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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/>
 *
 *
 * Authors:
 *      Jeffrey Stedfast <fejj@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>

#include "e-util/e-binding.h"
#include "e-util/e-signature-utils.h"
#include "e-util/gconf-bridge.h"

#include "em-composer-prefs.h"
#include "composer/e-msg-composer.h"

#include <camel/camel-iconv.h>

#include <misc/e-gui-utils.h>

#include <glib/gi18n.h>
#include <glib/gstdio.h>

#include <gtkhtml/gtkhtml.h>
#include <editor/gtkhtml-spell-language.h>

#include "e-util/e-util.h"
#include "e-util/e-util-private.h"
#include "widgets/misc/e-charset-combo-box.h"
#include "widgets/misc/e-signature-editor.h"
#include "widgets/misc/e-signature-manager.h"
#include "widgets/misc/e-signature-preview.h"

#include "mail-config.h"
#include "em-config.h"
#include "em-folder-selection-button.h"

static gpointer parent_class;

static gboolean
transform_color_to_string (const GValue *src_value,
                           GValue *dst_value,
                           gpointer user_data)
{
    const GdkColor *color;
    gchar *string;

    color = g_value_get_boxed (src_value);
    string = gdk_color_to_string (color);
    g_value_set_string (dst_value, string);
    g_free (string);

    return TRUE;
}

static gboolean
transform_string_to_color (const GValue *src_value,
                           GValue *dst_value,
                           gpointer user_data)
{
    GdkColor color;
    const gchar *string;
    gboolean success = FALSE;

    string = g_value_get_string (src_value);
    if (gdk_color_parse (string, &color)) {
        g_value_set_boxed (dst_value, &color);
        success = TRUE;
    }

    return success;
}

static gboolean
transform_old_to_new_reply_style (const GValue *src_value,
                                  GValue *dst_value,
                                  gpointer user_data)
{
    gboolean success = TRUE;

    /* XXX This is the kind of legacy crap we wind up
     *     with when we don't migrate things properly. */

    switch (g_value_get_int (src_value)) {
        case 0:  /* Quoted: 0 -> 2 */
            g_value_set_int (dst_value, 2);
            break;

        case 1:  /* Do Not Quote: 1 -> 3 */
            g_value_set_int (dst_value, 3);
            break;

        case 2:  /* Attach: 2 -> 0 */
            g_value_set_int (dst_value, 0);
            break;

        case 3:  /* Outlook: 3 -> 1 */
            g_value_set_int (dst_value, 1);
            break;

        default:
            success = FALSE;
            break;
    }

    return success;
}

static gboolean
transform_new_to_old_reply_style (const GValue *src_value,
                                  GValue *dst_value,
                                  gpointer user_data)
{
    gboolean success = TRUE;

    /* XXX This is the kind of legacy crap we wind up
     *     with when we don't migrate things properly. */

    switch (g_value_get_int (src_value)) {
        case 0:  /* Attach: 0 -> 2 */
            g_value_set_int (dst_value, 2);
            break;

        case 1:  /* Outlook: 1 -> 3 */
            g_value_set_int (dst_value, 3);
            break;

        case 2:  /* Quoted: 2 -> 0 */
            g_value_set_int (dst_value, 0);
            break;

        case 3:  /* Do Not Quote: 3 -> 1 */
            g_value_set_int (dst_value, 1);
            break;

        default:
            success = FALSE;
            break;
    }

    return success;
}

static void
composer_prefs_finalize (GObject *object)
{
    EMComposerPrefs *prefs = (EMComposerPrefs *) object;

    g_object_unref (prefs->builder);

    /* Chain up to parent's finalize() method. */
        G_OBJECT_CLASS (parent_class)->finalize (object);
}

static void
composer_prefs_class_init (EMComposerPrefsClass *class)
{
    GObjectClass *object_class;

    parent_class = g_type_class_peek_parent (class);

    object_class = G_OBJECT_CLASS (class);
    object_class->finalize = composer_prefs_finalize;
}

static void
composer_prefs_init (EMComposerPrefs *prefs)
{
}

GType
em_composer_prefs_get_type (void)
{
    static GType type = 0;

