diff options
Diffstat (limited to 'widgets/text/e-text-model.c')
| -rw-r--r-- | widgets/text/e-text-model.c | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/widgets/text/e-text-model.c b/widgets/text/e-text-model.c new file mode 100644 index 0000000000..d571e87791 --- /dev/null +++ b/widgets/text/e-text-model.c @@ -0,0 +1,241 @@ +/* -*- 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; +} |