* todos.el (todos-modes-set-2): Restore point after finding start

[bpt/emacs.git] / lisp / calendar / ChangeLog

2013-05-13  Stephen Berman  <stephen.berman@gmx.net>

	* todos.el (todos-modes-set-2): Restore point after finding start
	and end of hl-line-range-function.

2013-05-13  Stephen Berman  <stephen.berman@gmx.net>

	* todos.el: Fixes for item marking and marked items.
	(todos-toggle-mark-item): Make no-op if point is not on an item.
	Toggle mark even if point is not at start of item.
	(todos-item-done): Signal an error if a done item is marked.
	Process marked todo items even if point is in done items section.

2013-05-11  Stephen Berman  <stephen.berman@gmx.net>

	* todos.el (todos-item-undone): Remove item highlighting when user
	quits before deciding whether to omit comment.  Fix misplaced
	closing paren.  Change two uses of `if' to `when'.

2013-05-10  Stephen Berman  <stephen.berman@gmx.net>

	* todos.el: Rename numerous commands and defcustoms and adjust all
	uses, change numerous key bindings, make some basic commands
	noninteractive and use them to define the commands, unify
	archiving commands.
	(todos-directory): Rename from todos-files-directory.
	(todos-print-buffer-function): Rename from todos-print-function.
	(todos-number-prefix): Rename from todos-number-priorities.
	(todos-top-priorities-overrides): Rename from todos-priorities-rules.
	(todos-top-priorities): Rename from todos-show-priorities.
	(todos-insertion-command-name, todos-insertion-key-bindings):
	Use "todos-insert-item-".
	(todos-key-bindings, todos-archive-mode-map)
	(todos-categories-mode-map, todos-filtered-items-mode-map):
	Adjust to renamed commands, make bindings more systematic,
	reorder entries.
	(todos-show-categories-table): Rename from todos-display-categories.
	(todos-sort-categories-alphabetically-or-by-priority): Rename from
	todos-display-categories-alphabetically-or-by-priority.
	(todos-sort-categories-by-todo): Rename from
	todos-display-categories-sorted-by-todo.
	(todos-sort-categories-by-diary): Rename from
	todos-display-categories-sorted-by-diary.
	(todos-sort-categories-by-done): Rename from
	todos-display-categories-sorted-by-done.
	(todos-sort-categories-by-archived): Rename from
	todos-display-categories-sorted-by-archived.
	(todos-print-buffer): Rename function from todos-print.
	(todos-print-buffer-to-file): Rename from todos-print-to-file.
	(todos-go-to-source-item): Rename from todos-jump-to-item.
	(todos-forward-item, todos-backward-item): Remove interactive form
	and move most of doc string and prefix argument error checking to...
	(todos-next-item, todos-previous-item): ...these new commands,
	which use the preceding functions.
	(todos-next-button): Rename from todos-forward-button.
	(todos-previous-button): Rename from todos-backward-button.
	(todos-toggle-prefix-numbers): Rename from
	todos-hide-show-item-numbering.
	(todos-toggle-view-done-items): Rename from todos-hide-show-done-items.
	(todos-toggle-view-done-only): Rename from todos-show-done-only.
	(todos-toggle-item-highlighting): Rename from todos-highlight-item.
	(todos-toggle-item-header): Rename from todos-hide-show-date-time.
	(todos-toggle-mark-item): Rename from todos-mark-unmark-item.
	(todos-filter-top-priorities): Rename from todos-top-priorities.
	(todos-filter-top-priorities-multifile): Rename from
	todos-top-priorities-multifile.
	(todos-filter-diary-items): Rename from todos-diary-items.
	(todos-filter-diary-items-multifile): Rename from
	todos-diary-items-multifile.
	(todos-filter-regexp-items): Rename from todos-regexp-items.
	(todos-filter-regexp-items-multifile): Rename from
	todos-regexp-items-multifile.
	(todos-insert-item-1): Remove interactive form, since
	todos-insert-item is generated like other item insertion commands.
	(todos-edit-file): Rename from todos-edit-multiline.
	(todos-item-undone): Rename from todos-item-undo.
	(todos-archive-done-item): Add raw prefix spec to interactive form
	and use it to test for archiving all done items in category;
	reorder tests in function body accordingly.
	(todos-archive-category-done-items): Remove.

2013-04-27  Stephen Berman  <stephen.berman@gmx.net>

	* todos.el (todos-edit-multiline-item): Make a no-op when point is
	not on an item.

2013-04-24  Stephen Berman  <stephen.berman@gmx.net>

	* todos.el (todos-check-format): Add check of well-formedness of
	categories sexp.  If it is well-formed but differs from
	todos-categories, do not signal an error but display a message.

2013-04-21  Stephen Berman  <stephen.berman@gmx.net>

	* todos.el: Fixes and improvements related to item relocation.
	(todos-category-completions): On ensuring proper category display,
	if done items in category are visible, keep them visible.
	(todos-set-item-priority): Keep top of category in view while
	setting priority.
	(todos-move-item): Restore prevention of moving within the same
	category.  Move done items to top, not end, of done items section.
	When user quits before setting priority, make sure to return to
	starting file.
	(todos-item-undo): Partly reimplement along lines of
	todos-move-item, adding highlighting of single item as undo
	target, setting priority of multiple undone items, improving
	handling of quitting before setting priority.
	(todos-unarchive-items): Restore items to top, not end, of
	category's done section.

2013-04-19  Stephen Berman  <stephen.berman@gmx.net>

	* todos.el: Extend and improve item filtering and handling of
	saved files of filtered items.
	(todos-show-first): Add choices for diary and regexp items.
	(todos-absolute-file-name): Handle file names for diary and regexp
	items.
	(todos-filter-items): New function abstracted from item filtering
	commands, with handling of saved files of diary and regexp items.
	(todos-filter-items-1): Rename from todos-filter-items.
	(todos-filtered-buffer-name): Remove, since functionality is now
	incorporated into new function todos-filter-items.
	(todos-filtered-items-buffer, todos-top-priorities-buffer)
	(todos-diary-items-buffer, todos-regexp-items-buffer):
	Make defconsts instead of defcustoms.
	(todos-find-item): Restrict calculation and comparison of
	priorities to top priority items, in order to handle diary and
	regexp items.
	(todos-check-filtered-items-file): Rename from
	todos-check-top-priorities and adjust message and callers.
	(todos-filter-items-filename): Rename from
	todos-top-priorities-filename, adjusting caller and extending to
	files of filtered diary and regexp items.
	(todos-save-filtered-items-buffer): Rename from
	todos-save-top-priorities-buffer and adjust caller and uses.  Use
	write-file instead of write-region and use existing file name if
	previously saved.
	(todos-show): Handle initially displaying saved file of filtered
	diary or regexp items.
	(todos-top-priorities, todos-top-priorities-multifile)
	(todos-diary-items, todos-diary-items-multifile)
	(todos-regexp-items, todos-regexp-items-multifile): Use new
	function todos-filter-items.
	(auto-mode-alist): Extend regexp for files assigned to
	todos-filtered-items-mode to handle saved diary and regexp items.

2013-03-17  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el (todos-insert-item): Fix mistake in logic of
	here insertion from last change, and ensure category is set when
	command is called from outside Todos buffer.

2013-03-15  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el: Item unarchiving fixes and improvements.
	(todos-archive-mode-map): Add bindings for item and category
	marking/unmarking; make todos-display-categories binding same as
	in Todos mode; remove todos-unarchive-category binding.
	(todos-unarchive-category): Remove.
	(todos-unarchive-items): Fix handling of marked items.  Remove
	code for unarchiving whole category, since that is covered by
	unarchiving marked items.  Handle unarchiving items to a category
	that had been deleted from the todo file by re-adding the
	category.  Use todos-category-select to display restored items,
	not todos-show.  Remove obsolete or superfluous code.

2013-03-15  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el (todos-reset-prefix): Don't remove overlays,
	since it's superfluous and also wrongly removes items marks.
	(todos-category-completions): Select current category on visiting
	file, to ensure category is properly displayed if user switches to
	file via a non-Todos command.
	(todos-mark-category): Make implementation cleaner.
	(todos-unmark-category): Improve implementation.  Get overlay
	property only when there is an overlay.

2013-03-14  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el (todos-insert-item): Fix last change to make
	sure calling insertion "here" from outside goal todo items section
	gives new item top priority.  With priority insertion, if user
	cancels before setting priority, restore display.
	(todos-find-item): Restore narrowing after searching.
	(todos-item-done): Allow adding (same) comment to marked items.
	Don't add empty comment to done item.

2013-03-13  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el (todos-quit): If quitting
	todos-filtered-items-mode makes todos-mode current, don't call
	todos-show, which (here wrongly) prompts for a new Todos file.
	(todos-delete-category): Fix incorrect quotation mark.
	(todos-set-item-priority): Make prefix argument a no-op with
	commands for raising or lowering item priority.  Move mistakenly
	placed right paren to end of defun, where it belongs.

2013-02-25  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el (todos-key-bindings): Add binding for `todos-show'.
	(todos-show): Prompt for which todo file to visit when invoked
	from Todos mode.

2013-02-19  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el: Item insertion and done/undo fixes.
	(todos-insert-item): Maybe set the insertion file to
	todos-global-current-todos-file.  When inserting into a file that
	was not being visited on invoking this command, ensure chosen
	category is properly selected.  Make item inserted "here" the
	first todo item if the command was invoked with point in done
	items section or outside of the current category.
	(todos-item-done): When done items are shown, put cursor on first
	just done item.
	(todos-item-undo): Put cursor on undone item.

2013-02-16  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el: Improve handling of overlays.
	(todos-get-overlay): New function.
	(todos-prefix-overlay): Remove, since subsumed by
	todos-get-overlay, and replace by the latter in callers.
	(todos-reset-prefix): Apply only to buffer visiting Todos files.
	Simplify implementation and use `todos' overlay property.
	(todos-reset-done-separator): Use todos-get-overlay and `todos'
	overlay property.  Fix logic.
	(todos-category-select): Use todos-get-overlay and `todos' overlay
	property.
	(todos-remove-item): Use todos-get-overlay.  Correct obsolete code.
	(todos-prefix-overlays): Use todos-top-priority face also for
	non-numerical prefix of top priority items.  Add `todos' overlay
	property.
	(todos-hide-show-date-time): Simplify, using todos-get-overlay and
	`todos' overlay property.

2013-02-14  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el (todos-edit-multiline, todos-edit-quit):
	Revert buffer renaming.

2013-02-11  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el (todos-edit-quit): On quitting file editing,
	rename buffer back to current Todos file.  After selecting
	category, put point at top instead of recentering.

2013-02-08  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el (todos-edit-multiline-item): Revert to using
	indirect buffer, which makes it easier to return to Todos mode.
	(todos-edit-quit): Don't delete and reinsert items that don't need
	indenting.  Revert to just killing buffer on quitting single item
	editing.  On quitting file editing, select nearest category.

