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
10 namespace views {
11
ViewModel()12 ViewModel::ViewModel() {
13 }
14
~ViewModel()15 ViewModel::~ViewModel() {
16 // view are owned by their parent, no need to delete them.
17 }
18
Add(View * view,int index)19 void 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
Remove(int index)27 void ViewModel::Remove(int index) {
28 if (index == -1)
29 return;
30
31 check_index(index);
32 entries_.erase(entries_.begin() + index);
33 }
34
Move(int index,int target_index)35 void 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
MoveViewOnly(int index,int target_index)48 void 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
Clear()64 void 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
GetIndexOfView(const View * view) const71 int 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