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266 lines
12 KiB
C
266 lines
12 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 2006-2007 Async Open Source,
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* Johan Dahlin <jdahlin@async.com.br>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __GTK_BUILDABLE_H__
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#define __GTK_BUILDABLE_H__
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#if !defined (__GTK_H_INSIDE__) && !defined (GTK_COMPILATION)
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#error "Only <gtk/gtk.h> can be included directly."
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#endif
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#include <gtk/gtkbuilder.h>
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G_BEGIN_DECLS
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#define GTK_TYPE_BUILDABLE (gtk_buildable_get_type ())
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#define GTK_BUILDABLE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_BUILDABLE, GtkBuildable))
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#define GTK_IS_BUILDABLE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_BUILDABLE))
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#define GTK_BUILDABLE_GET_IFACE(obj) (G_TYPE_INSTANCE_GET_INTERFACE ((obj), GTK_TYPE_BUILDABLE, GtkBuildableIface))
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typedef struct _GtkBuildable GtkBuildable; /* Dummy typedef */
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typedef struct _GtkBuildableIface GtkBuildableIface;
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typedef struct _GtkBuildableParseContext GtkBuildableParseContext;
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typedef struct _GtkBuildableParser GtkBuildableParser;
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/**
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* GtkBuildableParseContext:
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*
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* An opaque context struct for `GtkBuildableParser`.
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*/
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/**
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* GtkBuildableParser:
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* @start_element: function called for open elements
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* @end_element: function called for close elements
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* @text: function called for character data
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* @error: function called on error
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*
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* A sub-parser for `GtkBuildable` implementations.
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*/
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struct _GtkBuildableParser
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{
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/* Called for open tags <foo bar="baz"> */
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void (*start_element) (GtkBuildableParseContext *context,
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const char *element_name,
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const char **attribute_names,
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const char **attribute_values,
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gpointer user_data,
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GError **error);
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/* Called for close tags </foo> */
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void (*end_element) (GtkBuildableParseContext *context,
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const char *element_name,
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gpointer user_data,
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GError **error);
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/* Called for character data */
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/* text is not nul-terminated */
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void (*text) (GtkBuildableParseContext *context,
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const char *text,
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gsize text_len,
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gpointer user_data,
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GError **error);
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/* Called on error, including one set by other
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* methods in the vtable. The GError should not be freed.
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*/
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void (*error) (GtkBuildableParseContext *context,
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GError *error,
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gpointer user_data);
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/*< private >*/
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gpointer padding[4];
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};
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/**
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* GtkBuildableIface:
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* @g_iface: the parent class
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* @set_id: Stores the id attribute given in the `GtkBuilder` UI definition.
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* `GtkWidget` stores the name as object data. Implement this method if your
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* object has some notion of “ID” and it makes sense to map the XML id
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* attribute to it.
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* @get_id: The getter corresponding to @set_id. Implement this
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* if you implement @set_id.
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* @add_child: Adds a child. The @type parameter can be used to
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* differentiate the kind of child. `GtkWidget` implements this
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* to add event controllers to the widget, `GtkNotebook` uses
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* the @type to distinguish between page labels (of type "page-label")
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* and normal children.
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* @set_buildable_property: Sets a property of a buildable object.
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* It is normally not necessary to implement this, g_object_set_property()
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* is used by default. `GtkWindow` implements this to delay showing itself
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* (i.e. setting the [property@GtkWidget:visible] property) until the whole
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* interface is created.
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* @construct_child: Constructs a child of a buildable that has been
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* specified as “constructor” in the UI definition. This can be used to
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* reference a widget created in a <ui> tag which is outside
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* of the normal GtkBuilder UI definition hierarchy. A reference to the
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* constructed object is returned and becomes owned by the caller.
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* @custom_tag_start: Implement this if the buildable needs to parse
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* content below <child>. To handle an element, the implementation
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* must fill in the @parser and @user_data and return %TRUE.
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* `GtkWidget` implements this to parse accessible attributes specified
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* in <accessibility> elements.
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* Note that @user_data must be freed in @custom_tag_end or @custom_finished.
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* @custom_tag_end: Called for the end tag of each custom element that is
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* handled by the buildable (see @custom_tag_start).
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* @custom_finished: Called for each custom tag handled by the buildable
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* when the builder finishes parsing (see @custom_tag_start)
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* @parser_finished: Called when a builder finishes the parsing
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* of a UI definition. It is normally not necessary to implement this,
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* unless you need to perform special cleanup actions. `GtkWindow` sets
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* the `GtkWidget:visible` property here.
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* @get_internal_child: Returns an internal child of a buildable.
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* `GtkDialog` implements this to give access to its @vbox, making
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* it possible to add children to the vbox in a UI definition.
