mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Samuel Susla
36b586ada1
Summary: Changelog: [Internal] Add support for dynamic font size. New class `ThreadStorage` is introduced, which is used to pass LayoutContext to `YogaLayoutableShadowNode::yogaNodeMeasureCallbackConnector`. ## Shortcoming This implementation doesn't cause re-render, if user changes font size and comes to the app without restarting it, it will show old font size. I believe this is fine for now as most people set their font size before they use the app and keep the same setting for a long time. Reviewed By: shergin Differential Revision: D22043728 fbshipit-source-id: 7453d165c280a2f4bcb73f4ee6daf9e64b637ded
82 lines
2.6 KiB
C++
82 lines
2.6 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 <react/attributedstring/AttributedString.h>
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#include <react/components/iostextinput/TextInputEventEmitter.h>
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#include <react/components/iostextinput/TextInputProps.h>
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#include <react/components/iostextinput/TextInputState.h>
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#include <react/components/text/BaseTextShadowNode.h>
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#include <react/components/view/ConcreteViewShadowNode.h>
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#include <react/textlayoutmanager/TextLayoutManager.h>
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#include <react/utils/ContextContainer.h>
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namespace facebook {
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namespace react {
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extern const char TextInputComponentName[];
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/*
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* `ShadowNode` for <TextInput> component.
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*/
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class TextInputShadowNode : public ConcreteViewShadowNode<
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TextInputComponentName,
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TextInputProps,
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TextInputEventEmitter,
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TextInputState>,
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public BaseTextShadowNode {
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public:
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using ConcreteViewShadowNode::ConcreteViewShadowNode;
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static ShadowNodeTraits BaseTraits() {
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auto traits = ConcreteViewShadowNode::BaseTraits();
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traits.set(ShadowNodeTraits::Trait::TextKind);
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traits.set(ShadowNodeTraits::Trait::LeafYogaNode);
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return traits;
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}
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/*
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* Associates a shared `TextLayoutManager` with the node.
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* `TextInputShadowNode` uses the manager to measure text content
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* and construct `TextInputState` objects.
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*/
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void setTextLayoutManager(TextLayoutManager::Shared const &textLayoutManager);
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#pragma mark - LayoutableShadowNode
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Size measureContent(
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LayoutContext const &layoutContext,
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LayoutConstraints const &layoutConstraints) const override;
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void layout(LayoutContext layoutContext) override;
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private:
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/*
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* Creates a `State` object if needed.
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*/
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void updateStateIfNeeded(LayoutContext const &layoutContext);
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/*
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* Returns a `AttributedString` which represents text content of the node.
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*/
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AttributedString getAttributedString(
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LayoutContext const &layoutContext) const;
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/*
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* Returns an `AttributedStringBox` which represents text content that should
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* be used for measuring purposes. It might contain actual text value,
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* placeholder value or some character that represents the size of the font.
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*/
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AttributedStringBox attributedStringBoxToMeasure(
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LayoutContext const &layoutContext) const;
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TextLayoutManager::Shared textLayoutManager_;
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};
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} // namespace react
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} // namespace facebook
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