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Bugfix: Text selection

This commit is contained in:
Jakub Melka 2020-12-13 16:19:59 +01:00
parent a6ce36a00c
commit 9b9734ffd1
1 changed files with 36 additions and 2 deletions
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38
PdfForQtLib/sources/pdftextlayout.cpp
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@ -338,12 +338,16 @@ PDFTextSelection PDFTextLayout::createTextSelection(PDFInteger pageIndex, const
QRectF rect(xMin, yMin, xMax - xMin, yMax - yMin);
QPainterPath rectPath;
rectPath.addRect(rect);
QPainterPath intersectionPath = block.getBoundingBox().intersected(rectPath);
const QPainterPath& boundingBoxPath = block.getBoundingBox();
QPainterPath intersectionPath = boundingBoxPath.intersected(rectPath);
if (!intersectionPath.isEmpty())
{
QRectF intersectionRect = intersectionPath.boundingRect();
Q_ASSERT(intersectionRect.isValid());
bool isTopPointAboveText = false;
bool isBottomPointBelowText = false;
const PDFTextLines& lines = block.getLines();
auto itLineA = std::find_if(lines.cbegin(), lines.cend(), [pointA](const PDFTextLine& line) { return line.getBoundingBox().contains(pointA); });
auto itLineB = std::find_if(lines.cbegin(), lines.cend(), [pointB](const PDFTextLine& line) { return line.getBoundingBox().contains(pointB); });
@ -361,10 +365,24 @@ PDFTextSelection PDFTextLayout::createTextSelection(PDFInteger pageIndex, const
{
// Otherwise points are not in the same line. Then start point will be
// point top of the second point. Bottom point will mark end of selection.
if (pointA.y() > pointB.y())
if (pointA.y() < pointB.y())
{
std::swap(pointA, pointB);
}
QRectF rect = boundingBoxPath.controlPointRect();
// If start point is above the text block, move start point to the left.
if (rect.bottom() < pointA.y())
{
pointA.setX(rect.left());
isTopPointAboveText = true;
}
if (rect.top() > pointB.y())
{
pointB.setX(rect.right());
isBottomPointBelowText = true;
}
}
// Now, we have pointA as start point and pointB as end point. We must found
@ -409,6 +427,22 @@ PDFTextSelection PDFTextLayout::createTextSelection(PDFInteger pageIndex, const
}
}
if (isTopPointAboveText && !lines.empty())
{
ptrA.pageIndex = pageIndex;
ptrA.blockIndex = blockId;
ptrA.lineIndex = 0;
ptrA.characterIndex = 0;
}
if (isBottomPointBelowText && !lines.empty())
{
ptrB.pageIndex = pageIndex;
ptrB.blockIndex = blockId;
ptrB.lineIndex = lines.size() - 1;
ptrB.characterIndex = lines.back().getCharacters().size() - 1;
}
// If we have filled the pointers, add them to the selection
if (ptrA.isValid() && ptrB.isValid())
{