TextEditor: Optimize unindent backspace behavior

Only remove more than one character when the cursor is inside the
indentation in the beginning of the line. In all other cases always only
remove one character.

Fixes: QTCREATORBUG-30725
Change-Id: I973101a95768cdd8b1a318972f53423eb72eb157
Reviewed-by: Christian Stenger <christian.stenger@qt.io>
Reviewed-by: André Hartmann <aha_1980@gmx.de>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>

1 files changed, 1 insertions, 2 deletions

diff --git a/src/plugins/texteditor/texteditor.cpp b/src/plugins/texteditor/texteditor.cpp
index 3256ee91b7..280ca8e433 100644
--- a/src/plugins/texteditor/texteditor.cpp
+++ b/src/plugins/texteditor/texteditor.cpp
@@ -6876,8 +6876,7 @@ void TextEditorWidgetPrivate::handleBackspaceKey()
                 }
             }
         } else if (typingSettings.m_smartBackspaceBehavior == TypingSettings::BackspaceUnindents) {
-            const QChar previousChar = q->document()->characterAt(pos - 1);
-            if (!(previousChar == QLatin1Char(' ') || previousChar == QLatin1Char('\t'))) {
+            if (c.positionInBlock() > TabSettings::firstNonSpace(c.block().text())) {
                 if (cursorWithinSnippet)
                     c.beginEditBlock();
                 c.deletePreviousChar();