path: root/mail/folder-browser.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * folder-browser.c: Folder browser top level component
 *
 * Author:
 *   Miguel de Icaza (miguel@kernel.org)
 *
 * (C) 2000, 2001 Ximian, Inc.
 */

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

#include <ctype.h>
#include <errno.h>

#include <gdk/gdkkeysyms.h>
#include <gtk/gtkinvisible.h>
#include <gal/e-paned/e-vpaned.h>
#include <gal/e-table/e-table.h>
#include <gal/util/e-util.h>
#include <gal/widgets/e-gui-utils.h>
#include <gal/widgets/e-popup-menu.h>
#include <gal/widgets/e-unicode.h>

#include <libgnomeui/gnome-dialog-util.h>

#include <gtkhtml/htmlengine.h>

#include "filter/vfolder-rule.h"
#include "filter/vfolder-context.h"
#include "filter/filter-option.h"
#include "filter/filter-input.h"

#include "mail-search-dialogue.h"
#include "e-util/e-sexp.h"
#include "folder-browser.h"
#include "e-searching-tokenizer.h"
#include "mail.h"
#include "mail-callbacks.h"
#include "mail-tools.h"
#include "message-list.h"
#include "mail-ops.h"
#include "mail-vfolder.h"
#include "mail-autofilter.h"
#include "mail-mt.h"
#include "mail-folder-cache.h"

#include "mail-local.h"
#include "mail-config.h"

#include <camel/camel-vtrash-folder.h>
#include <camel/camel-mime-message.h>
#include <camel/camel-stream-mem.h>

#define d(x)

#define PARENT_TYPE (gtk_table_get_type ())

#define X_EVOLUTION_MESSAGE_TYPE "x-evolution-message"
#define MESSAGE_RFC822_TYPE      "message/rfc822"
#define TEXT_URI_LIST_TYPE       "text/uri-list"
#define TEXT_PLAIN_TYPE          "text/plain"

/* Drag & Drop types */
enum DndTargetType {
    DND_TARGET_TYPE_X_EVOLUTION_MESSAGE,
    DND_TARGET_TYPE_MESSAGE_RFC822,
    DND_TARGET_TYPE_TEXT_URI_LIST,
};

static GtkTargetEntry drag_types[] = {
    { X_EVOLUTION_MESSAGE_TYPE, 0, DND_TARGET_TYPE_X_EVOLUTION_MESSAGE },
    { MESSAGE_RFC822_TYPE, 0, DND_TARGET_TYPE_MESSAGE_RFC822 },
    { TEXT_URI_LIST_TYPE, 0, DND_TARGET_TYPE_TEXT_URI_LIST },
};

static const int num_drag_types = sizeof (drag_types) / sizeof (drag_types[0]);

enum PasteTargetType {
    PASTE_TARGET_TYPE_X_EVOLUTION_MESSAGE,
    PASTE_TARGET_TYPE_TEXT_PLAIN,
};

static GtkTargetPair paste_types[] = {
    { 0, 0, PASTE_TARGET_TYPE_X_EVOLUTION_MESSAGE },
    { GDK_SELECTION_TYPE_STRING, 0, PASTE_TARGET_TYPE_TEXT_PLAIN },
};

static const int num_paste_types = sizeof (paste_types) / sizeof (paste_types[0]);

static GdkAtom clipboard_atom = GDK_NONE;

static GtkObjectClass *folder_browser_parent_class;

enum {
    FOLDER_LOADED,
    MESSAGE_LOADED,
    LAST_SIGNAL
};

static guint folder_browser_signals [LAST_SIGNAL] = {0, };

static void
folder_browser_destroy (GtkObject *object)
{
    FolderBrowser *folder_browser;
    CORBA_Environment ev;
    
    folder_browser = FOLDER_BROWSER (object);
    
    CORBA_exception_init (&ev);
    
    if (folder_browser->search_full)
        gtk_object_unref (GTK_OBJECT (folder_browser->search_full));
    
    if (folder_browser->shell != CORBA_OBJECT_NIL)
        CORBA_Object_release (folder_browser->shell, &ev);

    if (folder_browser->uicomp)
        bonobo_object_unref (BONOBO_OBJECT (folder_browser->uicomp));
    
    g_free (folder_browser->uri);
    
    if (folder_browser->folder) {
        mail_sync_folder (folder_browser->folder, NULL, NULL);
        camel_object_unref (CAMEL_OBJECT (folder_browser->folder));
    }
    
    if (folder_browser->message_list)
        gtk_widget_destroy (GTK_WIDGET (folder_browser->message_list));
    
    if (folder_browser->mail_display)
        gtk_widget_destroy (GTK_WIDGET (folder_browser->mail_display));
    
    CORBA_exception_free (&ev);
    
    if (folder_browser->view_collection) {
        gtk_object_unref (GTK_OBJECT (folder_browser->view_collection));
        folder_browser->view_collection = NULL;
    }
    
    if (folder_browser->view_menus) {
        gtk_object_unref (GTK_OBJECT (folder_browser->view_menus));
        folder_browser->view_menus = NULL;
    }
    
    gtk_object_unref (GTK_OBJECT (folder_browser->invisible));
    if (folder_browser->clipboard_selection)
        g_byte_array_free (folder_browser->clipboard_selection, TRUE);
    
    folder_browser_parent_class->destroy (object);
}

static void
folder_browser_class_init (GtkObjectClass *object_class)
{
    object_class->destroy = folder_browser_destroy;
    
    folder_browser_parent_class = gtk_type_class (PARENT_TYPE);
    
    folder_browser_signals[FOLDER_LOADED] =
        gtk_signal_new ("folder_loaded",
                GTK_RUN_LAST,
                object_class->type,
                GTK_SIGNAL_OFFSET (FolderBrowserClass, folder_loaded),
                gtk_marshal_NONE__STRING,
                GTK_TYPE_NONE, 1, GTK_TYPE_STRING);
    
    folder_browser_signals[MESSAGE_LOADED] =
        gtk_signal_new ("message_loaded",
                GTK_RUN_LAST,
                object_class->type,
                GTK_SIGNAL_OFFSET (FolderBrowserClass, message_loaded),
                gtk_marshal_NONE__STRING,
                GTK_TYPE_NONE, 1, GTK_TYPE_STRING);
    
    gtk_object_class_add_signals (object_class, folder_browser_signals, LAST_SIGNAL);
    
    /* clipboard atom */
    if (!clipboard_atom)
        clipboard_atom = gdk_atom_intern ("CLIPBOARD", FALSE);
    
    if (!paste_types[0].target)
        paste_types[0].target = gdk_atom_intern (X_EVOLUTION_MESSAGE_TYPE, FALSE);
}

static void
add_uid (MessageList *ml, const char *uid, gpointer data)
{
    g_ptr_array_add ((GPtrArray *) data, g_strdup (uid));
}

static void
message_list_drag_data_get (ETree *tree, int row, ETreePath path, int col,
                GdkDragContext *context, GtkSelectionData *selection_data,
                guint info, guint time, gpointer user_data)
{
    FolderBrowser *fb = FOLDER_BROWSER (user_data);
    GPtrArray *uids = NULL;
    int i;
    
    uids = g_ptr_array_new ();
    message_list_foreach (fb->message_list, add_uid, uids);
    
    switch (info) {
    case DND_TARGET_TYPE_TEXT_URI_LIST:
    {
        char *uri_list, *tmpdir, *tmpl;
        CamelMimeMessage *message;
        const char *filename;
        CamelStream *stream;
        int fd;
        
