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path: root/addressbook/gui/widgets/e-addressbook-model.c
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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 *
 * Author:
 *   Christopher James Lahey <clahey@ximian.com>
 *
 * (C) 1999 Ximian, Inc.
 */

#include <config.h>
#include "eab-marshal.h"
#include "e-addressbook-model.h"
#include <libxml/tree.h>
#include <libxml/parser.h>
#include <libxml/xmlmemory.h>
#include <gnome.h>
#include <misc/e-gui-utils.h>
#include "eab-gui-util.h"

#define PARENT_TYPE G_TYPE_OBJECT
static GObjectClass *parent_class;

/*
 * EABModel callbacks
 * These are the callbacks that define the behavior of our custom model.
 */
static void eab_model_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
static void eab_model_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);


enum {
    PROP_0,
    PROP_BOOK,
    PROP_QUERY,
    PROP_EDITABLE,
};

enum {
    WRITABLE_STATUS,
    STATUS_MESSAGE,
    SEARCH_STARTED,
    SEARCH_RESULT,
    FOLDER_BAR_MESSAGE,
    CONTACT_ADDED,
    CONTACTS_REMOVED,
    CONTACT_CHANGED,
    MODEL_CHANGED,
    STOP_STATE_CHANGED,
    BACKEND_DIED,
    LAST_SIGNAL
};

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

static void
free_data (EABModel *model)
{
    if (model->data) {
        int i;

        for ( i = 0; i < model->data_count; i++ ) {
            g_object_unref (model->data[i]);
        }

        g_free(model->data);
        model->data = NULL;
        model->data_count = 0;
        model->allocated_count = 0;
    }
}

static void
remove_book_view(EABModel *model)
{
    if (model->book_view && model->create_contact_id)
        g_signal_handler_disconnect (model->book_view,
                         model->create_contact_id);
    if (model->book_view && model->remove_contact_id)
        g_signal_handler_disconnect (model->book_view,
                         model->remove_contact_id);
    if (model->book_view && model->modify_contact_id)
        g_signal_handler_disconnect (model->book_view,
                         model->modify_contact_id);
    if (model->book_view && model->status_message_id)
        g_signal_handler_disconnect (model->book_view,
                         model->status_message_id);
    if (model->book_view && model->sequence_complete_id)
        g_signal_handler_disconnect (model->book_view,
                         model->sequence_complete_id);

    model->create_contact_id = 0;
    model->remove_contact_id = 0;
    model->modify_contact_id = 0;
    model->status_message_id = 0;
    model->sequence_complete_id = 0;

    model->search_in_progress = FALSE;

    if (model->book_view) {
        e_book_view_stop (model->book_view);
        g_object_unref (model->book_view);
        model->book_view = NULL;
    }
}

static void
addressbook_dispose(GObject *object)
{
    EABModel *model = EAB_MODEL(object);

    remove_book_view(model);
    free_data (model);

    if (model->book) {
        if (model->writable_status_id)
            g_signal_handler_disconnect (model->book,
                             model->writable_status_id);
        model->writable_status_id = 0;

        if (model->backend_died_id)
            g_signal_handler_disconnect (model->book,
                             model->backend_died_id);
        model->backend_died_id = 0;

        g_object_unref (model->book);
        model->book = NULL;
    }

    if (model->query) {
        e_book_query_unref (model->query);
        model->query = NULL;
    }

    if (G_OBJECT_CLASS(parent_class)->dispose)
        G_OBJECT_CLASS(parent_class)->dispose(object);
}

static void
update_folder_bar_message (EABModel *model)
{
    int count;
    char *message;

    count = model->data_count;

    switch (count) {
    case 0:
        message = g_strdup (_("No contacts"));
        break;
    default:
        message = g_strdup_printf (ngettext("%d contact", "%d contacts", count), count);
        break;
    }

    g_signal_emit (model,
               eab_model_signals [FOLDER_BAR_MESSAGE], 0,
               message);

    g_free (message);
}

static void
create_contact(EBookView *book_view,
           const GList *contacts,
           EABModel *model)
{
    int old_count = model->data_count;
    int length = g_list_length ((GList *)contacts);

