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-rw-r--r--shell/e-folder-tree.c415
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diff --git a/shell/e-folder-tree.c b/shell/e-folder-tree.c
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-/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
-/* e-folder-set.c
- *
- * Copyright (C) 2000, 2001 Ximian, Inc.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
- *
- * 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.
- *
- * Author: Ettore Perazzoli
- */
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include "e-folder-tree.h"
-
-#include <string.h>
-#include <glib.h>
-
-
-struct _Folder {
- struct _Folder *parent;
- char *path;
- void *data;
- GList *subfolders;
-};
-typedef struct _Folder Folder;
-
-struct _EFolderTree {
- GHashTable *path_to_folder;
- GHashTable *data_to_path;
-
- EFolderDestroyNotify folder_destroy_notify;
- void *folder_destroy_notify_closure;
-};
-
-
-/* Utility functions. */
-
-static char *
-get_parent_path (const char *path)
-{
- const char *last_separator;
-
- g_assert (g_path_is_absolute (path));
-
- last_separator = strrchr (path, G_DIR_SEPARATOR);
-
- if (last_separator == path)
- return g_strdup (G_DIR_SEPARATOR_S);
-
- return g_strndup (path, last_separator - path);
-}
-
-static void
-traverse_subtree (EFolderTree *tree,
- Folder *root_folder,
- EFolderTreeForeachFunc foreach_func,
- void *data)
-{
- GList *p;
-
- g_assert (foreach_func != NULL);
-
- (* foreach_func) (tree, root_folder->path, root_folder->data, data);
-
- for (p = root_folder->subfolders; p != NULL; p = p->next) {
- Folder *folder;
-
- folder = (Folder *) p->data;
- traverse_subtree (tree, folder, foreach_func, data);
- }
-}
-
-
-/* Folder handling. */
-
-static Folder *
-folder_new (const char *path,
- void *data)
-{
- Folder *folder;
-
- folder = g_new (Folder, 1);
- folder->parent = NULL;
- folder->path = g_strdup (path);
- folder->data = data;
- folder->subfolders = NULL;
-
- return folder;
-}
-
-static void
-folder_remove_subfolder (Folder *folder,
- Folder *subfolder)
-{
- folder->subfolders = g_list_remove (folder->subfolders, subfolder);
- subfolder->parent = NULL;
-}
-
-static void
-folder_add_subfolder (Folder *folder,
- Folder *subfolder)
-{
- folder->subfolders = g_list_prepend (folder->subfolders, subfolder);
- subfolder->parent = folder;
-}
-
-static void
-folder_destroy (Folder *folder)
-{
- g_assert (folder->subfolders == NULL);
-
- if (folder->parent != NULL)
- folder_remove_subfolder (folder->parent, folder);
-
- g_free (folder->path);
-
- g_free (folder);
-}
-
-static void
-remove_folder (EFolderTree *folder_tree,
- Folder *folder)
-{
- if (folder->subfolders != NULL) {
- GList *p;
-
- for (p = folder->subfolders; p != NULL; p = p->next) {
- Folder *subfolder;
-
- subfolder = (Folder *) p->data;
- subfolder->parent = NULL;
- remove_folder (folder_tree, subfolder);
- }
-
- g_list_free (folder->subfolders);
- folder->subfolders = NULL;
- }
-
- g_hash_table_remove (folder_tree->path_to_folder, folder->path);
- g_hash_table_remove (folder_tree->data_to_path, folder->data);
-
- if (folder_tree->folder_destroy_notify != NULL)
- (* folder_tree->folder_destroy_notify) (folder_tree,
- folder->path,
- folder->data,
- folder_tree->folder_destroy_notify_closure);
-
- folder_destroy (folder);
-}
-
-
-/**
- * e_folder_tree_new:
- * @folder_destroy_notify: Function to be called when a folder gets removed from the tree
- * @closure: Additional data to pass to @folder_destroy_notify
- *
- * Create a new EFolderTree.
