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shared.ts
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shared.ts
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/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import {AUTO_STYLE, AnimationEvent, AnimationPlayer, NoopAnimationPlayer, ɵAnimationGroupPlayer, ɵPRE_STYLE as PRE_STYLE, ɵStyleData} from '@angular/animations';
import {AnimationStyleNormalizer} from '../../src/dsl/style_normalization/animation_style_normalizer';
import {AnimationDriver} from '../../src/render/animation_driver';
// We don't include ambient node types here since @angular/animations/browser
// is meant to target the browser so technically it should not depend on node
// types. `process` is just declared locally here as a result.
declare const process: any;
export function isBrowser(): boolean {
return (typeof window !== 'undefined' && typeof window.document !== 'undefined');
}
export function isNode(): boolean {
// Checking only for `process` isn't enough to identify whether or not we're in a Node
// environment, because Webpack by default will polyfill the `process`. While we can discern
// that Webpack polyfilled it by looking at `process.browser`, it's very Webpack-specific and
// might not be future-proof. Instead we look at the stringified version of `process` which
// is `[object process]` in Node and `[object Object]` when polyfilled.
return typeof process !== 'undefined' && {}.toString.call(process) === '[object process]';
}
export function optimizeGroupPlayer(players: AnimationPlayer[]): AnimationPlayer {
switch (players.length) {
case 0:
return new NoopAnimationPlayer();
case 1:
return players[0];
default:
return new ɵAnimationGroupPlayer(players);
}
}
export function normalizeKeyframes(
driver: AnimationDriver, normalizer: AnimationStyleNormalizer, element: any,
keyframes: ɵStyleData[], preStyles: ɵStyleData = {},
postStyles: ɵStyleData = {}): ɵStyleData[] {
const errors: string[] = [];
const normalizedKeyframes: ɵStyleData[] = [];
let previousOffset = -1;
let previousKeyframe: ɵStyleData|null = null;
keyframes.forEach(kf => {
const offset = kf['offset'] as number;
const isSameOffset = offset == previousOffset;
const normalizedKeyframe: ɵStyleData = (isSameOffset && previousKeyframe) || {};
Object.keys(kf).forEach(prop => {
let normalizedProp = prop;
let normalizedValue = kf[prop];
if (prop !== 'offset') {
normalizedProp = normalizer.normalizePropertyName(normalizedProp, errors);
switch (normalizedValue) {
case PRE_STYLE:
normalizedValue = preStyles[prop];
break;
case AUTO_STYLE:
normalizedValue = postStyles[prop];
break;
default:
normalizedValue =
normalizer.normalizeStyleValue(prop, normalizedProp, normalizedValue, errors);
break;
}
}
normalizedKeyframe[normalizedProp] = normalizedValue;
});
if (!isSameOffset) {
normalizedKeyframes.push(normalizedKeyframe);
}
previousKeyframe = normalizedKeyframe;
previousOffset = offset;
});
if (errors.length) {
const LINE_START = '\n - ';
throw new Error(
`Unable to animate due to the following errors:${LINE_START}${errors.join(LINE_START)}`);
}
return normalizedKeyframes;
}
export function listenOnPlayer(
player: AnimationPlayer, eventName: string, event: AnimationEvent | undefined,
callback: (event: any) => any) {
switch (eventName) {
case 'start':
player.onStart(() => callback(event && copyAnimationEvent(event, 'start', player)));
break;
case 'done':
player.onDone(() => callback(event && copyAnimationEvent(event, 'done', player)));
break;
case 'destroy':
player.onDestroy(() => callback(event && copyAnimationEvent(event, 'destroy', player)));
break;
}
}
export function copyAnimationEvent(
e: AnimationEvent, phaseName: string, player: AnimationPlayer): AnimationEvent {
const totalTime = player.totalTime;
const disabled = (player as any).disabled ? true : false;
const event = makeAnimationEvent(
e.element, e.triggerName, e.fromState, e.toState, phaseName || e.phaseName,
totalTime == undefined ? e.totalTime : totalTime, disabled);
const data = (e as any)['_data'];
if (data != null) {
(event as any)['_data'] = data;
}
return event;
}
export function makeAnimationEvent(
element: any, triggerName: string, fromState: string, toState: string, phaseName: string = '',
totalTime: number = 0, disabled?: boolean): AnimationEvent {
return {element, triggerName, fromState, toState, phaseName, totalTime, disabled: !!disabled};
}
export function getOrSetAsInMap(
map: Map<any, any>| {[key: string]: any}, key: any, defaultValue: any) {
let value: any;
if (map instanceof Map) {
value = map.get(key);
if (!value) {
map.set(key, value = defaultValue);
}
} else {
value = map[key];
if (!value) {
value = map[key] = defaultValue;
}
}
return value;
}
export function parseTimelineCommand(command: string): [string, string] {
const separatorPos = command.indexOf(':');
const id = command.substring(1, separatorPos);
const action = command.substr(separatorPos + 1);
return [id, action];
}
let _contains: (elm1: any, elm2: any) => boolean = (elm1: any, elm2: any) => false;
let _matches: (element: any, selector: string) => boolean = (element: any, selector: string) =>
false;
let _query: (element: any, selector: string, multi: boolean) => any[] =
(element: any, selector: string, multi: boolean) => {
return [];
};
// Define utility methods for browsers and platform-server(domino) where Element
// and utility methods exist.
