gecko/layout/forms/nsFormControlFrame.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsFormControlFrame.h"
#include "nsGkAtoms.h"
#include "nsIDOMHTMLInputElement.h"
#include "nsEventStateManager.h"
#include "nsILookAndFeel.h"
//#define FCF_NOISY
const PRInt32 kSizeNotSet = -1;
nsFormControlFrame::nsFormControlFrame(nsStyleContext* aContext) :
nsLeafFrame(aContext)
{
}
nsFormControlFrame::~nsFormControlFrame()
{
}
void
nsFormControlFrame::DestroyFrom(nsIFrame* aDestructRoot)
{
// Unregister the access key registered in reflow
nsFormControlFrame::RegUnRegAccessKey(static_cast<nsIFrame*>(this), PR_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;
}
NS_METHOD
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), PR_TRUE);
}
return nsLeafFrame::Reflow(aPresContext, aDesiredSize, aReflowState,
aStatus);
}
nsresult
nsFormControlFrame::RegUnRegAccessKey(nsIFrame * aFrame, PRBool 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()) {
nsEventStateManager *stateManager = presContext->EventStateManager();
if (aDoReg) {
stateManager->RegisterAccessKey(content, (PRUint32)accessKey.First());
} else {
stateManager->UnregisterAccessKey(content, (PRUint32)accessKey.First());
}
return NS_OK;
}
return NS_ERROR_FAILURE;
}
void
nsFormControlFrame::SetFocus(PRBool aOn, PRBool aRepaint)
{
}
NS_METHOD
nsFormControlFrame::HandleEvent(nsPresContext* aPresContext,
nsGUIEvent* aEvent,
nsEventStatus* aEventStatus)
{
// Check for user-input:none style
const nsStyleUserInterface* uiStyle = GetStyleUserInterface();
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(PRBool *aState)
{
nsCOMPtr<nsIDOMHTMLInputElement> inputElement = do_QueryInterface(mContent);
if (inputElement) {
inputElement->GetChecked(aState);
}
}
nsresult
nsFormControlFrame::SetFormProperty(nsIAtom* aName, const nsAString& aValue)
{
return NS_OK;
}
nsresult
nsFormControlFrame::GetFormProperty(nsIAtom* aName, nsAString& aValue) const
{
aValue.Truncate();
return NS_OK;
}
// static
nsRect
nsFormControlFrame::GetUsableScreenRect(nsPresContext* aPresContext)
{
nsRect screen;
nsDeviceContext *context = aPresContext->DeviceContext();
PRBool dropdownCanOverlapOSBar = PR_FALSE;
nsILookAndFeel *lookAndFeel = aPresContext->LookAndFeel();
lookAndFeel->GetMetric(nsILookAndFeel::eMetric_MenusCanOverlapOSBar,
dropdownCanOverlapOSBar);
if ( dropdownCanOverlapOSBar )
context->GetRect(screen);
else
context->GetClientRect(screen);
return screen;
}