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* Implement this if the buildable has internal children that may
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* need to be accessed from a UI definition.
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*
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* The `GtkBuildableIface` interface contains methods that are
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* necessary to allow `GtkBuilder` to construct an object from
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* a `GtkBuilder` UI definition.
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*/
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struct _GtkBuildableIface
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{
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GTypeInterface g_iface;
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/* virtual table */
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void (* set_id) (GtkBuildable *buildable,
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const char *id);
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const char * (* get_id) (GtkBuildable *buildable);
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/**
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* GtkBuildableIface::add_child:
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* @buildable: a `GtkBuildable`
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* @builder: a `GtkBuilder`
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* @child: child to add
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* @type: (nullable): kind of child or %NULL
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*
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* Adds a child to @buildable. @type is an optional string
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* describing how the child should be added.
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*/
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void (* add_child) (GtkBuildable *buildable,
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GtkBuilder *builder,
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GObject *child,
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const char *type);
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void (* set_buildable_property) (GtkBuildable *buildable,
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GtkBuilder *builder,
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const char *name,
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const GValue *value);
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GObject * (* construct_child) (GtkBuildable *buildable,
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GtkBuilder *builder,
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const char *name);
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/**
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* GtkBuildableIface::custom_tag_start:
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* @buildable: a `GtkBuildable`
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* @builder: a `GtkBuilder` used to construct this object
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* @child: (nullable): child object or %NULL for non-child tags
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* @tagname: name of tag
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* @parser: (out): a `GtkBuildableParser` to fill in
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* @data: (out): return location for user data that will be passed in
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* to parser functions
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*
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* Called for each unknown element under `<child>`.
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*
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* Returns: %TRUE if an object has a custom implementation, %FALSE
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* if it doesn't.
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*/
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gboolean (* custom_tag_start) (GtkBuildable *buildable,
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GtkBuilder *builder,
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GObject *child,
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const char *tagname,
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GtkBuildableParser *parser,
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gpointer *data);
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/**
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* GtkBuildableIface::custom_tag_end:
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* @buildable: A `GtkBuildable`
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* @builder: `GtkBuilder` used to construct this object
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* @child: (nullable): child object or %NULL for non-child tags
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* @tagname: name of tag
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* @data: user data that will be passed in to parser functions
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*
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* Called at the end of each custom element handled by
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* the buildable.
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*/
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void (* custom_tag_end) (GtkBuildable *buildable,
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GtkBuilder *builder,
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GObject *child,
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const char *tagname,
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gpointer data);
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/**
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* GtkBuildableIface::custom_finished:
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* @buildable: a `GtkBuildable`
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* @builder: a `GtkBuilder`
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* @child: (nullable): child object or %NULL for non-child tags
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* @tagname: the name of the tag
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* @data: user data created in custom_tag_start
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*
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* Similar to gtk_buildable_parser_finished() but is
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* called once for each custom tag handled by the @buildable.
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*/
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void (* custom_finished) (GtkBuildable *buildable,
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GtkBuilder *builder,
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GObject *child,
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const char *tagname,
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gpointer data);
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void (* parser_finished) (GtkBuildable *buildable,
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GtkBuilder *builder);
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/**
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* GtkBuildableIface::get_internal_child:
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* @buildable: a `GtkBuildable`
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* @builder: a `GtkBuilder`
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* @childname: name of child
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*
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* Retrieves the internal child called @childname of the @buildable object.
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*
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* Returns: (transfer none): the internal child of the buildable object
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*/
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GObject * (* get_internal_child) (GtkBuildable *buildable,
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GtkBuilder *builder,
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const char *childname);
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};
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GDK_AVAILABLE_IN_ALL
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GType gtk_buildable_get_type (void) G_GNUC_CONST;
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GDK_AVAILABLE_IN_ALL
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const char * gtk_buildable_get_buildable_id (GtkBuildable *buildable);
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GDK_AVAILABLE_IN_ALL
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void gtk_buildable_parse_context_push (GtkBuildableParseContext *context,
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const GtkBuildableParser *parser,
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gpointer user_data);
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GDK_AVAILABLE_IN_ALL
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gpointer gtk_buildable_parse_context_pop (GtkBuildableParseContext *context);
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GDK_AVAILABLE_IN_ALL
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const char * gtk_buildable_parse_context_get_element (GtkBuildableParseContext *context);
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GDK_AVAILABLE_IN_ALL
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GPtrArray *gtk_buildable_parse_context_get_element_stack (GtkBuildableParseContext *context);
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GDK_AVAILABLE_IN_ALL
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void gtk_buildable_parse_context_get_position (GtkBuildableParseContext *context,
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int *line_number,
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int *char_number);
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G_END_DECLS
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#endif /* __GTK_BUILDABLE_H__ */
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