| 1 | package cadastre_fr;
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| 2 |
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| 3 | import java.util.ArrayList;
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| 4 |
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| 5 | /**
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| 6 | * This class is not intended to be a real SVG parser. It's also not using existing
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| 7 | * xml parsers. It's just extracting the required strings from an SVG file coming
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| 8 | * from the French land registry cadastre.gouv.fr
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| 9 | *
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| 10 | */
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| 11 | public class SVGParser {
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| 12 |
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| 13 | private String cViewBoxStart = "viewBox=\"";
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| 14 | private String cViewBoxEnd = "\"";
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| 15 | private String cPathStart = "<path d=\"";
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| 16 | private String cClosedPathEnd = "\"/>";
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| 17 |
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| 18 | /**
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| 19 | * The SVG viewBox looks like this:
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| 20 | * viewBox="969780.0 320377.11 5466.130000000005 2846.429999999993"
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| 21 | * @param svg the SVG XML data
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| 22 | * @return double [x,y,dx,dy] of viewBox; null if parsing failed
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| 23 | */
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| 24 | public double[] getViewBox(String svg) {
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| 25 | int s = svg.indexOf(cViewBoxStart)+cViewBoxStart.length();
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| 26 | int e = svg.indexOf(cViewBoxEnd, s);
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| 27 | if (s != -1 && e != -1) {
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| 28 | try {
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| 29 | String str = svg.substring(s, e);
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| 30 | String [] viewBox = str.split(" ");
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| 31 | double[] dbox = new double[4];
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| 32 | for (int i = 0; i<4; i++)
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| 33 | dbox[i] = Double.parseDouble(viewBox[i]);
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| 34 | return dbox;
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| 35 | } catch (Exception ex) {
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| 36 | return null;
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| 37 | }
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| 38 | }
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| 39 | return null;
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| 40 | }
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| 41 |
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| 42 | /**
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| 43 | * Closed SVG paths are finishing with a "Z" at the end of the moves list.
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| 44 | * @param svg
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| 45 | * @return
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| 46 | */
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| 47 | public String [] getClosedPaths(String svg) {
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| 48 | ArrayList<String> path = new ArrayList<String>();
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| 49 | int i = 0;
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| 50 | while (svg.indexOf(cPathStart, i) != -1) {
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| 51 | int s = svg.indexOf(cPathStart, i) + cViewBoxStart.length();
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| 52 | int e = svg.indexOf(cClosedPathEnd, s);
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| 53 | if (s != -1 && e != -1) {
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| 54 | String onePath = svg.substring(s, e);
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| 55 | if (onePath.indexOf("Z") != -1) // only closed SVG path
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| 56 | path.add(onePath);
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| 57 | } else
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| 58 | break;
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| 59 | i = e;
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| 60 | }
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| 61 | return path.toArray(new String[ path.size() ]);
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| 62 | }
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| 63 |
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| 64 | }
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