Use shift+click to remove the selected file. Close #281.

4chan_x.user.js

@@ -1602,6 +1602,15 @@
         return img.src = fileUrl;
       };
 
+      _Class.prototype.rmFile = function() {
+        qr.resetFileInput();
+        delete this.file;
+        this.el.title = null;
+        this.el.style.backgroundImage = null;
+        if (qr.spoiler) $('label', this.el).hidden = true;
+        return (window.URL || window.webkitURL).revokeObjectURL(this.url);
+      };
+
       _Class.prototype.select = function() {
         var data, rectEl, rectList, _i, _len, _ref, _ref2;
         if ((_ref = qr.selected) != null) _ref.el.id = null;
@@ -1760,7 +1769,7 @@
   <div><textarea name=com title=Comment placeholder=Comment class=field></textarea></div>\
   <div class=captcha title=Reload><img></div>\
   <div><input title=Verification class=field autocomplete=off size=1></div>\
-  <div><input type=file multiple size=16><input type=submit></div>\
+  <div><input type=file title="Shift+Click to remove the selected file." multiple size=16><input type=submit></div>\
   <label id=spoilerLabel><input type=checkbox id=spoiler> Spoiler Image</label>\
   <div class=warning></div>\
 </form>');
@@ -1816,6 +1825,9 @@
         return qr.selected.el.lastChild.textContent = this.value;
       });
       $.on(fileInput, 'change', qr.fileInput);
+      $.on(fileInput, 'click', function(e) {
+        if (e.shiftKey) return qr.selected.rmFile() || e.preventDefault();
+      });
       $.on(spoiler.firstChild, 'change', function() {
         return $('input', qr.selected.el).click();
       });

changelog

@@ -3,7 +3,8 @@ master
   General performance improvements.
   Threads will now be updated instantly after posting through the QR.
   Your own posts will not count toward the unread count after posting through the QR.
-  QR thumbnails of high-res pictures will not slow down anymore.
+  Performance issues are now lessened with QR thumbnails of high-res pictures.
+  You can now use Shift+Click on the file input to remove the selected reply's file.
   Reply navigation keybinds will now scroll as you navigate.
 - noface
   Add unique ID to filter.

script.coffee

@@ -1327,6 +1327,13 @@ qr =
         url.revokeObjectURL fileUrl
 
       img.src = fileUrl
+    rmFile: ->
+      qr.resetFileInput()
+      delete @file
+      @el.title = null
+      @el.style.backgroundImage = null
+      $('label', @el).hidden = true if qr.spoiler
+      (window.URL or window.webkitURL).revokeObjectURL @url
     select: ->
       qr.selected?.el.id = null
       qr.selected = @
@@ -1442,7 +1449,7 @@ qr =
   <div><textarea name=com title=Comment placeholder=Comment class=field></textarea></div>
   <div class=captcha title=Reload><img></div>
   <div><input title=Verification class=field autocomplete=off size=1></div>
-  <div><input type=file multiple size=16><input type=submit></div>
+  <div><input type=file title="Shift+Click to remove the selected file." multiple size=16><input type=submit></div>
   <label id=spoilerLabel><input type=checkbox id=spoiler> Spoiler Image</label>
   <div class=warning></div>
 </form>'
@@ -1488,6 +1495,7 @@ qr =
     $.on $('form',      qr.el), 'submit',    qr.submit
     $.on $('textarea',  qr.el), 'keyup',     -> qr.selected.el.lastChild.textContent = @value
     $.on fileInput,             'change',    qr.fileInput
+    $.on fileInput,             'click',     (e) -> if e.shiftKey then qr.selected.rmFile() or e.preventDefault()
     $.on spoiler.firstChild,    'change',    -> $('input', qr.selected.el).click()
     $.on $('.warning',  qr.el), 'click',     qr.cleanError