feat: drawing popout now clips strokes again + add redo + add undo and redo keybinds

Plugins/ZShell/Internal/strokecanvasrenderer.hpp

@@ -1,26 +1,58 @@
 #pragma once
 
+#include <QCanvasCustomBrush>
 #include <QCanvasPainterItemRenderer>
+#include <QHash>
+#include <QRectF>
+#include <QVector4D>
 #include <qcontainerfwd.h>
 #include "stroke.hpp"
 
 namespace ZShell::internal {
 
+struct BrushEntry {
+	QCanvasCustomBrush brush;
+	qint64 holeToken = -1; // hole generation this brush was built with
+};
+
 class StrokeCanvasRenderer final : public QCanvasPainterItemRenderer {
 	public:
 	void synchronizeData(QCanvasPainterItem* item) override;
 	void paint(QCanvasPainter* painter) override;
 
 	private:
+	QCanvasCustomBrush& brushFor(const QColor& color);
+	void updateBrushHole();
+	void drawStroke(
+		QCanvasPainter* painter,
+		const QVector<QPointF>& points,
+		const QColor& color,
+		qreal width,
+		bool polyline);
+	void drawHoverCursor(
+		QCanvasPainter* painter,
+		const QPointF& point,
+		qreal penWidth,
+		QColor penColor,
+		bool isDrawing);
+
 	QColor m_penColor;
 	qreal m_penWidth = 4.0;
 	bool m_hoverVisible = false;
 	QPointF m_hoverPoint;
 	bool m_isDrawing = false;
+	QRectF m_hole;
+	qreal m_holeRadius = 0.0;
+	qreal m_devicePixelRatio = 1.0;
 
+	QVector4D m_lastHoleData1;
+	QVector4D m_lastHoleData3;
+	QVector4D m_lastHoleData4;
+	qint64 m_holeToken = 0;
 	QVector<Stroke> m_strokes;
 	Stroke m_currentStroke;
 	QVector<int> m_pendingGroupRemovals;
+	QHash<QRgb, BrushEntry> m_brushes;
 };
 
 }; // namespace ZShell::internal