Hash :
fd20dbe4
Author :
Date :
2021-05-01T14:53:38
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(function () {
if (typeof Prism === 'undefined' || typeof document === 'undefined') {
return;
}
if (!Prism.plugins.toolbar) {
console.warn('Copy to Clipboard plugin loaded before Toolbar plugin.');
return;
}
/**
* When the given elements is clicked by the user, the given text will be copied to clipboard.
*
* @param {HTMLElement} element
* @param {CopyInfo} copyInfo
*
* @typedef CopyInfo
* @property {() => string} getText
* @property {() => void} success
* @property {(reason: unknown) => void} error
*/
function registerClipboard(element, copyInfo) {
element.addEventListener('click', function () {
copyTextToClipboard(copyInfo);
});
}
// https://stackoverflow.com/a/30810322/7595472
/** @param {CopyInfo} copyInfo */
function fallbackCopyTextToClipboard(copyInfo) {
var textArea = document.createElement('textarea');
textArea.value = copyInfo.getText();
// Avoid scrolling to bottom
textArea.style.top = '0';
textArea.style.left = '0';
textArea.style.position = 'fixed';
document.body.appendChild(textArea);
textArea.focus();
textArea.select();
try {
var successful = document.execCommand('copy');
setTimeout(function () {
if (successful) {
copyInfo.success();
} else {
copyInfo.error();
}
}, 1);
} catch (err) {
setTimeout(function () {
copyInfo.error(err);
}, 1);
}
document.body.removeChild(textArea);
}
/** @param {CopyInfo} copyInfo */
function copyTextToClipboard(copyInfo) {
if (navigator.clipboard) {
navigator.clipboard.writeText(copyInfo.getText()).then(copyInfo.success, function () {
// try the fallback in case `writeText` didn't work
fallbackCopyTextToClipboard(copyInfo);
});
} else {
fallbackCopyTextToClipboard(copyInfo);
}
}
/**
* Selects the text content of the given element.
*
* @param {Element} element
*/
function selectElementText(element) {
// https://stackoverflow.com/a/20079910/7595472
window.getSelection().selectAllChildren(element);
}
/**
* Traverses up the DOM tree to find data attributes that override the default plugin settings.
*
* @param {Element} startElement An element to start from.
* @returns {Settings} The plugin settings.
* @typedef {Record<"copy" | "copy-error" | "copy-success" | "copy-timeout", string | number>} Settings
*/
function getSettings(startElement) {
/** @type {Settings} */
var settings = {
'copy': 'Copy',
'copy-error': 'Press Ctrl+C to copy',
'copy-success': 'Copied!',
'copy-timeout': 5000
};
var prefix = 'data-prismjs-';
for (var key in settings) {
var attr = prefix + key;
var element = startElement;
while (element && !element.hasAttribute(attr)) {
element = element.parentElement;
}
if (element) {
settings[key] = element.getAttribute(attr);
}
}
return settings;
}
Prism.plugins.toolbar.registerButton('copy-to-clipboard', function (env) {
var element = env.element;
var settings = getSettings(element);
var linkCopy = document.createElement('button');
linkCopy.className = 'copy-to-clipboard-button';
linkCopy.setAttribute('type', 'button');
var linkSpan = document.createElement('span');
linkCopy.appendChild(linkSpan);
setState('copy');
registerClipboard(linkCopy, {
getText: function () {
return element.textContent;
},
success: function () {
setState('copy-success');
resetText();
},
error: function () {
setState('copy-error');
setTimeout(function () {
selectElementText(element);
}, 1);
resetText();
}
});
return linkCopy;
function resetText() {
setTimeout(function () { setState('copy'); }, settings['copy-timeout']);
}
/** @param {"copy" | "copy-error" | "copy-success"} state */
function setState(state) {
linkSpan.textContent = settings[state];
linkCopy.setAttribute('data-copy-state', state);
}
});
}());