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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/app_list/search_result_list_view.h"
#include <algorithm>
#include "base/bind.h"
#include "base/message_loop.h"
#include "ui/app_list/search_result_view.h"
#include "ui/app_list/search_result_list_view_delegate.h"
#include "ui/base/event.h"
#include "ui/views/layout/box_layout.h"
namespace {
const int kMaxResults = 6;
} // namespace
namespace app_list {
SearchResultListView::SearchResultListView(
SearchResultListViewDelegate* delegate)
: delegate_(delegate),
results_(NULL),
last_visible_index_(0),
selected_index_(-1),
ALLOW_THIS_IN_INITIALIZER_LIST(update_factory_(this)) {
SetLayoutManager(
new views::BoxLayout(views::BoxLayout::kVertical, 0, 0, 0));
for (int i = 0; i < kMaxResults; ++i)
AddChildView(new SearchResultView(this, this));
}
SearchResultListView::~SearchResultListView() {
if (results_)
results_->RemoveObserver(this);
}
void SearchResultListView::SetResults(AppListModel::SearchResults* results) {
if (results_)
results_->RemoveObserver(this);
results_ = results;
if (results_)
results_->AddObserver(this);
Update();
}
void SearchResultListView::SetSelectedIndex(int selected_index) {
if (selected_index_ == selected_index)
return;
if (selected_index_ >= 0)
GetResultViewAt(selected_index_)->SchedulePaint();
selected_index_ = selected_index;
if (selected_index_ >= 0)
GetResultViewAt(selected_index_)->SchedulePaint();
}
bool SearchResultListView::IsResultViewSelected(
const SearchResultView* result_view) const {
if (selected_index_ < 0)
return false;
return static_cast<const SearchResultView*>(child_at(selected_index_)) ==
result_view;
}
bool SearchResultListView::OnKeyPressed(const ui::KeyEvent& event) {
switch (event.key_code()) {
case ui::VKEY_UP:
SetSelectedIndex(std::max(selected_index_ - 1, 0));
return true;
case ui::VKEY_DOWN:
SetSelectedIndex(std::min(selected_index_ + 1, last_visible_index_));
return true;
case ui::VKEY_RETURN:
if (selected_index_ >= 0)
SearchResultActivated(GetResultViewAt(selected_index_), event);
return true;
default:
break;
}
return false;
}
SearchResultView* SearchResultListView::GetResultViewAt(int index) {
DCHECK(index >= 0 && index < child_count());
return static_cast<SearchResultView*>(child_at(index));
}
void SearchResultListView::Update() {
last_visible_index_ = 0;
for (size_t i = 0; i < static_cast<size_t>(child_count()); ++i) {
SearchResultView* result_view = GetResultViewAt(i);
if (i < results_->item_count()) {
result_view->SetResult(results_->GetItemAt(i));
result_view->SetVisible(true);
last_visible_index_ = i;
} else {
result_view->SetResult(NULL);
result_view->SetVisible(false);
}
}
if (selected_index_ > last_visible_index_)
SetSelectedIndex(last_visible_index_);
Layout();
update_factory_.InvalidateWeakPtrs();
}
void SearchResultListView::ScheduleUpdate() {
// When search results are added one by one, each addition generates an update
// request. Consolidates those update requests into one Update call.
if (!update_factory_.HasWeakPtrs()) {
MessageLoop::current()->PostTask(
FROM_HERE,
base::Bind(&SearchResultListView::Update,
update_factory_.GetWeakPtr()));
}
}
void SearchResultListView::ListItemsAdded(size_t start, size_t count) {
ScheduleUpdate();
}
void SearchResultListView::ListItemsRemoved(size_t start, size_t count) {
size_t last = std::min(start + count, static_cast<size_t>(child_count()));
for (size_t i = start; i < last; ++i)
GetResultViewAt(i)->ClearResultNoRepaint();
ScheduleUpdate();
}
void SearchResultListView::ListItemsChanged(size_t start, size_t count) {
ScheduleUpdate();
}
void SearchResultListView::SearchResultActivated(SearchResultView* view,
const ui::Event& event) {
if (delegate_ && view->result())
delegate_->OpenResult(*(view->result()), event.flags());
}
void SearchResultListView::SearchResultActionActivated(SearchResultView* view,
int action_index,
const ui::Event& event) {
if (delegate_ && view->result()) {
delegate_->InvokeResultAction(
*(view->result()), action_index, event.flags());
}
}
} // namespace app_list
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