pjs/layout/generic/nsHTMLContainerFrame.cpp

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/* -*- 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 "nsHTMLContainerFrame.h"
#include "nsIRenderingContext.h"
#include "nsIPresContext.h"
#include "nsIPresShell.h"
#include "nsIStyleContext.h"
#include "nsStyleConsts.h"
#include "nsCSSRendering.h"
#include "nsIContent.h"
#include "nsHTMLAtoms.h"
#include "nsIWidget.h"
#include "nsILinkHandler.h"
#include "nsHTMLValue.h"
#include "nsGUIEvent.h"
#include "nsIDocument.h"
#include "nsIURL.h"
#include "nsIPtr.h"
#include "nsAbsoluteFrame.h"
#include "nsPlaceholderFrame.h"
#include "nsIHTMLContent.h"
#include "nsHTMLParts.h"
#include "nsIView.h"
#include "nsIViewManager.h"
#include "nsViewsCID.h"
#include "nsIReflowCommand.h"
#include "nsHTMLIIDs.h"
#include "nsDOMEvent.h"
NS_DEF_PTR(nsIStyleContext);
NS_IMETHODIMP
nsHTMLContainerFrame::Paint(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect)
{
// Probe for a JS onPaint event handler
nsIHTMLContent* hc;
if (mContent && NS_OK == mContent->QueryInterface(kIHTMLContentIID, (void**)&hc)) {
nsHTMLValue val;
if (NS_CONTENT_ATTR_HAS_VALUE ==
hc->GetAttribute(nsHTMLAtoms::onpaint, val)) {
nsEventStatus es;
nsresult rv;
nsRect r(aDirtyRect);
nsPaintEvent event;
event.eventStructType = NS_PAINT_EVENT;
event.message = NS_PAINT;
event.point.x = 0;
event.point.y = 0;
event.time = 0;
event.widget = nsnull;
event.nativeMsg = nsnull;
event.renderingContext = &aRenderingContext;
event.rect = &r;
rv = mContent->HandleDOMEvent(aPresContext, &event, nsnull, DOM_EVENT_INIT, es);
if (NS_OK == rv) {
}
}
NS_RELEASE(hc);
}
const nsStyleDisplay* disp = (const nsStyleDisplay*)
mStyleContext->GetStyleData(eStyleStruct_Display);
if (disp->mVisible && mRect.width && mRect.height) {
// Paint our background and border
PRIntn skipSides = GetSkipSides();
const nsStyleColor* color =
(const nsStyleColor*)mStyleContext->GetStyleData(eStyleStruct_Color);
const nsStyleSpacing* spacing =
(const nsStyleSpacing*)mStyleContext->GetStyleData(eStyleStruct_Spacing);
nsRect rect(0, 0, mRect.width, mRect.height);
nsCSSRendering::PaintBackground(aPresContext, aRenderingContext, this,
aDirtyRect, rect, *color, 0, 0);
nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, this,
aDirtyRect, rect, *spacing, skipSides);
}
// Now paint the kids. Note that child elements have the opportunity to
// override the visibility property and display even if their parent is
// hidden
PaintChildren(aPresContext, aRenderingContext, aDirtyRect);
return NS_OK;
}
nsPlaceholderFrame*
nsHTMLContainerFrame::CreatePlaceholderFrame(nsIPresContext& aPresContext,
nsIFrame* aFloatedFrame)
{
nsIContent* content;
aFloatedFrame->GetContent(content);
// Let the placeholder share the same style context as the floated element
nsIStyleContext* kidSC;
aFloatedFrame->GetStyleContext(kidSC);
nsPlaceholderFrame* placeholder;
NS_NewPlaceholderFrame((nsIFrame**)&placeholder);
placeholder->Init(aPresContext, content, this, kidSC);
placeholder->SetAnchoredItem(aFloatedFrame);
NS_IF_RELEASE(content);
NS_RELEASE(kidSC);
return placeholder;
}
nsAbsoluteFrame*
nsHTMLContainerFrame::CreateAbsolutePlaceholderFrame(nsIPresContext& aPresContext,
nsIFrame* aAbsoluteFrame)
{
nsIContent* content;
aAbsoluteFrame->GetContent(content);
// Let the placeholder share the same style context as the floated element
nsIStyleContext* kidSC;
aAbsoluteFrame->GetStyleContext(kidSC);
nsAbsoluteFrame* placeholder;
NS_NewAbsoluteFrame((nsIFrame**)&placeholder);
placeholder->Init(aPresContext, content, this, kidSC);
