DevTools: reformat front-end code to match chromium style.

third_party/WebKit/Source/devtools/front_end/ui/TextPrompt.js

Index: third_party/WebKit/Source/devtools/front_end/ui/TextPrompt.js
diff --git a/third_party/WebKit/Source/devtools/front_end/ui/TextPrompt.js b/third_party/WebKit/Source/devtools/front_end/ui/TextPrompt.js
index 5bccf6fa1966d3b9bcf28da25e82a5408e03df8a..4866d067f770a1ad358e81b5c6a4a224ab8d1a97 100644
--- a/third_party/WebKit/Source/devtools/front_end/ui/TextPrompt.js
+++ b/third_party/WebKit/Source/devtools/front_end/ui/TextPrompt.js
@@ -26,645 +26,620 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
-
 /**
- * @constructor
- * @extends {WebInspector.Object}
  * @implements {WebInspector.SuggestBoxDelegate}
+ * @unrestricted
  */
-WebInspector.TextPrompt = function()
-{
+WebInspector.TextPrompt = class extends WebInspector.Object {
+  constructor() {
+    super();
     /**
      * @type {!Element|undefined}
      */
     this._proxyElement;
-    this._proxyElementDisplay = "inline-block";
+    this._proxyElementDisplay = 'inline-block';
     this._autocompletionTimeout = WebInspector.TextPrompt.DefaultAutocompletionTimeout;
-    this._title = "";
+    this._title = '';
     this._prefixRange = null;
-    this._previousText = "";
-    this._currentSuggestion = "";
+    this._previousText = '';
+    this._currentSuggestion = '';
     this._completionRequestId = 0;
-    this._ghostTextElement = createElementWithClass("span", "auto-complete-text");
+    this._ghostTextElement = createElementWithClass('span', 'auto-complete-text');
+  }
+
+  /**
+   * @param {function(!Element, !Range, boolean, function(!Array.<string>, number=))} completions
+   * @param {string=} stopCharacters
+   */
+  initialize(completions, stopCharacters) {
+    this._loadCompletions = completions;
+    this._completionStopCharacters = stopCharacters || ' =:[({;,!+-*/&|^<>.';
+  }
+
+  /**
+   * @param {number} timeout
+   */
+  setAutocompletionTimeout(timeout) {
+    this._autocompletionTimeout = timeout;
+  }
+
+  /**
+   * @param {boolean} suggestBoxEnabled
+   */
+  setSuggestBoxEnabled(suggestBoxEnabled) {
+    this._suggestBoxEnabled = suggestBoxEnabled;
+  }
+
+  renderAsBlock() {
+    this._proxyElementDisplay = 'block';
+  }
+
+  /**
+   * Clients should never attach any event listeners to the |element|. Instead,
+   * they should use the result of this method to attach listeners for bubbling events.
+   *
+   * @param {!Element} element
+   * @return {!Element}
+   */
+  attach(element) {
+    return this._attachInternal(element);
+  }
+
+  /**
+   * Clients should never attach any event listeners to the |element|. Instead,
+   * they should use the result of this method to attach listeners for bubbling events
+   * or the |blurListener| parameter to register a "blur" event listener on the |element|
+   * (since the "blur" event does not bubble.)
+   *
+   * @param {!Element} element
+   * @param {function(!Event)} blurListener
+   * @return {!Element}
+   */
+  attachAndStartEditing(element, blurListener) {
+    var proxyElement = this._attachInternal(element);
+    this._startEditing(blurListener);
+    return proxyElement;
+  }
+
+  /**
+   * @param {!Element} element
+   * @return {!Element}
+   */
+  _attachInternal(element) {
+    if (this._proxyElement)
+      throw 'Cannot attach an attached TextPrompt';
+    this._element = element;
+
+    this._boundOnKeyDown = this.onKeyDown.bind(this);
+    this._boundOnInput = this.onInput.bind(this);
+    this._boundOnMouseWheel = this.onMouseWheel.bind(this);
+    this._boundClearAutocomplete = this.clearAutocomplete.bind(this);
+    this._proxyElement = element.ownerDocument.createElement('span');
+    var shadowRoot = WebInspector.createShadowRootWithCoreStyles(this._proxyElement, 'ui/textPrompt.css');
+    this._contentElement = shadowRoot.createChild('div');
+    this._contentElement.createChild('content');
+    this._proxyElement.style.display = this._proxyElementDisplay;
+    element.parentElement.insertBefore(this._proxyElement, element);
+    this._proxyElement.appendChild(element);
+    this._element.classList.add('text-prompt');
+    this._element.addEventListener('keydown', this._boundOnKeyDown, false);
+    this._element.addEventListener('input', this._boundOnInput, false);
+    this._element.addEventListener('mousewheel', this._boundOnMouseWheel, false);
+    this._element.addEventListener('selectstart', this._boundClearAutocomplete, false);
+    this._element.addEventListener('blur', this._boundClearAutocomplete, false);
+    this._element.ownerDocument.defaultView.addEventListener('resize', this._boundClearAutocomplete, false);
+
+    if (this._suggestBoxEnabled)
+      this._suggestBox = new WebInspector.SuggestBox(this, 20, true);
+
+    if (this._title)
+      this._proxyElement.title = this._title;
+
+    return this._proxyElement;
+  }
+
+  detach() {
+    this._removeFromElement();
+    this._proxyElement.parentElement.insertBefore(this._element, this._proxyElement);
+    this._proxyElement.remove();
+    delete this._proxyElement;
+    this._element.classList.remove('text-prompt');
+    this._focusRestorer.restore();
+  }
+
+  /**
+   * @return {string}
+   */
+  textWithCurrentSuggestion() {
+    return this._element.textContent;
+  }
+
+  /**
+   * @return {string}
+   */
+  text() {
+    var text = this.textWithCurrentSuggestion();
+    if (this._ghostTextElement.parentNode) {
+      var addition = this._ghostTextElement.textContent;
+      text = text.substring(0, text.length - addition.length);
+    }
+    return text;
+  }
+
+  /**
+   * @param {string} x
+   */
+  setText(x) {
+    this.clearAutocomplete();
+    if (!x) {
+      // Append a break element instead of setting textContent to make sure the selection is inside the prompt.
