diff options
Diffstat (limited to 'widgets/misc/e-charset-combo-box.c')
| -rw-r--r-- | widgets/misc/e-charset-combo-box.c | 428 |
1 files changed, 428 insertions, 0 deletions
diff --git a/widgets/misc/e-charset-combo-box.c b/widgets/misc/e-charset-combo-box.c new file mode 100644 index 0000000000..9c992ce1f7 --- /dev/null +++ b/widgets/misc/e-charset-combo-box.c @@ -0,0 +1,428 @@ +/* + * e-charset-combo-box.c + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) version 3. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with the program; if not, see <http://www.gnu.org/licenses/> + * + * + * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com) + * + */ + +#include "e-charset-combo-box.h" + +#include <glib/gi18n.h> + +#include "e-util/e-charset.h" +#include "e-util/e-util.h" + +#define E_CHARSET_COMBO_BOX_GET_PRIVATE(obj) \ + (G_TYPE_INSTANCE_GET_PRIVATE \ + ((obj), E_TYPE_CHARSET_COMBO_BOX, ECharsetComboBoxPrivate)) + +#define DEFAULT_CHARSET "UTF-8" +#define OTHER_VALUE G_MAXINT + +struct _ECharsetComboBoxPrivate { + GtkActionGroup *action_group; + GtkRadioAction *other_action; + GHashTable *charset_index; + + /* Used when the user clicks Cancel in the character set + * dialog. Reverts to the previous combo box setting. */ + gint previous_index; + + /* When setting the character set programmatically, this + * prevents the custom character set dialog from running. */ + guint block_dialog : 1; +}; + +enum { + PROP_0, + PROP_CHARSET +}; + +static gpointer parent_class; + +static void +charset_combo_box_entry_changed_cb (GtkEntry *entry, + GtkDialog *dialog) +{ + const gchar *text; + gboolean sensitive; + + text = gtk_entry_get_text (entry); + sensitive = (text != NULL && *text != '\0'); + gtk_dialog_set_response_sensitive (dialog, GTK_RESPONSE_OK, sensitive); +} + +static void +charset_combo_box_run_dialog (ECharsetComboBox *combo_box) +{ + GtkDialog *dialog; + GtkEntry *entry; + GtkWidget *container; + GtkWidget *widget; + GObject *object; + gpointer parent; + const gchar *charset; + + /* FIXME Using a dialog for this is lame. Selecting "Other..." + * should unlock an entry directly in the Preferences tab. + * Unfortunately space in Preferences is at a premium right + * now, but we should revisit this when the space issue is + * finally resolved. */ + + parent = gtk_widget_get_toplevel (GTK_WIDGET (combo_box)); + parent = GTK_WIDGET_TOPLEVEL (parent) ? parent : NULL; + + object = G_OBJECT (combo_box->priv->other_action); + charset = g_object_get_data (object, "charset"); + + widget = gtk_dialog_new_with_buttons ( + _("Character Encoding"), parent, + GTK_DIALOG_DESTROY_WITH_PARENT, + GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL, + GTK_STOCK_OK, GTK_RESPONSE_OK, NULL); + + /* Load the broken border width defaults so we can override them. */ + gtk_widget_ensure_style (widget); + + dialog = GTK_DIALOG (widget); + + gtk_dialog_set_has_separator (dialog, FALSE); + gtk_dialog_set_default_response (dialog, GTK_RESPONSE_OK); + + gtk_container_set_border_width (GTK_CONTAINER (dialog), 12); + + widget = gtk_dialog_get_action_area (dialog); + gtk_container_set_border_width (GTK_CONTAINER (widget), 0); + + widget = gtk_dialog_get_content_area (dialog); + gtk_box_set_spacing (GTK_BOX (widget), 12); + gtk_container_set_border_width (GTK_CONTAINER (widget), 0); + + container = widget; + + widget = gtk_label_new (_("Enter the character set to use")); + gtk_label_set_line_wrap (GTK_LABEL (widget), TRUE); + gtk_misc_set_alignment (GTK_MISC (widget), 0.0, 0.5); + gtk_box_pack_start (GTK_BOX (container), widget, FALSE, FALSE, 0); + gtk_widget_show (widget); + + widget = gtk_alignment_new (0.0, 0.0, 1.0, 1.0); + gtk_alignment_set_padding (GTK_ALIGNMENT (widget), 0, 0, 12, 0); + gtk_box_pack_start (GTK_BOX (container), widget, FALSE, FALSE, 0); + gtk_widget_show (widget); + + container = widget; + + widget = gtk_entry_new (); + entry = GTK_ENTRY (widget); + gtk_entry_set_activates_default (entry, TRUE); + gtk_container_add (GTK_CONTAINER (container), widget); + gtk_widget_show (widget); + + g_signal_connect ( + entry, "changed", + G_CALLBACK (charset_combo_box_entry_changed_cb), dialog); + + /* Set the default text -after- connecting the signal handler. + * This will initialize the "OK" button to the proper state. */ + gtk_entry_set_text (entry, charset); + + if (gtk_dialog_run (dialog) != GTK_RESPONSE_OK) { + gint active; + + /* Revert to the previously selected character set. */ + combo_box->priv->block_dialog = TRUE; + active = combo_box->priv->previous_index; + gtk_combo_box_set_active (GTK_COMBO_BOX (combo_box), active); + combo_box->priv->block_dialog = FALSE; + + goto exit; + } + + charset = gtk_entry_get_text (entry); + g_return_if_fail (charset != NULL && charset != '\0'); + + g_object_set_data_full ( + object, "charset", g_strdup (charset), + (GDestroyNotify) g_free); + +exit: + gtk_widget_destroy (GTK_WIDGET (dialog)); +} + +static void +charset_combo_box_notify_charset_cb (ECharsetComboBox *combo_box) +{ + GtkToggleAction *action; + + action = GTK_TOGGLE_ACTION (combo_box->priv->other_action); + if (!gtk_toggle_action_get_active (action)) + return; + + if (combo_box->priv->block_dialog) + return; + + /* "Other" action was selected by user. */ + charset_combo_box_run_dialog (combo_box); +} + +static void +charset_combo_box_set_property (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec) +{ + switch (property_id) { + case PROP_CHARSET: + e_charset_combo_box_set_charset ( + E_CHARSET_COMBO_BOX (object), + g_value_get_string (value)); + return; + } + + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); +} + +static void +charset_combo_box_get_property (GObject *object, + guint property_id, + GValue *value, + GParamSpec *pspec) +{ + switch (property_id) { + case PROP_CHARSET: + g_value_set_string ( + value, e_charset_combo_box_get_charset ( + E_CHARSET_COMBO_BOX (object))); + return; + } + + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); +} + +static void +charset_combo_box_dispose (GObject *object) +{ + ECharsetComboBoxPrivate *priv; + + priv = E_CHARSET_COMBO_BOX_GET_PRIVATE (object); + + if (priv->action_group != NULL) { + g_object_unref (priv->action_group); + priv->action_group = NULL; + } + + if (priv->other_action != NULL) { + g_object_unref (priv->other_action); + priv->other_action = NULL; + } + + g_hash_table_remove_all (priv->charset_index); + + /* Chain up to parent's dispose() method. */ + G_OBJECT_CLASS (parent_class)->dispose (object); +} + +static void +charset_combo_box_finalize (GObject *object) +{ + ECharsetComboBoxPrivate *priv; + + priv = E_CHARSET_COMBO_BOX_GET_PRIVATE (object); + + g_hash_table_destroy (priv->charset_index); + + /* Chain up to parent's finalize() method. */ + G_OBJECT_CLASS (parent_class)->finalize (object); +} + +static void +charset_combo_box_changed (GtkComboBox *combo_box) +{ + ECharsetComboBoxPrivate *priv; + + priv = E_CHARSET_COMBO_BOX_GET_PRIVATE (combo_box); + + /* Chain up to parent's changed() method. */ + GTK_COMBO_BOX_CLASS (parent_class)->changed (combo_box); + + /* Notify -before- updating previous index. */ + g_object_notify (G_OBJECT (combo_box), "charset"); + priv->previous_index = gtk_combo_box_get_active (combo_box); +} + +static void +charset_combo_box_class_init (ECharsetComboBoxClass *class) +{ + GObjectClass *object_class; + GtkComboBoxClass *combo_box_class; + + parent_class = g_type_class_peek_parent (class); + g_type_class_add_private (class, sizeof (ECharsetComboBoxPrivate)); + + object_class = G_OBJECT_CLASS (class); + object_class->set_property = charset_combo_box_set_property; + object_class->get_property = charset_combo_box_get_property; + object_class->dispose = charset_combo_box_dispose; + object_class->finalize = charset_combo_box_finalize; + + combo_box_class = GTK_COMBO_BOX_CLASS (class); + combo_box_class->changed = charset_combo_box_changed; + + g_object_class_install_property ( + object_class, + PROP_CHARSET, + g_param_spec_string ( + "charset", + "Charset", + "The selected character set", + "UTF-8", + G_PARAM_READWRITE | + G_PARAM_CONSTRUCT)); +} + +static void +charset_combo_box_init (ECharsetComboBox *combo_box) +{ + GtkActionGroup *action_group; + GtkRadioAction *radio_action; + GHashTable *charset_index; + GSList *group, *iter; + + action_group = gtk_action_group_new ("charset-combo-box-internal"); + + charset_index = g_hash_table_new_full ( + g_str_hash, g_str_equal, + (GDestroyNotify) g_free, + (GDestroyNotify) g_object_unref); + + combo_box->priv = E_CHARSET_COMBO_BOX_GET_PRIVATE (combo_box); + combo_box->priv->action_group = action_group; + combo_box->priv->charset_index = charset_index; + + group = e_charset_add_radio_actions ( + action_group, "charset-", NULL, NULL, NULL); + + /* Populate the character set index. */ + for (iter = group; iter != NULL; iter = iter->next) { + GObject *object = iter->data; + const gchar *charset; + + charset = g_object_get_data (object, "charset"); + g_return_if_fail (charset != NULL); + + g_hash_table_insert ( + charset_index, g_strdup (charset), + g_object_ref (object)); + } + + /* Note the "other" action is not included in the index. */ + + radio_action = gtk_radio_action_new ( + "charset-other", _("Other..."), NULL, NULL, OTHER_VALUE); + + g_object_set_data (G_OBJECT (radio_action), "charset", (gpointer) ""); + + gtk_radio_action_set_group (radio_action, group); + group = gtk_radio_action_get_group (radio_action); + + e_action_combo_box_set_action ( + E_ACTION_COMBO_BOX (combo_box), radio_action); + + e_action_combo_box_add_separator_after ( + E_ACTION_COMBO_BOX (combo_box), g_slist_length (group)); + + g_signal_connect ( + combo_box, "notify::charset", + G_CALLBACK (charset_combo_box_notify_charset_cb), NULL); + + combo_box->priv->other_action = radio_action; +} + +GType +e_charset_combo_box_get_type (void) +{ + static GType type = 0; + + if (G_UNLIKELY (type == 0)) { + static const GTypeInfo type_info = { + sizeof (ECharsetComboBoxClass), + (GBaseInitFunc) NULL, + (GBaseFinalizeFunc) NULL, + (GClassInitFunc) charset_combo_box_class_init, + (GClassFinalizeFunc) NULL, + NULL, /* class_data */ + sizeof (ECharsetComboBox), + 0, /* n_preallocs */ + (GInstanceInitFunc) charset_combo_box_init, + NULL /* value_table */ + }; + + type = g_type_register_static ( + E_TYPE_ACTION_COMBO_BOX, "ECharsetComboBox", + &type_info, 0); + } + + return type; +} + +GtkWidget * +e_charset_combo_box_new (void) +{ + return g_object_new (E_TYPE_CHARSET_COMBO_BOX, NULL); +} + +const gchar * +e_charset_combo_box_get_charset (ECharsetComboBox *combo_box) +{ + GtkRadioAction *radio_action; + + g_return_val_if_fail (E_IS_CHARSET_COMBO_BOX (combo_box), NULL); + + radio_action = combo_box->priv->other_action; + radio_action = e_radio_action_get_current_action (radio_action); + + return g_object_get_data (G_OBJECT (radio_action), "charset"); +} + +void +e_charset_combo_box_set_charset (ECharsetComboBox *combo_box, + const gchar *charset) +{ + GHashTable *charset_index; + GtkRadioAction *radio_action; + + g_return_if_fail (E_IS_CHARSET_COMBO_BOX (combo_box)); + + if (charset == NULL || *charset == '\0') + charset = "UTF-8"; + + charset_index = combo_box->priv->charset_index; + radio_action = g_hash_table_lookup (charset_index, charset); + + if (radio_action == NULL) { + radio_action = combo_box->priv->other_action; + g_object_set_data_full ( + G_OBJECT (radio_action), + "charset", g_strdup (charset), + (GDestroyNotify) g_free); + } + + combo_box->priv->block_dialog = TRUE; + gtk_toggle_action_set_active (GTK_TOGGLE_ACTION (radio_action), TRUE); + combo_box->priv->block_dialog = FALSE; +} |