Improve scrolling

We now replace native scrollbar by custom ones on the list card (which
is required by the new ergonomics in the parent commit), but the
"scrolling engine", is still native, we just hide the scrollbar and
draw our own in HTML/CSS using the perfect-scrollbar package (from
bower).

This commit also implements component scrolling when certain actions
are performed, eg scroll to the bottom when the new card composer is
opened.

client/components/lists/body.jade

@@ -1,43 +1,44 @@
 template(name="listBody")
-  .minicards.clearfix.js-minicards
-    if cards.count
-      +inlinedForm(autoclose=false position="top")
-        +addCardForm(listId=_id position="top")
-    each cards
-      .minicard.card.js-minicard(
-        class="{{#if isSelected}}is-selected{{/if}}")
-        a.minicard-details.clearfix.show(href=absoluteUrl)
-          if cover
-            .minicard-cover.js-card-cover(style="background-image: url({{cover.url}});")
-          if labels
-            .minicard-labels
-              each labels
-                .minicard-label(class="card-label-{{color}}" title="{{name}}")
-          .minicard-title= title
-          if members
-            .minicard-members.js-minicard-members
-              each members
-                +userAvatar(userId=this size="small" cardId="{{../_id}}")
-          .badges
-            if comments.count
-              .badge(title="{{_ 'card-comments-title' comments.count }}")
-                span.badge-icon.icon-sm.fa.fa-comment-o
-                .badge-text= comments.count
-            if description
-              .badge.badge-state-image-only(title=description)
-                span.badge-icon.icon-sm.fa.fa-align-left
-            if attachments.count
-              .badge
-                span.badge-icon.icon-sm.fa.fa-paperclip
-                span.badge-text= attachments.count
-    if currentUser.isBoardMember
-      +inlinedForm(autoclose=false position="bottom")
-        +addCardForm(listId=_id position="bottom")
-      else
-        if newCardFormIsVisible.get
-          a.open-card-composer.js-open-inlined-form
-            i.fa.fa-plus
-            | {{_ 'add-card'}}
+  .list-body.js-perfect-scrollbar
+    .minicards.clearfix.js-minicards
+      if cards.count
+        +inlinedForm(autoclose=false position="top")
+          +addCardForm(listId=_id position="top")
+      each cards
+        .minicard.card.js-minicard(
+          class="{{#if isSelected}}is-selected{{/if}}")
+          a.minicard-details.clearfix.show(href=absoluteUrl)
+            if cover
+              .minicard-cover.js-card-cover(style="background-image: url({{cover.url}});")
+            if labels
+              .minicard-labels
+                each labels
+                  .minicard-label(class="card-label-{{color}}" title="{{name}}")
+            .minicard-title= title
+            if members
+              .minicard-members.js-minicard-members
+                each members
+                  +userAvatar(userId=this size="small" cardId="{{../_id}}")
+            .badges
+              if comments.count
+                .badge(title="{{_ 'card-comments-title' comments.count }}")
+                  span.badge-icon.icon-sm.fa.fa-comment-o
+                  .badge-text= comments.count
+              if description
+                .badge.badge-state-image-only(title=description)
+                  span.badge-icon.icon-sm.fa.fa-align-left
+              if attachments.count
+                .badge
+                  span.badge-icon.icon-sm.fa.fa-paperclip
+                  span.badge-text= attachments.count
+      if currentUser.isBoardMember
+        +inlinedForm(autoclose=false position="bottom")
+          +addCardForm(listId=_id position="bottom")
+        else
+          if newCardFormIsVisible.get
+            a.open-card-composer.js-open-inlined-form
+              i.fa.fa-plus
+              | {{_ 'add-card'}}
 
 template(name="addCardForm")
   .minicard.js-composer

client/components/lists/body.js

@@ -3,6 +3,10 @@ BlazeComponent.extendComponent({
     return 'listBody';
   },
 
+  mixins: function() {
+    return [Mixins.PerfectScrollbar];
+  },
+
   isSelected: function() {
     return Session.equals('currentCard', this.currentData()._id);
   },
@@ -62,13 +66,21 @@ BlazeComponent.extendComponent({
     this.newCardFormIsVisible.set(value);
   },
 