    if (model->data_count + length > model->allocated_count) {
        while (model->data_count + length > model->allocated_count)
            model->allocated_count = model->allocated_count * 2 + 1;
        model->data = g_renew(EContact *, model->data, model->allocated_count);
    }

    for ( ; contacts; contacts = contacts->next) {
        model->data[model->data_count++] = contacts->data;
        g_object_ref (contacts->data);
    }

    g_signal_emit (model,
               eab_model_signals [CONTACT_ADDED], 0,
               old_count, model->data_count - old_count);

    update_folder_bar_message (model);
}

static void
remove_contact(EBookView *book_view,
           GList *ids,
           EABModel *model)
{
    /* XXX we should keep a hash around instead of this O(n*m) loop */
    gint i = 0;
    GList *l;
    GArray *indices;

    indices = g_array_new (FALSE, FALSE, sizeof (gint));
    for (l = ids; l; l = l->next) {
        char *id = l->data;
        for ( i = 0; i < model->data_count; i++) {
            if ( !strcmp(e_contact_get_const (model->data[i], E_CONTACT_UID), id) ) {
                g_object_unref (model->data[i]);
                memmove(model->data + i, model->data + i + 1, (model->data_count - i - 1) * sizeof (EContact *));
                model->data_count--;
                g_array_append_val (indices, i);
                break;
            }
        }
    }
    g_signal_emit (model,
               eab_model_signals [CONTACTS_REMOVED], 0,
               indices);
    g_array_free (indices, FALSE);
    update_folder_bar_message (model);
}

static void
modify_contact(EBookView *book_view,
           const GList *contacts,
           EABModel *model)
{
    for ( ; contacts; contacts = contacts->next) {
        int i;
        for ( i = 0; i < model->data_count; i++) {
            if ( !strcmp(e_contact_get_const(model->data[i], E_CONTACT_UID),
                     e_contact_get_const(E_CONTACT(contacts->data), E_CONTACT_UID)) ) {
                g_object_unref (model->data[i]);
                model->data[i] = e_contact_duplicate(E_CONTACT(contacts->data));
                g_signal_emit (model,
                           eab_model_signals [CONTACT_CHANGED], 0,
                           i);
                break;
            }
        }
    }
}

static void
status_message (EBookView *book_view,
        char* status,
        EABModel *model)
{
    g_signal_emit (model,
               eab_model_signals [STATUS_MESSAGE], 0,
               status);
}

static void
sequence_complete (EBookView *book_view,
           EBookViewStatus status,
           EABModel *model)
{
    model->search_in_progress = FALSE;
    status_message (book_view, NULL, model);
    g_signal_emit (model,
               eab_model_signals [SEARCH_RESULT], 0,
               status);
    g_signal_emit (model,
               eab_model_signals [STOP_STATE_CHANGED], 0);
}

static void
writable_status (EBook *book,
         gboolean writable,
         EABModel *model)
{
    if (!model->editable_set) {
        model->editable = writable;

        g_signal_emit (model,
                   eab_model_signals [WRITABLE_STATUS], 0,
                   writable);
    }
}

static void
backend_died (EBook *book,
          EABModel *model)
{
    g_signal_emit (model,
               eab_model_signals [BACKEND_DIED], 0);
}

static void
eab_model_class_init (GObjectClass *object_class)
{
    parent_class = g_type_class_ref (PARENT_TYPE);

    object_class->dispose = addressbook_dispose;
    object_class->set_property   = eab_model_set_property;
    object_class->get_property   = eab_model_get_property;

    g_object_class_install_property (object_class, PROP_BOOK,
                     g_param_spec_object ("book",
                                  _("Book"),
                                  /*_( */"XXX blurb" /*)*/,
                                  E_TYPE_BOOK,
                                  G_PARAM_READWRITE));

    g_object_class_install_property (object_class, PROP_QUERY,
                     g_param_spec_string ("query",
                                  _("Query"),
                                  /*_( */"XXX blurb" /*)*/,
                                  NULL,
                                  G_PARAM_READWRITE));

