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diff --git a/dom/html/nsITextControlElement.h b/dom/html/nsITextControlElement.h
new file mode 100644
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+++ b/dom/html/nsITextControlElement.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef nsITextControlElement_h___
+#define nsITextControlElement_h___
+
+#include "nsISupports.h"
+#include "nsCOMPtr.h"
+class nsIContent;
+class nsAString;
+class nsIEditor;
+class nsISelectionController;
+class nsFrameSelection;
+class nsTextControlFrame;
+
+namespace mozilla {
+namespace dom {
+class Element;
+} // namespace dom
+} // namespace mozilla
+
+// IID for the nsITextControl interface
+#define NS_ITEXTCONTROLELEMENT_IID    \
+{ 0x3df7db6d, 0xa548, 0x4e20, \
+ { 0x97, 0xfd, 0x75, 0xa3, 0x31, 0xa2, 0xf3, 0xd4 } }
+
+/**
+ * This interface is used for the text control frame to get the editor and
+ * selection controller objects, and some helper properties.
+ */
+class nsITextControlElement : public nsISupports {
+public:
+
+  NS_DECLARE_STATIC_IID_ACCESSOR(NS_ITEXTCONTROLELEMENT_IID)
+
+  /**
+   * Tell the control that value has been deliberately changed (or not).
+   */
+  NS_IMETHOD SetValueChanged(bool changed) = 0;
+
+  /**
+   * Find out whether this is a single line text control.  (text or password)
+   * @return whether this is a single line text control
+   */
+  NS_IMETHOD_(bool) IsSingleLineTextControl() const = 0;
+
+  /**
+   * Find out whether this control is a textarea.
+   * @return whether this is a textarea text control
+   */
+  NS_IMETHOD_(bool) IsTextArea() const = 0;
+
+  /**
+   * Find out whether this control edits plain text.  (Currently always true.)
+   * @return whether this is a plain text control
+   */
+  NS_IMETHOD_(bool) IsPlainTextControl() const = 0;
+
+  /**
+   * Find out whether this is a password control (input type=password)
+   * @return whether this is a password ontrol
+   */
+  NS_IMETHOD_(bool) IsPasswordTextControl() const = 0;
+
+  /**
+   * Get the cols attribute (if textarea) or a default
+   * @return the number of columns to use
+   */
+  NS_IMETHOD_(int32_t) GetCols() = 0;
+
+  /**
+   * Get the column index to wrap at, or -1 if we shouldn't wrap
+   */
+  NS_IMETHOD_(int32_t) GetWrapCols() = 0;
+
+  /**
+   * Get the rows attribute (if textarea) or a default
+   * @return the number of rows to use
+   */
+  NS_IMETHOD_(int32_t) GetRows() = 0;
+
+  /**
+   * Get the default value of the text control
+   */
+  NS_IMETHOD_(void) GetDefaultValueFromContent(nsAString& aValue) = 0;
+
+  /**
+   * Return true if the value of the control has been changed.
+   */
+  NS_IMETHOD_(bool) ValueChanged() const = 0;
+
+  /**
+   * Get the current value of the text editor.
+   *
+   * @param aValue the buffer to retrieve the value in
+   * @param aIgnoreWrap whether to ignore the text wrapping behavior specified
+   * for the element.
+   */
+  NS_IMETHOD_(void) GetTextEditorValue(nsAString& aValue, bool aIgnoreWrap) const = 0;
+
+  /**
+   * Get the editor object associated with the text editor.
+   * The return value is null if the control does not support an editor
+   * (for example, if it is a checkbox.)
+   */
+  NS_IMETHOD_(nsIEditor*) GetTextEditor() = 0;
+
+  /**
+   * Get the selection controller object associated with the text editor.
+   * The return value is null if the control does not support an editor
+   * (for example, if it is a checkbox.)
+   */
+  NS_IMETHOD_(nsISelectionController*) GetSelectionController() = 0;
+
+  NS_IMETHOD_(nsFrameSelection*) GetConstFrameSelection() = 0;
+
+  /**
+   * Binds a frame to the text control.  This is performed when a frame
+   * is created for the content node.
+   */
+  NS_IMETHOD BindToFrame(nsTextControlFrame* aFrame) = 0;
+
+  /**
+   * Unbinds a frame from the text control.  This is performed when a frame
+   * belonging to a content node is destroyed.
+   */
+  NS_IMETHOD_(void) UnbindFromFrame(nsTextControlFrame* aFrame) = 0;
+
+  /**
+   * Creates an editor for the text control.  This should happen when
+   * a frame has been created for the text control element, but the created
+   * editor may outlive the frame itself.
+   */
+  NS_IMETHOD CreateEditor() = 0;
+
+  /**
+   * Get the anonymous root node for the text control.
+   */
+  NS_IMETHOD_(nsIContent*) GetRootEditorNode() = 0;
+
+  /**
+   * Create the placeholder anonymous node for the text control and returns it.
+   */
+  NS_IMETHOD_(mozilla::dom::Element*) CreatePlaceholderNode() = 0;
+
+  /**
+   * Get the placeholder anonymous node for the text control.
+   */
+  NS_IMETHOD_(mozilla::dom::Element*) GetPlaceholderNode() = 0;
+
+  /**
+   * Initialize the keyboard event listeners.
+   */
+  NS_IMETHOD_(void) InitializeKeyboardEventListeners() = 0;
+
+  /**
+   * Update the placeholder visibility based on the element's state.
+   */
+  NS_IMETHOD_(void) UpdatePlaceholderVisibility(bool aNotify) = 0;
+
+  /**
+   * Returns the current expected placeholder visibility state.
+   */
+  NS_IMETHOD_(bool) GetPlaceholderVisibility() = 0;
+
+  /**
+   * Callback called whenever the value is changed.
+   */
+  NS_IMETHOD_(void) OnValueChanged(bool aNotify, bool aWasInteractiveUserChange) = 0;
+
+  static const int32_t DEFAULT_COLS = 20;
+  static const int32_t DEFAULT_ROWS = 1;
+  static const int32_t DEFAULT_ROWS_TEXTAREA = 2;
+  static const int32_t DEFAULT_UNDO_CAP = 1000;
+
+  // wrap can be one of these three values.  
+  typedef enum {
+    eHTMLTextWrap_Off     = 1,    // "off"
+    eHTMLTextWrap_Hard    = 2,    // "hard"
+    eHTMLTextWrap_Soft    = 3     // the default
+  } nsHTMLTextWrap;
+
+  static bool
+  GetWrapPropertyEnum(nsIContent* aContent, nsHTMLTextWrap& aWrapProp);
+
+  /**
+   * Does the editor have a selection cache?
+   *
+   * Note that this function has the side effect of making the editor for input
+   * elements be initialized eagerly.
+   */
+  NS_IMETHOD_(bool) HasCachedSelection() = 0;
+
+  static already_AddRefed<nsITextControlElement>
+  GetTextControlElementFromEditingHost(nsIContent* aHost);
+};
+
+NS_DEFINE_STATIC_IID_ACCESSOR(nsITextControlElement,
+                              NS_ITEXTCONTROLELEMENT_IID)
+
+#endif // nsITextControlElement_h___
+