TextEditor: avoid autoIndent when using default TextIndenter

Most programming languages use indentation to group stuff. So if we have
no special language support for a text file it is useful to start a
newline on the same indent depth as the previous line. But if we trigger
an explicit reindent (default ctrl+i) we usually don't want to change
the indentation if we don't know exactly where it should end up. This
also applies to refactoring changes, for example from the lsp.

Change-Id: I8268dc88cbceddfc7112757fd7d2fef940ab9a39
Reviewed-by: Marcus Tillmanns <marcus.tillmanns@qt.io>

src/plugins/texteditor/textindenter.cpp

@@ -51,6 +51,15 @@ int TextIndenter::indentFor(const QTextBlock &block,
     return tabSettings.indentationColumn(previousText);
 }
 
+void TextIndenter::autoIndent(const QTextCursor &cursor,
+                              const TabSettings &tabSettings,
+                              int cursorPositionInEditor)
+{
+    Q_UNUSED(cursor);
+    Q_UNUSED(tabSettings);
+    Q_UNUSED(cursorPositionInEditor);
+}
+
 IndentationForBlock TextIndenter::indentationForBlocks(const QVector<QTextBlock> &blocks,
                                                        const TabSettings &tabSettings,
                                                        int /*cursorPositionInEditor*/)

src/plugins/texteditor/textindenter.h

@@ -26,6 +26,10 @@ public:
                   const TabSettings &tabSettings,
                   int cursorPositionInEditor = -1) override;
 
+    void autoIndent(const QTextCursor &cursor,
+                    const TabSettings &tabSettings,
+                    int cursorPositionInEditor = -1) override;
+
     IndentationForBlock indentationForBlocks(const QVector<QTextBlock> &blocks,
                                              const TabSettings &tabSettings,
                                              int cursorPositionInEditor = -1) override;