linkiterator.cpp

   1 // Copyright 2005 Ben Hutchings <ben@decadentplace.org.uk>.
   2 // See the file "COPYING" for licence details.
   3
   4 #include "linkiterator.hpp"
   5
   6 #include <cassert>
   7
   8 #include <nsIDOMHTMLCollection.h>
   9 #include <nsIDOMHTMLDocument.h>
  10
  11 LinkIterator::LinkIterator()
  12 {}
  13
  14 LinkIterator::LinkIterator(nsIDOMDocument * document)
  15 {
  16     nsCOMPtr<nsIDOMHTMLDocument> htmlDoc(do_QueryInterface(document));
  17     if (!htmlDoc)
  18         return;
  19
  20     htmlDoc->GetLinks(getter_AddRefs(collection_));
  21     assert(collection_);
  22
  23     index_ = 0;
  24     length_ = 0;
  25     collection_->GetLength(&length_);
  26     if (length_ == 0)
  27         collection_ = 0;
  28 }
  29
  30 already_AddRefed<nsIDOMNode> LinkIterator::operator*() const
  31 {
  32     assert(collection_);
  33     nsIDOMNode * result = 0;
  34     collection_->Item(index_, &result);
  35     assert(result);
  36     return dont_AddRef(result);
  37 }
  38
  39 LinkIterator & LinkIterator::operator++()
  40 {
  41     assert(collection_);
  42     ++index_;
  43     if (index_ == length_)
  44         collection_ = 0;
  45     return *this;
  46 }
  47
  48 bool LinkIterator::operator==(const LinkIterator & other) const
  49 {
  50     return (collection_ == other.collection_
  51             && (!collection_ || index_ == other.index_));
  52 }