@angular/animations
Version:
Angular - animations integration with web-animations
98 lines • 14.1 kB
JavaScript
import { eraseStyles, setStyles } from '../util';
/**
* Returns an instance of `SpecialCasedStyles` if and when any special (non animateable) styles are
* detected.
*
* In CSS there exist properties that cannot be animated within a keyframe animation
* (whether it be via CSS keyframes or web-animations) and the animation implementation
* will ignore them. This function is designed to detect those special cased styles and
* return a container that will be executed at the start and end of the animation.
*
* @returns an instance of `SpecialCasedStyles` if any special styles are detected otherwise `null`
*/
export function packageNonAnimatableStyles(element, styles) {
let startStyles = null;
let endStyles = null;
if (Array.isArray(styles) && styles.length) {
startStyles = filterNonAnimatableStyles(styles[0]);
if (styles.length > 1) {
endStyles = filterNonAnimatableStyles(styles[styles.length - 1]);
}
}
else if (styles instanceof Map) {
startStyles = filterNonAnimatableStyles(styles);
}
return (startStyles || endStyles) ? new SpecialCasedStyles(element, startStyles, endStyles) :
null;
}
/**
* Designed to be executed during a keyframe-based animation to apply any special-cased styles.
*
* When started (when the `start()` method is run) then the provided `startStyles`
* will be applied. When finished (when the `finish()` method is called) the
* `endStyles` will be applied as well any any starting styles. Finally when
* `destroy()` is called then all styles will be removed.
*/
export class SpecialCasedStyles {
static { this.initialStylesByElement = ( /* @__PURE__ */new WeakMap()); }
constructor(_element, _startStyles, _endStyles) {
this._element = _element;
this._startStyles = _startStyles;
this._endStyles = _endStyles;
this._state = 0 /* SpecialCasedStylesState.Pending */;
let initialStyles = SpecialCasedStyles.initialStylesByElement.get(_element);
if (!initialStyles) {
SpecialCasedStyles.initialStylesByElement.set(_element, initialStyles = new Map());
}
this._initialStyles = initialStyles;
}
start() {
if (this._state < 1 /* SpecialCasedStylesState.Started */) {
if (this._startStyles) {
setStyles(this._element, this._startStyles, this._initialStyles);
}
this._state = 1 /* SpecialCasedStylesState.Started */;
}
}
finish() {
this.start();
if (this._state < 2 /* SpecialCasedStylesState.Finished */) {
setStyles(this._element, this._initialStyles);
if (this._endStyles) {
setStyles(this._element, this._endStyles);
this._endStyles = null;
}
this._state = 1 /* SpecialCasedStylesState.Started */;
}
}
destroy() {
this.finish();
if (this._state < 3 /* SpecialCasedStylesState.Destroyed */) {
SpecialCasedStyles.initialStylesByElement.delete(this._element);
if (this._startStyles) {
eraseStyles(this._element, this._startStyles);
this._endStyles = null;
}
if (this._endStyles) {
eraseStyles(this._element, this._endStyles);
this._endStyles = null;
}
setStyles(this._element, this._initialStyles);
this._state = 3 /* SpecialCasedStylesState.Destroyed */;
}
}
}
function filterNonAnimatableStyles(styles) {
let result = null;
styles.forEach((val, prop) => {
if (isNonAnimatableStyle(prop)) {
result = result || new Map();
result.set(prop, val);
}
});
return result;
}
function isNonAnimatableStyle(prop) {
return prop === 'display' || prop === 'position';
}
