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https://github.com/JakubMelka/PDF4QT.git
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XFA: table layout
This commit is contained in:
Jakub Melka
parent
187cfc6d4b
commit
df360773f2
@ -200,6 +200,41 @@ public:
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PDFReal getValuePt(const XFA_ParagraphSettings* paragraphSettings) const;
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static bool parseMeasurement(QString measurementText, XFA_Measurement& measurement)
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{
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XFA_Measurement::Type measurementType = XFA_Measurement::Type::in;
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constexpr std::array measurementUnits = {
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std::make_pair(XFA_Measurement::Type::in, "in"),
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std::make_pair(XFA_Measurement::Type::pt, "pt"),
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std::make_pair(XFA_Measurement::Type::cm, "cm"),
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std::make_pair(XFA_Measurement::Type::mm, "mm"),
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std::make_pair(XFA_Measurement::Type::em, "em"),
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std::make_pair(XFA_Measurement::Type::percent, "%")
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};
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for (const auto& measurementUnit : measurementUnits)
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{
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QLatin1String unit(measurementUnit.second);
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if (measurementText.endsWith(unit))
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{
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measurementType = measurementUnit.first;
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measurementText.chop(unit.size());
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break;
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}
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}
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bool ok = false;
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PDFReal value = measurementText.toDouble(&ok);
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if (ok)
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{
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measurement = XFA_Measurement(value, measurementType);
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}
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return ok;
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}
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private:
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PDFReal m_value;
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Type m_type;
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@ -295,6 +330,8 @@ public:
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attribute = XFA_Attribute<PDFInteger>(element.attribute(attributeFieldName, defaultValue).toInt());
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}
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static void parseAttribute(const QDomElement& element,
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QString attributeFieldName,
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XFA_Attribute<XFA_Measurement>& attribute,
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@ -303,34 +340,11 @@ public:
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attribute = XFA_Attribute<XFA_Measurement>();
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QString measurement = element.attribute(attributeFieldName, defaultValue);
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XFA_Measurement::Type measurementType = XFA_Measurement::Type::in;
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constexpr std::array measurementUnits = {
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std::make_pair(XFA_Measurement::Type::in, "in"),
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std::make_pair(XFA_Measurement::Type::pt, "pt"),
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std::make_pair(XFA_Measurement::Type::cm, "cm"),
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std::make_pair(XFA_Measurement::Type::mm, "mm"),
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std::make_pair(XFA_Measurement::Type::em, "em"),
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std::make_pair(XFA_Measurement::Type::percent, "%")
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};
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for (const auto& measurementUnit : measurementUnits)
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XFA_Measurement value;
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if (XFA_Measurement::parseMeasurement(measurement, value))
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{
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QLatin1String unit(measurementUnit.second);
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if (measurement.endsWith(unit))
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{
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measurementType = measurementUnit.first;
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measurement.chop(unit.size());
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break;
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}
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}
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bool ok = false;
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PDFReal value = measurement.toDouble(&ok);
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if (ok)
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{
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attribute = XFA_Attribute<XFA_Measurement>(XFA_Measurement(value, measurementType));
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attribute = XFA_Attribute<XFA_Measurement>(std::move(value));
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}
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}
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@ -9833,6 +9847,21 @@ private:
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std::for_each(items.begin(), items.end(), [presence](auto& item) { item.updatePresence(presence); });
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}
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void resize(QSizeF newSize)
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{
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QSizeF oldSize = nominalExtent.size();
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nominalExtent.setSize(newSize);
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qreal diffX = newSize.width() - oldSize.width();
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qreal diffY = newSize.height() - oldSize.height();
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for (LayoutItem& layoutItem : items)
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{
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layoutItem.nominalExtent.setWidth(layoutItem.nominalExtent.width() + diffX);
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layoutItem.nominalExtent.setHeight(layoutItem.nominalExtent.height() + diffY);
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}
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}
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/// Page index (or, more precisely, index of content area)
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size_t pageIndex = 0;
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@ -9945,7 +9974,7 @@ private:
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/// Target layout must have positional layout type.
