Examples of org.apache.fop.datatypes.Numeric

org.apache.fop.datatypes.Numeric
An interface for classes that can participate in numeric operations. All the numeric operation (+, -, *, ...) are expressed in terms of this Numeric interface. Numerics has a value (getNumericValue) and a dimension (getDimension). Numerics can be either absolute or relative. Relative numerics must be resolved against base value before the value can be used.
To support relative numerics internally in the expresion parser and during evaulation one additional methods exists: isAbsolute() which return true for absolute numerics and false for relative numerics.

     * @see SpaceProperty.Maker#convertProperty(Property, PropertyList, FObj)
     */
    public Property convertProperty(Property p,
            PropertyList propertyList,
            FObj fo) throws PropertyException {
        Numeric numval = p.getNumeric();
        if (numval != null && numval.getDimension() == 0) {
            p = new PercentLength(numval.getNumericValue(), getPercentBase(propertyList));
            Property spaceProp = super.convertProperty(p, propertyList, fo);
            spaceProp.setSpecifiedValue(String.valueOf(numval.getNumericValue()));
            return spaceProp;
        }
        return super.convertProperty(p, propertyList, fo);
    }

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     * @return the absolute value of the input
     * @throws PropertyException for non-numeric input
     */
    public Property eval(Property[] args,
                         PropertyInfo propInfo) throws PropertyException {
        Numeric num = args[0].getNumeric();
        if (num == null) {
            throw new PropertyException("Non numeric operand to abs function");
        }
        // TODO: What if it has relative components (percent, table-col units)?
        return (Property) NumericOp.abs(num);

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     * @return the minimum of the two args elements passed
     * @throws PropertyException for invalid operands
     */
    public Property eval(Property[] args,
                         PropertyInfo pInfo) throws PropertyException {
        Numeric n1 = args[0].getNumeric();
        Numeric n2 = args[1].getNumeric();
        if (n1 == null || n2 == null) {
            throw new PropertyException("Non numeric operands to min function");
        }
        return (Property) NumericOp.min(n1, n2);
       }

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     * @return numeric object containing the calculated body-start value
     * @throws PropertyException if called from outside of an fo:list-item
     */
    public Property eval(Property[] args,
                         PropertyInfo pInfo) throws PropertyException {
        Numeric distance =
            pInfo.getPropertyList().get(Constants.PR_PROVISIONAL_DISTANCE_BETWEEN_STARTS).getNumeric();


        PropertyList pList = pInfo.getPropertyList();
        while (pList != null && !(pList.getFObj() instanceof ListItem)) {
            pList = pList.getParentPropertyList();
        }
        if (pList == null) {
            throw new PropertyException("body-start() called from outside an fo:list-item");
        }


        Numeric startIndent = pList.get(Constants.PR_START_INDENT).getNumeric();


        return (Property) NumericOp.addition(distance, startIndent);
    }

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        LengthBase base = new LengthBase(pInfo.getPropertyList(),
                                         LengthBase.CONTAINING_REFAREA_WIDTH);
        PercentLength refWidth = new PercentLength(1.0, base);


        Numeric labelEnd = distance; 
        labelEnd = NumericOp.addition(labelEnd, startIndent);
        //TODO add start-intrusion-adjustment
        labelEnd = NumericOp.subtraction(labelEnd, separation);
        
        labelEnd = NumericOp.subtraction(refWidth, labelEnd);

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     * @return the maximum of the two args elements passed
     * @throws PropertyException for invalid operands
     */
    public Property eval(Property[] args,
                         PropertyInfo pInfo) throws PropertyException {
        Numeric n1 = args[0].getNumeric();
        Numeric n2 = args[1].getNumeric();
        if (n1 == null || n2 == null) {
            throw new PropertyException("Non numeric operands to max function");
        }
        return (Property) NumericOp.max(n1, n2);
    }

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                                                fontStretch, 
                                                fontStyle, 
                                                fontVariant, 
                                                fontWeight);
        
        Numeric fontSizeAdjust = pList.get(Constants.PR_FONT_SIZE_ADJUST).getNumeric();
        Length fontSize = pList.get(Constants.PR_FONT_SIZE).getLength();
        CommonFont cf = new CommonFont(cachedCommonFont, fontSize, fontSizeAdjust);
        if (fontSize.isAbsolute() && fontSizeAdjust.isAbsolute()) {
            return cache.fetch(cf);
        } else {
            return cf;
        }

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        if (pList == null) {
            return null;
        }
        // Calculate the values as described in 5.3.2.


