Allow functions for the exporting.filename configuration option (#5)

README.md

@@ -43,10 +43,15 @@ The only dependencies you must use are HighCharts and HighCharts exporting modul
 
 ## Changelog
 
+### v1.1.1 – 2015-07-03
+
+* Allow functions for the `exporting.filename` configuration option (#5)
+
 ### v1.1.0 – 2015-07-03
 
+Should have been done months ago, sorry.
 IE9 and below will not be supported in a near future and possibly any kind of future. Look at #4 for discussion on this matter.
-* Async rendering, fixes issues when chart includes resources (icons and the likes, #2)
+* Async rendering, fixes issues when chart includes resources (icons and the likes, #1)
 * Documentation fixes (#2)
 
 ### v1.0.1 – 2015-04-27

bower.json

@@ -1,7 +1,7 @@
 {
   "name": "highcharts-export-clientside",
   "main": "highcharts-export-clientside.js",
-  "version": "1.1.0",
+  "version": "1.1.1",
   "homepage": "https://github.com/A----/highcharts-export-clientside",
   "authors": [
     "A---- <A----@users.noreply.github.com>"

highcharts-export-clientside.js

@@ -62,6 +62,15 @@
    */
   H.exporting.MIME_TYPES = MIME_TYPES;
 
+  /**
+   * Little helper function that you can set to the `filename` configuration
+   * option to use the chart title for the filename when downloaded.
+   */
+  H.exporting.USE_TITLE_FOR_FILENAME = function(options, chartOptions) {
+    var title = this.chart.title ? chart.title.textStr.replace(/ /g, '-').toLowerCase() : 'chart';
+    return title;
+  };
+
   var supportStatus = {};
   var buildSupportStatus = function() {
     var hasDownloadOrBlob = browserSupportDownload || browserSupportBlob;
@@ -445,10 +454,17 @@
     }
 
     context.type = type;
-    context.filename = opt.get("filename") + MIME_TYPE_TO_EXTENSION[type];
     context.browserSupportDownload = browserSupportDownload;
     context.browserSupportBlob = browserSupportBlob;
 
+    var filename = opt.get("filename");
+    if(typeof filename === "function") {
+      context.filename = filename.bind(this)(options, chartOptions) + MIME_TYPE_TO_EXTENSION[type];
+    }
+    else {
+      context.filename = opt.get("filename") + MIME_TYPE_TO_EXTENSION[type];
+    }
+
     steps.rendering[type].render(highChartsObject, context, function(data) {
       if(steps.rendering[type].postRender) {
         steps.rendering[type].postRender(highChartsObject, context);

manifest.json

@@ -1,6 +1,6 @@
 {
   "name": "highcharts-export-clientside",
-  "version": "1.1.0",
+  "version": "1.1.1",
   "title": "Highcharts Client-Side Export Module",
   "author": {
     "name": "A----",