From 7fc3ab55c384c273390c7fb34fa6a78870f61ee7 Mon Sep 17 00:00:00 2001
From: Neil Jenkins <neil@nmjenkins.com>
Date: Fri, 19 Jun 2015 10:56:52 +0700
Subject: [PATCH] Better cleanTree fn.

- Better checks to precisely trim white space only at beginning and end of block
- Don't keep the contents of <head> or <style> tags if inserted into body.
- Always keep styles to preserve fidelity on paste.

Fixes #95.
---
 build/squire-raw.js | 84 ++++++++++++++++++++++-----------------------
 build/squire.js     |  4 +--
 source/Clean.js     | 80 +++++++++++++++++++++---------------------
 source/Editor.js    |  4 +--
 4 files changed, 84 insertions(+), 88 deletions(-)
diff --git a/build/squire-raw.js b/build/squire-raw.js
index 6d50202..2f84ee9 100644
--- a/build/squire-raw.js
+++ b/build/squire-raw.js
@@ -1720,10 +1720,20 @@ var stylesRewriters = {
        and whitespace nodes.
     2. Convert inline tags into our preferred format.
 */
-var cleanTree = function ( node, allowStyles ) {
+var cleanTree = function cleanTree ( node ) {
     var children = node.childNodes,
-        i, l, child, nodeName, nodeType, rewriter, childLength,
-        data, j, ll;
+        blockParent, i, l, child, nodeName, nodeType, rewriter, childLength,
+        startsWithWS, endsWithWS, data;
+
+    blockParent = node;
+    while ( isInline( blockParent ) ) {
+        blockParent = blockParent.parentNode;
+    }
+    if ( !isBlock( blockParent ) ) {
+        blockParent = null;
+    }
+    contentWalker.root = blockParent;
+
     for ( i = 0, l = children.length; i < l; i += 1 ) {
         child = children[i];
         nodeName = child.nodeName;
@@ -1736,55 +1746,43 @@ var cleanTree = function ( node, allowStyles ) {
             } else if ( !allowedBlock.test( nodeName ) &&
                     !isInline( child ) ) {
                 i -= 1;
-                l += childLength - 1;
-                node.replaceChild( empty( child ), child );
+                if ( nodeName === 'HEAD' || nodeName === 'STYLE' ) {
+                    node.removeChild( child );
+                    l -= 1;
+                } else {
+                    l += childLength - 1;
+                    node.replaceChild( empty( child ), child );
+                }
                 continue;
-            } else if ( !allowStyles && child.style.cssText ) {
-                child.removeAttribute( 'style' );
             }
             if ( childLength ) {
-                cleanTree( child, allowStyles );
+                cleanTree( child );
             }
         } else {
             if ( nodeType === TEXT_NODE ) {
                 data = child.data;
-                // Use \S instead of notWS, because we want to remove nodes
+                // Use \s instead of notWS, because we want to remove nodes
                 // which are just nbsp, in order to cleanup <div>nbsp<br></div>
                 // construct.
-                if ( /\S/.test( data ) ) {
-                    // If the parent node is inline, don't trim this node as
-                    // it probably isn't at the end of the block.
-                    if ( isInline( node ) ) {
-                        continue;
-                    }
-                    j = 0;
-                    ll = data.length;
-                    if ( !i || !isInline( children[ i - 1 ] ) ) {
-                        while ( j < ll && !notWS.test( data.charAt( j ) ) ) {
-                            j += 1;
-                        }
-                        if ( j ) {
-                            child.data = data = data.slice( j );
-                            ll -= j;
-                        }
-                    }
-                    if ( i + 1 === l || !isInline( children[ i + 1 ] ) ) {
-                        j = ll;
-                        while ( j > 0 && !notWS.test( data.charAt( j - 1 ) ) ) {
-                            j -= 1;
-                        }
-                        if ( j < ll ) {
-                            child.data = data.slice( 0, j );
-                        }
-                    }
+                startsWithWS = /\s/.test( data.charAt( 0 ) );
+                endsWithWS = /\s/.test( data.charAt( data.length - 1 ) );
+                if ( !startsWithWS && !endsWithWS ) {
                     continue;
                 }
-                // If we have just white space, it may still be important if it
-                // separates two inline nodes, e.g. "<a>link</a> <a>link</a>".
