Removed newlines from legal text in translations

A recent patch removed the newlines from the default English legal text, as the
legal panel automatically wraps text so the newlines were unnecessary.  In this
patch, they are removed from all .po files which contain a translation of the
legal text.
Improved ignore for 'm4' macro directory

The previous rule was to ignore the whole directory, while still having
some files tracked inside.

Now we only explicitly ignore the files that have been placed there by the
autotools, so we can have a better view of it in Git when adding stuff.

Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
configure: Moved detection of GIF support to a dedicated macro

The original check was not compliant with autoconf's syntax, did not
have a very good behaviour for user and was not easy to make evolve.

The new macro:
 - uses as much as possible autoconf macros for portability and code
consistency;
 - provides a consistent behaviour on yes/no/auto (if user explicitly
enables support, do not silently disable if not found; if library is found
but not the header, complain to let user install it or explicitly disable
support);
 - makes uses of shell functions to keep generated configure smaller by
sharing reusable stuff;
 - introduces a tracking of unsupported things to be reported to user

It includes a fixes from a problem found by Amadeusz S-B³awiñski, because-A
the function 'wm_fn_imgfmt_try_link' modified the variable LDFLAGS
instead of LIBS.

Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
wrlib: Use a Conditional for GIF in the makefile instead of #if in source

The use of the conditionals provided by autotools provides a better result
as they avoid unnecessary compilation.

Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
Signed-off-by: Carlos R. Mafra <crmafra@gmail.com>
wrlib: Add support for v5 of the gif_lib API

As reported by Nicolas (nhs), compilation of wrlib is broken when
switching to gif_lib v5.

The API of gif_lib has known little change to provide thread-safe usage,
so we now detect this in configure and and use the functions as appropriate
in gif.c

Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
Signed-off-by: Carlos R. Mafra <crmafra@gmail.com>
WPrefs: Removed unused argument in function 'WGetEditMenuSubmenu'

The function did not use the argument 'mPtr', so removed it.

Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
Signed-off-by: Carlos R. Mafra <crmafra@gmail.com>
WPrefs: Marked args as unused for compiler in callback code

The function is a callback, which means having a fixed argument list.

It is then correct to not use all the arguments, so this patch adds the
appropriate stuff to avoid a false report from compiler.

Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
Signed-off-by: Carlos R. Mafra <crmafra@gmail.com>
wrlib: Moved configure's detection of JPEG support to a dedicated macro

The original check was not compliant with autoconf's syntax, did not
have a very good behaviour for user and was not easy to make evolve.

The new macro:
 - uses as much as possible autoconf macros for portability and code
consistency;
 - provides a consistent behaviour on yes/no/auto (if user explicitly
enables support, do not silently disable if not found; if library is found
but not the header, complain to let user install it or explicitly disable
support);
 - makes uses of shell functions to keep generated configure smaller by
sharing reusable stuff;
 - uses an automake conditional to avoid compiling the file is support is
not enabled

Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
wrlib: Moved configure's detection of PNG support to a dedicated macro

The original check was not compliant with autoconf's syntax, did not
have a very good behaviour for user and was not easy to make evolve.

The new macro:
 - uses as much as possible autoconf macros for portability and code
consistency;
 - provides a consistent behaviour on yes/no/auto (if user explicitly
enables support, do not silently disable if not found; if library is found
but not the header, complain to let user install it or explicitly disable
support);
 - makes uses of shell functions to keep generated configure smaller by
sharing reusable stuff;
 - uses an automake conditional to avoid compiling the file is support is
not enabled

It includes a typo fixed by Amadeusz S-B³awiñski.-A

Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
wrlib: Moved configure's detection of TIFF support to a dedicated macro

The original check was not compliant with autoconf's syntax, did not
have a very good behaviour for user and was not easy to make evolve.

The new macro:
 - uses as much as possible autoconf macros for portability and code
consistency;
 - provides a consistent behaviour on yes/no/auto (if user explicitly
enables support, do not silently disable if not found; if library is found
but not the header, complain to let user install it or explicitly disable
support);
 - makes uses of shell functions to keep generated configure smaller by
sharing reusable stuff;
 - uses an automake conditional to avoid compiling the file is support is
not enabled

Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
Remove WMFullscreenLevel

Make fullscreen windows be on the same level as normal ones.
Raise fullscreened window

Make sure that fullscreened window covers all normal windows
wrlib: Moved configure's detection of XPM support to a dedicated macro

The original check was not compliant with autoconf's syntax, did not
have a very good behaviour for user and was not easy to make evolve.

The new macro:
 - uses as much as possible autoconf macros for portability and code
consistency;
 - provides a consistent behaviour on yes/no/auto (if user explicitly
enables support, do not silently disable if not found; if library is found
but not the header, complain to let user install it or explicitly disable
support);
 - makes uses of shell functions to keep generated configure smaller by
sharing reusable stuff;
 - uses an automake conditional to avoid compiling the file is support is
not enabled

Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
configure: Moved PPM image format handling to a consistent place

Even if there is nothing to do for PPM at current time (all builtin
code), for consistency it is better placed with the other image
format checks.

Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
wrlib: separated the code to save to XPM from the builtin XPM loading

Big files are harder to work with, so split load and save, which
happen to already be independent anyway.

Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
wrlib: Use a Conditional for XPM in the makefile instead of #if in source

Now that the builtin XPM loading is separated from the saving code, the
use of the conditionals provided by autotools provides a better result
as it avoids unnecessary compilation.

Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
wrlib: Marked args as unused for compiler

The two functions require an argument which is used when the libXpm is
used, which means having the same argument list for the builtin code to be
permutable.

This patch adds the appropriate stuff to avoid a false report from the
compiler.

Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
wrlib: Renamed image format related files for clarity

This patch makes all files appear together when listing files and
it is more clear about their function.

Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
WUtil: New macro 'wlengthof' in the public API to get number of elements in an array

The new macro 'wlengthof' returns the number of elements for which a local
array have been defined, which makes code easier to read than the
previous [sizeof() / sizeof([0]) ] construct.

The macro includes a static assertion to stop compilation if it is being
used on a pointer, for which we cannot know the size of the array, to
avoid generating dummy result. This can work only with C11 which
standardised the static assertions.

Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
WINGs: Use the macro 'wlengthof' to get the number of element in an array

The new macro 'wlengthof' from WUtil makes code easier to read than the
previous [sizeof() / sizeof([0]) ] construct.

Signed-off-by: Christophe CURIS <christophe.curis@free.fr>