Java ScriptRuntime类代码示例

import org.mozilla.javascript.ScriptRuntime; //导入依赖的package包/类
@Override
public Object execIdCall(IdFunctionObject f, Context cx, Scriptable scope,
                         Scriptable thisObj, Object[] args)
{
    if (!f.hasTag(CLASS_NAME)) {
        return super.execIdCall(f, cx, scope, thisObj, args);
    }
    int id = f.methodId();
    switch (id) {
    case ConstructorId_isView:
        return (isArg(args, 0) && (args[0] instanceof NativeArrayBufferView));

    case Id_constructor:
        int length = isArg(args, 0) ? ScriptRuntime.toInt32(args[0]) : 0;
        return new NativeArrayBuffer(length);

    case Id_slice:
        NativeArrayBuffer self = realThis(thisObj, f);
        int start = isArg(args, 0) ? ScriptRuntime.toInt32(args[0]) : 0;
        int end = isArg(args, 1) ? ScriptRuntime.toInt32(args[1]) : self.buffer.length;
        return self.slice(start, end);
    }
    throw new IllegalArgumentException(String.valueOf(id));
}
 

import org.mozilla.javascript.ScriptRuntime; //导入依赖的package包/类
private void setRange(NativeTypedArrayView v, int off)
{
    if (off >= length) {
        throw ScriptRuntime.constructError("RangeError", "offset out of range");
    }

    if (v.length > (length - off)) {
        throw ScriptRuntime.constructError("RangeError", "source array too long");
    }

    if (v.arrayBuffer == arrayBuffer) {
        // Copy to temporary space first, as per spec, to avoid messing up overlapping copies
        Object[] tmp = new Object[v.length];
        for (int i = 0; i < v.length; i++) {
            tmp[i] = v.js_get(i);
        }
        for (int i = 0; i < v.length; i++) {
            js_set(i + off, tmp[i]);
        }
    } else {
        for (int i = 0; i < v.length; i++) {
            js_set(i + off, v.js_get(i));
        }
    }
}
 

import org.mozilla.javascript.ScriptRuntime; //导入依赖的package包/类
private Object js_getInt(int bytes, boolean signed, Object[] args)
{
    checkOffset(args, 0);

    int pos = ScriptRuntime.toInt32(args[0]);
    rangeCheck(pos, bytes);

    boolean littleEndian =
        (isArg(args, 1) && (bytes > 1) && ScriptRuntime.toBoolean(args[1]));

    switch (bytes) {
    case 1:
        return (signed ? ByteIo.readInt8(arrayBuffer.buffer, offset + pos) :
                         ByteIo.readUint8(arrayBuffer.buffer, offset + pos));
    case 2:
        return (signed ? ByteIo.readInt16(arrayBuffer.buffer, offset + pos, littleEndian) :
                         ByteIo.readUint16(arrayBuffer.buffer, offset + pos, littleEndian));
    case 4:
        return (signed ? ByteIo.readInt32(arrayBuffer.buffer, offset + pos, littleEndian) :
                         ByteIo.readUint32(arrayBuffer.buffer, offset + pos, littleEndian));
    default:
        throw new AssertionError();
    }
}
 

import org.mozilla.javascript.ScriptRuntime; //导入依赖的package包/类
private Object js_getFloat(int bytes, Object[] args)
{
    checkOffset(args, 0);

    int pos = ScriptRuntime.toInt32(args[0]);
    rangeCheck(pos, bytes);

    boolean littleEndian =
        (isArg(args, 1) && (bytes > 1) && ScriptRuntime.toBoolean(args[1]));

    switch (bytes) {
    case 4:
        return ByteIo.readFloat32(arrayBuffer.buffer, offset + pos, littleEndian);
    case 8:
        return ByteIo.readFloat64(arrayBuffer.buffer, offset + pos, littleEndian);
    default:
        throw new AssertionError();
    }
}
 

import org.mozilla.javascript.ScriptRuntime; //导入依赖的package包/类
private void js_setFloat(int bytes, Object[] args)
{
    checkOffset(args, 0);
    checkValue(args, 1);

    int pos = ScriptRuntime.toInt32(args[0]);
    rangeCheck(pos, bytes);

    boolean littleEndian =
        (isArg(args, 2) && (bytes > 1) && ScriptRuntime.toBoolean(args[2]));
    double val = ScriptRuntime.toNumber(args[1]);

    switch (bytes) {
    case 4:
        ByteIo.writeFloat32(arrayBuffer.buffer, offset + pos, val, littleEndian);
        break;
    case 8:
        ByteIo.writeFloat64(arrayBuffer.buffer, offset + pos, val, littleEndian);
        break;
    default:
        throw new AssertionError();
    }
}
 

import org.mozilla.javascript.ScriptRuntime; //导入依赖的package包/类
public static int toUint8Clamp(Object arg)
{
    double d = ScriptRuntime.toNumber(arg);
    if (d <= 0.0) {
        return 0;
    }
    if (d >= 255.0) {
        return 255;
    }

