Adds subtasking (#443) including:

* priority, start/due dates, progress, estimate, spent time roll-up to parent issues
* descendant issues tree displayed on the issue view with context menu support
* issue tree display on the gantt chart
* issue tree copy on project copy
* unlimited nesting

Defining subtasks requires the new permission 'Manage subtasks'.
Subtasks can not belong to a different project than the parent task.

Implementation is based on scoped nested sets for fast reads and updates.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@3573 e93f8b46-1217-0410-a6f0-8f06a7374b81

3 files changed, 32 insertions, 5 deletions

diff --git a/public/images/task_parent_end.png b/public/images/task_parent_end.png
new file mode 100644
index 000000000..fc9205643
--- /dev/null
+++ b/public/images/task_parent_end.png
diff --git a/public/javascripts/application.js b/public/javascripts/application.js
index 787b9904c..4cd34c2f2 100644
--- a/public/javascripts/application.js
+++ b/public/javascripts/application.js
@@ -194,6 +194,18 @@ function randomKey(size) {
 	return key;
 }
 
+function observeParentIssueField(url) {
+  new Ajax.Autocompleter('issue_parent_issue_id',
+                         'parent_issue_candidates',
+                         url,
+                         { minChars: 3,
+                           frequency: 0.5,
+                           paramName: 'q',
+                           updateElement: function(value) {
+                             document.getElementById('issue_parent_issue_id').value = value.id;
+                           }});
+}
+
 /* shows and hides ajax indicator */
 Ajax.Responders.register({
     onCreate: function(){
diff --git a/public/stylesheets/application.css b/public/stylesheets/application.css
index ec31c95c3..cd8e98699 100644
--- a/public/stylesheets/application.css
+++ b/public/stylesheets/application.css
@@ -237,6 +237,13 @@ p.breadcrumb { font-size: 0.9em; margin: 4px 0 4px 0;}
 p.subtitle { font-size: 0.9em; margin: -6px 0 12px 0; font-style: italic; } 
 p.footnote { font-size: 0.9em; margin-top: 0px; margin-bottom: 0px; }
 
+div.issue div.subject div div { padding-left: 16px; }
+div.issue div.subject p {margin: 0; margin-bottom: 0.1em; font-size: 90%; color: #999;}
+div.issue div.subject>div>p { margin-top: 0.5em; }
+div.issue div.subject h3 {margin: 0; margin-bottom: 0.1em;}
+
+#issue_tree table.issues { border: 0; }
+
 fieldset.collapsible { border-width: 1px 0 0 0; font-size: 0.9em; }
 fieldset.collapsible legend { padding-left: 16px; background: url(../images/arrow_expanded.png) no-repeat 0% 40%; cursor:pointer; }
 fieldset.collapsible.collapsed legend { background-image: url(../images/arrow_collapsed.png); }
@@ -588,8 +595,7 @@ button.tab-right {
 /***** Auto-complete *****/
 div.autocomplete {
   position:absolute;
-  width:250px;
-  background-color:white;
+  width:400px;
   margin:0;
   padding:0;
 }
@@ -598,23 +604,26 @@ div.autocomplete ul {
   margin:0;
   padding:0;
 }
-div.autocomplete ul li.selected { background-color: #ffb;}
 div.autocomplete ul li {
   list-style-type:none;
   display:block;
-  margin:0;
+  margin:-1px 0 0 0;
   padding:2px;
   cursor:pointer;
   font-size: 90%;
-  border-bottom: 1px solid #ccc;
+  border: 1px solid #ccc;
   border-left: 1px solid #ccc;
   border-right: 1px solid #ccc;
+  background-color:white;
 }
+div.autocomplete ul li.selected { background-color: #ffb;}
 div.autocomplete ul li span.informal {
   font-size: 80%;
   color: #aaa;
 }
 
+#parent_issue_candidates ul li {width: 500px;}
+
 /***** Diff *****/
 .diff_out { background: #fcc; }
 .diff_in { background: #cfc; }
@@ -741,6 +750,12 @@ background-image:url('../images/close_hl.png');
 .task_late { background:#f66 url(../images/task_late.png); border: 1px solid #f66; }
 .task_done { background:#66f url(../images/task_done.png); border: 1px solid #66f; }  
 .task_todo { background:#aaa url(../images/task_todo.png); border: 1px solid #aaa; }
+
+.task_todo.parent { background: #888; border: 1px solid #888; height: 6px;}
+.task_late.parent, .task_done.parent { height: 3px;}
+.task_todo.parent .left  { position: absolute; background: url(../images/task_parent_end.png) no-repeat 0 0; width: 8px; height: 16px; margin-left: -5px; left: 0px; top: -1px;}
+.task_todo.parent .right { position: absolute; background: url(../images/task_parent_end.png) no-repeat 0 0; width: 8px; height: 16px; margin-right: -5px; right: 0px; top: -1px;}
+
 .milestone { background-image:url(../images/milestone.png); background-repeat: no-repeat; border: 0; }
 
 /***** Icons *****/