gecko-dev/layout/forms/nsFormControlFrame.cpp

313 строки
9.8 KiB
C++
Исходник Обычный вид История

/* -*- 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
1998-09-23 21:44:33 +04:00
*
* 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/
1998-09-23 21:44:33 +04:00
*
* 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.
1998-09-23 21:44:33 +04:00
*
* 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 ***** */
1998-09-23 21:44:33 +04:00
#include "nsFormControlFrame.h"
#include "nsHTMLAtoms.h"
#include "nsIDOMHTMLInputElement.h"
#include "nsIEventStateManager.h"
#include "nsIScrollableView.h"
#include "nsILookAndFeel.h"
1998-12-15 22:03:36 +03:00
//#define FCF_NOISY
const PRInt32 kSizeNotSet = -1;
1998-09-23 21:44:33 +04:00
nsFormControlFrame::nsFormControlFrame(nsStyleContext* aContext) :
nsLeafFrame(aContext),
mDidInit(PR_FALSE)
1998-09-23 21:44:33 +04:00
{
}
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();
1998-09-23 21:44:33 +04:00
}
// Frames are not refcounted, no need to AddRef
NS_IMETHODIMP
1998-09-23 21:44:33 +04:00
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))) {
1998-09-23 21:44:33 +04:00
*aInstancePtr = (void*) ((nsIFormControlFrame*) this);
return NS_OK;
}
return nsLeafFrame::QueryInterface(aIID, aInstancePtr);
}
nscoord
nsFormControlFrame::GetIntrinsicWidth()
{
// Intrinsic width is 144 twips. Why? I have no idea; that's what
// it was before I touched this code, and the original checkin
// comment is not so helpful.
return 144;
}
1998-09-23 21:44:33 +04:00
nscoord
nsFormControlFrame::GetIntrinsicHeight()
1998-09-23 21:44:33 +04:00
{
// Intrinsic height is 144 twips. Why? I have no idea; that's what
// it was before I touched this code, and the original checkin
// comment is not so helpful.
return 144;
1998-09-23 21:44:33 +04:00
}
NS_IMETHODIMP
nsFormControlFrame::DidReflow(nsPresContext* aPresContext,
const nsHTMLReflowState* aReflowState,
nsDidReflowStatus aStatus)
1998-09-23 21:44:33 +04:00
{
nsresult rv = nsLeafFrame::DidReflow(aPresContext, aReflowState, aStatus);
1998-09-23 21:44:33 +04:00
1998-09-23 21:44:33 +04:00
// 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) {
2003-07-04 16:50:32 +04:00
nsIView* view = GetView();
if (view) {
nsViewVisibility newVis = GetStyleVisibility()->IsVisible()
? nsViewVisibility_kShow
: nsViewVisibility_kHide;
// only change if different.
2003-07-04 16:50:32 +04:00
if (newVis != view->GetVisibility()) {
nsIViewManager* vm = view->GetViewManager();
if (vm) {
vm->SetViewVisibility(view, newVis);
}
}
1998-09-23 21:44:33 +04:00
}
}
1998-09-23 21:44:33 +04:00
return rv;
}
NS_IMETHODIMP
nsFormControlFrame::SetInitialChildList(nsIAtom* aListName,
nsIFrame* aChildList)
{
return NS_OK;
}
1998-09-23 21:44:33 +04:00
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(NS_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->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)
{
1998-09-23 21:44:33 +04:00
}
NS_METHOD
nsFormControlFrame::HandleEvent(nsPresContext* aPresContext,
1998-09-23 21:44:33 +04:00
nsGUIEvent* aEvent,
nsEventStatus* aEventStatus)
1998-09-23 21:44:33 +04:00
{
// 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);
1998-09-23 21:44:33 +04:00
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;
}
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;
2003-07-04 16:50:32 +04:00
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);
2003-07-04 16:50:32 +04:00
nsIWidget* widget;
// Walk up the views, looking for a widget
do {
// add in the offset of the view from its parent.
2003-07-04 16:50:32 +04:00
aAbsoluteTwipsRect += view->GetPosition();
2003-07-04 16:50:32 +04:00
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
2003-07-04 16:50:32 +04:00
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;
}
2003-07-04 16:50:32 +04:00
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;
}