Improve cleanupEnableBackground plugin.

plugins/cleanupEnableBackground.js

@@ -1,12 +1,9 @@
 'use strict';
 
-exports.type = 'perItem';
+exports.type = 'full';
 
 exports.active = true;
 
-var regEnableBackground = /^new\s0\s0\s([\-+]?\d*\.?\d+([eE][\-+]?\d+)?)\s([\-+]?\d*\.?\d+([eE][\-+]?\d+)?)$/,
-    elems = ['svg', 'mask', 'pattern'];
-
 /**
  * Remove or cleanup enable-background attr which coincides with a width/height box.
  *
@@ -22,30 +19,64 @@ var regEnableBackground = /^new\s0\s0\s([\-+]?\d*\.?\d+([eE][\-+]?\d+)?)\s([\-+]
  *
  * @author Kir Belevich
  */
-exports.fn = function(item) {
+exports.fn = function(data) {
 
-    if (
-        item.isElem(elems) &&
-        item.hasAttr('enable-background') &&
-        item.hasAttr('width') &&
-        item.hasAttr('height')
-    ) {
+    var regEnableBackground = /^new\s0\s0\s([\-+]?\d*\.?\d+([eE][\-+]?\d+)?)\s([\-+]?\d*\.?\d+([eE][\-+]?\d+)?)$/,
+        hasFilter = false,
+        elems = ['svg', 'mask', 'pattern'];
 
-        var match = item.attr('enable-background').value.match(regEnableBackground);
+    function checkEnableBackground(item) {
+        if (
+            item.isElem(elems) &&
+            item.hasAttr('enable-background') &&
+            item.hasAttr('width') &&
+            item.hasAttr('height')
+        ) {
 
-        if (match) {
-            if (
-                item.attr('width').value === match[1] &&
-                item.attr('height').value === match[3]
-            ) {
-                if (item.isElem('svg')) {
-                    item.removeAttr('enable-background');
-                } else {
-                    item.attr('enable-background').value = 'new';
+            var match = item.attr('enable-background').value.match(regEnableBackground);
+
+            if (match) {
+                if (
+                    item.attr('width').value === match[1] &&
+                    item.attr('height').value === match[3]
+                ) {
+                    if (item.isElem('svg')) {
+                        item.removeAttr('enable-background');
+                    } else {
+                        item.attr('enable-background').value = 'new';
+                    }
                 }
             }
-        }
 
+        }
     }
 
+    function checkForFilter(item) {
+        if (item.isElem('filter')) {
+            hasFilter = true;
+        }
+    }
+
+    function monkeys(items, fn) {
+        items.content.forEach(function(item) {
+            fn(item);
+
+            if (item.content) {
+                monkeys(item, fn);
+            }
+        });
+        return items;
+    }
+
+    var firstStep = monkeys(data, function(item) {
+        checkEnableBackground(item);
+        if (!hasFilter) {
+            checkForFilter(item);
+        }
+    });
+
+    return hasFilter ? firstStep : monkeys(firstStep, function(item) {
+            //we don't need 'enable-background' if we have no filters
+            item.removeAttr('enable-background');
+        });
 };

test/plugins/cleanupEnableBackground.01.svg

@@ -1,9 +1,19 @@
 <svg xmlns="http://www.w3.org/2000/svg" width="100.5" height=".5" enable-background="new 0 0 100.5 .5">
+    <defs>
+        <filter id="ShiftBGAndBlur">
+            <feOffset dx="0" dy="75"/>
+        </filter>
+    </defs>
     test
 </svg>
 
 @@@
 
 <svg xmlns="http://www.w3.org/2000/svg" width="100.5" height=".5">
+    <defs>
+        <filter id="ShiftBGAndBlur">
+            <feOffset dx="0" dy="75"/>
+        </filter>
+    </defs>
     test
 </svg>

test/plugins/cleanupEnableBackground.02.svg

@@ -1,9 +1,19 @@
 <svg xmlns="http://www.w3.org/2000/svg" width="50" height="50" enable-background="new 0 0 100 50">
+    <defs>
+        <filter id="ShiftBGAndBlur">
+            <feOffset dx="0" dy="75"/>
+        </filter>
+    </defs>
     test
 </svg>
 
 @@@
 
 <svg xmlns="http://www.w3.org/2000/svg" width="50" height="50" enable-background="new 0 0 100 50">
+    <defs>
+        <filter id="ShiftBGAndBlur">
+            <feOffset dx="0" dy="75"/>
+        </filter>
+    </defs>
     test
 </svg>

test/plugins/cleanupEnableBackground.03.svg

@@ -1,4 +1,9 @@
 <svg xmlns="http://www.w3.org/2000/svg">
+    <defs>
+        <filter id="ShiftBGAndBlur">
+            <feOffset dx="0" dy="75"/>
+        </filter>
+    </defs>
     <mask width="100" height="50" enable-background="new 0 0 100 50">
         test
     </mask>
@@ -7,6 +12,11 @@
 @@@
 
 <svg xmlns="http://www.w3.org/2000/svg">
+    <defs>
+        <filter id="ShiftBGAndBlur">
+            <feOffset dx="0" dy="75"/>
+        </filter>
+    </defs>
     <mask width="100" height="50" enable-background="new">
         test
     </mask>

test/plugins/cleanupEnableBackground.04.svg

@@ -0,0 +1,13 @@
+<svg xmlns="http://www.w3.org/2000/svg">
+    <mask width="100" height="50" enable-background="new 0 0 100 50">
+        test
+    </mask>
+</svg>
+
+@@@
+
+<svg xmlns="http://www.w3.org/2000/svg">
+    <mask width="100" height="50">
+        test
+    </mask>
+</svg>