    // Complex rounding behavior -- see 7.1.11
    double f = Math.floor(d);
    if ((f + 0.5) < d) {
        return (int)(f + 1.0);
    }
    if (d < (f + 0.5)) {
        return (int)f;
    }
    if (((int)f % 2) != 0) {
        return (int)f + 1;
    }
    return (int)f;
}
 

import org.mozilla.javascript.ScriptRuntime; //导入依赖的package包/类
public static void init(Context cx, Scriptable scope, boolean sealed)
{

    NativeRegExp proto = new NativeRegExp();
    proto.re = compileRE(cx, "", null, false);
    proto.activatePrototypeMap(MAX_PROTOTYPE_ID);
    proto.setParentScope(scope);
    proto.setPrototype(getObjectPrototype(scope));

    NativeRegExpCtor ctor = new NativeRegExpCtor();
    // Bug #324006: ECMA-262 15.10.6.1 says "The initial value of
    // RegExp.prototype.constructor is the builtin RegExp constructor."
    proto.defineProperty("constructor", ctor, ScriptableObject.DONTENUM);

    ScriptRuntime.setFunctionProtoAndParent(ctor, scope);

    ctor.setImmunePrototypeProperty(proto);

    if (sealed) {
        proto.sealObject();
        ctor.sealObject();
    }

    defineProperty(scope, "RegExp", ctor, ScriptableObject.DONTENUM);
}
 

import org.mozilla.javascript.ScriptRuntime; //导入依赖的package包/类
Scriptable compile(Context cx, Scriptable scope, Object[] args)
{
    if (args.length > 0 && args[0] instanceof NativeRegExp) {
        if (args.length > 1 && args[1] != Undefined.instance) {
            // report error
            throw ScriptRuntime.typeError0("msg.bad.regexp.compile");
        }
        NativeRegExp thatObj = (NativeRegExp) args[0];
        this.re = thatObj.re;
        this.lastIndex = thatObj.lastIndex;
        return this;
    }
    String s = args.length == 0 || args[0] instanceof Undefined ? "" : escapeRegExp(args[0]);
    String global = args.length > 1 && args[1] != Undefined.instance
        ? ScriptRuntime.toString(args[1])
        : null;
    this.re = compileRE(cx, s, global, false);
    this.lastIndex = 0d;
    return this;
}
 

import org.mozilla.javascript.ScriptRuntime; //导入依赖的package包/类
private static String escapeRegExp(Object src) {
    String s = ScriptRuntime.toString(src);
    // Escape any naked slashes in regexp source, see bug #510265
    StringBuilder sb = null; // instantiated only if necessary
    int start = 0;
    int slash = s.indexOf('/');
    while (slash > -1) {
        if (slash == start || s.charAt(slash - 1) != '\\') {
            if (sb == null) {
                sb = new StringBuilder();
            }
            sb.append(s, start, slash);
            sb.append("\\/");
            start = slash + 1;
        }
        slash = s.indexOf('/', slash + 1);
    }
    if (sb != null) {
        sb.append(s, start, s.length());
        s = sb.toString();
    }
    return s;
}
 

import org.mozilla.javascript.ScriptRuntime; //导入依赖的package包/类
private static void
addCharacterRangeToCharSet(RECharSet cs, char c1, char c2)
{
    int i;

    int byteIndex1 = (c1 / 8);
    int byteIndex2 = (c2 / 8);

    if ((c2 >= cs.length) || (c1 > c2)) {
        throw ScriptRuntime.constructError("SyntaxError",
                "invalid range in character class");
    }

    c1 &= 0x7;
    c2 &= 0x7;

