In Linux "/.." exists and loops back onto the root. But for the user
it is confusing to see a ".." entry listed that does nothing when
selected, so hide it.
This is a BSD extension also present in glibc and uClibc. Not all libc
implementations and not all file systems support it, so we keep the
stat-based code as a fallback.
In the STL, 'at' will perform range checking while operator[] will not.
Since GMenu2X doesn't use exceptions, range checking is not possible,
so 'at' and operator[] were identical.
When scanning multiple directories in succession, it's possible that
in some of them no matches are found. Avoid moving all pre-existing
entries back and forth in that case.
Also use move instead of copy for transferring the pre-existing
entries from the vector to the set.
The special case is not necessary for correctness. It would help
performance in theory, but it seems very unlikely that any code would
request a directory scan when it interested in neither the subdirs nor
the files in that directory.
Instead of splitting the filter for every file in FileLister::browse,
the filter is split immediately in FileLister::setFilter, improving
performance.
getFilter is removed because it was unused. This also removes the need
to update the return type to 'const std::vector&' in the method and
rewrite its callers.
The constructor now has zero arguments. showDirectories and showFiles
are now set using setter methods.
FileLister::browse is now the sole way to start a scan for files and
directories, replacing the initial path in the constructor and the
setPath method. It allows merging results from multiple directories
as before.
This is all to make explicit how many times the costly task of browsing
a directory is actually carried out.
The empty "" filter was previously matching all the files; since
a few commits it now matches the files without extensions. The
new "*" filter allows again to match all files.
tolower() will trigger an assertion failure in the case where the
string contains UTF-8 codes. This is not a problem as only the
file extension needs to be processed, and that one should contain
only ASCII.
This is useful when the files/directories lists are not cleared; then it is possible to define priorities between the files.
For instance, the skin "Default" will be shown only once, even if the directory "Default" exists both in the system and the user directories.
As the skin and translation loading functions does check both directories, there is no problem in doing that.
If set to "false", the previous list of files/directories won't be cleared when browsing another directory.
It will allow us to have file choosers that list files contained on different directories.
