path: root/src/ephy-completion-model.c

/* 
 *  Copyright © 2002 Jorn Baayen <jorn@nl.linux.org>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 *  $Id$
 */

#include "config.h"

#include "ephy-completion-model.h"
#include "ephy-node.h"
#include "ephy-shell.h"
#include "ephy-history.h"

static void ephy_completion_model_class_init (EphyCompletionModelClass *klass);
static void ephy_completion_model_init (EphyCompletionModel *model);
static void ephy_completion_model_tree_model_init (GtkTreeModelIface *iface);

#define EPHY_COMPLETION_MODEL_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE ((object), EPHY_TYPE_COMPLETION_MODEL, EphyCompletionModelPrivate))

struct _EphyCompletionModelPrivate
{
    EphyNode *history;
    EphyNode *bookmarks;
    int stamp;
};

enum
{
    HISTORY_GROUP,
    BOOKMARKS_GROUP
};

static GObjectClass *parent_class = NULL;

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

    if (G_UNLIKELY (type == 0))
    {
        const GTypeInfo our_info =
        {
            sizeof (EphyCompletionModelClass),
            NULL,
            NULL,
            (GClassInitFunc) ephy_completion_model_class_init,
            NULL,
            NULL,
            sizeof (EphyCompletionModel),
            0,
            (GInstanceInitFunc) ephy_completion_model_init
        };

        const GInterfaceInfo tree_model_info =
        {
            (GInterfaceInitFunc) ephy_completion_model_tree_model_init,
            NULL,
            NULL
        };

        type = g_type_register_static (G_TYPE_OBJECT,
                           "EphyCompletionModel",
                           &our_info, 0);

        g_type_add_interface_static (type,
                         GTK_TYPE_TREE_MODEL,
                         &tree_model_info);
    }

    return type;
}

static void
ephy_completion_model_class_init (EphyCompletionModelClass *klass)
{
    GObjectClass *object_class = G_OBJECT_CLASS (klass);

    parent_class = g_type_class_peek_parent (klass);

    g_type_class_add_private (object_class, sizeof (EphyCompletionModelPrivate));
}

static GtkTreePath *
get_path_real (EphyCompletionModel *model,
           EphyNode *root,
           EphyNode *child)
{
    GtkTreePath *retval;
    int index;

    retval = gtk_tree_path_new ();
    index = ephy_node_get_child_index (root, child);

    if (root == model->priv->bookmarks)
    {
        index += ephy_node_get_n_children (model->priv->history);
    }

    gtk_tree_path_append_index (retval, index);

    return retval;
}

static void
node_iter_from_node (EphyCompletionModel *model,
             EphyNode *root,
             EphyNode *child,
             GtkTreeIter *iter)
{
    iter->stamp = model->priv->stamp;
    iter->user_data = child;
    iter->user_data2 = root;
}

static EphyNode *
get_index_root (EphyCompletionModel *model, int *index)
{
    int children;

    children = ephy_node_get_n_children (model->priv->history);

    if (*index >= children)
    {
        *index = *index - children;

        if (*index < ephy_node_get_n_children (model->priv->bookmarks))
        {
            return model->priv->bookmarks;
        }
        else
        {
            return NULL;
        }
    }
    else
    {
        return model->priv->history;
    }
}

static void
root_child_removed_cb (EphyNode *node,
               EphyNode *child,
               guint old_index,
               EphyCompletionModel *model)
{
    GtkTreePath *path;
    guint index;

    path = gtk_tree_path_new ();

    index = old_index;
    if (node == model->priv->bookmarks)
    {
        index += ephy_node_get_n_children (model->priv->history);
    }
    gtk_tree_path_append_index (path, index);

    gtk_tree_model_row_deleted (GTK_TREE_MODEL (model), path);
    gtk_tree_path_free (path);
}

static void
root_child_added_cb (EphyNode *node,
             EphyNode *child,
             EphyCompletionModel *model)
{
    GtkTreePath *path;
    GtkTreeIter iter;

    node_iter_from_node (model, node, child, &iter);

    path = get_path_real (model, node, child);
    gtk_tree_model_row_inserted (GTK_TREE_MODEL (model), path, &iter);
    gtk_tree_path_free (path);
}

static void
root_child_changed_cb (EphyNode *node,
               EphyNode *child,
               guint property_id,
               EphyCompletionModel *model)
{
    GtkTreePath *path;
    GtkTreeIter iter;

