Fix undo/redo of single-command edit blocks

(with QTextCursor::beginEditBlock() and QTextCursor::endEditBlock())

Previously QTextDocument would treat single command blocks as if there
was no block, i.e. command compression would occur, causing
tst_QTextDocument::testUndoBlocks() to fail. The patch completes the
insufficient block-flag of QTextUndoCommand with an addition flag block_end.
The block-flag itself is renamed to block_part.

Reviewed-by: con

1 files changed, 3 insertions, 1 deletions

diff --git a/src/gui/text/qtextdocument_p.h b/src/gui/text/qtextdocument_p.h
index 55aa17e..363309c 100644
--- a/src/gui/text/qtextdocument_p.h
+++ b/src/gui/text/qtextdocument_p.h
@@ -139,7 +139,9 @@ public:
         MoveCursor = 1
     };
     quint16 command;
-    quint8 block; ///< All undo commands that have this set to true are combined with the preceding command on undo/redo.
+    uint block_part : 1; // all commands that are part of an undo block (including the first and the last one) have this set to 1
+    uint block_end : 1; // the last command in an undo block has this set to 1.
+    uint block_padding : 6; // padding since block used to be a quint8
     quint8 operation;
     int format;
     quint32 strPos;