// This Source Code is in the Public Domain per: http://unlicense.org
package org.litesoft.GWT.client.widgets.datatables;

import org.litesoft.commonfoundation.html.*;
import org.litesoft.commonfoundation.typeutils.*;

import com.google.gwt.user.client.ui.*;

public abstract class AbstractAccordionDetailView<RowType> extends Composite
{
    private String mPrefix = HTMLPanel.createUniqueId();

    private HTMLPanel mImpl;

    protected void initHTML( String pHtml )
    {
        initWidget( mImpl = new HTMLPanel( pHtml ) );
    }

    abstract public void populate( RowType pRowType );

    protected String id( String pID )
    {
        return mPrefix + pID;
    }

    protected void setText( String pID, Object pValue )
    {
        String zText = Objects.toStringOrNull( pValue );
        if ( pValue != null )
        {
            mImpl.getElementById( id( pID ) ).setInnerText( zText );
        }
        else
        {
            /*
             * matg: sets to "&nbsp;" which is guaranteed to reserve space which
             * ensures consistent row height calculation
             */
            setHtml( pID, null );
        }
    }

    protected void setHtml( String pID, Object pValue )
    {
        mImpl.getElementById( id( pID ) ).setInnerHTML( (pValue != null) ? pValue.toString() : HTMLConstants.NBSP );
    }

    protected String table( String... pTRs )
    {
        StringBuilder sb = new StringBuilder().append( "<table width='100%' cellpadding='0' cellspacing='0'>" );
        for ( String zTR : pTRs )
        {
            sb.append( zTR );
        }
        return sb.append( "</table>" ).toString();
    }

    protected String tr( String... pTDs )
    {
        StringBuilder sb = new StringBuilder().append( "<tr>" );
        for ( String zTD : pTDs )
        {
            sb.append( zTD );
        }
        return sb.append( "</tr>" ).toString();
    }

    protected String tdWithID( String pID )
    {
        return td( pID, 1, "" );
    }

    protected String td( String pText )
    {
        return td( 1, pText );
    }

    protected String td( int pColspan, String pText )
    {
        return td( null, pColspan, pText );
    }

    protected String td( String pID, int pColspan, String pText )
    {
        StringBuilder sb = new StringBuilder().append( "<td style='white-space:nowrap;'" );
        if ( pColspan > 1 )
        {
            sb.append( " colspan='" ).append( pColspan ).append( "'" );
        }
        if ( pID != null )
        {
            sb.append( " id='" ).append( id( pID ) ).append( "'" );
        }
        return sb.append( ">" ).append( pText ).append( "</td>" ).toString();
    }

    protected String wrap( String pText, int pMaxCharsPerLength )
    {
        pText = Strings.deNull( pText ).trim();

        StringBuilder sb = new StringBuilder();

        String zPart = getUptoBreakAt( pText, pMaxCharsPerLength );
        sb.append( zPart ).append( "<br>" );
        pText = pText.substring( zPart.length() ).trim();
        zPart = getUptoBreakAt( pText, pMaxCharsPerLength );
        sb.append( zPart ).append( "<br>" );
        pText = pText.substring( zPart.length() ).trim();
        zPart = getUptoBreakAt( pText, pMaxCharsPerLength );
        if ( zPart.length() == 0 )
        {
            sb.append( HTMLConstants.NBSP );
        }
        else
        {
            if ( pText.length() > zPart.length() )
            {
                zPart = zPart.substring( 0, zPart.length() - 3 ) + "...";
            }
            sb.append( zPart );
        }
        return sb.toString();
    }

    private String getUptoBreakAt( String pText, int pMaxCharsPerLength )
    {
        int zBrkAt = pMaxCharsPerLength;
        if ( pText.length() <= zBrkAt )
        {
            return pText;
        }
        while ( (zBrkAt > 0) && (' ' != pText.charAt( zBrkAt )) )
        {
            zBrkAt--;
        }
        return pText.substring( 0, (zBrkAt != 0) ? zBrkAt : pMaxCharsPerLength );
    }
}