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1
18 package org.apache.batik.dom.svg;
19
20 import java.awt.geom.Point2D  ;
21 import java.awt.geom.Rectangle2D ;
22
23 import org.w3c.dom.DOMException ;
24 import org.w3c.dom.Element ;
25 import org.w3c.dom.svg.SVGMatrix;
26 import org.w3c.dom.svg.SVGPoint;
27 import org.w3c.dom.svg.SVGRect;
28
29
35 public class SVGTextContentSupport
36 {
37
38
42 public static int getNumberOfChars(Element elt)
43 {
44 final SVGOMElement svgelt = (SVGOMElement)elt;
45
46 return (((SVGTextContent)svgelt.getSVGContext()).getNumberOfChars());
47 }
48
49
50
54 public static SVGRect getExtentOfChar(Element elt, final int charnum ) {
55 final SVGOMElement svgelt = (SVGOMElement)elt;
56
57 if ( (charnum < 0) ||
58 (charnum >= getNumberOfChars(elt)) ){
59 throw svgelt.createDOMException
60 (DOMException.INDEX_SIZE_ERR,
61 "",null);
62 }
63
64 final SVGTextContent context = (SVGTextContent)svgelt.getSVGContext();
65 Rectangle2D r2d = getExtent(svgelt, context, charnum);
66
67 return new SVGRect() {
68 public float getX() {
69 return (float)SVGTextContentSupport.getExtent
70 (svgelt, context, charnum).getX();
71 }
72 public void setX(float x) throws DOMException {
73 throw svgelt.createDOMException
74 (DOMException.NO_MODIFICATION_ALLOWED_ERR,
75 "readonly.rect", null);
76 }
77
78 public float getY() {
79 return (float)SVGTextContentSupport.getExtent
80 (svgelt, context, charnum).getY();
81 }
82 public void setY(float y) throws DOMException {
83 throw svgelt.createDOMException
84 (DOMException.NO_MODIFICATION_ALLOWED_ERR,
85 "readonly.rect", null);
86 }
87
88 public float getWidth() {
89 return (float)SVGTextContentSupport.getExtent
90 (svgelt, context, charnum).getWidth();
91 }
92 public void setWidth(float width) throws DOMException {
93 throw svgelt.createDOMException
94 (DOMException.NO_MODIFICATION_ALLOWED_ERR,
95 "readonly.rect", null);
96 }
97
98 public float getHeight() {
99 return (float)SVGTextContentSupport.getExtent
100 (svgelt, context, charnum).getHeight();
101 }
102 public void setHeight(float height) throws DOMException {
103 throw svgelt.createDOMException
104 (DOMException.NO_MODIFICATION_ALLOWED_ERR,
105 "readonly.rect", null);
106 }
107 };
108 }
109
110 protected static Rectangle2D getExtent
111 (SVGOMElement svgelt, SVGTextContent context, int charnum) {
112 Rectangle2D r2d = context.getExtentOfChar(charnum);
113 if (r2d == null) throw svgelt.createDOMException
114 (DOMException.INDEX_SIZE_ERR, "",null);
115 return r2d;
116 }
117
118
122 public static SVGPoint getStartPositionOfChar
123 (Element elt, final int charnum) throws DOMException {
124
125 final SVGOMElement svgelt = (SVGOMElement)elt;
126
127 if ( (charnum < 0) ||
128 (charnum >= getNumberOfChars(elt)) ){
129 throw svgelt.createDOMException
130 (DOMException.INDEX_SIZE_ERR,
131 "",null);
132 }
133
134 final SVGTextContent context = (SVGTextContent)svgelt.getSVGContext();
135 Point2D p2d = getStartPos(svgelt, context, charnum);
136
137 return new SVGTextPoint(svgelt){
138 public float getX(){
139 return (float)SVGTextContentSupport.getStartPos
140 (this.svgelt, context, charnum).getX();
141 }
142 public float getY(){
143 return (float)SVGTextContentSupport.getStartPos
144 (this.svgelt, context, charnum).getY();
145 }
146 };
147 }
148
149 protected static Point2D getStartPos
150 (SVGOMElement svgelt, SVGTextContent context, int charnum) {
151 Point2D p2d = context.getStartPositionOfChar(charnum);
152 if (p2d == null) throw svgelt.createDOMException
153 (DOMException.INDEX_SIZE_ERR, "",null);
