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Text highlight tools basics

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This commit is contained in:
Jakub Melka 2020-12-11 18:59:39 +01:00
parent 11ad8f2821
commit dc55950050
13 changed files with 856 additions and 18 deletions
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139
PdfForQtLib/sources/pdfadvancedtools.cpp
View File

@ -19,6 +19,7 @@
#include "pdfdocumentbuilder.h"
#include "pdfdrawwidget.h"
#include "pdfutils.h"
#include "pdfcompiler.h"
#include <QActionGroup>
#include <QInputDialog>
@ -856,4 +857,142 @@ void PDFCreateStampTool::onPointPicked(PDFInteger pageIndex, QPointF pagePoint)
setActive(false);
}
PDFCreateHighlightTextTool::PDFCreateHighlightTextTool(PDFDrawWidgetProxy* proxy, PDFToolManager* toolManager, AnnotationType type, QAction* action, QObject* parent) :
BaseClass(proxy, action, parent),
m_toolManager(toolManager),
m_type(type),
m_isCursorOverText(false)
{
updateActions();
}
void PDFCreateHighlightTextTool::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 PDFCreateHighlightTextTool::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 PDFCreateHighlightTextTool::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
PDFTextLayout textLayout = getProxy()->getTextLayoutCompiler()->getTextLayoutLazy(pageIndex);
setSelection(textLayout.createTextSelection(pageIndex, m_selectionInfo.selectionStartPoint, pagePoint));
}
else
{
setSelection(pdf::PDFTextSelection());
}
m_selectionInfo = SelectionInfo();
event->accept();
updateCursor();
}
}
}
void PDFCreateHighlightTextTool::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));
}
else
{
setSelection(pdf::PDFTextSelection());
}
event->accept();
}
updateCursor();
}
void PDFCreateHighlightTextTool::setActiveImpl(bool active)
{
BaseClass::setActiveImpl(active);
if (!active)
{
// Just clear the text selection
setSelection(PDFTextSelection());
}
}
void PDFCreateHighlightTextTool::updateCursor()
{
if (isActive())
{
if (m_isCursorOverText)
{
setCursor(QCursor(Qt::IBeamCursor));
}
else
{
setCursor(QCursor(Qt::ArrowCursor));
}
}
}
void PDFCreateHighlightTextTool::setSelection(PDFTextSelection&& textSelection)
{
if (m_textSelection != textSelection)
{
m_textSelection = qMove(textSelection);
getProxy()->repaintNeeded();
}
}
} // namespace pdf

48
PdfForQtLib/sources/pdfadvancedtools.h
View File

@ -261,6 +261,54 @@ private:
PDFStampAnnotation m_stampAnnotation;
};
/// Tool for highlighting of text in document
class PDFFORQTLIBSHARED_EXPORT PDFCreateHighlightTextTool : public PDFCreateAnnotationTool
{
Q_OBJECT
private:
using BaseClass = PDFCreateAnnotationTool;
public:
/// Creates new highlight text tool
/// \param proxy Proxy
/// \param type Annotation type, must be one of: Highlight, Underline, Squiggly, StrikeOut
/// \param action Action
/// \param parent Parent
explicit PDFCreateHighlightTextTool(PDFDrawWidgetProxy* proxy, PDFToolManager* toolManager, AnnotationType type, QAction* action, QObject* parent);
virtual void drawPage(QPainter* painter,
PDFInteger pageIndex,
const PDFPrecompiledPage* compiledPage,
PDFTextLayoutGetter& layoutGetter,
const QMatrix& pagePointToDevicePointMatrix,
QList<PDFRenderError>& errors) const override;
virtual void mousePressEvent(QWidget* widget, QMouseEvent* event) override;
virtual void mouseReleaseEvent(QWidget* widget, QMouseEvent* event) override;
virtual void mouseMoveEvent(QWidget* widget, QMouseEvent* event) override;
protected:
virtual void setActiveImpl(bool active) override;
private:
void updateCursor();
void setSelection(pdf::PDFTextSelection&& textSelection);
struct SelectionInfo
{
PDFInteger pageIndex = -1;
QPointF selectionStartPoint;
};
PDFToolManager* m_toolManager;
AnnotationType m_type;
pdf::PDFTextSelection m_textSelection;
SelectionInfo m_selectionInfo;
bool m_isCursorOverText;
};
} // namespace pdf
#endif // PDFADVANCEDTOOLS_H

