Improved scaling of diagrams rendered into selectable SVG. (refs #7593)

Merge of change 1184.

Change-Id: I27ad59665d0be021a1fcd8d68e6d4eca0edc3fda

diff --git a/bundles/org.simantics.modeling/scl/Simantics/Scenegraph.scl b/bundles/org.simantics.modeling/scl/Simantics/Scenegraph.scl
index 5bf540e3563fdfd9649086af82a55e79393e59d2..6a1ecd8fcb67cc33ac4607e4a8b05ec11daf521f 100644 (file)
--- a/bundles/org.simantics.modeling/scl/Simantics/Scenegraph.scl
+++ b/bundles/org.simantics.modeling/scl/Simantics/Scenegraph.scl
@@ -60,6 +60,10 @@ importJava "org.simantics.modeling.SCLScenegraph" where
     
     renderSVG :: ICanvasContext -> <Proc> String
 
+    "Render an SVG with known width and height in pixels: `renderScaledSVG context width height`"
+    @JavaName renderSVG
+    renderScaledSVG :: ICanvasContext -> Double -> Double -> <Proc> String
+
 getSceneGraphProvider :: Diagram -> <Proc> ICanvasSceneGraphProvider
 getSceneGraphProvider diagram = do
     diagramName = syncRead(\() -> getSafeName diagram)

diff --git a/bundles/org.simantics.modeling/src/org/simantics/modeling/SCLScenegraph.java b/bundles/org.simantics.modeling/src/org/simantics/modeling/SCLScenegraph.java
index e0c198388e41f20a0f6848c22b2e70ae34b0ea2f..1e80b832d70aa15fbc2752772792e8202175a08d 100644 (file)
--- a/bundles/org.simantics.modeling/src/org/simantics/modeling/SCLScenegraph.java
+++ b/bundles/org.simantics.modeling/src/org/simantics/modeling/SCLScenegraph.java
@@ -422,20 +422,7 @@ public class SCLScenegraph {
 
        }
 
-       public static Element renderSVGNode(IG2DNode node) {
-
-               // Get a DOMImplementation.
-               DOMImplementation domImpl = GenericDOMImplementation.getDOMImplementation();
-
-               // Create an instance of org.w3c.dom.Document.
-               String svgNS = "http://www.w3.org/2000/svg";
-               Document document = domImpl.createDocument(svgNS, "svg", null);
-
-               SVGGeneratorContext ctx = SVGGeneratorContext.createDefault(document);
-               ctx.setComment(null);
-
-               // Create an instance of the SVG Generator.
-               SVGGraphics2D svgGenerator = new Generator(ctx, false);
+       public static Element renderSVGNode(SVGGraphics2D svgGenerator, IG2DNode node) {
 
                try {
 
@@ -492,7 +479,11 @@ public class SCLScenegraph {
        }
 
        public static String renderSVG3(ICanvasContext ctx) {
-        return renderSVG0(ctx, p0 -> p0.stream().collect(Collectors.toMap(p1 -> p1, p2 -> p2)));
+               return renderSVG3(ctx, -1, -1);
+       }
+
+       public static String renderSVG3(ICanvasContext ctx, double width, double height) {
+        return renderSVG0(width, height, ctx, p0 -> p0.stream().collect(Collectors.toMap(p1 -> p1, p2 -> p2)));
        }
 
     /**
@@ -513,11 +504,19 @@ public class SCLScenegraph {
      * Default no-op mapper
      */
     private static final Function1<Set<?>, Map<?, ?>> mapper = p0 -> p0.stream().collect(Collectors.toMap(p1 -> p1, p2 -> p2));
-    
+
+    public static String renderSVG(ICanvasContext ctx, double width, double height) {
+        return renderSVG0(width, height, ctx, mapper);
+    }
+
     public static String renderSVG(ICanvasContext ctx) {
-        return renderSVG0(ctx, mapper);
+       return renderSVG(ctx, -1, -1);
     }
 
+    public static String renderSVGMapIdentifiers(ICanvasContext ctx) {
+               return renderSVGMapIdentifiers(ctx, -1, -1);
+    }
+    
     /**
      * Renders ICanvasContext into SVG by mapping the SVG id's into URI based
      * GUID's
@@ -525,8 +524,8 @@ public class SCLScenegraph {
      * @param ctx
      * @return
      */
-    public static String renderSVGMapIdentifiers(ICanvasContext ctx) {
-        return renderSVG0(ctx, new Function1<Set<?>, Map<?, ?>>() {
+    public static String renderSVGMapIdentifiers(ICanvasContext ctx, double width, double height) {
+        return renderSVG0(width, height, ctx, new Function1<Set<?>, Map<?, ?>>() {
 
