xmlobjectimpl.java

這是一個javascript 的 interpreter是了解 web browser的好材料

    public final Object ecmaGet(Context cx, Object id) {
        if (cx == null) cx = Context.getCurrentContext();
        XMLName xmlName = lib.toXMLNameOrIndex(cx, id);
        if (xmlName == null) {
            long index = ScriptRuntime.lastUint32Result(cx);
            // XXX Fix this cast
            Object result = get((int)index, this);
            if (result == Scriptable.NOT_FOUND) {
                result = Undefined.instance;
            }
            return result;
        }
        return getXMLProperty(xmlName);
    }

    /**
     * Implementation of ECMAScript [[Put]]
     */
    public final void ecmaPut(Context cx, Object id, Object value) {
        if (cx == null) cx = Context.getCurrentContext();
        XMLName xmlName = lib.toXMLNameOrIndex(cx, id);
        if (xmlName == null) {
            long index = ScriptRuntime.lastUint32Result(cx);
            // XXX Fix this cast
            put((int)index, this, value);
            return;
        }
        putXMLProperty(xmlName, value);
    }

    /**
     * Implementation of ECMAScript [[Delete]].
     */
    public final boolean ecmaDelete(Context cx, Object id) {
        if (cx == null) cx = Context.getCurrentContext();
        XMLName xmlName = lib.toXMLNameOrIndex(cx, id);
        if (xmlName == null) {
            long index = ScriptRuntime.lastUint32Result(cx);
            // XXX Fix this
            delete((int)index);
            return true;
        }
        deleteXMLProperty(xmlName);
        return true;
    }

    //    TODO    Can this be made more strongly typed?
    public Ref memberRef(Context cx, Object elem, int memberTypeFlags) {
        boolean attribute = (memberTypeFlags & Node.ATTRIBUTE_FLAG) != 0;
        boolean descendants = (memberTypeFlags & Node.DESCENDANTS_FLAG) != 0;
        if (!attribute && !descendants) {
            // Code generation would use ecma(Get|Has|Delete|Set) for
            // normal name identifiers so one ATTRIBUTE_FLAG
            // or DESCENDANTS_FLAG has to be set
            throw Kit.codeBug();
        }
        XmlNode.QName qname = lib.toNodeQName(cx, elem, attribute);
        XMLName rv = XMLName.create(qname, attribute, descendants);
        rv.initXMLObject(this);
        return rv;
    }

    /**
     * Generic reference to implement x::ns, x.@ns::y, x..@ns::y etc.
     */
    public Ref memberRef(Context cx, Object namespace, Object elem, int memberTypeFlags) {
        boolean attribute = (memberTypeFlags & Node.ATTRIBUTE_FLAG) != 0;
        boolean descendants = (memberTypeFlags & Node.DESCENDANTS_FLAG) != 0;
        XMLName rv = XMLName.create(lib.toNodeQName(cx, namespace, elem), attribute, descendants);
        rv.initXMLObject(this);
        return rv;
    }

    public NativeWith enterWith(Scriptable scope) {
        return new XMLWithScope(lib, scope, this);
    }

    public NativeWith enterDotQuery(Scriptable scope) {
        XMLWithScope xws = new XMLWithScope(lib, scope, this);
        xws.initAsDotQuery();
        return xws;
    }

    public final Object addValues(Context cx, boolean thisIsLeft,
        Object value) {
        if (value instanceof XMLObject) {
            XMLObject v1, v2;
            if (thisIsLeft) {
                v1 = this;
                v2 = (XMLObject)value;
            } else {
                v1 = (XMLObject)value;
                v2 = this;
            }
            return lib.addXMLObjects(cx, v1, v2);
        }
        if (value == Undefined.instance) {
            // both "xml + undefined" and "undefined + xml" gives String(xml)
            return ScriptRuntime.toString(this);
        }

        return super.addValues(cx, thisIsLeft, value);
    }

    //
    //
    // IdScriptableObject machinery
    //
    //

    final void exportAsJSClass(boolean sealed) {
        prototypeFlag = true;
        exportAsJSClass(MAX_PROTOTYPE_ID, getParentScope(), sealed);
    }

// #string_id_map#
    private final static int
        Id_constructor             = 1,

        Id_addNamespace            = 2,
        Id_appendChild             = 3,
        Id_attribute               = 4,
        Id_attributes              = 5,
        Id_child                   = 6,
        Id_childIndex              = 7,
        Id_children                = 8,
        Id_comments                = 9,
        Id_contains                = 10,
        Id_copy                    = 11,
        Id_descendants             = 12,
        Id_elements                = 13,
        Id_inScopeNamespaces       = 14,
        Id_insertChildAfter        = 15,
        Id_insertChildBefore       = 16,
        Id_hasOwnProperty          = 17,
        Id_hasComplexContent       = 18,
        Id_hasSimpleContent        = 19,
        Id_length                  = 20,
        Id_localName               = 21,
        Id_name                    = 22,
        Id_namespace               = 23,
        Id_namespaceDeclarations   = 24,
        Id_nodeKind                = 25,
        Id_normalize               = 26,
        Id_parent                  = 27,
        Id_prependChild            = 28,
        Id_processingInstructions  = 29,
        Id_propertyIsEnumerable    = 30,
        Id_removeNamespace         = 31,
        Id_replace                 = 32,
        Id_setChildren             = 33,
        Id_setLocalName            = 34,
        Id_setName                 = 35,
        Id_setNamespace            = 36,
        Id_text                    = 37,
        Id_toString                = 38,
        Id_toXMLString             = 39,
        Id_valueOf                 = 40,

