source: trip-planner-front/node_modules/@angular/cdk/esm2015/clipboard/pending-copy.js

Last change on this file was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

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1/**
2 * @license
3 * Copyright Google LLC All Rights Reserved.
4 *
5 * Use of this source code is governed by an MIT-style license that can be
6 * found in the LICENSE file at https://angular.io/license
7 */
8/**
9 * A pending copy-to-clipboard operation.
10 *
11 * The implementation of copying text to the clipboard modifies the DOM and
12 * forces a relayout. This relayout can take too long if the string is large,
13 * causing the execCommand('copy') to happen too long after the user clicked.
14 * This results in the browser refusing to copy. This object lets the
15 * relayout happen in a separate tick from copying by providing a copy function
16 * that can be called later.
17 *
18 * Destroy must be called when no longer in use, regardless of whether `copy` is
19 * called.
20 */
21export class PendingCopy {
22 constructor(text, _document) {
23 this._document = _document;
24 const textarea = this._textarea = this._document.createElement('textarea');
25 const styles = textarea.style;
26 // Hide the element for display and accessibility. Set a fixed position so the page layout
27 // isn't affected. We use `fixed` with `top: 0`, because focus is moved into the textarea
28 // for a split second and if it's off-screen, some browsers will attempt to scroll it into view.
29 styles.position = 'fixed';
30 styles.top = styles.opacity = '0';
31 styles.left = '-999em';
32 textarea.setAttribute('aria-hidden', 'true');
33 textarea.value = text;
34 this._document.body.appendChild(textarea);
35 }
36 /** Finishes copying the text. */
37 copy() {
38 const textarea = this._textarea;
39 let successful = false;
40 try { // Older browsers could throw if copy is not supported.
41 if (textarea) {
42 const currentFocus = this._document.activeElement;
43 textarea.select();
44 textarea.setSelectionRange(0, textarea.value.length);
45 successful = this._document.execCommand('copy');
46 if (currentFocus) {
47 currentFocus.focus();
48 }
49 }
50 }
51 catch (_a) {
52 // Discard error.
53 // Initial setting of {@code successful} will represent failure here.
54 }
55 return successful;
56 }
57 /** Cleans up DOM changes used to perform the copy operation. */
58 destroy() {
59 const textarea = this._textarea;
60 if (textarea) {
61 if (textarea.parentNode) {
62 textarea.parentNode.removeChild(textarea);
63 }
64 this._textarea = undefined;
65 }
66 }
67}
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VjY2Vzc2Z1bDtcbiAgfVxuXG4gIC8qKiBDbGVhbnMgdXAgRE9NIGNoYW5nZXMgdXNlZCB0byBwZXJmb3JtIHRoZSBjb3B5IG9wZXJhdGlvbi4gKi9cbiAgZGVzdHJveSgpIHtcbiAgICBjb25zdCB0ZXh0YXJlYSA9IHRoaXMuX3RleHRhcmVhO1xuXG4gICAgaWYgKHRleHRhcmVhKSB7XG4gICAgICBpZiAodGV4dGFyZWEucGFyZW50Tm9kZSkge1xuICAgICAgICB0ZXh0YXJlYS5wYXJlbnROb2RlLnJlbW92ZUNoaWxkKHRleHRhcmVhKTtcbiAgICAgIH1cblxuICAgICAgdGhpcy5fdGV4dGFyZWEgPSB1bmRlZmluZWQ7XG4gICAgfVxuICB9XG59XG4iXX0=
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