gecko-dev/layout/forms/nsFormControlFrame.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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*
* The Original Code is mozilla.org code.
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*
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#include "nsFormControlFrame.h"
#include "nsHTMLAtoms.h"
#include "nsIDOMHTMLInputElement.h"
#include "nsIEventStateManager.h"
#include "nsIScrollableView.h"
#include "nsILookAndFeel.h"
//#define FCF_NOISY
const PRInt32 kSizeNotSet = -1;
nsFormControlFrame::nsFormControlFrame(nsStyleContext* aContext) :
nsLeafFrame(aContext),
mDidInit(PR_FALSE)
{
}
nsFormControlFrame::~nsFormControlFrame()
{
}
void
nsFormControlFrame::Destroy()
{
// XXXldb Do we really need to do this? Shouldn't only those frames
// that use it do it?
nsFormControlFrame::RegUnRegAccessKey(NS_STATIC_CAST(nsIFrame*, this), PR_FALSE);
nsLeafFrame::Destroy();
}
// Frames are not refcounted, no need to AddRef
NS_IMETHODIMP
nsFormControlFrame::QueryInterface(const nsIID& aIID, void** aInstancePtr)
{
NS_PRECONDITION(0 != aInstancePtr, "null ptr");
if (NULL == aInstancePtr) {
return NS_ERROR_NULL_POINTER;
}
if (aIID.Equals(NS_GET_IID(nsIFormControlFrame))) {
*aInstancePtr = (void*) ((nsIFormControlFrame*) this);
return NS_OK;
}
return nsLeafFrame::QueryInterface(aIID, aInstancePtr);
}
void nsFormControlFrame::SetupCachedSizes(nsSize& aCacheSize,
nscoord& aCachedAscent,
nscoord& aCachedMaxElementWidth,
nsHTMLReflowMetrics& aDesiredSize)
{
aCacheSize.width = aDesiredSize.width;
aCacheSize.height = aDesiredSize.height;
aCachedAscent = aDesiredSize.ascent;
if (aDesiredSize.mComputeMEW) {
aCachedMaxElementWidth = aDesiredSize.mMaxElementWidth;
}
}
//------------------------------------------------------------
void nsFormControlFrame::SkipResizeReflow(nsSize& aCacheSize,
nscoord& aCachedAscent,
nscoord& aCachedMaxElementWidth,
nsSize& aCachedAvailableSize,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus,
PRBool& aBailOnWidth,
PRBool& aBailOnHeight)
{
if (aReflowState.reason == eReflowReason_Incremental ||
#ifdef IBMBIDI
aReflowState.reason == eReflowReason_StyleChange ||
#endif
aReflowState.reason == eReflowReason_Dirty) {
aBailOnHeight = PR_FALSE;
aBailOnWidth = PR_FALSE;
} else if (eReflowReason_Initial == aReflowState.reason) {
aBailOnHeight = PR_FALSE;
aBailOnWidth = PR_FALSE;
} else {
nscoord width;
if (NS_UNCONSTRAINEDSIZE == aReflowState.mComputedWidth) {
if (aReflowState.availableWidth == NS_UNCONSTRAINEDSIZE) {
width = NS_UNCONSTRAINEDSIZE;
aBailOnWidth = aCacheSize.width != kSizeNotSet;
#ifdef FCF_NOISY
if (aBailOnWidth) {
printf("-------------- #1 Bailing on aCachedAvailableSize.width %d != kSizeNotSet\n", aCachedAvailableSize.width);
}
#endif
} else {
width = aReflowState.availableWidth - aReflowState.mComputedBorderPadding.left -
aReflowState.mComputedBorderPadding.right;
aBailOnWidth = aCachedAvailableSize.width <= width && aCachedAvailableSize.width != kSizeNotSet;
#ifdef FCF_NOISY
if (aBailOnWidth) {
printf("-------------- #2 Bailing on aCachedAvailableSize.width %d <= width %d\n", aCachedAvailableSize.width, width );
} else {
aBailOnWidth = width <= (aCacheSize.width - aReflowState.mComputedBorderPadding.left - aReflowState.mComputedBorderPadding.right) &&
aCachedAvailableSize.width == kSizeNotSet;
if (aBailOnWidth) {
printf("-------------- #2.2 Bailing on width %d <= aCachedAvailableSize.width %d\n",(aCacheSize.width - aReflowState.mComputedBorderPadding.left - aReflowState.mComputedBorderPadding.right), width );
}
}
#endif
}
} else {
width = aReflowState.mComputedWidth;
//if (aCachedAvailableSize.width == kSizeNotSet) {
// //aBailOnWidth = aCachedAvailableSize.width == aCacheSize.width;