2013-02-07  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el: Bug fixes and improvements to item editing
	and insertion.
	(todos-check-format): Compare current value of todos-categories
	with actual categories sexp.
	(todos-repair-categories-sexp): Add warning to doc string about
	category order getting restored to list element order.
	(todos-mode-external-set): When todos-categories is nil, as in
	Todos Edit mode, set it by reading actual categories sexp.
	(todos-edit-mode): Make buffer writeable.
	(todos-done-item-section-p): New function.
	(todos-insert-item): Use it as part of preventing insertion here
	in done items section.  Move check for display of done items only
	to just before setting new item's priority, and if cancelled after
	toggling to todo items, restore display of done items.
	(todos-edit-multiline-item): Don't base on todos-edit-multiline
	but just narrow and change mode.
	(todos-edit-multiline): Don't make indirect buffer but just widen
	and change mode; also remove overlays.
	(todos-edit-quit): Restore Todos mode and category display; when
	quitting multiline item editing, ensure items above edited item
	are visible in window if possible.
	(todos-done-item-add-edit-or-delete-comment): If user moved point
	during editing, make sure it moves back to edited item before
	returning.

2013-02-05  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el (todos-reset-done-separator-string):
	Complete the implementation.
	(todos-hide-show-done-items): If start of done items sections is
	below the bottom of the window, make it visible.
	(todos-insert-item): Allow inserting item here to work outside of
	the current category, but then at top of category.  After checking
	whether only done items are shown, restore point to ensure
	inserting item here works correctly.
	(todos-set-item-priority): Delete leftover right paren at end.

2013-02-04  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el: Bug fixes involving or displaying done items.
	(todos-done-separator): Make length of long separator one less
	than window-width, in order to avoid following empty line.
	(todos-forward-item, todos-backward-item): Make empty line below
	last todo item accessible only by invoking without a numerical
	prefix argument and make the latter invocations move only to items.
	(todos-insert-item): Set todos-current-todos-file after selecting
	buffer, in order not to set global value.  If only done items are
	shown when this command is invoked, toggle to show todo items to
	avoid insertion into done items section.  When done items are
	shown, protect from cancelling before setting item priority: this
	also needs recentering to display all items.
	(todos-set-item-priority): Only call on (not done) todo items.
	Check that done items are visible not because file is widened.
	Use only `any' argument of called-interactively-p.  Make sure that
	giving an undone item lowest priority restores it to the todo
	section.
	(todos-item-done): If done items are visible on invoking this
	command, keep them visible afterwards.  Stop looking for marked
	items on reaching the empty line below the last todo item.

2013-02-02  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el: Several small fixes and improvements.
	(todos-done-separator-string): Change default value.
	(todos-update-categories-sexp): Remove unnecessary and misquided
	setq of todos-default-todos-file.  Use delete-region instead of
	kill-region to avoid polluting kill-ring.
	(todos-unload-hook): Remove (was not used).
	(todos-edit-multiline): Don't generate new edit buffer name on
	each invocation---that can cause confusion due to indirect buffer.
	(todos-edit-quit): Ensure lines in edit buffer that follow hard
	newlines are indented in the file to conform to diary format.
	(todos-set-item-priority): If done items in category are visible,
	keep them visible.

2013-01-30  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el: Fix done separator overlay bug.  Remove most
	FIXME comments.
	(todos-reset-and-enable-done-separator): Remove commented out
	workaround for done separator overlay bug; fix doc string.
	(todos-reset-done-separator): Delete old overlay after adding new
	overlay to fix done separator overlay bug; improve implementation.
	(todos-prefix-overlays): Improve first line of doc string.

2013-01-29  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el: Improve item marking and handling of marked items.
	(todos-prefix): Add validator to ensure value differs from that of
	todos-item-mark.
	(todos-item-mark): New defcustom.
	(todos-prefix-overlay): New function.
	(todos-marked-item-p): Use it.  Adapt implementation to new
	handling of marked items.
	(todos-insert-with-overlays): When inserting pushes down a marked
	item, move its prefix overlay.
	(todos-prefix-overlays): Add overlay even when prefix is empty string,
	otherwise item marking fails.  Improve handling of marked items.
	(todos-mark-unmark-item): Adapt to new handling of marked items
	and simplify by removing marking of all items in category.
	(todos-mark-category): Adapt to new handling of marked items and
	don't use todos-mark-unmark-item.
	(todos-unmark-category): Adapt to new handling of marked items.
	(todos-delete-item): Remove obsolete handling of marked items and
	useless restoration of point.
	(todos-set-item-priority): Use new handling of marked items.
	(todos-move-item, todos-item-done, todos-item-undo)
	(todos-archive-done-item): Remove obsolete handling of marked items.

2013-01-25  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el: Improve definitions and use of some faces.
	(todos-top-priority): Use current definition of font-lock-constant-face.
	(todos-diary-expired): Make default value contrast more with
	default value of todos-date face.
	(todos-nondiary, todos-category-string): New faces.
	(todos-nondiary-face, todos-category-string-face): Corresponding
	new variables.
	(todos-done, todos-comment): Switch default values to go better
	with default value of todos-date face.
	(todos-done-sep): Change default value.
	(todos-category-string-matcher-1)
	(todos-category-string-matcher-2): Improve doc string.
	(todos-font-lock-keywords): Use todos-nondiary-face and
	todos-category-string-face.
	(todos-done-separator): Propertize string with todos-done-sep face.
	(todos-filtered-items-mode): Fix typo.

2013-01-23  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el: Improve handling of saved top priorities items.
	(todos-find-item): Find done items and items whose priority has
	changed or whose text was truncated or augmented; add doc string.
	(todos-check-top-priorities): Highlight each item that is not up
	to date.
	(todos-jump-to-item): Jump to items whose priority has changed or
	whose text was truncated or augmented.

2013-01-22  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el: Revise handling of initial display and extend
	to top priorities file.
	(todos-display-categories-first): Remove, replacing by this:
	(todos-show-first): New defcustom.
	(todos-first-visit): Remove, replacing by this:
	(todos-visited): New variable.
	(todos-absolute-file-name): Extend possible values of optional
	argument to take top priorities files into account.
	(todos-modes-set-3, todos-mode): Remove use of todos-first-visit.
	(todos-mode-external-set): Call find-file-noselect instead of
	find-buffer-visiting, since the latter may fail.
	(todos-show): Revise handling of initial display using
	todos-show-first and todos-visited and extend to top priorities
	file.
	(todos-quit): Adapt to new handling of initial display.

2013-01-14  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el: Implement saving top priority items buffers,
	improve implementation of item filtering commands and
	infrastucture, and fix two bugs.
	(todos-prefix-overlays): Use todos-top-priority face only in Todos
	mode.
	(todos-multiple-filter-files): Get file-truename of Todos file.
	(todos-filter-items): Pass a list of files from the caller instead
	of building it here, and move handling of cancelled file selection
	dialog to callers.  Correct omission of file-wide default number
	of top priorities.
	(todos-filtered-buffer-name): Treat file-list argument only as a list.
	(todos-find-item, todos-check-top-priorities)
	(todos-top-priorities-filename)
	(todos-save-top-priorities-buffer): New functions.
	(todos-save): Use todos-save-top-priorities-buffer.
	(todos-jump-to-item): Refactor and use todos-find-item.
	(todos-top-priorities): Simplify semantics of prefix argument.
	Check if top priorities file exists and if so, visit it, reporting
	whether it is up to date.  Add optional argument and use it to
	handle multiple files.
	(todos-diary-items, todos-regexp-items): Add optional argument and
	use it to handle multiple files.
	(todos-top-priorities-multifile, todos-diary-items-multifile)
	(todos-regexp-items-multifile): Refactor, using corresponding
	non-multifile command.
	(auto-mode-alist): Add pattern for top priorities files to visit
	these in Todos Filtered Items mode.

2013-01-08  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el: Fix tabular alignment in Todos Categories mode.
	(todos-adjusted-category-label-length): New function.
	(todos-padded-string): Use it.

2013-01-08  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el (todos-move-item): Allow moving done items to
	done section of another category.

2013-01-06  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el: Display numerical priority string of top
	priority items in category in a distinctive face.
	(todos-prefix-string): Make doc string more precise.
	(todos-top-priority): New defface.
	(todos-done, todos-done-sep): Use more compact face definition
	\(taken from font-lock.el).
	(todos-comment): Give a complete face definition, instead of
	inheriting from todos-done.
	(todos-font-lock-keywords): Use todos-comment-face for
	todos-comment-string-matcher.
	(todos-prefix-overlays): Use todos-top-priority as the face
	property of top priority items; don't condition reapplying item
	prefix overlay on whether the string changed, since that prevents
	updating display after changing number of top priorities.
	(todos-set-top-priorities): Call todos-prefix-overlays to update
	display.

2013-01-04  Stephen Berman  <Stephen.Berman@rub.de>

	* calendar/todos.el (todos-reset-global-current-todos-file)
	(todos-display-categories-1): Use absolute name of
	todos-default-todos-file.

2013-01-04  Stephen Berman  <Stephen.Berman@rub.de>

	* calendar/todos.el (todos-insert-item): Fix copy and paste error
	from previous change.

2013-01-03  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el: Implement extended category completions.
	(todos-default-todos-file): Change default value to correct custom
	type.
	(todos-category-completions-files): New defcustom.
	(todos-reevaluate-category-completions-files-defcustom)
	(todos-absolute-file-name, todos-category-completions): New defuns.
	(todos-reevaluate-filelist-defcustoms):
	Add todos-category-completions-files and
	todos-reevaluate-category-completions-files-defcustom.
	(todos-allcats-file, todos-all-categories-alist)
	(todos-jump-to-category-other-file, todos-jump-to-any-category)
	(todos-move-item-to-file): Remove (todos-all-categories-alist both
	as defvar and as defun).
	(todos-read-category): Rewrite using extended category completions
	and better handling of completion against existing or non-existing
	categories.
	(todos-validate-name): Correct doc string; use local instead of
	dynamic variables in function body.
	(todos-insert-category-line): Adjust use of todos-jump-to-category
	to new argument list.
	(todos-key-bindings, todos-menu): Delete entries for removed
	commands.
	(todos-show): Get absolute name of todos-default-todos-file;
	add `nowarn' argument to find-file-noselect; adjust use of
	todos-add-category to new argument list.
	(todos-jump-to-category): Rewrite using extended category
	completions; reverse argument list, adapting FILE argument to new
	completion mechanism; add autoload cookie; call todos-show if
	there are no Todos files.
	(todos-add-category): Rewrite using extended category completions;
	add FILE argument to accommodate new completion mechanism.
	(todos-merge-category): Adapt to extended category completions,
	adding prefix argument.
	(todos-insert-item): Adapt to extended category completions; use
	todos-read-category instead of todos-jump-to-category in prefix
	argument calls; call todos-show if there are no Todos files; if
	item is inserted at end of category, recenter to ensure the items
	above it are displayed in the window.
	(todos-move-item): Adapt to extended category completions, making
	argument prefix argument; allow moving within category (for the
	sake of code simplification); add `nowarn' argument to
	find-file-noselect.
	(todos-archive-done-item): Prevent error when attempting to
	archive not-done todo item; adjust use of todos-add-category to
	new argument list.

2012-12-15  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el (todos-archive-done-item): Fix archiving of
	all done items in a category and resulting display of todo file.

