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   1 /*******************************************************************************
   2  * Copyright (c) 2003, 2004 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 Corporation - initial API and implementation
  10  *******************************************************************************/
  11
  12 package net.sourceforge.phpdt.internal.debug.core.logview;
  13
  14 import java.io.BufferedReader;
  15 import java.io.File;
  16 import java.io.FileNotFoundException;
  17 import java.io.FileReader;
  18 import java.io.IOException;
  19 import java.io.PrintWriter;
  20 import java.io.RandomAccessFile;
  21 import java.io.StringWriter;
  22 import java.lang.reflect.InvocationTargetException;
  23
  24 import net.sourceforge.phpdt.internal.debug.core.PHPDebugCorePlugin;
  25
  26 import org.eclipse.core.runtime.IProgressMonitor;
  27 import org.eclipse.jface.dialogs.Dialog;
  28 import org.eclipse.jface.dialogs.IDialogConstants;
  29 import org.eclipse.jface.dialogs.IDialogSettings;
  30 import org.eclipse.jface.dialogs.ProgressMonitorDialog;
  31 import org.eclipse.jface.operation.IRunnableWithProgress;
  32 import org.eclipse.swt.SWT;
  33 import org.eclipse.swt.graphics.Point;
  34 import org.eclipse.swt.layout.GridData;
  35 import org.eclipse.swt.widgets.Composite;
  36 import org.eclipse.swt.widgets.Control;
  37 import org.eclipse.swt.widgets.Shell;
  38 import org.eclipse.swt.widgets.Text;
  39
  40 /**
  41  * Displays the error log in non-Win32 platforms - see bug 55314.
  42  */
  43 public final class OpenLogDialog extends Dialog {
  44     // input log file
  45     private File logFile;
  46     // location/size configuration
  47     private IDialogSettings dialogSettings;
  48     private Point dialogLocation;
  49     private Point dialogSize;
  50     private int DEFAULT_WIDTH = 750;
  51     private int DEFAULT_HEIGHT = 800;
  52
  53     public OpenLogDialog(Shell parentShell, File logFile) {
  54         super(parentShell);
  55         this.logFile = logFile;
  56         setShellStyle(SWT.DIALOG_TRIM | SWT.RESIZE | SWT.MAX | SWT.MIN | SWT.MODELESS);
  57
  58     }
  59
  60     /*
  61      * (non-Javadoc) Method declared on Window.
  62      */
  63     protected void configureShell(Shell newShell) {
  64         super.configureShell(newShell);
  65         newShell.setText(PHPDebugCorePlugin.getResourceString("OpenLogDialog.title")); //$NON-NLS-1$
  66         readConfiguration();
  67     }
  68
  69     /*
  70      * (non-Javadoc) Method declared on Dialog.
  71      */
  72     protected void createButtonsForButtonBar(Composite parent) {
  73         createButton(parent, IDialogConstants.CLOSE_ID, IDialogConstants.CLOSE_LABEL,
  74                 true);
  75     }
  76
  77     public void create() {
  78         super.create();
  79         // dialog location
  80         if (dialogLocation != null)
  81             getShell().setLocation(dialogLocation);
  82         // dialog size
  83         if (dialogSize != null)
  84             getShell().setSize(dialogSize);
  85         else
  86             getShell().setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
  87         getButton(IDialogConstants.CLOSE_ID).setFocus();
  88     }
  89
  90     /*
  91      * (non-Javadoc) Method declared on Dialog.
  92      */
  93     protected Control createDialogArea(Composite parent) {
  94         Composite outer = (Composite) super.createDialogArea(parent);
  95         Text text = new Text(outer, SWT.MULTI | SWT.BORDER | SWT.READ_ONLY | SWT.V_SCROLL
  96                 | SWT.NO_FOCUS | SWT.H_SCROLL);
  97         text.setBackground(parent.getDisplay().getSystemColor(SWT.COLOR_LIST_BACKGROUND));
  98         GridData gridData = new GridData(GridData.HORIZONTAL_ALIGN_FILL
  99                 | GridData.VERTICAL_ALIGN_FILL);
 100         gridData.grabExcessVerticalSpace = true;
 101         gridData.grabExcessHorizontalSpace = true;
 102         text.setLayoutData(gridData);
 103         text.setText(getLogSummary());
 104         return outer;
 105     }
 106
 107     private String getLogSummary() {
 108         StringWriter out = new StringWriter();
 109         PrintWriter writer = new PrintWriter(out);
 110         if (logFile.length() > LogReader.MAX_FILE_LENGTH) {
 111             readLargeFileWithMonitor(writer);
 112         } else {
 113             readFileWithMonitor(writer);
 114         }
 115         writer.close();
 116         return out.toString();
 117     }
 118
 119     /*
 120      * (non-Javadoc)
 121      *
 122      * @see org.eclipse.jface.dialogs.Dialog#buttonPressed(int)
 123      */
 124     protected void buttonPressed(int buttonId) {
 125         if (buttonId == IDialogConstants.CLOSE_ID) {
 126             storeSettings();
 127             close();
 128         }
 129         super.buttonPressed(buttonId);
 130     }
 131
 132     //--------------- configuration handling --------------
 133     /**
 134      * Stores the current state in the dialog settings.