+      this._element.removeChildren();
+      this._element.createChild('br');
+    } else {
+      this._element.textContent = x;
+    }
+    this._previousText = this.text();
+
+    this.moveCaretToEndOfPrompt();
+    this._element.scrollIntoView();
+  }
+
+  /**
+   * @return {string}
+   */
+  title() {
+    return this._title;
+  }
+
+  /**
+   * @param {string} title
+   */
+  setTitle(title) {
+    this._title = title;
+    if (this._proxyElement)
+      this._proxyElement.title = title;
+  }
+
+  _removeFromElement() {
+    this.clearAutocomplete();
+    this._element.removeEventListener('keydown', this._boundOnKeyDown, false);
+    this._element.removeEventListener('input', this._boundOnInput, false);
+    this._element.removeEventListener('selectstart', this._boundClearAutocomplete, false);
+    this._element.removeEventListener('blur', this._boundClearAutocomplete, false);
+    this._element.ownerDocument.defaultView.removeEventListener('resize', this._boundClearAutocomplete, false);
+    if (this._isEditing)
+      this._stopEditing();
+    if (this._suggestBox)
+      this._suggestBox.removeFromElement();
+  }
+
+  /**
+   * @param {function(!Event)=} blurListener
+   */
+  _startEditing(blurListener) {
+    this._isEditing = true;
+    this._contentElement.classList.add('text-prompt-editing');
+    if (blurListener) {
+      this._blurListener = blurListener;
+      this._element.addEventListener('blur', this._blurListener, false);
+    }
+    this._oldTabIndex = this._element.tabIndex;
+    if (this._element.tabIndex < 0)
+      this._element.tabIndex = 0;
+    this._focusRestorer = new WebInspector.ElementFocusRestorer(this._element);
+    if (!this.text())
+      this.autoCompleteSoon();
+  }
+
+  _stopEditing() {
+    this._element.tabIndex = this._oldTabIndex;
+    if (this._blurListener)
+      this._element.removeEventListener('blur', this._blurListener, false);
+    this._contentElement.classList.remove('text-prompt-editing');
+    delete this._isEditing;
+  }
+
+  /**
+   * @param {!Event} event
+   */
+  onMouseWheel(event) {
+    // Subclasses can implement.
+  }
+
+  /**
+   * @param {!Event} event
+   */
+  onKeyDown(event) {
+    var handled = false;
+
+    switch (event.key) {
+      case 'Tab':
+        handled = this.tabKeyPressed(event);
+        break;
+      case 'ArrowLeft':
+      case 'Home':
+        this.clearAutocomplete();
+        break;
+      case 'ArrowRight':
+      case 'End':
+        if (this._isCaretAtEndOfPrompt())
+          handled = this.acceptAutoComplete();
+        else
+          this.clearAutocomplete();
+        break;
+      case 'Escape':
+        if (this._isSuggestBoxVisible()) {
+          this.clearAutocomplete();
+          handled = true;
+        }
+        break;
+      case ' ':  // Space
+        if (event.ctrlKey && !event.metaKey && !event.altKey && !event.shiftKey) {
+          this.autoCompleteSoon(true);
+          handled = true;
+        }
+        break;
+      case 'Alt':
+      case 'Meta':
+      case 'Shift':
+      case 'Control':
+        break;
+    }
+
+    if (!handled && this._isSuggestBoxVisible())
+      handled = this._suggestBox.keyPressed(event);
+
+    if (handled)
+      event.consume(true);
+  }
+
+  /**
+   * @param {!Event} event
+   */
+  onInput(event) {
+    var text = this.text();
+    var hasCommonPrefix = text.startsWith(this._previousText) || this._previousText.startsWith(text);
+    if (this._prefixRange && hasCommonPrefix)
+      this._prefixRange.endColumn += text.length - this._previousText.length;
+    this._refreshGhostText();
+    this._previousText = text;
+
+    this.autoCompleteSoon();
+  }
+
+  /**
+   * @return {boolean}
+   */
+  acceptAutoComplete() {
+    var result = false;
+    if (this._isSuggestBoxVisible())
+      result = this._suggestBox.acceptSuggestion();
+    if (!result)
+      result = this._acceptSuggestionInternal();
+
+    return result;
+  }
+
+  clearAutocomplete() {
+    if (this._isSuggestBoxVisible())
+      this._suggestBox.hide();
