Commit Graph

122 Commits

Author SHA1 Message Date
Sophie Alpert 1490ab12ef Update license headers for MIT license
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
2018-02-16 18:31:53 -08:00
Valentin Shergin f91f7d91a1 Reimagining of RCTShadowView layout API
Summary:
This is reimagining of interoperability layer between Yoga and ShadowViews (at least in Yoga -> RN part).
Goals:
 * Make it clear and easy.
 * Make clear separation between "what layout what", now parent always layout children, noone layout itself.
 * Make possible to interleave Yoga layout with custom imperative layout (may be used in SafeAreaView, Text, Modal, InputAccessoryView and so on).

Reviewed By: mmmulani

Differential Revision: D6863654

fbshipit-source-id: 5a6a933874f121d46f744aab99a31ae42ddd4a1b
2018-02-12 00:32:43 -08:00
Valentin Shergin 114c258045 Enabling round-to-pixel Yoga feature for RN (iOS)
Summary:
This change enables built-in Yoga mechanism which rounds producing layout metrics to closest "pixel" values.
See previous diff for more context.

Reviewed By: fkgozali

Differential Revision: D6889762

fbshipit-source-id: bc2eea44704db4b377e2e14fab9f67be8c935719
2018-02-05 22:17:22 -08:00
Valentin Shergin ceb1d1ca5b Removing our own implementation of round-to-pixel algorithm
Summary:
> Okay, I don't remember where we first met
> But hey, admitting is the first step

This issue has a looong history.
The original algorithm was introduced by Nick Lockwood (nicklockwood Hey Nick! We miss you!) a while ago and from the very beginning this has one small error that basically makes it useless (try to find it yourself, it's fun!)
The problem was discovered and fixed twice (D4133643, D4983054), but every time we found that our <Text> infra was not ready for this, so we reverted and abandoned the change. As part of the last attempt to finally solve the issue, I ported the algorithm to Yoga where it lives today and works very well for Lytho and CK.
For now, the vision is clear:
 * The basic algorithm should live in Yoga for unification and performance reasons.
 * We still have to have `absolutePostion` as part of this API because it might be useful for some components which implement its own custom/non-Yoga-based layout.
 * We have to enable it in RN eventually.

So, this is the first step: Removing old, broken code which we don't plan to fix and use.

Make React Native crisp again!

Reviewed By: fkgozali

Differential Revision: D6888662

fbshipit-source-id: 2e5098d9935dcbe05d66c777dad3a9ec8ac87ec3
2018-02-05 22:17:22 -08:00
Valentin Shergin 9dfa2e7f3c Removed `[ShadowView collectUpdatedFrames:]`
Summary: Another juicy leftover from old Text implementation.

Reviewed By: fkgozali

Differential Revision: D6887942

fbshipit-source-id: d0363d06d566554c03d0ae3293597daf9c387028
2018-02-05 22:17:22 -08:00
Valentin Shergin 0f9fc4b295 `processUpdatedProperties` & `collectUpdatedProperties` was removed from RCTShadowView
Summary: This is leftovers from last <Text> reimplementation; nobody uses it and it does not hooked up with UIManager.

Reviewed By: fkgozali

Differential Revision: D6887795

fbshipit-source-id: 9e2e29af4ba959270096eeb494666d1cacaeba32
2018-02-05 22:17:22 -08:00
Valentin Shergin e3ff3cf6cb Removed outdated assertion in RCTShadowView related to breaking change in Yoga
Summary: It's been more than two years; I think everyone already migrated and learned the new behavior.

Reviewed By: emilsjolander

Differential Revision: D6829885

fbshipit-source-id: a86d56fb7235a137e9ce6e360d7ae2224b047313
2018-01-29 10:47:14 -08:00
Valentin Shergin 2716f53220 The New <Text> on iOS
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/2j3r1V0L0324
https://cl.ly/3N2V3C3d3q3R

Reviewed By: mmmulani

Differential Revision: D6617326

fbshipit-source-id: 35d4d81b35c9870e9557d0211c0e934e6072a41e
2018-01-24 00:03:01 -08:00
Valentin Shergin 7d1dedadd7 New implementation of handling `didUpdateReactSubviews` and `didUpdateReactSubviews` events
Summary:
Motivation:
* Current implementation of `didUpdateReactSubviews` relies on `processUpdatedProperties:parentProperties:` method of RCTShadowView, which we plan to remove.
* The existing implementation does not call handlers on unmounted nodes (because they are not part of traversing tree), which is not correct.
* The current implementation is tight with RCTComponentData, which is conceptually wrong, it should be a UIManager thing.
* The new implementation must be much more performant because of simplicity. (We can measure it only after removing `processUpdatedProperties`.)