        tmpl = g_strdup ("/tmp/evolution.XXXXXX");
#ifdef HAVE_MKDTEMP
        tmpdir = mkdtemp (tmpl);
#else
        tmpdir = mktemp (tmpl);
        if (tmpdir) {
            if (mkdir (tmpdir, S_IRWXU) == -1)
                tmpdir = NULL;
        }
#endif
        if (!tmpdir) {
            char *msg = g_strdup_printf (_("Could not create temporary "
                               "directory: %s"),
                             g_strerror (errno));
            gnome_error_dialog (msg);
            /* cleanup and abort */
            for (i = 0; i < uids->len; i++)
                g_free (uids->pdata[i]);
            g_ptr_array_free (uids, TRUE);
            g_free (tmpl);
            return;
        }
        
        message = camel_folder_get_message (fb->folder, uids->pdata[0], NULL);
        g_free (uids->pdata[0]);
        
        if (uids->len == 1) {
            filename = camel_mime_message_get_subject (message);
            if (!filename)
                filename = "Unknown";
        } else
            filename = "mbox";
        
        uri_list = g_strdup_printf ("file://%s/%s", tmpdir, filename);
        
        fd = open (uri_list + 7, O_WRONLY | O_CREAT, 0600);
        if (fd == -1) {
            /* cleanup and abort */
            camel_object_unref (CAMEL_OBJECT (message));
            for (i = 1; i < uids->len; i++)
                g_free (uids->pdata[i]);
            g_ptr_array_free (uids, TRUE);
            g_free (uri_list);
            return;
        }
        
        stream = camel_stream_fs_new_with_fd (fd);
        
        camel_stream_write (stream, "From - \n", 8);
        camel_data_wrapper_write_to_stream (CAMEL_DATA_WRAPPER (message), stream);
        camel_object_unref (CAMEL_OBJECT (message));
        for (i = 1; i < uids->len; i++) {
            message = camel_folder_get_message (fb->folder, uids->pdata[i], NULL);
            camel_stream_write (stream, "From - \n", 8);
            camel_data_wrapper_write_to_stream (CAMEL_DATA_WRAPPER (message), stream);
            camel_object_unref (CAMEL_OBJECT (message));
            g_free (uids->pdata[i]);
        }
        
        camel_object_unref (CAMEL_OBJECT (stream));
        
        gtk_selection_data_set (selection_data, selection_data->target, 8,
                    uri_list, strlen (uri_list));
        g_free (uri_list);
    }
    break;
    case DND_TARGET_TYPE_MESSAGE_RFC822:
    {
        /* FIXME: this'll be fucking slow for the user... pthread this? */
        CamelStream *stream;
        GByteArray *bytes;
        
        bytes = g_byte_array_new ();
        stream = camel_stream_mem_new ();
        camel_stream_mem_set_byte_array (CAMEL_STREAM_MEM (stream), bytes);
        
        for (i = 0; i < uids->len; i++) {
            CamelMimeMessage *message;
            
            message = camel_folder_get_message (fb->folder, uids->pdata[i], NULL);
            g_free (uids->pdata[i]);
            
            if (message) {          
                camel_stream_write (stream, "From - \n", 8);
                camel_data_wrapper_write_to_stream (CAMEL_DATA_WRAPPER (message), stream);
                camel_object_unref (CAMEL_OBJECT (message));
            }
        }
        
        g_ptr_array_free (uids, TRUE);
        camel_object_unref (CAMEL_OBJECT (stream));
        
        gtk_selection_data_set (selection_data, selection_data->target, 8,
                    bytes->data, bytes->len);
        
        g_byte_array_free (bytes, FALSE);
    }
    break;
    case DND_TARGET_TYPE_X_EVOLUTION_MESSAGE:
    {
        GByteArray *array;
        
        /* format: "uri uid1\0uid2\0uid3\0...\0uidn" */
        
        /* write the uri portion */
        array = g_byte_array_new ();
        g_byte_array_append (array, fb->uri, strlen (fb->uri));
        g_byte_array_append (array, " ", 1);
        
        /* write the uids */
        for (i = 0; i < uids->len; i++) {
            g_byte_array_append (array, uids->pdata[i], strlen (uids->pdata[i]));
            g_free (uids->pdata[i]);
            
            if (i + 1 < uids->len)
                g_byte_array_append (array, "", 1);
        }
        
        g_ptr_array_free (uids, TRUE);
        
        gtk_selection_data_set (selection_data, selection_data->target, 8,
                    array->data, array->len);
        
        g_byte_array_free (array, FALSE);
    }
    break;
    default:
        for (i = 0; i < uids->len; i++)
            g_free (uids->pdata[i]);
        
        g_ptr_array_free (uids, TRUE);
        break;
    }
}

static void
message_rfc822_dnd (CamelFolder *dest, CamelStream *stream, CamelException *ex)
{
    CamelMimeParser *mp;
    
    mp = camel_mime_parser_new ();
    camel_mime_parser_scan_from (mp, TRUE);
    camel_mime_parser_init_with_stream (mp, stream);
    
    while (camel_mime_parser_step (mp, 0, 0) == HSCAN_FROM) {
        CamelMessageInfo *info;
        CamelMimeMessage *msg;
        
        msg = camel_mime_message_new ();
        if (camel_mime_part_construct_from_parser (CAMEL_MIME_PART (msg), mp) == -1) {
            camel_object_unref (CAMEL_OBJECT (msg));
            break;
        }
        
        /* append the message to the folder... */
        info = g_new0 (CamelMessageInfo, 1);
        camel_folder_append_message (dest, msg, info, ex);
        camel_object_unref (CAMEL_OBJECT (msg));
        
        if (camel_exception_is_set (ex))
            break;
        
        /* skip over the FROM_END state */
        camel_mime_parser_step (mp, 0, 0);
    }
    
    camel_object_unref (CAMEL_OBJECT (mp));
}

static CamelFolder *
x_evolution_message_parse (char *in, unsigned int inlen, GPtrArray **uids)
{
    /* format: "uri uid1\0uid2\0uid3\0...\0uidn" */
    char *inptr, *inend, *uri;
    CamelFolder *folder;
    
    if (in == NULL)
        return NULL;
    
    inend = in + inlen;
    
    inptr = strchr (in, ' ');
    uri = g_strndup (in, inptr - in);
    
    folder = mail_tool_uri_to_folder (uri, NULL);
    g_free (uri);
    
    if (!folder)
        return NULL;
    
    /* split the uids */
    inptr++;
    *uids = g_ptr_array_new ();
    while (inptr < inend) {
        char *start = inptr;
        
        while (inptr < inend && *inptr)
            inptr++;
        
        g_ptr_array_add (*uids, g_strndup (start, inptr - start));
        inptr++;
    }
    
    return folder;
}

static void
message_list_drag_data_recieved (ETree *tree, int row, ETreePath path, int col,
                 GdkDragContext *context, gint x, gint y,
                 GtkSelectionData *selection_data, guint info,
                 guint time, gpointer user_data)
{
    FolderBrowser *fb = FOLDER_BROWSER (user_data);
    CamelFolder *folder = NULL;
    char *tmp, *url, **urls;
    GPtrArray *uids = NULL;
    CamelStream *stream;
    CamelException ex;
    CamelURL *uri;
    int i, fd;
    
    camel_exception_init (&ex);
    
    switch (info) {
    case DND_TARGET_TYPE_TEXT_URI_LIST:
        tmp = g_strndup (selection_data->data, selection_data->length);
        urls = g_strsplit (tmp, "\n", 0);
        g_free (tmp);
        
        for (i = 0; urls[i] != NULL; i++) {
            /* get the path component */
            url = g_strstrip (urls[i]);
            
            uri = camel_url_new (url, NULL);
            g_free (url);
            url = uri->path;
            uri->path = NULL;
            camel_url_free (uri);
            
            fd = open (url, O_RDONLY);
            if (fd == -1) {
                g_free (url);
                /* FIXME: okay, what do we do in this case? */
                continue;
            }
            
            stream = camel_stream_fs_new_with_fd (fd);
            message_rfc822_dnd (fb->folder, stream, &ex);
            camel_object_unref (CAMEL_OBJECT (stream));
            