-                else if ( i && i + 1 < l &&
-                        isInline( children[ i - 1 ] ) &&
-                        isInline( children[ i + 1 ] ) ) {
-                    child.data = ' ';
+                if ( startsWithWS ) {
+                    contentWalker.currentNode = child;
+                    if ( !blockParent || !contentWalker.previousNode() ) {
+                        data = data.replace( /^\s+/g, '' );
+                    }
+                }
+                if ( endsWithWS ) {
+                    contentWalker.currentNode = child;
+                    if ( !blockParent || !contentWalker.nextNode() ) {
+                        data = data.replace( /\s+$/g, '' );
+                    }
+                }
+                if ( data ) {
+                    child.data = data;
                     continue;
                 }
             }
@@ -3319,7 +3317,7 @@ proto.setHTML = function ( html ) {
     div.innerHTML = html;
     frag.appendChild( empty( div ) );
 
-    cleanTree( frag, true );
+    cleanTree( frag );
     cleanupBRs( frag );
 
     fixContainer( frag );
@@ -3473,7 +3471,7 @@ proto.insertHTML = function ( html, isPaste ) {
         };
 
         addLinks( frag );
-        cleanTree( frag, true );
+        cleanTree( frag );
         cleanupBRs( frag );
         removeEmptyInlines( frag );
         frag.normalize();
diff --git a/build/squire.js b/build/squire.js
index c9e0ad1..f7a3c88 100644
--- a/build/squire.js
+++ b/build/squire.js
@@ -1,2 +1,2 @@
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this},Ft.hasFormat=function(e,t,r){if(e=e.toUpperCase(),t||(t={}),!r&&!(r=this.getSelection()))return!1;var o,i,a=r.commonAncestorContainer;if(u(a,e,t))return!0;if(a.nodeType===R)return!1;o=new n(a,U,function(e){return ct(r,e,!0)},!1);for(var s=!1;i=o.nextNode();){if(!u(i,e,t))return!1;s=!0}return s},Ft._addFormat=function(e,t,r){var o,i,a,s,d,l,c,h;if(r.collapsed)o=S(this.createElement(e,t)),at(r,o),r.setStart(o.firstChild,o.firstChild.length),r.collapse(!0);else{if(i=new n(r.commonAncestorContainer,U|D,function(e){return(e.nodeType===R||"BR"===e.nodeName)&&ct(r,e,!0)},!1),a=r.startContainer,d=r.startOffset,s=r.endContainer,l=r.endOffset,i.currentNode=a,i.filter(a)||(a=i.nextNode(),d=0),!a)return r;do c=i.currentNode,h=!u(c,e,t),h&&(c===s&&c.length>l&&c.splitText(l),c===a&&d&&(c=c.splitText(d),s===a&&(s=c,l-=d),a=c,d=0),o=this.createElement(e,t),v(c,o),o.appendChild(c));while(i.nextNode());s.nodeType!==R&&(c.nodeType===R?(s=c,l=c.length):(s=c.parentNode,l=1)),r=this._createRange(a,d,s,l)}return r},Ft._removeFormat=function(e,t,n,r){this._saveRangeToBookmark(n);var i,a=this._doc;n.collapsed&&($?