- *
- * Return value: A pointer to the newly created EFolderTree.
- **/
-EFolderTree *
-e_folder_tree_new (EFolderDestroyNotify folder_destroy_notify,
- void *closure)
-{
- EFolderTree *new;
- Folder *root_folder;
-
- new = g_new (EFolderTree, 1);
-
- new->folder_destroy_notify = folder_destroy_notify;
- new->folder_destroy_notify_closure = closure;
-
- new->path_to_folder = g_hash_table_new (g_str_hash, g_str_equal);
- new->data_to_path = g_hash_table_new (g_direct_hash, g_direct_equal);
-
- root_folder = folder_new (G_DIR_SEPARATOR_S, NULL);
- g_hash_table_insert (new->path_to_folder, root_folder->path, root_folder);
- g_hash_table_insert (new->data_to_path, root_folder->data, root_folder->path);
-
- return new;
-}
-
-/**
- * e_folder_tree_destroy:
- * @folder_tree: A pointer to an EFolderTree
- *
- * Destroy @folder_tree.
- **/
-void
-e_folder_tree_destroy (EFolderTree *folder_tree)
-{
- Folder *root_folder;
-
- g_return_if_fail (folder_tree != NULL);
-
- root_folder = g_hash_table_lookup (folder_tree->path_to_folder, G_DIR_SEPARATOR_S);
- remove_folder (folder_tree, root_folder);
-
- g_hash_table_destroy (folder_tree->path_to_folder);
- g_hash_table_destroy (folder_tree->data_to_path);
-
- g_free (folder_tree);
-}
-
-/**
- * e_folder_tree_add:
- * @folder_tree: A pointer to an EFolderTree
- * @path: Path at which the new folder must be added
- * @data: Data associated with the new folder
- *
- * Insert a new folder at @path, with the specified @data.
- *
- * Return value: %TRUE if successful, %FALSE if failed.
- **/
-gboolean
-e_folder_tree_add (EFolderTree *folder_tree,
- const char *path,
- void *data)
-{
- Folder *parent_folder;
- Folder *folder;
- const char *existing_path;
- char *parent_path;
-
- g_return_val_if_fail (folder_tree != NULL, FALSE);
- g_return_val_if_fail (path != NULL, FALSE);
- g_return_val_if_fail (g_path_is_absolute (path), FALSE);
-
- parent_path = get_parent_path (path);
-
- parent_folder = g_hash_table_lookup (folder_tree->path_to_folder, parent_path);
- if (parent_folder == NULL) {
- g_warning ("e_folder_tree_add() -- Trying to add a subfolder to a path that does not exist yet -- %s",
- parent_path);
- return FALSE;
- }
-
- folder = g_hash_table_lookup (folder_tree->path_to_folder, path);
- if (folder != NULL) {
- g_warning ("e_folder_tree_add() -- Trying to add a subfolder for a path that already exists -- %s",
- path);
- return FALSE;
- }
-
- existing_path = g_hash_table_lookup (folder_tree->data_to_path, data);
- if (existing_path != NULL) {
- g_warning ("e_folder_tree_add() -- Trying to add a folder with duplicate data -- %s",
- path);
- return FALSE;
- }
-
- folder = folder_new (path, data);
- folder_add_subfolder (parent_folder, folder);
-
- g_hash_table_insert (folder_tree->path_to_folder, folder->path, folder);
- g_hash_table_insert (folder_tree->data_to_path, data, folder->path);
-
- g_free (parent_path);
-
- return TRUE;
-}
-
-/**
- * e_folder_tree_remove:
- * @folder_tree: A pointer to an EFolderTree
- * @path: Path of the folder to remove
- *
- * Remove the folder at @path from @folder_tree.
- *
- * Return value: %TRUE if successful, %FALSE if failed.