    node_iter_from_node (model, node, child, &iter);

    path = get_path_real (model, node, child);
    gtk_tree_model_row_changed (GTK_TREE_MODEL (model), path, &iter);
    gtk_tree_path_free (path);
}

static void
connect_signals (EphyCompletionModel *model, EphyNode *root)
{
    ephy_node_signal_connect_object (root,
                             EPHY_NODE_CHILD_ADDED,
                             (EphyNodeCallback)root_child_added_cb,
                             G_OBJECT (model));
    ephy_node_signal_connect_object (root,
                             EPHY_NODE_CHILD_REMOVED,
                             (EphyNodeCallback)root_child_removed_cb,
                             G_OBJECT (model));
    ephy_node_signal_connect_object (root,
                             EPHY_NODE_CHILD_CHANGED,
                             (EphyNodeCallback)root_child_changed_cb,
                             G_OBJECT (model));
}

static void
ephy_completion_model_init (EphyCompletionModel *model)
{
    EphyBookmarks *bookmarks;
    EphyHistory *history;

    model->priv = EPHY_COMPLETION_MODEL_GET_PRIVATE (model);
    model->priv->stamp = g_random_int ();

    history = EPHY_HISTORY (ephy_embed_shell_get_global_history (embed_shell));
    model->priv->history = ephy_history_get_pages (history);
    connect_signals (model, model->priv->history);

    bookmarks = ephy_shell_get_bookmarks (ephy_shell);
    model->priv->bookmarks = ephy_bookmarks_get_bookmarks (bookmarks);
    connect_signals (model, model->priv->bookmarks);
}

EphyCompletionModel *
ephy_completion_model_new (void)
{
    EphyCompletionModel *model;

    model = EPHY_COMPLETION_MODEL (g_object_new (EPHY_TYPE_COMPLETION_MODEL,
                            NULL));

    g_return_val_if_fail (model->priv != NULL, NULL);

    return model;
}

static int
ephy_completion_model_get_n_columns (GtkTreeModel *tree_model)
{
    return N_COL;
}

static GType
ephy_completion_model_get_column_type (GtkTreeModel *tree_model,
                           int index)
{
    GType type = 0;

    switch (index)
    {
        case EPHY_COMPLETION_TEXT_COL:
        case EPHY_COMPLETION_ACTION_COL:
        case EPHY_COMPLETION_KEYWORDS_COL:
        case EPHY_COMPLETION_EXTRA_COL:
            type =  G_TYPE_STRING;
            break;
        case EPHY_COMPLETION_RELEVANCE_COL:
            type = G_TYPE_INT;
            break;
    }

    return type;
}

static void
init_text_col (GValue *value, EphyNode *node, int group)
{
    const char *text;

    switch (group)
    {
        case BOOKMARKS_GROUP:
            text = ephy_node_get_property_string
                (node, EPHY_NODE_BMK_PROP_TITLE);
            break;
        case HISTORY_GROUP:
            text = ephy_node_get_property_string
                (node, EPHY_NODE_PAGE_PROP_LOCATION);
            break;

        default:
            text = "";
    }
    
    g_value_set_string (value, text);
}

static void
init_action_col (GValue *value, EphyNode *node, int group)
{
    const char *text;

    switch (group)
    {
        case BOOKMARKS_GROUP:
            text = ephy_node_get_property_string
                (node, EPHY_NODE_BMK_PROP_LOCATION);
            break;
        case HISTORY_GROUP:
            text = ephy_node_get_property_string
                (node, EPHY_NODE_PAGE_PROP_LOCATION);
            break;
        default:
            text = "";
    }
    
    g_value_set_string (value, text);
}

static void
init_keywords_col (GValue *value, EphyNode *node, int group)
{
    const char *text = NULL;

    switch (group)
    {
        case BOOKMARKS_GROUP:
            text = ephy_node_get_property_string
                (node, EPHY_NODE_BMK_PROP_KEYWORDS);
            break;
    }

    if (text == NULL)
    {
        text = "";
    }
    
    g_value_set_string (value, text);
}

static gboolean
is_base_address (const char *address)
{
    int slashes = 0;

    if (address == NULL) return FALSE;

    while (*address != '\0')
    {
        if (*address == '/') slashes++;

        address++;