(i=a.createTextNode(H),this._didAddZWS()):i=a.createTextNode(""),at(n,i));for(var d=n.commonAncestorContainer;s(d);)d=d.parentNode;var l=n.startContainer,c=n.startOffset,h=n.endContainer,f=n.endOffset,u=[],p=function(e,t){if(!ct(n,e,!1)){var r,o,i=e.nodeType===R;if(!ct(n,e,!0))return void("INPUT"===e.nodeName||i&&!e.data||u.push([t,e]));if(i)e===h&&f!==e.length&&u.push([t,e.splitText(f)]),e===l&&c&&(e.splitText(c),u.push([t,e]));else for(r=e.firstChild;r;r=o)o=r.nextSibling,p(r,t)}},g=Array.prototype.filter.call(d.getElementsByTagName(e),function(r){return ct(n,r,!0)&&o(r,e,t)});r||g.forEach(function(e){p(e,e)}),u.forEach(function(e){var t=e[0].cloneNode(!1),n=e[1];v(n,t),t.appendChild(n)}),g.forEach(function(e){v(e,C(e))}),this._getRangeAndRemoveBookmark(n),i&&n.collapse(!1);var m={startContainer:n.startContainer,startOffset:n.startOffset,endContainer:n.endContainer,endOffset:n.endOffset};return T(d,m),n.setStart(m.startContainer,m.startOffset),n.setEnd(m.endContainer,m.endOffset),n},Ft.changeFormat=function(e,t,n,r){return n||(n=this.getSelection())?(this._recordUndoState(n),this._getRangeAndRemoveBookmark(n),t&&(n=this._removeFormat(t.tag.toUpperCase(),t.attributes||{},n,r)),e&&(n=this._addFormat(e.tag.toUpperCase(),e.attributes||{},n)),this.setSelection(n),this._updatePath(n,!0),X||this._docWasChanged(),this):void 0};var zt={DT:"DD",DD:"DT",LI:"LI"},Zt=function(e,t,n,r){var i=zt[t.nodeName],a=null,s=y(n,r,t.parentNode),d=e._config;return i||(i=d.blockTag,a=d.blockAttributes),o(s,i,a)||(t=N(s.ownerDocument,i,a),s.dir&&(t.dir=s.dir),v(s,t),t.appendChild(C(s)),s=t),s};Ft.forEachBlock=function(e,t,n){if(!n&&!(n=this.getSelection()))return this;t&&(this._recordUndoState(n),this._getRangeAndRemoveBookmark(n));var r=ut(n),o=pt(n);if(r&&o)do if(e(r)||r===o)break;while(r=f(r));return t&&(this.setSelection(n),this._updatePath(n,!0),X||this._docWasChanged()),this},Ft.modifyBlocks=function(e,t){if(!t&&!(t=this.getSelection()))return this;this._isInUndoState?this._saveRangeToBookmark(t):this._recordUndoState(t),Ct(t);var n,r=this._body;return ft(t,r),n=st(t,r),at(t,e.call(this,n)),t.endOffset<t.endContainer.childNodes.length&&E(t.endContainer.childNodes[t.endOffset]),E(t.startContainer.childNodes[t.startOffset]),this._getRangeAndRemoveBookmark(t),this.setSelection(t),this._updatePath(t,!0),X||this._docWasChanged(),this};var qt=function(e){return this.createElement("BLOCKQUOTE",this._config.tagAttributes.blockquote,[e])},Vt=function(e){var t=e.querySelectorAll("blockquote");return Array.prototype.filter.call(t,function(e){return!u(e.parentNode,"BLOCKQUOTE")}).forEach(function(e){v(e,C(e))}),e},jt=function(){return this.createDefaultBlock([this.createElement("INPUT",{id:Wt,type:"hidden"}),this.createElement("INPUT",{id:Kt,type:"hidden"})])},Qt=function(e,t,n){for(var r,o,i,a,s=c(t),d=e._config.tagAttributes,l=d[n.toLowerCase()],h=d.li;r=s.nextNode();)o=r.parentNode.nodeName,"LI"!==o?