diff options
Diffstat (limited to 'widgets/text/e-text-model.c')
| -rw-r--r-- | widgets/text/e-text-model.c | 592 |
1 files changed, 0 insertions, 592 deletions
diff --git a/widgets/text/e-text-model.c b/widgets/text/e-text-model.c deleted file mode 100644 index 4fec8724d8..0000000000 --- a/widgets/text/e-text-model.c +++ /dev/null @@ -1,592 +0,0 @@ -/* -*- 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> */ - -#undef PARANOID_DEBUGGING - -#include <config.h> -#include <ctype.h> -#include <string.h> -#include <gtk/gtksignal.h> -#include "e-text-model-repos.h" -#include "e-text-model.h" - -#define CLASS(obj) (E_TEXT_MODEL_CLASS (GTK_OBJECT (obj)->klass)) - -enum { - E_TEXT_MODEL_CHANGED, - E_TEXT_MODEL_REPOSITION, - E_TEXT_MODEL_OBJECT_ACTIVATED, - E_TEXT_MODEL_LAST_SIGNAL -}; - -static guint e_text_model_signals[E_TEXT_MODEL_LAST_SIGNAL] = { 0 }; - -struct _ETextModelPrivate { - gchar *text; - gint len; -}; - -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 gint e_text_model_real_validate_position (ETextModel *, gint pos); -static const gchar *e_text_model_real_get_text (ETextModel *model); -static gint e_text_model_real_get_text_length (ETextModel *model); -static void e_text_model_real_set_text (ETextModel *model, const gchar *text); -static void e_text_model_real_insert (ETextModel *model, gint postion, const gchar *text); -static void e_text_model_real_insert_length (ETextModel *model, gint postion, const 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); - - e_text_model_signals[E_TEXT_MODEL_REPOSITION] = - gtk_signal_new ("reposition", - GTK_RUN_LAST, - object_class->type, - GTK_SIGNAL_OFFSET (ETextModelClass, reposition), - gtk_marshal_NONE__POINTER_POINTER, - GTK_TYPE_NONE, 2, - GTK_TYPE_POINTER, GTK_TYPE_POINTER); - - e_text_model_signals[E_TEXT_MODEL_OBJECT_ACTIVATED] = - gtk_signal_new ("object_activated", - GTK_RUN_LAST, - object_class->type, - GTK_SIGNAL_OFFSET (ETextModelClass, object_activated), - gtk_marshal_NONE__INT, - GTK_TYPE_NONE, 1, - GTK_TYPE_INT); - - gtk_object_class_add_signals (object_class, e_text_model_signals, E_TEXT_MODEL_LAST_SIGNAL); - - /* No default signal handlers. */ - klass->changed = NULL; - klass->reposition = NULL; - klass->object_activated = NULL; - - klass->validate_pos = e_text_model_real_validate_position; - - klass->get_text = e_text_model_real_get_text; - klass->get_text_len = e_text_model_real_get_text_length; - 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; - - /* We explicitly don't define default handlers for these. */ - klass->objectify = NULL; - klass->obj_count = NULL; - klass->get_nth_obj = NULL; - - object_class->destroy = e_text_model_destroy; -} - -/* Object initialization function for the text item */ -static void -e_text_model_init (ETextModel *model) -{ - model->priv = g_new0 (struct _ETextModelPrivate, 1); - model->priv->text = g_strdup (""); - model->priv->len = 0; -} - -/* 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); - - g_free (model->priv->text); - - g_free (model->priv); - model->priv = NULL; - - if (GTK_OBJECT_CLASS (parent_class)->destroy) - GTK_OBJECT_CLASS (parent_class)->destroy (object); -} - -static gint -e_text_model_real_validate_position (ETextModel *model, gint pos) -{ - gint len; - - if (pos < 0) - pos = 0; - else if (pos > ( len = e_text_model_get_text_length (model) )) - pos = len; - - return pos; -} - -static const gchar * -e_text_model_real_get_text (ETextModel *model) -{ - if (model->priv->text) - return model->priv->text; - else - return ""; -} - -static gint -e_text_model_real_get_text_length (ETextModel *model) -{ - if (model->priv->len < 0) - model->priv->len = strlen (e_text_model_get_text (model)); - - return model->priv->len; -} - -static void -e_text_model_real_set_text (ETextModel *model, const gchar *text) -{ - EReposAbsolute repos; - gboolean changed = FALSE; - - if (text == NULL) { - - changed = (model->priv->text != NULL); - - g_free (model->priv->text); - model->priv->text = NULL; - model->priv->len = -1; - - } else if (model->priv->text == NULL || strcmp (model->priv->text, text)) { - - g_free (model->priv->text); - model->priv->text = g_strdup (text); - model->priv->len = -1; - - changed = TRUE; - } - - if (changed) { - e_text_model_changed (model); - repos.model = model; - repos.pos = -1; - e_text_model_reposition (model, e_repos_absolute, &repos); - } -} - -static void -e_text_model_real_insert (ETextModel *model, gint position, const gchar *text) -{ - EReposInsertShift repos; - gchar *new_text; - gint ins_len; - - new_text = g_strdup_printf ("%.