62
PdfForQtLib/sources/pdfcompiler.cpp
View File

@ -236,7 +236,8 @@ void PDFTextLayoutGenerator::performOutputCharacter(const PDFTextCharacterInfo&
PDFAsynchronousTextLayoutCompiler::PDFAsynchronousTextLayoutCompiler(PDFDrawWidgetProxy* proxy) :
BaseClass(proxy),
m_proxy(proxy),
m_isRunning(false)
m_isRunning(false),
m_cache(std::bind(&PDFAsynchronousTextLayoutCompiler::createTextLayout, this, std::placeholders::_1))
{
connect(&m_textLayoutCompileFutureWatcher, &QFutureWatcher<PDFTextLayoutStorage>::finished, this, &PDFAsynchronousTextLayoutCompiler::onTextLayoutCreated);
}
@ -279,6 +280,7 @@ void PDFAsynchronousTextLayoutCompiler::stop(bool clearCache)
if (clearCache)
{
m_textLayouts = std::nullopt;
m_cache.clear();
}
m_state = State::Inactive;
@ -300,6 +302,50 @@ void PDFAsynchronousTextLayoutCompiler::reset()
start();
}
PDFTextLayout PDFAsynchronousTextLayoutCompiler::createTextLayout(PDFInteger pageIndex)
{
PDFTextLayout result;
if (isTextLayoutReady())
{
result = getTextLayout(pageIndex);
}
else
{
if (m_state != State::Active || !m_proxy->getDocument())
{
// Engine is not active, do not calculate layout
return result;
}
const PDFCatalog* catalog = m_proxy->getDocument()->getCatalog();
if (pageIndex < 0 || pageIndex >= PDFInteger(catalog->getPageCount()))
{
return result;
}
if (!catalog->getPage(pageIndex))
{
// Invalid page index
return result;
}
const PDFPage* page = catalog->getPage(pageIndex);
Q_ASSERT(page);
bool guard = false;
m_proxy->getFontCache()->setCacheShrinkEnabled(&guard, false);
PDFCMSPointer cms = m_proxy->getCMSManager()->getCurrentCMS();
PDFTextLayoutGenerator generator(m_proxy->getFeatures(), page, m_proxy->getDocument(), m_proxy->getFontCache(), cms.data(), m_proxy->getOptionalContentActivity(), QMatrix(), m_proxy->getMeshQualitySettings());
generator.processContents();
result = generator.createTextLayout();
m_proxy->getFontCache()->setCacheShrinkEnabled(&guard, true);
}
return result;
}
PDFTextLayout PDFAsynchronousTextLayoutCompiler::getTextLayout(PDFInteger pageIndex)
{
if (m_state != State::Active || !m_proxy->getDocument())
@ -318,18 +364,7 @@ PDFTextLayout PDFAsynchronousTextLayoutCompiler::getTextLayout(PDFInteger pageIn
PDFTextLayoutGetter PDFAsynchronousTextLayoutCompiler::getTextLayoutLazy(PDFInteger pageIndex)
{
if (m_state != State::Active || !m_proxy->getDocument())
{
// Engine is not active, always return empty layout
return PDFTextLayoutGetter(nullptr, pageIndex);
}
if (m_textLayouts)
{
return m_textLayouts->getTextLayoutLazy(pageIndex);
}
return PDFTextLayoutGetter(nullptr, pageIndex);
return PDFTextLayoutGetter(&m_cache, pageIndex);
}
PDFTextSelection PDFAsynchronousTextLayoutCompiler::getTextSelectionAll(QColor color) const
@ -454,6 +489,7 @@ void PDFAsynchronousTextLayoutCompiler::onTextLayoutCreated()
{
m_proxy->getFontCache()->setCacheShrinkEnabled(this, true);
m_proxy->getProgress()->finish();
m_cache.clear();
m_textLayouts = m_textLayoutCompileFuture.result();
m_isRunning = false;

7
PdfForQtLib/sources/pdfcompiler.h
View File

@ -129,6 +129,12 @@ public:
Stopping
};
/// Creates text layout of the page synchronously. If page index is invalid,
/// then empty text layout is returned. Compiler must be active to get
/// valid text layout.
/// \param pageIndex Page index
PDFTextLayout createTextLayout(PDFInteger pageIndex);
/// Returns text layout of the page. If page index is invalid,
/// then empty text layout is returned.
/// \param pageIndex Page index
@ -166,6 +172,7 @@ private:
std::optional<PDFTextLayoutStorage> m_textLayouts;
QFuture<PDFTextLayoutStorage> m_textLayoutCompileFuture;
QFutureWatcher<PDFTextLayoutStorage> m_textLayoutCompileFutureWatcher;
PDFTextLayoutCache m_cache;
};
class PDFTextLayoutGenerator : public PDFPageContentProcessor

