gecko-dev/layout/generic/nsLeafFrame.cpp
1998-07-22 05:02:07 +00:00

124 lines
4.5 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#include "nsLeafFrame.h"
#include "nsIStyleContext.h"
#include "nsCSSRendering.h"
#include "nsHTMLParts.h"
#include "nsIPresShell.h"
nsLeafFrame::nsLeafFrame(nsIContent* aContent, nsIFrame* aParentFrame)
: nsFrame(aContent, aParentFrame)
{
}
nsLeafFrame::~nsLeafFrame()
{
}
NS_METHOD nsLeafFrame::Paint(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect)
{
const nsStyleDisplay* disp =
(const nsStyleDisplay*)mStyleContext->GetStyleData(eStyleStruct_Display);
if (disp->mVisible) {
const nsStyleColor* myColor =
(const nsStyleColor*)mStyleContext->GetStyleData(eStyleStruct_Color);
const nsStyleSpacing* mySpacing =
(const nsStyleSpacing*)mStyleContext->GetStyleData(eStyleStruct_Spacing);
nsRect rect(0, 0, mRect.width, mRect.height);
nsCSSRendering::PaintBackground(aPresContext, aRenderingContext, this,
aDirtyRect, rect, *myColor);
nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, this,
aDirtyRect, rect, *mySpacing, 0);
}
return NS_OK;
}
NS_METHOD nsLeafFrame::Reflow(nsIPresContext& aPresContext,
nsReflowMetrics& aDesiredSize,
const nsReflowState& aReflowState,
nsReflowStatus& aStatus)
{
NS_PRECONDITION(mState & NS_FRAME_IN_REFLOW, "frame is not in reflow");
// XXX add in code to check for width/height being set via css
// and if set use them instead of calling GetDesiredSize.
GetDesiredSize(&aPresContext, aReflowState, aDesiredSize);
AddBordersAndPadding(&aPresContext, aDesiredSize);
if (nsnull != aDesiredSize.maxElementSize) {
aDesiredSize.maxElementSize->width = aDesiredSize.width;
aDesiredSize.maxElementSize->height = aDesiredSize.height;
}
aStatus = NS_FRAME_COMPLETE;
return NS_OK;
}
// XXX how should border&padding effect baseline alignment?
// => descent = borderPadding.bottom for example
void nsLeafFrame::AddBordersAndPadding(nsIPresContext* aPresContext,
nsReflowMetrics& aDesiredSize)
{
const nsStyleSpacing* space =
(const nsStyleSpacing*)mStyleContext->GetStyleData(eStyleStruct_Spacing);
nsMargin borderPadding;
space->CalcBorderPaddingFor(this, borderPadding);
aDesiredSize.width += borderPadding.left + borderPadding.right;
aDesiredSize.height += borderPadding.top + borderPadding.bottom;
aDesiredSize.ascent = aDesiredSize.height;
aDesiredSize.descent = 0;
}
void nsLeafFrame::GetInnerArea(nsIPresContext* aPresContext,
nsRect& aInnerArea) const
{
const nsStyleSpacing* space =
(const nsStyleSpacing*)mStyleContext->GetStyleData(eStyleStruct_Spacing);
nsMargin borderPadding;
space->CalcBorderPaddingFor(this, borderPadding);
aInnerArea.x = borderPadding.left;
aInnerArea.y = borderPadding.top;
aInnerArea.width = mRect.width -
(borderPadding.left + borderPadding.right);
aInnerArea.height = mRect.height -
(borderPadding.top + borderPadding.bottom);
}
NS_METHOD nsLeafFrame::ContentChanged(nsIPresShell* aShell,
nsIPresContext* aPresContext,
nsIContent* aChild,
nsISupports* aSubContent)
{
// Generate a reflow command with this frame as the target frame
nsIReflowCommand* cmd;
nsresult result;
result = NS_NewHTMLReflowCommand(&cmd, this, nsIReflowCommand::ContentChanged);
if (NS_OK == result) {
aShell->AppendReflowCommand(cmd);
NS_RELEASE(cmd);
}
return result;
}