package org.greenstone.gsdl3.gs3build.util;

public class HTMLCText implements HTMLObject
{ String text;
  int    start;
  int    end;

  public static final String HTML_TEXT_TYPE = "Text";

  public HTMLCText(String text, int start, int end)
  { this.text  = text;
    this.start = start;
    this.end   = end;
  }

  public String getHTMLType()
  { return HTML_TEXT_TYPE;
  }

  public int startPos()
  { return this.start;
  }

  public int endPos()
  { return this.end;
  }

  public boolean isEmpty()
  { return emptyString(this.text);
  }

  public static boolean emptyString(String s)
  { int c;

    for (c = 0; c < s.length(); c ++)
    { if (s.charAt(c) > 32)
      { return false;
      }
    }
    return true;
  }

  public static StringBuffer cleanString(StringBuffer buffer)
  { int c;
    int w;

    w = 0;	
    for (c = 0; c < buffer.length(); c ++)
    { if (buffer.charAt(c) >= 32)
      { if (buffer.charAt(c) == 32)
	{ if (w > 0 && buffer.charAt(w-1) > 32)
	  { buffer.setCharAt(w, buffer.charAt(c));
	    w ++;
	  }
	}
        else
	{ if (c != w)
	  { buffer.setCharAt(w, buffer.charAt(c));
	  }
	  w ++;
	}
      }
      else
      { if (w > 0 && buffer.charAt(w-1) > 32)
	{ buffer.setCharAt(w,' ');
	  w ++;
	}
      }
    }
    buffer.setLength(w);
    return buffer;
  }

  /**
   * nullString; used by initialisation for checking for
   * non-blank content (ie. text other than just spaces/returns)
   * see constructor (ie HTMLBlockList) methods below for role of
   * this in the larger plan of things
   */
  public boolean nullString()
  { int ch;

    if (text != null)
    { for (ch = 0; ch < text.length(); ch ++)
      { if (text.charAt(ch) > ' ')
	{ return false;
	}
      }
    }
    return true;
  }

  public String toString()
  { return this.text;
  }

  public String toString(boolean cleaned)
  { if (cleaned == false)
    { return toString();
    }
    else
    { return HTMLEntity.decodeText(this.text);
    }
  }
}