Reviewed By: mmmulani

Differential Revision: D6595780

fbshipit-source-id: a517207c17b5d5db839c9ce99a37136292acf78c
2017-12-19 23:46:09 -08:00
Valentin Shergin 19a9c5e41d The Great File Renaming in RCTText
Summary:
The previous file/class name convention seemed cool... but now it drives me BANANAS! It makes all this code really hard to maintain.
So, evething were renamed following common modern RN convention.

Reviewed By: mmmulani

Differential Revision: D6605090

fbshipit-source-id: 88ca13d793a5d2adaac2b7922ec6bd4654aacec5
2017-12-19 20:14:00 -08:00
Pritesh Nandgaonkar f1055bcac8 Make YGNode as c++ struct with properties exposed through accessors
Reviewed By: emilsjolander

Differential Revision: D6592257

fbshipit-source-id: 641e8b9462ad00731a094511f9f5608b23a6bb21
2017-12-19 11:32:49 -08:00
Valentin Shergin 2679f3efb6 Demolishing of background color propagation infra
Summary: As it was mentioned in previous diffs, we are removing this because it overcomplicates rendering layer and provides (almost) no benefits (and cannot be implemented 100% accurate way).

Reviewed By: mmmulani

Differential Revision: D6582560

fbshipit-source-id: 0778db96a45dd8e2520268d5d00792677cb01a20
2017-12-19 09:11:49 -08:00
Valentin Shergin 2789ba016b zIndex prop was removed from RCTShadowView
Summary:
This was leftovers from old implementation of zIndex feature.
Janic janicduplessis refactored this and moved all logic to UIView layer, so we don't need this prop anymore in shadow realm.
More info: https://github.com/facebook/react-native/pull/14011

Reviewed By: mmmulani

Differential Revision: D6574414

fbshipit-source-id: 2cae19350765689784d7884ed875878d39b4e3f1
2017-12-18 11:47:26 -08:00
Ramanpreet Nara efa4d3c222 Rename I18nManager Left/Right swap methods
Reviewed By: fkgozali

Differential Revision: D6140072

fbshipit-source-id: 282dc614c036de8f217a729f21a1bbe92b8afd7d
2017-10-24 20:45:59 -07:00
Ramanpreet Nara 64284bf66e iOS: Implement margin(Start|End) styles for RN
Reviewed By: mmmulani

Differential Revision: D5884168

fbshipit-source-id: 4d37583ba79324e6cf8caaa20cecf865f28337f7
2017-10-18 19:33:31 -07:00
Ramanpreet Nara 0a70c026cb iOS: Implement padding(Start|End) styles for RN
Reviewed By: mmmulani

Differential Revision: D5876934

fbshipit-source-id: 55fc49e0fddeaf0e6541d3159f35783e02bd6260
2017-10-18 19:33:31 -07:00
Ramanpreet Nara 1b5f8d3ee5 iOS: Implement border(Top|Bottom)(Start|End)Radius and border(Start|End)(Color|Width) RN styles
Reviewed By: shergin

Differential Revision: D5874536

fbshipit-source-id: 5ad237bddb70745aef0341cddb172da5ee388c38
2017-10-18 19:33:31 -07:00
Ramanpreet Nara 38b5506599 iOS: Forward RN start/end styles to Yoga
Reviewed By: mmmulani

Differential Revision: D5853589

fbshipit-source-id: 9acee0993a25dce5f4b1ce506746b789b1c4c763
2017-10-18 19:33:31 -07:00
Valentin Shergin 32e5c8e5b5 Deprecated stuff was removed from RCTShadowView
Summary: It was deprecated awhile ago.

Reviewed By: javache

Differential Revision: D5990504

fbshipit-source-id: a218410d17f5f450d573338522b689e035106aba
2017-10-09 17:22:35 -07:00
Valentin Shergin b0c1bd284f `[RCTShadowView localData]` is now only setter.
Summary: It saves 8 bytes per shadowView instance, and it is more logical because it does nothing by default.

