archive/net.sourceforge.phpeclipse.monitor.ui/src/net/sourceforge/phpdt/monitor/ui/internal/viewers/ImageViewer.java

   1 /**********************************************************************
   2  * Copyright (c) 2003 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.html
   7  *
   8  * Contributors:
   9  *    IBM - Initial API and implementation
  10  **********************************************************************/
  11 package net.sourceforge.phpdt.monitor.ui.internal.viewers;
  12
  13 import java.io.ByteArrayInputStream;
  14
  15 import net.sourceforge.phpdt.monitor.ui.IContentViewer;
  16 import net.sourceforge.phpdt.monitor.ui.internal.MonitorUIPlugin;
  17
  18 import org.eclipse.swt.SWT;
  19 import org.eclipse.swt.graphics.Image;
  20 import org.eclipse.swt.graphics.ImageData;
  21 import org.eclipse.swt.layout.GridData;
  22 import org.eclipse.swt.layout.GridLayout;
  23 import org.eclipse.swt.widgets.Composite;
  24 import org.eclipse.swt.widgets.Label;
  25
  26 /**
  27  * An image viewer.
  28  */
  29 public class ImageViewer implements IContentViewer {
  30         protected Composite rootComp;
  31         protected Composite viewerComp;
  32         protected Label messageLabel;
  33
  34         /* (non-Javadoc)
  35          * @see net.sourceforge.phpdt.monitor.ui.IContentViewer#init(Composite)
  36          */
  37         public void init(Composite parent) {
  38                 rootComp = parent;
  39
  40                 viewerComp = new Composite(parent, SWT.NONE);
  41                 GridLayout layout = new GridLayout();
  42                 layout.numColumns = 1;
  43                 layout.marginHeight = 0;
  44                 layout.marginWidth = 0;
  45                 viewerComp.setLayout(layout);
  46                 GridData data = new GridData(GridData.FILL_BOTH);
  47                 viewerComp.setLayoutData(data);
  48
  49                 messageLabel = new Label(viewerComp, SWT.NONE);
  50                 messageLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING | GridData.VERTICAL_ALIGN_BEGINNING));
  51         }
  52
  53         /* (non-Javadoc)
  54          * @see net.sourceforge.phpdt.monitor.ui.IContentViewer#setContent()
  55          */
  56         public void setContent(byte[] b) {
  57                 if (b == null || b.length == 0) {
  58                         messageLabel.setText("<" + MonitorUIPlugin.getResource("%imageViewInvalid") + ">");
  59                 } else {
  60                         byte cr = '\r';
  61                         byte lf = '\n';
  62                         int trimFront = 0;
  63                         int trimBack = 0;
  64                         int len = b.length - 1;
  65                         while(b[trimFront] == cr || b[trimFront] == lf)
  66                                 trimFront++;
  67                         while(b[len - trimBack] == cr || b[len - trimBack] == lf)
  68                                 trimBack++;
  69
  70                         if (trimFront + trimBack > 0) {
  71                                 byte[] temp = b;
  72                                 b = new byte[temp.length - trimBack - trimFront];
  73                                 for(int i = trimFront; i < temp.length - trimBack; i++) {
  74                                         b[i - trimFront] = temp[i];
  75                                 }
  76                         }
  77                         try {
  78                                 ImageData imgD = new ImageData(new ByteArrayInputStream(b));
  79                                 Image img = new Image(null, imgD);
  80                                 messageLabel.setImage(img);
  81                         } catch(Exception e) {
  82                                 messageLabel.setText("<" + MonitorUIPlugin.getResource("%imageViewInvalid") + ">");
  83                         }
  84                 }
  85
  86                 viewerComp.layout(true);
  87         }
  88
  89         /* (non-Javadoc)
  90          * @see net.sourceforge.phpdt.monitor.ui.IContentViewer#dispose()
  91          */
  92         public void dispose() {
  93                 viewerComp.dispose();
  94         }
  95 }