+    this._clearAutocompleteTimeout();
+    this._prefixRange = null;
+    this._refreshGhostText();
+  }
+
+  _refreshGhostText() {
+    if (this._prefixRange && this._isCaretAtEndOfPrompt()) {
+      this._ghostTextElement.textContent =
+          this._currentSuggestion.substring(this._prefixRange.endColumn - this._prefixRange.startColumn);
+      this._element.appendChild(this._ghostTextElement);
+    } else {
+      this._ghostTextElement.remove();
+    }
+  }
+
+  _clearAutocompleteTimeout() {
+    if (this._completeTimeout) {
+      clearTimeout(this._completeTimeout);
+      delete this._completeTimeout;
+    }
+    this._completionRequestId++;
+  }
+
+  /**
+   * @param {boolean=} force
+   */
+  autoCompleteSoon(force) {
+    var immediately = this._isSuggestBoxVisible() || force;
+    if (!this._completeTimeout)
+      this._completeTimeout =
+          setTimeout(this.complete.bind(this, force), immediately ? 0 : this._autocompletionTimeout);
+  }
+
+  /**
+   * @param {boolean=} force
+   * @param {boolean=} reverse
+   */
+  complete(force, reverse) {
+    this._clearAutocompleteTimeout();
+    var selection = this._element.getComponentSelection();
+    var selectionRange = selection && selection.rangeCount ? selection.getRangeAt(0) : null;
+    if (!selectionRange)
+      return;
+
+    var shouldExit;
+
+    if (!force && !this._isCaretAtEndOfPrompt() && !this._isSuggestBoxVisible())
+      shouldExit = true;
+    else if (!selection.isCollapsed)
+      shouldExit = true;
+    else if (!force) {
+      // BUG72018: Do not show suggest box if caret is followed by a non-stop character.
+      var wordSuffixRange = selectionRange.startContainer.rangeOfWord(
+          selectionRange.endOffset, this._completionStopCharacters, this._element, 'forward');
+      var autocompleteTextLength = this._ghostTextElement.parentNode ? this._ghostTextElement.textContent.length : 0;
+      if (wordSuffixRange.toString().length !== autocompleteTextLength)
+        shouldExit = true;
+    }
+    if (shouldExit) {
+      this.clearAutocomplete();
+      return;
+    }
+
+    var wordPrefixRange = selectionRange.startContainer.rangeOfWord(
+        selectionRange.startOffset, this._completionStopCharacters, this._element, 'backward');
+    this._loadCompletions(
+        /** @type {!Element} */ (this._proxyElement), wordPrefixRange, force || false,
+        this._completionsReady.bind(this, ++this._completionRequestId, selection, wordPrefixRange, !!reverse, !!force));
+  }
+
+  disableDefaultSuggestionForEmptyInput() {
+    this._disableDefaultSuggestionForEmptyInput = true;
+  }
+
+  /**
+   * @param {!Selection} selection
+   * @param {!Range} textRange
+   */
+  _boxForAnchorAtStart(selection, textRange) {
+    var rangeCopy = selection.getRangeAt(0).cloneRange();
+    var anchorElement = createElement('span');
+    anchorElement.textContent = '\u200B';
+    textRange.insertNode(anchorElement);
+    var box = anchorElement.boxInWindow(window);
+    anchorElement.remove();
+    selection.removeAllRanges();
+    selection.addRange(rangeCopy);
+    return box;
+  }
+
+  /**
+   * @return {?Range}
+   * @suppressGlobalPropertiesCheck
+   */
+  _createRange() {
+    return document.createRange();
+  }
+
+  /**
+   * @param {string} prefix
+   * @return {!WebInspector.SuggestBox.Suggestions}
+   */
+  additionalCompletions(prefix) {
+    return [];
+  }
+
+  /**
+   * @param {number} completionRequestId
+   * @param {!Selection} selection
+   * @param {!Range} originalWordPrefixRange
+   * @param {boolean} reverse
+   * @param {boolean} force
+   * @param {!Array.<string>} completions
+   * @param {number=} selectedIndex
+   */
+  _completionsReady(
+      completionRequestId,
+      selection,
+      originalWordPrefixRange,
+      reverse,
+      force,
+      completions,
+      selectedIndex) {
+    if (this._completionRequestId !== completionRequestId)
+      return;
+
+    var prefix = originalWordPrefixRange.toString();
+
+    // Filter out dupes.