    if (G_UNLIKELY (type == 0)) {
        static const GTypeInfo type_info = {
            sizeof (EMComposerPrefsClass),
            (GBaseInitFunc) NULL,
            (GBaseFinalizeFunc) NULL,
            (GClassInitFunc) composer_prefs_class_init,
            (GClassFinalizeFunc) NULL,
            NULL,  /* class_data */
            sizeof (EMComposerPrefs),
            0,     /* n_allocs */
            (GInstanceInitFunc) composer_prefs_init,
            NULL   /* value_table */
        };

        type = g_type_register_static (
            GTK_TYPE_VBOX, "EMComposerPrefs", &type_info, 0);
    }

    return type;
}

void
em_composer_prefs_new_signature (GtkWindow *parent,
                                 gboolean html_mode)
{
    GtkWidget *editor;

    editor = e_signature_editor_new ();
    gtkhtml_editor_set_html_mode (GTKHTML_EDITOR (editor), html_mode);
    gtk_window_set_transient_for (GTK_WINDOW (editor), parent);
    gtk_widget_show (editor);
}

static void
spell_language_toggled_cb (GtkCellRendererToggle *renderer,
                           const gchar *path_string,
                           EMComposerPrefs *prefs)
{
    GtkTreeModel *model;
    GtkTreePath *path;
    GtkTreeIter iter;
    gboolean active;
    gboolean valid;

    model = prefs->language_model;

    /* Convert the path string to a tree iterator. */
    path = gtk_tree_path_new_from_string (path_string);
    valid = gtk_tree_model_get_iter (model, &iter, path);
    gtk_tree_path_free (path);
    g_return_if_fail (valid);

    /* Toggle the active state. */
    gtk_tree_model_get (model, &iter, 0, &active, -1);
    gtk_list_store_set (GTK_LIST_STORE (model), &iter, 0, !active, -1);
}

static void
spell_language_save (EMComposerPrefs *prefs)
{
    GList *spell_languages = NULL;
    GtkTreeModel *model;
    GtkTreeIter iter;
    gboolean valid;

    model = prefs->language_model;

    /* Build a list of active spell languages. */
    valid = gtk_tree_model_get_iter_first (model, &iter);
    while (valid) {
        const GtkhtmlSpellLanguage *language;
        gboolean active;

        gtk_tree_model_get (
            model, &iter, 0, &active, 2, &language, -1);

        if (active)
            spell_languages = g_list_prepend (
                spell_languages, (gpointer) language);

        valid = gtk_tree_model_iter_next (model, &iter);
    }
    spell_languages = g_list_reverse (spell_languages);

    /* Update the GConf value. */
    e_save_spell_languages (spell_languages);

    g_list_free (spell_languages);
}

static void
spell_setup (EMComposerPrefs *prefs)
{
    const GList *available_languages;
    GList *active_languages;
    GtkListStore *store;

    store = GTK_LIST_STORE (prefs->language_model);
    available_languages = gtkhtml_spell_language_get_available ();

    active_languages = e_load_spell_languages ();

    /* Populate the GtkListStore. */
    while (available_languages != NULL) {
        const GtkhtmlSpellLanguage *language;
        GtkTreeIter tree_iter;
        const gchar *name;
        gboolean active;

        language = available_languages->data;
        name = gtkhtml_spell_language_get_name (language);
        active = (g_list_find (active_languages, language) != NULL);

        gtk_list_store_append (store, &tree_iter);

        gtk_list_store_set (
            store, &tree_iter,
            0, active, 1, name, 2, language, -1);

        available_languages = available_languages->next;
    }

    g_list_free (active_languages);
}

static GtkWidget *
emcp_widget_glade (EConfig *ec,
                   EConfigItem *item,
                   GtkWidget *parent,
                   GtkWidget *old,
                   gpointer data)
{
    EMComposerPrefs *prefs = data;

    return e_builder_get_widget (prefs->builder, item->label);
}

/* plugin meta-data */
static EMConfigItem emcp_items[] = {
    { E_CONFIG_BOOK, (gchar *) "", (gchar *) "composer_toplevel", emcp_widget_glade },
    { E_CONFIG_PAGE, (gchar *) "00.general", (gchar *) "vboxComposerGeneral", emcp_widget_glade },
    { E_CONFIG_SECTION, (gchar *) "00.general/00.behavior", (gchar *) "vboxBehavior", emcp_widget_glade },
    { E_CONFIG_SECTION, (gchar *) "00.general/10.alerts", (gchar *) "vboxAlerts", emcp_widget_glade },
    { E_CONFIG_PAGE, (gchar *) "10.signatures", (gchar *) "vboxSignatures", emcp_widget_glade },
    /* signature/signatures and signature/preview parts not usable */

