1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "ui/views/view_model.h"
6
7#include "base/logging.h"
8#include "ui/views/view.h"
9
10namespace views {
11
12ViewModel::ViewModel() {
13}
14
15ViewModel::~ViewModel() {
16  // view are owned by their parent, no need to delete them.
17}
18
19void ViewModel::Add(View* view, int index) {
20  DCHECK_LE(index, static_cast<int>(entries_.size()));
21  DCHECK_GE(index, 0);
22  Entry entry;
23  entry.view = view;
24  entries_.insert(entries_.begin() + index, entry);
25}
26
27void ViewModel::Remove(int index) {
28  if (index == -1)
29    return;
30
31  check_index(index);
32  entries_.erase(entries_.begin() + index);
33}
34
35void ViewModel::Move(int index, int target_index) {
36  DCHECK_LT(index, static_cast<int>(entries_.size()));
37  DCHECK_GE(index, 0);
38  DCHECK_LT(target_index, static_cast<int>(entries_.size()));
39  DCHECK_GE(target_index, 0);
40
41  if (index == target_index)
42    return;
43  Entry entry(entries_[index]);
44  entries_.erase(entries_.begin() + index);
45  entries_.insert(entries_.begin() + target_index, entry);
46}
47
48void ViewModel::MoveViewOnly(int index, int target_index) {
49  if (index == target_index)
50    return;
51  if (target_index < index) {
52    View* view = entries_[index].view;
53    for (int i = index; i > target_index; --i)
54      entries_[i].view = entries_[i - 1].view;
55    entries_[target_index].view = view;
56  } else {
57    View* view = entries_[index].view;
58    for (int i = index; i < target_index; ++i)
59      entries_[i].view = entries_[i + 1].view;
60    entries_[target_index].view = view;
61  }
62}
63
64void ViewModel::Clear() {
65  Entries entries;
66  entries.swap(entries_);
67  for (size_t i = 0; i < entries.size(); ++i)
68    delete entries[i].view;
69}
70
71int ViewModel::GetIndexOfView(const View* view) const {
72  for (size_t i = 0; i < entries_.size(); ++i) {
73    if (entries_[i].view == view)
74      return static_cast<int>(i);
75  }
76  return -1;
77}
78
79}  // namespace views
80