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| 1 // Copyright 2016 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 "ash/common/system/tray/size_range_layout.h" |
| 6 |
| 7 #include "base/logging.h" |
| 8 #include "ui/views/layout/fill_layout.h" |
| 9 |
| 10 namespace ash { |
| 11 |
| 12 // static |
| 13 |
| 14 const int SizeRangeLayout::kMinSize = 0; |
| 15 |
| 16 const int SizeRangeLayout::kMaxSize = std::numeric_limits<int>::max(); |
| 17 |
| 18 gfx::Size SizeRangeLayout::MinSize() { |
| 19 return gfx::Size(kMinSize, kMinSize); |
| 20 } |
| 21 |
| 22 gfx::Size SizeRangeLayout::MaxSize() { |
| 23 return gfx::Size(kMaxSize, kMaxSize); |
| 24 } |
| 25 |
| 26 SizeRangeLayout::SizeRangeLayout() : SizeRangeLayout(MinSize(), MaxSize()) {} |
| 27 |
| 28 SizeRangeLayout::SizeRangeLayout(const gfx::Size& min_size, |
| 29 const gfx::Size& max_size) |
| 30 : layout_manager_(new views::FillLayout()), |
| 31 min_size_(min_size), |
| 32 max_size_(max_size) {} |
| 33 |
| 34 SizeRangeLayout::~SizeRangeLayout() {} |
| 35 |
| 36 void SizeRangeLayout::SetSize(const gfx::Size& size) { |
| 37 set_min_size(size); |
| 38 set_max_size(size); |
| 39 } |
| 40 |
| 41 void SizeRangeLayout::SetLayoutManager( |
| 42 std::unique_ptr<LayoutManager> layout_manager) { |
| 43 if (layout_manager_) |
| 44 layout_manager_->Uninstalled(host_); |
| 45 layout_manager_ = std::move(layout_manager); |
| 46 if (layout_manager_) |
| 47 layout_manager_->Installed(host_); |
| 48 } |
| 49 |
| 50 void SizeRangeLayout::Installed(views::View* host) { |
| 51 DCHECK(!host_); |
| 52 host_ = host; |
| 53 if (layout_manager_) |
| 54 layout_manager_->Installed(host); |
| 55 } |
| 56 |
| 57 void SizeRangeLayout::Uninstalled(views::View* host) { |
| 58 DCHECK_EQ(host_, host); |
| 59 layout_manager_->Uninstalled(host); |
| 60 host_ = nullptr; |
| 61 } |
| 62 |
| 63 void SizeRangeLayout::Layout(views::View* host) { |
| 64 if (layout_manager_) |
| 65 layout_manager_->Layout(host); |
| 66 } |
| 67 |
| 68 gfx::Size SizeRangeLayout::GetPreferredSize(const views::View* host) const { |
| 69 // TODO(bruthig): Handle Views that override GetPreferredSize(). |
| 70 gfx::Size preferred_size = |
| 71 layout_manager_ ? layout_manager_->GetPreferredSize(host) : gfx::Size(); |
| 72 ClampSizeToRange(&preferred_size); |
| 73 return preferred_size; |
| 74 } |
| 75 |
| 76 int SizeRangeLayout::GetPreferredHeightForWidth(const views::View* host, |
| 77 int width) const { |
| 78 // TODO(bruthig): Handle Views that override GetPreferredSize(). |
| 79 const int height = |
| 80 layout_manager_ ? layout_manager_->GetPreferredHeightForWidth(host, width) |
| 81 : 0; |
| 82 gfx::Size size(0, height); |
| 83 ClampSizeToRange(&size); |
| 84 return size.height(); |
| 85 } |
| 86 |
| 87 void SizeRangeLayout::ViewAdded(views::View* host, views::View* view) { |
| 88 if (layout_manager_) |
| 89 layout_manager_->ViewAdded(host, view); |
| 90 } |
| 91 |
| 92 void SizeRangeLayout::ViewRemoved(views::View* host, views::View* view) { |
| 93 if (layout_manager_) |
| 94 layout_manager_->ViewRemoved(host, view); |
| 95 } |
| 96 |
| 97 void SizeRangeLayout::ClampSizeToRange(gfx::Size* size) const { |
| 98 size->SetToMax(min_size_); |
| 99 size->SetToMin(max_size_); |
| 100 } |
| 101 |
| 102 } // namespace ash |
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