        /* Base uris has 3 slashes like http://www.gnome.org/ */
        if (slashes == 3)
        {
            return (*address == '\0');
        }
    }

    return FALSE;
}

static void
init_relevance_col (GValue *value, EphyNode *node, int group)
{
    int relevance = 0;

    /* We have three ordered groups: history's base
       addresses, bookmarks, deep history addresses */

    if (group == BOOKMARKS_GROUP)
    {
        relevance = 1 << 5;
    }
    else if (group == HISTORY_GROUP)
    {
        const char *address;
        int visits;
    
        visits = ephy_node_get_property_int
            (node, EPHY_NODE_PAGE_PROP_VISITS);
        address = ephy_node_get_property_string
            (node, EPHY_NODE_PAGE_PROP_LOCATION);

        visits = MIN (visits, (1 << 5) - 1);

        if (is_base_address (address))
        {
            relevance = visits << 10;
        }
        else
        {
            relevance = visits;
        }
    }
    
    g_value_set_int (value, relevance);
}

static void
ephy_completion_model_get_value (GtkTreeModel *tree_model,
                     GtkTreeIter *iter,
                     int column,
                     GValue *value)
{
    int group;
    EphyCompletionModel *model = EPHY_COMPLETION_MODEL (tree_model);
    EphyNode *node;

    g_return_if_fail (EPHY_IS_COMPLETION_MODEL (tree_model));
    g_return_if_fail (iter != NULL);
    g_return_if_fail (iter->stamp == model->priv->stamp);

    node = iter->user_data;
    group = (iter->user_data2 == model->priv->history) ?
        HISTORY_GROUP : BOOKMARKS_GROUP;

    switch (column)
    {
        case EPHY_COMPLETION_EXTRA_COL:
            g_value_init (value, G_TYPE_STRING);
            /* We set an additional text for the item title only for history, since we assume that people know the url of their bookmarks */
            if (group == HISTORY_GROUP)
            {
                const char *text;
                text = ephy_node_get_property_string
                    (node, EPHY_NODE_PAGE_PROP_TITLE);
                g_value_set_string (value, text);
            }
            break;
        case EPHY_COMPLETION_TEXT_COL:
            g_value_init (value, G_TYPE_STRING);
            init_text_col (value, node, group);
            break;
        case EPHY_COMPLETION_ACTION_COL:
            g_value_init (value, G_TYPE_STRING);
            init_action_col (value, node, group);
            break;
        case EPHY_COMPLETION_KEYWORDS_COL:
            g_value_init (value, G_TYPE_STRING);
            init_keywords_col (value, node, group);
            break;
        case EPHY_COMPLETION_RELEVANCE_COL:
            g_value_init (value, G_TYPE_INT);
            init_relevance_col (value, node, group);
            break;
    }
}

static GtkTreeModelFlags
ephy_completion_model_get_flags (GtkTreeModel *tree_model)
{
    return GTK_TREE_MODEL_ITERS_PERSIST | GTK_TREE_MODEL_LIST_ONLY;
}

static gboolean
ephy_completion_model_get_iter (GtkTreeModel *tree_model,
                    GtkTreeIter *iter,
                    GtkTreePath *path)
{
    EphyCompletionModel *model = EPHY_COMPLETION_MODEL (tree_model);
    EphyNode *root, *child;
    int i;

    g_return_val_if_fail (EPHY_IS_COMPLETION_MODEL (model), FALSE);
    g_return_val_if_fail (gtk_tree_path_get_depth (path) > 0, FALSE);

    i = gtk_tree_path_get_indices (path)[0];

    root = get_index_root (model, &i);
    if (root == NULL) return FALSE;

    child = ephy_node_get_nth_child (root, i);
    g_return_val_if_fail (child != NULL, FALSE);

    node_iter_from_node (model, root, child, iter);

    return TRUE;
}

static GtkTreePath *
ephy_completion_model_get_path (GtkTreeModel *tree_model,
                    GtkTreeIter *iter)
{
    EphyCompletionModel *model = EPHY_COMPLETION_MODEL (tree_model);

    g_return_val_if_fail (iter != NULL, NULL);
    g_return_val_if_fail (iter->user_data != NULL, NULL);
    g_return_val_if_fail (iter->user_data2 != NULL, NULL);
    g_return_val_if_fail (iter->stamp == model->priv->stamp, NULL);

