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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * message-list.c: Displays the messages.
 *                 Implements CORBA's Evolution::MessageList
 *
 * Author:
 *     Miguel de Icaza (miguel@helixcode.com)
 *     Bertrand Guiheneuf (bg@aful.org)
 *
 * (C) 2000 Helix Code, Inc.
 */
#include <config.h>
#include <gnome.h>
#include <bonobo/bonobo-main.h>
#include "e-util/e-util.h"
#include "camel/camel-exception.h"
#include <camel/camel-folder.h>
#include "message-list.h"
#include "Mail.h"
#include "widgets/e-table/e-table-header-item.h"
#include "widgets/e-table/e-table-item.h"

#include "pixmaps.h"

/*
 * Default sizes for the ETable display
 *
 */
#define N_CHARS(x) (CHAR_WIDTH * (x))

#define COL_ICON_WIDTH        16
#define COL_CHECK_BOX_WIDTH   16
#define COL_FROM_WIDTH        N_CHARS(24)
#define COL_FROM_WIDTH_MIN    32
#define COL_SUBJECT_WIDTH     N_CHARS(30)
#define COL_SUBJECT_WIDTH_MIN 32
#define COL_SENT_WIDTH        N_CHARS(4) 
#define COL_SENT_WIDTH_MIN    1
#define COL_RECEIVE_WIDTH     N_CHARS(20)
#define COL_RECEIVE_WIDTH_MIN 32
#define COL_TO_WIDTH          N_CHARS(24)
#define COL_TO_WIDTH_MIN      32
#define COL_SIZE_WIDTH        N_CHARS(6)
#define COL_SIZE_WIDTH_MIN    32

#define PARENT_TYPE (bonobo_object_get_type ())

static BonoboObjectClass *message_list_parent_class;
static POA_Evolution_MessageList__vepv evolution_message_list_vepv;

static void
on_row_selection_cmd (ETable *table, 
              int row, 
              gboolean selected,
              gpointer user_data);


CamelMessageInfo *get_message_info(MessageList *message_list, gint row)
{
    CamelMessageInfo *info = NULL;

    if (message_list->matches) {
        char *uid;

        uid = g_list_nth_data(message_list->matches, row);
        if (uid) {
            info = camel_folder_summary_get_by_uid(message_list->folder, uid);
        } else {
            g_warning("trying to get data for nonexistant row %d", row);
        }
    } else {
        GPtrArray *msg_info_array;
        msg_info_array = camel_folder_summary_get_message_info 
            (message_list->folder, row, 1);
        if (msg_info_array && msg_info_array->len > 0) {
            info = msg_info_array->pdata[0];
        }
        g_ptr_array_free(msg_info_array, TRUE);
    }
    return info;
}

static void
message_changed(CamelMimeMessage *m, enum _MessageChangeType type, MessageList *message_list)
{
    e_table_model_changed (message_list->table_model);
}

/* select a message and display it */
static void
select_msg (MessageList *message_list, gint row)
{
    CamelException ex;
    CamelMimeMessage *message = NULL;

    camel_exception_init (&ex);

    if (camel_folder_has_uid_capability  (message_list->folder)) {
        CamelMessageInfo *msg_info;

        msg_info = get_message_info(message_list, row);
        if (msg_info) {
            message = camel_folder_get_message_by_uid (message_list->folder, 
                                   msg_info->uid,
                                   &ex);
            if (camel_exception_get_id (&ex)) {
                printf ("Unable to get message: %s\n",
                    ex.desc?ex.desc:"unknown_reason");
                return;
            }
        }
        
        if (message) {
            gtk_signal_connect((GtkObject *)message, "message_changed", message_changed, message_list);
            mail_display_set_message (message_list->parent_folder_browser->mail_display,
                          CAMEL_MEDIUM (message));
        }
    }
    
}

/*
 * SimpleTableModel::col_count
 */
static int
ml_col_count (ETableModel *etm, void *data)
{
    return COL_LAST;
}

