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PDF4QT/Pdf4QtLib/sources/pdfpagecontentelements.cpp

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// Copyright (C) 2022 Jakub Melka
//
// This file is part of PDF4QT.
//
// PDF4QT is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// with the written consent of the copyright owner, any later version.
//
// PDF4QT is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with PDF4QT. If not, see <https://www.gnu.org/licenses/>.
#include "pdfpagecontentelements.h"
#include "pdfpainterutils.h"
#include "pdfdrawwidget.h"
#include "pdfdrawspacecontroller.h"
#include "pdfwidgetutils.h"
#include "pdfutils.h"
#include <QPainter>
#include <QKeyEvent>
#include <QMouseEvent>
#include <QSvgRenderer>
#include <QApplication>
#include <QImageReader>
namespace pdf
{
PDFInteger PDFPageContentElement::getPageIndex() const
{
return m_pageIndex;
}
void PDFPageContentElement::setPageIndex(PDFInteger newPageIndex)
{
m_pageIndex = newPageIndex;
}
PDFInteger PDFPageContentElement::getElementId() const
{
return m_elementId;
}
void PDFPageContentElement::setElementId(PDFInteger newElementId)
{
m_elementId = newElementId;
}
Qt::CursorShape PDFPageContentElement::getCursorShapeForManipulationMode(uint mode)
{
switch (mode)
{
case None:
case Pt1:
case Pt2:
case Translate:
return Qt::ArrowCursor;
case Top:
case Bottom:
return Qt::SizeVerCursor;
case Left:
case Right:
return Qt::SizeHorCursor;
case TopLeft:
case BottomRight:
return Qt::SizeBDiagCursor;
case TopRight:
case BottomLeft:
return Qt::SizeFDiagCursor;
default:
Q_ASSERT(false);
break;
}
return Qt::ArrowCursor;
}
uint PDFPageContentElement::getRectangleManipulationMode(const QRectF& rectangle,
const QPointF& point,
PDFReal snapPointDistanceThreshold) const
{
if ((rectangle.topLeft() - point).manhattanLength() < snapPointDistanceThreshold)
{
return TopLeft;
}
if ((rectangle.topRight() - point).manhattanLength() < snapPointDistanceThreshold)
{
return TopRight;
}
if ((rectangle.bottomLeft() - point).manhattanLength() < snapPointDistanceThreshold)
{
return BottomLeft;
}
if ((rectangle.bottomRight() - point).manhattanLength() < snapPointDistanceThreshold)
{
return BottomRight;
}
if (rectangle.left() <= point.x() &&
point.x() <= rectangle.right() &&
(qAbs(rectangle.top() - point.y()) < snapPointDistanceThreshold))
{
return Top;
}
if (rectangle.left() <= point.x() &&
point.x() <= rectangle.right() &&
(qAbs(rectangle.bottom() - point.y()) < snapPointDistanceThreshold))
{
return Bottom;
}
if (rectangle.top() <= point.y() &&
point.y() <= rectangle.bottom() &&
(qAbs(rectangle.left() - point.x()) < snapPointDistanceThreshold))
{
return Left;
}
if (rectangle.top() <= point.y() &&
point.y() <= rectangle.bottom() &&
(qAbs(rectangle.right() - point.x()) < snapPointDistanceThreshold))
{
return Right;
}
if (rectangle.contains(point))
{
return Translate;
}
return None;
}
void PDFPageContentElement::performRectangleManipulation(QRectF& rectangle,
uint mode,
const QPointF& offset)
{
switch (mode)
{
case None:
break;
case Translate:
rectangle.translate(offset);
break;
case Top:
rectangle.setTop(qMin(rectangle.bottom(), rectangle.top() + offset.y()));
break;
case Left:
rectangle.setLeft(qMin(rectangle.right(), rectangle.left() + offset.x()));
break;
case Right:
rectangle.setRight(qMax(rectangle.left(), rectangle.right() + offset.x()));
break;
case Bottom:
rectangle.setBottom(qMax(rectangle.top(), rectangle.bottom() + offset.y()));
break;
case TopLeft:
rectangle.setTop(qMin(rectangle.bottom(), rectangle.top() + offset.y()));
rectangle.setLeft(qMin(rectangle.right(), rectangle.left() + offset.x()));
break;
case TopRight:
rectangle.setTop(qMin(rectangle.bottom(), rectangle.top() + offset.y()));
rectangle.setRight(qMax(rectangle.left(), rectangle.right() + offset.x()));
break;
case BottomLeft:
rectangle.setBottom(qMax(rectangle.top(), rectangle.bottom() + offset.y()));
rectangle.setLeft(qMin(rectangle.right(), rectangle.left() + offset.x()));
break;
case BottomRight:
rectangle.setBottom(qMax(rectangle.top(), rectangle.bottom() + offset.y()));
rectangle.setRight(qMax(rectangle.left(), rectangle.right() + offset.x()));
break;
default:
Q_ASSERT(false);
break;
}
}
void PDFPageContentElement::performRectangleSetSize(QRectF& rectangle, QSizeF size)
{
const qreal offset = rectangle.size().height() - size.height();
rectangle.setSize(size);
rectangle.translate(0, offset);
}
QString PDFPageContentElement::formatDescription(const QString& description) const
{
return PDFTranslationContext::tr("#%1: %2").arg(getElementId()).arg(description);
}
const QPen& PDFPageContentStyledElement::getPen() const
{
return m_pen;
}
void PDFPageContentStyledElement::setPen(const QPen& newPen)
{
m_pen = newPen;
}
const QBrush& PDFPageContentStyledElement::getBrush() const
{
return m_brush;
}
void PDFPageContentStyledElement::setBrush(const QBrush& newBrush)
{
m_brush = newBrush;
}
PDFPageContentElementRectangle* PDFPageContentElementRectangle::clone() const
{
PDFPageContentElementRectangle* copy = new PDFPageContentElementRectangle();
copy->setElementId(getElementId());
copy->setPageIndex(getPageIndex());
copy->setPen(getPen());
copy->setBrush(getBrush());
copy->setRectangle(getRectangle());
copy->setRounded(isRounded());
return copy;
}
bool PDFPageContentElementRectangle::isRounded() const
{
return m_rounded;
}
void PDFPageContentElementRectangle::setRounded(bool newRounded)
{
m_rounded = newRounded;
}
const QRectF& PDFPageContentElementRectangle::getRectangle() const
{
return m_rectangle;
}
void PDFPageContentElementRectangle::setRectangle(const QRectF& newRectangle)
{
m_rectangle = newRectangle;
}
void PDFPageContentElementRectangle::drawPage(QPainter* painter,
PDFInteger pageIndex,
const PDFPrecompiledPage* compiledPage,
PDFTextLayoutGetter& layoutGetter,
const QTransform& pagePointToDevicePointMatrix,
QList<PDFRenderError>& errors) const
{
Q_UNUSED(compiledPage);
Q_UNUSED(layoutGetter);
Q_UNUSED(errors);
if (pageIndex != getPageIndex())
{
return;
}
PDFPainterStateGuard guard(painter);
painter->setWorldTransform(QTransform(pagePointToDevicePointMatrix), true);
painter->setPen(getPen());
painter->setBrush(getBrush());
painter->setRenderHint(QPainter::Antialiasing);
QRectF rect = getRectangle();
if (isRounded())
{
qreal radius = qMin(rect.width(), rect.height()) * 0.25;
painter->drawRoundedRect(rect, radius, radius, Qt::AbsoluteSize);
}
else
{
painter->drawRect(rect);
}
}
uint PDFPageContentElementRectangle::getManipulationMode(const QPointF& point,
PDFReal snapPointDistanceThreshold) const
{
return getRectangleManipulationMode(getRectangle(), point, snapPointDistanceThreshold);
}
void PDFPageContentElementRectangle::performManipulation(uint mode, const QPointF& offset)
{
performRectangleManipulation(m_rectangle, mode, offset);
}
QRectF PDFPageContentElementRectangle::getBoundingBox() const
{
return getRectangle();
}
void PDFPageContentElementRectangle::setSize(QSizeF size)
{
