gecko-dev/layout/forms/nsFormControlFrame.cpp

180 строки
5.1 KiB
C++

/* -*- 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 "nsEventStateManager.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;
}
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), 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()) {
nsEventStateManager *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)
{
}
NS_METHOD
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;
}