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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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