1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
|
// Copyright (c) 2011 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.
#ifndef CHROME_BROWSER_UI_WEBUI_NTP_NEW_TAB_UI_H_
#define CHROME_BROWSER_UI_WEBUI_NTP_NEW_TAB_UI_H_
#pragma once
#include <string>
#include "base/gtest_prod_util.h"
#include "base/time.h"
#include "base/timer.h"
#include "chrome/browser/prefs/pref_change_registrar.h"
#include "chrome/browser/sessions/tab_restore_service.h"
#include "chrome/browser/ui/webui/chrome_url_data_manager.h"
#include "chrome/browser/ui/webui/chrome_web_ui.h"
#include "content/common/notification_observer.h"
#include "content/common/notification_registrar.h"
class GURL;
class PrefService;
class Profile;
// The TabContents used for the New Tab page.
class NewTabUI : public ChromeWebUI,
public NotificationObserver {
public:
explicit NewTabUI(TabContents* manager);
virtual ~NewTabUI();
// Override WebUI methods so we can hook up the paint timer to the render
// view host.
virtual void RenderViewCreated(RenderViewHost* render_view_host) OVERRIDE;
virtual void RenderViewReused(RenderViewHost* render_view_host) OVERRIDE;
static void RegisterUserPrefs(PrefService* prefs);
static void MigrateUserPrefs(PrefService* prefs, int old_pref_version,
int new_pref_version);
// Adds "url", "title", and "direction" keys on incoming dictionary, setting
// title as the url as a fallback on empty title.
static void SetURLTitleAndDirection(base::DictionaryValue* dictionary,
const string16& title,
const GURL& gurl);
// The current preference version.
static int current_pref_version() { return current_pref_version_; }
// Returns whether NTP4 is enabled.
static bool NTP4Enabled();
// Returns whether NTP4 bookmark features are enabled.
static bool NTP4BookmarkFeaturesEnabled();
class NewTabHTMLSource : public ChromeURLDataManager::DataSource {
public:
explicit NewTabHTMLSource(Profile* profile);
// Called when the network layer has requested a resource underneath
// the path we registered.
virtual void StartDataRequest(const std::string& path,
bool is_incognito,
int request_id) OVERRIDE;
virtual std::string GetMimeType(const std::string&) const OVERRIDE;
virtual bool ShouldReplaceExistingSource() const;
private:
virtual ~NewTabHTMLSource() {}
// Pointer back to the original profile.
Profile* profile_;
DISALLOW_COPY_AND_ASSIGN(NewTabHTMLSource);
};
private:
FRIEND_TEST_ALL_PREFIXES(NewTabUITest, UpdateUserPrefsVersion);
virtual void Observe(int type,
const NotificationSource& source,
const NotificationDetails& details);
// Reset the CSS caches.
void InitializeCSSCaches();
void StartTimingPaint(RenderViewHost* render_view_host);
void PaintTimeout();
// Updates the user prefs version and calls |MigrateUserPrefs| if needed.
// Returns true if the version was updated.
static bool UpdateUserPrefsVersion(PrefService* prefs);
// Overridden from ChromeWebUI. Determines if the bookmarks bar can be shown
// detached from the location bar.
virtual bool CanShowBookmarkBar() const OVERRIDE;
NotificationRegistrar registrar_;
// Tracks updates of the kShowBookmarkBar preference.
PrefChangeRegistrar pref_change_registrar_;
// The time when we started benchmarking.
base::TimeTicks start_;
// The last time we got a paint notification.
base::TimeTicks last_paint_;
// Scoping so we can be sure our timeouts don't outlive us.
base::OneShotTimer<NewTabUI> timer_;
// The preference version. This used for migrating prefs of the NTP.
static const int current_pref_version_ = 3;
DISALLOW_COPY_AND_ASSIGN(NewTabUI);
};
#endif // CHROME_BROWSER_UI_WEBUI_NTP_NEW_TAB_UI_H_
|