    return get_path_real (model, iter->user_data2, iter->user_data);
}

static gboolean
ephy_completion_model_iter_next (GtkTreeModel *tree_model,
                     GtkTreeIter *iter)
{
    EphyCompletionModel *model = EPHY_COMPLETION_MODEL (tree_model);
    EphyNode *node, *next, *root;

    g_return_val_if_fail (iter != NULL, FALSE);
    g_return_val_if_fail (iter->user_data != NULL, FALSE);
    g_return_val_if_fail (iter->user_data2 != NULL, FALSE);
    g_return_val_if_fail (iter->stamp == model->priv->stamp, FALSE);

    node = iter->user_data;
    root = iter->user_data2;

    next = ephy_node_get_next_child (root, node);

    if (next == NULL && root == model->priv->history)
    {
        root = model->priv->bookmarks;
        next = ephy_node_get_nth_child (model->priv->bookmarks, 0);
    }

    if (next == NULL) return FALSE;

    node_iter_from_node (model, root, next, iter);
    
    return TRUE;
}

static gboolean
ephy_completion_model_iter_children (GtkTreeModel *tree_model,
                         GtkTreeIter *iter,
                         GtkTreeIter *parent)
{
    EphyCompletionModel *model = EPHY_COMPLETION_MODEL (tree_model);
    EphyNode *root, *first_node;

    if (parent != NULL)
    {
        return FALSE;
    }

    root = model->priv->history;
    first_node = ephy_node_get_nth_child (root, 0);

    if (first_node == NULL)
    {
        root = model->priv->bookmarks;
        first_node = ephy_node_get_nth_child (root, 0);
    }

    if (first_node == NULL)
    {
        return FALSE;
    }

    node_iter_from_node (model, root, first_node, iter);

    return TRUE;
}

static gboolean
ephy_completion_model_iter_has_child (GtkTreeModel *tree_model,
                         GtkTreeIter *iter)
{
    return FALSE;
}

static int
ephy_completion_model_iter_n_children (GtkTreeModel *tree_model,
                           GtkTreeIter *iter)
{
    EphyCompletionModel *model = EPHY_COMPLETION_MODEL (tree_model);

    g_return_val_if_fail (EPHY_IS_COMPLETION_MODEL (tree_model), -1);

    if (iter == NULL)
    {
        return ephy_node_get_n_children (model->priv->history) +
               ephy_node_get_n_children (model->priv->bookmarks);
    }

    g_return_val_if_fail (model->priv->stamp == iter->stamp, -1);

    return 0;
}

static gboolean
ephy_completion_model_iter_nth_child (GtkTreeModel *tree_model,
                          GtkTreeIter *iter,
                          GtkTreeIter *parent,
                          int n)
{
    EphyCompletionModel *model = EPHY_COMPLETION_MODEL (tree_model);
    EphyNode *node, *root;

    g_return_val_if_fail (EPHY_IS_COMPLETION_MODEL (tree_model), FALSE);

    if (parent != NULL)
    {
        return FALSE;
    }

    root = get_index_root (model, &n);
    node = ephy_node_get_nth_child (root, n);

    if (node == NULL) return FALSE;

    node_iter_from_node (model, root, node, iter);

    return TRUE;
}

static gboolean
ephy_completion_model_iter_parent (GtkTreeModel *tree_model,
                       GtkTreeIter *iter,
                       GtkTreeIter *child)
{
    return FALSE;
}

static void
ephy_completion_model_tree_model_init (GtkTreeModelIface *iface)
{
    iface->get_flags       = ephy_completion_model_get_flags;
    iface->get_iter        = ephy_completion_model_get_iter;
    iface->get_path        = ephy_completion_model_get_path;
    iface->iter_next       = ephy_completion_model_iter_next;
    iface->iter_children   = ephy_completion_model_iter_children;
    iface->iter_has_child  = ephy_completion_model_iter_has_child;
    iface->iter_n_children = ephy_completion_model_iter_n_children;
    iface->iter_nth_child  = ephy_completion_model_iter_nth_child;
    iface->iter_parent     = ephy_completion_model_iter_parent;
    iface->get_n_columns   = ephy_completion_model_get_n_columns;
    iface->get_column_type = ephy_completion_model_get_column_type;
    iface->get_value       = ephy_completion_model_get_value;
}