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mojo/services/view_manager/server_view.cc

+// Copyright 2014 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 "mojo/services/view_manager/server_view.h"
+
+#include <inttypes.h>
+
+#include "base/strings/stringprintf.h"
+#include "mojo/services/view_manager/server_view_delegate.h"
+
+namespace view_manager {
+
+ServerView::ServerView(ServerViewDelegate* delegate, const ViewId& id)
+    : delegate_(delegate),
+      id_(id),
+      parent_(nullptr),
+      visible_(false),
+      opacity_(1) {
+  DCHECK(delegate);  // Must provide a delegate.
+}
+
+ServerView::~ServerView() {
+  delegate_->OnWillDestroyView(this);
+
+  while (!children_.empty())
+    children_.front()->parent()->Remove(children_.front());
+
+  if (parent_)
+    parent_->Remove(this);
+
+  delegate_->OnViewDestroyed(this);
+}
+
+void ServerView::Add(ServerView* child) {
+  // We assume validation checks happened already.
+  DCHECK(child);
+  DCHECK(child != this);
+  DCHECK(!child->Contains(this));
+  if (child->parent() == this) {
+    if (children_.size() == 1)
+      return;  // Already in the right position.
+    Reorder(child, children_.back(), mojo::ORDER_DIRECTION_ABOVE);
+    return;
+  }
+
+  ServerView* old_parent = child->parent();
+  child->delegate_->OnWillChangeViewHierarchy(child, this, old_parent);
+  if (child->parent())
+    child->parent()->RemoveImpl(child);
+
+  child->parent_ = this;
+  children_.push_back(child);
+  child->delegate_->OnViewHierarchyChanged(child, this, old_parent);
+}
+
+void ServerView::Remove(ServerView* child) {
+  // We assume validation checks happened else where.
+  DCHECK(child);
+  DCHECK(child != this);
+  DCHECK(child->parent() == this);
+
+  child->delegate_->OnWillChangeViewHierarchy(child, NULL, this);
+  RemoveImpl(child);
+  child->delegate_->OnViewHierarchyChanged(child, NULL, this);
+}
+
+void ServerView::Reorder(ServerView* child,
+                         ServerView* relative,
+                         mojo::OrderDirection direction) {
+  // We assume validation checks happened else where.
+  DCHECK(child);
+  DCHECK(child->parent() == this);
+  DCHECK_GT(children_.size(), 1u);
+  children_.erase(std::find(children_.begin(), children_.end(), child));
+  Views::iterator i = std::find(children_.begin(), children_.end(), relative);
+  if (direction == mojo::ORDER_DIRECTION_ABOVE) {
+    DCHECK(i != children_.end());
+    children_.insert(++i, child);
+  } else if (direction == mojo::ORDER_DIRECTION_BELOW) {
+    DCHECK(i != children_.end());
+    children_.insert(i, child);
+  }
+  delegate_->OnViewReordered(this, relative, direction);
+}
+
+void ServerView::SetBounds(const gfx::Rect& bounds) {
+  if (bounds_ == bounds)
+    return;
+
+  const gfx::Rect old_bounds = bounds_;
+  bounds_ = bounds;
+  delegate_->OnViewBoundsChanged(this, old_bounds, bounds);
+}
+
+const ServerView* ServerView::GetRoot() const {
+  const ServerView* view = this;
+  while (view && view->parent())
+    view = view->parent();
+  return view;
+}
+
+std::vector<const ServerView*> ServerView::GetChildren() const {
+  std::vector<const ServerView*> children;
+  children.reserve(children_.size());
+  for (size_t i = 0; i < children_.size(); ++i)
+    children.push_back(children_[i]);
+  return children;
+}
+
+std::vector<ServerView*> ServerView::GetChildren() {
+  // TODO(sky): rename to children() and fix return type.
+  return children_;
+}
+
+bool ServerView::Contains(const ServerView* view) const {
+  for (const ServerView* parent = view; parent; parent = parent->parent_) {
+    if (parent == this)
+      return true;
+  }
+  return false;
+}
+
+void ServerView::SetVisible(bool value) {
+  if (visible_ == value)
+    return;
+
+  delegate_->OnWillChangeViewVisibility(this);
+  visible_ = value;
+}
+
+void ServerView::SetOpacity(float value) {
+  if (value == opacity_)
+    return;
+  opacity_ = value;
+  delegate_->OnScheduleViewPaint(this);
+}
+
+void ServerView::SetTransform(const gfx::Transform& transform) {
+  if (transform_ == transform)
+    return;
+
+  transform_ = transform;
+  delegate_->OnScheduleViewPaint(this);
+}
+
+void ServerView::SetProperty(const std::string& name,
+                             const std::vector<uint8_t>* value) {
+  auto it = properties_.find(name);
+  if (it != properties_.end()) {
+    if (value && it->second == *value)
+      return;
+  } else if (!value) {
+    // This property isn't set in |properties_| and |value| is NULL, so there's
+    // no change.
+    return;
+  }
+
+  if (value) {
+    properties_[name] = *value;
+  } else if (it != properties_.end()) {
+    properties_.erase(it);
+  }
+
+  delegate_->OnViewSharedPropertyChanged(this, name, value);
+}
+
+bool ServerView::IsDrawn(const ServerView* root) const {
+  if (!root->visible_)
+    return false;
+  const ServerView* view = this;
+  while (view && view != root && view->visible_)
+    view = view->parent_;
+  return view == root;
+}
+
+void ServerView::SetSurfaceId(cc::SurfaceId surface_id) {
+  surface_id_ = surface_id;
+  delegate_->OnViewSurfaceIdChanged(this);
+}
+
+#if !defined(NDEBUG)
+std::string ServerView::GetDebugWindowHierarchy() const {
+  std::string result;
+  BuildDebugInfo(std::string(), &result);
+  return result;
+}
+
+void ServerView::BuildDebugInfo(const std::string& depth,
+                                std::string* result) const {
+  *result += base::StringPrintf(
+      "%sid=%d,%d visible=%s bounds=%d,%d %dx%d surface_id=%" PRIu64 "\n",
+      depth.c_str(), static_cast<int>(id_.connection_id),
+      static_cast<int>(id_.view_id), visible_ ? "true" : "false", bounds_.x(),
+      bounds_.y(), bounds_.width(), bounds_.height(), surface_id_.id);
+  for (const ServerView* child : children_)
+    child->BuildDebugInfo(depth + "  ", result);
+}
+#endif
+
+void ServerView::RemoveImpl(ServerView* view) {
+  view->parent_ = NULL;
+  children_.erase(std::find(children_.begin(), children_.end(), view));
+}
+
+}  // namespace view_manager