Merge pull request #66 from vijay40/master

Allow special symbols for direction along with acronyms

src/diagrams/flowchart/parser/flow.jison

@@ -26,6 +26,8 @@
 "."                   return 'DOT';
 "<"                   return 'TAGSTART';
 ">"                   return 'TAGEND';
+"^"                   return 'UP'
+"v"                   return 'DOWN'
 \-\-[x]               return 'ARROW_CROSS';
 \-\-\>                return 'ARROW_POINT';
 \-\-[o]               return 'ARROW_CIRCLE';
@@ -128,14 +130,21 @@ expressions
     ;
 
 graphConfig
-    : GRAPH SPACE DIR SEMI
+    : GRAPH SPACE DIR FirstStmtSeperator
-        { yy.setDirection($3);$$ = $3;}
-    | GRAPH SPACE DIR NEWLINE
-        { yy.setDirection($3);$$ = $3;}
-    | GRAPH SPACE DIR spaceList NEWLINE
         { yy.setDirection($3);$$ = $3;}
+    | GRAPH SPACE TAGEND FirstStmtSeperator
+        { yy.setDirection("LR");$$ = $3;}
+    | GRAPH SPACE TAGSTART FirstStmtSeperator
+        { yy.setDirection("RL");$$ = $3;}
+    | GRAPH SPACE UP FirstStmtSeperator
+        { yy.setDirection("BT");$$ = $3;}
+    | GRAPH SPACE DOWN FirstStmtSeperator
+        { yy.setDirection("TB");$$ = $3;}
     ;
 
+FirstStmtSeperator 
+    : SEMI | NEWLINE | spaceList NEWLINE ;
+
 statements
     : statement spaceListNewline statements
     | statement statements

src/diagrams/flowchart/parser/flow.spec.js

@@ -30,6 +30,84 @@ describe('when parsing ',function(){
         expect(edges[0].text).toBe('');
     });
 
+    it('should handle angle bracket '>' as direction LR',function(){
+        var res = flow.parser.parse('graph >;A-->B;');
+
+
+        var vert = flow.parser.yy.getVertices();
+        var edges = flow.parser.yy.getEdges();
+        var direction = flow.parser.yy.getDirection();
+
+        expect(direction).toBe('LR');
+
+        expect(vert['A'].id).toBe('A');
+        expect(vert['B'].id).toBe('B');
+        expect(edges.length).toBe(1);
+        expect(edges[0].start).toBe('A');
+        expect(edges[0].end).toBe('B');
+        expect(edges[0].type).toBe('arrow');
+        expect(edges[0].text).toBe('');
+    });
+
+    it('should handle angle bracket '<' as direction RL',function(){
+        var res = flow.parser.parse('graph <;A-->B;');
+
+
+        var vert = flow.parser.yy.getVertices();
+        var edges = flow.parser.yy.getEdges();
+        var direction = flow.parser.yy.getDirection();
+
+        expect(direction).toBe('RL');
+
+        expect(vert['A'].id).toBe('A');
+        expect(vert['B'].id).toBe('B');
+        expect(edges.length).toBe(1);
+        expect(edges[0].start).toBe('A');
+        expect(edges[0].end).toBe('B');
+        expect(edges[0].type).toBe('arrow');
+        expect(edges[0].text).toBe('');
+    });
+
+
+    it('should handle caret '^' as direction BT',function(){
+        var res = flow.parser.parse('graph ^;A-->B;');
+
+
+        var vert = flow.parser.yy.getVertices();
+        var edges = flow.parser.yy.getEdges();
+        var direction = flow.parser.yy.getDirection();
+
+        expect(direction).toBe('BT');
+
+        expect(vert['A'].id).toBe('A');
+        expect(vert['B'].id).toBe('B');
+        expect(edges.length).toBe(1);
+        expect(edges[0].start).toBe('A');
+        expect(edges[0].end).toBe('B');
+        expect(edges[0].type).toBe('arrow');
+        expect(edges[0].text).toBe('');
+    });
+
+
+    it('should handle lower-case \'v\' as direction TB',function(){
+        var res = flow.parser.parse('graph v;A-->B;');
+
+
+        var vert = flow.parser.yy.getVertices();
+        var edges = flow.parser.yy.getEdges();
+        var direction = flow.parser.yy.getDirection();
+
+        expect(direction).toBe('TB');
+
+        expect(vert['A'].id).toBe('A');
+        expect(vert['B'].id).toBe('B');
+        expect(edges.length).toBe(1);
+        expect(edges[0].start).toBe('A');
+        expect(edges[0].end).toBe('B');
+        expect(edges[0].type).toBe('arrow');
+        expect(edges[0].text).toBe('');
+    });
+
     it('should handle a nodes and edges and a space between link and node',function(){
         var res = flow.parser.parse('graph TD;A --> B;');