/*
 * This file Copyright (C) Mnemosyne LLC
 *
 * This file is licensed by the GPL version 2. Works owned by the
 * Transmission project are granted a special exemption to clause 2 (b)
 * so that the bulk of its code can remain under the MIT license.
 * This exemption does not extend to derived works not owned by
 * the Transmission project.
 *
 * $Id: file-list.c 14018 2013-02-14 15:17:42Z jordan $
 */

#include <stddef.h>
#include <stdio.h>
#include <string.h>
#include <glib/gi18n.h>
#include <gtk/gtk.h>

#include <libtransmission/transmission.h>
#include <libtransmission/utils.h>

#include "file-list.h"
#include "hig.h"
#include "icons.h"
#include "tr-prefs.h"
#include "util.h"

#define TR_DOWNLOAD_KEY  "tr-download-key"
#define TR_COLUMN_ID_KEY "tr-model-column-id-key"
#define TR_PRIORITY_KEY  "tr-priority-key"

enum
{
    /* these two fields could be any number at all so long as they're not
     * TR_PRI_LOW, TR_PRI_NORMAL, TR_PRI_HIGH, TRUE, or FALSE */
    NOT_SET = 1000,
    MIXED = 1001
};

enum
{
    FC_ICON,
    FC_LABEL,
    FC_LABEL_ESC,
    FC_PROG,
    FC_INDEX,
    FC_SIZE,
    FC_SIZE_STR,
    FC_HAVE,
    FC_PRIORITY,
    FC_ENABLED,
    N_FILE_COLS
};

typedef struct
{
    TrCore        * core;
    GtkWidget     * top;
    GtkWidget     * view;
    GtkTreeModel  * model; /* same object as store, but recast */
    GtkTreeStore  * store; /* same object as model, but recast */
    int             torrentId;
    guint           timeout_tag;
}
FileData;

static void
clearData (FileData * data)
{
    data->torrentId = -1;

    if (data->timeout_tag) {
        g_source_remove (data->timeout_tag);
        data->timeout_tag = 0;
    }
}

static void
freeData (gpointer data)
{
    clearData (data);
    g_free (data);
}

/***
****
***/

struct RefreshData
{
    int sort_column_id;
    gboolean resort_needed;

    tr_file_stat  * refresh_file_stat;
    tr_torrent * tor;

    FileData * file_data;
};

static gboolean
refreshFilesForeach (GtkTreeModel * model,
                     GtkTreePath  * path UNUSED,
                     GtkTreeIter  * iter,
                     gpointer       gdata)
{
    struct RefreshData * refresh_data = gdata;
    FileData * data = refresh_data->file_data;
    unsigned int index;
    uint64_t size;
    uint64_t old_have;
    int old_prog;
    int old_priority;
    int old_enabled;
    const gboolean is_file = !gtk_tree_model_iter_has_child (model, iter);

    gtk_tree_model_get (model, iter, FC_ENABLED, &old_enabled,
                                     FC_PRIORITY, &old_priority,
                                     FC_INDEX, &index,
                                     FC_HAVE, &old_have,
                                     FC_SIZE, &size,
                                     FC_PROG, &old_prog,
                                     -1);

    if (is_file)
    {
        tr_torrent * tor = refresh_data->tor;
        const tr_info * inf = tr_torrentInfo (tor);
        const int enabled = !inf->files[index].dnd;
        const int priority = inf->files[index].priority;
        const uint64_t have = refresh_data->refresh_file_stat[index].bytesCompleted;
        const int prog = size ? (int)((100.0*have)/size) : 1;

        if ((priority!=old_priority) || (enabled!=old_enabled) || (have!=old_have) || (prog!=old_prog))
        {
            /* Changing a value in the sort column can trigger a resort
             * which breaks this foreach () call. (See #3529)
             * As a workaround: if that's about to happen, temporarily disable
             * sorting until we finish walking the tree. */
            if (!refresh_data->resort_needed)
            {
                if ((refresh_data->resort_needed =
                  ((refresh_data->sort_column_id==FC_PRIORITY) && (priority!=old_priority)) ||
                  ((refresh_data->sort_column_id==FC_ENABLED) && (enabled!=old_enabled))))
                {
                    refresh_data->resort_needed = TRUE;
                    gtk_tree_sortable_set_sort_column_id (GTK_TREE_SORTABLE (data->model),
                                                          GTK_TREE_SORTABLE_UNSORTED_SORT_COLUMN_ID,
                                                          GTK_SORT_ASCENDING);
                }
            }

            gtk_tree_store_set (data->store, iter, FC_PRIORITY, priority,
                                                   FC_ENABLED, enabled,
                                                   FC_HAVE, have,
                                                   FC_PROG, prog,
                                                   -1);
        }
    }
    else
    {
        GtkTreeIter child;
        uint64_t sub_size = 0;
        uint64_t have = 0;
        int prog;
        int enabled = NOT_SET;
        int priority = NOT_SET;

