Application: gvSIG desktop

package org.gvsig.labeling.symbol;

import java.awt.BasicStroke;

import java.awt.Color;

import java.awt.Font;

import java.awt.Graphics2D;

import java.awt.Rectangle;

import java.awt.RenderingHints;

import java.awt.Shape;

import java.awt.font.FontRenderContext;

import java.awt.font.GlyphVector;

import java.awt.font.LineMetrics;

import java.awt.geom.AffineTransform;

import org.gvsig.compat.print.PrintAttributes;

import org.gvsig.fmap.dal.feature.Feature;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.Geometry.SUBTYPES;

import org.gvsig.fmap.geom.Geometry.TYPES;

import org.gvsig.fmap.geom.GeometryLocator;

import org.gvsig.fmap.geom.GeometryManager;

import org.gvsig.fmap.geom.exception.CreateGeometryException;

import org.gvsig.fmap.geom.primitive.Envelope;

import org.gvsig.fmap.geom.primitive.GeneralPathX;

import org.gvsig.fmap.geom.primitive.Point;

import org.gvsig.fmap.geom.primitive.Surface;

import org.gvsig.fmap.mapcontext.MapContextLocator;

import org.gvsig.fmap.mapcontext.ViewPort;

import org.gvsig.fmap.mapcontext.rendering.legend.styling.IPlacementConstraints;

import org.gvsig.fmap.mapcontext.rendering.symbols.CartographicSupport;

import org.gvsig.fmap.mapcontext.rendering.symbols.ISymbol;

import org.gvsig.fmap.mapcontext.rendering.symbols.ITextSymbol;

import org.gvsig.fmap.mapcontext.rendering.symbols.SymbolDrawingException;

import org.gvsig.fmap.mapcontext.rendering.symbols.SymbolPreferences;

import org.gvsig.labeling.placements.PointPlacementConstraints;

import org.gvsig.symbology.fmap.mapcontext.rendering.legend.styling.TextPath;

import org.gvsig.symbology.fmap.mapcontext.rendering.symbol.fill.IFillSymbol;

import org.gvsig.symbology.fmap.mapcontext.rendering.symbol.text.ISimpleTextSymbol;

import org.gvsig.tools.ToolsLocator;

import org.gvsig.tools.dynobject.DynStruct;

import org.gvsig.tools.persistence.PersistenceManager;

import org.gvsig.tools.persistence.PersistentState;

import org.gvsig.tools.persistence.exception.PersistenceException;

import org.gvsig.tools.task.Cancellable;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

/**

 * Class used to create symbols composed using a text defined by

 * the user.This text can be edited (changing the color, the font of the characters, and

 * the rotation of the text)and has the property that can follow a path.If this path

 * does not exist, the text is treated as a simpletextsymbol (when is drawn).

 * @author   jaume dominguez faus - jaume.dominguez@iver.es

 */

public class SmartTextSymbol implements ISimpleTextSymbol, CartographicSupport {

        private static final Logger logger = LoggerFactory.getLogger(

                        SmartTextSymbol.class);

        // ===========================

        public static final String SMART_TEXT_SYMBOL_PERSISTENCE_DEFINITION_NAME =

                        "SMART_TEXT_SYMBOL_PERSISTENCE_DEFINITION_NAME";

        private static final String FIELD_UNIT = "unit";

        private static final String FIELD_REFERENCE_SYSTEM = "referenceSystem";

        private static final String FIELD_IS_SHAPE_VISIBLE = "isShapeVisible";

        private static final String FIELD_DESCRIPTION = "description";

        private static final String FIELD_TEXT = "text";

        private static final String FIELD_FONT = "font";

        private static final String FIELD_TEXT_COLOR = "textColor";

        private static final String FIELD_ROTATION = "rotation";

        private static final String FIELD_AUTO_RESIZE = "autoResize";

        // ====================================

        private static final String FIELD_HAS_HALO = "hasHalo";

        private static final String FIELD_HALO_COLOR = "haloColor";

        private static final String FIELD_HALO_WIDTH = "haloWidth";