aBailOnWidth = PR_FALSE;
//} else {
aBailOnWidth = width == (aCacheSize.width - aReflowState.mComputedBorderPadding.left - aReflowState.mComputedBorderPadding.right);
//}
#ifdef FCF_NOISY
if (aBailOnWidth) {
printf("-------------- #3 Bailing on aCachedAvailableSize.width %d == aReflowState.mComputedWidth %d\n", aCachedAvailableSize.width, width );
}
#endif
}
nscoord height;
if (NS_UNCONSTRAINEDSIZE == aReflowState.mComputedHeight) {
if (aReflowState.availableHeight == NS_UNCONSTRAINEDSIZE) {
height = NS_UNCONSTRAINEDSIZE;
aBailOnHeight = aCacheSize.height != kSizeNotSet;
#ifdef FCF_NOISY
if (aBailOnHeight) {
printf("-------------- #1 Bailing on aCachedAvailableSize.height %d != kSizeNotSet\n", aCachedAvailableSize.height);
}
#endif
} else {
height = aReflowState.availableHeight - aReflowState.mComputedBorderPadding.left -
aReflowState.mComputedBorderPadding.right;
aBailOnHeight = aCachedAvailableSize.height <= height && aCachedAvailableSize.height != kSizeNotSet;
#ifdef FCF_NOISY
if (aBailOnHeight) {
printf("-------------- #2 Bailing on aCachedAvailableSize.height %d <= height %d\n", aCachedAvailableSize.height, height );
} else {
aBailOnHeight = height <= (aCacheSize.height - aReflowState.mComputedBorderPadding.left - aReflowState.mComputedBorderPadding.right) &&
aCachedAvailableSize.height == kSizeNotSet;
if (aBailOnHeight) {
printf("-------------- #2.2 Bailing on height %d <= aCachedAvailableSize.height %d\n",(aCacheSize.height - aReflowState.mComputedBorderPadding.left - aReflowState.mComputedBorderPadding.right), height );
}
}
#endif
}
} else {
height = aReflowState.mComputedHeight;
//if (aCachedAvailableSize.height == kSizeNotSet) {
// //aBailOnHeight = aCachedAvailableSize.height == aCacheSize.height;
aBailOnHeight = PR_FALSE;
//} else {
aBailOnHeight = height == (aCacheSize.height - aReflowState.mComputedBorderPadding.left - aReflowState.mComputedBorderPadding.right);
//}
#ifdef FCF_NOISY
if (aBailOnHeight) {
printf("-------------- #3 Bailing on aCachedAvailableSize.height %d == aReflowState.mComputedHeight %d\n", aCachedAvailableSize.height, height );
}
#endif
}
if (aBailOnWidth || aBailOnHeight) {
aDesiredSize.width = aCacheSize.width;
aDesiredSize.height = aCacheSize.height;
aDesiredSize.ascent = aCachedAscent;
aDesiredSize.descent = aDesiredSize.height - aDesiredSize.ascent;
if (aDesiredSize.mComputeMEW) {
aDesiredSize.mMaxElementWidth = aCachedMaxElementWidth;
}
}
}
}
void
nsFormControlFrame::GetDesiredSize(nsPresContext* aPresContext,
const nsHTMLReflowState& aReflowState,
nsHTMLReflowMetrics& aDesiredSize)
{
// get the css size and let the frame use or override it
nsSize styleSize;
GetStyleSize(aPresContext, aReflowState, styleSize);
// subclasses should always override this method, but if not and no css, make it small
aDesiredSize.width = (styleSize.width > CSS_NOTSET) ? styleSize.width : 144;
aDesiredSize.height = (styleSize.height > CSS_NOTSET) ? styleSize.height : 144;
aDesiredSize.ascent = aDesiredSize.height;
aDesiredSize.descent = 0;
if (aDesiredSize.mComputeMEW) {
aDesiredSize.SetMEWToActualWidth(aReflowState.mStylePosition->mWidth.GetUnit());
}
}
NS_IMETHODIMP
nsFormControlFrame::DidReflow(nsPresContext* aPresContext,
const nsHTMLReflowState* aReflowState,
nsDidReflowStatus aStatus)
{
nsresult rv = nsLeafFrame::DidReflow(aPresContext, aReflowState, aStatus);
// The view is created hidden; once we have reflowed it and it has been
// positioned then we show it.
if (NS_FRAME_REFLOW_FINISHED == aStatus) {
nsIView* view = GetView();
if (view) {
nsViewVisibility newVis = GetStyleVisibility()->IsVisible()
? nsViewVisibility_kShow
: nsViewVisibility_kHide;
// only change if different.
