The process to generate the docs now uses the full Doxyfile as given
by `doxygen -u Doxyfile.in` with a specific doxygen version, in this
commit version 1.8.14.
There's only one addition: 'HTML_COLORSTYLE = TOGGLE' which has been
added to doxygen in version 1.9.5. We're using it now to give the user
the choice to select a "dark mode" or "light mode" theme if the docs
are generated with doxygen 1.9.5 or later.
Unknown doxygen tags are now filtered silently and logged in files
documentation/Doxyfile_error.log and documentation/Doxybook_error.log,
respectively.
Most (if not all) doxygen tags introduced after 1.5.5 are commented out
to avoid doxygen warnings about obsolete or unknown tags, except
those tags that need a specific value.
Add 'HTML_COLORSTYLE = TOGGLE' (since 1.9.5) for better user experience.
With this tag users can switch between dark and light mode *if*
the docs were generated with doxygen 1.9.5 or later.
Enable search engine.
Log doxygen conversion errors and warnings to Doxy*_error.log,
i.e. silence the doxygen conversion process.
documentation/src/index.dox: Remove background color from html
index page for better contrast when using dark mode.
Use an image to display the table of the detailed description of class
Fl_PostScript_File_Device in PDF format, and keep using a dynamic table
for the HTML format.
Replace use of the '⌘' character in file drawing.dox by text 'cmd'.
Under configure+make it is not possible to enable driver documentation.
Therefore the '@DRIVER_DOCS@' variable must always be cleared.
Add a comment on how to build the driver docs using the Makefile.
Simplify CMake whitespace (trailing LF) handling.
Make sure we find the correct source dir even if FLTK is included
in a sub build (s/CMAKE_SOURCE_DIR/FLTK_SOURCE_DIR/).
The intermediate files 'Doxyfile' and 'Doxybook' are now converted
to the current Doxygen version and the short form ('-s') when using
configure+make as it was already done in CMake builds.
This is to avoid Doxygen warnings and for better readability
of the Doxygen config files which are created during the build.
... to create the LaTeX header file used by doxygen.
This fix applies to both configure/make and CMake.
The existing version used `doxygen` which erroneously ran the doxygen
version from the current 'PATH' which might issue doxygen warnings and
potentially create a wrong LaTeX header file if the configured doxygen
program was not the one in the user's path.
Pure platform specific files like 'src/*_win32.cxx' are excluded from
doxygen processing and don't need doxygen specific guard macros.
Document this fact prominently at the beginning of each file.
Fix exclude patterns and remove duplicates from Doxyfile.in.
fltk-config has been extended to allow more than one source file
and additional compiler flags and link libraries. This commit adds
documentation (no functional changes).
