From 7cdfe55624c4c04838f738203f632e7b236369c3 Mon Sep 17 00:00:00 2001
From: Michael Schmidt <mitchi5000.ms@googlemail.com>
Date: Sat, 24 Oct 2020 17:54:14 +0200
Subject: [PATCH] Line numbers: Fixed null reference (#2605)

---
 plugins/line-numbers/prism-line-numbers.js     | 3 +++
 plugins/line-numbers/prism-line-numbers.min.js | 2 +-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/plugins/line-numbers/prism-line-numbers.js b/plugins/line-numbers/prism-line-numbers.js
index 16012f604d..1712ed6bd1 100644
--- a/plugins/line-numbers/prism-line-numbers.js
+++ b/plugins/line-numbers/prism-line-numbers.js
@@ -33,6 +33,9 @@
 			}
 
 			var lineNumberRows = element.querySelector('.line-numbers-rows');
+			if (!lineNumberRows) {
+				return;
+			}
 			var lineNumberStart = parseInt(element.getAttribute('data-start'), 10) || 1;
 			var lineNumberEnd = lineNumberStart + (lineNumberRows.children.length - 1);
 
diff --git a/plugins/line-numbers/prism-line-numbers.min.js b/plugins/line-numbers/prism-line-numbers.min.js
index b0ee977c66..adce92854a 100644
--- a/plugins/line-numbers/prism-line-numbers.min.js
+++ b/plugins/line-numbers/prism-line-numbers.min.js
@@ -1 +1 @@
-!function(){if("undefined"!=typeof self&&self.Prism&&self.document){var o="line-numbers",a=/\n(?!$)/g,e=Prism.plugins.lineNumbers={getLine:function(e,n){if("PRE"===e.tagName&&e.classList.contains(o)){var t=e.querySelector(".line-numbers-rows"),i=parseInt(e.getAttribute("data-start"),10)||1,r=i+(t.children.length-1);n<i&&(n=i),r<n&&(n=r);var s=n-i;return t.children[s]}},resize:function(e){u([e])},assumeViewportIndependence:!0},t=function(e){return e?window.getComputedStyle?getComputedStyle(e):e.currentStyle||null:null},n=void 0;window.addEventListener("resize",function(){e.assumeViewportIndependence&&n===window.innerWidth||(n=window.innerWidth,u(Array.prototype.slice.call(document.querySelectorAll("pre."+o))))}),Prism.hooks.add("complete",function(e){if(e.code){var n=e.element,t=n.parentNode;if(t&&/pre/i.test(t.nodeName)&&!n.querySelector(".line-numbers-rows")&&Prism.util.isActive(n,o)){n.classList.remove(o),t.classList.add(o);var i,r=e.code.match(a),s=r?r.length+1:1,l=new Array(s+1).join("<span></span>");(i=document.createElement("span")).setAttribute("aria-hidden","true"),i.className="line-numbers-rows",i.innerHTML=l,t.hasAttribute("data-start")&&(t.style.counterReset="linenumber "+(parseInt(t.getAttribute("data-start"),10)-1)),e.element.appendChild(i),u([t]),Prism.hooks.run("line-numbers",e)}}}),Prism.hooks.add("line-numbers",function(e){e.plugins=e.plugins||{},e.plugins.lineNumbers=!0})}function u(e){if(0!=(e=e.filter(function(e){var n=t(e)["white-space"];return"pre-wrap"===n||"pre-line"===n})).length){var n=e.map(function(e){var n=e.querySelector("code"),t=e.querySelector(".line-numbers-rows");if(n&&t){var i=e.querySelector(".line-numbers-sizer"),r=n.textContent.split(a);i||((i=document.createElement("span")).className="line-numbers-sizer",n.appendChild(i)),i.innerHTML="0",i.style.display="block";var s=i.getBoundingClientRect().height;return i.innerHTML="",{element:e,lines:r,lineHeights:[],oneLinerHeight:s,sizer:i}}}).filter(Boolean);n.forEach(function(e){var