Rhino JavaScript Java Library Source Code
Rhino JavaScript Java Library is an open-source implementation of JavaScript
written entirely in Java.
Rhino JavaScript Java Library Source Code files are provided in binary package (rhino-1.7.14.zip).
You can also browse the source code below:
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⏎ org/mozilla/javascript/NativeString.java
/* -*- 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 static org.mozilla.javascript.ScriptRuntime.rangeError;
import static org.mozilla.javascript.ScriptRuntimeES6.requireObjectCoercible;
import java.text.Collator;
import java.text.Normalizer;
import java.util.Locale;
import org.mozilla.javascript.ScriptRuntime.StringIdOrIndex;
import org.mozilla.javascript.regexp.NativeRegExp;
/**
* This class implements the String native object.
*
* <p>See ECMA 15.5.
*
* <p>String methods for dealing with regular expressions are ported directly from C. Latest port is
* from version 1.40.12.19 in the JSFUN13_BRANCH.
*
* @author Mike McCabe
* @author Norris Boyd
* @author Ronald Brill
*/
final class NativeString extends IdScriptableObject {
private static final long serialVersionUID = 920268368584188687L;
private static final Object STRING_TAG = "String";
static void init(Scriptable scope, boolean sealed) {
NativeString obj = new NativeString("");
obj.exportAsJSClass(MAX_PROTOTYPE_ID, scope, sealed);
}
NativeString(CharSequence s) {
string = s;
}
@Override
public String getClassName() {
return "String";
}
private static final int Id_length = 1, MAX_INSTANCE_ID = 1;
@Override
protected int getMaxInstanceId() {
return MAX_INSTANCE_ID;
}
@Override
protected int findInstanceIdInfo(String s) {
if (s.equals("length")) {
return instanceIdInfo(DONTENUM | READONLY | PERMANENT, Id_length);
}
return super.findInstanceIdInfo(s);
}
@Override
protected String getInstanceIdName(int id) {
if (id == Id_length) {
return "length";
}
return super.getInstanceIdName(id);
}
@Override
protected Object getInstanceIdValue(int id) {
if (id == Id_length) {
return ScriptRuntime.wrapInt(string.length());
}
return super.getInstanceIdValue(id);
}
@Override
protected void fillConstructorProperties(IdFunctionObject ctor) {
addIdFunctionProperty(ctor, STRING_TAG, ConstructorId_fromCharCode, "fromCharCode", 1);
addIdFunctionProperty(ctor, STRING_TAG, ConstructorId_fromCodePoint, "fromCodePoint", 1);
addIdFunctionProperty(ctor, STRING_TAG, ConstructorId_raw, "raw", 1);
addIdFunctionProperty(ctor, STRING_TAG, ConstructorId_charAt, "charAt", 2);
addIdFunctionProperty(ctor, STRING_TAG, ConstructorId_charCodeAt, "charCodeAt", 2);
addIdFunctionProperty(ctor, STRING_TAG, ConstructorId_indexOf, "indexOf", 2);
addIdFunctionProperty(ctor, STRING_TAG, ConstructorId_lastIndexOf, "lastIndexOf", 2);
addIdFunctionProperty(ctor, STRING_TAG, ConstructorId_split, "split", 3);
addIdFunctionProperty(ctor, STRING_TAG, ConstructorId_substring, "substring", 3);
addIdFunctionProperty(ctor, STRING_TAG, ConstructorId_toLowerCase, "toLowerCase", 1);
addIdFunctionProperty(ctor, STRING_TAG, ConstructorId_toUpperCase, "toUpperCase", 1);
addIdFunctionProperty(ctor, STRING_TAG, ConstructorId_substr, "substr", 3);
addIdFunctionProperty(ctor, STRING_TAG, ConstructorId_concat, "concat", 2);
addIdFunctionProperty(ctor, STRING_TAG, ConstructorId_slice, "slice", 3);
addIdFunctionProperty(
ctor, STRING_TAG, ConstructorId_equalsIgnoreCase, "equalsIgnoreCase", 2);
addIdFunctionProperty(ctor, STRING_TAG, ConstructorId_match, "match", 2);
addIdFunctionProperty(ctor, STRING_TAG, ConstructorId_search, "search", 2);
addIdFunctionProperty(ctor, STRING_TAG, ConstructorId_replace, "replace", 2);
addIdFunctionProperty(ctor, STRING_TAG, ConstructorId_localeCompare, "localeCompare", 2);
addIdFunctionProperty(
ctor, STRING_TAG, ConstructorId_toLocaleLowerCase, "toLocaleLowerCase", 1);
super.fillConstructorProperties(ctor);
}
@Override
protected void initPrototypeId(int id) {
if (id == SymbolId_iterator) {
initPrototypeMethod(STRING_TAG, id, SymbolKey.ITERATOR, "[Symbol.iterator]", 0);
return;
