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gecko-dev/layout/base/nsCSSFrameConstructor.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 "nsCSSFrameConstructor.h"
#include "nsIArena.h"
#include "nsCRT.h"
#include "nsIAtom.h"
#include "nsIURL.h"
#include "nsISupportsArray.h"
#include "nsHashtable.h"
#include "nsIHTMLContent.h"
#include "nsIHTMLAttributes.h"
#include "nsIStyleRule.h"
#include "nsIFrame.h"
#include "nsIStyleContext.h"
#include "nsHTMLAtoms.h"
#include "nsIPresContext.h"
#include "nsILinkHandler.h"
#include "nsIDocument.h"
#include "nsIHTMLTableCellElement.h"
#include "nsTableColFrame.h"
#include "nsHTMLIIDs.h"
#include "nsIStyleFrameConstruction.h"
#include "nsHTMLParts.h"
#include "nsIPresShell.h"
#include "nsIViewManager.h"
#include "nsStyleConsts.h"
#include "nsTableOuterFrame.h"
#include "nsIXMLDocument.h"
#include "nsIWebShell.h"
#include "nsHTMLContainerFrame.h"
#include "nsINameSpaceManager.h"
#include "nsLayoutAtoms.h"
#include "nsIDOMHTMLSelectElement.h"
#include "nsIComboboxControlFrame.h"
#include "nsIListControlFrame.h"
#include "nsDeque.h"
#include "nsIDOMCharacterData.h"
#include "nsIDOMHTMLImageElement.h"
#include "nsITextContent.h"
#ifdef INCLUDE_XUL
#include "nsXULAtoms.h"
#include "nsTreeFrame.h"
#include "nsToolboxFrame.h"
#include "nsToolbarFrame.h"
#include "nsTreeIndentationFrame.h"
#include "nsTreeCellFrame.h"
nsresult
NS_NewProgressMeterFrame ( nsIFrame*& aNewFrame );
nsresult
NS_NewTitledButtonFrame ( nsIFrame*& aNewFrame );
/*
#include "nsProgressMeterFrame.h"
#include "nsTitledButtonFrame.h"
*/
#endif
//#define FRAMEBASED_COMPONENTS 1 // This is temporary please leave in for now - rods
//static NS_DEFINE_IID(kIStyleRuleIID, NS_ISTYLE_RULE_IID);
static NS_DEFINE_IID(kIStyleFrameConstructionIID, NS_ISTYLE_FRAME_CONSTRUCTION_IID);
static NS_DEFINE_IID(kIHTMLTableCellElementIID, NS_IHTMLTABLECELLELEMENT_IID);
static NS_DEFINE_IID(kIXMLDocumentIID, NS_IXMLDOCUMENT_IID);
static NS_DEFINE_IID(kIWebShellIID, NS_IWEB_SHELL_IID);
static NS_DEFINE_IID(kIDOMHTMLSelectElementIID, NS_IDOMHTMLSELECTELEMENT_IID);
static NS_DEFINE_IID(kIComboboxControlFrameIID, NS_ICOMBOBOXCONTROLFRAME_IID);
static NS_DEFINE_IID(kIListControlFrameIID, NS_ILISTCONTROLFRAME_IID);
static NS_DEFINE_IID(kIDOMHTMLImageElementIID, NS_IDOMHTMLIMAGEELEMENT_IID);
static NS_DEFINE_IID(kIDOMCharacterDataIID, NS_IDOMCHARACTERDATA_IID);
static NS_DEFINE_IID(kScrollViewIID, NS_ISCROLLABLEVIEW_IID);
// Structure used when constructing formatting object trees.
struct nsFrameItems {
nsIFrame* childList;
nsIFrame* lastChild;
nsFrameItems();
nsFrameItems(nsIFrame* aFrame);
// Appends the frame to the end of the list
void AddChild(nsIFrame* aChild);
};
nsFrameItems::nsFrameItems()
:childList(nsnull), lastChild(nsnull)
{}
nsFrameItems::nsFrameItems(nsIFrame* aFrame)
:childList(aFrame), lastChild(aFrame)
{}
void
nsFrameItems::AddChild(nsIFrame* aChild)
{
if (childList == nsnull) {
childList = lastChild = aChild;
}
else
{
lastChild->SetNextSibling(aChild);
lastChild = aChild;
}
}
// -----------------------------------------------------------
// Structure used when constructing formatting object trees. Contains
// state information needed for absolutely positioned elements
struct nsAbsoluteItems : nsFrameItems {
nsIFrame* const containingBlock; // containing block for absolutely positioned elements
nsAbsoluteItems(nsIFrame* aContainingBlock);
};
nsAbsoluteItems::nsAbsoluteItems(nsIFrame* aContainingBlock)
: containingBlock(aContainingBlock)
{
}
// -----------------------------------------------------------
// Structure used when creating table frames.
struct nsTableCreator {
virtual nsresult CreateTableFrame(nsIFrame*& aNewFrame);
virtual nsresult CreateTableRowGroupFrame(nsIFrame*& aNewFrame);
virtual nsresult CreateTableColFrame(nsIFrame*& aNewFrame);
virtual nsresult CreateTableColGroupFrame(nsIFrame*& aNewFrame);
virtual nsresult CreateTableRowFrame(nsIFrame*& aNewFrame);
virtual nsresult CreateTableCellFrame(nsIFrame*& aNewFrame);
};
nsresult
nsTableCreator::CreateTableFrame(nsIFrame*& aNewFrame) {
return NS_NewTableFrame(aNewFrame);
}
nsresult
nsTableCreator::CreateTableRowGroupFrame(nsIFrame*& aNewFrame) {
return NS_NewTableRowGroupFrame(aNewFrame);
}
nsresult
nsTableCreator::CreateTableColFrame(nsIFrame*& aNewFrame) {
return NS_NewTableColFrame(aNewFrame);
}
nsresult
nsTableCreator::CreateTableColGroupFrame(nsIFrame*& aNewFrame) {
return NS_NewTableColGroupFrame(aNewFrame);
}
nsresult
nsTableCreator::CreateTableRowFrame(nsIFrame*& aNewFrame) {
return NS_NewTableRowFrame(aNewFrame);
}
nsresult
nsTableCreator::CreateTableCellFrame(nsIFrame*& aNewFrame) {
return NS_NewTableCellFrame(aNewFrame);
}
#ifdef INCLUDE_XUL
// Structure used when creating tree frames
struct nsTreeCreator: public nsTableCreator {
nsresult CreateTableFrame(nsIFrame*& aNewFrame);
nsresult CreateTableCellFrame(nsIFrame*& aNewFrame);
};
nsresult
nsTreeCreator::CreateTableFrame(nsIFrame*& aNewFrame)
{
return NS_NewTreeFrame(aNewFrame);
}
nsresult
nsTreeCreator::CreateTableCellFrame(nsIFrame*& aNewFrame)
{
return NS_NewTreeCellFrame(aNewFrame);
}
#endif // INCLUDE_XUL
// -----------------------------------------------------------
nsCSSFrameConstructor::nsCSSFrameConstructor(void)
: nsIStyleFrameConstruction(),
mDocument(nsnull),
mInitialContainingBlock(nsnull),
mFixedContainingBlock(nsnull),
mDocElementContainingBlock(nsnull)
{
NS_INIT_REFCNT();
#ifdef INCLUDE_XUL
nsXULAtoms::AddrefAtoms();
nsHTMLAtoms::AddrefAtoms();
#endif
}
nsCSSFrameConstructor::~nsCSSFrameConstructor(void)
{
#ifdef INCLUDE_XUL
nsXULAtoms::ReleaseAtoms();
nsHTMLAtoms::ReleaseAtoms();
#endif
}
NS_IMPL_ISUPPORTS(nsCSSFrameConstructor, kIStyleFrameConstructionIID);
NS_IMETHODIMP
nsCSSFrameConstructor::Init(nsIDocument* aDocument)
{
NS_PRECONDITION(aDocument, "null ptr");
if (! aDocument)
return NS_ERROR_NULL_POINTER;
if (mDocument)
return NS_ERROR_ALREADY_INITIALIZED;
mDocument = aDocument; // not refcounted!
return NS_OK;
}
/**
* Request to process the child content elements and create frames.
*
* @param aContent the content object whose child elements to process
* @param aFrame the the associated with aContent. This will be the
* parent frame (both content and geometric) for the flowed
* child frames
* @param aState the state information associated with the current process
* @param aChildList an OUT parameter. This is the list of flowed child
* frames that should go in the principal child list
* @param aLastChildInList contains a pointer to the last child in aChildList
*/
nsresult
nsCSSFrameConstructor::ProcessChildren(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aFrame,
nsAbsoluteItems& aAbsoluteItems,
nsFrameItems& aFrameItems,
nsAbsoluteItems& aFixedItems)
{
// Iterate the child content objects and construct a frame
PRInt32 count;
aContent->ChildCount(count);
for (PRInt32 i = 0; i < count; i++) {
nsCOMPtr<nsIContent> childContent;
if (NS_SUCCEEDED(aContent->ChildAt(i, *getter_AddRefs(childContent)))) {
// Construct a child frame
ConstructFrame(aPresContext, childContent, aFrame, aAbsoluteItems,
aFrameItems, aFixedItems);
}
}
return NS_OK;
}
nsresult
nsCSSFrameConstructor::CreateInputFrame(nsIContent* aContent, nsIFrame*& aFrame)
{
nsresult rv;
// Figure out which type of input frame to create
nsAutoString val;
if (NS_OK == aContent->GetAttribute(kNameSpaceID_HTML, nsHTMLAtoms::type, val)) {
if (val.EqualsIgnoreCase("submit")) {
rv = NS_NewButtonControlFrame(aFrame);
}
else if (val.EqualsIgnoreCase("reset")) {
rv = NS_NewButtonControlFrame(aFrame);
}
else if (val.EqualsIgnoreCase("button")) {
rv = NS_NewButtonControlFrame(aFrame);
}
else if (val.EqualsIgnoreCase("checkbox")) {
rv = NS_NewCheckboxControlFrame(aFrame);
}
else if (val.EqualsIgnoreCase("file")) {
rv = NS_NewFileControlFrame(aFrame);
}
else if (val.EqualsIgnoreCase("hidden")) {
rv = NS_NewButtonControlFrame(aFrame);
}
else if (val.EqualsIgnoreCase("image")) {
rv = NS_NewImageControlFrame(aFrame);
}
else if (val.EqualsIgnoreCase("password")) {
rv = NS_NewTextControlFrame(aFrame);
}
else if (val.EqualsIgnoreCase("radio")) {
rv = NS_NewRadioControlFrame(aFrame);
}
else if (val.EqualsIgnoreCase("text")) {
rv = NS_NewTextControlFrame(aFrame);
}
else {
rv = NS_NewTextControlFrame(aFrame);
}
} else {
rv = NS_NewTextControlFrame(aFrame);
}
return rv;
}
/****************************************************
** BEGIN TABLE SECTION
****************************************************/
// too bad nsDeque requires such a class
class nsBenignFunctor: public nsDequeFunctor{
public:
virtual void* operator()(void* aObject) {
return aObject;
}
};
static nsBenignFunctor* gBenignFunctor = new nsBenignFunctor;
// Construct the outer, inner table frames and the children frames for the table.