2012-12-14  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el (todos-priorities-rules): Fix customization
	type to prevent mismatch error.
	(todos-set-top-priorities): Fix rule construction; fix input check;
	improve prompt.

2012-12-14  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el (todos-insert-item): If user exits Calendar
	before choosing a date, cancel item insertion.
	(todos-set-date-from-calendar): If user exits Calendar before
	choosing a date, clean up properly.

2012-12-12  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el: Extend and improve handling of item editing,
	especially of date/time header.
	(todos-month-name-array, todos-month-abbrev-array): New defconsts.
	(todos-date-pattern): Use explicitly numbered groups.
	(todos-read-date): Optionally read and return just one of the date
	string components year, month or monthname, day.
	(todos-key-bindings): Add bindings for new item header editing
	commands.
	(todos-edit-item): Exclude date/time header from minibuffer by
	default; include it by passing a prefix argument.
	(todos-edit-item-header-1): New function containing the guts of
	the commands for editing item date/time headers.
	(todos-edit-item-header): Use it.  Condition editing of time
	string on value of `todos-always-add-time-string'.
	(todos-edit-item-date-from-calendar): Use todos-edit-item-header-1.
	(todos-edit-item-date-to-today): Rename from
	todos-edit-item-date-is-today and use todos-edit-item-header-1.
	(todos-edit-item-date): Remove.
	(todos-edit-item-date-day-name, todos-edit-item-date-year)
	(todos-edit-item-date-month, todos-edit-item-date-day): New commands.

2012-12-02  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el (todos-show): Fix a comment.
	(todos-add-category): Prompt for a new category if passed category
	is the empty string, not nil.

2012-11-26  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el (todos-make-categories-list)
	(todos-convert-legacy-files, todos-jump-to-item)
	(todos-move-category, todos-merge-category)
	(todos-archive-done-item, todos-unarchive-items): Include end of
	line in regex searches for beginning of category, in order not to
	get a category whose name contains the searched for category name.

2012-11-15  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el (todos-forward-category): Fix typo.

2012-10-30  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el (todos-define-insertion-command):
	Let generated insertion commands accept a prefix argument.

2012-10-08  Stephen Berman  <Stephen.Berman@rub.de>

	* calendar/todos.el (todos-move-item): If user quits before
	completing movement, restore display of initial category; if item
	is moved to end of target category, make sure the items above it
	are displayed in the window.

2012-10-08  Stephen Berman  <stephen.berman@gmx.net>

	* calendar/todos.el: Fixes to todos-move-item and some of its
	subroutines.
	(todos-move-item): When there are marked items, point need not be
	on an item; remove obsolete use of todos-add-category, since this
	is now already done in todos-read-category; fix typo.
	(todos-diary-item-p): Exclude empty lines.
	(todos-read-category): Restore point and narrowing after adding
	new category, to avoid moving to beginning of file when moving
	marked items to a new category.
	(todos-set-item-priority): Prompt for priority only when the
	category has at least one todo item; only use non-nil priority to
	calculate insertion location.
	(todos-read-category): Don't reset todos-categories when a new
	category is added due to todos-move-item or todos-jump-to-item.

2012-09-24  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2012-07-14 (revision 110020).
	* calendar/todos.el (todos-copy-item): New command.
	(todos-insertion-map): Add key binding for it.

2012-09-24  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2012-07-13 (revision 110019).
	* calendar/todos.el (todos-undo-item-omit-comment): New defcustom.
	(todos-item-undo): Use it.
	(todos-allcats-file, todos-all-categories-alist): New variables.
	(todos-all-categories-alist): New function.
	(todos-jump-to-any-category): New command.
	(todos-move-item): Remove mark overlays from buffer items were
	moved from; update todos-categories-with-marks,

2012-09-24  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2012-06-27 (revision 110018).
	* calendar/todos.el: Further code rearrangement; further new and
	revised comments.
	(todos-reevaluate-filelist-defcustoms): Rename from
	todos-reevaluate-defcustoms and adjust callers.
	(todos-date-pattern, todos-nondiary-start, todos-nondiary-end)
	(todos-date-string-start, todos-done-string-start)
	(todos-item-start): Change from defvar to defconst.
	(todos-set-top-priorities): Use read-number and simplify.
	(todos-insert-item): Check whether date-type argument is a string.
	(todos-set-date-from-calendar): Check whether
	todos-date-from-calendar is a string; simplify cond clause.
	(todos-archive-done-item, todos-unarchive-items):
	Use buffer-substring-no-properties.

2012-09-23  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2012-06-25 (revision 110017).
	* calendar/todos.el (todos-item-undo): Fix restoration on
	cancelling; use buffer-substring-no-properties; comment out code
	removing mark overlay; fix insertion of undone items; display any
	remaining done items.

2012-09-23  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2012-06-24 (revision 110016).
	* calendar/todos.el: Further significant code rearrangement;
	further comment revision.
	(todos-mode-display): New defgroup.
	(todos-prefix, todos-number-priorities)
	(todos-done-separator-string, todos-done-string)
	(todos-comment-string, todos-show-with-done)
	(todos-mode-line-function, todos-skip-archived-categories)
	(todos-highlight-item, todos-wrap-lines)
	(todos-line-wrapping-function): Use it.
	(todos-item-insertion): New defgroup.
	(todos-include-in-diary, todos-diary-nonmarking)
	(todos-nondiary-marker, todos-always-add-time-string)
	(todos-use-only-highlighted-region): Use it.
	(todos-forward-button, todos-backward-button): New commands.
	(todos-categories-mode-map): Use them, replacing forward-button
	and backward-button.
	(todos-merge-category): Fix and improve implementation; handle
	archived items.
	(todos-insert-item, todos-set-date-from-calendar): Handle setting
	date by calling todos-insert-item-from-calendar.
	(todos-delete-item): Fix overlay handling.
	(todos-move-item): Highlight item to be moved.
	(todos-item-undo): Handle marked items.
	(todos-insert-item-from-calendar): Rewrite using
	todos-date-from-calendar.

2012-09-23  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2012-06-21 (revision 110015).
	* calendar/todos.el: Further comment revision.
	(todos-sorted-column): Change default value, also taking tty into
	account.
	(todos-reset-done-separator): Fix faulty variable binding.
	(todos-reset-and-enable-done-separator): Save match data; comment
	out code that causes problems for Edebug.
	(todos-item-start): Handle empty line between todo and done items
	when done items are hidden.
	(todos-read-date): Use a leap year for `*' to allow
	calendar-last-day-of-month to return Feb. 29.
	(todos-archive-mode, todos-edit-mode, todos-categories-mode)
	(todos-filtered-items-mode): Delete faulty parentheses.
	(todos-quit): Save Todos and archive files unconditionally.
	(todos-forward-item): Accept only positive prefix argument.
	(todos-backward-item): Accept only positive prefix argument; don't
	move point to beginning of buffer if it is on the first item.
	(todos-hide-show-date-time): Remove obsolete interactive spec.
	(todos-move-category): Improve prompt string; ensure file moved to
	is different from file moved from.
	(todos-merge-categories): Remove.
	(todos-set-category-priority): New command.
	(todos-raise-category-priority, todos-lower-category-priority):
	Use it to define these commands.
	(todos-set-item-priority): Rewrite and generalize.
	(todos-raise-item-priority, todos-lower-item-priority): Use it to
	define these commands.

2012-09-23  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2012-06-15 (revision 110014).
	* calendar/todos.el (todos-reset-done-separator)
	(todos-reset-and-enable-done-separator): New functions.
	(todos-reset-done-separator-string): Rewrite using
	todos-reset-done-separator for string longer than 1 character.
	(todos-mode): Add todos-reset-and-enable-done-separator to
	window-configuration-change-hook, replacing previous anonymous
	function.
	(todos-unload-hook): And remove it.

2012-09-23  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2012-06-14 (revision 110013).
	* calendar/todos.el (todos-done-separator-string): New defcustom.
	(todos-done-separator): New variable replacing defcustom of the
	same name.
	(todos-reset-done-separator-string, todos-done-separator):
	New functions.
	(todos-mode): Make function added to
	window-configuration-change-hook do a better job of updating the
	done items separator string overlay.
	(todos-unload-hook): Remove it here.
	(todos-item-undo): Fix search for item's end.

2012-09-23  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2012-06-03 (revision 110012).
	* calendar/todos.el: Further comment revision.
	(todos-sorted-column): Change default value.
	(todos-item-start): Handle empty category (needed in
	todos-filter-items).
	(todos-read-date): Don't use calendar-read; make code cleaner.
	(todos-multiple-filter-files): Rename this variable from
	todos-multiple-files and adjust users.
	(todos-multiple-filter-files-widget): Rename from
	todos-multiple-files-widget and adjust users.
	(todos-multiple-filter-files): Rename this function from
	todos-multiple-files and adjust callers.
	(todos-filter-items): Remove unused code.
	(todos-insert-category-line): Add space so highlighting of last
	column is consistent with the others; adjust display of column
	highlighting.
	(todos-menu): Remove obsolete entry.
	(todos-categories-mode-map): Add new bindings.
	(todos-display-categories-alphabetically-or-by-priority): New command.
	(todos-display-categories-sorted-by-todo)
	(todos-display-categories-sorted-by-diary)
	(todos-display-categories-sorted-by-done)
	(todos-display-categories-sorted-by-archived): Restore and fix
	implementation.

2012-09-23  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2012-06-02 (revision 110011).
	* calendar/todos.el: Significant code rearrangement; further
	comment revision.
	(todos-filtered-items-buffer): Rename from todos-filter-buffer and
	adjust users.
	(todos-filtered-buffer-name): Rename from
	todos-special-buffer-name and adjust users.
	(todos-filtered-items-mode-map): Rename from
	todos-filter-items-mode-map and adjust users.
	(todos-mode-external-set): Use todos-categories instead of
	todos-set-categories (and add comment to check if this DTRT).
	(todos-filtered-items-mode): Rename from todos-filter-items-mode
	and adjust users.
	(todos-add-category): Don't call todos-validate-name, since
	todos-read-category does.
	(todos-edit-quit): Use todos-repair-categories-sexp.
	(todos-done-item-add-edit-or-delete-comment): Rename from
	todos-done-item-add-or-edit-comment and adjust users; add optional
	argument to prompt to delete comment.
	(todos-item-undo): Delete done item comment on undoing if user
	confirms.

2012-09-22  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2012-06-02 (revision 110010).
	* calendar/todos.el: Further code rearrangement and comment
	revision.
	(todos-item-start): Handle empty line between todo and done items
	when done items are displayed.
	(todos-key-bindings): Comment out bindings meant only for
	todos-archive-mode.
	(todos-archive-mode-map): Fix typo.
	(todos-archive-mode): Derive from special-mode instead of
	todos-mode to prevent its key bindings from being available here.
	(todos-archive-done-item): Remove obsolete code; fix item count
	updating.
	(todos-unarchive-items): Simplify; fix unarchiving of all items in
	category; fix item count updating; fix typo.

