dotfiles/pkgs/krita/fix-painting-api-crashes.patch

diff --git a/libs/libkis/Node.cpp b/libs/libkis/Node.cpp
index 84f24d3..0e2370e 100644
--- a/libs/libkis/Node.cpp
+++ b/libs/libkis/Node.cpp
@@ -76,6 +76,8 @@
 #include "KisAsynchronousStrokeUpdateHelper.h"
 #include "kis_stroke_strategy.h"
 #include "PaintingResources.h"
+#include "KisMainWindow.h"
+#include "kis_canvas2.h"
 
 
 struct Node::Private {
@@ -833,8 +835,48 @@ KisNodeSP Node::node() const
     return d->node;
 }
 
+QString Node::paintAbility()
+{
+    // Taken from KisTool:nodePaintAbility().
+    KisMainWindow *mainWindow = KisPart::instance()->currentMainwindow();
+    KisCanvas2 *canvas = mainWindow->activeView()->canvasBase();
+    if (canvas->resourceManager()->resource(KoCanvasResource::CurrentPaintOpPreset).isNull()) {
+        return "UNPAINTABLE";
+    }
+
+    if (!d->node) {
+        return "UNPAINTABLE";
+    }
+
+    if (d->node->inherits("KisShapeLayer")) {
+        return "VECTOR";
+    }
+    if (d->node->inherits("KisCloneLayer")) {
+        return "CLONE";
+    }
+    if (d->node->paintDevice()) {
+
+        KisPaintOpPresetSP currentPaintOpPreset = canvas->resourceManager()->resource(KoCanvasResource::CurrentPaintOpPreset).value<KisPaintOpPresetSP>();
+        if (currentPaintOpPreset->paintOp().id() == "mypaintbrush") {
+            const KoColorSpace *colorSpace = d->node->paintDevice()->colorSpace();
+            if (colorSpace->colorModelId() != RGBAColorModelID) {
+                return "MYPAINTBRUSH_UNPAINTABLE";
+            }
+        }
+
+        return "PAINT";
+    }
+
+    return "UNPAINTABLE";
+}
+
 void Node::paintLine(const QPointF pointOne, const QPointF pointTwo)
 {
+    if (paintAbility() != "PAINT") {
+        dbgScript << "Script attempted to use Node::paintLine() on an unpaintable node, ignoring.";
+        return;
+    }
+
     KisPaintInformation pointOneInfo;
     pointOneInfo.setPressure(1.0);
     pointOneInfo.setPos(pointOne);
@@ -850,6 +892,11 @@ void Node::paintLine(const QPointF pointOne, const QPointF pointTwo)
 
 void Node::paintRectangle(const QRectF &rect)
 {
+    if (paintAbility() != "PAINT") {
+        dbgScript << "Script attempted to use Node::paintRectangle() on an unpaintable node, ignoring.";
+        return;
+    }
+
     // reference class where this stuff is being done. Maybe can use the "facade" like that does for setup?
     // void KisFigurePaintingToolHelper::paintRect(const QRectF &rect)
 
@@ -860,6 +907,11 @@ void Node::paintRectangle(const QRectF &rect)
 
 void Node::paintPolygon(const QList<QPointF> listPoint)
 {
+    if (paintAbility() != "PAINT") {
+        dbgScript << "Script attempted to use Node::paintPolygon() on an unpaintable node, ignoring.";
+        return;
+    }
+
     // strategy needs points in vPointF format
     QVector<QPointF> points = points.fromList(listPoint);
     KisFigurePaintingToolHelper helper = PaintingResources::createHelper(d->image);
@@ -869,6 +921,11 @@ void Node::paintPolygon(const QList<QPointF> listPoint)
 
 void Node::paintEllipse(const QRectF &rect)
 {
+    if (paintAbility() != "PAINT") {
+        dbgScript << "Script attempted to use Node::paintEllipse() on an unpaintable node, ignoring.";
+        return;
+    }
+
     KisFigurePaintingToolHelper helper = PaintingResources::createHelper(d->image);
     helper.paintEllipse(rect);
 }
@@ -876,6 +933,11 @@ void Node::paintEllipse(const QRectF &rect)
 
 void Node::paintPath(const QPainterPath &path)
 {
+    if (paintAbility() != "PAINT") {
+        dbgScript << "Script attempted to use Node::paintPath() on an unpaintable node, ignoring.";
+        return;
+    }
+
     KisFigurePaintingToolHelper helper = PaintingResources::createHelper(d->image);
     helper.paintPainterPath(path);
 }
diff --git a/libs/libkis/Node.h b/libs/libkis/Node.h
index 10daba4..89a6f40 100644
--- a/libs/libkis/Node.h
+++ b/libs/libkis/Node.h
@@ -601,6 +601,18 @@ public Q_SLOTS:
      */
     void paintPath(const QPainterPath &path);
 
+    /**
+     * @brief paintAbility can be used to determine whether this node can be painted on with the current brush preset.
+     * @return QString, one of the following:
+     * <ul>
+     * <li>VECTOR - This node is vector-based.</li>
+     * <li>CLONE - This node is a Clone Layer.</li>
+     * <li>PAINT - This node is paintable by the current brush preset.</li>
+     * <li>UNPAINTABLE - This node is not paintable, or a null preset is somehow selected./li>
+     * <li>MYPAINTBRUSH_UNPAINTABLE - This node's non-RGBA colorspace cannot be painted on by the currently selected MyPaint brush.</li>
+     */
+    QString paintAbility();
+
 private:
 
     friend class Filter;
diff --git a/plugins/extensions/pykrita/sip/krita/Node.sip b/plugins/extensions/pykrita/sip/krita/Node.sip
index cbcef0f..6270bd9 100644
--- a/plugins/extensions/pykrita/sip/krita/Node.sip
+++ b/plugins/extensions/pykrita/sip/krita/Node.sip
@@ -75,6 +75,7 @@ public Q_SLOTS:
     void paintPolygon(const QList<QPointF> points);
     void paintEllipse(const QRectF &rect);
     void paintPath(const QPainterPath &path);
+    QString paintAbility();
 Q_SIGNALS:
 private:
 };