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Redact tool - basic functionality, create redaction annotations

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Jakub Melka
2020-12-26 17:59:06 +01:00
parent 8760a5ff17
commit 890b5e0e1c
19 changed files with 1815 additions and 342 deletions
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199
Pdf4QtLib/sources/pdfadvancedtools.cpp
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@ -1066,4 +1066,203 @@ void PDFCreateHighlightTextTool::setSelection(PDFTextSelection&& textSelection)
}
}
PDFCreateRedactRectangleTool::PDFCreateRedactRectangleTool(PDFDrawWidgetProxy* proxy, PDFToolManager* toolManager, QAction* action, QObject* parent) :
BaseClass(proxy, action, parent),
m_toolManager(toolManager),
m_pickTool(nullptr)
{
m_pickTool = new PDFPickTool(proxy, PDFPickTool::Mode::Rectangles, this);
m_pickTool->setSelectionRectangleColor(Qt::black);
addTool(m_pickTool);
connect(m_pickTool, &PDFPickTool::rectanglePicked, this, &PDFCreateRedactRectangleTool::onRectanglePicked);
updateActions();
}
void PDFCreateRedactRectangleTool::onRectanglePicked(PDFInteger pageIndex, QRectF pageRectangle)
{
if (pageRectangle.isEmpty())
{
return;
}
PDFDocumentModifier modifier(getDocument());
PDFObjectReference page = getDocument()->getCatalog()->getPage(pageIndex)->getPageReference();
PDFObjectReference annotation = modifier.getBuilder()->createAnnotationRedact(page, pageRectangle, Qt::black);
modifier.getBuilder()->updateAnnotationAppearanceStreams(annotation);
modifier.markAnnotationsChanged();
if (modifier.finalize())
{
emit m_toolManager->documentModified(PDFModifiedDocument(modifier.getDocument(), nullptr, modifier.getFlags()));
}
setActive(false);
}
PDFCreateRedactTextTool::PDFCreateRedactTextTool(PDFDrawWidgetProxy* proxy, PDFToolManager* toolManager, QAction* action, QObject* parent) :
BaseClass(proxy, action, parent),
m_toolManager(toolManager),
m_isCursorOverText(false)
{
updateActions();
}
void PDFCreateRedactTextTool::drawPage(QPainter* painter,
PDFInteger pageIndex,
const PDFPrecompiledPage* compiledPage,
PDFTextLayoutGetter& layoutGetter,
const QMatrix& pagePointToDevicePointMatrix,
QList<PDFRenderError>& errors) const
{
Q_UNUSED(compiledPage);
Q_UNUSED(errors);
pdf::PDFTextSelectionPainter textSelectionPainter(&m_textSelection);
textSelectionPainter.draw(painter, pageIndex, layoutGetter, pagePointToDevicePointMatrix);
}
void PDFCreateRedactTextTool::mousePressEvent(QWidget* widget, QMouseEvent* event)
{
Q_UNUSED(widget);
if (event->button() == Qt::LeftButton)
{
QPointF pagePoint;
const PDFInteger pageIndex = getProxy()->getPageUnderPoint(event->pos(), &pagePoint);
if (pageIndex != -1)
{
m_selectionInfo.pageIndex = pageIndex;
m_selectionInfo.selectionStartPoint = pagePoint;
event->accept();
}
else
{
m_selectionInfo = SelectionInfo();
}
setSelection(pdf::PDFTextSelection());
updateCursor();
}
}
void PDFCreateRedactTextTool::mouseReleaseEvent(QWidget* widget, QMouseEvent* event)
{
Q_UNUSED(widget);
if (event->button() == Qt::LeftButton)
{
if (m_selectionInfo.pageIndex != -1)
{
QPointF pagePoint;
const PDFInteger pageIndex = getProxy()->getPageUnderPoint(event->pos(), &pagePoint);
if (m_selectionInfo.pageIndex == pageIndex)
{
// Jakub Melka: handle the selection
PDFTextLayoutGetter textLayoutGetter = getProxy()->getTextLayoutCompiler()->getTextLayoutLazy(pageIndex);
PDFTextLayout textLayout = textLayoutGetter;
setSelection(textLayout.createTextSelection(pageIndex, m_selectionInfo.selectionStartPoint, pagePoint, Qt::black));
QPolygonF quadrilaterals;
PDFTextSelectionPainter textSelectionPainter(&m_textSelection);
QPainterPath path = textSelectionPainter.prepareGeometry(pageIndex, textLayoutGetter, QMatrix(), &quadrilaterals);
if (!path.isEmpty())
{
PDFDocumentModifier modifier(getDocument());
PDFObjectReference page = getDocument()->getCatalog()->getPage(pageIndex)->getPageReference();
modifier.getBuilder()->createAnnotationRedact(page, quadrilaterals, Qt::black);
modifier.markAnnotationsChanged();
if (modifier.finalize())
{
emit m_toolManager->documentModified(PDFModifiedDocument(modifier.getDocument(), nullptr, modifier.getFlags()));
}
}
}
setSelection(pdf::PDFTextSelection());
m_selectionInfo = SelectionInfo();
event->accept();
updateCursor();
}
}
}
void PDFCreateRedactTextTool::mouseMoveEvent(QWidget* widget, QMouseEvent* event)
{
Q_UNUSED(widget);
QPointF pagePoint;
const PDFInteger pageIndex = getProxy()->getPageUnderPoint(event->pos(), &pagePoint);
PDFTextLayout textLayout = getProxy()->getTextLayoutCompiler()->getTextLayoutLazy(pageIndex);
m_isCursorOverText = textLayout.isHoveringOverTextBlock(pagePoint);
if (m_selectionInfo.pageIndex != -1)
{
if (m_selectionInfo.pageIndex == pageIndex)
{
// Jakub Melka: handle the selection
setSelection(textLayout.createTextSelection(pageIndex, m_selectionInfo.selectionStartPoint, pagePoint, Qt::black));
}
else
{
setSelection(pdf::PDFTextSelection());
}
event->accept();
}
updateCursor();
}
void PDFCreateRedactTextTool::updateActions()
{
if (QAction* action = getAction())
{
const bool isEnabled = getDocument() && getDocument()->getStorage().getSecurityHandler()->isAllowed(PDFSecurityHandler::Permission::ModifyInteractiveItems);
action->setChecked(isActive());
action->setEnabled(isEnabled);
}
}
void PDFCreateRedactTextTool::setActiveImpl(bool active)
{
BaseClass::setActiveImpl(active);
if (!active)
{
// Just clear the text selection
setSelection(PDFTextSelection());
}
}
void PDFCreateRedactTextTool::updateCursor()
{
if (isActive())
{
if (m_isCursorOverText)
{
setCursor(QCursor(Qt::IBeamCursor));
}
else
{
setCursor(QCursor(Qt::ArrowCursor));
}
}
}
void PDFCreateRedactTextTool::setSelection(PDFTextSelection&& textSelection)
{
if (m_textSelection != textSelection)
{
m_textSelection = qMove(textSelection);
getProxy()->repaintNeeded();
}
}
} // namespace pdf