placeholder->SetAbsoluteFrame(aAbsoluteFrame);
NS_IF_RELEASE(content);
NS_RELEASE(kidSC);
return placeholder;
}
// XXX pass in aFrame's style context instead
PRBool
nsHTMLContainerFrame::MoveFrameOutOfFlow(nsIPresContext& aPresContext,
nsIFrame* aFrame,
const nsStyleDisplay* aDisplay,
const nsStylePosition* aPosition,
nsIFrame*& aPlaceholderFrame)
{
// Initialize OUT parameter
aPlaceholderFrame = nsnull;
// See if the element wants to be floated or absolutely positioned
PRBool isFloated =
(NS_STYLE_FLOAT_LEFT == aDisplay->mFloats) ||
(NS_STYLE_FLOAT_RIGHT == aDisplay->mFloats);
PRBool isAbsolute = NS_STYLE_POSITION_ABSOLUTE == aPosition->mPosition;
if (isFloated || isAbsolute) {
nsIFrame* nextSibling;
// Set aFrame's next sibling to nsnull, and remember the current next
// sibling pointer
aFrame->GetNextSibling(nextSibling);
aFrame->SetNextSibling(nsnull);
nsIFrame* frameToWrapWithAView = aFrame;
if (isFloated) {
// Create a placeholder frame that will serve as the anchor point.
nsPlaceholderFrame* placeholder =
CreatePlaceholderFrame(aPresContext, aFrame);
aPlaceholderFrame = placeholder;
} else {
// Create a placeholder frame that will serve as the anchor point.
nsAbsoluteFrame* placeholder =
CreateAbsolutePlaceholderFrame(aPresContext, aFrame);
aPlaceholderFrame = placeholder;
}
// Set the placeholder's next sibling to what aFrame's next sibling was
aPlaceholderFrame->SetNextSibling(nextSibling);
return PR_TRUE;
}
return PR_FALSE;
}
//XXX handle replace reflow command
NS_METHOD nsHTMLContainerFrame::AddFrame(const nsHTMLReflowState& aReflowState,
nsIFrame * aAddedFrame)
{
nsresult rv=NS_OK;
nsIReflowCommand::ReflowType type;
aReflowState.reflowCommand->GetType(type);
// we have a generic frame that gets inserted but doesn't effect reflow
// hook it up then ignore it
if (nsIReflowCommand::FrameAppended==type)
{ // frameAppended reflow -- find the last child and make aInsertedFrame its next sibling
nsIFrame *lastChild=mFirstChild;
nsIFrame *nextChild=mFirstChild;
while (nsnull!=nextChild)
{
lastChild=nextChild;
nextChild->GetNextSibling(nextChild);
}
if (nsnull==lastChild)
mFirstChild = aAddedFrame;
else
lastChild->SetNextSibling(aAddedFrame);
}
else if (nsIReflowCommand::FrameInserted==type)
{ // frameInserted reflow -- hook up aInsertedFrame as prevSibling's next sibling,
// and be sure to hook in aInsertedFrame's nextSibling (from prevSibling)
nsIFrame *prevSibling=nsnull;
rv = aReflowState.reflowCommand->GetPrevSiblingFrame(prevSibling);
if (NS_SUCCEEDED(rv) && (nsnull!=prevSibling))
{
nsIFrame *nextSibling=nsnull;
prevSibling->GetNextSibling(nextSibling);
prevSibling->SetNextSibling(aAddedFrame);
aAddedFrame->SetNextSibling(nextSibling);
}
else
{
nsIFrame *nextSibling = mFirstChild;
mFirstChild = aAddedFrame;
aAddedFrame->SetNextSibling(nextSibling);
}
}
else
{
NS_ASSERTION(PR_FALSE, "bad reflow type");
rv = NS_ERROR_UNEXPECTED;
}
return rv;
}
/** */
NS_METHOD nsHTMLContainerFrame::RemoveFrame(nsIFrame * aRemovedFrame)
{
nsIFrame *prevChild=nsnull;
nsIFrame *nextChild=mFirstChild;
while (nextChild!=aRemovedFrame)
{
prevChild=nextChild;
nextChild->GetNextSibling(nextChild);
}
nextChild=nsnull;
aRemovedFrame->GetNextSibling(nextChild);
if (nsnull==prevChild) // objectFrame was first child
mFirstChild = nextChild;
else
prevChild->SetNextSibling(nextChild);
return NS_OK;;
}
/**
* Create a next-in-flow for aFrame. Will return the newly created
* frame in aNextInFlowResult <b>if and only if</b> a new frame is
* created; otherwise nsnull is returned in aNextInFlowResult.
