//
// $Id$
// From Philippe Le Hegaret (Philippe.Le_Hegaret@sophia.inria.fr)
//
// (c) COPYRIGHT MIT and INRIA, 1997.
// Please first read the full copyright statement in file COPYRIGHT.html
package org.w3c.css.properties.atsc;

import org.w3c.css.parser.CssSelectors;
import org.w3c.css.parser.CssStyle;
import org.w3c.css.properties.css.CssProperty;
import org.w3c.css.util.ApplContext;
import org.w3c.css.util.InvalidParamException;
import org.w3c.css.values.CssExpression;
import org.w3c.css.values.CssOperator;

/**
 * <H4>
 * &nbsp;&nbsp; 'border-width'
 * </H4>
 * <p/>
 * <EM>Value:</EM> [thin | medium | thick | &lt;length&gt;]{1,4}<BR>
 * <EM>Initial:</EM> not defined for shorthand properties<BR>
 * <EM>Applies to:</EM> all elements<BR>
 * <EM>Inherited:</EM> no<BR>
 * <EM>Percentage values:</EM> N/A<BR>
 * <p/>
 * This property is a shorthand property for setting 'border-width-top',
 * 'border-width-right', 'border-width-bottom' and 'border-width-left' at the
 * same place in the style sheet.
 * <p/>
 * There can be from one to four values, with the following interpretation:
 * <UL>
 * <LI>
 * one value: all four border widths are set to that value
 * <LI>
 * two values: top and bottom border widths are set to the first value, right
 * and left are set to the second
 * <LI>
 * three values: top is set to the first, right and left are set to the second,
 * bottom is set to the third
 * <LI>
 * four values: top, right, bottom and left, respectively
 * </UL>
 * <p/>
 * In the examples below, the comments indicate the resulting widths of the
 * top, right, bottom and left borders:
 * <PRE>
 * H1 { border-width: thin }                   / * thin thin thin thin * /
 * H1 { border-width: thin thick }             / * thin thick thin thick * /
 * H1 { border-width: thin thick medium }      / * thin thick medium thin * /
 * H1 { border-width: thin thick medium 12cm } / * thin thick medium 12cm * /
 * </PRE>
 * <p/>
 * Border widths cannot be negative.
 *
 * @version $Revision$
 */
public class CssBorderWidthATSC extends CssProperty implements CssOperator {

    CssBorderTopWidthATSC top;
    CssBorderBottomWidthATSC bottom;
    CssBorderRightWidthATSC right;
    CssBorderLeftWidthATSC left;

    /**
     * Create a new CssBorderWidthATSC
     */
    public CssBorderWidthATSC(CssBorderTopWidthATSC top,
                              CssBorderBottomWidthATSC bottom,
                              CssBorderRightWidthATSC right,
                              CssBorderLeftWidthATSC left) {
        this.top = top;
        this.bottom = bottom;
        this.left = left;
        this.right = right;
    }

    /**
     * Create a new CssBorderATSC
     *
     * @param expression The expression for this property
     * @throws InvalidParamException Values are incorrect
     */
    public CssBorderWidthATSC(ApplContext ac, CssExpression expression,
                              boolean check) throws InvalidParamException {

        setByUser();
        switch (expression.getCount()) {
            case 1:
                top = new CssBorderTopWidthATSC(ac, expression);
        /*bottom = new CssBorderBottomWidthATSC((CssBorderFaceWidthATSC) top.get());
	    right = new CssBorderRightWidthATSC((CssBorderFaceWidthATSC) top.get());
	    left = new CssBorderLeftWidthATSC((CssBorderFaceWidthATSC) top.get());*/
                break;
            case 2:
                if (expression.getOperator() != SPACE)
                    throw new InvalidParamException("operator",
                            Character.toString(expression.getOperator()), ac);
                if (expression.getValue().equals(inherit)) {
                    throw new InvalidParamException("unrecognize", ac);
                }
                top = new CssBorderTopWidthATSC(ac, expression);
                if (expression.getValue().equals(inherit)) {
                    throw new InvalidParamException("unrecognize", ac);
                }
                right = new CssBorderRightWidthATSC(ac, expression);
	    /*bottom = new CssBorderBottomWidthATSC((CssBorderFaceWidthATSC) top.get());
	    left = new CssBorderLeftWidthATSC((CssBorderFaceWidthATSC) right.get());*/
                break;
            case 3:
                if (expression.getOperator() != SPACE)
                    throw new InvalidParamException("operator",
                            Character.toString(expression.getOperator()),
                            ac);
                if (expression.getValue().equals(inherit)) {
                    throw new InvalidParamException("unrecognize", ac);
                }
                top = new CssBorderTopWidthATSC(ac, expression);
                if (expression.getOperator() != SPACE)
                    throw new InvalidParamException("operator",
                            Character.toString(expression.getOperator()),
                            ac);
                if (expression.getValue().equals(inherit)) {
                    throw new InvalidParamException("unrecognize", ac);
                }
                right = new CssBorderRightWidthATSC(ac, expression);
                if (expression.getValue().equals(inherit)) {
                    throw new InvalidParamException("unrecognize", ac);
                }
                bottom = new CssBorderBottomWidthATSC(ac, expression);
                //left = new CssBorderLeftWidthATSC((CssBorderFaceWidthATSC) right.get());
                break;
            case 4:
                if (expression.getOperator() != SPACE)
                    throw new InvalidParamException("operator",
                            Character.toString(expression.getOperator()), ac);
                if (expression.getValue().equals(inherit)) {
                    throw new InvalidParamException("unrecognize", ac);
                }
                top = new CssBorderTopWidthATSC(ac, expression);
                if (expression.getOperator() != SPACE)
                    throw new InvalidParamException("operator",
                            Character.toString(expression.getOperator()), ac);
                if (expression.getValue().equals(inherit)) {
                    throw new InvalidParamException("unrecognize", ac);
                }
                right = new CssBorderRightWidthATSC(ac, expression);
                if (expression.getOperator() != SPACE)
                    throw new InvalidParamException("operator",
                            Character.toString(expression.getOperator()), ac);
                if (expression.getValue().equals(inherit)) {
                    throw new InvalidParamException("unrecognize", ac);
                }
                bottom = new CssBorderBottomWidthATSC(ac, expression);
                if (expression.getValue().equals(inherit)) {
                    throw new InvalidParamException("unrecognize", ac);
                }
                left = new CssBorderLeftWidthATSC(ac, expression);
                break;
            default:
                if (check) {
                    throw new InvalidParamException("unrecognize", ac);
                }
        }
    }

