Open Source Monorail

appengine/monorail/static/js/tracker/tracker-editing.js

+/* Copyright 2016 The Chromium Authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style
+ * license that can be found in the LICENSE file or at
+ * https://developers.google.com/open-source/licenses/bsd
+ */
+
+/**
+ * This file contains JS functions that support various issue editing
+ * features of Monorail.  These editing features include: selecting
+ * issues on the issue list page, adding attachments, expanding and
+ * collapsing the issue editing form, and starring issues.
+ *
+ * Browser compatability: IE6, IE7, FF1.0+, Safari.
+ */
+
+
+/**
+ * Here are some string constants that are used repeatedly in the code.
+ */
+var TKR_SELECTED_CLASS = 'selected';
+var TKR_UNDEF_CLASS = 'undef';
+var TKR_NOVEL_CLASS = 'novel';
+var TKR_EXCL_CONFICT_CLASS = 'exclconflict';
+var TKR_QUESTION_MARK_CLASS = 'questionmark';
+var TKR_ATTACHPROMPT_ID = 'attachprompt';
+var TKR_ATTACHAFILE_ID = 'attachafile';
+var TKR_ATTACHMAXSIZE_ID = 'attachmaxsize';
+var TKR_CURRENT_TEMPLATE_INDEX_ID = 'current_template_index';
+var TKR_PROMPT_MEMBERS_ONLY_CHECKBOX_ID = 'members_only_checkbox';
+var TKR_PROMPT_SUMMARY_EDITOR_ID = 'summary_editor';
+var TKR_PROMPT_SUMMARY_MUST_BE_EDITED_CHECKBOX_ID =
+    'summary_must_be_edited_checkbox';
+var TKR_PROMPT_CONTENT_EDITOR_ID = 'content_editor';
+var TKR_PROMPT_STATUS_EDITOR_ID = 'status_editor';
+var TKR_PROMPT_OWNER_EDITOR_ID = 'owner_editor';
+var TKR_PROMPT_ADMIN_NAMES_EDITOR_ID = 'admin_names_editor';
+var TKR_OWNER_DEFAULTS_TO_MEMBER_CHECKBOX_ID =
+    'owner_defaults_to_member_checkbox';
+var TKR_OWNER_DEFAULTS_TO_MEMBER_AREA_ID =
+    'owner_defaults_to_member_area';
+var TKR_COMPONENT_REQUIRED_CHECKBOX_ID =
+    'component_required_checkbox';
+var TKR_PROMPT_COMPONENTS_EDITOR_ID = 'components_editor';
+var TKR_FIELD_EDITOR_ID_PREFIX = 'custom_';
+var TKR_PROMPT_LABELS_EDITOR_ID_PREFIX = 'label';
+var TKR_CONFIRMAREA_ID = 'confirmarea';
+var TKR_DISCARD_YOUR_CHANGES = 'Discard your changes?';
+// Note, users cannot enter '<'.
+var TKR_DELETED_PROMPT_NAME = '<DELETED>';
+// Display warning if labels contain the following prefixes.
+// The following list is the same as tracker_constants.RESERVED_PREFIXES except
+// for the 'hotlist' prefix. 'hostlist' will be added when it comes a full
+// feature and when projects that use 'Hostlist-*' labels are transitioned off.
+var TKR_LABEL_RESERVED_PREFIXES = [
+    'id', 'project', 'reporter', 'summary', 'status', 'owner', 'cc',
+    'attachments', 'attachment', 'component', 'opened', 'closed',
+    'modified', 'is', 'has', 'blockedon', 'blocking', 'blocked', 'mergedinto',
+    'stars', 'starredby', 'description', 'comment', 'commentby', 'label',
+    'rank', 'explicit_status', 'derived_status', 'explicit_owner',
+    'derived_owner', 'explicit_cc', 'derived_cc', 'explicit_label',
+    'derived_label', 'last_comment_by', 'exact_component',
+    'explicit_component', 'derived_component']
+
+/**
+ * Select all the issues on the issue list page.
+ */
+function TKR_selectAllIssues() {
+  TKR_selectIssues(true);
+}
+
+
+/**
+ * Function to deselect all the issues on the issue list page.
+ */
+function TKR_selectNoneIssues() {
+  TKR_selectIssues(false);
+}
+
+
+/**
+ * Function to select or deselect all the issues on the issue list page.
+ * @param {boolean} checked True means select issues, False means deselect.
+ */
+function TKR_selectIssues(checked) {
+  var table = $('resultstable');
+  for (var r = 0; r < table.rows.length; ++r) {
+    var row = table.rows[r];
+    var firstCell = row.cells[0];
+    if (firstCell.tagName == 'TD') {
+      for (var e = 0; e < firstCell.childNodes.length; ++e) {
+        var element = firstCell.childNodes[e];
+        if (element.tagName == 'INPUT' && element.type == 'checkbox') {
+          element.checked = checked ? 'checked' : '';
+          if (checked) {
+            row.classList.add(TKR_SELECTED_CLASS);
+          } else {
+            row.classList.remove(TKR_SELECTED_CLASS);
+          }
+        }
+      }
+    }
+  }
+}
+
+
+/**
+ * The ID number to append to the next dynamically created file upload field.
+ */
+var TKR_nextFileID = 1;
+
+
+/**
+ * Function to dynamically create a new attachment upload field add
+ * insert it into the page DOM.
+ * @param {string} id The id of the parent HTML element.
+ */
+function TKR_addAttachmentFields(id) {
+  if (TKR_nextFileID >= 16) {
+    return;
+  }
+  var el = $(id);
+  el.style.marginTop = '4px';
+  var div = document.createElement('div');
+  var id = 'file' + TKR_nextFileID;
+  var label = TKR_createChild(div, 'label', null, null, 'Attach file:');
+  label.setAttribute('for', id);
+  var input = TKR_createChild(
+      div, 'input', null, id, null, "width:auto;margin-left:17px");
+  input.setAttribute('type', 'file');
+  input.name = id;
+  var removeLink = TKR_createChild(
+      div, 'a', null, null, 'Remove', "font-size:x-small");
+  removeLink.href = '#';
+  removeLink.addEventListener('click', function(event) {
+          console.log(arguments);
+          var target = event.target;
+          $('attachafile').focus();
+          target.parentNode.parentNode.removeChild(target.parentNode);
+          event.preventDefault();
+      });
+  el.appendChild(div);
+  el.querySelector('input').focus();
+  ++TKR_nextFileID;
+  if (TKR_nextFileID < 16) {
+    $(TKR_ATTACHAFILE_ID).innerText = 'Attach another file';
+  } else {
+    $(TKR_ATTACHPROMPT_ID).style.display = 'none';
+  }
+  $(TKR_ATTACHMAXSIZE_ID).style.display = '';
+}
+
+
+/**
+ * Function to display the form so that the user can update an issue.