*/
nsresult
nsHTMLContainerFrame::CreateNextInFlow(nsIPresContext& aPresContext,
nsIFrame* aOuterFrame,
nsIFrame* aFrame,
nsIFrame*& aNextInFlowResult)
{
aNextInFlowResult = nsnull;
nsIFrame* nextInFlow;
aFrame->GetNextInFlow(nextInFlow);
if (nsnull == nextInFlow) {
// Create a continuation frame for the child frame and insert it
// into our lines child list.
nsIFrame* nextFrame;
aFrame->GetNextSibling(nextFrame);
nsIStyleContext* kidSC;
aFrame->GetStyleContext(kidSC);
aFrame->CreateContinuingFrame(aPresContext, aOuterFrame,
kidSC, nextInFlow);
NS_RELEASE(kidSC);
if (nsnull == nextInFlow) {
return NS_ERROR_OUT_OF_MEMORY;
}
aFrame->SetNextSibling(nextInFlow);
nextInFlow->SetNextSibling(nextFrame);
NS_FRAME_LOG(NS_FRAME_TRACE_NEW_FRAMES,
("nsInlineReflow::MaybeCreateNextInFlow: frame=%p nextInFlow=%p",
aFrame, nextInFlow));
aNextInFlowResult = nextInFlow;
}
return NS_OK;
}
nsresult
nsHTMLContainerFrame::CreateViewForFrame(nsIPresContext& aPresContext,
nsIFrame* aFrame,
nsIStyleContext* aStyleContext,
PRBool aForce)
{
nsIView* view;
aFrame->GetView(view);
// If we don't yet have a view, see if we need a view
if (nsnull == view) {
PRInt32 zIndex = 0;
// Get nsStyleColor and nsStyleDisplay
const nsStyleColor* color = (const nsStyleColor*)
aStyleContext->GetStyleData(eStyleStruct_Color);
const nsStyleDisplay* display = (const nsStyleDisplay*)
aStyleContext->GetStyleData(eStyleStruct_Display);
if (color->mOpacity != 1.0f) {
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
("nsHTMLContainerFrame::CreateViewForFrame: frame=%p opacity=%g",
aFrame, color->mOpacity));
aForce = PR_TRUE;
}
// See if the frame is being relatively positioned or absolutely
// positioned
if (!aForce) {
const nsStylePosition* position = (const nsStylePosition*)
aStyleContext->GetStyleData(eStyleStruct_Position);
if (NS_STYLE_POSITION_RELATIVE == position->mPosition) {
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
("nsHTMLContainerFrame::CreateViewForFrame: frame=%p relatively positioned",
aFrame));
aForce = PR_TRUE;
} else if (NS_STYLE_POSITION_ABSOLUTE == position->mPosition) {
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
("nsHTMLContainerFrame::CreateViewForFrame: frame=%p relatively positioned",
aFrame));
aForce = PR_TRUE;
// Get the z-index to use. This only applies to positioned elements
if (position->mZIndex.GetUnit() == eStyleUnit_Integer) {
zIndex = position->mZIndex.GetIntValue();
}
// XXX CSS2 says clip applies to block-level and replaced elements with
// overflow set to other than 'visible'. Where should this go?
