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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.text.Collator;
/**
* This class implements the String native object.
*
* See ECMA 15.5.
*
* 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
*/
final class NativeString extends IdScriptableObject
{
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_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)
{
String s;
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;
default: throw new IllegalArgumentException(String.valueOf(id));
}
initPrototypeMethod(STRING_TAG, id, s, 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(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(scope,
ScriptRuntime.toCharSequence(thisObj));
}
id = -id;
continue again;
}
case ConstructorId_fromCharCode: {
int N = args.length;
if (N < 1)
return "";
StringBuilder sb = new StringBuilder(N);
for (int i = 0; i != N; ++i) {
sb.append(ScriptRuntime.toUint16(args[i]));
}
return sb.toString();
}
case Id_constructor: {
CharSequence s = (args.length >= 1)
? 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(thisObj);
double pos = ScriptRuntime.toInteger(args, 0);
if (pos < 0 || pos >= target.length()) {
if (id == Id_charAt) return "";
else return ScriptRuntime.NaNobj;
}
char c = target.charAt((int)pos);
if (id == Id_charAt) return String.valueOf(c);
else return ScriptRuntime.wrapInt(c);
}
case Id_indexOf:
return ScriptRuntime.wrapInt(js_indexOf(
ScriptRuntime.toString(thisObj), args));
case Id_lastIndexOf:
return ScriptRuntime.wrapInt(js_lastIndexOf(
ScriptRuntime.toString(thisObj), args));
case Id_split:
return ScriptRuntime.checkRegExpProxy(cx).
js_split(cx, scope, ScriptRuntime.toString(thisObj),
args);
case Id_substring:
return js_substring(cx, ScriptRuntime.toCharSequence(thisObj), args);
case Id_toLowerCase:
// See ECMA 15.5.4.11
return ScriptRuntime.toString(thisObj).toLowerCase(
ScriptRuntime.ROOT_LOCALE);
case Id_toUpperCase:
// See ECMA 15.5.4.12
return ScriptRuntime.toString(thisObj).toUpperCase(
ScriptRuntime.ROOT_LOCALE);
case Id_substr:
return js_substr(ScriptRuntime.toCharSequence(thisObj), args);
case Id_concat:
return js_concat(ScriptRuntime.toString(thisObj), args);
case Id_slice:
return js_slice(ScriptRuntime.toCharSequence(thisObj), args);
case Id_bold:
return tagify(thisObj, "b", null, null);
case Id_italics:
return tagify(thisObj, "i", null, null);
case Id_fixed:
return tagify(thisObj, "tt", null, null);
case Id_strike:
return tagify(thisObj, "strike", null, null);
case Id_small:
return tagify(thisObj, "small", null, null);
case Id_big:
return tagify(thisObj, "big", null, null);
case Id_blink:
return tagify(thisObj, "blink", null, null);
case Id_sup:
return tagify(thisObj, "sup", null, null);
case Id_sub:
return tagify(thisObj, "sub", null, null);
case Id_fontsize:
return tagify(thisObj, "font", "size", args);
case Id_fontcolor:
return tagify(thisObj, "font", "color", args);
case Id_link:
return tagify(thisObj, "a", "href", args);
case Id_anchor:
return tagify(thisObj, "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;
}
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.
Collator collator = Collator.getInstance(cx.getLocale());
collator.setStrength(Collator.IDENTICAL);
collator.setDecomposition(Collator.CANONICAL_DECOMPOSITION);
return ScriptRuntime.wrapNumber(collator.compare(
ScriptRuntime.toString(thisObj),
ScriptRuntime.toString(args, 0)));
}
case Id_toLocaleLowerCase:
{
return ScriptRuntime.toString(thisObj)
.toLowerCase(cx.getLocale());
}
case Id_toLocaleUpperCase:
{
return ScriptRuntime.toString(thisObj)
.toUpperCase(cx.getLocale());
}
case Id_trim:
{
String str = ScriptRuntime.toString(thisObj);
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:
{
String str = ScriptRuntime.toString(thisObj);
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:
{
String str = ScriptRuntime.toString(thisObj);
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);
}
}
throw new IllegalArgumentException(String.valueOf(id));
}
}
private static NativeString realThis(Scriptable thisObj, IdFunctionObject f)
{
if (!(thisObj instanceof NativeString))
throw incompatibleCallError(f);
return (NativeString)thisObj;
}
/*
* HTML composition aids.