2012-09-22  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2012-06-01 (revision 110009).
	* calendar/todos.el: Further code rearrangement and comment
	revision.
	(todos-add-to-buffer-list, todos-update-buffer-list): New functions.
	(todos-file-buffers): New variable.
	(todos-reset-global-current-todos-file): Use it to simplify
	implementation of this function.
	(todos-filtered): New defgroup.
	(todos-filter-buffer, todos-top-priorities-buffer)
	(todos-diary-items-buffer, todos-regexp-items-buffer)
	(todos-priorities-rules, todos-show-priorities)
	(todos-filter-files, todos-filter-done-items): Use it.
	(todos-skip-archived-categories): Rename from
	todos-ignore-archived-categories and adjust users.
	(todos-display-as-todos-file): Rename from todos-after-find-file
	and adjust callers.
	(todos-reset-highlight-item, todos-mode-external-set)
	(todos-jump-to-category, todos-jump-to-item)
	(todos-raise-category-priority, todos-insert-item)
	(todos-move-item): Use find-file-visiting.
	(todos-make-categories-list): Use file-truename.
	(todos-display-categories-1): Adjust title text for archive files;
	use done label for item counts in archive files.
	(todos-modes-set-3): Add todos-display-as-todos-file to
	find-file-hook.
	(todos-mode): Add todos-add-to-buffer-list to find-file-hook and
	todos-update-buffer-list post-command-hook.
	(todos-unload-hook): And remove them.
	(todos-show): Only when interactively invoked from an archive,
	switch to corresponding Todos file.
	(todos-archive-done-item): Remove obsolete code; fix handling of
	marked items; fix search for existing category; check whether
	archive exists and write to file if not; improve display handling.

2012-09-21  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2012-05-29 (revision 110008).
	* calendar/todos.el: Further comment revision.
	(todos-item-end): Replace use of command todos-forward-item by
	regexp searches using internal variables.
	(todos-raise-category-priority): Improve and comment.
	(todos-insert-item): Fix insertion of empty time string.

2012-09-21  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2012-05-29 (revision 110007).
	* calendar/todos.el (todos-ignore-archived-categories):
	Revert last change; remove :initialize and :set functions; change
	use and change users accordingly.
	(todos-reset-categories, todos-categories-full)
	(todos-truncate-categories-list): Remove.
	(todos-set-categories, todos-update-categories-sexp):
	Use todos-categories instead of todos-categories-full; remove use
	of todos-ignore-archived-categories and
	todos-truncate-categories-list.
	(todos-check-format, todos-repair-categories-sexp):
	Use todos-categories instead of todos-categories-full.
	(todos-read-category): Improve last change.
	(todos-validate-name): Use completing-read.
	(todos-categories-category-number): Rename from
	todos-category-number and adjust users.
	(todos-update-categories-display, todos-mode-external-set)
	(todos-delete-category, todos-move-category, todos-merge-category)
	(todos-unarchive-items): Remove use of todos-categories-full and
	todos-ignore-archived-categories.
	(todos-modes-set-3, todos-add-category): Remove use of
	todos-categories-full.
	(todos-edit-mode): Fix typo.
	(todos-forward-category): Use todos-ignore-archived-categories.

2012-09-21  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2012-05-28 (revision 110006).
	* calendar/todos.el: Doubts about todos-ignore-archived-categories.
	(todos-ignore-archived-categories): Change default value.

2012-09-21  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2012-05-27 (revision 110005).
	* calendar/todos.el: Further comment revision.
	(todos-reset-global-current-todos-file):
	Try to make this not slow down kill-buffer.
	(todos-update-categories-sexp): Handle the case where there is no
	categories sexp yet, i.e. after inserting the first item in the
	file, so todos-display-categories works.
	(todos-read-file-name): Improve implementation.
	(todos-validate-name): Use variable todos-files.
	(todos-category-number): New variable.
	(todos-insert-category-line, todos-update-categories-display)
	(todos-raise-category-priority): Use it.
	(todos-add-file): Remove unused remnant code.

2012-09-21  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2012-05-25 (revision 110004).
	* calendar/todos.el: Further comment revision.
	(todos-set-item-top-priority): New command.
	(todos-reset-global-current-todos-file):
	Use todos-files-function instead of todos-files.
	(todos-read-category): Add optional argument to test whether
	caller adds new category; if so, don't prompt for new category and
	don't restore original todos-categories list.
	(todos-categories-mode-map): Update to renamed commands.
	(todos-filter-items-mode-map): Add binding for new command.
	(todos-mode): Fix typo.
	(todos-show): If called from archive file, show corresponding
	category in Todos file, if it exists.
	(todos-jump-to-category): Remove code to add new category, since
	todos-read-category can do that.
	(todos-add-file): Remove obsolete code; visit new file in selected
	window.
	(todos-add-category): Simplify.
	(todos-rename-category): Use force-mode-line-update instead of
	setting mode-line-buffer-identification.
	(todos-delete-category): Improve logic of prompts; use
	todos-categories-full and check todos-ignore-archived-categories.
	(todos-raise-category-priority, todos-lower-category-priority):
	Rename from todos-{raise,lower}-category and adjust callers.
	(todos-move-category, todos-merge-category):
	Set todos-categories-full; on setting todos-categories check
	todos-ignore-archived-categories.
	(todos-insert-item): Let-bind use-empty-active-region and use
	use-region-p instead of transient-mark-mode.
	(todos-raise-item-priority): Improve implementation.
	(todos-archive-done-item): Rename from
	todos-archive-done-item-or-items and adjust callers; confine to
	Todos mode.
	(todos-unarchive-items): On setting todos-categories check
	todos-ignore-archived-categories.

2012-09-21  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2012-05-23 (revision 110003).
	* calendar/todos.el (todos-key-bindings): Remove binding of
	deleted command.
	(todos-menu): Remove entry of deleted command.
	(todos-show-archive): Fix last change.
	(todos-done-item-add-or-edit-comment): Rename from
	todos-comment-done-item and adjust callers; prompt to edit an
	existing comment.

2012-09-21  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2012-05-22 (revision 110002).
	* calendar/todos.el (todos-set-show-current-file): Rename from
	todos-toggle-show-current-file and adjust callers.
	(todos-number-priorities): Rename from todos-number-prefix and
	adjust users.
	(todos-update-count): Rename from todos-set-count and adjust
	callers.
	(todos-hide-show-item-numbering): Rename from
	todos-toggle-item-numbering and adjust callers.
	(todos-hide-show-done-items): Rename from
	todos-toggle-view-done-items and adjust callers.
	(todos-show-done-only): Rename from todos-toggle-show-done-only.
	(todos-view-archived-items): Comment out.
	(todos-show-archive): Prompt to choose another archive file if
	current Todos file lacks an archive; prompt to visit archive
	anyway when current category has no archived items.

2012-09-21  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2012-05-21 (revision 110001).
	* calendar/todos.el: Further comment revision and code
	rearrangement.
	(todos-item-end): Revert last change.
	(todos-key-bindings, todos-menu, todos-archive-mode-map)
	(todos-filter-items-mode-map): Use renamed commands.
	(todos-hide-show-date-time): Rename from
	todos-toggle-display-date-time.
	(todos-mark-unmark-item): Rename from todos-toggle-mark-item and
	adjust caller.
	(todos-backward-item): Exempt special handling only from
	todos-regexp-items-buffer instead of todos-filter-items-mode.
	(todos-raise-item-priority): Don't allow item reprioritizing in
	Todos filter items mode except for top priority items.

2012-09-21  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2012-05-19 (revision 110000).
	* calendar/todos.el: Add and revise further doc strings and
	comments.
	(todos-filter-function, todos-custom-items)
	(todos-custom-items-multifile): Remove.
	(todos-filter-done-items): New defcustom.
	(todos-item-end, todos-backward-item): Handle todos-filter-items-mode.
	(todos-filter-items): Check return value of caller first; tag
	archived items for todos-jump-to-item; delete categories sexp
	before processing filter; check todos-filter-done-items for
	whether to leave done items; remove custom filter; fix regexp for
	file and category tags; don't invoke buffer fontification.
	(powerset-recursive): Fix typo.
	(todos-key-bindings): Remove unused bindings.
	(todos-top-priorities-multifile, todos-diary-items-multifile)
	(todos-regexp-items-multifile): Use variable todos-multiple-files.
	(todos-jump-to-item): Fix regexp; handle archive tags; take
	todos-filter-done-items into account.
	(todos-insert-item-from-calendar): Relocate to end of file
	together with key-binding as addition to calendar.el.

