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gtk2/gtk/gtkfilesystemmodel.c
Matthias Clasen 6f9b92150f Don't use freed memory. (#127698, Taavi Talvik) 
Fri Nov 28 00:26:24 2003  Matthias Clasen  <maclas@gmx.de>

	* gtk/gtkfilesystemmodel.c (gtk_file_system_model_finalize):
	Don't use freed memory.  (#127698, Taavi Talvik)
2003-11-27 23:27:40 +00:00

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/* GTK - The GIMP Toolkit
* gtkfilesystemmodel.c: GtkTreeModel wrapping a GtkFileSystem
* Copyright (C) 2003, Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <string.h>
#include "gtkfilesystemmodel.h"
#include "gtkfilesystem.h"
#include "gtkintl.h"
#include "gtktreemodel.h"
typedef struct _GtkFileSystemModelClass GtkFileSystemModelClass;
typedef struct _FileModelNode FileModelNode;
#define GTK_FILE_SYSTEM_MODEL_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_FILE_SYSTEM_MODEL, GtkFileSystemModelClass))
#define GTK_IS_FILE_SYSTEM_MODEL_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_FILE_SYSTEM_MODEL))
#define GTK_FILE_SYSTEM_MODEL_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_FILE_SYSTEM_MODEL, GtkFileSystemModelClass))
struct _GtkFileSystemModelClass
{
GObjectClass parent_class;
};
struct _GtkFileSystemModel
{
GObject parent_instance;
GtkFileSystem *file_system;
GtkFileInfoType types;
FileModelNode *roots;
GtkFileFolder *root_folder;
GtkFileSystemModelFilter filter_func;
gpointer filter_data;
GSList *idle_clears;
GSource *idle_clear_source;
gushort max_depth;
guint show_hidden : 1;
guint show_folders : 1;
guint show_files : 1;
guint folders_only : 1;
};
struct _FileModelNode
{
GtkFilePath *path;
FileModelNode *next;
GtkFileInfo *info;
GtkFileFolder *folder;
FileModelNode *children;
FileModelNode *parent;
GtkFileSystemModel *model;
guint ref_count;
guint n_referenced_children;
gushort depth;
guint has_dummy : 1;
guint is_dummy : 1;
guint is_visible : 1;
guint loaded : 1;
guint idle_clear : 1;
};
static void gtk_file_system_model_class_init (GtkFileSystemModelClass *class);
static void gtk_file_system_model_iface_init (GtkTreeModelIface *iface);
static void gtk_file_system_model_init (GtkFileSystemModel *model);
static void gtk_file_system_model_finalize (GObject *object);
static GtkTreeModelFlags gtk_file_system_model_get_flags (GtkTreeModel *tree_model);
static gint gtk_file_system_model_get_n_columns (GtkTreeModel *tree_model);
static GType gtk_file_system_model_get_column_type (GtkTreeModel *tree_model,
gint index);
static gboolean gtk_file_system_model_get_iter (GtkTreeModel *tree_model,
GtkTreeIter *iter,
GtkTreePath *path);
static GtkTreePath * gtk_file_system_model_get_path (GtkTreeModel *tree_model,
GtkTreeIter *iter);
static void gtk_file_system_model_get_value (GtkTreeModel *tree_model,
GtkTreeIter *iter,
gint column,
GValue *value);
static gboolean gtk_file_system_model_iter_next (GtkTreeModel *tree_model,
GtkTreeIter *iter);
static gboolean gtk_file_system_model_iter_children (GtkTreeModel *tree_model,
GtkTreeIter *iter,
GtkTreeIter *parent);
static gboolean gtk_file_system_model_iter_has_child (GtkTreeModel *tree_model,
GtkTreeIter *iter);
static gint gtk_file_system_model_iter_n_children (GtkTreeModel *tree_model,
GtkTreeIter *iter);
static gboolean gtk_file_system_model_iter_nth_child (GtkTreeModel *tree_model,
GtkTreeIter *iter,
GtkTreeIter *parent,
gint n);
static gboolean gtk_file_system_model_iter_parent (GtkTreeModel *tree_model,
GtkTreeIter *iter,
GtkTreeIter *child);
static void gtk_file_system_model_ref_node (GtkTreeModel *tree_model,
GtkTreeIter *iter);
static void gtk_file_system_model_unref_node (GtkTreeModel *tree_model,
GtkTreeIter *iter);
static FileModelNode *file_model_node_new (GtkFileSystemModel *model,
const GtkFilePath *path);
static void file_model_node_free (FileModelNode *node);
static void file_model_node_ref (FileModelNode *node);
static void file_model_node_unref (GtkFileSystemModel *model,
FileModelNode *node);
static void file_model_node_idle_clear (FileModelNode *node);
static void file_model_node_idle_clear_cancel (FileModelNode *node);
static void file_model_node_child_unref (FileModelNode *parent);
static const GtkFileInfo *file_model_node_get_info (GtkFileSystemModel *model,
FileModelNode *node);
static gboolean file_model_node_is_visible (GtkFileSystemModel *model,
FileModelNode *node);
static void file_model_node_clear (GtkFileSystemModel *model,
FileModelNode *node);
static FileModelNode * file_model_node_get_children (GtkFileSystemModel *model,
FileModelNode *node);
static void roots_changed_callback (GtkFileSystem *file_system,
GtkFileSystemModel *model);
static void deleted_callback (GtkFileFolder *folder,
