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Android TextInput: Improve application of styles for `value` prop (#22461) 

Summary:
Prior to this change, when you passed text to `TextInput` via the `value` or `defaultValue` props, React Native didn't apply any of the styles in `buildSpannedFromShadowNode` to the text. This is because `spannedFromShadowNode` appends `value` after calling `buildSpannedFromShadowNode`. Many styles worked because their logic is included in both `buildSpannedFromShadowNode` and `ReactTextInputManager`. However, some only appear in `buildSpannedFromShadowNode` such as `textDecorationLine` (it would be good to understand why we need to duplicate styling logic in `buildSpannedFromShadowNode` & `ReactTextInputManager` and to know whether `ReactTextInputManager` should be handling `textDecorationLine`).

Also, this commit improves consistency between iOS and Android if you specify both `value` and children on a `TextInput`. Prior to this, iOS concatenated the strings such that the `value` prop came before the children whereas Android put the children before the `value` prop. Now Android matches iOS's behavior and puts the `value` prop before the children.

These appear to be regressions. The `value` prop used to be appended before calling `buildSpannedFromShadowNode` (this behavior appears to have been changed by accident in 80027ce6db (diff-4f5947f2fe0381c4a6373a30e596b8c3)).

The fix is to append the `value` prop before calling `buildSpannedFromShadowNode`. Additionally, we have to expose a new `start` parameter on `buildSpannedFromShadowNode` so that we can tell it to include the text from the `value` prop in the range that it styles. Without this, the start of the styled text would be immediately after `value` because `value` is appended before calling `buildSpannedFromShadowNode`
Pull Request resolved: https://github.com/facebook/react-native/pull/22461

Reviewed By: mdvacca

Differential Revision: D13282065

Pulled By: shergin

fbshipit-source-id: 4c99094741441cf54cdec0075bfd08ff7d889e66
This commit is contained in:
Adam Comella 2019-01-08 15:56:07 -08:00 committed by Facebook Github Bot
parent 2a1faec1ca
commit f6f8b092f9
1 changed files with 7 additions and 6 deletions
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13
ReactAndroid/src/main/java/com/facebook/react/views/text/ReactBaseTextShadowNode.java
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@ -85,9 +85,8 @@ public abstract class ReactBaseTextShadowNode extends LayoutShadowNode {
private static void buildSpannedFromShadowNode(
ReactBaseTextShadowNode textShadowNode,
SpannableStringBuilder sb,
List<SetSpanOperation> ops) {
int start = sb.length();
List<SetSpanOperation> ops,
int start) {
for (int i = 0, length = textShadowNode.getChildCount(); i < length; i++) {
ReactShadowNode child = textShadowNode.getChildAt(i);
@ -95,7 +94,7 @@ public abstract class ReactBaseTextShadowNode extends LayoutShadowNode {
if (child instanceof ReactRawTextShadowNode) {
sb.append(((ReactRawTextShadowNode) child).getText());
} else if (child instanceof ReactBaseTextShadowNode) {
buildSpannedFromShadowNode((ReactBaseTextShadowNode) child, sb, ops);
buildSpannedFromShadowNode((ReactBaseTextShadowNode) child, sb, ops, sb.length());
} else if (child instanceof ReactTextInlineImageShadowNode) {
// We make the image take up 1 character in the span and put a corresponding character into
// the text so that the image doesn't run over any following text.
@ -201,12 +200,14 @@ public abstract class ReactBaseTextShadowNode extends LayoutShadowNode {
// a new spannable will be wiped out
List<SetSpanOperation> ops = new ArrayList<>();
buildSpannedFromShadowNode(textShadowNode, sb, ops);
if (text != null) {
// Handle text that is provided via a prop (e.g. the `value` and `defaultValue` props on
// TextInput).
sb.append(text);
}
buildSpannedFromShadowNode(textShadowNode, sb, ops, 0);
if (textShadowNode.mFontSize == UNSET) {
int defaultFontSize = textShadowNode.getDefaultFontSize();