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Signature plugin: Sign electronically

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This commit is contained in:
Jakub Melka 2022-04-18 13:54:58 +02:00
parent a08d49e8d6
commit b2a26ada19
7 changed files with 147 additions and 16 deletions
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95
Pdf4QtLib/sources/pdfdocumentbuilder.cpp
View File

@ -703,9 +703,13 @@ std::array<PDFReal, 4> PDFDocumentBuilder::getAnnotationReductionRectangle(const
return { qAbs(innerRect.left() - boundingRect.left()), qAbs(boundingRect.bottom() - innerRect.bottom()), qAbs(boundingRect.right() - innerRect.right()), qAbs(boundingRect.top() - innerRect.top()) };
}
PDFPageContentStreamBuilder::PDFPageContentStreamBuilder(PDFDocumentBuilder* builder) :
PDFPageContentStreamBuilder::PDFPageContentStreamBuilder(PDFDocumentBuilder* builder,
PDFContentStreamBuilder::CoordinateSystem coordinateSystem,
Mode mode) :
m_documentBuilder(builder),
m_contentStreamBuilder(nullptr)
m_contentStreamBuilder(nullptr),
m_coordinateSystem(coordinateSystem),
m_mode(mode)
{
}
@ -733,7 +737,7 @@ QPainter* PDFPageContentStreamBuilder::begin(PDFObjectReference page)
}
m_pageReference = page;
m_contentStreamBuilder = new PDFContentStreamBuilder(mediaBox.size(), PDFContentStreamBuilder::CoordinateSystem::Qt);
m_contentStreamBuilder = new PDFContentStreamBuilder(mediaBox.size(), m_coordinateSystem);
return m_contentStreamBuilder->begin();
}
@ -762,21 +766,86 @@ void PDFPageContentStreamBuilder::end(QPainter* painter)
PDFObjectReference resourcesReference = copiedObjects[0].getReference();
PDFObjectReference contentsReference = copiedObjects[1].getReference();
PDFObjectFactory pageUpdateFactory;
if (m_mode == Mode::Replace)
{
PDFObjectFactory pageUpdateFactory;
pageUpdateFactory.beginDictionary();
pageUpdateFactory.beginDictionary();
pageUpdateFactory.beginDictionaryItem("Contents");
pageUpdateFactory << contentsReference;
pageUpdateFactory.endDictionaryItem();
pageUpdateFactory.beginDictionaryItem("Contents");
pageUpdateFactory << contentsReference;
pageUpdateFactory.endDictionaryItem();
pageUpdateFactory.beginDictionaryItem("Resources");
pageUpdateFactory << resourcesReference;
pageUpdateFactory.endDictionaryItem();
pageUpdateFactory.beginDictionaryItem("Resources");
pageUpdateFactory << resourcesReference;
pageUpdateFactory.endDictionaryItem();
pageUpdateFactory.endDictionary();
pageUpdateFactory.endDictionary();
m_documentBuilder->mergeTo(m_pageReference, pageUpdateFactory.takeObject());
m_documentBuilder->mergeTo(m_pageReference, pageUpdateFactory.takeObject());
}
else
{
std::vector<PDFObjectReference> contentReferences;
PDFObject pageObject = m_documentBuilder->getObjectByReference(m_pageReference);
if (pageObject.isDictionary())
{
const PDFDictionary* pageDictionary = pageObject.getDictionary();
const PDFObject& oldContents = pageDictionary->get("Contents");
const PDFObject& oldContentsObject = m_documentBuilder->getObject(oldContents);
if (oldContentsObject.isStream())
{
if (oldContents.isReference())
{
contentReferences.push_back(oldContents.getReference());
}
}
else if (oldContentsObject.isArray())
{
const PDFArray* contentsArray = oldContentsObject.getArray();
for (const PDFObject& object : *contentsArray)
{
if (object.isReference())
{
contentReferences.push_back(object.getReference());
}
}
}
}
switch (m_mode)
{
case Mode::PlaceBefore:
contentReferences.insert(contentReferences.begin(), contentsReference);
break;
case Mode::PlaceAfter:
contentReferences.push_back(contentsReference);
break;
default:
Q_ASSERT(false);
break;
}
PDFObjectFactory pageUpdateFactory;
pageUpdateFactory.beginDictionary();
pageUpdateFactory.beginDictionaryItem("Contents");
pageUpdateFactory << contentReferences;
pageUpdateFactory.endDictionaryItem();
pageUpdateFactory.beginDictionaryItem("Resources");
pageUpdateFactory << resourcesReference;
pageUpdateFactory.endDictionaryItem();
pageUpdateFactory.endDictionary();
m_documentBuilder->mergeTo(m_pageReference, pageUpdateFactory.takeObject());
}
}
void PDFDocumentBuilder::updateAnnotationAppearanceStreams(PDFObjectReference annotationReference)

