Add a "modified" property to LdDocument.
The property is set to TRUE whenever the document changes. The user may set it back to FALSE with ld_document_set_modified(). Also don't emit the "changed" signal when nothing has happened.
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@ -27,12 +27,15 @@
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/*
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* LdDocumentPrivate:
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* @modified: Whether the document has been modified.
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* @objects: All the objects in the document.
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* @selection: All currently selected objects.
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* @connections: Connections between objects.
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*/
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struct _LdDocumentPrivate
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{
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gboolean modified;
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GSList *objects;
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GSList *selection;
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GSList *connections;
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@ -40,18 +43,47 @@ struct _LdDocumentPrivate
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G_DEFINE_TYPE (LdDocument, ld_document, G_TYPE_OBJECT);
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static void
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ld_document_finalize (GObject *gobject);
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enum
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{
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PROP_0,
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PROP_MODIFIED
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};
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static void ld_document_get_property (GObject *object, guint property_id,
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GValue *value, GParamSpec *pspec);
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static void ld_document_set_property (GObject *object, guint property_id,
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const GValue *value, GParamSpec *pspec);
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static void ld_document_dispose (GObject *gobject);
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static void ld_document_finalize (GObject *gobject);
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static void ld_document_real_changed (LdDocument *self);
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static void ld_document_clear_internal (LdDocument *self);
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static void
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ld_document_class_init (LdDocumentClass *klass)
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{
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GObjectClass *object_class;
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GParamSpec *pspec;
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object_class = G_OBJECT_CLASS (klass);
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object_class->get_property = ld_document_get_property;
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object_class->set_property = ld_document_set_property;
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object_class->dispose = ld_document_dispose;
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object_class->finalize = ld_document_finalize;
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klass->changed = ld_document_real_changed;
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/**
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* LdDocument:modified:
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*
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* Whether the document has been modified.
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*/
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pspec = g_param_spec_boolean ("modified", "Modified",
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"Whether the document has been modified.",
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FALSE, G_PARAM_READWRITE);
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g_object_class_install_property (object_class, PROP_MODIFIED, pspec);
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/**
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* LdDocument::changed:
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* @document: The document object.
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@ -61,7 +93,8 @@ ld_document_class_init (LdDocumentClass *klass)
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klass->changed_signal = g_signal_new
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("changed", G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_LAST | G_SIGNAL_NO_RECURSE | G_SIGNAL_NO_HOOKS,
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0, NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
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G_STRUCT_OFFSET (LdDocumentClass, changed), NULL, NULL,
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g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
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g_type_class_add_private (klass, sizeof (LdDocumentPrivate));
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}
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@ -74,17 +107,67 @@ ld_document_init (LdDocument *self)
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}
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static void
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ld_document_finalize (GObject *gobject)
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ld_document_get_property (GObject *object, guint property_id,
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GValue *value, GParamSpec *pspec)
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{
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LdDocument *self;
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self = LD_DOCUMENT (object);
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switch (property_id)
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{
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case PROP_MODIFIED:
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g_value_set_boolean (value, ld_document_get_modified (self));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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}
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}
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static void
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ld_document_set_property (GObject *object, guint property_id,
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const GValue *value, GParamSpec *pspec)
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{
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LdDocument *self;
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self = LD_DOCUMENT (object);
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switch (property_id)
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{
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case PROP_MODIFIED:
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ld_document_set_modified (self, g_value_get_boolean (value));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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}
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}
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static void
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ld_document_dispose (GObject *gobject)
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{
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LdDocument *self;
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self = LD_DOCUMENT (gobject);
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ld_document_clear (self);
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ld_document_clear_internal (self);
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/* Chain up to the parent class. */
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G_OBJECT_CLASS (ld_document_parent_class)->dispose (gobject);
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}
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static void
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ld_document_finalize (GObject *gobject)
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{
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/* Chain up to the parent class. */
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G_OBJECT_CLASS (ld_document_parent_class)->finalize (gobject);
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}
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static void
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ld_document_real_changed (LdDocument *self)
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{
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g_return_if_fail (LD_IS_DOCUMENT (self));
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ld_document_set_modified (self, TRUE);
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}
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/**
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* ld_document_new:
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*
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@ -107,6 +190,21 @@ ld_document_clear (LdDocument *self)
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{
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g_return_if_fail (LD_IS_DOCUMENT (self));
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ld_document_clear_internal (self);
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g_signal_emit (self,
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LD_DOCUMENT_GET_CLASS (self)->changed_signal, 0);
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}
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/*
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* ld_document_clear_internal:
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* @self: An #LdDocument object.
