src/chrome/browser/ui/search/search_delegate.cc

   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 "chrome/browser/ui/search/search_delegate.h"
   6
   7 #include "chrome/browser/ui/search/search_model.h"
   8 #include "chrome/browser/ui/search/search_tab_helper.h"
   9
  10 SearchDelegate::SearchDelegate(SearchModel* browser_search_model)
  11     : browser_model_(browser_search_model),
  12       tab_model_() {
  13 }
  14
  15 SearchDelegate::~SearchDelegate() {
  16   DCHECK(!tab_model_) << "All tabs should have been deactivated or closed.";
  17 }
  18
  19 void SearchDelegate::ModelChanged(const SearchModel::State& old_state,
  20                                   const SearchModel::State& new_state) {
  21   browser_model_->SetState(new_state);
  22 }
  23
  24 void SearchDelegate::OnTabActivated(content::WebContents* web_contents) {
  25   if (tab_model_)
  26     tab_model_->RemoveObserver(this);
  27   tab_model_ = SearchTabHelper::FromWebContents(web_contents)->model();
  28   browser_model_->SetState(tab_model_->state());
  29   tab_model_->AddObserver(this);
  30 }
  31
  32 void SearchDelegate::OnTabDeactivated(content::WebContents* web_contents) {
  33   StopObservingTab(web_contents);
  34 }
  35
  36 void SearchDelegate::OnTabDetached(content::WebContents* web_contents) {
  37   StopObservingTab(web_contents);
  38 }
  39
  40 void SearchDelegate::StopObservingTab(content::WebContents* web_contents) {
  41   SearchTabHelper* search_tab_helper =
  42       SearchTabHelper::FromWebContents(web_contents);
  43   if (search_tab_helper->model() == tab_model_) {
  44     tab_model_->RemoveObserver(this);
  45     tab_model_ = NULL;
  46   }
  47 }