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A Less CSS compiler written completely in Java (pure Java).
/**
* MIT License (MIT)
*
* Copyright (c) 2014 - 2015 Volker Berlin
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* UT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* @author Volker Berlin
* @license: The MIT license
*/
package com.inet.lib.less;
import java.text.ParsePosition;
import java.util.ArrayList;
/**
* A constant value.
*/
class ValueExpression extends Expression {
private int type;
private double value;
private String unit;
private Operation op;
ValueExpression( LessObject reader, String str ) {
super( reader, str );
}
ValueExpression( JavaScriptExpression expr, Object obj ) {
super( expr, String.valueOf( obj ) );
if( obj instanceof Number ) {
type = NUMBER;
value = ((Number)obj).doubleValue();
unit = "";
}
}
/**
* Create a value expression as parameter for a mixin which not change it value in a different context.
* @param formatter current formatter
* @param expr current expression
* @return a ValueExpression
*/
public static ValueExpression eval( CssFormatter formatter, Expression expr ) {
expr = expr.unpack( formatter ); // unpack to increase the chance to find a ValueExpression
if( expr.getClass() == ValueExpression.class ) {
return (ValueExpression)expr;
}
ValueExpression valueEx = new ValueExpression( expr, expr.stringValue( formatter ) );
valueEx.type = expr.getDataType( formatter );
valueEx.unit = expr.unit( formatter );
switch( valueEx.type ) {
case STRING:
case BOOLEAN:
break; //string is already set
case LIST:
Operation op = valueEx.op = new Operation( expr, ' ' );
ArrayList operants = expr.listValue( formatter ).getOperands();
for( int j = 0; j < operants.size(); j++ ) {
op.addOperand( ValueExpression.eval( formatter, operants.get( j ) ) );
}
break;
default:
valueEx.value = expr.doubleValue( formatter );
}
return valueEx;
}
/**
* {@inheritDoc}
*/
@Override
public void appendTo( CssFormatter formatter ) {
if( type == UNKNOWN ) {
eval( formatter );
}
switch( type ) {
case COLOR:
formatter.appendColor( value, toString() );
break;
case STRING:
SelectorUtils.appendToWithPlaceHolder( formatter, toString(), 0, this );
break;
default:
super.appendTo( formatter );
}
}
/**
* {@inheritDoc}
*/
@Override
public int getDataType( CssFormatter formatter ) {
if( type == UNKNOWN ) {
eval( formatter );
}
return type;
}
/**
* {@inheritDoc}
*/
@Override
public double doubleValue( CssFormatter formatter ) {
if( type == UNKNOWN ) {
eval( formatter );
}
if( type == STRING ) {
throw createException( "Invalid Number: " + toString() );
}
return value;
}
/**
* {@inheritDoc}
*/
@Override
public String unit( CssFormatter formatter ) {
if( type == UNKNOWN ) {
eval( formatter );
}
return unit;
}
/**
* {@inheritDoc}
*/
@Override
public boolean booleanValue( CssFormatter formatter ) {
return Boolean.parseBoolean( toString() );
}
@Override
public Operation listValue( CssFormatter formatter ) {
if( type == LIST ) {
return op;
}
return super.listValue( formatter );
}
/**
* Evaluate the type and value.