// Tables can have any table-related child.
nsresult
nsCSSFrameConstructor::ConstructTableFrame(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIStyleContext* aStyleContext,
nsAbsoluteItems& aAbsoluteItems,
nsIFrame*& aNewFrame,
nsAbsoluteItems& aFixedItems,
nsTableCreator& aTableCreator)
{
nsresult rv = NS_OK;
nsIFrame* childList;
nsIFrame* innerFrame;
nsIFrame* innerChildList = nsnull;
nsIFrame* captionFrame = nsnull;
// Create an anonymous table outer frame which holds the caption and table frame
NS_NewTableOuterFrame(aNewFrame);
// Init the table outer frame and see if we need to create a view, e.g.
// the frame is absolutely positioned
aNewFrame->Init(*aPresContext, aContent, aParentFrame, aStyleContext);
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, aNewFrame,
aStyleContext, PR_FALSE);
nsCOMPtr<nsIStyleContext> parentStyleContext;
aParentFrame->GetStyleContext(getter_AddRefs(parentStyleContext));
#if 0
nsCOMPtr<nsIStyleContext> outerStyleContext;
aPresContext->ResolvePseudoStyleContextFor(aContent, nsHTMLAtoms::tableOuterPseudo,
parentStyleContext,
getter_AddRefs(outerStyleContext));
aNewFrame->Init(*aPresContext, aContent, aParentFrame, outerStyleContext);
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, aNewFrame,
outerStyleContext, PR_FALSE);
#endif
// Create the inner table frame
aTableCreator.CreateTableFrame(innerFrame);
// This gets reset later, since there may also be a caption.
// It allows descendants to get at the inner frame before that
aNewFrame->SetInitialChildList(*aPresContext, nsnull, innerFrame);
childList = innerFrame;
innerFrame->Init(*aPresContext, aContent, aNewFrame, aStyleContext);
nsIFrame* lastChildFrame = nsnull;
PRInt32 count;
aContent->ChildCount(count);
for (PRInt32 i = 0; i < count; i++) { // iterate the child content
nsCOMPtr<nsIContent> childContent;
if (NS_SUCCEEDED(aContent->ChildAt(i, *getter_AddRefs(childContent)))) {
nsIFrame* childFrame = nsnull;
nsIFrame* ignore;
nsCOMPtr<nsIStyleContext> childStyleContext;
// Resolve the style context and get its display
aPresContext->ResolveStyleContextFor(childContent, aStyleContext,
PR_FALSE,
getter_AddRefs(childStyleContext));
const nsStyleDisplay* styleDisplay = (const nsStyleDisplay*)
childStyleContext->GetStyleData(eStyleStruct_Display);
switch (styleDisplay->mDisplay) {
case NS_STYLE_DISPLAY_TABLE_CAPTION:
if (nsnull == captionFrame) { // only allow one caption
// XXX should absolute items be passed along?
rv = ConstructTableCaptionFrame(aPresContext, childContent, aNewFrame, childStyleContext,
aAbsoluteItems, ignore, captionFrame, aFixedItems, aTableCreator);
}
break;
case NS_STYLE_DISPLAY_TABLE_HEADER_GROUP:
case NS_STYLE_DISPLAY_TABLE_FOOTER_GROUP:
case NS_STYLE_DISPLAY_TABLE_ROW_GROUP:
case NS_STYLE_DISPLAY_TABLE_COLUMN_GROUP:
{
PRBool isRowGroup = (NS_STYLE_DISPLAY_TABLE_COLUMN_GROUP != styleDisplay->mDisplay);
rv = ConstructTableGroupFrame(aPresContext, childContent, innerFrame, childStyleContext,
aAbsoluteItems, isRowGroup, childFrame, ignore, aFixedItems, aTableCreator);
break;
}
case NS_STYLE_DISPLAY_TABLE_ROW:
rv = ConstructTableRowFrame(aPresContext, childContent, innerFrame, childStyleContext,
aAbsoluteItems, childFrame, ignore, aFixedItems, aTableCreator);
break;
case NS_STYLE_DISPLAY_TABLE_COLUMN:
rv = ConstructTableColFrame(aPresContext, childContent, innerFrame, childStyleContext,
aAbsoluteItems, childFrame, ignore, aFixedItems, aTableCreator);
break;
case NS_STYLE_DISPLAY_TABLE_CELL:
rv = ConstructTableCellFrame(aPresContext, childContent, innerFrame, childStyleContext,
aAbsoluteItems, childFrame, ignore, aFixedItems, aTableCreator);
break;
default:
//nsIFrame* nonTableRelatedFrame;
//nsIAtom* tag;
//childContent->GetTag(tag);
//ConstructFrameByTag(aPresContext, childContent, aNewFrame, tag, childStyleContext,
// aAbsoluteItems, nonTableRelatedFrame);
//childList->SetNextSibling(nonTableRelatedFrame);
//NS_IF_RELEASE(tag);
nsFrameItems childItems;
TableProcessChild(aPresContext, childContent, innerFrame, parentStyleContext,
aAbsoluteItems, childItems, aFixedItems, aTableCreator);
childFrame = childItems.childList; // XXX: Need to change this whole function to return a list of frames
// rather than a single frame. - DWH
break;
}
// for every table related frame except captions, link into the child list
if (nsnull != childFrame) {
if (nsnull == lastChildFrame) {
innerChildList = childFrame;
} else {
lastChildFrame->SetNextSibling(childFrame);
}
lastChildFrame = childFrame;
}
}
}
// Set the inner table frame's list of initial child frames
innerFrame->SetInitialChildList(*aPresContext, nsnull, innerChildList);
// Set the anonymous table outer frame's initial child list
aNewFrame->SetInitialChildList(*aPresContext, nsnull, childList);
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructAnonymousTableFrame (nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIFrame*& aOuterFrame,
nsIFrame*& aInnerFrame,
nsAbsoluteItems& aFixedItems,
nsTableCreator& aTableCreator)
{
nsresult result = NS_OK;
if (NS_SUCCEEDED(result)) {
nsCOMPtr<nsIStyleContext> parentStyleContext;
result = aParentFrame->GetStyleContext(getter_AddRefs(parentStyleContext));
if (NS_SUCCEEDED(result)) {
// create the outer table frames
nsCOMPtr<nsIStyleContext> outerStyleContext;
aPresContext->ResolvePseudoStyleContextFor(aContent, nsHTMLAtoms::tableOuterPseudo,
parentStyleContext,
PR_FALSE,
getter_AddRefs(outerStyleContext));
result = NS_NewTableOuterFrame(aOuterFrame);
if (NS_SUCCEEDED(result)) {
aOuterFrame->Init(*aPresContext, aContent, aParentFrame, outerStyleContext);
// create the inner table frames
nsCOMPtr<nsIStyleContext> innerStyleContext;
aPresContext->ResolvePseudoStyleContextFor(aContent, nsHTMLAtoms::tablePseudo,
outerStyleContext,
PR_FALSE,
getter_AddRefs(innerStyleContext));
result = aTableCreator.CreateTableFrame(aInnerFrame);
if (NS_SUCCEEDED(result)) {
aInnerFrame->Init(*aPresContext, aContent, aOuterFrame, innerStyleContext);
}
}
}
}
return result;
}
// if aParentFrame is a table, it is assummed that it is an outer table and the inner
// table is already a child
nsresult
nsCSSFrameConstructor::ConstructTableCaptionFrame(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIStyleContext* aStyleContext,
nsAbsoluteItems& aAbsoluteItems,
nsIFrame*& aNewTopMostFrame,
nsIFrame*& aNewCaptionFrame,
nsAbsoluteItems& aFixedItems,
nsTableCreator& aTableCreator)
{
nsresult rv = NS_NewAreaFrame(aNewCaptionFrame, 0);
if (NS_SUCCEEDED(rv)) {
const nsStyleDisplay* parentDisplay = GetDisplay(aParentFrame);
nsIFrame* innerFrame;
if (NS_STYLE_DISPLAY_TABLE == parentDisplay->mDisplay) { // parent is an outer table
aParentFrame->FirstChild(nsnull, &innerFrame);
aNewCaptionFrame->Init(*aPresContext, aContent, aParentFrame, aStyleContext);
innerFrame->SetNextSibling(aNewCaptionFrame);
// the caller is responsible for calling SetInitialChildList on the outer, inner frames
aNewTopMostFrame = aNewCaptionFrame;
} else { // parent is not a table, need to create a new table
nsIFrame* outerFrame;
ConstructAnonymousTableFrame(aPresContext, aContent, aParentFrame, outerFrame, innerFrame, aFixedItems, aTableCreator);
nsCOMPtr<nsIStyleContext> outerStyleContext;
outerFrame->GetStyleContext(getter_AddRefs(outerStyleContext));
nsCOMPtr<nsIStyleContext> adjStyleContext;
aPresContext->ResolveStyleContextFor(aContent, outerStyleContext,
PR_FALSE,
getter_AddRefs(adjStyleContext));
aNewCaptionFrame->Init(*aPresContext, aContent, outerFrame, adjStyleContext);
innerFrame->SetNextSibling(aNewCaptionFrame);
