538 lines
20 KiB
JavaScript
538 lines
20 KiB
JavaScript
/**
|
|
* Copyright (c) 2015-present, Facebook, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This source code is licensed under the BSD-style license found in the
|
|
* LICENSE file in the root directory of this source tree. An additional grant
|
|
* of patent rights can be found in the PATENTS file in the same directory.
|
|
*
|
|
* @providesModule View
|
|
* @flow
|
|
*/
|
|
'use strict';
|
|
|
|
const EdgeInsetsPropType = require('EdgeInsetsPropType');
|
|
const NativeMethodsMixin = require('NativeMethodsMixin');
|
|
const NativeModules = require('NativeModules');
|
|
const React = require('React');
|
|
const ReactNativeStyleAttributes = require('ReactNativeStyleAttributes');
|
|
const ReactNativeViewAttributes = require('ReactNativeViewAttributes');
|
|
const StyleSheetPropType = require('StyleSheetPropType');
|
|
const ViewStylePropTypes = require('ViewStylePropTypes');
|
|
|
|
const requireNativeComponent = require('requireNativeComponent');
|
|
|
|
const PropTypes = React.PropTypes;
|
|
|
|
const stylePropType = StyleSheetPropType(ViewStylePropTypes);
|
|
|
|
const AccessibilityTraits = [
|
|
'none',
|
|
'button',
|
|
'link',
|
|
'header',
|
|
'search',
|
|
'image',
|
|
'selected',
|
|
'plays',
|
|
'key',
|
|
'text',
|
|
'summary',
|
|
'disabled',
|
|
'frequentUpdates',
|
|
'startsMedia',
|
|
'adjustable',
|
|
'allowsDirectInteraction',
|
|
'pageTurn',
|
|
];
|
|
|
|
const AccessibilityComponentType = [
|
|
'none',
|
|
'button',
|
|
'radiobutton_checked',
|
|
'radiobutton_unchecked',
|
|
];
|
|
|
|
const forceTouchAvailable = (NativeModules.IOSConstants &&
|
|
NativeModules.IOSConstants.forceTouchAvailable) || false;
|
|
|
|
const statics = {
|
|
AccessibilityTraits,
|
|
AccessibilityComponentType,
|
|
/**
|
|
* Is 3D Touch / Force Touch available (i.e. will touch events include `force`)
|
|
* @platform ios
|
|
*/
|
|
forceTouchAvailable,
|
|
};
|
|
|
|
/**
|
|
* The most fundamental component for building a UI, `View` is a container that supports layout with
|
|
* [flexbox](/react-native/docs/flexbox.html), [style](/react-native/docs/style.html),
|
|
* [some touch handling](/react-native/docs/handling-touches.html), and
|
|
* [accessibility](/react-native/docs/accessibility.html) controls. `View` maps directly to the
|
|
* native view equivalent on whatever platform React Native is running on, whether that is a
|
|
* `UIView`, `<div>`, `android.view`, etc.
|
|
*
|
|
* `View` is designed to be nested inside other views and can have 0 to many children of any type.
|
|
*
|
|
* This example creates a `View` that wraps two colored boxes and a text component in a row with
|
|
* padding.
|
|
*
|
|
* ```javascript
|
|
* class ViewColoredBoxesWithText extends Component {
|
|
* render() {
|
|
* return (
|
|
* <View style={{flexDirection: 'row', height: 100, padding: 20}}>
|
|
* <View style={{backgroundColor: 'blue', flex: 0.3}} />
|
|
* <View style={{backgroundColor: 'red', flex: 0.5}} />
|
|
* <Text>Hello World!</Text>
|
|
* </View>
|
|
* );
|
|
* }
|
|
* }
|
|
* ```
|
|
*
|
|
* > `View`s are designed to be used with [`StyleSheet`](/react-native/docs/style.html) for clarity
|
|
* > and performance, although inline styles are also supported.
|
|
*
|
|
* ### Synthetic Touch Events
|
|
*
|
|
* For `View` responder props (e.g., `onResponderMove`), the synthetic touch event passed to them
|
|
* are of the following form:
|
|
*
|
|
* - `nativeEvent`
|
|
* - `changedTouches` - Array of all touch events that have changed since the last event.
|
|
* - `identifier` - The ID of the touch.
|
|
* - `locationX` - The X position of the touch, relative to the element.
|
|
* - `locationY` - The Y position of the touch, relative to the element.
|
|
* - `pageX` - The X position of the touch, relative to the root element.
