1 // Copyright (c) 2009 The Chromium Authors. All rights reserved.

     2 // Use of this source code is governed by a BSD-style license that can be

     3 // found in the LICENSE file.

     4 

     5 package org.chromium.debug.core.model;

     6 

     7 import org.chromium.debug.core.ChromiumDebugPlugin;

     8 import org.chromium.debug.core.util.JsValueStringifier;

     9 import org.chromium.sdk.JsArray;

    10 import org.chromium.sdk.JsValue;

    11 import org.eclipse.core.runtime.IStatus;

    12 import org.eclipse.core.runtime.Status;

    13 import org.eclipse.debug.core.DebugException;

    14 import org.eclipse.debug.core.model.IValue;

    15 import org.eclipse.debug.core.model.IVariable;

    16 

    17 /**

    18  * A generic (non-array) implementation of IValue using a JsValue instance.

    19  */

    20 public class Value extends DebugElementImpl implements IValue {

    21 

    22   private static final IVariable[] EMPTY_VARIABLES = new IVariable[0];

    23 

    24   private final JsValue value;

    25 

    26   private IVariable[] variables;

    27 

    28   public static Value create(IChromiumDebugTarget debugTarget, JsValue value) {

    29     if (JsValue.Type.TYPE_ARRAY == value.getType()) {

    30       return new ArrayValue(debugTarget, (JsArray) value);

    31     }

    32     return new Value(debugTarget, value);

    33   }

    34 

    35   Value(IChromiumDebugTarget debugTarget, JsValue value) {

    36     super(debugTarget);

    37     this.value = value;

    38   }

    39 

    40   public String getReferenceTypeName() throws DebugException {

    41     return value.getType().toString();

    42   }

    43 

    44   public String getValueString() throws DebugException {

    45     String valueText = JsValueStringifier.toVisibleString(value);

    46     if (value.asObject() != null) {

    47       String ref = value.asObject().getRefId();

    48       if (ref != null) {

    49         valueText = valueText + "  (id=" + ref + ")";

    50       }

    51     }

    52     return valueText;

    53   }

    54 

    55   public IVariable[] getVariables() throws DebugException {

    56     try {

    57       if (variables == null) {

    58         if (value.asObject() != null) {

    59           variables = StackFrame.wrapVariables(getDebugTarget(), value.asObject().getProperties(),

    60               value.asObject().getInternalProperties());

    61         } else {

    62           variables = EMPTY_VARIABLES;

    63         }

    64       }

    65       return variables;

    66     } catch (RuntimeException e) {

    67       // We shouldn't throw RuntimeException from here, because calling

    68       // ElementContentProvider#update will forget to call update.done().

    69       throw new DebugException(new Status(IStatus.ERROR, ChromiumDebugPlugin.PLUGIN_ID,

    70           "Failed to read variables", e)); //$NON-NLS-1$

    71     }

    72   }

    73 

    74   public boolean hasVariables() throws DebugException {

    75     return value.asObject() != null;

    76   }

    77 

    78   public boolean isAllocated() throws DebugException {

    79     return false;

    80   }

    81 

    82   public JsValue getJsValue() {

    83     return value;

    84   }

    85 

    86 }