+    var store = new Set();
+    completions = completions.filter(item => !store.has(item) && !!store.add(item));
+    var annotatedCompletions = completions.map(item => ({title: item}));
+
+    if (prefix || force) {
+      if (prefix)
+        annotatedCompletions = annotatedCompletions.concat(this.additionalCompletions(prefix));
+      else
+        annotatedCompletions = this.additionalCompletions(prefix).concat(annotatedCompletions);
+    }
+
+    if (!annotatedCompletions.length) {
+      this.clearAutocomplete();
+      return;
+    }
+
+    var selectionRange = selection.getRangeAt(0);
+
+    var fullWordRange = this._createRange();
+    fullWordRange.setStart(originalWordPrefixRange.startContainer, originalWordPrefixRange.startOffset);
+    fullWordRange.setEnd(selectionRange.endContainer, selectionRange.endOffset);
+
+    if (prefix + selectionRange.toString() !== fullWordRange.toString())
+      return;
+
+    selectedIndex = (this._disableDefaultSuggestionForEmptyInput && !this.text()) ? -1 : (selectedIndex || 0);
+
+    if (this._suggestBox)
+      this._suggestBox.updateSuggestions(
+          this._boxForAnchorAtStart(selection, fullWordRange), annotatedCompletions, selectedIndex,
+          !this._isCaretAtEndOfPrompt(), this.text());
+
+    var beforeRange = this._createRange();
+    beforeRange.setStart(this._element, 0);
+    beforeRange.setEnd(fullWordRange.startContainer, fullWordRange.startOffset);
+    this._prefixRange = new WebInspector.TextRange(
+        0, beforeRange.toString().length, 0, beforeRange.toString().length + fullWordRange.toString().length);
+
+    if (selectedIndex === -1)
+      return;
+    this.applySuggestion(annotatedCompletions[selectedIndex].title, true);
+  }
+
+  /**
+   * @override
+   * @param {string} suggestion
+   * @param {boolean=} isIntermediateSuggestion
+   */
+  applySuggestion(suggestion, isIntermediateSuggestion) {
+    if (!this._prefixRange)
+      return;
+    this._currentSuggestion = suggestion;
+    this._refreshGhostText();
+    if (isIntermediateSuggestion)
+      this.dispatchEventToListeners(WebInspector.TextPrompt.Events.ItemApplied);
+  }
+
+  /**
+   * @override
+   */
+  acceptSuggestion() {
+    this._acceptSuggestionInternal();
+  }
+
+  /**
+   * @return {boolean}
+   */
+  _acceptSuggestionInternal() {
+    if (!this._prefixRange)
+      return false;
+
+    var text = this.text();
+    this._element.textContent = text.substring(0, this._prefixRange.startColumn) + this._currentSuggestion +
+        text.substring(this._prefixRange.endColumn);
+    this._setDOMSelection(
+        this._prefixRange.startColumn + this._currentSuggestion.length,
+        this._prefixRange.startColumn + this._currentSuggestion.length);
+
+    this.clearAutocomplete();
+    this.dispatchEventToListeners(WebInspector.TextPrompt.Events.ItemAccepted);
+
+    return true;
+  }
+
+  /**
+   * @param {number} startColumn
+   * @param {number} endColumn
+   */
+  _setDOMSelection(startColumn, endColumn) {
+    this._element.normalize();
+    var node = this._element.childNodes[0];
+    if (!node || node === this._ghostTextElement)
+      return;
+    var range = this._createRange();
+    range.setStart(node, startColumn);
+    range.setEnd(node, endColumn);
+    var selection = this._element.getComponentSelection();
+    selection.removeAllRanges();
+    selection.addRange(range);
+  }
+
+  /**
+   * @return {boolean}
+   */
+  _isSuggestBoxVisible() {
+    return this._suggestBox && this._suggestBox.visible();
+  }
+
+  /**
+   * @return {boolean}
+   */
+  isCaretInsidePrompt() {
+    var selection = this._element.getComponentSelection();
+    // @see crbug.com/602541
+    var selectionRange = selection && selection.rangeCount ? selection.getRangeAt(0) : null;
+    if (!selectionRange || !selection.isCollapsed)
+      return false;
+    return selectionRange.startContainer.isSelfOrDescendant(this._element);
+  }
+
+  /**
+   * @return {boolean}
+   */
+  _isCaretAtEndOfPrompt() {
+    var selection = this._element.getComponentSelection();
+    var selectionRange = selection && selection.rangeCount ? selection.getRangeAt(0) : null;
+    if (!selectionRange || !selection.isCollapsed)
+      return false;
+
+    var node = selectionRange.startContainer;
+    if (!node.isSelfOrDescendant(this._element))
+      return false;
+
+    if (node.nodeType === Node.TEXT_NODE && selectionRange.startOffset < node.nodeValue.length)
+      return false;
+
+    var foundNextText = false;
+    while (node) {
+      if (node.nodeType === Node.TEXT_NODE && node.nodeValue.length) {
+        if (foundNextText && !this._ghostTextElement.isAncestor(node))
+          return false;
+        foundNextText = true;
+      }
+
+      node = node.traverseNextNode(this._element);
+    }
+
+    return true;
+  }
+
+  moveCaretToEndOfPrompt() {
+    var selection = this._element.getComponentSelection();
+    var selectionRange = this._createRange();
+
+    var container = this._element;
+    while (container.childNodes.length)
+      container = container.lastChild;
+    var offset = container.nodeType === Node.TEXT_NODE ? container.textContent.length : 0;
+    selectionRange.setStart(container, offset);
+    selectionRange.setEnd(container, offset);
+
+    selection.removeAllRanges();
+    selection.addRange(selectionRange);
+  }
+
+  /**
+   * @param {!Event} event
+   * @return {boolean}
+   */
+  tabKeyPressed(event) {
+    this.acceptAutoComplete();
+
+    // Consume the key.
