如何使 cnblogs 博客园 的 markdown 支持流程图

使用 flowchart.js，markdown 代码示例如下：

示例 1：

<textarea id="flowchartcode" style="display:none">
st=>start: Start:>http://www.bing.com[blank]
e=>end:>http://www.bing.com
op1=>operation: My Operation
sub1=>subroutine: My Subroutine
cond=>condition: Yes
or No?:>http://www.bing.com
io=>inputoutput: catch something...
para=>parallel: parallel tasks
st->op1->cond
cond(yes)->io->e
cond(no)->para
para(path1, bottom)->sub1(right)->op1
para(path2, top)->op1
</textarea>
<div id="diagram"></div>

示例 2：

<div id="flowchartcode" style="display:none">
st=>start: Start|past:>http://www.bing.com[blank]
e=>end: End|future:>http://www.bing.com
op1=>operation: My Operation|past
op2=>operation: Stuff|current
sub1=>subroutine: My Subroutine|invalid
cond=>condition: Yes
or No?|approved:>http://www.bing.com
c2=>condition: Good idea|rejected
io=>inputoutput: catch something...|future
st->op1(right)->cond
cond(yes, right)->c2
cond(no)->sub1(left)->op1
c2(yes)->io->e
c2(no)->op2->e
</div>
<div id="diagram"></div>

示例 3：

<div id="flowchartcode" style="display:none">
st=>start: Start|past:>http://www.bing.com[blank]
e=>end: End|future:>http://www.bing.com
op1=>operation: My Operation|past
op2=>operation: Stuff|current
sub1=>subroutine: My Subroutine|invalid
cond=>condition: Yes
or No?|approved:>http://www.bing.com
c2=>condition: Good idea|rejected
io=>inputoutput: catch something...|future
st->op1(right)->cond
cond(yes, right)->c2
cond(no)->sub1(left)->op1
c2(yes)->io->e
c2(no)->op2->e
</div>
<div id="diagram"></div>

具体方法，首先要向 cnblogs 的管理员申请博客添加 javascript 的权限。之后根据建议将 flowchart 的 js 添加到页脚位置，代码如下：

<script src="https://code.jquery.com/jquery-2.2.0.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/raphael/2.3.0/raphael.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/flowchart/1.16.0/flowchart.min.js"></script>

<script>
  // flow chart code in html with id="#flowchartcode", style="display: none"
  var fcc = $("#flowchartcode").text();
  var diagramobj = flowchart.parse(fcc);
  // output <svg> tag to id="#diagram" in html
  //diagramobj.drawSVG('diagram');

  // you can also try to pass options:

  diagramobj.drawSVG('diagram', {
                              'x': 0,
                              'y': 0,
                              'line-width': 3,
                              'line-length': 50,
                              'text-margin': 10,
                              'font-size': 14,
                              'font-color': 'black',
                              'line-color': 'black',
                              'element-color': 'black',
                              'fill': 'white',
                              'yes-text': 'yes',
                              'no-text': 'no',
                              'arrow-end': 'block',
                              'scale': 1,
                              // style symbol types
                              'symbols': {
                                'start': {
                                  'font-color': 'red',
                                  'element-color': 'green',
                                  'fill': 'yellow'
                                },
                                'end':{
                                  'class': 'end-element'
                                }
                              },
                              // even flowstate support ;-)
                              'flowstate' : {
                                'past' : { 'fill' : '#CCCCCC', 'font-size' : 12},
                                'current' : {'fill' : 'yellow', 'font-color' : 'red', 'font-weight' : 'bold'},
                                'future' : { 'fill' : '#FFFF99'},
                                'request' : { 'fill' : 'blue'},
                                'invalid': {'fill' : '#444444'},
                                'approved' : { 'fill' : '#58C4A3', 'font-size' : 12, 'yes-text' : 'APPROVED', 'no-text' : 'n/a' },
                                'rejected' : { 'fill' : '#C45879', 'font-size' : 12, 'yes-text' : 'n/a', 'no-text' : 'REJECTED' }
                              }
                            });
</script>

demo 示例：

st=>start: Start:>http://www.bing.com[blank] e=>end:>http://www.bing.com op1=>operation: My Operation sub1=>subroutine: My Subroutine cond=>condition: Yes or No?:>http://www.bing.com io=>inputoutput: catch something... para=>parallel: parallel tasks st->op1->cond cond(yes)->io->e cond(no)->para para(path1, bottom)->sub1(right)->op1 para(path2, top)->op1