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