        MAX_PROTOTYPE_ID           = 40;

    protected int findPrototypeId(String s) {
        int id;
// #generated# Last update: 2007-08-20 09:04:06 EDT
        L0: { id = 0; String X = null; int c;
            L: switch (s.length()) {
            case 4: c=s.charAt(0);
                if (c=='c') { X="copy";id=Id_copy; }
                else if (c=='n') { X="name";id=Id_name; }
                else if (c=='t') { X="text";id=Id_text; }
                break L;
            case 5: X="child";id=Id_child; break L;
            case 6: c=s.charAt(0);
                if (c=='l') { X="length";id=Id_length; }
                else if (c=='p') { X="parent";id=Id_parent; }
                break L;
            case 7: c=s.charAt(0);
                if (c=='r') { X="replace";id=Id_replace; }
                else if (c=='s') { X="setName";id=Id_setName; }
                else if (c=='v') { X="valueOf";id=Id_valueOf; }
                break L;
            case 8: switch (s.charAt(2)) {
                case 'S': X="toString";id=Id_toString; break L;
                case 'd': X="nodeKind";id=Id_nodeKind; break L;
                case 'e': X="elements";id=Id_elements; break L;
                case 'i': X="children";id=Id_children; break L;
                case 'm': X="comments";id=Id_comments; break L;
                case 'n': X="contains";id=Id_contains; break L;
                } break L;
            case 9: switch (s.charAt(2)) {
                case 'c': X="localName";id=Id_localName; break L;
                case 'm': X="namespace";id=Id_namespace; break L;
                case 'r': X="normalize";id=Id_normalize; break L;
                case 't': X="attribute";id=Id_attribute; break L;
                } break L;
            case 10: c=s.charAt(0);
                if (c=='a') { X="attributes";id=Id_attributes; }
                else if (c=='c') { X="childIndex";id=Id_childIndex; }
                break L;
            case 11: switch (s.charAt(0)) {
                case 'a': X="appendChild";id=Id_appendChild; break L;
                case 'c': X="constructor";id=Id_constructor; break L;
                case 'd': X="descendants";id=Id_descendants; break L;
                case 's': X="setChildren";id=Id_setChildren; break L;
                case 't': X="toXMLString";id=Id_toXMLString; break L;
                } break L;
            case 12: c=s.charAt(0);
                if (c=='a') { X="addNamespace";id=Id_addNamespace; }
                else if (c=='p') { X="prependChild";id=Id_prependChild; }
                else if (c=='s') {
                    c=s.charAt(3);
                    if (c=='L') { X="setLocalName";id=Id_setLocalName; }
                    else if (c=='N') { X="setNamespace";id=Id_setNamespace; }
                }
                break L;
            case 14: X="hasOwnProperty";id=Id_hasOwnProperty; break L;
            case 15: X="removeNamespace";id=Id_removeNamespace; break L;
            case 16: c=s.charAt(0);
                if (c=='h') { X="hasSimpleContent";id=Id_hasSimpleContent; }
                else if (c=='i') { X="insertChildAfter";id=Id_insertChildAfter; }
                break L;
            case 17: c=s.charAt(3);
                if (c=='C') { X="hasComplexContent";id=Id_hasComplexContent; }
                else if (c=='c') { X="inScopeNamespaces";id=Id_inScopeNamespaces; }
                else if (c=='e') { X="insertChildBefore";id=Id_insertChildBefore; }
                break L;
            case 20: X="propertyIsEnumerable";id=Id_propertyIsEnumerable; break L;
            case 21: X="namespaceDeclarations";id=Id_namespaceDeclarations; break L;
            case 22: X="processingInstructions";id=Id_processingInstructions; break L;
            }
            if (X!=null && X!=s && !X.equals(s)) id = 0;
            break L0;
        }
// #/generated#
        return id;
    }
// #/string_id_map#

    protected void initPrototypeId(int id) {
        String s;
        int arity;
        switch (id) {
            case Id_constructor: {
                IdFunctionObject ctor;
                if (this instanceof XML) {
                    ctor = new XMLCtor((XML)this, XMLOBJECT_TAG, id, 1);
                } else {
                    ctor = new IdFunctionObject(this, XMLOBJECT_TAG, id, 1);
                }
                initPrototypeConstructor(ctor);
                return;
            }

            case Id_addNamespace:      arity=1; s="addNamespace";      break;
            case Id_appendChild:       arity=1; s="appendChild";       break;
            case Id_attribute:         arity=1; s="attribute";         break;
            case Id_attributes:        arity=0; s="attributes";        break;
            case Id_child:             arity=1; s="child";             break;
            case Id_childIndex:        arity=0; s="childIndex";        break;
            case Id_children:          arity=0; s="children";          break;
            case Id_comments:          arity=0; s="comments";          break;
            case Id_contains:          arity=1; s="contains";          break;
            case Id_copy:              arity=0; s="copy";              break;
            case Id_descendants:       arity=1; s="descendants";       break;
            case Id_elements:          arity=1; s="elements";          break;
            case Id_hasComplexContent: arity=0; s="hasComplexContent"; break;
            case Id_hasOwnProperty:    arity=1; s="hasOwnProperty";    break;
            case Id_hasSimpleContent:  arity=0; s="hasSimpleContent";  break;
            case Id_inScopeNamespaces: arity=0; s="inScopeNamespaces"; break;
            case Id_insertChildAfter:  arity=2; s="insertChildAfter";  break;
            case Id_insertChildBefore: arity=2; s="insertChildBefore"; break;