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XFA: rendering captions

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This commit is contained in:
Jakub Melka 2021-12-04 19:22:14 +01:00
parent ee459c77d7
commit ac7519df22
1 changed files with 134 additions and 22 deletions
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156
Pdf4QtLib/sources/pdfxfaengine.cpp
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@ -9671,6 +9671,7 @@ public:
const xfa::XFA_draw* draw = nullptr;
const xfa::XFA_field* field = nullptr;
size_t paragraphSettingsIndex = 0;
size_t captionParagraphSettingsIndex = 0;
};
using LayoutItems = std::vector<LayoutItem>;
@ -9736,11 +9737,27 @@ private:
QList<PDFRenderError>& errors,
QRectF nominalExtentArea,
size_t paragraphSettingsIndex,
size_t captionParagraphSettingsIndex,
QPainter* painter);
void drawItemField(const xfa::XFA_field* item,
QList<PDFRenderError>& errors,
QRectF nominalExtentArea,
size_t paragraphSettingsIndex,
size_t captionParagraphSettingsIndex,
QPainter* painter);
void drawItemCaption(const xfa::XFA_caption* item,
QList<PDFRenderError>& errors,
QRectF& nominalExtentArea,
size_t captionParagraphSettingsIndex,
QPainter* painter);
void drawItemValue(const xfa::XFA_value* value,
const xfa::XFA_ui* ui,
QList<PDFRenderError>& errors,
QRectF nominalContentArea,
size_t paragraphSettingsIndex,
QPainter* painter);
void drawUi(const xfa::XFA_ui* ui,
@ -9799,6 +9816,8 @@ private:
void handlePara(const xfa::XFA_para* para);
void handleFont(const xfa::XFA_font* font);
size_t handleCaption(const xfa::XFA_caption* caption);
void handleBreak(const xfa::XFA_break* node, bool isBeforeLayout);
void handleBreak(const xfa::XFA_breakBefore* node);
void handleBreak(const xfa::XFA_breakAfter* node);
@ -9875,6 +9894,9 @@ private:
/// Paragraph settings index
size_t paragraphSettingsIndex = 0;
/// Paragraph settings index for caption
size_t captionParagraphSettingsIndex = 0;
const xfa::XFA_draw* draw = nullptr;
const xfa::XFA_field* field = nullptr;
};
@ -10505,6 +10527,7 @@ void PDFXFALayoutEngine::visit(const xfa::XFA_draw* node)
Layout layout = initializeSingleLayout(nominalExtent);
layout.items.back().presence = node->getPresence();
layout.items.back().draw = node;
layout.items.back().captionParagraphSettingsIndex = handleCaption(node->getCaption());
parameters.layout.emplace_back(std::move(layout));
}
@ -10549,6 +10572,7 @@ void PDFXFALayoutEngine::visit(const xfa::XFA_field* node)
Layout layout = initializeSingleLayout(nominalExtent);
layout.items.back().presence = node->getPresence();
layout.items.back().field = node;
layout.items.back().captionParagraphSettingsIndex = handleCaption(node->getCaption());
parameters.layout.emplace_back(std::move(layout));
}
@ -10587,6 +10611,7 @@ void PDFXFALayoutEngine::performLayout(PDFXFAEngineImpl* engine, const xfa::XFA_
engineLayoutItem.draw = layoutItem.draw;
engineLayoutItem.field = layoutItem.field;
engineLayoutItem.paragraphSettingsIndex = layoutItem.paragraphSettingsIndex;
engineLayoutItem.captionParagraphSettingsIndex = layoutItem.captionParagraphSettingsIndex;
layoutItems.emplace_back(std::move(engineLayoutItem));
}
}
@ -10980,6 +11005,21 @@ void PDFXFALayoutEngine::handleFont(const xfa::XFA_font* font)
settings.setFont(createdFont);
}
size_t PDFXFALayoutEngine::handleCaption(const xfa::XFA_caption* caption)
{
if (!caption)
{
return 0;
}
LayoutParameters& layoutParameters = getLayoutParameters();
PDFTemporaryValueChange guard(&layoutParameters.paragraphSettings, layoutParameters.paragraphSettings);
handlePara(caption->getPara());
handleFont(caption->getFont());
return createParagraphSettings();
}
void PDFXFALayoutEngine::handleBreak(const xfa::XFA_break* node, bool isBeforeLayout)
{
if (!node)
@ -11319,31 +11359,19 @@ void PDFXFAEngineImpl::draw(const QMatrix& pagePointToDevicePointMatrix,
const LayoutItems& items = it->second;
for (const LayoutItem& item : items)
{
drawItemDraw(item.draw, errors, item.nominalExtent, item.paragraphSettingsIndex, painter);
drawItemField(item.field, errors, item.nominalExtent, painter);
drawItemDraw(item.draw, errors, item.nominalExtent, item.paragraphSettingsIndex, item.captionParagraphSettingsIndex, painter);
drawItemField(item.field, errors, item.nominalExtent, item.paragraphSettingsIndex, item.captionParagraphSettingsIndex, painter);
}
}
