org.htmlunit.corejs.javascript.regexp.NativeRegExpCtor Maven / Gradle / Ivy
/* -*- 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.htmlunit.corejs.javascript.regexp;
import org.htmlunit.corejs.javascript.BaseFunction;
import org.htmlunit.corejs.javascript.Context;
import org.htmlunit.corejs.javascript.ScriptRuntime;
import org.htmlunit.corejs.javascript.Scriptable;
import org.htmlunit.corejs.javascript.TopLevel;
import org.htmlunit.corejs.javascript.Undefined;
/**
* This class implements the RegExp constructor native object.
*
* Revision History: Implementation in C by Brendan Eich Initial port to Java by Norris Boyd from
* jsregexp.c version 1.36 Merged up to version 1.38, which included Unicode support. Merged bug
* fixes in version 1.39. Merged JSFUN13_BRANCH changes up to 1.32.2.11
*
* @author Brendan Eich
* @author Norris Boyd
*/
class NativeRegExpCtor extends BaseFunction {
private static final long serialVersionUID = -5733330028285400526L;
NativeRegExpCtor() {}
@Override
public String getFunctionName() {
return "RegExp";
}
@Override
public int getLength() {
return 2;
}
@Override
public int getArity() {
return 2;
}
@Override
public Object call(Context cx, Scriptable scope, Scriptable thisObj, Object[] args) {
if (args.length > 0
&& args[0] instanceof NativeRegExp
&& (args.length == 1 || args[1] == Undefined.instance)) {
return args[0];
}
return construct(cx, scope, args);
}
@Override
public Scriptable construct(Context cx, Scriptable scope, Object[] args) {
NativeRegExp re = NativeRegExpInstantiator.withLanguageVersion(cx.getLanguageVersion());
re.compile(cx, scope, args);
ScriptRuntime.setBuiltinProtoAndParent(re, scope, TopLevel.Builtins.RegExp);
return re;
}
private static RegExpImpl getImpl() {
Context cx = Context.getCurrentContext();
return (RegExpImpl) ScriptRuntime.getRegExpProxy(cx);
}
private static final int Id_multiline = 1,
Id_STAR = 2,
Id_input = 3,
Id_UNDERSCORE = 4,
Id_lastMatch = 5,
Id_AMPERSAND = 6,
Id_lastParen = 7,
Id_PLUS = 8,
Id_leftContext = 9,
Id_BACK_QUOTE = 10,
Id_rightContext = 11,
Id_QUOTE = 12,
DOLLAR_ID_BASE = 12;
private static final int Id_DOLLAR_1 = DOLLAR_ID_BASE + 1,
Id_DOLLAR_2 = DOLLAR_ID_BASE + 2,
Id_DOLLAR_3 = DOLLAR_ID_BASE + 3,
Id_DOLLAR_4 = DOLLAR_ID_BASE + 4,
Id_DOLLAR_5 = DOLLAR_ID_BASE + 5,
Id_DOLLAR_6 = DOLLAR_ID_BASE + 6,
Id_DOLLAR_7 = DOLLAR_ID_BASE + 7,
Id_DOLLAR_8 = DOLLAR_ID_BASE + 8,
Id_DOLLAR_9 = DOLLAR_ID_BASE + 9,
MAX_INSTANCE_ID = DOLLAR_ID_BASE + 9;
@Override
protected int getMaxInstanceId() {
return super.getMaxInstanceId() + MAX_INSTANCE_ID;
}
@Override
protected int findInstanceIdInfo(String s) {
int id;
switch (s) {
case "multiline":
id = Id_multiline;
break;
case "$*":
id = Id_STAR;
break;
case "input":
id = Id_input;
break;
case "$_":
id = Id_UNDERSCORE;
break;
case "lastMatch":
id = Id_lastMatch;
break;
case "$&":
id = Id_AMPERSAND;
break;
case "lastParen":
id = Id_lastParen;
break;
case "$+":
id = Id_PLUS;
break;
case "leftContext":
id = Id_leftContext;
break;
case "$`":
id = Id_BACK_QUOTE;
break;
case "rightContext":
id = Id_rightContext;
break;
case "$'":
id = Id_QUOTE;
break;
case "$1":
id = Id_DOLLAR_1;
break;
case "$2":
id = Id_DOLLAR_2;
break;
case "$3":
id = Id_DOLLAR_3;
break;
case "$4":
id = Id_DOLLAR_4;
break;
case "$5":
id = Id_DOLLAR_5;
break;
case "$6":
id = Id_DOLLAR_6;
break;
case "$7":
id = Id_DOLLAR_7;
break;
case "$8":
id = Id_DOLLAR_8;
break;
case "$9":
id = Id_DOLLAR_9;
break;
default:
id = 0;
break;
}
if (id == 0) return super.findInstanceIdInfo(s);
int attr;
switch (id) {
