Unduplicate the implementations of next power of two

Qtbase contains four identical implementations of next power of two,
these should be shared and the implementation made available to other
qt modules, as it is also used many places outside of qtbase.

[ChangeLog][QtCore][QtMath] Introduced qNextPowerOfTwo methods.

Change-Id: Id23fbe5ad6bae647b30d5a4212c0330e48a50278
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
qdoc: Give documenter more control of linking

This update enables using the module name as the parameter
in square brackets for the \l command. You will use this
when your link goes to the wrong page. e.g. Suppose this
link command went to a page in QtGui instead of the page
where it is meant to go in QtQuick:

\l { mytarget } { the text for my link }

When a link goes to a page in the wrong module, it means
the target exists in more than one module and because qdoc
searches the modules in sequence and stops when it finds a
match, it might match the wrong target. This would be a
collision in the single tree version of qdoc, but now qdoc
builds a separate tree for each module. Since you know
which module you want your link to go to, put the module
name in square brackets as the first parameter, like this:

\l [QtQuick] { mytarget } { the text for my link }

Now qdoc will only search for mytarget in the tree for
the QtQuick module.

The \target command can now be used anywhere. It has not
been tested in all possible locations, but it works in
the places where people have asked why it doesn't work there.

There will be a further update to complete this task for
implementing the other types of parameters that can be in
the square brackets.

Task-number: QTBUG-39221
Change-Id: I2db4fdd0319ff272ec1d2fa9dc396f14599d80f9
Reviewed-by: Martin Smith <martin.smith@digia.com>
Export QStateMachine running property.

It is needed to control a QStateMachine object from QML.

Change-Id: I19271d97718af2d688c477647d6341f70fdef3ea
Reviewed-by: Alan Alpert <aalpert@blackberry.com>
Improve docs for QWidget::accessibleName/Description

Change-Id: Ie898c49ed10b9598a0482ecadb18bbadb586d7a9
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Update doc: match actual compact JSON output

Task-number: QTBUG-36682
Change-Id: I0fca746a7838cce49efc243a242bb9bb7119bd9e
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
Fix crash when inserting the same instance widget more than once

Task-number: QTBUG-39324
Change-Id: Ib1e0e107cd411311344aa5d85c3ca4c34211448b
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>
Set fallback for QFont::System to be MS Sans Serif and not Arial

The system font for Windows should be MS Sans Serif which is what Qt 4 was
using and not Arial.

Change-Id: If3ed55bce87f6376b2897f1fc487bbc0627d1799
Reviewed-by: Pierre Rossi <pierre.rossi@gmail.com>
Disable automatic use of pch for MinGW

Revert cb09e1e88944e1ab9b0d0 for MinGW. gcc on Windows reproducably crashes
when the pre-compiled header becomes big enough ...

Change-Id: Icd5a3dfbe59f5ff5c78832e7b4436d0f1cfa1031
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Silence warnings about not supporting setMask on platforms like eglfs

Showing warnings based on an (otherwise unused) WindowMasks platform capability
is wrong. The default implementation of setMask() shows a warning anyway so it
is safe to call it in any case.

On top of this, platforms like eglfs may want to avoid showing any warnings,
since they  are completely useless for end users and pollute their debug
output and Creator panes. The standard way is to provide an empty implementation
for the function. This cannot work however if there are hardcoded warnings
generated in the common widget code.

Change-Id: I842a96b5b84c50b7caa59bdd48107785b21ab5af
Reviewed-by: Paul Olav Tvete <paul.tvete@digia.com>
Fix inconsistent export in QPixmapIconEngine

Removes "warning C4273: 'operator <<' : inconsistent dll linkage" under
MSVC2013.

Change-Id: I463441802a76f02db329631947232c70a85ae9e7
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
Accessibility: improve text attribute ranges

Improve consistency and use QTextDocument functions to find ranges
instead of coming up with our own scheme. This is important since
QCursor's char format depends on block positions.

Change-Id: I94eb137882dc6b5f7b01fa7693b4a536cc48d02a
Reviewed-by: Pierre Rossi <pierre.rossi@gmail.com>