17
Pdf4QtLib/sources/pdfdocumentbuilder.h
View File

@ -261,9 +261,20 @@ private:
class PDF4QTLIBSHARED_EXPORT PDFPageContentStreamBuilder
{
public:
PDFPageContentStreamBuilder(PDFDocumentBuilder* builder);
/// Starts painting onto the page. Old page content is erased. This
enum class Mode
{
Replace,
PlaceBefore,
PlaceAfter
};
/// Vytvoří nový builder, který vytváří obsah stránek.
PDFPageContentStreamBuilder(PDFDocumentBuilder* builder,
PDFContentStreamBuilder::CoordinateSystem coordinateSystem = PDFContentStreamBuilder::CoordinateSystem::Qt,
Mode mode = Mode::Replace);
/// Starts painting onto the page. Old page content is erased (in Replace mode). This
/// function returns painter, onto which can be graphics drawn. Painter
/// uses Qt's coordinate system. Calling begin multiple times, without
/// subsequent calls to end function, is invalid and can result
@ -287,6 +298,8 @@ private:
PDFDocumentBuilder* m_documentBuilder;
PDFContentStreamBuilder* m_contentStreamBuilder;
PDFObjectReference m_pageReference;
PDFContentStreamBuilder::CoordinateSystem m_coordinateSystem;
Mode m_mode;
};
class PDF4QTLIBSHARED_EXPORT PDFDocumentBuilder

12
Pdf4QtLib/sources/pdfpagecontentelements.cpp
View File

@ -868,6 +868,18 @@ std::set<PDFInteger> PDFPageContentScene::getSelectedElementIds() const
return result;
}
std::set<PDFInteger> PDFPageContentScene::getPageIndices() const
{
std::set<PDFInteger> result;
for (const auto& element : m_elements)
{
result.insert(element->getPageIndex());
}
return result;
}
void PDFPageContentScene::setSelectedElementIds(const std::set<PDFInteger>& selectedElementIds)
{
m_manipulator.selectNew(selectedElementIds);

3
Pdf4QtLib/sources/pdfpagecontentelements.h
View File

@ -504,6 +504,9 @@ public:
/// Returns set of selected element ids
std::set<PDFInteger> getSelectedElementIds() const;
/// Returns set of involved pages
std::set<PDFInteger> getPageIndices() const;
/// Set selected items
void setSelectedElementIds(const std::set<PDFInteger>& selectedElementIds);

2
Pdf4QtLib/sources/pdfwidgettool.cpp
View File

@ -101,7 +101,7 @@ void PDFWidgetTool::setActive(bool active)
setActiveImpl(active);
updateActions();
m_proxy->repaintNeeded();
emit m_proxy->repaintNeeded();
emit toolActivityChanged(active);
}
}

33
Pdf4QtViewerPlugins/SignaturePlugin/signatureplugin.cpp
View File

@ -20,10 +20,12 @@
#include "pdfutils.h"
#include "pdfpagecontenteditorwidget.h"
#include "pdfpagecontenteditorstylesettings.h"
#include "pdfdocumentbuilder.h"
#include <QAction>
#include <QToolButton>
#include <QMainWindow>
#include <QMessageBox>
namespace pdfplugin
{
@ -152,6 +154,7 @@ void SignaturePlugin::setWidget(pdf::PDFWidget* widget)
connect(&m_scene, &pdf::PDFPageContentScene::editElementRequest, this, &SignaturePlugin::onSceneEditElement);
connect(clearAction, &QAction::triggered, &m_scene, &pdf::PDFPageContentScene::clear);
connect(activateAction, &QAction::triggered, this, &SignaturePlugin::setActive);
connect(signElectronicallyAction, &QAction::triggered, this, &SignaturePlugin::onSignElectronically);
updateActions();
}
@ -268,6 +271,36 @@ void SignaturePlugin::onSceneEditElement(const std::set<pdf::PDFInteger>& elemen
}
}
void SignaturePlugin::onSignElectronically()
{
Q_ASSERT(m_document);
Q_ASSERT(!m_scene.isEmpty());
if (QMessageBox::question(m_dataExchangeInterface->getMainWindow(), tr("Confirm Signature"), tr("Document will be signed electronically. Do you want to continue?"), QMessageBox::Yes, QMessageBox::No) == QMessageBox::Yes)
{
pdf::PDFDocumentModifier modifier(m_document);
std::set<pdf::PDFInteger> pageIndices = m_scene.getPageIndices();
for (pdf::PDFInteger pageIndex : pageIndices)
{
const pdf::PDFPage* page = m_document->getCatalog()->getPage(pageIndex);
pdf::PDFPageContentStreamBuilder pageContentStreamBuilder(modifier.getBuilder(),
pdf::PDFContentStreamBuilder::CoordinateSystem::PDF,
pdf::PDFPageContentStreamBuilder::Mode::PlaceAfter);
QPainter* painter = pageContentStreamBuilder.begin(page->getPageReference());
QList<pdf::PDFRenderError> errors;
pdf::PDFTextLayoutGetter nullGetter(nullptr, pageIndex);
m_scene.drawPage(painter, pageIndex, nullptr, nullGetter, QMatrix(), errors);
pageContentStreamBuilder.end(painter);
}
if (modifier.finalize())
{
emit m_widget->getToolManager()->documentModified(pdf::PDFModifiedDocument(modifier.getDocument(), nullptr, modifier.getFlags()));
}
}
}
void SignaturePlugin::onPenChanged(const QPen& pen)
{
if (pdf::PDFCreatePCElementTool* activeTool = qobject_cast<pdf::PDFCreatePCElementTool*>(getActiveTool()))

1
Pdf4QtViewerPlugins/SignaturePlugin/signatureplugin.h
View File

@ -53,6 +53,7 @@ private:
void onWidgetSelectionChanged();
void onToolActivityChanged();
void onSceneEditElement(const std::set<pdf::PDFInteger>& elements);
void onSignElectronically();
void onPenChanged(const QPen& pen);
void onBrushChanged(const QBrush& brush);