| /* |
| |
| Licensed to the Apache Software Foundation (ASF) under one or more |
| contributor license agreements. See the NOTICE file distributed with |
| this work for additional information regarding copyright ownership. |
| The ASF licenses this file to You under the Apache License, Version 2.0 |
| (the "License"); you may not use this file except in compliance with |
| the License. You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| |
| */ |
| package org.apache.batik.css.engine.value; |
| |
| import org.apache.batik.css.engine.CSSContext; |
| import org.apache.batik.css.engine.CSSEngine; |
| import org.apache.batik.css.engine.CSSStylableElement; |
| import org.apache.batik.css.engine.StyleMap; |
| import org.w3c.css.sac.LexicalUnit; |
| import org.w3c.dom.DOMException; |
| import org.w3c.dom.css.CSSPrimitiveValue; |
| import org.w3c.dom.css.CSSValue; |
| |
| /** |
| * This class provides a manager for the property with support for |
| * length values. |
| * |
| * @author <a href="mailto:stephane@hillion.org">Stephane Hillion</a> |
| * @version $Id$ |
| */ |
| public abstract class LengthManager extends AbstractValueManager { |
| |
| /** |
| * precomputed square-root of 2.0 |
| */ |
| static final double SQRT2 = Math.sqrt( 2.0 ); |
| |
| /** |
| * Implements {@link ValueManager#createValue(LexicalUnit,CSSEngine)}. |
| */ |
| public Value createValue(LexicalUnit lu, CSSEngine engine) |
| throws DOMException { |
| switch (lu.getLexicalUnitType()) { |
| case LexicalUnit.SAC_EM: |
| return new FloatValue(CSSPrimitiveValue.CSS_EMS, |
| lu.getFloatValue()); |
| |
| case LexicalUnit.SAC_EX: |
| return new FloatValue(CSSPrimitiveValue.CSS_EXS, |
| lu.getFloatValue()); |
| |
| case LexicalUnit.SAC_PIXEL: |
| return new FloatValue(CSSPrimitiveValue.CSS_PX, |
| lu.getFloatValue()); |
| |
| case LexicalUnit.SAC_CENTIMETER: |
| return new FloatValue(CSSPrimitiveValue.CSS_CM, |
| lu.getFloatValue()); |
| |
| case LexicalUnit.SAC_MILLIMETER: |
| return new FloatValue(CSSPrimitiveValue.CSS_MM, |
| lu.getFloatValue()); |
| |
| case LexicalUnit.SAC_INCH: |
| return new FloatValue(CSSPrimitiveValue.CSS_IN, |
| lu.getFloatValue()); |
| |
| case LexicalUnit.SAC_POINT: |
| return new FloatValue(CSSPrimitiveValue.CSS_PT, |
| lu.getFloatValue()); |
| |
| case LexicalUnit.SAC_PICA: |
| return new FloatValue(CSSPrimitiveValue.CSS_PC, |
| lu.getFloatValue()); |
| |
| case LexicalUnit.SAC_INTEGER: |
| return new FloatValue(CSSPrimitiveValue.CSS_NUMBER, |
| lu.getIntegerValue()); |
| |
| case LexicalUnit.SAC_REAL: |
| return new FloatValue(CSSPrimitiveValue.CSS_NUMBER, |
| lu.getFloatValue()); |
| |
| case LexicalUnit.SAC_PERCENTAGE: |
| return new FloatValue(CSSPrimitiveValue.CSS_PERCENTAGE, |
| lu.getFloatValue()); |
| } |
| throw createInvalidLexicalUnitDOMException(lu.getLexicalUnitType()); |
| } |
| |
| /** |
| * Implements {@link ValueManager#createFloatValue(short,float)}. |
| */ |
| public Value createFloatValue(short type, float floatValue) |
| throws DOMException { |
| switch (type) { |
| case CSSPrimitiveValue.CSS_PERCENTAGE: |
| case CSSPrimitiveValue.CSS_EMS: |
| case CSSPrimitiveValue.CSS_EXS: |
| case CSSPrimitiveValue.CSS_PX: |
| case CSSPrimitiveValue.CSS_CM: |
| case CSSPrimitiveValue.CSS_MM: |
| case CSSPrimitiveValue.CSS_IN: |
| case CSSPrimitiveValue.CSS_PT: |
| case CSSPrimitiveValue.CSS_PC: |
| case CSSPrimitiveValue.CSS_NUMBER: |
| return new FloatValue(type, floatValue); |