+    return true;
+  }
+
+  /**
+   * @return {?Element}
+   */
+  proxyElementForTests() {
+    return this._proxyElement || null;
+  }
 };
 
 WebInspector.TextPrompt.DefaultAutocompletionTimeout = 250;
 
 /** @enum {symbol} */
 WebInspector.TextPrompt.Events = {
-    ItemApplied: Symbol("text-prompt-item-applied"),
-    ItemAccepted: Symbol("text-prompt-item-accepted")
-};
-
-WebInspector.TextPrompt.prototype = {
-    /**
-     * @param {function(!Element, !Range, boolean, function(!Array.<string>, number=))} completions
-     * @param {string=} stopCharacters
-     */
-    initialize: function(completions, stopCharacters)
-    {
-        this._loadCompletions = completions;
-        this._completionStopCharacters = stopCharacters || " =:[({;,!+-*/&|^<>.";
-    },
-
-    /**
-     * @param {number} timeout
-     */
-    setAutocompletionTimeout: function(timeout)
-    {
-        this._autocompletionTimeout = timeout;
-    },
-
-    /**
-     * @param {boolean} suggestBoxEnabled
-     */
-    setSuggestBoxEnabled: function(suggestBoxEnabled)
-    {
-        this._suggestBoxEnabled = suggestBoxEnabled;
-    },
-
-    renderAsBlock: function()
-    {
-        this._proxyElementDisplay = "block";
-    },
-
-    /**
-     * Clients should never attach any event listeners to the |element|. Instead,
-     * they should use the result of this method to attach listeners for bubbling events.
-     *
-     * @param {!Element} element
-     * @return {!Element}
-     */
-    attach: function(element)
-    {
-        return this._attachInternal(element);
-    },
-
-    /**
-     * Clients should never attach any event listeners to the |element|. Instead,
-     * they should use the result of this method to attach listeners for bubbling events
-     * or the |blurListener| parameter to register a "blur" event listener on the |element|
-     * (since the "blur" event does not bubble.)
-     *
-     * @param {!Element} element
-     * @param {function(!Event)} blurListener
-     * @return {!Element}
-     */
-    attachAndStartEditing: function(element, blurListener)
-    {
-        var proxyElement = this._attachInternal(element);
-        this._startEditing(blurListener);
-        return proxyElement;
-    },
-
-    /**
-     * @param {!Element} element
-     * @return {!Element}
-     */
-    _attachInternal: function(element)
-    {
-        if (this._proxyElement)
-            throw "Cannot attach an attached TextPrompt";
-        this._element = element;
-
-        this._boundOnKeyDown = this.onKeyDown.bind(this);
-        this._boundOnInput = this.onInput.bind(this);
-        this._boundOnMouseWheel = this.onMouseWheel.bind(this);
-        this._boundClearAutocomplete = this.clearAutocomplete.bind(this);
-        this._proxyElement = element.ownerDocument.createElement("span");
-        var shadowRoot = WebInspector.createShadowRootWithCoreStyles(this._proxyElement, "ui/textPrompt.css");
-        this._contentElement = shadowRoot.createChild("div");
-        this._contentElement.createChild("content");
-        this._proxyElement.style.display = this._proxyElementDisplay;
-        element.parentElement.insertBefore(this._proxyElement, element);
-        this._proxyElement.appendChild(element);
-        this._element.classList.add("text-prompt");
-        this._element.addEventListener("keydown", this._boundOnKeyDown, false);
-        this._element.addEventListener("input", this._boundOnInput, false);
-        this._element.addEventListener("mousewheel", this._boundOnMouseWheel, false);
-        this._element.addEventListener("selectstart", this._boundClearAutocomplete, false);
-        this._element.addEventListener("blur", this._boundClearAutocomplete, false);
-        this._element.ownerDocument.defaultView.addEventListener("resize", this._boundClearAutocomplete, false);
-
-        if (this._suggestBoxEnabled)
-            this._suggestBox = new WebInspector.SuggestBox(this, 20, true);
-
-        if (this._title)
-            this._proxyElement.title = this._title;
-
-        return this._proxyElement;
-    },
-
-    detach: function()
-    {
-        this._removeFromElement();
-        this._proxyElement.parentElement.insertBefore(this._element, this._proxyElement);
-        this._proxyElement.remove();
-        delete this._proxyElement;
-        this._element.classList.remove("text-prompt");
-        this._focusRestorer.restore();
-    },
-
-    /**
-     * @return {string}
-     */
-    textWithCurrentSuggestion: function()
-    {
-        return this._element.textContent;
-    },
-
-    /**
-     * @return {string}
-     */
-    text: function()
-    {
-        var text = this.textWithCurrentSuggestion();
-        if (this._ghostTextElement.parentNode) {
-            var addition = this._ghostTextElement.textContent;
-            text = text.substring(0, text.length - addition.length);
-        }
-        return text;
-    },
-
-    /**
-     * @param {string} x
-     */
-    setText: function(x)
-    {
-        this.clearAutocomplete();
-        if (!x) {
-            // Append a break element instead of setting textContent to make sure the selection is inside the prompt.
