A folding editor is a
text editorwhich supports text folding or code folding, a mechanism allowing the user to hide and reveal blocks of text—usually named. Typically this is done to allow the user to better picture the overall structure of a document or program.
Folding is provided by many modern text editors, and syntax-based or semantics-based folding is now a component of many software development environments.
One of the earliest folding editors was STET, an editor written for the
VM/CMSoperating system in 1977 by Mike Cowlishaw. STET is a text editor (for documentation, programs, etc.) which folds files on the basis of blocks of lines; any block of lines can be folded and replaced by a name line (which in turn can be part of a block which itself can then be folded).
A folding editor appeared in the occam IDE "circa"
1983, which was called the Inmos Transputer Development System.Fact|date=February 2007
The Macintosh computer historically had a number of
source code editors that "folded" portions of code via "disclosure triangles". The UserLand Softwareproduct Frontier is a scripting environment that has this capability. [cite web|accessdate=2006-12-27|url=http://www.outliners.com/|title=Outliners.com]
Editors with folding capability
A number of text editors provide folding capability. Those that do include:
* [http://aoeui.sourceforge.net aoeui] , the Dvorak-optimized editor
* [http://www.editpadpro.com EditPad Pro]
* [http://www.editplus.com/ EditPlus]
* EmEditor Professional
* [http://fte.sourceforge.net/ Folding Text Editor]
* [http://notepad.gridinsoft.com GridinSoft Notepad]
LEXX/LPEX(editor for the OED) [LEXX – A programmable structured editor "IBM Journal of Research and Development", Vol 31, No. 1, 1987, IBM Reprint order number G322-0151]
* [http://www.rj-texted.se RJ Text Editor]
* Xcode 3.0
XEDIT(however its folding is effected by scripts)
* Zeus IDE
* [http://www.moria.de/~michael/fe/folding.html What is a folding editor?] by the author of the
* [http://www.wotug.org/occam/folding.shtml Description of the folding editor] used in occam.
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