+ */
+function TKR_openIssueUpdateForm() {
+  TKR_showHidden($('makechangesarea'));
+  TKR_goToAnchor('makechanges');
+  TKR_forceProperTableWidth();
+  window.setTimeout(
+      function () { document.getElementById('addCommentTextArea').focus(); },
+      100);
+}
+
+
+/**
+ * The index of the template that is currently selected for editing
+ * on the administration page for issues.
+ */
+var TKR_currentTemplateIndex = 0;
+
+
+/**
+ * Array of field IDs that are defined in the current project, set by call to setFieldIDs().
+ */
+var TKR_fieldIDs = [];
+
+
+function TKR_setFieldIDs(fieldIDs) {
+  TKR_fieldIDs = fieldIDs;
+}
+
+
+/**
+ * This function displays the appropriate template text in a text field.
+ * It is called after the user has selected one template to view/edit.
+ * @param {Element} widget The list widget containing the list of templates.
+ */
+function TKR_selectTemplate(widget) {
+  TKR_showHidden($('edit_panel'));
+  TKR_currentTemplateIndex = widget.value;
+  $(TKR_CURRENT_TEMPLATE_INDEX_ID).value = TKR_currentTemplateIndex;
+
+  var content_editor = $(TKR_PROMPT_CONTENT_EDITOR_ID);
+  TKR_makeDefined(content_editor);
+
+  var can_edit = $('can_edit_' + TKR_currentTemplateIndex).value == 'yes';
+  var disabled = can_edit ? '' : 'disabled';
+
+  $(TKR_PROMPT_MEMBERS_ONLY_CHECKBOX_ID).disabled = disabled;
+  $(TKR_PROMPT_MEMBERS_ONLY_CHECKBOX_ID).checked = $(
+      'members_only_' + TKR_currentTemplateIndex).value == 'yes';
+  $(TKR_PROMPT_SUMMARY_EDITOR_ID).disabled = disabled;
+  $(TKR_PROMPT_SUMMARY_EDITOR_ID).value = $(
+      'summary_' + TKR_currentTemplateIndex).value;
+  $(TKR_PROMPT_SUMMARY_MUST_BE_EDITED_CHECKBOX_ID).disabled = disabled;
+  $(TKR_PROMPT_SUMMARY_MUST_BE_EDITED_CHECKBOX_ID).checked = $(
+      'summary_must_be_edited_' + TKR_currentTemplateIndex).value == 'yes';
+  content_editor.disabled = disabled;
+  content_editor.value = $('content_' + TKR_currentTemplateIndex).value;
+  $(TKR_PROMPT_STATUS_EDITOR_ID).disabled = disabled;
+  $(TKR_PROMPT_STATUS_EDITOR_ID).value = $(
+      'status_' + TKR_currentTemplateIndex).value;
+  $(TKR_PROMPT_OWNER_EDITOR_ID).disabled = disabled;
+  $(TKR_PROMPT_OWNER_EDITOR_ID).value = $(
+      'owner_' + TKR_currentTemplateIndex).value;
+  $(TKR_OWNER_DEFAULTS_TO_MEMBER_CHECKBOX_ID).disabled = disabled;
+  $(TKR_OWNER_DEFAULTS_TO_MEMBER_CHECKBOX_ID).checked = $(
+      'owner_defaults_to_member_' + TKR_currentTemplateIndex).value == 'yes';
+  $(TKR_COMPONENT_REQUIRED_CHECKBOX_ID).disabled = disabled;
+  $(TKR_COMPONENT_REQUIRED_CHECKBOX_ID).checked = $(
+      'component_required_' + TKR_currentTemplateIndex).value == 'yes';
+  $(TKR_OWNER_DEFAULTS_TO_MEMBER_AREA_ID).disabled = disabled;
+  $(TKR_OWNER_DEFAULTS_TO_MEMBER_AREA_ID).style.display =
+      $(TKR_PROMPT_OWNER_EDITOR_ID).value ? 'none' : '';
+  $(TKR_PROMPT_COMPONENTS_EDITOR_ID).disabled = disabled;
+  $(TKR_PROMPT_COMPONENTS_EDITOR_ID).value = $(
+      'components_' + TKR_currentTemplateIndex).value;
+
+  // Blank out all custom field editors first, then fill them in during the next loop.
+  for (var i = 0; i < TKR_fieldIDs.length; i++) {
+    var fieldEditor = $(TKR_FIELD_EDITOR_ID_PREFIX + TKR_fieldIDs[i]);
+    var holder = $('field_value_' + TKR_currentTemplateIndex + '_' + TKR_fieldIDs[i]);
+    if (fieldEditor) {
+      fieldEditor.disabled = disabled;
+      fieldEditor.value = holder ? holder.value : '';
+    }
+  }
+
+  var i = 0;
+  while ($(TKR_PROMPT_LABELS_EDITOR_ID_PREFIX + i)) {
+    $(TKR_PROMPT_LABELS_EDITOR_ID_PREFIX + i).disabled = disabled;
+    $(TKR_PROMPT_LABELS_EDITOR_ID_PREFIX + i).value =
+        $('label_' + TKR_currentTemplateIndex + '_' + i).value;
+    i++;
+  }
+
+  $(TKR_PROMPT_ADMIN_NAMES_EDITOR_ID).disabled = disabled;
+  $(TKR_PROMPT_ADMIN_NAMES_EDITOR_ID).value = $(
+      'admin_names_' + TKR_currentTemplateIndex).value;
+
+  var numNonDeletedTemplates = 0;
+  for (var i = 0; i < TKR_templateNames.length; i++) {
+    if (TKR_templateNames[i] != TKR_DELETED_PROMPT_NAME) {
+      numNonDeletedTemplates++;
+    }
+  }
+  if ($('delbtn')) {
+    if (numNonDeletedTemplates > 1) {
+      $('delbtn').disabled='';
+    }
+    else { // Don't allow the last template to be deleted.
+      $('delbtn').disabled='disabled';
+    }
+  }
+}
+
+
+var TKR_templateNames = [];  // Exported in tracker-onload.js
+
+
+/**
+ * Create a new issue template and add the needed form fields to the DOM.
+ */
+function TKR_newTemplate() {
+  var newIndex = TKR_templateNames.length;
+  var templateName = prompt('Name of new template?', '');
+  templateName = templateName.replace(
+      /[&<>"]/g, ''  // " help emacs highlighing
+  );
+  if (!templateName) return;
+
+  for (var i = 0; i < TKR_templateNames.length; i++) {
+    if (templateName == TKR_templateNames[i]) {
+      alert('Please choose a unique name.')
