child_iterator.cpp

   1 // Copyright 2005 Ben Hutchings <ben@decadent.org.uk>.
   2 // See the file "COPYING" for licence details.
   3
   4 #include "child_iterator.hpp"
   5
   6 #include <cassert>
   7
   8 #include "xpcom_support.hpp"
   9
  10 using xpcom_support::check;
  11
  12 child_iterator::child_iterator()
  13         : node_(0)
  14 {}
  15
  16 child_iterator::child_iterator(nsIDOMNode * node)
  17 {
  18     check(node->GetFirstChild(&node_));
  19 }
  20
  21 child_iterator::~child_iterator()
  22 {
  23     if (node_)
  24         node_->Release();
  25 }
  26
  27 already_AddRefed<nsIDOMNode> child_iterator::operator*() const
  28 {
  29     assert(node_);
  30     node_->AddRef();
  31     return node_;
  32 }
  33
  34 child_iterator & child_iterator::operator++()
  35 {
  36     nsIDOMNode * next;
  37     check(node_->GetNextSibling(&next));
  38     node_->Release();
  39     node_ = next;
  40     return *this;
  41 }
  42
  43 bool child_iterator::operator==(const child_iterator & other) const
  44 {
  45     return node_ == other.node_;
  46 }