*/
private void eval( CssFormatter formatter ) {
try {
String str = toString();
if( str.endsWith( "%" ) ) {
value = Double.parseDouble( str.substring( 0, str.length() - 1 ) );
unit = "%";
type = PERCENT;
return;
}
unit = "";
long rgb;
if( str.startsWith( "#" ) ) {
str = str.substring( 1 );
switch( str.length() ) {
case 3:
rgb = 0;
for( int i = 0; i < 3; i++ ) {
char ch = str.charAt( i );
int digit = Character.digit( ch, 16 );
if( digit < 0 ) {
type = STRING;
return;
}
rgb *= 0x100;
rgb += digit * 17;
rgb *= 0x100;
}
break;
case 6:
rgb = 0;
for( int i = 0; i < 6; i++ ) {
char ch = str.charAt( i++ );
int digit = Character.digit( ch, 16 );
if( digit < 0 ) {
type = STRING;
return;
}
rgb *= 16;
rgb += digit;
ch = str.charAt( i );
digit = Character.digit( ch, 16 );
if( digit < 0 ) {
type = STRING;
return;
}
rgb *= 16;
rgb += digit;
rgb *= 0x100;
}
break;
default:
throw createException( "Invalid Color: " + toString() );
}
} else {
switch( str.toLowerCase() ) {
case "aliceblue":
rgb = 0xf000_f800_ff00L;
break;
case "antiquewhite":
rgb = 0xfa00_eb00_d700L;
break;
case "aqua":
rgb = 0xff00_ff00L;
break;
case "aquamarine":
rgb = 0x7f00_ff00_d400L;
break;
case "azure":
rgb = 0xf000_ff00_ff00L;
break;
case "beige":
rgb = 0xf500_f500_dc00L;
break;
case "bisque":
rgb = 0xff00_e400_c400L;
break;
case "black":
rgb = 0x00;
break;
case "blanchedalmond":
rgb = 0xff00_eb00_cd00L;
break;
case "blue":
rgb = 0xFF00L;
break;
case "blueviolet":
rgb = 0x8a00_2b00_e200L;
break;
case "brown":
rgb = 0xa500_2a00_2a00L;
break;
case "burlywood":
rgb = 0xde00_b800_8700L;
break;
case "cadetblue":
rgb = 0x5f00_9e00_a000L;
break;
case "chartreuse":
rgb = 0x7f00_ff00_0000L;
break;
case "chocolate":
rgb = 0xd200_6900_1e00L;
break;
case "coral":
rgb = 0xff00_7f00_5000L;
break;
case "cornflowerblue":
rgb = 0x6400_9500_ed00L;
break;
case "cornsilk":
rgb = 0xff00_f800_dc00L;
break;
case "crimson":
rgb = 0xdc00_1400_3c00L;
break;
case "cyan":
rgb = 0x0000_ff00_ff00L;
break;
case "darkblue":
rgb = 0x0000_0000_8b00L;
break;
case "darkcyan":
rgb = 0x0000_8b00_8b00L;
break;
case "darkgoldenrod":
rgb = 0xb800_8600_0b00L;
break;
case "darkgray":
case "darkgrey": //British
rgb = 0xa900_a900_a900L;
break;
case "darkgreen":
rgb = 0x0000_6400_0000L;
break;
case "darkkhaki":
rgb = 0xbd00_b700_6b00L;
break;
case "darkmagenta":
rgb = 0x8b00_0000_8b00L;
break;
case "darkolivegreen":
rgb = 0x5500_6b00_2f00L;
break;
case "darkorange":
rgb = 0xff00_8c00_0000L;
break;
case "darkorchid":
rgb = 0x9900_3200_cc00L;
break;
case "darkred":
rgb = 0x8b00_0000_0000L;
break;
case "darksalmon":
rgb = 0xe900_9600_7a00L;
break;
case "darkseagreen":
rgb = 0x8f00_bc00_8f00L;
break;
case "darkslateblue":
rgb = 0x4800_3d00_8b00L;
break;
case "darkslategray":
case "darkslategrey": //British
rgb = 0x2f00_4f00_4f00L;
break;
case "darkturquoise":
rgb = 0x0000_ce00_d100L;
break;
case "darkviolet":
rgb = 0x9400_0000_d300L;
break;
case "deeppink":
rgb = 0xff00_1400_9300L;
break;