        // ====================================

        public static final int SYMBOL_STYLE_TEXTALIGNMENT_LEFT = 0;

        public static final int SYMBOL_STYLE_TEXTALIGNMENT_RIGHT = 1;

        public static final int SYMBOL_STYLE_TEXTALIGNMENT_CENTERED = 2;

        // ===========================

        private static GeometryManager geoman = GeometryLocator.getGeometryManager();

        private String text;

        private FontRenderContext frc = new FontRenderContext(

                        new AffineTransform(), false, true);

        // Background: ITextBackground

//        Case

        private double characterSpacing;

        private double characterWidth;

//        Direction

        private IFillSymbol fillSymbol;

        private double flipAngle;

//        boolean kerning;

        private double leading;

//        Position: textPosition

        private Color ShadowColor;

        private double ShadowXOffset;

        private double ShadowYOffset;

//        TypeSetting: Boolean

        private double wordSpacing;

//        ISimpleTextSymbol : ITextSymbol

//        BreakCharacter: Long

//        Clip: Boolean

        private TextPath textPath;

        private double xOffset;

        private double yOffset;

        private double angle;

//        Color: IColor

//        HorizontalAlignment:

//        esriTextHorizontalAlignment

        private boolean rightToLeft;

        //        VerticalAlignment

        private double maskSize;

//        MaskStyle

        private  IFillSymbol maskSymbol;

        private double margin;

        private int alignment;

        private boolean kerning = false;

        private TextPath tp;

        private IPlacementConstraints constraints;

        private boolean shapeVisible = true;

        private int unit = -1;

        private int referenceSystem = CartographicSupport.WORLD;

        private double rotation = 0;

        private String desc = "";

        private Color textColor = Color.BLACK;

        private Font font;

        private boolean autoresize = false;

        // =======================

        private boolean hasHalo = false;

        private Color haloColor = Color.WHITE;

        private float haloWidth = 3;

        private BasicStroke haloStroke = new BasicStroke(

                        6, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND);

        // =======================

        public SmartTextSymbol(ITextSymbol sym, IPlacementConstraints constraints) {

//                if(sym instanceof SimpleTextSymbol){

//                        SimpleTextSymbol mySym = (SimpleTextSymbol)sym;

                        this.setAutoresizeEnabled(sym.isAutoresizeEnabled());

                        this.setDescription(sym.getDescription());

                        this.setFont(sym.getFont());

                        this.setFontSize(sym.getFont().getSize());

                        this.setIsShapeVisible(sym.isShapeVisible());

                        this.setText(sym.getText());

                        this.setTextColor(sym.getTextColor());

                        this.setDrawWithHalo(sym.isDrawWithHalo());

                        this.setHaloColor(sym.getHaloColor());

                        this.setHaloWidth(sym.getHaloWidth());

                        this.constraints = constraints;

                        setCharacterSpacing(2); //???

                        setWordSpacing(TextPath.DEFAULT_WORD_SPACING);

                        boolean rtl = false; // right to left text

                        if (constraints.isAtTheBeginingOfLine()) {

                                if (rtl) {

                                        setAlignment(SYMBOL_STYLE_TEXTALIGNMENT_RIGHT);

                                }

                                else {

                                        setAlignment(SYMBOL_STYLE_TEXTALIGNMENT_LEFT);

                                }

                        }

                        else if (constraints.isAtTheEndOfLine()) {

                                if (rtl) {

                                        setAlignment(SYMBOL_STYLE_TEXTALIGNMENT_LEFT);

                                }

                                else {

                                        setAlignment(SYMBOL_STYLE_TEXTALIGNMENT_RIGHT);

                                }

                        }

                        else { //constraints.isInTheMiddleOfLine() or constraints.isAtBestOfLine()

                                setAlignment(SYMBOL_STYLE_TEXTALIGNMENT_CENTERED);

                        }

                        setKerning(false);