performRectangleSetSize(m_rectangle, size);
}
QString PDFPageContentElementRectangle::getDescription() const
{
return formatDescription(isRounded() ? PDFTranslationContext::tr("Rounded rectangle") : PDFTranslationContext::tr("Rectangle"));
}
PDFPageContentScene::PDFPageContentScene(QObject* parent) :
QObject(parent),
m_firstFreeId(1),
m_isActive(false),
m_widget(nullptr),
m_manipulator(this, nullptr)
{
connect(&m_manipulator, &PDFPageContentElementManipulator::selectionChanged, this, &PDFPageContentScene::onSelectionChanged);
}
PDFPageContentScene::~PDFPageContentScene()
{
}
void PDFPageContentScene::addElement(PDFPageContentElement* element)
{
element->setElementId(m_firstFreeId++);
m_elements.emplace_back(element);
emit sceneChanged(false);
}
void PDFPageContentScene::replaceElement(PDFPageContentElement* element)
{
std::unique_ptr<PDFPageContentElement> elementPtr(element);
for (size_t i = 0; i < m_elements.size(); ++i)
{
if (m_elements[i]->getElementId() == element->getElementId())
{
m_elements[i] = std::move(elementPtr);
emit sceneChanged(false);
break;
}
}
}
PDFPageContentElement* PDFPageContentScene::getElementById(PDFInteger id) const
{
auto it = std::find_if(m_elements.cbegin(), m_elements.cend(), [id](const auto& element) { return element->getElementId() == id; });
if (it != m_elements.cend())
{
return it->get();
}
return nullptr;
}
void PDFPageContentScene::clear()
{
if (!m_elements.empty())
{
m_manipulator.reset();
m_elements.clear();
emit sceneChanged(false);
}
}
void PDFPageContentScene::shortcutOverrideEvent(QWidget* widget, QKeyEvent* event)
{
Q_UNUSED(widget);
constexpr QKeySequence::StandardKey acceptedKeys[] = { QKeySequence::Delete,
QKeySequence::SelectAll,
QKeySequence::Deselect,
QKeySequence::Cancel };
if (std::any_of(std::begin(acceptedKeys), std::end(acceptedKeys), [event](QKeySequence::StandardKey standardKey) { return event == standardKey; }))
{
event->accept();
return;
}
}
void PDFPageContentScene::keyPressEvent(QWidget* widget, QKeyEvent* event)
{
Q_UNUSED(widget);
event->ignore();
if (event == QKeySequence::Delete)
{
if (!m_manipulator.isSelectionEmpty())
{
m_manipulator.performDeleteSelection();
event->accept();
}
}
else if (event == QKeySequence::SelectAll)
{
if (!isEmpty())
{
m_manipulator.selectAll();
event->accept();
}
}
else if (event == QKeySequence::Deselect)
{
if (!m_manipulator.isSelectionEmpty())
{
m_manipulator.deselectAll();
event->accept();
}
}
else if (event == QKeySequence::Cancel)
{
if (m_manipulator.isManipulationInProgress())
{
m_manipulator.cancelManipulation();
m_manipulator.deselectAll();
event->accept();
}
}
}
void PDFPageContentScene::keyReleaseEvent(QWidget* widget, QKeyEvent* event)
{
Q_UNUSED(widget);
event->ignore();
}
void PDFPageContentScene::mousePressEvent(QWidget* widget, QMouseEvent* event)
{
if (!isActive())
{
return;
}
MouseEventInfo info = getMouseEventInfo(widget, event->pos());
if (info.isValid() || isMouseGrabbed())
{
// We to handle selecting/deselecting the active
// item. After that, accept the item.
if (info.isValid() && event->button() == Qt::LeftButton)
{
info.widgetMouseStartPos = event->pos();
info.timer.start();
if (!m_manipulator.isManipulationInProgress())
{
Qt::KeyboardModifiers keyboardModifiers = QApplication::keyboardModifiers();
const bool isCtrl = keyboardModifiers.testFlag(Qt::ControlModifier);
const bool isShift = keyboardModifiers.testFlag(Qt::ShiftModifier);
if (isCtrl && !isShift)
{
m_manipulator.select(info.hoveredElementIds);
}
else if (!isCtrl && isShift)
{
m_manipulator.deselect(info.hoveredElementIds);
}
else if (!m_manipulator.isAllSelected(info.hoveredElementIds))
{
m_manipulator.selectNew(info.hoveredElementIds);
}
}
event->accept();
}
grabMouse(info, event);
}
else if (event->button() == Qt::LeftButton)
{
m_manipulator.deselectAll();
}
updateMouseCursor(info, getSnapPointDistanceThreshold());
}
void PDFPageContentScene::mouseDoubleClickEvent(QWidget* widget, QMouseEvent* event)
{
Q_UNUSED(widget);
if (!isActive())
{
return;
}
MouseEventInfo info = getMouseEventInfo(widget, event->pos());
if (info.isValid())
{
emit editElementRequest(info.hoveredElementIds);
}
// If mouse is grabbed, then event is accepted always (because
// we get Press event, when we grabbed the mouse, then we will
// wait for corresponding release event while all mouse move events
// will be accepted, even if editor doesn't accept them.
if (isMouseGrabbed())
{
event->accept();
}
}
void PDFPageContentScene::mouseReleaseEvent(QWidget* widget, QMouseEvent* event)
{
Q_UNUSED(widget);
if (!isActive())
{
return;
}
if (isMouseGrabbed())
{
if (event->button() == Qt::LeftButton)
{
event->accept();
if (m_manipulator.isManipulationInProgress())
{
QPointF pagePoint;
const PDFInteger pageIndex = m_widget->getDrawWidgetProxy()->getPageUnderPoint(event->pos(), &pagePoint);
m_mouseGrabInfo.info.widgetMouseCurrentPos = event->pos();
bool isCopyCreated = QApplication::keyboardModifiers().testFlag(Qt::ControlModifier);
m_manipulator.finishManipulation(pageIndex, m_mouseGrabInfo.info.pagePos, pagePoint, isCopyCreated);
}
}
ungrabMouse(getMouseEventInfo(widget, event->pos()), event);
}
MouseEventInfo info = getMouseEventInfo(widget, event->pos());
updateMouseCursor(info, getSnapPointDistanceThreshold());
}
void PDFPageContentScene::mouseMoveEvent(QWidget* widget, QMouseEvent* event)
{
Q_UNUSED(widget);
if (!isActive())
{
return;
}
const PDFReal threshold = getSnapPointDistanceThreshold();
QPointF pagePoint;
const PDFInteger pageIndex = m_widget->getDrawWidgetProxy()->getPageUnderPoint(event->pos(), &pagePoint);
if (m_mouseGrabInfo.info.isValid() &&
event->buttons().testFlag(Qt::LeftButton) &&
m_mouseGrabInfo.info.pageIndex == pageIndex &&
m_manipulator.isManipulationAllowed(pageIndex))
{
// Jakub Melka: Start grab?
m_mouseGrabInfo.info.widgetMouseCurrentPos = event->pos();
if (!m_manipulator.isManipulationInProgress())
{
QPoint vector = m_mouseGrabInfo.info.widgetMouseCurrentPos - m_mouseGrabInfo.info.widgetMouseStartPos;
if (vector.manhattanLength() > QApplication::startDragDistance() ||
m_mouseGrabInfo.info.timer.hasExpired(QApplication::startDragTime()))
{
m_manipulator.startManipulation(pageIndex, m_mouseGrabInfo.info.pagePos, pagePoint, threshold);
}
}
else
{
m_manipulator.updateManipulation(pageIndex, m_mouseGrabInfo.info.pagePos, pagePoint);
}
}
MouseEventInfo info = getMouseEventInfo(widget, event->pos());
updateMouseCursor(info, threshold);
// If mouse is grabbed, then event is accepted always (because
// we get Press event, when we grabbed the mouse, then we will
// wait for corresponding release event while all mouse move events
// will be accepted, even if editor doesn't accept them.
if (isMouseGrabbed())
{
event->accept();
}
if (m_manipulator.isManipulationInProgress())
{
emit sceneChanged(true);
}
}
void PDFPageContentScene::wheelEvent(QWidget* widget, QWheelEvent* event)
{
Q_UNUSED(widget);
if (!isActive())
{
return;
}
// We will accept mouse wheel events, if we are grabbing the mouse.
