From 97a990425827b99dee2b07f24191f8ae04914a5a Mon Sep 17 00:00:00 2001
From: Huang Yong <huangyong@51bmb.com>
Date: Fri, 4 Mar 2016 17:03:44 +0800
Subject: [PATCH] fix issue when elem.lastChild is not defined

---
 clamp.js     |  5 ++++-
 clamp.min.js | 13 +------------
 2 files changed, 5 insertions(+), 13 deletions(-)

diff --git a/clamp.js b/clamp.js
index f13e8ad..d999868 100644
--- a/clamp.js
+++ b/clamp.js
@@ -113,6 +113,9 @@
          * Gets an element's last child. That may be another node or a node's contents.
          */
         function getLastChild(elem) {
+            if (!elem.lastChild) {
+                return;
+            }
             //Current element has children, need to go deeper and get last child as a text node
             if (elem.lastChild.children && elem.lastChild.children.length > 0) {
                 return getLastChild(Array.prototype.slice.call(elem.children).pop());
@@ -133,7 +136,7 @@
          * height is beneath the passed-in max param.
          */
         function truncate(target, maxHeight) {
-            if (!maxHeight) {return;}
+            if (!target || !maxHeight) {return;}
             
             /**
              * Resets global variables.
diff --git a/clamp.min.js b/clamp.min.js
index 2d8783a..d310e9d 100644
--- a/clamp.min.js
+++ b/clamp.min.js
@@ -1,12 +1 @@
-/*!
-* Clamp.js 0.5.1
-*
-* Copyright 2011-2013, Joseph Schmitt http://joe.sh
-* Released under the WTFPL license
-* http://sam.zoy.org/wtfpl/
-*/
-(function(){window.$clamp=function(c,d){function s(a,b){n.getComputedStyle||(n.getComputedStyle=function(a,b){this.el=a;this.getPropertyValue=function(b){var c=/(\-([a-z]){1})/g;"float"==b&&(b="styleFloat");c.test(b)&&(b=b.replace(c,function(a,b,c){return c.toUpperCase()}));return a.currentStyle&&a.currentStyle[b]?a.currentStyle[b]:null};return this});return n.getComputedStyle(a,null).getPropertyValue(b)}function t(a){a=a||c.clientHeight;var b=u(c);return Math.max(Math.floor(a/b),0)}function x(a){return u(c)*
-a}function u(a){var b=s(a,"line-height");"normal"==b&&(b=1.2*parseInt(s(a,"font-size")));return parseInt(b)}function l(a){if(a.lastChild.children&&0<a.lastChild.children.length)return l(Array.prototype.slice.call(a.children).pop());if(a.lastChild&&a.lastChild.nodeValue&&""!=a.lastChild.nodeValue&&a.lastChild.nodeValue!=b.truncationChar)return a.lastChild;a.lastChild.parentNode.removeChild(a.lastChild);return l(c)}function p(a,d){if(d){var e=a.nodeValue.replace(b.truncationChar,"");f||(h=0<k.length?
-k.shift():"",f=e.split(h));1<f.length?(q=f.pop(),r(a,f.join(h))):f=null;m&&(a.nodeValue=a.nodeValue.replace(b.truncationChar,""),c.innerHTML=a.nodeValue+" "+m.innerHTML+b.truncationChar);if(f){if(c.clientHeight<=d)if(0<=k.length&&""!=h)r(a,f.join(h)+h+q),f=null;else return c.innerHTML}else""==h&&(r(a,""),a=l(c),k=b.splitOnChars.slice(0),h=k[0],q=f=null);if(b.animate)setTimeout(function(){p(a,d)},!0===b.animate?10:b.animate);else return p(a,d)}}function r(a,c){a.nodeValue=c+b.truncationChar}d=d||{};
