Add wrapper container for a vector of OwnPtr<T>

cc/own_ptr_vector.h

+// Copyright 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CC_OWN_PTR_VECTOR_H_
+#define CC_OWN_PTR_VECTOR_H_
+
+#include "base/basictypes.h"
+#include "base/stl_util.h"
+#include <wtf/PassOwnPtr.h>
+#include <wtf/OwnPtr.h>
+
+namespace cc {
+
+// This type acts like a Vector<OwnPtr> but based on top of std::vector. The
+// OwnPtrVector has ownership of all elements in the vector.
+template <typename T>
+class OwnPtrVector {
+ public:
+  typedef typename std::vector<T*>::iterator iterator;
+  typedef typename std::vector<T*>::const_iterator const_iterator;
+  typedef typename std::vector<T*>::reverse_iterator reverse_iterator;
+  typedef typename std::vector<T*>::const_reverse_iterator
+      const_reverse_iterator;
+
+  OwnPtrVector() {}
+
+  ~OwnPtrVector() { clear(); }
+
+  size_t size() const {
+    return data_.size();
+  }
+
+  T* Peek(size_t index) const {
+    ASSERT(index < size());
+    return data_[index];
+  }
+
+  T* operator[](size_t index) const {
+    return Peek(index);
+  }
+
+  T* first() const {
+    ASSERT(!isEmpty());
+    return Peek(0);
+  }
+
+  T* last() const {
+    ASSERT(!isEmpty());
+    return Peek(size() - 1);
+  }
+
+  bool isEmpty() const {
+    return size() == 0;
+  }
+
+  PassOwnPtr<T> take(size_t index) {
+    ASSERT(index < size());
+    OwnPtr<T> ret = adoptPtr(data_[index]);
+    data_[index] = NULL;
+    return ret.release();
+  }
+
+  void remove(size_t index) {
+    ASSERT(index < size());
+    delete data_[index];
+    data_.erase(data_.begin() + index);
+  }
+
+  void clear() {
+    STLDeleteElements(&data_);
+  }
+
+  void append(PassOwnPtr<T> item) {
+    data_.push_back(item.leakPtr());
+  }
+
+  void insert(size_t index, PassOwnPtr<T> item) {
+    ASSERT(index < size());
+    data_.insert(data_.begin() + index, item.leakPtr());
+  }
+
+  iterator begin() { return data_.begin(); }
+  const_iterator begin() const { return data_.begin(); }
+  iterator end() { return data_.end(); }
+  const_iterator end() const { return data_.end(); }
+
+  reverse_iterator rbegin() { return data_.rbegin(); }
+  const_reverse_iterator rbegin() const { return data_.rbegin(); }
+  reverse_iterator rend() { return data_.rend(); }
+  const_reverse_iterator rend() const { return data_.rend(); }
+
+ private:
+  std::vector<T*> data_;
+
+  DISALLOW_COPY_AND_ASSIGN(OwnPtrVector);
+};
+
+}  // namespace cc
+
+#endif  // CC_OWN_PTR_VECTOR_H_