+  scrollToBottom: function() {
+    var $container = $(this.firstNode());
+    $container.animate({
+      scrollTop: $container.height()
+    });
+  },
+
   onCreated: function() {
     this.newCardFormIsVisible = new ReactiveVar(true);
   },
 
   events: function() {
     return [{
-      submit: this.addCard
+      submit: this.addCard,
+      'click .open-card-composer': this.scrollToBottom
     }];
   }
 }).register('listBody');

client/components/lists/main.jade

@@ -1,5 +1,4 @@
 template(name='list')
   .list.js-list(id="js-list-{{_id}}")
-    .list-wrapper
-      +listHeader
-      +listBody
+    +listHeader
+    +listBody

client/components/lists/main.js

@@ -19,9 +19,10 @@ BlazeComponent.extendComponent({
   // XXX The jQuery UI sortable plugin is far from ideal here. First we include
   // all jQuery components but only use one. Second, it modifies the DOM itself,
   // resulting in Blaze abandoning reactive update of the nodes that have been
-  // moved which result in bugs if multiple users use the board in real time.
-  // I tried sortable:sortable but that was not better. Should we “simply” write
-  // the drag&drop code ourselves?
+  // moved which result in bugs if multiple users use the board in real time. I
+  // tried sortable:sortable but that was not better. And dragula is not
+  // powerful enough for our use casesShould we “simply” write the drag&drop
+  // code ourselves?
   onRendered: function() {
     if (Meteor.user().isBoardMember()) {
       var boardComponent = this.componentParent();

client/components/lists/main.styl

@@ -11,8 +11,7 @@
   background: darken(white, 10%)
   height: 100%
   border-left: 1px solid darken(white, 20%)
-  padding: 12px 7px 5px
-  overflow-y: auto
+  padding: 0
 
   &:first-child
     margin-left: 5px
@@ -21,15 +20,20 @@
   .card-detail + &
     border-left: none
 
-  &.editable
-    cursor: grab
+  &.ui-sortable-helper
+    cursor: grabbing
+    box-shadow: -2px 2px 8px rgba(0, 0, 0, .3),
+                0 0 1px rgba(0, 0, 0, .5)
+    transform: rotate(4deg)
 
-    .list-wrapper
-      cursor: default
+  &.placeholder
+    background-color: rgba(0, 0, 0, .2)
+    border-color: transparent
+    box-shadow: none
+    height: 100px
 
-  &.add-list
-    &.fade
-      opacity: 0
+  &.list-composer
+    padding: 17px
 
     .list-name-input
       background: rgba(0, 0, 0, .05)
@@ -55,7 +59,7 @@
 
 .list-header
   flex: 0 0 auto
-  padding: 10px 26px 4px 6px
+  margin: 20px 15px 4px
   position: relative
   min-height: 20px
 
@@ -74,24 +78,23 @@
   .list-header-menu-icon
     background-clip: content-box
     background-origin: content-box
-    padding: 6px 8px
+    // padding: 6px 8px
     position: absolute
-    top: 3px
-    right: -5px
+    top: 0
+    right: 0
     color: #a6a6a6
 
   .list-header-num-cards
     color: #8c8c8c
     margin: 0
 
-.minicards
-  padding: 4px 4px 1px
-  z-index: 1
-  height: 100%
+.list-body
+  flex: 1
+  overflow-y: auto
+  padding: 5px 11px
 
-  &::-webkit-scrollbar-button
-    display: block
-    height: 4px
+  .ps-scrollbar-y-rail
+    transform: translateX(2px)
 
 .open-card-composer
   border-radius: 2px
@@ -100,6 +103,7 @@
   padding: 7px 10px
   position: relative
   text-decoration: none
+  animation: fadeIn 0.3s
 
   i.fa
     margin-right: 7px
@@ -117,18 +121,3 @@
     opacity: 0
   to
     opacity: 1
-
-.list.placeholder
-  background-color: rgba(0, 0, 0, .2)
-  border-color: transparent
-  box-shadow: none
-  height: 100px
-
-.list.ui-sortable-helper
-  cursor: grabbing
-  box-shadow: -2px 2px 8px rgba(0, 0, 0, .3), 0 0 1px rgba(0, 0, 0, .5)
-  transform: rotate(4deg)
-
-
-.list.ui-sortable-helper .list-header-menu-icon
-  display: none