if (newVis != view->GetVisibility()) {
nsIViewManager* vm = view->GetViewManager();
if (vm) {
vm->SetViewVisibility(view, newVis);
}
}
}
}
return rv;
}
NS_IMETHODIMP
nsFormControlFrame::SetInitialChildList(nsIAtom* aListName,
nsIFrame* aChildList)
{
return NS_OK;
}
NS_METHOD
nsFormControlFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
DO_GLOBAL_REFLOW_COUNT("nsFormControlFrame", aReflowState.reason);
DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
if (!mDidInit) {
RegUnRegAccessKey(NS_STATIC_CAST(nsIFrame*, this), PR_TRUE);
mDidInit = PR_TRUE;
}
nsresult rv = nsLeafFrame::Reflow(aPresContext, aDesiredSize, aReflowState, aStatus);
aStatus = NS_FRAME_COMPLETE;
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
aDesiredSize.mOverflowArea = nsRect(0, 0, aDesiredSize.width, aDesiredSize.height);
FinishAndStoreOverflow(&aDesiredSize);
return rv;
}
nsresult
nsFormControlFrame::RegUnRegAccessKey(nsIFrame * aFrame, PRBool aDoReg)
{
NS_ENSURE_ARG_POINTER(aFrame);
nsPresContext* presContext = aFrame->GetPresContext();
NS_ASSERTION(presContext, "aPresContext is NULL in RegUnRegAccessKey!");
nsAutoString accessKey;
nsIContent* content = aFrame->GetContent();
content->GetAttr(kNameSpaceID_None, nsHTMLAtoms::accesskey, accessKey);
if (!accessKey.IsEmpty()) {
nsIEventStateManager *stateManager = presContext->EventStateManager();
if (aDoReg) {
return stateManager->RegisterAccessKey(content, (PRUint32)accessKey.First());
} else {
return stateManager->UnregisterAccessKey(content, (PRUint32)accessKey.First());
}
}
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::GetStyleSize(nsPresContext* aPresContext,
const nsHTMLReflowState& aReflowState,
nsSize& aSize)
{
if (aReflowState.mComputedWidth != NS_INTRINSICSIZE) {
aSize.width = aReflowState.mComputedWidth;
}
else {
aSize.width = CSS_NOTSET;
}
if (aReflowState.mComputedHeight != NS_INTRINSICSIZE) {
aSize.height = aReflowState.mComputedHeight;
}
else {
aSize.height = CSS_NOTSET;
}
}
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;
}
nsresult
nsFormControlFrame::GetScreenHeight(nsPresContext* aPresContext,
nscoord& aHeight)
{
nsRect screen;
nsIDeviceContext *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);
float devUnits;
devUnits = context->DevUnitsToAppUnits();
aHeight = NSToIntRound(float(screen.height) / devUnits );
return NS_OK;
}
// Calculate a frame's position in screen coordinates
nsresult
nsFormControlFrame::GetAbsoluteFramePosition(nsPresContext* aPresContext,
nsIFrame *aFrame,
nsRect& aAbsoluteTwipsRect,
nsRect& aAbsolutePixelRect)
{
nsresult rv = NS_OK;
aAbsoluteTwipsRect = aFrame->GetRect();
// zero these out,
// because the GetOffsetFromView figures them out
// XXXbz why do we need to do this, really? Will we ever fail to
// get a containing view?
aAbsoluteTwipsRect.x = 0;
aAbsoluteTwipsRect.y = 0;
// Get conversions between twips and pixels
float t2p;
float p2t;
t2p = aPresContext->TwipsToPixels();
p2t = aPresContext->PixelsToTwips();
// Start with frame's offset from it it's containing view
nsIView *view = nsnull;
nsPoint frameOffset;
rv = aFrame->GetOffsetFromView(frameOffset, &view);
if (NS_SUCCEEDED(rv) && view) {
aAbsoluteTwipsRect.MoveTo(frameOffset);
nsIWidget* widget;
// Walk up the views, looking for a widget
do {
// add in the offset of the view from its parent.
aAbsoluteTwipsRect += view->GetPosition();
widget = view->GetWidget();
if (widget) {
// account for space above and to the left of the view origin.
// the widget is aligned with view's bounds, not its origin
nsRect bounds = view->GetBounds();
aAbsoluteTwipsRect.x -= bounds.x;
aAbsoluteTwipsRect.y -= bounds.y;
// Add in the absolute offset of the widget.
nsRect absBounds;
nsRect zeroRect;
// XXX a twip version of this would be really nice here!
widget->WidgetToScreen(zeroRect, absBounds);
// Convert widget coordinates to twips
aAbsoluteTwipsRect.x += NSIntPixelsToTwips(absBounds.x, p2t);
aAbsoluteTwipsRect.y += NSIntPixelsToTwips(absBounds.y, p2t);
break;
}
view = view->GetParent();
} while (view);
}
// convert to pixel coordinates
if (NS_SUCCEEDED(rv)) {
aAbsolutePixelRect.x = NSTwipsToIntPixels(aAbsoluteTwipsRect.x, t2p);
aAbsolutePixelRect.y = NSTwipsToIntPixels(aAbsoluteTwipsRect.y, t2p);
aAbsolutePixelRect.width = NSTwipsToIntPixels(aAbsoluteTwipsRect.width, t2p);
aAbsolutePixelRect.height = NSTwipsToIntPixels(aAbsoluteTwipsRect.height, t2p);
}
return rv;
}