+      return;
+    }
+  }
+
+  TKR_addTemplateHiddenFields(newIndex, templateName);
+  TKR_templateNames.push(templateName);
+
+  var templateOption = TKR_createChild(
+      $('template_menu'), 'option', null, null, templateName);
+  templateOption.value = newIndex;
+  templateOption.selected = 'selected';
+
+  var developerOption = TKR_createChild(
+      $('default_template_for_developers'), 'option', null, null, templateName);
+  developerOption.value = templateName;
+
+  var userOption = TKR_createChild(
+      $('default_template_for_users'), 'option', null, null, templateName);
+  userOption.value = templateName;
+
+  TKR_selectTemplate($('template_menu'));
+}
+
+
+/**
+ * Private function to append HTML for new hidden form fields
+ * for a new issue template to the issue admin form.
+ */
+function TKR_addTemplateHiddenFields(templateIndex, templateName) {
+  var parentEl = $('adminTemplates');
+  TKR_appendHiddenField(
+      parentEl, 'template_id_' + templateIndex, 'template_id_' + templateIndex, '0');
+  TKR_appendHiddenField(parentEl, 'name_' + templateIndex,
+      'name_' + templateIndex, templateName);
+  TKR_appendHiddenField(parentEl, 'members_only_' + templateIndex);
+  TKR_appendHiddenField(parentEl, 'summary_' + templateIndex);
+  TKR_appendHiddenField(parentEl, 'summary_must_be_edited_' + templateIndex);
+  TKR_appendHiddenField(parentEl, 'content_' + templateIndex);
+  TKR_appendHiddenField(parentEl, 'status_' + templateIndex);
+  TKR_appendHiddenField(parentEl, 'owner_' + templateIndex);
+  TKR_appendHiddenField(
+    parentEl, 'owner_defaults_to_member_' + templateIndex,
+    'owner_defaults_to_member_' + templateIndex, 'yes');
+  TKR_appendHiddenField(parentEl, 'component_required_' + templateIndex);
+  TKR_appendHiddenField(parentEl, 'components_' + templateIndex);
+  TKR_appendHiddenField(parentEl, 'members_only_' + templateIndex);
+
+  var i = 0;
+  while ($('label_0_' + i)) {
+    TKR_appendHiddenField(parentEl, 'label_' + templateIndex,
+       'label_' + templateIndex + '_' + i);
+    i++;
+  }
+
+  for (var i = 0; i < TKR_fieldIDs.length; i++) {
+    var fieldId = 'field_value_' + templateIndex + '_' + TKR_fieldIDs[i];
+    TKR_appendHiddenField(parentEl, fieldId, fieldId);
+  }
+
+  TKR_appendHiddenField(parentEl, 'admin_names_' + templateIndex);
+  TKR_appendHiddenField(
+      parentEl, 'can_edit_' + templateIndex, 'can_edit_' + templateIndex,
+      'yes');
+}
+
+
+/**
+ * Utility function to append string parts for one hidden field
+ * to the given array.
+ */
+function TKR_appendHiddenField(parentEl, name, opt_id, opt_value) {
+    var input = TKR_createChild(parentEl, 'input', null, opt_id || name);
+    input.setAttribute('type', 'hidden');
+    input.name = name;
+    input.value = opt_value || '';
+}
+
+
+/**
+ * Delete the currently selected issue template, and mark its hidden
+ * form field as deleted so that they will be ignored when submitted.
+ */
+function TKR_deleteTemplate() {
+  // Mark the current template name as deleted.
+  TKR_templateNames.splice(
+    TKR_currentTemplateIndex, 1, TKR_DELETED_PROMPT_NAME);
+  $('name_' + TKR_currentTemplateIndex).value = TKR_DELETED_PROMPT_NAME;
+  _toggleHidden($('edit_panel'));
+  $('delbtn').disabled = 'disabled';
+  TKR_rebuildTemplateMenu();
+  TKR_rebuildDefaultTemplateMenu('default_template_for_developers');
+  TKR_rebuildDefaultTemplateMenu('default_template_for_users');
+}
+
+/**
+ * Utility function to rebuild the template menu on the issue admin page.
+ */
+function TKR_rebuildTemplateMenu() {
+  var parentEl = $('template_menu');
+  while (parentEl.childNodes.length)
+      parentEl.removeChild(parentEl.childNodes[0]);
+  for (var i = 0; i < TKR_templateNames.length; i++) {
+    if (TKR_templateNames[i] != TKR_DELETED_PROMPT_NAME) {
+        var option = TKR_createChild(
+            parentEl, 'option', null, null, TKR_templateNames[i]);
+        option.value = i;
+    }
+  }
+}
+
+
+/**
+ * Utility function to rebuild a default template drop-down.
+ */
+function TKR_rebuildDefaultTemplateMenu(menuID) {
+  var defaultTemplateName = $(menuID).value;
+  var parentEl = $(menuID);
+  while (parentEl.childNodes.length)
+      parentEl.removeChild(parentEl.childNodes[0]);
+  for (var i = 0; i < TKR_templateNames.length; i++) {
+    if (TKR_templateNames[i] != TKR_DELETED_PROMPT_NAME) {
+        var option = TKR_createChild(
+            parentEl, 'option', null, null, TKR_templateNames[i]);
+        option.values = TKR_templateNames[i];
+        if (defaultTemplateName == TKR_templateNames[i]) {
+            option.setAttribute('selected', 'selected');
+        }
+    }
+  }
+}
+
+
+/**
+ * Change the issue template to the specified one.
+ * TODO(jrobbins): move to an AJAX implementation that would not reload page.
+ *
+ * @param {string} projectName The name of the current project.
+ * @param {string} templateName The name of the template to switch to.
+ */
+function TKR_switchTemplate(projectName, templateName) {
+  var ok = true;
+  if (TKR_isDirty) {
+    ok = confirm('Switching to a different template will lose the text you entered.');
+  }
+  if (ok) {
+    window.location = '/p/' + projectName +
+      '/issues/entry?template=' + templateName;
+  }
+}
+
+/**
+ * Function to remove a CSS class and initial tip from a text widget.
+ * Some text fields or text areas display gray textual tips to help the user
+ * make use of those widgets.  When the user focuses on the field, the tip
+ * disappears and is made ready for user input (in the normal text color).
+ * @param {Element} el The form field that had the gray text tip.
+ */
+function TKR_makeDefined(el) {
+  if (el.classList.contains(TKR_UNDEF_CLASS)) {
+    el.classList.remove(TKR_UNDEF_CLASS);
+    el.value = '';
+  }
+}
+
+
+/**
+ * Save the contents of the visible issue template text area into a hidden
+ * text field for later submission.