FileModelNode *node);
static void files_added_callback (GtkFileFolder *folder,
GSList *paths,
FileModelNode *node);
static void files_changed_callback (GtkFileFolder *folder,
GSList *paths,
FileModelNode *node);
static void files_removed_callback (GtkFileFolder *folder,
GSList *paths,
FileModelNode *node);
static void root_deleted_callback (GtkFileFolder *folder,
GtkFileSystemModel *model);
static void root_files_added_callback (GtkFileFolder *folder,
GSList *paths,
GtkFileSystemModel *model);
static void root_files_changed_callback (GtkFileFolder *folder,
GSList *paths,
GtkFileSystemModel *model);
static void root_files_removed_callback (GtkFileFolder *folder,
GSList *paths,
GtkFileSystemModel *model);
GType
_gtk_file_system_model_get_type (void)
{
static GType file_system_model_type = 0;
if (!file_system_model_type)
{
static const GTypeInfo file_system_model_info =
{
sizeof (GtkFileSystemModelClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) gtk_file_system_model_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GtkFileSystemModel),
0, /* n_preallocs */
(GInstanceInitFunc) gtk_file_system_model_init,
};
static const GInterfaceInfo file_system_info =
{
(GInterfaceInitFunc) gtk_file_system_model_iface_init, /* interface_init */
NULL, /* interface_finalize */
NULL /* interface_data */
};
file_system_model_type = g_type_register_static (G_TYPE_OBJECT,
"GtkFileSystemModel",
&file_system_model_info, 0);
g_type_add_interface_static (file_system_model_type,
GTK_TYPE_TREE_MODEL,
&file_system_info);
}
return file_system_model_type;
}
static void
gtk_file_system_model_class_init (GtkFileSystemModelClass *class)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (class);
gobject_class->finalize = gtk_file_system_model_finalize;
}
static void
gtk_file_system_model_iface_init (GtkTreeModelIface *iface)
{
iface->get_flags = gtk_file_system_model_get_flags;
iface->get_n_columns = gtk_file_system_model_get_n_columns;
iface->get_column_type = gtk_file_system_model_get_column_type;
iface->get_iter = gtk_file_system_model_get_iter;
iface->get_path = gtk_file_system_model_get_path;
iface->get_value = gtk_file_system_model_get_value;
iface->iter_next = gtk_file_system_model_iter_next;
iface->iter_children = gtk_file_system_model_iter_children;
iface->iter_has_child = gtk_file_system_model_iter_has_child;
iface->iter_n_children = gtk_file_system_model_iter_n_children;
iface->iter_nth_child = gtk_file_system_model_iter_nth_child;
iface->iter_parent = gtk_file_system_model_iter_parent;
iface->ref_node = gtk_file_system_model_ref_node;
iface->unref_node = gtk_file_system_model_unref_node;
}
static void
gtk_file_system_model_init (GtkFileSystemModel *model)
{
model->show_files = TRUE;
model->show_folders = TRUE;
model->show_hidden = FALSE;
}
static void
gtk_file_system_model_finalize (GObject *object)
{
GtkFileSystemModel *model = GTK_FILE_SYSTEM_MODEL (object);
FileModelNode *children, *next;
if (model->root_folder)
g_object_unref (model->root_folder);
children = model->roots;
while (children)
{
next = children->next;
file_model_node_free (children);
children = next;
}
}
/*
* ******************** GtkTreeModel methods ********************
*/
static GtkTreeModelFlags
gtk_file_system_model_get_flags (GtkTreeModel *tree_model)
{
GtkFileSystemModel *model = GTK_FILE_SYSTEM_MODEL (tree_model);
GtkTreeModelFlags flags = GTK_TREE_MODEL_ITERS_PERSIST;
if (model->max_depth == 1)
flags |= GTK_TREE_MODEL_LIST_ONLY;
return flags;
}
static gint
gtk_file_system_model_get_n_columns (GtkTreeModel *tree_model)
{
return GTK_FILE_SYSTEM_MODEL_N_COLUMNS;
}
static GType
gtk_file_system_model_get_column_type (GtkTreeModel *tree_model,
gint index)
{
switch (index)
{
case GTK_FILE_SYSTEM_MODEL_INFO:
return GTK_TYPE_FILE_INFO;
case GTK_FILE_SYSTEM_MODEL_DISPLAY_NAME:
return G_TYPE_STRING;
default:
g_assert_not_reached ();
return G_TYPE_NONE;
}
}
static gboolean
gtk_file_system_model_get_iter (GtkTreeModel *tree_model,
GtkTreeIter *iter,
GtkTreePath *path)
{
GtkTreeIter parent;
gint *indices;
gint depth, i;
indices = gtk_tree_path_get_indices (path);
depth = gtk_tree_path_get_depth (path);
g_return_val_if_fail (depth > 0, FALSE);
if (!gtk_tree_model_iter_nth_child (tree_model, iter, NULL, indices[0]))
return FALSE;
for (i = 1; i < depth; i++)
{
parent = *iter;
if (!gtk_tree_model_iter_nth_child (tree_model, iter, &parent, indices[i]))
return FALSE;
}
return TRUE;
}
static GtkTreePath *
gtk_file_system_model_get_path (GtkTreeModel *tree_model,
GtkTreeIter *iter)
{
GtkFileSystemModel *model = GTK_FILE_SYSTEM_MODEL (tree_model);
FileModelNode *node = iter->user_data;
GtkTreePath *result = gtk_tree_path_new ();
while (node)