-            this._element.removeChildren();
-            this._element.createChild("br");
-        } else {
-            this._element.textContent = x;
-        }
-        this._previousText = this.text();
-
-        this.moveCaretToEndOfPrompt();
-        this._element.scrollIntoView();
-    },
-
-    /**
-     * @return {string}
-     */
-    title: function()
-    {
-        return this._title;
-    },
-
-    /**
-     * @param {string} title
-     */
-    setTitle: function(title)
-    {
-        this._title = title;
-        if (this._proxyElement)
-            this._proxyElement.title = title;
-    },
-
-    _removeFromElement: function()
-    {
-        this.clearAutocomplete();
-        this._element.removeEventListener("keydown", this._boundOnKeyDown, false);
-        this._element.removeEventListener("input", this._boundOnInput, false);
-        this._element.removeEventListener("selectstart", this._boundClearAutocomplete, false);
-        this._element.removeEventListener("blur", this._boundClearAutocomplete, false);
-        this._element.ownerDocument.defaultView.removeEventListener("resize", this._boundClearAutocomplete, false);
-        if (this._isEditing)
-            this._stopEditing();
-        if (this._suggestBox)
-            this._suggestBox.removeFromElement();
-    },
-
-    /**
-     * @param {function(!Event)=} blurListener
-     */
-    _startEditing: function(blurListener)
-    {
-        this._isEditing = true;
-        this._contentElement.classList.add("text-prompt-editing");
-        if (blurListener) {
-            this._blurListener = blurListener;
-            this._element.addEventListener("blur", this._blurListener, false);
-        }
-        this._oldTabIndex = this._element.tabIndex;
-        if (this._element.tabIndex < 0)
-            this._element.tabIndex = 0;
-        this._focusRestorer = new WebInspector.ElementFocusRestorer(this._element);
-        if (!this.text())
-            this.autoCompleteSoon();
-    },
-
-    _stopEditing: function()
-    {
-        this._element.tabIndex = this._oldTabIndex;
-        if (this._blurListener)
-            this._element.removeEventListener("blur", this._blurListener, false);
-        this._contentElement.classList.remove("text-prompt-editing");
-        delete this._isEditing;
-    },
-
-    /**
-     * @param {!Event} event
-     */
-    onMouseWheel: function(event)
-    {
-        // Subclasses can implement.
-    },
-
-    /**
-     * @param {!Event} event
-     */
-    onKeyDown: function(event)
-    {
-        var handled = false;
-
-        switch (event.key) {
-        case "Tab":
-            handled = this.tabKeyPressed(event);
-            break;
-        case "ArrowLeft":
-        case "Home":
-            this.clearAutocomplete();
-            break;
-        case "ArrowRight":
-        case "End":
-            if (this._isCaretAtEndOfPrompt())
-                handled = this.acceptAutoComplete();
-            else
-                this.clearAutocomplete();
-            break;
-        case "Escape":
-            if (this._isSuggestBoxVisible()) {
-                this.clearAutocomplete();
-                handled = true;
-            }
-            break;
-        case " ": // Space
-            if (event.ctrlKey && !event.metaKey && !event.altKey && !event.shiftKey) {
-                this.autoCompleteSoon(true);
-                handled = true;
-            }
-            break;
-        case "Alt":
-        case "Meta":
-        case "Shift":
-        case "Control":
-            break;
-        }
-
-        if (!handled && this._isSuggestBoxVisible())
-            handled = this._suggestBox.keyPressed(event);
-
-        if (handled)
-            event.consume(true);
-    },
-
-    /**
-     * @param {!Event} event
-     */
-    onInput: function(event)
-    {
-        var text = this.text();
-        var hasCommonPrefix = text.startsWith(this._previousText) || this._previousText.startsWith(text);
-        if (this._prefixRange && hasCommonPrefix)
-            this._prefixRange.endColumn += text.length - this._previousText.length;
-        this._refreshGhostText();
-        this._previousText = text;
-
-        this.autoCompleteSoon();
-    },
-
-    /**
-     * @return {boolean}
-     */
-    acceptAutoComplete: function()
-    {
-        var result = false;
-        if (this._isSuggestBoxVisible())
-            result = this._suggestBox.acceptSuggestion();
-        if (!result)
-            result = this._acceptSuggestionInternal();
-
-        return result;
-    },
-
-    clearAutocomplete: function()
-    {
-        if (this._isSuggestBoxVisible())
-            this._suggestBox.hide();
-        this._clearAutocompleteTimeout();
-        this._prefixRange = null;
-        this._refreshGhostText();
-    },
-
-    _refreshGhostText: function()
-    {
-        if (this._prefixRange && this._isCaretAtEndOfPrompt()) {
-            this._ghostTextElement.textContent = this._currentSuggestion.substring(this._prefixRange.endColumn - this._prefixRange.startColumn);
-            this._element.appendChild(this._ghostTextElement);
-        } else {
-            this._ghostTextElement.remove();
-        }
-    },
-
-    _clearAutocompleteTimeout: function()
-    {
-        if (this._completeTimeout) {
-            clearTimeout(this._completeTimeout);
-            delete this._completeTimeout;
-        }
-        this._completionRequestId++;
-    },
-
-    /**
-     * @param {boolean=} force
-     */
-    autoCompleteSoon: function(force)
-    {
-        var immediately = this._isSuggestBoxVisible() || force;
-        if (!this._completeTimeout)
-            this._completeTimeout = setTimeout(this.complete.bind(this, force), immediately ? 0 : this._autocompletionTimeout);
-    },
-
-    /**
-     * @param {boolean=} force
-     * @param {boolean=} reverse
-     */
-    complete: function(force, reverse)
-    {
-        this._clearAutocompleteTimeout();
-        var selection = this._element.getComponentSelection();
-        var selectionRange = selection && selection.rangeCount ? selection.getRangeAt(0) : null;
-        if (!selectionRange)
-            return;
-
-        var shouldExit;
-
-        if (!force && !this._isCaretAtEndOfPrompt() && !this._isSuggestBoxVisible())
-            shouldExit = true;
-        else if (!selection.isCollapsed)
-            shouldExit = true;
-        else if (!force) {
-            // BUG72018: Do not show suggest box if caret is followed by a non-stop character.