// We do not want to zoom in/zoom out while grabbing.
if (isMouseGrabbed())
{
event->accept();
}
}
QString PDFPageContentScene::getTooltip() const
{
return QString();
}
const std::optional<QCursor>& PDFPageContentScene::getCursor() const
{
return m_cursor;
}
int PDFPageContentScene::getInputPriority() const
{
return ToolPriority + 1;
}
void PDFPageContentScene::drawElements(QPainter* painter,
PDFInteger pageIndex,
PDFTextLayoutGetter& layoutGetter,
const QTransform& pagePointToDevicePointMatrix,
const PDFPrecompiledPage* compiledPage,
QList<PDFRenderError>& errors) const
{
for (const auto& element : m_elements)
{
if (element->getPageIndex() != pageIndex)
{
continue;
}
element->drawPage(painter, pageIndex, compiledPage, layoutGetter, pagePointToDevicePointMatrix, errors);
}
}
void PDFPageContentScene::drawPage(QPainter* painter,
PDFInteger pageIndex,
const PDFPrecompiledPage* compiledPage,
PDFTextLayoutGetter& layoutGetter,
const QTransform& pagePointToDevicePointMatrix,
QList<PDFRenderError>& errors) const
{
if (!m_isActive)
{
return;
}
drawElements(painter, pageIndex, layoutGetter, pagePointToDevicePointMatrix, compiledPage, errors);
m_manipulator.drawPage(painter, pageIndex, compiledPage, layoutGetter, pagePointToDevicePointMatrix, errors);
}
PDFPageContentScene::MouseEventInfo PDFPageContentScene::getMouseEventInfo(QWidget* widget, QPoint point)
{
MouseEventInfo result;
Q_UNUSED(widget);
Q_ASSERT(isActive());
if (isMouseGrabbed())
{
result = m_mouseGrabInfo.info;
result.widgetMouseCurrentPos = point;
return result;
}
result.widgetMouseStartPos = point;
result.widgetMouseCurrentPos = point;
result.timer = m_mouseGrabInfo.info.timer;
result.pageIndex = m_widget->getDrawWidgetProxy()->getPageUnderPoint(point, &result.pagePos);
const PDFReal threshold = getSnapPointDistanceThreshold();
for (const auto& elementItem : m_elements)
{
PDFPageContentElement* element = elementItem.get();
if (element->getPageIndex() != result.pageIndex)
{
// Different page
continue;
}
if (element->getManipulationMode(result.pagePos, threshold) != 0)
{
result.hoveredElementIds.insert(element->getElementId());
}
}
return result;
}
PDFReal PDFPageContentScene::getSnapPointDistanceThreshold() const
{
const PDFReal snapPointDistanceThresholdPixels = PDFWidgetUtils::scaleDPI_x(m_widget, 6.0);
const PDFReal snapPointDistanceThreshold = m_widget->getDrawWidgetProxy()->transformPixelToDeviceSpace(snapPointDistanceThresholdPixels);
return snapPointDistanceThreshold;
}
void PDFPageContentScene::grabMouse(const MouseEventInfo& info, QMouseEvent* event)
{
Q_ASSERT(isActive());
if (event->type() == QEvent::MouseButtonDblClick)
{
// Double clicks doesn't grab the mouse
return;
}
Q_ASSERT(event->type() == QEvent::MouseButtonPress);
if (isMouseGrabbed())
{
// If mouse is already grabbed, then when new mouse button is pressed,
// we just increase nesting level and accept the mouse event. We are
// accepting all mouse events, if mouse is grabbed.
++m_mouseGrabInfo.mouseGrabNesting;
event->accept();
}
else if (event->isAccepted())
{
// Event is accepted and we are not grabbing the mouse. We must start
// grabbing the mouse.
Q_ASSERT(m_mouseGrabInfo.mouseGrabNesting == 0);
++m_mouseGrabInfo.mouseGrabNesting;
m_mouseGrabInfo.info = info;
}
}
void PDFPageContentScene::ungrabMouse(const MouseEventInfo& info, QMouseEvent* event)
{
Q_UNUSED(info);
Q_ASSERT(isActive());
Q_ASSERT(event->type() == QEvent::MouseButtonRelease);
if (isMouseGrabbed())
{
// Mouse is being grabbed, decrease nesting level. We must also accept
// mouse release event, because mouse is being grabbed.
--m_mouseGrabInfo.mouseGrabNesting;
event->accept();
if (!isMouseGrabbed())
{
m_mouseGrabInfo.info = MouseEventInfo();
}
}
Q_ASSERT(m_mouseGrabInfo.mouseGrabNesting >= 0);
}
void PDFPageContentScene::updateMouseCursor(const MouseEventInfo& info, PDFReal snapPointDistanceThreshold)
{
std::optional<Qt::CursorShape> cursorShapeValue;
for (const PDFInteger id : info.hoveredElementIds)
{
PDFPageContentElement* element = getElementById(id);
uint manipulationMode = element->getManipulationMode(info.pagePos, snapPointDistanceThreshold);
if (manipulationMode > 0)
{
Qt::CursorShape cursorShape = PDFPageContentElement::getCursorShapeForManipulationMode(manipulationMode);
if (!cursorShapeValue)
{
cursorShapeValue = cursorShape;
}
else if (cursorShapeValue.value() != cursorShape)
{
cursorShapeValue = Qt::ArrowCursor;
break;
}
}
}
if (cursorShapeValue && cursorShapeValue.value() == Qt::ArrowCursor &&
m_manipulator.isManipulationInProgress())
{
const bool isCopy = QApplication::keyboardModifiers().testFlag(Qt::ControlModifier);
cursorShapeValue = isCopy ? Qt::DragCopyCursor : Qt::DragMoveCursor;
}
// Update cursor shape
if (!cursorShapeValue)
{
m_cursor = std::nullopt;
}
else if (!m_cursor.has_value() || m_cursor.value().shape() != cursorShapeValue.value())
{
m_cursor = QCursor(cursorShapeValue.value());
}
}
void PDFPageContentScene::onSelectionChanged()
{
emit sceneChanged(true);
emit selectionChanged();
}
PDFWidget* PDFPageContentScene::widget() const
{
return m_widget;
}
void PDFPageContentScene::setWidget(PDFWidget* newWidget)
{
m_widget = newWidget;
}
bool PDFPageContentScene::isActive() const
{
return m_isActive;
}
void PDFPageContentScene::setActive(bool newIsActive)
{
if (m_isActive != newIsActive)
{
m_isActive = newIsActive;
if (!newIsActive)
{
m_mouseGrabInfo = MouseGrabInfo();
m_manipulator.reset();
}
emit sceneChanged(false);
}
}
std::set<PDFInteger> PDFPageContentScene::getElementIds() const
{
std::set<PDFInteger> result;
for (const auto& element : m_elements)
{
result.insert(element->getElementId());
}
return result;
}
std::set<PDFInteger> PDFPageContentScene::getSelectedElementIds() const
{
std::set<PDFInteger> result;
for (const auto& element : m_elements)
{
if (m_manipulator.isSelected(element->getElementId()))
{
result.insert(element->getElementId());
}
}
return result;
}
std::set<PDFInteger> PDFPageContentScene::getPageIndices() const
{
std::set<PDFInteger> result;
for (const auto& element : m_elements)
{
result.insert(element->getPageIndex());
}
return result;
}
QRectF PDFPageContentScene::getBoundingBox(PDFInteger pageIndex) const
{
QRectF rect;
for (const auto& element : m_elements)
{
if (element->getPageIndex() == pageIndex)
{
rect = rect.united(element->getBoundingBox());
}
}
return rect;
}
void PDFPageContentScene::setSelectedElementIds(const std::set<PDFInteger>& selectedElementIds)
{
m_manipulator.selectNew(selectedElementIds);
}
void PDFPageContentScene::removeElementsById(const std::vector<PDFInteger>& selection)
