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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* ETextModel - Text item model for evolution.
* Copyright (C) 2000 Helix Code, Inc.
*
* Author: Chris Lahey <clahey@umich.edu>
*
* A majority of code taken from:
*
* Text item type for GnomeCanvas widget
*
* GnomeCanvas is basically a port of the Tk toolkit's most excellent
* canvas widget. Tk is copyrighted by the Regents of the University
* of California, Sun Microsystems, and other parties.
*
* Copyright (C) 1998 The Free Software Foundation
*
* Author: Federico Mena <federico@nuclecu.unam.mx> */
#include <config.h>
#include <ctype.h>
#include "e-text-model.h"
enum {
E_TEXT_MODEL_CHANGED,
E_TEXT_MODEL_LAST_SIGNAL
};
static guint e_text_model_signals[E_TEXT_MODEL_LAST_SIGNAL] = { 0 };
static void e_text_model_class_init (ETextModelClass *class);
static void e_text_model_init (ETextModel *model);
static void e_text_model_destroy (GtkObject *object);
static gchar *e_text_model_real_get_text(ETextModel *model);
static void e_text_model_real_set_text(ETextModel *model, gchar *text);
static void e_text_model_real_insert(ETextModel *model, gint postion, gchar *text);
static void e_text_model_real_insert_length(ETextModel *model, gint postion, gchar *text, gint length);
static void e_text_model_real_delete(ETextModel *model, gint postion, gint length);
static GtkObject *parent_class;
/**
* e_text_model_get_type:
* @void:
*
* Registers the &ETextModel class if necessary, and returns the type ID
* associated to it.
*
* Return value: The type ID of the &ETextModel class.
**/
GtkType
e_text_model_get_type (void)
{
static GtkType model_type = 0;
if (!model_type) {
GtkTypeInfo model_info = {
"ETextModel",
sizeof (ETextModel),
sizeof (ETextModelClass),
(GtkClassInitFunc) e_text_model_class_init,
(GtkObjectInitFunc) e_text_model_init,
NULL, /* reserved_1 */
NULL, /* reserved_2 */
(GtkClassInitFunc) NULL
};
model_type = gtk_type_unique (gtk_object_get_type (), &model_info);
}
return model_type;
}
/* Class initialization function for the text item */
static void
e_text_model_class_init (ETextModelClass *klass)
{
GtkObjectClass *object_class;
object_class = (GtkObjectClass *) klass;
parent_class = gtk_type_class (gtk_object_get_type ());
e_text_model_signals[E_TEXT_MODEL_CHANGED] =
gtk_signal_new ("changed",
GTK_RUN_LAST,
object_class->type,
GTK_SIGNAL_OFFSET (ETextModelClass, changed),
gtk_marshal_NONE__NONE,
GTK_TYPE_NONE, 0);
gtk_object_class_add_signals (object_class, e_text_model_signals, E_TEXT_MODEL_LAST_SIGNAL);
klass->changed = NULL;
klass->get_text = e_text_model_real_get_text;
klass->set_text = e_text_model_real_set_text;
klass->insert = e_text_model_real_insert;
klass->insert_length = e_text_model_real_insert_length;
klass->delete = e_text_model_real_delete;
object_class->destroy = e_text_model_destroy;
}
/* Object initialization function for the text item */
static void
e_text_model_init (ETextModel *model)
{
model->text = NULL;
}
/* Destroy handler for the text item */
static void
e_text_model_destroy (GtkObject *object)
{
ETextModel *model;
g_return_if_fail (object != NULL);
g_return_if_fail (E_IS_TEXT_MODEL (object));
model = E_TEXT_MODEL (object);
if (model->text)
g_free (model->text);
if (GTK_OBJECT_CLASS (parent_class)->destroy)
(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}
static gchar *
e_text_model_real_get_text(ETextModel *model)
{
return model->text;
}
static void
e_text_model_real_set_text(ETextModel *model, gchar *text)
{
if (model->text)
g_free(model->text);
model->text = g_strdup(text);
e_text_model_changed(model);
}
static void
e_text_model_real_insert(ETextModel *model, gint position, gchar *text)
{
gchar *temp = g_strdup_printf("%.*s%s%s", position, model->text, text, model->text + position);
if (model->text)
g_free(model->text);
model->text = temp;
e_text_model_changed(model);
}
static void
e_text_model_real_insert_length(ETextModel *model, gint position, gchar *text, gint length)
{
gchar *temp = g_strdup_printf("%.*s%.*s%s", position, model->text, length, text, model->text + position);
if (model->text)
g_free(model->text);
model->text = temp;
e_text_model_changed(model);
}
static void
e_text_model_real_delete(ETextModel *model, gint position, gint length)
{
memmove(model->text + position, model->text + position + length, strlen(model->text + position + length) + 1);
e_text_model_changed(model);
}
void
e_text_model_changed(ETextModel *model)
{
g_return_if_fail (model != NULL);
g_return_if_fail (E_IS_TEXT_MODEL (model));
gtk_signal_emit (GTK_OBJECT (model),
e_text_model_signals [E_TEXT_MODEL_CHANGED]);
}
gchar *
e_text_model_get_text(ETextModel *model)
{
g_return_val_if_fail (model != NULL, NULL);
g_return_val_if_fail (E_IS_TEXT_MODEL (model), NULL);
if ( E_TEXT_MODEL_CLASS(GTK_OBJECT(model)->klass)->get_text )
return E_TEXT_MODEL_CLASS(GTK_OBJECT(model)->klass)->get_text(model);
else
return "";
}
void
e_text_model_set_text(ETextModel *model, gchar *text)
{
g_return_if_fail (model != NULL);
g_return_if_fail (E_IS_TEXT_MODEL (model));
if ( E_TEXT_MODEL_CLASS(GTK_OBJECT(model)->klass)->set_text )
E_TEXT_MODEL_CLASS(GTK_OBJECT(model)->klass)->set_text(model, text);
}
void
e_text_model_insert(ETextModel *model, gint position, gchar *text)
{
g_return_if_fail (model != NULL);
g_return_if_fail (E_IS_TEXT_MODEL (model));
if ( E_TEXT_MODEL_CLASS(GTK_OBJECT(model)->klass)->insert )
E_TEXT_MODEL_CLASS(GTK_OBJECT(model)->klass)->insert(model, position, text);
}
void
e_text_model_insert_length(ETextModel *model, gint position, gchar *text, gint length)
{
g_return_if_fail (model != NULL);
g_return_if_fail (E_IS_TEXT_MODEL (model));
if ( E_TEXT_MODEL_CLASS(GTK_OBJECT(model)->klass)->insert_length )
E_TEXT_MODEL_CLASS(GTK_OBJECT(model)->klass)->insert_length(model, position, text, length);
}
void
e_text_model_delete(ETextModel *model, gint position, gint length)
{
g_return_if_fail (model != NULL);
g_return_if_fail (E_IS_TEXT_MODEL (model));
if ( E_TEXT_MODEL_CLASS(GTK_OBJECT(model)->klass)->delete )
E_TEXT_MODEL_CLASS(GTK_OBJECT(model)->klass)->delete(model, position, length);
}
ETextModel *
e_text_model_new(void)
{
ETextModel *model = gtk_type_new (e_text_model_get_type ());
model->text = g_strdup("");
return model;
}
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