ButtonControlFrame.h

Enable keyboard shortcuts

/* 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 LAYOUT_FORMS_BUTTONCONTROLFRAME_H_

#define LAYOUT_FORMS_BUTTONCONTROLFRAME_H_

#include "nsBlockFrame.h"

class nsTextNode;

namespace mozilla {

// Abstract base class for:

//  * Combobox <select>.

//  * <input> with type={button,reset,submit}

//  * <input> with type=color

// Each of which are basically buttons but with different native-anonymous

// content / shadow tree. Note that this isn't used to implement <button> itself

// (that uses regular frames like nsBlockFrame or nsGridContainerFrame or so,

// depending on the display type).

class ButtonControlFrame : public nsBlockFrame {

 public:

  ButtonControlFrame(ComputedStyle* aStyle, nsPresContext* aPc,

                     ClassID aClassID)

      : nsBlockFrame(aStyle, aPc, aClassID) {

    MOZ_ASSERT(IsReplaced(), "Our subclasses should be replaced elements");

  NS_DECL_ABSTRACT_FRAME(ButtonControlFrame)

  nsContainerFrame* GetContentInsertionFrame() override { return this; }

  nsresult HandleEvent(nsPresContext* aPresContext,

                       mozilla::WidgetGUIEvent* aEvent,

                       nsEventStatus* aEventStatus) override;

  void Reflow(nsPresContext*, ReflowOutput&, const ReflowInput&,

              nsReflowStatus&) override;

  // Given a string of text (for the button label), ensure it's not empty so

  // that line height computations work (inserting a zero-width character if

  // necessary).

  static void EnsureNonEmptyLabel(nsAString&);

};

}  // namespace mozilla

#endif  // LAYOUT_FORMS_BUTTONCONTROLFRAME_H_