        /* since gtk_tree_model_foreach () is depth-first, we can
         * get the `sub' info by walking the immediate children */

        if (gtk_tree_model_iter_children (model, &child, iter)) do
        {
            int child_enabled;
            int child_priority;
            int64_t child_have, child_size;

            gtk_tree_model_get (model, &child, FC_SIZE, &child_size,
                                               FC_HAVE, &child_have,
                                               FC_PRIORITY, &child_priority,
                                               FC_ENABLED, &child_enabled,
                                               -1);

            if ((child_enabled != FALSE) && (child_enabled != NOT_SET))
            {
              sub_size += child_size;
              have += child_have;
            }

            if (enabled == NOT_SET)
                enabled = child_enabled;
            else if (enabled != child_enabled)
                enabled = MIXED;

            if (priority == NOT_SET)
                priority = child_priority;
            else if (priority != child_priority)
                priority = MIXED;
        }
        while (gtk_tree_model_iter_next (model, &child));

        prog = sub_size ? (int)((100.0*have)/sub_size) : 1;

        if ((size!=sub_size) || (have!=old_have)
                             || (priority!=old_priority)
                             || (enabled!=old_enabled)
                             || (prog!=old_prog))
        {
            char size_str[64];
            tr_strlsize (size_str, sub_size, sizeof size_str);
            gtk_tree_store_set (data->store, iter, FC_SIZE, sub_size,
                                                   FC_SIZE_STR, size_str,
                                                   FC_HAVE, have,
                                                   FC_PRIORITY, priority,
                                                   FC_ENABLED, enabled,
                                                   FC_PROG, prog,
                                                   -1);
        }
    }

    return FALSE; /* keep walking */
}

static void
gtr_tree_model_foreach_postorder_subtree (GtkTreeModel            * model,
                                          GtkTreeIter             * parent,
                                          GtkTreeModelForeachFunc   func,
                                          gpointer                  data)
{
    GtkTreeIter child;
    if (gtk_tree_model_iter_children (model, &child, parent)) do
        gtr_tree_model_foreach_postorder_subtree (model, &child, func, data);
    while (gtk_tree_model_iter_next (model, &child));
    if (parent)
        func (model, NULL, parent, data);
}

static void
gtr_tree_model_foreach_postorder (GtkTreeModel            * model,
                                  GtkTreeModelForeachFunc   func,
                                  gpointer                  data)
{
    GtkTreeIter iter;
    if (gtk_tree_model_iter_nth_child (model, &iter, NULL, 0)) do
        gtr_tree_model_foreach_postorder_subtree (model, &iter, func, data);
    while (gtk_tree_model_iter_next (model, &iter));
}

static void
refresh (FileData * data)
{
    tr_torrent * tor = gtr_core_find_torrent (data->core, data->torrentId);

    if (tor == NULL)
    {
        gtr_file_list_clear (data->top);
    }
    else
    {
        GtkSortType order;
        int sort_column_id;
        tr_file_index_t fileCount;
        struct RefreshData refresh_data;
        GtkTreeSortable * sortable = GTK_TREE_SORTABLE (data->model);
        gtk_tree_sortable_get_sort_column_id (sortable, &sort_column_id, &order);

        refresh_data.sort_column_id = sort_column_id;
        refresh_data.resort_needed = FALSE;
        refresh_data.refresh_file_stat = tr_torrentFiles (tor, &fileCount);
        refresh_data.tor = tor;
        refresh_data.file_data = data;

        gtr_tree_model_foreach_postorder (data->model, refreshFilesForeach, &refresh_data);

        if (refresh_data.resort_needed)
            gtk_tree_sortable_set_sort_column_id (sortable, sort_column_id, order);

        tr_torrentFilesFree (refresh_data.refresh_file_stat, fileCount);
    }
}

static gboolean
refreshModel (gpointer file_data)
{
    refresh (file_data);

    return G_SOURCE_CONTINUE;
}

/***
****
***/

struct ActiveData
{
    GtkTreeSelection  * sel;
    GArray            * array;
};

static gboolean
getSelectedFilesForeach (GtkTreeModel * model,
                         GtkTreePath  * path UNUSED,
                         GtkTreeIter  * iter,
                         gpointer       gdata)
{
    const gboolean is_file = !gtk_tree_model_iter_has_child (model, iter);

    if (is_file)
    {
        struct ActiveData * data = gdata;

