@angular/cdk
Version:
Angular Material Component Development Kit
54 lines • 6.76 kB
JavaScript
/**
* @license
* Copyright Google LLC 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 { __extends, __read, __spread } from "tslib";
import { coerceBooleanProperty } from '@angular/cdk/coercion';
/**
* Mixin to provide a directive with a function that checks if the sticky input has been
* changed since the last time the function was called. Essentially adds a dirty-check to the
* sticky value.
* @docs-private
*/
export function mixinHasStickyInput(base) {
return /** @class */ (function (_super) {
__extends(class_1, _super);
function class_1() {
var args = [];
for (var _i = 0; _i < arguments.length; _i++) {
args[_i] = arguments[_i];
}
var _this = _super.apply(this, __spread(args)) || this;
_this._sticky = false;
/** Whether the sticky input has changed since it was last checked. */
_this._hasStickyChanged = false;
return _this;
}
Object.defineProperty(class_1.prototype, "sticky", {
/** Whether sticky positioning should be applied. */
get: function () { return this._sticky; },
set: function (v) {
var prevValue = this._sticky;
this._sticky = coerceBooleanProperty(v);
this._hasStickyChanged = prevValue !== this._sticky;
},
enumerable: true,
configurable: true
});
/** Whether the sticky value has changed since this was last called. */
class_1.prototype.hasStickyChanged = function () {
var hasStickyChanged = this._hasStickyChanged;
this._hasStickyChanged = false;
return hasStickyChanged;
};
/** Resets the dirty check for cases where the sticky state has been used without checking. */
class_1.prototype.resetStickyChanged = function () {
this._hasStickyChanged = false;
};
return class_1;
}(base));
}
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