From 08e104f0fa47ca9faf9df83adc0e61b44102c92b Mon Sep 17 00:00:00 2001
From: Nicolas Stepien <stepien.nicolas@gmail.com>
Date: Thu, 28 Jun 2012 21:01:56 +0200
Subject: [PATCH] Add a download link to the menu for compatible browsers.
 Close #102.

---
 4chan_x.user.js | 37 ++++++++++++++++++++++++++++++++++---
 script.coffee   | 31 +++++++++++++++++++++++++++++--
 2 files changed, 63 insertions(+), 5 deletions(-)

diff --git a/4chan_x.user.js b/4chan_x.user.js
index 17d614004..1b67152e6 100644
--- a/4chan_x.user.js
+++ b/4chan_x.user.js
@@ -77,7 +77,7 @@
  */
 
 (function() {
-  var $, $$, Anonymize, ArchiveLink, AutoGif, Conf, Config, DeleteLink, ExpandComment, ExpandThread, Favicon, FileInfo, Filter, Get, ImageExpand, ImageHover, Keybinds, Main, Menu, Nav, Options, QR, QuoteBacklink, QuoteCT, QuoteInline, QuoteOP, QuotePreview, Quotify, Redirect, ReplyHiding, ReportLink, RevealSpoilers, Sauce, StrikethroughQuotes, ThreadHiding, ThreadStats, Time, TitlePost, UI, Unread, Updater, Watcher, d, g, _base;
+  var $, $$, Anonymize, ArchiveLink, AutoGif, Conf, Config, DeleteLink, DownloadLink, ExpandComment, ExpandThread, Favicon, FileInfo, Filter, Get, ImageExpand, ImageHover, Keybinds, Main, Menu, Nav, Options, QR, QuoteBacklink, QuoteCT, QuoteInline, QuoteOP, QuotePreview, Quotify, Redirect, ReplyHiding, ReportLink, RevealSpoilers, Sauce, StrikethroughQuotes, ThreadHiding, ThreadStats, Time, TitlePost, UI, Unread, Updater, Watcher, d, g, _base;
 
   Config = {
     main: {
@@ -112,7 +112,8 @@
         'Menu': [true, 'Add a drop-down menu in posts.'],
         'Report Link': [true, 'Add a report link to the menu.'],
         'Delete Link': [true, 'Add a delete link to the menu.'],
-        'Archive Link': [true, 'Add a archive link to the menu.']
+        'Download Link': [true, 'Add a download with original filename link to the menu. Chrome-only currently.'],
+        'Archive Link': [true, 'Add an archive link to the menu.']
       },
       Monitoring: {
         'Thread Updater': [true, 'Update threads. Has more options in its own dialog.'],
@@ -3203,6 +3204,7 @@
         fullname: span.title,
         shortname: span.textContent
       };
+      node.setAttribute('data-filename', span.title);
       return node.innerHTML = FileInfo.funk(FileInfo);
     },
     setFormats: function() {
@@ -3996,6 +3998,31 @@
     }
   };
 
+  DownloadLink = {
+    init: function() {
+      var a;
+      if ($.el('a').download === void 0) {
+        return;
+      }
+      a = $.el('a', {
+        className: 'download_link',
+        textContent: 'Download file'
+      });
+      return Menu.addEntry({
+        el: a,
+        open: function(post) {
+          var fileText;
+          a.href = post.img.parentNode.href;
+          fileText = post.fileInfo.firstElementChild;
+          return a.download = Conf['File Info Formatting'] ? fileText.dataset.filename : $('span', fileText).title;
+        },
+        requirement: function(post) {
+          return post.img;
+        }
+      });
+    }
+  };
+
   ArchiveLink = {
     init: function() {
       var a;
@@ -4675,6 +4702,9 @@
         if (Conf['Delete Link']) {
           DeleteLink.init();
         }
+        if (Conf['Download Link']) {
+          DownloadLink.init();
+        }
         if (Conf['Archive Link']) {
           ArchiveLink.init();
         }
@@ -4949,7 +4979,8 @@ a[href="javascript:;"] {\
   border-bottom: 1px solid rgba(0, 0, 0, .25);\
   display: block;\
   outline: none;\
-  padding: 3px 4px;\
+  padding: 3px 7px;\
+  text-decoration: none;\
 }\
 .entry:last-child {\
   border: none;\
diff --git a/script.coffee b/script.coffee
index f3b4084e2..8ed4fff4a 100644
--- a/script.coffee
+++ b/script.coffee
@@ -28,7 +28,8 @@ Config =
       'Menu':                         [true,  'Add a drop-down menu in posts.']
       'Report Link':                  [true,  'Add a report link to the menu.']
       'Delete Link':                  [true,  'Add a delete link to the menu.']
-      'Archive Link':                 [true,  'Add a archive link to the menu.']
+      'Download Link':                [true,  'Add a download with original filename link to the menu. Chrome-only currently.']
+      'Archive Link':                 [true,  'Add an archive link to the menu.']
     Monitoring:
       'Thread Updater':               [true,  'Update threads. Has more options in its own dialog.']
       'Unread Count':                 [true,  'Show unread post count in tab title']
@@ -2497,6 +2498,8 @@ FileInfo =
       resolution: span.previousSibling.textContent.match(/\d+x\d+|PDF/)[0]
       fullname:   span.title
       shortname:  span.textContent
+    # XXX GM/Scriptish
+    node.setAttribute 'data-filename', span.title
     node.innerHTML = FileInfo.funk FileInfo
   setFormats: ->
     code = Conf['fileInfo'].replace /%([BKlLMnNprs])/g, (s, c) ->
@@ -3137,6 +3140,26 @@ ReportLink =
     set   = "toolbar=0,scrollbars=0,location=0,status=1,menubar=0,resizable=1,width=685,height=200"
     window.open url, id, set
 
+DownloadLink =
+  init: ->
+    # Test for download feature support.
+    return if $.el('a').download is undefined
+    a = $.el 'a',
+      className: 'download_link'
+      textContent: 'Download file'
+    Menu.addEntry
+      el: a
+      open: (post) ->
+        a.href     = post.img.parentNode.href
+        fileText   = post.fileInfo.firstElementChild
+        a.download =
+          if Conf['File Info Formatting']
+            fileText.dataset.filename
+          else
+            $('span', fileText).title
+      requirement: (post) ->
+        post.img
+
 ArchiveLink =
   init: ->
     a = $.el 'a',
@@ -3633,6 +3656,9 @@ Main =
       if Conf['Delete Link']
         DeleteLink.init()
 
+      if Conf['Download Link']
+        DownloadLink.init()
+
       if Conf['Archive Link']
         ArchiveLink.init()
 
@@ -3848,7 +3874,8 @@ a[href="javascript:;"] {
   border-bottom: 1px solid rgba(0, 0, 0, .25);
   display: block;
   outline: none;
-  padding: 3px 4px;
+  padding: 3px 7px;
+  text-decoration: none;
 }
 .entry:last-child {
   border: none;