        /* active means: if it's selected or any ancestor is selected */

        gboolean is_active = gtk_tree_selection_iter_is_selected (data->sel, iter);

        if (!is_active)
        {
            GtkTreeIter walk = *iter;
            GtkTreeIter parent;
            while (!is_active && gtk_tree_model_iter_parent (model, &parent, &walk))
            {
                is_active = gtk_tree_selection_iter_is_selected (data->sel, &parent);
                walk = parent;
            }
        }

        if (is_active)
        {
            unsigned int i;
            gtk_tree_model_get (model, iter, FC_INDEX, &i, -1);
            g_array_append_val (data->array, i);
        }
    }

    return FALSE; /* keep walking */
}

static GArray*
getSelectedFilesAndDescendants (GtkTreeView * view)
{
    struct ActiveData data;

    data.sel = gtk_tree_view_get_selection (view);
    data.array = g_array_new (FALSE, FALSE, sizeof (tr_file_index_t));
    gtk_tree_model_foreach (gtk_tree_view_get_model (view),
                            getSelectedFilesForeach, &data);
    return data.array;
}

struct SubtreeForeachData
{
    GArray       * array;
    GtkTreePath  * path;
};

static gboolean
getSubtreeForeach (GtkTreeModel   * model,
                   GtkTreePath    * path,
                   GtkTreeIter    * iter,
                   gpointer         gdata)
{
    const gboolean is_file = !gtk_tree_model_iter_has_child (model, iter);

    if (is_file)
    {
        struct SubtreeForeachData * data = gdata;

        if (!gtk_tree_path_compare (path, data->path) || gtk_tree_path_is_descendant (path, data->path))
        {
            unsigned int i;
            gtk_tree_model_get (model, iter, FC_INDEX, &i, -1);
            g_array_append_val (data->array, i);
        }
    }

    return FALSE; /* keep walking */
}

static void
getSubtree (GtkTreeView * view, GtkTreePath * path, GArray * indices)
{
    struct SubtreeForeachData tmp;
    tmp.array = indices;
    tmp.path = path;
    gtk_tree_model_foreach (gtk_tree_view_get_model (view), getSubtreeForeach, &tmp);
}

/* if `path' is a selected row, all selected rows are returned.
 * otherwise, only the row indicated by `path' is returned.
 * this is for toggling all the selected rows' states in a batch.
 */
static GArray*
getActiveFilesForPath (GtkTreeView * view, GtkTreePath * path)
{
    GArray * indices;
    GtkTreeSelection * sel = gtk_tree_view_get_selection (view);

    if (gtk_tree_selection_path_is_selected (sel, path))
    {
        /* clicked in a selected row... use the current selection */
        indices = getSelectedFilesAndDescendants (view);
    }
    else
    {
        /* clicked OUTSIDE of the selected row... just use the clicked row */
        indices = g_array_new (FALSE, FALSE, sizeof (tr_file_index_t));
        getSubtree (view, path, indices);
    }

    return indices;
}

/***
****
***/

void
gtr_file_list_clear (GtkWidget * w)
{
    gtr_file_list_set_torrent (w, -1);
}

struct build_data
{
    GtkWidget    * w;
    tr_torrent   * tor;
    GtkTreeIter  * iter;
    GtkTreeStore * store;
};

struct row_struct
{
    uint64_t    length;
    char      * name;
    int         index;
};

static void
buildTree (GNode * node, gpointer gdata)
{
    char size_str[64];
    GtkTreeIter child_iter;
    struct build_data * build = gdata;
    struct row_struct *child_data = node->data;
    const gboolean isLeaf = node->children == NULL;

