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1
18 package org.apache.batik.transcoder;
19
20 import java.awt.Dimension  ;
21 import java.awt.geom.AffineTransform ;
22 import java.awt.geom.Dimension2D ;
23 import java.awt.geom.Rectangle2D ;
24 import java.net.URL ;
25 import java.net.MalformedURLException ;
26 import java.util.StringTokenizer ;
27 import java.util.LinkedList ;
28 import java.util.List ;
29
30 import org.apache.batik.bridge.BaseScriptingEnvironment;
31 import org.apache.batik.bridge.BridgeContext;
32 import org.apache.batik.bridge.BridgeException;
33 import org.apache.batik.bridge.DefaultScriptSecurity;
34 import org.apache.batik.bridge.GVTBuilder;
35 import org.apache.batik.bridge.NoLoadScriptSecurity;
36 import org.apache.batik.bridge.RelaxedScriptSecurity;
37 import org.apache.batik.bridge.ScriptSecurity;
38 import org.apache.batik.bridge.UserAgent;
39 import org.apache.batik.bridge.UserAgentAdapter;
40 import org.apache.batik.bridge.ViewBox;
41 import org.apache.batik.dom.svg.SAXSVGDocumentFactory;
42 import org.apache.batik.dom.svg.SVGDOMImplementation;
43 import org.apache.batik.dom.svg.SVGOMDocument;
44 import org.apache.batik.dom.util.DocumentFactory;
45 import org.apache.batik.dom.util.DOMUtilities;
46 import org.apache.batik.gvt.CanvasGraphicsNode;
47 import org.apache.batik.gvt.CompositeGraphicsNode;
48 import org.apache.batik.gvt.GraphicsNode;
49 import org.apache.batik.transcoder.keys.BooleanKey;
50 import org.apache.batik.transcoder.keys.FloatKey;
51 import org.apache.batik.transcoder.keys.LengthKey;
52 import org.apache.batik.transcoder.keys.Rectangle2DKey;
53 import org.apache.batik.transcoder.keys.StringKey;
54 import org.apache.batik.util.ParsedURL;
55 import org.apache.batik.util.SVGConstants;
56 import org.w3c.dom.DOMImplementation ;
57 import org.w3c.dom.Document ;
58 import org.w3c.dom.svg.SVGSVGElement;
59
60
61
74 public abstract class SVGAbstractTranscoder extends XMLAbstractTranscoder {
75
78 public static final String DEFAULT_DEFAULT_FONT_FAMILY
79 = "Arial, Helvetica, sans-serif";
80
81
84 protected Rectangle2D curAOI;
85
86
89 protected AffineTransform curTxf;
90
91
95 protected GraphicsNode root;
96
97
100 protected BridgeContext ctx;
101
102
105 protected GVTBuilder builder;
106
107
110 protected float width=400, height=400;
111
112
113 protected UserAgent userAgent;
114
115 protected SVGAbstractTranscoder() {
116 userAgent = createUserAgent();
117
118 hints.put(KEY_DOCUMENT_ELEMENT_NAMESPACE_URI,
119 SVGConstants.SVG_NAMESPACE_URI);
120 hints.put(KEY_DOCUMENT_ELEMENT,
121 SVGConstants.SVG_SVG_TAG);
122 hints.put(KEY_DOM_IMPLEMENTATION,
123 SVGDOMImplementation.getDOMImplementation());
124 hints.put(KEY_MEDIA,
125 "screen");
126 hints.put(KEY_DEFAULT_FONT_FAMILY,
127 DEFAULT_DEFAULT_FONT_FAMILY);
128 hints.put(KEY_EXECUTE_ONLOAD,
129 Boolean.FALSE);
130 hints.put(KEY_ALLOWED_SCRIPT_TYPES,
131 DEFAULT_ALLOWED_SCRIPT_TYPES);
132 }
133
134
135 protected UserAgent createUserAgent() {
136 return new SVGAbstractTranscoderUserAgent();
137 }
138
139
147 protected DocumentFactory createDocumentFactory(DOMImplementation domImpl,
148 String parserClassname) {
149 return new SAXSVGDocumentFactory(parserClassname);
150 }
151
152 public void transcode(TranscoderInput input, TranscoderOutput output)
153 throws TranscoderException {
154
155 super.transcode(input, output);
156
157 if (ctx != null)
158 ctx.dispose();
159 }
160
168 protected void transcode(Document document,
169 String uri,
