package org.daisy.pipeline.css.speech;
   
   import java.util.Map;
   
   import cz.vutbr.web.css.CSSProperty;
   import cz.vutbr.web.css.CSSProperty.Cue;
   import cz.vutbr.web.css.CSSProperty.SpeechRate;
   import cz.vutbr.web.css.CSSProperty.VoiceFamily;
   import cz.vutbr.web.css.Declaration;
  import cz.vutbr.web.css.Term;
  import cz.vutbr.web.css.TermList;
  import cz.vutbr.web.css.TermPercent;
  import cz.vutbr.web.css.TermTime;
  import cz.vutbr.web.css.TermURI;
  import cz.vutbr.web.domassign.DeclarationTransformer;
  
  public class SpeechDeclarationTransformer extends DeclarationTransformer {
  
  	@Override
  	public boolean parseDeclaration(Declaration d, Map<String, CSSProperty> properties, Map<String, Term<?>> values) {
  		String propertyName = d.getProperty().toLowerCase();
  		if ("cue-before".equals(propertyName) || "cue-after".equals(propertyName)) {
  			return genericTerm(TermURI.class, d.get(0), d.getProperty(), Cue.uri, false,
  			                   properties, values);
  		} else if (propertyName.startsWith("pause")) {
  			// jStyleParser doesn't accept pauses with "ms" or "s" at the end
  			Term<?> term = d.get(0);
  			if (!(term instanceof TermTime))
  				return super.parseDeclaration(d, properties, values);
  			properties.put(propertyName, null);
  			values.put(propertyName, term);
  			return true;
  		} else if ("voice-family".equals(propertyName)) {
  			if (d.size() == 0)
  				return false;
  			TermList list = tf.createList();
  			for (Term<?> t : d) {
  				list.add(t);
  			}
  			try {
  				list = VoiceFamilyList.of(list);
  			} catch (IllegalArgumentException e) {
  				return false;
  			}
  			properties.put(d.getProperty(), VoiceFamily.list_values);
  			values.put(d.getProperty(), list);
  			return true;
  		} else if ("speech-rate".equals(propertyName)) {
  			if (d.size() == 1 && d.get(0) instanceof TermPercent) {
  				TermPercent p = (TermPercent)d.get(0);
  				if (p.getValue() <= 0) {
  					return false; // must be non-negative percentage
  				} else {
  					properties.put(d.getProperty(), SpeechRate.number);
  					values.put(d.getProperty(), p);
  					return true;
  				}
  			}
  			return super.parseDeclaration(d, properties, values);
  		} else {
  			return super.parseDeclaration(d, properties, values);
  		}
  	}
  }