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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 *  Authors: Michael Zucchi <notzed@ximian.com>
 *
 *  Copyright 2003 Ximian, Inc. (www.ximian.com)
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 */

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

#include <glib.h>
#ifdef G_OS_WIN32
/* Work around 'DATADIR' and 'interface' lossage in <windows.h> */
#define DATADIR crap_DATADIR
#include <windows.h>
#undef DATADIR
#undef interface
#endif

#include <gdk/gdkkeysyms.h>

#include <gconf/gconf-client.h>

#include <camel/camel-folder.h>

#include <bonobo/bonobo-main.h>
#include <bonobo/bonobo-object.h>
#include <bonobo/bonobo-window.h>
#include <bonobo/bonobo-generic-factory.h>
#include <bonobo/bonobo-ui-component.h>
#include <bonobo/bonobo-ui-util.h>

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

#include "em-format-html-display.h"
#include "em-message-browser.h"
#include "em-menu.h"

#include "evolution-shell-component-utils.h" /* Pixmap stuff, sigh */

#define EM_MESSAGE_BROWSER_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), EM_TYPE_MESSAGE_BROWSER, EMMessageBrowserPrivate))

#define DEFAULT_WIDTH  600
#define DEFAULT_HEIGHT 400

struct _EMMessageBrowserPrivate {
    GtkWidget *preview; /* container for message display */
};

static gpointer parent_class;
static GtkAllocation window_size = { 0, 0, 0, 0 };

static void
emmb_close (BonoboUIComponent *uid,
            gpointer data,
            const gchar *path)
{
    EMMessageBrowser *emmb = data;
    GtkWidget *toplevel;

    toplevel = gtk_widget_get_toplevel (GTK_WIDGET (emmb));
    gtk_widget_destroy (toplevel);
}

static BonoboUIVerb emmb_verbs[] = {
    BONOBO_UI_UNSAFE_VERB ("MessageBrowserClose", emmb_close),
    BONOBO_UI_VERB_END
};

static void
emmb_set_message (EMFolderView *emfv,
                  const gchar *uid,
                  gint nomarkseen)
{
    EMMessageBrowser *emmb = EM_MESSAGE_BROWSER (emfv);
    EMFolderViewClass *folder_view_class;
    CamelMessageInfo *info;

    /* Chain up to parent's set_message() method. */
    folder_view_class = EM_FOLDER_VIEW_CLASS (parent_class);
    folder_view_class->set_message (emfv, uid, nomarkseen);

    if (uid == NULL) {
        gtk_widget_destroy (GTK_WIDGET (emfv));
        return;
    }

    info = camel_folder_get_message_info (emfv->folder, uid);

    if (info != NULL) {
        gtk_window_set_title (
            GTK_WINDOW (emmb->window),
            camel_message_info_subject (info));
        camel_folder_free_message_info (emfv->folder, info);
    }

    /* Well we don't know if it got displayed (yet) ... but whatever ... */
    if (!nomarkseen)
        camel_folder_set_message_flags (
            emfv->folder, uid,
            CAMEL_MESSAGE_SEEN, CAMEL_MESSAGE_SEEN);
}

static void
emmb_activate (EMFolderView *emfv,
               BonoboUIComponent *uic,
               gint state)
{
    EMFolderViewClass *folder_view_class;

    folder_view_class = EM_FOLDER_VIEW_CLASS (parent_class);

    if (state) {
        /* Chain up to parent's activate() method. */
        folder_view_class->activate (emfv, uic, state);

        bonobo_ui_component_add_verb_list_with_data (
            uic, emmb_verbs, emfv);
        bonobo_ui_component_set_prop(
            uic, "/commands/EditPaste", "sensitive", "0", NULL);
    } else {
        const BonoboUIVerb *verb;

        for (verb = &emmb_verbs[0]; verb->cname; verb++)
            bonobo_ui_component_remove_verb (uic, verb->cname);

