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