2012-09-20  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2012-05-17 (revision 109999).
	* calendar/todos.el: Add and revise further doc strings and
	comments; major code rearrangement.
	(todos-merged-files, todos-prompt-merged-files)
	(todos-print-priorities, todos-tmp-buffer-name)
	(todos-top-priorities-widgets, todos-update-merged-files)
	(todos-merged-top-priorities, todos-merged-diary-items)
	(todos-merged-regexp-items, todos-merged-custom-items)
	(todos-raw-mode, todos-change-default-file)
	(todos-toggle-diary-inclusion, todos-toggle-item-diary-nonmarking)
	(todos-toggle-diary-nonmarking, todos-validate-category-name):
	Remove.
	(todos-category-string-matcher): Comment out.
	(todos-categories): New defgroup.
	(todos-initial-file, todos-filter-buffer)
	(todos-top-priorities-buffer, todos-categories-category-label)
	(todos-diary-items-buffer, todos-regexp-items-buffer)
	(todos-custom-items-buffer, todos-filter-files)
	(todos-highlight-item, todos-todo-mode-date-time-regexp):
	New defcustoms.
	(todos-diary-expired): New face.
	(todos-print-buffer, todos-multiple-files)
	(todos-multiple-files-widget, todos-key-bindings): New variables.
	(todos-short-file-name, todos-reevaluate-default-file-defcustom)
	(todos-special-buffer-name)
	(todos-reevaluate-filter-files-defcustom)
	(todos-reset-highlight-item, todos-reevaluate-defcustoms)
	(todos-nondiary-marker-matcher, todos-diary-nonmarking-matcher)
	(todos-diary-expired-matcher, todos-category-string-matcher-1)
	(todos-category-string-matcher-2, todos-repair-categories-sexp)
	(todos-validate-name, todos-multiple-files)
	(todos-display-categories-1, todos-update-categories-display)
	(todos-modes-set-3, todos-mode-external-set): New functions.
	(todos-set-top-priorities-in-file)
	(todos-set-top-priorities-in-category)
	(todos-top-priorities-multifile, todos-diary-items-multifile)
	(todos-regexp-items-multifile, todos-custom-items-multifile)
	(todos-convert-legacy-files, todos-jump-to-item)
	(todos-edit-multiline-item, todos-edit-item-date-from-calendar)
	(todos-edit-item-diary-inclusion)
	(todos-edit-category-diary-inclusion)
	(todos-edit-item-diary-nonmarking)
	(todos-edit-category-diary-nonmarking): New commands.
	(todos, todos-faces): Update :version.
	(todos-done-separator, todos-completion-ignore-case):
	Change default value.
	(todos-done-separator): Change :set function.
	(todos-indent-to-here): Add :validate function to :type.
	(todos-prefix-string, todos-mark, todos-button)
	(todos-sorted-column, todos-archived-only, todos-search)
	(todos-done, todos-done-sep): Provide full face definitions
	instead of inheriting.
	(todos-edit-buffer, todos-categories-buffer): Change from
	defcustom to defvar.
	(todos-category-beg, todos-category-done): Change from defvar to
	defconst.
	(todos-files): Check if todos-files-directory exists.
	(todos-default-todos-file, todos-mode-line-control, todos-print):
	Use todos-short-file-name.
	(todos-font-lock-keywords): Use todos-nondiary-marker-matcher,
	todos-diary-nonmarking-matcher, todos-category-string-matcher-1,
	todos-category-string-matcher-2, todos-diary-expired-matcher.
	(todos-category-select): Use todos-done-string-start, and
	condition search on todos-show-with-done; don't make display
	overlay for done items separator string if there already is one;
	use todos-highlight-item, require hl-line and activate
	hl-line-mode here in order to avoid a hang if done in todos-mode
	or the mode hook.
	(todos-update-categories-sexp): Use todos-categories-full if set,
	otherwise todos-categories.
	(todos-make-categories-list): Don't test for archive file when
	processing a legacy todo-mode file.
	(todos-check-format): Add check for todos-categories sexp.
	(todos-diary-item-p): Use todos-nondiary-start instead of
	todos-date-pattern.
	(todos-marked-item-p): Rename from todos-item-marked-p.
	(todos-read-file-name): Don't accept empty name; validate.
	(todos-read-category): Validate new name before prompting whether
	to add new category; force quit if user answers no.
	(todos-filter-items): Improve implementation.
	(todos-set-top-priorities): Rewrite as a noninteractive function
	using minibuffer input instead of widgets.
	(todos-insert-sort-button): Call todos-display-sorted with
	argument nil to display categories in numerical order, instead of
	calling todos-display-categories.
	(powerset-recursive): Borrow and slightly reformulate the (GDFL'd)
	Common Lisp powerset function at
	http://rosettacode.org/wiki/Power_set#Common_Lisp.
	(powerset-bitwise): Implement in Emacs Lisp the (GDFL'd) C
	powerset function at http://rosettacode.org/wiki/Power_set#C.
	(todos-powerset): Defalias to powerset-bitwise.
	(todos-mode-map): Generate from todos-key-bindings instead of
	listing each key definition.
	(todos-categories-mode-map): Add two bindings.
	(todos-filter-items-mode-map): Add some bindings, remove others.
	(todos-mode): Derive from special-mode; use todos-modes-set-3; add
	function setting todos-done-separator to
	window-configuration-change-hook.
	(todos-unload-hook): Remove function setting todos-done-separator
	from window-configuration-change-hook.
	(todos-archive-mode): Derive from todos-mode; use todos-modes-set-3.
	(todos-edit-mode): Derive from text-mode; use todos-mode-external-set.
	(todos-categories-mode): Derive from special-mode; use
	todos-mode-external-set.
	(todos-filter-items-mode): Derive from special-mode.
	(todos-quit): Save archive file if it hasn't yet been saved.
	(todos-display-categories): Delegate all functionality to
	todos-display-categories-1 and todos-update-categories-display.
	(todos-toggle-view-done-items): Improve implementation.
	(todos-highlight-item): Require hl-line.
	(todos-toggle-display-date-time): Remove argument and make it
	apply only to whole file.
	(todos-top-priorities, todos-diary-items, todos-regexp-items)
	(todos-custom-items): Use todos-special-buffer-name.
	(todos-add-file): Use todos-short-file-name and
	todos-reevaluate-defcustoms; remove validation, since it's now
	done in todos-read-file-name.
	(todos-add-category): Also update todos-categories-full if non-nil.
	(todos-delete-category): Delete file after confirmation if only
	category is deleted.
	(todos-move-category): Use todos-short-file-name and
	todos-reevaluate-defcustoms.
	(todos-insert-item): Fix getting date from the calendar and
	insertion of time string.
	(todos-set-date-from-calendar): Enter calendar buffer, suppressing
	display of diary entries.
	(todos-edit-multiline): Add optional argument to restrict editing
	buffer to current item, otherwise make entire buffer (i.e. whole
	file) editable.
	(todos-edit-quit): When whole file is editable, check file format
	validity before killing buffer, and if valid, recalculate
	categories sexp to be safe.
	(todos-edit-item-header): Allow choosing date from calendar.
	(todos-item-done): Handle marked items.

2012-09-19  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2011-12-03 (revision 109998).
	* calendar/todos.el (todos-item-start): Restore commented out code
	to prevent wrongly moving point in widened buffer.

2012-09-19  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2011-12-02 (revision 109997).
	* calendar/todos.el: Remove old commentary from todo-mode.el; add
	and revise further doc strings and comments; require cl.el at
	compile time for remove-duplicates; use function powerset from
	http://rosettacode.org/wiki/Power_set#Common_Lisp (GFDL); further
	code rearrangement.  Add adapted version of diary-goto-entry as comment.
	(todos-file-top, todos-archived-categories-buffer)
	(todos-save-top-priorities-too, todos-toggle-item-diary-inclusion)
	(todos-save-top-priorities, todos-reset-separator)
	(todos-switch-todos-file, todos-item-string-start, todos-counts)
	(todos-string-count-lines, todos-string-multiline-p)
	(todos-display-categories-alphabetically): Remove.
	(todos-insert-item-ask-date, todos-insert-item-ask-date-time)
	(todos-insert-item-ask-date-time-for-diary)
	(todos-insert-item-ask-date-time-for-diary-here)
	(todos-insert-item-ask-date-time-here)
	(todos-insert-item-ask-date-maybe-notime)
	(todos-insert-item-ask-date-maybe-notime-for-diary)
	(todos-insert-item-ask-date-maybe-notime-for-diary-here)
	(todos-insert-item-ask-date-maybe-notime-here)
	(todos-insert-item-ask-date-for-diary)
	(todos-insert-item-ask-date-for-diary-here)
	(todos-insert-item-ask-date-here, todos-insert-item-ask-dayname)
	(todos-insert-item-ask-dayname-time)
	(todos-insert-item-ask-dayname-time-for-diary)
	(todos-insert-item-ask-dayname-time-for-diary-here)
	(todos-insert-item-ask-dayname-time-here)
	(todos-insert-item-ask-dayname-maybe-notime)
	(todos-insert-item-ask-dayname-maybe-notime-for-diary)
	(todos-insert-item-ask-dayname-maybe-notime-for-diary-here)
	(todos-insert-item-ask-dayname-maybe-notime-here)
	(todos-insert-item-ask-dayname-for-diary)
	(todos-insert-item-ask-dayname-for-diary-here)
	(todos-insert-item-ask-dayname-here, todos-insert-item-ask-time)
	(todos-insert-item-ask-time-for-diary)
	(todos-insert-item-ask-time-for-diary-here)
	(todos-insert-item-ask-time-here)
	(todos-insert-item-maybe-notime)
	(todos-insert-item-maybe-notime-for-diary)
	(todos-insert-item-maybe-notime-for-diary-here)
	(todos-insert-item-maybe-notime-here)
	(todos-insert-item-for-diary, todos-insert-item-for-diary-here)
	(todos-insert-item-here): Remove; all of these are now generated
	on loading (some with the same name, most with other names.)
	(todos-item-counts, todos-display-categories-alphabetically)
	(todos-display-categories-sorted-by-todo)
	(todos-display-categories-sorted-by-diary)
	(todos-display-categories-sorted-by-done)
	(todos-display-categories-sorted-by-archived): Comment out.
	(todos-comment-string, todos-mode-line-function)
	(todos-filter-function, todos-priorities-rules)
	(todos-visit-files-commands, todos-categories-totals-label)
	(todos-use-only-highlighted-region, todos-diary-nonmarking):
	New defcustoms.
	(todos-mark, todos-comment): New faces.
	(todos-comment-face): Corresponding new variable.
	(todos-categories-full, todos-global-current-todos-file)
	(todos-first-visit, todos-insertion-commands-args-genlist)
	(todos-insertion-commands-args, todos-insertion-commands-names)
	(todos-insertion-commands, todos-insertion-commands-arg-key-list)
	(todos-top-priorities-widgets, todos-date-from-calendar)
	(todos-item-mark, todos-categories-with-marks): New variables.
	(todos-mode-line-control, todos-reset-global-current-todos-file)
	(todos-gen-arglists, todos-insertion-command-name)
	(todos-insertion-key-bindings, todos-unload-hook)
	(todos-filter-items, todos-set-date-from-calendar)
	(todos-comment-string-matcher, todos-after-find-file)
	(todos-reset-nondiary-marker, todos-reset-done-string)
	(todos-reset-comment-string, todos-show-current-file)
	(todos-item-marked-p, todos-total-item-counts): New functions.
	(todos-define-insertion-command): New macro.
	(todos-toggle-mark-item, todos-mark-category)
	(todos-unmark-category, todos-set-top-priorities)
	(todos-merged-diary-items, todos-regexp-items)
	(todos-merged-regexp-items, todos-custom-items)
	(todos-merged-custom-items, todos-comment-done-item)
	(todos-archive-category-done-items, todos-unarchive-items)
	(todos-print-to-file): New commands.
	(todos-done-separator): Change :set function.
	(todos-done-string): Uncomment :initialize and :set functions.
	(todos-files): Use file-truename.
	(todos-show-current-file): Rename from
	todos-auto-switch-todos-file and change :set function accordingly.
	(todos-font-lock-keywords): Use todos-comment-string-matcher;
	change names of other matcher functions to new *-matcher.
	(todos-category-number): Change initial value.
	(todos-insertion-map): Use todos-insertion-key-bindings to
	generate key definitions.
	(todos-mode-map): Don't suppress digit keys, so they can supply
	prefix arguments; add new and change some existing bindings.
	(todos-archive-mode-map): Change a key binding.
	(todos-categories-mode-map): Comment out a key binding.
	(todos-filter-items-mode-map): Rename from
	todos-top-priorities-mode-map.
	(todos-mode): Make todos-current-todos-file,
	todos-categories-full, todos-categories, todos-first-visit,
	todos-category-number, todos-show-done-only,
	todos-categories-with-marks local variables and set them; add
	todos-show-current-file to pre-command-hook, todos-after-find-file
	to post-command-hook and todos-reset-global-current-todos-file to
	kill-buffer-hook.
	(todos-archive-mode): Make todos-current-todos-file,
	todos-categories and todos-category-number local variables and set
	them; add todos-after-find-file to post-command-hook.
	(todos-raw-mode): New derived major mode.
	(todos-categories-mode): Don't set font-lock-defaults and
	buffer-read-only; make todos-current-todos-file and
	todos-categories local variables and set them.
	(todos-filter-items-mode): Rename from todos-top-priorities-mode-map.
	(todos-quit): Don't reset todos-categories on quitting
	todos-categories-mode; handle quitting todos-filter-items-mode.
	(todos-show): Simplify; when visiting an archive file switch to
	corresponding Todos file; use todos-first-visit.
	(todos-view-archived-items): Simplify; call todos-category-number.
	(todos-show-archive): Rename from todos-switch-to-archive and
	adjust callers; simplify.
	(todos-toggle-display-date-time): Add optional argument to toggle
	display in entire file.
	(todos-top-priorities): Use todos-filter-items, which now contains
	the previous core of this command.
	(todos-merged-top-priorities, todos-diary-items):
	Use todos-filter-items.
	(todos-forward-category): Add optional argument to go to the
	previous category.
	(todos-backward-category): Use todos-forward-category.
	(todos-jump-to-category): Refine implementation.
	(todos-forward-item, todos-backward-item): Fix movement from todo
	to done item and vice versa.
	(todos-add-file): Remove argument and simplify.
	(todos-rename-category): Use todos-current-todos-file and
	todos-mode-line-function; set todos-categories with
	todos-set-categories.
	(todos-delete-category): Ask what to do if category has archived items.
	(todos-raise-category): Ensure modified todos-categories is added
	to file's categories sexp.
	(todos-move-category): Improve implementation, especially handling
	of archived categories.
	(todos-merge-category): Tweak; set item counts.
	(todos-insert-item): Improve handling of various argument values;
	add new argument values to control marking of diary items and to
	use region for item body.
	(todos-insert-item-from-calendar): Use todos-global-current-todos-file.
	(todos-delete-item, todos-edit-item-header): Handle marked items.
	(todos-edit-item): Incorporate functionality of removed
	todos-string-multiline-p.
	(todos-edit-multiline): Use set-window-buffer instead of
	switch-to-buffer.
	(todos-edit-quit): Don't save on quitting; use todos-show instead
	of todos-category-select.
	(todos-raise-item-priority): Add argument to lower priority;
	improve handling of top priority items in todos-filter-items-mode;
	restore marks.
	(todos-lower-item-priority): Use todos-raise-item-priority.
	(todos-set-item-priority): Increment maximum number if item is new.
	(todos-move-item): Handle marked items; delay changing category
	moved from till after movement to avoid restoring if user cancels
	before insertion.
	(todos-item-done): Add optional argument to insert comment; fix
	item counts and update sexp.
	(todos-item-undo): Fix item counts and update.
	(todos-archive-done-item-or-items): Rename from
	todos-archive-done-items; add optional argument to archive all
	items in category; handle marked items.
	(todos-unarchive-category): Use todos-unarchive-items.
	(todos-toggle-diary-inclusion): Incorporate functionality of
	removed todos-toggle-item-diary-inclusion; handle marked items.
	(todos-print): Add optional argument to print to file.
	(todos-done-string-start): Don't use todos-nondiary-start.
	(todos-date-string-matcher, todos-time-string-matcher)
	(todos-done-string-matcher, todos-category-string-matcher): Rename
	from *-match and adjust callers.
	(todos-wrap-and-indent): Use set instead of setq for local variables.
	(todos-prefix-overlays): Improve overlay handling.
	(todos-reset-categories): Fix and complete implementation.
	(todos-toggle-show-current-file): Rename from
	todos-toggle-switch-todos-file-noninteractively.
	(todos-category-select): Use todos-mode-line-function.
	(todos-item-start): Comment out code used by removed function.
	(todos-remove-item): Handle presence of both prefix/number and
	mark overlays.
	(todos-get-count): Simplify.
	(todos-set-count): Change argument list and adjust callers; simplify.
	(todos-set-categories): Handle new archive files; use
	todos-categories-full and todos-ignore-archived-categories.
	(todos-truncate-categories-list): Use todos-categories-full.
	(todos-update-categories-sexp): Use kill-region instead of
	kill-line; use todos-categories-full.
	(todos-read-file-name): Add argument to require existing file and
	adjust callers; use file-truename.
	(todos-read-category): Remove argument to require existing
	category and delegate it to completing-read in function body.
	(todos-validate-category-name): Make empty string prompt only for
	initial category name.
	(todos-read-date): Use = instead of eq for testing if month = 13,
	and if it is, set monthname to *.
	(todos-display-categories): Use todos-global-current-todos-file;
	use set-window-buffer instead of switch-to-buffer; add a line
	showing item count totals.
	(todos-padded-string): Use the longest of category name or label.
	(todos-descending-counts): Rename from
	todos-descending-counts-store and adjust users.
	(todos-insert-category-line): Adjust format; use mapconcat; kill
	buffer after jumping to category.