(a=e.createElement("LI",h),r.dir&&(a.dir=r.dir),(i=r.previousSibling)&&i.nodeName===n?i.appendChild(a):v(r,e.createElement(n,l,[a])),a.appendChild(r)):(r=r.parentNode.parentNode,o=r.nodeName,o!==n&&/^[OU]L$/.test(o)&&v(r,e.createElement(n,l,[C(r)])))},Gt=function(e){return Qt(this,e,"UL"),e},$t=function(e){return Qt(this,e,"OL"),e},Yt=function(e){var t,n,r,o,i,a,s,d=e.querySelectorAll("UL, OL");for(t=0,n=d.length;n>t;t+=1){for(o=d[t],i=C(o),a=i.childNodes,r=a.length;r--;)s=a[r],v(s,C(s));_(i),v(o,i)}return e},Xt=function(e){var t,n,r,o,i,a,s=e.querySelectorAll("LI"),d=this._config.tagAttributes,c=d.li;for(t=0,n=s.length;n>t;t+=1)r=s[t],l(r.firstChild)||(o=r.parentNode.nodeName,i=r.previousSibling,i&&(i=i.lastChild)&&i.nodeName===o||(a=d[o.toLowerCase()],v(r,this.createElement("LI",c,[i=this.createElement(o,a)]))),i.appendChild(r));return e},Jt=function(e){var t=e.querySelectorAll("LI");return Array.prototype.filter.call(t,function(e){return!l(e.firstChild)}).forEach(function(t){var n,r=t.parentNode,o=r.parentNode,i=t.firstChild,a=i;for(t.previousSibling&&(r=y(r,t,o));a&&(n=a.nextSibling,!l(a));)o.insertBefore(a,r),a=n;for("LI"===o.nodeName&&i.previousSibling&&y(o,i,o.parentNode);t!==e&&!t.childNodes.length;)r=t.parentNode,r.removeChild(t),t=r},this),_(e),e};Ft._ensureBottomLine=function(){var e=this._body,t=e.lastElementChild;t&&t.nodeName===this._config.blockTag&&d(t)||e.appendChild(this.createDefaultBlock())
+},Ft.setKeyHandler=function(e,t){return this._keyHandlers[e]=t,this},Ft._getHTML=function(){return this._body.innerHTML},Ft._setHTML=function(e){var t=this._body;t.innerHTML=e;do S(t);while(t=f(t));this._ignoreChange=!0},Ft.getHTML=function(e){var t,n,r,o,i,a=[];if(e&&(i=this.getSelection())&&this._saveRangeToBookmark(i),G)for(t=this._body;t=f(t);)t.textContent||t.querySelector("BR")||(n=this.createElement("BR"),t.appendChild(n),a.push(n));if(r=this._getHTML().replace(/\u200B/g,""),G)for(o=a.length;o--;)m(a[o]);return i&&this._getRangeAndRemoveBookmark(i),r},Ft.setHTML=function(e){var t,n=this._doc.createDocumentFragment(),r=this.createElement("DIV");r.innerHTML=e,n.appendChild(C(r)),At(n),Ut(n),_(n);for(var o=n;o=f(o);)S(o);this._ignoreChange=!0;for(var i=this._body;t=i.lastChild;)i.removeChild(t);i.appendChild(n),S(i),this._undoIndex=-1,this._undoStack.length=0,this._undoStackLength=0,this._isInUndoState=!1;var a=this._getRangeAndRemoveBookmark()||this._createRange(i.firstChild,0);return this._recordUndoState(a),this._getRangeAndRemoveBookmark(a),Y?this._lastSelection=a:this.setSelection(a),this._updatePath(a,!0),this},Ft.insertElement=function(e,t){if(t||(t=this.getSelection()),t.collapse(!0),s(e))at(t,e),t.setStartAfter(e);else{for(var n,r,o=this._body,i=ut(t)||o;i!==o&&!i.nextSibling;)i=i.parentNode;i!