// 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.AbstractList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.chromium.sdk.Script;
import org.chromium.sdk.UpdatableScript;
import org.chromium.sdk.internal.liveeditprotocol.LiveEditResult;
/**
* 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 abstract class ScriptBase<ID> implements Script {
/**
* An object containing data that uniquely identify a V8 script chunk.
*/
public static class Descriptor<ID> {
public final Type type;
public final String name;
public final int lineOffset;
public final int columnOffset;
public final int endLine;
public final ID id;
public Descriptor(Type type, ID 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() : id.hashCode() * 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.equals(that.id) &&
this.lineOffset == that.lineOffset &&
this.columnOffset == that.columnOffset &&
this.endLine == that.endLine;
}
}
private final Descriptor<ID> descriptor;
private volatile String source = null;
private volatile boolean isCollected = false;
/**
* @param descriptor of the script retrieved from a "scripts" response
*/
public ScriptBase(Descriptor<ID> descriptor) {
this.descriptor = descriptor;
this.source = null;
}
@Override
public Type getType() {
return this.descriptor.type;
}
@Override
public String getName() {
return descriptor.name;
}
@Override
public int getStartLine() {
return descriptor.lineOffset;
}
@Override
public int getStartColumn() {
return descriptor.columnOffset;
}
@Override
public int getEndLine() {
return descriptor.endLine;
}
@Override
public ID getId() {
return descriptor.id;
}
@Override
public boolean isCollected() {
return isCollected;
}
@Override
public String getSource() {
return source;
}
@Override
public boolean hasSource() {
return source != null;
}
public void setSource(String source) {
this.source = source;
}
public void setCollected() {
isCollected = true;
}
protected static class UpdateResultParser {
public static UpdatableScript.ChangeDescription wrapChangeDescription(
final LiveEditResult previewDescription) {
if (previewDescription == null) {
return null;
}
return new UpdatableScript.ChangeDescription() {
@Override public UpdatableScript.OldFunctionNode getChangeTree() {
return OLD_WRAPPER.wrap(previewDescription.change_tree());
}
@Override public String getCreatedScriptName() {
return previewDescription.created_script_name();
}
@Override public boolean isStackModified() {
return previewDescription.stack_modified();
}
@Override public TextualDiff getTextualDiff() {
final LiveEditResult.TextualDiff protocolTextualData = previewDescription.textual_diff();
if (protocolTextualData == null) {
return null;
}
return new TextualDiff() {
@Override public List<Long> getChunks() {
return protocolTextualData.chunks();
}
};
}
};
}
private static class OldFunctionNodeImpl implements UpdatableScript.OldFunctionNode {
private final LiveEditResult.OldTreeNode treeNode;
private final FunctionPositions positions;
private final FunctionPositions newPositions;
OldFunctionNodeImpl(LiveEditResult.OldTreeNode treeNode) {
this.treeNode = treeNode;
this.positions = wrapPositions(treeNode.positions());
if (treeNode.new_positions() == null) {
this.newPositions = null;
} else {
this.newPositions = wrapPositions(treeNode.new_positions());
}
}
@Override public String getName() {
return treeNode.name();
}
@Override public ChangeStatus getStatus() {
return statusCodes.get(treeNode.status());
}
@Override public String getStatusExplanation() {
return treeNode.status_explanation();
}
@Override public List<? extends OldFunctionNode> children() {
return wrapList(treeNode.children(), OLD_WRAPPER);
}
@Override public List<? extends NewFunctionNode> newChildren() {
return wrapList(treeNode.new_children(), NEW_WRAPPER);
}
@Override public FunctionPositions getPositions() {
return positions;
}
@Override public FunctionPositions getNewPositions() {
return newPositions;
}
@Override public OldFunctionNode asOldFunction() {
return this;
}
}
private static class NewFunctionNodeImpl implements UpdatableScript.NewFunctionNode {
private final LiveEditResult.NewTreeNode treeNode;
private final FunctionPositions positions;
NewFunctionNodeImpl(LiveEditResult.NewTreeNode treeNode) {
this.treeNode = treeNode;
this.positions = wrapPositions(treeNode.positions());
}
@Override public String getName() {
return treeNode.name();
}
@Override public FunctionPositions getPositions() {
return positions;
}
@Override public List<? extends NewFunctionNode> children() {
return wrapList(treeNode.children(), NEW_WRAPPER);
}
@Override public OldFunctionNode asOldFunction() {
return null;
}
}
private static final Wrapper<LiveEditResult.OldTreeNode, OldFunctionNode> OLD_WRAPPER =
new Wrapper<LiveEditResult.OldTreeNode, OldFunctionNode>() {
@Override
OldFunctionNode wrap(LiveEditResult.OldTreeNode original) {
return new OldFunctionNodeImpl(original);
}
};
private static final Wrapper<LiveEditResult.NewTreeNode, NewFunctionNode> NEW_WRAPPER =
new Wrapper<LiveEditResult.NewTreeNode, NewFunctionNode>() {
@Override
NewFunctionNode wrap(LiveEditResult.NewTreeNode original) {
return new NewFunctionNodeImpl(original);
}
};
private static UpdatableScript.FunctionPositions wrapPositions(
final LiveEditResult.Positions rawPositions) {
return new UpdatableScript.FunctionPositions() {
@Override public long getStart() {
return rawPositions.start_position();
}
@Override public long getEnd() {
return rawPositions.end_position();
}
};
}
private static abstract class Wrapper<FROM, TO> {
abstract TO wrap(FROM original);
}
private static <FROM, TO> List<TO> wrapList(final List<? extends FROM> originalList,
final Wrapper<FROM, TO> wrapper) {
return new AbstractList<TO>() {
@Override public TO get(int index) {
return wrapper.wrap(originalList.get(index));
}
@Override public int size() {
return originalList.size();
}
};
}
private static final Map<String, ChangeStatus> statusCodes;
static {
statusCodes = new HashMap<String, ChangeStatus>(5);
statusCodes.put("unchanged", ChangeStatus.UNCHANGED);
statusCodes.put("source changed", ChangeStatus.NESTED_CHANGED);
statusCodes.put("changed", ChangeStatus.CODE_PATCHED);
statusCodes.put("damaged", ChangeStatus.DAMAGED);
}
}
@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 ScriptBase)) {
return false;
}
ScriptBase<?> that = (ScriptBase<?>) 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();
}
}