2012-09-18  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2011-05-16 (revision 109996).
	* calendar/todos.el Add and revise various doc strings, remove
	further commented out code; add further comments; further code
	rearrangement.
	(todos-file-do, todos-archive-file, todos-mode-hook)
	(todos-edit-mode-hook, todos-exclusion-start, todos-exclusion-end)
	(todos-view-archive, todos-search-string)
	(todos-jump-to-category-noninteractively, todos-initial-setup):
	Remove.
	(todos-files): Remove this defcustom.
	(todos-initial-category, todos-display-categories-first)
	(todos-auto-switch-todos-file, todos-default-todos-file)
	(todos-categories-category-label, todos-categories-todo-label)
	(todos-categories-diary-label, todos-categories-done-label)
	(todos-categories-archived-label)
	(todos-categories-number-separator, todos-categories-align)
	(todos-ignore-archived-categories, todos-nondiary-marker):
	New defcustoms.
	(todos-prefix, todos-done-separator, todos-file-top)
	(todos-categories-buffer, todos-archived-categories-buffer)
	(todos-edit-buffer, todos-always-add-time-string, todos-button):
	Change default value.
	(todos-done-string): Add todos-reset-done-string as :set function,
	but keep this commented out.
	(todos-files, todos-archives, todos-insertion-map)
	(todos-category-done, todos-nondiary-start, todos-nondiary-end)
	(todos-show-done-only, todos-date-string-start)
	(todos-done-string-start): New variables.
	(todos-files-directory, todos-files-function, todos-merged-files)
	(todos-prompt-merged-files, todos-files, todos-modes-set-1)
	(todos-modes-set-2, todos-reset-done-string, todos-reset-categories)
	(todos-toggle-switch-todos-file-noninteractively)
	(todos-switch-todos-file, todos-counts, todos-get-count)
	(todos-set-count, todos-set-categories)
	(todos-truncate-categories-list, todos-update-categories-sexp)
	(todos-read-file-name, todos-sort, todos-display-sorted)
	(todos-label-to-key, todos-insert-sort-button): New functions.
	(todos-display-categories-sorted-by-todo)
	(todos-display-categories-sorted-by-diary)
	(todos-display-categories-sorted-by-done)
	(todos-display-categories-sorted-by-archived)
	(todos-update-merged-files, todos-switch-to-archive)
	(todos-choose-archive, todos-merged-top-priorities)
	(todos-jump-to-category-other-file, todos-clear-matches)
	(todos-add-file, todos-change-default-file, todos-move-category)
	(todos-merge-category, todos-merge-categories)
	(todos-edit-item-time, todos-move-item-to-file)
	(todos-unarchive-category, todos-toggle-item-diary-nonmarking)
	(todos-toggle-diary-nonmarking): New commands.
	(todos-toggle-show-done-only): New command replacing todos-view-archive.
	(todos-faces): New defgroup; use in all face definitions.
	(todos-sorted-column, todos-archived-only, todos-search): New faces.
	(todos-font-lock-keywords): Use subexpression 1 with matcher
	todos-category-string-match.
	(todos-mode-map, todos-archive-mode-map, todos-edit-mode-map)
	(todos-categories-mode-map): Add new key bindings; change some
	existing bindings.
	(todos-top-priorities-mode-map): New keymap.
	(todos-menu): Add submenues and new entries.
	(auto-mode-alist): Add extension of Todos and Todos archive files.
	(todos-mode, todos-archive-mode): Make derived mode; use
	todos-modes-set-1, todos-modes-set-2, todos-auto-switch-todos-file
	and todos-switch-todos-file; make todos-show-done-only local
	variable.
	(todos-edit-mode): Make derived mode; use todos-modes-set-1.
	(todos-categories-mode): Make derived mode.
	(todos-top-priorities-mode): New derived major mode.
	(todos-save): Remove unused code.
	(todos-quit): Handle todos-categories-mode; save archive buffer.
	(todos-show): Add optional argument to prompt for a Todos file; if
	called interactively or with prefix arg or from an archive, don't
	make a no-op but reset todos-current-todos-file, todos-categories
	and todos-category-number; use todos-read-file-name,
	todos-display-categories-first, todos-ignore-archived-categories.
	(todos-display-categories): Change argument name; refactor code
	for inserting table labels and lines, using
	todos-ignore-archived-categories, todos-sort,
	todos-categories-number-separator, todos-insert-sort-button,
	todos-categories-*-labels, and todos-insert-category-line.
	(todos-display-categories-alphabetically): Use todos-display-sorted.
	(todos-toggle-view-done-items): Use todos-done-string-start and
	todos-get-count.
	(todos-toggle-display-date-time): Use todos-done-string-start.
	(todos-top-priorities): Remove autoload cookie; partially rewrite:
	new argument list; allow combining top priorities of multiple
	Todos files; change display to include category (and file) name as
	part of item header; use todos-top-priorities-mode.
	(todos-diary-items): Reimplement using only todos-top-priorities.
	(todos-forward-category, todos-backward-category): Adjust to
	1-based numbering of categories; move point to top of category.
	(todos-jump-to-category): Rewrite, adding optional arguments to
	provide a category in non-interactive uses and to prompt for which
	Todos file to jump to.
	(todos-search): Reimplement; highlight each match as found, say
	how many matches remain and prompt whether to go to next one; at
	end of search prompt whether to remove highlighting.
	(todos-add-category): Remove autoload cookie; assign new category
	the highest category number; associate zero-initialized vector of
	item counts, instead of property list, with new category; use
	todos-validate-category-name and todos-update-categories-sexp.
	(todos-rename-category): Use todos-validate-category-name and
	todos-update-categories-sexp; take archive files into account.
	(todos-delete-category): Use todos-get-count and
	todos-update-categories-sexp, let-bind variable that were
	mistakenly global; use delete-region instead of kill-region;
	adjust to 1-based numbering of categories; move point to top of
	category.
	(todos-raise-category): Handle item count vectors; use
	todos-insert-category-line and todos-update-categories-sexp.
	(todos-insert-item): Use nil time-string argument to omit time
	string; use todos-nondiary-start and todos-nondiary-end and
	todos-update-categories-sexp; if category named to insert into
	does not exist, add it; take new diary items into account.
	(todos-insert-item-ask-date, todos-insert-item-ask-date-time)
	(todos-insert-item-ask-date-time-for-diary)
	(todos-insert-item-ask-date-time-for-diary-here)
	(todos-insert-item-ask-date-time-here)
	(todos-insert-item-ask-date-maybe-notime)
	(todos-insert-item-ask-date-maybe-notime-for-diary)
	(todos-insert-item-ask-date-maybe-notime-for-diary-here)
	(todos-insert-item-ask-date-maybe-notime-here)
	(todos-insert-item-ask-date-for-diary)
	(todos-insert-item-ask-date-for-diary-here)
	(todos-insert-item-ask-date-here, todos-insert-item-ask-dayname)
	(todos-insert-item-ask-dayname-time)
	(todos-insert-item-ask-dayname-time-for-diary)
	(todos-insert-item-ask-dayname-time-for-diary-here)
	(todos-insert-item-ask-dayname-time-here)
	(todos-insert-item-ask-dayname-maybe-notime)
	(todos-insert-item-ask-dayname-maybe-notime-for-diary)
	(todos-insert-item-ask-dayname-maybe-notime-for-diary-here)
	(todos-insert-item-ask-dayname-maybe-notime-here)
	(todos-insert-item-ask-dayname-for-diary)
	(todos-insert-item-ask-dayname-for-diary-here)
	(todos-insert-item-ask-dayname-here, todos-insert-item-ask-time)
	(todos-insert-item-ask-time-for-diary)
	(todos-insert-item-ask-time-for-diary-here)
	(todos-insert-item-ask-time-here)
	(todos-insert-item-maybe-notime)
	(todos-insert-item-maybe-notime-for-diary)
	(todos-insert-item-maybe-notime-for-diary-here)
	(todos-insert-item-maybe-notime-here)
	(todos-insert-item-for-diary, todos-insert-item-for-diary-here):
	New insertion commands.
	(todos-insert-item-from-calendar): Use todos-current-todos-file.
	(todos-delete-item): Handle diary items;
	use todos-update-categories-sexp.
	(todos-edit-item): Check if point is with item string;
	use read-string instead of read-from-minibuffer;
	use todos-date-string-start; after editing put point at start of
	item text.
	(todos-edit-multiline): Narrow to item before invoking
	todos-edit-mode; show key binding of todos-edit-quit in a message.
	(todos-edit-quit): Use todos-save; kill buffer.
	(todos-edit-item-header): Add optional argument to prompt for
	editing only date string or only time string;
	use todos-date-string-start.
	(todos-edit-item-date, todos-edit-item-date-is-today)
	(todos-raise-item-priority, todos-lower-item-priority): Rename
	from todos-{raise, lower}-item and make them DTRT in
	todos-top-priorities-mode.
	(todos-set-item-priority): Make interactive; use todos-get-count
	and todos-insert-with-overlays; interactively, just relocate the
	item within its category.
	(todos-move-item): Add optional argument to prompt for a category
	in another Todos file; handle diary items; fix restoration after
	cancelling before inserting.
	(todos-item-done): Handle diary items; simplify handling of
	insertion in done items section.
	(todos-item-undo): Handle diary items.
	(todos-archive-done-items): Adjust to new handling of archive
	files (in parallel with Todos files); handle diary items; use
	todos-done-string-start.
	(todos-toggle-item-diary-inclusion): Use todos-nondiary-start,
	todos-nondiary-end and todos-item-counts.
	(todos-toggle-diary-inclusion): Use todos-category-done instead of
	todos-category-end.
	(todos-print): Remove autoload cookie; rewrite to make overlays,
	line wrapping and wrap prefixes printable.
	(todos-date-pattern): Make parenthesized groups shy.
	(todos-date-string-match): Use todos-date-string-start; make
	todos-date-pattern an explicitly numbered group.
	(todos-time-string-match): Use todos-date-string-start.
	(todos-done-string-match): Use todos-done-string-start.
	(todos-category-string-match): Rewrite to match new category and
	category+filename patterns in todos-top-priorities-mode.
	(todos-prefix-overlays): Use todos-done-string-start and
	todos-category-done.
	(todos-reset-prefix): Handle archive files; restore point after
	changing prefix.
	(todos-reset-separator): Handle archive files.
	(todos-category-number): Make category number one more than its
	list index.
	(todos-current-category): Adjust to 1-based numbering of categories.
	(todos-category-select): Simplify handling of done items and done
	separator string overlay.
	(todos-item-start): Use todos-date-string-start and
	todos-done-string-start.
	(todos-item-start, todos-item-end): Fix wrong parenthesizing.
	(todos-item-string): Restore point after getting item bounds; use
	buffer-substring-no-properties.
	(todos-done-item-p): Use todos-done-string-start.
	(todos-make-categories-list): Add optional argument to force
	looping through file to get categories and their item counts,
	otherwise set todos-categories from sexp in first line; use
	vectors of item counts instead of plists; count diary items.
	(todos-item-counts): Use todos-counts, todos-set-counts,
	todos-get-counts, and todos-update-categories-sexp instead of
	getting and setting properties; handle diary items.
	(todos-read-category): Add argument to set prompt; don't offer
	default category.
	(todos-validate-category-name): Rename from
	todos-check-category-name; take into account whether there are
	already categories or not.
	(todos-read-date): Accept `*' as an unspecified month, day, or year.
	(todos-padded-string): Accommodate new structure of
	todos-categories as alists; use todos-categories-align.
	(todos-descending-counts-store): New variable.
	(todos-insert-category-line): Rename from
	todos-insert-category-name and reimplement using labels and
	todos-get-counts instead of properties; use
	todos-ignore-archived-categories; highlight sorted column.

