add support for --theme

README.md

@@ -38,6 +38,7 @@ You have a couple of formatting options via attributes of the fenced code block
 
 - Image Format - Use `{.mermaid format=svg}`     Default is png
 - Width  - Use `{.mermaid width=400}`     default with is 500
+- Theme - Use `{.mermaid theme=forest}` default is 'default'. Corresponds to `--theme`  flag of mermaid.cli
 - Save path - Use `{.mermaid loc=img}`  default loc=inline which will
   encode the image in a `data uri` scheme.
     - Possible values for `loc`
@@ -49,3 +50,10 @@ You have a couple of formatting options via attributes of the fenced code block
 
 Note that to specify options, you need to use the curly braces syntax and have the `.mermaid` class attached.
 Admittedly, this is uglier than the earlier syntax on top - but that's how Pandoc wants it.
+
+JSON and CSS configuration
+---------------------------
+
+Mermaid cli allows you to specify additional options in a json configuration file and a css file. `mermaid-filter`
+will look in the current directory for `.mermaid-config.json` and `.mermaid.css` and if found, pass them in to 
+mermaid cli.

index.js

@@ -18,7 +18,7 @@ function mermaid(type, value, format, meta) {
     var attrs = value[0],
         content = value[1];
     var classes = attrs[1];
-    var options = {width: '500', format: 'png', loc: 'inline'};
+    var options = {width: '500', format: 'png', loc: 'inline', theme: "default"};
     var configFile = path.join(folder, ".mermaid-config.json")
     var confFileOpts = ""
     if (fs.existsSync(configFile)) {
@@ -48,7 +48,7 @@ function mermaid(type, value, format, meta) {
     // console.log(outdir);
     var savePath = tmpfileObj.name + "." + options.format
     var newPath = path.join(outdir, `${prefix}-${counter}.${options.format}`);
-    var fullCmd = `${cmd}  ${confFileOpts} -w ${options.width} -i ${tmpfileObj.name} -o ${savePath}` 
+    var fullCmd = `${cmd}  ${confFileOpts} -w ${options.width} -i ${tmpfileObj.name} -t ${options.theme} -o ${savePath}` 
     // console.log(fullCmd, savePath)
     exec(fullCmd);
     //console.log(oldPath, newPath);

test.md

@@ -19,3 +19,13 @@ sequenceDiagram
     Alice->>John: Hello John, how are you?
     John-->>Alice: Great!
 ```
+
+With theme specified
+---------------------
+
+```{.mermaid width=100 format=svg theme=forest}
+sequenceDiagram
+    Alice->>John: Hello John, how are you?
+    John-->>Alice: Great!
+```
+