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XFA: layout left-to-right, right-to-left processing

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Jakub Melka 2021-12-26 16:47:06 +01:00
parent 2209c04f48
commit 5e48110b94
1 changed files with 73 additions and 5 deletions
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78
Pdf4QtLib/sources/pdfxfaengine.cpp
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@ -9871,7 +9871,8 @@ private:
/// Maximal size of item
QSizeF maxSize;
QSizeF adjustNominalExtentSize(const QSizeF size);
QSizeF adjustNominalExtentSize(const QSizeF size) const;
QSizeF getSizeForLayout() const;
};
template<typename Node>
@ -10401,8 +10402,40 @@ void PDFXFALayoutEngine::layoutFlow(LayoutParameters& layoutParameters, bool bre
break;
case xfa::XFA_BaseNode::LAYOUT::Lr_tb:
// TODO: Implement Lr_Tb
{
// Left-to-right, top to bottom layout
Layout finalLayout;
PDFInteger targetPageIndex = sourcePageIndex + pageOffset;
finalLayout.pageIndex = targetPageIndex;
PDFReal x = 0.0;
PDFReal y = 0.0;
PDFReal maxW = 0.0;
PDFReal maxH = 0.0;
QSizeF size = layoutParameters.sizeInfo.getSizeForLayout();
for (Layout& layout : layouts)
{
if (x + layout.nominalExtent.width() > size.width())
{
// New line
y += maxH;
x = 0.0;
maxH = 0.0;
}
layout.translate(x, y);
x += layout.nominalExtent.width();
maxW = qMax(maxW, x);
maxH = qMax(maxH, layout.nominalExtent.height());
finalLayout.items.insert(finalLayout.items.end(), layout.items.begin(), layout.items.end());
}
finalizeAndAddLayout(captionMargins, finalLayout, layoutParameters, QSizeF(maxW, y));
break;
}
case xfa::XFA_BaseNode::LAYOUT::Rl_row:
{
@ -10412,8 +10445,38 @@ void PDFXFALayoutEngine::layoutFlow(LayoutParameters& layoutParameters, bool bre
}
case xfa::XFA_BaseNode::LAYOUT::Rl_tb:
// TODO: Implement Rl_tb
{
// Left-to-right, top to bottom layout
Layout finalLayout;
PDFInteger targetPageIndex = sourcePageIndex + pageOffset;
finalLayout.pageIndex = targetPageIndex;
QSizeF size = layoutParameters.sizeInfo.getSizeForLayout();
PDFReal x = size.width();
PDFReal y = 0.0;
PDFReal maxH = 0.0;
for (Layout& layout : layouts)
{
if (x - layout.nominalExtent.width() < 0.0)
{
// New line
y += maxH;
x = size.width();
maxH = 0.0;
}
x -= layout.nominalExtent.width();
layout.translate(x, y);
maxH = qMax(maxH, layout.nominalExtent.height());
finalLayout.items.insert(finalLayout.items.end(), layout.items.begin(), layout.items.end());
}
finalizeAndAddLayout(captionMargins, finalLayout, layoutParameters, QSizeF(size.width(), y));
break;
}
case xfa::XFA_BaseNode::LAYOUT::Row:
{
@ -10455,7 +10518,7 @@ void PDFXFALayoutEngine::layoutFlow(LayoutParameters& layoutParameters, bool bre
{
finalizeAndAddLayout(captionMargins, finalLayout, layoutParameters, QSizeF(maxW, y));
// Update page offets and maximal height
// Update page offsets and maximal height
++pageOffset;
++targetPageIndex;
if (targetPageIndex < PDFInteger(m_pages.size()))
@ -12628,7 +12691,7 @@ PDFXFALayoutEngine::SizeInfo PDFXFALayoutEngine::getSizeInfo(const Node* node) c
return info;
}
QSizeF PDFXFALayoutEngine::SizeInfo::adjustNominalExtentSize(const QSizeF size)
QSizeF PDFXFALayoutEngine::SizeInfo::adjustNominalExtentSize(const QSizeF size) const
{
PDFReal minW = origSize.width();
PDFReal minH = origSize.height();
@ -12672,4 +12735,9 @@ QSizeF PDFXFALayoutEngine::SizeInfo::adjustNominalExtentSize(const QSizeF size)
return QSizeF(correctedWidth, correctedHeight);
}
QSizeF PDFXFALayoutEngine::SizeInfo::getSizeForLayout() const
{
return adjustNominalExtentSize(maxSize);
}
} // namespace pdf