            if (context->action == GDK_ACTION_MOVE && !camel_exception_is_set (&ex))
                unlink (url);
            
            g_free (url);
        }
        
        g_free (urls);
        break;
    case DND_TARGET_TYPE_MESSAGE_RFC822:
        /* write the message(s) out to a CamelStream so we can use it */
        stream = camel_stream_mem_new ();
        camel_stream_write (stream, selection_data->data, selection_data->length);
        camel_stream_reset (stream);
        
        message_rfc822_dnd (fb->folder, stream, &ex);
        camel_object_unref (CAMEL_OBJECT (stream));
        break;
    case DND_TARGET_TYPE_X_EVOLUTION_MESSAGE:
        folder = x_evolution_message_parse (selection_data->data, selection_data->length, &uids);
        if (folder == NULL)
            goto fail;
        
        if (uids == NULL) {
            camel_object_unref (CAMEL_OBJECT (folder));
            goto fail;
        }
        
        mail_transfer_messages (folder, uids, context->action == GDK_ACTION_MOVE,
                    fb->uri, NULL, NULL);
        
        camel_object_unref (CAMEL_OBJECT (folder));
        break;
    }
    
    camel_exception_clear (&ex);
    
    gtk_drag_finish (context, TRUE, TRUE, GDK_CURRENT_TIME);
    
 fail:
    camel_exception_clear (&ex);
    
    gtk_drag_finish (context, FALSE, TRUE, GDK_CURRENT_TIME);
}

static void
selection_get (GtkWidget *widget, GtkSelectionData *selection_data,
           guint info, guint time_stamp, FolderBrowser *fb)
{
    if (fb->clipboard_selection == NULL)
        return;
    
    switch (info) {
    default:
    case PASTE_TARGET_TYPE_TEXT_PLAIN:
    {
        /* FIXME: this'll be fucking slow for the user... pthread this? */
        CamelFolder *source;
        CamelStream *stream;
        GByteArray *bytes;
        GPtrArray *uids;
        int i;
        
        bytes = fb->clipboard_selection;
        
        /* Note: source should == fb->folder, but we might as well use `source' instead of fb->folder */
        source = x_evolution_message_parse (bytes->data, bytes->len, &uids);
        if (source == NULL)
            return;
        
        if (uids == NULL) {
            camel_object_unref (CAMEL_OBJECT (source));
            return;
        }
        
        bytes = g_byte_array_new ();
        stream = camel_stream_mem_new ();
        camel_stream_mem_set_byte_array (CAMEL_STREAM_MEM (stream), bytes);
        
        for (i = 0; i < uids->len; i++) {
            CamelMimeMessage *message;
            
            message = camel_folder_get_message (source, uids->pdata[i], NULL);
            g_free (uids->pdata[i]);
            
            if (message) {          
                camel_stream_write (stream, "From - \n", 8);
                camel_data_wrapper_write_to_stream (CAMEL_DATA_WRAPPER (message), stream);
                camel_object_unref (CAMEL_OBJECT (message));
            }
        }
        
        g_ptr_array_free (uids, TRUE);
        camel_object_unref (CAMEL_OBJECT (stream));
        camel_object_unref (CAMEL_OBJECT (source));
        
        gtk_selection_data_set (selection_data, selection_data->target, 8,
                    bytes->data, bytes->len);
        
        g_byte_array_free (bytes, FALSE);
    }
    break;
    case PASTE_TARGET_TYPE_X_EVOLUTION_MESSAGE:
        /* we already have our data in the correct form */
        gtk_selection_data_set (selection_data,
                    selection_data->target, 8,
                    fb->clipboard_selection->data,
                    fb->clipboard_selection->len);
        break;
    }
}

static void
selection_clear_event (GtkWidget *widget, GdkEventSelection *event, FolderBrowser *fb)
{
    if (fb->clipboard_selection != NULL) {
        g_byte_array_free (fb->clipboard_selection, TRUE);
        fb->clipboard_selection = NULL;
    }
}

static void
selection_received (GtkWidget *widget, GtkSelectionData *selection_data,
            guint time, FolderBrowser *fb)
{
    CamelFolder *source = NULL;
    GPtrArray *uids = NULL;
    
    if (selection_data == NULL)
        return;
    
    source = x_evolution_message_parse (selection_data->data, selection_data->length, &uids);
    if (source == NULL)
        return;
    
    if (uids == NULL) {
        camel_object_unref (CAMEL_OBJECT (source));
        return;
    }
    
    mail_transfer_messages (source, uids, FALSE, fb->uri, NULL, NULL);
    
    camel_object_unref (CAMEL_OBJECT (source));
}

void
folder_browser_copy (GtkWidget *menuitem, FolderBrowser *fb)
{
    GPtrArray *uids = NULL;
    GByteArray *bytes;
    gboolean cut;
    int i;
    
    cut = menuitem == NULL;
    
    if (fb->clipboard_selection) {
        g_byte_array_free (fb->clipboard_selection, TRUE);
        fb->clipboard_selection = NULL;
    }
    
    uids = g_ptr_array_new ();
    message_list_foreach (fb->message_list, add_uid, uids);
    
    /* format: "uri uid1\0uid2\0uid3\0...\0uidn" */
    
    /* write the uri portion */
    bytes = g_byte_array_new ();
    g_byte_array_append (bytes, fb->uri, strlen (fb->uri));
    g_byte_array_append (bytes, " ", 1);
    
    /* write the uids */
    camel_folder_freeze (fb->folder);
    for (i = 0; i < uids->len; i++) {
        if (cut) {
            camel_folder_set_message_flags (fb->folder, uids->pdata[i],
                            CAMEL_MESSAGE_SEEN | CAMEL_MESSAGE_DELETED,
                            CAMEL_MESSAGE_SEEN | CAMEL_MESSAGE_DELETED);
        }
        g_byte_array_append (bytes, uids->pdata[i], strlen (uids->pdata[i]));
        g_free (uids->pdata[i]);
        
        if (i + 1 < uids->len)
            g_byte_array_append (bytes, "", 1);
    }
    camel_folder_thaw (fb->folder);
    
    g_ptr_array_free (uids, TRUE);
    
    fb->clipboard_selection = bytes;
    
    gtk_selection_owner_set (fb->invisible, clipboard_atom, GDK_CURRENT_TIME);
}

void
folder_browser_cut (GtkWidget *menuitem, FolderBrowser *fb)
{
    folder_browser_copy (NULL, fb);
}

void
folder_browser_paste (GtkWidget *menuitem, FolderBrowser *fb)
{
    gtk_selection_convert (fb->invisible, clipboard_atom,
                   paste_types[0].target,
                   GDK_CURRENT_TIME);
}

static void
got_folder(char *uri, CamelFolder *folder, void *data)
{
    FolderBrowser *fb = data;
    
    d(printf ("got folder '%s' = %p\n", uri, folder));
    
    if (fb->folder == folder)
        goto done;
    
    if (fb->folder)
        camel_object_unref (CAMEL_OBJECT (fb->folder));
    g_free (fb->uri);
    fb->uri = g_strdup (uri);
    fb->folder = folder;
    
    if (folder == NULL)
        goto done;
    
    camel_object_ref (CAMEL_OBJECT (folder));
    
    gtk_widget_set_sensitive (GTK_WIDGET (fb->search), camel_folder_has_search_capability (folder));
    message_list_set_threaded (fb->message_list, mail_config_get_thread_list (fb->uri));
    message_list_set_folder (fb->message_list, folder,
                 folder_browser_is_drafts (fb) ||
                 folder_browser_is_sent (fb) ||
                 folder_browser_is_outbox (fb));
    vfolder_register_source (folder);

    mail_folder_cache_note_folder (fb->uri, folder);
    mail_folder_cache_note_fb (fb->uri, fb);

 done:
    gtk_object_unref (GTK_OBJECT (fb));
    