                        setRightToLeft(rtl);

                // }

        }

        public void setIsShapeVisible(boolean v) {

                this.shapeVisible = v;

        }

        public boolean isShapeVisible() {

                return shapeVisible;

        }

        public SmartTextSymbol() {

                PointPlacementConstraints pc = new PointPlacementConstraints();

                this.constraints = pc;

                SymbolPreferences preferences =

                                MapContextLocator.getSymbolManager().getSymbolPreferences();

                font = preferences.getDefaultSymbolFont();

                textColor = preferences.getDefaultSymbolColor();

        }

        /**

         * Draws the text according. If this symbol has the text path set, then

         * it is used as the text line, otherwise shp <b>must be an FPoint2D</b>

         * indicating the starting point of the text and then the text will

         * be rendered from there and following the rotation previously set.

         */

        public void draw(Graphics2D g, AffineTransform affineTransform,

                        Geometry geom, Feature f, Cancellable cancel) {

                if (!isShapeVisible()) return;

                setMargin(0);

                char[] text_chars = text.toCharArray();

                tp = new TextPath(g, geom, text_chars, getFont(),

                                (float) characterSpacing, (float) characterWidth, kerning,

                                (float) leading, alignment, (float) wordSpacing, (float) margin, rightToLeft);

                Font font = getFont();

                g.setFont(font);

                FontRenderContext frc = g.getFontRenderContext();

                LineMetrics lineMetrics = font.getLineMetrics(getText(), frc);

//                GlyphVector glyph =  font.layoutGlyphVector(frc, charText, 0, charText.length, Font.LAYOUT_NO_START_CONTEXT);

                double cons = 0;

                /* Repartimos el leading (espacio de separaci?n entre lineas)

                 * arriba y abajo para que exista la misma separaci?n entre la

                 * caja de la letra y la linea tanto si se dibuja por abajo como

                 * si se dibuja por arriba. 

                 */

                if(this.constraints.isAboveTheLine()) {

                        cons = lineMetrics.getDescent()+lineMetrics.getLeading()/2;

                }

                else if (this.constraints.isBelowTheLine()) {

                        cons = -(lineMetrics.getAscent()+lineMetrics.getLeading()/2);

                }

                /* Dibujamos la letra de tal manera que el centro de la caja de letra

                 * coincida con la linea

                 */

                else if(this.constraints.isOnTheLine()) {

//                        cons = lineMetrics.getDescent()+(lineMetrics.getLeading()/2)-(lineMetrics.getHeight()/2);

                        cons = lineMetrics.getDescent()+lineMetrics.getLeading()-(lineMetrics.getHeight()/2);

                }

                double[] coords = tp.nextPosForGlyph(0);

                for (int i = 0; i < tp.getGlyphCount(); i++) {

                        coords = tp.nextPosForGlyph(i);

                        if (coords[0] == TextPath.NO_POS || coords[1] == TextPath.NO_POS)

                                continue;

                        // move the label 'cons" units above/below the line

                        double xOffset = cons * Math.sin(coords[2]);

                        double yOffset = cons * Math.cos(coords[2]);

                        g.translate(coords[0]+xOffset, coords[1]-yOffset);

                        g.rotate(coords[2]);

                        char[] aux = new char[1];

                        aux[0] = text_chars[i];

                        if (isDrawWithHalo()) {

                                GlyphVector glyph = font.createGlyphVector(frc, aux);

                                Shape outlineChar = glyph.getOutline();

                                g.setStroke(haloStroke);

                                g.setColor(getHaloColor());

                                g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,

                                                RenderingHints.VALUE_ANTIALIAS_ON);

                                g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,

                                                RenderingHints.VALUE_INTERPOLATION_BILINEAR);

                                // =============================

                                g.draw(outlineChar);

                                // =============================

                                g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,

                                                RenderingHints.VALUE_ANTIALIAS_OFF);

                        }

                        g.setColor(this.getTextColor());

                        g.drawString(String.valueOf(text_chars[i]), 0, 0);

                        g.rotate(-coords[2]);

                        g.translate(-coords[0]-xOffset, -coords[1]+yOffset);

                }

        }

        public void getPixExtentPlus(

                        Geometry shp, float[] distances, ViewPort viewPort, int dpi) {

                /*

                 * TODO Is this used?

