106 lines
2.8 KiB
C++
106 lines
2.8 KiB
C++
/*
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* Copyright (c) Meta Platforms, Inc. and 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 <limits>
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#include <folly/Hash.h>
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#include <react/renderer/attributedstring/primitives.h>
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#include <react/renderer/debug/DebugStringConvertible.h>
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#include <react/renderer/graphics/Float.h>
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namespace facebook {
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namespace react {
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class ParagraphAttributes;
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using SharedParagraphAttributes = std::shared_ptr<const ParagraphAttributes>;
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/*
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* Represents all visual attributes of a paragraph of text.
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* Two data structures, ParagraphAttributes and AttributedText, should be
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* enough to define visual representation of a piece of text on the screen.
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*/
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class ParagraphAttributes : public DebugStringConvertible {
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public:
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#pragma mark - Fields
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/*
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* Maximum number of lines which paragraph can take.
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* Zero value represents "no limit".
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*/
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int maximumNumberOfLines{};
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/*
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* In case if a text cannot fit given boundaries, defines a place where
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* an ellipsize should be placed.
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*/
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EllipsizeMode ellipsizeMode{};
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/*
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* (Android only) Break strategy for breaking paragraphs into lines.
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*/
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TextBreakStrategy textBreakStrategy{TextBreakStrategy::HighQuality};
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/*
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* Enables font size adjustment to fit constrained boundaries.
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*/
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bool adjustsFontSizeToFit{};
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/*
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* (Android only) Leaves enough room for ascenders and descenders instead of
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* using the font ascent and descent strictly.
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*/
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bool includeFontPadding{true};
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/*
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* (Android only) Frequency of automatic hyphenation to use when determining
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* word breaks.
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*/
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HyphenationFrequency android_hyphenationFrequency{};
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/*
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* In case of font size adjustment enabled, defines minimum and maximum
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* font sizes.
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*/
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Float minimumFontSize{std::numeric_limits<Float>::quiet_NaN()};
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Float maximumFontSize{std::numeric_limits<Float>::quiet_NaN()};
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bool operator==(const ParagraphAttributes &) const;
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bool operator!=(const ParagraphAttributes &) const;
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#pragma mark - DebugStringConvertible
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#if RN_DEBUG_STRING_CONVERTIBLE
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SharedDebugStringConvertibleList getDebugProps() const override;
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#endif
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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::ParagraphAttributes> {
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size_t operator()(
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const facebook::react::ParagraphAttributes &attributes) const {
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return folly::hash::hash_combine(
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0,
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attributes.maximumNumberOfLines,
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attributes.ellipsizeMode,
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attributes.textBreakStrategy,
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attributes.adjustsFontSizeToFit,
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attributes.minimumFontSize,
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attributes.maximumFontSize,
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attributes.includeFontPadding,
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attributes.android_hyphenationFrequency);
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}
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};
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} // namespace std
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