diff options
Diffstat (limited to 'app/assets/javascripts/behaviors/copy_to_clipboard.js')
-rw-r--r-- | app/assets/javascripts/behaviors/copy_to_clipboard.js | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/app/assets/javascripts/behaviors/copy_to_clipboard.js b/app/assets/javascripts/behaviors/copy_to_clipboard.js new file mode 100644 index 00000000000..cdea625fc8c --- /dev/null +++ b/app/assets/javascripts/behaviors/copy_to_clipboard.js @@ -0,0 +1,73 @@ +import Clipboard from 'clipboard'; + +function showTooltip(target, title) { + const $target = $(target); + const originalTitle = $target.data('original-title'); + + if (!$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.clipboardData; + 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); + }); +} |