--- /dev/null
+/* Copyright (c) 2007, Nokia Corporation
+ * All rights reserved.
+ *
+ */
+
+#include "modest-validating-entry.h"
+#include <gtk/gtksignal.h> /* For the gtk_signal_stop_emit_by_name() convenience function. */
+#include <string.h> /* For strlen(). */
+
+G_DEFINE_TYPE (EasysetupValidatingEntry, easysetup_validating_entry, GTK_TYPE_ENTRY);
+
+#define VALIDATING_ENTRY_GET_PRIVATE(o) \
+ (G_TYPE_INSTANCE_GET_PRIVATE ((o), EASYSETUP_TYPE_VALIDATING_ENTRY, EasysetupValidatingEntryPrivate))
+
+typedef struct _EasysetupValidatingEntryPrivate EasysetupValidatingEntryPrivate;
+
+struct _EasysetupValidatingEntryPrivate
+{
+ /* A list of gunichar, rather than char*,
+ * because gunichar is easier to deal with internally,
+ * but gchar* is easier to supply from the external interface.
+ */
+ GList *list_prevent;
+
+ gboolean prevent_whitespace;
+};
+
+static void
+easysetup_validating_entry_get_property (GObject *object, guint property_id,
+ GValue *value, GParamSpec *pspec)
+{
+ switch (property_id) {
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ }
+}
+
+static void
+easysetup_validating_entry_set_property (GObject *object, guint property_id,
+ const GValue *value, GParamSpec *pspec)
+{
+ switch (property_id) {
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ }
+}
+
+static void
+easysetup_validating_entry_dispose (GObject *object)
+{
+ if (G_OBJECT_CLASS (easysetup_validating_entry_parent_class)->dispose)
+ G_OBJECT_CLASS (easysetup_validating_entry_parent_class)->dispose (object);
+}
+
+static void
+easysetup_validating_entry_finalize (GObject *object)
+{
+ EasysetupValidatingEntryPrivate *priv = VALIDATING_ENTRY_GET_PRIVATE (object);
+
+ /* Free the list and its items: */
+ if (priv->list_prevent) {
+ g_list_foreach (priv->list_prevent, (GFunc)&g_free, NULL);
+ g_list_free (priv->list_prevent);
+ }
+
+ G_OBJECT_CLASS (easysetup_validating_entry_parent_class)->finalize (object);
+}
+
+static void
+easysetup_validating_entry_class_init (EasysetupValidatingEntryClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+ g_type_class_add_private (klass, sizeof (EasysetupValidatingEntryPrivate));
+
+ object_class->get_property = easysetup_validating_entry_get_property;
+ object_class->set_property = easysetup_validating_entry_set_property;
+ object_class->dispose = easysetup_validating_entry_dispose;
+ object_class->finalize = easysetup_validating_entry_finalize;
+}
+
+static gint
+on_list_compare(gconstpointer a, gconstpointer b)
+{
+ gunichar* unichar_a = (gunichar*)(a);
+ gunichar* unichar_b = (gunichar*)(b);
+ if(*unichar_a == *unichar_b)
+ return 0;
+ else
+ return -1; /* Really, we should return > and <, but we don't use this for sorting. */
+}
+
+static void
+on_insert_text(GtkEditable *editable,
+ gchar *new_text, gint new_text_length,
+ gint *position,
+ gpointer user_data)
+{
+ EasysetupValidatingEntry *self = EASYSETUP_VALIDATING_ENTRY (user_data);
+ EasysetupValidatingEntryPrivate *priv = VALIDATING_ENTRY_GET_PRIVATE (self);
+
+ if(!new_text_length)
+ return;
+
+ /* Note: new_text_length is documented as the number of bytes, not characters. */
+ if(!g_utf8_validate (new_text, new_text_length, NULL))
+ return;
+
+ /* Look at each UTF-8 character in the text (it could be several via a drop or a paste),
+ * and check them */
+ gboolean allow = TRUE;
+ gchar *iter = new_text; /* new_text seems to be NULL-terminated, though that is not documented. */
+ while (iter)
+ {
+ if(priv->list_prevent) {
+ /* If the character is in our prevent list,
+ * then do not allow this text to be entered.
+ *
+ * This prevents entry of all text, without removing the unwanted characters.
+ * It is debatable whether that is the best thing to do.
+ */
+ gunichar one_char = g_utf8_get_char (iter);
+ GList *found = g_list_find_custom(priv->list_prevent, &one_char, &on_list_compare);
+ if(found) {
+ allow = FALSE;
+ break;
+ }
+ }
+
+ if(priv->prevent_whitespace) {
+ /* Check for whitespace characters: */
+ gunichar one_char = g_utf8_get_char (iter);
+ if (g_unichar_isspace (one_char)) {
+ allow = FALSE;
+ break;
+ }
+ }
+
+ /* Crashes. Don't know why: iter = g_utf8_next_char (iter);
+ * Maybe it doesn't check for null-termination. */
+ iter = g_utf8_find_next_char (iter, new_text + new_text_length);
+ }
+
+ if(!allow) {
+ /* The signal documentation says
+ * "by connecting to this signal and then stopping the signal with
+ * gtk_signal_emit_stop(), it is possible to modify the inserted text,
+ * or prevent it from being inserted entirely."
+ */
+ gtk_signal_emit_stop_by_name (GTK_OBJECT (self), "insert-text");
+ }
+}
+
+static void
+easysetup_validating_entry_init (EasysetupValidatingEntry *self)
+{
+ /* Connect to the GtkEditable::insert-text signal
+ * so we can filter out some characters:
+ * We connect _before_ so we can stop the default signal handler from running.
+ */
+ g_signal_connect (G_OBJECT (self), "insert-text", (GCallback)&on_insert_text, self);
+}
+
+EasysetupValidatingEntry*
+easysetup_validating_entry_new (void)
+{
+ return g_object_new (EASYSETUP_TYPE_VALIDATING_ENTRY, NULL);
+}
+
+/** Specify characters that may not be entered into this GtkEntry.
+ *
+ * list: A list of gchar* strings. Each one identifies a UTF-8 character.
+ */
+void easysetup_validating_entry_set_unallowed_characters (EasysetupValidatingEntry *self, GList *list)
+{
+ EasysetupValidatingEntryPrivate *priv = VALIDATING_ENTRY_GET_PRIVATE (self);
+
+ /* Free the list and its items: */
+ if (priv->list_prevent) {
+ g_list_foreach (priv->list_prevent, (GFunc)&g_free, NULL);
+ g_list_free (priv->list_prevent);
+ }
+
+ /* Do a deep copy of the list, converting gchar* to gunichar: */
+ priv->list_prevent = NULL;
+ GList *iter = NULL;
+ for (iter = list; iter != NULL; iter = iter->next) {
+ gunichar *one_char = g_new0 (gunichar, 1);
+ if(iter->data)
+ *one_char = g_utf8_get_char ((gchar*)iter->data);
+ else
+ *one_char = 0;
+
+ priv->list_prevent = g_list_append (priv->list_prevent, one_char);
+ }
+}
+
+/** Specify that no whitespace characters may be entered into this GtkEntry.
+ *
+ */
+void easysetup_validating_entry_set_unallowed_characters_whitespace (EasysetupValidatingEntry *self)
+{
+ EasysetupValidatingEntryPrivate *priv = VALIDATING_ENTRY_GET_PRIVATE (self);
+ priv->prevent_whitespace = TRUE;
+}
projects / modest / blobdiff