    /* Sigh, i dont like this (it can be set in reconfigure folder),
       but its just easier right now to do it this way */
    fb->reconfigure = FALSE;
    
    gtk_signal_emit (GTK_OBJECT (fb), folder_browser_signals [FOLDER_LOADED], fb->uri);
}

gboolean
folder_browser_set_uri (FolderBrowser *folder_browser, const char *uri)
{
    if (uri && *uri) {
        gtk_object_ref((GtkObject *)folder_browser);
        mail_get_folder(uri, got_folder, folder_browser);
    } else {
        /* Sigh, i dont like this (it can be set in reconfigure folder),
           but its just easier right now to do it this way */
        folder_browser->reconfigure = FALSE;
    }
    
    return TRUE;
}

void
folder_browser_set_ui_component (FolderBrowser *fb, BonoboUIComponent *uicomp)
{
    g_return_if_fail (IS_FOLDER_BROWSER (fb));
    
    if (fb->uicomp)
        bonobo_object_unref (BONOBO_OBJECT (fb->uicomp));

    if (uicomp)
        bonobo_object_ref (BONOBO_OBJECT (uicomp));

    fb->uicomp = uicomp;
}

extern CamelFolder *drafts_folder, *sent_folder, *outbox_folder;

/**
 * folder_browser_is_drafts:
 * @fb: a FolderBrowser
 *
 * Return value: %TRUE if @fb refers to /local/Drafts or any other
 * configured Drafts folder.
 **/
gboolean
folder_browser_is_drafts (FolderBrowser *fb)
{
    const GSList *accounts;
    MailConfigAccount *account;
    
    g_return_val_if_fail (IS_FOLDER_BROWSER (fb) && fb->uri, FALSE);
    
    if (fb->folder == drafts_folder)
        return TRUE;
    
    accounts = mail_config_get_accounts ();
    while (accounts) {
        account = accounts->data;
        if (account->drafts_folder_uri &&
            !strcmp (account->drafts_folder_uri, fb->uri))
            return TRUE;
        accounts = accounts->next;
    }
    
    return FALSE;
}

/**
 * folder_browser_is_sent:
 * @fb: a FolderBrowser
 *
 * Return value: %TRUE if @fb refers to /local/Sent or any other
 * configured Sent folder.
 **/
gboolean
folder_browser_is_sent (FolderBrowser *fb)
{
    const GSList *accounts;
    MailConfigAccount *account;
    
    g_return_val_if_fail (IS_FOLDER_BROWSER (fb) && fb->uri, FALSE);
    
    if (fb->folder == sent_folder)
        return TRUE;
    
    accounts = mail_config_get_accounts ();
    while (accounts) {
        account = accounts->data;
        if (account->sent_folder_uri &&
            !strcmp (account->sent_folder_uri, fb->uri))
            return TRUE;
        accounts = accounts->next;
    }
    
    return FALSE;
}

/**
 * folder_browser_is_outbox:
 * @fb: a FolderBrowser
 *
 * Return value: %TRUE if @fb refers to /local/Outbox or any other
 * configured Outbox folder.
 **/
gboolean
folder_browser_is_outbox (FolderBrowser *fb)
{
    /* There can be only one. */
    return fb->folder == outbox_folder;
}

static int
save_cursor_pos (FolderBrowser *fb)
{
    ETreePath node;
    GtkAdjustment *adj;
    int row, y, height;

    node = e_tree_get_cursor (fb->message_list->tree);
    if (!node)
        return -1;

    row = e_tree_row_of_node (fb->message_list->tree, node);

    if (row == -1)
        return 0;

    e_tree_get_cell_geometry (fb->message_list->tree, row, 0,
                  NULL, &y, NULL, &height);

    adj = e_scroll_frame_get_vadjustment (E_SCROLL_FRAME (fb->message_list));
    y += adj->value - ((mail_config_get_paned_size () - height) / 2);
    
    return y;
}

static void
set_cursor_pos (FolderBrowser *fb, int y)
{
    GtkAdjustment *adj;

    if (y == -1)
        return;

    adj = e_scroll_frame_get_vadjustment (E_SCROLL_FRAME (fb->message_list));
    gtk_adjustment_set_value (adj, (gfloat)y);
}

static gboolean do_message_selected(FolderBrowser *fb);

void
folder_browser_set_message_preview (FolderBrowser *folder_browser, gboolean show_message_preview)
{
    if (folder_browser->preview_shown == show_message_preview)
        return;

    folder_browser->preview_shown = show_message_preview;

    if (show_message_preview) {
        int y;
        y = save_cursor_pos (folder_browser);
        e_paned_set_position (E_PANED (folder_browser->vpaned),
                      mail_config_get_paned_size ());
        gtk_widget_show (GTK_WIDGET (folder_browser->mail_display));
        do_message_selected (folder_browser);
        set_cursor_pos (folder_browser, y);
    } else {
        e_paned_set_position (E_PANED (folder_browser->vpaned),
                      10000);
        gtk_widget_hide (GTK_WIDGET (folder_browser->mail_display));
        mail_display_set_message(folder_browser->mail_display, NULL);
    }
}

enum {
    ESB_SAVE,
};

static ESearchBarItem folder_browser_search_menu_items[] = {
    E_FILTERBAR_RESET,
    E_FILTERBAR_SAVE,
    { N_("Store search as vFolder"),  ESB_SAVE     },
    E_FILTERBAR_EDIT,
    { NULL,                           -1           }
};

static void
folder_browser_search_menu_activated (ESearchBar *esb, int id, FolderBrowser *fb)
{
    EFilterBar *efb = (EFilterBar *)esb;
    
    d(printf("menu activated\n"));
    
    switch (id) {
    case ESB_SAVE:
        d(printf("Save vfolder\n"));
        if (efb->current_query) {
            FilterRule *rule = vfolder_clone_rule(efb->current_query);          
            
            filter_rule_set_source(rule, FILTER_SOURCE_INCOMING);
            vfolder_rule_add_source((VfolderRule *)rule, fb->uri);
            vfolder_gui_add_rule((VfolderRule *)rule);
        }
        break;
    }
}

static void
folder_browser_config_search (EFilterBar *efb, FilterRule *rule, int id, const char *query, void *data)
{
    FolderBrowser *fb = FOLDER_BROWSER (data);
    ESearchingTokenizer *st;
    GList *partl;

    st = E_SEARCHING_TOKENIZER (fb->mail_display->html->engine->ht); 

    e_searching_tokenizer_set_secondary_search_string (st, NULL);
    
    /* we scan the parts of a rule, and set all the types we know about to the query string */
    partl = rule->parts;
    while (partl) {
        FilterPart *part = partl->data;

        if (!strcmp(part->name, "subject")) {
            FilterInput *input = (FilterInput *)filter_part_find_element(part, "subject");
            if (input)
                filter_input_set_value(input, query);
        } else if (!strcmp(part->name, "body")) {
            FilterInput *input = (FilterInput *)filter_part_find_element(part, "word");
            if (input)
                filter_input_set_value(input, query);
            e_searching_tokenizer_set_secondary_search_string (st, query);
        } else if(!strcmp(part->name, "sender")) {
            FilterInput *input = (FilterInput *)filter_part_find_element(part, "sender");
            if (input)
                filter_input_set_value(input, query);
        }
        
        partl = partl->next;
    }
    
    d(printf("configuring search for search string '%s', rule is '%s'\n", query, rule->name));
    
    mail_display_redisplay (fb->mail_display, FALSE);
}

static void
folder_browser_search_query_changed (ESearchBar *esb, FolderBrowser *fb)
{
    char *search_word;
    
    d(printf("query changed\n"));
    
    gtk_object_get (GTK_OBJECT (esb),
            "query", &search_word,
            NULL);

    message_list_set_search (fb->message_list, search_word);
    
