Make workboard columns fixed-height and internally scrollable

Summary:
Ref T5240.

  - Columns are fixed height.
  - Columns scroll internally.
  - Drag behaviors generally align with these column behaviors.

Test Plan: {F1099061}

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T5240

Differential Revision: https://secure.phabricator.com/D15209

resources/celerity/map.php

@@ -8,7 +8,7 @@
 return array(
   'names' => array(
     'core.pkg.css' => 'b4a7e275',
-    'core.pkg.js' => '808ae845',
+    'core.pkg.js' => '771b0e84',
     'darkconsole.pkg.js' => 'e7393ebb',
     'differential.pkg.css' => '2de124c9',
     'differential.pkg.js' => 'd0cd0df6',
@@ -154,7 +154,7 @@ return array(
     'rsrc/css/phui/phui-tag-view.css' => '9d5d4400',
     'rsrc/css/phui/phui-timeline-view.css' => '2efceff8',
     'rsrc/css/phui/phui-two-column-view.css' => 'c75bfc5b',
-    'rsrc/css/phui/workboards/phui-workboard.css' => '2a04b1a8',
+    'rsrc/css/phui/workboards/phui-workboard.css' => 'f526057c',
     'rsrc/css/phui/workboards/phui-workcard.css' => 'a869098a',
     'rsrc/css/phui/workboards/phui-workpanel.css' => 'e1bd8d04',
     'rsrc/css/sprite-login.css' => '60e8560e',
@@ -447,7 +447,7 @@ return array(
     'rsrc/js/application/uiexample/notification-example.js' => '8ce821c5',
     'rsrc/js/core/Busy.js' => '59a7976a',
     'rsrc/js/core/DragAndDropFileUpload.js' => '81f182b5',
-    'rsrc/js/core/DraggableList.js' => '8905523d',
+    'rsrc/js/core/DraggableList.js' => '8199fb41',
     'rsrc/js/core/FileUpload.js' => '680ea2c8',
     'rsrc/js/core/Hovercard.js' => '1bd28176',
     'rsrc/js/core/KeyboardShortcut.js' => '1ae869f2',
@@ -742,7 +742,7 @@ return array(
     'phabricator-countdown-css' => 'e7544472',
     'phabricator-dashboard-css' => 'eb458607',
     'phabricator-drag-and-drop-file-upload' => '81f182b5',
-    'phabricator-draggable-list' => '8905523d',
+    'phabricator-draggable-list' => '8199fb41',
     'phabricator-fatal-config-template-css' => '8e6c6fcd',
     'phabricator-feed-css' => 'ecd4ec57',
     'phabricator-file-upload' => '680ea2c8',
@@ -831,7 +831,7 @@ return array(
     'phui-theme-css' => 'ab7b848c',
     'phui-timeline-view-css' => '2efceff8',
     'phui-two-column-view-css' => 'c75bfc5b',
-    'phui-workboard-view-css' => '2a04b1a8',
+    'phui-workboard-view-css' => 'f526057c',
     'phui-workcard-view-css' => 'a869098a',
     'phui-workpanel-view-css' => 'e1bd8d04',
     'phuix-action-list-view' => 'b5c256b8',
@@ -1451,6 +1451,14 @@ return array(
       'javelin-vector',
       'javelin-stratcom',
     ),
+    '8199fb41' => array(
+      'javelin-install',
+      'javelin-dom',
+      'javelin-stratcom',
+      'javelin-util',
+      'javelin-vector',
+      'javelin-magical-init',
+    ),
     '81f182b5' => array(
       'javelin-install',
       'javelin-util',
@@ -1496,14 +1504,6 @@ return array(
       'javelin-stratcom',
       'javelin-dom',
     ),
-    '8905523d' => array(
-      'javelin-install',
-      'javelin-dom',
-      'javelin-stratcom',
-      'javelin-util',
-      'javelin-vector',
-      'javelin-magical-init',
-    ),
     '8a41885b' => array(
       'javelin-install',
       'javelin-dom',

src/view/phui/PHUIWorkboardView.php

@@ -25,12 +25,13 @@ final class PHUIWorkboardView extends AphrontTagView {
       $view->addColumn($panel);
     }
 
