From 9124bf809ee88b0d91dd2ff66d2e03b0ce09fbf4 Mon Sep 17 00:00:00 2001
From: deepsweet <kir@soulshine.in>
Date: Thu, 11 Apr 2013 21:15:41 +0300
Subject: [PATCH] plugins/mergePaths: new plugin

---
 .svgo.yml                      |  5 +++-
 README.md                      |  1 +
 README.ru.md                   |  1 +
 plugins/mergePaths.js          | 45 ++++++++++++++++++++++++++++++++++
 test/plugins/mergePaths.01.svg | 17 +++++++++++++
 5 files changed, 68 insertions(+), 1 deletion(-)
 create mode 100644 plugins/mergePaths.js
 create mode 100644 test/plugins/mergePaths.01.svg

diff --git a/.svgo.yml b/.svgo.yml
index 85c8fa9b..30704fe3 100644
--- a/.svgo.yml
+++ b/.svgo.yml
@@ -1,3 +1,6 @@
+# replace default config
+# full: true
+
 plugins:
 
   # - name
@@ -35,6 +38,6 @@ plugins:
   - convertTransform
   - removeEmptyAttrs
   - removeEmptyContainers
+  - mergePaths
   - cleanupIDs
   - removeUnusedNS
-  - cropAndCenterAlongPath
diff --git a/README.md b/README.md
index d168e319..da2a8fbf 100644
--- a/README.md
+++ b/README.md
@@ -43,6 +43,7 @@ Today we have:
 * [ [>](https://github.com/svg/svgo/blob/master/plugins/moveGroupAttrsToElems.js) ] move some group attributes to the content elements
 * [ [>](https://github.com/svg/svgo/blob/master/plugins/collapseGroups.js) ] collapse useless groups
 * [ [>](https://github.com/svg/svgo/blob/master/plugins/removeRasterImages.js) ] remove raster images (disabled by default)
+* [ [>](https://github.com/svg/svgo/blob/master/plugins/mergePath.js) ] merge multiple Paths into one
 
 Want to know how it works and how to write your own plugin? [Of course you want to](https://github.com/svg/svgo/blob/master/docs/how-it-works/en.md).
 
diff --git a/README.ru.md b/README.ru.md
index 0ce75a78..93aa472b 100644
--- a/README.ru.md
+++ b/README.ru.md
@@ -43,6 +43,7 @@ SVGO имеет расширяемую архитектуру, в которой
 * [ [>](https://github.com/svg/svgo/blob/master/plugins/moveGroupAttrsToElems.js) ] перемещение некоторых атрибутов группы на элементы внутри
 * [ [>](https://github.com/svg/svgo/blob/master/plugins/collapseGroups.js) ] схлопывание бесполезных групп `<g>`
 * [ [>](https://github.com/svg/svgo/blob/master/plugins/removeRasterImages.js) ] удаление растровых изображений (выключено по умолчанию)
+* [ [>](https://github.com/svg/svgo/blob/master/plugins/mergePath.js) ] склеивание нескольких Path в одну кривую
 
 Хотите узнать, как это работает и как написать свой плагин? [Конечно же, да!](https://github.com/svg/svgo/blob/master/docs/how-it-works/ru.md).
 
diff --git a/plugins/mergePaths.js b/plugins/mergePaths.js
new file mode 100644
index 00000000..73d34c0e
--- /dev/null
+++ b/plugins/mergePaths.js
@@ -0,0 +1,45 @@
+'use strict';
+
+exports.type = 'perItem';
+
+exports.active = true;
+
+/**
+ * Merge multiple Paths into one.
+ *
+ * @param {Object} item current iteration item
+ * @return {Boolean} if false, item will be filtered out
+ *
+ * @author Kir Belevich
+ */
+exports.fn = function(item) {
+
+    if (item.isElem() && !item.isEmpty()) {
+
+        var prevContentItem;
+
+        item.content = item.content.filter(function(contentItem) {
+
+            // merge only <path d="...z" />
+            if (prevContentItem &&
+                prevContentItem.isElem('path') &&
+                prevContentItem.hasAttr('d') &&
+                Object.keys(prevContentItem.attrs).length === 1 &&
+                prevContentItem.attr('d').value.charAt(prevContentItem.attr('d').value.length - 1) === 'z' &&
+                contentItem.isElem('path') &&
+                contentItem.hasAttr('d') &&
+                Object.keys(contentItem.attrs).length === 1
+            ) {
+                prevContentItem.attr('d').value += contentItem.attr('d').value;
+
+                return false;
+            }
+
+            prevContentItem = contentItem;
+
+            return true;
+
+        });
+    }
+
+};
diff --git a/test/plugins/mergePaths.01.svg b/test/plugins/mergePaths.01.svg
new file mode 100644
index 00000000..357add91
--- /dev/null
+++ b/test/plugins/mergePaths.01.svg
@@ -0,0 +1,17 @@
+<svg xmlns="http://www.w3.org/2000/svg">
+    <path d="M 0,0 z"/>
+    <path d="M 10,10 z"/>
+    <path d="M 20,20"/>
+    <path d="M 30,30 z"/>
+    <path d="M 30,30 z" fill="#f00"/>
+    <path d="M 40,40 z"/>
+</svg>
+
+@@@
+
+<svg xmlns="http://www.w3.org/2000/svg">
+    <path d="M 0,0 zM 10,10 zM 20,20"/>
+    <path d="M 30,30 z"/>
+    <path d="M 30,30 z" fill="#f00"/>
+    <path d="M 40,40 z"/>
+</svg>