{
FileModelNode *parent = node->parent;
FileModelNode *children;
int n = 0;
if (parent)
children = parent->children;
else
children = model->roots;
while (children != node)
{
if (children->is_visible)
n++;
children = children->next;
}
gtk_tree_path_prepend_index (result, n);
node = parent;
}
return result;
}
static void
gtk_file_system_model_get_value (GtkTreeModel *tree_model,
GtkTreeIter *iter,
gint column,
GValue *value)
{
GtkFileSystemModel *model = GTK_FILE_SYSTEM_MODEL (tree_model);
FileModelNode *node = iter->user_data;
switch (column)
{
case GTK_FILE_SYSTEM_MODEL_INFO:
g_value_init (value, GTK_TYPE_FILE_INFO);
g_value_set_boxed (value, file_model_node_get_info (model, node));
break;
case GTK_FILE_SYSTEM_MODEL_DISPLAY_NAME:
{
const GtkFileInfo *info = file_model_node_get_info (model, node);
g_value_init (value, G_TYPE_STRING);
g_value_set_string (value, gtk_file_info_get_display_name (info));
}
break;
default:
g_assert_not_reached ();
}
}
static gboolean
gtk_file_system_model_iter_next (GtkTreeModel *tree_model,
GtkTreeIter *iter)
{
FileModelNode *node = iter->user_data;
node = node->next;
while (node && !node->is_visible)
node = node->next;
iter->user_data = node;
return node != NULL;
}
static gboolean
gtk_file_system_model_iter_children (GtkTreeModel *tree_model,
GtkTreeIter *iter,
GtkTreeIter *parent)
{
GtkFileSystemModel *model = GTK_FILE_SYSTEM_MODEL (tree_model);
FileModelNode *children;
if (parent)
{
FileModelNode *parent_node = parent->user_data;
children = file_model_node_get_children (model, parent_node);
}
else
{
children = model->roots;
}
while (children && !children->is_visible)
children = children->next;
iter->user_data = children;
return children != NULL;
}
static gboolean
gtk_file_system_model_iter_has_child (GtkTreeModel *tree_model,
GtkTreeIter *iter)
{
FileModelNode *node = iter->user_data;
GtkFileSystemModel *model = GTK_FILE_SYSTEM_MODEL (tree_model);
if (node->depth == model->max_depth)
return FALSE;
else
{
const GtkFileInfo *info = file_model_node_get_info (model, node);
return gtk_file_info_get_is_folder (info);
}
}
static gint
gtk_file_system_model_iter_n_children (GtkTreeModel *tree_model,
GtkTreeIter *iter)
{
GtkFileSystemModel *model = GTK_FILE_SYSTEM_MODEL (tree_model);
FileModelNode *children;
gint n = 0;
if (iter)
{
FileModelNode *node = iter->user_data;
children = file_model_node_get_children (model, node);
}
else
{
children = model->roots;
}
while (children)
{
if (children->is_visible)
n++;
children = children->next;
}
return n;
}
static gboolean
gtk_file_system_model_iter_nth_child (GtkTreeModel *tree_model,
GtkTreeIter *iter,
GtkTreeIter *parent,
gint n)
{
GtkFileSystemModel *model = GTK_FILE_SYSTEM_MODEL (tree_model);
FileModelNode *children;
if (parent)
{
FileModelNode *parent_node = parent->user_data;
children = file_model_node_get_children (model, parent_node);
}
else
{
children = model->roots;
}
while (children && !children->is_visible)
children = children->next;
while (n && children)
{
n--;
children = children->next;
while (children && !children->is_visible)
children = children->next;
}
iter->user_data = children;
return children != NULL;
}
static gboolean
gtk_file_system_model_iter_parent (GtkTreeModel *tree_model,
GtkTreeIter *iter,
GtkTreeIter *child)
{
FileModelNode *node = child->user_data;
node = node->parent;
iter->user_data = node;
return node != NULL;
}
static void
gtk_file_system_model_ref_node (GtkTreeModel *tree_model,
GtkTreeIter *iter)
{
file_model_node_ref (iter->user_data);
}
static void
gtk_file_system_model_unref_node (GtkTreeModel *tree_model,
GtkTreeIter *iter)
{
file_model_node_unref (GTK_FILE_SYSTEM_MODEL (tree_model),
iter->user_data);
}
/**
* _gtk_file_system_model_new:
* @file_system: an object implementing #GtkFileSystem
* @root_path: the path of root of the file system to display,
* or %NULL to display starting from the
* root or roots of the fielsystem.
* @max_depth: the maximum depth from the children of @root_path
* or the roots of the file system to display in
* the file selector). A depth of 0 displays
* only the immediate children of @root_path,
* or the roots of the filesystem. -1 for no
* maximum depth.
* @types: a bitmask indicating the types of information
* that is desired about the files. This will
* determine what information is returned by
* _gtk_file_system_model_get_info().
*
* Creates a new #GtkFileSystemModel object. The #GtkFileSystemModel
* object wraps a #GtkFileSystem interface as a #GtkTreeModel.
* Using the @root_path and @max_depth parameters, the tree model
* can be restricted to a subportion of the entire file system.
*
* Return value: the newly created #GtkFileSystemModel object.