-            var wordSuffixRange = selectionRange.startContainer.rangeOfWord(selectionRange.endOffset, this._completionStopCharacters, this._element, "forward");
-            var autocompleteTextLength = this._ghostTextElement.parentNode ? this._ghostTextElement.textContent.length : 0;
-            if (wordSuffixRange.toString().length !== autocompleteTextLength)
-                shouldExit = true;
-        }
-        if (shouldExit) {
-            this.clearAutocomplete();
-            return;
-        }
-
-        var wordPrefixRange = selectionRange.startContainer.rangeOfWord(selectionRange.startOffset, this._completionStopCharacters, this._element, "backward");
-        this._loadCompletions(/** @type {!Element} */ (this._proxyElement), wordPrefixRange, force || false, this._completionsReady.bind(this, ++this._completionRequestId, selection, wordPrefixRange, !!reverse, !!force));
-    },
-
-    disableDefaultSuggestionForEmptyInput: function()
-    {
-        this._disableDefaultSuggestionForEmptyInput = true;
-    },
-
-    /**
-     * @param {!Selection} selection
-     * @param {!Range} textRange
-     */
-    _boxForAnchorAtStart: function(selection, textRange)
-    {
-        var rangeCopy = selection.getRangeAt(0).cloneRange();
-        var anchorElement = createElement("span");
-        anchorElement.textContent = "\u200B";
-        textRange.insertNode(anchorElement);
-        var box = anchorElement.boxInWindow(window);
-        anchorElement.remove();
-        selection.removeAllRanges();
-        selection.addRange(rangeCopy);
-        return box;
-    },
-
-    /**
-     * @return {?Range}
-     * @suppressGlobalPropertiesCheck
-     */
-    _createRange: function()
-    {
-        return document.createRange();
-    },
-
-    /**
-     * @param {string} prefix
-     * @return {!WebInspector.SuggestBox.Suggestions}
-     */
-    additionalCompletions: function(prefix)
-    {
-        return [];
-    },
-
-    /**
-     * @param {number} completionRequestId
-     * @param {!Selection} selection
-     * @param {!Range} originalWordPrefixRange
-     * @param {boolean} reverse
-     * @param {boolean} force
-     * @param {!Array.<string>} completions
-     * @param {number=} selectedIndex
-     */
-    _completionsReady: function(completionRequestId, selection, originalWordPrefixRange, reverse, force, completions, selectedIndex)
-    {
-        if (this._completionRequestId !== completionRequestId)
-            return;
-
-        var prefix = originalWordPrefixRange.toString();
-
-        // Filter out dupes.
