1 /* Copyright (c) 2007, Nokia Corporation
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * * Neither the name of the Nokia Corporation nor the names of its
14 * contributors may be used to endorse or promote products derived from
15 * this software without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
18 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
20 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
21 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
22 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
23 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
24 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
25 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
26 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
27 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 #include "modest-validating-entry.h"
31 #include <modest-ui-constants.h>
32 #include <gtk/gtksignal.h> /* For the gtk_signal_stop_emit_by_name() convenience function. */
33 #include <string.h> /* For strlen(). */
35 /* Include config.h so that _() works: */
41 G_DEFINE_TYPE (ModestValidatingEntry, modest_validating_entry, GTK_TYPE_ENTRY);
43 G_DEFINE_TYPE (ModestValidatingEntry, modest_validating_entry, HILDON_TYPE_ENTRY);
46 #define VALIDATING_ENTRY_GET_PRIVATE(o) \
47 (G_TYPE_INSTANCE_GET_PRIVATE ((o), MODEST_TYPE_VALIDATING_ENTRY, ModestValidatingEntryPrivate))
49 typedef struct _ModestValidatingEntryPrivate ModestValidatingEntryPrivate;
51 struct _ModestValidatingEntryPrivate
53 /* A list of gunichar, rather than char*,
54 * because gunichar is easier to deal with internally,
55 * but gchar* is easier to supply from the external interface.
59 gboolean prevent_whitespace;
61 EasySetupValidatingEntryFunc func;
62 gpointer func_user_data;
64 EasySetupValidatingEntryMaxFunc max_func;
65 gpointer max_func_user_data;
69 modest_validating_entry_get_property (GObject *object, guint property_id,
70 GValue *value, GParamSpec *pspec)
72 switch (property_id) {
74 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
79 modest_validating_entry_set_property (GObject *object, guint property_id,
80 const GValue *value, GParamSpec *pspec)
82 switch (property_id) {
84 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
89 modest_validating_entry_dispose (GObject *object)
91 if (G_OBJECT_CLASS (modest_validating_entry_parent_class)->dispose)
92 G_OBJECT_CLASS (modest_validating_entry_parent_class)->dispose (object);
96 modest_validating_entry_finalize (GObject *object)
98 ModestValidatingEntryPrivate *priv = VALIDATING_ENTRY_GET_PRIVATE (object);
100 /* Free the list and its items: */
101 if (priv->list_prevent) {
102 g_list_foreach (priv->list_prevent, (GFunc)&g_free, NULL);
103 g_list_free (priv->list_prevent);
106 G_OBJECT_CLASS (modest_validating_entry_parent_class)->finalize (object);
110 modest_validating_entry_class_init (ModestValidatingEntryClass *klass)
112 GObjectClass *object_class = G_OBJECT_CLASS (klass);
114 g_type_class_add_private (klass, sizeof (ModestValidatingEntryPrivate));
116 object_class->get_property = modest_validating_entry_get_property;
117 object_class->set_property = modest_validating_entry_set_property;
118 object_class->dispose = modest_validating_entry_dispose;
119 object_class->finalize = modest_validating_entry_finalize;
123 on_list_compare(gconstpointer a, gconstpointer b)
125 gunichar* unichar_a = (gunichar*)(a);
126 gunichar* unichar_b = (gunichar*)(b);
127 if(*unichar_a == *unichar_b)
130 return -1; /* Really, we should return > and <, but we don't use this for sorting. */
134 on_insert_text(GtkEditable *editable,
135 gchar *new_text, gint new_text_length,
139 ModestValidatingEntry *self = MODEST_VALIDATING_ENTRY (user_data);
140 ModestValidatingEntryPrivate *priv = VALIDATING_ENTRY_GET_PRIVATE (self);
145 /* Note: new_text_length is documented as the number of bytes, not characters. */
146 if(!g_utf8_validate (new_text, new_text_length, NULL))
149 /* Look at each UTF-8 character in the text (it could be several via a drop or a paste),
151 gboolean allow = TRUE;
152 gchar *iter = new_text; /* new_text seems to be NULL-terminated, though that is not documented. */
155 if(priv->list_prevent) {
156 /* If the character is in our prevent list,
157 * then do not allow this text to be entered.
159 * This prevents entry of all text, without removing the unwanted characters.
160 * It is debatable whether that is the best thing to do.