outerFrame->SetInitialChildList(*aPresContext, nsnull, innerFrame);
innerFrame->SetInitialChildList(*aPresContext, nsnull, nsnull);
aNewTopMostFrame = outerFrame;
}
nsFrameItems childItems;
ProcessChildren(aPresContext, aContent, aNewCaptionFrame, aAbsoluteItems,
childItems, aFixedItems);
aNewCaptionFrame->SetInitialChildList(*aPresContext, nsnull, childItems.childList);
}
return rv;
}
// if aParentFrame is a table, it is assummed that it is an inner table
nsresult
nsCSSFrameConstructor::ConstructTableGroupFrame(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIStyleContext* aStyleContext,
nsAbsoluteItems& aAbsoluteItems,
PRBool aIsRowGroup,
nsIFrame*& aNewTopMostFrame,
nsIFrame*& aNewGroupFrame,
nsAbsoluteItems& aFixedItems,
nsTableCreator& aTableCreator,
nsDeque* aToDo)
{
nsresult rv = NS_OK;
const nsStyleDisplay* styleDisplay = (const nsStyleDisplay*)
aStyleContext->GetStyleData(eStyleStruct_Display);
PRBool contentDisplayIsGroup =
(aIsRowGroup) ? (NS_STYLE_DISPLAY_TABLE_ROW_GROUP == styleDisplay->mDisplay) ||
(NS_STYLE_DISPLAY_TABLE_HEADER_GROUP == styleDisplay->mDisplay) ||
(NS_STYLE_DISPLAY_TABLE_FOOTER_GROUP == styleDisplay->mDisplay)
: (NS_STYLE_DISPLAY_TABLE_COLUMN_GROUP == styleDisplay->mDisplay);
nsCOMPtr<nsIStyleContext> styleContext( dont_QueryInterface(aStyleContext) );
nsCOMPtr<nsIStyleContext> parentStyleContext;
aParentFrame->GetStyleContext(getter_AddRefs(parentStyleContext));
const nsStyleDisplay* parentDisplay =
(const nsStyleDisplay*) parentStyleContext->GetStyleData(eStyleStruct_Display);
if (NS_STYLE_DISPLAY_TABLE == parentDisplay->mDisplay) { // parent is an inner table
if (!contentDisplayIsGroup) { // content is from some (soon to be) child of ours
nsIAtom* pseudoGroup = (aIsRowGroup) ? nsHTMLAtoms::tableRowGroupPseudo : nsHTMLAtoms::tableColGroupPseudo;
aPresContext->ResolvePseudoStyleContextFor(aContent, pseudoGroup, parentStyleContext,
PR_FALSE,
getter_AddRefs(styleContext));
}
rv = ConstructTableGroupFrameOnly(aPresContext, aContent, aParentFrame, styleContext,
aAbsoluteItems, aIsRowGroup, contentDisplayIsGroup,
aNewTopMostFrame, aNewGroupFrame, aFixedItems, aTableCreator);
} else { // construct anonymous table frames
nsIFrame* innerFrame;
nsIFrame* outerFrame;
ConstructAnonymousTableFrame(aPresContext, aContent, aParentFrame, outerFrame, innerFrame, aFixedItems, aTableCreator);
nsCOMPtr<nsIStyleContext> innerStyleContext;
innerFrame->GetStyleContext(getter_AddRefs(innerStyleContext));
if (contentDisplayIsGroup) {
aPresContext->ResolveStyleContextFor(aContent, innerStyleContext, PR_FALSE,
getter_AddRefs(styleContext));
} else {
nsIAtom* pseudoGroup = (aIsRowGroup) ? nsHTMLAtoms::tableRowGroupPseudo : nsHTMLAtoms::tableColGroupPseudo;
aPresContext->ResolvePseudoStyleContextFor(aContent, pseudoGroup, innerStyleContext,
PR_FALSE,
getter_AddRefs(styleContext));
}
rv = ConstructTableGroupFrameOnly(aPresContext, aContent, innerFrame, styleContext,
aAbsoluteItems, aIsRowGroup, contentDisplayIsGroup,
aNewTopMostFrame, aNewGroupFrame, aFixedItems, aTableCreator);
if (NS_SUCCEEDED(rv)) {
if (aToDo) { // some descendant will set the table's child lists later
aToDo->Push(innerFrame);
aToDo->Push(aNewTopMostFrame);
aToDo->Push(outerFrame);
aToDo->Push(innerFrame);
} else { // set the table's child lists now
innerFrame->SetInitialChildList(*aPresContext, nsnull, aNewTopMostFrame);
outerFrame->SetInitialChildList(*aPresContext, nsnull, innerFrame);
}
}
aNewTopMostFrame = outerFrame;
}
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructTableGroupFrameOnly(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIStyleContext* aStyleContext,
nsAbsoluteItems& aAbsoluteItems,
PRBool aIsRowGroup,
PRBool aProcessChildren,
nsIFrame*& aNewTopMostFrame,
nsIFrame*& aNewGroupFrame,
nsAbsoluteItems& aFixedItems,
nsTableCreator& aTableCreator)
{
nsresult rv = NS_OK;
const nsStyleDisplay* styleDisplay =
(const nsStyleDisplay*) aStyleContext->GetStyleData(eStyleStruct_Display);
if (IsScrollable(aPresContext, styleDisplay)) {
// Create a scroll frame and initialize it
rv = NS_NewScrollFrame(aNewTopMostFrame);
if (NS_SUCCEEDED(rv)) {
aNewTopMostFrame->Init(*aPresContext, aContent, aParentFrame, aStyleContext);
// The scroll frame gets the original style context, the scrolled frame gets
// a pseudo element style context that inherits the background properties
nsCOMPtr<nsIStyleContext> scrolledPseudoStyle;
aPresContext->ResolvePseudoStyleContextFor(aContent, nsHTMLAtoms::scrolledContentPseudo,
aStyleContext,
PR_FALSE,
getter_AddRefs(scrolledPseudoStyle));
// Create an area container for the frame
rv = (aIsRowGroup) ? aTableCreator.CreateTableRowGroupFrame(aNewGroupFrame)
: aTableCreator.CreateTableColGroupFrame(aNewGroupFrame);
if (NS_SUCCEEDED(rv)) {
// Initialize the frame and force it to have a view
aNewGroupFrame->Init(*aPresContext, aContent, aNewTopMostFrame, scrolledPseudoStyle);
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, aNewGroupFrame,
scrolledPseudoStyle, PR_TRUE);
aNewTopMostFrame->SetInitialChildList(*aPresContext, nsnull, aNewGroupFrame);
}
}
} else {
rv = (aIsRowGroup) ? aTableCreator.CreateTableRowGroupFrame(aNewTopMostFrame)
: aTableCreator.CreateTableColGroupFrame(aNewTopMostFrame);
if (NS_SUCCEEDED(rv)) {
aNewTopMostFrame->Init(*aPresContext, aContent, aParentFrame, aStyleContext);
aNewGroupFrame = aNewTopMostFrame;
}
}
if (NS_SUCCEEDED(rv)) {
if (aProcessChildren) {
nsFrameItems childItems;
if (aIsRowGroup) {
TableProcessChildren(aPresContext, aContent, aNewGroupFrame, aAbsoluteItems,
childItems, aFixedItems, aTableCreator);
} else {
ProcessChildren(aPresContext, aContent, aNewGroupFrame, aAbsoluteItems,
childItems, aFixedItems);
}
aNewGroupFrame->SetInitialChildList(*aPresContext, nsnull, childItems.childList);
}
}
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructTableRowFrame(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIStyleContext* aStyleContext,
nsAbsoluteItems& aAbsoluteItems,
nsIFrame*& aNewTopMostFrame,
nsIFrame*& aNewRowFrame,
nsAbsoluteItems& aFixedItems,
nsTableCreator& aTableCreator,
nsDeque* aToDo)
{
nsresult rv = NS_OK;
const nsStyleDisplay* display = (const nsStyleDisplay*)
aStyleContext->GetStyleData(eStyleStruct_Display);
PRBool contentDisplayIsRow = (NS_STYLE_DISPLAY_TABLE_ROW == display->mDisplay);
// if groupStyleContext gets set, both it and styleContext need to be released
nsCOMPtr<nsIStyleContext> groupStyleContext;
nsCOMPtr<nsIStyleContext> styleContext( dont_QueryInterface(aStyleContext) );
const nsStyleDisplay* parentDisplay = GetDisplay(aParentFrame);
if ((NS_STYLE_DISPLAY_TABLE_ROW_GROUP == parentDisplay->mDisplay) ||
(NS_STYLE_DISPLAY_TABLE_HEADER_GROUP == parentDisplay->mDisplay) ||
(NS_STYLE_DISPLAY_TABLE_FOOTER_GROUP == parentDisplay->mDisplay)) {
if (!contentDisplayIsRow) { // content is from some (soon to be) child of ours
aParentFrame = TableGetAsNonScrollFrame(aPresContext, aParentFrame, parentDisplay);
aParentFrame->GetStyleContext(getter_AddRefs(groupStyleContext));
aPresContext->ResolvePseudoStyleContextFor(aContent, nsHTMLAtoms::tableRowPseudo,
groupStyleContext,
PR_FALSE,
getter_AddRefs(styleContext));
}
// only process the row's children if the content display is row
rv = ConstructTableRowFrameOnly(aPresContext, aContent, aParentFrame, styleContext,
aAbsoluteItems, contentDisplayIsRow, aNewRowFrame, aFixedItems, aTableCreator);
aNewTopMostFrame = aNewRowFrame;
} else { // construct an anonymous row group frame
nsIFrame* groupFrame;
nsDeque* toDo = (aToDo) ? aToDo : new nsDeque(*gBenignFunctor);