154 return p2d;
155 }
156
157
161 public static SVGPoint getEndPositionOfChar
162 (Element elt,final int charnum) throws DOMException {
163
164 final SVGOMElement svgelt = (SVGOMElement)elt;
165
166 if ( (charnum < 0) ||
167 (charnum >= getNumberOfChars(elt)) ){
168 throw svgelt.createDOMException
169 (DOMException.INDEX_SIZE_ERR,
170 "",null);
171 }
172
173 final SVGTextContent context = (SVGTextContent)svgelt.getSVGContext();
174 Point2D p2d = getEndPos(svgelt, context, charnum);
175
176 return new SVGTextPoint(svgelt){
177 public float getX(){
178 return (float)SVGTextContentSupport.getEndPos
179 (this.svgelt, context, charnum).getX();
180 }
181 public float getY(){
182 return (float)SVGTextContentSupport.getEndPos
183 (this.svgelt, context, charnum).getY();
184 }
185 };
186 }
187
188 protected static Point2D getEndPos
189 (SVGOMElement svgelt, SVGTextContent context, int charnum) {
190 Point2D p2d = context.getEndPositionOfChar(charnum);
191 if (p2d == null) throw svgelt.createDOMException
192 (DOMException.INDEX_SIZE_ERR, "",null);
193 return p2d;
194 }
195
196
200 public static void selectSubString(Element elt, int charnum, int nchars){
201
202 final SVGOMElement svgelt = (SVGOMElement)elt;
203
204 if ( (charnum < 0) ||
205 (charnum >= getNumberOfChars(elt)) ){
206 throw svgelt.createDOMException
207 (DOMException.INDEX_SIZE_ERR,
208 "",null);
209 }
210
211 final SVGTextContent context = (SVGTextContent)svgelt.getSVGContext();
212
213 context.selectSubString(charnum, nchars);
214 }
215
216
220 public static float getRotationOfChar(Element elt, final int charnum ) {
221 final SVGOMElement svgelt = (SVGOMElement)elt;
222
223 if ( (charnum < 0) ||
224 (charnum >= getNumberOfChars(elt)) ){
225 throw svgelt.createDOMException
226 (DOMException.INDEX_SIZE_ERR,
227 "",null);
228 }
229
230 final SVGTextContent context = (SVGTextContent)svgelt.getSVGContext();
231
232 return context.getRotationOfChar(charnum);
233 }
234
235
239 public static float getComputedTextLength(Element elt){
240
241 final SVGOMElement svgelt = (SVGOMElement)elt;
242
243 final SVGTextContent context = (SVGTextContent)svgelt.getSVGContext();
244
245 return context.getComputedTextLength();
246 }
247
248
252 public static float getSubStringLength(Element elt, int charnum, int nchars){
253
254 final SVGOMElement svgelt = (SVGOMElement)elt;
255
256 if ( (charnum < 0) ||
257 (charnum >= getNumberOfChars(elt)) ){
258 throw svgelt.createDOMException
259 (DOMException.INDEX_SIZE_ERR,
260 "",null);
261 }
262
263 final SVGTextContent context = (SVGTextContent)svgelt.getSVGContext();
264
265 return context.getSubStringLength(charnum,nchars);
266 }
267
268
272 public static int getCharNumAtPosition(Element elt, final float x, final float y) throws DOMException {
273
274 final SVGOMElement svgelt = (SVGOMElement)elt;
275
276 final SVGTextContent context = (SVGTextContent)svgelt.getSVGContext();
277
278 return context.getCharNumAtPosition(x,y);
279 }
280
281 public static class SVGTextPoint extends SVGOMPoint {
282 SVGOMElement svgelt;
283 SVGTextPoint(SVGOMElement elem) {
284 svgelt = elem;
285 }
286 public void setX(float x) throws DOMException {
287 throw svgelt.createDOMException
288 (DOMException.NO_MODIFICATION_ALLOWED_ERR,
289 "readonly.point", null);
290 }
291 public void setY(float y) throws DOMException {
292 throw svgelt.createDOMException
293 (DOMException.NO_MODIFICATION_ALLOWED_ERR,
294 "readonly.point", null);
295 }
296 }
297
298 }
299 |
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