Introduce LdUndoAction.
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@ -110,6 +110,7 @@ set (project_DOC_DIR "${CMAKE_CURRENT_SOURCE_DIR}/docs/reference")
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set (liblogdiag_SOURCES
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liblogdiag/ld-marshal.c
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liblogdiag/ld-types.c
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liblogdiag/ld-undo-action.c
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liblogdiag/ld-diagram.c
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liblogdiag/ld-diagram-object.c
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liblogdiag/ld-diagram-symbol.c
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@ -125,6 +126,7 @@ set (liblogdiag_HEADERS
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liblogdiag/liblogdiag.h
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liblogdiag/ld-marshal.h
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liblogdiag/ld-types.h
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liblogdiag/ld-undo-action.h
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liblogdiag/ld-diagram.h
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liblogdiag/ld-diagram-object.h
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liblogdiag/ld-diagram-symbol.h
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@ -0,0 +1,128 @@
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/*
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* ld-undo-action.c
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*
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* This file is a part of logdiag.
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* Copyright Přemysl Janouch 2011. All rights reserved.
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*
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* See the file LICENSE for licensing information.
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*
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*/
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#include <string.h>
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#include "liblogdiag.h"
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#include "config.h"
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/**
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* SECTION:ld-undo-action
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* @short_description: An action that can be undone.
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* @see_also: #LdDiagram, #LdDiagramObject
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*
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* #LdUndoAction represents an action that can be reverted.
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*/
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/*
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* LdUndoActionPrivate:
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* @undo_func: a callback to undo the action.
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* @redo_func: a callback to redo the action.
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* @destroy_func: a callback to destroy user data.
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* @user_data: data given by the user.
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*/
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struct _LdUndoActionPrivate
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{
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LdUndoActionFunc undo_func;
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LdUndoActionFunc redo_func;
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LdUndoActionFunc destroy_func;
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gpointer user_data;
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};
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static void ld_undo_action_finalize (GObject *gobject);
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G_DEFINE_TYPE (LdUndoAction, ld_undo_action, G_TYPE_OBJECT);
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static void
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ld_undo_action_class_init (LdUndoActionClass *klass)
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{
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GObjectClass *object_class;
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object_class = G_OBJECT_CLASS (klass);
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object_class->finalize = ld_undo_action_finalize;
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g_type_class_add_private (klass, sizeof (LdUndoActionPrivate));
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}
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static void
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ld_undo_action_init (LdUndoAction *self)
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{
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self->priv = G_TYPE_INSTANCE_GET_PRIVATE
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(self, LD_TYPE_UNDO_ACTION, LdUndoActionPrivate);
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}
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static void
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ld_undo_action_finalize (GObject *gobject)
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{
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LdUndoAction *self;
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self = LD_UNDO_ACTION (gobject);
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if (self->priv->destroy_func)
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self->priv->destroy_func (self->priv->user_data);
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/* Chain up to the parent class. */
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G_OBJECT_CLASS (ld_undo_action_parent_class)->finalize (gobject);
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}
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/**
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* ld_undo_action_new:
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* @undo_func: a callback to undo the action.
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* @redo_func: a callback to redo the action.
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* @destroy_func: (allow-none): a callback to destroy user data.
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* @user_data: user data passed to callbacks.
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*
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* Return value: a new #LdUndoAction object.
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*/
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LdUndoAction *
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ld_undo_action_new (LdUndoActionFunc undo_func,
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LdUndoActionFunc redo_func, LdUndoActionFunc destroy_func,
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gpointer user_data)
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{
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LdUndoAction *self;
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g_return_val_if_fail (undo_func != NULL, NULL);
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g_return_val_if_fail (redo_func != NULL, NULL);
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self = g_object_new (LD_TYPE_UNDO_ACTION, NULL);
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self->priv->undo_func = undo_func;
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self->priv->redo_func = redo_func;
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self->priv->destroy_func = destroy_func;
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self->priv->user_data = user_data;
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return self;
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}
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/**
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* ld_undo_action_undo:
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* @self: an #LdUndoAction object.
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*
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* Undo the action handled by this object.
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*/
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void
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ld_undo_action_undo (LdUndoAction *self)
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{
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g_return_if_fail (LD_IS_UNDO_ACTION (self));
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self->priv->undo_func (self->priv->user_data);
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}
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/**
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* ld_undo_action_redo:
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* @self: an #LdUndoAction object.
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*
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* Redo the action handled by this object.
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*/
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void
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ld_undo_action_redo (LdUndoAction *self)
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{
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g_return_if_fail (LD_IS_UNDO_ACTION (self));
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self->priv->redo_func (self->priv->user_data);
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}
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@ -0,0 +1,76 @@
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/*
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* ld-undo-action.h
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*
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* This file is a part of logdiag.
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* Copyright Přemysl Janouch 2011. All rights reserved.
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*
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* See the file LICENSE for licensing information.
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*
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*/
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#ifndef __LD_UNDO_ACTION_H__
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#define __LD_UNDO_ACTION_H__
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G_BEGIN_DECLS
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#define LD_TYPE_UNDO_ACTION (ld_undo_action_get_type ())
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#define LD_UNDO_ACTION(obj) (G_TYPE_CHECK_INSTANCE_CAST \
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((obj), LD_TYPE_UNDO_ACTION, LdUndoAction))
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#define LD_UNDO_ACTION_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST \
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((klass), LD_TYPE_UNDO_ACTION, LdUndoActionClass))
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#define LD_IS_UNDO_ACTION(obj) (G_TYPE_CHECK_INSTANCE_TYPE \
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((obj), LD_TYPE_UNDO_ACTION))
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#define LD_IS_UNDO_ACTION_CLASS(klass) (G_TYPE_CHECK_INSTANCE_TYPE \
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((klass), LD_TYPE_UNDO_ACTION))
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#define LD_UNDO_ACTION_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS \
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((obj), LD_UNDO_ACTION, LdUndoActionClass))
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typedef struct _LdUndoAction LdUndoAction;
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typedef struct _LdUndoActionPrivate LdUndoActionPrivate;
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typedef struct _LdUndoActionClass LdUndoActionClass;
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/**
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* LdUndoAction:
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*/
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struct _LdUndoAction
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{
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/*< private >*/
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GObject parent_instance;
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LdUndoActionPrivate *priv;
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};
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/**
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* LdUndoActionClass:
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*/
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struct _LdUndoActionClass
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{
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/*< private >*/
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GObjectClass parent_class;
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};
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/**
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* LdUndoActionFunc:
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* @user_data: user data passed to ld_undo_action_new().
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*
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* A callback function prototype for actions.
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*/
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typedef void (*LdUndoActionFunc) (gpointer user_data);
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GType ld_undo_action_get_type (void) G_GNUC_CONST;
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/* TODO: Extend the methods (with eg. a string description). */
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LdUndoAction *ld_undo_action_new (LdUndoActionFunc undo_func,
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LdUndoActionFunc redo_func, LdUndoActionFunc destroy_func,
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gpointer user_data);
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void ld_undo_action_undo (LdUndoAction *self);
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void ld_undo_action_redo (LdUndoAction *self);
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G_END_DECLS
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#endif /* ! __LD_UNDO_ACTION_H__ */
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@ -21,6 +21,7 @@
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#include "ld-symbol-category.h"
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#include "ld-library.h"
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#include "ld-undo-action.h"
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#include "ld-diagram-object.h"
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#include "ld-diagram-symbol.h"
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#include "ld-diagram.h"
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