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/* gvSIG. Geographic Information System of the Valencian Government

 *

 * Copyright (C) 2007-2008 Infrastructures and Transports Department

 * of the Valencian Government (CIT)

 * 

 * 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 2

 * 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, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, 

 * MA  02110-1301, USA.

 * 

 */

package org.gvsig.symbology.fmap.mapcontext.rendering.symbol.text.impl;

import java.awt.Color;

import java.awt.Font;

import java.awt.FontMetrics;

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.geom.AffineTransform;

import java.awt.geom.Rectangle2D;

import org.gvsig.compat.print.PrintAttributes;

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

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.GeometryLocator;

import org.gvsig.fmap.geom.GeometryManager;

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

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

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

import org.gvsig.fmap.mapcontext.MapContextLocator;

import org.gvsig.fmap.mapcontext.ViewPort;

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.symbology.fmap.mapcontext.rendering.symbol.impl.AbstractSymbol;

import org.gvsig.symbology.fmap.mapcontext.rendering.symbol.impl.CartographicSupportToolkit;

import org.gvsig.tools.ToolsLocator;

import org.gvsig.tools.dynobject.DynClass;

import org.gvsig.tools.persistence.PersistenceException;

import org.gvsig.tools.persistence.PersistentState;

import org.gvsig.tools.task.Cancellable;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

/**

 * SimpleTextSymbol is a 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).

 * @author 2005-2008 jaume dominguez faus - jaume.dominguez@iver.es

 * @author 2009-     <a href="cordinyana@gvsig.org">C?sar Ordi?ana</a> - gvSIG team

 */

public class SimpleTextSymbol extends AbstractSymbol implements ITextSymbol {

        public static final String SIMPLE_TEXT_SYMBOL_DYNCLASS_NAME = "SimpleTextSymbol";

        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 GeometryManager geomManager = GeometryLocator.getGeometryManager();

        private String text = "";

        private Font font;

        private Color textColor;

        private double rotation;

        private FontRenderContext frc = new FontRenderContext(

                        new AffineTransform(), false, true);

        private boolean autoresize;

        final static private Logger logger = LoggerFactory.getLogger(SimpleTextSymbol.class);

        public SimpleTextSymbol() {

                super();

                SymbolPreferences preferences =

                                MapContextLocator.getSymbolManager().getSymbolPreferences();

                font = preferences.getDefaultSymbolFont();

                textColor = preferences.getDefaultSymbolColor();

        }

        public void draw(Graphics2D g, AffineTransform affineTransform,

                        Geometry geom, Feature feature, Cancellable cancel) {

                if (!isShapeVisible()) {

                        return;

                }

                g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

                g.setColor(textColor);

                g.setFont(font);

                g.translate(((org.gvsig.fmap.geom.primitive.Point) geom).getX(), ((org.gvsig.fmap.geom.primitive.Point) geom).getY());

                g.rotate(rotation);

                Rectangle2D bounds = getBounds();

//                 getBounds devuelve el bounds de un texto dibujado de manera que

                // la linea base de la primera letra est? en el punto (0,0).

                // Por eso, si queremos alinear el texto de manera que la parte superior

                // izquierda de la primera letra est? en (0,0) debemos moverlo seg?n

                // el valor de la ordenada, en lugar de seg?n su altura.

                g.drawString(getText(), 0, (int)-bounds.getY());//(int) bounds.getHeight());

                g.rotate(-rotation);

                g.translate(-((org.gvsig.fmap.geom.primitive.Point) geom).getX(), -((org.gvsig.fmap.geom.primitive.Point) geom).getY());

        }

        public void drawInsideRectangle(Graphics2D g,

                        AffineTransform scaleInstance, Rectangle r, PrintAttributes properties) throws SymbolDrawingException {

                int s = getFont().getSize();

                if (autoresize) {

                        if (s==0) {

                                s =1;

                                setFontSize(s);

                        }

                        g.setFont(getFont());

                    FontMetrics fm = g.getFontMetrics();

                    Rectangle2D rect = fm.getStringBounds(text, g);

                    double width = rect.getWidth();

                    double height = rect.getHeight();

                    double rWidth = r.getWidth();

                    double rHeight = r.getHeight();

                    double ratioText = width/height;

                    double ratioRect = rWidth/rHeight;

                    if (ratioText>ratioRect) {

                            s = (int) (s*(rWidth/width));

                    } else {

                            s = (int) (s*(rHeight/height));

                    }

//                    r.setLocation(r.x, (int) Math.round(r.getY()+r.getHeight()));

                }

                setFontSize(s);

//                g.setColor(Color.red);

//                g.draw(r);

                try {

                        if (properties==null)

                                draw(g, null, geomManager.createPoint(r.getX(), r.getY(),

                                                SUBTYPES.GEOM2D), null, null);