**/
GtkFileSystemModel *
_gtk_file_system_model_new (GtkFileSystem *file_system,
const GtkFilePath *root_path,
gint max_depth,
GtkFileInfoType types)
{
GtkFileSystemModel *model;
GSList *roots = NULL;
GSList *tmp_list;
g_return_val_if_fail (GTK_IS_FILE_SYSTEM (file_system), NULL);
model = g_object_new (GTK_TYPE_FILE_SYSTEM_MODEL, NULL);
model->file_system = g_object_ref (file_system);
if (max_depth < 0)
model->max_depth = G_MAXUSHORT;
else
model->max_depth = MIN (max_depth, G_MAXUSHORT);
model->types = types | GTK_FILE_INFO_IS_FOLDER | GTK_FILE_INFO_IS_HIDDEN;
if (root_path)
{
GSList *child_paths;
model->root_folder = gtk_file_system_get_folder (file_system, root_path,
model->types,
NULL); /* NULL-GError */
if (model->root_folder &&
gtk_file_folder_list_children (model->root_folder,
&child_paths,
NULL)) /* NULL-GError */
{
roots = child_paths;
g_signal_connect_object (model->root_folder, "deleted",
G_CALLBACK (root_deleted_callback), model, 0);
g_signal_connect_object (model->root_folder, "files-added",
G_CALLBACK (root_files_added_callback), model, 0);
g_signal_connect_object (model->root_folder, "files-changed",
G_CALLBACK (root_files_changed_callback), model, 0);
g_signal_connect_object (model->root_folder, "files-removed",
G_CALLBACK (root_files_removed_callback), model, 0);
}
}
else
{
roots = gtk_file_system_list_roots (file_system);
g_signal_connect_object (file_system, "roots-changed",
G_CALLBACK (roots_changed_callback), model, 0);
}
roots = gtk_file_paths_sort (roots);
for (tmp_list = roots; tmp_list; tmp_list = tmp_list->next)
{
FileModelNode *node = file_model_node_new (model, tmp_list->data);
gtk_file_path_free (tmp_list->data);
node->is_visible = file_model_node_is_visible (model, node);
node->next = model->roots;
node->depth = 0;
model->roots = node;
}
g_slist_free (roots);
model->roots = (FileModelNode *)g_slist_reverse ((GSList *)model->roots);
return model;
}
static void
model_refilter_recurse (GtkFileSystemModel *model,
FileModelNode *parent,
GtkTreePath *path)
{
GtkTreeModel *tree_model = GTK_TREE_MODEL (model);
int i = 0;
FileModelNode *nodes;
gboolean has_children = FALSE;
if (parent && !parent->loaded)
return;
if (parent)
nodes = parent->children;
else
nodes = model->roots;
while (nodes)
{
FileModelNode *next = nodes->next;
gboolean is_visible;
gtk_tree_path_append_index (path, i);
is_visible = file_model_node_is_visible (model, nodes);
if (!is_visible && nodes->is_visible)
{
file_model_node_clear (model, nodes);
gtk_tree_model_row_deleted (tree_model, path);
nodes->is_visible = FALSE;
}
else if (is_visible && !nodes->is_visible)
{
GtkTreeIter iter;
iter.user_data = nodes;
gtk_tree_model_row_inserted (tree_model, path, &iter);
nodes->is_visible = TRUE;
}
else
model_refilter_recurse (model, nodes, path);
if (is_visible)
{
has_children = TRUE;
i++;
}
gtk_tree_path_up (path);
nodes = next;
}
if (parent && !has_children)
{
/* Fixme - need to insert dummy node here */
}
}
static void
model_refilter_all (GtkFileSystemModel *model)
{
GtkTreePath *path;
path = gtk_tree_path_new ();
model_refilter_recurse (model, NULL, path);
gtk_tree_path_free (path);
}
/**
* _gtk_file_system_model_set_show_hidden:
* @model: a #GtkFileSystemModel
* @show_hidden: whether hidden files should be displayed
*
* Sets whether hidden files should be included in the #GtkTreeModel
* for display.
**/
void
_gtk_file_system_model_set_show_hidden (GtkFileSystemModel *model,
gboolean show_hidden)
{
show_hidden = show_hidden != FALSE;
if (show_hidden != model->show_hidden)
{
model->show_hidden = show_hidden;
model_refilter_all (model);
}
}
/**
* _gtk_file_system_model_set_show_folders:
* @model: a #GtkFileSystemModel
* @show_folders: whether folders should be displayed
*
* Sets whether folders should be included in the #GtkTreeModel for
* display.
**/
void
_gtk_file_system_model_set_show_folders (GtkFileSystemModel *model,
gboolean show_folders)
{
show_folders = show_folders != FALSE;
if (show_folders != model->show_folders)
{
model->show_folders = show_folders;
model_refilter_all (model);
}
}
/**
* _gtk_file_system_model_set_show_files:
* @model: a #GtkFileSystemModel
* @show_files: whether files (as opposed to folders) should
* be displayed.
*
* Sets whether files (as opposed to folders) should be included
* in the #GtkTreeModel for display.
**/
void
_gtk_file_system_model_set_show_files (GtkFileSystemModel *model,
gboolean show_files)
{
show_files = show_files != FALSE;
if (show_files != model->show_files)
{
model->show_files = show_files;
model_refilter_all (model);
}
}
/**
* _gtk_file_system_model_get_info:
* @model: a #GtkFileSystemModel
* @iter: a #GtkTreeIter pointing to a row of @model
*
* Gets the #GtkFileInfo structure for a particular row
* of @model. The information included in this structure
* is determined by the @types parameter to
* _gtk_file_system_model_new().
*
* Return value: a #GtkFileInfo structure. This structure
* is owned by @model and must not be modified or freed.
* If you want to save the information for later use,
* you must make a copy, since the structure may be
* freed on later changes to the file system.
