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1 // Copyright 2014 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 "components/dom_distiller/ios/distiller_page_ios.h" | |
6 | |
7 #import <UIKit/UIKit.h> | |
8 | |
9 #include "base/json/json_reader.h" | |
10 #include "base/logging.h" | |
11 #include "base/strings/sys_string_conversions.h" | |
12 #include "base/values.h" | |
13 #include "grit/components_resources.h" | |
14 #include "ios/public/provider/web/web_controller_provider.h" | |
15 #include "ios/web/public/browser_state.h" | |
16 | |
17 namespace dom_distiller { | |
18 | |
19 // Helper class for observing the loading of URLs to distill. | |
20 class DistillerWebStateObserver : public web::WebStateObserver { | |
21 public: | |
22 DistillerWebStateObserver(web::WebState* web_state, | |
23 DistillerPageIOS* distiller_page); | |
24 | |
25 // WebStateObserver implementation: | |
26 void PageLoaded( | |
27 web::PageLoadCompletionStatus load_completion_status) override; | |
28 | |
29 private: | |
30 DistillerPageIOS* distiller_page_; // weak, owns this object. | |
31 }; | |
32 | |
33 DistillerWebStateObserver::DistillerWebStateObserver( | |
34 web::WebState* web_state, | |
35 DistillerPageIOS* distiller_page) | |
36 : web::WebStateObserver(web_state), distiller_page_(distiller_page) { | |
37 DCHECK(web_state); | |
38 DCHECK(distiller_page_); | |
39 } | |
40 | |
41 void DistillerWebStateObserver::PageLoaded( | |
42 web::PageLoadCompletionStatus load_completion_status) { | |
43 distiller_page_->OnLoadURLDone(load_completion_status); | |
44 } | |
45 | |
46 #pragma mark - | |
47 | |
48 DistillerPageIOS::DistillerPageIOS(web::BrowserState* browser_state) | |
49 : browser_state_(browser_state), weak_ptr_factory_(this) { | |
50 } | |
51 | |
52 DistillerPageIOS::~DistillerPageIOS() { | |
53 } | |
54 | |
55 void DistillerPageIOS::DistillPageImpl(const GURL& url, | |
56 const std::string& script) { | |
57 if (!url.is_valid() || !script.length()) | |
58 return; | |
59 url_ = url; | |
60 script_ = script; | |
61 | |
62 // Lazily create provider. | |
63 if (!provider_) { | |
64 if (ios::GetWebControllerProviderFactory()) { | |
65 provider_ = | |
66 ios::GetWebControllerProviderFactory()->CreateWebControllerProvider( | |
67 browser_state_); | |
68 web_state_observer_.reset( | |
69 new DistillerWebStateObserver(provider_->GetWebState(), this)); | |
70 } | |
71 } | |
72 | |
73 // Load page using provider. | |
74 if (provider_) { | |
75 provider_->LoadURL(url_); | |
76 } else { | |
77 OnLoadURLDone(web::PageLoadCompletionStatus::FAILURE); | |
78 } | |
noyau (Ping after 24h)
2015/02/19 09:15:43
Either put the brackets on one liner if, or don't.
sdefresne
2015/02/19 10:50:13
Done.
| |
79 } | |
80 | |
81 void DistillerPageIOS::OnLoadURLDone( | |
82 web::PageLoadCompletionStatus load_completion_status) { | |
83 // Don't attempt to distill if the page load failed or if there is no | |
84 // provider. | |
85 if (load_completion_status == web::PageLoadCompletionStatus::FAILURE || | |
86 !provider_) { | |
87 HandleJavaScriptResultString(@""); | |
88 return; | |
89 } | |
90 | |
91 // Inject the script. | |
92 base::WeakPtr<DistillerPageIOS> weak_this = weak_ptr_factory_.GetWeakPtr(); | |
93 provider_->InjectScript(script_, ^(NSString* string, NSError* error) { | |
94 weak_this->HandleJavaScriptResultString(string); | |
droger
2015/02/19 09:38:49
You need to return early if weak_this is null, or
sdefresne
2015/02/19 10:50:13
Good catch, done.
| |
95 }); | |
96 } | |
97 | |
98 void DistillerPageIOS::HandleJavaScriptResultString(NSString* result) { | |
99 scoped_ptr<base::Value> resultValue(base::Value::CreateNullValue()); | |
100 if (result.length) { | |
101 scoped_ptr<base::DictionaryValue> dictionaryValue( | |
102 static_cast<base::DictionaryValue*>( | |
103 base::JSONReader::Read(base::SysNSStringToUTF8(result)))); | |
104 if (dictionaryValue) | |
105 resultValue = dictionaryValue.Pass(); | |
106 } | |
107 OnDistillationDone(url_, resultValue.get()); | |
108 } | |
109 | |
110 } // namespace dom_distiller | |
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