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https://github.com/status-im/react-native.git
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7197aa026b
Summary: That's generally better because: * Avoids exposing ShadowNode to mounting layer; * Enables hashing and comparing the AttributedString based on actual meaningful data (not on just a pointer to ShadowNode). Reviewed By: mdvacca Differential Revision: D13205230 fbshipit-source-id: 7b79c1aad97b10d81e3faa10408be61b74f815cf
116 lines
3.1 KiB
C++
116 lines
3.1 KiB
C++
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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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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*/
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#pragma once
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#include <functional>
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#include <memory>
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#include <folly/Optional.h>
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#include <react/attributedstring/TextAttributes.h>
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#include <react/core/Sealable.h>
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#include <react/core/ShadowNode.h>
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#include <react/debug/DebugStringConvertible.h>
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#include <react/mounting/ShadowView.h>
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namespace facebook {
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namespace react {
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class AttributedString;
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using SharedAttributedString = std::shared_ptr<const AttributedString>;
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/*
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* Simple, cross-platfrom, React-specific implementation of attributed string
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* (aka spanned string).
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* `AttributedString` is basically a list of `Fragments` which have `string` and
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* `textAttributes` + `shadowNode` associated with the `string`.
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*/
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class AttributedString : public Sealable, public DebugStringConvertible {
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public:
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class Fragment {
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public:
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std::string string;
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TextAttributes textAttributes;
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ShadowView shadowView;
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ShadowView parentShadowView;
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bool operator==(const Fragment &rhs) const;
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bool operator!=(const Fragment &rhs) const;
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};
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using Fragments = std::vector<Fragment>;
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/*
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* Appends and prepends a `fragment` to the string.
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*/
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void appendFragment(const Fragment &fragment);
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void prependFragment(const Fragment &fragment);
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/*
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* Appends and prepends an `attributedString` (all its fragments) to
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* the string.
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*/
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void appendAttributedString(const AttributedString &attributedString);
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void prependAttributedString(const AttributedString &attributedString);
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/*
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* Returns read-only reference to a list of fragments.
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*/
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const Fragments &getFragments() const;
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/*
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* Returns a string constructed from all strings in all fragments.
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*/
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std::string getString() const;
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bool operator==(const AttributedString &rhs) const;
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bool operator!=(const AttributedString &rhs) const;
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#pragma mark - DebugStringConvertible
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#if RN_DEBUG_STRING_CONVERTIBLE
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SharedDebugStringConvertibleList getDebugChildren() const override;
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#endif
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private:
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Fragments fragments_;
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};
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} // namespace react
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} // namespace facebook
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namespace std {
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template <>
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struct hash<facebook::react::AttributedString::Fragment> {
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size_t operator()(
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const facebook::react::AttributedString::Fragment &fragment) const {
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return std::hash<decltype(fragment.string)>{}(fragment.string) +
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std::hash<decltype(fragment.textAttributes)>{}(
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fragment.textAttributes) +
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std::hash<decltype(fragment.shadowView)>{}(fragment.shadowView) +
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std::hash<decltype(fragment.parentShadowView)>{}(
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fragment.parentShadowView);
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}
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};
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template <>
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struct hash<facebook::react::AttributedString> {
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size_t operator()(
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const facebook::react::AttributedString &attributedString) const {
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auto result = size_t{0};
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for (const auto &fragment : attributedString.getFragments()) {
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result +=
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std::hash<facebook::react::AttributedString::Fragment>{}(fragment);
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}
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return result;
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}
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};
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} // namespace std
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