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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., 59 Temple Street #330, Boston, MA 02111-1307, USA.
 *
 */


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

#include <gtk/gtkscrolledwindow.h>
#include <gtk/gtkbutton.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 "em-format-html-display.h"
#include "em-message-browser.h"

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


#define DEFAULT_WIDTH  600
#define DEFAULT_HEIGHT 400

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

static void emmb_set_message(EMFolderView *emfv, const char *uid);
static void emmb_activate(EMFolderView *emfv, BonoboUIComponent *uic, int state);

static EMFolderViewClass *emmb_parent;

static void
emmb_init(GObject *o)
{
    EMMessageBrowser *emmb = (EMMessageBrowser *)o;
    struct _EMMessageBrowserPrivate *p;

    p = emmb->priv = g_malloc0(sizeof(struct _EMMessageBrowserPrivate));

    ((EMFolderView *)emmb)->preview_active = TRUE;

    g_slist_free(emmb->view.ui_files);
    emmb->view.ui_files = g_slist_append(NULL, EVOLUTION_UIDIR "/evolution-mail-messagedisplay.xml");
    emmb->view.ui_files = g_slist_append(emmb->view.ui_files, EVOLUTION_UIDIR "/evolution-mail-message.xml");

    /* currently: just use a scrolledwindow for preview widget */
    p->preview = gtk_scrolled_window_new(NULL, NULL);
    gtk_scrolled_window_set_policy((GtkScrolledWindow *)p->preview, GTK_POLICY_AUTOMATIC, GTK_POLICY_ALWAYS);
    gtk_scrolled_window_set_shadow_type((GtkScrolledWindow *)p->preview, GTK_SHADOW_IN);
    gtk_widget_show(p->preview);

    gtk_container_add((GtkContainer *)p->preview, (GtkWidget *)emmb->view.preview->formathtml.html);
    gtk_widget_show((GtkWidget *)emmb->view.preview->formathtml.html);

    gtk_widget_show(p->preview);

    gtk_box_pack_start_defaults((GtkBox *)emmb, p->preview);
}

static void
emmb_finalise(GObject *o)
{
    EMMessageBrowser *emmb = (EMMessageBrowser *)o;

    g_free(emmb->priv);
    ((GObjectClass *)emmb_parent)->finalize(o);
}

static void
emmb_destroy(GtkObject *o)
{
    EMMessageBrowser *emmb = (EMMessageBrowser *)o;

    if (emmb->view.list) {
        gtk_widget_destroy((GtkWidget *)emmb->view.list);
        emmb->view.list = NULL;
    }

    ((GtkObjectClass *)emmb_parent)->destroy(o);
}

static void
emmb_class_init(GObjectClass *klass)
{
    klass->finalize = emmb_finalise;
    
    ((GtkObjectClass *)klass)->destroy = emmb_destroy;
    
    ((EMFolderViewClass *) klass)->update_message_style = FALSE;
    
    ((EMFolderViewClass *)klass)->set_message = emmb_set_message;
    ((EMFolderViewClass *)klass)->activate = emmb_activate;
}

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

    if (type == 0) {
        static const GTypeInfo info = {
            sizeof(EMMessageBrowserClass),
            NULL, NULL,
            (GClassInitFunc)emmb_class_init,
            NULL, NULL,
            sizeof(EMMessageBrowser), 0,
            (GInstanceInitFunc)emmb_init
        };
        emmb_parent = g_type_class_ref(em_folder_view_get_type());
        type = g_type_register_static(em_folder_view_get_type(), "EMMessageBrowser", &info, 0);
    }

    return type;
}

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

static void
window_size_allocate (GtkWidget *widget, GtkAllocation *allocation)
{
    GConfClient *gconf;
    
    /* save to in-memory variable for current session access */
    window_size = *allocation;
    