        Numeric padding = getCorresponding(paddingCorresponding, propertyList).getNumeric();
        Numeric border = getCorresponding(borderWidthCorresponding, propertyList).getNumeric();
        
        int marginProp = pList.getWritingMode(lr_tb, rl_tb, tb_rl);
        // Calculate the absolute margin.
        if (propertyList.getExplicitOrShorthand(marginProp) == null) {
            Property indent = propertyList.getExplicit(baseMaker.propId);
            if (indent == null) {
                //Neither indent nor margin is specified, use inherited
                return null;
            } else {
                //Use explicit indent directly
                return indent;
            }
        } else {
            //Margin is used
            Numeric margin = propertyList.get(marginProp).getNumeric();
            
            Numeric v = FixedLength.ZERO_FIXED_LENGTH;
            if (!propertyList.getFObj().generatesReferenceAreas()) {
                // The inherited_value_of([start|end]-indent)
                v = NumericOp.addition(v, propertyList.getInherited(baseMaker.propId).getNumeric());
            }
            // The corresponding absolute margin-[right|left}.

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            return null;
        }


        // Calculate the values as described in 5.3.2.


        Numeric padding = getCorresponding(paddingCorresponding, propertyList).getNumeric();
        Numeric border = getCorresponding(borderWidthCorresponding, propertyList).getNumeric();
        
        int marginProp = pList.getWritingMode(lr_tb, rl_tb, tb_rl);


        //Determine whether the nearest anscestor indent was specified through 
        //start-indent|end-indent or through a margin property.
        boolean marginNearest = false;
        PropertyList pl = propertyList.getParentPropertyList();
        while (pl != null) {
            if (pl.getExplicit(baseMaker.propId) != null) {
                break;
            } else if (pl.getExplicitOrShorthand(marginProp) != null) {
                marginNearest = true;
                break;
            }
            pl = pl.getParentPropertyList();
        }
        
        // Calculate the absolute margin.
        if (propertyList.getExplicitOrShorthand(marginProp) == null) {
            Property indent = propertyList.getExplicit(baseMaker.propId);
            if (indent == null) {
                //Neither start-indent nor margin is specified, use inherited
                if (isInherited(propertyList) || !marginNearest) {
                    return null;
                } else {
                    return FixedLength.ZERO_FIXED_LENGTH;
                }
            } else {
                return indent;
            }
        } else {
            //Margin is used
            Numeric margin = propertyList.get(marginProp).getNumeric();
            
            Numeric v = FixedLength.ZERO_FIXED_LENGTH;
            if (isInherited(propertyList)) {
                // The inherited_value_of([start|end]-indent)
                v = NumericOp.addition(v, propertyList.getInherited(baseMaker.propId).getNumeric());
            }
            // The corresponding absolute margin-[right|left}.

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     * {@inheritDoc} 
     */
    public Property convertProperty(Property p,
            PropertyList propertyList,
            FObj fo) throws PropertyException {
        Numeric numval = p.getNumeric();
        if (numval != null && numval.getDimension() == 0) {
            if (getPercentBase(propertyList) instanceof LengthBase) {
                Length base = ((LengthBase)getPercentBase(propertyList)).getBaseLength();
                if (base != null && base.isAbsolute()) {
                    p = FixedLength.getInstance(
                            numval.getNumericValue() * base.getNumericValue());
                } else {
                    p = new PercentLength(
                            numval.getNumericValue(), getPercentBase(propertyList));
                }
            }
            Property spaceProp = super.convertProperty(p, propertyList, fo);
            spaceProp.setSpecifiedValue(String.valueOf(numval.getNumericValue()));
            return spaceProp;
        }
        return super.convertProperty(p, propertyList, fo);
    }

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Related Classes of org.apache.fop.datatypes.Numeric

org.apache.fop.fo.expr.AbsFunction

org.apache.fop.fo.expr.BodyStartFunction

org.apache.fop.fo.expr.LabelEndFunction

org.apache.fop.fo.expr.MaxFunction

org.apache.fop.fo.expr.MinFunction

org.apache.fop.fo.expr.RelativeNumericProperty

org.apache.fop.fo.properties.CommonFont

org.apache.fop.fo.properties.IndentPropertyMaker

org.apache.fop.fo.properties.LineHeightPropertyMaker

org.apache.fop.fo.properties.PropertyMocks

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