/*
 * SimpleTableModel::row_count
 */
static int
ml_row_count (ETableModel *etm, void *data)
{
    MessageList *message_list = data;
    CamelException ex;
    int v;
    
    if (!message_list->folder) {
        return 0;
    }

    if (message_list->matches) {
        v = g_list_length(message_list->matches);
    } else {
        camel_exception_init (&ex);
    
        v = camel_folder_get_message_count (message_list->folder, &ex);
        if (camel_exception_get_id (&ex))
            v = 0;
    }

    /* in the case where no message is available, return 1
     * however, cause we want to be able to show a text */
    return (v ? v:1);
    
}

static void *
ml_value_at (ETableModel *etm, int col, int row, void *data)
{
    static char buffer [10];
    MessageList *message_list = data;
    CamelFolder *folder;
    CamelMessageInfo *msg_info;
    CamelException ex;
    void *retval = NULL;

    camel_exception_init (&ex);
    
    folder = message_list->folder;
    if (!folder)
        goto nothing_to_see;
    
    
    /* retrieve the message information array */
    msg_info = get_message_info(message_list, row);

    /* 
     * in the case where it is zero message long 
     * display nothing 
     */
    if (msg_info == NULL)
        goto nothing_to_see;
    
    switch (col){
    case COL_ONLINE_STATUS:
        retval = GINT_TO_POINTER (0);
        break;
        
    case COL_MESSAGE_STATUS:
        if (msg_info->flags & CAMEL_MESSAGE_DELETED)
            retval = GINT_TO_POINTER (2);
        else
            retval = GINT_TO_POINTER (1);
        break;
        
    case COL_PRIORITY:
        retval = GINT_TO_POINTER (1);
        break;
        
    case COL_ATTACHMENT:
        retval = GINT_TO_POINTER (0);
        break;
        
    case COL_FROM:
        if (msg_info->from)
            retval = msg_info->from;
        else
            retval = "";
        break;
        
    case COL_SUBJECT:
        if (msg_info->subject)
            retval = msg_info->subject;
        else
            retval = "";
        break;
        
    case COL_SENT:
        retval = "sent";
        break;
        
    case COL_RECEIVE:
        retval = "receive";
        break;
        
    case COL_TO:
        retval = "dudes@server";
        break;
        
    case COL_SIZE:
        if (msg_info->content) {
            sprintf (buffer, "%d", msg_info->content->size);
        } else {
            sprintf (buffer, "0");
        }
        retval = buffer;
        break;
            
    default:
        g_assert_not_reached ();
    }

    return retval;
    
    
 nothing_to_see:
    /* 
     * in the case there is nothing to look at, 
     * notify the user.
     */
    if (col == COL_SUBJECT)
        return "No item in this view";
    else 
        return NULL;      
}

static void
ml_set_value_at (ETableModel *etm, int col, int row, const void *value, void *data)
{
}

static gboolean
ml_is_cell_editable (ETableModel *etm, int col, int row, void *data)
{
    return FALSE;
}

static void *
ml_duplicate_value (ETableModel *etm, int col, const void *value, void *data)
{
    switch (col){
    case COL_ONLINE_STATUS:
    case COL_MESSAGE_STATUS:
    case COL_PRIORITY:
    case COL_ATTACHMENT:
        return (void *) value;

    case COL_FROM:
    case COL_SUBJECT:
    case COL_SENT:
    case COL_RECEIVE:
    case COL_TO:
    case COL_SIZE:
        return g_strdup (value);
    default:
        g_assert_not_reached ();
    }
    return NULL;
}

static void
ml_free_value (ETableModel *etm, int col, void *value, void *data)
{
    switch (col){
    case COL_ONLINE_STATUS:
    case COL_MESSAGE_STATUS:
    case COL_PRIORITY:
    case COL_ATTACHMENT:
        break;