2012-09-14  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2010-07-09 (revision 109995).
	* calendar/todos.el Remove lots of commented out code; add various
	comments; further code rearrangement.
	(todos-insert-item-here-ask-date-time)
	(todos-insert-item-ask-date-time)
	(todos-insert-item-ask-dayname-time)
	(todos-insert-item-for-diary)
	(todos-insert-item-for-diary-ask-date-time)
	(todos-make-categories-alist, todos-categories-alist): Remove.
	(todos-categories-list): Comment out.
	(todos-make-categories-list): New function replacing
	todos-make-categories-alist, using category plists to get item
	counts and taking archive into account.
	(todos-current-todos-file): New variable.
	(todos-mode-map): Update key bindings.
	(todos-save): Add as comment code to make sure todos-categories
	sexp is current on saving.
	(todos-quit): Call todos-show on quitting Todos archive buffer.
	(todos-show): If todos-current-todos-file is not set to Todos
	file, set it as a new file; set todos-categories from
	todos-make-categories-alist.
	(todos-display-categories): Use a different display format for
	archive file; put point initially on the first button.
	(todos-toggle-view-done-items): Check the category's `done'
	property to determine if there are done items.
	(todos-view-archive): Set todos-current-todos-file to the archive
	file; jump from the Todos file to the same category in the
	archive, if it exists, else jump to the first category; use
	message instead of error.
	(todos-add-category): Intern a special symbol for the new category
	and set its property list to holds counts of the numbers of todo,
	done and archived items in the category; assign the new category
	the current highest category number.
	(todos-rename-category): Don't use todos-categories-alist.
	(todos-delete-category): Check the category's `todo' and `done'
	properties to determine if it is empty; ensure that the end of the
	last category is found; after deleting the category, empty its
	plist and unintern its special symbol.
	(todos-insert-item-here): Fix argument list of todos-insert-item.
	(todos-delete-item, todos-raise-item, todos-lower-item):
	Use message instead of error.
	(todos-move-item): If the category to be moved to does not exist,
	add it as a new category.
	(todos-item-done, todos-reset-separator):
	Use todos-category-select instead of todos-show.
	(todos-archive-done-items): Make buffer writeable; conditionalize
	search for end of category; save after adding to archive in case
	the file is new, so it can be found.
	(todos-category-select): Wrap search in if instead of or+and;
	don't hide done items in an archive.
	(todos-set-item-priority): Check the category's `todo'
	property to determine if there are not done todo items.
	(todos-jump-to-category-noninteractively): Just switch to buffer
	visiting todos-current-todos-file, since this can be either a
	Todos file or an archive.
	(todos-item-counts): Use category's plist instead of an alist.
	(todos-longest-category-name-length): Argument is now a list of
	category names, not an alist, so just test each element, not each
	element's the car.
	(todos-padded-string): Use todos-categories instead of
	todos-categories-alist.
	(todos-insert-category-name): Use category plist to get item
	counts; take archived items into account.

2012-09-13  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2010-06-18 (revision 109994).
	* calendar/todos.el: Numerous spelling and comment fixes, doc
	string fixes to conform with checkdoc, further rearrangement of
	definitions, etc.
	(todos-previous-line, todos-previous-answer)
	(todos-insert-item-ask-date, todos-change-date)
	(todos-date-nodayname-pattern, todos-dayname-date-pattern)
	(todos-count-items-in-category, todos-count-all-items): Remove.
	(todos-update-numbered-prefix, todos-item-start-overlays)
	(todos-add-item-non-interactively): Comment out, also in uses.
	(todos-done-separator): Change default value.
	(todos-always-add-time-string): Rename from todos-add-time-string
	and adjust uses.
	(todos-read-category): Rename from todos-completing-read and
	adjust callers; use todos-current-category.
	(todos-make-categories-alist): Rename from function
	todos-categories-alist.
	(todos-categories-alist): New variable.
	(todos-indent-to-here): New defcustom.
	(todos-button): New face.
	(todos-display-categories-alphabetically, todos-raise-category)
	(todos-lower-category, todos-insert-item-for-diary-ask-date-time)
	(todos-insert-item-here-ask-date-time)
	(todos-insert-item-ask-date-time)
	(todos-insert-item-ask-dayname-time): New commands.
	(todos-edit-item-header): New command replacing todos-change-date.
	(todos-category-number, todos-indent, todos-item-counts)
	(todos-check-category-name, todos-read-date, todos-read-dayname)
	(todos-read-time, todos-padded-string)
	(todos-insert-category-name): New functions.
	(todos-set-item-priority): New function replacing
	todos-add-item-non-interactively.
	(todos-mode-map): Remap newline to newline-and-indent.
	(todos-edit-mode-map): Make sparse keymap; remap newline to
	newline-and-indent.
	(todos-categories-mode-map): New keymap.
	(todos-mode, todos-edit-mode): Make indent-line-function local
	variable and set to todos-indent.
	(todos-categories-mode): New major mode.
	(todos-display-categories): List categories initially in their
	numerical order; add optional argument to switch to alphabetical
	listing.
	(todos-toggle-view-done-items): Simplify implementation.
	(todos-toggle-display-date-time): Fix regexp search string.
	(todos-backward-item, todos-forward-item): Use variable
	todos-item-start.
	(todos-add-category): Use todos-check-category-name and
	todos-categories-alist.
	(todos-rename-category): Use todos-current-category,
	todos-check-category-name and todos-categories-alist.
	(todos-delete-category): Use todos-check-category-name and
	todos-categories-alist and take done items into account.
	(todos-insert-item): Use separate arguments to handle insertion of
	date/dayname and time strings, add new argument to mark item for
	diary inclusion, use new todos-read-* functions,
	todos-set-item-priority and todos-item-counts.
	(todos-insert-item-here, todos-insert-item-for-diary)
	(todos-insert-item-from-calendar): Adapt to new version of
	todos-insert-item.
	(todos-delete-item, todos-item-done): Use todos-item-counts.
	(todos-edit-item): Indent newlines inserted by C-q C-j if nonspace
	char follows.
	(todos-lower-item): Ensure only not-done items can be lowered.
	(todos-move-item): Use todos-current-category, todos-read-category
	and todos-item-counts.
	(todos-archive-done-items): Use todos-current-category and
	todos-item-counts; fix regexp search string.
	(todos-item-undo): Use todos-current-category,
	todos-set-item-priority, todos-insert-with-overlays and
	todos-item-counts; restore if user quits before inserting undone
	item.
	(todos-date-pattern): Rewrite without using
	todos-date-nodayname-pattern and todos-dayname-date-pattern.
	(todos-date-string-match): Do not make todos-date-pattern an
	unnumbered group.
	(todos-time-string-match): Make todos-date-pattern a shy group.
	(todos-wrap-and-indent): Use todos-indent-to-here.
	(todos-reset-prefix): Revert to using todos-show instead of
	todos-category-select.
	(todos-prefix-overlays): Fix numbering of done items and updating
	of prefix.
	(todos-category-select): Use todos-current-category; fix display
	of separator string; don't move point to top of category.
	(todos-jump-to-category-noninteractively): Use todos-category-number.
	(todos-insert-with-overlays): Use todos-item-start unconditionally.
	(todos-item-start): New variable.
	(todos-item-start): Use it to define this function.
	(todos-item-end): Adjust if item is last unfinished one before
	displayed done items.
	(todos-remove-item): Use todos-item-start and todos-item-end
	instead of todos-forward-item and todos-backward-item.
	(todos-longest-category-name-length): Add argument for list of
	categories.

