This updates the StaticIP configuration UI to match new mocks.

chrome/browser/resources/options2/editable_text_field.js

+// Copyright (c) 2012 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.
+
+cr.define('options', function() {
+  var EditableTextField = cr.ui.define('div');
+
+  /**
+   * Decorates an element as an editable text field.
+   * @param {!HTMLElement} el The element to decorate.
+   */
+  EditableTextField.decorate = function(el) {
+    el.__proto__ = EditableTextField.prototype;
+    el.decorate();
+  };
+
+  EditableTextField.prototype = {
+    __proto__: HTMLDivElement.prototype,
+
+    /**
+     * The actual input element in this field.
+     * @type {HTMLElement}

[Dan Beam, 2012/08/14 03:59:56]

nit: I think these are all technically supposed to have a ? in front of the
@type, e.g. {?HTMLElement}, but I'm not totally sure. Annotating @types for (at
least for closure) are confusing in this sense as they say complex type are
"nullable" but this actually means @type {HTMLElement} creates a type list of
(HTMLElement|undefined) but doesn't include null.

tl;dr - {?HTMLElement}, also we don't even compile this code, so it's just for
the future folks that try to do this.

[Greg Spencer (Chromium), 2012/08/14 16:54:53]

OK, understood.  Done.

+     * @private
+     */
+    editField_: null,
+
+    /**
+     * The static text displayed when this field isn't editable.
+     * @type {HTMLElement}
+     * @private
+     */
+    staticText_: null,
+
+    /**
+     * The data model for this field.
+     * @type {Object}
+     * @private
+     */
+    model_: null,
+
+    /**
+     * Whether or not the current edit should be considered canceled, rather
+     * than committed, when editing ends.
+     * @type {boolean}
+     * @private
+     */
+    editCanceled_: true,
+
+    /** @inheritDoc */
+    decorate: function() {
+      this.classList.add('editable-text-field');
+
+      this.createEditableTextCell();
+
+      if (this.hasAttribute('i18n-placeholder-text')) {
+        var identifier = this.getAttribute('i18n-placeholder-text');
+        var localizedText = loadTimeData.getString(identifier);
+        if (localizedText)
+          this.setAttribute('placeholder-text', localizedText);
+      }
+
+      this.addEventListener('keydown', this.handleKeyDown_);
+      this.editField_.addEventListener('focus', this.handleFocus_.bind(this));
+      this.editField_.addEventListener('blur', this.handleBlur_.bind(this));
+      this.checkForEmpty_();
+    },
+
+    /**
+     * Indicates that this field has no value in the model, and the placeholder
+     * text (if any) should be shown.
+     * @type {boolean}
+     */
+    get empty() {
+      return this.hasAttribute('empty');
+    },
+
+    /**
+     * The placeholder text to be used when the model or its value is empty.
+     * @type {string}
+     */
+    get placeholderText() {
+      return this.getAttribute('placeholder-text');
+    },
+    set placeholderText(text) {
+      if (text)
+        this.setAttribute('placeholder-text', text);
+      else
+        this.removeAttribute('placeholder-text');
+
+      this.checkForEmpty_();
+    },
+
+    /**
+     * Returns the input element in this text field.
+     * @type {HTMLElement} The element that is the actual input field.
+     */
+    get editField() {
+      return this.editField_;
+    },
+
+    /**
+     * Whether the user is currently editing the list item.
+     * @type {boolean}
+     */
+    get editing() {
+      return this.hasAttribute('editing');
+    },
+    set editing(editing) {
+      if (this.editing == editing)
+        return;
+
+      if (editing)
+        this.setAttribute('editing', '');
+      else
+        this.removeAttribute('editing');
+
+      if (editing) {
+        this.editCanceled_ = false;
+
+        if (this.empty) {
+          this.removeAttribute('empty');
+          if (this.editField)
+            this.editField.value = '';
+        }
+        if (this.editField) {
+          this.editField.focus();
+          this.editField.select();
+        }
+      } else {
+        if (!this.editCanceled_ && this.hasBeenEdited &&
+            this.currentInputIsValid) {
+          this.updateStaticValues_();
+          cr.dispatchSimpleEvent(this, 'commitedit', true);
+        } else {
+          this.resetEditableValues_();
+          cr.dispatchSimpleEvent(this, 'canceledit', true);
+        }
+        this.checkForEmpty_();
+      }
+    },
+
+    /**
+     * Whether the item is editable.
+     * @type {boolean}
+     */
+    get editable() {
+      return this.hasAttribute('editable');
+    },
+    set editable(editable) {
+      if (this.editable == editable)
+        return;
+
+      if (editable)
+        this.setAttribute('editable', '');
+      else
+        this.removeAttribute('editable');
+      this.editable_ = editable;
+    },
+
+    /**
+     * The data model for this field.
+     * @type {Object}
+     */
+    get model() {
+      return this.model_;
+    },
+    set model(model) {
+      this.model_ = model;
+      this.checkForEmpty_();  // This also updates the editField value.
+      this.updateStaticValues_();
+    },
+
+    /**
+     * The HTML element that should have focus initially when editing starts,
+     * if a specific element wasn't clicked. Defaults to the first <input>
+     * element; can be overridden by subclasses if a different element should be
+     * focused.
+     * @type {?HTMLElement}
+     */
+    get initialFocusElement() {
+      return this.querySelector('input');
+    },
+
+    /**
+     * Whether the input in currently valid to submit. If this returns false
+     * when editing would be submitted, either editing will not be ended,
+     * or it will be cancelled, depending on the context. Can be overridden by
+     * subclasses to perform input validation.
+     * @type {boolean}
+     */
+    get currentInputIsValid() {
+      return true;
+    },
+
+    /**
+     * Returns true if the item has been changed by an edit. Can be overridden
+     * by subclasses to return false when nothing has changed to avoid
+     * unnecessary commits.
+     * @type {boolean}
+     */
+    get hasBeenEdited() {
+      return true;
+    },
+
+    /**
+     * Mutates the input during a successful commit.  Can be overridden to
+     * provide a way to "clean up" valid input so that it conforms to a
+     * desired format.  Will only be called when commit succeeds for valid
+     * input, or when the model is set.
+     * @param {String} value Input text to be mutated.

