which characters are special in which situations.
(Regexp Special): Recommend _not_ to quote `]' or `-' when they
are not special. Describe in detail when `[' and `]' are special.
(Regexp Backslash): Plenty of regexps with unbalanced square
brackets are valid, so reword that statement.
(tree-widget-theme-name): Ignore parent themes.
(tree-widget-set-parent-theme): New function.
(tree-widget-set-theme): Use it.
(tree-widget-set-image-properties): Move definition. Does nothing
if image properties have already been set.
(tree-widget-image-properties): Move definition. Receive an image
name. Set the :pointer property.
(tree-widget-lookup-image): Doc fix. Search in parent themes.
Don't set the :pointer image property.
(tree-widget-convert-widget): New function. Handle :dynargs
compatibility here.
(tree-widget): Use it to :convert-widget. Add the :expander-p
predicate to control when the :expander function is entered.
Thanks to Ken Manheimer <ken.manheimer@gmail.com> for the idea.
(tree-widget-value-create): Handle :expander-p. widget-apply
:expander.
(tree-widget-expander-p): New function. Default value of the
:expander-p property.
(x_set_toolkit_scroll_bar_thumb, x_scroll_bar_create)
(XTset_vertical_scroll_bar) [USE_TOOLKIT_SCROLL_BARS]: Don't show
scroll bar if it is not tall enough to display scroll bar thumb.
[USE_CARBON_EVENTS] (mac_convert_event_ref)
(mac_handle_command_event, mac_handle_window_event)
(mac_handle_mouse_event): Check error code of GetEventParameter.
(convert_fn_keycode) [MAC_OSX]: Likewise.
(x_set_scroll_bar_foreground, x_set_scroll_bar_background): Remove
unnecessary prototypes.
(x_set_scroll_bar_default_width): Use
MAC_AQUA_VERTICAL_SCROLL_BAR_WIDTH.
(mac_set_scroll_bar_width): New function.
(mac_frame_parm_handlers): Set it as handler for scroll-bar-width.
mh-utils.el and wrap with mh-defun-compat since this function will be
soon added to image.el.
* mh-utils.el (mh-image-load-path-for-library): Move to mh-compat.el.
(mh-normalize-folder-name): Add return-nil-if-folder-empty argument
which is useful when calling mh-normalize-folder-name to process the
folder argument for the folders command.
(mh-sub-folders): Use new flag to mh-normalize-folder-name to make
this function more robust. It could too easily list the folders in /.
(mh-folder-list): Fix a couple of problems pointed out by Thomas
Baumann. Set folder to nil if empty. Don't append "/" if folder nil.
