08-27-周三_17-09-29

node_modules/gitbook-plugin-mermaid/index.js

@@ -0,0 +1,70 @@
+var path         = require('path');
+var readFileSync = require('fs').readFileSync;
+var url          = require('url');
+
+var phantom = require('phantom');
+var Q       = require('q');
+
+
+const PHANTOMJS_MODULE = require.resolve('phantomjs')
+const PHANTOMJS_BIN = path.resolve(PHANTOMJS_MODULE, '../../bin', 'phantomjs')
+
+
+module.exports = {
+  blocks: {
+    mermaid: {
+      process: function(block) {
+        var body = block.body;
+
+        var src = block.kwargs.src;
+        if(src) {
+          var relativeSrcPath = url.resolve(this.ctx.file.path, src)
+          var absoluteSrcPath = decodeURI(path.resolve(this.book.root, relativeSrcPath))
+          body = readFileSync(absoluteSrcPath, 'utf8')
+        }
+
+        return processBlock(body);
+      }
+    }
+  }
+};
+
+function processBlock(body) {
+  return convertToSvg(body)
+      .then(function (svgCode) {
+          return svgCode.replace(/mermaidChart1/g, getId());
+      });
+}
+
+function convertToSvg(mermaidCode) {
+  var deferred = Q.defer();
+  phantom.create({binary: PHANTOMJS_BIN}, function (ph) {
+    ph.createPage(function (page) {
+
+      var htmlPagePath = path.join(__dirname, 'convert/converter.html');
+
+      page.open(htmlPagePath, function (status) {
+        page.evaluate(
+          function (code) {
+            return renderToSvg(code);
+          },
+          function (result) {
+            ph.exit();
+            deferred.resolve(result);
+          },
+          mermaidCode);
+      });
+    });
+  });
+
+  return deferred.promise;
+}
+
+function getId() {
+  function s4() {
+    return Math.floor((1 + Math.random()) * 0x10000)
+      .toString(16)
+      .substring(1);
+  }
+  return "mermaidChart-" + s4() + s4();
+}