    g_object_class_install_property (object_class, PROP_EDITABLE,
                     g_param_spec_boolean ("editable",
                                   _("Editable"),
                                   /*_( */"XXX blurb" /*)*/,
                                   FALSE,
                                   G_PARAM_READWRITE));

    eab_model_signals [WRITABLE_STATUS] =
        g_signal_new ("writable_status",
                  G_OBJECT_CLASS_TYPE (object_class),
                  G_SIGNAL_RUN_LAST,
                  G_STRUCT_OFFSET (EABModelClass, writable_status),
                  NULL, NULL,
                  eab_marshal_NONE__BOOL,
                  G_TYPE_NONE,
                  1, G_TYPE_BOOLEAN);

    eab_model_signals [STATUS_MESSAGE] =
        g_signal_new ("status_message",
                  G_OBJECT_CLASS_TYPE (object_class),
                  G_SIGNAL_RUN_LAST,
                  G_STRUCT_OFFSET (EABModelClass, status_message),
                  NULL, NULL,
                  eab_marshal_NONE__POINTER,
                  G_TYPE_NONE,
                  1, G_TYPE_POINTER);

    eab_model_signals [SEARCH_STARTED] =
        g_signal_new ("search_started",
                  G_OBJECT_CLASS_TYPE (object_class),
                  G_SIGNAL_RUN_LAST,
                  G_STRUCT_OFFSET (EABModelClass, search_started),
                  NULL, NULL,
                  eab_marshal_NONE__NONE,
                  G_TYPE_NONE, 0);
    
    eab_model_signals [SEARCH_RESULT] =
        g_signal_new ("search_result",
                  G_OBJECT_CLASS_TYPE (object_class),
                  G_SIGNAL_RUN_LAST,
                  G_STRUCT_OFFSET (EABModelClass, search_result),
                  NULL, NULL,
                  eab_marshal_NONE__INT,
                  G_TYPE_NONE, 1, G_TYPE_INT);
    
    eab_model_signals [FOLDER_BAR_MESSAGE] =
        g_signal_new ("folder_bar_message",
                  G_OBJECT_CLASS_TYPE (object_class),
                  G_SIGNAL_RUN_LAST,
                  G_STRUCT_OFFSET (EABModelClass, folder_bar_message),
                  NULL, NULL,
                  eab_marshal_NONE__POINTER,
                  G_TYPE_NONE, 1, G_TYPE_POINTER);

    eab_model_signals [CONTACT_ADDED] =
        g_signal_new ("contact_added",
                  G_OBJECT_CLASS_TYPE (object_class),
                  G_SIGNAL_RUN_LAST,
                  G_STRUCT_OFFSET (EABModelClass, contact_added),
                  NULL, NULL,
                  eab_marshal_NONE__INT_INT,
                  G_TYPE_NONE, 2, G_TYPE_INT, G_TYPE_INT);

    eab_model_signals [CONTACTS_REMOVED] =
        g_signal_new ("contacts_removed",
                  G_OBJECT_CLASS_TYPE (object_class),
                  G_SIGNAL_RUN_LAST,
                  G_STRUCT_OFFSET (EABModelClass, contacts_removed),
                  NULL, NULL,
                  eab_marshal_NONE__POINTER,
                  G_TYPE_NONE, 1, G_TYPE_POINTER);

    eab_model_signals [CONTACT_CHANGED] =
        g_signal_new ("contact_changed",
                  G_OBJECT_CLASS_TYPE (object_class),
                  G_SIGNAL_RUN_LAST,
                  G_STRUCT_OFFSET (EABModelClass, contact_changed),
                  NULL, NULL,
                  eab_marshal_NONE__INT,
                  G_TYPE_NONE, 1, G_TYPE_INT);

    eab_model_signals [MODEL_CHANGED] =
        g_signal_new ("model_changed",
                  G_OBJECT_CLASS_TYPE (object_class),
                  G_SIGNAL_RUN_LAST,
                  G_STRUCT_OFFSET (EABModelClass, model_changed),
                  NULL, NULL,
                  eab_marshal_NONE__NONE,
                  G_TYPE_NONE, 0);

