72 lines
2.1 KiB
C++
72 lines
2.1 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 <react/renderer/attributedstring/AttributedStringBox.h>
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#include <react/renderer/attributedstring/ParagraphAttributes.h>
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#include <react/renderer/core/LayoutConstraints.h>
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#include <react/renderer/textlayoutmanager/TextLayoutContext.h>
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#include <react/renderer/textlayoutmanager/TextMeasureCache.h>
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#include <react/utils/ContextContainer.h>
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#include <memory>
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namespace facebook::react {
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/*
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* Cross platform facade for text measurement (e.g. Android-specific
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* TextLayoutManager)
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*/
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class TextLayoutManager {
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public:
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TextLayoutManager(const ContextContainer::Shared& contextContainer);
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/*
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* Not copyable.
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*/
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TextLayoutManager(const TextLayoutManager&) = delete;
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TextLayoutManager& operator=(const TextLayoutManager&) = delete;
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/*
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* Not movable.
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*/
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TextLayoutManager(TextLayoutManager&&) = delete;
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TextLayoutManager& operator=(TextLayoutManager&&) = delete;
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/*
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* Measures `attributedString` using native text rendering infrastructure.
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*/
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TextMeasurement measure(
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const AttributedStringBox& attributedStringBox,
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const ParagraphAttributes& paragraphAttributes,
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const TextLayoutContext& layoutContext,
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const LayoutConstraints& layoutConstraints) const;
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/*
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* Measures lines of `attributedString` using native text rendering
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* infrastructure.
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*/
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LinesMeasurements measureLines(
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const AttributedStringBox& attributedStringBox,
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const ParagraphAttributes& paragraphAttributes,
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const Size& size) const;
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/*
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* Returns an opaque pointer to platform-specific TextLayoutManager.
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* Is used on a native views layer to delegate text rendering to the manager.
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*/
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std::shared_ptr<void> getNativeTextLayoutManager() const;
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protected:
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std::shared_ptr<const ContextContainer> contextContainer_;
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std::shared_ptr<void> nativeTextLayoutManager_;
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TextMeasureCache textMeasureCache_;
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LineMeasureCache lineMeasureCache_;
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};
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} // namespace facebook::react
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