler,
connect_object, signal->flags, user_data);
}
g_slist_foreach (builder->priv->signals, (GFunc)_free_signal_info, NULL);
g_slist_free (builder->priv->signals);
builder->priv->signals = NULL;
}
/**
* 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)
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 (type != G_TYPE_INVALID, FALSE);
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:
{
long 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
g_value_set_long (value, l);
break;
}
case G_TYPE_UINT:
case G_TYPE_ULONG:
{
gulong 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
g_value_set_ulong (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, 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, GDK_TYPE_COLOR))
{
GdkColor color = { 0, };
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;
}
}
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:
if (G_VALUE_HOLDS (value, GDK_TYPE_PIXBUF))
{
gchar *filename;
GError *tmp_error = NULL;
GdkPixbuf *pixbuf = NULL;
if (gtk_builder_get_object (builder, 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,
GTK_STOCK_MISSING_IMAGE,
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
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,
const gchar *string,
guint *flags_value,
GError **error)
{
GFlagsClass *fclass;
gchar *endptr, *prevptr;
guint i, j, 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 = 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;
}
/**
* 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)
{
g_return_val_if_fail (GTK_IS_BUILDER (builder), G_TYPE_INVALID);
g_return_val_if_fail (type_name != NULL, G_TYPE_INVALID);
return GTK_BUILDER_GET_CLASS (builder)->get_type_from_name (builder, type_name);
}
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;
}
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