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/app_list/views/search_result_list_view.h" 6 7 #include <algorithm> 8 9 #include "base/bind.h" 10 #include "base/message_loop/message_loop.h" 11 #include "ui/app_list/search_result_list_view_delegate.h" 12 #include "ui/app_list/views/search_result_view.h" 13 #include "ui/base/events/event.h" 14 #include "ui/views/layout/box_layout.h" 15 16 namespace { 17 18 const int kMaxResults = 6; 19 20 } // namespace 21 22 namespace app_list { 23 24 SearchResultListView::SearchResultListView( 25 SearchResultListViewDelegate* delegate) 26 : delegate_(delegate), 27 results_(NULL), 28 last_visible_index_(0), 29 selected_index_(-1), 30 update_factory_(this) { 31 SetLayoutManager( 32 new views::BoxLayout(views::BoxLayout::kVertical, 0, 0, 0)); 33 34 for (int i = 0; i < kMaxResults; ++i) 35 AddChildView(new SearchResultView(this, this)); 36 } 37 38 SearchResultListView::~SearchResultListView() { 39 if (results_) 40 results_->RemoveObserver(this); 41 } 42 43 void SearchResultListView::SetResults(AppListModel::SearchResults* results) { 44 if (results_) 45 results_->RemoveObserver(this); 46 47 results_ = results; 48 if (results_) 49 results_->AddObserver(this); 50 51 Update(); 52 } 53 54 void SearchResultListView::SetSelectedIndex(int selected_index) { 55 if (selected_index_ == selected_index) 56 return; 57 58 if (selected_index_ >= 0) 59 GetResultViewAt(selected_index_)->SchedulePaint(); 60 61 selected_index_ = selected_index; 62 63 if (selected_index_ >= 0) 64 GetResultViewAt(selected_index_)->SchedulePaint(); 65 } 66 67 bool SearchResultListView::IsResultViewSelected( 68 const SearchResultView* result_view) const { 69 if (selected_index_ < 0) 70 return false; 71 72 return static_cast<const SearchResultView*>(child_at(selected_index_)) == 73 result_view; 74 } 75 76 bool SearchResultListView::OnKeyPressed(const ui::KeyEvent& event) { 77 switch (event.key_code()) { 78 case ui::VKEY_TAB: 79 if (event.IsShiftDown()) 80 SetSelectedIndex(std::max(selected_index_ - 1, 0)); 81 else 82 SetSelectedIndex(std::min(selected_index_ + 1, last_visible_index_)); 83 return true; 84 case ui::VKEY_UP: 85 SetSelectedIndex(std::max(selected_index_ - 1, 0)); 86 return true; 87 case ui::VKEY_DOWN: 88 SetSelectedIndex(std::min(selected_index_ + 1, last_visible_index_)); 89 return true; 90 case ui::VKEY_RETURN: 91 if (selected_index_ >= 0) 92 SearchResultActivated(GetResultViewAt(selected_index_), event.flags()); 93 return true; 94 default: 95 break; 96 } 97 return false; 98 } 99 100 SearchResultView* SearchResultListView::GetResultViewAt(int index) { 101 DCHECK(index >= 0 && index < child_count()); 102 return static_cast<SearchResultView*>(child_at(index)); 103 } 104 105 void SearchResultListView::Update() { 106 last_visible_index_ = 0; 107 for (size_t i = 0; i < static_cast<size_t>(child_count()); ++i) { 108 SearchResultView* result_view = GetResultViewAt(i); 109 if (i < results_->item_count()) { 110 result_view->SetResult(results_->GetItemAt(i)); 111 result_view->SetVisible(true); 112 last_visible_index_ = i; 113 } else { 114 result_view->SetResult(NULL); 115 result_view->SetVisible(false); 116 } 117 } 118 if (selected_index_ > last_visible_index_) 119 SetSelectedIndex(last_visible_index_); 120 121 Layout(); 122 update_factory_.InvalidateWeakPtrs(); 123 } 124 125 void SearchResultListView::ScheduleUpdate() { 126 // When search results are added one by one, each addition generates an update 127 // request. Consolidates those update requests into one Update call. 128 if (!update_factory_.HasWeakPtrs()) { 129 base::MessageLoop::current()->PostTask( 130 FROM_HERE, 131 base::Bind(&SearchResultListView::Update, 132 update_factory_.GetWeakPtr())); 133 } 134 } 135 136 void SearchResultListView::ListItemsAdded(size_t start, size_t count) { 137 ScheduleUpdate(); 138 } 139 140 void SearchResultListView::ListItemsRemoved(size_t start, size_t count) { 141 size_t last = std::min(start + count, static_cast<size_t>(child_count())); 142 for (size_t i = start; i < last; ++i) 143 GetResultViewAt(i)->ClearResultNoRepaint(); 144 145 ScheduleUpdate(); 146 } 147 148 void SearchResultListView::ListItemMoved(size_t index, size_t target_index) { 149 NOTREACHED(); 150 } 151 152 void SearchResultListView::ListItemsChanged(size_t start, size_t count) { 153 ScheduleUpdate(); 154 } 155 156 void SearchResultListView::SearchResultActivated(SearchResultView* view, 157 int event_flags) { 158 if (delegate_ && view->result()) 159 delegate_->OpenResult(view->result(), event_flags); 160 } 161 162 void SearchResultListView::SearchResultActionActivated(SearchResultView* view, 163 size_t action_index, 164 int event_flags) { 165 if (delegate_ && view->result()) { 166 delegate_->InvokeResultAction( 167 view->result(), action_index, event_flags); 168 } 169 } 170 171 void SearchResultListView::OnSearchResultInstalled(SearchResultView* view) { 172 if (delegate_ && view->result()) 173 delegate_->OnResultInstalled(view->result()); 174 } 175 176 void SearchResultListView::OnSearchResultUninstalled(SearchResultView* view) { 177 if (delegate_ && view->result()) 178 delegate_->OnResultUninstalled(view->result()); 179 } 180 181 } // namespace app_list 182