        /* Chain up to parent's activate() method. */
        folder_view_class->activate (emfv, uic, state);
    }
}

static void
emmb_list_message_selected_cb (struct _MessageList *ml,
                               const gchar *uid,
                               EMMessageBrowser *emmb)
{
    EMFolderView *emfv = EM_FOLDER_VIEW (emmb);
    CamelMessageInfo *info;

    if (uid == NULL)
        return;

    info = camel_folder_get_message_info (emfv->folder, uid);
    if (info == NULL)
        return;

    gtk_window_set_title (
        GTK_WINDOW (emmb->window),
        camel_message_info_subject (info));
    gtk_widget_grab_focus (
        GTK_WIDGET (emfv->preview->formathtml.html));

    camel_folder_free_message_info (emfv->folder, info);
}

static void
emmb_window_size_allocate (GtkWidget *widget,
                           GtkAllocation *allocation)
{
    GConfClient *client;

    /* FIXME Have GConfBridge handle this. */

    /* save to in-memory variable for current session access */
    window_size = *allocation;

    /* save the setting across sessions */
    client = gconf_client_get_default ();
    gconf_client_set_int (
        client, "/apps/evolution/mail/message_window/width",
        window_size.width, NULL);
    gconf_client_set_int (
        client, "/apps/evolution/mail/message_window/height",
        window_size.height, NULL);
    g_object_unref (client);
}

static int
emmb_key_press_event_cb (EMMessageBrowser *emmb,
                         GdkEventKey *event)
{
    if (event->keyval == GDK_Escape) {
        GtkWidget *toplevel;

        toplevel = gtk_widget_get_toplevel (GTK_WIDGET (emmb));
        gtk_widget_destroy (toplevel);
        g_signal_stop_emission_by_name (emmb, "key-press-event");

        return TRUE;
    }

    return FALSE;
}

static void
emmb_destroy (GtkObject *gtk_object)
{
    EMFolderView *emfv = EM_FOLDER_VIEW (gtk_object);

    if (emfv->list) {
        gtk_widget_destroy (GTK_WIDGET (emfv->list));
        emfv->list = NULL;
    }

    /* Chain up to parent's destroy() method. */
    GTK_OBJECT_CLASS (parent_class)->destroy (gtk_object);
}

static void
emmb_class_init (EMMessageBrowserClass *class)
{
    GtkObjectClass *gtk_object_class;
    EMFolderViewClass *folder_view_class;

    parent_class = g_type_class_peek_parent (class);
    g_type_class_add_private (class, sizeof (EMMessageBrowserPrivate));

    gtk_object_class = GTK_OBJECT_CLASS (class);
    gtk_object_class->destroy = emmb_destroy;

    folder_view_class = EM_FOLDER_VIEW_CLASS (class);
    folder_view_class->update_message_style = FALSE;
    folder_view_class->set_message = emmb_set_message;
    folder_view_class->activate = emmb_activate;
}

static void
emmb_init (EMMessageBrowser *emmb)
{
    EMFolderView *emfv = EM_FOLDER_VIEW (emmb);
    GtkWidget *widget;
    gchar *filename;

    emmb->priv = EM_MESSAGE_BROWSER_GET_PRIVATE (emmb);

    emfv->preview_active = TRUE;

    g_slist_foreach (emfv->ui_files, (GFunc) g_free, NULL);
    g_slist_free (emfv->ui_files);
    emfv->ui_files = NULL;

    filename = g_build_filename (
        EVOLUTION_UIDIR, "evolution-mail-messagedisplay.xml", NULL);
    emfv->ui_files = g_slist_append (emfv->ui_files, filename);

    filename = g_build_filename (
        EVOLUTION_UIDIR, "evolution-mail-message.xml", NULL);
    emfv->ui_files = g_slist_append (emfv->ui_files, filename);