+ * Called when the user has edited the text of a issue template.
+ */
+function TKR_saveTemplate() {
+  if (TKR_currentTemplateIndex) {
+    $('members_only_' + TKR_currentTemplateIndex).value =
+        $(TKR_PROMPT_MEMBERS_ONLY_CHECKBOX_ID).checked ? 'yes' : '';
+    $('summary_' + TKR_currentTemplateIndex).value =
+        $(TKR_PROMPT_SUMMARY_EDITOR_ID).value;
+    $('summary_must_be_edited_' + TKR_currentTemplateIndex).value =
+        $(TKR_PROMPT_SUMMARY_MUST_BE_EDITED_CHECKBOX_ID).checked ? 'yes' : '';
+    $('content_' + TKR_currentTemplateIndex).value =
+        $(TKR_PROMPT_CONTENT_EDITOR_ID).value;
+    $('status_' + TKR_currentTemplateIndex).value =
+        $(TKR_PROMPT_STATUS_EDITOR_ID).value;
+    $('owner_' + TKR_currentTemplateIndex).value =
+        $(TKR_PROMPT_OWNER_EDITOR_ID).value;
+    $('owner_defaults_to_member_' + TKR_currentTemplateIndex).value =
+        $(TKR_OWNER_DEFAULTS_TO_MEMBER_CHECKBOX_ID).checked ? 'yes' : '';
+    $('component_required_' + TKR_currentTemplateIndex).value =
+        $(TKR_COMPONENT_REQUIRED_CHECKBOX_ID).checked ? 'yes' : '';
+    $('components_' + TKR_currentTemplateIndex).value =
+        $(TKR_PROMPT_COMPONENTS_EDITOR_ID).value;
+    $(TKR_OWNER_DEFAULTS_TO_MEMBER_AREA_ID).style.display =
+        $(TKR_PROMPT_OWNER_EDITOR_ID).value ? 'none' : '';
+
+    for (var i = 0; i < TKR_fieldIDs.length; i++) {
+      var fieldID = TKR_fieldIDs[i];
+      var fieldEditor = $(TKR_FIELD_EDITOR_ID_PREFIX + fieldID);
+      if (fieldEditor) {
+        _saveFieldValue(fieldID, fieldEditor.value);
+      }
+    }
+
+    var i = 0;
+    while ($('label_' + TKR_currentTemplateIndex + '_' + i)) {
+     $('label_' + TKR_currentTemplateIndex + '_' + i).value =
+         $(TKR_PROMPT_LABELS_EDITOR_ID_PREFIX + i).value;
+     i++;
+    }
+
+    $('admin_names_' + TKR_currentTemplateIndex).value =
+        $(TKR_PROMPT_ADMIN_NAMES_EDITOR_ID).value;
+  }
+}
+
+
+function _saveFieldValue(fieldID, val) {
+  var fieldValId = 'field_value_' + TKR_currentTemplateIndex + '_' + fieldID;
+  $(fieldValId).value = val;
+}
+
+
+/**
+ * This flag indicates that the user had made some edit to some form
+ * field on the page.  Only a few specific pages actually update and use
+ * this flag.
+ */
+var TKR_isDirty = false;
+
+
+/**
+ * This function is called when the user edits a form field on a page that
+ * should offer the user the option to discard his/her edits.
+ */
+function TKR_dirty() {
+  TKR_isDirty = true;
+}
+
+
+/**
+ * The user has clicked the 'Discard' button on the issue update form.
+ * If the form has been edited, ask if he/she is sure about discarding
+ * before then navigating to the given URL.  This can go up to some
+ * other page, or reload the current page with a fresh form.
+ * @param {string} nextUrl The page to show after discarding.
+ */
+function TKR_confirmDiscardUpdate(nextUrl) {
+ if (!TKR_isDirty || confirm(TKR_DISCARD_YOUR_CHANGES)) {
+    document.location = nextUrl;
+ }
+}
+
+
+/**
+ * The user has clicked the 'Discard' button on the issue entry form.
+ * If the form has been edited, this function asks if he/she is sure about
+ * discarding before doing it.
+ * @param {Element} discardButton The 'Discard' button.
+ */
+function TKR_confirmDiscardEntry(discardButton) {
+ if (!TKR_isDirty || confirm(TKR_DISCARD_YOUR_CHANGES)) {
+  TKR_go('list');
+ }
+}
+
+
+/**
+ * Normally, we show 2 rows of label editing fields when updating an issue.
+ * However, if the issue has more than that many labels already, we make sure to
+ * show them all.
+ */
+function TKR_exposeExistingLabelFields() {
+  if ($('label3').value ||
+      $('label4').value ||
+      $('label5').value) {
+    if ($('addrow1')) {
+      _showID('LF_row2');
+      _hideID('addrow1');
+    }
+  }
+  if ($('label6').value ||
+      $('label7').value ||
+      $('label8').value) {
+    _showID('LF_row3');
+    _hideID('addrow2');
+  }
+  if ($('label9').value ||
+      $('label10').value ||
+      $('label11').value) {
+    _showID('LF_row4');
+    _hideID('addrow3');
+  }
+  if ($('label12').value ||
+      $('label13').value ||
+      $('label14').value) {
+    _showID('LF_row5');
+    _hideID('addrow4');
+  }
+  if ($('label15').value ||
+      $('label16').value ||
+      $('label17').value) {
+    _showID('LF_row6');
+    _hideID('addrow5');
+  }
+  if ($('label18').value ||
+      $('label19').value ||
+      $('label20').value) {
+    _showID('LF_row7');
+    _hideID('addrow6');
+  }
+  if ($('label21').value ||
+      $('label22').value ||
+      $('label23').value) {
+    _showID('LF_row8');
+    _hideID('addrow7');
+  }
+}
+
+
+/**
+ * Flag to indicate when the user has not yet caused any input events.
+ * We use this to clear the placeholder in the new issue summary field
+ * exactly once.
+ */
+var TKR_firstEvent = true;
+
+
+/**
+ * This is called in response to almost any user input event on the
+ * issue entry page.  If the placeholder in the new issue sumary field has
+ * not yet been cleared, then this function clears it.
+ */
+function TKR_clearOnFirstEvent() {
+  if (TKR_firstEvent) {
+    TKR_firstEvent = false;
+    $('summary').value = TKR_keepJustSummaryPrefixes($('summary').value);
+  }
+}
+
+/**
+ * Clear the summary, except for any prefixes of the form "[bracketed text]"
+ * or "keyword:".  If there were any, add a trailing space.  This is useful
+ * to people who like to encode issue classification info in the summary line.