**/
const GtkFileInfo *
_gtk_file_system_model_get_info (GtkFileSystemModel *model,
GtkTreeIter *iter)
{
return file_model_node_get_info (model, iter->user_data);
}
/**
* _gtk_file_system_model_get_path:
* @model: a #GtkFileSystemModel
* @iter: a #GtkTreeIter pointing to a row of @model
*
* Gets the path for a particular row in @model.
*
* Return value: the path. This string is owned by @model and
* or freed. If you want to save the path for later use,
* you must make a copy, since the string may be freed
* on later changes to the file system.
**/
const GtkFilePath *
_gtk_file_system_model_get_path (GtkFileSystemModel *model,
GtkTreeIter *iter)
{
FileModelNode *node = iter->user_data;
if (node->is_dummy)
return node->parent->path;
else
return node->path;
}
static void
unref_node_and_parents (GtkFileSystemModel *model,
FileModelNode *node)
{
file_model_node_unref (model, node);
if (node->parent)
file_model_node_unref (model, node->parent);
}
static FileModelNode *
find_child_node (GtkFileSystemModel *model,
FileModelNode *parent_node,
const GtkFilePath *path)
{
FileModelNode *children;
if (parent_node)
children = file_model_node_get_children (model, parent_node);
else
children = model->roots;
while (children)
{
if (children->is_visible &&
children->path &&
gtk_file_path_compare (children->path, path) == 0)
return children;
children = children->next;
}
return NULL;
}
static FileModelNode *
find_and_ref_path (GtkFileSystemModel *model,
const GtkFilePath *path,
GSList **cleanups)
{
GtkFilePath *parent_path;
FileModelNode *parent_node;
FileModelNode *child_node;
GtkFileFolder *folder;
if (!gtk_file_system_get_parent (model->file_system, path, &parent_path, NULL))
return NULL;
if (parent_path)
{
parent_node = find_and_ref_path (model, parent_path, cleanups);
gtk_file_path_free (parent_path);
if (!parent_node)
return NULL;
}
else
parent_node = NULL;
child_node = find_child_node (model, parent_node, path);
if (child_node)
{
file_model_node_ref (child_node);
return child_node;
}
folder = gtk_file_system_get_folder (model->file_system,
path,
model->types,
NULL); /* NULL-GError */
if (folder)
{
*cleanups = g_slist_prepend (*cleanups, folder);
child_node = find_child_node (model, parent_node, path);
if (child_node)
{
file_model_node_ref (child_node);
return child_node;
}
}
if (parent_node)
unref_node_and_parents (model, parent_node);
return NULL;
}
/**
* _gtk_file_system_model_set_filter:
* @mode: a #GtkFileSystemModel
* @filter: function to be called for each file
* @user_data: data to pass to @filter
*
* Sets a callback called for each file/directory to see whether
* it should be included in model. If this function was made
* public, we'd want to include a GDestroyNotify as well.
**/
void
_gtk_file_system_model_set_filter (GtkFileSystemModel *model,
GtkFileSystemModelFilter filter,
gpointer user_data)
{
g_return_if_fail (GTK_IS_FILE_SYSTEM_MODEL (model));
model->filter_func = filter;
model->filter_data = user_data;
model_refilter_all (model);
}
/**
* _gtk_file_system_model_path_do:
* @model: a #GtkFileSystemModel
* @path: a path pointing to a file in the filesystem
* for @model.
* @func: Function to call with the path and iter corresponding
* to @path.
* @user_data: data to pass to @func
*
* Locates @path within @model, referencing
* (gtk_tree_model_ref_node ()) all parent nodes,
* calls @func passing in the path and iter for @path,
* then unrefs all the parent nodes.
*
* The reason for doing this operation as a callback
* is so that if the operation performed with the the
* path and iter results in referencing the the node
* and/or parent nodes, we don't load all the information
* about the nodes.
*
* This function is particularly useful for expanding
* a #GtkTreeView to a particular point in the file system.
*
* Return value: %TRUE if the path was successfully
* found in @model and @func was called.