                 */

                distances[0] = 0;

                distances[1] = 0;

                // throw new RuntimeException("Not yet implemented!");

        }

        public int getOnePointRgb() {

                return getTextColor().getRGB();

        }

        /*

        public XMLEntity getXMLEntity() {

                XMLEntity xml = new XMLEntity();

                xml.putProperty("className", getClassName());

                xml.putProperty("desc", getDescription());

                xml.putProperty("isShapeVisible", isShapeVisible());

                return xml;

        }

        */

        public int getSymbolType() {

                return Geometry.TYPES.GEOMETRY;

        }

        public boolean isSuitableFor(Geometry geom) {

                return geom.getGeometryType().isTypeOf(TYPES.CURVE);

        }

        public void drawInsideRectangle(

                        Graphics2D g,

                        AffineTransform scaleInstance,

                        Rectangle r,

                        PrintAttributes properties) throws SymbolDrawingException {

                // let's take the bottom segment of the rectangle as the line

                Surface surf = null;

                try {

                        surf = geoman.createSurface(SUBTYPES.GEOM2D);

                } catch (CreateGeometryException e) {

                        logger.info("Error while creating surface.", e);

                        throw new SymbolDrawingException(

                                        SymbolDrawingException.UNSUPPORTED_SET_OF_SETTINGS);

                }

                surf.addVertex(r.getX(), r.getY());

                surf.addVertex(r.getX() + r.getWidth(), r.getY());

                if (properties == null) {

                        draw(g, scaleInstance, surf, null, null);

                } else {

                        print(g, scaleInstance, surf, properties);

                }

        }

        /*

        public void setXMLEntity(XMLEntity xml) {

                setFont(new Font("Arial", Font.PLAIN, 18));

                setText("this is my TEST text that follows a line");

                setDescription(xml.getStringProperty("desc"));

                setIsShapeVisible(xml.getBooleanProperty("isShapeVisible"));

        }

        */

        public void setText(String txt) {

                this.text = txt;

        }

        public String getText() {

                return text;

        }

        public void setCharacterSpacing(double charSpacing) {

                this.characterSpacing = charSpacing;

        }

        public void setWordSpacing(double wordSpacing) {

                this.wordSpacing = wordSpacing;

        }

        public void setAlignment(int alignment) {

                this.alignment = alignment;

        }

        public void setKerning(boolean kerning) {

                this.kerning = kerning;

        }

        public void setMargin(double margin) {

                this.margin = margin;

        }

        public void setRightToLeft(boolean rightToLeft) {

                this.rightToLeft = rightToLeft;

        }

        // ==============================================

        // ==============================================

        // ==============================================

        public ISymbol getSymbolForSelection() {

                return this;

        }

        public boolean isOneDotOrPixel(Geometry geom,

                        double[] positionOfDotOrPixel, ViewPort viewPort, int dpi) {

                int type = geom.getType();

                switch (type) {

                case Geometry.TYPES.NULL:

                case Geometry.TYPES.POINT:

                case Geometry.TYPES.MULTIPOINT:

                        return false;

                default:

                        Envelope geomBounds = geom.getEnvelope();

                        double dist1Pixel = viewPort.getDist1pixel();

                        float[] distances = new float[2];

                        this.getPixExtentPlus(geom, distances, viewPort, dpi);

                        boolean onePoint =

                                        ((geomBounds.getLength(0) + distances[0] <= dist1Pixel)

                                        && (geomBounds.getLength(1) + distances[1] <= dist1Pixel));

                        if (onePoint) {

                                positionOfDotOrPixel[0] = geomBounds.getMinimum(0);

                                positionOfDotOrPixel[1] = geomBounds.getMinimum(1);