- **/
-gboolean
-e_folder_tree_remove (EFolderTree *folder_tree,
- const char *path)
-{
- Folder *folder;
-
- g_return_val_if_fail (folder_tree != NULL, FALSE);
- g_return_val_if_fail (path != NULL, FALSE);
- g_return_val_if_fail (g_path_is_absolute (path), FALSE);
-
- folder = g_hash_table_lookup (folder_tree->path_to_folder, path);
- if (folder == NULL)
- return FALSE;
-
- remove_folder (folder_tree, folder);
- return TRUE;
-}
-
-/**
- * e_folder_tree_get_folder:
- * @folder_tree: A pointer to an EFolderTree
- * @path: Path of the folder for which we want to get the data
- *
- * Get the data for the folder at @path.
- *
- * Return value: The pointer to the data for the folder at @path.
- **/
-void *
-e_folder_tree_get_folder (EFolderTree *folder_tree,
- const char *path)
-{
- Folder *folder;
-
- g_return_val_if_fail (folder_tree != NULL, NULL);
- g_return_val_if_fail (path != NULL, NULL);
- g_return_val_if_fail (g_path_is_absolute (path), NULL);
-
- folder = g_hash_table_lookup (folder_tree->path_to_folder, path);
- if (folder == NULL)
- return NULL;
-
- return folder->data;
-}
-
-/**
- * e_folder_tree_get_subfolders:
- * @folder_tree: A pointer to an EFolderTree
- * @path: A path in @folder_tree
- *
- * Get a list of the paths of the subfolders of @path.
- *
- * Return value: A list of pointers to the paths of the subfolders. The list
- * and the strings must be freed by the caller.
- **/
-GList *
-e_folder_tree_get_subfolders (EFolderTree *folder_tree,
- const char *path)
-{
- Folder *folder;
- GList *list;
- GList *p;
-
- g_return_val_if_fail (folder_tree != NULL, NULL);
- g_return_val_if_fail (path != NULL, NULL);
- g_return_val_if_fail (g_path_is_absolute (path), NULL);
-
- folder = g_hash_table_lookup (folder_tree->path_to_folder, path);
- if (folder == NULL)
- return NULL;
-
- list = NULL;
- for (p = folder->subfolders; p != NULL; p = p->next) {
- const Folder *folder;
-
- folder = (const Folder *) p->data;
- list = g_list_prepend (list, g_strdup (folder->path));
- }
-
- return list;
-}
-
-
-/**
- * e_folder_tree_foreach:
- * @folder_tree:
- * @foreach_func:
- * @data:
- *
- * Call @foreach_func with the specified @data for all the folders
- * in @folder_tree, starting at the root node.
- **/
-void
-e_folder_tree_foreach (EFolderTree *folder_tree,
- EFolderTreeForeachFunc foreach_func,
- void *data)
-{
- Folder *root_node;
-
- g_return_if_fail (folder_tree != NULL);
- g_return_if_fail (foreach_func != NULL);
-
- root_node = g_hash_table_lookup (folder_tree->path_to_folder,
- G_DIR_SEPARATOR_S);
- if (root_node == NULL) {
- g_warning ("e_folder_tree_foreach -- What?! No root node!?");
- return;
- }
-
- traverse_subtree (folder_tree, root_node, foreach_func, data);
-}
-
-
-/**
- * e_folder_tree_get_path_for_data:
- * @folder_tree: A pointer to an EFolderTree
- * @data: The data for the folder for which the path is needed
- *
- * Look up the path for the specified @data.
- *
- * Return value: The path for the folder that holds that @data.
- **/
-const char *
-e_folder_tree_get_path_for_data (EFolderTree *folder_tree,
- const void *data)
-{
- g_return_val_if_fail (folder_tree != NULL, NULL);
- g_return_val_if_fail (data != NULL, NULL);
-
- return (const char *) g_hash_table_lookup (folder_tree->data_to_path, data);
-}