// 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.Collections;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.chromium.sdk.LiveEditDebugEventListener;
import org.chromium.sdk.LiveEditExtension;
import org.chromium.sdk.Script;
import org.chromium.sdk.SyncCallback;
import org.chromium.sdk.UpdatableScript;
import org.chromium.sdk.internal.protocol.ChangeLiveBody;
import org.chromium.sdk.internal.protocol.SuccessCommandResponse;
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.V8CommandCallbackBase;
import org.chromium.sdk.internal.tools.v8.V8CommandProcessor;
import org.chromium.sdk.internal.tools.v8.V8Helper;
import org.chromium.sdk.internal.tools.v8.V8ProtocolUtil;
import org.chromium.sdk.internal.tools.v8.V8Helper.ScriptLoadCallback;
import org.chromium.sdk.internal.tools.v8.request.ChangeLiveMessage;
/**
* 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, UpdatableScript {
/** The class logger. */
private static final Logger LOGGER = Logger.getLogger(ScriptImpl.class.getName());
/**
* 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 columnOffset;
public final int endLine;
public final long id;
public Descriptor(Type type, long id, String name, int lineOffset, int columnOffset,
int lineCount) {
this.type = type;
this.id = id;
this.name = name;
this.lineOffset = lineOffset;
this.columnOffset = columnOffset;
this.endLine = lineOffset + lineCount - 1;
}
@Override
public int hashCode() {
return
name != null ? name.hashCode() : (int) id * 0x101 +
lineOffset * 0x1001 + columnOffset * 0x10001 +
endLine * 0x100001;
}
@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.columnOffset == that.columnOffset &&
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 columnOffset = (int) script.columnOffset();
int lineCount = (int) script.lineCount();
int id = V8ProtocolUtil.getScriptIdFromResponse(script).intValue();
return new Descriptor(type, id, name, lineOffset, columnOffset, lineCount);
} catch (Exception e) {
// not a script object has been passed in
return null;
}
}
}
private final Descriptor descriptor;
private volatile String source = null;
private final DebugSession debugSession;
/**
* @param descriptor of the script retrieved from a "scripts" response
*/
public ScriptImpl(Descriptor descriptor, DebugSession debugSession) {
this.descriptor = descriptor;
this.source = null;
this.debugSession = debugSession;
}
public Type getType() {
return this.descriptor.type;
}
public String getName() {
return descriptor.name;
}
public int getStartLine() {
return descriptor.lineOffset;
}
public int getStartColumn() {
return descriptor.columnOffset;
}
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;
}
public void setSourceOnRemote(String newSource, UpdateCallback callback,
SyncCallback syncCallback) {
V8CommandProcessor.V8HandlerCallback v8Callback = createScriptUpdateCallback(callback);
debugSession.sendMessageAsync(new ChangeLiveMessage(getId(), newSource),
true, v8Callback, syncCallback);
}
private V8CommandProcessor.V8HandlerCallback createScriptUpdateCallback(
final UpdateCallback callback) {
if (callback == null) {
return null;
}
return new V8CommandCallbackBase() {
@Override
public void success(SuccessCommandResponse successResponse) {
ChangeLiveBody body;
try {
body = successResponse.getBody().asChangeLiveBody();
} catch (JsonProtocolParseException e) {
throw new RuntimeException(e);
}
ScriptLoadCallback scriptCallback = new ScriptLoadCallback() {
public void failure(String message) {
LOGGER.log(Level.SEVERE,
"Failed to reload script after LiveEdit script update; " + message);
}
public void success() {
LiveEditDebugEventListener listener =
LiveEditExtension.castToLiveEditListener(debugSession.getDebugEventListener());
if (listener != null) {
listener.scriptContentChanged(ScriptImpl.this);
}
}
};
V8Helper.reloadScriptAsync(debugSession, Collections.singletonList(getId()),
scriptCallback, null);
debugSession.recreateCurrentContext();
callback.success(body.getChangeLog());
}
@Override
public void failure(String message) {
callback.failure(message);
}
};
}
@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();
}
}