                        }

                        return onePoint;

                }

        }

        public String getDescription() {

                return desc;

        }

        public void setDescription(String d) {

                desc = d;

        }

        public Color getColor() {

                return this.getTextColor();

        }

        public void setColor(Color color) {

                this.setTextColor(color);

        }

        public void print(Graphics2D g, AffineTransform at, Geometry geom,

                        PrintAttributes properties) {

                /*

                 * TODO Use properties

                 * (perhaps when using things of CartographicSupport)

                 */

                this.draw(g,  at, geom, null, null);

        }

        public void setFont(Font fnt) {

                this.font = fnt;

        }

        public Font getFont() {

                return font;

        }

        public Color getTextColor() {

                return this.textColor;

        }

        public void setTextColor(Color color) {

                this.textColor = color;

        }

        public void setFontSize(double d) {

                Font newFont = new Font(

                                font.getName(),

                                font.getStyle(),

                                Math.round((float) d));

                this.font = newFont;                

        }

        public Geometry getTextWrappingShape(Point p) {

                Font font = getFont();

                GlyphVector gv = font.createGlyphVector(frc, text);

                Shape shape = gv.getOutline((float) p.getX(), (float) p.getY());

                Geometry myFShape;

                try {

                        myFShape = geoman.createSurface(new GeneralPathX(shape

                                        .getBounds2D().getPathIterator(null)), SUBTYPES.GEOM2D);

                        myFShape.transform(AffineTransform.getTranslateInstance(p.getX(), p.getY()));

                        if (rotation != 0) {

                                myFShape.transform(AffineTransform.getRotateInstance(rotation));

                        }

                        return myFShape;

                } catch (CreateGeometryException e) {

                        logger.error("Error creating a surface", e);

                }

                return null;

        }

        public Rectangle getBounds() {

                Rectangle bounds = null;

                try {

                        Geometry aux = getTextWrappingShape(geoman.createPoint(0,0, SUBTYPES.GEOM2D));

                        Envelope env = aux.getEnvelope();

                        bounds = new Rectangle(

                                        (int) env.getMinimum(0),

                                        (int) env.getMinimum(1),

                                        (int) env.getLength(0),

                                        (int) env.getLength(1));

                } catch (CreateGeometryException e) {

                        logger.error("Error creating a point", e);

                }

                return bounds;

        }

        public double getRotation() {

                return this.rotation;

        }

        public void setRotation(double rot) {

                this.rotation = rot;

        }

        public void setAutoresizeEnabled(boolean ar) {

                autoresize = ar;

        }

        public boolean isAutoresizeEnabled() {

                return autoresize;

        }

        public Color getHaloColor() {

                return this.haloColor;

        }

        public void setHaloColor(Color co) {

                this.haloColor = co;

        }

        public float getHaloWidth() {

                return this.haloWidth;

        }

        public void setHaloWidth(float w) {

                this.haloWidth = w;

                this.haloStroke = new BasicStroke(

                                2*haloWidth, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND);

        }

        public boolean isDrawWithHalo() {

                return this.hasHalo;

        }

        public void setDrawWithHalo(boolean h) {

                this.hasHalo = h;

        }

        // ==============================

        public void setUnit(int unitIndex) {

                unit = unitIndex;

        }

        public int getUnit() {

                return unit;

        }

        public int getReferenceSystem() {

                return this.referenceSystem;

        }

        public void setReferenceSystem(int rs) {

                this.referenceSystem = rs;

        }

        public void setCartographicSize(double cartographicSize, Geometry geom) {

                setFontSize(cartographicSize);

        }

        public double toCartographicSize(ViewPort viewPort, double dpi, Geometry geom) {

                double oldSize = getFont().getSize();

                setCartographicSize(getCartographicSize(viewPort, dpi, geom), geom);

                return oldSize;

        }

        public double getCartographicSize(ViewPort viewPort, double dpi, Geometry geom) {

                return SymbolUtils.        getCartographicLength(

                                this, getFont().getSize(), viewPort, dpi);