**/
gboolean
_gtk_file_system_model_path_do (GtkFileSystemModel *model,
const GtkFilePath *path,
GtkFileSystemModelPathFunc func,
gpointer user_data)
{
GSList *cleanups = NULL;
FileModelNode *node = find_and_ref_path (model, path, &cleanups);
if (node)
{
GtkTreeIter iter;
GtkTreePath *path;
iter.user_data = node;
path = gtk_tree_model_get_path (GTK_TREE_MODEL (model), &iter);
(*func) (model, path, &iter, user_data);
gtk_tree_path_free (path);
unref_node_and_parents (model, node);
}
g_slist_foreach (cleanups, (GFunc)g_object_unref, NULL);
g_slist_free (cleanups);
return node != NULL;
}
static FileModelNode *
file_model_node_new (GtkFileSystemModel *model,
const GtkFilePath *path)
{
FileModelNode *node = g_new0 (FileModelNode, 1);
node->model = model;
node->path = path ? gtk_file_path_copy (path) : NULL;
return node;
}
static void
file_model_node_free (FileModelNode *node)
{
file_model_node_clear (node->model, node);
if (node->path)
gtk_file_path_free (node->path);
if (node->info)
gtk_file_info_free (node->info);
g_free (node);
}
static const GtkFileInfo *
file_model_node_get_info (GtkFileSystemModel *model,
FileModelNode *node)
{
if (!node->info)
{
if (node->is_dummy)
{
node->info = gtk_file_info_new ();
gtk_file_info_set_display_name (node->info, _("(Empty)"));
}
else if (node->parent || model->root_folder)
{
node->info = gtk_file_folder_get_info (node->parent ? node->parent->folder : model->root_folder,
node->path,
NULL); /* NULL-GError */
}
else
{
node->info = gtk_file_system_get_root_info (model->file_system,
node->path,
model->types,
NULL); /* NULL-GError */
}
}
return node->info;
}
static gboolean
file_model_node_is_visible (GtkFileSystemModel *model,
FileModelNode *node)
{
if (model->show_hidden && model->show_folders && model->show_files)
return TRUE;
else
{
const GtkFileInfo *info = file_model_node_get_info (model, node);
gboolean is_folder = gtk_file_info_get_is_folder (info);
if (!model->show_folders && is_folder)
return FALSE;
if (!model->show_files && !is_folder)
return FALSE;
if (!model->show_hidden && gtk_file_info_get_is_hidden (info))
return FALSE;
if (model->filter_func && !model->filter_func (model, node->path, info, model->filter_data))
return FALSE;
return TRUE;
}
}
static void
file_model_node_clear (GtkFileSystemModel *model,
FileModelNode *node)
{
FileModelNode *children;
file_model_node_idle_clear_cancel (node);
children = node->children;
node->children = NULL;
node->loaded = FALSE;
while (children)
{
FileModelNode *next = children->next;
file_model_node_free (children);
children = next;
}
if (node->folder)
{
/* Unreffing node->folder may cause roots_changed,
* so we need to be careful about ordering.
*/
GtkFileFolder *folder = node->folder;
node->folder = NULL;
g_signal_handlers_disconnect_by_func (folder, G_CALLBACK (deleted_callback), node);
g_signal_handlers_disconnect_by_func (folder, G_CALLBACK (files_added_callback), node);
g_signal_handlers_disconnect_by_func (folder, G_CALLBACK (files_changed_callback), node);
g_signal_handlers_disconnect_by_func (folder, G_CALLBACK (files_removed_callback), node);
g_object_unref (folder);
}
}
static void
file_model_node_ref (FileModelNode *node)
{
node->ref_count++;
if (node->ref_count == 1 && node->parent)
node->parent->n_referenced_children++;
}
static gboolean
idle_clear_callback (GtkFileSystemModel *model)
{
while (model->idle_clears)
{
FileModelNode *node = model->idle_clears->data;
model->idle_clears = g_slist_delete_link (model->idle_clears, model->idle_clears);
node->idle_clear = FALSE;
file_model_node_clear (node->model, node);
}
return FALSE;
}
static void
file_model_node_idle_clear (FileModelNode *node)
{
if (!node->idle_clear)
{
GtkFileSystemModel *model = node->model;
node->idle_clear = TRUE;
if (!model->idle_clears)
{
model->idle_clear_source = g_idle_source_new ();
g_source_set_priority (model->idle_clear_source, G_PRIORITY_HIGH);
g_source_set_closure (model->idle_clear_source,
g_cclosure_new_object (G_CALLBACK (idle_clear_callback),
G_OBJECT (model)));
g_source_attach (model->idle_clear_source, NULL);
}
model->idle_clears = g_slist_prepend (model->idle_clears, node);
node->idle_clear = TRUE;
}
}
static void
file_model_node_idle_clear_cancel (FileModelNode *node)
{
if (node->idle_clear)
{
GtkFileSystemModel *model = node->model;
model->idle_clears = g_slist_remove (model->idle_clears, node);
if (!model->idle_clears)
{
g_source_destroy (model->idle_clear_source);
model->idle_clear_source = NULL;
}
node->idle_clear = FALSE;
}
}
static void
file_model_node_unref (GtkFileSystemModel *model,
FileModelNode *node)
{
node->ref_count--;
if (node->ref_count == 0)
{
file_model_node_clear (model, node);
if (node->parent)
file_model_node_child_unref (node->parent);
}
}
static void
file_model_node_child_unref (FileModelNode *parent)
{
parent->n_referenced_children--;
if (parent->n_referenced_children == 0)
file_model_node_idle_clear (parent);
}
static FileModelNode *
file_model_node_get_children (GtkFileSystemModel *model,
FileModelNode *node)
{
if (node->ref_count == 0)
return NULL;
if (!node->loaded)
{
const GtkFileInfo *info = file_model_node_get_info (model, node);
gboolean has_children = FALSE;
gboolean is_folder = node->depth < model->max_depth && gtk_file_info_get_is_folder (info);
file_model_node_idle_clear_cancel (node);
if (is_folder)
node->folder = gtk_file_system_get_folder (model->file_system,
node->path,
model->types,
NULL); /* NULL-GError */
if (node->folder)
{
GSList *child_paths, *tmp_list;
if (gtk_file_folder_list_children (node->folder, &child_paths, NULL)) /* NULL-GError */
{
child_paths = gtk_file_paths_sort (child_paths);
for (tmp_list = child_paths; tmp_list; tmp_list = tmp_list->next)
{
FileModelNode *child_node = file_model_node_new (model, tmp_list->data);
gtk_file_path_free (tmp_list->data);
child_node->next = node->children;
child_node->parent = node;
child_node->depth = node->depth + 1;
child_node->is_visible = file_model_node_is_visible (model, child_node);
if (child_node->is_visible)
has_children = TRUE;
node->children = child_node;
}
g_slist_free (child_paths);
}
node->children = (FileModelNode *)g_slist_reverse ((GSList *)node->children);
g_signal_connect (node->folder, "deleted",
G_CALLBACK (deleted_callback), node);
g_signal_connect (node->folder, "files-added",
G_CALLBACK (files_added_callback), node);
g_signal_connect (node->folder, "files-changed",
G_CALLBACK (files_changed_callback), node);
g_signal_connect (node->folder, "files-removed",
G_CALLBACK (files_removed_callback), node);
g_object_set_data (G_OBJECT (node->folder), "model-node", node);
}
if (is_folder && !has_children)
{
/* The hard case ... we claimed this folder had children, but actually
* it didn't. We have to add a dummy child, possibly to remove later.