    case COL_FROM:
    case COL_SUBJECT:
    case COL_SENT:
    case COL_RECEIVE:
    case COL_TO:
    case COL_SIZE:
        g_free (value);
        break;
    default:
        g_assert_not_reached ();
    }
}

static void
ml_thaw (ETableModel *etm, void *data)
{
    e_table_model_changed (etm);
}

static struct {
    char **image_base;
    GdkPixbuf  *pixbuf;
} states_pixmaps [] = {
    { envelope_opened_xpm,   NULL },
    { envelope_closed_xpm,   NULL },
    { empty_xpm,             NULL },
    { attachment_xpm,        NULL },
    { attachment_header_xpm, NULL },
    { online_status_xpm,     NULL },
    { message_status_xpm,    NULL },
    { envelope_deleted_xpm,  NULL },
    { NULL,                  NULL },
};

static void
message_list_init_images (void)
{
    int i;

    /*
     * Only load once, and share
     */
    if (states_pixmaps [0].pixbuf)
        return;
    
    for (i = 0; states_pixmaps [i].image_base; i++){
        states_pixmaps [i].pixbuf = gdk_pixbuf_new_from_xpm_data (
            (const char **) states_pixmaps [i].image_base);
    }
}

static void
message_list_init_renderers (MessageList *message_list)
{
    g_assert (message_list);
    g_assert (message_list->table_model);

    message_list->render_text = e_cell_text_new (
        message_list->table_model,
        NULL, GTK_JUSTIFY_LEFT);

    message_list->render_online_status = e_cell_checkbox_new ();

    /*
     * Message status
     */
    {
        GdkPixbuf *images [3];

        images [0] = states_pixmaps [0].pixbuf;
        images [1] = states_pixmaps [1].pixbuf;
        images [2] = states_pixmaps [7].pixbuf;
        
        message_list->render_message_status = e_cell_toggle_new (0, 3, images);
    }

    /*
     * Attachment
     */
    {
        GdkPixbuf *images [2];

        images [0] = states_pixmaps [2].pixbuf;
        images [1] = states_pixmaps [3].pixbuf;
        
        message_list->render_attachment = e_cell_toggle_new (0, 2, images);
    }
    
    /*
     * FIXME: We need a real renderer here
     */
    message_list->render_priority = e_cell_checkbox_new ();
}

#define CHAR_WIDTH 10
static void
message_list_init_header (MessageList *message_list)
{
    int i;
    
    /*
     * FIXME:
     *
     * Use the font metric to compute this.
     */
    
    message_list->header_model = e_table_header_new ();
    gtk_object_ref (GTK_OBJECT (message_list->header_model));
    gtk_object_sink (GTK_OBJECT (message_list->header_model));

    message_list->table_cols [COL_ONLINE_STATUS] =
        e_table_col_new_with_pixbuf (
            COL_ONLINE_STATUS, states_pixmaps [5].pixbuf,
            COL_CHECK_BOX_WIDTH, COL_CHECK_BOX_WIDTH,
            message_list->render_online_status,
            g_int_compare, FALSE);
    
    message_list->table_cols [COL_MESSAGE_STATUS] =
        e_table_col_new_with_pixbuf (
            COL_MESSAGE_STATUS, states_pixmaps [0].pixbuf,
            COL_CHECK_BOX_WIDTH, COL_CHECK_BOX_WIDTH,
            message_list->render_message_status, 
            g_int_compare, FALSE);

    message_list->table_cols [COL_PRIORITY] =
        e_table_col_new (
            COL_PRIORITY, _("Priority"),
            COL_CHECK_BOX_WIDTH, COL_CHECK_BOX_WIDTH,
            message_list->render_priority,
            g_int_compare, FALSE);
    
    message_list->table_cols [COL_ATTACHMENT] =
        e_table_col_new_with_pixbuf (
            COL_ATTACHMENT, states_pixmaps [4].pixbuf,
            COL_ICON_WIDTH, COL_ICON_WIDTH,
            message_list->render_attachment,
            g_int_compare, FALSE);