//# sourceMappingURL=data:application/json;base64,{"version":3,"file":"special_cased_styles.js","sourceRoot":"","sources":["../../../../../../../../packages/animations/browser/src/render/special_cased_styles.ts"],"names":[],"mappings":"AASA,OAAO,EAAC,WAAW,EAAE,SAAS,EAAC,MAAM,SAAS,CAAC;AAE/C;;;;;;;;;;GAUG;AACH,MAAM,UAAU,0BAA0B,CACtC,OAAY,EAAE,MAA0C;IAC1D,IAAI,WAAW,GAAuB,IAAI,CAAC;IAC3C,IAAI,SAAS,GAAuB,IAAI,CAAC;IACzC,IAAI,KAAK,CAAC,OAAO,CAAC,MAAM,CAAC,IAAI,MAAM,CAAC,MAAM,EAAE;QAC1C,WAAW,GAAG,yBAAyB,CAAC,MAAM,CAAC,CAAC,CAAC,CAAC,CAAC;QACnD,IAAI,MAAM,CAAC,MAAM,GAAG,CAAC,EAAE;YACrB,SAAS,GAAG,yBAAyB,CAAC,MAAM,CAAC,MAAM,CAAC,MAAM,GAAG,CAAC,CAAC,CAAC,CAAC;SAClE;KACF;SAAM,IAAI,MAAM,YAAY,GAAG,EAAE;QAChC,WAAW,GAAG,yBAAyB,CAAC,MAAM,CAAC,CAAC;KACjD;IAED,OAAO,CAAC,WAAW,IAAI,SAAS,CAAC,CAAC,CAAC,CAAC,IAAI,kBAAkB,CAAC,OAAO,EAAE,WAAW,EAAE,SAAS,CAAC,CAAC,CAAC;QACzD,IAAI,CAAC;AAC3C,CAAC;AAED;;;;;;;GAOG;AACH,MAAM,OAAO,kBAAkB;aACtB,2BAAsB,GAAG,EAAC,eAAgB,IAAI,OAAO,EAAsB,CAAC,AAAtD,CAAuD;IAKpF,YACY,QAAa,EAAU,YAAgC,EACvD,UAA8B;QAD9B,aAAQ,GAAR,QAAQ,CAAK;QAAU,iBAAY,GAAZ,YAAY,CAAoB;QACvD,eAAU,GAAV,UAAU,CAAoB;QALlC,WAAM,2CAAmC;QAM/C,IAAI,aAAa,GAAG,kBAAkB,CAAC,sBAAsB,CAAC,GAAG,CAAC,QAAQ,CAAC,CAAC;QAC5E,IAAI,CAAC,aAAa,EAAE;YAClB,kBAAkB,CAAC,sBAAsB,CAAC,GAAG,CAAC,QAAQ,EAAE,aAAa,GAAG,IAAI,GAAG,EAAE,CAAC,CAAC;SACpF;QACD,IAAI,CAAC,cAAc,GAAG,aAAa,CAAC;IACtC,CAAC;IAED,KAAK;QACH,IAAI,IAAI,CAAC,MAAM,0CAAkC,EAAE;YACjD,IAAI,IAAI,CAAC,YAAY,EAAE;gBACrB,SAAS,CAAC,IAAI,CAAC,QAAQ,EAAE,IAAI,CAAC,YAAY,EAAE,IAAI,CAAC,cAAc,CAAC,CAAC;aAClE;YACD,IAAI,CAAC,MAAM,0CAAkC,CAAC;SAC/C;IACH,CAAC;IAED,MAAM;QACJ,IAAI,CAAC,KAAK,EAAE,CAAC;QACb,IAAI,IAAI,CAAC,MAAM,2CAAmC,EAAE;YAClD,SAAS,CAAC,IAAI,CAAC,QAAQ,EAAE,IAAI,CAAC,cAAc,CAAC,CAAC;YAC9C,IAAI,IAAI,CAAC,UAAU,EAAE;gBACnB,SAAS,CAAC,IAAI,CAAC,QAAQ,EAAE,IAAI,CAAC,UAAU,CAAC,CAAC;gBAC1C,IAAI,CAAC,UAAU,GAAG,IAAI,CAAC;aACxB;YACD,IAAI,CAAC,MAAM,0CAAkC,CAAC;SAC/C;IACH,CAAC;IAED,OAAO;QACL,IAAI,CAAC,MAAM,EAAE,CAAC;QACd,IAAI,IAAI,CAAC,MAAM,4CAAoC,EAAE;YACnD,kBAAkB,CAAC,sBAAsB,CAAC,MAAM,CAAC,IAAI,CAAC,QAAQ,CAAC,CAAC;YAChE,IAAI,IAAI,CAAC,YAAY,EAAE;gBACrB,WAAW,CAAC,IAAI,CAAC,QAAQ,EAAE,IAAI,CAAC,YAAY,CAAC,CAAC;gBAC9C,IAAI,CAAC,UAAU,GAAG,IAAI,CAAC;aACxB;YACD,IAAI,IAAI,CAAC,UAAU,EAAE;gBACnB,WAAW,CAAC,IAAI,CAAC,QAAQ,EAAE,IAAI,CAAC,UAAU,CAAC,CAAC;gBAC5C,IAAI,CAAC,UAAU,GAAG,IAAI,CAAC;aACxB;YACD,SAAS,CAAC,IAAI,CAAC,QAAQ,EAAE,IAAI,CAAC,cAAc,CAAC,CAAC;YAC9C,IAAI,CAAC,MAAM,4CAAoC,CAAC;SACjD;IACH,CAAC;;AAoBH,SAAS,yBAAyB,CAAC,MAAqB;IACtD,IAAI,MAAM,GAAuB,IAAI,CAAC;IACtC,MAAM,CAAC,OAAO,CAAC,CAAC,GAAG,EAAE,IAAI,EAAE,EAAE;QAC3B,IAAI,oBAAoB,CAAC,IAAI,CAAC,EAAE;YAC9B,MAAM,GAAG,MAAM,IAAI,IAAI,GAAG,EAAE,CAAC;YAC7B,MAAM,CAAC,GAAG,CAAC,IAAI,EAAE,GAAG,CAAC,CAAC;SACvB;IACH,CAAC,CAAC,CAAC;IACH,OAAO,MAAM,CAAC;AAChB,CAAC;AAED,SAAS,oBAAoB,CAAC,IAAY;IACxC,OAAO,IAAI,KAAK,SAAS,IAAI,IAAI,KAAK,UAAU,CAAC;AACnD,CAAC","sourcesContent":["/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {ɵStyleDataMap} from '@angular/animations';\n\nimport {eraseStyles, setStyles} from '../util';\n\n/**\n * Returns an instance of `SpecialCasedStyles` if and when any special (non animateable) styles are\n * detected.\n *\n * In CSS there exist properties that cannot be animated within a keyframe animation\n * (whether it be via CSS keyframes or web-animations) and the animation implementation\n * will ignore them. This function is designed to detect those special cased styles and\n * return a container that will be executed at the start and end of the animation.