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
|
// Copyright (c) 2006-2008 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.
#include "base/values.h"
#include "chrome/browser/dom_ui/web_resource_handler.h"
#include "chrome/browser/profile.h"
#include "chrome/browser/web_resource/web_resource_service.h"
#include "chrome/common/web_resource/web_resource_unpacker.h"
#include "chrome/common/pref_names.h"
namespace {
const int kNumWebResourcesToShow = 2;
// TODO(mrc): l10n
// This title should only appear the very first time Chrome is run with
// web resources enabled; otherwise the cache should be populated.
static const wchar_t* kWebResourceTitleAtStartup =
L"New: Suggestion Box!";
// This snipp should only appear the very first time Chrome is run with
// web resources enabled; otherwise the cache should be populated.
static const wchar_t* kWebResourceSnippetAtStartup =
L"Tips and recommendations to help you discover interesting websites.";
}
WebResourceHandler::WebResourceHandler(DOMUI* dom_ui)
: DOMMessageHandler(dom_ui),
dom_ui_(dom_ui) {
dom_ui->RegisterMessageCallback("getNextCachedWebResource",
NewCallback(this, &WebResourceHandler::HandleGetCachedWebResource));
web_resource_cache_ = dom_ui_->GetProfile()->GetPrefs()->
GetDictionary(prefs::kNTPWebResourceCache);
}
void WebResourceHandler::HandleGetCachedWebResource(const Value* content) {
// Eventually we will feed more than one web resource datum at a time
// to the NTP; for now, this is a list containing one item: the tip
// to be displayed.
ListValue list_value;
// Holds the web resource data found in the preferences cache.
DictionaryValue* wr_dict;
// Dictionary which will be sent back in a Javascript call.
DictionaryValue* tip_dict = new DictionaryValue();
// These values hold the data for each web resource item. As the web
// resource server solidifies, these may change.
std::wstring title;
std::wstring thumb;
std::wstring source;
std::wstring snipp;
std::wstring url;
// This should only be true on the very first Chrome run; otherwise,
// the cache should be populated.
if (web_resource_cache_ == NULL || web_resource_cache_->GetSize() < 1) {
title = kWebResourceTitleAtStartup;
snipp = kWebResourceSnippetAtStartup;
} else {
// Right now, hard-coded to simply get the first item (marked "0") in the
// resource data stored in the cache. Fail silently if data is missing.
// TODO(mrc): If data is missing, iterate through cache.
web_resource_cache_->GetDictionary(L"0", &wr_dict);
if (wr_dict &&
wr_dict->GetSize() > 0 &&
wr_dict->GetString(WebResourceService::kWebResourceTitle, &title) &&
wr_dict->GetString(WebResourceService::kWebResourceThumb, &thumb) &&
wr_dict->GetString(WebResourceService::kWebResourceSource, &source) &&
wr_dict->GetString(WebResourceService::kWebResourceSnippet, &snipp) &&
wr_dict->GetString(WebResourceService::kWebResourceURL, &url)) {
tip_dict->SetString(WebResourceService::kWebResourceTitle, title);
tip_dict->SetString(WebResourceService::kWebResourceThumb, thumb);
tip_dict->SetString(WebResourceService::kWebResourceSource, source);
tip_dict->SetString(WebResourceService::kWebResourceSnippet, snipp);
tip_dict->SetString(WebResourceService::kWebResourceURL, url);
}
}
list_value.Append(tip_dict);
// Send list of snippets back out to the DOM.
dom_ui_->CallJavascriptFunction(L"nextWebResource", list_value);
}
// static
void WebResourceHandler::RegisterUserPrefs(PrefService* prefs) {
prefs->RegisterDictionaryPref(prefs::kNTPWebResourceCache);
prefs->RegisterStringPref(prefs::kNTPWebResourceServer,
WebResourceService::kDefaultResourceServer);
}
|
