+/*
+ * This file is part of the PulseView project.
+ *
+ * Copyright (C) 2014 Joel Holdsworth <joel@airwebreathe.org.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef PULSEVIEW_PV_VIEW_VIEWITEMITERATOR_HPP
+#define PULSEVIEW_PV_VIEW_VIEWITEMITERATOR_HPP
+
+#include <algorithm>
+#include <cassert>
+#include <iterator>
+#include <memory>
+#include <stack>
+#include <type_traits>
+#include <vector>
+
+#include <pv/session.hpp>
+
+namespace pv {
+namespace view {
+
+template<class Owner, class Item> class ViewItemIterator
+{
+public:
+ typedef typename std::conditional<std::is_const<Owner>::value,
+ typename Owner::item_list::const_iterator,
+ typename Owner::item_list::iterator>::type child_iterator;
+
+ typedef std::shared_ptr<Item> value_type;
+ typedef ptrdiff_t difference_type;
+ typedef value_type pointer;
+ typedef value_type& reference;
+ typedef std::forward_iterator_tag iterator_category;
+
+public:
+ ViewItemIterator(Owner *owner) :
+ owner_stack_({owner}) {}
+
+ ViewItemIterator(Owner *owner, child_iterator iter) :
+ owner_stack_({owner}) {
+ assert(owner);
+ if (iter != owner->child_items().end())
+ iter_stack_.push(iter);
+ }
+
+ ViewItemIterator(const ViewItemIterator<Owner, Item> &o) :
+ owner_stack_(o.owner_stack_),
+ iter_stack_(o.iter_stack_) {}
+
+ reference operator*() const {
+ return *iter_stack_.top();
+ }
+
+ reference operator->() const {
+ return *this;
+ }
+
+ ViewItemIterator<Owner, Item>& operator++() {
+ using std::dynamic_pointer_cast;
+ using std::shared_ptr;
+
+ assert(!owner_stack_.empty());
+ assert(!iter_stack_.empty());
+
+ shared_ptr<Owner> owner(dynamic_pointer_cast<Owner>(
+ *iter_stack_.top()));
+ if (owner && !owner->child_items().empty()) {
+ owner_stack_.push(owner.get());
+ iter_stack_.push(owner->child_items().begin());
+ } else {
+ while (!iter_stack_.empty() && (++iter_stack_.top()) ==
+ owner_stack_.top()->child_items().end()) {
+ owner_stack_.pop();
+ iter_stack_.pop();
+ }
+ }
+
+ return *this;
+ }
+
+ ViewItemIterator<Owner, Item> operator++(int) {
+ ViewItemIterator<Owner, Item> pre = *this;
+ ++*this;
+ return pre;
+ }
+
+ bool operator==(const ViewItemIterator &o) const {
+ return (iter_stack_.empty() && o.iter_stack_.empty()) || (
+ iter_stack_.size() == o.iter_stack_.size() &&
+ owner_stack_.top() == o.owner_stack_.top() &&
+ iter_stack_.top() == o.iter_stack_.top());
+ }
+
+ bool operator!=(const ViewItemIterator &o) const {
+ return !((const ViewItemIterator&)*this == o);
+ }
+
+ void swap(ViewItemIterator<Owner, Item>& other) {
+ swap(owner_stack_, other.owner_stack_);
+ swap(iter_stack_, other.iter_stack_);
+ }
+
+private:
+ std::stack<Owner*> owner_stack_;
+ std::stack<child_iterator> iter_stack_;
+};
+
+template<class Owner, class Item>
+void swap(ViewItemIterator<Owner, Item>& a, ViewItemIterator<Owner, Item>& b)
+{
+ a.swap(b);
+}
+
+} // namespace view
+} // namespace pv
+
+#endif // PULSEVIEW_PV_VIEW_VIEWITEMITERATOR_HPP
projects / pulseview.git / commitdiff