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title: $:/plugins/local/copy-codeblock/copy-codeblock.js
type: application/javascript
module-type: widget
/*\
title: $:/plugins/local/copy-codeblock/copy-codeblock.js
type: application/javascript
module-type: widget
Adds a copy button to code blocks.
\*/
(function() {
"use strict";
var CodeBlockWidget = require("$:/core/modules/widgets/codeblock.js").codeblock;
var CopyCodeBlockWidget = function(parseTreeNode,options) {
this.initialise(parseTreeNode,options);
};
CopyCodeBlockWidget.prototype = new CodeBlockWidget();
CopyCodeBlockWidget.prototype.constructor = CopyCodeBlockWidget;
CopyCodeBlockWidget.prototype.postRender = function() {
var self = this,
preNode = this.domNodes[0],
previousNode,
button;
// Preserve syntax highlighting supplied by the highlight plugin.
if(CodeBlockWidget.prototype.postRender) {
CodeBlockWidget.prototype.postRender.call(this);
}
if(!$tw.browser || !preNode || preNode.isTiddlyWikiFakeDom) {
return;
}
// The system code view already renders its own copy button.
previousNode = preNode.previousElementSibling;
if(previousNode && previousNode.querySelector && previousNode.querySelector(".tc-image-copy-clipboard")) {
return;
}
preNode.style.position = "relative";
preNode.style.paddingRight = "5em";
button = this.document.createElement("button");
button.setAttribute("type","button");
button.setAttribute("aria-label","Copy code");
button.setAttribute("title","Copy code");
button.className = "tc-btn-invisible tc-copy-codeblock-button";
button.textContent = "Copy";
button.style.position = "absolute";
button.style.top = "0.5em";
button.style.right = "0.5em";
button.style.zIndex = "1";
button.style.padding = "0.2em 0.45em";
button.style.cursor = "pointer";
button.addEventListener("click",function(event) {
event.preventDefault();
event.stopPropagation();
$tw.utils.copyToClipboard(self.getAttribute("code",""));
});
preNode.appendChild(button);
};
exports.codeblock = CopyCodeBlockWidget;
})();
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