mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Valentin Shergin
7368f79169
Summary: We need this type to work with string ranges (e.g. working with selection ranges). This diff implements parsing and printing that as well. Changelog: [Internal] Fabric-specific internal change. Reviewed By: sammy-SC Differential Revision: D18607656 fbshipit-source-id: f2cfd7c5b7ba9f225a9a0c5a078947a220b2f30d
133 lines
3.2 KiB
C++
133 lines
3.2 KiB
C++
/*
|
|
* Copyright (c) Facebook, Inc. and its affiliates.
|
|
*
|
|
* This source code is licensed under the MIT license found in the
|
|
* LICENSE file in the root directory of this source tree.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <functional>
|
|
#include <memory>
|
|
|
|
#include <folly/Hash.h>
|
|
#include <folly/Optional.h>
|
|
#include <react/attributedstring/TextAttributes.h>
|
|
#include <react/core/Sealable.h>
|
|
#include <react/core/ShadowNode.h>
|
|
#include <react/debug/DebugStringConvertible.h>
|
|
#include <react/mounting/ShadowView.h>
|
|
|
|
namespace facebook {
|
|
namespace react {
|
|
|
|
class AttributedString;
|
|
|
|
using SharedAttributedString = std::shared_ptr<const AttributedString>;
|
|
|
|
/*
|
|
* Simple, cross-platfrom, React-specific implementation of attributed string
|
|
* (aka spanned string).
|
|
* `AttributedString` is basically a list of `Fragments` which have `string` and
|
|
* `textAttributes` + `shadowNode` associated with the `string`.
|
|
*/
|
|
class AttributedString : public Sealable, public DebugStringConvertible {
|
|
public:
|
|
class Fragment {
|
|
public:
|
|
static std::string AttachmentCharacter();
|
|
|
|
std::string string;
|
|
TextAttributes textAttributes;
|
|
ShadowView parentShadowView;
|
|
|
|
/*
|
|
* Returns true is the Fragment represents an attachment.
|
|
* Equivalent to `string == AttachmentCharacter()`.
|
|
*/
|
|
bool isAttachment() const;
|
|
|
|
bool operator==(const Fragment &rhs) const;
|
|
bool operator!=(const Fragment &rhs) const;
|
|
};
|
|
|
|
class Range {
|
|
public:
|
|
int location{0};
|
|
int length{0};
|
|
};
|
|
|
|
using Fragments = better::small_vector<Fragment, 1>;
|
|
|
|
/*
|
|
* Appends and prepends a `fragment` to the string.
|
|
*/
|
|
void appendFragment(const Fragment &fragment);
|
|
void prependFragment(const Fragment &fragment);
|
|
|
|
/*
|
|
* Appends and prepends an `attributedString` (all its fragments) to
|
|
* the string.
|
|
*/
|
|
void appendAttributedString(const AttributedString &attributedString);
|
|
void prependAttributedString(const AttributedString &attributedString);
|
|
|
|
/*
|
|
* Returns read-only reference to a list of fragments.
|
|
*/
|
|
const Fragments &getFragments() const;
|
|
|
|
/*
|
|
* Returns a string constructed from all strings in all fragments.
|
|
*/
|
|
std::string getString() const;
|
|
|
|
/*
|
|
* Returns `true` if the string is empty (has no any fragments).
|
|
*/
|
|
bool isEmpty() const;
|
|
|
|
bool operator==(const AttributedString &rhs) const;
|
|
bool operator!=(const AttributedString &rhs) const;
|
|
|
|
#pragma mark - DebugStringConvertible
|
|
|
|
#if RN_DEBUG_STRING_CONVERTIBLE
|
|
SharedDebugStringConvertibleList getDebugChildren() const override;
|
|
#endif
|
|
|
|
private:
|
|
Fragments fragments_;
|
|
};
|
|
|
|
} // namespace react
|
|
} // namespace facebook
|
|
|
|
namespace std {
|
|
template <>
|
|
struct hash<facebook::react::AttributedString::Fragment> {
|
|
size_t operator()(
|
|
const facebook::react::AttributedString::Fragment &fragment) const {
|
|
return folly::hash::hash_combine(
|
|
0,
|
|
fragment.string,
|
|
fragment.textAttributes,
|
|
fragment.parentShadowView);
|
|
}
|
|
};
|
|
|
|
template <>
|
|
struct hash<facebook::react::AttributedString> {
|
|
size_t operator()(
|
|
const facebook::react::AttributedString &attributedString) const {
|
|
auto seed = size_t{0};
|
|
|
|
for (const auto &fragment : attributedString.getFragments()) {
|
|
seed = folly::hash::hash_combine(seed, fragment);
|
|
}
|
|
|
|
return seed;
|
|
}
|
|
};
|
|
} // namespace std
|