/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
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* The Original Code is mozilla.org code.
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* the Initial Developer. All Rights Reserved.
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*
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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#include "nsGfxCheckboxControlFrame.h"
#include "nsIContent.h"
#include "nsCOMPtr.h"
#include "nsCSSRendering.h"
#ifdef ACCESSIBILITY
#include "nsIAccessibilityService.h"
#endif
#include "nsIServiceManager.h"
#include "nsIDOMHTMLInputElement.h"
#include "nsDisplayList.h"
static void
PaintCheckMark(nsIRenderingContext& aRenderingContext,
const nsRect& aRect)
{
// Points come from the coordinates on a 7X7 unit box centered at 0,0
const PRInt32 checkPolygonX[] = { -3, -1, 3, 3, -1, -3 };
const PRInt32 checkPolygonY[] = { -1, 1, -3, -1, 3, 1 };
const PRInt32 checkNumPoints = sizeof(checkPolygonX) / sizeof(PRInt32);
const PRInt32 checkSize = 9; // This is value is determined by adding 2
// units to pad the 7x7 unit checkmark
// Scale the checkmark based on the smallest dimension
nscoord paintScale = PR_MIN(aRect.width, aRect.height) / checkSize;
nsPoint paintCenter(aRect.x + aRect.width / 2,
aRect.y + aRect.height / 2);
nsPoint paintPolygon[checkNumPoints];
// Convert checkmark for screen rendering
for (PRInt32 polyIndex = 0; polyIndex < checkNumPoints; polyIndex++) {
paintPolygon[polyIndex] = paintCenter +
nsPoint(checkPolygonX[polyIndex] * paintScale,
checkPolygonY[polyIndex] * paintScale);
}
aRenderingContext.FillPolygon(paintPolygon, checkNumPoints);
}
//------------------------------------------------------------
nsIFrame*
NS_NewGfxCheckboxControlFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
{
return new (aPresShell) nsGfxCheckboxControlFrame(aContext);
}
//------------------------------------------------------------
// Initialize GFX-rendered state
nsGfxCheckboxControlFrame::nsGfxCheckboxControlFrame(nsStyleContext* aContext)
: nsFormControlFrame(aContext)
{
}
nsGfxCheckboxControlFrame::~nsGfxCheckboxControlFrame()
{
}
//----------------------------------------------------------------------
// nsISupports
//----------------------------------------------------------------------
// Frames are not refcounted, no need to AddRef
NS_IMETHODIMP
nsGfxCheckboxControlFrame::QueryInterface(const nsIID& aIID, void** aInstancePtr)
{
NS_ASSERTION(aInstancePtr, "QueryInterface requires a non-NULL destination!");
if ( !aInstancePtr )
return NS_ERROR_NULL_POINTER;
if (aIID.Equals(NS_GET_IID(nsICheckboxControlFrame))) {
*aInstancePtr = (void*) ((nsICheckboxControlFrame*) this);
return NS_OK;
}
return nsFormControlFrame::QueryInterface(aIID, aInstancePtr);
}
#ifdef ACCESSIBILITY
NS_IMETHODIMP nsGfxCheckboxControlFrame::GetAccessible(nsIAccessible** aAccessible)
{
nsCOMPtr<nsIAccessibilityService> accService = do_GetService("@mozilla.org/accessibilityService;1");
if (accService) {
return accService->CreateHTMLCheckboxAccessible(NS_STATIC_CAST(nsIFrame*, this), aAccessible);
}
return NS_ERROR_FAILURE;
}
#endif
//--------------------------------------------------------------
NS_IMETHODIMP
nsGfxCheckboxControlFrame::SetCheckboxFaceStyleContext(nsStyleContext *aCheckboxFaceStyleContext)
{
mCheckButtonFaceStyle = aCheckboxFaceStyleContext;
return NS_OK;
}
//--------------------------------------------------------------
nsStyleContext*
nsGfxCheckboxControlFrame::GetAdditionalStyleContext(PRInt32 aIndex) const
{
switch (aIndex) {
case NS_GFX_CHECKBOX_CONTROL_FRAME_FACE_CONTEXT_INDEX:
return mCheckButtonFaceStyle;
break;
default:
return nsnull;
}
}
//--------------------------------------------------------------
void
nsGfxCheckboxControlFrame::SetAdditionalStyleContext(PRInt32 aIndex,
nsStyleContext* aStyleContext)
{
switch (aIndex) {
case NS_GFX_CHECKBOX_CONTROL_FRAME_FACE_CONTEXT_INDEX:
mCheckButtonFaceStyle = aStyleContext;
break;
}
}
