Java tutorial
/* * Copyright (C) 2014 Alec Dhuse * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package co.foldingmap.mapImportExport; import co.foldingmap.Logger; import co.foldingmap.map.vector.MultiGeometry; import co.foldingmap.map.vector.LatLonAltBox; import co.foldingmap.map.vector.VectorLayer; import co.foldingmap.map.vector.CoordinateList; import co.foldingmap.map.vector.VectorObjectList; import co.foldingmap.map.vector.VectorObject; import co.foldingmap.map.vector.Coordinate; import co.foldingmap.map.vector.MapPoint; import co.foldingmap.map.vector.LineString; import co.foldingmap.map.vector.Polygon; import co.foldingmap.map.themes.PolygonStyle; import co.foldingmap.map.themes.MapTheme; import co.foldingmap.map.themes.ColorStyle; import co.foldingmap.map.themes.IconStyle; import co.foldingmap.map.themes.LineStyle; import co.foldingmap.map.labeling.PointLabel; import co.foldingmap.map.labeling.MapLabel; import co.foldingmap.map.labeling.LineStringLabel; import co.foldingmap.map.labeling.PolygonLabel; import co.foldingmap.map.labeling.LabelManager; import co.foldingmap.map.DigitalMap; import co.foldingmap.map.Layer; import co.foldingmap.map.MapView; import java.awt.Color; import java.awt.Font; import java.awt.geom.Point2D; import java.awt.image.BufferedImage; import java.io.*; import javax.imageio.ImageIO; import javax.swing.ImageIcon; import org.apache.commons.codec.binary.Base64; /** * * @author Alec */ public class SvgExporter { private int indentCount; public SvgExporter() { indentCount = 0; } /** Adds an Indent to the indent counter. * This counter is used to properly indent XML tags for easy reading in * the exported SVG file. */ private void addIndent() { indentCount++; } private void exportLayer(BufferedWriter outputStream, Layer layer, MapTheme theme, float maxY) { if (layer instanceof VectorLayer) { exportVectorLayer(outputStream, (VectorLayer) layer, theme, maxY); } else { Logger.log(Logger.ERR, "Export of layers other than VectorLayer not supported at this time."); } } private void exportVectorLayer(BufferedWriter outputStream, VectorLayer layer, MapTheme theme, float maxY) { VectorObjectList<VectorObject> lineStrings; try { outputStream.write(getIndent()); outputStream.write("<g\n"); addIndent(); outputStream.write(getIndent()); outputStream.write("id=\""); outputStream.write(layer.getName()); outputStream.write("\">\n\n"); removeIndent(); //Get a list of all LineStrings including those in MultiGeometries lineStrings = new VectorObjectList<VectorObject>(); lineStrings.addAll(layer.getObjectList().getLineStrings()); for (VectorObject object : layer.getObjectList().getMultiGeometries()) lineStrings.addAll(((MultiGeometry) object).getComponentObjects().getLineStrings()); //Draw LineString outlines first for (VectorObject object : lineStrings) { ColorStyle style = theme.getStyle(object.getObjectClass()); writeSvgLine(outputStream, object.getName(), object.getCoordinateList(), style, true); } for (VectorObject object : layer.getObjectList()) exportVectorObject(outputStream, object, theme, maxY); outputStream.write("</g>\n"); removeIndent(); } catch (Exception e) { Logger.log(Logger.ERR, "Error in SvgExporter.exportVectorLayer(ObjectOutputStream, VectorLayer, MapTheme) - " + e); } } public void exportVectorObject(BufferedWriter outputStream, VectorObject object, MapTheme theme, float maxY) { ColorStyle style; style = theme.getStyle(object.getObjectClass()); if (object instanceof Polygon) { writePath(outputStream, object.getName(), object.getCoordinateList(), style, true); } else if (object instanceof MapPoint) { writeImage(outputStream, (IconStyle) style, object.getCoordinateList().get(0), object.getName()); } else if (object instanceof LineString) { writeSvgLine(outputStream, object.getName(), object.getCoordinateList(), style, false); } else if (object instanceof MultiGeometry) { try { outputStream.write(getIndent()); outputStream.write("<g id=\""); outputStream.write(object.getName()); outputStream.write("\">\n\n"); addIndent(); for (VectorObject subObject : ((MultiGeometry) object).getComponentObjects()) exportVectorObject(outputStream, subObject, theme, maxY); removeIndent(); outputStream.write(getIndent()); outputStream.write("</g>\n"); } catch (Exception e) { Logger.log(Logger.ERR, "Error in SvgExporter.exportVectorObject() while exporting MultiGeometry: " + e); } } else { writePath(outputStream, object.getName(), object.getCoordinateList(), style, false); } } private void exportMapLabel(BufferedWriter outputStream, MapLabel label) { Color outlineColor, fillColor; float x, y; Font labelFont; String style, fontStyle; try { labelFont = label.getFont(); //construct style if (label.getFillColor() != null) { fillColor = label.getFillColor(); } else { fillColor = Color.BLACK; } if (label.getOutlineColor() != null) { outlineColor = label.getOutlineColor(); } else { outlineColor = Color.WHITE; } if (labelFont.getStyle() == Font.BOLD) { fontStyle = "font-weight=\"bold\""; } else if (labelFont.getStyle() == Font.PLAIN) { fontStyle = "font-style=\"normal\""; } else if (labelFont.getStyle() == Font.ITALIC) { fontStyle = "font-style=\"italic\""; } else { fontStyle = ""; } style = "font-family=\"" + labelFont.getFamily() + "\" font-size=\"" + labelFont.getSize() + "\" " + fontStyle + " "; outputStream.write(getIndent()); outputStream.write("<g " + style + ">\n"); addIndent(); style = "fill:#" + getHexColor(fillColor) + ";stroke:#" + getHexColor(outlineColor); if (label instanceof PointLabel) { PointLabel pointLabel = (PointLabel) label; x = pointLabel.getLine1StartPoint().x; y = pointLabel.getLine1StartPoint().y; outputStream.write(getIndent()); outputStream.write("<text x=\""); outputStream.write(Float.toString(x)); outputStream.write("\" y=\""); outputStream.write(Float.toString(y)); outputStream.write("\" style=\""); outputStream.write(style); outputStream.write("\">\n"); addIndent(); outputStream.write(getIndent()); outputStream.write("<tspan x=\""); outputStream.write(Float.toString(x)); outputStream.write("\" y=\""); outputStream.write(Float.toString(y)); outputStream.write("\">"); outputStream.write(pointLabel.getLine1Text()); outputStream.write("</tspan>\n"); if (pointLabel.getLine2Text() != null && pointLabel.getLine2Text().length() > 0) { x = pointLabel.getLine2StartPoint().x; y = pointLabel.getLine2StartPoint().y; if (x != 0 && y != 0) { outputStream.write(getIndent()); outputStream.write("<tspan x=\""); outputStream.write(Float.toString(x)); outputStream.write("\" y=\""); outputStream.write(Float.toString(y)); outputStream.write("\">"); outputStream.write(pointLabel.getLine2Text()); outputStream.write("</tspan>\n"); } } removeIndent(); outputStream.write(getIndent()); outputStream.write("</text>\n"); removeIndent(); outputStream.write(getIndent()); outputStream.write("</g>\n"); } else if (label instanceof LineStringLabel) { LineStringLabel lineLabel = (LineStringLabel) label; } else if (label instanceof PolygonLabel) { PolygonLabel polyLabel = (PolygonLabel) label; } } catch (Exception e) { Logger.log(Logger.ERR, "Error in SvgExporter.exportMapLabel(BufferedWriter, MapLabel) - " + e); } } public void exportMap(DigitalMap mapData, File outputFile) { BufferedWriter outputStream; float height, width, maxX; LabelManager labelManager; LatLonAltBox mapBounds; Layer currentLayer; MapView mapView; try { height = 600; width = 1200; mapView = mapData.getLastMapView(); mapBounds = mapData.getBoundary(); outputStream = new BufferedWriter(new FileWriter(outputFile)); labelManager = mapView.getLabelManager(); //mapView.getMapProjection().setReference(new Coordinate(0, 90, -180)); mapData.calculateCoordinateLocations(mapView); height = mapView.getY(mapBounds.getSouthWestCoordinate()); maxX = mapView.getX(mapBounds.getNorthEastCoordinate(), MapView.NO_WRAP); outputStream.write("<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n"); outputStream.write("<!