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 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

 /* 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/. */

 #include "nsFormControlFrame.h"

 #include "nsGkAtoms.h"

 #include "nsLayoutUtils.h"

 #include "nsIDOMHTMLInputElement.h"

 #include "mozilla/EventStateManager.h"

 #include "mozilla/LookAndFeel.h"

 #include "nsDeviceContext.h"

 using namespace mozilla;

 //#define FCF_NOISY

 nsFormControlFrame::nsFormControlFrame(nsStyleContext* aContext) :

   nsLeafFrame(aContext)

 {

 }

 nsFormControlFrame::~nsFormControlFrame()

 {

 }

 nsIAtom*

 nsFormControlFrame::GetType() const

 {

   return nsGkAtoms::formControlFrame; 

 }

 void

 nsFormControlFrame::DestroyFrom(nsIFrame* aDestructRoot)

 {

   // Unregister the access key registered in reflow

   nsFormControlFrame::RegUnRegAccessKey(static_cast<nsIFrame*>(this), false);

   nsLeafFrame::DestroyFrom(aDestructRoot);

 }

 NS_QUERYFRAME_HEAD(nsFormControlFrame)

   NS_QUERYFRAME_ENTRY(nsIFormControlFrame)

 NS_QUERYFRAME_TAIL_INHERITING(nsLeafFrame)

 NS_IMPL_FRAMEARENA_HELPERS(nsFormControlFrame)

 nscoord

 nsFormControlFrame::GetIntrinsicWidth()

 {

   // Provide a reasonable default for sites that use an "auto" height.

   // Note that if you change this, you should change the values in forms.css

   // as well.  This is the 13px default width minus the 2px default border.

   return nsPresContext::CSSPixelsToAppUnits(13 - 2 * 2);

 }

 nscoord

 nsFormControlFrame::GetIntrinsicHeight()

 {

   // Provide a reasonable default for sites that use an "auto" height.

   // Note that if you change this, you should change the values in forms.css

   // as well. This is the 13px default width minus the 2px default border.

   return nsPresContext::CSSPixelsToAppUnits(13 - 2 * 2);

 }

 nscoord

 nsFormControlFrame::GetBaseline() const

 {

   NS_ASSERTION(!NS_SUBTREE_DIRTY(this),

                "frame must not be dirty");

   // Treat radio buttons and checkboxes as having an intrinsic baseline

   // at the bottom of the control (use the bottom content edge rather

   // than the bottom margin edge).

   return mRect.height - GetUsedBorderAndPadding().bottom;

 }

 nsresult

 nsFormControlFrame::Reflow(nsPresContext*          aPresContext,

                            nsHTMLReflowMetrics&     aDesiredSize,

                            const nsHTMLReflowState& aReflowState,

                            nsReflowStatus&          aStatus)

 {

   DO_GLOBAL_REFLOW_COUNT("nsFormControlFrame");

   DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);

   if (mState & NS_FRAME_FIRST_REFLOW) {

     RegUnRegAccessKey(static_cast<nsIFrame*>(this), true);

   }

   nsresult rv = nsLeafFrame::Reflow(aPresContext, aDesiredSize, aReflowState,

                                     aStatus);

   if (NS_FAILED(rv)) {

     return rv;

   }

   if (nsLayoutUtils::FontSizeInflationEnabled(aPresContext)) {

     float inflation = nsLayoutUtils::FontSizeInflationFor(this);

     aDesiredSize.Width() *= inflation;

     aDesiredSize.Height() *= inflation;

     aDesiredSize.UnionOverflowAreasWithDesiredBounds();

     FinishAndStoreOverflow(&aDesiredSize);

   }

   return NS_OK;

 }

 nsresult

 nsFormControlFrame::RegUnRegAccessKey(nsIFrame * aFrame, bool aDoReg)

 {

   NS_ENSURE_ARG_POINTER(aFrame);

   nsPresContext* presContext = aFrame->PresContext();

   NS_ASSERTION(presContext, "aPresContext is NULL in RegUnRegAccessKey!");

   nsAutoString accessKey;

   nsIContent* content = aFrame->GetContent();

   content->GetAttr(kNameSpaceID_None, nsGkAtoms::accesskey, accessKey);

   if (!accessKey.IsEmpty()) {

     EventStateManager* stateManager = presContext->EventStateManager();

     if (aDoReg) {

       stateManager->RegisterAccessKey(content, (uint32_t)accessKey.First());

     } else {

       stateManager->UnregisterAccessKey(content, (uint32_t)accessKey.First());

     }

     return NS_OK;

   }

   return NS_ERROR_FAILURE;

 }

 void 

 nsFormControlFrame::SetFocus(bool aOn, bool aRepaint)

 {

 }

 nsresult

 nsFormControlFrame::HandleEvent(nsPresContext* aPresContext, 

                                 WidgetGUIEvent* aEvent,

                                 nsEventStatus* aEventStatus)

 {

   // Check for user-input:none style

   const nsStyleUserInterface* uiStyle = StyleUserInterface();

   if (uiStyle->mUserInput == NS_STYLE_USER_INPUT_NONE ||

       uiStyle->mUserInput == NS_STYLE_USER_INPUT_DISABLED)

     return nsFrame::HandleEvent(aPresContext, aEvent, aEventStatus);

   return NS_OK;

 }

 void

 nsFormControlFrame::GetCurrentCheckState(bool *aState)

 {

   nsCOMPtr<nsIDOMHTMLInputElement> inputElement = do_QueryInterface(mContent);

   if (inputElement) {

     inputElement->GetChecked(aState);

   }

 }

 nsresult

 nsFormControlFrame::SetFormProperty(nsIAtom* aName, const nsAString& aValue)

 {

   return NS_OK;

 }

 // static

 nsRect

 nsFormControlFrame::GetUsableScreenRect(nsPresContext* aPresContext)

 {

   nsRect screen;

   nsDeviceContext *context = aPresContext->DeviceContext();

   int32_t dropdownCanOverlapOSBar =

     LookAndFeel::GetInt(LookAndFeel::eIntID_MenusCanOverlapOSBar, 0);

   if ( dropdownCanOverlapOSBar )

     context->GetRect(screen);

   else

     context->GetClientRect(screen);

   return screen;

 }