Don't create glyphs for truncated text.

Instead of positioning truncated lines far out of the way where they
won't be seen, simply skip them when creating the glyph node.

Change-Id: I83bd8f76619d822fb22ec2ebd8c1e45c45b8b990
Reviewed-by: Yann Bodson <yann.bodson@nokia.com>

1 files changed, 7 insertions, 2 deletions

diff --git a/src/quick/items/qquicktextnode.cpp b/src/quick/items/qquicktextnode.cpp
index 81340d6e66..597ebc47e0 100644
--- a/src/quick/items/qquicktextnode.cpp
+++ b/src/quick/items/qquicktextnode.cpp
@@ -1292,7 +1292,8 @@ void QQuickTextNode::addTextLayout(const QPointF &position, QTextLayout *textLay
                                 QQuickText::TextStyle style, const QColor &styleColor,
                                 const QColor &anchorColor,
                                 const QColor &selectionColor, const QColor &selectedTextColor,
-                                int selectionStart, int selectionEnd)
+                                int selectionStart, int selectionEnd,
+                                int lineStart, int lineCount)
 {
     SelectionEngine engine;
     engine.setTextColor(color);
@@ -1307,7 +1308,11 @@ void QQuickTextNode::addTextLayout(const QPointF &position, QTextLayout *textLay
     QVarLengthArray<QTextLayout::FormatRange> colorChanges;
     mergeFormats(textLayout, &colorChanges);
 
-    for (int i=0; i<textLayout->lineCount(); ++i) {
+    lineCount = lineCount >= 0
+            ? qMin(lineStart + lineCount, textLayout->lineCount())
+            : textLayout->lineCount();
+
+    for (int i=lineStart; i<lineCount; ++i) {
         QTextLine line = textLayout->lineAt(i);
 
         int start = line.textStart();