Custom Row Headers
A syntax highlighting, code folding text component written in Swing
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robert_futrell
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#4 Custom Row Headers
If users could add custom row headers, RSTA could be used in things such as debuggers (a row header could be added to put breakpoint icons in).
Instead of arbitrary row headers, even just support for a single, "hard-coded" IconRowHeader could be added. This header could be used in the breakpoint example above, as well as for error icons (red X's) to mark invalid source lines. Even this simplified support would probably work for 99% of the use cases for row headers.
In 1.3, the old line numbering code was replaced by a more robust "Gutter" component. This component can render per-line icons for things such as breakpoints, compiler errors, bookmarks, etc. Bookmark support is built-in, with an API to enable or disable it. When enabled, bookmarks are toggled via Ctrl+F2; you can move to the next/previous bookmark via F2/Shift+F2.