+ */
+function TKR_keepJustSummaryPrefixes(s) {
+  var matches = s.match(/^(\[[^\]]+\])+|^(\S+:\s*)+/);
+  if (matches == null) {
+    return '';
+  }
+
+  var prefix = matches[0];
+  if (prefix.substr(prefix.length - 1) != ' ') {
+    prefix += ' ';
+  }
+  return prefix;
+}
+
+/**
+ * An array of label <input>s that start with reserved prefixes.
+ */
+var TKR_labelsWithReservedPrefixes = [];
+
+/**
+ * An array of label <input>s that are equal to reserved words.
+ */
+var TKR_labelsConflictingWithReserved = [];
+
+/**
+ * An array of novel issue status values entered by the user on the
+ * current page. 'Novel' means that they are not well known and are
+ * likely to be typos.  Note that this list will always have zero or
+ * one element, but a list is used for consistency with the list of
+ * novel labels.
+ */
+var TKR_novelStatuses = [];
+
+/**
+ * An array of novel issue label values entered by the user on the
+ * current page. 'Novel' means that they are not well known and are
+ * likely to be typos.
+ */
+var TKR_novelLabels = [];
+
+/**
+ * A boolean that indicates whether the entered owner value is valid or not.
+ */
+var TKR_invalidOwner = false;
+
+/**
+ * The user has changed the issue status text field.  This function
+ * checks whether it is a well-known status value.  If not, highlight it
+ * as a potential typo.
+ * @param {Element} textField The issue status text field.
+ * @returns Always returns true to indicate that the browser should
+ * continue to process the user input event normally.
+ */
+function TKR_confirmNovelStatus(textField) {
+  var v = textField.value.trim().toLowerCase();
+  var isNovel = (v !== '');
+  var wellKnown = TKR_statusWords;
+  for (var i = 0; i < wellKnown.length && isNovel; ++i) {
+    var wk = wellKnown[i];
+    if (v == wk.toLowerCase()) {
+      isNovel = false;
+    }
+  }
+  if (isNovel) {
+    if (TKR_novelStatuses.indexOf(textField) == -1) {
+      TKR_novelStatuses.push(textField);
+    }
+    textField.classList.add(TKR_NOVEL_CLASS);
+  } else {
+    if (TKR_novelStatuses.indexOf(textField) != -1) {
+      TKR_novelStatuses.splice(TKR_novelStatuses.indexOf(textField), 1);
+    }
+    textField.classList.remove(TKR_NOVEL_CLASS);
+  }
+  TKR_updateConfirmBeforeSubmit();
+  return true;
+}
+
+
+/**
+ * The user has changed a issue label text field.  This function checks
+ * whether it is a well-known label value.  If not, highlight it as a
+ * potential typo.
+ * @param {Element} textField An issue label text field.
+ * @returns Always returns true to indicate that the browser should
+ * continue to process the user input event normally.
+ *
+ * TODO(jrobbins): code duplication with function above.
+ */
+function TKR_confirmNovelLabel(textField) {
+  var v = textField.value.trim().toLowerCase();
+  if (v.search('-') == 0) {
+    v = v.substr(1);
+  }
+  var isNovel = (v !== '');
+  if (v.indexOf('?') > -1) {
+    isNovel = false;  // We don't count labels that the user must edit anyway.
+  }
+  var wellKnown = TKR_labelWords;
+  for (var i = 0; i < wellKnown.length && isNovel; ++i) {
+    var wk = wellKnown[i];
+    if (v == wk.toLowerCase()) {
+      isNovel = false;
+    }
+  }
+
+  var containsReservedPrefix = false;
+  var textFieldWarningDisplayed = TKR_labelsWithReservedPrefixes.indexOf(textField) != -1;
+  for (var i = 0; i < TKR_LABEL_RESERVED_PREFIXES.length; ++i) {
+    if (v.startsWith(TKR_LABEL_RESERVED_PREFIXES[i] + '-')) {
+      if (!textFieldWarningDisplayed) {
+        TKR_labelsWithReservedPrefixes.push(textField);
+      }
+      containsReservedPrefix = true;
+      break;
+    }
+  }
+  if (!containsReservedPrefix && textFieldWarningDisplayed) {
+    TKR_labelsWithReservedPrefixes.splice(
+        TKR_labelsWithReservedPrefixes.indexOf(textField), 1);
+  }
+
+  var conflictsWithReserved = false;
+  var textFieldWarningDisplayed =
+      TKR_labelsConflictingWithReserved.indexOf(textField) != -1;
+  for (var i = 0; i < TKR_LABEL_RESERVED_PREFIXES.length; ++i) {
+    if (v == TKR_LABEL_RESERVED_PREFIXES[i]) {
+      if (!textFieldWarningDisplayed) {
+        TKR_labelsConflictingWithReserved.push(textField);
+      }
+      conflictsWithReserved = true;
+      break;
+    }
+  }
+  if (!conflictsWithReserved && textFieldWarningDisplayed) {
+    TKR_labelsConflictingWithReserved.splice(
+        TKR_labelsConflictingWithReserved.indexOf(textField), 1);
+  }
+
+  if (isNovel) {
+    if (TKR_novelLabels.indexOf(textField) == -1) {
+      TKR_novelLabels.push(textField);
+    }
+    textField.classList.add(TKR_NOVEL_CLASS);
+  } else {
+    if (TKR_novelLabels.indexOf(textField) != -1) {
+      TKR_novelLabels.splice(TKR_novelLabels.indexOf(textField), 1);
+    }
+    textField.classList.remove(TKR_NOVEL_CLASS);
+  }
+  TKR_updateConfirmBeforeSubmit();
+  return true;
+}
+
+/**
+ * Dictionary { prefix:[textField,...], ...} for all the prefixes of any
+ * text that has been entered into any label field.  This is used to find
+ * duplicate labels and multiple labels that share an single exclusive
+ * prefix (e.g., Priority).
+ */
+var TKR_usedPrefixes = {};
+
+/**
+ * This is a prefix to the HTML ids of each label editing field.
+ * It varied by page, so it is set in the HTML page.  Needed to initialize
+ * our validation across label input text fields.
+ */
+var TKR_labelFieldIDPrefix = '';
+
+/**
+ * Initialize the set of all used labels on forms that allow users to
+ * enter issue labels.  Some labels are supplied in the HTML page
+ * itself, and we do not want to offer duplicates of those.
+ */
+function TKR_prepLabelAC() {
+  var i = 0;
+  while ($('label'+i)) {
+    TKR_validateLabel($('label'+i));
+    i++;
+  }
+}
+
+/**
+ * Reads the owner field and determines if the current value is a valid member.
