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/webui/instant_ui.h"
6
7#include "base/bind.h"
8#include "base/prefs/pref_service.h"
9#include "base/strings/stringprintf.h"
10#include "base/time/time.h"
11#include "chrome/browser/profiles/profile.h"
12#include "chrome/browser/ui/browser.h"
13#include "chrome/browser/ui/browser_finder.h"
14#include "chrome/browser/ui/browser_instant_controller.h"
15#include "chrome/browser/ui/search/instant_controller.h"
16#include "chrome/common/pref_names.h"
17#include "chrome/common/url_constants.h"
18#include "components/user_prefs/pref_registry_syncable.h"
19#include "content/public/browser/web_ui.h"
20#include "content/public/browser/web_ui_data_source.h"
21#include "content/public/browser/web_ui_message_handler.h"
22#include "grit/browser_resources.h"
23
24namespace {
25
26content::WebUIDataSource* CreateInstantHTMLSource() {
27  content::WebUIDataSource* source =
28      content::WebUIDataSource::Create(chrome::kChromeUIInstantHost);
29  source->SetJsonPath("strings.js");
30  source->AddResourcePath("instant.js", IDR_INSTANT_JS);
31  source->AddResourcePath("instant.css", IDR_INSTANT_CSS);
32  source->SetDefaultResource(IDR_INSTANT_HTML);
33  return source;
34}
35
36std::string FormatTime(int64 time) {
37  base::Time::Exploded exploded;
38  base::Time::FromInternalValue(time).UTCExplode(&exploded);
39  return base::StringPrintf("%04d-%02d-%02d %02d:%02d:%02d.%03d",
40      exploded.year, exploded.month, exploded.day_of_month,
41      exploded.hour, exploded.minute, exploded.second, exploded.millisecond);
42}
43
44// This class receives JavaScript messages from the renderer.
45// Note that the WebUI infrastructure runs on the UI thread, therefore all of
46// this class's methods are expected to run on the UI thread.
47class InstantUIMessageHandler
48    : public content::WebUIMessageHandler,
49      public base::SupportsWeakPtr<InstantUIMessageHandler> {
50 public:
51  InstantUIMessageHandler();
52  virtual ~InstantUIMessageHandler();
53
54  // WebUIMessageHandler implementation.
55  virtual void RegisterMessages() OVERRIDE;
56
57 private:
58  void GetPreferenceValue(const base::ListValue* args);
59  void SetPreferenceValue(const base::ListValue* args);
60  void GetDebugInfo(const base::ListValue* value);
61  void ClearDebugInfo(const base::ListValue* value);
62
63  DISALLOW_COPY_AND_ASSIGN(InstantUIMessageHandler);
64};
65
66InstantUIMessageHandler::InstantUIMessageHandler() {}
67
68InstantUIMessageHandler::~InstantUIMessageHandler() {}
69
70void InstantUIMessageHandler::RegisterMessages() {
71  web_ui()->RegisterMessageCallback(
72      "getPreferenceValue",
73      base::Bind(&InstantUIMessageHandler::GetPreferenceValue,
74                 base::Unretained(this)));
75  web_ui()->RegisterMessageCallback(
76      "setPreferenceValue",
77      base::Bind(&InstantUIMessageHandler::SetPreferenceValue,
78                 base::Unretained(this)));
79  web_ui()->RegisterMessageCallback(
80      "getDebugInfo",
81      base::Bind(&InstantUIMessageHandler::GetDebugInfo,
82                 base::Unretained(this)));
83  web_ui()->RegisterMessageCallback(
84      "clearDebugInfo",
85      base::Bind(&InstantUIMessageHandler::ClearDebugInfo,
86                 base::Unretained(this)));
87}
88
89void InstantUIMessageHandler::GetPreferenceValue(const base::ListValue* args) {
90  std::string pref_name;
91  if (!args->GetString(0, &pref_name)) return;
92
93  base::StringValue pref_name_value(pref_name);
94  if (pref_name == prefs::kInstantUIZeroSuggestUrlPrefix) {
95    PrefService* prefs = Profile::FromWebUI(web_ui())->GetPrefs();
96    base::StringValue arg(prefs->GetString(pref_name.c_str()));
97    web_ui()->CallJavascriptFunction(
98        "instantConfig.getPreferenceValueResult", pref_name_value, arg);
99  }
100}
101
102void InstantUIMessageHandler::SetPreferenceValue(const base::ListValue* args) {
103  std::string pref_name;
104  if (!args->GetString(0, &pref_name)) return;
105
106  if (pref_name == prefs::kInstantUIZeroSuggestUrlPrefix) {
107    std::string value;
108    if (!args->GetString(1, &value))
109      return;
110    PrefService* prefs = Profile::FromWebUI(web_ui())->GetPrefs();
111    prefs->SetString(pref_name.c_str(), value);
112  }
113}
114
115void InstantUIMessageHandler::GetDebugInfo(const base::ListValue* args) {
116#if !defined(OS_ANDROID)
117  typedef std::pair<int64, std::string> DebugEvent;
118
119  if (!web_ui()->GetWebContents())
120    return;
121  Browser* browser = chrome::FindBrowserWithWebContents(
122      web_ui()->GetWebContents());
123  if (!browser || !browser->instant_controller())
124    return;
125
126  InstantController* instant = browser->instant_controller()->instant();
127  const std::list<DebugEvent>& events = instant->debug_events();
128
129  base::DictionaryValue data;
130  base::ListValue* entries = new base::ListValue();
131  for (std::list<DebugEvent>::const_iterator it = events.begin();
132       it != events.end(); ++it) {
133    base::DictionaryValue* entry = new base::DictionaryValue();
134    entry->SetString("time", FormatTime(it->first));
135    entry->SetString("text", it->second);
136    entries->Append(entry);
137  }
138  data.Set("entries", entries);
139
140  web_ui()->CallJavascriptFunction("instantConfig.getDebugInfoResult", data);
141#endif
142}
143
144void InstantUIMessageHandler::ClearDebugInfo(const base::ListValue* args) {
145#if !defined(OS_ANDROID)
146  if (!web_ui()->GetWebContents())
147    return;
148  Browser* browser = chrome::FindBrowserWithWebContents(
149      web_ui()->GetWebContents());
150  if (!browser || !browser->instant_controller())
151    return;
152
153  browser->instant_controller()->instant()->ClearDebugEvents();
154#endif
155}
156
157}  // namespace
158
159////////////////////////////////////////////////////////////////////////////////
160// InstantUI
161
162InstantUI::InstantUI(content::WebUI* web_ui) : WebUIController(web_ui) {
163  web_ui->AddMessageHandler(new InstantUIMessageHandler());
164
165  // Set up the chrome://instant/ source.
166  Profile* profile = Profile::FromWebUI(web_ui);
167  content::WebUIDataSource::Add(profile, CreateInstantHTMLSource());
168}
169
170// static
171void InstantUI::RegisterProfilePrefs(
172    user_prefs::PrefRegistrySyncable* registry) {
173  registry->RegisterStringPref(
174      prefs::kInstantUIZeroSuggestUrlPrefix,
175      std::string(),
176      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
177}
178