From ed1d212ae2daea5e4bd043417610177093e99f19 Mon Sep 17 00:00:00 2001
From: Aleksander Machniak <alec@alec.pl>
Date: Sat, 16 Jan 2016 03:03:51 -0500
Subject: [PATCH] Improved SVG cleanup code

---
 program/js/treelist.js |  130 ++++++++++++++++++++++++++----------------
 1 files changed, 80 insertions(+), 50 deletions(-)

diff --git a/program/js/treelist.js b/program/js/treelist.js
index cc1880d..bcbfeeb 100644
--- a/program/js/treelist.js
+++ b/program/js/treelist.js
@@ -46,6 +46,8 @@
     scroll_speed: 20,
     save_state: false,
     keyboard: true,
+    tabexit: true,
+    parent_focus: false,
     check_droptarget: function(node) { return !node.virtual; }
   }, p || {});
 
@@ -108,37 +110,43 @@
   else
     update_data();
 
-  // register click handlers on list
-  container.on('click', 'div.treetoggle', function(e){
-    toggle(dom2id($(this).parent()));
-    e.stopPropagation();
-  });
-
-  container.on('click', 'li', function(e) {
-    // do not select record on checkbox/input click
-    if ($(e.target).is('input'))
-      return true;
-
-    var node = p.selectable ? indexbyid[dom2id($(this))] : null;
-    if (node && !node.virtual) {
-      select(node.id);
+  container.attr('role', 'tree')
+    .on('focusin', function(e) {
+      // TODO: only accept focus on virtual nodes from keyboard events
+      has_focus = true;
+    })
+    .on('focusout', function(e) {
+      has_focus = false;
+    })
+    // register click handlers on list
+    .on('click', 'div.treetoggle', function(e) {
+      toggle(dom2id($(this).parent()));
       e.stopPropagation();
-    }
-  });
+    })
+    .on('click', 'li', function(e) {
+      // do not select record on checkbox/input click
+      if ($(e.target).is('input'))
+        return true;
 
-  // mute clicks on virtual folder links (they need tabindex="0" in order to be selectable by keyboard)
-  container.on('mousedown', 'a', function(e) {
-    var link = $(e.target), node = indexbyid[dom2id(link.closest('li'))];
-    if (node && node.virtual && !link.attr('href')) {
-      e.preventDefault();
-      e.stopPropagation();
-      return false;
-    }
-  });
+      var node = p.selectable ? indexbyid[dom2id($(this))] : null;
+      if (node && !node.virtual) {
+        select(node.id);
+        e.stopPropagation();
+      }
+    })
+    // mute clicks on virtual folder links (they need tabindex="0" in order to be selectable by keyboard)
+    .on('mousedown', 'a', function(e) {
+      var link = $(e.target), node = indexbyid[dom2id(link.closest('li'))];
+      if (node && node.virtual && !link.attr('href')) {
+        e.preventDefault();
+        e.stopPropagation();
+        return false;
+      }
+    });
 
   // activate search function
   if (p.searchbox) {
-    searchfield = $(p.searchbox).on('keyup', function(e) {
+    searchfield = $(p.searchbox).off('keyup.treelist').on('keyup.treelist', function(e) {
       var key = rcube_event.get_keycode(e),
         mod = rcube_event.get_modifier(e);
 
@@ -167,25 +175,25 @@
     }).attr('autocomplete', 'off');
 
     // find the reset button for this search field
-    searchfield.parent().find('a.reset').click(function(e) {
+    searchfield.parent().find('a.reset').off('click.treelist').on('click.treelist', function(e) {
       reset_search();
       return false;
     })
   }
 
-  container.on('focusin', function(e){
-      // TODO: only accept focus on virtual nodes from keyboard events
-      has_focus = true;
-    })
-    .on('focusout', function(e){
-      has_focus = false;
+  $(document.body).on('keydown', keypress);
+
+  // catch focus when clicking the list container area
+  if (p.parent_focus) {
+    container.parent(':not(body)').click(function(e) {
+      if (!has_focus && selection) {
+        $(get_item(selection)).find(':focusable').first().focus();
+      }
+      else if (!has_focus) {
+        container.children('li:has(:focusable)').first().find(':focusable').first().focus();
+      }
     });
-
-  container.attr('role', 'tree');
-
-  $(document.body)
-    .bind('keydown', keypress);
-
+  }
 
   /////// private methods
 
@@ -235,6 +243,11 @@
    */
   function select(id)
   {
+    // allow subscribes to prevent selection change
+    if (me.triggerEvent('beforeselect', indexbyid[id]) === false) {
+      return;
+    }
+
     if (selection) {
       id2dom(selection, true).removeClass('selected').removeAttr('aria-selected');
       if (search_active)
@@ -316,7 +329,7 @@
 
