mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Samuel Susla
b40f0562f5
Summary: In order to build dynamic text sizing, `LayoutableShadowNode::measure` needs to accept `LayoutContext` Changelog: [Internal] Reviewed By: shergin Differential Revision: D20184598 fbshipit-source-id: 8928b59d51948caf3654f40049212a89a91dceb6
96 lines
3.1 KiB
C++
96 lines
3.1 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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#include "TextInputShadowNode.h"
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#include <react/attributedstring/AttributedStringBox.h>
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#include <react/attributedstring/TextAttributes.h>
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#include <react/core/LayoutConstraints.h>
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#include <react/core/LayoutContext.h>
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#include <react/core/conversions.h>
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namespace facebook {
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namespace react {
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extern char const TextInputComponentName[] = "TextInput";
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AttributedStringBox TextInputShadowNode::attributedStringBoxToMeasure() const {
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bool hasMeaningfulState =
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getState() && getState()->getRevision() != State::initialRevisionValue;
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if (hasMeaningfulState) {
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auto attributedStringBox = getStateData().attributedStringBox;
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if (attributedStringBox.getMode() ==
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AttributedStringBox::Mode::OpaquePointer ||
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!attributedStringBox.getValue().isEmpty()) {
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return getStateData().attributedStringBox;
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}
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}
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auto attributedString =
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hasMeaningfulState ? AttributedString{} : getAttributedString();
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if (attributedString.isEmpty()) {
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auto placeholder = getConcreteProps().placeholder;
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// Note: `zero-width space` is insufficient in some cases (e.g. when we need
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// to measure the "hight" of the font).
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auto string = !placeholder.empty() ? placeholder : "I";
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auto textAttributes = getConcreteProps().getEffectiveTextAttributes();
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attributedString.appendFragment({string, textAttributes, {}});
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}
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return AttributedStringBox{attributedString};
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}
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AttributedString TextInputShadowNode::getAttributedString() const {
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auto textAttributes = getConcreteProps().getEffectiveTextAttributes();
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auto attributedString = AttributedString{};
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attributedString.appendFragment(
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AttributedString::Fragment{getConcreteProps().text, textAttributes});
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attributedString.appendAttributedString(
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BaseTextShadowNode::getAttributedString(textAttributes, *this));
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return attributedString;
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}
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void TextInputShadowNode::setTextLayoutManager(
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TextLayoutManager::Shared const &textLayoutManager) {
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ensureUnsealed();
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textLayoutManager_ = textLayoutManager;
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}
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void TextInputShadowNode::updateStateIfNeeded() {
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ensureUnsealed();
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if (!getState() || getState()->getRevision() == State::initialRevisionValue) {
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auto state = TextInputState{};
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state.attributedStringBox = AttributedStringBox{getAttributedString()};
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state.paragraphAttributes = getConcreteProps().paragraphAttributes;
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state.layoutManager = textLayoutManager_;
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setStateData(std::move(state));
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}
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}
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#pragma mark - LayoutableShadowNode
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Size TextInputShadowNode::measureContent(LayoutConstraints layoutConstraints, LayoutContext layoutContext) const {
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return textLayoutManager_->measure(
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attributedStringBoxToMeasure(),
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getConcreteProps().getEffectiveParagraphAttributes(),
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layoutConstraints);
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}
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void TextInputShadowNode::layout(LayoutContext layoutContext) {
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updateStateIfNeeded();
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ConcreteViewShadowNode::layout(layoutContext);
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}
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} // namespace react
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} // namespace facebook
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