Allowing arbitrary nesting for bullets

This allows any level of indentation for bullets. It does this by introducing
invalid HTML. In particular, you can make bullets like:

<ul>
  <ul>
    <li>foo</li>
  </ul>
</ul>

build/squire-raw.js

@@ -1636,12 +1636,9 @@ var keyHandlers = {
             while ( parent = node.parentNode ) {
                 // If we find a UL or OL (so are in a list, node must be an LI)
                 if ( parent.nodeName === 'UL' || parent.nodeName === 'OL' ) {
-                    // AND the LI is not the first in the list
-                    if ( node.previousSibling ) {
                     // Then increase the list level
                     event.preventDefault();
                     self.modifyBlocks( increaseListLevel, range );
-                    }
                     break;
                 }
                 node = parent;
@@ -3764,19 +3761,19 @@ var makeOrderedList = function ( frag ) {
 
 var removeList = function ( frag ) {
     var lists = frag.querySelectorAll( 'UL, OL' ),
-        i, l, ll, list, listFrag, children, child;
+        items =  frag.querySelectorAll( 'LI' ),
+        i, l, list, listFrag, item;
     for ( i = 0, l = lists.length; i < l; i += 1 ) {
         list = lists[i];
         listFrag = empty( list );
-        children = listFrag.childNodes;
-        ll = children.length;
-        while ( ll-- ) {
-            child = children[ll];
-            replaceWith( child, empty( child ) );
-        }
         fixContainer( listFrag, this._root );
         replaceWith( list, listFrag );
     }
+
+    for ( i = 0, l = items.length; i < l; i += 1 ) {
+        item = items[i];
+        replaceWith( item, empty( item ) );
+    }
     return frag;
 };
 
@@ -3785,7 +3782,6 @@ var increaseListLevel = function ( frag ) {
         i, l, item,
         type, newParent,
         tagAttributes = this._config.tagAttributes,
-        listItemAttrs = tagAttributes.li,
         listAttrs;
     for ( i = 0, l = items.length; i < l; i += 1 ) {
         item = items[i];
@@ -3796,11 +3792,11 @@ var increaseListLevel = function ( frag ) {
             if ( !newParent || !( newParent = newParent.lastChild ) ||
                     newParent.nodeName !== type ) {
                 listAttrs = tagAttributes[ type.toLowerCase() ];
+                newParent = this.createElement( type, listAttrs );
+
                 replaceWith(
                     item,
-                    this.createElement( 'LI', listItemAttrs, [
+                    newParent
-                        newParent = this.createElement( type, listAttrs )
-                    ])
                 );
             }
             newParent.appendChild( item );
@@ -3823,6 +3819,15 @@ var decreaseListLevel = function ( frag ) {
         if ( item.previousSibling ) {
             parent = split( parent, item, newParent, root );
         }
+
+        // if the new parent is another list then we simply move the node
+        // e.g. `ul > ul > li` becomes `ul > li`
+        if ( /^[OU]L$/.test( newParent.nodeName ) ) {
+            newParent.insertBefore( item, parent );
+            if ( !parent.firstChild ) {
+                newParent.removeChild( parent );
+            }
+        } else {
             while ( node ) {
                 next = node.nextSibling;
                 if ( isContainer( node ) ) {
@@ -3831,6 +3836,7 @@ var decreaseListLevel = function ( frag ) {
                 newParent.insertBefore( node, parent );
                 node = next;
             }
+        }
         if ( newParent.nodeName === 'LI' && first.previousSibling ) {
             split( newParent, first, newParent.parentNode, root );
         }

source/Editor.js

@@ -1406,19 +1406,19 @@ var makeOrderedList = function ( frag ) {
 
 var removeList = function ( frag ) {
     var lists = frag.querySelectorAll( 'UL, OL' ),
-        i, l, ll, list, listFrag, children, child;
+        items =  frag.querySelectorAll( 'LI' ),
+        i, l, list, listFrag, item;
     for ( i = 0, l = lists.length; i < l; i += 1 ) {
         list = lists[i];
         listFrag = empty( list );
-        children = listFrag.childNodes;
-        ll = children.length;
-        while ( ll-- ) {
-            child = children[ll];
-            replaceWith( child, empty( child ) );
-        }
         fixContainer( listFrag, this._root );
         replaceWith( list, listFrag );
     }
+
+    for ( i = 0, l = items.length; i < l; i += 1 ) {
+        item = items[i];
+        replaceWith( item, empty( item ) );
+    }
     return frag;
 };
 