void PDFXFAEngineImpl::drawItemDraw(const xfa::XFA_draw* item,
QList<PDFRenderError>& errors,
QRectF nominalExtentArea,
size_t paragraphSettingsIndex,
QPainter* painter)
void PDFXFAEngineImpl::drawItemValue(const xfa::XFA_value* value,
const xfa::XFA_ui* ui,
QList<PDFRenderError>& errors,
QRectF nominalContentArea,
size_t paragraphSettingsIndex,
QPainter* painter)
{
if (!item)
{
// Not a draw
return;
}
QRectF nominalExtent = nominalExtentArea;
QRectF nominalContentArea = nominalExtent;
QMarginsF contentMargins = createMargin(item->getMargin());
nominalContentArea = nominalExtent.marginsRemoved(contentMargins);
drawItemBorder(item->getBorder(), errors, nominalExtent, painter);
if (const xfa::XFA_value* value = item->getValue())
if (value)
{
std::optional<NodeValue> nodeValue;
@ -11470,7 +11498,7 @@ void PDFXFAEngineImpl::drawItemDraw(const xfa::XFA_draw* item,
if (nodeValue)
{
drawUi(item->getUi(), nodeValue.value(), errors, nominalContentArea, paragraphSettingsIndex, painter);
drawUi(ui, nodeValue.value(), errors, nominalContentArea, paragraphSettingsIndex, painter);
}
// TODO: implement draw arc (getArc())
@ -11478,9 +11506,34 @@ void PDFXFAEngineImpl::drawItemDraw(const xfa::XFA_draw* item,
}
}
void PDFXFAEngineImpl::drawItemDraw(const xfa::XFA_draw* item,
QList<PDFRenderError>& errors,
QRectF nominalExtentArea,
size_t paragraphSettingsIndex,
size_t captionParagraphSettingsIndex,
QPainter* painter)
{
if (!item)
{
// Not a draw
return;
}
QRectF nominalExtent = nominalExtentArea;
QRectF nominalContentArea = nominalExtent;
QMarginsF contentMargins = createMargin(item->getMargin());
nominalContentArea = nominalExtent.marginsRemoved(contentMargins);
drawItemBorder(item->getBorder(), errors, nominalExtent, painter);
drawItemCaption(item->getCaption(), errors, nominalContentArea, captionParagraphSettingsIndex, painter);
drawItemValue(item->getValue(), item->getUi(), errors, nominalContentArea, paragraphSettingsIndex, painter);
}
void PDFXFAEngineImpl::drawItemField(const xfa::XFA_field* item,
QList<PDFRenderError>& errors,
QRectF nominalExtentArea,
size_t paragraphSettingsIndex,
size_t captionParagraphSettingsIndex,
QPainter* painter)
{
if (!item)
@ -11495,10 +11548,69 @@ void PDFXFAEngineImpl::drawItemField(const xfa::XFA_field* item,
nominalContentArea = nominalExtent.marginsRemoved(contentMargins);
drawItemBorder(item->getBorder(), errors, nominalExtent, painter);
drawItemCaption(item->getCaption(), errors, nominalContentArea, captionParagraphSettingsIndex, painter);
// TODO: implement this
}
void PDFXFAEngineImpl::drawItemCaption(const xfa::XFA_caption* item,
QList<PDFRenderError>& errors,
QRectF& nominalExtentArea,
size_t captionParagraphSettingsIndex,
QPainter* painter)
{
if (!item)
{
return;
}
QRectF captionArea = nominalExtentArea;
// Do we have visible caption?
QMarginsF captionsNominalExtentMargins(0.0, 0.0, 0.0, 0.0);
if (item->getPresence() == xfa::XFA_BaseNode::PRESENCE::Visible ||
item->getPresence() == xfa::XFA_BaseNode::PRESENCE::Invisible)
{
PDFReal reserveSize = item->getReserve().getValuePt(nullptr);
switch (item->getPlacement())
{
case xfa::XFA_BaseNode::PLACEMENT::Left:
captionsNominalExtentMargins.setLeft(reserveSize);
captionArea.setWidth(reserveSize);
break;
case xfa::XFA_BaseNode::PLACEMENT::Bottom:
captionsNominalExtentMargins.setBottom(reserveSize);
captionArea.setTop(captionArea.bottom() - reserveSize);
break;
case xfa::XFA_BaseNode::PLACEMENT::Inline:
// Do nothing
break;
case xfa::XFA_BaseNode::PLACEMENT::Right:
captionsNominalExtentMargins.setRight(reserveSize);
captionArea.setLeft(captionArea.right() - reserveSize);
break;
case xfa::XFA_BaseNode::PLACEMENT::Top:
captionsNominalExtentMargins.setTop(reserveSize);
captionArea.setHeight(reserveSize);
break;
}
}
if (captionsNominalExtentMargins.isNull())
{
return;
}
// Remove caption area from nominal extent area
nominalExtentArea = nominalExtentArea.marginsRemoved(captionsNominalExtentMargins);
// Caption can have its own margin
QMarginsF captionNominalContentMargins = createMargin(item->getMargin());
captionArea = captionArea.marginsRemoved(captionNominalContentMargins);
drawItemValue(item->getValue(), nullptr, errors, captionArea, captionParagraphSettingsIndex, painter);
}
void PDFXFAEngineImpl::drawUi(const xfa::XFA_ui* ui,
const NodeValue& value,
QList<PDFRenderError>& errors,