}
String s, fnName = null;
int arity;
switch (id) {
case Id_constructor:
arity = 1;
s = "constructor";
break;
case Id_toString:
arity = 0;
s = "toString";
break;
case Id_toSource:
arity = 0;
s = "toSource";
break;
case Id_valueOf:
arity = 0;
s = "valueOf";
break;
case Id_charAt:
arity = 1;
s = "charAt";
break;
case Id_charCodeAt:
arity = 1;
s = "charCodeAt";
break;
case Id_indexOf:
arity = 1;
s = "indexOf";
break;
case Id_lastIndexOf:
arity = 1;
s = "lastIndexOf";
break;
case Id_split:
arity = 2;
s = "split";
break;
case Id_substring:
arity = 2;
s = "substring";
break;
case Id_toLowerCase:
arity = 0;
s = "toLowerCase";
break;
case Id_toUpperCase:
arity = 0;
s = "toUpperCase";
break;
case Id_substr:
arity = 2;
s = "substr";
break;
case Id_concat:
arity = 1;
s = "concat";
break;
case Id_slice:
arity = 2;
s = "slice";
break;
case Id_bold:
arity = 0;
s = "bold";
break;
case Id_italics:
arity = 0;
s = "italics";
break;
case Id_fixed:
arity = 0;
s = "fixed";
break;
case Id_strike:
arity = 0;
s = "strike";
break;
case Id_small:
arity = 0;
s = "small";
break;
case Id_big:
arity = 0;
s = "big";
break;
case Id_blink:
arity = 0;
s = "blink";
break;
case Id_sup:
arity = 0;
s = "sup";
break;
case Id_sub:
arity = 0;
s = "sub";
break;
case Id_fontsize:
arity = 0;
s = "fontsize";
break;
case Id_fontcolor:
arity = 0;
s = "fontcolor";
break;
case Id_link:
arity = 0;
s = "link";
break;
case Id_anchor:
arity = 0;
s = "anchor";
break;
case Id_equals:
arity = 1;
s = "equals";
break;
case Id_equalsIgnoreCase:
arity = 1;
s = "equalsIgnoreCase";
break;
case Id_match:
arity = 1;
s = "match";
break;
case Id_search:
arity = 1;
s = "search";
break;
case Id_replace:
arity = 2;
s = "replace";
break;
case Id_localeCompare:
arity = 1;
s = "localeCompare";
break;
case Id_toLocaleLowerCase:
arity = 0;
s = "toLocaleLowerCase";
break;
case Id_toLocaleUpperCase:
arity = 0;
s = "toLocaleUpperCase";
break;
case Id_trim:
arity = 0;
s = "trim";
break;
case Id_trimLeft:
arity = 0;
s = "trimLeft";
break;
case Id_trimRight:
arity = 0;
s = "trimRight";
break;
case Id_includes:
arity = 1;
s = "includes";
break;
case Id_startsWith:
arity = 1;
s = "startsWith";
break;
case Id_endsWith:
arity = 1;
s = "endsWith";
break;
case Id_normalize:
arity = 0;
s = "normalize";
break;
case Id_repeat:
arity = 1;
s = "repeat";
break;
case Id_codePointAt:
arity = 1;
s = "codePointAt";
break;
case Id_padStart:
arity = 1;
s = "padStart";
break;
case Id_padEnd:
arity = 1;
s = "padEnd";
break;
case Id_trimStart:
arity = 0;
s = "trimStart";
break;
case Id_trimEnd:
arity = 0;
s = "trimEnd";
break;
default:
throw new IllegalArgumentException(String.valueOf(id));
}
initPrototypeMethod(STRING_TAG, id, s, fnName, arity);
}
@Override
public Object execIdCall(
IdFunctionObject f, Context cx, Scriptable scope, Scriptable thisObj, Object[] args) {
if (!f.hasTag(STRING_TAG)) {
return super.execIdCall(f, cx, scope, thisObj, args);
}
int id = f.methodId();
again:
for (; ; ) {
switch (id) {
case ConstructorId_charAt:
case ConstructorId_charCodeAt:
case ConstructorId_indexOf:
case ConstructorId_lastIndexOf:
case ConstructorId_split:
case ConstructorId_substring:
case ConstructorId_toLowerCase:
case ConstructorId_toUpperCase:
case ConstructorId_substr:
case ConstructorId_concat:
case ConstructorId_slice:
case ConstructorId_equalsIgnoreCase:
case ConstructorId_match:
case ConstructorId_search:
case ConstructorId_replace:
case ConstructorId_localeCompare:
case ConstructorId_toLocaleLowerCase:
{
if (args.length > 0) {
thisObj =
ScriptRuntime.toObject(
cx, scope, ScriptRuntime.toCharSequence(args[0]));
Object[] newArgs = new Object[args.length - 1];
for (int i = 0; i < newArgs.length; i++) newArgs[i] = args[i + 1];
args = newArgs;
} else {
thisObj =
ScriptRuntime.toObject(
cx, scope, ScriptRuntime.toCharSequence(thisObj));
}
id = -id;
continue again;
}
case ConstructorId_fromCodePoint:
{
int n = args.length;
if (n < 1) {
return "";
}
int[] codePoints = new int[n];
for (int i = 0; i != n; i++) {
Object arg = args[i];
int codePoint = ScriptRuntime.toInt32(arg);
