layout/forms/nsCheckboxRadioFrame.h
author Cosmin Sabou <csabou@mozilla.com>
Thu, 02 Aug 2018 19:59:53 +0300
changeset 484986 f7f4ba3486b5e44b6ccdc3b150f5aa0aab76ffb7
parent 463054 0016368787a44bdf5deb4c9b73f3c0b59d2bc27a
child 505383 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Backed out changeset 5950c9d63c3b (bug 1090497) for build bustages on several files. CLOSED TREE

/* -*- 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 nsCheckboxRadioFrame_h___
#define nsCheckboxRadioFrame_h___

#include "mozilla/Attributes.h"
#include "nsIFormControlFrame.h"
#include "nsAtomicContainerFrame.h"
#include "nsDisplayList.h"

/**
 * nsCheckboxRadioFrame is used for radio buttons and checkboxes.
 * It also has two static methods (RegUnRegAccessKey and
 * GetScreenHeight) that are used by other form controls.
 */
class nsCheckboxRadioFrame final : public nsAtomicContainerFrame,
                                   public nsIFormControlFrame
{
public:
  NS_DECL_QUERYFRAME
  NS_DECL_FRAMEARENA_HELPERS(nsCheckboxRadioFrame)

  explicit nsCheckboxRadioFrame(ComputedStyle* aStyle);

  // nsIFrame replacements
  virtual bool IsFrameOfType(uint32_t aFlags) const override
  {
    return nsAtomicContainerFrame::IsFrameOfType(aFlags &
      ~(nsIFrame::eReplaced | nsIFrame::eReplacedContainsBlock));
  }

  virtual void BuildDisplayList(nsDisplayListBuilder*   aBuilder,
                                const nsDisplayListSet& aLists) override {
    DO_GLOBAL_REFLOW_COUNT_DSP("nsCheckboxRadioFrame");
    DisplayBorderBackgroundOutline(aBuilder, aLists);
  }

  /**
   * Both GetMinISize and GetPrefISize will return whatever GetIntrinsicISize
   * returns.
   */
  virtual nscoord GetMinISize(gfxContext *aRenderingContext) override;
  virtual nscoord GetPrefISize(gfxContext *aRenderingContext) override;

  /**
   * Our auto size is just intrinsic width and intrinsic height.
   */
  virtual mozilla::LogicalSize
  ComputeAutoSize(gfxContext*                 aRenderingContext,
                  mozilla::WritingMode        aWM,
                  const mozilla::LogicalSize& aCBSize,
                  nscoord                     aAvailableISize,
                  const mozilla::LogicalSize& aMargin,
                  const mozilla::LogicalSize& aBorder,
                  const mozilla::LogicalSize& aPadding,
                  ComputeSizeFlags            aFlags) override;

  /**
    * Respond to a gui event
    * @see nsIFrame::HandleEvent
    */
  virtual nsresult HandleEvent(nsPresContext* aPresContext,
                               mozilla::WidgetGUIEvent* aEvent,
                               nsEventStatus* aEventStatus) override;

  virtual nscoord GetLogicalBaseline(mozilla::WritingMode aWritingMode)
    const override;

  /**
    * Respond to the request to resize and/or reflow
    * @see nsIFrame::Reflow
    */
  virtual void Reflow(nsPresContext*      aCX,
                      ReflowOutput& aDesiredSize,
                      const ReflowInput& aReflowInput,
                      nsReflowStatus&      aStatus) override;

  virtual void DestroyFrom(nsIFrame* aDestructRoot, PostDestroyData& aPostDestroyData) override;

  // new behavior

  virtual void SetFocus(bool aOn = true, bool aRepaint = false) override;

  // nsIFormControlFrame
  virtual nsresult SetFormProperty(nsAtom* aName, const nsAString& aValue) override;

  // AccessKey Helper function
  static nsresult RegUnRegAccessKey(nsIFrame * aFrame, bool aDoReg);

  /**
   * Returns the usable screen rect in app units, eg the rect where we can
   * draw dropdowns.
   */
  static nsRect GetUsableScreenRect(nsPresContext* aPresContext);

protected:

  virtual ~nsCheckboxRadioFrame();

  static nscoord DefaultSize()
  {
    // XXXmats We have traditionally always returned 9px for GetMin/PrefISize
    // but we might want to factor in what the theme says, something like:
    // GetMinimumWidgetSize - GetWidgetPadding - GetWidgetBorder.
    return nsPresContext::CSSPixelsToAppUnits(9);
  }

  /**
   * Get the state of the checked attribute.
   * @param aState set to true if the checked attribute is set,
   * false if the checked attribute has been removed
   */
  void GetCurrentCheckState(bool* aState);
};

#endif