litesoft
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// This Source Code is in the Public Domain per: http://unlicense.org package org.litesoft.GWT.client; import org.litesoft.GWT.client.widgets.nonpublic.*; import org.litesoft.commonfoundation.html.*; import org.litesoft.commonfoundation.typeutils.*; import com.google.gwt.user.client.ui.*; import java.util.*; public class FontSizer { public static final String ASCII = " ?!\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~"; public static FontSizer get( String... pStyles ) { if ( null != (pStyles = Strings.noEmpty( pStyles )) ) { if ( pStyles.length > 1 ) { return getComposite( pStyles ); } String zStyle = Strings.noEmpty( pStyles[0] ); if ( zStyle != null ) { return getSingle( zStyle ); } } throw new IllegalStateException( "FontSizer requires at least one Style" ); } public Integer EMs( int pChars ) { Integer zWidth = getAverageCharacterWidth(); return (zWidth != null) ? (pChars * zWidth) : null; } public Integer EMsPlus( int pChars, int pPixels ) { Integer zWidth = getAverageCharacterWidth(); return (zWidth != null) ? ((pChars * zWidth) + pPixels) : null; } public Integer EMsLess( int pChars, int pPixels ) { return EMsPlus( pChars, -pPixels ); } public Integer getAverageCharacterWidth() { return mSizer.getAverageCharacterWidth(); } private interface Sizer { public Integer getAverageCharacterWidth(); } private static class NullSizer implements Sizer { public static final Sizer INSTANCE = new NullSizer(); @Override public Integer getAverageCharacterWidth() { return 0; } } private static class Composite implements Sizer { private Sizer[] mSizers; private Integer mCachedResults = null; private Composite( Sizer[] pSizers ) { mSizers = pSizers; } @Override public Integer getAverageCharacterWidth() { if ( mCachedResults == null ) { int zMax = 4; for ( Sizer zSizer : mSizers ) { Integer zWidth = zSizer.getAverageCharacterWidth(); if ( zWidth == null ) { return null; } zMax = Math.max( zMax, zWidth ); } mCachedResults = zMax; } return mCachedResults; } } private static final class MyLabel extends HTML implements Sizer { private static final String HTML_ASCII = HTMLize.escapeNoWrap( ASCII ); private Integer mCachedResults = null; private MyLabel( String pStyle ) { super( createHTML( pStyle ) ); CommonElementHelper.setOverflowClass( getElement(), true ); setWidth( "4" ); RootPanel.get().add( this ); } private static String createHTML( String pStyle ) { return "<table border='0' cellSpacing='0' cellPadding='0'><tbody><tr><td class='" + pStyle + "' style='white-space:nowrap;'>" + // HTML_ASCII + "</td></tr></tbody></table>"; } @Override public Integer getAverageCharacterWidth() { if ( mCachedResults == null ) { if ( isAttached() ) { int zWidth = getElement().getFirstChildElement().getOffsetWidth(); if ( ASCII.length() <= zWidth ) { mCachedResults = zWidth / ASCII.length(); } else { System.out.println( "FontSizer$MyLabel.getAverageCharacterWidth: " + zWidth ); } } } return mCachedResults; } } private Sizer mSizer; private FontSizer( Sizer pSizer ) { mSizer = pSizer; } private static class CompositeKey { private String[] mStyles; private CompositeKey( String[] pStyles ) { mStyles = pStyles; } @Override public int hashCode() { return Arrays.hashCode( mStyles ); } @Override public boolean equals( Object o ) { return (this == o) || // ((o != null) && (getClass() == o.getClass()) && // Arrays.equals( mStyles, ((CompositeKey) o).mStyles )); } } private static Map<String, FontSizer> STYLE_INSTANCES = new HashMap<String, FontSizer>(); private static FontSizer getSingle( String pStyle ) { FontSizer zFontSizer = STYLE_INSTANCES.get( pStyle ); if ( zFontSizer == null ) { STYLE_INSTANCES.put( pStyle, zFontSizer = new FontSizer( getSizer( pStyle ) ) ); } return zFontSizer; } private static Map<CompositeKey, FontSizer> ARRAY_INSTANCES = new HashMap<CompositeKey, FontSizer>(); private static FontSizer getComposite( String[] pStyles ) { CompositeKey zKey = new CompositeKey( pStyles ); FontSizer zFontSizer = ARRAY_INSTANCES.get( zKey ); if ( zFontSizer == null ) { ARRAY_INSTANCES.put( zKey, zFontSizer = new FontSizer( getSizer( pStyles ) ) ); } return zFontSizer; } private static Map<Object, Sizer> SIZERS = new HashMap<Object, Sizer>(); private static Sizer getSizer( String pStyle ) { if ( pStyle == null ) { return NullSizer.INSTANCE; } Sizer zSizer = SIZERS.get( pStyle ); if ( zSizer == null ) { SIZERS.put( pStyle, zSizer = new MyLabel( pStyle ) ); } return zSizer; } private static Sizer getSizer( String[] pStyles ) // !null & !empty { Sizer zSizer = SIZERS.get( pStyles ); if ( zSizer == null ) { Sizer[] zSizers = new Sizer[pStyles.length]; for ( int i = 0; i < pStyles.length; i++ ) { zSizers[i] = getSizer( pStyles[i] ); } SIZERS.put( pStyles, zSizer = new Composite( zSizers ) ); } return zSizer; } } |
Commits for litesoft/trunk/Java/GWT/Client/src/org/litesoft/GWT/client/FontSizer.java
Revision | Author | Commited | Message |
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948 Diff | GeorgeS | Sat 07 Jun, 2014 23:42:39 +0000 | Jusefuls Formatter Updated to New Code Format |
947 Diff | GeorgeS | Fri 06 Jun, 2014 23:36:56 +0000 | Correct Spelling of package! |
942 Diff | GeorgeS | Mon 02 Jun, 2014 23:41:46 +0000 | Extracting commonfoundation |
939 Diff | GeorgeS | Mon 02 Jun, 2014 21:30:31 +0000 | Extracting commonfoundation |
801 Diff | GeorgeS | Wed 15 Aug, 2012 03:59:02 +0000 | |
151 Diff | GeorgeS | Thu 17 Mar, 2011 04:16:22 +0000 | |
49 Diff | GeorgeS | Mon 12 Apr, 2010 02:59:10 +0000 | License Text |
23 Diff | GeorgeS | Wed 24 Feb, 2010 00:34:32 +0000 | |
2 | GeorgeS | Sun 07 Feb, 2010 12:50:58 +0000 |