    { E_CONFIG_PAGE, (gchar *) "20.spellcheck", (gchar *) "vboxSpellChecking", emcp_widget_glade },
    { E_CONFIG_SECTION, (gchar *) "20.spellcheck/00.languages", (gchar *) "vbox178", emcp_widget_glade },
    { E_CONFIG_SECTION, (gchar *) "20.spellcheck/00.options", (gchar *) "vboxOptions", emcp_widget_glade },
};

static void
emcp_free (EConfig *ec, GSList *items, gpointer data)
{
    /* the prefs data is freed automagically */
    g_slist_free (items);
}

static void
em_composer_prefs_construct (EMComposerPrefs *prefs,
                             EShell *shell)
{
    GtkWidget *toplevel, *widget, *info_pixmap;
    GtkWidget *container;
    EShellSettings *shell_settings;
    ESignatureList *signature_list;
    ESignatureTreeView *signature_tree_view;
    GtkTreeView *view;
    GtkListStore *store;
    GtkTreeSelection *selection;
    GtkCellRenderer *renderer;
    GConfBridge *bridge;
    GConfClient *client;
    EMConfig *ec;
    EMConfigTargetPrefs *target;
    GSList *l;
    gint i;

    bridge = gconf_bridge_get ();
    client = mail_config_get_gconf_client ();
    shell_settings = e_shell_get_shell_settings (shell);

    /* Make sure our custom widget classes are registered with
     * GType before we load the GtkBuilder definition file. */
    EM_TYPE_FOLDER_SELECTION_BUTTON;

    prefs->builder = gtk_builder_new ();
    e_load_ui_builder_definition (prefs->builder, "mail-config.ui");

    /** @HookPoint-EMConfig: Mail Composer Preferences
     * @Id: org.gnome.evolution.mail.composerPrefs
     * @Type: E_CONFIG_BOOK
     * @Class: org.gnome.evolution.mail.config:1.0
     * @Target: EMConfigTargetPrefs
     *
     * The mail composer preferences settings page.
     */
    ec = em_config_new(E_CONFIG_BOOK, "org.gnome.evolution.mail.composerPrefs");
    l = NULL;
    for (i = 0; i < G_N_ELEMENTS (emcp_items); i++)
        l = g_slist_prepend(l, &emcp_items[i]);
    e_config_add_items((EConfig *)ec, l, NULL, NULL, emcp_free, prefs);

    /* General tab */

    /* Default Behavior */
    widget = e_builder_get_widget (prefs->builder, "chkSendHTML");
    e_mutual_binding_new (
        shell_settings, "composer-format-html",
        widget, "active");

    widget = e_builder_get_widget (prefs->builder, "chkPromptEmptySubject");
    e_mutual_binding_new (
        shell_settings, "composer-prompt-empty-subject",
        widget, "active");

    widget = e_builder_get_widget (prefs->builder, "chkPromptBccOnly");
    e_mutual_binding_new (
        shell_settings, "composer-prompt-only-bcc",
        widget, "active");

    widget = e_builder_get_widget (prefs->builder, "chkAutoSmileys");
    e_mutual_binding_new (
        shell_settings, "composer-magic-smileys",
        widget, "active");

    widget = e_builder_get_widget (prefs->builder, "chkRequestReceipt");
    e_mutual_binding_new (
        shell_settings, "composer-request-receipt",
        widget, "active");

    widget = e_builder_get_widget (prefs->builder, "chkReplyStartBottom");
    e_mutual_binding_new (
        shell_settings, "composer-reply-start-bottom",
        widget, "active");

    widget = e_builder_get_widget (prefs->builder, "chkOutlookFilenames");
    e_mutual_binding_new (
        shell_settings, "composer-outlook-filenames",
        widget, "active");

    widget = e_builder_get_widget (prefs->builder, "chkTopSignature");
    e_mutual_binding_new (
        shell_settings, "composer-top-signature",
        widget, "active");

    widget = e_builder_get_widget (prefs->builder, "chkEnableSpellChecking");
    e_mutual_binding_new (
        shell_settings, "composer-inline-spelling",
        widget, "active");

    widget = e_charset_combo_box_new ();
    container = e_builder_get_widget (prefs->builder, "hboxComposerCharset");
    gtk_box_pack_start (GTK_BOX (container), widget, FALSE, FALSE, 0);
    gtk_widget_show (widget);
    e_mutual_binding_new (
        shell_settings, "composer-charset",
        widget, "charset");