    eab_model_signals [STOP_STATE_CHANGED] =
        g_signal_new ("stop_state_changed",
                  G_OBJECT_CLASS_TYPE (object_class),
                  G_SIGNAL_RUN_LAST,
                  G_STRUCT_OFFSET (EABModelClass, stop_state_changed),
                  NULL, NULL,
                  eab_marshal_NONE__NONE,
                  G_TYPE_NONE, 0);

    eab_model_signals [BACKEND_DIED] =
        g_signal_new ("backend_died",
                  G_OBJECT_CLASS_TYPE (object_class),
                  G_SIGNAL_RUN_LAST,
                  G_STRUCT_OFFSET (EABModelClass, backend_died),
                  NULL, NULL,
                  eab_marshal_NONE__NONE,
                  G_TYPE_NONE, 0);
}

static void
eab_model_init (GObject *object)
{
    EABModel *model = EAB_MODEL(object);
    model->book = NULL;
    model->query = e_book_query_any_field_contains ("");
    model->book_view = NULL;
    model->create_contact_id = 0;
    model->remove_contact_id = 0;
    model->modify_contact_id = 0;
    model->status_message_id = 0;
    model->writable_status_id = 0;
    model->backend_died_id = 0;
    model->sequence_complete_id = 0;
    model->data = NULL;
    model->data_count = 0;
    model->allocated_count = 0;
    model->search_in_progress = FALSE;
    model->editable = FALSE;
    model->editable_set = FALSE;
    model->first_get_view = TRUE;
}

static void
book_view_loaded (EBook *book, EBookStatus status, EBookView *book_view, gpointer closure)
{
    EABModel *model = closure;

    if (status != E_BOOK_ERROR_OK) {
        eab_error_dialog (_("Error getting book view"), status);
        return;
    }

    remove_book_view (model);
    free_data (model);

    model->book_view = book_view;
    if (model->book_view)
        g_object_ref (model->book_view);
    model->create_contact_id = g_signal_connect(model->book_view,
                            "contacts_added",
                            G_CALLBACK (create_contact),
                            model);
    model->remove_contact_id = g_signal_connect(model->book_view,
                            "contacts_removed",
                            G_CALLBACK (remove_contact),
                            model);
    model->modify_contact_id = g_signal_connect(model->book_view,
                            "contacts_changed",
                            G_CALLBACK(modify_contact),
                            model);
    model->status_message_id = g_signal_connect(model->book_view,
                            "status_message",
                            G_CALLBACK(status_message),
                            model);
    model->sequence_complete_id = g_signal_connect(model->book_view,
                               "sequence_complete",
                               G_CALLBACK(sequence_complete),
                               model);

    model->search_in_progress = TRUE;
    g_signal_emit (model,
               eab_model_signals [MODEL_CHANGED], 0);
    g_signal_emit (model,
               eab_model_signals [SEARCH_STARTED], 0);
    g_signal_emit (model,
               eab_model_signals [STOP_STATE_CHANGED], 0);

    e_book_view_start (model->book_view);
}

static void
get_view (EABModel *model)
{
    gboolean success;

    if (model->book && model->query) {
        ESource *source;
        const char *limit_str;
        int limit = -1;

        source = e_book_get_source (model->book);

        limit_str = e_source_get_property (source, "limit");
        if (limit_str && *limit_str)
            limit = atoi (limit_str);

        remove_book_view(model);

        if (model->first_get_view) {
            model->first_get_view = FALSE;

            if (e_book_check_static_capability (model->book, "do-initial-query")) {
                success = e_book_async_get_book_view (model->book, model->query, NULL, limit, book_view_loaded, model);
            } else {
                free_data (model);

                g_signal_emit (model,
                           eab_model_signals [MODEL_CHANGED], 0);
                g_signal_emit (model,
                           eab_model_signals [STOP_STATE_CHANGED], 0);
                return;
            }
        }
        else
            success = e_book_async_get_book_view (model->book, model->query, NULL, limit, book_view_loaded, model);

    }
}

static gboolean
get_view_idle (EABModel *model)
{
    model->book_view_idle_id = 0;
    get_view (model);
    g_object_unref (model);
    return FALSE;
}


