Inline form element path

core/src/main/java/jenkins/formelementpath/FormElementPathPageDecorator.java

@@ -0,0 +1,20 @@
+package jenkins.formelementpath;
+
+import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
+import hudson.Extension;
+import hudson.Main;
+import hudson.model.PageDecorator;
+import jenkins.util.SystemProperties;
+
+@Extension
+public class FormElementPathPageDecorator extends PageDecorator {
+
+    @SuppressFBWarnings("MS_SHOULD_BE_FINAL")
+    private static /*almost final */ boolean ENABLED = Main.isUnitTest ||
+            SystemProperties.getBoolean(FormElementPathPageDecorator.class.getName() + ".enabled");
+
+    public boolean isEnabled() {
+        return ENABLED;
+    }
+
+}

core/src/main/resources/jenkins/formelementpath/FormElementPathPageDecorator/footer.jelly

@@ -0,0 +1,6 @@
+<?jelly escape-by-default='true'?>
+<j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler">
+  <j:if test="${it.enabled}">
+    <st:adjunct includes="jenkins.formelementpath.form-element-path"/>
+  </j:if>
+</j:jelly>

core/src/main/resources/jenkins/formelementpath/form-element-path.js

@@ -0,0 +1,196 @@
+/**
+ * Adds a 'path' attribute to form elements in the DOM.
+ * This is useful for providing stable selectors for UI testing.
+ *
+ * Instead of selecting by xpath with something like div/span/input[text() = 'Name']
+ * You can use the path attribute: /org-jenkinsci-plugins-workflow-libs-FolderLibraries/libraries/name
+ */
+document.addEventListener("DOMContentLoaded", function(){
+    // most of this is copied from hudson-behaviour.js
+    function buildFormTree(form) {
+        form.formDom = {}; // root object
+
+        var doms = []; // DOMs that we added 'formDom' for.
+        doms.push(form);
+
+        function addProperty(parent, name, value) {
+            name = shortenName(name);
+            if (parent[name] != null) {
+                if (parent[name].push == null) // is this array?
+                    parent[name] = [parent[name]];
+                parent[name].push(value);
+            } else {
+                parent[name] = value;
+            }
+        }
+
+        // find the grouping parent node, which will have @name.
+        // then return the corresponding object in the map
+        function findParent(e) {
+            var p = findFormParent(e, form);
+            if (p == null) return {};
+
+            var m = p.formDom;
+            if (m == null) {
+                // this is a new grouping node
+                doms.push(p);
+                p.formDom = m = {};
+                addProperty(findParent(p), p.getAttribute("name"), p);
+            }
+            return m;
+        }
+
+        var jsonElement = null;
+
+        for (var i = 0; i < form.elements.length; i++) {
+            var e = form.elements[i];
+            if (e.name == "json") {
+                jsonElement = e;
+                continue;
+            }
+            if (e.tagName == "FIELDSET")
+                continue;
+            if (e.tagName == "SELECT" && e.multiple) {
+                addProperty(findParent(e), e.name, e);
+                continue;
+            }
+
+            var p;
+            var type = e.getAttribute("type");
+            if (type == null) type = "";
+            switch (type.toLowerCase()) {
+                case "button":
+                    var element
+                    // modern buttons aren't wrapped in spans
+                    if (e.classList.contains('jenkins-button')) {
+                        element = e
+                    } else {
+                        p = findParent(e);
+                        element = e.parentNode.parentNode; // YUI's surrounding <SPAN> that has interesting classes
+                    }
+                    var name = null;
+                    ["repeatable-add", "repeatable-delete", "hetero-list-add", "expand-button", "advanced-button", "apply-button", "validate-button"]
+                        .forEach(function (clazz) {
+                            if (element.classList.contains(clazz)) {
+                                name = clazz;
+                            }
+                        });
+                    if (name == null) {
+                        if (name == null) {
+                            element = element.parentNode.previousSibling;
+                            if (element != null && element.classList && element.classList.contains('repeatable-insertion-point')) {
+                                name = "hetero-list-add";
+                            }
+                        }
+                    }
+                    if (name != null) {
+                        addProperty(p, name, e);
+                    }
+                    break;
+                case "submit":
+                    break;