case "deepskyblue":
rgb = 0x0000_bf00_ff00L;
break;
case "dimgray":
case "dimgrey": //British
rgb = 0x6900_6900_6900L;
break;
case "dodgerblue":
rgb = 0x1e00_9000_ff00L;
break;
case "firebrick":
rgb = 0xb200_2200_2200L;
break;
case "floralwhite":
rgb = 0xff00_fa00_f000L;
break;
case "forestgreen":
rgb = 0x2200_8b00_2200L;
break;
case "fuchsia":
rgb = 0xff00_0000_ff00L;
break;
case "gainsboro":
rgb = 0xdc00_dc00_dc00L;
break;
case "ghostwhite":
rgb = 0xf800_f800_ff00L;
break;
case "gold":
rgb = 0xff00_d700_0000L;
break;
case "goldenrod":
rgb = 0xda00_a500_2000L;
break;
case "gray":
case "grey": //British
rgb = 0x8000_8000_8000L;
break;
case "green":
rgb = 0x0000_8000_0000L;
break;
case "greenyellow":
rgb = 0xad00_ff00_2f00L;
break;
case "honeydew":
rgb = 0xf000_ff00_f000L;
break;
case "hotpink":
rgb = 0xf000_ff00_f000L;
break;
case "indianred":
rgb = 0xcd00_5c00_5c00L;
break;
case "indigo":
rgb = 0x4b00_0000_8200L;
break;
case "ivory":
rgb = 0xff00_ff00_f000L;
break;
case "khaki":
rgb = 0xf000_e600_8c00L;
break;
case "lavender":
rgb = 0xe600_e600_fa00L;
break;
case "lavenderblush":
rgb = 0xff00_f000_f500L;
break;
case "lawngreen":
rgb = 0x7c00_fc00_0000L;
break;
case "lemonchiffon":
rgb = 0xff00_fa00_cd00L;
break;
case "lightblue":
rgb = 0xad00_d800_e600L;
break;
case "lightcoral":
rgb = 0xf000_8000_8000L;
break;
case "lightcyan":
rgb = 0xe000_ff00_ff00L;
break;
case "lightgoldenrodyellow":
rgb = 0xfa00_fa00_d200L;
break;
case "lightgray":
case "lightgrey": //British
rgb = 0xd300_d300_d300L;
break;
case "lightgreen":
rgb = 0x9000_ee00_9000L;
break;
case "lightpink":
rgb = 0xff00_b600_c100L;
break;
case "lightsalmon":
rgb = 0xff00_a000_7a00L;
break;
case "lightseagreen":
rgb = 0x2000_b200_aa00L;
break;
case "lightskyblue":
rgb = 0x8700_ce00_fa00L;
break;
case "lightslategray":
case "lightslategrey": //British
rgb = 0x7700_8800_9900L;
break;
case "lightsteelblue":
rgb = 0xb000_c400_de00L;
break;
case "lightyellow":
rgb = 0xff00_ff00_e000L;
break;
case "lime":
rgb = 0x0000_ff00_0000L;
break;
case "limegreen":
rgb = 0x3200_cd00_3200L;
break;
case "linen":
rgb = 0xfa00_f000_e600L;
break;
case "magenta":
rgb = 0xff00_0000_ff00L;
break;
case "maroon":
rgb = 0x8000_0000_0000L;
break;
case "mediumaquamarine":
rgb = 0x6600_cd00_aa00L;
break;
case "mediumblue":
rgb = 0x0000_0000_cd00L;
break;
case "mediumorchid":
rgb = 0xba00_5500_d300L;
break;
case "mediumpurple":
rgb = 0x9300_7000_d800L;
break;
case "mediumseagreen":
rgb = 0x3c00_b300_7100L;
break;
case "mediumslateblue":
rgb = 0x7b00_6800_ee00L;
break;
case "mediumspringgreen":
rgb = 0x0000_fa00_9a00L;
break;
case "mediumturquoise":
rgb = 0x4800_d100_cc00L;
break;
case "mediumvioletred":
rgb = 0xc700_1500_8500L;
break;
case "midnightblue":
rgb = 0x1900_1900_7000L;
break;
case "mintcream":
rgb = 0xf500_ff00_fa00L;
break;
case "mistyrose":
rgb = 0xff00_e400_e100L;
break;
case "moccasin":
rgb = 0xff00_e400_b500L;
break;
case "navajowhite":
rgb = 0xff00_de00_ad00L;
