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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 "services/view_manager/server_view.h" | |
6 | |
7 #include <inttypes.h> | |
8 | |
9 #include "base/strings/stringprintf.h" | |
10 #include "services/view_manager/server_view_delegate.h" | |
11 #include "services/view_manager/server_view_observer.h" | |
12 | |
13 namespace view_manager { | |
14 | |
15 ServerView::ServerView(ServerViewDelegate* delegate, const ViewId& id) | |
16 : delegate_(delegate), | |
17 id_(id), | |
18 parent_(nullptr), | |
19 visible_(false), | |
20 opacity_(1), | |
21 // Don't notify newly added observers during notification. This causes | |
22 // problems for code that adds an observer as part of an observer | |
23 // notification (such as ServerViewDrawTracker). | |
24 observers_(base::ObserverList<ServerViewObserver>::NOTIFY_EXISTING_ONLY) { | |
25 DCHECK(delegate); // Must provide a delegate. | |
26 } | |
27 | |
28 ServerView::~ServerView() { | |
29 delegate_->PrepareToDestroyView(this); | |
30 FOR_EACH_OBSERVER(ServerViewObserver, observers_, OnWillDestroyView(this)); | |
31 | |
32 while (!children_.empty()) | |
33 children_.front()->parent()->Remove(children_.front()); | |
34 | |
35 if (parent_) | |
36 parent_->Remove(this); | |
37 | |
38 FOR_EACH_OBSERVER(ServerViewObserver, observers_, OnViewDestroyed(this)); | |
39 } | |
40 | |
41 void ServerView::AddObserver(ServerViewObserver* observer) { | |
42 observers_.AddObserver(observer); | |
43 } | |
44 | |
45 void ServerView::RemoveObserver(ServerViewObserver* observer) { | |
46 observers_.RemoveObserver(observer); | |
47 } | |
48 | |
49 void ServerView::Add(ServerView* child) { | |
50 // We assume validation checks happened already. | |
51 DCHECK(child); | |
52 DCHECK(child != this); | |
53 DCHECK(!child->Contains(this)); | |
54 if (child->parent() == this) { | |
55 if (children_.size() == 1) | |
56 return; // Already in the right position. | |
57 Reorder(child, children_.back(), mojo::OrderDirection::ABOVE); | |
58 return; | |
59 } | |
60 | |
61 ServerView* old_parent = child->parent(); | |
62 child->delegate_->PrepareToChangeViewHierarchy(child, this, old_parent); | |
63 FOR_EACH_OBSERVER(ServerViewObserver, child->observers_, | |
64 OnWillChangeViewHierarchy(child, this, old_parent)); | |
65 | |
66 if (child->parent()) | |
67 child->parent()->RemoveImpl(child); | |
68 | |
69 child->parent_ = this; | |
70 children_.push_back(child); | |
71 FOR_EACH_OBSERVER(ServerViewObserver, child->observers_, | |
72 OnViewHierarchyChanged(child, this, old_parent)); | |
73 } | |
74 | |
75 void ServerView::Remove(ServerView* child) { | |
76 // We assume validation checks happened else where. | |
77 DCHECK(child); | |
78 DCHECK(child != this); | |
79 DCHECK(child->parent() == this); | |
80 | |
81 child->delegate_->PrepareToChangeViewHierarchy(child, NULL, this); | |
82 FOR_EACH_OBSERVER(ServerViewObserver, child->observers_, | |
83 OnWillChangeViewHierarchy(child, nullptr, this)); | |
84 RemoveImpl(child); | |
85 FOR_EACH_OBSERVER(ServerViewObserver, child->observers_, | |
86 OnViewHierarchyChanged(child, nullptr, this)); | |
87 } | |
88 | |
89 void ServerView::Reorder(ServerView* child, | |
90 ServerView* relative, | |
91 mojo::OrderDirection direction) { | |
92 // We assume validation checks happened else where. | |
93 DCHECK(child); | |
94 DCHECK(child->parent() == this); | |
95 DCHECK_GT(children_.size(), 1u); | |
96 children_.erase(std::find(children_.begin(), children_.end(), child)); | |
97 Views::iterator i = std::find(children_.begin(), children_.end(), relative); | |
98 if (direction == mojo::OrderDirection::ABOVE) { | |
99 DCHECK(i != children_.end()); | |
100 children_.insert(++i, child); | |
101 } else if (direction == mojo::OrderDirection::BELOW) { | |
102 DCHECK(i != children_.end()); | |
103 children_.insert(i, child); | |
104 } | |
105 FOR_EACH_OBSERVER(ServerViewObserver, observers_, | |
106 OnViewReordered(this, relative, direction)); | |
107 } | |
108 | |
109 void ServerView::SetBounds(const gfx::Rect& bounds) { | |
110 if (bounds_ == bounds) | |
111 return; | |
112 | |
