Application: gvSIG desktop » gvSIG scripting

package org.gvsig.scripting.swing.impl.syntaxhighlight;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JComponent;

import javax.swing.JEditorPane;

import javax.swing.JScrollPane;

import javax.swing.event.CaretEvent;

import javax.swing.event.CaretListener;

import javax.swing.text.BadLocationException;

import javax.swing.text.Document;

import javax.swing.text.JTextComponent;

import javax.swing.text.StyledEditorKit;

import org.gvsig.scripting.swing.api.SyntaxtHighlightTextComponent;

import org.gvsig.scripting.swing.api.SyntaxtHighlightTextComponent.UpdateCaretPositionActionEvent;

import org.gvsig.scripting.swing.impl.syntaxhighlight.styles.JavaStyledDocument;

import org.gvsig.scripting.swing.impl.syntaxhighlight.styles.PythonStyledDocument;

public class JEditorPaneSyntaxHighlighting extends JEditorPane implements SyntaxtHighlightTextComponent {

        /**

         * 

         */

        private static final long serialVersionUID = -4451156833693922180L;

        protected ActionListener updateCaretPosition = null; 

        public JEditorPaneSyntaxHighlighting() {

                this.setEditorKitForContentType(

                                "text/java",

                                new StyledEditorKit()

                                {

                                        /**

                                         * 

                                         */

                                        private static final long serialVersionUID = 2002618010308466332L;

                                        public Document createDefaultDocument()

                                        {

                                                return new JavaStyledDocument();

                                        }

                                }

                );

                this.setEditorKitForContentType(

                                "text/javascript",

                                new StyledEditorKit()

                                {

                                        /**

                                         * 

                                         */

                                        private static final long serialVersionUID = 830100022798600914L;

                                        public Document createDefaultDocument()

                                        {

                                                return new JavaStyledDocument();

                                        }

                                }

                );

                this.setEditorKitForContentType(

                                "text/python",

                                new StyledEditorKit()

                                {

                                        /**

                                         * 

                                         */

                                        private static final long serialVersionUID = -2728112890159261335L;

                                        public Document createDefaultDocument()

                                        {

                                                return new PythonStyledDocument();

                                        }

                                }

                );

                final JEditorPaneSyntaxHighlighting source = this;

                this.addCaretListener(new CaretListener() {

                        public void caretUpdate(CaretEvent e) {

                                if( updateCaretPosition== null ) {

                                        return;

                                }

                                int lineNumber = 1;

                                int columnNumber = 0;

                                int currentPosition = getCaretPosition();

                                Document doc = getDocument();

                                PythonStyledDocument pydoc = null;

                                if( doc instanceof PythonStyledDocument ) {

                                        pydoc  = (PythonStyledDocument) doc;

                                }

                                try        {

                                        String strText = doc.getText(0, currentPosition);

                                        char arrText[] = strText.toCharArray();

                                        for(int i=0; i<strText.length(); i++) {

                                                if(arrText[i] == '\n') lineNumber++;

                                        }

                                        columnNumber = currentPosition - strText.lastIndexOf('\n');

                                }

                                catch(BadLocationException ble)        {

                                        System.err.println(ble);

                                }

                                if( pydoc != null ) {

                                        pydoc.setPosition(lineNumber, columnNumber);

                                }

                                updateCaretPosition.actionPerformed(

                                                new DefaultUpdateCaretPositionActionEvent(source, 1, "position", lineNumber, columnNumber));

                        }

                });

        }

        public void addUpdateCaretPositionActionListener(ActionListener updateCaretPosition) {

                this.updateCaretPosition = updateCaretPosition;  

        }

        public JScrollPane getJScrollPane() {

                return  new JScrollPane(this);

        }

        public JTextComponent getJTextComponent() {

                return this;

        }

        @Override

        public JComponent asJComponent() {

            return this.getJScrollPane();

        }

        public class DefaultUpdateCaretPositionActionEvent extends ActionEvent implements UpdateCaretPositionActionEvent {

                int line = -1;

                int column = -1;

                public DefaultUpdateCaretPositionActionEvent(Object source, int id,

                                String command, int line, int column) {

                        super(source, id, command);

                        this.line = line;

                        this.column = column;

                }

                public int getLine() {

                        return this.line;

                }

                public int getColumn() {

                        return this.column;

                }

                public boolean hasLineAndColumn() {

                        return this.line >=0 && this.column >= 0;

                }

        }

}