- fix memory leak in find-usages
- do not retain snapshot in search history
- when an editor is invisible for more than 2 minutes, release the
  backing snapshot

Retaining snapshots will retain their documents, and if done for too
long, the memory consumption might grow. This is especially the case
when switching to a different kit (Qt version): in that case, the new
versions of headers will be indexed, while the old ones stay around.

Task-number: QTCREATORBUG-5583
Task-number: QTCREATORBUG-7645
Task-number: QTCREATORBUG-9842

Change-Id: I045eda1565e0a3fa702baeffaab9c12662f90289
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>
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>

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>

This is step 1 of 2 for merging the various provider factories into a
single class. Merging has the advantage that selecting based on editor
(content) mime-type only has to select one class, instead of re-doing
the selection for each class separately.

Change-Id: I11f815151bd4769ae6028b636793d6a80d02e202
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>

And not from the global object pool. This way, the editors that have
different highlighters for various language dialects, or editors that
support multiple languages in a single editor, can decide themselves on
what CompletionAssistProvider to provide.

Change-Id: Ieebc4a8e7b3de6470fdb8103035aa3b8b2ba6598
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>

Change-Id: I38cc0e55348cac0245d2ab8f3e39c68de76e3e6d
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>

When a reloading operation was in progress, CppEditorSupport::contents()
could return a partly reloaded file to the code model leading to parse
errors and incomplete highlighting.

Fixed by checking if the file is currently being reloaded.

Task-number: QTCREATORBUG-9382

Change-Id: Iee97e10444763c0cbf481132afa4617c5cdbd15c
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

If the file type (mime type) of an editor changes, it might need a
different kind of highlighter/highlighting-support.

Change-Id: I470dbf69e71856c9593d201416c4d4bd2958aaec
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>

Now recalculateSemanticInfoNow is called only once instead of three
times when a new editor is opened/created.

Change-Id: Ife84fc9ca90cdbf2a417123e6a2b9e1e068dfdc4
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

Also remove the introduced functions in CppEditorSupport. We can just
wait until the document is "Full Checked" via Document::checkmode().

Change-Id: I31d23016f5aa5d3c37e8e05078436ab901bfb2d7
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

Test cases are examples from

    Working Draft, Standard for Programming Language C++
    Document Number: N3242=11-0012

Change-Id: I624c315943d6a00e821abb52eef6e0ff4a40f0d7
Reviewed-by: Przemyslaw Gorszkowski <pgorszkowski@gmail.com>
Reviewed-by: David Schulz <david.schulz@digia.com>

CppTools.lib(CppTools.dll) : error LNK2005: "public: virtual __thiscall
  QFutureInterface<class TextEditor::HighlightingResult>::~QFutureInterface<class TextEditor::HighlightingResult>(void)"
  (??1?$QFutureInterface@VHighlightingResult@TextEditor@@@@UAE@XZ) already defined in moc_cppeditor.obj
   Creating library ..\..\..\lib\qtcreator\plugins\QtProject\CppEditor.lib and object
   ..\..\..\lib\qtcreator\plugins\QtProject\CppEditor.exp..\..\..\lib\qtcreator\plugins\QtProject\CppEditor.dll :
   fatal error LNK1169: one or more multiply defined symbols found

Change-Id: Id53a0f8a99dbd18a9cbdf2af57b4f3970f5c41a3
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>

- Moved document update handling into CppTools.
- Moved semantic info calculation into CppTools.
- Moved semantic highlighting into CppTools.

Change-Id: I253861bf074a64b1f657f7a4a8e6583871b5285f
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>

Ran script to remove inludes on a trial-and-error basis and
manually corrected it.

Change-Id: Ic8464ea084ca1ab401e9f4a7d0183b92b4038902
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

There were quite a few classes using CPlusPlus namespace in the
CppTools plugin. Rename them and do some other small namespace
related coding style fixups.

Change-Id: I093fc1f3fc394fd9923e3f18d5f66522e288f21d
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

... and adjust INCLUDEPATH accordingly.

while i'm at messing with include statements, also re-order the include
blocks according to policy and sort them within bigger blocks.

Change-Id: I7762abfd7c4ecf59432b99db2f424e4fa25733a5
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

Reduce the padding in some often-used structs for 64bit machines.
32bit machines should also profit from most changes, but to a
lesser degree.

Change-Id: Ic4c67b94e962731de4f31164c52a372d78944ccc
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>

Change-Id: Ic6a9ff0359625021ebc061d22db6811814534205
Reviewed-by: Kai Koehne <kai.koehne@digia.com>

Change-Id: Ice592c6de9951ee3b2c4cb52ed0bb3b6770e0825
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

Change-Id: I7134d7de30bcf9f9dcfad42520dd45ee083a852d
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>

Change-Id: I990fdf5411153041c6b4c62f31b453342d59de53
Reviewed-by: Eike Ziller <eike.ziller@nokia.com>

Getting the #include directives ready for Qt5. This includes the
new-project wizards.

Change-Id: Ia9261f1e8faec06b9285b694d2b7e9a095978d2b
Reviewed-by: Eike Ziller <eike.ziller@nokia.com>

This way the editor does not need to know all the details of
instantiating or maintaining classes for highlighting and/or completion,
it can just ask the model manager. The change also enables different
highlighting- or completion-engines without changes to the cppeditor.

Change-Id: I8000d9d9fe446b292defddb2295493cf77d0f14a
Reviewed-by: Leandro Melo <leandro.melo@nokia.com>

Change-Id: I2b72b34c0cfeafc8bdbaf49b83ff723544f2b6e2
Reviewed-by: Daniel Teske <daniel.teske@nokia.com>

Change-Id: If18afb5d4665924e7d9250dccbc60a65e6daa75e
Reviewed-by: Eike Ziller <eike.ziller@nokia.com>

Change-Id: I8b73d583be1ee7183f4074bce49d5390e38631a2

We use the latter style everywhere else to signify the end of a namespace block.

Reviewed-by: hjk

Introduce some more private classes for the coreplugin,
use header include convention
<QtModule/QClass>, de-qobjectify VariableManager.

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.