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import $ from 'jquery';
import Clipboard from 'clipboard';
function showTooltip(target, title) {
const $target = $(target);
const originalTitle = $target.data('originalTitle');
if (!$target.data('hideTooltip')) {
$target
.attr('title', title)
.tooltip('_fixTitle')
.tooltip('show')
.attr('title', originalTitle)
.tooltip('_fixTitle');
}
}
function genericSuccess(e) {
showTooltip(e.trigger, 'Copied');
// Clear the selection and blur the trigger so it loses its border
e.clearSelection();
$(e.trigger).blur();
}
/**
* Safari > 10 doesn't support `execCommand`, so instead we inform the user to copy manually.
* See http://clipboardjs.com/#browser-support
*/
function genericError(e) {
let key;
if (/Mac/i.test(navigator.userAgent)) {
key = '⌘'; // Command
} else {
key = 'Ctrl';
}
showTooltip(e.trigger, `Press ${key}-C to copy`);
}
export default function initCopyToClipboard() {
const clipboard = new Clipboard('[data-clipboard-target], [data-clipboard-text]');
clipboard.on('success', genericSuccess);
clipboard.on('error', genericError);
/**
* This a workaround around ClipboardJS limitations to allow the context-specific copy/pasting
* of plain text or GFM. The Ruby `clipboard_button` helper sneaks a JSON hash with `text` and
* `gfm` keys into the `data-clipboard-text` attribute that ClipboardJS reads from.
* When ClipboardJS creates a new `textarea` (directly inside `body`, with a `readonly`
* attribute`), sets its value to the value of this data attribute, focusses on it, and finally
* programmatically issues the 'Copy' command, this code intercepts the copy command/event at
* the last minute to deconstruct this JSON hash and set the `text/plain` and `text/x-gfm` copy
* data types to the intended values.
*/
$(document).on('copy', 'body > textarea[readonly]', e => {
const { clipboardData } = e.originalEvent;
if (!clipboardData) return;
const text = e.target.value;
let json;
try {
json = JSON.parse(text);
} catch (ex) {
return;
}
if (!json.text || !json.gfm) return;
e.preventDefault();
clipboardData.setData('text/plain', json.text);
clipboardData.setData('text/x-gfm', json.gfm);
});
}
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