org.mozilla.javascript.CompilerEnvirons Maven / Gradle / Ivy
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/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.javascript;
import java.util.Set;
import org.mozilla.javascript.ast.ErrorCollector;
public class CompilerEnvirons
{
public CompilerEnvirons()
{
errorReporter = DefaultErrorReporter.instance;
languageVersion = Context.VERSION_DEFAULT;
generateDebugInfo = true;
reservedKeywordAsIdentifier = true;
allowMemberExprAsFunctionName = false;
xmlAvailable = true;
optimizationLevel = 0;
generatingSource = true;
strictMode = false;
warningAsError = false;
generateObserverCount = false;
allowSharpComments = false;
}
public void initFromContext(Context cx)
{
setErrorReporter(cx.getErrorReporter());
languageVersion = cx.getLanguageVersion();
generateDebugInfo = (!cx.isGeneratingDebugChanged()
|| cx.isGeneratingDebug());
reservedKeywordAsIdentifier
= cx.hasFeature(Context.FEATURE_RESERVED_KEYWORD_AS_IDENTIFIER);
allowMemberExprAsFunctionName
= cx.hasFeature(Context.FEATURE_MEMBER_EXPR_AS_FUNCTION_NAME);
strictMode
= cx.hasFeature(Context.FEATURE_STRICT_MODE);
warningAsError = cx.hasFeature(Context.FEATURE_WARNING_AS_ERROR);
xmlAvailable
= cx.hasFeature(Context.FEATURE_E4X);
optimizationLevel = cx.getOptimizationLevel();
generatingSource = cx.isGeneratingSource();
activationNames = cx.activationNames;
// Observer code generation in compiled code :
generateObserverCount = cx.generateObserverCount;
}
public final ErrorReporter getErrorReporter()
{
return errorReporter;
}
public void setErrorReporter(ErrorReporter errorReporter)
{
if (errorReporter == null) throw new IllegalArgumentException();
this.errorReporter = errorReporter;
}
public final int getLanguageVersion()
{
return languageVersion;
}
public void setLanguageVersion(int languageVersion)
{
Context.checkLanguageVersion(languageVersion);
this.languageVersion = languageVersion;
}
public final boolean isGenerateDebugInfo()
{
return generateDebugInfo;
}
public void setGenerateDebugInfo(boolean flag)
{
this.generateDebugInfo = flag;
}
public final boolean isReservedKeywordAsIdentifier()
{
return reservedKeywordAsIdentifier;
}
public void setReservedKeywordAsIdentifier(boolean flag)
{
reservedKeywordAsIdentifier = flag;
}
/**
* Extension to ECMA: if 'function <name>' is not followed
* by '(', assume <name> starts a {@code memberExpr}
*/
public final boolean isAllowMemberExprAsFunctionName()
{
return allowMemberExprAsFunctionName;
}
public void setAllowMemberExprAsFunctionName(boolean flag)
{
allowMemberExprAsFunctionName = flag;
}
public final boolean isXmlAvailable()
{
return xmlAvailable;
}
public void setXmlAvailable(boolean flag)
{
xmlAvailable = flag;
}
public final int getOptimizationLevel()
{
return optimizationLevel;
}
public void setOptimizationLevel(int level)
{
Context.checkOptimizationLevel(level);
this.optimizationLevel = level;
}
public final boolean isGeneratingSource()
{
return generatingSource;
}
public boolean getWarnTrailingComma() {
return warnTrailingComma;
}
public void setWarnTrailingComma(boolean warn) {
warnTrailingComma = warn;
}
public final boolean isStrictMode()
{
return strictMode;
}
public void setStrictMode(boolean strict)
{
strictMode = strict;
}
public final boolean reportWarningAsError()
{
return warningAsError;
}
/**
* Specify whether or not source information should be generated.
*
* Without source information, evaluating the "toString" method
* on JavaScript functions produces only "[native code]" for
* the body of the function.
* Note that code generated without source is not fully ECMA
* conformant.
*/
public void setGeneratingSource(boolean generatingSource)
{
this.generatingSource = generatingSource;
}
/**
* @return true iff code will be generated with callbacks to enable
* instruction thresholds
*/
public boolean isGenerateObserverCount() {
return generateObserverCount;
}
/**
* Turn on or off generation of code with callbacks to
* track the count of executed instructions.
* Currently only affects JVM byte code generation: this slows down the
* generated code, but code generated without the callbacks will not
* be counted toward instruction thresholds. Rhino's interpretive
* mode does instruction counting without inserting callbacks, so
* there is no requirement to compile code differently.
* @param generateObserverCount if true, generated code will contain
* calls to accumulate an estimate of the instructions executed.
*/
public void setGenerateObserverCount(boolean generateObserverCount) {
this.generateObserverCount = generateObserverCount;
}
public boolean isRecordingComments() {
return recordingComments;
}
public void setRecordingComments(boolean record) {
recordingComments = record;
}
public boolean isRecordingLocalJsDocComments() {
return recordingLocalJsDocComments;
}
public void setRecordingLocalJsDocComments(boolean record) {
recordingLocalJsDocComments = record;
}
/**
* Turn on or off full error recovery. In this mode, parse errors do not
* throw an exception, and the parser attempts to build a full syntax tree
* from the input. Useful for IDEs and other frontends.
*/
public void setRecoverFromErrors(boolean recover) {
recoverFromErrors = recover;
}
public boolean recoverFromErrors() {
return recoverFromErrors;
}
/**
* Puts the parser in "IDE" mode. This enables some slightly more expensive
* computations, such as figuring out helpful error bounds.
*/
public void setIdeMode(boolean ide) {
ideMode = ide;
}
public boolean isIdeMode() {
return ideMode;
}
public Set getActivationNames() {
return activationNames;
}
public void setActivationNames(Set activationNames) {
this.activationNames = activationNames;
}
/**
* Mozilla sources use the C preprocessor.
*/
public void setAllowSharpComments(boolean allow) {
allowSharpComments = allow;
}
public boolean getAllowSharpComments() {
return allowSharpComments;
}
/**
* Returns a {@code CompilerEnvirons} suitable for using Rhino
* in an IDE environment. Most features are enabled by default.
* The {@link ErrorReporter} is set to an {@link ErrorCollector}.
*/
public static CompilerEnvirons ideEnvirons() {
CompilerEnvirons env = new CompilerEnvirons();
env.setRecoverFromErrors(true);
env.setRecordingComments(true);
env.setStrictMode(true);
env.setWarnTrailingComma(true);
env.setLanguageVersion(170);
env.setReservedKeywordAsIdentifier(true);
env.setIdeMode(true);
env.setErrorReporter(new ErrorCollector());
return env;
}
private ErrorReporter errorReporter;
private int languageVersion;
private boolean generateDebugInfo;
private boolean reservedKeywordAsIdentifier;
private boolean allowMemberExprAsFunctionName;
private boolean xmlAvailable;
private int optimizationLevel;
private boolean generatingSource;
private boolean strictMode;
private boolean warningAsError;
private boolean generateObserverCount;
private boolean recordingComments;
private boolean recordingLocalJsDocComments;
private boolean recoverFromErrors;
private boolean warnTrailingComma;
private boolean ideMode;
private boolean allowSharpComments;
Set activationNames;
}