Many singletons have their own instance() method, in which case there is
no need to use ICore::instance() to get access to them.

replace ExtensionSystem::PluginManager::instance()->getObject<Core::ICore>() by Core::ICore::instance()

forward declaration is sufficient.

RevBy: Matthias

Pop it upwards when it would otherwise go below the screen and shift it
to the left when it would otherwise exit the screen on the right.

The mouse handling for code folding wasn't deactivated when the code
folding markers were hidden.

Reviewed-by: mae

in ifdefed out sections

when opening files from the C++ editor (e.g. when the user press F2 on #include <QMutex>).

support statements later.

Doesn't look right, since it causes some background to show through
between the indicator and the scrollbar.

    enum ExtraSelectionKind {
        CurrentLineSelection,
        ParenthesesMatchingSelection,
        CodeWarningsSelection,
        CodeSemanticsSelection,
        OtherSelection,
        NExtraSelectionKinds
    };
    void setExtraSelections(ExtraSelectionKind kind, const QList<QTextEdit::ExtraSelection> &selections);
    QList<QTextEdit::ExtraSelection> extraSelections(ExtraSelectionKind kind) const;

This is mainly for the benefit of the cppmodelmanager.

new signal: BaseTextEditor::lineContextMenuRequested(TextEditor::ITextEditor *editor, int line, QMenu *menu);

To be useful and used by the bookmarkmanager, this has to move to ITextEditor.

Invokable with 'c', currently shows all classes it can find.