Generate images using data URIs

1 files changed, 38 insertions, 12 deletions

diff --git a/lib/document-to-html.js b/lib/document-to-html.js
index 1224878..b9efe0d 100644
--- a/lib/document-to-html.js
+++ b/lib/document-to-html.js
@@ -15,24 +15,28 @@ function DocumentConverter(options) {
     
     function convertToHtml(document) {
         var html = new HtmlGenerator();
-        elementToHtml(document, html);
-        html.closeAll();
-        
-        return q.when({
-            html: html.asString()
-        }); 
+        return elementToHtml(document, html)
+            .then(function() {
+                html.closeAll();
+                
+                return {
+                    html: html.asString()
+                }; 
+            });
     }
     
     function convertElements(elements, html) {
-        elements.forEach(function(element) {
-            elementToHtml(element, html);
+        return forEachPromise(elements, function(element) {
+            return elementToHtml(element, html);
         });
     }
 
     function elementToHtml(element, html) {
         var handler = elementConverters[element.type];
         if (handler) {
-            handler(element, html);
+            return q.when(handler(element, html));
+        } else {
+            return q.when();
         }
     }
     
@@ -66,7 +70,7 @@ function DocumentConverter(options) {
 
     var elementConverters = {
         "document": function(document, html) {
-            convertElements(document.children, html);
+            return convertElements(document.children, html);
         },
         "paragraph": convertParagraph,
         "run": convertRun,
@@ -75,11 +79,33 @@ function DocumentConverter(options) {
         },
         "hyperlink": function(element, html) {
             html.push(styles.element("a", {href: element.href}));
-            convertElements(element.children, html);
-            html.pop();
+            return convertElements(element.children, html).then(function() {
+                html.pop();
+            });
+        },
+        "image": function(element, html) {
+            return element.read().then(function(imageBuffer) {
+                var src = "data:image/png;base64," + imageBuffer.toString("base64");
+                html.selfClosing(styles.element("img", {"src": src}))
+            });
         }
     };
     return {
         convertToHtml: convertToHtml
     }
 }
+
+function forEachPromise(array, func) {
+    var index = -1;
+    return next();
+    
+    function next() {
+        index++;
+        if (index < array.length) {
+            return q.when(func(array[index]))
+                .then(next);
+        } else {
+            return q.when();
+        }
+    }
+}