mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Samuel Susla
412fc7d324
Summary: Changelog: [internal] In D23648430 (https://github.com/facebook/react-native/commit/a315e4cd30e4b8da841f587650146a62c868f67d) I made a mistake. I prevented calling `onTextLayout` unless there are attachments in the component. It fixed the problem because I unintentionally prevented `onTextLayout` to be called. Therefore, changes from D23648430 (https://github.com/facebook/react-native/commit/a315e4cd30e4b8da841f587650146a62c868f67d) need to be reverted. To prevent infinite loop in `onTextLayout`, ParagraphEventEmitter checks if `linesMeasurements` have changed before dispatching it to JS. Reviewed By: shergin Differential Revision: D23782717 fbshipit-source-id: 0e84ae4f46d79ce0cf4c7340cd32be6f562ae179
56 lines
1.9 KiB
C++
56 lines
1.9 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 "ParagraphEventEmitter.h"
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namespace facebook {
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namespace react {
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static jsi::Value linesMeasurementsPayload(
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jsi::Runtime &runtime,
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LinesMeasurements const &linesMeasurements) {
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auto payload = jsi::Object(runtime);
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auto lines = jsi::Array(runtime, linesMeasurements.size());
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for (size_t i = 0; i < linesMeasurements.size(); ++i) {
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auto const &lineMeasurement = linesMeasurements[i];
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auto jsiLine = jsi::Object(runtime);
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jsiLine.setProperty(runtime, "text", lineMeasurement.text);
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jsiLine.setProperty(runtime, "x", lineMeasurement.frame.origin.x);
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jsiLine.setProperty(runtime, "y", lineMeasurement.frame.origin.y);
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jsiLine.setProperty(runtime, "width", lineMeasurement.frame.size.width);
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jsiLine.setProperty(runtime, "height", lineMeasurement.frame.size.height);
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jsiLine.setProperty(runtime, "descender", lineMeasurement.descender);
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jsiLine.setProperty(runtime, "capHeight", lineMeasurement.capHeight);
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jsiLine.setProperty(runtime, "ascender", lineMeasurement.ascender);
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jsiLine.setProperty(runtime, "xHeight", lineMeasurement.xHeight);
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lines.setValueAtIndex(runtime, i, jsiLine);
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}
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payload.setProperty(runtime, "lines", lines);
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return payload;
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}
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void ParagraphEventEmitter::onTextLayout(
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LinesMeasurements const &linesMeasurements) const {
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{
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std::lock_guard<std::mutex> guard(linesMeasurementsMutex_);
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if (linesMeasurementsMetrics_ == linesMeasurements) {
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return;
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}
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linesMeasurementsMetrics_ = linesMeasurements;
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}
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dispatchEvent("textLayout", [linesMeasurements](jsi::Runtime &runtime) {
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return linesMeasurementsPayload(runtime, linesMeasurements);
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});
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}
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} // namespace react
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} // namespace facebook
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