double num = ScriptRuntime.toNumber(arg);
if (!ScriptRuntime.eqNumber(num, Integer.valueOf(codePoint))
|| !Character.isValidCodePoint(codePoint)) {
throw rangeError(
"Invalid code point " + ScriptRuntime.toString(arg));
}
codePoints[i] = codePoint;
}
return new String(codePoints, 0, n);
}
case ConstructorId_fromCharCode:
{
int n = args.length;
if (n < 1) {
return "";
}
char[] chars = new char[n];
for (int i = 0; i != n; ++i) {
chars[i] = ScriptRuntime.toUint16(args[i]);
}
return new String(chars);
}
case ConstructorId_raw:
return js_raw(cx, scope, args);
case Id_constructor:
{
CharSequence s;
if (args.length == 0) {
s = "";
} else if (ScriptRuntime.isSymbol(args[0]) && (thisObj != null)) {
// 19.4.3.2 et.al. Convert a symbol to a string with String() but not
// new String()
s = args[0].toString();
} else {
s = ScriptRuntime.toCharSequence(args[0]);
}
if (thisObj == null) {
// new String(val) creates a new String object.
return new NativeString(s);
}
// String(val) converts val to a string value.
return s instanceof String ? s : s.toString();
}
case Id_toString:
case Id_valueOf:
// ECMA 15.5.4.2: 'the toString function is not generic.
CharSequence cs = realThis(thisObj, f).string;
return cs instanceof String ? cs : cs.toString();
case Id_toSource:
{
CharSequence s = realThis(thisObj, f).string;
return "(new String(\"" + ScriptRuntime.escapeString(s.toString()) + "\"))";
}
case Id_charAt:
case Id_charCodeAt:
{
// See ECMA 15.5.4.[4,5]
CharSequence target =
ScriptRuntime.toCharSequence(
requireObjectCoercible(cx, thisObj, f));
double pos = ScriptRuntime.toInteger(args, 0);
if (pos < 0 || pos >= target.length()) {
if (id == Id_charAt) return "";
return ScriptRuntime.NaNobj;
}
char c = target.charAt((int) pos);
if (id == Id_charAt) return String.valueOf(c);
return ScriptRuntime.wrapInt(c);
}
case Id_indexOf:
{
String thisString =
ScriptRuntime.toString(requireObjectCoercible(cx, thisObj, f));
return ScriptRuntime.wrapInt(js_indexOf(Id_indexOf, thisString, args));
}
case Id_includes:
case Id_startsWith:
case Id_endsWith:
String thisString =
ScriptRuntime.toString(requireObjectCoercible(cx, thisObj, f));
if (args.length > 0 && args[0] instanceof NativeRegExp) {
throw ScriptRuntime.typeErrorById(
"msg.first.arg.not.regexp",
String.class.getSimpleName(),
f.getFunctionName());
}
int idx = js_indexOf(id, thisString, args);
if (id == Id_includes) {
return Boolean.valueOf(idx != -1);
}
if (id == Id_startsWith) {
return Boolean.valueOf(idx == 0);
}
if (id == Id_endsWith) {
return Boolean.valueOf(idx != -1);
}
// fallthrough
case Id_padStart:
case Id_padEnd:
return js_pad(cx, thisObj, f, args, id == Id_padStart);
case Id_lastIndexOf:
{
String thisStr =
ScriptRuntime.toString(requireObjectCoercible(cx, thisObj, f));
return ScriptRuntime.wrapInt(js_lastIndexOf(thisStr, args));
}
case Id_split:
{
String thisStr =
ScriptRuntime.toString(requireObjectCoercible(cx, thisObj, f));
return ScriptRuntime.checkRegExpProxy(cx)
.js_split(cx, scope, thisStr, args);
}
case Id_substring:
{
CharSequence target =
ScriptRuntime.toCharSequence(
requireObjectCoercible(cx, thisObj, f));
return js_substring(cx, target, args);
}
case Id_toLowerCase:
{
// See ECMA 15.5.4.11
String thisStr =
ScriptRuntime.toString(requireObjectCoercible(cx, thisObj, f));
return thisStr.toLowerCase(Locale.ROOT);
}
case Id_toUpperCase:
{
// See ECMA 15.5.4.12
String thisStr =
ScriptRuntime.toString(requireObjectCoercible(cx, thisObj, f));
return thisStr.toUpperCase(Locale.ROOT);
}
case Id_substr:
{
CharSequence target =
ScriptRuntime.toCharSequence(
requireObjectCoercible(cx, thisObj, f));
return js_substr(target, args);
}
case Id_concat:
{
String thisStr =
ScriptRuntime.toString(requireObjectCoercible(cx, thisObj, f));
return js_concat(thisStr, args);
}
case Id_slice:
{
CharSequence target =
ScriptRuntime.toCharSequence(
requireObjectCoercible(cx, thisObj, f));
return js_slice(target, args);
}
case Id_bold:
return tagify(cx, thisObj, f, "b", null, null);
case Id_italics:
return tagify(cx, thisObj, f, "i", null, null);
case Id_fixed:
