Move document conversion into document-to-html module

1 files changed, 80 insertions, 0 deletions

diff --git a/lib/document-to-html.js b/lib/document-to-html.js
new file mode 100644
index 0000000..caccb6f
--- /dev/null
+++ b/lib/document-to-html.js
@@ -0,0 +1,80 @@
+var q = require("q");
+
+var styles = require("./styles");
+var HtmlGenerator = require("./html-generator").HtmlGenerator;
+
+exports.DocumentConverter = DocumentConverter;
+
+
+function DocumentConverter(options) {
+    options = options || {};
+    var defaultParagraphStyle = options.defaultParagraphStyle || styles.topLevelElement("p");
+    
+    var paragraphStyleMap = options.paragraphStyleMap || {};
+    var runStyleMap = options.runStyleMap || {};
+    
+    function convertToHtml(document) {
+        var html = new HtmlGenerator();
+        elementToHtml(document, html);
+        html.closeAll();
+        
+        return q.when({
+            html: html.asString()
+        }); 
+    }
+    
+    function convertElements(elements, html) {
+        elements.forEach(function(element) {
+            elementToHtml(element, html);
+        });
+    }
+
+    function elementToHtml(element, html) {
+        var handler = elementConverters[element.type];
+        if (handler) {
+            handler(element, html);
+        }
+    }
+    
+    function convertParagraph(element, html) {
+        html.style(styleForParagraph(element));
+        convertElements(element.children, html);
+    }
+    
+    function styleForParagraph(element) {
+        return paragraphStyleMap[element.properties.styleName] || defaultParagraphStyle;
+    }
+    
+    function convertRun(run, html) {
+        var runHtml = new HtmlGenerator();
+        if (run.properties.styleName) {
+            var style = runStyleMap[run.properties.styleName];
+            if (style) {
+                runHtml.style(style);
+            }
+        }
+        if (run.properties.isBold) {
+            runHtml.push(styles.element("strong"));
+        }
+        if (run.properties.isItalic) {
+            runHtml.push(styles.element("em"));
+        }
+        convertElements(run.children, runHtml);
+        runHtml.closeAll();
+        html.append(runHtml);
+    }
+
+    var elementConverters = {
+        "document": function(document, html) {
+            convertElements(document.children, html);
+        },
+        "paragraph": convertParagraph,
+        "run": convertRun,
+        "text": function(element, html) {
+            html.text(element.value);
+        }
+    };
+    return {
+        convertToHtml: convertToHtml
+    }
+}