Reviewed By: javache

Differential Revision: D5997804

fbshipit-source-id: c985a11aeea881e95911469e10c8c27429a2718a
2017-10-09 10:46:08 -07:00
Ramanpreet Nara 992ade1fc5 Re-render views when direction changes
Reviewed By: shergin

Differential Revision: D5959573

fbshipit-source-id: 36b2cde921362a934a2c88a3ed05be5082ed08bf
2017-10-03 13:01:06 -07:00
Jason Carreiro abed3cf6c4 Revert D5944488: [RN][iOS]: Re-render views when direction changes
Differential Revision: D5944488

fbshipit-source-id: 79e695dcc0ea7d09544ace1525828333a5818c5a
2017-10-02 12:19:25 -07:00
Ramanpreet Nara 9bbc70c442 Re-render views when direction changes
Summary:
This is required for D5874536, wherein I'll be introducing direction-aware props for borders.

When a view's border changes due to a direction update, only the frames of its children update. Therefore, only the children `UIView`s get a chance to be re-rendered. This is incorrect because the view that's had its borders changed also needs to re-render. So, I keep a track of the layout direction in a property on all shadow views. Then, when I update that prop within `applyLayoutNode`, I push shadow views into the `viewsWithNewFrames` set.

Reviewed By: mmmulani

Differential Revision: D5944488

fbshipit-source-id: 3f23e9973f3555612920703cdb6cec38e6360d2d
2017-10-02 11:15:48 -07:00
Kellie Medlin e846a9f82f Fix build errors exposed by building against clang 5.0
Reviewed By: rachit-siamwalla

Differential Revision: D5828898

fbshipit-source-id: 23fa587bcd1d1b6c612cc816f1aa7b03da0c187d
2017-09-14 00:35:02 -07:00
Valentin Shergin 7b962397b6 Fixed clowntoun related to `-[RCTShadowView canHaveSubviews]`
Summary:
Shame on me.
Naming can be hard. We have to use positive logic to avoid this kind of bugs. :(

In the bright future we also have to rename `isYogaLeafNode` to something with positive logic, like `canHaveYogaChildNodes`.
But before we can do this, we have to have solid plan how to unify it with Android.

Reviewed By: mmmulani

Differential Revision: D5780917

fbshipit-source-id: 1ddaaea06f5618b91528cc87f1433a55b5fae4ac
2017-09-06 23:51:57 -07:00
Valentin Shergin ac3f345b07 Fixed assertion caused by invalid layout of hidden Yoga nodes
Summary:
That's interesting!
If we apply `display: none;` style to some node, Yoga will stop calculation layout for this subtree (which is reasonable).
So, from RN perspective we have to stop applying layout for hidden subtree because it is meaningless and causes another errors.

Note: We do actually not support `display: none;` yet. It stops computing layout, but it does not hide the views!

Reviewed By: javache

Differential Revision: D5168651

fbshipit-source-id: 29a9385c76a0f9d637285fc0d268ccc39879ca0a
2017-06-20 17:16:46 -07:00
Valentin Shergin abfa63c67e Introducing -[RCTShadowView canHaveSubviews]
Summary:
Override `canHaveSubviews` in RCTShadowView subclass to disallow any nested content.
For now, this prop will be checked only in DEV mode for performance reasons.

Reviewed By: javache

Differential Revision: D5189083

fbshipit-source-id: 87087dd806e1fd7320128dab969b13642174f81c
2017-06-20 17:16:46 -07:00
Janic Duplessis 1658f36630 Improve z-index implementation on iOS
Summary:
This avoids reordering views because it created some bugs when the native hierarchy is different from the shadow views. This leverages `layer.zPosition` and takes z-index in consideration when we check what view should be the target of a touch.