[Dan Beam, 2012/08/14 03:59:56]

nit: I think technically these should be {string} vs {String} as they're not a
new String() (i.e. instanceof String, the wrapper class)

[Greg Spencer (Chromium), 2012/08/14 16:54:53]

Done.

+     * @return {String} mutated text.
+     */
+    mutateInput: function(value) {
+      return value;
+    },
+
+    /**
+     * Creates a div containing an <input>, as well as static text, keeping
+     * references to them so they can be manipulated.
+     * @param {string} text The text of the cell.
+     * @private
+     */
+    createEditableTextCell: function(text) {
+      // This function should only be called once.
+      if (this.editField_)
+        return;
+
+      var container = this.ownerDocument.createElement('div');
+
+      var textEl = this.ownerDocument.createElement('div');
+      textEl.className = 'static-text';
+      textEl.textContent = text;
+      textEl.setAttribute('displaymode', 'static');
+      this.appendChild(textEl);
+      this.staticText_ = textEl;
+
+      var inputEl = this.ownerDocument.createElement('input');
+      inputEl.className = 'editable-text';
+      inputEl.type = 'text';
+      inputEl.value = text;
+      inputEl.setAttribute('displaymode', 'edit');
+      inputEl.staticVersion = textEl;
+      this.appendChild(inputEl);
+      this.editField_ = inputEl;
+    },
+
+    /**
+     * Resets the editable version of any controls created by
+     * createEditableTextCell to match the static text.
+     * @private
+     */
+    resetEditableValues_: function() {
+      var editField = this.editField_;
+      var staticLabel = editField.staticVersion;
+      if (!staticLabel)
+        return;
+
+      if (editField instanceof HTMLInputElement)
+        editField.value = staticLabel.textContent;
+
+      editField.setCustomValidity('');
+    },
+
+    /**
+     * Sets the static version of any controls created by createEditableTextCell
+     * to match the current value of the editable version. Called on commit so
+     * that there's no flicker of the old value before the model updates.  Also
+     * updates the model's value with the mutated value of the edit field.
+     * @private
+     */
+    updateStaticValues_: function() {
+      var editField = this.editField_;
+      var staticLabel = editField.staticVersion;
+      if (!staticLabel)
+        return;
+
+      if (editField.tagName == 'INPUT') {