    message_list->table_cols [COL_FROM] =
        e_table_col_new (
            COL_FROM, _("From"),
            COL_FROM_WIDTH, COL_FROM_WIDTH_MIN,
            message_list->render_text,
            g_str_compare, TRUE);

    message_list->table_cols [COL_SUBJECT] =
        e_table_col_new (
            COL_SUBJECT, _("Subject"),
            COL_SUBJECT_WIDTH, COL_SUBJECT_WIDTH_MIN,
            message_list->render_text,
            g_str_compare, TRUE);

    message_list->table_cols [COL_SENT] =
        e_table_col_new (
            COL_SENT, _("Sent"),
            COL_SENT_WIDTH, COL_SENT_WIDTH_MIN,
            message_list->render_text,
            g_str_compare, TRUE);
    
    message_list->table_cols [COL_RECEIVE] =
        e_table_col_new (
            COL_RECEIVE, _("Receive"),
            COL_RECEIVE_WIDTH, COL_RECEIVE_WIDTH_MIN,
            message_list->render_text,
            g_str_compare, TRUE);

    message_list->table_cols [COL_TO] =
        e_table_col_new (
            COL_TO, _("To"),
            COL_TO_WIDTH, COL_TO_WIDTH_MIN,
            message_list->render_text,
            g_str_compare, TRUE);

    message_list->table_cols [COL_SIZE] =
        e_table_col_new (
            COL_SIZE, _("Size"),
            COL_SIZE_WIDTH, COL_SIZE_WIDTH_MIN,
            message_list->render_text,
            g_str_compare, TRUE);
    
    /*
     * Dummy init: It setups the headers to match the order in which
     * they are defined.  In the future e-table widget will take care
     * of this.
     */
    for (i = 0; i < COL_LAST; i++) {
        gtk_object_ref (GTK_OBJECT (message_list->table_cols [i]));
        e_table_header_add_column (message_list->header_model,
                       message_list->table_cols [i], i);
    }
}

static char *
message_list_get_layout (MessageList *message_list)
{
    if (0)
        return g_strdup ("<ETableSpecification> <columns-shown> <column> 0 </column> <column> 1 </column> <column> 2 </column> <column> 3 </column> <column> 4 </column> <column> 5 </column> <column> 6 </column> <column> 7 </column> <column> 8 </column> <column> 9 </column> </columns-shown> <grouping> <group column=\"4\" ascending=\"1\"> <leaf column=\"5\" ascending=\"1\"/> </group> </grouping> </ETableSpecification>");
    else {
        /* Message status, From, Sent, Subject */
        return g_strdup ("<ETableSpecification> <columns-shown> <column> 1 </column> <column> 4 </column> <column> 5 </column> </columns-shown> <grouping> </grouping> </ETableSpecification>");
    }
}

/*
 * GtkObject::init
 */
static void
message_list_init (GtkObject *object)
{
    MessageList *message_list = MESSAGE_LIST (object);
    char *spec;
        
    message_list->table_model = e_table_simple_new (
        ml_col_count, ml_row_count, ml_value_at,
        ml_set_value_at, ml_is_cell_editable, ml_duplicate_value, ml_free_value,
        ml_thaw, message_list);

    message_list_init_renderers (message_list);
    message_list_init_header (message_list);

    /*
     * The etable
     */

    spec = message_list_get_layout (message_list);
    message_list->etable = e_table_new (
        message_list->header_model, message_list->table_model, spec);
    g_free (spec);
    
    gtk_signal_connect (GTK_OBJECT (message_list->etable), "row_selection",
               GTK_SIGNAL_FUNC (on_row_selection_cmd), message_list);

    gtk_widget_show (message_list->etable);
    
    gtk_object_ref (GTK_OBJECT (message_list->table_model));
    gtk_object_sink (GTK_OBJECT (message_list->table_model));
    