+ */
+function TKR_prepOwnerField(validOwners) {
+  if ($('owneredit')) {
+    currentOwner = $('owneredit').value;
+    if (currentOwner == "") {
+      // Empty owner field is not an invalid owner.
+      invalidOwner = false;
+      return;
+    }
+    invalidOwner = true;
+    for (var i = 0; i < validOwners.length; i++) {
+      var owner = validOwners[i].name;
+      if (currentOwner == owner) {
+        invalidOwner = false;
+        break;
+      }
+    }
+    TKR_invalidOwner = invalidOwner;
+  }
+}
+
+/**
+ * Keep track of which label prefixes have been used so that
+ * we can not offer the same label twice and so that we can highlight
+ * multiple labels that share an exclusive prefix.
+ */
+function TKR_updateUsedPrefixes(textField) {
+  if (textField.oldPrefix != undefined) {
+    DeleteArrayElement(TKR_usedPrefixes[textField.oldPrefix], textField);
+  }
+
+  var prefix = textField.value.split('-')[0].toLowerCase();
+  if (TKR_usedPrefixes[prefix] == undefined) {
+    TKR_usedPrefixes[prefix] = [textField];
+  }
+  else {
+    TKR_usedPrefixes[prefix].push(textField);
+  }
+  textField.oldPrefix = prefix;
+}
+
+/**
+ * Go through all the label entry fields in our prefix-oriented
+ * data structure and highlight any that are part of a conflict
+ * (multiple labels with the same exclusive prefix).  Unhighlight
+ * any label text entry fields that are not in conflict.  And, display
+ * a warning message to encourage the user to correct the conflict.
+ */
+function TKR_highlightExclusiveLabelPrefixConflicts() {
+  var conflicts = [];
+  for (var prefix in TKR_usedPrefixes) {
+    var textFields = TKR_usedPrefixes[prefix];
+    if (textFields == undefined || textFields.length == 0) {
+      delete TKR_usedPrefixes[prefix];
+    }
+    else if (textFields.length > 1 &&
+        FindInArray(TKR_exclPrefixes, prefix) != -1) {
+      conflicts.push(prefix);
+      for (var i = 0; i < textFields.length; i++) {
+        var tf = textFields[i];
+        tf.classList.add(TKR_EXCL_CONFICT_CLASS);
+      }
+    } else {
+      for (var i = 0; i < textFields.length; i++) {
+        var tf = textFields[i];
+        tf.classList.remove(TKR_EXCL_CONFICT_CLASS);
+      }
+    }
+  }
+  if (conflicts.length > 0) {
+    var severity = TKR_restrict_to_known ? 'Error' : 'Warning';
+    var confirm_area = $(TKR_CONFIRMAREA_ID);
+    if (confirm_area) {
+      $('confirmmsg').innerText = (severity +
+          ': Multiple values for: ' + conflicts.join(', '));
+      confirm_area.className = TKR_EXCL_CONFICT_CLASS;
+      confirm_area.style.display = '';
+    }
+  }
+}
+
+/**
+ * Keeps track of any label text fields that have a value that
+ * is bad enough to prevent submission of the form.  When this
+ * list is non-empty, the submit button gets disabled.
+ */
+var TKR_labelsBlockingSubmit = [];
+
+/**
+ * Look for any "?" characters in the label and, if found,
+ * make the label text red, prevent form submission, and
+ * display on-page help to tell the user to edit those labels.
+ * @param {Element} textField An issue label text field.
+ */
+function TKR_highlightQuestionMarks(textField) {
+  var tfIndex = TKR_labelsBlockingSubmit.indexOf(textField);
+  if (textField.value.indexOf('?') > -1 && tfIndex == -1) {
+    TKR_labelsBlockingSubmit.push(textField);
+    textField.classList.add(TKR_QUESTION_MARK_CLASS);
+  } else if (textField.value.indexOf('?') == -1 && tfIndex > -1) {
+    TKR_labelsBlockingSubmit.splice(tfIndex, 1);
+    textField.classList.remove(TKR_QUESTION_MARK_CLASS);
+  }
+
+  var block_submit_msg = $('blocksubmitmsg');
+  if (block_submit_msg) {
+    if (TKR_labelsBlockingSubmit.length > 0) {
+      block_submit_msg.innerText = 'You must edit labels that contain "?".';
+    } else {
+      block_submit_msg.innerText = '';
+    }
+  }
+}
+
+/**
+ * The user has edited a label.  Display a warning if the label is
+ * not a well known label, or if there are multiple labels that
+ * share an exclusive prefix.
+ * @param {Element} textField An issue label text field.
+ */
+function TKR_validateLabel(textField) {
+  if (textField == undefined) return;
+  TKR_confirmNovelLabel(textField);
+  TKR_updateUsedPrefixes(textField);
+  TKR_highlightExclusiveLabelPrefixConflicts();
+  TKR_highlightQuestionMarks(textField);
+}
+
+// TODO(jrobbins): what about typos in owner and cc list?
+
+/**
+ * If there are any novel status or label values, we display a message
+ * that explains that to the user so that they can catch any typos before
+ * submitting them.  If the project is restricting input to only the
+ * well-known statuses and labels, then show these as an error instead.
+ * In that case, on-page JS will prevent submission.
+ */
+function TKR_updateConfirmBeforeSubmit() {
+  var severity = TKR_restrict_to_known ? 'Error' : 'Note';
+  var novelWord = TKR_restrict_to_known ? 'undefined' : 'uncommon';
+  var msg = '';
+  var labels = TKR_novelLabels.map(function(item) {
+    return item.value;
+  });
+  if (TKR_novelStatuses.length > 0 && TKR_novelLabels.length > 0) {
+    msg = severity + ': You are using an ' + novelWord + ' status and ' + novelWord + ' label(s): ' + labels.join(', ') + '.'; // TODO: i18n
+  }
+  else if (TKR_novelStatuses.length > 0) {
+    msg = severity + ': You are using an ' + novelWord + ' status value.';
+  }
+  else if (TKR_novelLabels.length > 0) {
+    msg = severity + ': You are using ' + novelWord + ' label(s): ' + labels.join(', ') + '.';
+  }
+
+  for (var i = 0; i < TKR_labelsWithReservedPrefixes.length; ++i) {
+    msg += "\nNote: The label " + TKR_labelsWithReservedPrefixes[i].value +
+           " starts with a reserved word. This is not recommended."
+  }
+  for (var i = 0; i < TKR_labelsConflictingWithReserved.length; ++i) {
+    msg += "\nNote: The label " + TKR_labelsConflictingWithReserved[i].value +
+           " conflicts with a reserved word. This is not recommended."
+  }
+  // Display the owner is no longer a member note only if an owner error is not
+  // already shown on the page.