|
|
* - `pageY` - The Y position of the touch, relative to the root element.
|
|
* - `target` - The node id of the element receiving the touch event.
|
|
* - `timestamp` - A time identifier for the touch, useful for velocity calculation.
|
|
* - `touches` - Array of all current touches on the screen.
|
|
*/
|
|
const View = React.createClass({
|
|
// TODO: We should probably expose the mixins, viewConfig, and statics publicly. For example,
|
|
// one of the props is of type AccessibilityComponentType. That is defined as a const[] above,
|
|
// but it is not rendered by the docs, since `statics` below is not rendered. So its Possible
|
|
// values had to be hardcoded.
|
|
mixins: [NativeMethodsMixin],
|
|
|
|
/**
|
|
* `NativeMethodsMixin` will look for this when invoking `setNativeProps`. We
|
|
* make `this` look like an actual native component class.
|
|
*/
|
|
viewConfig: {
|
|
uiViewClassName: 'RCTView',
|
|
validAttributes: ReactNativeViewAttributes.RCTView
|
|
},
|
|
|
|
statics: {
|
|
...statics,
|
|
},
|
|
|
|
propTypes: {
|
|
/**
|
|
* When `true`, indicates that the view is an accessibility element. By default,
|
|
* all the touchable elements are accessible.
|
|
*/
|
|
accessible: PropTypes.bool,
|
|
|
|
/**
|
|
* Overrides the text that's read by the screen reader when the user interacts
|
|
* with the element. By default, the label is constructed by traversing all the
|
|
* children and accumulating all the `Text` nodes separated by space.
|
|
*/
|
|
accessibilityLabel: PropTypes.node,
|
|
|
|
/**
|
|
* Indicates to accessibility services to treat UI component like a
|
|
* native one. Works for Android only.
|
|
*
|
|
* Possible values are one of:
|
|
*
|
|
* - `'none'`
|
|
* - `'button'`
|
|
* - `'radiobutton_checked'`
|
|
* - `'radiobutton_unchecked'`
|
|
*
|
|
* @platform android
|
|
*/
|
|
accessibilityComponentType: PropTypes.oneOf(AccessibilityComponentType),
|
|
|
|
/**
|
|
* Indicates to accessibility services whether the user should be notified
|
|
* when this view changes. Works for Android API >= 19 only.
|
|
* Possible values:
|
|
*
|
|
* - `'none'` - Accessibility services should not announce changes to this view.
|
|
* - `'polite'`- Accessibility services should announce changes to this view.
|
|
* - `'assertive'` - Accessibility services should interrupt ongoing speech to immediately announce changes to this view.
|
|
*
|
|
* See the [Android `View` docs](http://developer.android.com/reference/android/view/View.html#attr_android:accessibilityLiveRegion)
|
|
* for reference.
|
|
*
|
|
* @platform android
|
|
*/
|
|
accessibilityLiveRegion: PropTypes.oneOf([
|
|
'none',
|
|
'polite',
|
|
'assertive',
|
|
]),
|
|
|
|
/**
|
|
* Controls how view is important for accessibility which is if it
|
|
* fires accessibility events and if it is reported to accessibility services
|
|
* that query the screen. Works for Android only.
|
|
*
|
|
* Possible values:
|
|
*
|
|
* - `'auto'` - The system determines whether the view is important for accessibility -
|
|
* default (recommended).
|
|
* - `'yes'` - The view is important for accessibility.
|
|
* - `'no'` - The view is not important for accessibility.
|
|
* - `'no-hide-descendants'` - The view is not important for accessibility,
|
|
* nor are any of its descendant views.
|
|
*
|
|
* See the [Android `importantForAccessibility` docs](http://developer.android.com/reference/android/R.attr.html#importantForAccessibility)
|
|
* for reference.
|
|
*
|
|
* @platform android
|
|
*/
|
|
importantForAccessibility: PropTypes.oneOf([
|
|
'auto',
|
|
'yes',
|
|
'no',
|
|
'no-hide-descendants',
|
|
]),
|
|
|
|
/**
|
|
* Provides additional traits to screen reader. By default no traits are
|
|
* provided unless specified otherwise in element.
|
|
*
|
|
* You can provide one trait or an array of many traits.
|
|
*
|
|
* Possible values for `AccessibilityTraits` are:
|
|
*
|
|
* - `'none'` - The element has no traits.
|
|
* - `'button'` - The element should be treated as a button.
|
|
* - `'link'` - The element should be treated as a link.
|
|
* - `'header'` - The element is a header that divides content into sections.
