Add support of embed pdf

bower.json

@@ -55,7 +55,8 @@
     "list.js": "^1.2.0",
     "store-js": "store.js#^1.3.20",
     "string": "^3.3.1",
-    "visibilityjs": "^1.2.3"
+    "visibilityjs": "^1.2.3",
+    "pdfobject": "pdfobject2#*"
   },
   "resolutions": {
     "jquery": "~2.2.4"

public/docs/features.md

@@ -186,6 +186,10 @@ alert(s);
 ### Speakerdeck
 {%speakerdeck sugarenia/xxlcss-how-to-scale-css-and-keep-your-sanity %}
 
+### PDF
+**Caution: this might be blocked by your browser if not using https url.**
+{%pdf https://papers.nips.cc/paper/5346-sequence-to-sequence-learning-with-neural-networks.pdf %}
+
 ## MathJax
 
 You can render *LaTeX* mathematical expressions using **MathJax**, as on [math.stackexchange.com](http://math.stackexchange.com/):

public/js/extra.js

@@ -83,6 +83,20 @@ function slugifyWithUTF8(text) {
     return newText;
 }
 
+function isValidURL(str) {
+    var pattern = new RegExp('^(https?:\\/\\/)?' + // protocol
+        '((([a-z\\d]([a-z\\d-]*[a-z\\d])*)\\.)+[a-z]{2,}|' + // domain name
+        '((\\d{1,3}\\.){3}\\d{1,3}))' + // OR ip (v4) address
+        '(\\:\\d+)?(\\/[-a-z\\d%_.~+]*)*' + // port and path
+        '(\\?[;&a-z\\d%_.~+=-]*)?' + // query string
+        '(\\#[-a-z\\d_]*)?$', 'i'); // fragment locator
+    if (!pattern.test(str)) {
+        return false;
+    } else {
+        return true;
+    }
+}
+
 //parse meta
 function parseMeta(md, edit, view, toc, tocAffix) {
     var lang = null;
@@ -403,6 +417,16 @@ function finishView(view) {
                 }
             });
         });
+    //pdf
+    view.find(".pdf.raw").removeClass("raw")
+        .each(function (key, value) {
+            var url = $(value).attr('data-pdfurl');
+            var inner = $('<div></div>');
+            $(this).append(inner);
+            PDFObject.embed(url, inner, {
+                height: '400px'
+            });
+        });
     //render title
     document.title = renderTitle(view);
 }
@@ -901,6 +925,20 @@ var speakerdeckPlugin = new Plugin(
         return div[0].outerHTML;
     }
 );
+//pdf
+var pdfPlugin = new Plugin(
+    // regexp to match
+    /{%pdf\s*([\d\D]*?)\s*%}/,
+
+    // this function will be called when something matches
+    function (match, utils) {
+        var pdfurl = match[1];
+        if (!isValidURL(pdfurl)) return match[0];
+        var div = $('<div class="pdf raw"></div>');
+        div.attr('data-pdfurl', pdfurl);
+        return div[0].outerHTML;
+    }
+);
 
 //yaml meta, from https://github.com/eugeneware/remarkable-meta
 function get(state, line) {
@@ -950,3 +988,4 @@ md.use(gistPlugin);
 md.use(tocPlugin);
 md.use(slidesharePlugin);
 md.use(speakerdeckPlugin);
+md.use(pdfPlugin);

public/js/index.js

@@ -152,6 +152,10 @@ var supportExternals = [
     {
         text: '{%speakerdeck speakerdeckid %}',
         search: 'speakerdeck'
+    },
+    {
+        text: '{%pdf pdfurl %}',
+        search: 'pdf'
     }
 ];
 var supportExtraTags = [
@@ -1836,20 +1840,6 @@ function importFromUrl(url) {
     });
 }
 
-function isValidURL(str) {
-    var pattern = new RegExp('^(https?:\\/\\/)?' + // protocol
-        '((([a-z\\d]([a-z\\d-]*[a-z\\d])*)\\.)+[a-z]{2,}|' + // domain name
-        '((\\d{1,3}\\.){3}\\d{1,3}))' + // OR ip (v4) address
-        '(\\:\\d+)?(\\/[-a-z\\d%_.~+]*)*' + // port and path
-        '(\\?[;&a-z\\d%_.~+=-]*)?' + // query string
-        '(\\#[-a-z\\d_]*)?$', 'i'); // fragment locator
-    if (!pattern.test(str)) {
-        return false;
-    } else {
-        return true;
-    }
-}
-
 //mode
 ui.toolbar.mode.click(function () {
     toggleMode();

public/views/foot.ejs

@@ -59,6 +59,7 @@
 <script src="<%- url %>/vendor/sequence-diagrams/sequence-diagram-min.js" defer></script>
 <script src="<%- url %>/vendor/flowchart/release/flowchart.min.js" defer></script>
 <script src="<%- url %>/vendor/viz.js/viz.js" defer></script>
+<script src="<%- url %>/vendor/pdfobject/pdfobject.min.js" defer></script>
 <script src="<%- url %>/vendor/file-saver/FileSaver.min.js" defer></script>
 <script src="<%- url %>/vendor/store-js/store.min.js" defer></script>
 <script src="<%- url %>/vendor/js-url/url.min.js" defer></script>

public/views/pretty.ejs

@@ -116,6 +116,7 @@
 <script src="<%- url %>/vendor/sequence-diagrams/sequence-diagram-min.js" defer></script>
 <script src="<%- url %>/vendor/flowchart/release/flowchart.min.js" defer></script>
 <script src="<%- url %>/vendor/viz.js/viz.js" defer></script>
+<script src="<%- url %>/vendor/pdfobject/pdfobject.min.js" defer></script>
 <script src="<%- url %>/vendor/md-toc.js" defer></script>
 <script src="<%- url %>/js/common.js" defer></script>
 <script src="<%- url %>/js/extra.js" defer></script>