    const char * mime_type = isLeaf ? gtr_get_mime_type_from_filename (child_data->name) : DIRECTORY_MIME_TYPE;
    GdkPixbuf * icon = gtr_get_mime_type_icon (mime_type, GTK_ICON_SIZE_MENU, build->w);
    const tr_info * inf = tr_torrentInfo (build->tor);
    const int priority = isLeaf ? inf->files[ child_data->index ].priority : 0;
    const gboolean enabled = isLeaf ? !inf->files[ child_data->index ].dnd : TRUE;
    char * name_esc = g_markup_escape_text (child_data->name, -1);

    tr_strlsize (size_str, child_data->length, sizeof size_str);

    gtk_tree_store_insert_with_values (build->store, &child_iter, build->iter, INT_MAX,
                                       FC_INDEX, child_data->index,
                                       FC_LABEL, child_data->name,
                                       FC_LABEL_ESC, name_esc,
                                       FC_SIZE, child_data->length,
                                       FC_SIZE_STR, size_str,
                                       FC_ICON, icon,
                                       FC_PRIORITY, priority,
                                       FC_ENABLED, enabled,
                                       -1);

    if (!isLeaf)
    {
        struct build_data b = *build;
        b.iter = &child_iter;
        g_node_children_foreach (node, G_TRAVERSE_ALL, buildTree, &b);
    }

    g_free (name_esc);
    g_object_unref (icon);

    /* we're done with this node */
    g_free (child_data->name);
    g_free (child_data);
}

static GNode*
find_child (GNode* parent, const char * name)
{
    GNode * child = parent->children;
    while (child) {
        const struct row_struct * child_data = child->data;
        if ((*child_data->name == *name) && !g_strcmp0 (child_data->name, name))
            break;
        child = child->next;
    }
    return child;
}

void
gtr_file_list_set_torrent (GtkWidget * w, int torrentId)
{
    GtkTreeStore * store;
    FileData * data = g_object_get_data (G_OBJECT (w), "file-data");

    /* unset the old fields */
    clearData (data);

    /* instantiate the model */
    store = gtk_tree_store_new (N_FILE_COLS,
                                 GDK_TYPE_PIXBUF,  /* icon */
                                 G_TYPE_STRING,    /* label */
                                 G_TYPE_STRING,    /* label esc */
                                 G_TYPE_INT,       /* prog [0..100] */
                                 G_TYPE_UINT,      /* index */
                                 G_TYPE_UINT64,    /* size */
                                 G_TYPE_STRING,    /* size str */
                                 G_TYPE_UINT64,    /* have */
                                 G_TYPE_INT,       /* priority */
                                 G_TYPE_INT);     /* dl enabled */

    data->store = store;
    data->model = GTK_TREE_MODEL (store);
    data->torrentId = torrentId;

    /* populate the model */
    if (torrentId > 0)
    {
        tr_torrent * tor = gtr_core_find_torrent (data->core, torrentId);
        if (tor != NULL)
        {
            tr_file_index_t i;
            const tr_info * inf = tr_torrentInfo (tor);
            struct row_struct * root_data;
            GNode * root;
            struct build_data build;

            /* build a GNode tree of the files */
            root_data = g_new0 (struct row_struct, 1);
            root_data->name = g_strdup (tr_torrentName (tor));
            root_data->index = -1;
            root_data->length = 0;
            root = g_node_new (root_data);
            for (i=0; i<inf->fileCount; ++i) {
                int j;
                GNode * parent = root;
                const tr_file * file = &inf->files[i];
                char ** tokens = g_strsplit (file->name, G_DIR_SEPARATOR_S, 0);
                for (j=0; tokens[j]; ++j) {
                    const gboolean isLeaf = tokens[j+1] == NULL;
                    const char * name = tokens[j];
                    GNode * node = find_child (parent, name);
                    if (node == NULL) {
                        struct row_struct * row = g_new (struct row_struct, 1);
                        row->name = g_strdup (name);
                        row->index = isLeaf ? (int)i : -1;
                        row->length = isLeaf ? file->length : 0;
                        node = g_node_new (row);
                        g_node_append (parent, node);
                    }
                    parent = node;
                }
                g_strfreev (tokens);
            }

            /* now, add them to the model */
            build.w = w;
            build.tor = tor;
            build.store = data->store;
            build.iter = NULL;
            g_node_children_foreach (root, G_TRAVERSE_ALL, buildTree, &build);