170 TranscoderOutput output)
171 throws TranscoderException {
172
173 if ((document != null) &&
174 !(document.getImplementation() instanceof SVGDOMImplementation)) {
175 DOMImplementation impl;
176 impl = (DOMImplementation)hints.get(KEY_DOM_IMPLEMENTATION);
177 document = DOMUtilities.deepCloneDocument(document, impl);
179 if (uri != null) {
180 try {
181 URL url = new URL (uri);
182 ((SVGOMDocument)document).setURLObject(url);
183 } catch (MalformedURLException mue) {
184 }
185 }
186 }
187
188 ctx = createBridgeContext();
189 SVGOMDocument svgDoc = (SVGOMDocument)document;
190 SVGSVGElement root = svgDoc.getRootElement();
191
192 builder = new GVTBuilder();
194 boolean isDynamic =
196 (hints.containsKey(KEY_EXECUTE_ONLOAD) &&
197 ((Boolean )hints.get(KEY_EXECUTE_ONLOAD)).booleanValue() &&
198 ctx.isDynamicDocument(svgDoc));
199
200 GraphicsNode gvtRoot;
201 try {
202 if (isDynamic)
203 ctx.setDynamicState(BridgeContext.DYNAMIC);
204
205 gvtRoot = builder.build(ctx, svgDoc);
206
207 if (ctx.isDynamic()) {
209 BaseScriptingEnvironment se;
210 se = new BaseScriptingEnvironment(ctx);
211 se.loadScripts();
212 se.dispatchSVGLoadEvent();
213 }
214 } catch (BridgeException ex) {
215 throw new TranscoderException(ex);
216 }
217
218 float docWidth = (float)ctx.getDocumentSize().getWidth();
220 float docHeight = (float)ctx.getDocumentSize().getHeight();
221
222 setImageSize(docWidth, docHeight);
223
224 AffineTransform Px;
226
227 if (hints.containsKey(KEY_AOI)) {
229 Rectangle2D aoi = (Rectangle2D )hints.get(KEY_AOI);
230 Px = new AffineTransform ();
232 double sx = width / aoi.getWidth();
233 double sy = height / aoi.getHeight();
234 double scale = Math.min(sx,sy);
235 Px.scale(scale, scale);
236 double tx = -aoi.getX() + (width/scale - aoi.getWidth())/2;
237 double ty = -aoi.getY() + (height/scale -aoi.getHeight())/2;;
238 Px.translate(tx, ty);
239 curAOI = aoi;
242 } else {
243 String ref = new ParsedURL(uri).getRef();
244
245 try {
246 Px = ViewBox.getViewTransform(ref, root, width, height);
247 } catch (BridgeException ex) {
248 throw new TranscoderException(ex);
249 }
250
251 if (Px.isIdentity() &&
252 (width != docWidth || height != docHeight)) {
253 float xscale, yscale;
256 xscale = width/docWidth;
257 yscale = height/docHeight;
258 float scale = Math.min(xscale,yscale);
259 Px = AffineTransform.getScaleInstance(scale, scale);
260 }
261
262 curAOI = new Rectangle2D.Float (0, 0, width, height);
263 }
264
265 CanvasGraphicsNode cgn = getCanvasGraphicsNode(gvtRoot);
266 if (cgn != null) {
267 cgn.setViewingTransform(Px);
268 curTxf = new AffineTransform ();
269 } else {
270 curTxf = Px;
271 }
272
273 this.root = gvtRoot;
274 }
275
276 protected CanvasGraphicsNode getCanvasGraphicsNode(GraphicsNode gn) {
277 if (!(gn instanceof CompositeGraphicsNode))
278 return null;
279 CompositeGraphicsNode cgn = (CompositeGraphicsNode)gn;
280 List children = cgn.getChildren();
281 if (children.size() == 0)
282 return null;
283 gn = (GraphicsNode)children.get(0);
284 if (!(gn instanceof CanvasGraphicsNode))
285 return null;
286 return (CanvasGraphicsNode)gn;
287 }
288
289
294 protected BridgeContext createBridgeContext() {
295 return new BridgeContext(userAgent);
296 }
297
298
305 protected void setImageSize(float docWidth, float docHeight) {
306
307 float imgWidth = -1;
309 if (hints.containsKey(KEY_WIDTH)) {
310 imgWidth = ((Float )hints.get(KEY_WIDTH)).floatValue();
311 }
312 float imgHeight = -1;
313 if (hints.containsKey(KEY_HEIGHT)) {