==o&&(n=i.parentNode,r=y(n,i.nextSibling,o)),r?o.insertBefore(e,r):(o.appendChild(e),r=this.createDefaultBlock(),o.appendChild(r)),t.setStart(r,0),t.setEnd(r,0),ht(t)}return this.focus(),this.setSelection(t),this._updatePath(t),this},Ft.insertImage=function(e,t){var n=this.createElement("IMG",B({src:e},t));return this.insertElement(n),n};var en=/\b((?:(?:ht|f)tps?:\/\/|www\d{0,3}[.]|[a-z0-9.\-]+[.][a-z]{2,}\/)(?:[^\s()<>]+|\([^\s()<>]+\))+(?:\((?:[^\s()<>]+|(?:\([^\s()<>]+\)))*\)|[^\s`!()\[\]{};:'".,<>?«»“”‘’]))|([\w\-.%+]+@(?:[\w\-]+\.)+[A-Z]{2,}\b)/i,tn=function(e){for(var t,r,o,i,a,s,d,l=e.ownerDocument,c=new n(e,U,function(e){return!u(e,"A")},!1);t=c.nextNode();)for(r=t.data,o=t.parentNode;i=en.exec(r);)a=i.index,s=a+i[0].length,a&&(d=l.createTextNode(r.slice(0,a)),o.insertBefore(d,t)),d=l.createElement("A"),d.textContent=r.slice(a,s),d.href=i[1]?/^(?:ht|f)tps?:/.test(i[1])?i[1]:"http://"+i[1]:"mailto:"+i[2],o.insertBefore(d,t),t.data=r=r.slice(s)};Ft.insertHTML=function(e,t){var n=this.getSelection(),r=this._doc.createDocumentFragment(),o=this.createElement("DIV");o.innerHTML=e,r.appendChild(C(o)),this._recordUndoState(n),this._getRangeAndRemoveBookmark(n);try{var i=r,a={fragment:r,preventDefault:function(){this.defaultPrevented=!0},defaultPrevented:!1};for(tn(r),At(r),Ut(r),xt(r),r.normalize();i=f(i);)S(i);t&&this.fireEvent("willPaste",a),a.defaultPrevented||(lt(n,a.fragment),X||this._docWasChanged(),n.collapse(!1),this._ensureBottomLine()),this.setSelection(n),this._updatePath(n,!0)}catch(s){this.didError(s)}return this},Ft.insertPlainText=function(e,t){var n,r,o=e.split("\n");for(n=1,r=o.length-1;r>n;n+=1)o[n]="<DIV>"+o[n].split("&").join("&amp;").split("<").join("&lt;").split(">").join("&gt;").replace(/ (?= )/g,"&nbsp;")+"</DIV>";return this.insertHTML(o.join(""),t)};var nn=function(e,t,n){return function(){return this[e](t,n),this.focus()}};Ft.addStyles=function(e){if(e){var t=this._doc.documentElement.firstChild,n=this.createElement("STYLE",{type:"text/css"});n.appendChild(this._doc.createTextNode(e)),t.appendChild(n)}return this},Ft.bold=nn("changeFormat",{tag:"B"}),Ft.italic=nn("changeFormat",{tag:"I"}),Ft.underline=nn("changeFormat",{tag:"U"}),Ft.strikethrough=nn("changeFormat",{tag:"S"}),Ft.subscript=nn("changeFormat",{tag:"SUB"},{tag:"SUP"}),Ft.superscript=nn("changeFormat",{tag:"SUP"},{tag:"SUB"}),Ft.removeBold=nn("changeFormat",null,{tag:"B"}),Ft.removeItalic=nn("changeFormat",null,{tag:"I"}),Ft.removeUnderline=nn("changeFormat",null,{tag:"U"}),Ft.removeStrikethrough=nn("changeFormat",null,{tag:"S"}),Ft.removeSubscript=nn("changeFormat",null,{tag:"SUB"}),Ft.removeSuperscript=nn("changeFormat",null,{tag:"SUP"}),Ft.makeLink=function(e,t){var n=this.getSelection();if(n.collapsed){var r=e.indexOf(":")+1;if(r)for(;"/"===e[r];)r+=1;at(n,this._doc.createTextNode(e.slice(r)))}return