return tagify(cx, thisObj, f, "tt", null, null);
case Id_strike:
return tagify(cx, thisObj, f, "strike", null, null);
case Id_small:
return tagify(cx, thisObj, f, "small", null, null);
case Id_big:
return tagify(cx, thisObj, f, "big", null, null);
case Id_blink:
return tagify(cx, thisObj, f, "blink", null, null);
case Id_sup:
return tagify(cx, thisObj, f, "sup", null, null);
case Id_sub:
return tagify(cx, thisObj, f, "sub", null, null);
case Id_fontsize:
return tagify(cx, thisObj, f, "font", "size", args);
case Id_fontcolor:
return tagify(cx, thisObj, f, "font", "color", args);
case Id_link:
return tagify(cx, thisObj, f, "a", "href", args);
case Id_anchor:
return tagify(cx, thisObj, f, "a", "name", args);
case Id_equals:
case Id_equalsIgnoreCase:
{
String s1 = ScriptRuntime.toString(thisObj);
String s2 = ScriptRuntime.toString(args, 0);
return ScriptRuntime.wrapBoolean(
(id == Id_equals) ? s1.equals(s2) : s1.equalsIgnoreCase(s2));
}
case Id_match:
case Id_search:
case Id_replace:
{
int actionType;
if (id == Id_match) {
actionType = RegExpProxy.RA_MATCH;
} else if (id == Id_search) {
actionType = RegExpProxy.RA_SEARCH;
} else {
actionType = RegExpProxy.RA_REPLACE;
}
requireObjectCoercible(cx, thisObj, f);
return ScriptRuntime.checkRegExpProxy(cx)
.action(cx, scope, thisObj, args, actionType);
}
// ECMA-262 1 5.5.4.9
case Id_localeCompare:
{
// For now, create and configure a collator instance. I can't
// actually imagine that this'd be slower than caching them
// a la ClassCache, so we aren't trying to outsmart ourselves
// with a caching mechanism for now.
String thisStr =
ScriptRuntime.toString(requireObjectCoercible(cx, thisObj, f));
Collator collator = Collator.getInstance(cx.getLocale());
collator.setStrength(Collator.IDENTICAL);
collator.setDecomposition(Collator.CANONICAL_DECOMPOSITION);
return ScriptRuntime.wrapNumber(
collator.compare(thisStr, ScriptRuntime.toString(args, 0)));
}
case Id_toLocaleLowerCase:
{
String thisStr =
ScriptRuntime.toString(requireObjectCoercible(cx, thisObj, f));
return thisStr.toLowerCase(cx.getLocale());
}
case Id_toLocaleUpperCase:
{
String thisStr =
ScriptRuntime.toString(requireObjectCoercible(cx, thisObj, f));
return thisStr.toUpperCase(cx.getLocale());
}
case Id_trim:
{
String str = ScriptRuntime.toString(requireObjectCoercible(cx, thisObj, f));
char[] chars = str.toCharArray();
int start = 0;
while (start < chars.length
&& ScriptRuntime.isJSWhitespaceOrLineTerminator(chars[start])) {
start++;
}
int end = chars.length;
while (end > start
&& ScriptRuntime.isJSWhitespaceOrLineTerminator(chars[end - 1])) {
end--;
}
return str.substring(start, end);
}
case Id_trimLeft:
case Id_trimStart:
{
String str = ScriptRuntime.toString(requireObjectCoercible(cx, thisObj, f));
char[] chars = str.toCharArray();
int start = 0;
while (start < chars.length
&& ScriptRuntime.isJSWhitespaceOrLineTerminator(chars[start])) {
start++;
}
int end = chars.length;
return str.substring(start, end);
}
case Id_trimRight:
case Id_trimEnd:
{
String str = ScriptRuntime.toString(requireObjectCoercible(cx, thisObj, f));
char[] chars = str.toCharArray();
int start = 0;
int end = chars.length;
while (end > start
&& ScriptRuntime.isJSWhitespaceOrLineTerminator(chars[end - 1])) {
end--;
}
return str.substring(start, end);
}
case Id_normalize:
{
if (args.length == 0 || Undefined.isUndefined(args[0])) {
return Normalizer.normalize(
ScriptRuntime.toString(requireObjectCoercible(cx, thisObj, f)),
Normalizer.Form.NFC);
}
final String formStr = ScriptRuntime.toString(args, 0);
final Normalizer.Form form;
if (Normalizer.Form.NFD.name().equals(formStr)) form = Normalizer.Form.NFD;
else if (Normalizer.Form.NFKC.name().equals(formStr))
form = Normalizer.Form.NFKC;
else if (Normalizer.Form.NFKD.name().equals(formStr))
form = Normalizer.Form.NFKD;
else if (Normalizer.Form.NFC.name().equals(formStr))
form = Normalizer.Form.NFC;
else
throw rangeError(
"The normalization form should be one of 'NFC', 'NFD', 'NFKC', 'NFKD'.");
return Normalizer.normalize(
ScriptRuntime.toString(requireObjectCoercible(cx, thisObj, f)),
