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); }); }