**Test plan**
Tested that this fixes some layout issues that occurred when using sticky headers in the Expo home screen.
Closes https://github.com/facebook/react-native/pull/14011

Differential Revision: D5108437

Pulled By: shergin

fbshipit-source-id: 0abfe85666e9d236a190e6f54cdd5453cacfbcac
2017-05-28 21:45:32 -07:00
Valentin Shergin 5058e7eb05 Several layout related helper methods of RCTShadowView was moved to new (+Layout) category.
Reviewed By: javache

Differential Revision: D4865327

fbshipit-source-id: 4df71b57433370ee09c3f1288c4d6241a33f440a
2017-05-08 11:31:20 -07:00
Valentin Shergin 18fd18e792 Assertion on attempt to get layout metrics from dirtied Yoga node
Reviewed By: javache

Differential Revision: D4865294

fbshipit-source-id: e1bd2f297af87ffa817003f9e4dae94ad2c96644
2017-05-01 12:16:42 -07:00
Lukas Wöhrl 992e37c8bc Fix sizing of non strech items
Summary:
Fixes the sizing of items so that under most scenarios it calcultes its height by it's content for non exact measurings. This introduces a new useLegacyStretchBehaviour flag on the config to opt out of this change as it is breaking.

See facebook/yoga#505
Closes https://github.com/facebook/yoga/pull/506

Reviewed By: astreet

Differential Revision: D4954016

Pulled By: emilsjolander

fbshipit-source-id: d28bd5d174cd76951fb94df85e3b0cfab7f81ff7
2017-04-28 06:18:30 -07:00
Valentin Shergin ca07a5fd5f Adopting Yoga's YGConfig in RCTShadowView
Reviewed By: javache

Differential Revision: D4932540

fbshipit-source-id: 4a5ff3b34fc635b3291dff9a7c1a603179c90fa7
2017-04-27 13:05:55 -07:00
Pieter De Baets 41f3d0cf2d Expose getter for 'flex' property
Summary: Helps mitigate part of https://github.com/facebook/react-native/pull/12245 while we wait for a more comprehensive solution.

Reviewed By: emilsjolander

Differential Revision: D4571776

fbshipit-source-id: 185cd1b0d3af37724136a37471df412c2000dfe4
2017-03-13 06:00:19 -07:00
Emil Sjolander 4d69f4b2d1 Add display:none support to react native
Summary:
This diff adds display:none support to React Native. This enables hiding components which still calling their render method and keeping them within the state of your application. This enables preserving state in a component even though the component is not visible. Previously this was often implemented by rendering a component off screen as a work around. See below playground for usage.

```
class Playground extends React.Component {
  render() {
    return (
      <View style={{width: '100%', height: '100%', flexDirection: 'row', backgroundColor: 'white'}}>
        <View style={{width: 100, height: 100, display: 'none', backgroundColor: 'red'}}/>
        <View style={{width: 100, height: 100, backgroundColor: 'blue'}}/>
      </View>
    );
  }
}
```

Reviewed By: astreet

Differential Revision: D4611771

fbshipit-source-id: 0dbe0494d989df42994ab9ad5125d47f3233cc5a
2017-03-01 09:16:05 -08:00
Emil Sjolander 31f848a5fa Expose alignContent to react native
Summary:
This diff adds alignContent (https://developer.mozilla.org/en-US/docs/Web/CSS/align-content) support to React Native. This enables aligning the lines of multi-line content. See below playground for example usage.

```
class Playground extends React.Component {
  render() {
    return (
      <View style={{width: '100%', height: '100%', flexDirection: 'row', backgroundColor: 'white', flexWrap: 'wrap', alignContent: 'space-between'}}>
        <View style={{width: 100, height: 100, marginLeft: 10, marginTop: 10, backgroundColor: 'red'}}/>
        <View style={{width: 100, height: 100, marginLeft: 10, marginTop: 10, backgroundColor: 'red'}}/>
        <View style={{width: 100, height: 100, marginLeft: 10, marginTop: 10, backgroundColor: 'red'}}/>
        <View style={{width: 100, height: 100, marginLeft: 10, marginTop: 10, backgroundColor: 'red'}}/>
        <View style={{width: 100, height: 100, marginLeft: 10, marginTop: 10, backgroundColor: 'red'}}/>
        <View style={{width: 100, height: 100, marginLeft: 10, marginTop: 10, backgroundColor: 'red'}}/>
        <View style={{width: 100, height: 100, marginLeft: 10, marginTop: 10, backgroundColor: 'red'}}/>
      </View>
    );
  }
}
```