113 const gfx::Rect old_bounds = bounds_; | |
114 bounds_ = bounds; | |
115 FOR_EACH_OBSERVER(ServerViewObserver, observers_, | |
116 OnViewBoundsChanged(this, old_bounds, bounds)); | |
117 } | |
118 | |
119 const ServerView* ServerView::GetRoot() const { | |
120 const ServerView* view = this; | |
121 while (view && view->parent()) | |
122 view = view->parent(); | |
123 return view; | |
124 } | |
125 | |
126 std::vector<const ServerView*> ServerView::GetChildren() const { | |
127 std::vector<const ServerView*> children; | |
128 children.reserve(children_.size()); | |
129 for (size_t i = 0; i < children_.size(); ++i) | |
130 children.push_back(children_[i]); | |
131 return children; | |
132 } | |
133 | |
134 std::vector<ServerView*> ServerView::GetChildren() { | |
135 // TODO(sky): rename to children() and fix return type. | |
136 return children_; | |
137 } | |
138 | |
139 bool ServerView::Contains(const ServerView* view) const { | |
140 for (const ServerView* parent = view; parent; parent = parent->parent_) { | |
141 if (parent == this) | |
142 return true; | |
143 } | |
144 return false; | |
145 } | |
146 | |
147 void ServerView::SetVisible(bool value) { | |
148 if (visible_ == value) | |
149 return; | |
150 | |
151 delegate_->PrepareToChangeViewVisibility(this); | |
152 FOR_EACH_OBSERVER(ServerViewObserver, observers_, | |
153 OnWillChangeViewVisibility(this)); | |
154 visible_ = value; | |
155 FOR_EACH_OBSERVER(ServerViewObserver, observers_, | |
156 OnViewVisibilityChanged(this)); | |
157 } | |
158 | |
159 void ServerView::SetOpacity(float value) { | |
160 if (value == opacity_) | |
161 return; | |
162 opacity_ = value; | |
163 delegate_->OnScheduleViewPaint(this); | |
164 } | |
165 | |
166 void ServerView::SetTransform(const gfx::Transform& transform) { | |
167 if (transform_ == transform) | |
168 return; | |
169 | |
170 transform_ = transform; | |
171 delegate_->OnScheduleViewPaint(this); | |
172 } | |
173 | |
174 void ServerView::SetProperty(const std::string& name, | |
175 const std::vector<uint8_t>* value) { | |
176 auto it = properties_.find(name); | |
177 if (it != properties_.end()) { | |
178 if (value && it->second == *value) | |
179 return; | |
180 } else if (!value) { | |
181 // This property isn't set in |properties_| and |value| is NULL, so there's | |
182 // no change. | |
183 return; | |
184 } | |
185 | |
186 if (value) { | |
187 properties_[name] = *value; | |
188 } else if (it != properties_.end()) { | |
189 properties_.erase(it); | |
190 } | |
191 | |
192 FOR_EACH_OBSERVER(ServerViewObserver, observers_, | |
193 OnViewSharedPropertyChanged(this, name, value)); | |
194 } | |
195 | |
196 bool ServerView::IsDrawn(const ServerView* root) const { | |
197 if (!root->visible_) | |
198 return false; | |
199 const ServerView* view = this; | |
200 while (view && view != root && view->visible_) | |
201 view = view->parent_; | |
202 return view == root; | |
203 } | |
204 | |
205 void ServerView::SetSurfaceId(cc::SurfaceId surface_id) { | |
206 surface_id_ = surface_id; | |
207 delegate_->OnScheduleViewPaint(this); | |
208 } | |
209 | |
210 #if !defined(NDEBUG) | |
211 std::string ServerView::GetDebugWindowHierarchy() const { | |
212 std::string result; | |
213 BuildDebugInfo(std::string(), &result); | |
214 return result; | |
215 } | |
216 | |
217 void ServerView::BuildDebugInfo(const std::string& depth, | |
218 std::string* result) const { | |
219 *result += base::StringPrintf( | |
220 "%sid=%d,%d visible=%s bounds=%d,%d %dx%d surface_id=%" PRIu64 "\n", | |
221 depth.c_str(), static_cast<int>(id_.connection_id), | |
222 static_cast<int>(id_.view_id), visible_ ? "true" : "false", bounds_.x(), | |
223 bounds_.y(), bounds_.width(), bounds_.height(), surface_id_.id); | |
224 for (const ServerView* child : children_) | |
225 child->BuildDebugInfo(depth + " ", result); | |
226 } | |
227 #endif | |
228 | |
229 void ServerView::RemoveImpl(ServerView* view) { | |
230 view->parent_ = NULL; | |
231 children_.erase(std::find(children_.begin(), children_.end(), view)); | |
232 } | |
233 | |
234 } // namespace view_manager | |
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