+  if (TKR_invalidOwner && !$('ownererror')) {
+    msg += "\nNote: Current owner is no longer a project member."
+  }
+
+  var confirm_area = $(TKR_CONFIRMAREA_ID);
+  if (confirm_area) {
+    $('confirmmsg').innerText = msg;
+    if (msg != '') {
+      confirm_area.className = TKR_NOVEL_CLASS;
+      confirm_area.style.display = '';
+    } else {
+      confirm_area.style.display = 'none';
+    }
+  }
+}
+
+
+/**
+ * The user has selected a command from the 'Actions...' menu
+ * on the issue list.  This function checks the selected value and carry
+ * out the requested action.
+ * @param {Element} actionsMenu The 'Actions...' <select> form element.
+ */
+function TKR_handleListActions(actionsMenu) {
+  switch (actionsMenu.value) {
+    case 'bulk':
+      TKR_HandleBulkEdit();
+      break;
+    case 'colspec':
+      TKR_closeAllPopups(actionsMenu);
+      _showID('columnspec');
+      break;
+    case 'flagspam':
+      TKR_flagSpam(true);
+      break;
+    case 'unflagspam':
+      TKR_flagSpam(false);
+      break;
+  }
+  actionsMenu.value = 'moreactions';
+}
+
+
+function TKR_handleDetailActions() {
+  var moreActions = $('more_actions');
+
+  if (moreActions.value == 'delete') {
+    $('copy_issue_form_fragment').style.display = 'none';
+    $('move_issue_form_fragment').style.display = 'none';
+    var ok = confirm(
+      'Normally, you should just close issues by setting their status ' +
+      'to a closed value.\n' +
+      'Are you sure you want to delete this issue?');
+    if (ok) {
+      $('delete_form').submit();
+      return;
+    }
+  }
+
+  if (moreActions.value == 'move') {
+    $('move_issue_form_fragment').style.display = '';
+    $('copy_issue_form_fragment').style.display = 'none';
+    return;
+  }
+  if (moreActions.value == 'copy') {
+    $('copy_issue_form_fragment').style.display = '';
+    $('move_issue_form_fragment').style.display = 'none';
+    return;
+  }
+
+  // If no action was taken, reset the dropdown to the 'More actions...' item.
+  moreActions.value = '0';
+}
+
+/**
+ * The user has selected the "Flag as spam..." menu item.
+ */
+function TKR_flagSpam(isSpam) {
+  var selectedLocalIDs = [];
+  for (var i = 0; i < issueRefs.length; i++) {
+    var checkbox = document.getElementById('cb_' + issueRefs[i]['id']);
+    if (checkbox && checkbox.checked) {
+      selectedLocalIDs.push(issueRefs[i]['id']);
+    }
+  }
+  if (selectedLocalIDs.length > 0) {
+    if (!confirm((isSpam ? 'Flag' : 'Un-flag') +
+          ' all selected issues as spam?')) {
+      return;
+    }
+    var selectedLocalIDString = selectedLocalIDs.join(',');
+    $('bulk_spam_ids').value = selectedLocalIDString;
+    $('bulk_spam_value').value = isSpam;
+
+    var loading = $('bulk-action-loading');
+    loading.style.visibility = 'visible';
+
+    var form = $('bulkspam');
+    form.submit();
+  }
+  else {
+    alert('Please select some issues to flag as spam');
+  }
+}
+
+/**
+ * The user has selected the "Bulk Edit..." menu item.  Go to a page that
+ * offers the ability to edit all selected issues.
+ */
+// TODO(jrobbins): cross-project bulk edit
+function TKR_HandleBulkEdit() {
+  var selectedLocalIDs = [];
+  for (var i = 0; i < issueRefs.length; i++) {
+    var checkbox = document.getElementById('cb_' + issueRefs[i]['id']);
+    if (checkbox && checkbox.checked) {
+      selectedLocalIDs.push(issueRefs[i]['id']);
+    }
+  }
+  if (selectedLocalIDs.length > 0) {
+    var selectedLocalIDString = selectedLocalIDs.join(',');
+    var url = 'bulkedit?ids=' + selectedLocalIDString;
+    TKR_go(url + _ctxArgs);
+  }
+  else {
+    alert('Please select some issues to edit');
+  }
+}
+
+
+/**
+ * Array of original labels on the served page, so that we can notice
+ * when the used submits a form that has any Restrict-* labels removed.
+ */
+var TKR_allOrigLabels = [];
+
+
+/**
+ * Prevent users from easily entering "+1" comments.
+ */
+function TKR_checkPlusOne() {
+  var c = $('addCommentTextArea').value;
+  var instructions = (
+      '\nPlease use the star icon instead.\n' +
+      'Stars show your interest without annoying other users.');
+  if (new RegExp('^\\s*[-+]+[0-9]+\\s*.{0,30}$', 'm').test(c) &&
+      c.length < 150) {
+    alert('This looks like a "+1" comment.' + instructions);
+    return false;
+  }
+  if (new RegExp('^\\s*me too.{0,30}$', 'i').test(c)) {
+    alert('This looks like a "me too" comment.' + instructions);
+    return false;
+  }
+  return true;
+}
+
+
+/**
+ * If the user removes Restrict-* labels, ask them if they are sure.
+ */
+function TKR_checkUnrestrict(prevent_restriction_removal) {
+  var removedRestrictions = [];
+
+  for (var i = 0; i < TKR_allOrigLabels.length; ++i) {
+    var origLabel = TKR_allOrigLabels[i];
+    if (origLabel.indexOf('Restrict-') == 0) {
+      var found = false;
+      var j = 0;
+      while ($('label' + j)) {
+        var newLabel = $('label' + j).value;
+        if (newLabel == origLabel) {
+          found = true;
+          break;
+        }
+        j++;
+      }
+      if (!found) {
+        removedRestrictions.push(origLabel);
+      }
+    }
+  }
+
+  if (removedRestrictions.length == 0) {
+    return true;
+  }
+
+  if (prevent_restriction_removal) {
+    var msg = 'You may not remove restriction labels.';
+    alert(msg);
+    return false;
+  }
+
+   var instructions = (
+      'You are removing these restrictions:\n   ' +
+      removedRestrictions.join('\n   ') +
+      '\nThis may allow more people to access this issue.' +
+      '\nAre you sure?');
+   return confirm(instructions);
+}
+
+
+/**
+ * Add a column to a list view by updating the colspec form element and
+ * submiting an invisible <form> to load a new page that includes the column.
+ * @param {string} colname The name of the column to start showing.
+ */
+function TKR_addColumn(colname) {
+  var colspec = TKR_getColspecElement();
+  colspec.value = colspec.value + ' ' + colname;
+  $('colspecform').submit();
+}
+
+
+/**
+ * Allow members to shift-click to select multiple issues.  This keeps
+ * track of the last row that the user clicked a checkbox on.