-var n=window,b={clamp:d.clamp||2,useNativeClamp:"undefined"!=typeof d.useNativeClamp?d.useNativeClamp:!0,splitOnChars:d.splitOnChars||[".","-","\u2013","\u2014"," "],animate:d.animate||!1,truncationChar:d.truncationChar||"\u2026",truncationHTML:d.truncationHTML},e=c.style,y=c.innerHTML,z="undefined"!=typeof c.style.webkitLineClamp,g=b.clamp,v=g.indexOf&&(-1<g.indexOf("px")||-1<g.indexOf("em")),m;b.truncationHTML&&(m=document.createElement("span"),m.innerHTML=b.truncationHTML);var k=b.splitOnChars.slice(0),
-h=k[0],f,q;"auto"==g?g=t():v&&(g=t(parseInt(g)));var w;z&&b.useNativeClamp?(e.overflow="hidden",e.textOverflow="ellipsis",e.webkitBoxOrient="vertical",e.display="-webkit-box",e.webkitLineClamp=g,v&&(e.height=b.clamp+"px")):(e=x(g),e<=c.clientHeight&&(w=p(l(c),e)));return{original:y,clamped:w}}})();
\ No newline at end of file
+!function(){function e(e,t){function n(e,t){return s.getComputedStyle||(s.getComputedStyle=function(e,t){return this.el=e,this.getPropertyValue=function(t){var n=/(\-([a-z]){1})/g;return"float"==t&&(t="styleFloat"),n.test(t)&&(t=t.replace(n,function(){return arguments[2].toUpperCase()})),e.currentStyle&&e.currentStyle[t]?e.currentStyle[t]:null},this}),s.getComputedStyle(e,null).getPropertyValue(t)}function i(t){var n=t||e.clientHeight,i=a(e);return Math.max(Math.floor(n/i),0)}function l(t){var n=a(e);return n*t}function a(e){var t=n(e,"line-height");return"normal"==t&&(t=1.2*parseInt(n(e,"font-size"))),parseInt(t)}function r(t){return t.lastChild?t.lastChild.children&&t.lastChild.children.length>0?r(Array.prototype.slice.call(t.children).pop()):t.lastChild&&t.lastChild.nodeValue&&""!=t.lastChild.nodeValue&&t.lastChild.nodeValue!=p.truncationChar?t.lastChild:(t.lastChild.parentNode.removeChild(t.lastChild),r(e)):void 0}function o(t,n){function i(){y=p.splitOnChars.slice(0),H=y[0],v=null,g=null}if(t&&n){var l=t.nodeValue.replace(p.truncationChar,"");if(v||(H=y.length>0?y.shift():"",v=l.split(H)),v.length>1?(g=v.pop(),u(t,v.join(H))):v=null,c&&(t.nodeValue=t.nodeValue.replace(p.truncationChar,""),e.innerHTML=t.nodeValue+" "+c.innerHTML+p.truncationChar),v){if(e.clientHeight<=n){if(!(y.length>=0&&""!=H))return e.innerHTML;u(t,v.join(H)+H+g),v=null}}else""==H&&(u(t,""),t=r(e),i());return p.animate?void setTimeout(function(){o(t,n)},p.animate===!0?10:p.animate):o(t,n)}}function u(e,t){e.nodeValue=t+p.truncationChar}t=t||{};var c,s=window,p={clamp:t.clamp||2,useNativeClamp:"undefined"!=typeof t.useNativeClamp?t.useNativeClamp:!0,splitOnChars:t.splitOnChars||[".","-","–","—"," "],animate:t.animate||!1,truncationChar:t.truncationChar||"…",truncationHTML:t.truncationHTML},h=e.style,d=e.innerHTML,f="undefined"!=typeof e.style.webkitLineClamp,C=p.clamp,m=C.indexOf&&(C.indexOf("px")>-1||C.indexOf("em")>-1);p.truncationHTML&&(c=document.createElement("span"),c.innerHTML=p.truncationHTML);var v,g,y=p.splitOnChars.slice(0),H=y[0];"auto"==C?C=i():m&&(C=i(parseInt(C)));var L;if(f&&p.useNativeClamp)h.overflow="hidden",h.textOverflow="ellipsis",h.webkitBoxOrient="vertical",h.display="-webkit-box",h.webkitLineClamp=C,m&&(h.height=p.clamp+"px");else{var M=l(C);M<=e.clientHeight&&(L=o(r(e),M))}return{original:d,clamped:L}}window.$clamp=e}();