*/
FileModelNode *child_node = file_model_node_new (model, NULL);
child_node->is_visible = TRUE;
child_node->parent = node;
child_node->is_dummy = TRUE;
node->children = child_node;
node->has_dummy = TRUE;
}
node->loaded = TRUE;
}
return node->children;
}
static void
do_files_added (GtkFileSystemModel *model,
FileModelNode *parent_node,
GSList *paths)
{
GtkTreeModel *tree_model = GTK_TREE_MODEL (model);
FileModelNode *children;
FileModelNode *prev = NULL;
GtkTreeIter iter;
GtkTreePath *path;
GSList *sorted_paths;
GSList *tmp_list;
sorted_paths = gtk_file_paths_sort (g_slist_copy (paths));
if (parent_node)
{
iter.user_data = parent_node;
path = gtk_tree_model_get_path (tree_model, &iter);
children = parent_node->children;
}
else
{
path = gtk_tree_path_new ();
children = model->roots;
}
gtk_tree_path_down (path);
if (parent_node && parent_node->has_dummy)
{
prev = children;
children = children->next;
gtk_tree_path_next (path);
}
for (tmp_list = sorted_paths; tmp_list; tmp_list = tmp_list->next)
{
const GtkFilePath *file_path = tmp_list->data;
while (children &&
(!children->path || gtk_file_path_compare (children->path, file_path) < 0))
{
prev = children;
if (children->is_visible)
gtk_tree_path_next (path);
children = children->next;
}
if (children &&
children->path && gtk_file_path_compare (children->path, file_path) == 0)
{
/* Shouldn't happen */
}
else
{
FileModelNode *new;
new = file_model_node_new (model, file_path);
if (children)
new->next = children;
if (prev)
prev->next = new;
else if (parent_node)
parent_node->children = new;
else
model->roots = new;
prev = new;
if (parent_node)
{
new->parent = parent_node;
new->depth = parent_node->depth + 1;
}
new->is_visible = file_model_node_is_visible (model, new);
if (new->is_visible)
{
iter.user_data = new;
path = gtk_tree_model_get_path (tree_model, &iter);
gtk_tree_model_row_inserted (tree_model, path, &iter);
if (gtk_file_system_model_iter_has_child (tree_model, &iter))
gtk_tree_model_row_has_child_toggled (tree_model, path, &iter);
if (parent_node && parent_node->has_dummy)
{
FileModelNode *dummy = parent_node->children;
GtkTreePath *dummy_path;
parent_node->children = parent_node->children->next;
parent_node->has_dummy = FALSE;
dummy_path = gtk_tree_path_copy (path);
gtk_tree_path_up (dummy_path);
gtk_tree_path_down (dummy_path);
gtk_tree_model_row_deleted (tree_model, dummy_path);
gtk_tree_path_free (dummy_path);
if (dummy->ref_count)
file_model_node_child_unref (parent_node);
file_model_node_free (dummy);
}
gtk_tree_path_next (path);
}
}
}
gtk_tree_path_free (path);
g_slist_free (sorted_paths);
}
static void
do_files_changed (GtkFileSystemModel *model,
FileModelNode *parent_node,
GSList *paths)
{
GtkTreeModel *tree_model = GTK_TREE_MODEL (model);
FileModelNode *children;
FileModelNode *prev = NULL;
GtkTreeIter iter;
GtkTreePath *path;
GSList *sorted_paths;
GSList *tmp_list;
sorted_paths = gtk_file_paths_sort (g_slist_copy (paths));
if (parent_node)
{
iter.user_data = parent_node;
path = gtk_tree_model_get_path (tree_model, &iter);
children = parent_node->children;
}
else
{
path = gtk_tree_path_new ();
children = model->roots;
}
gtk_tree_path_down (path);
if (parent_node && parent_node->has_dummy)
{
prev = children;
children = children->next;
gtk_tree_path_next (path);
}
for (tmp_list = sorted_paths; tmp_list; tmp_list = tmp_list->next)
{
const GtkFilePath *file_path = tmp_list->data;
while (children &&
(!children->path || gtk_file_path_compare (children->path, file_path) < 0))
{
prev = children;
if (children->is_visible)
gtk_tree_path_next (path);
children = children->next;
}
if (children &&
children->path && gtk_file_path_compare (children->path, file_path) == 0)
{
gtk_tree_model_row_changed (tree_model, path, &iter);
}
else
{
/* Shouldn't happen */
}
}
gtk_tree_path_free (path);
g_slist_free (sorted_paths);
}
static void
do_files_removed (GtkFileSystemModel *model,
FileModelNode *parent_node,
GSList *paths)
{
GtkTreeModel *tree_model = GTK_TREE_MODEL (model);
FileModelNode *children;
FileModelNode *prev = NULL;
GtkTreeIter iter;
GtkTreePath *path;
GSList *sorted_paths;
GSList *tmp_list;
FileModelNode *tmp_child;
gint n_visible;
sorted_paths = gtk_file_paths_sort (g_slist_copy (paths));
if (parent_node)
{
iter.user_data = parent_node;
path = gtk_tree_model_get_path (tree_model, &iter);
children = parent_node->children;
}
else
{
path = gtk_tree_path_new ();
children = model->roots;
}
/* Count the number of currently visible children, so that
* can catch when we need to insert a dummy node.
