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/*
 * 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-composer-private.h"
#include "e-util/e-util-private.h"

static void
composer_setup_charset_menu (EMsgComposer *composer)
{
    GtkUIManager *manager;
    const gchar *path;
    GList *list;
    guint merge_id;

    manager = gtkhtml_editor_get_ui_manager (GTKHTML_EDITOR (composer));
    path = "/main-menu/edit-menu/pre-spell-check/charset-menu";
    merge_id = gtk_ui_manager_new_merge_id (manager);

    list = gtk_action_group_list_actions (composer->priv->charset_actions);
    list = g_list_sort (list, (GCompareFunc) e_action_compare_by_label);

    while (list != NULL) {
        GtkAction *action = list->data;

        gtk_ui_manager_add_ui (
            manager, merge_id, path,
            gtk_action_get_name (action),
            gtk_action_get_name (action),
            GTK_UI_MANAGER_AUTO, FALSE);

        list = g_list_delete_link (list, list);
    }

    gtk_ui_manager_ensure_update (manager);
}

static void
composer_setup_recent_menu (EMsgComposer *composer)
{
    GtkUIManager *manager;
    GtkAction *action = NULL;
    const gchar *path, *action_name;
    guint merge_id;

    manager = gtkhtml_editor_get_ui_manager (GTKHTML_EDITOR (composer));
    action_name = "recent-menu";
    path = "/main-menu/insert-menu/insert-menu-top/recent-placeholder";
    merge_id = gtk_ui_manager_new_merge_id (manager);

    action = e_attachment_bar_recent_action_new (
            e_msg_composer_get_attachment_bar (composer), 
            action_name, _("Recent _Documents"));

    if (action != NULL) {
        gtk_action_group_add_action (composer->priv->composer_actions, action);

        gtk_ui_manager_add_ui ( 
            manager, merge_id, path,
            action_name, 
            action_name, 
            GTK_UI_MANAGER_AUTO, FALSE);
    }

    gtk_ui_manager_ensure_update (manager);
}

void
e_composer_private_init (EMsgComposer *composer)
{
    EMsgComposerPrivate *priv = composer->priv;

    GtkhtmlEditor *editor;
    GtkUIManager *manager;
    GtkWidget *widget;
    GtkWidget *expander;
    GtkWidget *container;
    GtkWidget *send_widget;
    const gchar *path;
    gchar *filename;
    GError *error = NULL;

    editor = GTKHTML_EDITOR (composer);
    manager = gtkhtml_editor_get_ui_manager (editor);

    priv->charset_actions = gtk_action_group_new ("charset");
    priv->composer_actions = gtk_action_group_new ("composer");

    priv->extra_hdr_names = g_ptr_array_new ();
    priv->extra_hdr_values = g_ptr_array_new ();

    priv->gconf_bridge_binding_ids = g_array_new (
        FALSE, FALSE, sizeof (guint));

    priv->inline_images = g_hash_table_new_full (
        g_str_hash, g_str_equal,
        (GDestroyNotify) g_free,
        (GDestroyNotify) NULL);

    priv->inline_images_by_url = g_hash_table_new_full (
        g_str_hash, g_str_equal,
        (GDestroyNotify) g_free,
        (GDestroyNotify) camel_object_unref);

    priv->charset = e_composer_get_default_charset ();

    e_composer_actions_init (composer);

    filename = e_composer_find_data_file ("evolution-composer.ui");
    gtk_ui_manager_add_ui_from_file (manager, filename, &error);
    g_free (filename);

    /* We set the send button as important to have a label */
    path = "/main-toolbar/pre-main-toolbar/send";
    send_widget = gtk_ui_manager_get_widget (manager, path);
    gtk_tool_item_set_is_important (GTK_TOOL_ITEM (send_widget), TRUE);

    composer_setup_charset_menu (composer);

    if (error != NULL) {
        /* Henceforth, bad things start happening. */
        g_critical ("%s", error->message);
        g_clear_error (&error);
    }

    /* Construct the header table. */

    widget = e_composer_header_table_new ();
    gtk_container_set_border_width (GTK_CONTAINER (widget), 6);
    gtk_box_pack_start (GTK_BOX (editor->vbox), widget, FALSE, FALSE, 0);
    gtk_box_reorder_child (GTK_BOX (editor->vbox), widget, 2);
    priv->header_table = g_object_ref (widget);
    gtk_widget_show (widget);

    /* Construct attachment widgets.
     * XXX Move this stuff into a new custom widget. */

    widget = gtk_expander_new (NULL);
    gtk_expander_set_expanded (GTK_EXPANDER (widget), FALSE);
    gtk_container_set_border_width (GTK_CONTAINER (widget), 6);
    gtk_box_pack_start (GTK_BOX (editor->vbox), widget, FALSE, FALSE, 0);
    priv->attachment_expander = g_object_ref (widget);
    gtk_widget_show (widget);
    expander = widget;

    widget = gtk_scrolled_window_new (NULL, NULL);
    gtk_scrolled_window_set_policy (
        GTK_SCROLLED_WINDOW (widget),
        GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
    gtk_scrolled_window_set_shadow_type (
        GTK_SCROLLED_WINDOW (widget), GTK_SHADOW_IN);
    gtk_container_add (GTK_CONTAINER (expander), widget);
    priv->attachment_scrolled_window = g_object_ref (widget);
    gtk_widget_show (widget);
    container = widget;