    d(printf("query is %s\n", search_word));
    g_free(search_word);
    return;
}

void
folder_browser_toggle_preview (BonoboUIComponent           *component,
                   const char                  *path,
                   Bonobo_UIComponent_EventType type,
                   const char                  *state,
                   gpointer                     user_data)
{
    FolderBrowser *fb = user_data;
    
    if (type != Bonobo_UIComponent_STATE_CHANGED)
        return;
    
    mail_config_set_show_preview (fb->uri, atoi (state));
    folder_browser_set_message_preview (fb, atoi (state));
}

void
folder_browser_toggle_threads (BonoboUIComponent           *component,
                   const char                  *path,
                   Bonobo_UIComponent_EventType type,
                   const char                  *state,
                   gpointer                     user_data)
{
    FolderBrowser *fb = user_data;
    
    if (type != Bonobo_UIComponent_STATE_CHANGED)
        return;
    
    mail_config_set_thread_list (fb->uri, atoi (state));
    message_list_set_threaded (fb->message_list, atoi (state));
}

void
folder_browser_toggle_hide_deleted (BonoboUIComponent           *component,
                    const char                  *path,
                    Bonobo_UIComponent_EventType type,
                    const char                  *state,
                    gpointer                     user_data)
{
    FolderBrowser *fb = user_data;

    if (type != Bonobo_UIComponent_STATE_CHANGED)
        return;

    if (!(fb->folder && CAMEL_IS_VTRASH_FOLDER(fb->folder)))
        mail_config_set_hide_deleted (atoi (state));
    message_list_set_hidedeleted (fb->message_list, atoi (state));
}

void
folder_browser_set_message_display_style (BonoboUIComponent           *component,
                      const char                  *path,
                      Bonobo_UIComponent_EventType type,
                      const char                  *state,
                      gpointer                     user_data)
{
    extern char *message_display_styles[];
    FolderBrowser *fb = user_data;
    int i;

    if (type != Bonobo_UIComponent_STATE_CHANGED || atoi(state) == 0)
        return;

    for (i = 0; i < MAIL_CONFIG_DISPLAY_MAX; i++) {
        if (strstr (message_display_styles[i], path)) {
            fb->mail_display->display_style = i;
            mail_display_redisplay (fb->mail_display, TRUE);

            if (fb->pref_master)
                mail_config_set_message_display_style (i);
            return;
        }
    }
}

void
vfolder_subject (GtkWidget *w, FolderBrowser *fb)
{
    vfolder_gui_add_from_message (fb->mail_display->current_message, AUTO_SUBJECT, fb->uri);
}

void
vfolder_sender (GtkWidget *w, FolderBrowser *fb)
{
    vfolder_gui_add_from_message (fb->mail_display->current_message, AUTO_FROM, fb->uri);
}

void
vfolder_recipient (GtkWidget *w, FolderBrowser *fb)
{
    vfolder_gui_add_from_message (fb->mail_display->current_message, AUTO_TO, fb->uri);
}

void
vfolder_mlist (GtkWidget *w, FolderBrowser *fb)
{
    char *name;

    g_return_if_fail (fb->mail_display->current_message != NULL);

    name = header_raw_check_mailing_list(&((CamelMimePart *)fb->mail_display->current_message)->headers);
    if (name) {
        g_strstrip (name);
        vfolder_gui_add_from_mlist(fb->mail_display->current_message, name, fb->uri);
        g_free(name);
    }
}

void
filter_subject (GtkWidget *w, FolderBrowser *fb)
{
    filter_gui_add_from_message (fb->mail_display->current_message, AUTO_SUBJECT);
}

void
filter_sender (GtkWidget *w, FolderBrowser *fb)
{
    filter_gui_add_from_message (fb->mail_display->current_message, AUTO_FROM);
}

void
filter_recipient (GtkWidget *w, FolderBrowser *fb)
{
    filter_gui_add_from_message (fb->mail_display->current_message, AUTO_TO);
}

void
filter_mlist (GtkWidget *w, FolderBrowser *fb)
{
    char *name;

    g_return_if_fail (fb->mail_display->current_message != NULL);

    name = header_raw_check_mailing_list(&((CamelMimePart *)fb->mail_display->current_message)->headers);
    if (name) {
        filter_gui_add_from_mlist(name);
        g_free(name);
    }
}

void
hide_none(GtkWidget *w, FolderBrowser *fb)
{
    message_list_hide_clear(fb->message_list);
}

void
hide_selected(GtkWidget *w, FolderBrowser *fb)
{
    GPtrArray *uids;
    int i;

    uids = g_ptr_array_new();
    message_list_foreach(fb->message_list, enumerate_msg, uids);
    message_list_hide_uids(fb->message_list, uids);
    for (i=0; i<uids->len; i++)
        g_free(uids->pdata[i]);
    g_ptr_array_free(uids, TRUE);
}

void
hide_deleted(GtkWidget *w, FolderBrowser *fb)
{
    MessageList *ml = fb->message_list;

    message_list_hide_add(ml, "(match-all (system-flag \"deleted\"))", ML_HIDE_SAME, ML_HIDE_SAME);
}

void
hide_read(GtkWidget *w, FolderBrowser *fb)
{
    MessageList *ml = fb->message_list;

    message_list_hide_add(ml, "(match-all (system-flag \"seen\"))", ML_HIDE_SAME, ML_HIDE_SAME);
}

/* dum de dum, about the 3rd copy of this function throughout the mailer/camel */
static const char *
strip_re(const char *subject)
{
    const unsigned char *s, *p;
    
    s = (unsigned char *) subject;
    
    while (*s) {
        while(isspace (*s))
            s++;
        if (s[0] == 0)
            break;
        if ((s[0] == 'r' || s[0] == 'R')
            && (s[1] == 'e' || s[1] == 'E')) {
            p = s+2;
            while (isdigit(*p) || (ispunct(*p) && (*p != ':')))
                p++;
            if (*p == ':') {
                s = p + 1;
            } else
                break;
        } else
            break;
    }
    return (char *) s;
}

void
hide_subject(GtkWidget *w, FolderBrowser *fb)
{
    const char *subject;
    GString *expr;

    if (fb->mail_display->current_message) {
        subject = camel_mime_message_get_subject(fb->mail_display->current_message);
        if (subject) {
            subject = strip_re(subject);
            if (subject && subject[0]) {
                expr = g_string_new("(match-all (header-contains \"subject\" ");
                e_sexp_encode_string(expr, subject);
                g_string_append(expr, "))");
                message_list_hide_add(fb->message_list, expr->str, ML_HIDE_SAME, ML_HIDE_SAME);
                g_string_free(expr, TRUE);
                return;
            }
        }
    }
}

void
hide_sender(GtkWidget *w, FolderBrowser *fb)
{
    const CamelInternetAddress *from;
    const char *real, *addr;
    GString *expr;

    if (fb->mail_display->current_message) {
        from = camel_mime_message_get_from(fb->mail_display->current_message);
        if (camel_internet_address_get(from, 0, &real, &addr)) {
            expr = g_string_new("(match-all (header-contains \"from\" ");
            e_sexp_encode_string(expr, addr);
            g_string_append(expr, "))");
            message_list_hide_add(fb->message_list, expr->str, ML_HIDE_SAME, ML_HIDE_SAME);
            g_string_free(expr, TRUE);
            return;
        }
    }
}

enum {
    SELECTION_SET   = 2,
    CAN_MARK_READ   = 4,
    CAN_MARK_UNREAD = 8,
    CAN_DELETE      = 16,
    CAN_UNDELETE    = 32,
    IS_MAILING_LIST = 64,
    CAN_RESEND      = 128,
};