EContact *
eab_model_get_contact(EABModel *model,
              int       row)
{
    if (model->data && 0 <= row && row < model->data_count) {
        return e_contact_duplicate (model->data[row]);
    }
    return NULL;
}

static void
eab_model_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
    EABModel *model;
    gboolean need_get_book_view = FALSE;

    model = EAB_MODEL (object);
    
    switch (prop_id){
    case PROP_BOOK:
        if (model->book) {
            if (model->writable_status_id)
                g_signal_handler_disconnect (model->book,
                                 model->writable_status_id);
            model->writable_status_id = 0;

            if (model->backend_died_id)
                g_signal_handler_disconnect (model->book,
                                 model->backend_died_id);
            model->backend_died_id = 0;

            g_object_unref (model->book);
        }
        model->book = E_BOOK(g_value_get_object (value));
        if (model->book) {
            model->writable_status_id =
                g_signal_connect (model->book,
                          "writable_status",
                          G_CALLBACK (writable_status), model);
            model->backend_died_id =
                g_signal_connect (model->book,
                          "backend_died",
                          G_CALLBACK (backend_died), model);

            if (!model->editable_set) {
                model->editable = e_book_is_writable (model->book);

                g_signal_emit (model,
                           eab_model_signals [WRITABLE_STATUS], 0,
                           model->editable);
            }

            model->first_get_view = TRUE;
            g_object_ref (model->book);
            need_get_book_view = TRUE;
        }
        break;
    case PROP_QUERY:
        if (model->query)
            e_book_query_unref (model->query);
        model->query = e_book_query_from_string (g_value_get_string (value));
        need_get_book_view = TRUE;
        break;
    case PROP_EDITABLE:
        model->editable = g_value_get_boolean (value);
        model->editable_set = TRUE;
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
        break;
    }

    if (need_get_book_view) {
        if (!model->book_view_idle_id) {
            g_object_ref (model);
            model->book_view_idle_id = g_idle_add ((GSourceFunc)get_view_idle, model);
        }
    }

}

static void
eab_model_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
    EABModel *eab_model;

    eab_model = EAB_MODEL (object);

    switch (prop_id) {
    case PROP_BOOK:
        g_value_set_object (value, eab_model->book);
        break;
    case PROP_QUERY: {
        char *query_string = e_book_query_to_string (eab_model->query);
        g_value_set_string (value, query_string);
        break;
    }
    case PROP_EDITABLE:
        g_value_set_boolean (value, eab_model->editable);
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
        break;
    }
}

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

    if (!type) {
        static const GTypeInfo info =  {
            sizeof (EABModelClass),
            NULL,           /* base_init */
            NULL,           /* base_finalize */
            (GClassInitFunc) eab_model_class_init,
            NULL,           /* class_finalize */
            NULL,           /* class_data */
            sizeof (EABModel),
            0,             /* n_preallocs */
            (GInstanceInitFunc) eab_model_init,
        };

        type = g_type_register_static (PARENT_TYPE, "EABModel", &info, 0);
    }

    return type;
}

EABModel*
eab_model_new (void)
{
    EABModel *et;

    et = g_object_new (EAB_TYPE_MODEL, NULL);
    
    return et;
}

void   eab_model_stop    (EABModel *model)
{
    remove_book_view(model);
    g_signal_emit (model,
               eab_model_signals [STOP_STATE_CHANGED], 0);
    g_signal_emit (model,
               eab_model_signals [STATUS_MESSAGE], 0,
               "Search Interrupted.");
}

gboolean
eab_model_can_stop (EABModel *model)
{
    return model->search_in_progress;
}

void
eab_model_force_folder_bar_message (EABModel *model)
{
    update_folder_bar_message (model);
}

int
eab_model_contact_count (EABModel *model)
{
    return model->data_count;
}

const EContact *
eab_model_contact_at (EABModel *model, int index)
{
    return model->data[index];
}

gboolean
eab_model_editable (EABModel *model)
{
    return model->editable;
}

EBook *
eab_model_get_ebook (EABModel *model)
{
    return model->book;
}