*/
n_visible = 0;
for (tmp_child = children; tmp_child; tmp_child = tmp_child->next)
{
if (tmp_child->is_visible)
n_visible++;
}
gtk_tree_path_down (path);
if (parent_node && parent_node->has_dummy)
{
prev = children;
children = children->next;
gtk_tree_path_next (path);
}
for (tmp_list = sorted_paths; tmp_list; tmp_list = tmp_list->next)
{
const GtkFilePath *file_path = tmp_list->data;
while (children &&
(!children->path || gtk_file_path_compare (children->path, file_path) < 0))
{
prev = children;
if (children->is_visible)
gtk_tree_path_next (path);
children = children->next;
}
if (children &&
children->path && gtk_file_path_compare (children->path, file_path) == 0)
{
FileModelNode *next = children->next;
if (children->is_visible)
n_visible--;
if (n_visible == 0)
{
FileModelNode *dummy = file_model_node_new (model, NULL);
dummy->is_visible = TRUE;
dummy->parent = parent_node;
dummy->is_dummy = TRUE;
parent_node->children = dummy;
parent_node->has_dummy = TRUE;
iter.user_data = dummy;
gtk_tree_model_row_inserted (tree_model, path, &iter);
gtk_tree_path_next (path);
prev = dummy;
}
if (prev)
prev->next = next;
else if (parent_node)
parent_node->children = next;
else
model->roots = next;
if (parent_node && children->ref_count)
file_model_node_child_unref (parent_node);
if (children->is_visible)
gtk_tree_model_row_deleted (tree_model, path);
file_model_node_free (children);
children = next;
}
else
{
/* Shouldn't happen */
}
}
gtk_tree_path_free (path);
g_slist_free (sorted_paths);
}
static void
roots_changed_callback (GtkFileSystem *file_system,
GtkFileSystemModel *model)
{
GtkTreeModel *tree_model = GTK_TREE_MODEL (model);
GSList *new_roots;
GSList *tmp_list;
FileModelNode *children;
FileModelNode *prev = NULL;
GtkTreePath *path;
new_roots = gtk_file_system_list_roots (file_system);
new_roots = gtk_file_paths_sort (new_roots);
children = model->roots;
tmp_list = new_roots;
path = gtk_tree_path_new ();
gtk_tree_path_down (path);
while (children || tmp_list)
{
FileModelNode *next = NULL;
int cmp;
if (tmp_list && children)
cmp = gtk_file_path_compare (children->path, tmp_list->data);
else if (children)
cmp = -1;
else
cmp = 1;
if (cmp < 0)
{
next = children->next;
if (prev)
prev->next = children->next;
else
model->roots = children->next;
if (children->is_visible)
gtk_tree_model_row_deleted (tree_model, path);
file_model_node_free (children);
}
else if (cmp == 0)
{
/* Already there
*/
next = children->next;
prev = children;
if (children->is_visible)
gtk_tree_path_next (path);
}
else
{
GtkTreeIter iter;
FileModelNode *node = file_model_node_new (model, tmp_list->data);
node->is_visible = file_model_node_is_visible (model, node);
node->next = children;
node->depth = 0;
if (prev)
prev->next = node;
else
model->roots = node;
if (node->is_visible)
{
iter.user_data = node;
gtk_tree_model_row_inserted (tree_model, path, &iter);
if (gtk_file_system_model_iter_has_child (tree_model, &iter))
gtk_tree_model_row_has_child_toggled (tree_model, path, &iter);
gtk_tree_path_next (path);
}
prev = node;
}
if (cmp <= 0)
{
children = next;
}
if (cmp >= 0)
{
gtk_file_path_free (tmp_list->data);
tmp_list = tmp_list->next;
}
}
g_slist_free (new_roots);
gtk_tree_path_free (path);
}
static void
deleted_callback (GtkFileFolder *folder,
FileModelNode *node)
{
}
static void
files_added_callback (GtkFileFolder *folder,
GSList *paths,
FileModelNode *node)
{
do_files_added (node->model, node, paths);
}
static void
files_changed_callback (GtkFileFolder *folder,
GSList *paths,
FileModelNode *node)
{
do_files_changed (node->model, node, paths);
}
static void
files_removed_callback (GtkFileFolder *folder,
GSList *paths,
FileModelNode *node)
{
do_files_removed (node->model, node, paths);
}
static void
root_deleted_callback (GtkFileFolder *folder,
GtkFileSystemModel *model)
{
}
static void
root_files_added_callback (GtkFileFolder *folder,
GSList *paths,
GtkFileSystemModel *model)
{
do_files_added (model, NULL, paths);
}
static void
root_files_changed_callback (GtkFileFolder *folder,
GSList *paths,
GtkFileSystemModel *model)
{
do_files_changed (model, NULL, paths);
}
static void
root_files_removed_callback (GtkFileFolder *folder,
GSList *paths,
GtkFileSystemModel *model)
{
do_files_removed (model, NULL, paths);
}
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