@@ -1427,7 +1427,6 @@ var increaseListLevel = function ( frag ) {
         i, l, item,
         type, newParent,
         tagAttributes = this._config.tagAttributes,
-        listItemAttrs = tagAttributes.li,
         listAttrs;
     for ( i = 0, l = items.length; i < l; i += 1 ) {
         item = items[i];
@@ -1438,11 +1437,11 @@ var increaseListLevel = function ( frag ) {
             if ( !newParent || !( newParent = newParent.lastChild ) ||
                     newParent.nodeName !== type ) {
                 listAttrs = tagAttributes[ type.toLowerCase() ];
+                newParent = this.createElement( type, listAttrs );
+
                 replaceWith(
                     item,
-                    this.createElement( 'LI', listItemAttrs, [
+                    newParent
-                        newParent = this.createElement( type, listAttrs )
-                    ])
                 );
             }
             newParent.appendChild( item );
@@ -1465,6 +1464,15 @@ var decreaseListLevel = function ( frag ) {
         if ( item.previousSibling ) {
             parent = split( parent, item, newParent, root );
         }
+
+        // if the new parent is another list then we simply move the node
+        // e.g. `ul > ul > li` becomes `ul > li`
+        if ( /^[OU]L$/.test( newParent.nodeName ) ) {
+            newParent.insertBefore( item, parent );
+            if ( !parent.firstChild ) {
+                newParent.removeChild( parent );
+            }
+        } else {
             while ( node ) {
                 next = node.nextSibling;
                 if ( isContainer( node ) ) {
@@ -1473,6 +1481,7 @@ var decreaseListLevel = function ( frag ) {
                 newParent.insertBefore( node, parent );
                 node = next;
             }
+        }
         if ( newParent.nodeName === 'LI' && first.previousSibling ) {
             split( newParent, first, newParent.parentNode, root );
         }

source/KeyHandlers.js

@@ -390,12 +390,9 @@ var keyHandlers = {
             while ( parent = node.parentNode ) {
                 // If we find a UL or OL (so are in a list, node must be an LI)
                 if ( parent.nodeName === 'UL' || parent.nodeName === 'OL' ) {
-                    // AND the LI is not the first in the list
-                    if ( node.previousSibling ) {
                     // Then increase the list level
                     event.preventDefault();
                     self.modifyBlocks( increaseListLevel, range );
-                    }
                     break;
                 }
                 node = parent;

test/squire.spec.js

@@ -272,6 +272,85 @@ describe('Squire RTE', function () {
         });
     });
 
+    describe('multi-level lists', function () {
+      it('increases list indentation', function() {
+        var startHTML = '<ul><li><div>a</div></li><li><div>b</div></li><li><div>c</div></li></ul>';
+        editor.setHTML(startHTML);
+        expect(editor, 'to contain HTML', startHTML);
+
+        var range = doc.createRange();
+        var textNode = doc.getElementsByTagName('li').item(1).childNodes[0].childNodes[0]
+        range.setStart(textNode, 0);
+        range.setEnd(textNode, 0);
+        editor.setSelection(range);
+
+        editor.increaseListLevel()
+        expect(editor, 'to contain HTML', '<ul><li><div>a</div></li><ul><li><div>b</div></li></ul><li><div>c</div></li></ul>');
+      });
+
+      it('increases list indentation 2', function() {
+        var startHTML = '<ul><li><div>a</div></li><li><div>b</div></li><li><div>c</div></li></ul>';
+        editor.setHTML(startHTML);
+        expect(editor, 'to contain HTML', startHTML);
+
+        var range = doc.createRange();
+        var textNode = doc.getElementsByTagName('li').item(1).childNodes[0].childNodes[0]
+        range.setStart(textNode, 0);
+        range.setEnd(textNode, 0);
+        editor.setSelection(range);
+
+        editor.increaseListLevel()
+        editor.increaseListLevel()
+        expect(editor, 'to contain HTML', '<ul><li><div>a</div></li><ul><ul><li><div>b</div></li></ul></ul><li><div>c</div></li></ul>');
+      });
+
+      it('decreases list indentation', function() {
+        var startHTML = '<ul><li><div>a</div></li><ul><li><div>b</div></li></ul><li><div>c</div></li></ul>';
+        editor.setHTML(startHTML);
+        expect(editor, 'to contain HTML', startHTML);
+
+        var range = doc.createRange();
+        var textNode = doc.getElementsByTagName('li').item(1).childNodes[0].childNodes[0]
+        range.setStart(textNode, 0);
+        range.setEnd(textNode, 0);
+        editor.setSelection(range);
+
+        editor.decreaseListLevel()
+        expect(editor, 'to contain HTML', '<ul><li><div>a</div></li><li><div>b</div></li><li><div>c</div></li></ul>');
+      });
+
+      it('decreases list indentation 2', function() {
+        var startHTML = '<ul><li><div>a</div></li><ul><ul><li><div>b</div></li></ul></ul><li><div>c</div></li></ul>';
+        editor.setHTML(startHTML);
+        expect(editor, 'to contain HTML', startHTML);
+
+        var range = doc.createRange();
+        var textNode = doc.getElementsByTagName('li').item(1).childNodes[0].childNodes[0]
+        range.setStart(textNode, 0);
+        range.setEnd(textNode, 0);
+        editor.setSelection(range);
+
+        editor.decreaseListLevel()
+        editor.decreaseListLevel()
+        expect(editor, 'to contain HTML', '<ul><li><div>a</div></li><li><div>b</div></li><li><div>c</div></li></ul>');
+      });
+
+      it('removes lists', function() {
+        var startHTML = '<ul><li><div>foo</div></li><ul><li><div>bar</div></li></ul></ul>';
+        editor.setHTML(startHTML);
+        expect(editor, 'to contain HTML', startHTML);
+
+        var range = doc.createRange();
+        var textNode = doc.getElementsByTagName('li').item(1).childNodes[0].childNodes[0]
+        range.setStart(textNode, 0);
+        range.setEnd(textNode, 0);
+        editor.setSelection(range);
+
+        editor.removeList()
+        expect(editor, 'to contain HTML', '<ul><li><div>foo</div></li></ul><div>bar</div>');
+      })
+    });
+
     afterEach(function () {
         editor = null;
         var iframe = document.getElementById('testFrame');