            /* cleanup */
            g_node_destroy (root);
            g_free (root_data->name);
            g_free (root_data);
        }

        refresh (data);
        data->timeout_tag = gdk_threads_add_timeout_seconds (SECONDARY_WINDOW_REFRESH_INTERVAL_SECONDS, refreshModel, data);
    }

    gtk_tree_view_set_model (GTK_TREE_VIEW (data->view), data->model);
    gtk_tree_view_expand_all (GTK_TREE_VIEW (data->view));
    g_object_unref (data->model);
}

/***
****
***/

static void
renderDownload (GtkTreeViewColumn  * column UNUSED,
                GtkCellRenderer    * renderer,
                GtkTreeModel       * model,
                GtkTreeIter        * iter,
                gpointer             data   UNUSED)
{
    gboolean enabled;
    gtk_tree_model_get (model, iter, FC_ENABLED, &enabled, -1);
    g_object_set (renderer, "inconsistent", (enabled==MIXED),
                            "active", (enabled==TRUE),
                            NULL);
}

static void
renderPriority (GtkTreeViewColumn  * column UNUSED,
                GtkCellRenderer    * renderer,
                GtkTreeModel       * model,
                GtkTreeIter        * iter,
                gpointer             data   UNUSED)
{
    int priority;
    const char * text;
    gtk_tree_model_get (model, iter, FC_PRIORITY, &priority, -1);
    switch (priority) {
        case TR_PRI_HIGH:   text = _("High"); break;
        case TR_PRI_NORMAL: text = _("Normal"); break;
        case TR_PRI_LOW:    text = _("Low"); break;
        default:            text = _("Mixed"); break;
    }
    g_object_set (renderer, "text", text, NULL);
}

/* build a filename from tr_torrentGetCurrentDir () + the model's FC_LABELs */
static char*
buildFilename (tr_torrent * tor, GtkTreeModel * model,
               GtkTreePath * path, GtkTreeIter * iter)
{
    char * ret;
    GtkTreeIter child;
    GtkTreeIter parent = *iter;
    int n = gtk_tree_path_get_depth (path);
    char ** tokens = g_new0 (char*, n + 2);
    tokens[0] = g_strdup (tr_torrentGetCurrentDir (tor));
    do {
        child = parent;
        gtk_tree_model_get (model, &child, FC_LABEL, &tokens[n--], -1);
    } while (gtk_tree_model_iter_parent (model, &parent, &child));
    ret = g_build_filenamev (tokens);
    g_strfreev (tokens);
    return ret;
}

static gboolean
onRowActivated (GtkTreeView * view, GtkTreePath * path,
                GtkTreeViewColumn * col UNUSED, gpointer gdata)
{
    gboolean handled = FALSE;
    FileData * data = gdata;
    tr_torrent * tor = gtr_core_find_torrent (data->core, data->torrentId);

    if (tor != NULL)
    {
        GtkTreeIter iter;
        GtkTreeModel * model = gtk_tree_view_get_model (view);

        if (gtk_tree_model_get_iter (model, &iter, path))
        {
            int prog;
            char * filename = buildFilename (tor, model, path, &iter);
            gtk_tree_model_get (model, &iter, FC_PROG, &prog, -1);

            /* if the file's not done, walk up the directory tree until we find
             * an ancestor that exists, and open that instead */
            if (filename && (prog<100 || !g_file_test (filename, G_FILE_TEST_EXISTS))) do
            {
                char * tmp = g_path_get_dirname (filename);
                g_free (filename);
                filename = tmp;
            }
            while (filename && *filename && !g_file_test (filename, G_FILE_TEST_EXISTS));

            if ((handled = filename && *filename))
                gtr_open_file (filename);
        }
    }

    return handled;
}

static gboolean
onViewPathToggled (GtkTreeView       * view,
                   GtkTreeViewColumn * col,
                   GtkTreePath       * path,
                   FileData          * data)
{
    int cid;
    tr_torrent * tor;
    gboolean handled = FALSE;

    if (!col || !path)
        return FALSE;

    cid = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (col), TR_COLUMN_ID_KEY));
    tor = gtr_core_find_torrent (data->core, data->torrentId);
    if ((tor != NULL) && ((cid == FC_PRIORITY) || (cid == FC_ENABLED)))
    {
        GtkTreeIter iter;
        GArray * indices = getActiveFilesForPath (view, path);
        GtkTreeModel * model = data->model;

        gtk_tree_model_get_iter (model, &iter, path);

