Exclude trailing whitespace from newline character on measuring text line width

[bernhardoj]

Summary:

Multiline text in Android shows some extra space. It's easily noticeable when you set the text alignSelf to flex-start. This is because we are using layout.getLineWidth which will include trailing whitespace.

Based on Android doc, getLineMax exclude trailing whitespace.

Changelog:

[ANDROID] [FIXED] - Exclude trailing whitespace from newline character on measuring text line width

Test Plan:

After applying the changes:

Code snippet:

<Text style={{backgroundColor: 'red', alignSelf: 'flex-start', color: 'white'}}>
    1{'\n'}
</Text>

[bernhardoj]

@NickGerleman here is the new PR.

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
android	hermes	arm64-v8a	8,740,875	-6,901
android	hermes	armeabi-v7a	8,052,196	-8,184
android	hermes	x86	9,231,388	-7,999
android	hermes	x86_64	9,082,752	-6,437
android	jsc	arm64-v8a	9,303,774	-6,558
android	jsc	armeabi-v7a	8,492,427	-7,843
android	jsc	x86	9,365,161	-7,673
android	jsc	x86_64	9,620,620	-6,111

Base commit: 5cc8cee
Branch: main

[facebook-github-bot]

@NickGerleman has imported this pull request. If you are a Meta employee, you can view this diff on Phabricator.

[facebook-github-bot]

@NickGerleman merged this pull request in 83d7a48.