|
|
* - `'search'` - The element should be treated as a search field.
|
|
* - `'image'` - The element should be treated as an image.
|
|
* - `'selected'` - The element is selected.
|
|
* - `'plays'` - The element plays sound.
|
|
* - `'key'` - The element should be treated like a keyboard key.
|
|
* - `'text'` - The element should be treated as text.
|
|
* - `'summary'` - The element provides app summary information.
|
|
* - `'disabled'` - The element is disabled.
|
|
* - `'frequentUpdates'` - The element frequently changes its value.
|
|
* - `'startsMedia'` - The element starts a media session.
|
|
* - `'adjustable'` - The element allows adjustment over a range of values.
|
|
* - `'allowsDirectInteraction'` - The element allows direct touch interaction for VoiceOver users.
|
|
* - `'pageTurn'` - Informs VoiceOver that it should scroll to the next page when it finishes reading the contents of the element.
|
|
*
|
|
* See the [Accessibility guide](/react-native/docs/accessibility.html#accessibilitytraits-ios)
|
|
* for more information.
|
|
*
|
|
* @platform ios
|
|
*/
|
|
accessibilityTraits: PropTypes.oneOfType([
|
|
PropTypes.oneOf(AccessibilityTraits),
|
|
PropTypes.arrayOf(PropTypes.oneOf(AccessibilityTraits)),
|
|
]),
|
|
|
|
/**
|
|
* When `accessible` is true, the system will try to invoke this function
|
|
* when the user performs accessibility tap gesture.
|
|
*/
|
|
onAccessibilityTap: PropTypes.func,
|
|
|
|
/**
|
|
* When `accessible` is `true`, the system will invoke this function when the
|
|
* user performs the magic tap gesture.
|
|
*/
|
|
onMagicTap: PropTypes.func,
|
|
|
|
/**
|
|
* Used to locate this view in end-to-end tests.
|
|
*
|
|
* > This disables the 'layout-only view removal' optimization for this view!
|
|
*/
|
|
testID: PropTypes.string,
|
|
|
|
/**
|
|
* For most touch interactions, you'll simply want to wrap your component in
|
|
* `TouchableHighlight` or `TouchableOpacity`. Check out `Touchable.js`,
|
|
* `ScrollResponder.js` and `ResponderEventPlugin.js` for more discussion.
|
|
*/
|
|
|
|
/**
|
|
* The View is now responding for touch events. This is the time to highlight and show the user
|
|
* what is happening.
|
|
*
|
|
* `View.props.onResponderGrant: (event) => {}`, where `event` is a synthetic touch event as
|
|
* described above.
|
|
*/
|
|
onResponderGrant: PropTypes.func,
|
|
|
|
/**
|
|
* The user is moving their finger.
|
|
*
|
|
* `View.props.onResponderMove: (event) => {}`, where `event` is a synthetic touch event as
|
|
* described above.
|
|
*/
|
|
onResponderMove: PropTypes.func,
|
|
|
|
/**
|
|
* Another responder is already active and will not release it to that `View` asking to be
|
|
* the responder.
|
|
*
|
|
* `View.props.onResponderReject: (event) => {}`, where `event` is a synthetic touch event as
|
|
* described above.
|
|
*/
|
|
onResponderReject: PropTypes.func,
|
|
|
|
/**
|
|
* Fired at the end of the touch.
|
|
*
|
|
* `View.props.onResponderRelease: (event) => {}`, where `event` is a synthetic touch event as
|
|
* described above.
|
|
*/
|
|
onResponderRelease: PropTypes.func,
|
|
|
|
/**
|
|
* The responder has been taken from the `View`. Might be taken by other views after a call to
|
|
* `onResponderTerminationRequest`, or might be taken by the OS without asking (e.g., happens
|
|
* with control center/ notification center on iOS)
|
|
*
|
|
* `View.props.onResponderTerminate: (event) => {}`, where `event` is a synthetic touch event as
|
|
* described above.
|
|
*/
|
|
onResponderTerminate: PropTypes.func,
|
|
|
|
/**
|
|
* Some other `View` wants to become responder and is asking this `View` to release its
|
|
* responder. Returning `true` allows its release.
|
|
*
|
|
* `View.props.onResponderTerminationRequest: (event) => {}`, where `event` is a synthetic touch
|
|
* event as described above.
|
|
*/
|
|
onResponderTerminationRequest: PropTypes.func,
|
|
|
|
/**
|
|
* Does this view want to become responder on the start of a touch?