162 gunichar one_char = g_utf8_get_char (iter);
163 GList *found = g_list_find_custom(priv->list_prevent, &one_char, &on_list_compare);
168 priv->func(self, iter, priv->func_user_data);
174 if(priv->prevent_whitespace) {
175 /* Check for whitespace characters: */
176 gunichar one_char = g_utf8_get_char (iter);
177 if (g_unichar_isspace (one_char)) {
181 priv->func(self, NULL, priv->func_user_data);
187 /* Crashes. Don't know why: iter = g_utf8_next_char (iter);
188 * Maybe it doesn't check for null-termination. */
189 iter = g_utf8_find_next_char (iter, new_text + new_text_length);
192 /* Prevent more than the max characters.
193 * The regular GtkEntry does this already, but we also want to call a specified callback,
194 * so that the application can show a warning dialog. */
196 const gint max_num = gtk_entry_get_max_length (GTK_ENTRY (self));
198 const gchar *existing_text = gtk_entry_get_text (GTK_ENTRY(self));
199 const gint existing_length = existing_text ? g_utf8_strlen (existing_text, -1) : 0;
200 const gint new_length_chars = g_utf8_strlen (new_text, new_text_length);
202 if ((existing_length + new_length_chars) > max_num) {
203 priv->max_func (self, priv->max_func_user_data);
204 /* We shouldn't need to stop the signal because the underlying code will check too.
205 * Well, that would maybe be a performance optimization,
206 * but it's generally safer not to interfere too much. */
212 /* The signal documentation says
213 * "by connecting to this signal and then stopping the signal with
214 * gtk_signal_emit_stop(), it is possible to modify the inserted text,
215 * or prevent it from being inserted entirely."
217 gtk_signal_emit_stop_by_name (GTK_OBJECT (self), "insert-text");
223 modest_validating_entry_init (ModestValidatingEntry *self)
225 /* Connect to the GtkEditable::insert-text signal
226 * so we can filter out some characters:
227 * We connect _before_ so we can stop the default signal handler from running.
229 g_signal_connect (G_OBJECT (self), "insert-text", (GCallback)&on_insert_text, self);
232 ModestValidatingEntry*
233 modest_validating_entry_new (void)
235 ModestValidatingEntry *entry;
237 entry = g_object_new (MODEST_TYPE_VALIDATING_ENTRY, NULL);
239 #ifdef MODEST_TOOLKIT_HILDON2
240 hildon_gtk_widget_set_theme_size (GTK_WIDGET (entry), MODEST_EDITABLE_SIZE);
246 /** Specify characters that may not be entered into this GtkEntry.
248 * list: A list of gchar* strings. Each one identifies a UTF-8 character.
250 void modest_validating_entry_set_unallowed_characters (ModestValidatingEntry *self, GList *list)
252 ModestValidatingEntryPrivate *priv = VALIDATING_ENTRY_GET_PRIVATE (self);
254 /* Free the list and its items: */
255 if (priv->list_prevent) {
256 g_list_foreach (priv->list_prevent, (GFunc)&g_free, NULL);
257 g_list_free (priv->list_prevent);
260 /* Do a deep copy of the list, converting gchar* to gunichar: */
261 priv->list_prevent = NULL;
263 for (iter = list; iter != NULL; iter = iter->next) {
264 gunichar *one_char = g_new0 (gunichar, 1);
266 *one_char = g_utf8_get_char ((gchar*)iter->data);
270 priv->list_prevent = g_list_append (priv->list_prevent, one_char);
274 /** Specify that no whitespace characters may be entered into this GtkEntry.
277 void modest_validating_entry_set_unallowed_characters_whitespace (ModestValidatingEntry *self)
279 ModestValidatingEntryPrivate *priv = VALIDATING_ENTRY_GET_PRIVATE (self);
280 priv->prevent_whitespace = TRUE;
283 /** Set a callback to be called when the maximum number of characters have been entered.
284 * This may be used to show an informative dialog.
286 void modest_validating_entry_set_max_func (ModestValidatingEntry *self, EasySetupValidatingEntryMaxFunc func, gpointer user_data)
288 ModestValidatingEntryPrivate *priv = VALIDATING_ENTRY_GET_PRIVATE (self);
289 priv->max_func = func;
290 priv->max_func_user_data = user_data;
293 /** Set a callback to be called when a character was prevented so that a
294 * note can be shown by the application to inform the user. For whitespaces,
295 * character will be NULL
297 void modest_validating_entry_set_func (ModestValidatingEntry *self, EasySetupValidatingEntryFunc func, gpointer user_data)
299 ModestValidatingEntryPrivate *priv = VALIDATING_ENTRY_GET_PRIVATE (self);
301 priv->func_user_data = user_data;