#define MLIST_VFOLDER (3)
#define MLIST_FILTER (8)

static EPopupMenu filter_menu[] = {
    { N_("VFolder on _Subject"),           NULL,
      GTK_SIGNAL_FUNC (vfolder_subject),   NULL,
      SELECTION_SET },
    { N_("VFolder on Se_nder"),            NULL,
      GTK_SIGNAL_FUNC (vfolder_sender),    NULL,
      SELECTION_SET },
    { N_("VFolder on _Recipients"),        NULL,
      GTK_SIGNAL_FUNC (vfolder_recipient), NULL,
      SELECTION_SET },
    { N_("VFolder on Mailing _List"),      NULL,
      GTK_SIGNAL_FUNC (vfolder_mlist),     NULL,
      SELECTION_SET | IS_MAILING_LIST },
    
    E_POPUP_SEPARATOR,
    
    { N_("Filter on Sub_ject"),            NULL,
      GTK_SIGNAL_FUNC (filter_subject),    NULL,
      SELECTION_SET },
    { N_("Filter on Sen_der"),             NULL,
      GTK_SIGNAL_FUNC (filter_sender),     NULL,
      SELECTION_SET },
    { N_("Filter on Re_cipients"),         NULL,
      GTK_SIGNAL_FUNC (filter_recipient),  NULL,
      SELECTION_SET },
    { N_("Filter on _Mailing List"),       NULL,
      GTK_SIGNAL_FUNC (filter_mlist),      NULL,
      SELECTION_SET | IS_MAILING_LIST },
    
    E_POPUP_TERMINATOR
};


static EPopupMenu context_menu[] = {
    { N_("_Open"),                        NULL,
      GTK_SIGNAL_FUNC (open_msg),         NULL,  0 },
    { N_("Resend"),                       NULL,
      GTK_SIGNAL_FUNC (resend_msg),       NULL,  CAN_RESEND },
    { N_("_Save As..."),                  NULL,
      GTK_SIGNAL_FUNC (save_msg),         NULL,  0 },
    { N_("_Print"),                       NULL,
      GTK_SIGNAL_FUNC (print_msg),        NULL,  0 },
    
    E_POPUP_SEPARATOR,
    
    { N_("_Reply to Sender"),             NULL,
      GTK_SIGNAL_FUNC (reply_to_sender),  NULL,  0 },
    { N_("Reply to _List"),               NULL,
      GTK_SIGNAL_FUNC (reply_to_list),    NULL,  0 },
    { N_("Reply to _All"),                NULL,
      GTK_SIGNAL_FUNC (reply_to_all),     NULL,  0 },
    { N_("_Forward"),                     NULL,
      GTK_SIGNAL_FUNC (forward),          NULL,  0 },
    { "", NULL, (NULL), NULL,  0 },
    { N_("Mar_k as Read"),                NULL,
      GTK_SIGNAL_FUNC (mark_as_seen),     NULL,  CAN_MARK_READ },
    { N_("Mark as U_nread"),              NULL,
      GTK_SIGNAL_FUNC (mark_as_unseen),   NULL,  CAN_MARK_UNREAD },
    { N_("Mark as _Important"),            NULL,
      GTK_SIGNAL_FUNC (mark_as_important), NULL, 0 },
    
    E_POPUP_SEPARATOR,
    
    { N_("_Move to Folder..."),           NULL,
      GTK_SIGNAL_FUNC (move_msg),         NULL,  0 },
    { N_("_Copy to Folder..."),           NULL,
      GTK_SIGNAL_FUNC (copy_msg),         NULL,  0 },
    { N_("_Delete"),                      NULL,
      GTK_SIGNAL_FUNC (delete_msg),       NULL, CAN_DELETE },
    { N_("_Undelete"),                    NULL,
      GTK_SIGNAL_FUNC (undelete_msg),     NULL, CAN_UNDELETE },
    
    E_POPUP_SEPARATOR,
    
    { N_("Add Sender to Address Book"),   NULL,
      GTK_SIGNAL_FUNC (addrbook_sender),  NULL,  0 },
      { "",                               NULL,
      GTK_SIGNAL_FUNC (NULL),             NULL,  0 },
    
    { N_("Apply Filters"),                NULL,
      GTK_SIGNAL_FUNC (apply_filters),    NULL,  0 },
    { "",                                 NULL,
      GTK_SIGNAL_FUNC (NULL),             NULL,  0 },
    { N_("Create Ru_le From Message"),    NULL,
      GTK_SIGNAL_FUNC (NULL), filter_menu,  SELECTION_SET },
    
    E_POPUP_TERMINATOR
};


struct cmpf_data {
    ETree *tree;
    int row, col;
};

static void
context_menu_position_func (GtkMenu *menu, gint *x, gint *y,
                gpointer user_data)
{
    int tx, ty, tw, th;
    struct cmpf_data *closure = user_data;

    gdk_window_get_origin (GTK_WIDGET (closure->tree)->window, x, y);
    e_tree_get_cell_geometry (closure->tree, closure->row, closure->col,
                  &tx, &ty, &tw, &th);
    *x += tx + tw / 2;
    *y += ty + th / 2;
}

/* handle context menu over message-list */
static gint
on_right_click (ETree *tree, gint row, ETreePath path, gint col, GdkEvent *event, FolderBrowser *fb)
{
    extern CamelFolder *sent_folder;
    CamelMessageInfo *info;
    GPtrArray *uids;
    int enable_mask = 0;
    int hide_mask = 0;
    int i;
    char *mailing_list_name = NULL;
    char *subject_match = NULL, *from_match = NULL;
    GtkMenu *menu;
    
    if (fb->reconfigure) {
        enable_mask = 0;
        goto display_menu;
    }
    
    if (fb->folder != sent_folder) {
        enable_mask |= CAN_RESEND;
        hide_mask |= CAN_RESEND;
    }
    
    if (fb->mail_display->current_message == NULL) {
        enable_mask |= SELECTION_SET;
        mailing_list_name = NULL;
    } else {
        const char *subject, *real, *addr;
        const CamelInternetAddress *from;

        mailing_list_name = header_raw_check_mailing_list(
            &((CamelMimePart *)fb->mail_display->current_message)->headers);

        if ((subject = camel_mime_message_get_subject(fb->mail_display->current_message))
            && (subject = strip_re(subject))
            && subject[0])
            subject_match = g_strdup(subject);

        if ((from = camel_mime_message_get_from(fb->mail_display->current_message))
            && camel_internet_address_get(from, 0, &real, &addr)
            && addr && addr[0])
            from_match = g_strdup(addr);
    }
    
    /* get a list of uids */
    uids = g_ptr_array_new ();
    message_list_foreach (fb->message_list, enumerate_msg, uids);
    if (uids->len >= 1) {
        /* gray-out any items we don't need */
        gboolean have_deleted = FALSE;
        gboolean have_undeleted = FALSE;
        gboolean have_seen = FALSE;
        gboolean have_unseen = FALSE;

        for (i = 0; i < uids->len; i++) {
            info = camel_folder_get_message_info (fb->folder, uids->pdata[i]);
            if (info == NULL)
                continue;

            if (info->flags & CAMEL_MESSAGE_SEEN)
                have_seen = TRUE;
            else
                have_unseen = TRUE;
            
            if (info->flags & CAMEL_MESSAGE_DELETED)
                have_deleted = TRUE;
            else
                have_undeleted = TRUE;
            
            camel_folder_free_message_info(fb->folder, info);

            if (have_seen && have_unseen && have_deleted && have_undeleted)
                break;
        }

        if (!have_unseen)
            enable_mask |= CAN_MARK_READ;
        if (!have_seen)
            enable_mask |= CAN_MARK_UNREAD;
        
        if (!have_undeleted)
            enable_mask |= CAN_DELETE;
        if (!have_deleted)
            enable_mask |= CAN_UNDELETE;

        /*
         * Hide items that wont get used.
         */
        if (!(have_unseen && have_seen)){
            if (have_seen)
                hide_mask |= CAN_MARK_READ;
            else
                hide_mask |= CAN_MARK_UNREAD;
        }
        if (!(have_undeleted && have_deleted)){
            if (have_deleted)
                hide_mask |= CAN_DELETE;
            else
                hide_mask |= CAN_UNDELETE;
        }
    }

