NAME

       hintview- displaying HINT files

SYNOPSIS

       hintview [options] [file]

DESCRIPTION

       Hintview displays a binary HINT file, usually with the .hnt extension.

       The  binary HINT file format is designed for on-screen reading of documents.  Using hintview to display a
       HINT file, its content will dynamically adapt to the available display area. For complete information  on
       the HINT file format and programs to view HINT files, see https://hint.userweb.mwn.de.

OPTIONS

       This version of hintview understands the following command line options:

       -a     Start  in  autoreload  mode. If in autoreload mode, the viewer will check the modification time of
              the displayed HINT file each time the cursor enters the window.   If  the  modification  time  has
              changed,  the  file  is  reloaded.  The viewer attempts to position the new file at about the same
              position as the old file. This attempt might fail if large scale changes have  been  made  to  the
              file.

              See also the Ctrl-A and the Ctrl-R key.

       -h     Open the document on the "home" page. The home page is a location specified by the document author
              as a good starting point for reading the document.

              See also the Ctrl-H key.

       --help Print help message and exit.

       -n     Start  the  viewer in "night" mode. In this mode the viewer will display the document using a dark
              background and light foreground color to reduce eye strain in a surrounding with dim lighting.

              See also the Ctrl-N key.

       -o     Show a clickable outline of the content. NOT YET IMPLEMENTED.

              See also the Ctrl-O key.

       --version
              Print version information and exit.

       -z     Zoom to 100%. The HINT viewer can display a document using a given zoom factor to make  characters
              appear  larger or smaller to either improve readability or increase the amount of text that can be
              displayed in a given window. This option resets the zoom factor so that a 10pt font will appear on
              screen at the same size as it would appear in a printed book.

              See also the Ctrl-Z key.

KEYSTROKES

       Hintview recognizes the following keystrokes when typed in its window.

       Ctrl-A Toggle autoreload mode. See also the -a option and the Ctrl-R key.

       Ctrl-F Open the Find dialog. NOT YET IMPLEMENTED.

       Home, Ctrl-H
              Move to the "home" page. The home page is a location specified by the document author  as  a  good
              starting point for reading the document.

       Ctrl-N Toggle between night and day mode. See also the -n option.

       Ctrl-O Show a clickable outline of the content. NOT YET IMPLEMENTED.

       Page-Down
              Move to the next page.

       Page-Up
              Move to the previous page.

       Ctrl-R Reload the content. The file is reloaded and the viewer attempts to position the new file at about
              the  same  position as the old file. This attempt might fail if large scale changes have been made
              to the file. See also the Ctrl-A key and the -a option.

       Ctrl-Z Zoom to 100%. See also the -z option.

MOUSE ACTIONS

       The following actions are executed using the left mouse button.

       Click  If the mouse is positioned on a link, move to the link target. Links are displayed in blue color.

       Drag   Dragging from the top-left to the  bottom-right  increases  the  zoom  factor.   Dragging  in  the
              opposite direction decreases the zoom factor. See also the Ctrl-Z key and the -z option.

NOTES

       This  is  a simple, bare-bone implementation of a program to render HINT files. Other programs to display
       HINT files are available on the HINT project home page at  https://hint.userweb.mwn.de/  where  you  find
       viewers for the Windows and Android operating systems.

       Currently  the  best  way  to produce HINT files is the use of hitex, a version of TeX that produces HINT
       files as its output. The HINT file format is described in HINT: The file format which is available  as  a
       book  or  in  electronic form from the HINT project home page. The HINT file format is independent of TeX
       and allows the implementation of generators for all kind of word-processors. The hintview program however
       uses parts of Donald E. Knuth's implementation of TeX, notably its line breaking routine, to produce good
       quality rendering of documents.

AVAILABILITY

       hintview is tested on the Linux platform but should compile on a large variety of  machine  architectures
       and operating systems.  It is part of the TeX Live distribution.

SEE ALSO

       hitex(1), histretch(1), hishrink(1).

AUTHORS

       Martin Ruckert

Version 1.0                                     11 November 2021                                     HINTVIEW(1)