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/* -*- 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 Helix Code, Inc.
 */
#include <config.h>
#include <ctype.h>
#include <gnome.h>
#include "e-util/e-util.h"
#include "e-util/e-sexp.h"
#include "folder-browser.h"
#include "mail.h"
#include "message-list.h"
#include <widgets/e-paned/e-vpaned.h>

#define PARENT_TYPE (gtk_table_get_type ())

static GtkObjectClass *folder_browser_parent_class;


static void
folder_browser_destroy (GtkObject *object)
{
    FolderBrowser *folder_browser = FOLDER_BROWSER (object);

    if (folder_browser->shell) {
        CORBA_Environment ev;

        CORBA_exception_init (&ev);
        Bonobo_Unknown_unref (folder_browser->shell, &ev);
        CORBA_exception_free (&ev);
    }
    
    if (folder_browser->uri)
        g_free (folder_browser->uri);

    if (folder_browser->folder) {
        camel_folder_sync (folder_browser->folder, FALSE, NULL);
        gtk_object_unref (GTK_OBJECT (folder_browser->folder));
    }
    
    if (folder_browser->message_list)
        bonobo_object_unref (BONOBO_OBJECT (folder_browser->message_list));

    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);
}

CamelFolder *
mail_uri_to_folder (const char *name)
{
    char *store_name, *msg;
    CamelStore *store = NULL;
    CamelFolder *folder = NULL;
    CamelException *ex;

    ex = camel_exception_new ();

    if (!strncmp (name, "vfolder:", 8)) {
        char *query, *newquery;
        store_name = g_strdup (name);
        query = strchr (store_name, '?');
        if (query) {
            *query++ = 0;
        } else {
            query = "";
        }
        newquery = g_strdup_printf("mbox?%s", query);
        store = camel_session_get_store (session, store_name, ex);

        if (store) {
            folder = camel_store_get_folder (store, newquery, TRUE, ex);
            /* FIXME: do this properly rather than hardcoding */
#warning "Find a way not to hardcode vfolder source"
            {
                char *source_name;
                CamelFolder *source_folder;
                extern char *evolution_dir;
                
                source_name = g_strdup_printf ("file://%s/local/Inbox", evolution_dir);
                source_folder = mail_uri_to_folder (source_name);
                g_free (source_name);
#warning "Not Good (tm). It might be better to have some sort of high level Camel interface for this"
                if (source_folder)
                    camel_vee_folder_add_folder (folder, source_folder);
            }
        }
        g_free (newquery);
        g_free (store_name);

    } else if (!strncmp (name, "imap:", 5)) {
        char *service, *ptr;
        
        service = g_strdup_printf ("%s/", name);
        for (ptr = service + 7; *ptr && *ptr != '/'; ptr++);
        ptr++;
        *ptr = '\0';
        
        store = camel_session_get_store (session, service, ex);
        g_free (service);

        if (store) {
            CamelURL *url = CAMEL_SERVICE (store)->url;
            char *tree_name, *folder_name, *dir_sep;

            /*dir_sep = CAMEL_IMAP_STORE (store)->dir_sep;*/

            for (ptr = (char *)(name + 7); *ptr && *ptr != '/'; ptr++);
            if (*ptr == '/') {
                if (url && url->path) {
                    ptr += strlen (url->path);
                    if (*ptr == '/')
                        ptr++;
                }

                if (*ptr == '/')
                    ptr++;
                /*for ( ; *ptr && *ptr == '/'; ptr++);*/

                folder_name = g_strdup (ptr);
                /*tree_name = g_strdup (ptr);*/
                /*folder_name = e_strreplace (tree_name, "/", dir_sep);*/
                
                folder = camel_store_get_folder (store, folder_name, TRUE, ex);
                g_free (folder_name);
            }
        }
    } else if (!strncmp(name, "news:", 5)) {
        store = camel_session_get_store (session, name, ex);
        if (store) {
            const char *folder_name;

            folder_name = name + 5;

            folder = camel_store_get_folder (store, folder_name, FALSE, ex);
        }
    } else if (!strncmp (name, "file:", 5)) {
        /* Change "file:" to "mbox:". */
        store_name = g_strdup_printf ("mbox:%s", name + 5);
        store = camel_session_get_store (session, store_name, ex);
        g_free (store_name);
        if (store) {
            folder = camel_store_get_folder (store, "mbox", FALSE, ex);
        }
    } else {
        msg = g_strdup_printf ("Can't open URI %s", name);
        gnome_error_dialog (msg);
        g_free (msg);
    }

