...for reading not already opened files.

This partly reverts commit f7c68f6b. In case TextFileFormat::detect()
fails, the user configurable editor manager's codec is used instead of
QTextCodec::codecForLocale().

Adds also a qWarning() to easier detect encoding errors.

Task-number: QTCREATORBUG-10378

Change-Id: I0fa4e6b898ed090d85414ce2a001f11b115a42d3
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Eike Ziller <eike.ziller@digia.com>
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

This static function got moved into a base class.

Change-Id: I0b72f324bd52421388c7566dc4fd115a9b27ea7f
Reviewed-by: David Schulz <david.schulz@digia.com>

Task-number: QTCREATORBUG-10280

Change-Id: Ibc6ffeedb97a31a35a2d1f00625506f844692e16
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>

The UI side will come in another commit.

Change-Id: I1038a438587fe4cef70408f7f627d08837fc192d
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>

If two files from different (sub-)projects include the same header file,
and the defined macros differ for both files, the header file will be
parsed with only the appropriate macros for the including file.

Task-number: QTCREATORBUG-9802
Task-number: QTCREATORBUG-1249

Change-Id: I560490afa287b3bb1e863bce1bb4f57af36ad56e
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>

Temporary fix: if a single byte is found with the highest bit set, then
convert from utf8 to latin1. This can be removed when the lexer can
handle multi-byte characters.

Task-number: QTCREATORBUG-10141
Change-Id: I36a17aa18bd1b2378f12d0cecf4fd4957b38d8f2
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

These not only take less space than UTF-16 encoded QStrings, but due to
the caching in the CppEditorSupport also take less time to build.

This patch also fixes a number of possible encoding issues, where files
and constant strings were (falsely) assumed to be UTF-8.

Change-Id: Ib6f91c9a94ebed5b5dfbd4eb2998825c62c72784
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>
Reviewed-by: hjk <hjk121@nokiamail.com>

Change-Id: I3255a0150cd9a730336456c5a9f986eb74fefbff
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>

Change-Id: Ia36e7e7142dbc030a428369ed04e76e70e8eef0b
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

Change-Id: Ic7e634e4249fb64edbc2daceb65ec8e9b5f0f8b9
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
Reviewed-by: Aurindam Jana <aurindam.jana@digia.com>

* const correctness
* 100 columns
* superfluous curly braces
* include order
* old qDebugs()

Change-Id: Id8012d3cf4e292b671cdbc1952ff13dde316791e
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

Change-Id: I96486983460bb72dc7b7fa993863b2938e99a8b4
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

The working copy contains the artificial ui_* files and therefore we
have to consider it while resolving include files.

Task-number: QTCREATORBUG-9683
Change-Id: Icb3387b4cd885b3652bae3f1da465d3e0f633332
Reviewed-by: Christian Stenger <christian.stenger@digia.com>
Reviewed-by: Eike Ziller <eike.ziller@digia.com>
Reviewed-by: Daniel Teske <daniel.teske@digia.com>
Reviewed-by: Robert Loehning <robert.loehning@digia.com>
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

Change-Id: Id107b6c1f34f594c5a01502c156963c964235ed7
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

Change-Id: Ib61197da939165d24b99e40f29f9de13d109e044
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@digia.com>
Reviewed-by: hjk <hjk121@nokiamail.com>

Resetting the environment (after each *.cpp file) did not clear the
already seen files (m_included). Because of that the succeeding header
files were not parsed correctly - the environments of the mistakenly
already seen header files were not merged in.

Note that this change slow downs the parsing/indexing of files to its
original speed, as it was before the problematic commit (and it is in
2.7):

    commit 82e34709
    C++: Untangle include file resolving from loading.

Task-number: QTCREATORBUG-9205
Change-Id: Iea57b7c59ea04a3c8843fd1291f4c375382958fc
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

Change-Id: I399d667a1fccb376fadbd6ab8fbba243e86d8f4b
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>