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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsISupports.idl"
+
+interface nsIArray;
+interface nsIMutableArray;
+
+[scriptable, uuid(1FE6A9CD-2B18-4dd5-A176-C2B32FA4F683)]
+interface nsIJumpListBuilder : nsISupports
+{
+ /**
+ * JumpLists
+ *
+ * Jump lists are built and then applied. Modifying an applied jump list is not
+ * permitted. Callers should begin the creation of a new jump list using
+ * initListBuild, add sub lists using addListToBuild, then commit the jump list
+ * using commitListBuild. Lists are built in real-time during the sequence of
+ * build calls, make sure to check for errors on each individual step.
+ *
+ * The default number of allowed items in a jump list is ten. Users can change
+ * the number through system preferences. User may also pin items to jump lists,
+ * which take up additional slots. Applications do not have control over the
+ * number of items allowed in jump lists; excess items added are dropped by the
+ * system. Item insertion priority is defined as first to last added.
+ *
+ * Users may remove items from jump lists after they are commited. The system
+ * tracks removed items between commits. A list of these items is returned by
+ * a call to initListBuild. nsIJumpListBuilder does not filter entries added that
+ * have been removed since the last commit. To prevent repeatedly adding entries
+ * users have removed, applications are encoraged to track removed items
+ * internally.
+ *
+ * Each list is made up of an array of nsIJumpListItem representing items
+ * such as shortcuts, links, and separators. See nsIJumpListItem for information
+ * on adding additional jump list types.
+ */
+
+ /**
+ * List Types
+ */
+
+ /**
+ * Task List
+ *
+ * Tasks are common actions performed by users within the application. A task
+ * can be represented by an application shortcut and associated command line
+ * parameters or a URI. Task lists should generally be static lists that do not
+ * change often, if at all - similar to an application menu.
+ *
+ * Tasks are given the highest priority of all lists when space is limited.
+ */
+ const short JUMPLIST_CATEGORY_TASKS = 0;
+
+ /**
+ * Recent or Frequent list
+ *
+ * Recent and frequent lists are based on Window's recent document lists. The
+ * lists are generated automatically by Windows. Applications that use recent
+ * or frequent lists should keep document use tracking up to date by calling
+ * the SHAddToRecentDocs shell api.
+ */
+ const short JUMPLIST_CATEGORY_RECENT = 1;
+ const short JUMPLIST_CATEGORY_FREQUENT = 2;
+
+ /**
+ * Custom Lists
+ *
+ * Custom lists can be made up of tasks, links, and separators. The title of
+ * of the list is passed through the optional string parameter of addBuildList.
+ */
+ const short JUMPLIST_CATEGORY_CUSTOMLIST = 3;
+
+ /**
+ * Indicates whether jump list taskbar features are supported by the current
+ * host.
+ */
+ readonly attribute short available;
+
+ /**
+ * JumpList management
+ *
+ * @throw NS_ERROR_NOT_AVAILABLE on all calls if taskbar functionality
+ * is not supported by the operating system.
+ */
+
+ /**
+ * Indicates if a commit has already occurred in this session.
+ */
+ readonly attribute boolean isListCommitted;
+
+ /**
+ * The maximum number of jump list items the current desktop can support.
+ */
+ readonly attribute short maxListItems;
+
+ /**
+ * Initializes a jump list build and returns a list of items the user removed
+ * since the last time a jump list was committed. Removed items can become state
+ * after initListBuild is called, lists should be built in single-shot fasion.
+ *
+ * @param removedItems
+ * A list of items that were removed by the user since the last commit.
+ *
+ * @returns true if the operation completed successfully.
+ */
+ boolean initListBuild(in nsIMutableArray removedItems);
+
+ /**
+ * Adds a list and if required, a set of items for the list.
+ *
+ * @param aCatType
+ * The type of list to add.
+ * @param items
+ * An array of nsIJumpListItem items to add to the list.
+ * @param catName
+ * For custom lists, the title of the list.
+ *
+ * @returns true if the operation completed successfully.
+ *
+ * @throw NS_ERROR_INVALID_ARG if incorrect parameters are passed for
+ * a particular category or item type.
+ * @throw NS_ERROR_ILLEGAL_VALUE if an item is added that was removed
+ * since the last commit.
+ * @throw NS_ERROR_UNEXPECTED on internal errors.
+ */
+ boolean addListToBuild(in short aCatType, [optional] in nsIArray items, [optional] in AString catName);
+
+ /**
+ * Aborts and clears the current jump list build.
+ */
+ void abortListBuild();
+
+ /**
+ * Commits the current jump list build to the Taskbar.
+ *
+ * @returns true if the operation completed successfully.
+ */
+ boolean commitListBuild();
+
+ /**
+ * Deletes any currently applied taskbar jump list for this application.
+ * Common uses would be the enabling of a privacy mode and uninstallation.
+ *
+ * @returns true if the operation completed successfully.
+ *
+ * @throw NS_ERROR_UNEXPECTED on internal errors.
+ */
+ boolean deleteActiveList();
+};