Utils: add convenience function to ChangeSet

Creating a QTextCursor just for the ChangeSet gives no benefit for the
calling code, but reduces the readability.

Change-Id: I34acb6083b6f7ab54fce042e29cd6e80498338ef
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/libs/utils/changeset.cpp

@@ -318,6 +318,12 @@ void ChangeSet::apply(QTextCursor *textCursor)
     m_cursor = nullptr;
 }
 
+void ChangeSet::apply(QTextDocument *document)
+{
+    QTextCursor c(document);
+    apply(&c);
+}
+
 QString ChangeSet::textAt(int pos, int length)
 {
     if (m_string) {

src/libs/utils/changeset.h

@@ -10,6 +10,7 @@
 
 QT_BEGIN_NAMESPACE
 class QTextCursor;
+class QTextDocument;
 QT_END_NAMESPACE
 
 namespace Utils {
@@ -76,6 +77,7 @@ public:
 
     void apply(QString *s);
     void apply(QTextCursor *textCursor);
+    void apply(QTextDocument *document);
 
 private:
     // length-based API.

src/plugins/cppeditor/cppcodestylesettingspage.cpp

@@ -76,8 +76,7 @@ static void applyRefactorings(QTextDocument *textDocument, TextEditorWidget *edi
     Utils::ChangeSet change = formatter.format(cppDocument->translationUnit()->ast());
 
     // Apply change
-    QTextCursor cursor(textDocument);
-    change.apply(&cursor);
+    change.apply(textDocument);
 }
 
 // ------------------ CppCodeStyleSettingsWidget

src/plugins/cppeditor/cppcompletion_test.cpp

@@ -135,8 +135,7 @@ public:
     {
         Utils::ChangeSet change;
         change.insert(m_position, QLatin1String(text));
-        QTextCursor cursor(m_textDocument);
-        change.apply(&cursor);
+        change.apply(m_textDocument);
         m_position += text.length();
     }
 

src/plugins/cppeditor/cpppointerdeclarationformatter_test.cpp

@@ -107,8 +107,7 @@ public:
         Utils::ChangeSet change = formatter.format(ast); // ChangeSet may be empty.
 
         // Apply change
-        QTextCursor changeCursor(qtextDocument);
-        change.apply(&changeCursor);
+        change.apply(qtextDocument);
 
         // Compare
         QCOMPARE(qtextDocument->toPlainText(), expectedSource);

src/plugins/qmljseditor/quicktoolbar.cpp

@@ -318,8 +318,7 @@ void QuickToolBar::removeProperty(const QString &propertyName)
             Utils::ChangeSet changeSet;
             Rewriter rewriter(m_doc->source(), &changeSet, m_propertyOrder);
             rewriter.removeBindingByName(initializer, propertyName);
-            QTextCursor tc(m_editorWidget->document());
-            changeSet.apply(&tc);
+            changeSet.apply(m_editorWidget->document());
         }
     }
 }