From b1710c8f53ed757f1c06e84e4c2790832232c58f Mon Sep 17 00:00:00 2001
From: "lpsolit%gmail.com" <>
Date: Sat, 7 Apr 2007 07:34:21 +0000
Subject: Bug 262275: Allow to expand/collapse comments when viewing bugs -
 Patch by Frédéric Buclin <LpSolit@gmail.com> r=myk a=LpSolit
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 skins/standard/global.css                  |  4 ++
 template/en/default/bug/comments.html.tmpl | 61 +++++++++++++++++++++++++++++-
 2 files changed, 64 insertions(+), 1 deletion(-)

diff --git a/skins/standard/global.css b/skins/standard/global.css
index 1687a4aa0..244958749 100644
--- a/skins/standard/global.css
+++ b/skins/standard/global.css
@@ -322,6 +322,10 @@ div.user_match {
     padding: 0.5em 1em;
 }
 
+.collapsed {
+    display: none;
+}
+
 /* Rules specific for printing */
 @media print {
     #header, #footer {
diff --git a/template/en/default/bug/comments.html.tmpl b/template/en/default/bug/comments.html.tmpl
index 9d05ba4ac..428b8771c 100644
--- a/template/en/default/bug/comments.html.tmpl
+++ b/template/en/default/bug/comments.html.tmpl
@@ -37,6 +37,58 @@
         comment_elem.className.replace(/(\s*|^)bz_private(\s*|$)/, '$2');
     }
   }
+
+  /* The functions below expand and collapse comments  */
+
+  function toggle_comment_display(link, comment_id) {
+    var comment = document.getElementById('comment_text_' + comment_id);
+    var re = new RegExp(/\bcollapsed\b/);
+    if (comment.className.match(re))
+        expand_comment(link, comment);
+    else
+        collapse_comment(link, comment);
+  }
+
+  function toggle_all_comments(action) {
+    var num_comments = [% comments.size FILTER html %];
+
+    // If for some given ID the comment doesn't exist, this doesn't mean
+    // there are no more comments, but that the comment is private and
+    // the user is not allowed to view it.
+
+    for (var id = 0; id < num_comments; id++) {
+        var comment = document.getElementById('comment_text_' + id);
+        if (!comment)
+            continue;
+
+        var link = document.getElementById('comment_link_' + id);
+        if (action == 'collapse')
+            collapse_comment(link, comment);
+        else
+            expand_comment(link, comment);
+    }
+  }
+
+  function collapse_comment(link, comment) {
+    link.innerHTML = "(+)";
+    link.title = "Expand the comment.";
+    comment.className = "collapsed";
+  }
+
+  function expand_comment(link, comment) {
+    link.innerHTML = "(-)";
+    link.title = "Collapse the comment";
+    comment.className = "";
+  }
+
+  /* This way, we are sure that browsers which do not support JS
+   * won't display this link  */
+
+  function addCollapseLink(count) {
+    document.write(' <a href="#" id="comment_link_' + count +
+                   '" onclick="toggle_comment_display(this, ' +  count +
+                   '); return false;" title="Collapse the comment.">(-)</a> ');
+  }
   //-->
   </script>
 
@@ -69,6 +121,11 @@
     [% END %]
 [% END %]
 
+[% IF mode == "edit" %]
+  <a href="#" onclick="toggle_all_comments('collapse'); return false;">Collapse All Comments</a> -
+  <a href="#" onclick="toggle_all_comments('expand'); return false;">Expand All Comments</a>
+  <hr>
+[% END %]
 
 [% FOREACH comment = comments %]
   [% IF count >= start_at %]
@@ -96,9 +153,10 @@
           <tr>
             <th align="left">
               <b><a name="c0" href="show_bug.cgi?id=[% bug.bug_id %]#c0">
-                Description</a>:</b>&nbsp;&nbsp;
+                Description</a>:</b>
                 [% IF mode == "edit" %]
                   [%%]<script type="text/javascript"><!-- 
+                    addCollapseLink(0);
                     addReplyLink(0);
                   //--></script>
                 [% END %]
@@ -122,6 +180,7 @@
           </i>
           [% IF mode == "edit" %]
           <script type="text/javascript"><!-- 
+            addCollapseLink([% count %]);
             addReplyLink([% count %]); //--></script>
           [% END %]
           <span class="comment_rule">-------</span>
-- 
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