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import onetime from 'onetime';
import delegate from 'delegate-it';
import * as pageDetect from 'github-url-detection';
import * as textFieldEdit from 'text-field-edit';
import features from '.';
import onCommentFieldKeydown from '../github-events/on-comment-field-keydown';
const formattingCharacters = ['`', '\'', '"', '[', '(', '{', '*', '_', '~'];
const matchingCharacters = ['`', '\'', '"', ']', ')', '}', '*', '_', '~'];
function eventHandler(event: delegate.Event<KeyboardEvent, HTMLTextAreaElement>): void {
const field = event.delegateTarget;
if (!formattingCharacters.includes(event.key)) {
return;
}
const [start, end] = [field.selectionStart, field.selectionEnd];
// If `start` and `end` of selection are the same, then no text is selected
if (start === end) {
return;
}
event.preventDefault();
const formattingChar = event.key;
const matchingEndChar = matchingCharacters[formattingCharacters.indexOf(formattingChar)];
textFieldEdit.wrapSelection(field, formattingChar, matchingEndChar);
}
function init(): void {
onCommentFieldKeydown(eventHandler);
}
void features.add(__filebasename, {
include: [
pageDetect.hasCode
],
awaitDomReady: false,
init: onetime(init)
});
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