{
const size_t oldSize = m_elements.size();
m_elements.erase(std::remove_if(m_elements.begin(), m_elements.end(), [&selection](const auto& element){ return std::find(selection.cbegin(), selection.cend(), element->getElementId()) != selection.cend(); }), m_elements.end());
const size_t newSize = m_elements.size();
if (newSize < oldSize)
{
emit sceneChanged(false);
}
}
void PDFPageContentScene::performOperation(int operation)
{
m_manipulator.performOperation(static_cast<PDFPageContentElementManipulator::Operation>(operation));
}
const PDFDocument* PDFPageContentScene::getDocument() const
{
if (m_widget)
{
return m_widget->getDrawWidgetProxy()->getDocument();
}
return nullptr;
}
PDFPageContentElementLine* PDFPageContentElementLine::clone() const
{
PDFPageContentElementLine* copy = new PDFPageContentElementLine();
copy->setElementId(getElementId());
copy->setPageIndex(getPageIndex());
copy->setPen(getPen());
copy->setBrush(getBrush());
copy->setGeometry(getGeometry());
copy->setLine(getLine());
return copy;
}
void PDFPageContentElementLine::drawPage(QPainter* painter,
PDFInteger pageIndex,
const PDFPrecompiledPage* compiledPage,
PDFTextLayoutGetter& layoutGetter,
const QTransform& pagePointToDevicePointMatrix,
QList<PDFRenderError>& errors) const
{
Q_UNUSED(compiledPage);
Q_UNUSED(layoutGetter);
Q_UNUSED(errors);
if (pageIndex != getPageIndex())
{
return;
}
PDFPainterStateGuard guard(painter);
painter->setWorldTransform(QTransform(pagePointToDevicePointMatrix), true);
painter->setPen(getPen());
painter->setBrush(getBrush());
painter->setRenderHint(QPainter::Antialiasing);
painter->drawLine(getLine());
}
uint PDFPageContentElementLine::getManipulationMode(const QPointF& point,
PDFReal snapPointDistanceThreshold) const
{
if ((m_line.p1() - point).manhattanLength() < snapPointDistanceThreshold)
{
return Pt1;
}
if ((m_line.p2() - point).manhattanLength() < snapPointDistanceThreshold)
{
return Pt2;
}
QPointF vl = m_line.p2() - m_line.p1();
QPointF vp = point - m_line.p1();
const qreal lengthSquared = QPointF::dotProduct(vl, vl);
if (qFuzzyIsNull(lengthSquared))
{
return None;
}
const qreal t = QPointF::dotProduct(vl, vp) / lengthSquared;
if (t >= 0.0 && t <= 1.0)
{
QPointF projectedPoint = m_line.p1() + t * vl;
if ((point - projectedPoint).manhattanLength() < snapPointDistanceThreshold)
{
return Translate;
}
}
return None;
}
void PDFPageContentElementLine::performManipulation(uint mode, const QPointF& offset)
{
switch (mode)
{
case None:
break;
case Pt1:
m_line.setP1(m_line.p1() + offset);
break;
case Pt2:
m_line.setP2(m_line.p2() + offset);
break;
case Translate:
m_line.translate(offset);
break;
default:
Q_ASSERT(false);
break;
}
}
QRectF PDFPageContentElementLine::getBoundingBox() const
{
if (!qFuzzyIsNull(m_line.length()))
{
const qreal xMin = qMin(m_line.p1().x(), m_line.p2().x());
const qreal xMax = qMax(m_line.p1().x(), m_line.p2().x());
const qreal yMin = qMin(m_line.p1().y(), m_line.p2().y());
const qreal yMax = qMax(m_line.p1().y(), m_line.p2().y());
return QRectF(xMin, yMin, xMax - xMin, yMax - yMin);
}
return QRectF();
}
void PDFPageContentElementLine::setSize(QSizeF size)
{
QPointF p1 = m_line.p1();
QPointF p2 = m_line.p2();
if (p1.x() < p2.x())
{
p2.setX(p1.x() + size.width());
}
else
{
p1.setX(p2.x() + size.width());
}
if (p1.y() < p2.y())
{
p1.setY(p2.y() - size.height());
}
else
{
p2.setY(p1.y() - size.height());
}
m_line.setPoints(p1, p2);
}
QString PDFPageContentElementLine::getDescription() const
{
return formatDescription(PDFTranslationContext::tr("Line"));
}
PDFPageContentElementLine::LineGeometry PDFPageContentElementLine::getGeometry() const
{
return m_geometry;
}
void PDFPageContentElementLine::setGeometry(LineGeometry newGeometry)
{
m_geometry = newGeometry;
}
const QLineF& PDFPageContentElementLine::getLine() const
{
return m_line;
}
void PDFPageContentElementLine::setLine(const QLineF& newLine)
{
m_line = newLine;
if (m_geometry == LineGeometry::Horizontal)
{
m_line.setP2(QPointF(newLine.p2().x(), newLine.p1().y()));
}
if (m_geometry == LineGeometry::Vertical)
{
m_line.setP2(QPointF(newLine.p1().x(), newLine.p2().y()));
}
}
PDFPageContentImageElement::PDFPageContentImageElement() :
m_renderer(std::make_unique<QSvgRenderer>())
{
}
PDFPageContentImageElement::~PDFPageContentImageElement()
{
}
PDFPageContentImageElement* PDFPageContentImageElement::clone() const
{
PDFPageContentImageElement* copy = new PDFPageContentImageElement();
copy->setElementId(getElementId());
copy->setPageIndex(getPageIndex());
copy->setRectangle(getRectangle());
copy->setContent(getContent());
return copy;
}
void PDFPageContentImageElement::drawPage(QPainter* painter,
PDFInteger pageIndex,
const PDFPrecompiledPage* compiledPage,
PDFTextLayoutGetter& layoutGetter,
const QTransform& pagePointToDevicePointMatrix,
QList<PDFRenderError>& errors) const
{
Q_UNUSED(compiledPage);
Q_UNUSED(layoutGetter);
Q_UNUSED(errors);
if (pageIndex != getPageIndex() || !getRectangle().isValid())
{
return;
}
PDFPainterStateGuard guard(painter);
painter->setWorldTransform(QTransform(pagePointToDevicePointMatrix), true);
painter->setRenderHint(QPainter::Antialiasing);
if (m_renderer->isValid())
{
QRectF viewBox = m_renderer->viewBoxF();
if (!viewBox.isValid())
{
return;
}
QRectF renderBox = getRectangle();
QSizeF viewBoxSize = viewBox.size();
QSizeF renderBoxSize = viewBoxSize.scaled(renderBox.size(), Qt::KeepAspectRatio);
QRectF targetRenderBox = QRectF(QPointF(), renderBoxSize);
targetRenderBox.moveCenter(renderBox.center());
painter->translate(targetRenderBox.bottomLeft());
painter->scale(1.0, -1.0);
targetRenderBox.moveTopLeft(QPointF(0, 0));
m_renderer->render(painter, targetRenderBox);
}
else if (!m_image.isNull())
{
QRectF viewBox(QPointF(0, 0), m_image.size());
QRectF renderBox = getRectangle();
QSizeF viewBoxSize = viewBox.size();
QSizeF renderBoxSize = viewBoxSize.scaled(renderBox.size(), Qt::KeepAspectRatio);
QRectF targetRenderBox = QRectF(QPointF(), renderBoxSize);
targetRenderBox.moveCenter(renderBox.center());
painter->translate(targetRenderBox.bottomLeft());
painter->scale(1.0, -1.0);
targetRenderBox.moveTopLeft(QPointF(0, 0));
painter->drawImage(targetRenderBox, m_image);
}
}
uint PDFPageContentImageElement::getManipulationMode(const QPointF& point, PDFReal snapPointDistanceThreshold) const
{
return getRectangleManipulationMode(getRectangle(), point, snapPointDistanceThreshold);
}
void PDFPageContentImageElement::performManipulation(uint mode, const QPointF& offset)
{
performRectangleManipulation(m_rectangle, mode, offset);