    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_widget_show (widget);
    emmb->priv->preview = widget;

    widget = GTK_WIDGET (emfv->preview->formathtml.html);
    gtk_container_add (GTK_CONTAINER (emmb->priv->preview), widget);
    gtk_widget_show (widget);

    gtk_box_pack_start (
        GTK_BOX (emmb), emmb->priv->preview, TRUE, TRUE, 0);
    gtk_box_pack_start(
        GTK_BOX (emmb), em_format_html_get_search_dialog (
        emfv->preview), FALSE, FALSE, 0);

    /** @HookPoint-EMMenu: Standalone Message View Menu
     * @Id: org.gnome.evolution.mail.messagebrowser
     * @Class: org.gnome.evolution.mail.bonobomenu:1.0
     * @Target: EMMenuTargetSelect
     *
     * The main menu of standalone message viewer.
     */
    EM_FOLDER_VIEW (emmb)->menu =
        em_menu_new ("org.gnome.evolution.mail.messagebrowser");
}

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

    if (G_UNLIKELY (type == 0)) {
        static const GTypeInfo type_info = {
            sizeof (EMMessageBrowserClass),
            (GBaseInitFunc) NULL,
            (GBaseFinalizeFunc) NULL,
            (GClassInitFunc) emmb_class_init,
            (GClassFinalizeFunc) NULL,
            NULL,  /* class_data */
            sizeof (EMMessageBrowser),
            0,     /* n_preallocs */
            (GInstanceInitFunc) emmb_init,
            NULL   /* value_table */
        };

        type = g_type_register_static (
            EM_TYPE_FOLDER_VIEW, "EMMessageBrowser",
            &type_info, 0);
    }

    return type;
}

GtkWidget *
em_message_browser_new (void)
{
    return g_object_new (EM_TYPE_MESSAGE_BROWSER, NULL);
}

GtkWidget *
em_message_browser_window_new (void)
{
    EMMessageBrowser *emmb;
    BonoboUIContainer *uicont;
    BonoboUIComponent *uic;

    emmb = (EMMessageBrowser *) em_message_browser_new ();
    gtk_widget_show (GTK_WIDGET (emmb));

    /* FIXME: title set elsewhere? */
    emmb->window = g_object_new (
        BONOBO_TYPE_WINDOW, "title", "Evolution", NULL);
    bonobo_window_set_contents (
        BONOBO_WINDOW (emmb->window), GTK_WIDGET (emmb));

    uic = bonobo_ui_component_new_default ();
    uicont = bonobo_window_get_ui_container (BONOBO_WINDOW (emmb->window));
    bonobo_ui_component_set_container (uic, BONOBO_OBJREF (uicont), NULL);

    em_folder_view_activate (EM_FOLDER_VIEW (emmb), uic, TRUE);

    if (window_size.width == 0) {
        /* initialize @window_size with the previous session's size */

        /* FIXME Have GConfBridge handle this. */

        GConfClient *client;
        GError *error = NULL;

        client = gconf_client_get_default ();

        window_size.width = gconf_client_get_int (
            client, "/apps/evolution/mail/message_window/width",
            &error);
        if (error != NULL) {
            window_size.width = DEFAULT_WIDTH;
            g_clear_error (&error);
        }

        window_size.height = gconf_client_get_int (
            client, "/apps/evolution/mail/message_window/height",
            &error);
        if (error != NULL) {
            window_size.height = DEFAULT_HEIGHT;
            g_clear_error (&error);
        }

        g_object_unref (client);
    }

    gtk_window_set_default_size (
        GTK_WINDOW (emmb->window),
        window_size.width, window_size.height);

    g_signal_connect (
        emmb->window, "size-allocate",
        G_CALLBACK (emmb_window_size_allocate), NULL);
    g_signal_connect (
        EM_FOLDER_VIEW (emmb)->list, "message_selected",
        G_CALLBACK (emmb_list_message_selected_cb), emmb);
    g_signal_connect (
        emmb, "key-press-event",
        G_CALLBACK (emmb_key_press_event_cb), NULL);

    /* cleanup? */

    return GTK_WIDGET (emmb);
}