1 // Copyright 2013 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/instant_page.h"
6
7 #include "chrome/browser/profiles/profile.h"
8 #include "chrome/browser/search/search.h"
9 #include "chrome/browser/ui/search/search_model.h"
10 #include "chrome/browser/ui/search/search_tab_helper.h"
11 #include "chrome/common/render_messages.h"
12 #include "chrome/common/url_constants.h"
13 #include "content/public/browser/navigation_controller.h"
14 #include "content/public/browser/navigation_details.h"
15 #include "content/public/browser/navigation_entry.h"
16 #include "content/public/browser/notification_service.h"
17 #include "content/public/browser/notification_source.h"
18 #include "content/public/browser/render_frame_host.h"
19 #include "content/public/browser/web_contents.h"
20 #include "content/public/common/frame_navigate_params.h"
21
~Delegate()22 InstantPage::Delegate::~Delegate() {
23 }
24
~InstantPage()25 InstantPage::~InstantPage() {
26 if (web_contents()) {
27 SearchTabHelper::FromWebContents(web_contents())->model()->RemoveObserver(
28 this);
29 }
30 }
31
supports_instant() const32 bool InstantPage::supports_instant() const {
33 return web_contents() &&
34 SearchTabHelper::FromWebContents(web_contents())->SupportsInstant();
35 }
36
instant_url() const37 const std::string& InstantPage::instant_url() const {
38 return instant_url_;
39 }
40
IsLocal() const41 bool InstantPage::IsLocal() const {
42 return web_contents() &&
43 web_contents()->GetURL() == GURL(chrome::kChromeSearchLocalNtpUrl);
44 }
45
InstantPage(Delegate * delegate,const std::string & instant_url,Profile * profile,bool is_incognito)46 InstantPage::InstantPage(Delegate* delegate, const std::string& instant_url,
47 Profile* profile, bool is_incognito)
48 : profile_(profile),
49 delegate_(delegate),
50 instant_url_(instant_url),
51 is_incognito_(is_incognito) {
52 }
53
SetContents(content::WebContents * new_web_contents)54 void InstantPage::SetContents(content::WebContents* new_web_contents) {
55 ClearContents();
56
57 if (!new_web_contents)
58 return;
59
60 Observe(new_web_contents);
61 SearchModel* model =
62 SearchTabHelper::FromWebContents(web_contents())->model();
63 model->AddObserver(this);
64
65 // Already know whether the page supports instant.
66 if (model->instant_support() != INSTANT_SUPPORT_UNKNOWN)
67 InstantSupportDetermined(model->instant_support() == INSTANT_SUPPORT_YES);
68 }
69
ShouldProcessAboutToNavigateMainFrame()70 bool InstantPage::ShouldProcessAboutToNavigateMainFrame() {
71 return false;
72 }
73
DidCommitProvisionalLoadForFrame(content::RenderFrameHost * render_frame_host,const GURL & url,ui::PageTransition)74 void InstantPage::DidCommitProvisionalLoadForFrame(
75 content::RenderFrameHost* render_frame_host,
76 const GURL& url,
77 ui::PageTransition /* transition_type */) {
78 if (!render_frame_host->GetParent() &&
79 ShouldProcessAboutToNavigateMainFrame())
80 delegate_->InstantPageAboutToNavigateMainFrame(web_contents(), url);
81 }
82
ModelChanged(const SearchModel::State & old_state,const SearchModel::State & new_state)83 void InstantPage::ModelChanged(const SearchModel::State& old_state,
84 const SearchModel::State& new_state) {
85 if (old_state.instant_support != new_state.instant_support)
86 InstantSupportDetermined(new_state.instant_support == INSTANT_SUPPORT_YES);
87 }
88
InstantSupportDetermined(bool supports_instant)89 void InstantPage::InstantSupportDetermined(bool supports_instant) {
90 delegate_->InstantSupportDetermined(web_contents(), supports_instant);
91
92 // If the page doesn't support Instant, stop listening to it.
93 if (!supports_instant)
94 ClearContents();
95 }
96
ClearContents()97 void InstantPage::ClearContents() {
98 if (web_contents()) {
99 SearchTabHelper::FromWebContents(web_contents())->model()->RemoveObserver(
100 this);
101 }
102
103 Observe(NULL);
104 }
105