                        else

                                print(g, new AffineTransform(), geomManager.createPoint(r.getX(), r.getY(), SUBTYPES.GEOM2D), properties);

                } catch (CreateGeometryException e) {

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

                        e.printStackTrace();

                }

        }

        public int getOnePointRgb() {

                return textColor.getRGB();

        }

        public void getPixExtentPlus(org.gvsig.fmap.geom.Geometry geom, float[] distances,

                        ViewPort viewPort, int dpi) {

                throw new Error("Not yet implemented!");

        }

        public ISymbol getSymbolForSelection() {

                return this; // a text is not selectable

        }

        public int getSymbolType() {

                return Geometry.TYPES.TEXT;

        }

        public boolean isSuitableFor(Geometry geom) {

                return true;

        }

        public String getClassName() {

                return getClass().getName();

        }

        public void print(Graphics2D g, AffineTransform at, org.gvsig.fmap.geom.Geometry geom, PrintAttributes properties){

                float originalSize = getFont().getSize2D();

                float size=originalSize;

                // scale it to size

                int pq = properties.getPrintQuality();

                if (pq == PrintAttributes.PRINT_QUALITY_NORMAL){

                        size *= (double) 300/72;

                }else if (pq == PrintAttributes.PRINT_QUALITY_HIGH){

                        size *= (double) 600/72;

                }else if (pq == PrintAttributes.PRINT_QUALITY_DRAFT){

                        // d *= 72/72; // (which is the same than doing nothing)

                }

                setFont(getFont().deriveFont(size));

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

                setFont(getFont().deriveFont(originalSize));

        }

        public String getText() {

                return text;

        }

        public Font getFont() {

                return font;

        }

        public Color getTextColor() {

                return textColor;

        }

        public void setText(String text) {

                this.text = text;

        }

        public void setFont(Font font) {

                if (font == null) {

                        logger.warn("font <-- null");

                        return;

                }

                this.font = font;

        }

        public void setTextColor(Color color) {

                this.textColor = color;

        }

        public Color getColor() {

                return getTextColor();

        }

        public void setColor(Color color) {

                setTextColor(color);

        }

        public void setFontSize(double size) {

                Font newFont = new Font(font.getName(), font.getStyle(), (int) size);

                if (newFont == null) {

                        logger.warn(

                                        "Font(" + font.getName() + ", "

                                        + font.getStyle() + ", " + (int) size + " --> null");

                } else {

                        this.font = newFont;

                }

        }

        public double getRotation() {

                return rotation;

        }

        /**

         * Defines the angle of rotation for the text that composes the symbol

         *

         * @param rotation

         */

        public void setRotation(double rotation) {

                this.rotation = rotation;

        }

        /**

         * Returns an Geometry which represents a rectangle containing the text in

         * <b>screen</b> units.

         */

        public Geometry getTextWrappingShape(org.gvsig.fmap.geom.primitive.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 = geomManager.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);

                        e.printStackTrace();

                }

                return null;

        }

        public Rectangle getBounds() {

//                FontMetrics fm = g.getFontMetrics();

//                Rectangle2D rect = fm.getStringBounds("graphics", g);

                Rectangle bounds = null;

                try {

                        bounds = getTextWrappingShape(geomManager.createPoint(0,0, SUBTYPES.GEOM2D)).getBounds();

                } catch (CreateGeometryException e) {

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

                }

                return bounds;

        }

        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 CartographicSupportToolkit.

                                        getCartographicLength(this,

                                                                                  getFont().getSize(),

                                                                                  viewPort,

                                                                                  dpi);

        }

        public boolean isAutoresizeEnabled() {

                return autoresize;

        }

        public void setAutoresizeEnabled(boolean autoresizeFlag) {

                this.autoresize = autoresizeFlag;

        }

        public void loadFromState(PersistentState state)

                        throws PersistenceException {

                // Set parent fill symbol properties

                super.loadFromState(state);

                // Set own properties

                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));

        }

        public void saveToState(PersistentState state) throws PersistenceException {

                // Save parent fill symbol properties

                super.saveToState(state);

                // Save own properties

                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());

        }

        public static void registerPersistence() {

                // Add the SimpleTextSymbol DynClass definition.

                DynClass dynClass = ToolsLocator.getDynObjectManager().add(

                                SIMPLE_TEXT_SYMBOL_DYNCLASS_NAME);

                // Extend the Symbol base definition

                dynClass.extend(SYMBOL_DYNCLASS_NAME);

                // Auto resize?

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

                // Font

                dynClass.addDynFieldObject(FIELD_FONT).setMandatory(true);

                // Rotation

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

                // Text

                dynClass.addDynFieldString(FIELD_TEXT);

                // Text color

                dynClass.addDynFieldObject(FIELD_TEXT_COLOR).setMandatory(true);

                // Register in persistence

                ToolsLocator.getPersistenceManager().registerClass(

                                SimpleTextSymbol.class, dynClass);

        }

}