95 lines
2.7 KiB
C++
95 lines
2.7 KiB
C++
/**
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* PANDA 3D SOFTWARE
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* Copyright (c) Carnegie Mellon University. All rights reserved.
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*
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* All use of this software is subject to the terms of the revised BSD
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* license. You should have received a copy of this license along
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* with this source code in a file named "LICENSE."
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*
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* @file xFileDataNodeReference.cxx
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* @author drose
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* @date 2004-10-08
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*/
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#include "xFileDataNodeReference.h"
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#include "indent.h"
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TypeHandle XFileDataNodeReference::_type_handle;
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/**
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*
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*/
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XFileDataNodeReference::
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XFileDataNodeReference(XFileDataNodeTemplate *object) :
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XFileDataNode(object->get_x_file(), object->get_name(),
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object->get_template()),
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_object(object)
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{
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// We steal a copy of the referenced object's children. This is just a one-
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// time copy, so if you go and change the list of children of the referenced
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// object, it won't be reflected here in the reference. Since presumably
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// the reference is only used when parsing static files, that shouldn't be a
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// problem; but you do need to be aware of it.
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_children = object->_children;
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_objects = object->_objects;
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_children_by_name = object->_children_by_name;
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}
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/**
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* Returns true if this node represents an indirect reference to an object
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* defined previously in the file. References are generally transparent, so
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* in most cases you never need to call this, unless you actually need to
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* differentiate between references and instances; you can simply use the
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* reference node as if it were itself the object it references.
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*
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* If this returns true, the node must be of type XFileDataNodeReference.
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*/
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bool XFileDataNodeReference::
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is_reference() const {
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return true;
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}
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/**
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* Returns true if this kind of data object is a complex object that can hold
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* nested data elements, false otherwise.
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*/
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bool XFileDataNodeReference::
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is_complex_object() const {
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return true;
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}
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/**
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* Writes a suitable representation of this node to an .x file in text mode.
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*/
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void XFileDataNodeReference::
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write_text(std::ostream &out, int indent_level) const {
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indent(out, indent_level)
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<< "{ " << _object->get_name() << " }\n";
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}
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/**
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* Returns the number of nested data elements within the object. This may be,
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* e.g. the size of the array, if it is an array.
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*/
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int XFileDataNodeReference::
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get_num_elements() const {
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return _object->size();
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}
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/**
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* Returns the nth nested data element within the object.
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*/
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XFileDataObject *XFileDataNodeReference::
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get_element(int n) {
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return &((*_object)[n]);
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}
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/**
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* Returns the nested data element within the object that has the indicated
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* name.
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*/
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XFileDataObject *XFileDataNodeReference::
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get_element(const std::string &name) {
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return &((*_object)[name]);
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}
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