    /* Spell Checking */
    widget = e_builder_get_widget (prefs->builder, "listSpellCheckLanguage");
    view = GTK_TREE_VIEW (widget);
    store = gtk_list_store_new (
        3, G_TYPE_BOOLEAN, G_TYPE_STRING, G_TYPE_POINTER);
    g_signal_connect_swapped (
        store, "row-changed",
        G_CALLBACK (spell_language_save), prefs);
    prefs->language_model = GTK_TREE_MODEL (store);
    gtk_tree_view_set_model (view, prefs->language_model);
    renderer = gtk_cell_renderer_toggle_new ();
    g_signal_connect (
        renderer, "toggled",
        G_CALLBACK (spell_language_toggled_cb), prefs);
    gtk_tree_view_insert_column_with_attributes (
        view, -1, _("Enabled"),
        renderer, "active", 0, NULL);

    gtk_tree_view_insert_column_with_attributes (
        view, -1, _("Language(s)"),
        gtk_cell_renderer_text_new (),
        "text", 1, NULL);
    selection = gtk_tree_view_get_selection (view);
    gtk_tree_selection_set_mode (selection, GTK_SELECTION_NONE);
    info_pixmap = e_builder_get_widget (prefs->builder, "pixmapSpellInfo");
    gtk_image_set_from_stock (
        GTK_IMAGE (info_pixmap),
        GTK_STOCK_DIALOG_INFO, GTK_ICON_SIZE_BUTTON);

    widget = e_builder_get_widget (prefs->builder, "colorButtonSpellCheckColor");
    e_mutual_binding_new_full (
        shell_settings, "composer-spell-color",
        widget, "color",
        transform_string_to_color,
        transform_color_to_string,
        NULL, NULL);

    spell_setup (prefs);

    /* Forwards and Replies */
    widget = e_builder_get_widget (prefs->builder, "comboboxForwardStyle");
    e_mutual_binding_new (
        shell_settings, "mail-forward-style",
        widget, "active");

    widget = e_builder_get_widget (prefs->builder, "comboboxReplyStyle");
    e_mutual_binding_new_full (
        shell_settings, "mail-reply-style",
        widget, "active",
        transform_old_to_new_reply_style,
        transform_new_to_old_reply_style,
        NULL, NULL);

    /* Signatures */
    signature_list = e_get_signature_list ();
    container = e_builder_get_widget (prefs->builder, "alignSignatures");
    widget = e_signature_manager_new (signature_list);
    gtk_container_add (GTK_CONTAINER (container), widget);
    gtk_widget_show (widget);

    /* The mail shell backend responds to the "window-created" signal
     * that this triggers and configures it with composer preferences. */
    g_signal_connect_swapped (
        widget, "editor-created",
        G_CALLBACK (e_shell_watch_window), shell);

    e_binding_new (
        shell_settings, "composer-format-html",
        widget, "prefer-html");

    e_binding_new_with_negation (
        shell_settings, "disable-command-line",
        widget, "allow-scripts");

    signature_tree_view = e_signature_manager_get_tree_view (
        E_SIGNATURE_MANAGER (widget));

    container = e_builder_get_widget (prefs->builder, "scrolled-sig");
    widget = e_signature_preview_new ();
    gtk_container_add (GTK_CONTAINER (container), widget);
    gtk_widget_show (widget);

    e_binding_new_with_negation (
        shell_settings, "disable-command-line",
        widget, "allow-scripts");

    e_binding_new (
        signature_tree_view, "selected",
        widget, "signature");

    /* get our toplevel widget */
    target = em_config_target_new_prefs (ec, client);
    e_config_set_target ((EConfig *)ec, (EConfigTarget *)target);
    toplevel = e_config_create_widget ((EConfig *)ec);
    gtk_container_add (GTK_CONTAINER (prefs), toplevel);
}

GtkWidget *
em_composer_prefs_new (EShell *shell)
{
    EMComposerPrefs *prefs;

    g_return_val_if_fail (E_IS_SHELL (shell), NULL);

    prefs = g_object_new (EM_TYPE_COMPOSER_PREFS, NULL);
    em_composer_prefs_construct (prefs, shell);

    return GTK_WIDGET (prefs);
}