The scanning phase was in some cases insanely long.
Reason was that Creator feeds wrong paths to the
CppModelManager, for example "/".

The scanning phase did what it was told to: scan that whole
Harddrive.

This patch makes sure that the scanning is not done for "/"

Done-With: Roberto

(The other Samba is meant. The slow one, not the nice one.)

Creator manages to feed the CppModelManager with all kinds of
wrong include paths. That is usually not a big issue as long
as that path is not a simple "/".

CppManager appended a separator to all incoming include paths.
And when the above "/" was passed in, we had (on my machine)
7 seconds of Samba Network lookup, multiple times during a
parse. And the sad thing was that my dear colleagues in the
Intranet did not even have the searched-for header files on
their shared folders.

This patch makes sure that a separator is only appended if
the path does not already end with one.

The real core of the issue (wrong include paths from Creator)
still needs to be fixed.

Done-with: Roberto Raggi

Reviewed-by: Roberto Raggi

Also removed TokenUnderCursor as it's functionality is in the token cache.

Reviewed-by: ckamm

This reverts commit c2393df0.

This should speed things up a bit, because before, the line was tokenized at
least 3 times.

It seems that the mime type db got pretty slow, and reordering files
can take minutes.

The Parentheses, TextBlockUserData and TextEditDocumentLayout classes
and their member function implementations were spread around the
BaseTextEditor class. Moving them to their own file to make the code a
bit better organized.

Reviewed-by: mae

Task-Nr: QTCREATORBUG-1151

Allow include paths with any suffix, and do some sanity check for
existence of paths.

Reviewed-by: Thorbjørn Lindeijer

Task-number: QTCREATORBUG-1102
Reviewed-by: Roberto Raggi

Fixed crash in FindUsages on a dirty file in a large project, which is saved
while the FindUsages is still running.

Reviewed-by: Friedemann Kleint

Introduce multithread-locking to Core::MimeDatabase as it is
invoked from the indexer thread to sort apart headers and sources.
Add a convenience to operate on a sequence to avoid locking for each
file.

foreach()-Loops.

Reviewed-by: Erik Verbruggen

In preparation for finding macro uses.

* Macro: add offset and length
* MacroUse: add line
* Document: add convenience functions for finding a macro definition, use
  or undefined use at a given location.

Reviewed-by: Erik Verbruggen

__stdcall for all compilers (MSVC and MinGW, possibly others may use it)
__w64 is MSVC only, deprecated there, but still used in some places

Reviewed-By: Roberto Raggi
(cherry picked from commit 5832c6b5)