314 imgHeight = ((Float )hints.get(KEY_HEIGHT)).floatValue();
315 }
316
317 if (imgWidth > 0 && imgHeight > 0) {
318 width = imgWidth;
319 height = imgHeight;
320 } else if (imgHeight > 0) {
321 width = (docWidth * imgHeight) / docHeight;
322 height = imgHeight;
323 } else if (imgWidth > 0) {
324 width = imgWidth;
325 height = (docHeight * imgWidth) / docWidth;
326 } else {
327 width = docWidth;
328 height = docHeight;
329 }
330
331 float imgMaxWidth = -1;
333 if (hints.containsKey(KEY_MAX_WIDTH)) {
334 imgMaxWidth = ((Float )hints.get(KEY_MAX_WIDTH)).floatValue();
335 }
336 float imgMaxHeight = -1;
337 if (hints.containsKey(KEY_MAX_HEIGHT)) {
338 imgMaxHeight = ((Float )hints.get(KEY_MAX_HEIGHT)).floatValue();
339 }
340
341 if ((imgMaxHeight > 0) && (height > imgMaxHeight)) {
342 width = (docWidth * imgMaxHeight) / docHeight;
343 height = imgMaxHeight;
344 }
345 if ((imgMaxWidth > 0) && (width > imgMaxWidth)) {
346 width = imgMaxWidth;
347 height = (docHeight * imgMaxWidth) / docWidth;
348 }
349 }
350
351
352
356
375 public static final TranscodingHints.Key KEY_WIDTH
376 = new LengthKey();
377
378
397 public static final TranscodingHints.Key KEY_HEIGHT
398 = new LengthKey();
399
400
423 public static final TranscodingHints.Key KEY_MAX_WIDTH
424 = new LengthKey();
425
426
449 public static final TranscodingHints.Key KEY_MAX_HEIGHT
450 = new LengthKey();
451
452
474 public static final TranscodingHints.Key KEY_AOI
475 = new Rectangle2DKey();
476
477
498 public static final TranscodingHints.Key KEY_LANGUAGE
499 = new StringKey();
500
501
522 public static final TranscodingHints.Key KEY_MEDIA
523 = new StringKey();
524
525
549 public static final TranscodingHints.Key KEY_DEFAULT_FONT_FAMILY
550 = new StringKey();
551
552
573 public static final TranscodingHints.Key KEY_ALTERNATE_STYLESHEET
574 = new StringKey();
575
576
596 public static final TranscodingHints.Key KEY_USER_STYLESHEET_URI
597 = new StringKey();
598
599
620 public static final TranscodingHints.Key KEY_PIXEL_UNIT_TO_MILLIMETER
621 = new FloatKey();
622
623
647 public static final TranscodingHints.Key KEY_PIXEL_TO_MM
648 = KEY_PIXEL_UNIT_TO_MILLIMETER;
649
650
671 public static final TranscodingHints.Key KEY_EXECUTE_ONLOAD
672 = new BooleanKey();
673
674
699 public static final TranscodingHints.Key KEY_ALLOWED_SCRIPT_TYPES
700 = new StringKey();
701
702
705 public static final String DEFAULT_ALLOWED_SCRIPT_TYPES
706 = SVGConstants.SVG_SCRIPT_TYPE_ECMASCRIPT + ", "
707 + SVGConstants.SVG_SCRIPT_TYPE_JAVA;
708
709
735 public static final TranscodingHints.Key KEY_CONSTRAIN_SCRIPT_ORIGIN
736 = new BooleanKey();
737
738
739
742 protected class SVGAbstractTranscoderUserAgent extends UserAgentAdapter {
743
746 protected List scripts;
747
748 public SVGAbstractTranscoderUserAgent() {
749 addStdFeatures();
750 }
751
752
755 public AffineTransform getTransform() {
756 return SVGAbstractTranscoder.this.curTxf;
757 }
758
759
762 public void setTransform(AffineTransform at) {
763 SVGAbstractTranscoder.this.curTxf = at;
764 }
765
766
769 public Dimension2D getViewportSize() {
770 return new Dimension ((int)SVGAbstractTranscoder.this.width,
771 (int)SVGAbstractTranscoder.this.height);
772 }
773
774
777 public void displayError(String message) {
778 try {
779 SVGAbstractTranscoder.this.handler.error
780 (new TranscoderException(message));
781 } catch (TranscoderException ex) {
782 throw new RuntimeException ();
783 }
784 }
785
786
789 public void displayError(Exception e) {