Reviewed By: astreet

Differential Revision: D4611803

fbshipit-source-id: ae7f6b4b7e9f4bc78d2502da948214294aad4dd2
2017-03-01 09:16:05 -08:00
Emil Sjolander cc275557be Add margin auto support to react native
Summary:
This diff adds margin:auto (https://drafts.csswg.org/css-flexbox-1/#auto-margins) support to React Native. This enables layout not previously supported without inserting empty 'spacer' views. See below Playground for usage.

```
class Playground extends React.Component {
  render() {
    return (
      <View style={{width: '100%', height: '100%', flexDirection: 'row', backgroundColor: 'white'}}>
        <View style={{width: 100, height: 100, backgroundColor: 'red'}}/>
        <View style={{width: 100, height: 100, marginLeft: 'auto', backgroundColor: 'blue'}}/>
      </View>
    );
  }
}
```

Reviewed By: astreet

Differential Revision: D4611753

fbshipit-source-id: e78335565c193f7fb263129a638b444715ba5ab0
2017-03-01 09:16:05 -08:00
Emil Sjolander 702564fb60 Pass the parent size to YGNodeCalculateLayout instead of the node size
Reviewed By: astreet

Differential Revision: D4611417

fbshipit-source-id: 2fb0eedffa17f0ec89b601722a1717a72e216b9e
2017-02-28 08:14:51 -08:00
Valentin Shergin e361ce8673 `RCTShadowViews`'s `cssNode` property was renamed to `yogaNode`
Reviewed By: javache

Differential Revision: D4590104

fbshipit-source-id: 7767aaa62bcbdce2746c3a26543052dd46be63e0
2017-02-21 08:45:05 -08:00
Emil Sjolander 1b5eb36e2f Fix up some small issues with YGUnitAuto
Reviewed By: wwjholmes

Differential Revision: D4567045

fbshipit-source-id: ace5fd89bd534a6bb5ec7dba0c3afbf13d62d7c9
2017-02-16 06:59:33 -08:00
David Hart 67f6b32409 Rename YGUnitPixel to YGPoint...
Summary:
...to reflect the modern world we live in with dynamic DPI platforms :)
Closes https://github.com/facebook/yoga/pull/375

Reviewed By: dshahidehpour

Differential Revision: D4528518

Pulled By: emilsjolander

fbshipit-source-id: e422bd4ae148e02c598a7b484a6adfa8c0e1e0c9
2017-02-14 14:31:31 -08:00
Lukas Wöhrl dbaa687518 Feature auto margin
Summary:
Even so I know there are some opinions against ```margin: 0 auto``` it's still part of the spec: https://www.w3.org/TR/css-flexbox-1/#auto-margins and pretty usefull if you have to position via ```justify-content```.

This PR adds an implementation for that.

It adds an additonal ```YGUnitAuto``` and margins got ```YGNodeStyleSetMarginAuto``` functions as well.
Closes https://github.com/facebook/yoga/pull/357

Reviewed By: astreet

Differential Revision: D4501142

Pulled By: emilsjolander

fbshipit-source-id: 86519f8632496f46e78a7c9dbc5b21e212e3e0c7
2017-02-14 14:31:31 -08:00
Valentin Shergin 7686274e13 Removed RTL workaround in RCTShadowText
Reviewed By: fkgozali

Differential Revision: D4511274

fbshipit-source-id: f658afb4e1c943cc9ecab2dd2a91f251edd3fa36
2017-02-13 12:00:57 -08:00
Valentin Shergin ec673d0771 Added support of `direction` style property
Summary: Now layout direction (LTR or LTR) can be specified not only for whole app but also for view subtree via `direction` style property.

Reviewed By: mmmulani

Differential Revision: D4510206

fbshipit-source-id: 4e56c5886b6e42f2343165eb76be897e681c5ba4
2017-02-06 21:00:16 -08:00
Valentin Shergin 91910d87de Better RTL support especially for ScrollView's
Reviewed By: fkgozali

Differential Revision: D4478913

fbshipit-source-id: 525c17fa109ad3c35161b10940776f1426ba2535
2017-02-02 09:58:30 -08:00
Valentin Shergin f33f84e75f Deprecating/removing `setFrame`, `setLeftTop`, and co.
Summary:
Motivation:
 * `RCTShadowView`'s `frame` property actually represents computed layout of the view. We must not use it as a setter for yoga node styles;
 * Using `frame` and `setLeftTop` in existing way actually works only for view with absolute positioning, so it is super rare and special case;
 * Internally, setting `frame` only make sense to `RootView`, and in that case there we always must not change `origin` we are introducing `setSize` method.

