149 lines
3.8 KiB
C++
149 lines
3.8 KiB
C++
/*
|
|
* Copyright (c) Meta Platforms, Inc. and 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 <memory>
|
|
|
|
#include <react/renderer/attributedstring/TextAttributes.h>
|
|
#include <react/renderer/core/Sealable.h>
|
|
#include <react/renderer/core/ShadowNode.h>
|
|
#include <react/renderer/debug/DebugStringConvertible.h>
|
|
#include <react/renderer/mounting/ShadowView.h>
|
|
#include <react/utils/hash_combine.h>
|
|
|
|
namespace facebook::react {
|
|
|
|
class AttributedString;
|
|
|
|
using SharedAttributedString = std::shared_ptr<const AttributedString>;
|
|
|
|
/*
|
|
* Simple, cross-platform, 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;
|
|
|
|
/*
|
|
* Returns whether the underlying text and attributes are equal,
|
|
* disregarding layout or other information.
|
|
*/
|
|
bool isContentEqual(const Fragment& rhs) const;
|
|
|
|
bool operator==(const Fragment& rhs) const;
|
|
bool operator!=(const Fragment& rhs) const;
|
|
};
|
|
|
|
class Range {
|
|
public:
|
|
int location{0};
|
|
int length{0};
|
|
};
|
|
|
|
using Fragments = std::vector<Fragment>;
|
|
|
|
/*
|
|
* Appends and prepends a `fragment` to the string.
|
|
*/
|
|
void appendFragment(Fragment&& fragment);
|
|
void prependFragment(Fragment&& fragment);
|
|
|
|
/*
|
|
* Sets attributes which would apply to hypothetical text not included in the
|
|
* AttributedString.
|
|
*/
|
|
void setBaseTextAttributes(const TextAttributes& defaultAttributes);
|
|
|
|
/*
|
|
* Returns a read-only reference to a list of fragments.
|
|
*/
|
|
const Fragments& getFragments() const;
|
|
|
|
/*
|
|
* Returns a reference to a list of fragments.
|
|
*/
|
|
Fragments& getFragments();
|
|
|
|
/*
|
|
* Returns a string constructed from all strings in all fragments.
|
|
*/
|
|
std::string getString() const;
|
|
|
|
const TextAttributes& getBaseTextAttributes() const;
|
|
|
|
/*
|
|
* Returns `true` if the string is empty (has no any fragments).
|
|
*/
|
|
bool isEmpty() const;
|
|
|
|
/**
|
|
* Compares equality of TextAttributes of all Fragments on both sides.
|
|
*/
|
|
bool compareTextAttributesWithoutFrame(const AttributedString& rhs) const;
|
|
|
|
bool isContentEqual(const AttributedString& rhs) 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_;
|
|
TextAttributes baseAttributes_;
|
|
};
|
|
|
|
} // namespace facebook::react
|
|
|
|
namespace std {
|
|
template <>
|
|
struct hash<facebook::react::AttributedString::Fragment> {
|
|
size_t operator()(
|
|
const facebook::react::AttributedString::Fragment& fragment) const {
|
|
return facebook::react::hash_combine(
|
|
fragment.string,
|
|
fragment.textAttributes,
|
|
fragment.parentShadowView,
|
|
fragment.parentShadowView.layoutMetrics);
|
|
}
|
|
};
|
|
|
|
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()) {
|
|
facebook::react::hash_combine(seed, fragment);
|
|
}
|
|
|
|
return seed;
|
|
}
|
|
};
|
|
} // namespace std
|