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/// \param sourceLayoutParameters Source layout
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/// \param targetLayoutParameters Target layout
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void layoutPositional(LayoutParameters& sourceLayoutParameters,
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bool layoutPositional(LayoutParameters& sourceLayoutParameters,
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LayoutParameters& targetLayoutParameters);
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LayoutParameters& getLayoutParameters() { return m_layoutParameters.top(); }
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@ -10044,6 +10073,7 @@ void PDFXFALayoutEngine::layout(LayoutParameters layoutParameters)
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LayoutParameters& currentLayoutParameters = getLayoutParameters();
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layoutFlow(layoutParameters);
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std::vector<Layout>& layout = currentLayoutParameters.layout;
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if (layoutParameters.nodeArea)
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{
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// Case 2)
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@ -10055,17 +10085,34 @@ void PDFXFALayoutEngine::layout(LayoutParameters layoutParameters)
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{
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layout.translate(x, y);
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}
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currentLayoutParameters.layout = std::move(layoutParameters.layout);
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layout.insert(layout.end(),
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std::make_move_iterator(layoutParameters.layout.begin()),
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std::make_move_iterator(layoutParameters.layout.end()));
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}
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else
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{
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// Case 3)
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layoutPositional(layoutParameters, currentLayoutParameters);
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if (!layoutPositional(layoutParameters, currentLayoutParameters))
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{
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// Not a positional layout
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layout.insert(layout.end(),
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std::make_move_iterator(layoutParameters.layout.begin()),
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std::make_move_iterator(layoutParameters.layout.end()));
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}
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}
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currentLayoutParameters.tableRows.insert(currentLayoutParameters.tableRows.end(),
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std::make_move_iterator(layoutParameters.tableRows.begin()),
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std::make_move_iterator(layoutParameters.tableRows.end()));
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}
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void PDFXFALayoutEngine::layoutFlow(LayoutParameters& layoutParameters)
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{
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if (layoutParameters.layoutType == xfa::XFA_BaseNode::LAYOUT::Position)
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{
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return;
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}
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std::map<size_t, std::vector<Layout>> layoutsPerPage;
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for (Layout& layout : layoutParameters.layout)
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@ -10113,16 +10160,30 @@ void PDFXFALayoutEngine::layoutFlow(LayoutParameters& layoutParameters)
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case xfa::XFA_BaseNode::LAYOUT::Table:
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{
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if (layoutParameters.tableRows.empty())
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{
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// No table to lay out
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break;
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}
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std::vector<PDFReal> rowHeights(layoutParameters.tableRows.size(), 0.0);
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std::vector<PDFReal> columnWidths;
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size_t maxColumns = 0;
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for (size_t rowIndex = 0; rowIndex < layoutParameters.tableRows.size(); ++rowIndex)
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{
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size_t columns = 0;
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const std::vector<Layout>& row = layoutParameters.tableRows[rowIndex];
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if (columnWidths.size() < row.size())
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{
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columnWidths.resize(row.size(), 0.0);
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}
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for (size_t columnIndex = 0; columnIndex < row.size(); ++columnIndex)
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{
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const PDFReal cellHeight = row[columnIndex].nominalExtent.height();
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const PDFReal cellWidth = row[columnIndex].nominalExtent.width();
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if (rowHeights[rowIndex] < cellHeight)
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{
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rowHeights[rowIndex] = cellHeight;
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@ -10131,9 +10192,86 @@ void PDFXFALayoutEngine::layoutFlow(LayoutParameters& layoutParameters)
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{
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++columns;
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}
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columnWidths[columnIndex] = qMax(columnWidths[columnIndex], cellWidth);
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}
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maxColumns = qMax(maxColumns, columns);
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}
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QStringList colWidths = layoutParameters.colWidths.split(' ', Qt::SkipEmptyParts);
