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1 // Copyright 2017 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 #import "ios/shared/chrome/browser/tabs/web_state_list.h" | |
6 | |
7 #include "base/logging.h" | |
8 #include "base/memory/ptr_util.h" | |
9 #import "ios/shared/chrome/browser/tabs/web_state_list_observer.h" | |
10 #import "ios/web/public/web_state/web_state.h" | |
11 | |
12 #if !defined(__has_feature) || !__has_feature(objc_arc) | |
13 #error "This file requires ARC support." | |
14 #endif | |
15 | |
16 // Wrapper around a WebState stored in a WebStateList. May owns the WebState | |
marq (ping after 24h)
2017/02/13 16:32:53
s/owns/own/
sdefresne
2017/02/14 13:39:56
Done.
| |
17 // dependending on the WebStateList ownership setting (should always be true | |
18 // once ownership of Tab is sane, see http://crbug.com/546222 for progress). | |
19 class WebStateList::WebStateWrapper { | |
20 public: | |
21 WebStateWrapper(web::WebState* web_state, bool own_web_state); | |
rohitrao (ping after 24h)
2017/02/13 20:54:29
"bool assume_ownership" maybe? "Own" doesn't alwa
sdefresne
2017/02/14 13:39:56
Done.
| |
22 ~WebStateWrapper(); | |
23 | |
24 web::WebState* web_state() const { return web_state_; } | |
25 void set_web_state(web::WebState* web_state) { web_state_ = web_state; } | |
26 | |
27 private: | |
28 web::WebState* web_state_; | |
29 const bool own_web_state_; | |
30 | |
31 DISALLOW_COPY_AND_ASSIGN(WebStateWrapper); | |
32 }; | |
33 | |
34 WebStateList::WebStateWrapper::WebStateWrapper(web::WebState* web_state, | |
35 bool own_web_state) | |
36 : web_state_(web_state), own_web_state_(own_web_state) {} | |
37 | |
38 WebStateList::WebStateWrapper::~WebStateWrapper() { | |
39 if (own_web_state_) | |
40 delete web_state_; | |
41 } | |
42 | |
43 WebStateList::WebStateList(WebStateOwnership ownership) | |
44 : web_state_ownership_(ownership) {} | |
45 | |
46 WebStateList::~WebStateList() = default; | |
47 | |
48 bool WebStateList::ContainsIndex(size_t index) const { | |
49 return index < count(); | |
50 } | |
51 | |
52 web::WebState* WebStateList::GetWebStateAt(size_t index) const { | |
53 DCHECK(ContainsIndex(index)); | |
54 return web_state_wrappers_[index]->web_state(); | |
55 } | |
56 | |
57 size_t WebStateList::GetIndexOfWebState(const web::WebState* web_state) const { | |
58 for (size_t index = 0; index < web_state_wrappers_.size(); ++index) { | |
59 if (web_state_wrappers_[index]->web_state() == web_state) | |
60 return index; | |
61 } | |
62 return kInvalidIndex; | |
63 } | |
64 | |
65 void WebStateList::InsertWebState(size_t index, web::WebState* web_state) { | |
66 DCHECK(ContainsIndex(index) || index == count()); | |
67 web_state_wrappers_.insert( | |
68 web_state_wrappers_.begin() + index, | |
69 base::MakeUnique<WebStateWrapper>(web_state, | |
70 web_state_ownership_ == WebStateOwned)); | |
71 | |
72 for (auto& observer : observers_) | |
73 observer.WebStateInsertedAt(this, web_state, index); | |
74 } | |
75 | |
76 void WebStateList::MoveWebStateAt(size_t from_index, size_t to_index) { | |
77 DCHECK(ContainsIndex(from_index)); | |
78 DCHECK(ContainsIndex(to_index)); | |
79 if (from_index == to_index) | |
80 return; | |
81 | |
82 std::unique_ptr<WebStateWrapper> web_state_wrapper = | |
83 std::move(web_state_wrappers_[from_index]); | |
84 web::WebState* web_state = web_state_wrapper->web_state(); | |
85 web_state_wrappers_.erase(web_state_wrappers_.begin() + from_index); | |
86 web_state_wrappers_.insert(web_state_wrappers_.begin() + to_index, | |
87 std::move(web_state_wrapper)); | |
88 | |
89 for (auto& observer : observers_) | |
90 observer.WebStateMoved(this, web_state, from_index, to_index); | |
91 } | |
92 | |
93 web::WebState* WebStateList::ReplaceWebStateAt(size_t index, | |
94 web::WebState* web_state) { | |
95 DCHECK(ContainsIndex(index)); | |
96 web::WebState* old_web_state = web_state_wrappers_[index]->web_state(); | |
97 web_state_wrappers_[index]->set_web_state(web_state); | |
98 | |
99 for (auto& observer : observers_) | |
100 observer.WebStateReplacedAt(this, old_web_state, web_state, index); | |
101 | |
102 return old_web_state; | |
103 } | |
104 | |
105 void WebStateList::RemoveWebStateAt(size_t index) { | |
106 DCHECK(ContainsIndex(index)); | |
107 web::WebState* web_state = web_state_wrappers_[index]->web_state(); | |
108 web_state_wrappers_.erase(web_state_wrappers_.begin() + index); | |
109 | |
110 for (auto& observer : observers_) | |
111 observer.WebStateRemovedAt(this, web_state, index); | |
112 } | |
113 | |
114 void WebStateList::AddObserver(WebStateListObserver* observer) { | |
115 observers_.AddObserver(observer); | |
116 } | |
117 | |
118 void WebStateList::RemoveObserver(WebStateListObserver* observer) { | |
119 observers_.RemoveObserver(observer); | |
120 } | |
121 | |
122 // static | |
123 const size_t WebStateList::kInvalidIndex; | |
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