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This mainly takes CppEditorSupport apart.

* Parsing is now invoked by CPPEditorDocument itself by listening to
  QTextDocument::contentsChanged().

* Upon construction and destruction CPPEditorDocument creates and
  deletes an EditorDocumentHandle for (un)registration in the model
  manager. This handle provides everything to generate the working copy
  and to access the editor document processor.

* A CPPEditorDocument owns a BaseEditorDocumentProcessor instance that
  controls parsing, semantic info recalculation and the semantic
  highlighting for the document. This is more or less what is left from
  CppEditorSupport and can be considered as the backend of a
  CPPEditorDocument. CPPEditorDocument itself is quite small.

    * BuiltinEditorDocumentProcessor and ClangEditorDocumentProcessor
      derive from BaseEditorDocumentProcessor and implement the gaps.

    * Since the semantic info calculation was bound to the widget, it
      also calculated the local uses, which depend on the cursor
      position. This calculation got moved into the extracted class
      UseSeletionsUpdater in the cppeditor plugin, which is run once the
      cursor position changes or the semantic info document is updated.

    * Some more logic got extracted:
	- SemanticInfoUpdater (logic was in CppEditorSupport)
	- SemanticHighlighter (logic was in CppEditorSupport)

    * The *Parser and *Processor classes can be easily accessed by the
      static function get().

* CppHighlightingSupport is gone since it turned out to be useless.

* The editor dependency in CompletionAssistProviders is gone since we
  actually only need the file path now.

Change-Id: I49d3a7bd138c5ed9620123e34480772535156508
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

Change-Id: I554b5e9e3f1ef7c167fa45b5cd0c230fdf63073b
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

Change-Id: Ieff216017b9da1e6a12121688ea9572bdd81fd9b
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

Change-Id: I447acf28849bffb52c1e6b6eafdde221ec0b179e
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

This is the first step in actually making "closeEditor(s)" close editors
instead of documents.

Change-Id: I02761e0cef950b8fc093f65a90df04a9a7550681
Reviewed-by: Daniel Teske <daniel.teske@digia.com>
Reviewed-by: hjk <hjk121@nokiamail.com>

So far the pre-compiled headers were processed (thus defines from those
headers were visible), but the actual includes for the documents were
not added, which is necessary for lookup/completion.

Note that this will be only done if pre-compiled headers are not ignored
(Options > C++ > Code Model > [] Ignore pre-compiled headers).

Change-Id: I54a8e6b00597af164d958e3e9f2a1075ea187788
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

Instead of having two lists of paths, now only one list is used where
both include paths and framework paths can be mixed. This reflects the
way the compiler is invoked, and retains the (correct) search order.

Task-number: QTCREATORBUG-11599
Change-Id: I373953e3e305df5b7a0d10920e12d146584adf9f
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>

...since it does quite a bit more than only preprocessing, as the name
suggests. We use that class to process source files in general. The
output is not a preprocessed source, but a set of CPlusPlus::Documents
with symbols.

Change-Id: I787d0f22f9f042ddf0c99e8c2f0bdb9aa7001735
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

...instead CppModelManager::snapshot().document().

Change-Id: If79bc03d062d309bbf6d4b229255ba281cddf8d5
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

Change-Id: I9843c4163aad3fa3f1bfa33060c76328fc2dc25a
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

Change-Id: I3e703c923f6e1a14a89c76f394a070184db0c7bf
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>

Move item model implementation to private, adjust user code.

Change-Id: Ifbe94e7c7b9b1e8be1b4c531958dbd7a9413af13
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

Change-Id: Ib5423fdd064e4546f848c0b640b0ed0514c26d3a
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@digia.com>
Reviewed-by: Kai Koehne <kai.koehne@digia.com>

The example project parts had no project file set and thus the "right"
project part could not be determined in cppeditor.cpp:718.

Change-Id: I088571e9d3c3c8790670bbdd8e68190835a85ad5
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

Closing an editor might trigger a timer which leads to the invocation of
the garbage collector. This is unfavourable for the plugin tests since a
test function closing an editor might influence a subsequent test
function (e.g. files get removed from the global snapshot although they
were added shortly before).

