File indexing completed on 2024-06-16 04:17:51

 /*
  * SPDX-FileCopyrightText: 2023 Alvin Wong <alvin@alvinhc.com>
  *
  * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 #include "SvgCreateTextStrategy.h"
 #include "SvgTextTool.h"
 
 #include <QFontDatabase>
 #include <QRectF>
 #include <QTimer>
 
 #include "KisHandlePainterHelper.h"
 #include "KoCanvasBase.h"
 #include "KoProperties.h"
 #include "KoSelection.h"
 #include "KoShapeController.h"
 #include "KoShapeFactoryBase.h"
 #include "KoShapeRegistry.h"
 #include "KoToolBase.h"
 #include "KoViewConverter.h"
 #include "KoSnapGuide.h"
 #include "commands/KoKeepShapesSelectedCommand.h"
 #include "kis_global.h"
 #include "kundo2command.h"
 
 SvgCreateTextStrategy::SvgCreateTextStrategy(SvgTextTool *tool, const QPointF &clicked)
     : KoInteractionStrategy(tool)
     , m_dragStart(clicked)
     , m_dragEnd(clicked)
 {
     const QFontMetrics fontMetrics = QFontMetrics(tool->defaultFont());
     double lineHeight = (fontMetrics.lineSpacing() / fontMetrics.fontDpi()) * 72.0;
     m_minSizeInline = {lineHeight, lineHeight};
 }
 
 void SvgCreateTextStrategy::paint(QPainter &painter, const KoViewConverter &converter)
 {
     const QTransform originalPainterTransform = painter.transform();
     painter.setTransform(converter.documentToView(), true);
     KisHandlePainterHelper handlePainter(&painter, originalPainterTransform, 0.0, decorationThickness());
 
     const QPolygonF poly(QRectF(m_dragStart, m_dragEnd));
     handlePainter.setHandleStyle(KisHandleStyle::primarySelection());
     handlePainter.drawRubberLine(poly);
 }
 
 void SvgCreateTextStrategy::handleMouseMove(const QPointF &mouseLocation, Qt::KeyboardModifiers modifiers)
 {
     m_dragEnd = this->tool()->canvas()->snapGuide()->snap(mouseLocation, modifiers);
     m_modifiers = modifiers;
     const QRectF updateRect = QRectF(m_dragStart, m_dragEnd).normalized();
     tool()->canvas()->updateCanvas(kisGrowRect(updateRect, 100));
 }
 
 KUndo2Command *SvgCreateTextStrategy::createCommand()
 {
     SvgTextTool *const tool = qobject_cast<SvgTextTool *>(this->tool());
 
     QRectF rectangle = QRectF(m_dragStart, m_dragEnd).normalized();
 
     const QFontMetrics fontMetrics = QFontMetrics(tool->defaultFont());
     double ascender = fontMetrics.ascent();
     ascender += fontMetrics.leading()/2;
     ascender = (ascender / fontMetrics.fontDpi()) * 72.0; // 72 points in an inch.
     double lineHeight = (fontMetrics.lineSpacing() / fontMetrics.fontDpi()) * 72.0;
     const KoSvgText::WritingMode writingMode = KoSvgText::WritingMode(tool->writingMode());
 
     bool unwrappedText = m_modifiers.testFlag(Qt::ControlModifier);
     if (rectangle.width() < m_minSizeInline.width() && rectangle.height() < m_minSizeInline.height()) {
         unwrappedText = true;
     }
     QString extraProperties;
     if (!unwrappedText) {
         if (writingMode == KoSvgText::HorizontalTB) {
             extraProperties = QLatin1String("inline-size:%1;").arg(QString::number(rectangle.width()));
         } else {
             extraProperties = QLatin1String("inline-size:%1;").arg(QString::number(rectangle.height()));
         }
     }
     KoShapeFactoryBase *factory = KoShapeRegistry::instance()->value("KoSvgTextShapeID");
     KoProperties *params = new KoProperties();//Fill these with "svgText", "defs" and "shapeRect"
     params->setProperty("defs", QVariant(tool->generateDefs(extraProperties)));
 
     QPointF origin = rectangle.topLeft();
 
     {
         const Qt::Alignment halign = tool->horizontalAlign();
         const bool isRtl = tool->isRtl();
 
         if (writingMode == KoSvgText::HorizontalTB) {
             origin.setY(rectangle.top() + ascender);
             if (halign & Qt::AlignCenter) {
                 origin.setX(rectangle.center().x());
             } else if ((halign & Qt::AlignRight && !isRtl) || (halign & Qt::AlignLeft && isRtl)) {
                 origin.setX(rectangle.right());
             }
         } else {
             if (writingMode == KoSvgText::VerticalRL) {
                 origin.setX(rectangle.right() - (lineHeight*0.5));
             } else {
                 origin.setX(rectangle.left() + (lineHeight*0.5));
             }
 
             if (halign & Qt::AlignCenter) {
                 origin.setY(rectangle.center().y());
             } else if (halign & Qt::AlignRight) {
                 origin.setY(rectangle.bottom());
             }
         }
     }
     if (!rectangle.contains(origin) && unwrappedText) {
         origin = writingMode == KoSvgText::HorizontalTB? QPointF(origin.x(), rectangle.bottom()): QPointF(rectangle.center().x(), origin.y());
     }
     params->setProperty("shapeRect", QVariant(rectangle));
     params->setProperty("origin", QVariant(origin));
 
     KoShape *textShape = factory->createShape( params, tool->canvas()->shapeController()->resourceManager());
 
     KUndo2Command *parentCommand = new KUndo2Command();
 
     new KoKeepShapesSelectedCommand(tool->koSelection()->selectedShapes(), {}, tool->canvas()->selectedShapesProxy(), false, parentCommand);
 
     KUndo2Command *cmd = tool->canvas()->shapeController()->addShape(textShape, 0, parentCommand);
     parentCommand->setText(cmd->text());
 
     new KoKeepShapesSelectedCommand({}, {textShape}, tool->canvas()->selectedShapesProxy(), true, parentCommand);
     tool->canvas()->snapGuide()->reset();
 
     return parentCommand;
 }
 
 void SvgCreateTextStrategy::cancelInteraction()
 {
     tool()->canvas()->snapGuide()->reset();
     const QRectF updateRect = QRectF(m_dragStart, m_dragEnd).normalized();
     tool()->canvas()->updateCanvas(updateRect);
 }
 
 void SvgCreateTextStrategy::finishInteraction(Qt::KeyboardModifiers modifiers)
 {
     m_modifiers = modifiers;
 }
 
 bool SvgCreateTextStrategy::draggingInlineSize()
 {
     QRectF rectangle = QRectF(m_dragStart, m_dragEnd).normalized();
     return (rectangle.width() >= m_minSizeInline.width() || rectangle.height() >= m_minSizeInline.height()) && !m_modifiers.testFlag(Qt::ControlModifier);
 }