27
PdfForQtLib/sources/pdftextlayout.cpp
View File

@ -1306,7 +1306,7 @@ bool PDFFindResult::operator<(const PDFFindResult& other) const
return textSelectionItems.front() < other.textSelectionItems.front();
}
PDFTextLayout PDFTextLayoutGetter::getTextLayoutImpl() const
PDFTextLayout PDFTextLayoutStorageGetter::getTextLayoutImpl() const
{
return m_storage ? m_storage->getTextLayout(m_pageIndex) : PDFTextLayout();
}
@ -1423,4 +1423,29 @@ void PDFTextSelectionPainter::draw(QPainter* painter, PDFInteger pageIndex, PDFT
painter->restore();
}
PDFTextLayoutCache::PDFTextLayoutCache(std::function<PDFTextLayout (PDFInteger)> textLayoutGetter) :
m_textLayoutGetter(qMove(textLayoutGetter)),
m_pageIndex(-1),
m_layout()
{
}
void PDFTextLayoutCache::clear()
{
m_pageIndex = -1;
m_layout = PDFTextLayout();
}
const PDFTextLayout& PDFTextLayoutCache::getTextLayout(PDFInteger pageIndex)
{
if (m_pageIndex != pageIndex)
{
m_pageIndex = pageIndex;
m_layout = m_textLayoutGetter(pageIndex);
}
return m_layout;
}
} // namespace pdf

50
PdfForQtLib/sources/pdftextlayout.h
View File

@ -395,13 +395,55 @@ private:
PDFTextBlocks m_blocks;
};
/// Cache for storing single text layout
class PDFFORQTLIBSHARED_EXPORT PDFTextLayoutCache
{
public:
explicit PDFTextLayoutCache(std::function<PDFTextLayout(PDFInteger)> textLayoutGetter);
/// Clears the cache
void clear();
/// Returns text layout. This function always succeeds. If compiler is not active,
/// then empty layout is returned.
/// \param compiler Text layout compiler
/// \param pageIndex Page index
const PDFTextLayout& getTextLayout(PDFInteger pageIndex);
private:
std::function<PDFTextLayout(PDFInteger)> m_textLayoutGetter;
PDFInteger m_pageIndex;
PDFTextLayout m_layout;
};
class PDFFORQTLIBSHARED_EXPORT PDFTextLayoutGetter
{
public:
explicit inline PDFTextLayoutGetter(PDFTextLayoutCache* cache, PDFInteger pageIndex) :
m_cache(cache),
m_pageIndex(pageIndex)
{
}
/// Cast operator, casts to constant reference to PDFTextLayout
operator const PDFTextLayout&()
{
return m_cache->getTextLayout(m_pageIndex);
}
private:
PDFTextLayoutCache* m_cache;
PDFInteger m_pageIndex;
};
/// Lazy getter for text layouts from storage. This is used, when we do not want to
/// get text layout each time, because it is time expensive. If text layout is not needed,
/// then nothing happens. Text layout is returned only, if conversion operator is used.
class PDFTextLayoutGetter
class PDFTextLayoutStorageGetter
{
public:
explicit PDFTextLayoutGetter(const PDFTextLayoutStorage* storage, PDFInteger pageIndex) :
explicit PDFTextLayoutStorageGetter(const PDFTextLayoutStorage* storage, PDFInteger pageIndex) :
m_storage(storage),
m_pageIndex(pageIndex)
{
@ -411,7 +453,7 @@ public:
/// Cast operator, casts to constant reference to PDFTextLayout
operator const PDFTextLayout&()
{
return m_textLayout.get(this, &PDFTextLayoutGetter::getTextLayoutImpl);
return m_textLayout.get(this, &PDFTextLayoutStorageGetter::getTextLayoutImpl);
}
private:
@ -471,7 +513,7 @@ public:
/// then empty text layout is returned. Function is not thread safe, if
/// function \p setTextLayout is called from another thread.
/// \param pageIndex Page index
PDFTextLayoutGetter getTextLayoutLazy(PDFInteger pageIndex) const { return PDFTextLayoutGetter(this, pageIndex); }
PDFTextLayoutStorageGetter getTextLayoutLazy(PDFInteger pageIndex) const { return PDFTextLayoutStorageGetter(this, pageIndex); }
/// Sets text layout to the particular index. Index must be valid and from
/// range 0 to \p pageCount - 1. Function is not thread safe.

4
PdfForQtViewer/pdfforqtviewer.qrc
View File

@ -53,5 +53,9 @@
<file>resources/signature.svg</file>
<file>resources/plugins.svg</file>
<file>resources/hyperlink.svg</file>
<file>resources/highlight.svg</file>
<file>resources/squiggly.svg</file>
<file>resources/strikeout.svg</file>
<file>resources/underline.svg</file>
</qresource>
</RCC>