        if (cid == FC_PRIORITY)
        {
            int priority;
            gtk_tree_model_get (model, &iter, FC_PRIORITY, &priority, -1);
            switch (priority) {
                case TR_PRI_NORMAL: priority = TR_PRI_HIGH; break;
                case TR_PRI_HIGH:   priority = TR_PRI_LOW; break;
                default:            priority = TR_PRI_NORMAL; break;
            }
            tr_torrentSetFilePriorities (tor,
                                       (tr_file_index_t *) indices->data,
                                       (tr_file_index_t) indices->len,
                                         priority);
        }
        else
        {
            int enabled;
            gtk_tree_model_get (model, &iter, FC_ENABLED, &enabled, -1);
            enabled = !enabled;

            tr_torrentSetFileDLs (tor,
                                (tr_file_index_t *) indices->data,
                                (tr_file_index_t) indices->len,
                                  enabled);
        }

        refresh (data);
        g_array_free (indices, TRUE);
        handled = TRUE;
    }

    return handled;
}

/**
 * @note 'col' and 'path' are assumed not to be NULL.
 */
static gboolean
getAndSelectEventPath (GtkTreeView        * treeview,
                       GdkEventButton     * event,
                       GtkTreeViewColumn ** col,
                       GtkTreePath       ** path)
{
    GtkTreeSelection * sel;

    if (gtk_tree_view_get_path_at_pos (treeview,
                                       event->x, event->y,
                                       path, col, NULL, NULL))
    {
        sel = gtk_tree_view_get_selection (treeview);
        if (!gtk_tree_selection_path_is_selected (sel, *path))
        {
            gtk_tree_selection_unselect_all (sel);
            gtk_tree_selection_select_path (sel, *path);
        }
        return TRUE;
    }

    return FALSE;
}

static gboolean
onViewButtonPressed (GtkWidget * w, GdkEventButton * event, gpointer gdata)
{
    GtkTreeViewColumn * col;
    GtkTreePath * path = NULL;
    gboolean handled = FALSE;
    GtkTreeView * treeview = GTK_TREE_VIEW (w);
    FileData * data = gdata;

    if ((event->type == GDK_BUTTON_PRESS)
         && (event->button == 1)
         && ! (event->state & (GDK_SHIFT_MASK | GDK_CONTROL_MASK))
         && getAndSelectEventPath (treeview, event, &col, &path))
    {
        handled = onViewPathToggled (treeview, col, path, data);

        if (path != NULL)
            gtk_tree_path_free (path);
    }

    return handled;
}

struct rename_data
{
  int error;
  char * newname;
  char * path_string;
  FileData * file_data;
};

static int
on_rename_done_idle (struct rename_data * data)
{
  if (data->error == 0)
    {
      GtkTreeIter iter;

      if (gtk_tree_model_get_iter_from_string (data->file_data->model, &iter, data->path_string))
        gtk_tree_store_set (data->file_data->store, &iter, FC_LABEL, data->newname, -1);
    }
  else
    {
      GtkWidget * w = gtk_message_dialog_new (
        GTK_WINDOW (gtk_widget_get_toplevel(data->file_data->top)),
        GTK_DIALOG_MODAL,
        GTK_MESSAGE_ERROR,
        GTK_BUTTONS_CLOSE,
        _("Unable to rename file as \"%s\": %s"),
        data->newname,
        tr_strerror(data->error));
      gtk_message_dialog_format_secondary_text (
        GTK_MESSAGE_DIALOG (w), "%s",
        _("Please correct the errors and try again."));
      gtk_dialog_run (GTK_DIALOG (w));
      gtk_widget_destroy (w);
    }

  /* cleanup */
  g_free (data->path_string);
  g_free (data->newname);
  g_free (data);
  return G_SOURCE_REMOVE;
}

static void
on_rename_done (tr_torrent          * tor          G_GNUC_UNUSED,
                const char          * oldpath      G_GNUC_UNUSED,
                const char          * newname      G_GNUC_UNUSED,
                int                   error,
                struct rename_data  * rename_data)
{
  rename_data->error = error;
  gdk_threads_add_idle ((GSourceFunc)on_rename_done_idle, rename_data);
}

static void
cell_edited_callback (GtkCellRendererText * cell G_GNUC_UNUSED,
                      gchar               * path_string,
                      gchar               * newname,
                      FileData            * data)
{
  tr_torrent * tor;
  GString * oldpath;
  GtkTreeIter iter;
  struct rename_data * rename_data;

  tor = gtr_core_find_torrent (data->core, data->torrentId);
  if (tor == NULL)
    return;
  if (!gtk_tree_model_get_iter_from_string (data->model, &iter, path_string))
    return;