form);
}
case Id_repeat:
{
return js_repeat(cx, thisObj, f, args);
}
case Id_codePointAt:
{
String str = ScriptRuntime.toString(requireObjectCoercible(cx, thisObj, f));
double cnt = ScriptRuntime.toInteger(args, 0);
return (cnt < 0 || cnt >= str.length())
? Undefined.instance
: Integer.valueOf(str.codePointAt((int) cnt));
}
case SymbolId_iterator:
return new NativeStringIterator(scope, requireObjectCoercible(cx, thisObj, f));
}
throw new IllegalArgumentException(
"String.prototype has no method: " + f.getFunctionName());
}
}
private static NativeString realThis(Scriptable thisObj, IdFunctionObject f) {
return ensureType(thisObj, NativeString.class, f);
}
/*
* HTML composition aids.
*/
private static String tagify(
Context cx,
Scriptable thisObj,
IdFunctionObject f,
String tag,
String attribute,
Object[] args) {
String str = ScriptRuntime.toString(requireObjectCoercible(cx, thisObj, f));
StringBuilder result = new StringBuilder();
result.append('<').append(tag);
if (attribute != null && attribute.length() > 0) {
String attributeValue = ScriptRuntime.toString(args, 0);
attributeValue = attributeValue.replace("\"", """);
result.append(' ').append(attribute).append("=\"").append(attributeValue).append('"');
}
result.append('>').append(str).append("</").append(tag).append('>');
return result.toString();
}
public CharSequence toCharSequence() {
return string;
}
@Override
public String toString() {
return string instanceof String ? (String) string : string.toString();
}
/* Make array-style property lookup work for strings.
* XXX is this ECMA? A version check is probably needed. In js too.
*/
@Override
public Object get(int index, Scriptable start) {
if (0 <= index && index < string.length()) {
return String.valueOf(string.charAt(index));
}
return super.get(index, start);
}
@Override
public void put(int index, Scriptable start, Object value) {
if (0 <= index && index < string.length()) {
return;
}
super.put(index, start, value);
}
@Override
public boolean has(int index, Scriptable start) {
if (0 <= index && index < string.length()) {
return true;
}
return super.has(index, start);
}
@Override
public int getAttributes(int index) {
if (0 <= index && index < string.length()) {
int attribs = READONLY | PERMANENT;
if (Context.getContext().getLanguageVersion() < Context.VERSION_ES6) {
attribs |= DONTENUM;
}
return attribs;
}
return super.getAttributes(index);
}
@Override
protected Object[] getIds(boolean nonEnumerable, boolean getSymbols) {
// In ES6, Strings have entries in the property map for each character.
Context cx = Context.getCurrentContext();
if ((cx != null) && (cx.getLanguageVersion() >= Context.VERSION_ES6)) {
Object[] sids = super.getIds(nonEnumerable, getSymbols);
Object[] a = new Object[sids.length + string.length()];
int i;
for (i = 0; i < string.length(); i++) {
a[i] = Integer.valueOf(i);
}
System.arraycopy(sids, 0, a, i, sids.length);
return a;
}
return super.getIds(nonEnumerable, getSymbols);
}
@Override
protected ScriptableObject getOwnPropertyDescriptor(Context cx, Object id) {
if (!(id instanceof Symbol)
&& (cx != null)
&& (cx.getLanguageVersion() >= Context.VERSION_ES6)) {
StringIdOrIndex s = ScriptRuntime.toStringIdOrIndex(cx, id);
if (s.stringId == null && 0 <= s.index && s.index < string.length()) {
String value = String.valueOf(string.charAt(s.index));
return defaultIndexPropertyDescriptor(value);
}
}
return super.getOwnPropertyDescriptor(cx, id);
}
private ScriptableObject defaultIndexPropertyDescriptor(Object value) {
Scriptable scope = getParentScope();
if (scope == null) scope = this;
ScriptableObject desc = new NativeObject();
ScriptRuntime.setBuiltinProtoAndParent(desc, scope, TopLevel.Builtins.Object);
desc.defineProperty("value", value, EMPTY);
desc.defineProperty("writable", Boolean.FALSE, EMPTY);
desc.defineProperty("enumerable", Boolean.TRUE, EMPTY);
desc.defineProperty("configurable", Boolean.FALSE, EMPTY);
return desc;
}
/*
*
* See ECMA 15.5.4.6. Uses Java String.indexOf()
* OPT to add - BMH searching from jsstr.c.