}
QRectF PDFPageContentImageElement::getBoundingBox() const
{
return getRectangle();
}
void PDFPageContentImageElement::setSize(QSizeF size)
{
performRectangleSetSize(m_rectangle, size);
}
QString PDFPageContentImageElement::getDescription() const
{
return formatDescription(PDFTranslationContext::tr("SVG image"));
}
const QByteArray& PDFPageContentImageElement::getContent() const
{
return m_content;
}
void PDFPageContentImageElement::setContent(const QByteArray& newContent)
{
if (m_content != newContent)
{
m_content = newContent;
if (!m_renderer->load(m_content))
{
QByteArray imageData = m_content;
QBuffer buffer(&imageData);
buffer.open(QBuffer::ReadOnly);
QImageReader reader(&buffer);
m_image = reader.read();
buffer.close();;
}
}
}
const QRectF& PDFPageContentImageElement::getRectangle() const
{
return m_rectangle;
}
void PDFPageContentImageElement::setRectangle(const QRectF& newRectangle)
{
m_rectangle = newRectangle;
}
PDFPageContentElementDot* PDFPageContentElementDot::clone() const
{
PDFPageContentElementDot* copy = new PDFPageContentElementDot();
copy->setElementId(getElementId());
copy->setPageIndex(getPageIndex());
copy->setPen(getPen());
copy->setBrush(getBrush());
copy->setPoint(getPoint());
return copy;
}
void PDFPageContentElementDot::drawPage(QPainter* painter,
PDFInteger pageIndex,
const PDFPrecompiledPage* compiledPage,
PDFTextLayoutGetter& layoutGetter,
const QTransform& pagePointToDevicePointMatrix,
QList<PDFRenderError>& errors) const
{
Q_UNUSED(compiledPage);
Q_UNUSED(layoutGetter);
Q_UNUSED(errors);
if (pageIndex != getPageIndex())
{
return;
}
PDFPainterStateGuard guard(painter);
painter->setWorldTransform(QTransform(pagePointToDevicePointMatrix), true);
painter->setRenderHint(QPainter::Antialiasing);
painter->setPen(getPen());
painter->setBrush(getBrush());
painter->drawPoint(m_point);
}
uint PDFPageContentElementDot::getManipulationMode(const QPointF& point,
PDFReal snapPointDistanceThreshold) const
{
if ((m_point - point).manhattanLength() < snapPointDistanceThreshold)
{
return Translate;
}
return None;
}
void PDFPageContentElementDot::performManipulation(uint mode, const QPointF& offset)
{
switch (mode)
{
case None:
break;
case Translate:
m_point += offset;
break;
default:
Q_ASSERT(false);
break;
}
}
QRectF PDFPageContentElementDot::getBoundingBox() const
{
return QRectF(m_point, QSizeF(0.001, 0.001));
}
void PDFPageContentElementDot::setSize(QSizeF size)
{
Q_UNUSED(size);
}
QString PDFPageContentElementDot::getDescription() const
{
return formatDescription(PDFTranslationContext::tr("Dot"));
}
QPointF PDFPageContentElementDot::getPoint() const
{
return m_point;
}
void PDFPageContentElementDot::setPoint(QPointF newPoint)
{
m_point = newPoint;
}
PDFPageContentElementFreehandCurve* PDFPageContentElementFreehandCurve::clone() const
{
PDFPageContentElementFreehandCurve* copy = new PDFPageContentElementFreehandCurve();
copy->setElementId(getElementId());
copy->setPageIndex(getPageIndex());
copy->setPen(getPen());
copy->setBrush(getBrush());
copy->setCurve(getCurve());
return copy;
}
void PDFPageContentElementFreehandCurve::drawPage(QPainter* painter,
PDFInteger pageIndex,
const PDFPrecompiledPage* compiledPage,
PDFTextLayoutGetter& layoutGetter,
const QTransform& pagePointToDevicePointMatrix,
QList<PDFRenderError>& errors) const
{
Q_UNUSED(compiledPage);
Q_UNUSED(layoutGetter);
Q_UNUSED(errors);
if (pageIndex != getPageIndex())
{
return;
}
PDFPainterStateGuard guard(painter);
painter->setWorldTransform(QTransform(pagePointToDevicePointMatrix), true);
painter->setPen(getPen());
painter->setBrush(getBrush());
painter->setRenderHint(QPainter::Antialiasing);
painter->drawPath(getCurve());
}
uint PDFPageContentElementFreehandCurve::getManipulationMode(const QPointF& point, PDFReal snapPointDistanceThreshold) const
{
Q_UNUSED(snapPointDistanceThreshold);
if (m_curve.isEmpty())
{
return None;
}
if (m_curve.controlPointRect().contains(point))
{
return Translate;
}
return None;
}
void PDFPageContentElementFreehandCurve::performManipulation(uint mode, const QPointF& offset)
{
switch (mode)
{
case None:
break;
case Translate:
m_curve.translate(offset);
break;
default:
Q_ASSERT(false);
break;
}
}
QRectF PDFPageContentElementFreehandCurve::getBoundingBox() const
{
return m_curve.controlPointRect();
}
void PDFPageContentElementFreehandCurve::setSize(QSizeF size)
{
Q_UNUSED(size);
}
QString PDFPageContentElementFreehandCurve::getDescription() const
{
return formatDescription(PDFTranslationContext::tr("Freehand curve"));
}
QPainterPath PDFPageContentElementFreehandCurve::getCurve() const
{
return m_curve;
}
void PDFPageContentElementFreehandCurve::setCurve(QPainterPath newCurve)
{
m_curve = newCurve;
}
void PDFPageContentElementFreehandCurve::addStartPoint(const QPointF& point)
{
m_curve.moveTo(point);
}
void PDFPageContentElementFreehandCurve::addPoint(const QPointF& point)
{
m_curve.lineTo(point);
}
void PDFPageContentElementFreehandCurve::clear()
{
setPageIndex(-1);
m_curve = QPainterPath();
}
PDFPageContentElementManipulator::PDFPageContentElementManipulator(PDFPageContentScene* scene, QObject* parent) :
QObject(parent),
m_scene(scene),
m_isManipulationInProgress(false)
{
}
bool PDFPageContentElementManipulator::isSelected(PDFInteger id) const
{
return std::find(m_selection.cbegin(), m_selection.cend(), id) != m_selection.cend();
}
bool PDFPageContentElementManipulator::isAllSelected(const std::set<PDFInteger>& elementIds) const
{
return std::all_of(elementIds.cbegin(), elementIds.cend(), [this](PDFInteger id) { return isSelected(id); });
}
void PDFPageContentElementManipulator::reset()
{
cancelManipulation();
deselectAll();
}
void PDFPageContentElementManipulator::update(PDFInteger id, SelectionModes modes)
{
bool modified = false;
if (modes.testFlag(Clear))
{
modified = !m_selection.empty();
m_selection.clear();
}
// Is id valid?
if (id > 0)
{
if (modes.testFlag(Select))
{
if (!isSelected(id))
{
modified = true;
m_selection.push_back(id);
}
}
if (modes.testFlag(Deselect))
{
if (isSelected(id))
{
modified = true;
eraseSelectedElementById(id);
}
}
if (modes.testFlag(Toggle))
{
if (isSelected(id))
{
eraseSelectedElementById(id);
}
else
{
m_selection.push_back(id);
}
// When toggle is performed, selection is always changed
modified = true;
}
}
if (modified)
{
emit selectionChanged();
}
}
void PDFPageContentElementManipulator::update(const std::set<PDFInteger>& ids, SelectionModes modes)
{
bool modified = false;
if (modes.testFlag(Clear))
{
modified = !m_selection.empty();
m_selection.clear();
}
// Is id valid?
