MathFieldProcessing.java

package org.geogebra.web.editor;

import org.geogebra.common.util.lang.Unicode;
import org.geogebra.keyboard.web.KeyboardConstants;
import org.geogebra.keyboard.web.KeyboardListener;
import org.geogebra.web.html5.gui.util.KeyboardLocale;

import com.himamis.retex.editor.share.event.KeyEvent;
import com.himamis.retex.editor.web.MathFieldW;

/**
 * Virtual keyboard bindings for ReTeX
 *
 */
public class MathFieldProcessing implements KeyboardListener {

	private MathFieldW mf;

	/**
	 * @param mf
	 *            math input field
	 */
	public MathFieldProcessing(MathFieldW mf) {
		this.mf = mf;
	}

	@Override
	public void setFocus(boolean focus) {
		mf.setFocus(focus);

	}

	@Override
	public void onEnter() {
		mf.getKeyListener().onKeyPressed(new KeyEvent(KeyEvent.VK_ENTER));
		mf.getKeyListener().onKeyReleased(new KeyEvent(KeyEvent.VK_ENTER));

	}

	@Override
	public void onBackSpace() {
		mf.getKeyListener().onKeyPressed(new KeyEvent(KeyEvent.VK_BACK_SPACE));

	}

	@Override
	public void onArrow(ArrowType type) {
		int arrowType = type == ArrowType.left ? KeyEvent.VK_LEFT
				: KeyEvent.VK_RIGHT;

		mf.getKeyListener().onKeyPressed(new KeyEvent(arrowType));

	}

	@Override
	public void insertString(String text) {
		if (text.equals(KeyboardConstants.A_POWER_X)) {
			mf.insertFunction("^");
		} else if (text.equals(Unicode.Superscript_2 + "")) {
			mf.insertFunction("^");
			type("2");
			mf.getKeyListener().onKeyPressed(
					new KeyEvent(KeyEvent.VK_RIGHT, 0, '\0'));
		} else if (Unicode.DIVIDE.equals(text)) {
			mf.insertFunction("frac");
		} else if (text.charAt(0) == Unicode.SQUARE_ROOT) {
			mf.insertFunction("sqrt");
		} else if ("log".equals(text)) {
			mf.insertFunction("log10");
		} else if ("10^".equals(text)) {
			type("10");
			mf.insertFunction("^");
		} else if (text.equals(Unicode.eulerChar + "^")) {
			mf.getKeyListener()
					.onKeyTyped(new KeyEvent(0, 0, Unicode.eulerChar));
			mf.insertFunction("^");
		} else if ("log_".equals(text)) {
			type("log_");
			mf.getKeyListener()
					.onKeyPressed(new KeyEvent(KeyEvent.VK_RIGHT, 0, '\0'));
			type("(");
			mf.getKeyListener()
					.onKeyPressed(new KeyEvent(KeyEvent.VK_LEFT, 0, '\0'));
			mf.getKeyListener()
					.onKeyPressed(new KeyEvent(KeyEvent.VK_LEFT, 0, '\0'));

		} else {
			int length = text.length();
			if (text.contains("/") || text.contains("^")) {
				mf.insertString(text);
				return;
			}
			if (length > 1 && Character.isLetter(text.charAt(0))
					&& !text.contains("[")) {
				mf.insertFunction(text);
				return;
			}
			type(text);
		}

	}

	private void type(String text) {
		for (int i = 0; i < text.length(); i++) {
			mf.getKeyListener().onKeyTyped(new KeyEvent(0, 0, text.charAt(i)),
					i == text.length() - 1);
		}

	}

	@Override
	public void scrollCursorIntoView() {
		// TODO Auto-generated method stub

	}

	@Override
	public boolean resetAfterEnter() {
		// TODO Auto-generated method stub
		return false;
	}

	@Override
	public void updateForNewLanguage(KeyboardLocale localization) {
		// TODO Auto-generated method stub

	}

	@Override
	public void setKeyBoardModeText(boolean text) {
		// TODO Auto-generated method stub

	}

	/**
	 * @param text
	 *            text to be inserted
	 */
	public void autocomplete(String text) {
		this.mf.deleteCurrentWord();
		insertString(text);
		if (text.contains("[") || text.contains("(")) {
			mf.selectNextArgument();
			mf.setFocus(true);
		}

	}

	@Override
	public boolean isSVCell() {
		return false;
	}

	@Override
	public void endEditing() {
		mf.blur();

	}

	@Override
	public MathFieldW getField() {
		return mf;
	}

	public void onKeyboardClosed() {
		// TODO Auto-generated method stub

	}

}