        }

        // ========================

        public Object clone() throws CloneNotSupportedException {

                return super.clone();

        }

        // ==========================

        public static void registerPersistent() {

                PersistenceManager manager = ToolsLocator.getPersistenceManager();

                if( manager.getDefinition(SMART_TEXT_SYMBOL_PERSISTENCE_DEFINITION_NAME)==null ) {

                        DynStruct definition = manager.addDefinition(

                                        SmartTextSymbol.class,

                                        SMART_TEXT_SYMBOL_PERSISTENCE_DEFINITION_NAME,

                                        SMART_TEXT_SYMBOL_PERSISTENCE_DEFINITION_NAME+" Persistence definition",

                                        null, 

                                        null

                        );

                        definition.addDynFieldString(FIELD_DESCRIPTION).setMandatory(true);

                        definition.addDynFieldBoolean(FIELD_IS_SHAPE_VISIBLE).setMandatory(true);

                        definition.addDynFieldInt(FIELD_REFERENCE_SYSTEM).setMandatory(true);

                        definition.addDynFieldInt(FIELD_UNIT).setMandatory(true);

                        definition.addDynFieldBoolean(FIELD_AUTO_RESIZE).setMandatory(true);

                        definition.addDynFieldObject(FIELD_FONT).setClassOfValue(Font.class).setMandatory(true);

                        definition.addDynFieldDouble(FIELD_ROTATION).setMandatory(true);

                        definition.addDynFieldString(FIELD_TEXT).setMandatory(true);

                        definition.addDynFieldObject(FIELD_TEXT_COLOR).setClassOfValue(Color.class).setMandatory(true);

                        // halo

                        definition.addDynFieldBoolean(FIELD_HAS_HALO).setMandatory(true);

                        definition.addDynFieldObject(FIELD_HALO_COLOR).setClassOfValue(

                                        Color.class).setMandatory(true);

                        definition.addDynFieldFloat(FIELD_HALO_WIDTH).setMandatory(true);

                }

        }

        public void loadFromState(PersistentState state)

                        throws PersistenceException {

                setDescription(state.getString(FIELD_DESCRIPTION));

                setIsShapeVisible(state.getBoolean(FIELD_IS_SHAPE_VISIBLE));

                setReferenceSystem(state.getInt(FIELD_REFERENCE_SYSTEM));

                setUnit(state.getInt(FIELD_UNIT));

                setAutoresizeEnabled(state.getBoolean(FIELD_AUTO_RESIZE));

                setFont((Font) state.get(FIELD_FONT));

                setRotation(state.getDouble(FIELD_ROTATION));

                setText(state.getString(FIELD_TEXT));

                setTextColor((Color) state.get(FIELD_TEXT_COLOR));

                // halo

                this.setDrawWithHalo(state.getBoolean(FIELD_HAS_HALO));

                this.setHaloColor((Color) state.get(FIELD_HALO_COLOR));

                this.setHaloWidth(state.getFloat(FIELD_HALO_WIDTH));

        }

        public void saveToState(PersistentState state) throws PersistenceException {

                state.set(FIELD_DESCRIPTION, getDescription());

                state.set(FIELD_IS_SHAPE_VISIBLE, isShapeVisible());

                state.set(FIELD_REFERENCE_SYSTEM, getReferenceSystem());

                state.set(FIELD_UNIT, getUnit());

                state.set(FIELD_AUTO_RESIZE, isAutoresizeEnabled());

                state.set(FIELD_FONT, getFont());

                state.set(FIELD_ROTATION, getRotation());

                state.set(FIELD_TEXT, getText());

                state.set(FIELD_TEXT_COLOR, getTextColor());

                // halo

                state.set(FIELD_HAS_HALO, this.isDrawWithHalo());

                state.set(FIELD_HALO_COLOR, this.getHaloColor());

                state.set(FIELD_HALO_WIDTH, this.getHaloWidth());

        }

}