             @Override
             public Map<?, ?> apply(Set<?> p0) {
@@ -610,7 +609,7 @@ public class SCLScenegraph {
        
     }
     
-       private static String renderSVG0(ICanvasContext ctx, Function1<Set<?>, Map<?, ?>> mappingFunction) {
+       private static String renderSVG0(double width, double height, ICanvasContext ctx, Function1<Set<?>, Map<?, ?>> mappingFunction) {
 
                // Get a DOMImplementation.
                DOMImplementation domImpl = GenericDOMImplementation.getDOMImplementation();
@@ -642,48 +641,26 @@ public class SCLScenegraph {
                        RTreeNode rtree = NodeUtil.getNearestChildByClass(root, RTreeNode.class);
                        Rectangle2D rtreeBounds = NodeUtil.getLocalBounds(rtree);
 
-                       // nav is a node that has zooming functionalities
-                       NavigationNode nav = NodeUtil.getNearestChildByClass(root, NavigationNode.class);
-                       nav.setZoomEnabled(true);
-
-                       // fit view with the contents of rtreeBounds
-                       nav.zoomTo(rtreeBounds);
-
                        // get the bounds of the content
-                       Rectangle2D content = NodeUtil.getLocalBounds(nav);
-
-                       svgGenerator.scale(3,3);
-
+                       Rectangle2D content = rtreeBounds;
+                       
+                       // To account for dynamic padding of selection rectangles (5 units + stroke width)
+                       int offset = 6;
+                       
+                       double scale = width < 0 || height < 0 ? 1.0 : Math.min((width - 2*offset) / content.getWidth(), (height - 2*offset) / content.getHeight());
+               
+                       svgGenerator.translate(offset, offset);
+                       svgGenerator.scale(scale, scale);
                        // translate svgGenerator to the x and y coordinates of current content
-                       svgGenerator.translate(-1 * content.getX(), (-1 * content.getY()));
-
-                       Rectangle2D destination = new Rectangle2D.Double(0,0,1000,1000);
-                       double sx = destination.getWidth() / content.getWidth();
-                       double sy = destination.getHeight() / content.getHeight();
-                       double scale = sx < sy ? sx : sy;
+                       svgGenerator.translate(-content.getX(), -content.getY());
 
-                       // Set svgCanvasSize to the given size parameters
-                       svgGenerator.setSVGCanvasSize(new Dimension((int)(scale * content.getWidth()), (int)(scale * content.getHeight())));
-                       svgGenerator.setClip(content);
-
-                       double trX = -1 * content.getX();
-                       double trY = -1 * content.getY();
-                       
-                       // NaNs
-                       if(!Double.isFinite(trX)) trX = 0;
-                       if(!Double.isFinite(trY)) trY = 0;
+                       svgGenerator.setSVGCanvasSize(new Dimension((int)Math.ceil(scale * content.getWidth()) + 2*offset, (int)Math.ceil(scale * content.getHeight()) + 2*offset));
+                       //svgGenerator.setClip(content);
                        
                        result.append(MAIN_SECTION, "<g class=\"symbols\">");
                        result.append(SELECTION_SECTION, "<g class=\"selections\">");
                        result.append(SELECTION_MASK_SECTION, "<g class=\"selectionMasks\">");
 
-                       result.append(ALL_SECTIONS, "<g transform=\"translate(");
-                       result.append(ALL_SECTIONS, "" + trX);
-                       result.append(ALL_SECTIONS, ", ");
-                       result.append(ALL_SECTIONS, "" + trY);
-                       result.append(ALL_SECTIONS, ")\">");
-
-                       
                        KeyVisitor keyVisitor = new KeyVisitor();
                        sg.accept(keyVisitor);
                        
@@ -691,7 +668,7 @@ public class SCLScenegraph {
                        
                        Map<?, ?> mappings = mappingFunction.apply(keys);
 
-                       IG2DNodeVisitor visitor = new PrintingVisitor(result, mappings);
+                       IG2DNodeVisitor visitor = new PrintingVisitor(svgGenerator, result, mappings);
                        
                        sg.accept(visitor);
 
@@ -700,7 +677,7 @@ public class SCLScenegraph {
                }
 
 
-               result.append(ALL_SECTIONS, "</g></g>");
+               result.append(ALL_SECTIONS, "</g>");
 