-    $board = phutil_tag(
+    $board = javelin_tag(
       'div',
-        array(
-          'class' => 'phui-workboard-view-shadow',
-        ),
-        $view);
+      array(
+        'class' => 'phui-workboard-view-shadow',
+        'sigil' => 'lock-scroll-while-dragging',
+      ),
+      $view);
 
     return $board;
   }

webroot/rsrc/css/phui/workboards/phui-workboard.css

@@ -12,6 +12,7 @@
 
 .device-desktop .phui-workboard-view-shadow {
   overflow-x: auto;
+  overflow-y: hidden;
   position: absolute;
   top: 79px;
   bottom: 0;
@@ -70,3 +71,9 @@
 .device .project-board-wrapper {
   margin: 16px;
 }
+
+.device-desktop .phui-workpanel-body {
+  max-height: calc(100vh - 170px);
+  overflow-y: scroll;
+  overflow-x: hidden;
+}

webroot/rsrc/js/core/DraggableList.js

@@ -310,6 +310,10 @@ JX.install('DraggableList', {
       return target_list;
     },
 
+    _getTarget: function() {
+      return this._target;
+    },
+
     _setTarget : function(cur_target) {
       var ghost = this.getGhostNode();
       var target = this._target;
@@ -433,8 +437,6 @@ JX.install('DraggableList', {
           this._cursorOrigin.y - (this._cursorScroll.y - s.y));
       }
 
-      this._updateAutoscroll(this._cursorPosition);
-
       var p = JX.$V(this._cursorPosition.x, this._cursorPosition.y);
 
       var group = this._group;
@@ -459,6 +461,8 @@ JX.install('DraggableList', {
         }
       }
 
+      this._updateAutoscroll(this._cursorPosition);
+
       var f = JX.$V(this._frame);
       p.x -= f.x;
       p.y -= f.y;
@@ -475,7 +479,7 @@ JX.install('DraggableList', {
     },
 
     _updateAutoscroll: function(p) {
-      var container = this._dragging.parentNode;
+      var container = this._getScrollAnchor().parentNode;
       var autoscroll = {};
 
       var outer = this.getOuterContainer();
@@ -595,6 +599,22 @@ JX.install('DraggableList', {
       this.invoke('didEndDrag', dragging);
     },
 
+    _getScrollAnchor: function() {
+      // If you drag an item from column "A" into column "B", then move the
+      // mouse to the top or bottom of the screen, we need to scroll the target
+      // column (column "B"), not the original column.
+
+      var group = this._group;
+      for (var ii = 0; ii < group.length; ii++) {
+        var target = group[ii]._getTarget();
+        if (target) {
+          return group[ii]._ghostNode;
+        }
+      }
+
+      return this._dragging;
+    },
+
     _onautoscroll: function() {
       var u = this._autoscroll.up;
       var d = this._autoscroll.down;
@@ -613,20 +633,22 @@ JX.install('DraggableList', {
 
       var amount = 12 * (delta / 10);
 
+      var anchor = this._getScrollAnchor();
+
       if (u && (u != d)) {
-        this._tryScroll(this._dragging, u, 'scrollTop', amount);
+        this._tryScroll(anchor, u, 'scrollTop', amount);
       }
 
       if (d && (d != u)) {
-        this._tryScroll(this._dragging, d, 'scrollTop', -amount);
+        this._tryScroll(anchor, d, 'scrollTop', -amount);
       }
 
       if (l && (l != r)) {
-        this._tryScroll(this._dragging, l, 'scrollLeft', amount);
+        this._tryScroll(anchor, l, 'scrollLeft', amount);
       }
 
       if (r && (r != l)) {
-        this._tryScroll(this._dragging, r, 'scrollLeft', -amount);
+        this._tryScroll(anchor, r, 'scrollLeft', -amount);
       }
     },
 
@@ -639,19 +661,34 @@ JX.install('DraggableList', {
 
       var container = from.parentNode;
       while (container) {
-        // Read the current scroll value.
-        value = container[property];
 
-        // Try to scroll.
-        container[property] -= amount;
-
-        // If we scrolled it, we're all done.
-        if (container[property] != value) {
-          break;
+        // In Safari, we'll eventually reach `window.document`, which is not
+        // sufficently node-like to support sigil tests.
+        var lock;
+        if (container === window.document) {
+          lock = false;
+        } else {
+          // Some elements may respond to, e.g., `scrollTop` adjustment, even
+          // though they are not scrollable. This sigil disables adjustment
+          // for them.
+          lock = JX.Stratcom.hasSigil(container, 'lock-scroll-while-dragging');
         }
 
-        if (container == to) {
-          break;
+        if (!lock) {
+          // Read the current scroll value.
+          value = container[property];
+
+          // Try to scroll.
+          container[property] -= amount;
+
+          // If we scrolled it, we're all done.
+          if (container[property] != value) {
+            break;
+          }
+
+          if (container == to) {
+            break;
+          }
         }
 
         container = container.parentNode;