*/
private static int js_indexOf(int methodId, String target, Object[] args) {
String searchStr = ScriptRuntime.toString(args, 0);
double position = ScriptRuntime.toInteger(args, 1);
if (methodId != Id_startsWith && methodId != Id_endsWith && searchStr.length() == 0) {
return position > target.length() ? target.length() : (int) position;
}
if (methodId != Id_startsWith && methodId != Id_endsWith && position > target.length()) {
return -1;
}
if (position < 0) position = 0;
else if (position > target.length()) position = target.length();
else if (methodId == Id_endsWith && (Double.isNaN(position) || position > target.length()))
position = target.length();
if (Id_endsWith == methodId) {
if (args.length == 0
|| args.length == 1
|| (args.length == 2 && args[1] == Undefined.instance))
position = target.length();
return target.substring(0, (int) position).endsWith(searchStr) ? 0 : -1;
}
return methodId == Id_startsWith
? target.startsWith(searchStr, (int) position) ? 0 : -1
: target.indexOf(searchStr, (int) position);
}
/*
*
* See ECMA 15.5.4.7
*
*/
private static int js_lastIndexOf(String target, Object[] args) {
String search = ScriptRuntime.toString(args, 0);
double end = ScriptRuntime.toNumber(args, 1);
if (Double.isNaN(end) || end > target.length()) end = target.length();
else if (end < 0) end = 0;
return target.lastIndexOf(search, (int) end);
}
/*
* See ECMA 15.5.4.15
*/
private static CharSequence js_substring(Context cx, CharSequence target, Object[] args) {
int length = target.length();
double start = ScriptRuntime.toInteger(args, 0);
double end;
if (start < 0) start = 0;
else if (start > length) start = length;
if (args.length <= 1 || args[1] == Undefined.instance) {
end = length;
} else {
end = ScriptRuntime.toInteger(args[1]);
if (end < 0) end = 0;
else if (end > length) end = length;
// swap if end < start
if (end < start) {
if (cx.getLanguageVersion() != Context.VERSION_1_2) {
double temp = start;
start = end;
end = temp;
} else {
// Emulate old JDK1.0 java.lang.String.substring()
end = start;
}
}
}
return target.subSequence((int) start, (int) end);
}
int getLength() {
return string.length();
}
/*
* Non-ECMA methods.
*/
private static CharSequence js_substr(CharSequence target, Object[] args) {
if (args.length < 1) {
return target;
}
double begin = ScriptRuntime.toInteger(args[0]);
double end;
int length = target.length();
if (begin < 0) {
begin += length;
if (begin < 0) begin = 0;
} else if (begin > length) {
begin = length;
}
end = length;
if (args.length > 1) {
Object lengthArg = args[1];
if (!Undefined.isUndefined(lengthArg)) {
end = ScriptRuntime.toInteger(lengthArg);
if (end < 0) {
end = 0;
}
end += begin;
if (end > length) {
end = length;
}
}
}
return target.subSequence((int) begin, (int) end);
}
/*
* Python-esque sequence operations.
