--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.chromium.sdk/src/org/chromium/sdk/internal/ScriptImpl.java	Wed Dec 23 17:13:18 2009 -0800
@@ -0,0 +1,182 @@
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.sdk.internal;
+
+import java.util.List;
+
+import org.chromium.sdk.Script;
+import org.chromium.sdk.internal.protocol.data.ScriptHandle;
+import org.chromium.sdk.internal.protocol.data.SomeHandle;
+import org.chromium.sdk.internal.protocolparser.JsonProtocolParseException;
+import org.chromium.sdk.internal.tools.v8.V8ProtocolUtil;
+
+/**
+ * An objects that holds data for a "script" which is a part of a resource
+ * loaded into the browser, identified by its original document URL, line offset
+ * in the original document, and the line count this script spans.
+ */
+public class ScriptImpl implements Script {
+
+  /**
+   * An object containing data that uniquely identify a V8 script chunk.
+   */
+  public static class Descriptor {
+    public final Type type;
+
+    public final String name;
+
+    public final int lineOffset;
+
+    public final int endLine;
+
+    public final long id;
+
+    public Descriptor(Type type, long id, String name, int lineOffset, int lineCount) {
+      this.type = type;
+      this.id = id;
+      this.name = name;
+      this.lineOffset = lineOffset;
+      this.endLine = lineOffset + lineCount - 1;
+    }
+
+    @Override
+    public int hashCode() {
+      return
+          name != null ? name.hashCode() : (int) id * 0x101 +
+          lineOffset * 0x1001 +
+          endLine * 0x10001;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+      if (obj == this) {
+        return true;
+      }
+      if (!(obj instanceof Descriptor)) {
+        return false;
+      }
+      Descriptor that = (Descriptor) obj;
+      // The id equality is stronger than the name equality.
+      return this.id == that.id &&
+          this.lineOffset == that.lineOffset &&
+          this.endLine == that.endLine;
+    }
+
+    public static Descriptor forResponse(ScriptHandle script, List<SomeHandle> refs,
+        V8ContextFilter contextFilter) {
+      script = V8ProtocolUtil.validScript(script, refs, contextFilter);
+      if (script == null) {
+        return null;
+      }
+      String name = script.name();
+      try {
+        Long scriptType = script.scriptType();
+        Type type = V8ProtocolUtil.getScriptType(scriptType);
+        if (type == null) {
+          return null;
+        }
+        int lineOffset = (int) script.lineOffset();
+        int lineCount = (int) script.lineCount();
+        int id = V8ProtocolUtil.getScriptIdFromResponse(script).intValue();
+        return new Descriptor(type, id, name, lineOffset, lineCount);
+      } catch (Exception e) {
+        // not a script object has been passed in
+        return null;
+      }
+    }
+  }
+
+  private final Descriptor descriptor;
+
+  private String source;
+
+  /**
+   * @param descriptor of the script retrieved from a "scripts" response
+   */
+  public ScriptImpl(Descriptor descriptor) {
+    this.descriptor = descriptor;
+    this.source = null;
+  }
+
+  public Type getType() {
+    return this.descriptor.type;
+  }
+
+  public String getName() {
+    return descriptor.name;
+  }
+
+  public int getStartLine() {
+    return descriptor.lineOffset;
+  }
+
+  public int getEndLine() {
+    return descriptor.endLine;
+  }
+
+  public long getId() {
+    return descriptor.id;
+  }
+
+  public String getSource() {
+    return source;
+  }
+
+  public boolean hasSource() {
+    return source != null;
+  }
+
+  public void setSource(String source) {
+    this.source = source;
+  }
+
+  @Override
+  public int hashCode() {
+    return
+        descriptor.hashCode() * 0x101 +
+        (hasSource() ? (source.hashCode() * 0x1001) : 0);
+  }
+
+  @Override
+  public boolean equals(Object obj) {
+    if (this == obj) {
+      return true;
+    }
+    if (!(obj instanceof ScriptImpl)) {
+      return false;
+    }
+    ScriptImpl that = (ScriptImpl) obj;
+    return this.descriptor.equals(that.descriptor) && eq(this.source, that.source);
+  }
+
+  private static boolean eq(Object left, Object right) {
+    return left == right || (left != null && left.equals(right));
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("[Script (").append(hasSource()
+        ? "has"
+        : "no").append(" source): name=").append(getName()).append(", lineRange=[").append(
+        getStartLine()).append(';').append(getEndLine()).append("]]");
+    return sb.toString();
+  }
+
+  public static Long getScriptId(HandleManager handleManager, long scriptRef) {
+    SomeHandle handle = handleManager.getHandle(scriptRef);
+    if (handle == null) {
+      return -1L; // not found
+    }
+    ScriptHandle scriptHandle;
+    try {
+      scriptHandle = handle.asScriptHandle();
+    } catch (JsonProtocolParseException e) {
+      throw new RuntimeException(e);
+    }
+    return scriptHandle.id();
+  }
+
+}