rv = ConstructTableGroupFrame(aPresContext, aContent, aParentFrame, styleContext,
aAbsoluteItems, PR_TRUE, aNewTopMostFrame, groupFrame,
aFixedItems, aTableCreator, toDo);
if (NS_SUCCEEDED(rv)) {
groupFrame->GetStyleContext(getter_AddRefs(groupStyleContext));
if (contentDisplayIsRow) {
aPresContext->ResolveStyleContextFor(aContent, groupStyleContext,
PR_FALSE,
getter_AddRefs(styleContext));
} else {
aPresContext->ResolvePseudoStyleContextFor(aContent, nsHTMLAtoms::tableRowPseudo,
groupStyleContext,
PR_FALSE,
getter_AddRefs(styleContext));
}
rv = ConstructTableRowFrameOnly(aPresContext, aContent, groupFrame, styleContext,
aAbsoluteItems, contentDisplayIsRow, aNewRowFrame, aFixedItems, aTableCreator);
if (NS_SUCCEEDED(rv)) {
aNewRowFrame->Init(*aPresContext, aContent, groupFrame, styleContext);
if (aToDo) {
aToDo->Push(groupFrame);
aToDo->Push(aNewRowFrame);
} else {
groupFrame->SetInitialChildList(*aPresContext, nsnull, aNewRowFrame);
TableProcessChildLists(aPresContext, toDo);
delete toDo;
}
}
}
}
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructTableRowFrameOnly(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIStyleContext* aStyleContext,
nsAbsoluteItems& aAbsoluteItems,
PRBool aProcessChildren,
nsIFrame*& aNewRowFrame,
nsAbsoluteItems& aFixedItems,
nsTableCreator& aTableCreator)
{
nsresult rv = aTableCreator.CreateTableRowFrame(aNewRowFrame);
if (NS_SUCCEEDED(rv)) {
aNewRowFrame->Init(*aPresContext, aContent, aParentFrame, aStyleContext);
if (aProcessChildren) {
nsFrameItems childItems;
rv = TableProcessChildren(aPresContext, aContent, aNewRowFrame, aAbsoluteItems,
childItems, aFixedItems, aTableCreator);
if (NS_SUCCEEDED(rv)) {
aNewRowFrame->SetInitialChildList(*aPresContext, nsnull, childItems.childList);
}
}
}
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructTableColFrame(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIStyleContext* aStyleContext,
nsAbsoluteItems& aAbsoluteItems,
nsIFrame*& aNewTopMostFrame,
nsIFrame*& aNewColFrame,
nsAbsoluteItems& aFixedItems,
nsTableCreator& aTableCreator)
{
nsresult rv = NS_OK;
const nsStyleDisplay* parentDisplay = GetDisplay(aParentFrame);
if (NS_STYLE_DISPLAY_TABLE_COLUMN_GROUP == parentDisplay->mDisplay) {
rv = aTableCreator.CreateTableColFrame(aNewColFrame);
aNewColFrame->Init(*aPresContext, aContent, aParentFrame, aStyleContext);
aNewTopMostFrame = aNewColFrame;
} else { // construct anonymous col group frame
nsIFrame* groupFrame;
rv = ConstructTableGroupFrame(aPresContext, aContent, aParentFrame, aStyleContext,
aAbsoluteItems, PR_FALSE, aNewTopMostFrame,
groupFrame, aFixedItems, aTableCreator);
if (NS_SUCCEEDED(rv)) {
nsCOMPtr<nsIStyleContext> groupStyleContext;
groupFrame->GetStyleContext(getter_AddRefs(groupStyleContext));
nsCOMPtr<nsIStyleContext> styleContext;
aPresContext->ResolveStyleContextFor(aContent, groupStyleContext,
PR_FALSE,
getter_AddRefs(styleContext));
rv = aTableCreator.CreateTableColFrame(aNewColFrame);
aNewColFrame->Init(*aPresContext, aContent, groupFrame, styleContext);
if (NS_SUCCEEDED(rv)) {
groupFrame->SetInitialChildList(*aPresContext, nsnull, aNewColFrame);
}
}
}
if (NS_SUCCEEDED(rv)) {
nsFrameItems colChildItems;
rv = ProcessChildren(aPresContext, aContent, aNewColFrame, aAbsoluteItems,
colChildItems, aFixedItems);
if (NS_SUCCEEDED(rv)) {
aNewColFrame->SetInitialChildList(*aPresContext, nsnull, colChildItems.childList);
}
}
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructTableCellFrame(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIStyleContext* aStyleContext,
nsAbsoluteItems& aAbsoluteItems,
nsIFrame*& aNewTopMostFrame,
nsIFrame*& aNewCellFrame,
nsAbsoluteItems& aFixedItems,
nsTableCreator& aTableCreator)
{
nsresult rv = NS_OK;
const nsStyleDisplay* display = (const nsStyleDisplay*)
aStyleContext->GetStyleData(eStyleStruct_Display);
PRBool contentDisplayIsCell = (NS_STYLE_DISPLAY_TABLE_CELL == display->mDisplay);
nsCOMPtr<nsIStyleContext> parentStyleContext;
aParentFrame->GetStyleContext(getter_AddRefs(parentStyleContext));
const nsStyleDisplay* parentDisplay = (const nsStyleDisplay*)
parentStyleContext->GetStyleData(eStyleStruct_Display);
nsCOMPtr<nsIStyleContext> styleContext( dont_QueryInterface(aStyleContext) );
PRBool wrapContent = PR_FALSE;
if (NS_STYLE_DISPLAY_TABLE_ROW == parentDisplay->mDisplay) {
nsCOMPtr<nsIStyleContext> styleContextRelease;
if (!contentDisplayIsCell) {
aPresContext->ResolvePseudoStyleContextFor(aContent, nsHTMLAtoms::tableCellPseudo,
parentStyleContext,
PR_FALSE,
getter_AddRefs(styleContext));
wrapContent = PR_TRUE;
}
rv = ConstructTableCellFrameOnly(aPresContext, aContent, aParentFrame, styleContext,
wrapContent, aAbsoluteItems, aNewCellFrame, aFixedItems, aTableCreator);
aNewTopMostFrame = aNewCellFrame;
} else { // construct anonymous row frame
nsIFrame* rowFrame;
nsDeque toDo(*gBenignFunctor);
rv = ConstructTableRowFrame(aPresContext, aContent, aParentFrame, aStyleContext,
aAbsoluteItems, aNewTopMostFrame, rowFrame, aFixedItems, aTableCreator, &toDo);
if (NS_SUCCEEDED(rv)) {
nsCOMPtr<nsIStyleContext> rowStyleContext;
rowFrame->GetStyleContext(getter_AddRefs(rowStyleContext));
if (contentDisplayIsCell) {
aPresContext->ResolveStyleContextFor(aContent, rowStyleContext,
PR_FALSE,
getter_AddRefs(styleContext));
} else {
wrapContent = PR_TRUE;
aPresContext->ResolvePseudoStyleContextFor(aContent, nsHTMLAtoms::tableCellPseudo,
rowStyleContext, PR_FALSE,
getter_AddRefs(styleContext));
}
rv = ConstructTableCellFrameOnly(aPresContext, aContent, rowFrame, styleContext,
wrapContent, aAbsoluteItems, aNewCellFrame, aFixedItems, aTableCreator);
if (NS_SUCCEEDED(rv)) {
rowFrame->SetInitialChildList(*aPresContext, nsnull, aNewCellFrame);
TableProcessChildLists(aPresContext, &toDo);
}
}
}
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructTableCellFrameOnly(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIStyleContext* aStyleContext,
PRBool aWrapContent,
nsAbsoluteItems& aAbsoluteItems,
nsIFrame*& aNewFrame,
nsAbsoluteItems& aFixedItems,
nsTableCreator& aTableCreator)
{
nsresult rv;
// Create a table cell frame
rv = aTableCreator.CreateTableCellFrame(aNewFrame);
if (NS_SUCCEEDED(rv)) {
// Initialize the table cell frame
aNewFrame->Init(*aPresContext, aContent, aParentFrame, aStyleContext);
// Create an area frame that will format the cell's content
nsIFrame* cellBodyFrame;
rv = NS_NewAreaFrame(cellBodyFrame, 0);
if (NS_FAILED(rv)) {
aNewFrame->DeleteFrame(*aPresContext);
aNewFrame = nsnull;
return rv;
}
// Resolve pseudo style and initialize the body cell frame
nsCOMPtr<nsIStyleContext> bodyPseudoStyle;
aPresContext->ResolvePseudoStyleContextFor(aContent, nsHTMLAtoms::cellContentPseudo,
aStyleContext, PR_FALSE,
getter_AddRefs(bodyPseudoStyle));
cellBodyFrame->Init(*aPresContext, aContent, aNewFrame, bodyPseudoStyle);
nsFrameItems childItems;
if (aWrapContent) {
// construct a new frame for the content, which is not <TD> content
rv = ConstructFrame(aPresContext, aContent, cellBodyFrame, aAbsoluteItems, childItems, aFixedItems);
} else {
// Process children and set the body cell frame's initial child list
rv = ProcessChildren(aPresContext, aContent, cellBodyFrame, aAbsoluteItems,
childItems, aFixedItems);
}
if (NS_SUCCEEDED(rv)) {
cellBodyFrame->SetInitialChildList(*aPresContext, nsnull, childItems.childList);
// Set the table cell frame's initial child list
aNewFrame->SetInitialChildList(*aPresContext, nsnull, cellBodyFrame);
}
}
return rv;
}
// This is only called by table row groups and rows. It allows children that are not
// table related to have a cell wrapped around them.
