Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 19x 19x 19x 19x 19x 19x 19x 19x 19x 19x 19x 19x 19x 19x 19x 19x 19x 19x 19x 19x 19x 19x 19x 19x 19x 19x 19x 19x 19x | import getCaretPosition from 'textarea-caret';
import { AcceptedInputType } from '../types';
import { getInputSelectionStart } from './input';
export type Point = {
top: number;
left: number;
};
/**
* Everything the dropdown needs to know about the page, measured in viewport coordinates.
*
* @note Facts only. Deciding what to do with them is `getDropdownPosition`.
*/
export type CaretMetrics = {
/**
* Position of the caret, plus the height of the line it sits on
*/
caret: Point & { height: number };
/**
* Visible content box of the input, ie the area the caret can be seen in
*/
box: {
top: number;
bottom: number;
left: number;
right: number;
};
/**
* Origin the dropdown is positioned against, ie the input's offsetParent
*/
origin: Point;
/**
* Size of the visible page
*/
viewport: {
width: number;
height: number;
};
/**
* Whether the input scrolls its own content, ie whether it can hide its own caret
*/
scrollable: boolean;
};
export function getCaretMetrics(input: AcceptedInputType): CaretMetrics {
const caret = getCaretPosition(input, getInputSelectionStart(input));
const box = input.getBoundingClientRect();
return {
// `textarea-caret` measures against the unscrolled content, so remove the element's own scroll
caret: {
top: box.top + caret.top - input.scrollTop,
left: box.left + caret.left - input.scrollLeft,
height: caret.height,
},
// Content is clipped at the padding box, which `clientTop`/`clientLeft` (the border widths) offset to
box: {
top: box.top + input.clientTop,
bottom: box.top + input.clientTop + input.clientHeight,
left: box.left + input.clientLeft,
right: box.left + input.clientLeft + input.clientWidth,
},
origin: {
top: box.top - input.offsetTop,
left: box.left - input.offsetLeft,
},
viewport: {
width: window.innerWidth,
height: window.innerHeight,
},
// An element that is not laid out reports a zero-sized box, which is not the same as one that scrolls
scrollable: input.scrollHeight > input.clientHeight,
};
}
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