//------------------------------------------------------------
NS_IMETHODIMP
nsGfxCheckboxControlFrame::OnChecked(nsPresContext* aPresContext,
PRBool aChecked)
{
Invalidate(GetOverflowRect(), PR_FALSE);
return NS_OK;
}
static void PaintCheckMarkFromStyle(nsIFrame* aFrame,
nsIRenderingContext* aCtx, const nsRect& aDirtyRect, nsPoint aPt) {
NS_STATIC_CAST(nsGfxCheckboxControlFrame*, aFrame)
->PaintCheckBoxFromStyle(*aCtx, aPt, aDirtyRect);
}
class nsDisplayCheckMark : public nsDisplayItem {
public:
nsDisplayCheckMark(nsGfxCheckboxControlFrame* aFrame)
: nsDisplayItem(aFrame) {
MOZ_COUNT_CTOR(nsDisplayCheckMark);
}
#ifdef NS_BUILD_REFCNT_LOGGING
virtual ~nsDisplayCheckMark() {
MOZ_COUNT_DTOR(nsDisplayCheckMark);
}
#endif
virtual void Paint(nsDisplayListBuilder* aBuilder, nsIRenderingContext* aCtx,
const nsRect& aDirtyRect);
NS_DISPLAY_DECL_NAME("CheckMark")
};
void
nsDisplayCheckMark::Paint(nsDisplayListBuilder* aBuilder,
nsIRenderingContext* aCtx, const nsRect& aDirtyRect) {
NS_STATIC_CAST(nsGfxCheckboxControlFrame*, mFrame)->
PaintCheckBox(*aCtx, aBuilder->ToReferenceFrame(mFrame), aDirtyRect);
}
//------------------------------------------------------------
void
nsGfxCheckboxControlFrame::PaintCheckBox(nsIRenderingContext& aRenderingContext,
nsPoint aPt,
const nsRect& aDirtyRect)
{
// REVIEW: moved the mAppearance test out so we avoid constructing
// a display item if it's not needed
nsMargin borderPadding(0,0,0,0);
CalcBorderPadding(borderPadding);
nsRect checkRect(aPt, mRect.Size());
checkRect.Deflate(borderPadding);
const nsStyleColor* color = GetStyleColor();
aRenderingContext.SetColor(color->mColor);
PaintCheckMark(aRenderingContext, checkRect);
}
//------------------------------------------------------------
NS_IMETHODIMP
nsGfxCheckboxControlFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists)
{
nsresult rv = nsFormControlFrame::BuildDisplayList(aBuilder, aDirtyRect, aLists);
NS_ENSURE_SUCCESS(rv, rv);
// Get current checked state through content model.
if (!GetCheckboxState() || !IsVisibleForPainting(aBuilder))
return NS_OK; // we're not checked or not visible, nothing to paint.
if (IsThemed())
return NS_OK; // No need to paint the checkmark. The theme will do it.
// Paint the checkmark
if (mCheckButtonFaceStyle) {
// This code actually works now; not sure how useful it'll be
// (The putpose is to allow the UA stylesheet can substitute its own
// checkmark for the default one)
const nsStyleBackground* myBackground = mCheckButtonFaceStyle->GetStyleBackground();
if (!myBackground->IsTransparent())
return aLists.Content()->AppendNewToTop(new (aBuilder)
nsDisplayGeneric(this, PaintCheckMarkFromStyle, "CheckMarkFromStyle"));
}
return aLists.Content()->AppendNewToTop(new (aBuilder) nsDisplayCheckMark(this));
}
void
nsGfxCheckboxControlFrame::PaintCheckBoxFromStyle(
nsIRenderingContext& aRenderingContext, nsPoint aPt, const nsRect& aDirtyRect) {
const nsStylePadding* myPadding = mCheckButtonFaceStyle->GetStylePadding();
const nsStylePosition* myPosition = mCheckButtonFaceStyle->GetStylePosition();
const nsStyleBorder* myBorder = mCheckButtonFaceStyle->GetStyleBorder();
const nsStyleBackground* myBackground = mCheckButtonFaceStyle->GetStyleBackground();
nscoord width = myPosition->mWidth.GetCoordValue();
nscoord height = myPosition->mHeight.GetCoordValue();
// Position the button centered within the control's rectangle.
nscoord x = (mRect.width - width) / 2;
nscoord y = (mRect.height - height) / 2;
nsRect rect(aPt.x + x, aPt.y + y, width, height);
nsCSSRendering::PaintBackgroundWithSC(GetPresContext(), aRenderingContext,
this, aDirtyRect, rect, *myBackground,
*myBorder, *myPadding, PR_FALSE);
nsCSSRendering::PaintBorder(GetPresContext(), aRenderingContext, this,
aDirtyRect, rect, *myBorder, mCheckButtonFaceStyle, 0);
}
//------------------------------------------------------------
PRBool
nsGfxCheckboxControlFrame::GetCheckboxState ( )
{
nsCOMPtr<nsIDOMHTMLInputElement> elem(do_QueryInterface(mContent));
PRBool retval = PR_FALSE;
elem->GetChecked(&retval);
return retval;
}