*/
private static String js_concat(String target, Object[] args) {
int N = args.length;
if (N == 0) {
return target;
} else if (N == 1) {
String arg = ScriptRuntime.toString(args[0]);
return target.concat(arg);
}
// Find total capacity for the final string to avoid unnecessary
// re-allocations in StringBuilder
int size = target.length();
String[] argsAsStrings = new String[N];
for (int i = 0; i != N; ++i) {
String s = ScriptRuntime.toString(args[i]);
argsAsStrings[i] = s;
size += s.length();
}
StringBuilder result = new StringBuilder(size);
result.append(target);
for (int i = 0; i != N; ++i) {
result.append(argsAsStrings[i]);
}
return result.toString();
}
private static CharSequence js_slice(CharSequence target, Object[] args) {
double begin = args.length < 1 ? 0 : ScriptRuntime.toInteger(args[0]);
double end;
int length = target.length();
if (begin < 0) {
begin += length;
if (begin < 0) begin = 0;
} else if (begin > length) {
begin = length;
}
if (args.length < 2 || args[1] == Undefined.instance) {
end = length;
} else {
end = ScriptRuntime.toInteger(args[1]);
if (end < 0) {
end += length;
if (end < 0) end = 0;
} else if (end > length) {
end = length;
}
if (end < begin) end = begin;
}
return target.subSequence((int) begin, (int) end);
}
private static String js_repeat(
Context cx, Scriptable thisObj, IdFunctionObject f, Object[] args) {
String str = ScriptRuntime.toString(requireObjectCoercible(cx, thisObj, f));
double cnt = ScriptRuntime.toInteger(args, 0);
if ((cnt < 0.0) || (cnt == Double.POSITIVE_INFINITY)) {
throw rangeError("Invalid count value");
}
if (cnt == 0.0 || str.length() == 0) {
return "";
}
long size = str.length() * (long) cnt;
// Check for overflow
if ((cnt > Integer.MAX_VALUE) || (size > Integer.MAX_VALUE)) {
throw rangeError("Invalid size or count value");
}
StringBuilder retval = new StringBuilder((int) size);
retval.append(str);
int i = 1;
int icnt = (int) cnt;
while (i <= (icnt / 2)) {
retval.append(retval);
i *= 2;
}
if (i < icnt) {
retval.append(retval.substring(0, str.length() * (icnt - i)));
}
return retval.toString();
}
/**
* @see https://www.ecma-international.org/ecma-262/8.0/#sec-string.prototype.padstart
* @see https://www.ecma-international.org/ecma-262/8.0/#sec-string.prototype.padend
*/
private static String js_pad(
Context cx, Scriptable thisObj, IdFunctionObject f, Object[] args, boolean atStart) {
String pad = ScriptRuntime.toString(requireObjectCoercible(cx, thisObj, f));
long intMaxLength = ScriptRuntime.toLength(args, 0);
if (intMaxLength <= pad.length()) {
return pad;
}
String filler = " ";
if (args.length >= 2 && !Undefined.isUndefined(args[1])) {
filler = ScriptRuntime.toString(args[1]);
if (filler.length() < 1) {
return pad;
}
}
// cast is not really correct here
int fillLen = (int) (intMaxLength - pad.length());
StringBuilder concat = new StringBuilder();
do {
concat.append(filler);
} while (concat.length() < fillLen);
concat.setLength(fillLen);
if (atStart) {
return concat.append(pad).toString();
}
return concat.insert(0, pad).toString();
}
@Override
protected int findPrototypeId(Symbol k) {
if (SymbolKey.ITERATOR.equals(k)) {
return SymbolId_iterator;
}
return 0;
}
/**
*
*
* <h1>String.raw (template, ...substitutions)</h1>
*
* <p>22.1.2.4 String.raw [Draft ECMA-262 / April 28, 2021]
*/
private static CharSequence js_raw(Context cx, Scriptable scope, Object[] args) {
/* step 1-2 */
Object arg0 = args.length > 0 ? args[0] : Undefined.instance;
Scriptable cooked = ScriptRuntime.toObject(cx, scope, arg0);
/* step 3 */
Object rawValue = ScriptRuntime.getObjectProp(cooked, "raw", cx);
Scriptable raw = ScriptRuntime.toObject(cx, scope, rawValue);
/* step 4-5 */
long rawLength = NativeArray.getLengthProperty(cx, raw);
if (rawLength > Integer.MAX_VALUE) {
throw ScriptRuntime.rangeError("raw.length > " + Integer.toString(Integer.MAX_VALUE));
}
int literalSegments = (int) rawLength;
if (literalSegments <= 0) return "";
/* step 6-7 */
StringBuilder elements = new StringBuilder();
int nextIndex = 0;
for (; ; ) {
/* step 8 a-i */
Object next;
next = ScriptRuntime.getObjectIndex(raw, nextIndex, cx);
String nextSeg = ScriptRuntime.toString(next);
elements.append(nextSeg);
nextIndex += 1;
