I've been working on a semantic-decoration style which allows tags to be folded and unfolded, and uses fringe bitmaps to indicate where the tags are.
http://www.emacswiki.org/elisp/semantic-tag-folding.el >From the commentary : ;;; Defines a `semantic-decoration-mode' style which allows semantic ;;; tags to be expanded or collapsed in the style of folding mode and ;;; hideshow mode. In addition to regular semantic tag, comments ;;; preceeding tags can also be folded, and consecutive 'include tags ;;; are folded as a single unit. ;;; ;; Features: ;; 1. Indicators in the fringe to show which tags which can be ;; expanded or hidden, clicking on the fringe symbols toggles the ;; associated block's state ;; 2. `semantic-tag-folding-allow-folding-of' lets you customize which ;; tags can be folded, and which of those tags are folded by ;; default when this mode is first activated. ;; 3. hs-mode style commands to hide and show all tags or only the ;; current tag. ;; It's been mainly tested on cvs emacs for windows (nqmacs). It works with reduced functionality on older emacs versions (those without define-fringe-bitmap, and probably not at all under XEmacs. I went a bit overboard with the fringe bitmaps - customizing `semantic-tag-folding-fringe-image-style' lets you select between 1) 'plusminus, where a little plus in the fringe indicates that a tag is folded on that line, and it changes to a small minus when the tag is unfolded, and 2) 'triangles, where the folded and unfolded symbols are eclipse style horizontal and vertical triangles. Setting `semantic-tag-folding-momentarily-highlight-tags-on-expand' to t will enable a brief animation in the fringe when a tag is unfolded to indicate its extent. Eric, I have a couple of questions about semantic-decorate-mode: 1) The definition of semantic-decoration-styles seems to be missing a :require attribute for semantic-decorate-mode. Currently, if I try to customize its value, after starting up emacs I end with each style listed twice in semantic-decoration-styles. 2) I need to add a keybinding for clicking on the fringe for this mode, it would be nice if there was key map for semantic-decoration-mode. 3) What is a good way to enable semantic-decoration-mode by default ? I tried (add-hook 'jde-mode-hook 'semantic-decoration-mode) but it complains "Buffer Foo.java was not set up for parsing". 4) Once semantic-decoration-mode is up and running and all the tags have been decorated, if I make any edits in a tag it looks like all the decorations for the tag are deleted and it is sent to the highlight-default function again. Is there any way for the function to be called with the old decorations intact so it can remove them only if it wants to ? Suraj