13
PdfForQtViewer/pdfviewermainwindow.cpp
View File

@ -369,6 +369,14 @@ PDFViewerMainWindow::PDFViewerMainWindow(QWidget* parent) :
m_toolManager->addTool(createFreehandCurveTool);
pdf::PDFCreateStampTool* createStampTool = new pdf::PDFCreateStampTool(m_pdfWidget->getDrawWidgetProxy(), m_toolManager, m_insertStampGroup, this);
m_toolManager->addTool(createStampTool);
pdf::PDFCreateHighlightTextTool* createHighlightTextTool = new pdf::PDFCreateHighlightTextTool(m_pdfWidget->getDrawWidgetProxy(), m_toolManager, pdf::AnnotationType::Highlight, ui->actionCreateTextHighlight, this);
m_toolManager->addTool(createHighlightTextTool);
pdf::PDFCreateHighlightTextTool* createUnderlineTextTool = new pdf::PDFCreateHighlightTextTool(m_pdfWidget->getDrawWidgetProxy(), m_toolManager, pdf::AnnotationType::Underline, ui->actionCreateTextUnderline, this);
m_toolManager->addTool(createUnderlineTextTool);
pdf::PDFCreateHighlightTextTool* createStrikeOutTextTool = new pdf::PDFCreateHighlightTextTool(m_pdfWidget->getDrawWidgetProxy(), m_toolManager, pdf::AnnotationType::StrikeOut, ui->actionCreateTextStrikeout, this);
m_toolManager->addTool(createStrikeOutTextTool);
pdf::PDFCreateHighlightTextTool* createSquigglyTextTool = new pdf::PDFCreateHighlightTextTool(m_pdfWidget->getDrawWidgetProxy(), m_toolManager, pdf::AnnotationType::Squiggly, ui->actionCreateTextSquiggly, this);
m_toolManager->addTool(createSquigglyTextTool);
m_annotationManager = new pdf::PDFWidgetAnnotationManager(m_pdfWidget->getDrawWidgetProxy(), this);
connect(m_annotationManager, &pdf::PDFWidgetAnnotationManager::actionTriggered, this, &PDFViewerMainWindow::onActionTriggered);
@ -479,6 +487,11 @@ void PDFViewerMainWindow::loadPlugins()
{
for (QAction* action : toolbarButton->menu()->actions())
{
if (action->isSeparator())
{
continue;
}
if (action->isEnabled())
{
toolbarButton->setDefaultAction(action);

58
PdfForQtViewer/pdfviewermainwindow.ui
View File

@ -151,6 +151,15 @@
<string>Stamp</string>
</property>
</widget>
<widget class="QMenu" name="menuTextHighlight">
<property name="title">
<string>Text Higlight</string>
</property>
<addaction name="actionCreateTextHighlight"/>
<addaction name="actionCreateTextUnderline"/>
<addaction name="actionCreateTextStrikeout"/>
<addaction name="actionCreateTextSquiggly"/>
</widget>
<addaction name="menuSticky_Note"/>
<addaction name="actionCreateHyperlink"/>
<addaction name="actionInlineText"/>
@ -160,6 +169,7 @@
<addaction name="actionCreateEllipse"/>
<addaction name="actionCreateFreehandCurve"/>
<addaction name="menuStamp"/>
<addaction name="menuTextHighlight"/>
</widget>
<addaction name="menuFile"/>
<addaction name="menuEdit"/>
@ -697,6 +707,54 @@
<string>Freehand Curve</string>
</property>
</action>
<action name="actionCreateTextHighlight">
<property name="checkable">
<bool>true</bool>
</property>
<property name="icon">
<iconset resource="pdfforqtviewer.qrc">
<normaloff>:/resources/highlight.svg</normaloff>:/resources/highlight.svg</iconset>
</property>
<property name="text">
<string>Highlight</string>
</property>
</action>
<action name="actionCreateTextUnderline">
<property name="checkable">
<bool>true</bool>
</property>
<property name="icon">
<iconset resource="pdfforqtviewer.qrc">
<normaloff>:/resources/underline.svg</normaloff>:/resources/underline.svg</iconset>
</property>
<property name="text">
<string>Underline</string>
</property>
</action>
<action name="actionCreateTextStrikeout">
<property name="checkable">
<bool>true</bool>
</property>
<property name="icon">
<iconset resource="pdfforqtviewer.qrc">
<normaloff>:/resources/strikeout.svg</normaloff>:/resources/strikeout.svg</iconset>
</property>
<property name="text">
<string>Strikeout</string>
</property>
</action>
<action name="actionCreateTextSquiggly">
<property name="checkable">
<bool>true</bool>
</property>
<property name="icon">
<iconset resource="pdfforqtviewer.qrc">
<normaloff>:/resources/squiggly.svg</normaloff>:/resources/squiggly.svg</iconset>
</property>
<property name="text">
<string>Squiggly</string>
</property>
</action>
</widget>
<layoutdefault spacing="6" margin="11"/>
<resources>

109
PdfForQtViewer/resources/highlight.svg Normal file
View File

@ -0,0 +1,109 @@
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