@angular/cdk
Version:
Angular Material Component Development Kit
69 lines • 7.9 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
*/
/**
* A pending copy-to-clipboard operation.
*
* The implementation of copying text to the clipboard modifies the DOM and
* forces a relayout. This relayout can take too long if the string is large,
* causing the execCommand('copy') to happen too long after the user clicked.
* This results in the browser refusing to copy. This object lets the
* relayout happen in a separate tick from copying by providing a copy function
* that can be called later.
*
* Destroy must be called when no longer in use, regardless of whether `copy` is
* called.
*/
var PendingCopy = /** @class */ (function () {
function PendingCopy(text, _document) {
this._document = _document;
var textarea = this._textarea = this._document.createElement('textarea');
var styles = textarea.style;
// Hide the element for display and accessibility. Set an
// absolute position so the page layout isn't affected.
styles.opacity = '0';
styles.position = 'absolute';
styles.left = styles.top = '-999em';
textarea.setAttribute('aria-hidden', 'true');
textarea.value = text;
this._document.body.appendChild(textarea);
}
/** Finishes copying the text. */
PendingCopy.prototype.copy = function () {
var textarea = this._textarea;
var successful = false;
try { // Older browsers could throw if copy is not supported.
if (textarea) {
var currentFocus = this._document.activeElement;
textarea.select();
textarea.setSelectionRange(0, textarea.value.length);
successful = this._document.execCommand('copy');
if (currentFocus && currentFocus instanceof HTMLElement) {
currentFocus.focus();
}
}
}
catch (_a) {
// Discard error.
// Initial setting of {@code successful} will represent failure here.
}
return successful;
};
/** Cleans up DOM changes used to perform the copy operation. */
PendingCopy.prototype.destroy = function () {
var textarea = this._textarea;
if (textarea) {
if (textarea.parentNode) {
textarea.parentNode.removeChild(textarea);
}
this._textarea = undefined;
}
};
return PendingCopy;
}());
export { PendingCopy };
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B0ZXh0YXJlYSA9IHRoaXMuX3RleHRhcmVhO1xuXG4gICAgaWYgKHRleHRhcmVhKSB7XG4gICAgICBpZiAodGV4dGFyZWEucGFyZW50Tm9kZSkge1xuICAgICAgICB0ZXh0YXJlYS5wYXJlbnROb2RlLnJlbW92ZUNoaWxkKHRleHRhcmVhKTtcbiAgICAgIH1cblxuICAgICAgdGhpcy5fdGV4dGFyZWEgPSB1bmRlZmluZWQ7XG4gICAgfVxuICB9XG59XG4iXX0=