2 * This file is part of the PulseView project.
4 * Copyright (C) 2014 Joel Holdsworth <joel@airwebreathe.org.uk>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, see <http://www.gnu.org/licenses/>.
20 #ifndef PULSEVIEW_PV_VIEWS_TRACEVIEW_VIEWITEMITERATOR_HPP
21 #define PULSEVIEW_PV_VIEWS_TRACEVIEW_VIEWITEMITERATOR_HPP
28 #include <type_traits>
31 #include <pv/session.hpp>
33 using std::dynamic_pointer_cast;
34 using std::forward_iterator_tag;
35 using std::shared_ptr;
42 template<class Owner, class Item> class ViewItemIterator
45 typedef typename Owner::item_list::const_iterator child_iterator;
46 typedef shared_ptr<Item> value_type;
47 typedef ptrdiff_t difference_type;
48 typedef value_type pointer;
49 typedef const value_type& reference;
50 typedef forward_iterator_tag iterator_category;
53 ViewItemIterator(Owner *owner) :
54 owner_stack_({owner}) {}
56 ViewItemIterator(Owner *owner, child_iterator iter) :
57 owner_stack_({owner}) {
59 if (iter != owner->child_items().end())
60 iter_stack_.push(iter);
63 ViewItemIterator(const ViewItemIterator<Owner, Item> &o) :
64 owner_stack_(o.owner_stack_),
65 iter_stack_(o.iter_stack_) {}
67 reference operator*() const {
68 return *iter_stack_.top();
71 reference operator->() const {
75 ViewItemIterator<Owner, Item>& operator++() {
76 assert(!owner_stack_.empty());
77 assert(!iter_stack_.empty());
79 shared_ptr<Owner> owner(dynamic_pointer_cast<Owner>(
81 if (owner && !owner->child_items().empty()) {
82 owner_stack_.push(owner.get());
83 iter_stack_.push(owner->child_items().begin());
85 while (!iter_stack_.empty() && (++iter_stack_.top()) ==
86 owner_stack_.top()->child_items().end()) {
95 ViewItemIterator<Owner, Item> operator++(int) {
96 ViewItemIterator<Owner, Item> pre = *this;
101 bool operator==(const ViewItemIterator &o) const {
102 return (iter_stack_.empty() && o.iter_stack_.empty()) || (
103 iter_stack_.size() == o.iter_stack_.size() &&
104 owner_stack_.top() == o.owner_stack_.top() &&
105 iter_stack_.top() == o.iter_stack_.top());
108 bool operator!=(const ViewItemIterator &o) const {
109 return !((const ViewItemIterator&)*this == o);
112 void swap(ViewItemIterator<Owner, Item>& other) {
113 swap(owner_stack_, other.owner_stack_);
114 swap(iter_stack_, other.iter_stack_);
118 stack<Owner*> owner_stack_;
119 stack<child_iterator> iter_stack_;
122 template<class Owner, class Item>
123 void swap(ViewItemIterator<Owner, Item>& a, ViewItemIterator<Owner, Item>& b)
132 #endif // PULSEVIEW_PV_VIEWS_TRACEVIEW_VIEWITEMITERATOR_HPP