  /* build oldpath */
  oldpath = g_string_new (NULL);
  for (;;)
    {
      char * token = NULL;
      GtkTreeIter child;
      gtk_tree_model_get (data->model, &iter, FC_LABEL, &token, -1);
      g_string_prepend (oldpath, token);
      g_free (token);

      child = iter;
      if (!gtk_tree_model_iter_parent (data->model, &iter, &child))
        break;

      g_string_prepend_c (oldpath, G_DIR_SEPARATOR);
    }

  /* do the renaming */
  rename_data = g_new0 (struct rename_data, 1);
  rename_data->newname = g_strdup (newname);
  rename_data->file_data = data;
  rename_data->path_string = g_strdup (path_string);
  tr_torrentRenamePath (tor, oldpath->str, newname, (tr_torrent_rename_done_func*)on_rename_done, rename_data);

  /* cleanup */
  g_string_free (oldpath, TRUE);
}


GtkWidget *
gtr_file_list_new (TrCore * core, int torrentId)
{
    int size;
    int width;
    GtkWidget * ret;
    GtkWidget * view;
    GtkWidget * scroll;
    GtkCellRenderer * rend;
    GtkTreeSelection * sel;
    GtkTreeViewColumn * col;
    GtkTreeView * tree_view;
    const char * title;
    PangoLayout * pango_layout;
    PangoContext * pango_context;
    PangoFontDescription * pango_font_description;
    FileData * data = g_new0 (FileData, 1);

    data->core = core;

    /* create the view */
    view = gtk_tree_view_new ();
    tree_view = GTK_TREE_VIEW (view);
    gtk_tree_view_set_rules_hint (tree_view, TRUE);
    gtk_container_set_border_width (GTK_CONTAINER (view), GUI_PAD_BIG);
    g_signal_connect (view, "button-press-event",
                      G_CALLBACK (onViewButtonPressed), data);
    g_signal_connect (view, "row_activated",
                      G_CALLBACK (onRowActivated), data);
    g_signal_connect (view, "button-release-event",
                      G_CALLBACK (on_tree_view_button_released), NULL);


    pango_context = gtk_widget_create_pango_context (view);
    pango_font_description = pango_font_description_copy (pango_context_get_font_description (pango_context));
    size = pango_font_description_get_size (pango_font_description);
    pango_font_description_set_size (pango_font_description, size * 0.8);
    g_object_unref (G_OBJECT (pango_context));

    /* set up view */
    sel = gtk_tree_view_get_selection (tree_view);
    gtk_tree_selection_set_mode (sel, GTK_SELECTION_MULTIPLE);
    gtk_tree_view_expand_all (tree_view);
    gtk_tree_view_set_search_column (tree_view, FC_LABEL);

    /* add file column */
    col = GTK_TREE_VIEW_COLUMN (g_object_new (GTK_TYPE_TREE_VIEW_COLUMN,
                                                "expand", TRUE,
                                                "title", _("Name"),
                                                NULL));
    gtk_tree_view_column_set_resizable (col, TRUE);
    rend = gtk_cell_renderer_pixbuf_new ();
    gtk_tree_view_column_pack_start (col, rend, FALSE);
    gtk_tree_view_column_add_attribute (col, rend, "pixbuf", FC_ICON);
    /* add text renderer */
    rend = gtk_cell_renderer_text_new ();
    g_object_set (rend, "editable", TRUE, NULL);
    g_object_set (rend, "ellipsize", PANGO_ELLIPSIZE_END, "font-desc", pango_font_description, NULL);
    g_signal_connect (rend, "edited", (GCallback)cell_edited_callback, data);
    gtk_tree_view_column_pack_start (col, rend, TRUE);
    gtk_tree_view_column_set_attributes (col, rend, "text", FC_LABEL, NULL);
    gtk_tree_view_column_set_sort_column_id (col, FC_LABEL);
    gtk_tree_view_append_column (tree_view, col);