i=e.sizer,n=e.lines,r=e.lineHeights,s=e.oneLinerHeight;r[n.length-1]=void 0,n.forEach(function(e,n){if(e&&1<e.length){var t=i.appendChild(document.createElement("span"));t.style.display="block",t.textContent=e}else r[n]=s})}),n.forEach(function(e){for(var n=e.sizer,t=e.lineHeights,i=0,r=0;r<t.length;r++)void 0===t[r]&&(t[r]=n.children[i++].getBoundingClientRect().height)}),n.forEach(function(e){var n=e.sizer,t=e.element.querySelector(".line-numbers-rows");n.style.display="none",n.innerHTML="",e.lineHeights.forEach(function(e,n){t.children[n].style.height=e+"px"})})}}}();
\ No newline at end of file
+!function(){if("undefined"!=typeof self&&self.Prism&&self.document){var o="line-numbers",a=/\n(?!$)/g,e=Prism.plugins.lineNumbers={getLine:function(e,n){if("PRE"===e.tagName&&e.classList.contains(o)){var t=e.querySelector(".line-numbers-rows");if(t){var i=parseInt(e.getAttribute("data-start"),10)||1,r=i+(t.children.length-1);n<i&&(n=i),r<n&&(n=r);var s=n-i;return t.children[s]}}},resize:function(e){u([e])},assumeViewportIndependence:!0},t=function(e){return e?window.getComputedStyle?getComputedStyle(e):e.currentStyle||null:null},n=void 0;window.addEventListener("resize",function(){e.assumeViewportIndependence&&n===window.innerWidth||(n=window.innerWidth,u(Array.prototype.slice.call(document.querySelectorAll("pre."+o))))}),Prism.hooks.add("complete",function(e){if(e.code){var n=e.element,t=n.parentNode;if(t&&/pre/i.test(t.nodeName)&&!n.querySelector(".line-numbers-rows")&&Prism.util.isActive(n,o)){n.classList.remove(o),t.classList.add(o);var i,r=e.code.match(a),s=r?r.length+1:1,l=new Array(s+1).join("<span></span>");(i=document.createElement("span")).setAttribute("aria-hidden","true"),i.className="line-numbers-rows",i.innerHTML=l,t.hasAttribute("data-start")&&(t.style.counterReset="linenumber "+(parseInt(t.getAttribute("data-start"),10)-1)),e.element.appendChild(i),u([t]),Prism.hooks.run("line-numbers",e)}}}),Prism.hooks.add("line-numbers",function(e){e.plugins=e.plugins||{},e.plugins.lineNumbers=!0})}function u(e){if(0!=(e=e.filter(function(e){var n=t(e)["white-space"];return"pre-wrap"===n||"pre-line"===n})).length){var n=e.map(function(e){var n=e.querySelector("code"),t=e.querySelector(".line-numbers-rows");if(n&&t){var i=e.querySelector(".line-numbers-sizer"),r=n.textContent.split(a);i||((i=document.createElement("span")).className="line-numbers-sizer",n.appendChild(i)),i.innerHTML="0",i.style.display="block";var s=i.getBoundingClientRect().height;return i.innerHTML="",{element:e,lines:r,lineHeights:[],oneLinerHeight:s,sizer:i}}}).filter(Boolean);n.forEach(function(e){var i=e.sizer,n=e.lines,r=e.lineHeights,s=e.oneLinerHeight;r[n.length-1]=void 0,n.forEach(function(e,n){if(e&&1<e.length){var t=i.appendChild(document.createElement("span"));t.style.display="block",t.textContent=e}else r[n]=s})}),n.forEach(function(e){for(var n=e.sizer,t=e.lineHeights,i=0,r=0;r<t.length;r++)void 0===t[r]&&(t[r]=n.children[i++].getBoundingClientRect().height)}),n.forEach(function(e){var n=e.sizer,t=e.element.querySelector(".line-numbers-rows");n.style.display="none",n.innerHTML="",e.lineHeights.forEach(function(e,n){t.children[n].style.height=e+"px"})})}}}();
\ No newline at end of file