#if 0
// Is there a clip rect specified?
nsViewClip clip = {0, 0, 0, 0};
PRUint8 clipType = (display->mClipFlags & NS_STYLE_CLIP_TYPE_MASK);
nsViewClip* pClip = nsnull;
if (NS_STYLE_CLIP_RECT == clipType) {
if ((NS_STYLE_CLIP_LEFT_AUTO & display->mClipFlags) == 0) {
clip.mLeft = display->mClip.left;
}
if ((NS_STYLE_CLIP_RIGHT_AUTO & display->mClipFlags) == 0) {
clip.mRight = display->mClip.right;
}
if ((NS_STYLE_CLIP_TOP_AUTO & display->mClipFlags) == 0) {
clip.mTop = display->mClip.top;
}
if ((NS_STYLE_CLIP_BOTTOM_AUTO & display->mClipFlags) == 0) {
clip.mBottom = display->mClip.bottom;
}
pClip = &clip;
}
else if (NS_STYLE_CLIP_INHERIT == clipType) {
// XXX need to handle clip inherit (get from parent style context)
NS_NOTYETIMPLEMENTED("clip inherit");
}
#endif
}
}
// See if the frame is a scrolled frame
if (!aForce) {
nsIAtom* pseudoTag;
aStyleContext->GetPseudoType(pseudoTag);
if (pseudoTag == nsHTMLAtoms::scrolledContentPseudo) {
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
("nsHTMLContainerFrame::CreateViewForFrame: scrolled frame=%p", aFrame));
aForce = PR_TRUE;
}
NS_IF_RELEASE(pseudoTag);
}
if (aForce) {
// Create a view
nsIFrame* parent;
nsIView* view;
aFrame->GetParentWithView(parent);
NS_ASSERTION(parent, "GetParentWithView failed");
nsIView* parView;
parent->GetView(parView);
NS_ASSERTION(parView, "no parent with view");
// Create a view
static NS_DEFINE_IID(kViewCID, NS_VIEW_CID);
static NS_DEFINE_IID(kIViewIID, NS_IVIEW_IID);
nsresult result = nsRepository::CreateInstance(kViewCID,
nsnull,
kIViewIID,
(void **)&view);
if (NS_OK == result) {
nsIView* rootView = parView;
nsIViewManager* viewManager;
rootView->GetViewManager(viewManager);
// Initialize the view
NS_ASSERTION(nsnull != viewManager, "null view manager");
nsRect bounds;
aFrame->GetRect(bounds);
view->Init(viewManager, bounds, rootView);
viewManager->InsertChild(rootView, view, zIndex);
// If the background color is transparent or the visibility is hidden
// then mark the view as having transparent content.
// XXX We could try and be smarter about this and check whether there's
// a background image. If there is a background image and the image is
// fully opaque then we don't need to mark the view as having transparent
// content...
if ((NS_STYLE_BG_COLOR_TRANSPARENT & color->mBackgroundFlags) ||
!display->mVisible) {
viewManager->SetViewContentTransparency(view, PR_TRUE);
}
viewManager->SetViewOpacity(view, color->mOpacity);
NS_RELEASE(viewManager);
}
// Remember our view
aFrame->SetView(view);
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
("nsHTMLContainerFrame::CreateViewForFrame: frame=%p view=%p",
aFrame));
return result;
}
}
return NS_OK;
}
void
nsHTMLContainerFrame::UpdateStyleContexts(nsIPresContext& aPresContext,
nsIFrame* aFrame,
nsIFrame* aOldParent,
nsIFrame* aNewParent)
{
nsIStyleContext* oldParentSC;
aOldParent->GetStyleContext(oldParentSC);
nsIStyleContext* newParentSC;
aNewParent->GetStyleContext(newParentSC);
if (oldParentSC != newParentSC) {
aFrame->ReResolveStyleContext(&aPresContext, newParentSC);
}
NS_RELEASE(oldParentSC);
NS_RELEASE(newParentSC);
}