nsComboboxControlFrame.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 nsComboboxControlFrame_h_

#define nsComboboxControlFrame_h_

#include "ButtonControlFrame.h"

#include "mozilla/Attributes.h"

namespace mozilla {

class PresShell;

class ComboboxLabelFrame;

namespace dom {

class HTMLSelectElement;

}  // namespace mozilla

class nsComboboxControlFrame final : public mozilla::ButtonControlFrame {

  using Element = mozilla::dom::Element;

 public:

  friend class mozilla::ComboboxLabelFrame;

  nsComboboxControlFrame(ComputedStyle* aStyle, nsPresContext* aPresContext);

  ~nsComboboxControlFrame();

  NS_DECL_QUERYFRAME

  NS_DECL_FRAMEARENA_HELPERS(nsComboboxControlFrame)

#ifdef ACCESSIBILITY

  mozilla::a11y::AccType AccessibleType() final;

#endif

  nscoord IntrinsicISize(const mozilla::IntrinsicSizeInput& aInput,

                         mozilla::IntrinsicISizeType aType) final;

  void GetLabelText(nsAString&);

  void UpdateLabelText();

  void Reflow(nsPresContext* aCX, ReflowOutput& aDesiredSize,

              const ReflowInput& aReflowInput, nsReflowStatus& aStatus) final;

  MOZ_CAN_RUN_SCRIPT_BOUNDARY

  nsresult HandleEvent(nsPresContext* aPresContext,

                       mozilla::WidgetGUIEvent* aEvent,

                       nsEventStatus* aEventStatus) final;

  void Init(nsIContent* aContent, nsContainerFrame* aParent,

            nsIFrame* aPrevInFlow) final;

  void Destroy(DestroyContext&) final;

#ifdef DEBUG_FRAME_DUMP

  nsresult GetFrameName(nsAString& aResult) const final {

    return MakeFrameName(u"ComboboxControl"_ns, aResult);

#endif

  bool IsDroppedDown() const;

  // Return true if we should render a dropdown button.

  bool HasDropDownButton() const;

  int32_t CharCountOfLargestOptionForInflation() const;

 protected:

  nscoord DropDownButtonISize();

  nscoord GetLongestOptionISize(gfxContext*) const;

  mozilla::dom::HTMLSelectElement& Select() const;

  void GetOptionText(uint32_t aIndex, nsAString& aText) const;

  // The inline size of our display area. Used by that frame's reflow to size to

  // the full inline size except the drop-marker.

  nscoord mDisplayISize = 0;

};

#endif