+ */
+var TKR_lastSelectedRow = undefined;
+
+
+/**
+ * Return true if an event had the shift-key pressed.
+ * @param {Event} evt The mouse click event.
+ */
+function TKR_hasShiftKey(evt) {
+  evt = (evt) ? evt : (window.event) ? window.event : '';
+  if (evt) {
+    if (evt.modifiers) {
+      return evt.modifiers & Event.SHIFT_MASK;
+    } else {
+      return evt.shiftKey;
+    }
+  }
+  return false;
+}
+
+
+/**
+ * Select one row: check the checkbox and use highlight color.
+ * @param {Element} row the row containing the checkbox that the user clicked.
+ * @param {boolean} checked True if the user checked the box.
+ */
+function TKR_rangeSelectRow(row, checked) {
+  if (!row) {
+    return;
+  }
+  if (checked) {
+    row.classList.add('selected');
+  } else {
+    row.classList.remove('selected');
+  }
+
+  var td = row.firstChild;
+  while (td && td.tagName != 'TD') {
+    td = td.nextSibling;
+  }
+  if (!td) {
+    return;
+  }
+
+  var checkbox = td.firstChild;
+  while (checkbox && checkbox.tagName != 'INPUT') {
+    checkbox = checkbox.nextSibling;
+  }
+  if (!checkbox) {
+    return;
+  }
+
+  checkbox.checked = checked;
+}
+
+
+/**
+ * If the user shift-clicked a checkbox, (un)select a range.
+ * @param {Event} evt The mouse click event.
+ * @param {Element} el The checkbox that was clicked.
+ */
+function TKR_checkRangeSelect(evt, el) {
+  var clicked_row = el.parentNode.parentNode.rowIndex;
+  if (clicked_row == TKR_lastSelectedRow) {
+    return;
+  }
+  if (TKR_hasShiftKey(evt) && TKR_lastSelectedRow != undefined) {
+    var results_table = $('resultstable');
+    var delta = (clicked_row > TKR_lastSelectedRow) ? 1 : -1;
+    for (var i = TKR_lastSelectedRow; i != clicked_row; i += delta) {
+      TKR_rangeSelectRow(results_table.rows[i], el.checked);
+    }
+  }
+  TKR_lastSelectedRow = clicked_row;
+}
+
+
+/**
+ * Make a link to a given issue that includes context parameters that allow
+ * the user to see the same list columns, sorting, query, and pagination state
+ * if he/she ever navigates up to the list again.
+ * @param {{issue_url: string}} issueRef The dict with info about an issue,
+ *     including a url to the issue detail page.
+ */
+function TKR_makeIssueLink(issueRef) {
+  return '/p/' + issueRef['project_name'] + '/issues/detail?id=' + issueRef['id'] + _ctxArgs;
+}
+
+
+/**
+ * Hide or show a list column in the case where we already have the
+ * data for that column on the page.
+ * @param {number} colIndex index of the column that is being shown or hidden.
+ */
+function TKR_toggleColumnUpdate(colIndex) {
+  var shownCols = TKR_getColspecElement().value.split(' ');
+  var filteredCols = [];
+  for (var i=0; i< shownCols.length; i++) {
+    if (_allColumnNames[colIndex] != shownCols[i].toLowerCase()) {
+      filteredCols.push(shownCols[i]);
+    }
+  }
+
+  TKR_getColspecElement().value = filteredCols.join(' ');
+  TKR_getSearchColspecElement().value = filteredCols.join(' ');
+  TKR_toggleColumn('hide_col_' + colIndex);
+}
+
+
+/**
+ * Convert a column into a groupby clause by removing it from the column spec
+ * and adding it to the groupby spec, then reloading the page.
+ * @param {number} colIndex index of the column that is being shown or hidden.
+ */
+function TKR_addGroupBy(colIndex) {
+  var colName = _allColumnNames[colIndex];
+  var shownCols = TKR_getColspecElement().value.split(' ');
+  var filteredCols = [];
+  for (var i=0; i < shownCols.length; i++) {
+    if (shownCols[i] && colName != shownCols[i].toLowerCase()) {
+      filteredCols.push(shownCols[i]);
+    }
+  }
+
+  TKR_getColspecElement().value = filteredCols.join(' ');
+  TKR_getSearchColspecElement().value = filteredCols.join(' ');
+
+  var groupSpec = $('groupbyspec');
+  var shownGroupings = groupSpec.value.split(' ');
+  var filteredGroupings = [];
+  for (i=0; i < shownGroupings.length; i++) {
+    if (shownGroupings[i] && colName != shownGroupings[i].toLowerCase()) {
+      filteredGroupings.push(shownGroupings[i]);
+    }
+  }
+  filteredGroupings.push(colName);
+  groupSpec.value = filteredGroupings.join(' ');
+  $('colspecform').submit();
+}
+
+
+/**
+ * Add a multi-valued custom field editing widget.
+ */
+function TKR_addMultiFieldValueWidget(
+    el, field_id, field_type, opt_validate_1, opt_validate_2) {
+  var widget = document.createElement('INPUT');
+  widget.name = 'custom_' + field_id;
+  if (field_type == 'str') {
+    widget.size = 90;
+  }
+  if (field_type == 'user') {
+    widget.style = 'width:12em';
+  }
+  if (field_type == 'int') {
+    widget.style.textAlign = 'right';
+    widget.style.width = '12em';
+    widget.type = 'number';
+    widget.min = opt_validate_1;
+    widget.max = opt_validate_2;
+  }
+  el.parentNode.insertBefore(widget, el);
+
+  var del_button = document.createElement('U');
+  del_button.onclick = function(event) {
+      _removeMultiFieldValueWidget(event.target);
+  };
+  del_button.innerText = 'X';
+  el.parentNode.insertBefore(del_button, el);
+}
+
+
+function TKR_removeMultiFieldValueWidget(el) {
+  var target = el.previousSibling;
+  while (target && target.tagName != 'INPUT') {
+    target = target.previousSibling;
+  }
+  if (target) {
+    el.parentNode.removeChild(target);
+  }
+  el.parentNode.removeChild(el);  // the X itself
+}
+
+
+/**
+ * Trim trailing commas and spaces off <INPUT type="email" multiple> fields
+ * before submitting the form.
+ */
+function TKR_trimCommas() {
+  var ccField = $('memberccedit');
+  if (ccField) {
+    ccField.value = ccField.value.replace(/,\s*$/, '');
+   }
+  ccField = $('memberenter');
+  if (ccField) {
+    ccField.value = ccField.value.replace(/,\s*$/, '');
+   }
+}