    /*
     * We do own the Etable, not some widget container
     */
    gtk_object_ref (GTK_OBJECT (message_list->etable));
    gtk_object_sink (GTK_OBJECT (message_list->etable));
}

static void
message_list_destroy (GtkObject *object)
{
    MessageList *message_list = MESSAGE_LIST (object);
    int i;

    
    gtk_object_unref (GTK_OBJECT (message_list->table_model));
    gtk_object_unref (GTK_OBJECT (message_list->header_model));
    
    /*
     * Renderers
     */
    gtk_object_unref (GTK_OBJECT (message_list->render_text));
    gtk_object_unref (GTK_OBJECT (message_list->render_online_status));
    gtk_object_unref (GTK_OBJECT (message_list->render_message_status));
    gtk_object_unref (GTK_OBJECT (message_list->render_priority));
    gtk_object_unref (GTK_OBJECT (message_list->render_attachment));
    
    gtk_object_unref (GTK_OBJECT (message_list->etable));

    for (i = 0; i < COL_LAST; i++)
        gtk_object_unref (GTK_OBJECT (message_list->table_cols [i]));
    
    GTK_OBJECT_CLASS (message_list_parent_class)->destroy (object);
}

/*
 * CORBA method: Evolution::MessageList::select_message
 */
static void
MessageList_select_message (PortableServer_Servant _servant,
                const CORBA_long message_number,
                CORBA_Environment *ev)
{
    printf ("FIXME: select message method\n");
}

/*
 * CORBA method: Evolution::MessageList::open_message
 */
static void
MessageList_open_message (PortableServer_Servant _servant,
              const CORBA_long message_number,
              CORBA_Environment *ev)
{
    printf ("FIXME: open message method\n");
}

static POA_Evolution_MessageList__epv *
evolution_message_list_get_epv (void)
{
    POA_Evolution_MessageList__epv *epv;

    epv = g_new0 (POA_Evolution_MessageList__epv, 1);

    epv->select_message = MessageList_select_message;
    epv->open_message   = MessageList_open_message;

    return epv;
}

static void
message_list_corba_class_init (void)
{
    evolution_message_list_vepv.Bonobo_Unknown_epv = bonobo_object_get_epv ();
    evolution_message_list_vepv.Evolution_MessageList_epv = evolution_message_list_get_epv ();
}

/*
 * GtkObjectClass::init
 */
static void
message_list_class_init (GtkObjectClass *object_class)
{
    message_list_parent_class = gtk_type_class (PARENT_TYPE);

    object_class->destroy = message_list_destroy;

    message_list_corba_class_init ();

    message_list_init_images ();
}

static void
message_list_construct (MessageList *message_list, Evolution_MessageList corba_message_list)
{
    bonobo_object_construct (BONOBO_OBJECT (message_list), corba_message_list);
}

static Evolution_MessageList
create_corba_message_list (BonoboObject *object)
{
    POA_Evolution_MessageList *servant;
    CORBA_Environment ev;

    servant = (POA_Evolution_MessageList *) g_new0 (BonoboObjectServant, 1);
    servant->vepv = &evolution_message_list_vepv;

    CORBA_exception_init (&ev);
    POA_Evolution_MessageList__init ((PortableServer_Servant) servant, &ev);
    if (ev._major != CORBA_NO_EXCEPTION){
        g_free (servant);
        CORBA_exception_free (&ev);
        return CORBA_OBJECT_NIL;
    }

    CORBA_exception_free (&ev);
    return (Evolution_MessageList) bonobo_object_activate_servant (object, servant);
}