    /* free uids */
    for (i = 0; i < uids->len; i++)
        g_free (uids->pdata[i]);
    g_ptr_array_free (uids, TRUE);

display_menu:
    
    /* generate the "Filter on Mailing List menu item name */
    if (mailing_list_name == NULL) {
        enable_mask |= IS_MAILING_LIST;
        filter_menu[MLIST_FILTER].name = g_strdup (_("Filter on Mailing List"));
        filter_menu[MLIST_VFOLDER].name = g_strdup (_("VFolder on Mailing List"));
    } else {
        filter_menu[MLIST_FILTER].name = g_strdup_printf (_("Filter on Mailing List (%s)"), mailing_list_name);
        filter_menu[MLIST_VFOLDER].name = g_strdup_printf (_("VFolder on Mailing List (%s)"), mailing_list_name);
        g_free(mailing_list_name);
    }

    menu = e_popup_menu_create (context_menu, enable_mask, hide_mask, fb);
    e_auto_kill_popup_menu_on_hide (menu);

    if (event->type == GDK_KEY_PRESS) {
        struct cmpf_data closure;

        closure.tree = tree;
        closure.row = row;
        closure.col = col;
        gtk_menu_popup (menu, NULL, NULL, context_menu_position_func,
                &closure, 0, event->key.time);
    } else {
        gtk_menu_popup (menu, NULL, NULL, NULL, NULL,
                event->button.button, event->button.time);
    }

    g_free(filter_menu[MLIST_FILTER].name);
    g_free(filter_menu[MLIST_VFOLDER].name);

    return TRUE;
}

static gint
on_key_press (GtkWidget *widget, GdkEventKey *key, gpointer data)
{
    FolderBrowser *fb = data;
    ETreePath *path;
    int row;

    if (key->state & GDK_CONTROL_MASK)
        return FALSE;

    path = e_tree_get_cursor (fb->message_list->tree);
    row = e_tree_row_of_node (fb->message_list->tree, path);

    switch (key->keyval) {
    case GDK_Delete:
    case GDK_KP_Delete:
        delete_msg (NULL, fb);
        return TRUE;

    case 'n':
    case 'N':
        message_list_select (fb->message_list, row,
                     MESSAGE_LIST_SELECT_NEXT,
                     0, CAMEL_MESSAGE_SEEN);
        return TRUE;

    case 'p':
    case 'P':
        message_list_select (fb->message_list, row,
                     MESSAGE_LIST_SELECT_PREVIOUS,
                     0, CAMEL_MESSAGE_SEEN);
        return TRUE;

    case GDK_Menu:
        on_right_click (fb->message_list->tree, row, path, 2,
                (GdkEvent *)key, fb);
        return TRUE;
    case '!':
        toggle_as_important (NULL, fb, NULL);
        return TRUE;
    case 'q':
    case 'Q':
        if (fb->preview_shown && fb->uicomp)
            bonobo_ui_component_set_prop (fb->uicomp, 
                              "/commands/ViewPreview",
                              "state", "0", NULL);
        return TRUE;
    }

    return FALSE;
}

static int
etree_key (ETree *tree, int row, ETreePath path, int col, GdkEvent *ev, FolderBrowser *fb)
{
    GtkAdjustment *vadj;
    gfloat page_size;

    if ((ev->key.state & GDK_CONTROL_MASK) != 0)
        return FALSE;

    vadj = e_scroll_frame_get_vadjustment (fb->mail_display->scroll);
    page_size = vadj->page_size - vadj->step_increment;

    switch (ev->key.keyval) {
    case GDK_space:
        if (vadj->value < vadj->upper - vadj->page_size - page_size)
            vadj->value += page_size;
        else
            vadj->value = vadj->upper - vadj->page_size;
        gtk_adjustment_value_changed (vadj);
        break;
    case GDK_BackSpace:
        if (vadj->value > vadj->lower + page_size)
            vadj->value -= page_size;
        else
            vadj->value = vadj->lower;
        gtk_adjustment_value_changed (vadj);
        break;
    case GDK_Return:
    case GDK_KP_Enter:
    case GDK_ISO_Enter:
        if (fb->preview_shown)
            open_msg (NULL, fb);
        else if (fb->uicomp)
            bonobo_ui_component_set_prop (fb->uicomp, 
                              "/commands/ViewPreview",
                              "state", "1", NULL);
        break;
    default:
        return on_key_press ((GtkWidget *)tree, (GdkEventKey *)ev, fb);
    }

    return TRUE;
}

static void
on_double_click (ETree *tree, gint row, ETreePath path, gint col, GdkEvent *event, FolderBrowser *fb)
{
    /* Ignore double-clicks on columns where single-click doesn't
     * just select.
     */
    if (MESSAGE_LIST_COLUMN_IS_ACTIVE (col))
        return;
    
    open_msg (NULL, fb);
}

static void
fb_resize_cb (GtkWidget *w, GtkAllocation *a, FolderBrowser *fb)
{   
    if (fb->preview_shown)
        mail_config_set_paned_size (a->height);
}

static void
folder_browser_gui_init (FolderBrowser *fb)
{
    /* The panned container */
    fb->vpaned = e_vpaned_new ();
    gtk_widget_show (fb->vpaned);
    
    gtk_table_attach (GTK_TABLE (fb), fb->vpaned,
              0, 1, 1, 3,
              GTK_FILL | GTK_EXPAND,
              GTK_FILL | GTK_EXPAND,
              0, 0);
    
    /* quick-search bar */
    {
        RuleContext *rc = (RuleContext *)rule_context_new ();
        char *user = g_strdup_printf ("%s/searches.xml", evolution_dir);
        /* we reuse the vfolder types here, they should match */
        char *system = EVOLUTION_DATADIR "/evolution/vfoldertypes.xml";
        
        rule_context_add_part_set ((RuleContext *)rc, "partset", filter_part_get_type (),
                       rule_context_add_part, rule_context_next_part);
        
        rule_context_add_rule_set ((RuleContext *)rc, "ruleset", filter_rule_get_type (),
                       rule_context_add_rule, rule_context_next_rule);
        
        fb->search = e_filter_bar_new (rc, system, user, folder_browser_config_search, fb);
        e_search_bar_set_menu ((ESearchBar *)fb->search, folder_browser_search_menu_items);
        /*e_search_bar_set_option((ESearchBar *)fb->search, folder_browser_search_option_items);*/
        g_free (user);
        gtk_object_unref (GTK_OBJECT (rc));
    }
    
    gtk_widget_show (GTK_WIDGET (fb->search));
    
    gtk_signal_connect (GTK_OBJECT (fb->search), "query_changed",
                GTK_SIGNAL_FUNC (folder_browser_search_query_changed), fb);
    gtk_signal_connect (GTK_OBJECT (fb->search), "menu_activated",
                GTK_SIGNAL_FUNC (folder_browser_search_menu_activated), fb);
    
    gtk_table_attach (GTK_TABLE (fb), GTK_WIDGET (fb->search),
              0, 1, 0, 1,
              GTK_FILL | GTK_EXPAND,
              0,
              0, 0);
    
    e_paned_add1 (E_PANED (fb->vpaned), GTK_WIDGET (fb->message_list));
    gtk_widget_show (GTK_WIDGET (fb->message_list));
    
    gtk_signal_connect (GTK_OBJECT (fb->message_list), "size_allocate",
                        GTK_SIGNAL_FUNC (fb_resize_cb), fb);
    
    e_paned_add2 (E_PANED (fb->vpaned), GTK_WIDGET (fb->mail_display));
    e_paned_set_position (E_PANED (fb->vpaned), mail_config_get_paned_size ());
    gtk_widget_show (GTK_WIDGET (fb->mail_display));
    gtk_widget_show (GTK_WIDGET (fb));
}