    widget = e_attachment_bar_new (NULL);
    GTK_WIDGET_SET_FLAGS (widget, GTK_CAN_FOCUS);
    gtk_container_add (GTK_CONTAINER (container), widget);
    priv->attachment_bar = g_object_ref (widget);
    gtk_widget_show (widget);

    widget = gtk_hbox_new (FALSE, 0);
    gtk_expander_set_label_widget (GTK_EXPANDER (expander), widget);
    gtk_widget_show (widget);
    container = widget;

    widget = gtk_label_new_with_mnemonic (_("Show _Attachment Bar"));
    gtk_misc_set_alignment (GTK_MISC (widget), 0.0, 0.5);
    gtk_box_pack_start (GTK_BOX (container), widget, TRUE, TRUE, 6);
    priv->attachment_expander_label = g_object_ref (widget);
    gtk_widget_show (widget);

    widget = gtk_image_new_from_icon_name (
        "mail-attachment", GTK_ICON_SIZE_MENU);
    gtk_misc_set_alignment (GTK_MISC (widget), 1.0, 0.5);
    gtk_widget_set_size_request (widget, 100, -1);
    gtk_box_pack_start (GTK_BOX (container), widget, TRUE, TRUE, 0);
    priv->attachment_expander_icon = g_object_ref (widget);
    gtk_widget_hide (widget);

    widget = gtk_label_new (NULL);
    gtk_label_set_use_markup (GTK_LABEL (widget), TRUE);
    gtk_misc_set_alignment (GTK_MISC (widget), 1.0, 0.5);
    gtk_box_pack_start (GTK_BOX (container), widget, FALSE, FALSE, 6);
    priv->attachment_expander_num = g_object_ref (widget);
    gtk_widget_show (widget);

    composer_setup_recent_menu (composer);
}

void
e_composer_private_dispose (EMsgComposer *composer)
{
    GConfBridge *bridge;
    GArray *array;
    guint binding_id;

    bridge = gconf_bridge_get ();
    array = composer->priv->gconf_bridge_binding_ids;

    while (array->len > 0) {
        binding_id = g_array_index (array, guint, 0);
        gconf_bridge_unbind (bridge, binding_id);
        g_array_remove_index_fast (array, 0);
    }

    if (composer->priv->header_table != NULL) {
        g_object_unref (composer->priv->header_table);
        composer->priv->header_table = NULL;
    }

    if (composer->priv->charset_actions != NULL) {
        g_object_unref (composer->priv->charset_actions);
        composer->priv->charset_actions = NULL;
    }

    if (composer->priv->composer_actions != NULL) {
        g_object_unref (composer->priv->composer_actions);
        composer->priv->composer_actions = NULL;
    }

    g_hash_table_remove_all (composer->priv->inline_images);
    g_hash_table_remove_all (composer->priv->inline_images_by_url);

    if (composer->priv->redirect != NULL) {
        camel_object_unref (composer->priv->redirect);
        composer->priv->redirect = NULL;
    }
}

void
e_composer_private_finalize (EMsgComposer *composer)
{
    GPtrArray *array;

    array = composer->priv->extra_hdr_names;
    g_ptr_array_foreach (array, (GFunc) g_free, NULL);
    g_ptr_array_free (array, TRUE);

    array = composer->priv->extra_hdr_values;
    g_ptr_array_foreach (array, (GFunc) g_free, NULL);
    g_ptr_array_free (array, TRUE);

    g_free (composer->priv->charset);
    g_free (composer->priv->mime_type);
    g_free (composer->priv->mime_body);

    g_hash_table_destroy (composer->priv->inline_images);
    g_hash_table_destroy (composer->priv->inline_images_by_url);
}

gchar *
e_composer_find_data_file (const gchar *basename)
{
    gchar *filename;

    g_return_val_if_fail (basename != NULL, NULL);

    /* Support running directly from the source tree. */
    filename = g_build_filename (".", basename, NULL);
    if (g_file_test (filename, G_FILE_TEST_EXISTS))
        return filename;
    g_free (filename);

    /* XXX This is kinda broken. */
    filename = g_build_filename (EVOLUTION_UIDIR, basename, NULL);
    if (g_file_test (filename, G_FILE_TEST_EXISTS))
        return filename;
    g_free (filename);

    g_critical ("Could not locate '%s'", basename);

    return NULL;
}

gchar *
e_composer_get_default_charset (void)
{
    GConfClient *client;
    gchar *charset;
    GError *error = NULL;

    client = gconf_client_get_default ();

    charset = gconf_client_get_string (
        client, COMPOSER_GCONF_CHARSET_KEY, &error);
    if (error != NULL) {
        g_warning ("%s", error->message);
        g_clear_error (&error);
    }

    /* See what charset the mailer is using.
     * XXX We should not have to know where this lives in GConf.
     *     Need a mail_config_get_default_charset() that does this. */
    if (!charset || charset[0] == '\0') {
        g_free (charset);
        charset = gconf_client_get_string (
            client, MAIL_GCONF_CHARSET_KEY, NULL);
        if (charset != NULL && *charset == '\0') {
            g_free (charset);
            charset = NULL;
        } else if (error != NULL) {
            g_warning ("%s", error->message);
            g_clear_error (&error);
        }
    }

    g_object_unref (client);

    if (charset == NULL)
        charset = g_strdup (camel_iconv_locale_charset ());

    if (charset == NULL)
        charset = g_strdup ("us-ascii");

    return charset;
}