const _isNode = isNode();
if (_isNode || typeof Element !== 'undefined') {
// this is well supported in all browsers
_contains = (elm1: any, elm2: any) => { return elm1.contains(elm2) as boolean; };
_matches = (() => {
if (_isNode || Element.prototype.matches) {
return (element: any, selector: string) => element.matches(selector);
} else {
const proto = Element.prototype as any;
const fn = proto.matchesSelector || proto.mozMatchesSelector || proto.msMatchesSelector ||
proto.oMatchesSelector || proto.webkitMatchesSelector;
if (fn) {
return (element: any, selector: string) => fn.apply(element, [selector]);
} else {
return _matches;
}
}
})();
_query = (element: any, selector: string, multi: boolean): any[] => {
let results: any[] = [];
if (multi) {
results.push(...element.querySelectorAll(selector));
} else {
const elm = element.querySelector(selector);
if (elm) {
results.push(elm);
}
}
return results;
};
}
function containsVendorPrefix(prop: string): boolean {
// Webkit is the only real popular vendor prefix nowadays
// cc: http://shouldiprefix.com/
return prop.substring(1, 6) == 'ebkit'; // webkit or Webkit
}
let _CACHED_BODY: {style: any}|null = null;
let _IS_WEBKIT = false;
export function validateStyleProperty(prop: string): boolean {
if (!_CACHED_BODY) {
_CACHED_BODY = getBodyNode() || {};
_IS_WEBKIT = _CACHED_BODY !.style ? ('WebkitAppearance' in _CACHED_BODY !.style) : false;
}
let result = true;
if (_CACHED_BODY !.style && !containsVendorPrefix(prop)) {
result = prop in _CACHED_BODY !.style;
if (!result && _IS_WEBKIT) {
const camelProp = 'Webkit' + prop.charAt(0).toUpperCase() + prop.substr(1);
result = camelProp in _CACHED_BODY !.style;
}
}
return result;
}
export function getBodyNode(): any|null {
if (typeof document != 'undefined') {
return document.body;
}
return null;
}
export const matchesElement = _matches;
export const containsElement = _contains;
export const invokeQuery = _query;
export function hypenatePropsObject(object: {[key: string]: any}): {[key: string]: any} {
const newObj: {[key: string]: any} = {};
Object.keys(object).forEach(prop => {
const newProp = prop.replace(/([a-z])([A-Z])/g, '$1-$2');
newObj[newProp] = object[prop];
});
return newObj;
}
/**
* Returns the computed style for the provided property on the provided element.
*
* This function uses `window.getComputedStyle` internally to determine the
* style value for the element. Firefox doesn't support reading the shorthand
* forms of margin/padding and for this reason this function needs to account
* for that.
*/
export function computeStyle(element: HTMLElement, prop: string): string {
const styles = window.getComputedStyle(element);
// this is casted to any because the `CSSStyleDeclaration` type is a fixed
// set of properties and `prop` is a dynamic reference to a property within
// the `CSSStyleDeclaration` list.
let value = getComputedValue(styles, prop as keyof CSSStyleDeclaration);
// Firefox returns empty string values for `margin` and `padding` properties
// when extracted using getComputedStyle (see similar issue here:
// https://github.com/jquery/jquery/issues/3383). In this situation
// we want to emulate the value that is returned by creating the top,
// right, bottom and left properties as individual style lookups.
if (value.length === 0 && (prop === 'margin' || prop === 'padding')) {
const t = getComputedValue(styles, (prop + 'Top') as 'marginTop' | 'paddingTop');
const r = getComputedValue(styles, (prop + 'Right') as 'marginRight' | 'paddingRight');
const b = getComputedValue(styles, (prop + 'Bottom') as 'marginBottom' | 'paddingBottom');
const l = getComputedValue(styles, (prop + 'Left') as 'marginLeft' | 'paddingLeft');
// reconstruct the padding/margin value as `top right bottom left`
// we `trim()` the value because if all of the values above are
// empty string values then we would like the return value to
// also be an empty string.
value = `${t} ${r} ${b} ${l}`.trim();
}
return value;
}
/**
* Reads and returns the provided property style from the provided styles collection.
*
* This function is useful because it will return an empty string in the
* event that the value obtained from the styles collection is a non-string
* value (which is usually the case if the `styles` object is mocked out).
*/
function getComputedValue<K extends keyof CSSStyleDeclaration>(
styles: CSSStyleDeclaration, prop: K): string {
const value = styles[prop];
return typeof value === 'string' ? value : '';
}