| } |
| throw createInvalidFloatTypeDOMException(type); |
| } |
| |
| /** |
| * Implements {@link |
| * ValueManager#computeValue(CSSStylableElement,String,CSSEngine,int,StyleMap,Value)}. |
| */ |
| public Value computeValue(CSSStylableElement elt, |
| String pseudo, |
| CSSEngine engine, |
| int idx, |
| StyleMap sm, |
| Value value) { |
| if (value.getCssValueType() != CSSValue.CSS_PRIMITIVE_VALUE) { |
| return value; |
| } |
| |
| switch (value.getPrimitiveType()) { |
| case CSSPrimitiveValue.CSS_NUMBER: |
| case CSSPrimitiveValue.CSS_PX: |
| return value; |
| |
| case CSSPrimitiveValue.CSS_MM: |
| CSSContext ctx = engine.getCSSContext(); |
| float v = value.getFloatValue(); |
| return new FloatValue(CSSPrimitiveValue.CSS_NUMBER, |
| v / ctx.getPixelUnitToMillimeter()); |
| |
| case CSSPrimitiveValue.CSS_CM: |
| ctx = engine.getCSSContext(); |
| v = value.getFloatValue(); |
| return new FloatValue(CSSPrimitiveValue.CSS_NUMBER, |
| v * 10f / ctx.getPixelUnitToMillimeter()); |
| |
| case CSSPrimitiveValue.CSS_IN: |
| ctx = engine.getCSSContext(); |
| v = value.getFloatValue(); |
| return new FloatValue(CSSPrimitiveValue.CSS_NUMBER, |
| v * 25.4f / ctx.getPixelUnitToMillimeter()); |
| |
| case CSSPrimitiveValue.CSS_PT: |
| ctx = engine.getCSSContext(); |
| v = value.getFloatValue(); |
| return new FloatValue(CSSPrimitiveValue.CSS_NUMBER, |
| v * 25.4f / |
| (72f * ctx.getPixelUnitToMillimeter())); |
| |
| case CSSPrimitiveValue.CSS_PC: |
| ctx = engine.getCSSContext(); |
| v = value.getFloatValue(); |
| return new FloatValue(CSSPrimitiveValue.CSS_NUMBER, |
| (v * 25.4f / |
| (6f * ctx.getPixelUnitToMillimeter()))); |
| |
| case CSSPrimitiveValue.CSS_EMS: |
| sm.putFontSizeRelative(idx, true); |
| |
| v = value.getFloatValue(); |
| int fsidx = engine.getFontSizeIndex(); |
| float fs; |
| fs = engine.getComputedStyle(elt, pseudo, fsidx).getFloatValue(); |
| return new FloatValue(CSSPrimitiveValue.CSS_NUMBER, v * fs); |
| |
| |
| case CSSPrimitiveValue.CSS_EXS: |
| sm.putFontSizeRelative(idx, true); |
| |
| v = value.getFloatValue(); |
| fsidx = engine.getFontSizeIndex(); |
| fs = engine.getComputedStyle(elt, pseudo, fsidx).getFloatValue(); |
| return new FloatValue(CSSPrimitiveValue.CSS_NUMBER, v * fs * 0.5f); |
| |
| case CSSPrimitiveValue.CSS_PERCENTAGE: |
| ctx = engine.getCSSContext(); |
| switch (getOrientation()) { |
| case HORIZONTAL_ORIENTATION: |
| sm.putBlockWidthRelative(idx, true); |
| fs = value.getFloatValue() * ctx.getBlockWidth(elt) / 100f; |
| break; |
| case VERTICAL_ORIENTATION: |
| sm.putBlockHeightRelative(idx, true); |
| fs = value.getFloatValue() * ctx.getBlockHeight(elt) / 100f; |
| break; |
| default: // Both |
| sm.putBlockWidthRelative(idx, true); |
| sm.putBlockHeightRelative(idx, true); |
| double w = ctx.getBlockWidth(elt); |
| double h = ctx.getBlockHeight(elt); |
| fs = (float)(value.getFloatValue() * |
| (Math.sqrt(w * w + h * h) / SQRT2 ) / 100.0); |
| } |
| return new FloatValue(CSSPrimitiveValue.CSS_NUMBER, fs); |
| } |
| return value; |
| } |
| |
| // |
| // Orientation enumeration |
| // |
| protected static final int HORIZONTAL_ORIENTATION = 0; |
| protected static final int VERTICAL_ORIENTATION = 1; |
| protected static final int BOTH_ORIENTATION = 2; |
| |
| /** |
| * Indicates the orientation of the property associated with |
| * this manager. |
| */ |
| protected abstract int getOrientation(); |
| } |