ui/views/view_model.cc

   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
  12 ViewModel::ViewModel() {
  13 }
  14
  15 ViewModel::~ViewModel() {
  16   // view are owned by their parent, no need to delete them.
  17 }
  18
  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
  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
  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
  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
  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
  71 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