    /* add "size" column */
    title = _("Size");
    rend = gtk_cell_renderer_text_new ();
    g_object_set (rend, "alignment", PANGO_ALIGN_RIGHT,
                        "font-desc", pango_font_description,
                        "xpad", GUI_PAD,
                        "xalign", 1.0f,
                        "yalign", 0.5f,
                        NULL);
    col = gtk_tree_view_column_new_with_attributes (title, rend, NULL);
    gtk_tree_view_column_set_sizing (col, GTK_TREE_VIEW_COLUMN_GROW_ONLY);
    gtk_tree_view_column_set_sort_column_id (col, FC_SIZE);
    gtk_tree_view_column_set_attributes (col, rend, "text", FC_SIZE_STR, NULL);
    gtk_tree_view_append_column (tree_view, col);

    /* add "progress" column */
    title = _("Have");
    pango_layout = gtk_widget_create_pango_layout (view, title);
    pango_layout_get_pixel_size (pango_layout, &width, NULL);
    width += 30; /* room for the sort indicator */
    g_object_unref (G_OBJECT (pango_layout));
    rend = gtk_cell_renderer_progress_new ();
    col = gtk_tree_view_column_new_with_attributes (title, rend, "value", FC_PROG, NULL);
    gtk_tree_view_column_set_fixed_width (col, width);
    gtk_tree_view_column_set_sizing (col, GTK_TREE_VIEW_COLUMN_FIXED);
    gtk_tree_view_column_set_sort_column_id (col, FC_PROG);
    gtk_tree_view_append_column (tree_view, col);

    /* add "enabled" column */
    title = _("Download");
    pango_layout = gtk_widget_create_pango_layout (view, title);
    pango_layout_get_pixel_size (pango_layout, &width, NULL);
    width += 30; /* room for the sort indicator */
    g_object_unref (G_OBJECT (pango_layout));
    rend = gtk_cell_renderer_toggle_new ();
    col = gtk_tree_view_column_new_with_attributes (title, rend, NULL);
    g_object_set_data (G_OBJECT (col), TR_COLUMN_ID_KEY,
                       GINT_TO_POINTER (FC_ENABLED));
    gtk_tree_view_column_set_fixed_width (col, width);
    gtk_tree_view_column_set_sizing (col, GTK_TREE_VIEW_COLUMN_FIXED);
    gtk_tree_view_column_set_cell_data_func (col, rend, renderDownload, NULL, NULL);
    gtk_tree_view_column_set_sort_column_id (col, FC_ENABLED);
    gtk_tree_view_append_column (tree_view, col);

    /* add priority column */
    title = _("Priority");
    pango_layout = gtk_widget_create_pango_layout (view, title);
    pango_layout_get_pixel_size (pango_layout, &width, NULL);
    width += 30; /* room for the sort indicator */
    g_object_unref (G_OBJECT (pango_layout));
    rend = gtk_cell_renderer_text_new ();
    g_object_set (rend, "xalign", (gfloat)0.5, "yalign", (gfloat)0.5, NULL);
    col = gtk_tree_view_column_new_with_attributes (title, rend, NULL);
    g_object_set_data (G_OBJECT (col), TR_COLUMN_ID_KEY,
                       GINT_TO_POINTER (FC_PRIORITY));
    gtk_tree_view_column_set_fixed_width (col, width);
    gtk_tree_view_column_set_sizing (col, GTK_TREE_VIEW_COLUMN_FIXED);
    gtk_tree_view_column_set_sort_column_id (col, FC_PRIORITY);
    gtk_tree_view_column_set_cell_data_func (col, rend, renderPriority, NULL, NULL);
    gtk_tree_view_append_column (tree_view, col);

    /* add tooltip to tree */
    gtk_tree_view_set_tooltip_column (tree_view, FC_LABEL_ESC);

    /* create the scrolled window and stick the view in it */
    scroll = gtk_scrolled_window_new (NULL, NULL);
    gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scroll),
                                    GTK_POLICY_AUTOMATIC,
                                    GTK_POLICY_AUTOMATIC);
    gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (scroll),
                                          GTK_SHADOW_IN);
    gtk_container_add (GTK_CONTAINER (scroll), view);
    gtk_widget_set_size_request (scroll, -1, 200);

    ret = scroll;
    data->view = view;
    data->top = scroll;
    g_object_set_data_full (G_OBJECT (ret), "file-data", data, freeData);
    gtr_file_list_set_torrent (ret, torrentId);

    pango_font_description_free (pango_font_description);
    return ret;
}