if (!ids.empty())
{
if (modes.testFlag(Select))
{
for (auto id : ids)
{
if (!isSelected(id))
{
modified = true;
m_selection.push_back(id);
}
}
}
if (modes.testFlag(Deselect))
{
for (auto id : ids)
{
if (isSelected(id))
{
modified = true;
eraseSelectedElementById(id);
}
}
}
if (modes.testFlag(Toggle))
{
for (auto id : ids)
{
if (isSelected(id))
{
eraseSelectedElementById(id);
}
else
{
m_selection.push_back(id);
}
// When toggle is performed, selection is always changed
modified = true;
}
}
}
if (modified)
{
emit selectionChanged();
}
}
void PDFPageContentElementManipulator::select(PDFInteger id)
{
update(id, Select);
}
void PDFPageContentElementManipulator::select(const std::set<PDFInteger>& ids)
{
update(ids, Select);
}
void PDFPageContentElementManipulator::selectNew(PDFInteger id)
{
update(id, SelectionModes(Select | Clear));
}
void PDFPageContentElementManipulator::selectNew(const std::set<PDFInteger>& ids)
{
update(ids, SelectionModes(Select | Clear));
}
void PDFPageContentElementManipulator::deselect(PDFInteger id)
{
update(id, Deselect);
}
void PDFPageContentElementManipulator::deselect(const std::set<PDFInteger>& ids)
{
update(ids, Deselect);
}
void PDFPageContentElementManipulator::selectAll()
{
std::set<PDFInteger> ids = m_scene->getElementIds();
update(ids, Select);
}
void PDFPageContentElementManipulator::deselectAll()
{
update(-1, Clear);
}
bool PDFPageContentElementManipulator::isManipulationAllowed(PDFInteger pageIndex) const
{
for (const PDFInteger id : m_selection)
{
if (const PDFPageContentElement* element = m_scene->getElementById(id))
{
if (element->getPageIndex() == pageIndex)
{
return true;
}
}
}
return false;
}
void PDFPageContentElementManipulator::performOperation(Operation operation)
{
if (isSelectionEmpty())
{
// Jakub Melka: nothing selected
return;
}
QRectF representativeRect = getSelectionBoundingRect();
std::vector<PDFPageContentElement*> manipulatedElements;
for (const PDFInteger id : m_selection)
{
const PDFPageContentElement* element = m_scene->getElementById(id);
manipulatedElements.push_back(element->clone());
}
switch (operation)
{
case Operation::AlignTop:
{
for (PDFPageContentElement* element : manipulatedElements)
{
QRectF boundingBox = element->getBoundingBox();
const qreal offset = representativeRect.bottom() - boundingBox.bottom();
element->performManipulation(PDFPageContentElement::Translate, QPointF(0.0, offset));
}
break;
}
case Operation::AlignCenterVertically:
{
for (PDFPageContentElement* element : manipulatedElements)
{
QRectF boundingBox = element->getBoundingBox();
const qreal offset = representativeRect.center().y() - boundingBox.center().y();
element->performManipulation(PDFPageContentElement::Translate, QPointF(0.0, offset));
}
break;
}
case Operation::AlignBottom:
{
for (PDFPageContentElement* element : manipulatedElements)
{
QRectF boundingBox = element->getBoundingBox();
const qreal offset = representativeRect.top() - boundingBox.top();
element->performManipulation(PDFPageContentElement::Translate, QPointF(0.0, offset));
}
break;
}
case Operation::AlignLeft:
{
for (PDFPageContentElement* element : manipulatedElements)
{
QRectF boundingBox = element->getBoundingBox();
const qreal offset = representativeRect.left() - boundingBox.left();
element->performManipulation(PDFPageContentElement::Translate, QPointF(offset, 0.0));
}
break;
}
case Operation::AlignCenterHorizontally:
{
for (PDFPageContentElement* element : manipulatedElements)
{
QRectF boundingBox = element->getBoundingBox();
const qreal offset = representativeRect.center().x() - boundingBox.center().x();
element->performManipulation(PDFPageContentElement::Translate, QPointF(offset, 0.0));
}
break;
}
case Operation::AlignRight:
{
for (PDFPageContentElement* element : manipulatedElements)
{
QRectF boundingBox = element->getBoundingBox();
const qreal offset = representativeRect.right() - boundingBox.right();
element->performManipulation(PDFPageContentElement::Translate, QPointF(offset, 0.0));
}
break;
}
case Operation::SetSameHeight:
{
QSizeF size = manipulatedElements.front()->getBoundingBox().size();
for (PDFPageContentElement* element : manipulatedElements)
{
size.setWidth(element->getBoundingBox().width());
element->setSize(size);
}
break;
}
case Operation::SetSameWidth:
{
QSizeF size = manipulatedElements.front()->getBoundingBox().size();
for (PDFPageContentElement* element : manipulatedElements)
{
size.setHeight(element->getBoundingBox().height());
element->setSize(size);
}
break;
}
case Operation::SetSameSize:
{
QSizeF size = manipulatedElements.front()->getBoundingBox().size();
for (PDFPageContentElement* element : manipulatedElements)
{
element->setSize(size);
}
break;
}
case Operation::CenterHorizontally:
{
const PDFInteger pageIndex = manipulatedElements.front()->getPageIndex();
QRectF pageMediaBox = getPageMediaBox(pageIndex);
const qreal offset = pageMediaBox.center().x() - representativeRect.center().x();
for (PDFPageContentElement* element : manipulatedElements)
{
element->performManipulation(PDFPageContentElement::Translate, QPointF(offset, 0.0));
}
break;
}
case Operation::CenterVertically:
{
const PDFInteger pageIndex = manipulatedElements.front()->getPageIndex();
QRectF pageMediaBox = getPageMediaBox(pageIndex);
const qreal offset = pageMediaBox.center().y() - representativeRect.center().y();
for (PDFPageContentElement* element : manipulatedElements)
{
element->performManipulation(PDFPageContentElement::Translate, QPointF(0.0, offset));
}
break;
}
case Operation::CenterHorAndVert:
{
const PDFInteger pageIndex = manipulatedElements.front()->getPageIndex();
QRectF pageMediaBox = getPageMediaBox(pageIndex);
const qreal offsetX = pageMediaBox.center().x() - representativeRect.center().x();
const qreal offsetY = pageMediaBox.center().y() - representativeRect.center().y();
QPointF offset(offsetX, offsetY);
for (PDFPageContentElement* element : manipulatedElements)
{
element->performManipulation(PDFPageContentElement::Translate, offset);
}
break;
}
case Operation::LayoutVertically:
{
auto comparator = [](PDFPageContentElement* left, PDFPageContentElement* right)
{
QRectF r1 = left->getBoundingBox();
QRectF r2 = right->getBoundingBox();
return r1.y() > r2.y();
};
std::stable_sort(manipulatedElements.begin(), manipulatedElements.end(), comparator);
qreal yTop = representativeRect.bottom();
for (PDFPageContentElement* element : manipulatedElements)
{
QRectF boundingBox = element->getBoundingBox();
QPointF offset(0.0, yTop - boundingBox.bottom());
element->performManipulation(PDFPageContentElement::Translate, offset);
yTop -= boundingBox.height();
}
break;
}
case Operation::LayoutHorizontally:
{
auto comparator = [](PDFPageContentElement* left, PDFPageContentElement* right)
{
QRectF r1 = left->getBoundingBox();
QRectF r2 = right->getBoundingBox();
return r1.x() < r2.x();
};
std::stable_sort(manipulatedElements.begin(), manipulatedElements.end(), comparator);
qreal x = representativeRect.left();
for (PDFPageContentElement* element : manipulatedElements)
{
QRectF boundingBox = element->getBoundingBox();
QPointF offset(x - boundingBox.left(), 0.0);
element->performManipulation(PDFPageContentElement::Translate, offset);
x += boundingBox.width();
}
break;
}
case Operation::LayoutForm:
{
std::vector<std::pair<PDFPageContentElement*, PDFPageContentElement*>> formLayout;
// Divide elements to left/right side
std::vector<PDFPageContentElement*> elementsLeft;
std::vector<PDFPageContentElement*> elementsRight;
for (PDFPageContentElement* element : manipulatedElements)
{
QRectF boundingBox = element->getBoundingBox();
const qreal distanceLeft = boundingBox.left() - representativeRect.left();
const qreal distanceRight = representativeRect.right() - boundingBox.right();
if (distanceLeft < distanceRight)
{
elementsLeft.push_back(element);
}
else
{
elementsRight.push_back(element);
}
}
// Create pairs of left/right elements
while (!elementsLeft.empty() && !elementsRight.empty())
{
PDFPageContentElement* elementRight = nullptr;
PDFPageContentElement* elementLeft = nullptr;