Changes:
 * `[-RCTShadowView setFrame:]` was removed, `frame` property is readonly now;
 * `[-RCTShadowView setLeftTop:]` was removed; no replacement provided;
 * `[-RCTShadowView size]` read-write property was added;
 * `[-RCTUIManager setFrame:forView:]` was deprecated, use (just introduced) `setSize:forView:` instead;
 * `[-RCTUIManager setSize:forView:]` was added.

If you are still need some of removed methods, you are probably doing something wrong. Consider using `setIntrinsicContentSize`-family methods,
`setSize`-family methods, or (in the worst case) accessing `yogaNode` directly.

Reviewed By: javache

Differential Revision: D4491384

fbshipit-source-id: 56dd84567324c5a86e4c870a41c38322dc1224d2
2017-02-01 13:13:27 -08:00
Valentin Shergin d1990f8fc4 Better (right) implementation of `intrinsicContentSize`
Reviewed By: emilsjolander

Differential Revision: D4486767

fbshipit-source-id: d37ea11f9f48425d4d99c29e8bfb6c8ed2353f04
2017-01-31 16:58:32 -08:00
Emil Sjolander 3f49e743be Add percentage support to react native
Summary:
Adds support for percentage value in react native.

syntax: property: 100 | property | '100%'

supported properties:
padding
margin
width
height
minWidth
minHeight
maxWidth
maxHeight
flexBasis

```
class Playground extends React.Component {
  render() {
    return (
      <View style={{backgroundColor: 'white', padding: 10, paddingTop: 30, height: '100%'}}>
        <Text>
          If you want to quickly test out something,
          open the Playground.js file and start coding.
        </Text>
        <View style={{backgroundColor: 'red', height: 50, width: 50}}/>
        <View style={{backgroundColor: 'blue', height: '50%', width: '50%'}}/>
      </View>
    );
  }
}
```

Reviewed By: astreet

Differential Revision: D4376549

fbshipit-source-id: c41d68a7555396f95d063a7527ee081773ac56dc
2017-01-11 03:58:37 -08:00
Emil Sjolander 5d6ce0e4ae Rely on yoga to enforces precedence rules
Reviewed By: javache

Differential Revision: D4376526

fbshipit-source-id: b37e541f74674ce0c918cc4993943a972bc4dc87
2017-01-06 06:43:45 -08:00
Emil Sjolander 828addcf55 Use layout padding instead of style padding
Reviewed By: javache

Differential Revision: D4377071

fbshipit-source-id: c4a534a07f335c39ec50214e33a41aeff0389bf1
2017-01-06 06:43:45 -08:00
Lukas Woehrl 16359ec8ee Add feature to use percentage as value unit
Summary:
Adds the feature to use percentage as a value unit.

You can use the function ```YGPx(float)``` and ```YGPercent(float)``` for convenience.

I did some benchmarks:

```
Without Percentage Feature - Release x86:

Stack with flex: median: 0.000000 ms, stddev: 0.146683 ms
Align stretch in undefined axis: median: 0.000000 ms, stddev: 0.136525 ms
Nested flex: median: 0.000000 ms, stddev: 0.490101 ms
Huge nested layout: median: 23.000000 ms, stddev: 0.928291 ms

Stack with flex: median: 0.000000 ms, stddev: 0.170587 ms
Align stretch in undefined axis: median: 0.000000 ms, stddev: 0.143384 ms
Nested flex: median: 0.000000 ms, stddev: 0.477791 ms
Huge nested layout: median: 22.000000 ms, stddev: 2.129779 ms

With Percentage Feature - Release x86:

Stack with flex: median: 0.000000 ms, stddev: 0.132951 ms
Align stretch in undefined axis: median: 0.000000 ms, stddev: 0.136525 ms
Nested flex: median: 0.000000 ms, stddev: 0.489570 ms
Huge nested layout: median: 21.000000 ms, stddev: 1.390476 ms
Closes https://github.com/facebook/yoga/pull/258

Reviewed By: dshahidehpour

Differential Revision: D4361945

Pulled By: emilsjolander

fbshipit-source-id: a8f5bc63ad352eb9410d792729e56664468cd76a
2017-01-02 05:28:30 -08:00