 135      *
 136      * @since 2.0
 137      */
 138     private void storeSettings() {
 139         writeConfiguration();
 140     }
 141
 142     /**
 143      * Returns the dialog settings object used to share state between several
 144      * event detail dialogs.
 145      *
 146      * @return the dialog settings to be used
 147      */
 148     private IDialogSettings getDialogSettings() {
 149         IDialogSettings settings = PHPDebugCorePlugin.getDefault().getDialogSettings();
 150         dialogSettings = settings.getSection(getClass().getName());
 151         if (dialogSettings == null)
 152             dialogSettings = settings.addNewSection(getClass().getName());
 153         return dialogSettings;
 154     }
 155
 156     /**
 157      * Initializes itself from the dialog settings with the same state as at the
 158      * previous invocation.
 159      */
 160     private void readConfiguration() {
 161         IDialogSettings s = getDialogSettings();
 162         try {
 163             int x = s.getInt("x"); //$NON-NLS-1$
 164             int y = s.getInt("y"); //$NON-NLS-1$
 165             dialogLocation = new Point(x, y);
 166             x = s.getInt("width"); //$NON-NLS-1$
 167             y = s.getInt("height"); //$NON-NLS-1$
 168             dialogSize = new Point(x, y);
 169         } catch (NumberFormatException e) {
 170             dialogLocation = null;
 171             dialogSize = null;
 172         }
 173     }
 174
 175     private void writeConfiguration() {
 176         IDialogSettings s = getDialogSettings();
 177         Point location = getShell().getLocation();
 178         s.put("x", location.x); //$NON-NLS-1$
 179         s.put("y", location.y); //$NON-NLS-1$
 180         Point size = getShell().getSize();
 181         s.put("width", size.x); //$NON-NLS-1$
 182         s.put("height", size.y); //$NON-NLS-1$
 183     }
 184
 185     // reading file within MAX_FILE_LENGTH size
 186     private void readFile(PrintWriter writer) throws FileNotFoundException, IOException {
 187         BufferedReader bReader = new BufferedReader(new FileReader(logFile));
 188         while (bReader.ready())
 189             writer.println(bReader.readLine());
 190     }
 191
 192     // reading large files
 193     private void readLargeFile(PrintWriter writer) throws FileNotFoundException,
 194             IOException {
 195         RandomAccessFile random = null;
 196         boolean hasStarted = false;
 197         try {
 198             random = new RandomAccessFile(logFile, "r"); //$NON-NLS-1$
 199             random.seek(logFile.length() - LogReader.MAX_FILE_LENGTH);
 200             for (;;) {
 201                 String line = random.readLine();
 202                 if (line == null)
 203                     break;
 204                 line = line.trim();
 205                 if (line.length() == 0)
 206                     continue;
 207                 if (!hasStarted
 208                         && (line.startsWith("!ENTRY") || line.startsWith("!SESSION"))) //$NON-NLS-1$ //$NON-NLS-2$
 209                     hasStarted = true;
 210                 if (hasStarted)
 211                     writer.println(line);
 212                 continue;
 213             }
 214         } finally {
 215             try {
 216                 if (random != null)
 217                     random.close();
 218             } catch (IOException e1) {
 219             }
 220         }
 221     }
 222
 223     private void readLargeFileWithMonitor(final PrintWriter writer) {
 224         IRunnableWithProgress runnable = new IRunnableWithProgress() {
 225             public void run(IProgressMonitor monitor) throws InvocationTargetException,
 226                     InterruptedException {
 227                 monitor
 228                         .beginTask(
 229                                 PHPDebugCorePlugin
 230                                         .getResourceString("OpenLogDialog.message"), IProgressMonitor.UNKNOWN); //$NON-NLS-1$
 231                 try {
 232                     readLargeFile(writer);
 233                 } catch (IOException e) {
 234                     writer.println(PHPDebugCorePlugin
 235                             .getResourceString("OpenLogDialog.cannotDisplay")); //$NON-NLS-1$
 236                 }
 237             }
 238         };
 239         ProgressMonitorDialog dialog = new ProgressMonitorDialog(getParentShell());
 240         try {
 241             dialog.run(true, true, runnable);
 242         } catch (InvocationTargetException e) {
 243         } catch (InterruptedException e) {
 244         }
 245     }
 246
 247     private void readFileWithMonitor(final PrintWriter writer) {
 248         IRunnableWithProgress runnable = new IRunnableWithProgress() {
 249             public void run(IProgressMonitor monitor) throws InvocationTargetException,
 250                     InterruptedException {
 251                 monitor
 252                         .beginTask(
 253                                 PHPDebugCorePlugin
 254                                         .getResourceString("OpenLogDialog.message"), IProgressMonitor.UNKNOWN); //$NON-NLS-1$
 255                 try {
 256                     readFile(writer);
 257                 } catch (IOException e) {
 258                     writer.println(PHPDebugCorePlugin
 259                             .getResourceString("OpenLogDialog.cannotDisplay")); //$NON-NLS-1$
 260                 }
 261             }
 262         };
 263         ProgressMonitorDialog dialog = new ProgressMonitorDialog(getParentShell());
 264         try {
 265             dialog.run(true, true, runnable);
 266         } catch (InvocationTargetException e) {
 267         } catch (InterruptedException e) {
 268         }
 269     }
 270 }