       // re-render the entire subtree
       if (parent_node.children.length == 1) {
-        render_node(parent_node, parent_li.parent(), parent_li);
+        render_node(parent_node, null, parent_li);
         li = id2dom(node.id);
       }
       else {
@@ -347,6 +360,12 @@
     }
 
     indexbyid[node.id] = node;
+
+    // set new reference to node.html after insert
+    // will otherwise vanish in Firefox 3.6
+    if (typeof node.html == 'object') {
+        indexbyid[node.id].html = id2dom(node.id, true).children();
+    }
 
     if (sort) {
       resort_node(li, typeof sort == 'string' ? '[class~="' + sort + '"]' : '');
@@ -445,6 +464,10 @@
       node.deleted = true;
       delete indexbyid[id];
 
+      if (search_active) {
+        id2dom(id, false).remove();
+      }
+
       return true;
     }
 
@@ -464,7 +487,7 @@
    */
   function update_dom(node)
   {
-    var li = id2dom(node.id);
+    var li = id2dom(node.id, true);
     li.attr('aria-expanded', node.collapsed ? 'false' : 'true');
     li.children('ul').first()[(node.collapsed ? 'hide' : 'show')]();
     li.children('div.treetoggle').removeClass('collapsed expanded').addClass(node.collapsed ? 'collapsed' : 'expanded');
@@ -522,6 +545,11 @@
         var li, sli;
         if (!node.virtual && !node.deleted && String(node.text).toLowerCase().indexOf(q) >= 0 && hits.indexOf(node.id) < 0) {
           li = id2dom(node.id);
+
+          // skip already filtered nodes
+          if (li.data('filtered'))
+            return;
+
           sli = $('<li>')
             .attr('id', li.attr('id') + '--xsR')
             .attr('class', li.attr('class'))
@@ -550,9 +578,10 @@
     // search recursively in tree (to keep sorting order)
     search_tree(data);
     search_active = true;
-    last_search = q;
 
     me.triggerEvent('search', { query: q, last: last_search, count: hits.length, ids: hits, execute: enter||false });
+
+    last_search = q;
 
     return hits.count;
   }
@@ -566,7 +595,7 @@
       searchfield.val('');
 
     $(container).children('li.searchresult__').remove();
-    $(container).children('li').show();
+    $(container).children('li').filter(function() { return !$(this).data('filtered'); }).show();
 
     search_active = false;
 
@@ -680,7 +709,8 @@
         node.childlistclass = sublist.attr('class');
       }
       if (node.children.length) {
-        node.collapsed = sublist.css('display') == 'none';
+        if (node.collapsed === undefined)
+          node.collapsed = sublist.css('display') == 'none';
 
         // apply saved state
         state = get_state(node.id, node.collapsed);
@@ -805,7 +835,7 @@
     var target = e.target || {},
       keyCode = rcube_event.get_keycode(e);
 
-    if (!has_focus || target.nodeName == 'INPUT' || target.nodeName == 'TEXTAREA' || target.nodeName == 'SELECT')
+    if (!has_focus || target.nodeName == 'INPUT' && keyCode != 38 && keyCode != 40 || target.nodeName == 'TEXTAREA' || target.nodeName == 'SELECT')
       return true;
 
     switch (keyCode) {
@@ -831,7 +861,7 @@
         return false;
 
       case 9:  // Tab
-        if (p.keyboard) {
+        if (p.keyboard && p.tabexit) {
           // jump to last/first item to move focus away from the treelist widget by tab
           var limit = rcube_event.get_modifier(e) == SHIFT_KEY ? 'first' : 'last';
           focus_noscroll(container.find('li[role=treeitem]:has(a)')[limit]().find('a:'+limit));
@@ -888,9 +918,9 @@
    * When dragging starts, compute absolute bounding boxes of the list and it's items
    * for faster comparisons while mouse is moving
    */
-  function drag_start()
+  function drag_start(force)
   {
-    if (drag_active)
+    if (!force && drag_active)
       return;
 
     drag_active = true;
@@ -913,7 +943,7 @@
     for (var id in indexbyid) {
       li = id2dom(id);
       item = li.children().first().get(0);
-      if (height = item.offsetHeight) {
+      if (item && (height = item.offsetHeight)) {
         pos = $(item).offset();
         pos.top += list_scroll_top;
         item_coords[id] = {
@@ -1031,7 +1061,7 @@
           autoexpand_item = id;
           autoexpand_timer = setTimeout(function() {
             expand(autoexpand_item);
-            drag_start();  // re-calculate item coords
+            drag_start(true);  // re-calculate item coords
             autoexpand_item = null;
             if (ui_droppable)
               $.ui.ddmanager.prepareOffsets($.ui.ddmanager.current, null);

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