t||(t={}),t.href=e,this.changeFormat({tag:"A",attributes:t},{tag:"A"},n),this.focus()},Ft.removeLink=function(){return this.changeFormat(null,{tag:"A"},this.getSelection(),!0),this.focus()},Ft.setFontFace=function(e){return this.changeFormat({tag:"SPAN",attributes:{"class":"font",style:"font-family: "+e+", sans-serif;"}},{tag:"SPAN",attributes:{"class":"font"}}),this.focus()},Ft.setFontSize=function(e){return this.changeFormat({tag:"SPAN",attributes:{"class":"size",style:"font-size: "+("number"==typeof e?e+"px":e)}},{tag:"SPAN",attributes:{"class":"size"}}),this.focus()},Ft.setTextColour=function(e){return this.changeFormat({tag:"SPAN",attributes:{"class":"colour",style:"color: "+e}},{tag:"SPAN",attributes:{"class":"colour"}}),this.focus()},Ft.setHighlightColour=function(e){return this.changeFormat({tag:"SPAN",attributes:{"class":"highlight",style:"background-color: "+e}},{tag:"SPAN",attributes:{"class":"highlight"}}),this.focus()},Ft.setTextAlignment=function(e){return this.forEachBlock(function(t){t.className=(t.className.split(/\s+/).filter(function(e){return!/align/.test(e)}).join(" ")+" align-"+e).trim(),t.style.textAlign=e},!0),this.focus()},Ft.setTextDirection=function(e){return this.forEachBlock(function(t){t.dir=e},!0),this.focus()},Ft.removeAllFormatting=function(e){if(!e&&!(e=this.getSelection())||e.collapsed)return this;for(var t=e.commonAncestorContainer;t&&!d(t);)t=t.parentNode;if(t||(Ct(e),t=this._body),t.nodeType===R)return this;this._recordUndoState(e),this._getRangeAndRemoveBookmark(e),ft(e,t);for(var n,r,o,i=t.ownerDocument,a=e.startContainer,s=e.startOffset,l=e.endContainer,c=e.endOffset,h=i.createDocumentFragment(),f=i.createDocumentFragment(),u=y(l,c,t),p=y(a,s,t);p!==u;)n=p.nextSibling,h.appendChild(p),p=n;return L(this,h,f),f.normalize(),p=f.firstChild,n=f.lastChild,o=t.childNodes,p?(t.insertBefore(f,u),s=et.call(o,p),c=et.call(o,n)+1):(s=et.call(o,u),c=s),r={startContainer:t,startOffset:s,endContainer:t,endOffset:c},T(t,r),e.setStart(r.startContainer,r.startOffset),e.setEnd(r.endContainer,r.endOffset),ht(e),this.setSelection(e),this._updatePath(e,!0),this.focus()},Ft.increaseQuoteLevel=nn("modifyBlocks",qt),Ft.decreaseQuoteLevel=nn("modifyBlocks",Vt),Ft.makeUnorderedList=nn("modifyBlocks",Gt),Ft.makeOrderedList=nn("modifyBlocks",$t),Ft.removeList=nn("modifyBlocks",Yt),Ft.increaseListLevel=nn("modifyBlocks",Xt),Ft.decreaseListLevel=nn("modifyBlocks",Jt),top!==M?(M.editor=new O(e),M.onEditorLoad&&(M.onEditorLoad(M.editor),M.onEditorLoad=null)):"object"==typeof exports?module.exports=O:M.Squire=O}(document);
\ No newline at end of file
diff --git a/source/Clean.js b/source/Clean.js
index d32f89e..275cd05 100644
--- a/source/Clean.js
+++ b/source/Clean.js
@@ -172,10 +172,20 @@ var stylesRewriters = {
        and whitespace nodes.
