X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=src%2Fsupport%2Flimited_stack.h;h=b17eeae19dbca92efecaedff761a8f40d73d8744;hb=8d640dc77608bedddb5b00982c23665584f52d21;hp=8b709758a796d8b23bd2353184fc5cc473617578;hpb=cf392753f316be94b1ff410dd1ff1fa52c70fa4f;p=lyx.git

diff --git a/src/support/limited_stack.h b/src/support/limited_stack.h
index 8b709758a7..b17eeae19d 100644
--- a/src/support/limited_stack.h
+++ b/src/support/limited_stack.h
@@ -1,19 +1,24 @@
 // -*- C++ -*-
 /**
  * \file limited_stack.h
- * Copyright 2002 the LyX Team
- * Read the file COPYING
+ * This file is part of LyX, the document processor.
+ * Licence details can be found in the file COPYING.
  *
- * \author John Levon <moz@compsoc.man.ac.uk>
+ * \author John Levon
+ *
+ * Full author contact details are available in file CREDITS.
  */
 
 #ifndef LIMITED_STACK_H
 #define LIMITED_STACK_H
 
-#include <list>
+#include <deque>
+
+
+namespace lyx {
 
 /**
- * limited_stack - a stack of limited size
+ * limited_stack - A stack of limited size.
  *
  * Like a normal stack, but elements falling out
  * of the bottom are destructed.
@@ -21,55 +26,75 @@
 template <typename T>
 class limited_stack {
 public:
-	typedef std::list<T> container_type;
+	typedef std::deque<T> container_type;
 	typedef typename container_type::value_type value_type;
 	typedef typename container_type::size_type size_type;
- 
+	typedef typename container_type::const_iterator const_iterator;
+
 	/// limit is the maximum size of the stack
-	limited_stack(size_type limit = 10) {
+	limited_stack(size_type limit = 100) {
 		limit_ = limit;
 	}
 
-	/// return the top element
-	value_type top() {
+	/// Return the top element.
+	value_type & top() {
 		return c_.front();
 	}
 
-	/// pop and throw away the top element
+	/// Pop and throw away the top element.
 	void pop() {
 		c_.pop_front();
 	}
- 
-	/// return true if the stack is empty
+
+	/// Return true if the stack is empty.
 	bool empty() const {
-		return c_.size() == 0;
+		return c_.empty();
 	}
 
-	/// clear all elements, deleting them
+	/// Clear all elements, deleting them.
 	void clear() {
-		while (!c_.empty()) {
-			c_.pop_back();
-		}
+		c_.clear();
 	}
- 
-	/// push an item on to the stack, deleting the
+
+	/// Push an item on to the stack, deleting the
 	/// bottom item on overflow.
 	void push(value_type const & v) {
 		c_.push_front(v);
 		if (c_.size() > limit_) {
-			c_.pop_back(); 
+			c_.pop_back();
 		}
 	}
- 
+
+	/// Direct read access to intermediate elements.
+	T const & operator[](size_type pos) const {
+		return c_[pos];
+	}
+
+	/// Read access to used size.
+	size_type size() const {
+		return c_.size();
+	}
+
+	const_iterator begin() const {
+		return c_.begin();
+	}
+
+	const_iterator end() const {
+		return c_.end();
+	}
+
 private:
-	/// internal contents
+	/// Internal contents.
 	container_type c_;
-	/// the maximum number elements stored
+	/// The maximum number elements stored.
 	size_type limit_;
 };
 
-// make pointer type an error.
+// Make pointer type an error.
 template <typename T>
 class limited_stack<T*>;
- 
+
+
+} // namespace lyx
+
 #endif // LIMITED_STACK_H