|
|
*
|
|
* `View.props.onStartShouldSetResponder: (event) => [true | false]`, where `event` is a
|
|
* synthetic touch event as described above.
|
|
*/
|
|
onStartShouldSetResponder: PropTypes.func,
|
|
|
|
/**
|
|
* If a parent `View` wants to prevent a child `View` from becoming responder on a touch start,
|
|
* it should have this handler which returns `true`.
|
|
*
|
|
* `View.props.onStartShouldSetResponderCapture: (event) => [true | false]`, where `event` is a
|
|
* synthetic touch event as described above.
|
|
*/
|
|
onStartShouldSetResponderCapture: PropTypes.func,
|
|
|
|
/**
|
|
* Does this view want to "claim" touch responsiveness? This is called for every touch move on
|
|
* the `View` when it is not the responder.
|
|
*
|
|
* `View.props.onMoveShouldSetResponder: (event) => [true | false]`, where `event` is a
|
|
* synthetic touch event as described above.
|
|
*/
|
|
onMoveShouldSetResponder: PropTypes.func,
|
|
|
|
/**
|
|
* If a parent `View` wants to prevent a child `View` from becoming responder on a move,
|
|
* it should have this handler which returns `true`.
|
|
*
|
|
* `View.props.onMoveShouldSetResponderCapture: (event) => [true | false]`, where `event` is a
|
|
* synthetic touch event as described above.
|
|
*/
|
|
onMoveShouldSetResponderCapture: PropTypes.func,
|
|
|
|
/**
|
|
* This defines how far a touch event can start away from the view.
|
|
* Typical interface guidelines recommend touch targets that are at least
|
|
* 30 - 40 points/density-independent pixels.
|
|
*
|
|
* For example, if a touchable view has a height of 20 the touchable height can be extended to
|
|
* 40 with `hitSlop={{top: 10, bottom: 10, left: 0, right: 0}}`
|
|
*
|
|
* > The touch area never extends past the parent view bounds and the Z-index
|
|
* > of sibling views always takes precedence if a touch hits two overlapping
|
|
* > views.
|
|
*/
|
|
hitSlop: EdgeInsetsPropType,
|
|
|
|
/**
|
|
* Invoked on mount and layout changes with:
|
|
*
|
|
* `{nativeEvent: { layout: {x, y, width, height}}}`
|
|
*
|
|
* This event is fired immediately once the layout has been calculated, but
|
|
* the new layout may not yet be reflected on the screen at the time the
|
|
* event is received, especially if a layout animation is in progress.
|
|
*/
|
|
onLayout: PropTypes.func,
|
|
|
|
/**
|
|
* Controls whether the `View` can be the target of touch events.
|
|
*
|
|
* - `'auto'`: The View can be the target of touch events.
|
|
* - `'none'`: The View is never the target of touch events.
|
|
* - `'box-none'`: The View is never the target of touch events but it's
|
|
* subviews can be. It behaves like if the view had the following classes
|
|
* in CSS:
|
|
* ```
|
|
* .box-none {
|
|
* pointer-events: none;
|
|
* }
|
|
* .box-none * {
|
|
* pointer-events: all;
|
|
* }
|
|
* ```
|
|
* - `'box-only'`: The view can be the target of touch events but it's
|
|
* subviews cannot be. It behaves like if the view had the following classes
|
|
* in CSS:
|
|
* ```
|
|
* .box-only {
|
|
* pointer-events: all;
|
|
* }
|
|
* .box-only * {
|
|
* pointer-events: none;
|
|
* }
|
|
* ```
|
|
* > Since `pointerEvents` does not affect layout/appearance, and we are
|
|
* > already deviating from the spec by adding additional modes, we opt to not
|
|
* > include `pointerEvents` on `style`. On some platforms, we would need to
|
|
* > implement it as a `className` anyways. Using `style` or not is an
|
|
* > implementation detail of the platform.
|
|
*/
|
|
pointerEvents: PropTypes.oneOf([
|
|
'box-none',
|
|
'none',
|
|
'box-only',
|
|
'auto',
|
|
]),
|
|
style: stylePropType,
|
|
|
|
/**
|
|
* This is a special performance property exposed by `RCTView` and is useful
|
|
* for scrolling content when there are many subviews, most of which are
|
|
* offscreen. For this property to be effective, it must be applied to a
|
|
* view that contains many subviews that extend outside its bound. The
|
|
* subviews must also have `overflow: hidden`, as should the containing view
|
|
* (or one of its superviews).