if (nextIndex == literalSegments) {
break;
}
if (args.length > nextIndex) {
next = args[nextIndex];
String nextSub = ScriptRuntime.toString(next);
elements.append(nextSub);
}
}
return elements;
}
@Override
protected int findPrototypeId(String s) {
int id;
switch (s) {
case "constructor":
id = Id_constructor;
break;
case "toString":
id = Id_toString;
break;
case "toSource":
id = Id_toSource;
break;
case "valueOf":
id = Id_valueOf;
break;
case "charAt":
id = Id_charAt;
break;
case "charCodeAt":
id = Id_charCodeAt;
break;
case "indexOf":
id = Id_indexOf;
break;
case "lastIndexOf":
id = Id_lastIndexOf;
break;
case "split":
id = Id_split;
break;
case "substring":
id = Id_substring;
break;
case "toLowerCase":
id = Id_toLowerCase;
break;
case "toUpperCase":
id = Id_toUpperCase;
break;
case "substr":
id = Id_substr;
break;
case "concat":
id = Id_concat;
break;
case "slice":
id = Id_slice;
break;
case "bold":
id = Id_bold;
break;
case "italics":
id = Id_italics;
break;
case "fixed":
id = Id_fixed;
break;
case "strike":
id = Id_strike;
break;
case "small":
id = Id_small;
break;
case "big":
id = Id_big;
break;
case "blink":
id = Id_blink;
break;
case "sup":
id = Id_sup;
break;
case "sub":
id = Id_sub;
break;
case "fontsize":
id = Id_fontsize;
break;
case "fontcolor":
id = Id_fontcolor;
break;
case "link":
id = Id_link;
break;
case "anchor":
id = Id_anchor;
break;
case "equals":
id = Id_equals;
break;
case "equalsIgnoreCase":
id = Id_equalsIgnoreCase;
break;
case "match":
id = Id_match;
break;
case "search":
id = Id_search;
break;
case "replace":
id = Id_replace;
break;
case "localeCompare":
id = Id_localeCompare;
break;
case "toLocaleLowerCase":
id = Id_toLocaleLowerCase;
break;
case "toLocaleUpperCase":
id = Id_toLocaleUpperCase;
break;
case "trim":
id = Id_trim;
break;
case "trimLeft":
id = Id_trimLeft;
break;
case "trimRight":
id = Id_trimRight;
break;
case "includes":
id = Id_includes;
break;
case "startsWith":
id = Id_startsWith;
break;
case "endsWith":
id = Id_endsWith;
break;
case "normalize":
id = Id_normalize;
break;
case "repeat":
id = Id_repeat;
break;
case "codePointAt":
id = Id_codePointAt;
break;
case "padStart":
id = Id_padStart;
break;
case "padEnd":
id = Id_padEnd;
break;
case "trimStart":
id = Id_trimStart;
break;
case "trimEnd":
id = Id_trimEnd;
break;
default:
id = 0;
break;
}
return id;
}
private static final int ConstructorId_fromCharCode = -1,
ConstructorId_fromCodePoint = -2,
ConstructorId_raw = -3,
Id_constructor = 1,
Id_toString = 2,
Id_toSource = 3,
Id_valueOf = 4,
Id_charAt = 5,
Id_charCodeAt = 6,
Id_indexOf = 7,
Id_lastIndexOf = 8,
Id_split = 9,
Id_substring = 10,
Id_toLowerCase = 11,
Id_toUpperCase = 12,
Id_substr = 13,
Id_concat = 14,
Id_slice = 15,
Id_bold = 16,
Id_italics = 17,
Id_fixed = 18,
Id_strike = 19,
Id_small = 20,
Id_big = 21,
Id_blink = 22,
Id_sup = 23,
Id_sub = 24,
Id_fontsize = 25,
Id_fontcolor = 26,
Id_link = 27,
Id_anchor = 28,
Id_equals = 29,
Id_equalsIgnoreCase = 30,
Id_match = 31,
Id_search = 32,
Id_replace = 33,
Id_localeCompare = 34,
Id_toLocaleLowerCase = 35,
Id_toLocaleUpperCase = 36,
Id_trim = 37,
Id_trimLeft = 38,
Id_trimRight = 39,
Id_includes = 40,
Id_startsWith = 41,
Id_endsWith = 42,
Id_normalize = 43,
Id_repeat = 44,
Id_codePointAt = 45,
Id_padStart = 46,
Id_padEnd = 47,
SymbolId_iterator = 48,
Id_trimStart = 49,
Id_trimEnd = 50,
MAX_PROTOTYPE_ID = Id_trimEnd;
private static final int ConstructorId_charAt = -Id_charAt,
ConstructorId_charCodeAt = -Id_charCodeAt,
ConstructorId_indexOf = -Id_indexOf,
ConstructorId_lastIndexOf = -Id_lastIndexOf,
ConstructorId_split = -Id_split,
ConstructorId_substring = -Id_substring,
ConstructorId_toLowerCase = -Id_toLowerCase,
ConstructorId_toUpperCase = -Id_toUpperCase,
ConstructorId_substr = -Id_substr,
ConstructorId_concat = -Id_concat,
ConstructorId_slice = -Id_slice,
ConstructorId_equalsIgnoreCase = -Id_equalsIgnoreCase,
ConstructorId_match = -Id_match,
ConstructorId_search = -Id_search,
ConstructorId_replace = -Id_replace,
ConstructorId_localeCompare = -Id_localeCompare,
ConstructorId_toLocaleLowerCase = -Id_toLocaleLowerCase;
private CharSequence string;
}
⏎ org/mozilla/javascript/NativeString.java
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