nsresult
nsCSSFrameConstructor::TableProcessChildren(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsAbsoluteItems& aAbsoluteItems,
nsFrameItems& aChildItems,
nsAbsoluteItems& aFixedItems,
nsTableCreator& aTableCreator)
{
nsresult rv = NS_OK;
// Iterate the child content objects and construct a frame
PRInt32 count;
nsCOMPtr<nsIStyleContext> parentStyleContext;
aParentFrame->GetStyleContext(getter_AddRefs(parentStyleContext));
aContent->ChildCount(count);
for (PRInt32 i = 0; i < count; i++) {
nsCOMPtr<nsIContent> childContent;
aContent->ChildAt(i, *getter_AddRefs(childContent));
rv = TableProcessChild(aPresContext, childContent, aParentFrame, parentStyleContext,
aAbsoluteItems, aChildItems, aFixedItems, aTableCreator);
}
return rv;
}
nsresult
nsCSSFrameConstructor::TableProcessChild(nsIPresContext* aPresContext,
nsIContent* aChildContent,
nsIFrame* aParentFrame,
nsIStyleContext* aParentStyleContext,
nsAbsoluteItems& aAbsoluteItems,
nsFrameItems& aChildItems,
nsAbsoluteItems& aFixedItems,
nsTableCreator& aTableCreator)
{
nsresult rv = NS_OK;
if (nsnull != aChildContent) {
nsCOMPtr<nsIStyleContext> childStyleContext;
aPresContext->ResolveStyleContextFor(aChildContent, aParentStyleContext,
PR_FALSE,
getter_AddRefs(childStyleContext));
const nsStyleDisplay* childDisplay = (const nsStyleDisplay*)
childStyleContext->GetStyleData(eStyleStruct_Display);
if ( (childDisplay->mDisplay == NS_STYLE_DISPLAY_TABLE) ||
(childDisplay->mDisplay == NS_STYLE_DISPLAY_TABLE_HEADER_GROUP) ||
(childDisplay->mDisplay == NS_STYLE_DISPLAY_TABLE_ROW_GROUP) ||
(childDisplay->mDisplay == NS_STYLE_DISPLAY_TABLE_FOOTER_GROUP) ||
(childDisplay->mDisplay == NS_STYLE_DISPLAY_TABLE_ROW) ||
(childDisplay->mDisplay == NS_STYLE_DISPLAY_TABLE_COLUMN) ||
(childDisplay->mDisplay == NS_STYLE_DISPLAY_TABLE_CELL) ) {
rv = ConstructFrame(aPresContext, aChildContent, aParentFrame, aAbsoluteItems, aChildItems, aFixedItems);
} else {
nsCOMPtr<nsIAtom> tag;
aChildContent->GetTag(*getter_AddRefs(tag));
// forms need a frame but it can't be a child of an inner table
if (nsHTMLAtoms::form == tag.get()) {
// if the parent is a table, put the form in the outer table frame
const nsStyleDisplay* parentDisplay = (const nsStyleDisplay*)
aParentStyleContext->GetStyleData(eStyleStruct_Display);
if (parentDisplay->mDisplay == NS_STYLE_DISPLAY_TABLE) {
nsIFrame* outerFrame;
aParentFrame->GetParent(&outerFrame);
rv = ConstructFrame(aPresContext, aChildContent, outerFrame, aAbsoluteItems,
aChildItems, aFixedItems);
// XXX: Seems like this is going into the inner frame's child list instead of the outer frame. - DWH
} else {
rv = ConstructFrame(aPresContext, aChildContent, aParentFrame,
aAbsoluteItems, aChildItems, aFixedItems);
}
// wrap it in a table cell, row, row group, table if it is a valid tag or display
// and not whitespace. For example we don't allow map, head, body, etc.
} else {
if (TableIsValidCellContent(aPresContext, aParentFrame, aChildContent)) {
PRBool needCell = PR_TRUE;
nsIDOMCharacterData* domData = nsnull;
nsresult rv2 = aChildContent->QueryInterface(kIDOMCharacterDataIID, (void**)&domData);
if ((NS_OK == rv2) && (nsnull != domData)) {
nsString charData;
domData->GetData(charData);
charData = charData.StripWhitespace();
if ((charData.Length() <= 0) && (charData != " ")) { // XXX check this
needCell = PR_FALSE; // only contains whitespace, don't create cell
}
NS_RELEASE(domData);
}
if (needCell) {
nsIFrame* cellFrame;
nsIFrame* childFrame; // XXX: Need to change the ConstructTableCell function to return lists of frames. - DWH
rv = ConstructTableCellFrame(aPresContext, aChildContent, aParentFrame, childStyleContext,
aAbsoluteItems, childFrame, cellFrame, aFixedItems, aTableCreator);
aChildItems.AddChild(childFrame);
}
}
}
}
}
return rv;
}
PRBool
nsCSSFrameConstructor::TableIsValidCellContent(nsIPresContext* aPresContext,
nsIFrame* aParentFrame,
nsIContent* aContent)
{
nsCOMPtr<nsIAtom> tag;
aContent->GetTag(*getter_AddRefs(tag));
nsCOMPtr<nsIStyleContext> styleContext;
nsresult rv = ResolveStyleContext(aPresContext, aParentFrame, aContent, tag, getter_AddRefs(styleContext));
if (NS_FAILED(rv)) {
return PR_FALSE;
}
const nsStyleDisplay* display = (const nsStyleDisplay*)
styleContext->GetStyleData(eStyleStruct_Display);
if (NS_STYLE_DISPLAY_NONE != display->mDisplay) {
return PR_FALSE;
}
// check tags first
if ( (nsHTMLAtoms::img == tag.get()) ||
(nsHTMLAtoms::hr == tag.get()) ||
(nsHTMLAtoms::br == tag.get()) ||
(nsHTMLAtoms::wbr == tag.get()) ||
(nsHTMLAtoms::input == tag.get()) ||
(nsHTMLAtoms::textarea == tag.get()) ||
(nsHTMLAtoms::select == tag.get()) ||
(nsHTMLAtoms::applet == tag.get()) ||
(nsHTMLAtoms::embed == tag.get()) ||
(nsHTMLAtoms::fieldset == tag.get()) ||
(nsHTMLAtoms::legend == tag.get()) ||
(nsHTMLAtoms::object == tag.get()) ||
(nsHTMLAtoms::form == tag.get()) ||
(nsHTMLAtoms::iframe == tag.get()) ||
(nsHTMLAtoms::spacer == tag.get()) ||
(nsHTMLAtoms::button == tag.get()) ||
(nsHTMLAtoms::label == tag.get() )) {
return PR_TRUE;
}
#ifdef INCLUDE_XUL
if ( (nsXULAtoms::button == tag.get()) ||
(nsXULAtoms::titledbutton == tag.get()) ||
(nsXULAtoms::checkbox == tag.get()) ||
(nsXULAtoms::radio == tag.get()) ||
(nsXULAtoms::text == tag.get()) ||
(nsXULAtoms::widget == tag.get()) ||
(nsXULAtoms::tree == tag.get()) ||
(nsXULAtoms::treechildren == tag.get()) ||
(nsXULAtoms::treeitem == tag.get()) ||
(nsXULAtoms::treecell == tag.get()) ||
(nsXULAtoms::treeindentation == tag.get()) ||
(nsXULAtoms::toolbox == tag.get()) ||
(nsXULAtoms::toolbar == tag.get()) ||
(nsXULAtoms::progressmeter == tag.get() )) {
return PR_TRUE;
}
#endif
// we should check for display type as well - later
return PR_FALSE;
}
nsresult
nsCSSFrameConstructor::TableProcessChildLists(nsIPresContext* aPresContext,
nsDeque* aParentChildPairs)
{
if (aParentChildPairs) {
nsIFrame* child;
nsIFrame* parent = (nsIFrame*)aParentChildPairs->PopFront();
while (nsnull != parent) {
child = (nsIFrame*)aParentChildPairs->PopFront();
parent->SetInitialChildList(*aPresContext, nsnull, child);
parent = (nsIFrame*)aParentChildPairs->PopFront();
}
}
return NS_OK;
}
nsIFrame*
nsCSSFrameConstructor::TableGetAsNonScrollFrame(nsIPresContext* aPresContext,
nsIFrame* aFrame,
const nsStyleDisplay* aDisplay)
{
if (nsnull == aFrame) {
return nsnull;
}
nsIFrame* result = aFrame;
if (IsScrollable(aPresContext, aDisplay)) {
aFrame->FirstChild(nsnull, &result);
}
return result;
}
// nsIAtom* pseudoTag;
// styleContext->GetPseudoType(pseudoTag);
// if (pseudoTag != nsHTMLAtoms::scrolledContentPseudo) {
// NS_IF_RELEASE(pseudoTag);
const nsStyleDisplay*
nsCSSFrameConstructor:: GetDisplay(nsIFrame* aFrame)
{
if (nsnull == aFrame) {
return nsnull;
}
nsCOMPtr<nsIStyleContext> styleContext;
aFrame->GetStyleContext(getter_AddRefs(styleContext));
const nsStyleDisplay* display =
(const nsStyleDisplay*)styleContext->GetStyleData(eStyleStruct_Display);
return display;
}
/***********************************************
* END TABLE SECTION
***********************************************/
nsresult
nsCSSFrameConstructor::ConstructDocElementFrame(nsIPresContext* aPresContext,
nsIContent* aDocElement,
nsIFrame* aParentFrame,
nsIStyleContext* aParentStyleContext,
nsIFrame*& aNewFrame,
nsAbsoluteItems& aFixedItems)
{
// Resolve the style context for the document element
nsCOMPtr<nsIStyleContext> styleContext;
aPresContext->ResolveStyleContextFor(aDocElement, aParentStyleContext,
PR_FALSE,
getter_AddRefs(styleContext));
// See if we're paginated
PRBool isPaginated;
aPresContext->IsPaginated(&isPaginated);
if (isPaginated) {
// Create an area frame for the document element
nsIFrame* areaFrame;
NS_NewAreaFrame(areaFrame, 0);
areaFrame->Init(*aPresContext, aDocElement, aParentFrame, styleContext);
// The area frame is the "initial containing block"
mInitialContainingBlock = areaFrame;
// Process the child content
nsAbsoluteItems absoluteItems(areaFrame);
nsFrameItems childItems;
ProcessChildren(aPresContext, aDocElement, areaFrame, absoluteItems, childItems,
aFixedItems);
// Set the initial child lists
areaFrame->SetInitialChildList(*aPresContext, nsnull, childItems.childList);
if (nsnull != absoluteItems.childList) {
areaFrame->SetInitialChildList(*aPresContext, nsLayoutAtoms::absoluteList,
absoluteItems.childList);
}
// Return the area frame
aNewFrame = areaFrame;
} else {
// Unless the 'overflow' policy forbids scrolling, wrap the frame in a
// scroll frame.
nsIFrame* scrollFrame = nsnull;
const nsStyleDisplay* display = (const nsStyleDisplay*)
styleContext->GetStyleData(eStyleStruct_Display);
if (IsScrollable(aPresContext, display)) {
NS_NewScrollFrame(scrollFrame);
scrollFrame->Init(*aPresContext, aDocElement, aParentFrame, styleContext);
// The scrolled frame gets a pseudo element style context
nsCOMPtr<nsIStyleContext> scrolledPseudoStyle;
aPresContext->ResolvePseudoStyleContextFor(nsnull,
nsHTMLAtoms::scrolledContentPseudo,
styleContext,
PR_FALSE,
getter_AddRefs(scrolledPseudoStyle));
styleContext = scrolledPseudoStyle;
}
// Create an area frame for the document element. This serves as the
// "initial containing block"
nsIFrame* areaFrame;
// XXX Until we clean up how painting damage is handled, we need to use the
// flag that says that this is the body...