2012-09-13  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2010-05-25 (revision 109993).
	* calendar/todos.el: Comment out calendar require, since diary-lib
	requires calendar.  Rearrange file to group definitions according
	to their use (types of commands, internal functions, etc.)
	(todos-file-done, todos-insert-threshold, todos-remove-separator)
	(todos-date-string, todos-time-string, todos-check-overlay)
	(todos-show-paren-hack, todos-file-item, todos-more-important-p):
	Comment out.
	(todos-current-date, todos-item-end-overlays)
	(todos-list-categories): Remove.
	(todos-item-end): Remove (the variable, not the function).
	(todos-prefix-overlays): Rename from todos-item-overlays and adjust
	callers.
	(todos-done-separator, todos-done-string, todos-show-with-done)
	(todos-files, todos-archive-file, todos-categories-buffer)
	(todos-archived-categories-buffer, todos-wrap-lines)
	(todos-line-wrapping-function): New defcustoms.
	(todos-done, todos-done-sep): New faces.
	(todos-done-face, todos-done-sep-face): Corresponding new variables.
	(todos-search-string, todos-date-nodayname-pattern)
	(todos-dayname-date-pattern, todos-date-pattern): New variables.
	(todos-done-string-match, todos-category-string-match)
	(todos-check-format, todos-wrap-and-indent, todos-reset-separator)
	(todos-current-category, todos-count-items-in-category)
	(todos-done-item-p, todos-categories-alist, todos-count-all-items)
	(todos-longest-category-name-length): New functions.
	(todos-categories-list): New buffer-specific function replacing
	todos-list-categories.
	(todos-toggle-item-numbering, todos-toggle-view-done-items)
	(todos-search, todos-view-archive, todos-diary-items)
	(todos-toggle-display-date-time, todos-insert-item-no-time)
	(todos-insert-item-ask-date, todos-insert-item-for-diary)
	(todos-insert-item-from-calendar, todos-edit-quit)
	(todos-change-date, todos-item-done, todos-archive-done-items)
	(todos-item-undo): New commands.
	(todos-archive-mode): New major mode.
	(todos-archive-mode-map, todos-edit-mode-map): New keymaps.
	(todos-category-beg): Change value.
	(todos-number-prefix): Change default value.
	(todos-edit-buffer): Change from defvar to defcustom.
	(todos-font-lock-keywords): Use todos-done-string-match and
	todos-category-string-match.
	(todos-backward-item, todos-forward-item): Use todos-done-string
	and todos-date-pattern.
	(todos-display-categories): Reimplement using buttons from
	button.el instead of widgets.
	(todos-top-priorities): Use with-current-buffer; take done items
	into account; ensure buffers gets fontified.
	(todos-add-category): Ensure new category does not begin with
	empty lines.
	(todos-jump-to-category): Use todos-category-select instead of
	todos-show.
	(todos-rename-category): Prompt for new name in body instead of in
	interactive spec.
	(todos-insert-item): Don't insert in done items section of
	category.  Add two optional arguments to control insertion: (i) to
	insert near point without prompting for priority; (ii) to use
	defaults for date and time strings, to prompt for these, or to
	choose date from the Calendar.
	(todos-insert-item-here): Reimplement using todos-insert-item.
	(todos-delete-item): Don't move point after deleting last item.
	(todos-raise-item, todos-lower-item): Take done items into account.
	(todos-move-item): Don't move done items; update item numbering;
	restore if user quits before inserting moved item.
	(todos-print): Prompt for confirmation to print.
	(todos-reset-prefix): Search backward from end of file instead of
	forward from top.
	(todos-jump-to-category-noninteractively): Take Todos archive into
	account.
	(todos-category-select): Show or hide done items according to
	todos-show-with-done; if shown, coordinate separator and prefix
	overlays.
	(todos-add-item-non-interactively): Replace binary insertion
	algorithm with prompting for numerical priority.
	(todos-insert-with-overlays): Remove use of variable todos-item-end.
	(todos-item-start): Take done items into account; use
	todos-date-pattern.
	(todos-item-end): Reimplement using todos-forward-item.
	(todos-remove-item): Reimplement using todos-forward-item and
	todos-backward-item; redo overlay handling.
	(todos-mode-map): Add some new key bindings and change numerous
	existing bindings; use "i" as prefix key for item insertion
	commands.
	(todos-mode): Use todos-wrap-lines and delegate word-wrap and
	wrap-prefix settings to todos-wrap-and-indent; add to invisibility
	spec; set buffer-read-only to t and consequently let-bind this
	variable in all Todos commands that change buffer content.
	(todos-edit-mode): Make an indepent mode, not derived from text-mode.
	(todos-save): Don't save top priorities buffer.
	(todos-show): Make a no-op if called interactively in narrowed
	Todos mode, since, also to work around item prefix reduplication
	bug with show-paren-mode enabled; use todos-categories-list.

2012-09-12  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2009-11-07 (revision 109992).
	* calendar/todos.el: Comment out time-stamp require; require
	calendar and diary-lib.
	(todos-prefix): Change default value and doc string to reflect new
	meaning; add :initialize and :set functions.
	(todos-time-string-format, todos-entry-prefix-function)
	(todos-initials, todos-entry-timestamp-initials)
	(todos-prefix-face, todos-category-sep, todos-category-end)
	(todos-cp): Comment out.
	(todos-prefix-string): Inherit from font-lock-comment-face.
	(todos-item-header, todos-item-header-face): Remove.
	(todos-date, todos-time): New faces.
	(todos-date-face, todos-time-face): Corresponding new variables.
	(todos-add-time-string, todos-include-in-diary)
	(todos-exclusion-start, todos-exclusion-end, todos-number-prefix):
	New defcustoms.
	(todos-item-end, todos-item-start-overlays)
	(todos-item-end-overlays): New variables.
	(todos-date-string-match, todos-time-string-match): New functions.
	(todos-font-lock-keywords): Use them.
	(todos-current-date, todos-date-string, todos-time-string)
	(todos-toggle-item-diary-inclusion, todos-toggle-diary-inclusion)
	(todos-reset-prefix, todos-update-numbered-prefix)
	(todos-check-overlay, todos-item-overlays)
	(todos-insert-with-overlays, todos-show-paren-hack): New functions.
	(todos-highlight-item): New command.
	(todos-category-beg): Change value.
	(todos-category-select): Use todos-category-beg and todos-item-overlays.
	(todos-backward-item): Add optional count argument; use it and
	todos-item-start.
	(todos-forward-item): Use todos-check-overlay, todos-item-start
	and variable todos-item-end.
	(todos-edit-item, todos-delete-item): Use todos-number-prefix,
	todos-update-numbered-prefix, todos-item-overlays.
	(todos-add-category, todos-rename-category)
	(todos-list-categories): Use new category format.
	(todos-delete-category): Allow deleting non-empty category;
	use new category format.
	(todos-add-item-non-interactively): Comment out unnecessary
	save-excursion; use todos-insert-with-overlays.
	(todos-insert-item): Comment out unnecessary save-excursion; use
	new item format for date/time header and diary inclusion marking.
	(todos-insert-item-here): Use new item format for date/time header
	and diary inclusion marking; use todos-insert-with-overlays.
	(todos-raise-item): Make a no-op if point is on an empty line; use
	todos-insert-with-overlays.
	(todos-lower-item): Use todos-insert-with-overlays.
	(todos-top-priorities): Move call to todos-show inside
	save-excursion; add save-current-buffer after save-restriction.
	(todos-item-start): Use variable todos-item-end.
	(todos-item-end): Use todos-check-overlay and variable todos-item-end.
	(todos-remove-item): Take item overlays into account.
	(todos-mode): Change calculation of wrap-prefix; make
	hl-line-range-function a local variable and set it to highlight
	todo item.
	(todos-show): Ensure point stays at top of category.

2012-09-12  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2009-07-04 (revision 109991).
	* calendar/todos.el (todos-window-configuration): Comment out.
	(todos-display-categories): Comment out use of
	todos-window-configuration; use switch-to-buffer instead of
	pop-to-buffer.
	(todos-jump-to-category-noninteractively): Comment out use of
	todos-window-configuration.
	(todos-edit-item): Don't allow editing of date/time item header.
	(todos-insert-item, todos-insert-item-here): Insert date/time
	header in front of new item string.
	(todos-mode): Tweak wrap-prefix.

2012-09-12  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2009-06-26 (revision 109989).
	* calendar/todos.el (todos-file-do, todos-file-done):
	Change default location to directory "~/.emacs.d/".
	(todos-completion-ignore-case, todos-categories-buffer):
	New defcustoms.
	(todos-prefix-string, todos-item-header): New faces.
	(todos-prefix-face, todos-item-header-face): Corresponding
	new variables.
	(todos-rename-category, todos-delete-category)
	(todos-display-categories, todos-move-item): New commands.
	(todos-mode-map): Add key bindings for new commands and for
	todos-add-category, which had no key binding.
	(todos-jump-to-category-noninteractively): New function.
	(todos-top-priorities): Comment out code using a previously
	deleted variable.
	(todos-completing-read): Allow SPC to insert a space when entering
	a new category name; use todos-completion-ignore-case.
	(todos-font-lock-keywords, todos-window-configuration):
	New variables.
	(todos-mode): Make mode-name "TODOS"; make font-lock-defaults,
	word-wrap, and wrap-prefix local variables.

2012-09-12  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2009-02-16 (revision 109988).
	* calendar/todos.el (todos-list-categories): Fix typos.
	(todos-show): Ensure file is in todos-mode.

2012-09-12  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2009-02-12 (revision 109987).
	* calendar/todos.el (todos-header): Remove defvar.
	(todos-add-category): Comment out code that inserts and updates
	the file local variables first line of the file todos-file-do.
	(todos-list-categories): New function.
	(todos-show): Use it; remove use of a previously deleted variable.

2012-09-11  Stephen Berman  <stephen.berman@gmx.net>

	Changes from 2009-02-12 (revision 109986).
	* calendar/todos.el: New file.  This is a copy of todo-mode.el
	from revision 94343 except for the following changes: replace all
	occurrences of the namespace prefix "todo-" with "todos-", delete
	the defvar todo-cats (the old name of todo-categories) and its use
	in todos-add-category, delete all defaliases of old command names.