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8f51243957
Summary: This is the second and the final part of adopting clang-format. Reviewed By: mdvacca Differential Revision: D10229624 fbshipit-source-id: d97670b716800ea2488b84bd0aacaf54d8bd2e31
121 lines
3.5 KiB
C++
121 lines
3.5 KiB
C++
// Copyright (c) Facebook, Inc. and its affiliates.
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// This source code is licensed under the MIT license found in the
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// LICENSE file in the root directory of this source tree.
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#pragma once
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#include <memory>
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#include <mutex>
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#include <fabric/components/root/RootShadowNode.h>
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#include <fabric/core/LayoutConstraints.h>
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#include <fabric/core/ReactPrimitives.h>
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#include <fabric/core/ShadowNode.h>
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#include <fabric/uimanager/ShadowTreeDelegate.h>
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#include <fabric/uimanager/ShadowViewMutation.h>
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namespace facebook {
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namespace react {
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/*
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* Represents the shadow tree and its lifecycle.
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*/
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class ShadowTree final {
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public:
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/*
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* Creates a new shadow tree instance.
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*/
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ShadowTree(
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SurfaceId surfaceId,
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const LayoutConstraints &layoutConstraints,
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const LayoutContext &layoutContext);
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~ShadowTree();
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/*
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* Returns the `SurfaceId` associated with the shadow tree.
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*/
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SurfaceId getSurfaceId() const;
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/*
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* Synchronously runs `function` when `commitMutex_` is acquired.
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* It is useful in cases when transactional consistency and/or successful
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* commit are required. E.g. you might want to run `measure` and
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* `constraintLayout` as part of a single congious transaction.
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* Use this only if it is necessary. All public methods of the class are
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* already thread-safe.
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*/
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void synchronize(std::function<void(void)> function) const;
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#pragma mark - Layout
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/*
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* Measures the shadow tree with given `layoutConstraints` and
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* `layoutContext`. Can be called from any thread, side-effect-less.
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*/
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Size measure(
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const LayoutConstraints &layoutConstraints,
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const LayoutContext &layoutContext) const;
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/*
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* Applies given `layoutConstraints` and `layoutContext` and commit
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* the new shadow tree.
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* Returns `true` if the operation finished successfully.
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* Can be called from any thread.
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*/
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bool constraintLayout(
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const LayoutConstraints &layoutConstraints,
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const LayoutContext &layoutContext) const;
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#pragma mark - Application
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/*
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* Create a new shadow tree with given `rootChildNodes` and commit.
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* Can be called from any thread.
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* Returns `true` if the operation finished successfully.
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*/
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bool complete(const SharedShadowNodeUnsharedList &rootChildNodes) const;
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#pragma mark - Delegate
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/*
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* Sets and gets the delegate.
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* The delegate is stored as a raw pointer, so the owner must null
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* the pointer before being destroyed.
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*/
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void setDelegate(ShadowTreeDelegate const *delegate);
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ShadowTreeDelegate const *getDelegate() const;
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private:
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UnsharedRootShadowNode cloneRootShadowNode(
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const SharedRootShadowNode &oldRootShadowNode,
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const LayoutConstraints &layoutConstraints,
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const LayoutContext &layoutContext) const;
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bool complete(
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const SharedRootShadowNode &oldRootShadowNode,
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const UnsharedRootShadowNode &newRootShadowNode) const;
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bool commit(
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const SharedRootShadowNode &oldRootShadowNode,
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const SharedRootShadowNode &newRootShadowNode,
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const ShadowViewMutationList &mutations) const;
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void toggleEventEmitters(const ShadowViewMutationList &mutations) const;
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void emitLayoutEvents(const ShadowViewMutationList &mutations) const;
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/*
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* Return `rootShadowNodeMutex_` protected by `commitMutex_`.
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*/
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SharedRootShadowNode getRootShadowNode() const;
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const SurfaceId surfaceId_;
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mutable SharedRootShadowNode rootShadowNode_; // Protected by `commitMutex_`.
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ShadowTreeDelegate const *delegate_;
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mutable std::recursive_mutex commitMutex_;
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};
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} // namespace react
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} // namespace facebook
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