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1 files changed, 84 insertions, 0 deletions

diff --git a/node_modules/svgo/plugins/cleanupEnableBackground.js b/node_modules/svgo/plugins/cleanupEnableBackground.js
new file mode 100644
index 00000000..e6384ab5
--- /dev/null
+++ b/node_modules/svgo/plugins/cleanupEnableBackground.js
@@ -0,0 +1,84 @@
+'use strict';
+
+exports.type = 'full';
+
+exports.active = true;
+
+exports.description = 'remove or cleanup enable-background attribute when possible';
+
+/**
+ * Remove or cleanup enable-background attr which coincides with a width/height box.
+ *
+ * @see http://www.w3.org/TR/SVG/filters.html#EnableBackgroundProperty
+ *
+ * @example
+ * <svg width="100" height="50" enable-background="new 0 0 100 50">
+ *             ⬇
+ * <svg width="100" height="50">
+ *
+ * @param {Object} item current iteration item
+ * @return {Boolean} if false, item will be filtered out
+ *
+ * @author Kir Belevich
+ */
+exports.fn = function(data) {
+
+    var regEnableBackground = /^new\s0\s0\s([\-+]?\d*\.?\d+([eE][\-+]?\d+)?)\s([\-+]?\d*\.?\d+([eE][\-+]?\d+)?)$/,
+        hasFilter = false,
+        elems = ['svg', 'mask', 'pattern'];
+
+    function checkEnableBackground(item) {
+        if (
+            item.isElem(elems) &&
+            item.hasAttr('enable-background') &&
+            item.hasAttr('width') &&
+            item.hasAttr('height')
+        ) {
+
+            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');
+        });
+};