+                case "checkbox":
+                case "radio":
+                    p = findParent(e);
+                    if (e.groupingNode) {
+                        e.formDom = {};
+                    }
+                    addProperty(p, e.name, e);
+                    break;
+                case "file":
+                    // to support structured form submission with file uploads,
+                    // rename form field names to unique ones, and leave this name mapping information
+                    // in JSON. this behavior is backward incompatible, so only do
+                    // this when
+                    p = findParent(e);
+                    if (e.getAttribute("jsonAware") != null) {
+                        var on = e.getAttribute("originalName");
+                        if (on != null) {
+                            addProperty(p, on, e);
+                        } else {
+                            addProperty(p, e.name, e);
+                        }
+                    }
+                    break;
+                // otherwise fall through
+                default:
+                    p = findParent(e);
+                    addProperty(p, e.name, e);
+                    break;
+            }
+        }
+
+        function annotate(e, path) {
+            e.setAttribute("path", path);
+            var o = e.formDom || {};
+            for (var key in o) {
+                var v = o[key];
+
+                function child(v, i) {
+                    var suffix = null;
+                    var newKey = key;
+                    if (v.parentNode.className && v.parentNode.className.indexOf("one-each") > -1 && v.parentNode.className.indexOf("honor-order") > -1) {
+                        suffix = v.getAttribute("descriptorId").split(".").pop()
+                    } else if (v.getAttribute("type") == "radio") {
+                        suffix = v.value
+                        while (newKey.substring(0, 8) == 'removeme')
+                            newKey = newKey.substring(newKey.indexOf('_', 8) + 1);
+                    } else if (v.getAttribute("suffix") != null) {
+                        suffix = v.getAttribute("suffix")
+                    } else {
+                        if (i > 0)
+                            suffix = i;
+                    }
+                    if (suffix == null) suffix = "";
+                    else suffix = '[' + suffix + ']';
+
+                    annotate(v, path + "/" + newKey + suffix);
+                }
+
+                if (v instanceof Array) {
+                    var i = 0;
+                    v.forEach(function (v) {
+                        child(v, i++)
+                    })
+                } else {
+                    child(v, 0)
+                }
+            }
+
+        }
+
+        annotate(form, "");
+
+        // clean up
+        for (i = 0; i < doms.length; i++)
+            doms[i].formDom = null;
+
+        return true;
+    }
+
+    function applyAll() {
+        document.querySelectorAll("FORM").forEach(function (e) {
+            buildFormTree(e);
+        })
+    }
+
+    /* JavaScript sometimes re-arranges the DOM and doesn't call layout callback
+     * known cases: YUI buttons, CodeMirror.
+     * We run apply twice to work around this, once immediately so that most cases work and the tests don't need to wait,
+     * and once to catch the edge cases.
+      */
+    function hardenedApplyAll () {
+        applyAll();
+
+        setTimeout(function () {
+            applyAll();
+        }, 1000);
+    }
+
+    hardenedApplyAll();
+
+    layoutUpdateCallback.add(hardenedApplyAll)
+
+    // expose this globally so that Selenium can call it
+    window.recomputeFormElementPath = hardenedApplyAll;
+});

core/src/main/resources/lib/form/repeatable/repeatable.js

@@ -121,8 +121,10 @@ var repeatableSupport = {
         a.onComplete.subscribe(function() {
             var p = n.parentNode;
             p.removeChild(n);
-            if (p.tag)
+            if (p.tag) {
                 p.tag.update();
+            }
+            layoutUpdateCallback.call();
         });
         a.animate();
     },
@@ -145,6 +147,7 @@ var repeatableSupport = {
                 updateOptionalBlock(input, false);
             }
         }
+        layoutUpdateCallback.call();
     }
 };
 
@@ -185,7 +188,7 @@ Behaviour.specify("INPUT.repeatable-delete", 'repeatable', 0, function(e) {
         e = be = null; // avoid memory leak
     });
 
-    // radio buttons in repeatable content
+// radio buttons in repeatable content
 // Needs to run before the radioBlock behavior so that names are already unique.
 Behaviour.specify("DIV.repeated-chunk", 'repeatable', -200, function(d) {
         var inputs = d.getElementsByTagName('INPUT');