*s%s%s", position, model->priv->text, text, model->priv->text + position); - ins_len = strlen (text); - - if (model->priv->text) - g_free (model->priv->text); - - model->priv->text = new_text; - - if (model->priv->len >= 0) - model->priv->len += ins_len; - - e_text_model_changed (model); - - repos.model = model; - repos.pos = position; - repos.len = ins_len; - - e_text_model_reposition (model, e_repos_insert_shift, &repos); -} - -static void -e_text_model_real_insert_length (ETextModel *model, gint position, const gchar *text, gint length) -{ - EReposInsertShift repos; - gchar *new_text = g_strdup_printf ("%.*s%.*s%s", position, model->priv->text, length, text, model->priv->text + position); - - if (model->priv->text) - g_free (model->priv->text); - model->priv->text = new_text; - - if (model->priv->len >= 0) - model->priv->len += length; - - e_text_model_changed (model); - - repos.model = model; - repos.pos = position; - repos.len = length; - - e_text_model_reposition (model, e_repos_insert_shift, &repos); -} - -static void -e_text_model_real_delete (ETextModel *model, gint position, gint length) -{ - EReposDeleteShift repos; - - memmove (model->priv->text + position, model->priv->text + position + length, strlen (model->priv->text + position + length) + 1); - - if (model->priv->len >= 0) - model->priv->len -= length; - - e_text_model_changed (model); - - repos.model = model; - repos.pos = position; - repos.len = length; - - e_text_model_reposition (model, e_repos_delete_shift, &repos); -} - -void -e_text_model_changed (ETextModel *model) -{ - g_return_if_fail (model != NULL); - g_return_if_fail (E_IS_TEXT_MODEL (model)); - - /* - Objectify before emitting any signal. - While this method could, in theory, do pretty much anything, it is meant - for scanning objects and converting substrings into embedded objects. - */ - if (CLASS (model)->objectify) - CLASS (model)->objectify (model); - - gtk_signal_emit (GTK_OBJECT (model), - e_text_model_signals[E_TEXT_MODEL_CHANGED]); -} - -void -e_text_model_reposition (ETextModel *model, ETextModelReposFn fn, gpointer repos_data) -{ - g_return_if_fail (model != NULL); - g_return_if_fail (E_IS_TEXT_MODEL (model)); - g_return_if_fail (fn != NULL); - - gtk_signal_emit (GTK_OBJECT (model), - e_text_model_signals[E_TEXT_MODEL_REPOSITION], - fn, repos_data); -} - -gint -e_text_model_validate_position (ETextModel *model, gint pos) -{ - g_return_val_if_fail (model != NULL, 0); - g_return_val_if_fail (E_IS_TEXT_MODEL (model), 0); - - if (CLASS (model)->validate_pos) - pos = CLASS (model)->validate_pos (model, pos); - - return pos; -} - -const 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 (CLASS (model)->get_text) - return CLASS (model)->get_text (model); - - return ""; -} - -gint -e_text_model_get_text_length (ETextModel *model) -{ - g_return_val_if_fail (model != NULL, 0); - g_return_val_if_fail (E_IS_TEXT_MODEL (model), 0); - - if (CLASS (model)->get_text_len (model)) { - - gint len = CLASS (model)->get_text_len (model); - -#ifdef PARANOID_DEBUGGING - const gchar *str = e_text_model_get_text (model); - gint len2 = str ? strlen (str) : 0; - if (len != len) - g_error ("\"%s\" length reported as %d, not %d.", str, len, len2); -#endif - - return len; - - } else { - /* Calculate length the old-fashioned way... */ - const gchar *str = e_text_model_get_text (model); - return str ? strlen (str) : 0; - } -} - -void -e_text_model_set_text (ETextModel *model, const gchar *text) -{ - g_return_if_fail (model != NULL); - g_return_if_fail (E_IS_TEXT_MODEL (model)); - - if (CLASS (model)->set_text) - CLASS (model)->set_text (model, text); -} - -void -e_text_model_insert (ETextModel *model, gint position, const gchar *text) -{ - g_return_if_fail (model != NULL); - g_return_if_fail (E_IS_TEXT_MODEL (model)); - - if (text == NULL) - return; - - if (CLASS (model)->insert) - CLASS (model)->insert (model, position, text); -} - -void -e_text_model_insert_length (ETextModel *model, gint position, const gchar *text, gint length) -{ - g_return_if_fail (model != NULL); - g_return_if_fail (E_IS_TEXT_MODEL (model)); - g_return_if_fail (length >= 0); - - - if (text == NULL || length == 0) - return; - - if (CLASS (model)->insert_length) - CLASS (model)->insert_length (model, position, text, length); -} - -void -e_text_model_prepend (ETextModel *model, const gchar *text) -{ - g_return_if_fail (model != NULL); - g_return_if_fail (E_IS_TEXT_MODEL (model)); - - if (text == NULL) - return; - - e_text_model_insert (model, 0, text); -} - -void -e_text_model_append (ETextModel *model, const gchar *text) -{ - g_return_if_fail (model != NULL); - g_return_if_fail (E_IS_TEXT_MODEL (model)); - - if (text == NULL) - return; - - e_text_model_insert (model, e_text_model_get_text_length (model), text); -} - -void -e_text_model_delete (ETextModel *model, gint position, gint length) -{ - gint txt_len; - - g_return_if_fail (model != NULL); - g_return_if_fail (E_IS_TEXT_MODEL (model)); - g_return_if_fail (length >= 0); - - txt_len = e_text_model_get_text_length (model); - if (position + length > txt_len) - length = txt_len - position; - - if (length <= 0) - return; - - if (CLASS (model)->delete) - CLASS (model)->delete (model, position, length); -} - -gint -e_text_model_object_count (ETextModel *model) -{ - g_return_val_if_fail (model != NULL, 0); - g_return_val_if_fail (E_IS_TEXT_MODEL (model), 0); - - if (CLASS (model)->obj_count) - return CLASS (model)->obj_count (model); - - return 0; -} - -const gchar * -e_text_model_get_nth_object (ETextModel *model, gint n, gint *len) -{ - g_return_val_if_fail (model != NULL, NULL); - g_return_val_if_fail (E_IS_TEXT_MODEL (model), NULL); - - if (n < 0 || n >= e_text_model_object_count (model)) - return NULL; - - if (CLASS (model)->get_nth_obj) - return CLASS (model)->get_nth_obj (model, n, len); - - return NULL; -} - -gchar * -e_text_model_strdup_nth_object (ETextModel *model, gint n) -{ - const gchar *obj; - gint len = 0; - - g_return_val_if_fail (model != NULL, NULL); - g_return_val_if_fail (E_IS_TEXT_MODEL (model), NULL); - - obj = e_text_model_get_nth_object (model, n, &len); - - return obj ? g_strndup (obj, n) : NULL; -} - -void -e_text_model_get_nth_object_bounds (ETextModel *model, gint n, gint *start, gint *end) -{ - const gchar *txt = NULL, *obj = NULL; - gint len = 0; - - g_return_if_fail (model != NULL); - g_return_if_fail (E_IS_TEXT_MODEL (model)); - - txt = e_text_model_get_text (model); - obj = e_text_model_get_nth_object (model, n, &len); - - g_return_if_fail (obj != NULL); - - if (start) - *start = obj - txt; - if (end) - *end = obj - txt + len; -} - -gint -e_text_model_get_object_at_offset (ETextModel *model, gint offset) -{ - g_return_val_if_fail (model != NULL, -1); - g_return_val_if_fail (E_IS_TEXT_MODEL (model), -1); - - if (offset < 0 || offset >= e_text_model_get_text_length (model)) - return -1; - - /* If an optimized version has been provided, we use it. */ - if (CLASS (model)->obj_at_offset) { - - return CLASS (model)->obj_at_offset (model, offset); - - } else { - /* If not, we fake it.*/ - - gint i, N, pos0, pos1; - - N = e_text_model_object_count (model); - - for (i = 0; i < N; ++i) { - e_text_model_get_nth_object_bounds (model, i, &pos0, &pos1); - if (pos0 <= offset && offset < pos1) - return i; - } - - } - - return -1; -} - -gint -e_text_model_get_object_at_pointer (ETextModel *model, const gchar *s) -{ - g_return_val_if_fail (model != NULL, -1); - g_return_val_if_fail (E_IS_TEXT_MODEL (model), -1); - g_return_val_if_fail (s != NULL, -1); - - return e_text_model_get_object_at_offset (model, s - e_text_model_get_text (model)); -} - -void -e_text_model_activate_nth_object (ETextModel *model, gint n) -{ - g_return_if_fail (model != NULL); - g_return_if_fail (E_IS_TEXT_MODEL (model)); - g_return_if_fail (n >= 0); - g_return_if_fail (n < e_text_model_object_count (model)); - - gtk_signal_emit (GTK_OBJECT (model), e_text_model_signals[E_TEXT_MODEL_OBJECT_ACTIVATED], n); -} - -ETextModel * -e_text_model_new (void) -{ - ETextModel *model = gtk_type_new (e_text_model_get_type ()); - return model; -} |