1 | /**
|
2 | * @license
|
3 | * Copyright 2016 Google Inc.
|
4 | *
|
5 | * Permission is hereby granted, free of charge, to any person obtaining a copy
|
6 | * of this software and associated documentation files (the "Software"), to deal
|
7 | * in the Software without restriction, including without limitation the rights
|
8 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
9 | * copies of the Software, and to permit persons to whom the Software is
|
10 | * furnished to do so, subject to the following conditions:
|
11 | *
|
12 | * The above copyright notice and this permission notice shall be included in
|
13 | * all copies or substantial portions of the Software.
|
14 | *
|
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
18 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
21 | * THE SOFTWARE.
|
22 | */
|
23 | export function createFocusTrapInstance(surfaceEl, focusTrapFactory, initialFocusEl) {
|
24 | return focusTrapFactory(surfaceEl, { initialFocusEl: initialFocusEl });
|
25 | }
|
26 | export function isScrollable(el) {
|
27 | return el ? el.scrollHeight > el.offsetHeight : false;
|
28 | }
|
29 | /**
|
30 | * For scrollable content, returns true if the content has not been scrolled
|
31 | * (that is, the scroll content is as the "top"). This is used in full-screen
|
32 | * dialogs, where the scroll divider is expected only to appear once the
|
33 | * content has been scrolled "underneath" the header bar.
|
34 | */
|
35 | export function isScrollAtTop(el) {
|
36 | return el ? el.scrollTop === 0 : false;
|
37 | }
|
38 | /**
|
39 | * For scrollable content, returns true if the content has been scrolled all the
|
40 | * way to the bottom. This is used in full-screen dialogs, where the footer
|
41 | * scroll divider is expected only to appear when the content is "cut-off" by
|
42 | * the footer bar.
|
43 | */
|
44 | export function isScrollAtBottom(el) {
|
45 | return el ? Math.ceil(el.scrollHeight - el.scrollTop) === el.clientHeight :
|
46 | false;
|
47 | }
|
48 | export function areTopsMisaligned(els) {
|
49 | var tops = new Set();
|
50 | [].forEach.call(els, function (el) { return tops.add(el.offsetTop); });
|
51 | return tops.size > 1;
|
52 | }
|
53 | //# sourceMappingURL=util.js.map |
\ | No newline at end of file |