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(function(){
if (typeof self === 'undefined' || !self.Prism || !self.document) {
return;
}
var callbacks = [];
var map = {};
var noop = function() {};
Prism.plugins.toolbar = {};
/**
* Register a button callback with the toolbar.
*
* @param {string} key
* @param {Object|Function} opts
*/
var registerButton = Prism.plugins.toolbar.registerButton = function (key, opts) {
var callback;
if (typeof opts === 'function') {
callback = opts;
} else {
callback = function (env) {
var element;
if (typeof opts.onClick === 'function') {
element = document.createElement('button');
element.type = 'button';
element.addEventListener('click', function () {
opts.onClick.call(this, env);
});
} else if (typeof opts.url === 'string') {
element = document.createElement('a');
element.href = opts.url;
} else {
element = document.createElement('span');
}
element.textContent = opts.text;
return element;
};
}
callbacks.push(map[key] = callback);
};
/**
* Post-highlight Prism hook callback.
*
* @param env
*/
var hook = Prism.plugins.toolbar.hook = function (env) {
// Check if inline or actual code block (credit to line-numbers plugin)
var pre = env.element.parentNode;
if (!pre || !/pre/i.test(pre.nodeName)) {
return;
}
// Autoloader rehighlights, so only do this once.
if (pre.parentNode.classList.contains('code-toolbar')) {
return;
}
// Create wrapper for <pre> to prevent scrolling toolbar with content
var wrapper = document.createElement("div");
wrapper.classList.add("code-toolbar");
pre.parentNode.insertBefore(wrapper, pre);
wrapper.appendChild(pre);
// Setup the toolbar
var toolbar = document.createElement('div');
toolbar.classList.add('toolbar');
if (document.body.hasAttribute('data-toolbar-order')) {
callbacks = document.body.getAttribute('data-toolbar-order').split(',').map(function(key) {
return map[key] || noop;
});
}
callbacks.forEach(function(callback) {
var element = callback(env);
if (!element) {
return;
}
var item = document.createElement('div');
item.classList.add('toolbar-item');
item.appendChild(element);
toolbar.appendChild(item);
});
// Add our toolbar to the currently created wrapper of <pre> tag
wrapper.appendChild(toolbar);
};
registerButton('label', function(env) {
var pre = env.element.parentNode;
if (!pre || !/pre/i.test(pre.nodeName)) {
return;
}
if (!pre.hasAttribute('data-label')) {
return;
}
var element, template;
var text = pre.getAttribute('data-label');
try {
// Any normal text will blow up this selector.
template = document.querySelector('template#' + text);
} catch (e) {}
if (template) {
element = template.content;
} else {
if (pre.hasAttribute('data-url')) {
element = document.createElement('a');
element.href = pre.getAttribute('data-url');
} else {
element = document.createElement('span');
}
element.textContent = text;
}
return element;
});
/**
* Register the toolbar with Prism.
*/
Prism.hooks.add('complete', hook);
})();
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