    /* save the setting across sessions */
    gconf = gconf_client_get_default ();
    gconf_client_set_int (gconf, "/apps/evolution/mail/message_window/width", window_size.width, NULL);
    gconf_client_set_int (gconf, "/apps/evolution/mail/message_window/height", window_size.height, NULL);
    g_object_unref (gconf);
}

static void
emmb_list_message_selected (struct _MessageList *ml, const char *uid, EMMessageBrowser *emmb)
{
    EMFolderView *emfv = (EMFolderView *) emmb;
    CamelMessageInfo *info;
    
    if (uid && (info = camel_folder_get_message_info (emfv->folder, uid))) {
        gtk_window_set_title ((GtkWindow *) emmb->window, camel_message_info_subject (info));
        gtk_widget_grab_focus ((GtkWidget *) (emmb->view.preview->formathtml.html));
        camel_folder_free_message_info (emfv->folder, info);
    }
}

GtkWidget *em_message_browser_new(void)
{
    EMMessageBrowser *emmb = g_object_new(em_message_browser_get_type(), 0);

    return (GtkWidget *)emmb;
}

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

    emmb = (EMMessageBrowser *)em_message_browser_new();
    gtk_widget_show((GtkWidget *)emmb);
    /* FIXME: title set elsewhere? */
    emmb->window = g_object_new(bonobo_window_get_type(), "title", "Ximian Evolution", NULL);
    bonobo_window_set_contents((BonoboWindow *)emmb->window, (GtkWidget *)emmb);

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

    em_folder_view_activate((EMFolderView *)emmb, uic, TRUE);
    
    if (window_size.width == 0) {
        /* initialize @window_size with the previous session's size */
        GConfClient *gconf;
        GError *err = NULL;
        
        gconf = gconf_client_get_default ();
        
        window_size.width = gconf_client_get_int (gconf, "/apps/evolution/mail/message_window/width", &err);
        if (err != NULL) {
            window_size.width = DEFAULT_WIDTH;
            g_clear_error (&err);
        }
        
        window_size.height = gconf_client_get_int (gconf, "/apps/evolution/mail/message_window/height", &err);
        if (err != NULL) {
            window_size.height = DEFAULT_HEIGHT;
            g_clear_error (&err);
        }
        
        g_object_unref (gconf);
    }
    
    gtk_window_set_default_size ((GtkWindow *) emmb->window, window_size.width, window_size.height);
    g_signal_connect (emmb->window, "size-allocate", G_CALLBACK (window_size_allocate), NULL);
    g_signal_connect (((EMFolderView *) emmb)->list, "message_selected", G_CALLBACK (emmb_list_message_selected), emmb);
    
    /* cleanup? */

    return (GtkWidget *)emmb;
}

/* ********************************************************************** */

static void
emmb_set_message(EMFolderView *emfv, const char *uid)
{
    EMMessageBrowser *emmb = (EMMessageBrowser *) emfv;
    CamelMessageInfo *info;
    
    emmb_parent->set_message(emfv, uid);
    
    if (uid == NULL)
        return;
    
    if ((info = camel_folder_get_message_info (emfv->folder, uid))) {
        gtk_window_set_title ((GtkWindow *) 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 ... */
    camel_folder_set_message_flags(emfv->folder, uid, CAMEL_MESSAGE_SEEN, CAMEL_MESSAGE_SEEN);
}

static void
emmb_close(BonoboUIComponent *uid, void *data, const char *path)
{
    EMMessageBrowser *emmb = data;

    gtk_widget_destroy(gtk_widget_get_toplevel((GtkWidget *)emmb));
}

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

static void
emmb_activate(EMFolderView *emfv, BonoboUIComponent *uic, int state)
{
    if (state) {
        emmb_parent->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 *v;
        
        for (v = &emmb_verbs[0]; v->cname; v++)
            bonobo_ui_component_remove_verb(uic, v->cname);

        emmb_parent->activate(emfv, uic, state);
    }
}