diff options
author | Konstantin Ritt <ritt.ks@gmail.com> | 2014-04-04 07:31:24 +0300 |
---|---|---|
committer | The Qt Project <gerrit-noreply@qt-project.org> | 2014-04-04 19:32:21 +0200 |
commit | 330f6e359897f77cf50f67141d09e94c371121ff (patch) | |
tree | 239a336b0270b45c682070092e76d9fdf056d1c0 /src/gui/text/qtextengine.cpp | |
parent | 47056e78d3d963272e449e8f917ae3208b7aa940 (diff) |
QTextLayout: Fix cursor movement from invalid position
Actually guarantee cursor doesn't move in this case for both logical
and visual modes (just what the documentation says we already do ;)
Change-Id: Iabdca7aa1d205672386a0095e3487e585611cdb5
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Diffstat (limited to 'src/gui/text/qtextengine.cpp')
-rw-r--r-- | src/gui/text/qtextengine.cpp | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/src/gui/text/qtextengine.cpp b/src/gui/text/qtextengine.cpp index 53fd37abba..35950c709b 100644 --- a/src/gui/text/qtextengine.cpp +++ b/src/gui/text/qtextengine.cpp @@ -3138,11 +3138,12 @@ int QTextEngine::positionInLigature(const QScriptItem *si, int end, int QTextEngine::previousLogicalPosition(int oldPos) const { const QCharAttributes *attrs = attributes(); - if (!attrs || oldPos < 0) + int len = block.isValid() ? block.length() - 1 + : layoutData->string.length(); + Q_ASSERT(len <= layoutData->string.length()); + if (!attrs || oldPos <= 0 || oldPos > len) return oldPos; - if (oldPos <= 0) - return 0; oldPos--; while (oldPos && !attrs[oldPos].graphemeBoundary) oldPos--; @@ -3224,8 +3225,7 @@ int QTextEngine::beginningOfLine(int lineNum) int QTextEngine::positionAfterVisualMovement(int pos, QTextCursor::MoveOperation op) { - if (!layoutData) - itemize(); + itemize(); bool moveRight = (op == QTextCursor::Right); bool alignRight = isRightToLeft(); @@ -3233,7 +3233,8 @@ int QTextEngine::positionAfterVisualMovement(int pos, QTextCursor::MoveOperation return moveRight ^ alignRight ? nextLogicalPosition(pos) : previousLogicalPosition(pos); int lineNum = lineNumberForTextPosition(pos); - Q_ASSERT(lineNum >= 0); + if (lineNum < 0) + return pos; QVector<int> insertionPoints; insertionPointsForLine(lineNum, insertionPoints); @@ -3256,6 +3257,8 @@ int QTextEngine::positionAfterVisualMovement(int pos, QTextCursor::MoveOperation if (lineNum > 0) return alignRight ? beginningOfLine(lineNum - 1) : endOfLine(lineNum - 1); } + + break; } return pos; |