add path split by segment

src/graphics/pathBoolean.js

@@ -6,6 +6,7 @@
 define(function (require) {
     var contours2svg = require('fonteditor-core/ttf/util/contours2svg');
     var path2contours = require('fonteditor-core/ttf/svg/path2contours');
+    var reducePath = require('./reducePath');
     var paper = require('paper');
 
     var RELATION = {
@@ -65,6 +66,12 @@ define(function (require) {
 
         var contours = resultPath ? getContours(resultPath) : paths;
         paper.clear();
+
+        // 清除重复的冗余节点
+        for (var i = 0, l = contours.length; i < l; i++) {
+            contours[i] = reducePath(contours[i]);
+        }
+
         return contours;
     }
 

src/graphics/pathSplitBySegment.js

@@ -5,6 +5,31 @@
 
 define(
     function (require) {
+        var path2contours = require('fonteditor-core/ttf/svg/path2contours');
+        var contours2svg = require('fonteditor-core/ttf/util/contours2svg');
+
+        var reducePath = require('./reducePath');
+        var paper = require('paper');
+
+
+
+        function initPaper() {
+            if (!paper.project) {
+                paper.setup(document.createElement('canvas'));
+            }
+        }
+
+        function getPath(contours) {
+            // 根据contours获取paper.Path对象
+            var d = contours2svg(contours);
+            return new paper.CompoundPath(d);
+        }
+
+        function getContours(path) {
+            // 根据path获取contours数组
+            var d = path.getPathData();
+            return path2contours(d);
+        }
 
         /**
          * 线段切割路径
@@ -15,7 +40,35 @@ define(
          * @return {Array|false} 切割后路径或者false
          */
         function pathSplitBySegment(paths, p0, p1) {
-            return paths;
+            initPaper();
+            var subject = getPath(paths);
+            var clipper = new paper.Path({
+                segments: [
+                    [p0.x, p0.y],
+                    [p1.x, p1.y]
+                ],
+                closed: false
+            });
+
+            var intersections = subject.getIntersections(clipper); // 分割
+            if (!intersections || !intersections.length) {
+                return paths;
+            }
+            // 根据交点分割路径
+            intersections.forEach(function (spliter) {
+                var result = spliter.split();
+            });
+            // 闭合路径
+            subject.children.forEach(function (path) {
+                path.segments[0].clearHandles();
+                path.segments[path.segments.length - 1].clearHandles();
+                path.closePath();
+            });
+            subject.resolveCrossings().reorient();
+            var contours = getContours(subject) ;
+            paper.clear();
+
+            return contours;
         }
 
         return pathSplitBySegment;