/* mark the message seen if the current message still matches */
static gint 
do_mark_seen (gpointer data)
{
    FolderBrowser *fb = data;

    if (fb->new_uid && fb->loaded_uid
        && strcmp (fb->new_uid, fb->loaded_uid) == 0) {
        camel_folder_set_message_flags (fb->folder, fb->new_uid, CAMEL_MESSAGE_SEEN, CAMEL_MESSAGE_SEEN);
    }

    return FALSE;
}

/* callback when we have the message to display, after async loading it (see below) */
/* if we have pending uid's, it means another was selected before we finished displaying
   the last one - so we cycle through and start loading the pending one immediately now */
static void
done_message_selected (CamelFolder *folder, char *uid, CamelMimeMessage *msg, void *data)
{
    FolderBrowser *fb = data;
    int timeout = mail_config_get_mark_as_seen_timeout ();

    if (folder != fb->folder)
        return;
    
    mail_display_set_message (fb->mail_display, (CamelMedium *)msg);
    /* FIXME: should this signal be emitted here?? */
    gtk_signal_emit (GTK_OBJECT (fb), folder_browser_signals [MESSAGE_LOADED], uid);
    
    /* pain, if we have pending stuff, re-run */
    if (fb->pending_uid) {  
        g_free(fb->loading_uid);
        fb->loading_uid = fb->pending_uid;
        fb->pending_uid = NULL;

        mail_get_message(fb->folder, fb->loading_uid, done_message_selected, fb, mail_thread_new);
        return;
    }

    g_free(fb->loaded_uid);
    fb->loaded_uid = fb->loading_uid;
    fb->loading_uid = NULL;

    /* if we are still on the same message, do the 'idle read' thing */
    if (fb->seen_id)
        gtk_timeout_remove(fb->seen_id);

    if (mail_config_get_do_seen_timeout() && msg) {
        if (timeout > 0)
            fb->seen_id = gtk_timeout_add(timeout, do_mark_seen, fb);
        else
            do_mark_seen(fb);
    }
}

/* ok we waited enough, display it anyway (see below) */
static gboolean
do_message_selected (FolderBrowser *fb)
{
    d(printf ("selecting uid %s (delayed)\n", fb->new_uid ? fb->new_uid : "NONE"));
    
    /* keep polling if we are busy */
    if (fb->reconfigure) {
        if (fb->new_uid == NULL) {
            mail_display_set_message(fb->mail_display, NULL);
            return FALSE;
        }
        return TRUE;
    }
    
    fb->loading_id = 0;
    
    /* if we are loading, then set a pending, but leave the loading, coudl cancel here (?) */
    if (fb->loading_uid) {
        g_free(fb->pending_uid);
        fb->pending_uid = g_strdup(fb->new_uid);
    } else {
        if (fb->new_uid) {
            fb->loading_uid = g_strdup(fb->new_uid);
            mail_get_message(fb->folder, fb->loading_uid, done_message_selected, fb, mail_thread_new);
        } else {
            mail_display_set_message(fb->mail_display, NULL);
        }
    }
    
    return FALSE;
}

/* when a message is selected, wait a while before trying to display it */
static void
on_message_selected (MessageList *ml, const char *uid, FolderBrowser *fb)
{
    d(printf ("selecting uid %s (direct)\n", uid ? uid : "NONE"));

    if (fb->loading_id != 0)
        gtk_timeout_remove(fb->loading_id);

    g_free(fb->new_uid);
    fb->new_uid = g_strdup(uid);

    if (fb->preview_shown)
        fb->loading_id = gtk_timeout_add(100, (GtkFunction)do_message_selected, fb);
}

static void
folder_browser_init (GtkObject *object)
{
}

static void
my_folder_browser_init (GtkObject *object)
{
    FolderBrowser *fb = FOLDER_BROWSER (object);
    int i;
    
    fb->view_collection = NULL;
    fb->view_menus = NULL;

    fb->pref_master = FALSE;

    /*
     * Setup parent class fields.
     */ 
    GTK_TABLE (fb)->homogeneous = FALSE;
    gtk_table_resize (GTK_TABLE (fb), 1, 2);
    
    /*
     * Our instance data
     */
    fb->message_list = (MessageList *)message_list_new ();
    fb->mail_display = (MailDisplay *)mail_display_new ();
    
    fb->preview_shown = TRUE;
    
    e_scroll_frame_set_policy(E_SCROLL_FRAME(fb->message_list),
                  GTK_POLICY_NEVER,
                  GTK_POLICY_ALWAYS);
    
    gtk_signal_connect (GTK_OBJECT (fb->mail_display->html),
                "key_press_event", GTK_SIGNAL_FUNC (on_key_press), fb);
    
    gtk_signal_connect (GTK_OBJECT (fb->message_list->tree),
                "key_press", GTK_SIGNAL_FUNC (etree_key), fb);
    
    gtk_signal_connect (GTK_OBJECT (fb->message_list->tree),
                "right_click", GTK_SIGNAL_FUNC (on_right_click), fb);
    
    gtk_signal_connect (GTK_OBJECT (fb->message_list->tree),
                "double_click", GTK_SIGNAL_FUNC (on_double_click), fb);
    
    gtk_signal_connect (GTK_OBJECT (fb->message_list), "message_selected",
                on_message_selected, fb);
    
    /* drag & drop */
    e_tree_drag_source_set (fb->message_list->tree, GDK_BUTTON1_MASK,
                drag_types, num_drag_types, GDK_ACTION_MOVE | GDK_ACTION_COPY);
    
    gtk_signal_connect (GTK_OBJECT (fb->message_list->tree), "tree_drag_data_get",
                GTK_SIGNAL_FUNC (message_list_drag_data_get), fb);
    
    e_tree_drag_dest_set (fb->message_list->tree, GTK_DEST_DEFAULT_ALL,
                  drag_types, num_drag_types, GDK_ACTION_MOVE | GDK_ACTION_COPY);
    
    gtk_signal_connect (GTK_OBJECT (fb->message_list->tree), "tree_drag_data_received",
                GTK_SIGNAL_FUNC (message_list_drag_data_recieved), fb);
    
    /* cut, copy & paste */
    fb->invisible = gtk_invisible_new ();
    
    for (i = 0; i < num_paste_types; i++)
        gtk_selection_add_target (fb->invisible, clipboard_atom,
                      paste_types[i].target,
                      paste_types[i].info);
    
    gtk_signal_connect (GTK_OBJECT (fb->invisible),
                "selection_get",
                GTK_SIGNAL_FUNC (selection_get),
                (gpointer) fb);
    gtk_signal_connect (GTK_OBJECT (fb->invisible),
                "selection_clear_event",
                GTK_SIGNAL_FUNC (selection_clear_event),
                (gpointer) fb);
    gtk_signal_connect (GTK_OBJECT (fb->invisible),
                "selection_received",
                GTK_SIGNAL_FUNC (selection_received),
                (gpointer) fb);
    
    folder_browser_gui_init (fb);
}

GtkWidget *
folder_browser_new (const GNOME_Evolution_Shell shell)
{
    CORBA_Environment ev;
    FolderBrowser *folder_browser;
    
    CORBA_exception_init (&ev);

    folder_browser = gtk_type_new (folder_browser_get_type ());

    my_folder_browser_init (GTK_OBJECT (folder_browser));
    folder_browser->uri = NULL;

    folder_browser->shell = CORBA_Object_duplicate (shell, &ev);
    if (ev._major != CORBA_NO_EXCEPTION) {
        folder_browser->shell = CORBA_OBJECT_NIL;
        gtk_widget_destroy (GTK_WIDGET (folder_browser));
        CORBA_exception_free (&ev);
        return NULL;
    }

    CORBA_exception_free (&ev);

    return GTK_WIDGET (folder_browser);
}


E_MAKE_TYPE (folder_browser, "FolderBrowser", FolderBrowser, folder_browser_class_init, folder_browser_init, PARENT_TYPE);