Différences

Ci-dessous, les différences entre deux révisions de la page.

--- composition:pourquoi_n_est_ce_pas_wysiwyg4 [2018/05/24 08:30] – joseph.wright
+++ composition:pourquoi_n_est_ce_pas_wysiwyg4 [2020/12/26 19:50] (Version actuelle) – Suppression de la page, déplacée. yannick.tanguy
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-section: Current TeX-related projects
-date: 2014-06-10
----
-# The TeX document preparation environment
-''[Why TeX is not WYSIWYG](FAQ-notWYSIWYG.md)''
-outlines the reasons (or excuses) for the huge disparity of user
-interface between ''typical'' TeX environments and commercial word
-processors.
-Nowadays, at last, there is a range of tools available that try either
-to bridge or to close the gap.  One range modestly focuses on
-providing the user with a legible source document.  At the other
-extreme we have [`TeXmacs`](http://www.texmacs.org),
-a&nbsp;document processor using
-TeX's algorithms and fonts for both editor display and printing.
-`TeXmacs` does not use the TeX
-language itself (though among other formats, LaTeX may be exported
-and imported).  A bit closer to LaTeX is
-[LyX](http://www.lyx.org/), which has its own
-editor display and file formats as well, but does its print output by
-exporting to LaTeX.  The editor display merely resembles the
-printed output, but you have the possibility of entering arbitrary
-LaTeX code.  If you use constructs that LyX does not
-understand, it will just display them as source text marked red, but
-will properly export them.
-Since a lot of work is needed to create an editor from scratch that
-actually is good at editing (as well as catering for TeX), it is
-perhaps no accident that several approaches have been implemented
-using the extensible `emacs` editor.  The low end of the
-prettifying range is occupied by syntax highlighting: marking TeX
-tokens, comments and other stuff with special colors.
-Many free editors (including `emacs`) can cater for TeX in
-this way.  Under Windows, one of the more popular editors with such
-support is the
-Shareware product [`winedt`](http://www.winedt.com/).
-Continuing the range of
-tools prettifying your input, we have the `emacs` package
-[`x-symbol`](http://x-symbol.sourceforge.net), which does
-the WYSIWYG part of its work by replacing single TeX tokens and
-accented letter sequences with appropriate-looking characters on the
-screen.
-A different type of tool focuses on making update and access to
-previews of the typeset document more immediate.  A recent addition
-in several viewers, editors and TeX executables are so-called
-''source specials'' for cross-navigation.  When TeX compiles a
-document, it will upon request insert special markers for every input
-line into the typeset output.  The markers are interpreted by the DVI
-previewer which can be made to let its display track the page
-corresponding to the editor input position, or to let the editor jump
-to a source line corresponding to a click in the preview window.
-An `emacs` package that combines this sort of editor movement
-tracking with automatic fast recompilations (through the use of dumped
-formats) is
-[[`WhizzyTeX`](https://ctan.org/pkg/WhizzyTeX)](http://pauillac.inria.fr/whizzytex/)
- which is best used with a previewer by the
-same author.
-Another `emacs` package called
-[[`preview-latex`](https://ctan.org/pkg/preview-latex)](http://preview-latex.sourceforge.net)
-tries to solve
-the problem of visual correlation between source and previews in a
-more direct way: it uses a LaTeX package to chop the document source
-into interesting fragments (like figures, text or display math) which
-it runs through LaTeX and replaces the source text of those
-fragments with the corresponding rendered output images.  Since it
-does not know about the structure of the images, at the actual cursor
-position the source text is displayed while editing rather than the
-preview.  This approach is more or less a hybrid of the source
-prettifying and fast preview approaches since it works in the source
-buffer but uses actual previews rendered by LaTeX.
-A more ambitious contender is called TeXlite.  This
-system is only available on request from its author;
-it continuously updates its screen with the help of a special version
-of TeX dumping its state in a compressed format at each page and
-using hooks into TeX's line breaking mechanism for reformatting
-paragraphs on the fly.  That way, it can render the output from the
-edited TeX code with interactive speed on-screen, and it offers the
-possibility of editing directly in the preview window.
-That many of these systems occupy slightly different niches can be
-seen by comparing the range of the
-`emacs`-based solutions ranging from syntax highlighting to instant
-previewing: all of them can be activated at the same time without
-actually interfering in their respective tasks.
-The different approaches offer various choices differing in the
-immediacy of their response, the screen area they work on (source or
-separate window), degree of correspondence of the display to the final
-output, and the balance they strike between visual aid and visual
-distraction.