Change-Id: Ia80c11f99e2437fe145dc2d983b21962539b5181
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

* Unify class names
* Fix coding style

Change-Id: I7498192ba9e6b9fc0e97d3d4f0dbb30f1853a0c9
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

Move common functionality of the 12 test classes into base classes.

Change-Id: If64d3cec876807ac6f991151189860a99b8ff4ca
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

...when updating the code model.

Change-Id: Ifc55b7d0bb795b9cfd72465990991bc2cc907846
Reviewed-by: Christian Stenger <christian.stenger@digia.com>
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

So we can ignore possibly problematic toolchain-defines, while can still
unconditionally apply project-defines.

Change-Id: I7cb96f35a963d080011fe888ef71bfc098dd33ef
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>

Change-Id: Ifbc2adeff83cbef9841da872e15a5b9dd8379a3d
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

Deleting an editor while currentEditorChanged is apparently not a good
idea.
Use a queued connection instead.

This reverts commits 243a6259,
447c4ed3,
d9602ca5 and
31034870.

Change-Id: Iccbee25fb77714963faa6f7184d1f5f53ed348a6
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

Change-Id: I1884f6e61dcae95817da10f0ead67f2df99b4ec7
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

Change-Id: I371e986c9b41fec5cddf05e3f7849c5e0b9e6b69
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

Change-Id: I76d5e421258eda85907e56762a59894ce7f84f13
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

The UI side will come in another commit.

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

Task-number: QTCREATORBUG-476

Change-Id: I82ed92acdcda551d2c6a9ca221832ac20117a08f
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>

Change-Id: Ia2e4dc776d3040d2ccb13d9b029c2f0cc8db0fcd
Reviewed-by: Erik Verbruggen <erik.verbruggen@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>

Change-Id: Ia641c70f8c72cf762cf571cdd505385d28492b7c
Reviewed-by: Erik Verbruggen <erik.verbruggen@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>

Change-Id: I370f72fcf7a24216ee189979ce6b5c8bfc5f4140
Reviewed-by: David Schulz <david.schulz@digia.com>

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

Change-Id: Ie290c07c07c13134a57f328e9ae876b2af6974db
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

The soft links inside the framework can't be resolved.

Change-Id: I9f328bc074091236fb33eee63e725e49efeac5c9
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>

Change-Id: Icad8723e26f7f9d89098e04c09c9dbd2d5539902
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>

(a) The code model manager figures out by itself which files were added
    or removed from the project.

    If this was done successfully, check also the timestamp of the
    common files and reindex if necessary.

(b) A full reindexing is only triggered if the project configuration
    changes (defines, includes, framework paths).

(c) If project files were removed, the garbage collector is called.

Task-number: QTCREATORBUG-9730
Change-Id: Ib855614b070880576233a3525813617c967a72f3
Reviewed-by: Fawzi Mohamed <fawzi.mohamed@digia.com>

...except the configuration file if no projects are open. For this case
there is no need to keep the configuration file around.

Task-number: QTCREATORBUG-9829

Change-Id: I51b01b30c17cbc1ced491ef2c47c338dae6ed983
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

Currently GC() is invoked if
   - 5 CppEditors were closed or the last CppEditor was closed
   - a project is about to be removed
   - a session is about to be unloaded

Thus, for the following use cases, too much GC() calls (can) happen:
    - File > Close All
    - Close All Projects and Editors
    - Changing the session

Fixed by introducing a timer.

Change-Id: I9c984d9de735fc8c6ee77a518e9fb5b63dba5881
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

And use it where appropriate

Change-Id: I0f37b8aada6eaa9be6743724b91a59173a01cb0c
Reviewed-by: hjk <hjk121@nokiamail.com>
Reviewed-by: David Schulz <david.schulz@digia.com>

This introduces an API change for the project managers. Those are not
expected to call updateSourceFiles() anymore.

Task-number: QTCREATORBUG-9581
Change-Id: I77befd29fb851c9acf87204d571da00183c9cd05
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>