3 class GlobalScopeImpl extends JS.Scope {
4 private final static Double NaN = new Double(Double.NaN);
5 private final static Double POSITIVE_INFINITY = new Double(Double.POSITIVE_INFINITY);
7 public GlobalScopeImpl(JS.Scope parent) {
10 public Object get(Object key) {
11 if(key.equals("NaN")) return NaN;
12 if(key.equals("Infinity")) return POSITIVE_INFINITY;
13 if(key.equals("undefined")) return null;
14 return super.get(key);
16 public Object callMethod(Object method, JS.Array args, boolean checkOnly) {
17 if(method.equals("parseInt")) {
18 if(checkOnly) return Boolean.TRUE;
19 return parseInt(args);
20 } else if(method.equals("parseFloat")) {
21 if(checkOnly) return Boolean.TRUE;
22 return parseFloat(args);
23 } else if(method.equals("isNaN")) {
24 if(checkOnly) return Boolean.TRUE;
26 } else if(method.equals("isFinite")) {
27 if(checkOnly) return Boolean.TRUE;
28 return isFinite(args);
29 } else if(method.equals("decodeURI")) {
30 if(checkOnly) return Boolean.TRUE;
31 return decodeURI(args);
32 } else if(method.equals("decodeURIComponent")) {
33 if(checkOnly) return Boolean.TRUE;
34 return decodeURIComponent(args);
35 } else if(method.equals("encodeURI")) {
36 if(checkOnly) return Boolean.TRUE;
37 return encodeURI(args);
38 } else if(method.equals("encodeURIComponent")) {
39 if(checkOnly) return Boolean.TRUE;
40 return encodeURIComponent(args);
41 } else if(method.equals("stringFromCharCode")) {
42 if(checkOnly) return Boolean.TRUE;
43 return stringFromCharCode(args);
45 return super.callMethod(method,args,checkOnly);
47 private Object stringFromCharCode(JS.Array args) {
48 char buf[] = new char[args.length()];
49 for(int i=0;i<args.length();i++)
50 buf[i] = (char)(JS.toInt(args.elementAt(i)) & 0xffff);
51 return new String(buf);
53 private Object parseInt(JS.Array args) {
54 String s = args.length() > 0 ? args.elementAt(0).toString() : "";
55 int radix = args.length() > 1 ? toInt(args.elementAt(1)) : 0;
57 int length = s.length();
60 if(radix != 0 && (radix < 2 || radix > 36)) return NaN;
61 while(start < length && Character.isWhitespace(s.charAt(start))) start++;
62 if((length >= start+1) && (s.charAt(start) == '+' || s.charAt(start) == '-')) {
63 sign = s.charAt(start) == '+' ? 1 : -1;
66 if(radix == 0 && length >= start+1 && s.charAt(start) == '0') {
68 if(length >= start+1 && (s.charAt(start) == 'x' || s.charAt(start) == 'X')) {
73 if(length == start || Character.digit(s.charAt(start+1),8)==-1) return new Integer(0);
76 if(radix == 0) radix = 10;
77 if(length == start || Character.digit(s.charAt(start),radix) == -1) return NaN;
78 // try the fast way first
80 String s2 = start == 0 ? s : s.substring(start);
81 return new Integer(sign*Integer.parseInt(s2,radix));
82 } catch(NumberFormatException e) { }
83 // fall through to a slower but emca-compliant method
84 for(int i=start;i<length;i++) {
85 int digit = Character.digit(s.charAt(i),radix);
88 if(n < 0) return NaN; // overflow;
90 if(n <= Integer.MAX_VALUE) return new Integer(sign*(int)n);
91 return new Long((long)sign*n);
93 private Object parseFloat(JS.Array args) {
94 String s = args.length() > 0 ? args.elementAt(0).toString() : "";
96 int length = s.length();
97 while(start < length && Character.isWhitespace(s.charAt(0))) start++;
99 // as long as the string has no trailing garbage,this is fast, its slow with
103 return new Double(s.substring(start,length));
104 } catch(NumberFormatException e) { }
109 private Object isNaN(JS.Array args) {
110 double d = args.length() > 0 ? toDouble(args.elementAt(0)) : Double.NaN;
111 return d == d ? Boolean.FALSE : Boolean.TRUE;
113 private Object isFinite(JS.Array args) {
114 double d = args.length() > 0 ? toDouble(args.elementAt(0)) : Double.NaN;
115 return (d == d && !Double.isInfinite(d)) ? Boolean.TRUE : Boolean.FALSE;
117 private Object decodeURI(JS.Array args) {
118 throw new JS.Exn("decodeURI is unimplemented");
120 private Object decodeURIComponent(JS.Array args) {
121 throw new JS.Exn("decodeURIComponent is unimplemented");
123 private Object encodeURI(JS.Array args) {
124 throw new JS.Exn("encodeURI is unimplemented");
126 private Object encodeURIComponent(JS.Array args) {
127 throw new JS.Exn("encodeURIComponent is unimplemented");