                StringBuilder res = new StringBuilder();
                res.append("<svg width=\"100%\" height=\"100%\" stroke=\"black\">");
@@ -749,12 +726,14 @@ public class SCLScenegraph {
         HashMap<SingleElementNode,RenderSVGContext> senBuilders = new HashMap<>();
 
         private RenderSVGContext result;
+        private SVGGraphics2D svgGenerator;
 
         private Map<?, ?> mappings;
 
-        public PrintingVisitor(RenderSVGContext result, Map<?, ?> mappings) {
+        public PrintingVisitor(SVGGraphics2D svgGenerator, RenderSVGContext result, Map<?, ?> mappings) {
             this.result = result;
             this.mappings = mappings;
+            this.svgGenerator = svgGenerator;
         }
 
         private String getKey(SingleElementNode node) {
@@ -787,7 +766,7 @@ public class SCLScenegraph {
                 parentBuilder.append(SELECTION_SECTION, "\n<g style=\"visibility:hidden\" class=\"selection\" id=\"" + key + "\">");
                 parentBuilder.append(SELECTION_MASK_SECTION, "\n<g class=\"selectionMask\" opacity=\"0.001\" id=\"" + key + "\">");
                 
-                Element doc = renderSVGNode((IG2DNode)node);
+                Element doc = renderSVGNode(svgGenerator, (IG2DNode)node);
                 String svg = printSVGDocument(doc);
                 parentBuilder.append(MAIN_SECTION, svg);
 
@@ -795,7 +774,7 @@ public class SCLScenegraph {
                     n.setIgnoreSelection(false);
                 }
 
-                doc = renderSVGNode((IG2DNode)node);
+                doc = renderSVGNode(svgGenerator, (IG2DNode)node);
                 svg = printSVGDocument(doc);
                 parentBuilder.append(SELECTION_SECTION, svg);
 
@@ -805,7 +784,7 @@ public class SCLScenegraph {
                     n.setDynamicStroke(bs);
                 }
 
-                doc = renderSVGNode((IG2DNode)node);
+                doc = renderSVGNode(svgGenerator, (IG2DNode)node);
                 svg = printSVGDocument(doc);
                 parentBuilder.append(SELECTION_MASK_SECTION, svg);
 
@@ -823,13 +802,17 @@ public class SCLScenegraph {
                     
                     String key = getKey(parentSEN);
                     n.setIgnore(false);
-                    Element doc = renderSVGNode((IG2DNode)node);
+                    Element doc = renderSVGNode(svgGenerator, (IG2DNode)node);
                     n.setIgnore(true);
                     String svg = printSVGDocument(doc);
                     parentBuilder2.append(SELECTION_SECTION, "\n<g style=\"visibility:hidden\" class=\"selection\" id=\"" + key + "\">");
                     parentBuilder2.append(SELECTION_SECTION, svg);
                     parentBuilder2.append(SELECTION_SECTION, "\n</g>");
-                    parentBuilder2.append(SELECTION_MASK_SECTION, "\n<g class=\"selectionMask\" id=\"" + key + "\">");
+                    AffineTransform transform = svgGenerator.getTransform();
+                    double[] matrix = new double[6];
+                    transform.getMatrix(matrix);
+                    String matrixString = String.format("matrix(%f,%f,%f,%f,%f,%f)", matrix[0], matrix[1], matrix[2], matrix[3], matrix[4], matrix[5]);
+                    parentBuilder2.append(SELECTION_MASK_SECTION, "\n<g class=\"selectionMask\" id=\"" + key + "\" transform=\"" + matrixString + "\">");
                     Rectangle2D rect = n.getRect();
                     // NaN
                     if(rect.getHeight() == rect.getHeight() && rect.getWidth() == rect.getWidth()) {
@@ -900,12 +883,16 @@ public class SCLScenegraph {
                        RenderSVGContext b = senBuilders.get(sen);
                        String content = b.get(MAIN_SECTION);
                        if(content.isEmpty()) {
-                               for(SelectionNode n : NodeUtil.collectNodes(node, SelectionNode.class)) {
-                                       n.setIgnore(true);
+                               if(sen.getKey() != null) {
+
+                                       for(SelectionNode n : NodeUtil.collectNodes(node, SelectionNode.class)) {
+                                               n.setIgnore(true);
+                                       }
+
+                                       Element doc = renderSVGNode(svgGenerator, (IG2DNode)node);
+                                       String svg = printSVGDocument(doc);
+                                       parentBuilder.append(MAIN_SECTION, svg);
                                }
-                               Element doc = renderSVGNode((IG2DNode)node);
-                               String svg = printSVGDocument(doc);
-                               parentBuilder.append(MAIN_SECTION, svg);
                        } else {
                                parentBuilder.append(b);
                        }