|
|
*/
|
|
removeClippedSubviews: PropTypes.bool,
|
|
|
|
/**
|
|
* Whether this `View` should render itself (and all of its children) into a
|
|
* single hardware texture on the GPU.
|
|
*
|
|
* On Android, this is useful for animations and interactions that only
|
|
* modify opacity, rotation, translation, and/or scale: in those cases, the
|
|
* view doesn't have to be redrawn and display lists don't need to be
|
|
* re-executed. The texture can just be re-used and re-composited with
|
|
* different parameters. The downside is that this can use up limited video
|
|
* memory, so this prop should be set back to false at the end of the
|
|
* interaction/animation.
|
|
*
|
|
* @platform android
|
|
*/
|
|
renderToHardwareTextureAndroid: PropTypes.bool,
|
|
|
|
/**
|
|
* Whether this `View` should be rendered as a bitmap before compositing.
|
|
*
|
|
* On iOS, this is useful for animations and interactions that do not
|
|
* modify this component's dimensions nor its children; for example, when
|
|
* translating the position of a static view, rasterization allows the
|
|
* renderer to reuse a cached bitmap of a static view and quickly composite
|
|
* it during each frame.
|
|
*
|
|
* Rasterization incurs an off-screen drawing pass and the bitmap consumes
|
|
* memory. Test and measure when using this property.
|
|
*
|
|
* @platform ios
|
|
*/
|
|
shouldRasterizeIOS: PropTypes.bool,
|
|
|
|
/**
|
|
* Views that are only used to layout their children or otherwise don't draw
|
|
* anything may be automatically removed from the native hierarchy as an
|
|
* optimization. Set this property to `false` to disable this optimization and
|
|
* ensure that this `View` exists in the native view hierarchy.
|
|
*
|
|
* @platform android
|
|
*/
|
|
collapsable: PropTypes.bool,
|
|
|
|
/**
|
|
* Whether this `View` needs to rendered offscreen and composited with an alpha
|
|
* in order to preserve 100% correct colors and blending behavior. The default
|
|
* (`false`) falls back to drawing the component and its children with an alpha
|
|
* applied to the paint used to draw each element instead of rendering the full
|
|
* component offscreen and compositing it back with an alpha value. This default
|
|
* may be noticeable and undesired in the case where the `View` you are setting
|
|
* an opacity on has multiple overlapping elements (e.g. multiple overlapping
|
|
* `View`s, or text and a background).
|
|
*
|
|
* Rendering offscreen to preserve correct alpha behavior is extremely
|
|
* expensive and hard to debug for non-native developers, which is why it is
|
|
* not turned on by default. If you do need to enable this property for an
|
|
* animation, consider combining it with renderToHardwareTextureAndroid if the
|
|
* view **contents** are static (i.e. it doesn't need to be redrawn each frame).
|
|
* If that property is enabled, this View will be rendered off-screen once,
|
|
* saved in a hardware texture, and then composited onto the screen with an alpha
|
|
* each frame without having to switch rendering targets on the GPU.
|
|
*
|
|
* @platform android
|
|
*/
|
|
needsOffscreenAlphaCompositing: PropTypes.bool,
|
|
},
|
|
|
|
render: function() {
|
|
// WARNING: This method will not be used in production mode as in that mode we
|
|
// replace wrapper component View with generated native wrapper RCTView. Avoid
|
|
// adding functionality this component that you'd want to be available in both
|
|
// dev and prod modes.
|
|
return <RCTView {...this.props} />;
|
|
},
|
|
});
|
|
|
|
const RCTView = requireNativeComponent('RCTView', View, {
|
|
nativeOnly: {
|
|
nativeBackgroundAndroid: true,
|
|
nativeForegroundAndroid: true,
|
|
}
|
|
});
|
|
|
|
if (__DEV__) {
|
|
const UIManager = require('UIManager');
|
|
const viewConfig = UIManager.viewConfigs && UIManager.viewConfigs.RCTView || {};
|
|
for (const prop in viewConfig.nativeProps) {
|
|
const viewAny: any = View; // Appease flow
|
|
if (!viewAny.propTypes[prop] && !ReactNativeStyleAttributes[prop]) {
|
|
throw new Error(
|
|
'View is missing propType for native prop `' + prop + '`'
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
let ViewToExport = RCTView;
|
|
if (__DEV__) {
|
|
ViewToExport = View;
|
|
} else {
|
|
Object.assign(RCTView, statics);
|
|
}
|
|
|
|
module.exports = ViewToExport;
|