*/
private static String tagify(Object thisObj, String tag,
String attribute, Object[] args)
{
String str = ScriptRuntime.toString(thisObj);
StringBuilder result = new StringBuilder();
result.append('<');
result.append(tag);
if (attribute != null) {
result.append(' ');
result.append(attribute);
result.append("=\"");
result.append(ScriptRuntime.toString(args, 0));
result.append('"');
}
result.append('>');
result.append(str);
result.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);
}
/*
*
* See ECMA 15.5.4.6. Uses Java String.indexOf()
* OPT to add - BMH searching from jsstr.c.
*/
private static int js_indexOf(String target, Object[] args) {
String search = ScriptRuntime.toString(args, 0);
double begin = ScriptRuntime.toInteger(args, 1);
if (begin > target.length()) {
return -1;
} else {
if (begin < 0)
begin = 0;
return target.indexOf(search, (int)begin);
}
}
/*
*
* 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 (end != 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;
}
if (args.length == 1) {
end = length;
} else {
end = ScriptRuntime.toInteger(args[1]);
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);
}
// #string_id_map#
@Override
protected int findPrototypeId(String s)
{
int id;
// #generated# Last update: 2009-07-23 07:32:39 EST
L0: { id = 0; String X = null; int c;
L: switch (s.length()) {
case 3: c=s.charAt(2);
if (c=='b') { if (s.charAt(0)=='s' && s.charAt(1)=='u') {id=Id_sub; break L0;} }
else if (c=='g') { if (s.charAt(0)=='b' && s.charAt(1)=='i') {id=Id_big; break L0;} }
else if (c=='p') { if (s.charAt(0)=='s' && s.charAt(1)=='u') {id=Id_sup; break L0;} }
break L;
case 4: c=s.charAt(0);
if (c=='b') { X="bold";id=Id_bold; }
else if (c=='l') { X="link";id=Id_link; }
else if (c=='t') { X="trim";id=Id_trim; }
break L;
case 5: switch (s.charAt(4)) {
case 'd': X="fixed";id=Id_fixed; break L;
case 'e': X="slice";id=Id_slice; break L;
case 'h': X="match";id=Id_match; break L;
case 'k': X="blink";id=Id_blink; break L;
case 'l': X="small";id=Id_small; break L;
case 't': X="split";id=Id_split; break L;
} break L;
case 6: switch (s.charAt(1)) {
case 'e': X="search";id=Id_search; break L;
case 'h': X="charAt";id=Id_charAt; break L;
case 'n': X="anchor";id=Id_anchor; break L;
case 'o': X="concat";id=Id_concat; break L;
case 'q': X="equals";id=Id_equals; break L;
case 't': X="strike";id=Id_strike; break L;
case 'u': X="substr";id=Id_substr; break L;
} break L;
case 7: switch (s.charAt(1)) {
case 'a': X="valueOf";id=Id_valueOf; break L;
case 'e': X="replace";id=Id_replace; break L;
case 'n': X="indexOf";id=Id_indexOf; break L;
case 't': X="italics";id=Id_italics; break L;
} break L;
case 8: c=s.charAt(4);
if (c=='r') { X="toString";id=Id_toString; }
else if (c=='s') { X="fontsize";id=Id_fontsize; }
else if (c=='u') { X="toSource";id=Id_toSource; }
else if (c=='L') { X="trimLeft";id=Id_trimLeft; }
break L;
case 9: c=s.charAt(0);
if (c=='f') { X="fontcolor";id=Id_fontcolor; }
else if (c=='s') { X="substring";id=Id_substring; }
else if (c=='t') { X="trimRight";id=Id_trimRight; }
break L;
case 10: X="charCodeAt";id=Id_charCodeAt; break L;
case 11: switch (s.charAt(2)) {
case 'L': X="toLowerCase";id=Id_toLowerCase; break L;
case 'U': X="toUpperCase";id=Id_toUpperCase; break L;
case 'n': X="constructor";id=Id_constructor; break L;
case 's': X="lastIndexOf";id=Id_lastIndexOf; break L;
} break L;
case 13: X="localeCompare";id=Id_localeCompare; break L;
case 16: X="equalsIgnoreCase";id=Id_equalsIgnoreCase; break L;
case 17: c=s.charAt(8);
if (c=='L') { X="toLocaleLowerCase";id=Id_toLocaleLowerCase; }
else if (c=='U') { X="toLocaleUpperCase";id=Id_toLocaleUpperCase; }
break L;
}
if (X!=null && X!=s && !X.equals(s)) id = 0;
break L0;
}
// #/generated#
return id;
}
private static final int
ConstructorId_fromCharCode = -1,
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,
MAX_PROTOTYPE_ID = Id_trimRight;
// #/string_id_map#
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;
}
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