Removing unimportant parts of the page as a prevention against #65

There is now complete analysis of the issue, but I don’t know how to fix
it, because we just write into various input boxes and they got focus (and
subsequently Firefox makes them visible).

2 files changed, 55 insertions, 33 deletions

diff --git a/data/lib/bugzillaDOMFunctions.js b/data/lib/bugzillaDOMFunctions.js
index f58f0d9..4437e7c 100644
--- a/data/lib/bugzillaDOMFunctions.js
+++ b/data/lib/bugzillaDOMFunctions.js
@@ -4,13 +4,13 @@
 
 /**
  * Select option with given value on the <SELECT> element with given id.
- * 
+ *
  * Also execute change HTMLEvent, so that the form behaves accordingly.
- * 
+ *
  * @param id
  * @param label
  * @return none
- * 
+ *
  */
 function selectOption (id, label, fireEvent) {
   if (!fireEvent) {
@@ -48,15 +48,16 @@ function selectOptionByLabel(id, label, fireEvent) {
 
 /**
  * Add object to the text box (comment box or status whiteboard)
- * 
+ *
  * @param id
  *          String with the id of the element
  * @param stuff
  *          String/Array to be added to the comment box
- * 
+ *
  * @return none
  */
 function addStuffToTextBox (id, stuff) {
+  var saveFocus = document.activeElement;
   var textBox = document.getElementById(id);
   if (textBox.tagName.toLowerCase() === "textarea") {
     stuff = textBox.value ? "\n\n" + stuff : stuff;
@@ -65,11 +66,12 @@ function addStuffToTextBox (id, stuff) {
   else {
     textBox.value = addCSVValue(textBox.value,stuff);
   }
+  saveFocus.focus();
 }
 
 /**
  * Remove a keyword from the element if it is there
- * 
+ *
  * @param id
  *          String with the id of the element
  * @param stuff
@@ -82,7 +84,7 @@ function removeStuffFromTextBox (id, stuff) {
 
 /**
  * generalized hasKeyword ... search in the value of the box with given id
- * 
+ *
  * @param id
  *          String with ID of the element we want to check
  * @param str
@@ -102,7 +104,7 @@ function idContainsWord (id, str) {
 
 /**
  * Check for the presence of a keyword
- * 
+ *
  * @param str
  *          String with the keyword
  * @return Boolean
@@ -113,9 +115,9 @@ function hasKeyword (str) {
 
 /**
  * Set the bug to NEEDINFO state
- * 
+ *
  * Working function.
- * 
+ *
  * @return none
  * @todo TODO we may extend this to general setNeedinfo function with parameter
  *       [reporter|assignee|general-email-address]
@@ -126,7 +128,7 @@ function setNeedinfoReporter () {
 }
 
 /**
- * 
+ *
  */
 function getOwner () {
   // TODO(maemo) doesn't work on maemo
@@ -137,7 +139,7 @@ function getOwner () {
 /**
  * Return maintainer which is per default by bugzilla (which is not necessarily
  * the one who is default maintainer per component)
- * 
+ *
  * @return String with the maintainer's email address
  */
 function getDefaultBugzillaMaintainer (component) {
@@ -147,7 +149,7 @@ function getDefaultBugzillaMaintainer (component) {
 /**
  * Generic function to add new button to the page. Actually copies new button
  * from the old one (in order to have the same look-and-feel, etc.
- * 
+ *
  * @param location
  *          Object around which the new button will be added
  * @param after
@@ -207,7 +209,7 @@ function createNewButton (location, after, cmdObj) {
 
 /**
  * Get the current title of the bug
- * 
+ *
  * @return string
  */
 function getSummary() {
@@ -216,7 +218,7 @@ function getSummary() {
 
 /**
  * Get the current title of the bug
- * 
+ *
  * @return string
  */
 function getSeverity() {
@@ -225,7 +227,7 @@ function getSeverity() {
 
 /**
  * Get the current email of the reporter of the bug.
- * 
+ *
  * @return string
  */
 function getReporter () {
@@ -265,7 +267,7 @@ function commentsWalker (fce) {
 