    public CssBorderWidthATSC(ApplContext ac, CssExpression expression)
            throws InvalidParamException {
        this(ac, expression, false);
    }

    /**
     * Returns the value of this property
     */
    public Object get() {
        return top;
    }

    /**
     * Returns the name of this property
     */
    public String getPropertyName() {
        return "border-width";
    }

    /**
     * Returns a string representation of the object.
     */
    public String toString() {
        String result = "";
        // top should never be null
        if (top != null) result += top;
        if (right != null) result += " " + right;
        if (bottom != null) result += " " + bottom;
        if (left != null) result += " " + left;
        return result;
	/*if (right.face.equals(left.face)) {
	    if (top.face.equals(bottom.face)) {
		if (top.face.equals(right.face)) {
		    return top.toString();
		} else {
		    return top + " " + right;
		}
	    } else {
		return top + " " + right + " " + bottom;
	    }
	} else {
	    return top + " " + right + " " + bottom + " " + left;
	}*/
    }

    /**
     * Set this property to be important.
     * Overrides this method for a macro
     */
    public void setImportant() {
        if (top != null) {
            top.setImportant();
        }
        if (right != null) {
            right.setImportant();
        }
        if (left != null) {
            left.setImportant();
        }
        if (bottom != null) {
            bottom.setImportant();
        }
    }

    /**
     * Returns true if this property is important.
     * Overrides this method for a macro
     */
    public boolean getImportant() {
        return ((top == null || top.getImportant()) &&
                (right == null || right.getImportant()) &&
                (left == null || left.getImportant()) &&
                (bottom == null || bottom.getImportant()));
    }

    /**
     * Set the context.
     * Overrides this method for a macro
     *
     * @see org.w3c.css.css.CssCascadingOrder#order
     * @see org.w3c.css.css.StyleSheetParser#handleRule
     */
    public void setSelectors(CssSelectors selector) {
        super.setSelectors(selector);
        if (top != null) {
            top.setSelectors(selector);
        }
        if (right != null) {
            right.setSelectors(selector);
        }
        if (bottom != null) {
            bottom.setSelectors(selector);
        }
        if (left != null) {
            left.setSelectors(selector);
        }
    }

    /**
     * Add this property to the CssStyle
     *
     * @param style The CssStyle
     */
    public void addToStyle(ApplContext ac, CssStyle style) {
        if (top != null) {
            top.addToStyle(ac, style);
        }
        if (right != null) {
            right.addToStyle(ac, style);
        }
        if (left != null) {
            left.addToStyle(ac, style);
        }
        if (bottom != null) {
            bottom.addToStyle(ac, style);
        }
    }

    /**
     * Get this property in the style.
     *
     * @param style   The style where the property is
     * @param resolve if true, resolve the style to find this property
     */
    public CssProperty getPropertyInStyle(CssStyle style, boolean resolve) {
        throw new IllegalStateException("Can't invoke this method on the property " +
                getPropertyName());
    }

    /**
     * Update the source file and the line.
     * Overrides this method for a macro
     *
     * @param line   The line number where this property is defined
     * @param source The source file where this property is defined
     */
    public void setInfo(int line, String source) {
        super.setInfo(line, source);
        if (top != null) {
            top.setInfo(line, source);
        }
        if (right != null) {
            right.setInfo(line, source);
        }
        if (left != null) {
            left.setInfo(line, source);
        }
        if (bottom != null) {
            bottom.setInfo(line, source);
        }
    }

    /**
     * Compares two properties for equality.
     *
     * @param value The other property.
     */
    public boolean equals(CssProperty property) {
        return false;
    }

}