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
|
// Copyright (c) 2012 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_FAVICON_FAVICON_TAB_HELPER_H_
#define CHROME_BROWSER_FAVICON_FAVICON_TAB_HELPER_H_
#include <vector>
#include "base/basictypes.h"
#include "base/callback.h"
#include "chrome/browser/favicon/favicon_handler_delegate.h"
#include "content/public/browser/web_contents_observer.h"
#include "content/public/browser/web_contents_user_data.h"
#include "content/public/common/favicon_url.h"
namespace gfx {
class Image;
}
class GURL;
class FaviconHandler;
class Profile;
class SkBitmap;
// FaviconTabHelper works with FaviconHandlers to fetch the favicons.
//
// FetchFavicon fetches the given page's icons. It requests the icons from the
// history backend. If the icon is not available or expired, the icon will be
// downloaded and saved in the history backend.
//
class FaviconTabHelper : public content::WebContentsObserver,
public FaviconHandlerDelegate,
public content::WebContentsUserData<FaviconTabHelper> {
public:
virtual ~FaviconTabHelper();
// Initiates loading the favicon for the specified url.
void FetchFavicon(const GURL& url);
// Returns the favicon for this tab, or IDR_DEFAULT_FAVICON if the tab does
// not have a favicon. The default implementation uses the current navigation
// entry. This will return an empty bitmap if there are no navigation
// entries, which should rarely happen.
gfx::Image GetFavicon() const;
// Returns true if we have the favicon for the page.
bool FaviconIsValid() const;
// Returns whether the favicon should be displayed. If this returns false, no
// space is provided for the favicon, and the favicon is never displayed.
virtual bool ShouldDisplayFavicon();
// Allows the client to determine if they want to fetch the Favicons as
// they are discovered.
void set_should_fetch_icons(bool fetch) {
should_fetch_icons_ = fetch;
}
// content::WebContentsObserver override. Must be public, because also
// called from PrerenderContents.
virtual void DidUpdateFaviconURL(
int32 page_id,
const std::vector<content::FaviconURL>& candidates) OVERRIDE;
// Saves the favicon for the current page.
void SaveFavicon();
// FaviconHandlerDelegate methods.
virtual content::NavigationEntry* GetActiveEntry() OVERRIDE;
virtual int StartDownload(const GURL& url, int image_size) OVERRIDE;
virtual void NotifyFaviconUpdated(bool icon_url_changed) OVERRIDE;
// Favicon download callback.
void DidDownloadFavicon(
int id,
int http_status_code,
const GURL& image_url,
int requested_size,
const std::vector<SkBitmap>& bitmaps);
private:
explicit FaviconTabHelper(content::WebContents* web_contents);
friend class content::WebContentsUserData<FaviconTabHelper>;
// content::WebContentsObserver overrides.
virtual void NavigateToPendingEntry(
const GURL& url,
content::NavigationController::ReloadType reload_type) OVERRIDE;
virtual void DidNavigateMainFrame(
const content::LoadCommittedDetails& details,
const content::FrameNavigateParams& params) OVERRIDE;
Profile* profile_;
bool should_fetch_icons_;
scoped_ptr<FaviconHandler> favicon_handler_;
// Handles downloading touchicons. It is NULL if
// browser_defaults::kEnableTouchIcon is false.
scoped_ptr<FaviconHandler> touch_icon_handler_;
DISALLOW_COPY_AND_ASSIGN(FaviconTabHelper);
};
#endif // CHROME_BROWSER_FAVICON_FAVICON_TAB_HELPER_H_
|