NS_NewAreaFrame(areaFrame, NS_BLOCK_DOCUMENT_ROOT|NS_BLOCK_MARGIN_ROOT);
areaFrame->Init(*aPresContext, aDocElement, scrollFrame ? scrollFrame :
aParentFrame, styleContext);
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, areaFrame,
styleContext, PR_FALSE);
// The area frame is the "initial containing block"
mInitialContainingBlock = areaFrame;
// Process the child content
nsAbsoluteItems absoluteItems(areaFrame);
nsFrameItems childItems;
ProcessChildren(aPresContext, aDocElement, areaFrame, absoluteItems, childItems,
aFixedItems);
// Set the initial child lists
areaFrame->SetInitialChildList(*aPresContext, nsnull, childItems.childList);
if (nsnull != absoluteItems.childList) {
areaFrame->SetInitialChildList(*aPresContext, nsLayoutAtoms::absoluteList,
absoluteItems.childList);
}
if (nsnull != scrollFrame) {
scrollFrame->SetInitialChildList(*aPresContext, nsnull, areaFrame);
}
aNewFrame = scrollFrame ? scrollFrame : areaFrame;
}
return NS_OK;
}
NS_IMETHODIMP
nsCSSFrameConstructor::ConstructRootFrame(nsIPresContext* aPresContext,
nsIContent* aDocElement,
nsIFrame*& aNewFrame)
{
#ifdef NS_DEBUG
nsCOMPtr<nsIDocument> doc;
nsIContent* rootContent;
// Verify that the content object is really the root content object
aDocElement->GetDocument(*getter_AddRefs(doc));
rootContent = doc->GetRootContent();
NS_ASSERTION(rootContent == aDocElement, "unexpected content");
NS_RELEASE(rootContent);
#endif
nsIFrame* viewportFrame;
nsCOMPtr<nsIStyleContext> viewportPseudoStyle;
// Create the viewport frame
NS_NewViewportFrame(viewportFrame);
// Create a pseudo element style context
aPresContext->ResolvePseudoStyleContextFor(nsnull, nsLayoutAtoms::viewportPseudo,
nsnull, PR_FALSE,
getter_AddRefs(viewportPseudoStyle));
// Initialize the viewport frame. It has a NULL content object
viewportFrame->Init(*aPresContext, nsnull, nsnull, viewportPseudoStyle);
// Bind the viewport frame to the root view
nsCOMPtr<nsIPresShell> presShell;
aPresContext->GetShell(getter_AddRefs(presShell));
nsCOMPtr<nsIViewManager> viewManager;
presShell->GetViewManager(getter_AddRefs(viewManager));
nsIView* rootView;
viewManager->GetRootView(rootView);
viewportFrame->SetView(rootView);
// As long as the webshell doesn't prohibit it, create a scroll frame
// that will act as the scolling mechanism for the viewport
// XXX We should only do this when presenting to the screen, i.e., for galley
// mode and print-preview, but not when printing
PRBool isScrollable = PR_TRUE;
nsISupports* container;
if (nsnull != aPresContext) {
aPresContext->GetContainer(&container);
if (nsnull != container) {
nsIWebShell* webShell = nsnull;
container->QueryInterface(kIWebShellIID, (void**) &webShell);
if (nsnull != webShell) {
PRInt32 scrolling = -1;
webShell->GetScrolling(scrolling);
if (NS_STYLE_OVERFLOW_HIDDEN == scrolling) {
isScrollable = PR_FALSE;
}
NS_RELEASE(webShell);
}
NS_RELEASE(container);
}
}
// If the viewport should offer a scrolling mechanism, then create a
// scroll frame
nsIFrame* scrollFrame;
if (isScrollable) {
NS_NewScrollFrame(scrollFrame);
// XXX should probably be a scrolled content pseudo style context
scrollFrame->Init(*aPresContext, nsnull, viewportFrame, viewportPseudoStyle);
// Inform the view manager about the root scrollable view
nsIView* scrollFrameView;
nsIScrollableView* scrollingView;
scrollFrame->GetView(&scrollFrameView);
NS_ASSERTION(scrollFrameView, "scroll frame has no view");
scrollFrameView->QueryInterface(kScrollViewIID, (void**)&scrollingView);
viewManager->SetRootScrollableView(scrollingView);
}
PRBool isPaginated;
aPresContext->IsPaginated(&isPaginated);
if (isPaginated) {
nsIFrame* pageSequenceFrame;
// Create a page sequence frame
NS_NewSimplePageSequenceFrame(pageSequenceFrame);
// XXX should probably be a page sequence pseudo style context
pageSequenceFrame->Init(*aPresContext, nsnull, isScrollable ? scrollFrame :
viewportFrame, viewportPseudoStyle);
if (isScrollable) {
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, pageSequenceFrame,
viewportPseudoStyle, PR_TRUE);
}
// Create the first page
nsIFrame* pageFrame;
NS_NewPageFrame(pageFrame);
// The page is the containing block for 'fixed' elements. which are repeated
// on every page
mFixedContainingBlock = pageFrame;
// Initialize the page and force it to have a view. This makes printing of
// the pages easier and faster.
// XXX Use a PAGE style context...
nsCOMPtr<nsIStyleContext> pagePseudoStyle;
aPresContext->ResolvePseudoStyleContextFor(nsnull, nsLayoutAtoms::pagePseudo,
viewportPseudoStyle, PR_FALSE,
getter_AddRefs(pagePseudoStyle));
pageFrame->Init(*aPresContext, nsnull, pageSequenceFrame, pagePseudoStyle);
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, pageFrame,
pagePseudoStyle, PR_TRUE);
// The eventual parent of the document element frame
mDocElementContainingBlock = pageFrame;
// Set the initial child lists
pageSequenceFrame->SetInitialChildList(*aPresContext, nsnull, pageFrame);
if (isScrollable) {
scrollFrame->SetInitialChildList(*aPresContext, nsnull, pageSequenceFrame);
viewportFrame->SetInitialChildList(*aPresContext, nsnull, scrollFrame);
} else {
viewportFrame->SetInitialChildList(*aPresContext, nsnull, pageSequenceFrame);
}
} else {
// The viewport is the containing block for 'fixed' elements
mFixedContainingBlock = viewportFrame;
// Create the root frame. The document element's frame is a child of the
// root frame.
//
// Note: the major reason we need the root frame is to implement margins for
// the document element's frame. If we didn't need to support margins on the
// document element's frame, then we could eliminate the root frame and make
// the document element frame a child of the viewport (or its scroll frame)
nsIFrame* rootFrame;
NS_NewRootFrame(rootFrame);
// XXX this should be a root pseudo style context
rootFrame->Init(*aPresContext, nsnull, isScrollable ? scrollFrame :
viewportFrame, viewportPseudoStyle);
if (isScrollable) {
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, rootFrame,
viewportPseudoStyle, PR_TRUE);
}
// The eventual parent of the document element frame
mDocElementContainingBlock = rootFrame;
// Set the initial child lists
if (isScrollable) {
scrollFrame->SetInitialChildList(*aPresContext, nsnull, rootFrame);
viewportFrame->SetInitialChildList(*aPresContext, nsnull, scrollFrame);
} else {
viewportFrame->SetInitialChildList(*aPresContext, nsnull, rootFrame);
}
}
aNewFrame = viewportFrame;
return NS_OK;
}
nsresult
nsCSSFrameConstructor::CreatePlaceholderFrameFor(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aFrame,
nsIStyleContext* aStyleContext,
nsIFrame* aParentFrame,
nsIFrame*& aPlaceholderFrame)
{
nsIFrame* placeholderFrame;
nsresult rv;
rv = NS_NewEmptyFrame(&placeholderFrame);
if (NS_SUCCEEDED(rv)) {
// The placeholder frame gets a pseudo style context
nsCOMPtr<nsIStyleContext> placeholderPseudoStyle;
aPresContext->ResolvePseudoStyleContextFor(aContent, nsHTMLAtoms::placeholderPseudo,
aStyleContext,
PR_FALSE,
getter_AddRefs(placeholderPseudoStyle));
placeholderFrame->Init(*aPresContext, aContent, aParentFrame,
placeholderPseudoStyle);
// Add mapping from absolutely positioned frame to its placeholder frame
nsCOMPtr<nsIPresShell> presShell;
aPresContext->GetShell(getter_AddRefs(presShell));
presShell->SetPlaceholderFrameFor(aFrame, placeholderFrame);
aPlaceholderFrame = placeholderFrame;
}
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructSelectFrame(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIAtom* aTag,
nsIStyleContext* aStyleContext,
nsAbsoluteItems& aAbsoluteItems,
nsIFrame*& aNewFrame,
PRBool & aProcessChildren,
PRBool & aIsAbsolutelyPositioned,
PRBool & aFrameHasBeenInitialized)
{
#ifdef FRAMEBASED_COMPONENTS
nsresult rv = NS_OK;
nsIDOMHTMLSelectElement* select = nsnull;
PRBool multiple = PR_FALSE;
nsresult result = aContent->QueryInterface(kIDOMHTMLSelectElementIID, (void**)&select);
if (NS_OK == result) {
result = select->GetMultiple(&multiple); // XXX This is wrong!
