Summary:
**Motivation**
Whenever a user changes the system font size to its maximum allowable setting, React Native apps that allow font scaling can become unusable because the text gets too big. Experimenting with a native app like iMessage on iOS, the font size used for non-body text (e.g. header, navigational elements) is capped while the body text (e.g. text in the message bubbles) is allowed to grow.
This PR introduces a new prop on `<Text>` and `<TextInput>` called `maxFontSizeMultiplier`. This enables devs to set the maximum allowed text scale factor on a Text/TextInput. The default is 0 which means no limit.
Another PR will add this feature to Android.
**Test Plan**
I created a test app which utilizes all categories of values of `maxFontSizeMultiplier`:
- `undefined`: inherit from parent
- `0`: no limit
- `1`, `1.2`: fixed limits
I tried this with `Text`, `TextInput` with `value`, and `TextInput` with children. For `Text`, I also verified that nesting works properly (if a child `Text` doesn't specify `maxFontSizeMultiplier`, it inherits it from its parent).
Lastly, we've been using a version of this in Skype for several months.
**Release Notes**
[GENERAL] [ENHANCEMENT] [Text/TextInput] - Added maxFontSizeMultiplier prop to prevent some text from getting unusably large as user increases OS's font scale setting (iOS)
Adam Comella
Microsoft Corp.
Pull Request resolved: https://github.com/facebook/react-native/pull/20915
Differential Revision: D9646739
Pulled By: shergin
fbshipit-source-id: c823f59c1e342c22d6297b88b2cb11c5a1f10310
Summary:
A few fixes:
* missing include: folly/Optional.h
* switch folly::Optional's `has_value()` to `hasValue()` for now until folly is upgraded to newer version
* fix up import for RCTTextAttributes.h
* fix up includes for "conversions.h" to use namespaced includes
Reviewed By: mmmulani
Differential Revision: D8021149
fbshipit-source-id: d3955986d3ab6b1d9b61ac1e385767893ce57e5e
Summary:
Issue [#2088](https://github.com/facebook/react-native/issues/2088).
The basic desire is to have a declarative mechanism to transform text content to uppercase or lowercase or titlecase ("capitalized").
My test plan involves having added a test-case to the RNTester app within the `<Text>` component area. I then manually verified that the rendered content met my expectation.
Here is the markup that exercises my enhancement:
```
<View>
<Text style={{ textTransform: 'uppercase'}}>
This text should be uppercased.
</Text>
<Text style={{ textTransform: 'lowercase'}}>
This TEXT SHOULD be lowercased.
</Text>
<Text style={{ textTransform: 'capitalize'}}>
This text should be CAPITALIZED.
</Text>
<Text style={{ textTransform: 'capitalize'}}>
Mixed:{' '}
<Text style={{ textTransform: 'uppercase'}}>
uppercase{' '}
</Text>
<Text style={{ textTransform: 'lowercase'}}>
LoWeRcAsE{' '}
</Text>
<Text style={{ textTransform: 'capitalize'}}>
capitalize each word
</Text>
</Text>
</View>
```
And here is a screenshot of the result:
[Website Documentation PR](https://github.com/facebook/react-native-website/pull/254)
https://github.com/facebook/react-native-website/pull/254
[IOS] [ENHANCEMENT] [Text] - added textTransform style property enabling declarative casing transformations
Closes https://github.com/facebook/react-native/pull/18387
Differential Revision: D7583315
Pulled By: shergin
fbshipit-source-id: a5d22aea2aa4f494b7b25a055abe64799ccbaa79
Summary:
Includes React Native and its dependencies Fresco, Metro, and Yoga. Excludes samples/examples/docs.
find: ^(?:( *)|( *(?:[\*~#]|::))( )? *)?Copyright (?:\(c\) )?(\d{4})\b.+Facebook[\s\S]+?BSD[\s\S]+?(?:this source tree|the same directory)\.$
replace: $1$2$3Copyright (c) $4-present, Facebook, Inc.\n$2\n$1$2$3This source code is licensed under the MIT license found in the\n$1$2$3LICENSE file in the root directory of this source tree.
Reviewed By: TheSavior, yungsters
Differential Revision: D7007050
fbshipit-source-id: 37dd6bf0ffec0923bfc99c260bb330683f35553e
Summary:
This is a complete rewrite of RCTText, the part of React Native which manages Text and TextInput components.
Key points:
* It's understandable now. It follows a simple architectural pattern, and it's easy to debug and iterate. Text flow layout is a first-class citizen in React Native layout system now, not just a wired special case. It also brings entirely new possibilities such as nested interleaving <Text> and <View> components.
* All <Text>-specific APIs were removed from UIManager and co (it's about ~16 public methods which were used exclusively only by <Text>).
* It relies on new Yoga measurement/cloning API and on-dirty handler. So, it removes built-in dirty propagation subsystem from RN completely.
* It caches string fragments properly and granularly on a per-node basis which makes updating text-containing components more performant.
* It does not instantiate UIView for virtual components which reduces memory utilization.
* It drastically improves <TextInput> capabilities (e.g. rich text inside single line <TextInput> is now supported).
Screenshots:
https://cl.ly/2j3r1V0L0324https://cl.ly/3N2V3C3d3q3R
Reviewed By: mmmulani
Differential Revision: D6617326
fbshipit-source-id: 35d4d81b35c9870e9557d0211c0e934e6072a41e
Adam Comella
Kevin Gozali
TomSwift
Sophie Alpert
Valentin Shergin