790 try {
791 e.printStackTrace();
792 SVGAbstractTranscoder.this.handler.error
793 (new TranscoderException(e));
794 } catch (TranscoderException ex) {
795 throw new RuntimeException ();
796 }
797 }
798
799
802 public void displayMessage(String message) {
803 try {
804 SVGAbstractTranscoder.this.handler.warning
805 (new TranscoderException(message));
806 } catch (TranscoderException ex) {
807 throw new RuntimeException ();
808 }
809 }
810
811
815 public float getPixelUnitToMillimeter() {
816 Object obj = SVGAbstractTranscoder.this.hints.get
817 (KEY_PIXEL_UNIT_TO_MILLIMETER);
818 if (obj != null) {
819 return ((Float )obj).floatValue();
820 }
821
822 return super.getPixelUnitToMillimeter();
823 }
824
825
829 public String getLanguages() {
830 if (SVGAbstractTranscoder.this.hints.containsKey(KEY_LANGUAGE)) {
831 return (String )SVGAbstractTranscoder.this.hints.get
832 (KEY_LANGUAGE);
833 }
834
835 return super.getLanguages();
836 }
837
838
841 public String getMedia() {
842 String s = (String )hints.get(KEY_MEDIA);
843 if (s != null) return s;
844
845 return super.getMedia();
846 }
847
848
851 public String getDefaultFontFamily() {
852 String s = (String )hints.get(KEY_DEFAULT_FONT_FAMILY);
853 if (s != null) return s;
854
855 return super.getDefaultFontFamily();
856 }
857
858
861 public String getAlternateStyleSheet() {
862 String s = (String )hints.get(KEY_ALTERNATE_STYLESHEET);
863 if (s != null)
864 return s;
865
866 return super.getAlternateStyleSheet();
867 }
868
869
873 public String getUserStyleSheetURI() {
874 String s = (String )SVGAbstractTranscoder.this.hints.get
875 (KEY_USER_STYLESHEET_URI);
876 if (s != null)
877 return s;
878
879 return super.getUserStyleSheetURI();
880 }
881
882
885 public String getXMLParserClassName() {
886 String s = (String )SVGAbstractTranscoder.this.hints.get
887 (KEY_XML_PARSER_CLASSNAME);
888 if (s != null)
889 return s;
890
891 return super.getXMLParserClassName();
892 }
893
894
898 public boolean isXMLParserValidating() {
899 Boolean b = (Boolean )SVGAbstractTranscoder.this.hints.get
900 (KEY_XML_PARSER_VALIDATING);
901 if (b != null)
902 return b.booleanValue();
903
904 return super.isXMLParserValidating();
905 }
906
907
920 public ScriptSecurity getScriptSecurity(String scriptType,
921 ParsedURL scriptPURL,
922 ParsedURL docPURL){
923 if (scripts == null){
924 computeAllowedScripts();
925 }
926
927 if (!scripts.contains(scriptType)) {
928 return new NoLoadScriptSecurity(scriptType);
929 }
930
931
932 boolean constrainOrigin = true;
933
934 if (SVGAbstractTranscoder.this.hints.containsKey
935 (KEY_CONSTRAIN_SCRIPT_ORIGIN)) {
936 constrainOrigin =
937 ((Boolean )SVGAbstractTranscoder.this.hints.get
938 (KEY_CONSTRAIN_SCRIPT_ORIGIN)).booleanValue();
939 }
940
941 if (constrainOrigin) {
942 return new DefaultScriptSecurity
943 (scriptType,scriptPURL,docPURL);
944 } else {
945 return new RelaxedScriptSecurity
946 (scriptType,scriptPURL,docPURL);
947 }
948 }
949
950
954 protected void computeAllowedScripts(){
955 scripts = new LinkedList ();
956 if (!SVGAbstractTranscoder.this.hints.containsKey
957 (KEY_ALLOWED_SCRIPT_TYPES)) {
958 return;
959 }
960
961 String allowedScripts
962 = (String )SVGAbstractTranscoder.this.hints.get
963 (KEY_ALLOWED_SCRIPT_TYPES);
964
965 StringTokenizer st = new StringTokenizer (allowedScripts, ",");
966 while (st.hasMoreTokens()) {
967 scripts.add(st.nextToken());
968 }
969 }
970
971 }
972 }
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