if (!multiple) {
nsIFrame * comboboxFrame;
rv = NS_NewComboboxControlFrame(comboboxFrame);
nsIComboboxControlFrame* comboBox;
if (NS_OK == comboboxFrame->QueryInterface(kIComboboxControlFrameIID, (void**)&comboBox)) {
nsIFrame * listFrame;
rv = NS_NewListControlFrame(listFrame);
// This is important to do before it is initialized
// it tells it that it is in "DropDown Mode"
nsIListControlFrame * listControlFrame;
if (NS_OK == listFrame->QueryInterface(kIListControlFrameIID, (void**)&listControlFrame)) {
listControlFrame->SetComboboxFrame(comboboxFrame);
}
InitializeScrollFrame(listFrame, aPresContext, aContent, comboboxFrame, aStyleContext,
aAbsoluteItems, aNewFrame, PR_TRUE, PR_TRUE);
nsIFrame* placeholderFrame;
CreatePlaceholderFrameFor(aPresContext, aContent, aNewFrame, aStyleContext,
aParentFrame, placeholderFrame);
// Add the absolutely positioned frame to its containing block's list
// of child frames
aAbsoluteItems.AddChild(aNewFrame);
listFrame = aNewFrame;
// This needs to be done "after" the ListFrame has it's ChildList set
// because the SetInitChildList intializes the ListBox selection state
// and this method initializes the ComboBox's selection state
comboBox->SetDropDown(placeholderFrame, listFrame);
// Set up the Pseudo Style contents
nsIStyleContext* visiblePseudoStyle = aPresContext->ResolvePseudoStyleContextFor
(aContent, nsHTMLAtoms::dropDownVisible, aStyleContext);
nsIStyleContext* hiddenPseudoStyle = aPresContext->ResolvePseudoStyleContextFor
(aContent, nsHTMLAtoms::dropDownHidden, aStyleContext);
nsIStyleContext* outPseudoStyle = aPresContext->ResolvePseudoStyleContextFor
(aContent, nsHTMLAtoms::dropDownBtnOut, aStyleContext);
nsIStyleContext* pressPseudoStyle = aPresContext->ResolvePseudoStyleContextFor
(aContent, nsHTMLAtoms::dropDownBtnPressed, aStyleContext);
comboBox->SetDropDownStyleContexts(visiblePseudoStyle, hiddenPseudoStyle);
comboBox->SetButtonStyleContexts(outPseudoStyle, pressPseudoStyle);
aProcessChildren = PR_FALSE;
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, listFrame,
aStyleContext, PR_TRUE);
aNewFrame = comboboxFrame;
}
} else {
nsIFrame * listFrame;
rv = NS_NewListControlFrame(listFrame);
aNewFrame = listFrame;
InitializeScrollFrame(listFrame, aPresContext, aContent, aParentFrame, aStyleContext,
aAbsoluteItems, aNewFrame, aIsAbsolutelyPositioned, PR_TRUE);
aFrameHasBeenInitialized = PR_TRUE;
}
NS_RELEASE(select);
} else {
rv = NS_NewSelectControlFrame(aNewFrame);
}
#else
nsresult rv = NS_NewSelectControlFrame(aNewFrame);
#endif
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructFrameByTag(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIAtom* aTag,
nsIStyleContext* aStyleContext,
nsAbsoluteItems& aAbsoluteItems,
nsFrameItems& aFrameItems,
nsAbsoluteItems& aFixedItems)
{
PRBool processChildren = PR_FALSE; // whether we should process child content
PRBool isAbsolutelyPositioned = PR_FALSE;
PRBool isFixedPositioned = PR_FALSE;
PRBool canBePositioned = PR_TRUE;
PRBool frameHasBeenInitialized = PR_FALSE;
nsIFrame* newFrame = nsnull; // the frame we construct
PRBool isReplaced = PR_FALSE;
nsresult rv = NS_OK;
if (nsLayoutAtoms::textTagName == aTag) {
rv = NS_NewTextFrame(newFrame);
isReplaced = PR_TRUE; // XXX kipp: temporary?
}
else {
nsIHTMLContent *htmlContent;
// Ignore the tag if it's not HTML content
if (NS_SUCCEEDED(aContent->QueryInterface(kIHTMLContentIID, (void **)&htmlContent))) {
NS_RELEASE(htmlContent);
// See if the element is absolute or fixed positioned
const nsStylePosition* position = (const nsStylePosition*)
aStyleContext->GetStyleData(eStyleStruct_Position);
if (NS_STYLE_POSITION_ABSOLUTE == position->mPosition) {
isAbsolutelyPositioned = PR_TRUE;
}
if (NS_STYLE_POSITION_FIXED == position->mPosition) {
isFixedPositioned = PR_TRUE;
}
// Create a frame based on the tag
if (nsHTMLAtoms::img == aTag) {
isReplaced = PR_TRUE;
// XXX If image display is turned off, then use ConstructAlternateImageFrame()
// instead...
rv = NS_NewImageFrame(newFrame);
}
else if (nsHTMLAtoms::hr == aTag) {
rv = NS_NewHRFrame(newFrame);
}
else if (nsHTMLAtoms::br == aTag) {
rv = NS_NewBRFrame(newFrame);
isReplaced = PR_TRUE; // XXX kipp: temporary?
}
else if (nsHTMLAtoms::wbr == aTag) {
rv = NS_NewWBRFrame(newFrame);
}
else if (nsHTMLAtoms::input == aTag) {
isReplaced = PR_TRUE;
rv = CreateInputFrame(aContent, newFrame);
}
else if (nsHTMLAtoms::textarea == aTag) {
isReplaced = PR_TRUE;
rv = NS_NewTextControlFrame(newFrame);
}
else if (nsHTMLAtoms::select == aTag) {
isReplaced = PR_TRUE;
rv = ConstructSelectFrame(aPresContext, aContent, aParentFrame,
aTag, aStyleContext, aAbsoluteItems, newFrame,
processChildren, isAbsolutelyPositioned, frameHasBeenInitialized);
}
else if (nsHTMLAtoms::applet == aTag) {
isReplaced = PR_TRUE;
rv = NS_NewObjectFrame(newFrame);
}
else if (nsHTMLAtoms::embed == aTag) {
rv = NS_NewObjectFrame(newFrame);
}
else if (nsHTMLAtoms::fieldset == aTag) {
rv = NS_NewFieldSetFrame(newFrame);
processChildren = PR_TRUE;
}
else if (nsHTMLAtoms::legend == aTag) {
rv = NS_NewLegendFrame(newFrame);
processChildren = PR_TRUE;
canBePositioned = PR_FALSE;
}
else if (nsHTMLAtoms::object == aTag) {
isReplaced = PR_TRUE;
rv = NS_NewObjectFrame(newFrame);
nsIFrame *blockFrame;
NS_NewBlockFrame(blockFrame, 0);
blockFrame->Init(*aPresContext, aContent, newFrame, aStyleContext);
newFrame = blockFrame;
processChildren = PR_TRUE;
}
else if (nsHTMLAtoms::form == aTag) {
rv = NS_NewFormFrame(newFrame);
}
else if (nsHTMLAtoms::frameset == aTag) {
rv = NS_NewHTMLFramesetFrame(newFrame);
canBePositioned = PR_FALSE;
}
else if (nsHTMLAtoms::iframe == aTag) {
isReplaced = PR_TRUE;
rv = NS_NewHTMLFrameOuterFrame(newFrame);
}
else if (nsHTMLAtoms::spacer == aTag) {
rv = NS_NewSpacerFrame(newFrame);
canBePositioned = PR_FALSE;
}
else if (nsHTMLAtoms::button == aTag) {
rv = NS_NewHTMLButtonControlFrame(newFrame);
processChildren = PR_TRUE;
}
else if (nsHTMLAtoms::label == aTag) {
rv = NS_NewLabelFrame(newFrame);
processChildren = PR_TRUE;
}
}
}
// If we succeeded in creating a frame then initialize it, process its
// children (if requested), and set the initial child list
if (NS_SUCCEEDED(rv) && (nsnull != newFrame)) {
// If the frame is a replaced element, then set the frame state bit
if (isReplaced) {
nsFrameState state;
newFrame->GetFrameState(&state);
newFrame->SetFrameState(state | NS_FRAME_REPLACED_ELEMENT);
}
if (!frameHasBeenInitialized) {
nsIFrame* geometricParent = aParentFrame;
if (canBePositioned) {
if (isAbsolutelyPositioned) {
geometricParent = aAbsoluteItems.containingBlock;
} else if (isFixedPositioned) {
geometricParent = aFixedItems.containingBlock;
}
}
newFrame->Init(*aPresContext, aContent, geometricParent, aStyleContext);
// See if we need to create a view, e.g. the frame is absolutely positioned
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, newFrame,
aStyleContext, PR_FALSE);
// Process the child content if requested
nsFrameItems childItems;
if (processChildren) {
rv = ProcessChildren(aPresContext, aContent, newFrame, aAbsoluteItems,
childItems, aFixedItems);
}
// Set the frame's initial child list
newFrame->SetInitialChildList(*aPresContext, nsnull, childItems.childList);
}
// If the frame is positioned then create a placeholder frame
if (isAbsolutelyPositioned || isFixedPositioned) {
nsIFrame* placeholderFrame;
CreatePlaceholderFrameFor(aPresContext, aContent, newFrame, aStyleContext,
aParentFrame, placeholderFrame);
// Add the positioned frame to its containing block's list of child frames
if (isAbsolutelyPositioned) {
aAbsoluteItems.AddChild(newFrame);
} else {
aFixedItems.AddChild(newFrame);
}
// Add the placeholder frame to the flow
aFrameItems.AddChild(placeholderFrame);
} else {
// Add the newly constructed frame to the flow
aFrameItems.AddChild(newFrame);
}
}
return rv;
}
#ifdef INCLUDE_XUL
nsresult
nsCSSFrameConstructor::ConstructXULFrame(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIAtom* aTag,
nsIStyleContext* aStyleContext,
nsAbsoluteItems& aAbsoluteItems,
nsFrameItems& aFrameItems,
nsAbsoluteItems& aFixedItems,
PRBool& haltProcessing)
{
PRBool processChildren = PR_FALSE; // whether we should process child content
nsresult rv = NS_OK;
PRBool isAbsolutelyPositioned = PR_FALSE;
PRBool isFixedPositioned = PR_FALSE;
// Initialize the new frame
nsIFrame* newFrame = nsnull;
nsIFrame* ignore = nsnull; // I have no idea what this is used for.
nsTreeCreator treeCreator; // Used to make tree views.