BonoboObject *
message_list_new (FolderBrowser *parent_folder_browser)
{
    Evolution_MessageList corba_object;
    MessageList *message_list;

    g_assert (parent_folder_browser);

    message_list = gtk_type_new (message_list_get_type ());

    corba_object = create_corba_message_list (BONOBO_OBJECT (message_list));
    if (corba_object == CORBA_OBJECT_NIL){
        gtk_object_destroy (GTK_OBJECT (message_list));
        return NULL;
    }

    message_list->parent_folder_browser = parent_folder_browser;

    message_list->idle_id = 0;

    message_list_construct (message_list, corba_object);

    return BONOBO_OBJECT (message_list);
}

void
message_list_set_search (MessageList *message_list, const char *search)
{
    if (message_list->matches) {
        /* FIXME: free contents too ... */
        g_list_free(message_list->matches);
        message_list->matches = NULL;
    }
    g_free(message_list->search);
    if (search) {
        CamelException ex;

        camel_exception_init (&ex);
        message_list->matches = camel_folder_search_by_expression(message_list->folder, search, &ex);
        message_list->search = g_strdup(search);
    }

    e_table_model_changed (message_list->table_model);
    select_msg (message_list, 0);
}

static void
folder_changed(CamelFolder *f, int type, MessageList *message_list)
{
    message_list_set_search(message_list, message_list->search);
}

void
message_list_set_folder (MessageList *message_list, CamelFolder *camel_folder)
{
    CamelException ex;
    gboolean folder_exists;

    g_return_if_fail (message_list != NULL);
    g_return_if_fail (camel_folder != NULL);
    g_return_if_fail (IS_MESSAGE_LIST (message_list));
    g_return_if_fail (CAMEL_IS_FOLDER (camel_folder));
    g_return_if_fail (camel_folder_has_summary_capability (camel_folder));

    if (message_list->matches) {
        /* FIXME: free contents too ... */
        g_list_free(message_list->matches);
        message_list->matches = NULL;
    }
    
    camel_exception_init (&ex);
    
    if (message_list->folder)
        gtk_object_unref (GTK_OBJECT (message_list->folder));

    message_list->folder = camel_folder;
    
    folder_exists = camel_folder_exists (camel_folder, NULL);
    
    if (camel_exception_get_id (&ex)) {
          printf ("Unable to test for folder existence: %s\n",
              ex.desc?ex.desc:"unknown reason");
          return;
    }
    
    if (!folder_exists) {     
        g_warning ("Folder does not exist, creating it\n");
        /* 
           if you don't want the directory to be created
           automatically here remove this.
        */
        camel_folder_create (camel_folder, &ex);
        if (camel_exception_get_id (&ex)) {
          printf ("Unable to create folder: %s\n",
              ex.desc?ex.desc:"unknown_reason");
          return;
        }
       
    }

    camel_folder_open (camel_folder, FOLDER_OPEN_RW, &ex);
    if (camel_exception_get_id (&ex)) {
        printf ("Unable to open folder: %s\n",
            ex.desc?ex.desc:"unknown_reason");    
        return;
    }

    gtk_signal_connect((GtkObject *)camel_folder, "folder_changed", folder_changed, message_list);

    gtk_object_ref (GTK_OBJECT (camel_folder));
    
    e_table_model_changed (message_list->table_model);

    select_msg (message_list, 0);
}

GtkWidget *
message_list_get_widget (MessageList *message_list)
{
    return message_list->etable;
}

E_MAKE_TYPE (message_list, "MessageList", MessageList, message_list_class_init, message_list_init, PARENT_TYPE);

static gboolean
on_row_selection_idle (gpointer data)
{
    MessageList *message_list = data;

    select_msg (message_list, message_list->row_to_select);

    message_list->idle_id = 0;
    return FALSE;
}

static void
on_row_selection_cmd (ETable *table, 
              int row, 
              gboolean selected,
              gpointer user_data)
{
    if (selected) {
        MessageList *message_list;

        message_list = MESSAGE_LIST (user_data);

        message_list->row_to_select = row;

        if (!message_list->idle_id)
            g_idle_add_full (G_PRIORITY_LOW, on_row_selection_idle, message_list, NULL);
    }
}