ui/app_list/views/search_result_container_view.cc

// Copyright (c) 2014 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/views/search_result_container_view.h"

#include "base/bind.h"
#include "base/message_loop/message_loop.h"

namespace app_list {

SearchResultContainerView::SearchResultContainerView()
    : results_(NULL), update_factory_(this) {
}

SearchResultContainerView::~SearchResultContainerView() {
  if (results_)
    results_->RemoveObserver(this);
}

void SearchResultContainerView::SetResults(
    AppListModel::SearchResults* results) {
  if (results_)
    results_->RemoveObserver(this);

  results_ = results;
  if (results_)
    results_->AddObserver(this);

  Update();
}

void SearchResultContainerView::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()) {
    base::MessageLoop::current()->PostTask(
        FROM_HERE,
        base::Bind(&SearchResultContainerView::DoUpdate,
                   update_factory_.GetWeakPtr()));
  }
}

void SearchResultContainerView::ListItemsAdded(size_t start, size_t count) {
  ScheduleUpdate();
}

void SearchResultContainerView::ListItemsRemoved(size_t start, size_t count) {
  ScheduleUpdate();
}

void SearchResultContainerView::ListItemMoved(size_t index,
                                              size_t target_index) {
  ScheduleUpdate();
}

void SearchResultContainerView::ListItemsChanged(size_t start, size_t count) {
  ScheduleUpdate();
}

void SearchResultContainerView::DoUpdate() {
  Update();
  update_factory_.InvalidateWeakPtrs();
}

}  // namespace app_list