mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Samuel Susla
8b821f8f12
Summary: Changelog: [internal] The assumption was wrong. There can be more than one view on iOS in ScrollView. The other view is pull the refresh component. Reviewed By: mdvacca Differential Revision: D26880403 fbshipit-source-id: 69fb1668b5ee7d5f4a4ab3c89222587689c10591
67 lines
1.9 KiB
C++
67 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 "ScrollViewShadowNode.h"
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#include <react/debug/react_native_assert.h>
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#include <react/renderer/core/LayoutMetrics.h>
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namespace facebook {
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namespace react {
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const char ScrollViewComponentName[] = "ScrollView";
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void ScrollViewShadowNode::updateStateIfNeeded() {
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ensureUnsealed();
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auto contentBoundingRect = Rect{};
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for (const auto &childNode : getLayoutableChildNodes()) {
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contentBoundingRect.unionInPlace(childNode->getLayoutMetrics().frame);
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}
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auto state = getStateData();
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if (state.contentBoundingRect != contentBoundingRect) {
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state.contentBoundingRect = contentBoundingRect;
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setStateData(std::move(state));
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}
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}
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void ScrollViewShadowNode::updateScrollContentOffsetIfNeeded() {
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#ifndef ANDROID
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if (getLayoutMetrics().layoutDirection == LayoutDirection::RightToLeft) {
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// Yoga place `contentView` on the right side of `scrollView` when RTL
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// layout is enforced. To correct for this, in RTL setting, correct the
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// frame's origin. React Native Classic does this as well in
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// `RCTScrollContentShadowView.m`.
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for (auto layoutableNode : getLayoutableChildNodes()) {
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auto layoutMetrics = layoutableNode->getLayoutMetrics();
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if (layoutMetrics.frame.origin.x != 0) {
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layoutMetrics.frame.origin.x = 0;
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layoutableNode->setLayoutMetrics(layoutMetrics);
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}
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}
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}
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#endif
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}
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#pragma mark - LayoutableShadowNode
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void ScrollViewShadowNode::layout(LayoutContext layoutContext) {
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ConcreteViewShadowNode::layout(layoutContext);
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updateScrollContentOffsetIfNeeded();
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updateStateIfNeeded();
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}
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Point ScrollViewShadowNode::getContentOriginOffset() const {
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auto contentOffset = getStateData().contentOffset;
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return {-contentOffset.x, -contentOffset.y};
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}
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} // namespace react
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} // namespace facebook
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