 /**
  * collect the list of attachments in a structured format
- * 
+ *
  * @return Array of arrays, one for each attachments; each record has string
  *         name of the attachment, integer its id number, string of MIME type,
  *         integer of size in kilobytes, and the whole element itself
@@ -282,7 +284,7 @@ function getAttachments () {
 
 /**
  * Get login of the currently logged-in user.
- * 
+ *
  * @return String with the login name of the currently logged-in user
  */
 function getLogin () {
@@ -294,7 +296,7 @@ function getLogin () {
 
 /**
  * adds a person to the CC list, if it isn't already there
- * 
+ *
  * @param who
  *          String with email address or "self" if the current user of the
  *          bugzilla should be added
@@ -316,7 +318,7 @@ function addToCCList (who) {
 
 /**
  * a collect a list of emails on CC list
- * 
+ *
  * @return Array with email addresses as Strings.
  */
 function getCCList () {
@@ -332,11 +334,11 @@ function getCCList () {
 
 /**
  * remove elements from the page based on their IDs
- * 
+ *
  * @param doc
  *          Document object
  * @param target
- *          String/Array with ID(s)
+ *          Array with querySelector parameters
  * @param remove
  *          Boolean indicating whether the node should be actually removed or
  *          just hidden.
@@ -344,21 +346,39 @@ function getCCList () {
  *         do actual activity.
  */
 function killNodes(doc, target, remove) {
-  var targetArr = target instanceof Array ? target : target.trim().split(/[,\s]+/);
-  targetArr.forEach(function(x) {
-    if (remove) {
-      var targetNode = doc.getElementById(x);
-      targetNode.parentNode.removeChild(targetNode);
-    }
-    else {
-      x.style.display = "none";
+  var victimElements = [];
+
+  target.forEach(function(x) {
+    var targetNode = doc.querySelector(x);
+    if (targetNode) {
+      if (remove) {
+        console.log("killing element " + targetNode);
+        victimElements.push([x,targetNode]);
+      }
+      else {
+        targetNode.style.display = "none";
+      }
     }
   });
+
+  var elem = {};
+  // Don't run victimElements.forEach here as we are effectively
+  // removing its members.
+  for(var i = 0, ii = victimElements.length; i < ii; i++) {
+    elem = victimElements[i];
+    try {
+      elem[1].parentNode.removeChild(elem[1]);
+//      elem[1].style.backgroundColor = "red";
+    }
+    catch (e if e instanceof TypeError) {
+      console.error("Cannot remove: " + elem[0]);
+    }
+  }
 }
 
 /**
  * Is this bug a RHEL bug?
- * 
+ *
  * @return Boolean true if it is a RHEL bug
  */
 function isEnterprise() {
@@ -370,7 +390,7 @@ function isEnterprise() {
 
 /**
  * Find out whether the bug is needed an attention of bugZappers
- * 
+ *
  * @return Boolean whether the bug has been triaged or not
  */
 function isTriaged() {
@@ -379,7 +399,7 @@ function isTriaged() {
 
 /**
  * Return string with the ID for the external_id SELECT for external bugzilla
- * 
+ *
  * @param URLhostname
  *          String hostname of the external bugzilla
  * @return String with the string for the external_id SELECT
diff --git a/data/lib/bzpage.js b/data/lib/bzpage.js
index 296fe29..7b8a764 100644
--- a/data/lib/bzpage.js
+++ b/data/lib/bzpage.js
@@ -215,6 +215,7 @@ function changeAssignee (newAssignee) {
     }
   }
 
+  var saveFocus = document.activeElement;
   if (newAssignee) {
     clickMouse("bz_assignee_edit_action");
     document.getElementById("assigned_to").value = newAssignee;
@@ -224,6 +225,7 @@ function changeAssignee (newAssignee) {
       defAssigneeButton.style.display = "none";
     }
   }
+  saveFocus.focus();
 }
 
 /**