     2. Convert inline tags into our preferred format.
 */
-var cleanTree = function ( node, allowStyles ) {
+var cleanTree = function cleanTree ( node ) {
     var children = node.childNodes,
-        i, l, child, nodeName, nodeType, rewriter, childLength,
-        data, j, ll;
+        blockParent, i, l, child, nodeName, nodeType, rewriter, childLength,
+        startsWithWS, endsWithWS, data;
+
+    blockParent = node;
+    while ( isInline( blockParent ) ) {
+        blockParent = blockParent.parentNode;
+    }
+    if ( !isBlock( blockParent ) ) {
+        blockParent = null;
+    }
+    contentWalker.root = blockParent;
+
     for ( i = 0, l = children.length; i < l; i += 1 ) {
         child = children[i];
         nodeName = child.nodeName;
@@ -188,55 +198,43 @@ var cleanTree = function ( node, allowStyles ) {
             } else if ( !allowedBlock.test( nodeName ) &&
                     !isInline( child ) ) {
                 i -= 1;
-                l += childLength - 1;
-                node.replaceChild( empty( child ), child );
+                if ( nodeName === 'HEAD' || nodeName === 'STYLE' ) {
+                    node.removeChild( child );
+                    l -= 1;
+                } else {
+                    l += childLength - 1;
+                    node.replaceChild( empty( child ), child );
+                }
                 continue;
-            } else if ( !allowStyles && child.style.cssText ) {
-                child.removeAttribute( 'style' );
             }
             if ( childLength ) {
-                cleanTree( child, allowStyles );
+                cleanTree( child );
             }
         } else {
             if ( nodeType === TEXT_NODE ) {
                 data = child.data;
-                // Use \S instead of notWS, because we want to remove nodes
+                // Use \s instead of notWS, because we want to remove nodes
                 // which are just nbsp, in order to cleanup <div>nbsp<br></div>
                 // construct.
-                if ( /\S/.test( data ) ) {
-                    // If the parent node is inline, don't trim this node as
-                    // it probably isn't at the end of the block.
-                    if ( isInline( node ) ) {
-                        continue;
-                    }
-                    j = 0;
-                    ll = data.length;
-                    if ( !i || !isInline( children[ i - 1 ] ) ) {
-                        while ( j < ll && !notWS.test( data.charAt( j ) ) ) {
-                            j += 1;
-                        }
-                        if ( j ) {
-                            child.data = data = data.slice( j );
-                            ll -= j;
-                        }
-                    }
-                    if ( i + 1 === l || !isInline( children[ i + 1 ] ) ) {
-                        j = ll;
-                        while ( j > 0 && !notWS.test( data.charAt( j - 1 ) ) ) {
-                            j -= 1;
-                        }
-                        if ( j < ll ) {
-                            child.data = data.slice( 0, j );
-                        }
-                    }
+                startsWithWS = /\s/.test( data.charAt( 0 ) );
+                endsWithWS = /\s/.test( data.charAt( data.length - 1 ) );
+                if ( !startsWithWS && !endsWithWS ) {
                     continue;
                 }
-                // If we have just white space, it may still be important if it
-                // separates two inline nodes, e.g. "<a>link</a> <a>link</a>".
-                else if ( i && i + 1 < l &&
-                        isInline( children[ i - 1 ] ) &&
-                        isInline( children[ i + 1 ] ) ) {
-                    child.data = ' ';
+                if ( startsWithWS ) {
+                    contentWalker.currentNode = child;
+                    if ( !blockParent || !contentWalker.previousNode() ) {
+                        data = data.replace( /^\s+/g, '' );
+                    }
+                }
+                if ( endsWithWS ) {
+                    contentWalker.currentNode = child;
+                    if ( !blockParent || !contentWalker.nextNode() ) {
+                        data = data.replace( /\s+$/g, '' );
+                    }
+                }
+                if ( data ) {
+                    child.data = data;
                     continue;
                 }
             }
diff --git a/source/Editor.js b/source/Editor.js
index b9c2639..b638343 100644
--- a/source/Editor.js
+++ b/source/Editor.js
@@ -1294,7 +1294,7 @@ proto.setHTML = function ( html ) {
     div.innerHTML = html;
     frag.appendChild( empty( div ) );
 
-    cleanTree( frag, true );
+    cleanTree( frag );
     cleanupBRs( frag );
 
     fixContainer( frag );
@@ -1448,7 +1448,7 @@ proto.insertHTML = function ( html, isPaste ) {
         };
 
         addLinks( frag );
-        cleanTree( frag, true );
+        cleanTree( frag );
         cleanupBRs( frag );
         removeEmptyInlines( frag );
         frag.normalize();