case Id_multiline:
attr = multilineAttr;
break;
case Id_STAR:
attr = starAttr;
break;
case Id_input:
attr = inputAttr;
break;
case Id_UNDERSCORE:
attr = underscoreAttr;
break;
default:
attr = PERMANENT | READONLY;
break;
}
return instanceIdInfo(attr, super.getMaxInstanceId() + id);
}
@Override
protected String getInstanceIdName(int id) {
int shifted = id - super.getMaxInstanceId();
if (1 <= shifted && shifted <= MAX_INSTANCE_ID) {
switch (shifted) {
case Id_multiline:
return "multiline";
case Id_STAR:
return "$*";
case Id_input:
return "input";
case Id_UNDERSCORE:
return "$_";
case Id_lastMatch:
return "lastMatch";
case Id_AMPERSAND:
return "$&";
case Id_lastParen:
return "lastParen";
case Id_PLUS:
return "$+";
case Id_leftContext:
return "leftContext";
case Id_BACK_QUOTE:
return "$`";
case Id_rightContext:
return "rightContext";
case Id_QUOTE:
return "$'";
}
// Must be one of $1..$9, convert to 0..8
int substring_number = shifted - DOLLAR_ID_BASE - 1;
char[] buf = {'$', (char) ('1' + substring_number)};
return new String(buf);
}
return super.getInstanceIdName(id);
}
@Override
protected Object getInstanceIdValue(int id) {
int shifted = id - super.getMaxInstanceId();
if (1 <= shifted && shifted <= MAX_INSTANCE_ID) {
RegExpImpl impl = getImpl();
Object stringResult;
switch (shifted) {
case Id_multiline:
case Id_STAR:
return ScriptRuntime.wrapBoolean(impl.multiline);
case Id_input:
case Id_UNDERSCORE:
stringResult = impl.input;
break;
case Id_lastMatch:
case Id_AMPERSAND:
stringResult = impl.lastMatch;
break;
case Id_lastParen:
case Id_PLUS:
stringResult = impl.lastParen;
break;
case Id_leftContext:
case Id_BACK_QUOTE:
stringResult = impl.leftContext;
break;
case Id_rightContext:
case Id_QUOTE:
stringResult = impl.rightContext;
break;
default:
{
// Must be one of $1..$9, convert to 0..8
int substring_number = shifted - DOLLAR_ID_BASE - 1;
stringResult = impl.getParenSubString(substring_number);
break;
}
}
return (stringResult == null) ? "" : stringResult.toString();
}
return super.getInstanceIdValue(id);
}
@Override
protected void setInstanceIdValue(int id, Object value) {
int shifted = id - super.getMaxInstanceId();
switch (shifted) {
case Id_multiline:
case Id_STAR:
getImpl().multiline = ScriptRuntime.toBoolean(value);
return;
case Id_input:
case Id_UNDERSCORE:
getImpl().input = ScriptRuntime.toString(value);
return;
case Id_lastMatch:
case Id_AMPERSAND:
case Id_lastParen:
case Id_PLUS:
case Id_leftContext:
case Id_BACK_QUOTE:
case Id_rightContext:
case Id_QUOTE:
return;
default:
int substring_number = shifted - DOLLAR_ID_BASE - 1;
if (0 <= substring_number && substring_number <= 8) {
return;
}
}
super.setInstanceIdValue(id, value);
}
@Override
protected void setInstanceIdAttributes(int id, int attr) {
int shifted = id - super.getMaxInstanceId();
switch (shifted) {
case Id_multiline:
multilineAttr = attr;
return;
case Id_STAR:
starAttr = attr;
return;
case Id_input:
inputAttr = attr;
return;
case Id_UNDERSCORE:
underscoreAttr = attr;
return;
case Id_lastMatch:
case Id_AMPERSAND:
case Id_lastParen:
case Id_PLUS:
case Id_leftContext:
case Id_BACK_QUOTE:
case Id_rightContext:
case Id_QUOTE:
// non-configurable + non-writable
return;
default:
int substring_number = shifted - DOLLAR_ID_BASE - 1;
if (0 <= substring_number && substring_number <= 8) {
// non-configurable + non-writable
return;
}
}
super.setInstanceIdAttributes(id, attr);
}
private int multilineAttr = PERMANENT;
private int starAttr = PERMANENT;
private int inputAttr = PERMANENT;
private int underscoreAttr = PERMANENT;
}