Re: How to edit a text file =?UTF-8?Q?=3F?=

From:
ram@zedat.fu-berlin.de (Stefan Ram)
Newsgroups:
comp.lang.c++
Date:
31 Mar 2013 08:56:51 GMT
Message-ID:
<editor-20130331104939@ram.dialup.fu-berlin.de>
Sam <sam@email-scan.com> writes:

It took me about a year to write a fully functional text
editor component


  It does not take a year to write a text editor with an
  interface that is akin to EDLIN of MS-DOS or ED/EX for
  UNIX and only some basic fatures, it can even be written
  in portable C++!

  However, one needs at least a medium level of C++
  competence.

  One can start to write such an editor with a careful
  separation of the model component (which I call the ?edit
  engine?) and the UI component.

  The initial edit engine does not need to use fancy data
  structures like gap buffers or ropes, just a single C++
  ::std::string. But it has an interface (a pure abstract
  class in C++).

  One can have a working editor in a day (a simple text
  command UI for modifications to a single instance of
  ::std::string).

  With regular expressions in C++11, it is more simple to
  implement RE find and replace operations (I guess, I
  have not tried C++11's regular expressions yet).
  The better support for UTF-8 in C++11 also might help.

  More operations can be added from day to day as seen fit.

  Eventually, it is possible to add fancy editor data
  structure like gap buffers (when ::std::string was observed
  to be too slow) or a GUI, without changing the interface of
  the edit engine.

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