From ba07153e79390fea754342c51a1a669add711d95 Mon Sep 17 00:00:00 2001
From: Tuukka Lehtonen <tuukka.lehtonen@semantum.fi>
Date: Fri, 22 Sep 2017 09:31:55 +0300
Subject: [PATCH] Robustness fixes for inline SVG text editing on diagrams

This fixes the code to not assume during scene graph rendering that the
canvas context is hosted by an AWTChassis.

refs #7458

Change-Id: Ibb9955424784a1d3c2069d6a668559d95d88b181
---
 .../diagram/elements/DiagramNodeUtil.java     |  6 +++---
 .../diagram/elements/EditorStateManager.java  | 13 ++++++++----
 .../simantics/diagram/elements/SVGNode.java   | 20 +++++++++----------
 3 files changed, 22 insertions(+), 17 deletions(-)

diff --git a/bundles/org.simantics.diagram/src/org/simantics/diagram/elements/DiagramNodeUtil.java b/bundles/org.simantics.diagram/src/org/simantics/diagram/elements/DiagramNodeUtil.java
index 859154d0b..893573d0f 100644
--- a/bundles/org.simantics.diagram/src/org/simantics/diagram/elements/DiagramNodeUtil.java
+++ b/bundles/org.simantics.diagram/src/org/simantics/diagram/elements/DiagramNodeUtil.java
@@ -43,7 +43,7 @@ import org.simantics.simulation.ontology.SimulationResource;
 public class DiagramNodeUtil {
 
     public static ICanvasContext getCanvasContext(IG2DNode node) {
-        G2DSceneGraph sg = NodeUtil.getPossibleRootNode(node);
+        G2DSceneGraph sg = node.getRootNode2D();
         if (sg == null)
             return null;
         Component rootPane = sg.getRootPane();
@@ -55,7 +55,7 @@ public class DiagramNodeUtil {
     }
 
     public static ICanvasContext getPossibleCanvasContext(IG2DNode node) {
-        G2DSceneGraph sg = NodeUtil.getPossibleRootNode(node);
+        G2DSceneGraph sg = node.getRootNode2D();
         if (sg == null)
             return null;
         Component rootPane = sg.getRootPane();
@@ -236,7 +236,7 @@ public class DiagramNodeUtil {
     }
     
     public static final Set<String> getTexts(Set<TextNode> nodes) {
-        Set<String> result = new HashSet<String>();
+        Set<String> result = new HashSet<String>(nodes.size());
         for(TextNode n : nodes) result.add(n.getText());
         return result;
     }
diff --git a/bundles/org.simantics.diagram/src/org/simantics/diagram/elements/EditorStateManager.java b/bundles/org.simantics.diagram/src/org/simantics/diagram/elements/EditorStateManager.java
index 8ddb16ac7..5c59177cc 100644
--- a/bundles/org.simantics.diagram/src/org/simantics/diagram/elements/EditorStateManager.java
+++ b/bundles/org.simantics.diagram/src/org/simantics/diagram/elements/EditorStateManager.java
@@ -67,6 +67,9 @@ class EditorStateManager {
 		String currentText = span.getText();
 
 		SingleElementNode sne = node.getSingleElementNode();
+		if (sne == null)
+			return;
+
 		Function1<String,String> fullTextFunction = sne.getParameter("textEditorFullText"); 
 		if(fullTextFunction != null)
 			es.currentText = fullTextFunction.apply(es.base.textElementId);
@@ -114,10 +117,12 @@ class EditorStateManager {
 
 	void applyEdit() {
 		SingleElementNode sne = node.getSingleElementNode();
-		EditorState es = currentState();
-		Function2<String,String,Object> editor = sne.getParameter("textEditor");
-		if(editor != null) {
-			editor.apply(es.base.textElementId, es.currentText);
+		if (sne != null) {
+			EditorState es = currentState();
+			Function2<String,String,Object> editor = sne.getParameter("textEditor");
+			if(editor != null) {
+				editor.apply(es.base.textElementId, es.currentText);
+			}
 		}
 	}
 
diff --git a/bundles/org.simantics.diagram/src/org/simantics/diagram/elements/SVGNode.java b/bundles/org.simantics.diagram/src/org/simantics/diagram/elements/SVGNode.java
index 8084c2a41..bccba4aa7 100644
--- a/bundles/org.simantics.diagram/src/org/simantics/diagram/elements/SVGNode.java
+++ b/bundles/org.simantics.diagram/src/org/simantics/diagram/elements/SVGNode.java
@@ -51,12 +51,14 @@ public class SVGNode extends org.simantics.scenegraph.g2d.nodes.SVGNode {
     public void render(Graphics2D g2d) {
         if (!parametersProcessed) {
             SingleElementNode sne = getSingleElementNode();
-            Boolean enableEditing = sne.getParameter("enableEditing");
-            if (enableEditing != null && enableEditing) {
-                esm = new EditorStateManager(this);
-                addEventHandler(this);
+            if (sne != null) {
+                Boolean enableEditing = sne.getParameter("enableEditing");
+                if (enableEditing != null && enableEditing) {
+                    esm = new EditorStateManager(this);
+                    addEventHandler(this);
+                }
+                parametersProcessed = true;
             }
-            parametersProcessed = true;
         }
 
         super.render(g2d);
@@ -76,7 +78,9 @@ public class SVGNode extends org.simantics.scenegraph.g2d.nodes.SVGNode {
     }
 
     private boolean isSelected(IG2DNode node) {
-        ICanvasContext ctx = DiagramNodeUtil.getCanvasContext(this);
+        ICanvasContext ctx = DiagramNodeUtil.getPossibleCanvasContext(this);
+        if (ctx == null)
+            return false;
         IElement ie = DiagramNodeUtil.getElement(ctx, node);
         if (ie == null)
             return false;
@@ -119,10 +123,6 @@ public class SVGNode extends org.simantics.scenegraph.g2d.nodes.SVGNode {
     }
 
     SingleElementNode getSingleElementNode() {
-        ICanvasContext ctx = DiagramNodeUtil.getCanvasContext(this);
-        // FIXME: needed only because eventdelegator registrations are done before adding node to scene graph.
-        if (ctx == null)
-            return null;
         return (SingleElementNode)NodeUtil.getNearestParentOfType(this, SingleElementNode.class);
     }
 
-- 
2.43.2