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*
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* Do the same what ld_document_clear() does but don't emit signals.
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*/
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static void
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ld_document_clear_internal (LdDocument *self)
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{
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g_slist_free (self->priv->connections);
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self->priv->connections = NULL;
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@ -117,9 +215,6 @@ ld_document_clear (LdDocument *self)
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g_slist_foreach (self->priv->objects, (GFunc) g_object_unref, NULL);
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g_slist_free (self->priv->objects);
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self->priv->objects = NULL;
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g_signal_emit (self,
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LD_DOCUMENT_GET_CLASS (self)->changed_signal, 0);
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}
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/**
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@ -162,6 +257,33 @@ ld_document_save_to_file (LdDocument *self,
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return FALSE;
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}
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/**
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* ld_document_get_modified:
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* @self: An #LdDocument object.
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*
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* Return value: The modification status of document.
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*/
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gboolean
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ld_document_get_modified (LdDocument *self)
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{
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g_return_val_if_fail (LD_IS_DOCUMENT (self), FALSE);
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return self->priv->modified;
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}
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/**
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* ld_document_set_modified:
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* @self: An #LdDocument object.
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* @value: Whether the document has been modified.
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*
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* Set the modification status of document.
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*/
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void
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ld_document_set_modified (LdDocument *self, gboolean value)
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{
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g_return_if_fail (LD_IS_DOCUMENT (self));
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self->priv->modified = value;
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}
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/**
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* ld_document_get_objects:
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* @self: An #LdDocument object.
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@ -196,9 +318,10 @@ ld_document_insert_object (LdDocument *self, LdDocumentObject *object, gint pos)
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self->priv->objects =
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g_slist_insert (self->priv->objects, object, pos);
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g_object_ref (object);
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g_signal_emit (self,
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LD_DOCUMENT_GET_CLASS (self)->changed_signal, 0);
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}
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g_signal_emit (self,
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LD_DOCUMENT_GET_CLASS (self)->changed_signal, 0);
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}
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/**
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@ -220,9 +343,10 @@ ld_document_remove_object (LdDocument *self, LdDocumentObject *object)
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self->priv->objects = g_slist_remove (self->priv->objects, object);
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g_object_unref (object);
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g_signal_emit (self,
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LD_DOCUMENT_GET_CLASS (self)->changed_signal, 0);
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}
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g_signal_emit (self,
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LD_DOCUMENT_GET_CLASS (self)->changed_signal, 0);
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}
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/**
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@ -260,9 +384,10 @@ ld_document_selection_add (LdDocument *self, LdDocumentObject *object, gint pos)
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self->priv->selection =
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g_slist_insert (self->priv->selection, object, pos);
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g_object_ref (object);
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g_signal_emit (self,
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LD_DOCUMENT_GET_CLASS (self)->changed_signal, 0);
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}
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g_signal_emit (self,
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LD_DOCUMENT_GET_CLASS (self)->changed_signal, 0);
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}
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/**
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@ -282,7 +407,8 @@ ld_document_selection_remove (LdDocument *self, LdDocumentObject *object)
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{
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self->priv->selection = g_slist_remove (self->priv->selection, object);
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g_object_unref (object);
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g_signal_emit (self,
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LD_DOCUMENT_GET_CLASS (self)->changed_signal, 0);
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}
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g_signal_emit (self,
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LD_DOCUMENT_GET_CLASS (self)->changed_signal, 0);
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}
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@ -48,7 +48,10 @@ struct _LdDocumentClass
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/*< private >*/
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GObjectClass parent_class;
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/* FIXME: Add a selection_changed signal? */
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guint changed_signal;
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void (*changed) (LdDocument *self);
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};
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@ -61,6 +64,9 @@ gboolean ld_document_load_from_file (LdDocument *self,
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gboolean ld_document_save_to_file (LdDocument *self,
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const gchar *filename, GError *error);
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gboolean ld_document_get_modified (LdDocument *self);
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void ld_document_set_modified (LdDocument *self, gboolean value);
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GSList *ld_document_get_objects (LdDocument *self);
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void ld_document_insert_object (LdDocument *self,
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LdDocumentObject *object, gint pos);
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