break;
case "navy":
rgb = 0x8000L;
break;
case "oldlace":
rgb = 0xfd00_f500_e600L;
break;
case "olive":
rgb = 0x8000_8000_0000L;
break;
case "olivedrab":
rgb = 0x6b00_8e00_2300L;
break;
case "orange":
rgb = 0xff00_a500_0000L;
break;
case "orangered":
rgb = 0xff00_4500_0000L;
break;
case "orchid":
rgb = 0xda00_7000_d600L;
break;
case "palegoldenrod":
rgb = 0xee00_e800_aa00L;
break;
case "palegreen":
rgb = 0x9800_fb00_9800L;
break;
case "paleturquoise":
rgb = 0xaf00_ee00_ee00L;
break;
case "palevioletred":
rgb = 0xd800_7000_9300L;
break;
case "papayawhip":
rgb = 0xff00_ef00_d500L;
break;
case "peachpuff":
rgb = 0xff00_da00_b900L;
break;
case "peru":
rgb = 0xcd00_8500_3f00L;
break;
case "pink":
rgb = 0xff00_c000_cb00L;
break;
case "plum":
rgb = 0xdd00_a000_dd00L;
break;
case "powderblue":
rgb = 0xb000_e000_e600L;
break;
case "purple":
rgb = 0x8000_0000_8000L;
break;
case "red":
rgb = 0xFF00_0000_0000L;
break;
case "rosybrown":
rgb = 0xbc00_8f00_8f00L;
break;
case "royalblue":
rgb = 0x4100_6900_e100L;
break;
case "saddlebrown":
rgb = 0x8b00_4500_1300L;
break;
case "salmon":
rgb = 0xfa00_8000_7200L;
break;
case "sandybrown":
rgb = 0xf400_a400_6000L;
break;
case "seagreen":
rgb = 0x2e00_8b00_5700L;
break;
case "seashell":
rgb = 0xff00_f500_ee00L;
break;
case "sienna":
rgb = 0xa000_5200_2d00L;
break;
case "silver":
rgb = 0xc000_c000_c000L;
break;
case "skyblue":
rgb = 0x8700_ce00_eb00L;
break;
case "slateblue":
rgb = 0x6a00_5a00_cd00L;
break;
case "slategray":
case "slategrey": //British
rgb = 0x7000_8000_9000L;
break;
case "snow":
rgb = 0xff00_fa00_fa00L;
break;
case "springgreen":
rgb = 0x0000_ff00_7f00L;
break;
case "steelblue":
rgb = 0x4600_8200_b400L;
break;
case "tan":
rgb = 0xd200_b400_8c00L;
break;
case "teal":
rgb = 0x0000_8000_8000L;
break;
case "thistle":
rgb = 0xd800_bf00_d800L;
break;
case "tomato":
rgb = 0xff00_6300_4700L;
break;
case "turquoise":
rgb = 0x4000_e000_d000L;
break;
case "violet":
rgb = 0xee00_8200_ee00L;
break;
case "wheat":
rgb = 0xf500_de00_b300L;
break;
case "white":
rgb = 0xFF00_FF00_FF00L;
break;
case "whitesmoke":
rgb = 0xf500_f500_f500L;
break;
case "yellow":
rgb = 0xff00_ff00_0000L;
break;
case "yellowgreen":
rgb = 0x9a00_cd00_3200L;
break;
case "transparent":
value = 0;
type = RGBA;
return;
default:
ParsePosition pos = new ParsePosition( 0 );
Number number = formatter.getFormat().parse( str, pos );
if( number == null ) {
if( str.startsWith( "+" ) ) { // DecimalFormat can not parse an option plus sign
pos.setIndex( 1 );
number = formatter.getFormat().parse( str, pos );
if( number == null ) {
type = STRING;
return;
}
} else {
type = STRING;
return;
}
}
value = number.doubleValue();
if( pos.getIndex() != str.length() ) {
unit = str.substring( pos.getIndex() );
}
type = NUMBER;
return;
}
}
value = Double.longBitsToDouble( ALPHA_1 | rgb );
type = COLOR;
} catch( NumberFormatException e ) {
type = STRING;
}
}
}
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