qreal overlap = 0.0;
// Iterate trough element on the left
for (PDFPageContentElement* elementLeftCurrent : elementsLeft)
{
QRectF leftBoundingBox = elementLeftCurrent->getBoundingBox();
// Find matching element on the right
for (PDFPageContentElement* elementRightCurrent : elementsRight)
{
QRectF rightBoundingBox = elementRightCurrent->getBoundingBox();
if (isRectangleVerticallyOverlapped(leftBoundingBox, rightBoundingBox))
{
QRectF unitedRect = leftBoundingBox.united(rightBoundingBox);
qreal currentOverlap = leftBoundingBox.height() + rightBoundingBox.height() - unitedRect.height();
if (currentOverlap > overlap)
{
overlap = currentOverlap;
elementRight = elementRightCurrent;
elementLeft = elementLeftCurrent;
}
}
}
}
Q_ASSERT((elementLeft != nullptr) == (elementRight != nullptr));
if (elementLeft && elementRight)
{
auto itLeft = std::find(elementsLeft.begin(), elementsLeft.end(), elementLeft);
elementsLeft.erase(itLeft);
auto itRight = std::find(elementsRight.begin(), elementsRight.end(), elementRight);
elementsRight.erase(itRight);
formLayout.emplace_back(elementLeft, elementRight);
continue;
}
else
{
break;
}
}
for (PDFPageContentElement* leftElement : elementsLeft)
{
formLayout.emplace_back(leftElement, nullptr);
}
for (PDFPageContentElement* rightElement : elementsRight)
{
formLayout.emplace_back(nullptr, rightElement);
}
// Sort elements vertically
auto comparator = [](const auto& left, const auto& right)
{
const PDFPageContentElement* l1 = left.first ? left.first : left.second;
const PDFPageContentElement* l2 = left.second ? left.second : left.first;
const PDFPageContentElement* r1 = right.first ? right.first : right.second;
const PDFPageContentElement* r2 = right.second ? right.second : right.first;
QRectF lbb1 = l1->getBoundingBox();
QRectF lbb2 = l2->getBoundingBox();
QRectF rbb1 = r1->getBoundingBox();
QRectF rbb2 = r2->getBoundingBox();
const qreal ly = (lbb1.center().y() + lbb2.center().y()) * 0.5;
const qreal ry = (rbb1.center().y() + rbb2.center().y()) * 0.5;
return ly > ry;
};
std::stable_sort(formLayout.begin(), formLayout.end(), comparator);
// Calculate width
qreal leftWidth = 0.0;
qreal rightWidth = 0.0;
for (const auto& row : formLayout)
{
PDFPageContentElement* elementLeft = row.first;
PDFPageContentElement* elementRight = row.second;
if (elementLeft)
{
qreal width = elementLeft->getBoundingBox().width();
leftWidth = qMax(leftWidth, width);
}
if (elementRight)
{
qreal width = elementRight->getBoundingBox().width();
rightWidth = qMax(rightWidth, width);
}
}
// Now, perform layout
qreal yTop = representativeRect.bottom();
qreal xLeft = representativeRect.left();
qreal xRight = representativeRect.right() - rightWidth;
for (const auto& row : formLayout)
{
PDFPageContentElement* elementLeft = row.first;
PDFPageContentElement* elementRight = row.second;
qreal yHeight = 0.0;
if (elementLeft)
{
QRectF boundingBoxLeft = elementLeft->getBoundingBox();
QPointF offsetLeft(xLeft - boundingBoxLeft.x(), yTop - boundingBoxLeft.bottom());
elementLeft->performManipulation(PDFPageContentElement::Translate, offsetLeft);
yHeight = qMax(yHeight, boundingBoxLeft.height());
}
if (elementRight)
{
QRectF boundingBoxRight = elementRight->getBoundingBox();
QPointF offsetRight(xRight - boundingBoxRight.x(), yTop - boundingBoxRight.bottom());
elementRight->performManipulation(PDFPageContentElement::Translate, offsetRight);
yHeight = qMax(yHeight, boundingBoxRight.height());
}
yTop -= yHeight;
}
break;
}
case Operation::LayoutGrid:
{
std::map<PDFInteger, qreal> rowHeights;
std::map<PDFInteger, qreal> columnWidths;
std::map<PDFPageContentElement*, PDFInteger> elementToRow;
std::map<PDFPageContentElement*, PDFInteger> elementToColumn;
// Detect rows
auto comparatorRow = [](PDFPageContentElement* left, PDFPageContentElement* right)
{
QRectF r1 = left->getBoundingBox();
QRectF r2 = right->getBoundingBox();
return r1.top() < r2.top();
};
std::stable_sort(manipulatedElements.begin(), manipulatedElements.end(), comparatorRow);
PDFInteger row = 0;
std::vector<PDFPageContentElement*> rowElementsToProcess = manipulatedElements;
while (!rowElementsToProcess.empty())
{
PDFPageContentElement* sampleElement = rowElementsToProcess.back();
elementToRow[sampleElement] = row;
rowElementsToProcess.pop_back();
QRectF boundingBox = sampleElement->getBoundingBox();
qreal maxHeight = boundingBox.height();
for (auto it = rowElementsToProcess.begin(); it != rowElementsToProcess.end();)
{
QRectF currentBoundingBox = (*it)->getBoundingBox();
if (isRectangleVerticallyOverlapped(boundingBox, currentBoundingBox))
{
QRectF unitedRect = boundingBox.united(currentBoundingBox);
qreal currentOverlap = boundingBox.height() + currentBoundingBox.height() - unitedRect.height();
if (qFuzzyIsNull(currentOverlap))
{
++it;
continue;
}
elementToRow[*it] = row;
maxHeight = qMax(currentBoundingBox.height(), maxHeight);
it = rowElementsToProcess.erase(it);
}
else
{
++it;
}
}
rowHeights[row] = qMax(rowHeights[row], maxHeight);
++row;
}
// Detect columns
auto comparatorColumn = [](PDFPageContentElement* left, PDFPageContentElement* right)
{
QRectF r1 = left->getBoundingBox();
QRectF r2 = right->getBoundingBox();
return r1.left() > r2.left();
};
std::stable_sort(manipulatedElements.begin(), manipulatedElements.end(), comparatorColumn);
PDFInteger column = 0;
std::vector<PDFPageContentElement*> columnElementsToProcess = manipulatedElements;
while (!columnElementsToProcess.empty())
{
PDFPageContentElement* sampleElement = columnElementsToProcess.back();
elementToColumn[sampleElement] = column;
columnElementsToProcess.pop_back();
QRectF boundingBox = sampleElement->getBoundingBox();
qreal maxWidth = boundingBox.width();
for (auto it = columnElementsToProcess.begin(); it != columnElementsToProcess.end();)
{
QRectF currentBoundingBox = (*it)->getBoundingBox();
if (isRectangleHorizontallyOverlapped(boundingBox, currentBoundingBox))
{
QRectF unitedRect = boundingBox.united(currentBoundingBox);
qreal currentOverlap = boundingBox.width() + currentBoundingBox.width() - unitedRect.width();
if (qFuzzyIsNull(currentOverlap))
{
++it;
continue;
}
elementToColumn[*it] = column;
maxWidth = qMax(currentBoundingBox.width(), maxWidth);
it = columnElementsToProcess.erase(it);
}
else
{
++it;
}
}
columnWidths[column] = qMax(columnWidths[column], maxWidth);
++column;
}
// Calculate cell offsets
std::vector<qreal> cellOffsetX(column, 0.0);
std::vector<qreal> cellOffsetY(row, 0.0);
for (size_t i = 1; i < size_t(column); ++i)
{
cellOffsetX[i] = cellOffsetX[i - 1] + columnWidths[i - 1];
}
for (size_t i = 1; i < size_t(row); ++i)
{
cellOffsetY[i] = cellOffsetY[i - 1] + rowHeights[i - 1];
}
// Move elements
qreal xLeft = representativeRect.left();
qreal yTop = representativeRect.bottom();
for (PDFPageContentElement* element : manipulatedElements)
{
const PDFInteger currentRow = elementToRow[element];
const PDFInteger currentColumn = elementToColumn[element];
const qreal xOffset = cellOffsetX[currentColumn];
const qreal yOffset = cellOffsetY[currentRow];
QRectF boundingBox = element->getBoundingBox();
QPointF offset(xLeft + xOffset - boundingBox.left(), yTop - yOffset - boundingBox.bottom());
element->performManipulation(PDFPageContentElement::Translate, offset);
}
break;
}
}
for (PDFPageContentElement* element : manipulatedElements)
{
m_scene->replaceElement(element);
}
}
void PDFPageContentElementManipulator::performDeleteSelection()
{
cancelManipulation();
m_scene->removeElementsById(m_selection);
deselectAll();
}
void PDFPageContentElementManipulator::startManipulation(PDFInteger pageIndex,
const QPointF& startPoint,
const QPointF& currentPoint,
PDFReal snapPointDistanceThreshold)
{
Q_ASSERT(!isManipulationInProgress());
// Collect elements to be manipulated
for (const PDFInteger id : m_selection)
{
const PDFPageContentElement* element = m_scene->getElementById(id);
if (!element || element->getPageIndex() != pageIndex)
{
continue;
}
uint manipulationMode = element->getManipulationMode(startPoint, snapPointDistanceThreshold);
if (!manipulationMode)
{