-- Created with FoldingMap (http://www.foldingmap.co/) -->\n\n"); outputStream.write("<svg\n"); addIndent(); outputStream.write(getIndent()); outputStream.write("xmlns:dc=\"http://purl.org/dc/elements/1.1/\"\n"); outputStream.write(getIndent()); outputStream.write("xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\"\n"); outputStream.write(getIndent()); outputStream.write("xmlns:svg=\"http://www.w3.org/2000/svg\"\n"); outputStream.write(getIndent()); outputStream.write("xmlns:xlink=\"http://www.w3.org/1999/xlink\"\n"); outputStream.write(getIndent()); outputStream.write("xmlns=\"http://www.w3.org/2000/svg\"\n"); //height and width outputStream.write(getIndent()); outputStream.write("width=\""); outputStream.write(Float.toString(width)); outputStream.write("\"\n"); outputStream.write(getIndent()); outputStream.write("height=\""); outputStream.write(Float.toString(height)); outputStream.write("\"\n"); outputStream.write(getIndent()); outputStream.write("id=\""); outputStream.write(mapData.getName()); outputStream.write("\">\n\n"); //loop backwards through the layers, since the first layer is on the bottom. for (int i = mapData.getLayers().size() - 1; i >= 0; i--) { currentLayer = mapData.getLayer(i); exportLayer(outputStream, currentLayer, mapData.getTheme(), height); } //write Labels for (MapLabel label : labelManager.getLabels()) { exportMapLabel(outputStream, label); } removeIndent(); outputStream.write("</svg>"); outputStream.close(); } catch (Exception e) { Logger.log(Logger.ERR, "Error in SvgExporter.exportMap(DigitalMap) - " + e); } } /** * Generates the SVG style string from a given ColorStyle * * @param style * @return */ private String generateLineStyleString(ColorStyle style, boolean isOutline) { Color strokeColor; float width; LineStyle lineStyle; StringBuilder sb; lineStyle = (LineStyle) style; sb = new StringBuilder(); width = lineStyle.getLineWidth(); if (isOutline) { width += 1.2f; strokeColor = lineStyle.getOutlineColor(); } else { strokeColor = lineStyle.getFillColor(); } sb.append("fill-opacity:0;"); sb.append("stroke:#"); sb.append(getHexColor(strokeColor)); sb.append(";"); sb.append("stroke-width:"); sb.append(Float.toString(width)); sb.append(";"); sb.append("stroke-linecap:round;"); return sb.toString(); } /** * Generates the SVG style string from a given ColorStyle * * @param style * @return */ private String generateStyleString(ColorStyle style) { float width; StringBuilder sb = new StringBuilder(); if (style instanceof PolygonStyle) { width = ((PolygonStyle) style).getLineWidth(); } else if (style instanceof LineStyle) { width = ((LineStyle) style).getLineWidth(); } else { width = 1; } //Fill Color if (style.isFilled()) { sb.append("fill:#"); sb.append(getHexColor(style.getFillColor())); sb.append(";"); sb.append("fill-opacity:1;"); } else { sb.append("fill:none;"); } //Outline Color if (style.getOutlineStyles().size() > 0) { //no stroke, outlines will be seperate objects sb.append("stroke:none"); sb.append("stroke-opacity:0"); } else { sb.append("stroke:#"); sb.append(getHexColor(style.getOutlineColor())); sb.append(";"); sb.append("stroke-opacity:1;"); } //Stroke Width if (style.getOutlineStyles().size() > 0) { //no stroke, outlines will be seperate objects sb.append("stroke-width:0px"); } else { sb.append("stroke:"); sb.append(width); sb.append("px;"); } sb.append("stroke-linecap:butt;"); sb.append("stroke-linejoin:miter"); return sb.toString(); } /** * Returns the hex version of a Color object. * Output is red, green, blue. * * @param c * @return */ public static String getHexColor(Color c) { String hexColor, b, g, r; b = Integer.toHexString(c.getBlue()); g = Integer.toHexString(c.getGreen()); r = Integer.toHexString(c.getRed()); if (b.length() == 1) b = "0" + b; if (g.length() == 1) g = "0" + g; if (r.length() == 1) r = "0" + r; hexColor = r + g + b; return hexColor; } private String getIndent() { StringBuilder sb = new StringBuilder(); for (int i = 0; i < indentCount; i++) sb.append("\t"); return sb.toString(); } private void removeIndent() { indentCount--; } private void writeImage(BufferedWriter outputStream, IconStyle style, Coordinate c, String id) { BufferedImage bi; byte[] imageBytes; ByteArrayOutputStream baos; float x, y, height, width; ImageIcon image; OutputStream os64; Point2D.Float point; String imageEnc; try { point = c.getCenterPoint(); if (style.getImageFile() == null) { //No image outputStream.write(getIndent()); outputStream.write("<circle cx=\""); outputStream.write(Float.toString(point.x - 2)); outputStream.write("\" cy=\""); outputStream.write(Float.toString(point.y - 2)); outputStream.write("\" r=\"2\" stroke=\"#"); outputStream.write(getHexColor(style.getOutlineColor())); outputStream.write("\" stroke-width=\"1\" fill=\""); outputStream.write(getHexColor(style.getFillColor())); outputStream.write("\"/>\n"); } else { //Has image //first encode image into a string baos = new ByteArrayOutputStream(); bi = ImageIO.read(style.getImageFile()); ImageIO.write(bi, "PNG", baos); imageBytes = baos.toByteArray(); imageEnc = Base64.encodeBase64String(imageBytes); baos.close(); image = style.getObjectImage(); height = image.getIconHeight(); width = image.getIconWidth(); x = point.x - (width / 2.0f); y = point.y - (height / 2.0f); outputStream.write(getIndent()); outputStream.write("<image\n"); addIndent(); //y coordiante outputStream.write(getIndent()); outputStream.write("y=\""); outputStream.write(Float.toString(y)); outputStream.write("\"\n"); //x coordiante outputStream.write(getIndent()); outputStream.write("x=\""); outputStream.write(Float.toString(x)); outputStream.write("\"\n"); //id outputStream.write(getIndent()); outputStream.write("id=\""); outputStream.write(id); outputStream.write("\"\n"); //xlink outputStream.write(getIndent()); outputStream.write("xlink:href=\"data:image/png;base64,"); outputStream.write(imageEnc); outputStream.write("\"\n"); //x coordiante outputStream.write(getIndent()); outputStream.write("height=\""); outputStream.write(Float.toString(height)); outputStream.write("\"\n"); //y coordiante outputStream.write(getIndent()); outputStream.write("width=\""); outputStream.write(Float.toString(width)); outputStream.write("\" />\n"); } } catch (Exception e) { Logger.log(Logger.ERR, "Error in SvgExporter.writeImage() - " + e); } } private void writePath(BufferedWriter outputStream, String id, CoordinateList<Coordinate> coordinates, ColorStyle style, boolean closePath) { Coordinate c; String styleString; try { styleString = generateStyleString(style); outputStream.write(getIndent()); outputStream.write("<path\n"); addIndent(); outputStream.write(getIndent()); outputStream.write("style=\""); outputStream.write(styleString); outputStream.write("\"\n"); //write out points outputStream.write(getIndent()); outputStream.write("d=\"M "); for (int i = 0; i < coordinates.size(); i++) { c = coordinates.get(i); if (i > 0) { outputStream.write("L "); } outputStream.write(Float.toString(c.getCenterPoint().x)); outputStream.write(" "); outputStream.write(Float.toString(c.getCenterPoint().y)); if (i + 1 < coordinates.size()) outputStream.write(" "); } if (closePath) outputStream.write(" Z"); outputStream.write("\"\n"); //write out id outputStream.write(getIndent()); outputStream.write("id=\""); outputStream.write(id); outputStream.write("\""); //close tag outputStream.write(" />\n"); removeIndent(); } catch (Exception e) { Logger.log(Logger.ERR, "Error in SvgExporter.writePath(BufferedWriter, String, CoordinateList, ColorStyle - " + e); } } private void writeSvgLine(BufferedWriter outputStream, String id, CoordinateList<Coordinate> coordinates, ColorStyle style, boolean isOutline) { Coordinate c; String styleString; try { styleString = generateLineStyleString(style, isOutline); addIndent(); outputStream.write(getIndent()); outputStream.write("<polyline points=\""); for (int i = 0; i < coordinates.size(); i++) { c = coordinates.get(i); outputStream.write(Float.toString(c.getCenterPoint().x)); outputStream.write(","); outputStream.write(Float.toString(c.getCenterPoint().y)); if (i + 1 < coordinates.size()) outputStream.write(" "); } outputStream.write("\"\n"); outputStream.write(getIndent()); outputStream.write("style=\""); outputStream.write(styleString); outputStream.write("\" />\n"); removeIndent(); } catch (Exception e) { Logger.log(Logger.ERR, "Error in SvgExporter.writePolyLine(BufferedWriter, String, CoordinateList, ColorStyle - " + e); } } }