mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Ahmed El-Helw
c62840c7a8
Summary: Text in Nodes is squashed into a single DrawCommand for drawing a Boring or StaticLayout. Touch is handled using a TextNodeRegion subclass of NodeRegion that knows how to identify pieces of text inside of the DrawCommand based on spans in the text. However, we only use a TextNodeRegion on the second call for updateNodeRegion for an RCTText. If there is only one call, the NodeRegion will just be a normal one. This patch ensures that the NodeRegion for an RCTText is always a TextNodeRegion, allowing for null Layouts that are set when the DrawCommand is made. Reviewed By: astreet Differential Revision: D3291682
63 lines
1.7 KiB
Java
63 lines
1.7 KiB
Java
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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package com.facebook.react.flat;
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import javax.annotation.Nullable;
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import android.text.Layout;
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import android.text.Spanned;
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/* package */ final class TextNodeRegion extends NodeRegion {
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private @Nullable Layout mLayout;
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/* package */ TextNodeRegion(
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float left,
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float top,
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float right,
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float bottom,
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int tag,
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boolean isVirtual,
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@Nullable Layout layout) {
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super(left, top, right, bottom, tag, isVirtual);
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mLayout = layout;
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}
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public void setLayout(Layout layout) {
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mLayout = layout;
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}
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/* package */ @Nullable Layout getLayout() {
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return mLayout;
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}
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/* package */ int getReactTag(float touchX, float touchY) {
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if (mLayout != null) {
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int y = Math.round(touchY - mTop);
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if (y >= mLayout.getLineTop(0) && y < mLayout.getLineBottom(mLayout.getLineCount() - 1)) {
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float x = Math.round(touchX - mLeft);
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int line = mLayout.getLineForVertical(y);
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if (mLayout.getLineLeft(line) <= x && x <= mLayout.getLineRight(line)) {
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int off = mLayout.getOffsetForHorizontal(line, x);
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Spanned text = (Spanned) mLayout.getText();
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RCTRawText[] link = text.getSpans(off, off, RCTRawText.class);
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if (link.length != 0) {
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return link[0].getReactTag();
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}
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}
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}
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}
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return super.getReactTag(touchX, touchY);
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}
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}
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