    if (camel_exception_get_id (ex)) {
        msg = g_strdup_printf ("Unable to get folder %s: %s\n", name,
                       camel_exception_get_description (ex));
        gnome_error_dialog (msg);
        if (folder) {
            gtk_object_unref (GTK_OBJECT (folder));
            folder = NULL;
        }
    }
    camel_exception_free (ex);

    if (store)
        gtk_object_unref (GTK_OBJECT (store));

    return folder;
}

static gboolean
folder_browser_load_folder (FolderBrowser *fb, const char *name)
{
    CamelFolder *new_folder;

    new_folder = mail_uri_to_folder (name);
    if (!new_folder)
        return FALSE;

    if (fb->folder)
        gtk_object_unref (GTK_OBJECT (fb->folder));
    fb->folder = new_folder;
    
    gtk_widget_set_sensitive (GTK_WIDGET (fb->search_entry), camel_folder_has_search_capability (fb->folder));
    gtk_widget_set_sensitive (GTK_WIDGET (fb->search_menu), camel_folder_has_search_capability (fb->folder));

    message_list_set_folder (fb->message_list, new_folder);

    return TRUE;
}

#define EQUAL(a,b) (strcmp (a,b) == 0)

gboolean
folder_browser_set_uri (FolderBrowser *folder_browser, const char *uri)
{
    if (folder_browser->uri)
        g_free (folder_browser->uri);

    folder_browser->uri = g_strdup (uri);
    return folder_browser_load_folder (folder_browser, folder_browser->uri);
}

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

    g_warning ("FIXME: implement me");
}

static char * search_options[] = {
    "Body or subject contains",
    "Body contains",
    "Subject contains",
    "Body does not contain",
    "Subject does not contain",
    NULL
};

/* %s is replaced by the whole search string in quotes ...
   possibly could split the search string into words as well ? */
static char * search_string[] = {
    "(or (body-contains %s) (match-all (header-contains \"Subject\" %s)))",
    "(body-contains %s)",
    "(match-all (header-contains \"Subject\" %s)",
    "(match-all (not (body-contains %s)))",
    "(match-all (not (header-contains \"Subject\" %s)))"
};

static void
search_set(FolderBrowser *fb)
{
    GtkWidget *widget;
    GString *out;
    char *str;
    int index;
    char *text;

    text = gtk_entry_get_text((GtkEntry *)fb->search_entry);

    if (text == NULL || text[0] == 0) {
        message_list_regenerate (fb->message_list, NULL);
        return;
    }

    widget = gtk_menu_get_active (GTK_MENU(GTK_OPTION_MENU(fb->search_menu)->menu));
    index = (int)gtk_object_get_data((GtkObject *)widget, "search_option");
    if (index > sizeof(search_string)/sizeof(search_string[0]))
        index = 0;
    str = search_string[index];

    out = g_string_new("");
    while (*str) {
        if (str[0] == '%' && str[1]=='s') {
            str+=2;
            e_sexp_encode_string(out, text);
        } else {
            g_string_append_c(out, *str);
            str++;
        }
    }
    message_list_regenerate (fb->message_list, out->str);
    g_string_free(out, TRUE);
}

static void
search_menu_deactivate(GtkWidget *menu, FolderBrowser *fb)
{
    search_set(fb);
}

static GtkWidget *
create_option_menu (char **menu_list, int item, void *data)
{
    GtkWidget *omenu;
    GtkWidget *menu;
    int i = 0;
       
    omenu = gtk_option_menu_new ();
    menu = gtk_menu_new ();
    while (*menu_list){
        GtkWidget *entry;

        entry = gtk_menu_item_new_with_label (*menu_list);
        gtk_widget_show (entry);
        gtk_object_set_data((GtkObject *)entry, "search_option", (void *)i);
        gtk_menu_append (GTK_MENU (menu), entry);
        menu_list++;
        i++;
    }
    gtk_option_menu_set_menu (GTK_OPTION_MENU (omenu), menu);
    gtk_option_menu_set_history (GTK_OPTION_MENU (omenu), item);
    gtk_widget_show (omenu);

    gtk_signal_connect (GTK_OBJECT (menu), 
                "deactivate",
                GTK_SIGNAL_FUNC (search_menu_deactivate), data);

    return omenu;
}

static void
search_activate(GtkEntry *entry, FolderBrowser *fb)
{
    search_set(fb);
}

