CppEditor: Extract CppEditorDocument

This one will get some more functionality.

Change-Id: Ifba410e32f98c28cbfbb5a72493906ab3d681225
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

src/plugins/cppeditor/cppeditordocument.cpp

@@ -0,0 +1,87 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+****************************************************************************/
+
+#include "cppeditordocument.h"
+
+#include "cppeditorconstants.h"
+#include "cpphighlighter.h"
+
+#include <cpptools/cppcodeformatter.h>
+#include <cpptools/cpptoolsconstants.h>
+
+#include <QTextDocument>
+
+namespace CppEditor {
+namespace Internal {
+
+CPPEditorDocument::CPPEditorDocument()
+{
+    setId(CppEditor::Constants::CPPEDITOR_ID);
+    connect(this, SIGNAL(tabSettingsChanged()),
+            this, SLOT(invalidateFormatterCache()));
+    connect(this, SIGNAL(mimeTypeChanged()),
+            this, SLOT(onMimeTypeChanged()));
+    setSyntaxHighlighter(new CppHighlighter);
+    onMimeTypeChanged();
+}
+
+bool CPPEditorDocument::isObjCEnabled() const
+{
+    return m_isObjCEnabled;
+}
+
+void CPPEditorDocument::applyFontSettings()
+{
+    if (TextEditor::SyntaxHighlighter *highlighter = syntaxHighlighter()) {
+        // Clear all additional formats since they may have changed
+        QTextBlock b = document()->firstBlock();
+        while (b.isValid()) {
+            QList<QTextLayout::FormatRange> noFormats;
+            highlighter->setExtraAdditionalFormats(b, noFormats);
+            b = b.next();
+        }
+    }
+    BaseTextDocument::applyFontSettings(); // rehighlights and updates additional formats
+}
+
+void CPPEditorDocument::invalidateFormatterCache()
+{
+    CppTools::QtStyleCodeFormatter formatter;
+    formatter.invalidateCache(document());
+}
+
+void CPPEditorDocument::onMimeTypeChanged()
+{
+    const QString &mt = mimeType();
+    m_isObjCEnabled = (mt == QLatin1String(CppTools::Constants::OBJECTIVE_C_SOURCE_MIMETYPE)
+                   || mt == QLatin1String(CppTools::Constants::OBJECTIVE_CPP_SOURCE_MIMETYPE));
+}
+
+} // namespace Internal
+} // namespace CppEditor