From 3fc5d1fabd5bfe1c6b22b37ce099b126fba803d8 Mon Sep 17 00:00:00 2001
From: Nicolas Stepien <mayhemydg@gmail.com>
Date: Thu, 27 Oct 2011 23:59:08 +0200
Subject: [PATCH] do not preload images automatically, close #188

---
 4chan_x.user.js | 52 ++++++++++++++++++++++++++++++++++++++-----------
 changelog       |  5 +++--
 script.coffee   | 31 +++++++++++++++++++++++------
 3 files changed, 69 insertions(+), 19 deletions(-)

diff --git a/4chan_x.user.js b/4chan_x.user.js
index aa559b9c5..cedc46ccd 100644
--- a/4chan_x.user.js
+++ b/4chan_x.user.js
@@ -2775,15 +2775,45 @@
   };
   imgPreloading = {
     init: function() {
-      return g.callbacks.push(function(root) {
-        var el, src, thumb;
-        if (!(thumb = $('img[md5]', root))) {
-          return;
-        }
-        src = thumb.parentNode.href;
-        return el = $.el('img', {
-          src: src
+      var controls, form, label;
+      if (!(controls = $.id('imgControls'))) {
+        controls = $.el('div', {
+          id: 'imgControls'
         });
+        form = $('body > form');
+        $.prepend(form, controls);
+      }
+      label = $.el('label', {
+        innerHTML: 'Preload Images<input type=checkbox id=imagePreload>'
+      });
+      $.bind($('input', label), 'click', imgPreloading.click);
+      $.add(controls, label);
+      return g.callbacks.push(imgPreloading.node);
+    },
+    click: function() {
+      var thumb, _i, _len, _ref, _results;
+      if (imgPreloading.on = this.checked) {
+        _ref = $$('img[md5]:last-child');
+        _results = [];
+        for (_i = 0, _len = _ref.length; _i < _len; _i++) {
+          thumb = _ref[_i];
+          _results.push(imgPreloading.preload(thumb));
+        }
+        return _results;
+      }
+    },
+    node: function(root) {
+      var thumb;
+      if (!(imgPreloading.on && (thumb = $('img[md5]:last-child', root)))) {
+        return;
+      }
+      return imgPreloading.preload(thumb);
+    },
+    preload: function(thumb) {
+      var el, src;
+      src = thumb.parentNode.href;
+      return el = $.el('img', {
+        src: src
       });
     }
   };
@@ -2916,7 +2946,7 @@
       }
     },
     dialog: function() {
-      var controls, delform, imageType, option, select, _i, _len, _ref;
+      var controls, form, imageType, option, select, _i, _len, _ref;
       controls = $.el('div', {
         id: 'imgControls',
         innerHTML: "<select id=imageType name=imageType><option>full</option><option>fit width</option><option>fit height</option><option>fit screen</option></select>        <label>Expand Images<input type=checkbox id=imageExpand></label>"
@@ -2935,8 +2965,8 @@
       $.bind(select, 'change', $.cb.value);
       $.bind(select, 'change', imgExpand.cb.typeChange);
       $.bind($('input', controls), 'click', imgExpand.cb.all);
-      delform = $('form[name=delform]');
-      return $.prepend(delform, controls);
+      form = $('body > form');
+      return $.prepend(form, controls);
     },
     resize: function(e) {
       return imgExpand.style.innerHTML = ".fitheight img[md5] + img {max-height:" + d.body.clientHeight + "px;}";
diff --git a/changelog b/changelog
index 7863bc30c..50be5269a 100644
--- a/changelog
+++ b/changelog
@@ -1,11 +1,12 @@
 master
 - mayhem
   initiate 4chan X earlier
+  performance improvements
+  regular expressions based filter
+  do not preload images automatically
   automatically reload expanded pictures on error
   update archives redirections for /diy/, /pol/ and /sci/
-  regular expressions based filter
   handle bans with the thread updater
-  performance improvements
 - aeosynth
   quick reply redesign
 
diff --git a/script.coffee b/script.coffee
index eca173d15..5042c5fe4 100644
--- a/script.coffee
+++ b/script.coffee
@@ -2044,10 +2044,29 @@ imgHover =
 
 imgPreloading =
   init: ->
-    g.callbacks.push (root) ->
-      return unless thumb = $ 'img[md5]', root
-      src = thumb.parentNode.href
-      el = $.el 'img', { src }
+    unless controls = $.id 'imgControls'
+      controls = $.el 'div',
+        id: 'imgControls'
+      form = $ 'body > form'
+      $.prepend form, controls
+
+    label = $.el 'label',
+      innerHTML: 'Preload Images<input type=checkbox id=imagePreload>'
+    $.bind $('input', label), 'click', imgPreloading.click
+    $.add controls, label
+
+    g.callbacks.push imgPreloading.node
+
+  click: ->
+    if imgPreloading.on = @checked
+      for thumb in $$ 'img[md5]:last-child'
+        imgPreloading.preload thumb
+  node: (root) ->
+    return unless imgPreloading.on and thumb = $ 'img[md5]:last-child', root
+    imgPreloading.preload thumb
+  preload: (thumb) ->
+    src = thumb.parentNode.href
+    el = $.el 'img', { src }
 
 imgGif =
   init: ->
@@ -2147,8 +2166,8 @@ imgExpand =
     $.bind select, 'change', imgExpand.cb.typeChange
     $.bind $('input', controls), 'click', imgExpand.cb.all
 
-    delform = $ 'form[name=delform]'
-    $.prepend delform, controls
+    form = $ 'body > form'
+    $.prepend form, controls
 
   resize: (e) ->
     imgExpand.style.innerHTML = ".fitheight img[md5] + img {max-height:#{d.body.clientHeight}px;}"