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for (size_t i = 0; i < columnWidths.size(); ++i)
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{
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if (i >= colWidths.size())
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{
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break;
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}
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xfa::XFA_Measurement measurement;
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if (xfa::XFA_Measurement::parseMeasurement(colWidths[int(i)], measurement))
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{
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const PDFReal colWidth = measurement.getValuePt(&layoutParameters.paragraphSettings);
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if (colWidth > 0)
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{
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columnWidths[i] = colWidth;
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}
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}
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}
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Layout finalLayout;
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finalLayout.pageIndex = pageIndex;
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finalLayout.colSpan = layoutParameters.columnSpan;
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PDFReal xOffset = 0;
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PDFReal yOffset = 0;
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for (size_t rowIndex = 0; rowIndex < layoutParameters.tableRows.size(); ++rowIndex)
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{
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std::vector<Layout>& tableRow = layoutParameters.tableRows[rowIndex];
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xOffset = 0;
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size_t columnTargetIndex = 0;
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for (size_t columnSourceIndex = 0; columnSourceIndex < tableRow.size(); ++columnSourceIndex)
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{
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Layout& sourceLayout = tableRow[columnSourceIndex];
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sourceLayout.translate(xOffset, yOffset);
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sourceLayout.updatePresence(layoutParameters.presence);
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PDFReal width = 0;
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for (size_t i = 0; i < sourceLayout.colSpan; ++i)
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{
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if (columnTargetIndex >= columnWidths.size())
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{
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// We do not have enough space in the table
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break;
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}
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width += columnWidths[columnTargetIndex++];
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}
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sourceLayout.resize(QSizeF(width, rowHeights[rowIndex]));
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finalLayout.items.insert(finalLayout.items.end(), sourceLayout.items.begin(), sourceLayout.items.end());
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xOffset += width;
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}
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yOffset += rowHeights[rowIndex];
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}
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// Translate by margin
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finalLayout.translate(layoutParameters.margins.left(), layoutParameters.margins.top());
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QSizeF nominalContentSize(xOffset, yOffset);
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QSizeF nominalExtentSizeWithoutCaption = nominalContentSize.grownBy(layoutParameters.margins);
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QSizeF nominalExtentSize = nominalExtentSizeWithoutCaption.grownBy(captionMargins);
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nominalExtentSize = layoutParameters.sizeInfo.adjustNominalExtentSize(nominalExtentSize);
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QRectF nominalExtentRegion(QPointF(0, 0), nominalExtentSize);
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finalLayout.nominalExtent = nominalExtentRegion;
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finalLayout.colSpan = layoutParameters.columnSpan;
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if (!finalLayout.items.empty())
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{
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layoutParameters.layout.emplace_back(std::move(finalLayout));
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}
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break;
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}
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@ -10180,13 +10318,13 @@ void PDFXFALayoutEngine::layoutFlow(LayoutParameters& layoutParameters)
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}
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}
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void PDFXFALayoutEngine::layoutPositional(LayoutParameters& sourceLayoutParameters,
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bool PDFXFALayoutEngine::layoutPositional(LayoutParameters& sourceLayoutParameters,
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LayoutParameters& targetLayoutParameters)
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{
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if (targetLayoutParameters.layoutType != xfa::XFA_BaseNode::LAYOUT::Position)
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{
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// Not a positional layout
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return;
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return false;
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}
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std::map<size_t, std::vector<Layout>> layoutsPerPage;
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@ -10276,6 +10414,8 @@ void PDFXFALayoutEngine::layoutPositional(LayoutParameters& sourceLayoutParamete
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targetLayoutParameters.layout.emplace_back(std::move(finalLayout));
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}
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}
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return true;
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}
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void PDFXFALayoutEngine::visit(const xfa::XFA_draw* node)
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