manipulationMode = PDFPageContentElement::Translate;
}
// Jakub Melka: manipulate this element
m_manipulatedElements.emplace_back(element->clone());
m_manipulationModes[id] = manipulationMode;
}
if (!m_manipulatedElements.empty())
{
m_isManipulationInProgress = true;
m_lastUpdatedPoint = startPoint;
updateManipulation(pageIndex, startPoint, currentPoint);
emit stateChanged();
}
}
void PDFPageContentElementManipulator::updateManipulation(PDFInteger pageIndex,
const QPointF& startPoint,
const QPointF& currentPoint)
{
Q_UNUSED(startPoint);
QPointF offset = currentPoint - m_lastUpdatedPoint;
for (const auto& element : m_manipulatedElements)
{
if (element->getPageIndex() == pageIndex)
{
element->performManipulation(m_manipulationModes[element->getElementId()], offset);
}
}
m_lastUpdatedPoint = currentPoint;
emit stateChanged();
}
void PDFPageContentElementManipulator::finishManipulation(PDFInteger pageIndex,
const QPointF& startPoint,
const QPointF& currentPoint,
bool createCopy)
{
Q_ASSERT(isManipulationInProgress());
updateManipulation(pageIndex, startPoint, currentPoint);
if (createCopy)
{
for (const auto& element : m_manipulatedElements)
{
m_scene->addElement(element->clone());
}
}
else
{
for (const auto& element : m_manipulatedElements)
{
m_scene->replaceElement(element->clone());
}
}
cancelManipulation();
}
void PDFPageContentElementManipulator::cancelManipulation()
{
if (isManipulationInProgress())
{
m_isManipulationInProgress = false;
m_manipulatedElements.clear();
m_manipulationModes.clear();
emit stateChanged();
}
Q_ASSERT(!m_isManipulationInProgress);
Q_ASSERT(m_manipulatedElements.empty());
Q_ASSERT(m_manipulationModes.empty());
}
void PDFPageContentElementManipulator::drawPage(QPainter* painter,
PDFInteger pageIndex,
const PDFPrecompiledPage* compiledPage,
PDFTextLayoutGetter& layoutGetter,
const QTransform& pagePointToDevicePointMatrix,
QList<PDFRenderError>& errors) const
{
// Draw selection
if (!isSelectionEmpty())
{
QPainterPath selectionPath;
for (const PDFInteger id : m_selection)
{
if (PDFPageContentElement* element = m_scene->getElementById(id))
{
QPainterPath tempPath;
tempPath.addRect(element->getBoundingBox());
selectionPath = selectionPath.united(tempPath);
}
}
if (!selectionPath.isEmpty())
{
PDFPainterStateGuard guard(painter);
QPen pen(Qt::SolidLine);
pen.setWidthF(2.0);
pen.setColor(QColor::fromRgbF(0.8f, 0.8f, 0.1f, 0.7f));
QBrush brush(Qt::SolidPattern);
brush.setColor(QColor::fromRgbF(1.0f, 1.0f, 0.0f, 0.2f));
painter->setPen(std::move(pen));
painter->setBrush(std::move(brush));
selectionPath = pagePointToDevicePointMatrix.map(selectionPath);
painter->drawPath(selectionPath);
}
}
// Draw dragged items
if (isManipulationInProgress())
{
PDFPainterStateGuard guard(painter);
painter->setOpacity(0.2);
for (const auto& manipulatedElement : m_manipulatedElements)
{
manipulatedElement->drawPage(painter, pageIndex, compiledPage, layoutGetter, pagePointToDevicePointMatrix, errors);
}
}
}
QRectF PDFPageContentElementManipulator::getSelectionBoundingRect() const
{
QRectF rect;
for (const PDFInteger elementId : m_selection)
{
if (const PDFPageContentElement* element = m_scene->getElementById(elementId))
{
rect = rect.united(element->getBoundingBox());
}
}
return rect;
}
QRectF PDFPageContentElementManipulator::getPageMediaBox(PDFInteger pageIndex) const
{
if (pageIndex < 0)
{
return QRectF();
}
if (const PDFDocument* document = m_scene->getDocument())
{
size_t pageCount = document->getCatalog()->getPageCount();
if (size_t(pageIndex) < pageCount)
{
const PDFPage* page = document->getCatalog()->getPage(pageIndex);
return page->getMediaBox();
}
}
return QRectF();
}
void PDFPageContentElementManipulator::eraseSelectedElementById(PDFInteger id)
{
auto it = std::find(m_selection.begin(), m_selection.end(), id);
if (it != m_selection.end())
{
m_selection.erase(it);
}
}
PDFPageContentElementTextBox* PDFPageContentElementTextBox::clone() const
{
PDFPageContentElementTextBox* copy = new PDFPageContentElementTextBox();
copy->setElementId(getElementId());
copy->setPageIndex(getPageIndex());
copy->setPen(getPen());
copy->setBrush(getBrush());
copy->setRectangle(getRectangle());
copy->setText(getText());
copy->setFont(getFont());
copy->setAngle(getAngle());
copy->setAlignment(getAlignment());
return copy;
}
void PDFPageContentElementTextBox::drawPage(QPainter* painter,
PDFInteger pageIndex,
const PDFPrecompiledPage* compiledPage,
PDFTextLayoutGetter& layoutGetter,
const QTransform& pagePointToDevicePointMatrix,
QList<PDFRenderError>& errors) const
{
Q_UNUSED(compiledPage);
Q_UNUSED(layoutGetter);
Q_UNUSED(errors);
if (pageIndex != getPageIndex())
{
return;
}
QRectF rect = getRectangle();
QFont font = getFont();
font.setHintingPreference(QFont::PreferNoHinting);
if (font.pointSizeF() > 0.0)
{
font.setPixelSize(qRound(font.pointSizeF()));
}
PDFPainterStateGuard guard(painter);
painter->setWorldTransform(QTransform(pagePointToDevicePointMatrix), true);
painter->setPen(getPen());
painter->setBrush(getBrush());
painter->setFont(font);
painter->setRenderHint(QPainter::Antialiasing);
painter->setClipRect(rect, Qt::IntersectClip);
painter->translate(rect.center());
painter->scale(1.0, -1.0);
QTextOption option;
option.setAlignment(getAlignment());
QRectF textRect(-rect.width() * 0.5, -rect.height() * 0.5, rect.width(), rect.height());
if (qFuzzyIsNull(getAngle()))
{
painter->drawText(textRect, getText(), option);
}
else
{
QRectF textBoundingRect = painter->boundingRect(textRect, getText(), option);
QTransform matrix;
matrix.rotate(getAngle());
QRectF mappedTextBoundingRect = matrix.mapRect(textBoundingRect);
switch (getAlignment() & Qt::AlignHorizontal_Mask)
{
case Qt::AlignLeft:
mappedTextBoundingRect.moveLeft(textRect.left());
break;
case Qt::AlignHCenter:
mappedTextBoundingRect.moveLeft(textRect.left() + textRect.width() * 0.5 - mappedTextBoundingRect.width() * 0.5);
break;
case Qt::AlignRight:
mappedTextBoundingRect.moveRight(textRect.right());
break;
default:
Q_ASSERT(false);
break;
}
switch (getAlignment() & Qt::AlignVertical_Mask)
{
case Qt::AlignTop:
mappedTextBoundingRect.moveTop(textRect.top());
break;
case Qt::AlignVCenter:
mappedTextBoundingRect.moveTop(textRect.top() + textRect.height() * 0.5 - mappedTextBoundingRect.height() * 0.5);
break;
case Qt::AlignBottom:
mappedTextBoundingRect.moveBottom(textRect.bottom());
break;
default:
Q_ASSERT(false);
break;
}
painter->translate(mappedTextBoundingRect.center());
painter->rotate(getAngle());
textBoundingRect.moveCenter(QPointF(0, 0));
painter->drawText(textBoundingRect, getText(), option);
}
}
uint PDFPageContentElementTextBox::getManipulationMode(const QPointF& point,
PDFReal snapPointDistanceThreshold) const
{
return getRectangleManipulationMode(getRectangle(), point, snapPointDistanceThreshold);
}
void PDFPageContentElementTextBox::performManipulation(uint mode, const QPointF& offset)
{
performRectangleManipulation(m_rectangle, mode, offset);
}
QRectF PDFPageContentElementTextBox::getBoundingBox() const
{
return m_rectangle;
}
void PDFPageContentElementTextBox::setSize(QSizeF size)
{
performRectangleSetSize(m_rectangle, size);
}
QString PDFPageContentElementTextBox::getDescription() const
{
return formatDescription(PDFTranslationContext::tr("Text box '%1'").arg(getText()));
}
const QString& PDFPageContentElementTextBox::getText() const
{
return m_text;
}
void PDFPageContentElementTextBox::setText(const QString& newText)
{
m_text = newText;
}
const QFont& PDFPageContentElementTextBox::getFont() const
{
return m_font;
}
void PDFPageContentElementTextBox::setFont(const QFont& newFont)
{
m_font = newFont;
}
PDFReal PDFPageContentElementTextBox::getAngle() const
{
return m_angle;
}
void PDFPageContentElementTextBox::setAngle(PDFReal newAngle)
{
m_angle = newAngle;
}
const Qt::Alignment& PDFPageContentElementTextBox::getAlignment() const
{
return m_alignment;
}
void PDFPageContentElementTextBox::setAlignment(const Qt::Alignment& newAlignment)
{
m_alignment = newAlignment;
}
} // namespace pdf
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