void
folder_browser_clear_search (FolderBrowser *fb)
{
    gtk_entry_set_text (GTK_ENTRY (fb->search_entry), "");
    gtk_option_menu_set_history (GTK_OPTION_MENU (fb->search_menu), 0);
    message_list_regenerate (fb->message_list, NULL);
}

static int
etable_key (ETable *table, int row, int col, GdkEvent *ev, FolderBrowser *fb)
{
    if ((ev->key.state & !(GDK_SHIFT_MASK | GDK_LOCK_MASK)) != 0)
        return FALSE;

    if (ev->key.keyval == GDK_space || ev->key.keyval == GDK_BackSpace) {
        GtkAdjustment *vadj;
        gfloat page_size;

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

        if (ev->key.keyval == GDK_BackSpace) {
            if (vadj->value > vadj->lower + page_size)
                vadj->value -= page_size;
            else
                vadj->value = vadj->lower;
        } else {
            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);
        return TRUE;
    } else if (ev->key.keyval == GDK_Delete ||
           ev->key.keyval == GDK_KP_Delete) {
        delete_msg (NULL, fb);
        message_list_select (fb->message_list, row,
                     MESSAGE_LIST_SELECT_NEXT,
                     0, CAMEL_MESSAGE_DELETED);
        return TRUE;
    } else if (ev->key.keyval == 'n' || ev->key.keyval == 'N' ||
           ev->key.keyval == 'p' || ev->key.keyval == 'P') {
        message_list_select (fb->message_list, row,
                     tolower (ev->key.keyval) == 'p' ?
                     MESSAGE_LIST_SELECT_PREVIOUS :
                     MESSAGE_LIST_SELECT_NEXT,
                     0, CAMEL_MESSAGE_SEEN);
    }

    return FALSE;
}

static void
folder_browser_gui_init (FolderBrowser *fb)
{
    GtkWidget *hbox, *label;

    /*
     * 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 entry */
    hbox = gtk_hbox_new(FALSE, 3);
    gtk_widget_show(hbox);
    fb->search_entry = gtk_entry_new();
    gtk_widget_show(fb->search_entry);
    gtk_signal_connect(GTK_OBJECT (fb->search_entry), "activate", search_activate, fb);
    /* gtk_signal_connect(fb->search_entry, "changed", search_activate, fb); */
    label = gtk_label_new("Search");
    gtk_widget_show(label);
    fb->search_menu = create_option_menu(search_options, 0, fb);
    gtk_box_pack_end((GtkBox *)hbox, fb->search_entry, FALSE, FALSE, 3);
    gtk_box_pack_end((GtkBox *)hbox, fb->search_menu, FALSE, FALSE, 3);
    gtk_box_pack_end((GtkBox *)hbox, label, FALSE, FALSE, 3);
    gtk_table_attach (
        GTK_TABLE (fb), hbox,
        0, 1, 0, 1,
        GTK_FILL | GTK_EXPAND,
        0,
        0, 0);

    fb->message_list_w = message_list_get_widget (fb->message_list);
    e_paned_add1 (E_PANED (fb->vpaned), fb->message_list_w);
    gtk_widget_show (fb->message_list_w);

    e_paned_add2 (E_PANED (fb->vpaned), GTK_WIDGET (fb->mail_display));
    e_paned_set_position (E_PANED (fb->vpaned), 200);

    gtk_widget_show (GTK_WIDGET (fb->mail_display));
    gtk_widget_show (GTK_WIDGET (fb));
}

static void
folder_browser_init (GtkObject *object)
{
}

static void
my_folder_browser_init (GtkObject *object)
{
    FolderBrowser *fb = FOLDER_BROWSER (object);

    /*
     * Setup parent class fields.
     */ 
    GTK_TABLE (fb)->homogeneous = FALSE;
    gtk_table_resize (GTK_TABLE (fb), 1, 2);

    /*
     * Our instance data
     */
    fb->message_list = MESSAGE_LIST (message_list_new (fb));
    fb->mail_display = MAIL_DISPLAY (mail_display_new (fb));

    gtk_signal_connect (GTK_OBJECT (fb->message_list->etable),
                "key_press", GTK_SIGNAL_FUNC (etable_key), fb);

    folder_browser_gui_init (fb);
}

GtkWidget *
folder_browser_new (void)
{
    static int serial;
    FolderBrowser *folder_browser = gtk_type_new (folder_browser_get_type ());

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

    return GTK_WIDGET (folder_browser);
}


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