Add option pdf.pageNumber

Fix GitbookIO/editor#38

README.md

@@ -106,6 +106,9 @@ Here are the options that can be stored in this file:
         // Add toc at the end of the file
         "toc": true,
 
+        // Add page numbers to the bottom of every page
+        "pageNumbers": false,
+
         // Font size for the fiel content
         "fontSize": 12,
 

lib/generate/ebook/index.js

@@ -44,6 +44,7 @@ Generator.prototype.finish = function() {
             var pdfOptions = _.defaults(that.options.pdf || {}, {
                 "fontSize": 12,
                 "toc": true,
+                "pageNumbers": false,
                 "paperSize": "a4",
                 "margin": {
                     "right": 62,
@@ -61,6 +62,7 @@ Generator.prototype.finish = function() {
                 "--pdf-add-toc": Boolean(pdfOptions.toc),
                 "--pdf-default-font-size": String(pdfOptions.fontSize),
                 "--paper-size": String(pdfOptions.paperSize),
+                "--pdf-page-numbers": Boolean(pdfOptions.pageNumbers)
             });
         }
 

lib/utils/string.js

@@ -11,7 +11,7 @@ function escapeShellArg(arg) {
 function optionsToShellArgs(options) {
     return _.chain(options)
     .map(function(value, key) {
-        if (value == null) return null;
+        if (value == null || value == false) return null;
         if (value == true) return key;
         return key+"="+escapeShellArg(value);
     })