org.mortbay.html.Image Maven / Gradle / Ivy
// ========================================================================
// $Id: Image.java,v 1.8 2005/08/13 00:01:23 gregwilkins Exp $
// Copyright 1996-2004 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ========================================================================
package org.mortbay.html;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import org.mortbay.log.Log;
import org.mortbay.util.IO;
/* ---------------------------------------------------------------- */
/** HTML Image Tag.
* @see org.mortbay.html.Block
* @version $Id: Image.java,v 1.8 2005/08/13 00:01:23 gregwilkins Exp $
* @author Greg Wilkins
*/
public class Image extends Tag
{
/* ------------------------------------------------------------ */
public Image(String src)
{
super("img");
attribute("src",src);
}
/* ------------------------------------------------------------ */
/** Construct from GIF file.
*/
public Image(String dirname, String src)
{
super("img");
attribute("src",src);
setSizeFromGif(dirname,src);
}
/* ------------------------------------------------------------ */
/** Construct from GIF file.
*/
public Image(File gif)
{
super("img");
attribute("src",gif.getName());
setSizeFromGif(gif);
}
/* ------------------------------------------------------------ */
public Image(String src,int width, int height, int border)
{
this(src);
width(width);
height(height);
border(border);
}
/* ------------------------------------------------------------ */
public Image border(int b)
{
attribute("border",b);
return this;
}
/* ------------------------------------------------------------ */
public Image alt(String alt)
{
attribute("alt",alt);
return this;
}
/* ------------------------------------------------------------ */
/** Set the image size from the header of a GIF file.
* @param dirname The directory name, expected to be in OS format
* @param pathname The image path name relative to the directory.
* Expected to be in WWW format (i.e. with slashes)
* and will be converted to OS format.
*/
public Image setSizeFromGif(String dirname,
String pathname)
{
String filename =dirname + pathname.replace('/',File.separatorChar);
return setSizeFromGif(filename);
}
/* ------------------------------------------------------------ */
/** Set the image size from the header of a GIF file.
*/
public Image setSizeFromGif(String filename)
{
return setSizeFromGif(new File(filename));
}
/* ------------------------------------------------------------ */
/** Set the image size from the header of a GIF file.
*/
public Image setSizeFromGif(File gif)
{
if (gif.canRead())
{
FileInputStream in = null;
try{
byte [] buf = new byte[10];
in = new FileInputStream(gif);
if (in.read(buf,0,10)==10)
{
if(Log.isDebugEnabled())Log.debug("Image "+gif.getName()+
" is " +
((0x00ff&buf[7])*256+(0x00ff&buf[6])) +
" x " +
(((0x00ff&buf[9])*256+(0x00ff&buf[8]))));
width((0x00ff&buf[7])*256+(0x00ff&buf[6]));
height(((0x00ff&buf[9])*256+(0x00ff&buf[8])));
}
}
catch (IOException e){
Log.ignore(e);
}
finally {
IO.close(in);
}
}
return this;
}
}