    if (byteIndex1 == byteIndex2) {
        cs.bits[byteIndex1] |= ((0xFF) >> (7 - (c2 - c1))) << c1;
    }
    else {
        cs.bits[byteIndex1] |= 0xFF << c1;
        for (i = byteIndex1 + 1; i < byteIndex2; i++)
            cs.bits[i] = (byte)0xFF;
        cs.bits[byteIndex2] |= (0xFF) >> (7 - c2);
    }
}
 

import org.mozilla.javascript.ScriptRuntime; //导入依赖的package包/类
@Override
protected Object getInstanceIdValue(int id)
{
    switch (id) {
      case Id_lastIndex:
        return lastIndex;
      case Id_source:
        return new String(re.source);
      case Id_global:
        return ScriptRuntime.wrapBoolean((re.flags & JSREG_GLOB) != 0);
      case Id_ignoreCase:
        return ScriptRuntime.wrapBoolean((re.flags & JSREG_FOLD) != 0);
      case Id_multiline:
        return ScriptRuntime.wrapBoolean((re.flags & JSREG_MULTILINE) != 0);
    }
    return super.getInstanceIdValue(id);
}
 

import org.mozilla.javascript.ScriptRuntime; //导入依赖的package包/类
public static void init(Context cx, Scriptable scope, boolean sealed)
{

    NativeRegExp proto = new NativeRegExp();
    proto.re = (RECompiled)compileRE(cx, "", null, false);
    proto.activatePrototypeMap(MAX_PROTOTYPE_ID);
    proto.setParentScope(scope);
    proto.setPrototype(getObjectPrototype(scope));

    NativeRegExpCtor ctor = new NativeRegExpCtor();
    // Bug #324006: ECMA-262 15.10.6.1 says "The initial value of
    // RegExp.prototype.constructor is the builtin RegExp constructor." 
    proto.defineProperty("constructor", ctor, ScriptableObject.DONTENUM);

    ScriptRuntime.setFunctionProtoAndParent(ctor, scope);

    ctor.setImmunePrototypeProperty(proto);

    if (sealed) {
        proto.sealObject();
        ctor.sealObject();
    }

    defineProperty(scope, "RegExp", ctor, ScriptableObject.DONTENUM);
}
 

import org.mozilla.javascript.ScriptRuntime; //导入依赖的package包/类
Scriptable compile(Context cx, Scriptable scope, Object[] args)
{
    if (args.length > 0 && args[0] instanceof NativeRegExp) {
        if (args.length > 1 && args[1] != Undefined.instance) {
            // report error
            throw ScriptRuntime.typeError0("msg.bad.regexp.compile");
        }
        NativeRegExp thatObj = (NativeRegExp) args[0];
        this.re = thatObj.re;
        this.lastIndex = thatObj.lastIndex;
        return this;
    }
    String s = args.length == 0 ? "" : ScriptRuntime.toString(args[0]);
    String global = args.length > 1 && args[1] != Undefined.instance
        ? ScriptRuntime.toString(args[1])
        : null;
    this.re = (RECompiled)compileRE(cx, s, global, false);
    this.lastIndex = 0;
    return this;
}
 

import org.mozilla.javascript.ScriptRuntime; //导入依赖的package包/类
@Override
protected Object getInstanceIdValue(int id)
{
    switch (id) {
      case Id_lastIndex:
        return ScriptRuntime.wrapNumber(lastIndex);
      case Id_source:
        return new String(re.source);
      case Id_global:
        return ScriptRuntime.wrapBoolean((re.flags & JSREG_GLOB) != 0);
      case Id_ignoreCase:
        return ScriptRuntime.wrapBoolean((re.flags & JSREG_FOLD) != 0);
      case Id_multiline:
        return ScriptRuntime.wrapBoolean((re.flags & JSREG_MULTILINE) != 0);
    }
    return super.getInstanceIdValue(id);
}
 

import org.mozilla.javascript.ScriptRuntime; //导入依赖的package包/类
public void testIt()
{
	final String script = "var fn = function() { return this; }\n"
		+ "fn.apply(1)";

	final ContextAction action = new ContextAction()
	{
		public Object run(final Context _cx)
		{
			final ScriptableObject scope = _cx.initStandardObjects();
			final Object result = _cx.evaluateString(scope, script, "test script", 0, null);
			assertEquals("object", ScriptRuntime.typeof(result));
			assertEquals("1", Context.toString(result));
			return null;
		}
	};
	Utils.runWithAllOptimizationLevels(action);
}