-        var store = new Set();
-        completions = completions.filter(item => !store.has(item) && !!store.add(item));
-        var annotatedCompletions = completions.map(item => ({title: item}));
-
-        if (prefix || force) {
-            if (prefix)
-                annotatedCompletions = annotatedCompletions.concat(this.additionalCompletions(prefix));
-            else
-                annotatedCompletions = this.additionalCompletions(prefix).concat(annotatedCompletions);
-        }
-
-        if (!annotatedCompletions.length) {
-            this.clearAutocomplete();
-            return;
-        }
-
-        var selectionRange = selection.getRangeAt(0);
-
-        var fullWordRange = this._createRange();
-        fullWordRange.setStart(originalWordPrefixRange.startContainer, originalWordPrefixRange.startOffset);
-        fullWordRange.setEnd(selectionRange.endContainer, selectionRange.endOffset);
-
-        if (prefix + selectionRange.toString() !== fullWordRange.toString())
-            return;
-
-        selectedIndex = (this._disableDefaultSuggestionForEmptyInput && !this.text()) ? -1 : (selectedIndex || 0);
-
-        if (this._suggestBox)
-            this._suggestBox.updateSuggestions(this._boxForAnchorAtStart(selection, fullWordRange), annotatedCompletions, selectedIndex, !this._isCaretAtEndOfPrompt(), this.text());
-
-        var beforeRange = this._createRange();
-        beforeRange.setStart(this._element, 0);
-        beforeRange.setEnd(fullWordRange.startContainer, fullWordRange.startOffset);
-        this._prefixRange = new WebInspector.TextRange(0, beforeRange.toString().length, 0, beforeRange.toString().length + fullWordRange.toString().length);
-
-        if (selectedIndex === -1)
-            return;
-        this.applySuggestion(annotatedCompletions[selectedIndex].title, true);
-    },
-
-    /**
-     * @override
-     * @param {string} suggestion
-     * @param {boolean=} isIntermediateSuggestion
-     */
-    applySuggestion: function(suggestion, isIntermediateSuggestion)
-    {
-        if (!this._prefixRange)
-            return;
-        this._currentSuggestion = suggestion;
-        this._refreshGhostText();
-        if (isIntermediateSuggestion)
-            this.dispatchEventToListeners(WebInspector.TextPrompt.Events.ItemApplied);
-    },
-
-    /**
-     * @override
-     */
-    acceptSuggestion: function()
-    {
-        this._acceptSuggestionInternal();
-    },
-
-    /**
-     * @return {boolean}
-     */
-    _acceptSuggestionInternal: function()
-    {
-        if (!this._prefixRange)
-            return false;
-
-        var text = this.text();
-        this._element.textContent = text.substring(0, this._prefixRange.startColumn) + this._currentSuggestion + text.substring(this._prefixRange.endColumn);
-        this._setDOMSelection(this._prefixRange.startColumn + this._currentSuggestion.length, this._prefixRange.startColumn + this._currentSuggestion.length);
-
-        this.clearAutocomplete();
-        this.dispatchEventToListeners(WebInspector.TextPrompt.Events.ItemAccepted);
-
-        return true;
-    },
-
-    /**
-     * @param {number} startColumn
-     * @param {number} endColumn
-     */
-    _setDOMSelection: function(startColumn, endColumn)
-    {
-        this._element.normalize();
-        var node = this._element.childNodes[0];
-        if (!node || node === this._ghostTextElement)
-            return;
-        var range = this._createRange();
-        range.setStart(node, startColumn);
-        range.setEnd(node, endColumn);
-        var selection = this._element.getComponentSelection();
-        selection.removeAllRanges();
-        selection.addRange(range);
-    },
-
-    /**
-     * @return {boolean}
-     */
-    _isSuggestBoxVisible: function()
-    {
-        return this._suggestBox && this._suggestBox.visible();
-    },
-
-    /**
-     * @return {boolean}
-     */
-    isCaretInsidePrompt: function()
-    {
-        var selection = this._element.getComponentSelection();
-        // @see crbug.com/602541
-        var selectionRange = selection && selection.rangeCount ? selection.getRangeAt(0) : null;
-        if (!selectionRange || !selection.isCollapsed)
-            return false;
-        return selectionRange.startContainer.isSelfOrDescendant(this._element);
-    },
-
-    /**
-     * @return {boolean}
-     */
-    _isCaretAtEndOfPrompt: function()
-    {
-        var selection = this._element.getComponentSelection();
-        var selectionRange = selection && selection.rangeCount ? selection.getRangeAt(0) : null;
-        if (!selectionRange || !selection.isCollapsed)
-            return false;
-
-        var node = selectionRange.startContainer;
-        if (!node.isSelfOrDescendant(this._element))
-            return false;
-
-        if (node.nodeType === Node.TEXT_NODE && selectionRange.startOffset < node.nodeValue.length)
-            return false;
-
-        var foundNextText = false;
-        while (node) {
-            if (node.nodeType === Node.TEXT_NODE && node.nodeValue.length) {
-                if (foundNextText && !this._ghostTextElement.isAncestor(node))
-                    return false;
-                foundNextText = true;
-            }
-
-            node = node.traverseNextNode(this._element);
-        }
-
-        return true;
-    },
-
-    moveCaretToEndOfPrompt: function()
-    {
-        var selection = this._element.getComponentSelection();
-        var selectionRange = this._createRange();
-
-        var container = this._element;
-        while (container.childNodes.length)
-            container = container.lastChild;
-        var offset = container.nodeType === Node.TEXT_NODE ? container.textContent.length : 0;
-        selectionRange.setStart(container, offset);
-        selectionRange.setEnd(container, offset);
-
-        selection.removeAllRanges();
-        selection.addRange(selectionRange);
-    },
-
-    /**
-     * @param {!Event} event
-     * @return {boolean}
-     */
-    tabKeyPressed: function(event)
-    {
-        this.acceptAutoComplete();
-
-        // Consume the key.
-        return true;
-    },
-
-    /**
-     * @return {?Element}
-     */
-    proxyElementForTests: function()
-    {
-        return this._proxyElement || null;
-    },
-
-    __proto__: WebInspector.Object.prototype
+  ItemApplied: Symbol('text-prompt-item-applied'),
+  ItemAccepted: Symbol('text-prompt-item-accepted')
 };