[Dan Beam, 2012/08/14 03:59:56]

nit: same nit as before - editField instanceof HTMLInputElement

[Greg Spencer (Chromium), 2012/08/14 16:54:53]

Done.

+        staticLabel.textContent = editField.value;
+        this.model_.value = this.mutateInput(editField.value);
+      }
+    },
+
+    /**
+     * Checks to see if the model or its value are empty.  If they are, then set
+     * the edit field to the placeholder text, if any, and if not, set it to the
+     * model's value.
+     * @private
+     */
+    checkForEmpty_: function() {
+      var editField = this.editField_;
+      if (!editField)
+        return;
+
+      if (!this.model_ || !this.model_.value) {
+        this.setAttribute('empty', '');
+        editField.value = this.placeholderText ? this.placeholderText : '';

[Dan Beam, 2012/08/14 03:59:56]

nit: this.placeHolderText || ''

[Greg Spencer (Chromium), 2012/08/14 16:54:53]

Done.

+      } else {
+        this.removeAttribute('empty');
+        editField.value = this.model_.value;
+      }
+    },
+
+    /**
+     * Called when this widget receives focus.
+     * @param {Event} e the focus event.
+     * @private
+     */
+    handleFocus_: function(e) {
+      if (this.editing)
+        return;

[Dan Beam, 2012/08/14 03:59:56]

nit: \n after if ()

[Greg Spencer (Chromium), 2012/08/14 16:54:53]

Done.

+      this.editing = true;
+      if (this.editField_)
+        this.editField_.focus();
+    },
+
+    /**
+     * Called when this widget loses focus.
+     * @param {Event} e the blur event.
+     * @private
+     */
+    handleBlur_: function(e) {
+      if (!this.editing)
+        return;

[Dan Beam, 2012/08/14 03:59:56]

nit: \n after if ()

[Greg Spencer (Chromium), 2012/08/14 16:54:53]

Done.

+      this.editing = false;
+    },
+
+    /**
+     * Called when a key is pressed. Handles committing and canceling edits.
+     * @param {Event} e The key down event.
+     * @private
+     */
+    handleKeyDown_: function(e) {
+      if (!this.editing)
+        return;
+
+      var endEdit = false;

[Dan Beam, 2012/08/14 03:59:56]

nit: you don't really need to initialize this to false, but I guess it doesn't
hurt... (ah the typeless world!)

[Greg Spencer (Chromium), 2012/08/14 16:54:53]

Hmm.  Good point. :)  It seems wrong somehow to leave it as "undefined" to
indicate "false" though.  It works just fine, of course.  I guess I'll embrace
typeless coding and leave it undefined.

+      switch (e.keyIdentifier) {
+        case 'U+001B':  // Esc
+          this.editCanceled_ = true;
+          endEdit = true;
+          break;
+        case 'Enter':
+          if (this.currentInputIsValid)
+            endEdit = true;
+          break;
+      }
+
+      if (endEdit) {
+        // Blurring will trigger the edit to end.
+        this.ownerDocument.activeElement.blur();
+        // Make sure that handled keys aren't passed on and double-handled.
+        // (e.g., esc shouldn't both cancel an edit and close a subpage)
+        e.stopPropagation();
+      }
+    },
+  };
+
+  /**
+   * Takes care of committing changes to EditableTextField items when the
+   * window loses focus.
+   */
+  window.addEventListener('blur', function(e) {
+    var itemAncestor = findAncestor(document.activeElement, function(node) {
+      return node instanceof EditableTextField;
+    });
+    if (itemAncestor)
+      document.activeElement.blur();
+  });
+
+  return {
+    EditableTextField: EditableTextField,
+  };
+});