\n *\n * @returns an instance of `SpecialCasedStyles` if any special styles are detected otherwise `null`\n */\nexport function packageNonAnimatableStyles(\n    element: any, styles: ɵStyleDataMap|Array<ɵStyleDataMap>): SpecialCasedStyles|null {\n  let startStyles: ɵStyleDataMap|null = null;\n  let endStyles: ɵStyleDataMap|null = null;\n  if (Array.isArray(styles) && styles.length) {\n    startStyles = filterNonAnimatableStyles(styles[0]);\n    if (styles.length > 1) {\n      endStyles = filterNonAnimatableStyles(styles[styles.length - 1]);\n    }\n  } else if (styles instanceof Map) {\n    startStyles = filterNonAnimatableStyles(styles);\n  }\n\n  return (startStyles || endStyles) ? new SpecialCasedStyles(element, startStyles, endStyles) :\n                                      null;\n}\n\n/**\n * Designed to be executed during a keyframe-based animation to apply any special-cased styles.\n *\n * When started (when the `start()` method is run) then the provided `startStyles`\n * will be applied. When finished (when the `finish()` method is called) the\n * `endStyles` will be applied as well any any starting styles. Finally when\n * `destroy()` is called then all styles will be removed.\n */\nexport class SpecialCasedStyles {\n  static initialStylesByElement = (/* @__PURE__ */ new WeakMap<any, ɵStyleDataMap>());\n\n  private _state = SpecialCasedStylesState.Pending;\n  private _initialStyles!: ɵStyleDataMap;\n\n  constructor(\n      private _element: any, private _startStyles: ɵStyleDataMap|null,\n      private _endStyles: ɵStyleDataMap|null) {\n    let initialStyles = SpecialCasedStyles.initialStylesByElement.get(_element);\n    if (!initialStyles) {\n      SpecialCasedStyles.initialStylesByElement.set(_element, initialStyles = new Map());\n    }\n    this._initialStyles = initialStyles;\n  }\n\n  start() {\n    if (this._state < SpecialCasedStylesState.Started) {\n      if (this._startStyles) {\n        setStyles(this._element, this._startStyles, this._initialStyles);\n      }\n      this._state = SpecialCasedStylesState.Started;\n    }\n  }\n\n  finish() {\n    this.start();\n    if (this._state < SpecialCasedStylesState.Finished) {\n      setStyles(this._element, this._initialStyles);\n      if (this._endStyles) {\n        setStyles(this._element, this._endStyles);\n        this._endStyles = null;\n      }\n      this._state = SpecialCasedStylesState.Started;\n    }\n  }\n\n  destroy() {\n    this.finish();\n    if (this._state < SpecialCasedStylesState.Destroyed) {\n      SpecialCasedStyles.initialStylesByElement.delete(this._element);\n      if (this._startStyles) {\n        eraseStyles(this._element, this._startStyles);\n        this._endStyles = null;\n      }\n      if (this._endStyles) {\n        eraseStyles(this._element, this._endStyles);\n        this._endStyles = null;\n      }\n      setStyles(this._element, this._initialStyles);\n      this._state = SpecialCasedStylesState.Destroyed;\n    }\n  }\n}\n\n/**\n * An enum of states reflective of what the status of `SpecialCasedStyles` is.\n *\n * Depending on how `SpecialCasedStyles` is interacted with, the start and end\n * styles may not be applied in the same way. This enum ensures that if and when\n * the ending styles are applied then the starting styles are applied. It is\n * also used to reflect what the current status of the special cased styles are\n * which helps prevent the starting/ending styles not be applied twice. It is\n * also used to cleanup the styles once `SpecialCasedStyles` is destroyed.\n */\nconst enum SpecialCasedStylesState {\n  Pending = 0,\n  Started = 1,\n  Finished = 2,\n  Destroyed = 3,\n}\n\nfunction filterNonAnimatableStyles(styles: ɵStyleDataMap): ɵStyleDataMap|null {\n  let result: ɵStyleDataMap|null = null;\n  styles.forEach((val, prop) => {\n    if (isNonAnimatableStyle(prop)) {\n      result = result || new Map();\n      result.set(prop, val);\n    }\n  });\n  return result;\n}\n\nfunction isNonAnimatableStyle(prop: string) {\n  return prop === 'display' || prop === 'position';\n}\n"]}