NS_ASSERTION(aTag != nsnull, "null XUL tag");
if (aTag == nsnull)
return NS_OK;
PRInt32 nameSpaceID;
if (NS_SUCCEEDED(aContent->GetNameSpaceID(nameSpaceID)) &&
nameSpaceID == nsXULAtoms::nameSpaceID) {
// See if the element is absolutely positioned
const nsStylePosition* position = (const nsStylePosition*)
aStyleContext->GetStyleData(eStyleStruct_Position);
if (NS_STYLE_POSITION_ABSOLUTE == position->mPosition)
isAbsolutelyPositioned = PR_TRUE;
// Create a frame based on the tag
if (aTag == nsXULAtoms::button)
rv = NS_NewButtonControlFrame(newFrame);
else if (aTag == nsXULAtoms::checkbox)
rv = NS_NewCheckboxControlFrame(newFrame);
else if (aTag == nsXULAtoms::radio)
rv = NS_NewRadioControlFrame(newFrame);
else if (aTag == nsXULAtoms::text)
rv = NS_NewTextControlFrame(newFrame);
else if (aTag == nsXULAtoms::widget)
rv = NS_NewObjectFrame(newFrame);
// TREE CONSTRUCTION
// The following code is used to construct a tree view from the XUL content
// model. It has to take the hierarchical tree content structure and build a flattened
// table row frame structure.
else if (aTag == nsXULAtoms::tree)
{
nsIFrame* geometricParent = aParentFrame;
if (NS_STYLE_POSITION_ABSOLUTE == position->mPosition) {
isAbsolutelyPositioned = PR_TRUE;
aParentFrame = aAbsoluteItems.containingBlock;
}
if (NS_STYLE_POSITION_FIXED == position->mPosition) {
isFixedPositioned = PR_TRUE;
aParentFrame = aFixedItems.containingBlock;
}
rv = ConstructTableFrame(aPresContext, aContent, geometricParent, aStyleContext,
aAbsoluteItems, newFrame, aFixedItems, treeCreator);
// Note: table construction function takes care of initializing the frame,
// processing children, and setting the initial child list
if (isAbsolutelyPositioned || isFixedPositioned) {
nsIFrame* placeholderFrame;
CreatePlaceholderFrameFor(aPresContext, aContent, newFrame, aStyleContext,
aParentFrame, placeholderFrame);
// Add the positioned frame to its containing block's list of child frames
if (isAbsolutelyPositioned) {
aAbsoluteItems.AddChild(newFrame);
} else {
aFixedItems.AddChild(newFrame);
}
// Add the placeholder frame to the flow
aFrameItems.AddChild(placeholderFrame);
} else {
// Add the table frame to the flow
aFrameItems.AddChild(newFrame);
}
return rv;
}
else if (aTag == nsXULAtoms::treechildren)
{
haltProcessing = PR_TRUE;
return rv; // This is actually handled by the treeitem node.
}
else if (aTag == nsXULAtoms::treeitem)
{
// A tree item causes a table row to be constructed that is always
// slaved to the nearest enclosing table row group (regardless of how
// deeply nested it is within other tree items).
rv = ConstructTableRowFrame(aPresContext, aContent, aParentFrame, aStyleContext,
aAbsoluteItems, newFrame, ignore, aFixedItems, treeCreator);
aFrameItems.AddChild(newFrame);
// We need to find the treechildren node that is a child of this node
// and we need to construct new rows.
PRInt32 aChildCount;
aContent->ChildCount(aChildCount);
for (PRInt32 i = 0; i < aChildCount; i++)
{
nsCOMPtr<nsIContent> childContent;
if (NS_SUCCEEDED(aContent->ChildAt(i, *getter_AddRefs(childContent))))
{
// Construct a child frame
nsCOMPtr<nsIAtom> pTag;
childContent->GetTag(*getter_AddRefs(pTag));
if (pTag.get() == nsXULAtoms::treechildren)
{
// We want to call ConstructFrame to keep building rows, but only if we're
// open.
nsString attrValue;
nsIAtom* kOpenAtom = NS_NewAtom("open");
nsresult result = aContent->GetAttribute(nsXULAtoms::nameSpaceID, kOpenAtom, attrValue);
attrValue.ToLowerCase();
processChildren = (result == NS_CONTENT_ATTR_NO_VALUE ||
(result == NS_CONTENT_ATTR_HAS_VALUE && attrValue=="true"));
NS_RELEASE(kOpenAtom);
// If we do need to process, we have to "skip" this content node, since it
// doesn't really have any associated display.
if (processChildren)
{
rv = ProcessChildren(aPresContext, childContent, aParentFrame, aAbsoluteItems,
aFrameItems, aFixedItems);
}
}
}
}
return rv;
// Note: See later in this method. More processing has to be done after the
// tree item has constructed its children and after this frame has been added
// to our list.
}
else if (aTag == nsXULAtoms::treecell)
{
// We make a tree cell frame and process the children.
// Find out what the attribute value for event allowance is.
nsString attrValue;
nsresult result = aContent->GetAttribute(nsXULAtoms::nameSpaceID, nsXULAtoms::treeallowevents, attrValue);
attrValue.ToLowerCase();
PRBool allowEvents = (result == NS_CONTENT_ATTR_NO_VALUE ||
(result == NS_CONTENT_ATTR_HAS_VALUE && attrValue=="true"));
rv = ConstructTableCellFrame(aPresContext, aContent, aParentFrame, aStyleContext,
aAbsoluteItems, newFrame, ignore, aFixedItems, treeCreator);
aFrameItems.AddChild(newFrame);
((nsTreeCellFrame*)newFrame)->SetAllowEvents(allowEvents);
return rv;
}
else if (aTag == nsXULAtoms::treeindentation)
{
rv = NS_NewTreeIndentationFrame(newFrame);
}
// End of TREE CONSTRUCTION code here (there's more later on in the function)
// TOOLBAR CONSTRUCTION
else if (aTag == nsXULAtoms::toolbox) {
processChildren = PR_TRUE;
rv = NS_NewToolboxFrame(newFrame);
}
else if (aTag == nsXULAtoms::toolbar) {
processChildren = PR_TRUE;
rv = NS_NewToolbarFrame(newFrame);
}
// End of TOOLBAR CONSTRUCTION logic
// PROGRESS METER CONSTRUCTION
else if (aTag == nsXULAtoms::progressmeter) {
processChildren = PR_TRUE;
rv = NS_NewProgressMeterFrame(newFrame);
}
// End of PROGRESS METER CONSTRUCTION logic
// TITLED BUTTON CONSTRUCTION
else if (aTag == nsXULAtoms::titledbutton) {
processChildren = PR_TRUE;
rv = NS_NewTitledButtonFrame(newFrame);
}
// End of TITLED BUTTON CONSTRUCTION logic
}
// If we succeeded in creating a frame then initialize it, process its
// children (if requested), and set the initial child list
if (NS_SUCCEEDED(rv) && newFrame != nsnull) {
nsIFrame* geometricParent = isAbsolutelyPositioned ? aAbsoluteItems.containingBlock :
aParentFrame;
newFrame->Init(*aPresContext, aContent, geometricParent, aStyleContext);
// See if we need to create a view, e.g. the frame is absolutely positioned
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, newFrame,
aStyleContext, PR_FALSE);
// Add the new frame to our list of frame items.
aFrameItems.AddChild(newFrame);
// Process the child content if requested
nsFrameItems childItems;
if (processChildren)
rv = ProcessChildren(aPresContext, aContent, newFrame, aAbsoluteItems,
childItems, aFixedItems);
// Set the frame's initial child list
newFrame->SetInitialChildList(*aPresContext, nsnull, childItems.childList);
// If the frame is absolutely positioned then create a placeholder frame
if (isAbsolutelyPositioned || isFixedPositioned) {
nsIFrame* placeholderFrame;
CreatePlaceholderFrameFor(aPresContext, aContent, newFrame, aStyleContext,
aParentFrame, placeholderFrame);
// Add the positioned frame to its containing block's list of child frames
if (isAbsolutelyPositioned) {
aAbsoluteItems.AddChild(newFrame);
} else {
aFixedItems.AddChild(newFrame);
}
// Add the placeholder frame to the flow
aFrameItems.AddChild(placeholderFrame);
}
}
return rv;
}
#endif
nsresult
nsCSSFrameConstructor::InitializeScrollFrame(nsIFrame* scrollFrame,
nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIStyleContext* aStyleContext,
nsAbsoluteItems& aAbsoluteItems,
nsIFrame*& aNewFrame,
nsAbsoluteItems& aFixedItems,
PRBool aIsAbsolutelyPositioned,
PRBool aIsFixedPositioned,
PRBool aCreateBlock)
{
// Initialize it
nsIFrame* geometricParent = aParentFrame;
if (aIsAbsolutelyPositioned) {
geometricParent = aAbsoluteItems.containingBlock;
} else if (aIsFixedPositioned) {
geometricParent = aFixedItems.containingBlock;
}
scrollFrame->Init(*aPresContext, aContent, geometricParent, aStyleContext);
// The scroll frame gets the original style context, and the scrolled
// frame gets a SCROLLED-CONTENT pseudo element style context that
// inherits the background properties
nsCOMPtr<nsIStyleContext> scrolledPseudoStyle;
aPresContext->ResolvePseudoStyleContextFor(aContent, nsHTMLAtoms::scrolledContentPseudo,
aStyleContext, PR_FALSE,
getter_AddRefs(scrolledPseudoStyle));
// Create an area container for the frame
nsIFrame* scrolledFrame;
NS_NewAreaFrame(scrolledFrame, NS_BLOCK_SHRINK_WRAP);
// Initialize the frame and force it to have a view
scrolledFrame->Init(*aPresContext, aContent, scrollFrame, scrolledPseudoStyle);
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, scrolledFrame,
scrolledPseudoStyle, PR_TRUE);
// Process children
if (aIsAbsolutelyPositioned | aIsFixedPositioned) {
// The area frame becomes a container for child frames that are
// absolutely positioned
nsAbsoluteItems absoluteItems(scrolledFrame);
nsFrameItems childItems;
ProcessChildren(aPresContext, aContent, scrolledFrame, absoluteItems,
childItems, aFixedItems);
// Set the initial child lists
scrolledFrame->SetInitialChildList(*aPresContext, nsnull, childItems.childList);
if (nsnull != absoluteItems.childList) {
scrolledFrame->SetInitialChildList(*aPresContext, nsLayoutAtoms::absoluteList,
absoluteItems.childList);
}
} else {
nsFrameItems childItems;
ProcessChildren(aPresContext, aContent, scrolledFrame, aAbsoluteItems,
childItems, aFixedItems);
// Set the initial child lists
scrolledFrame->SetInitialChildList(*aPresContext, nsnull, childItems.childList);
}
scrollFrame->SetInitialChildList(*aPresContext, nsnull, scrolledFrame);
aNewFrame = scrollFrame;
return NS_OK;
}
nsresult
nsCSSFrameConstructor::ConstructFrameByDisplayType(nsIPresContext* aPresContext,
const nsStyleDisplay* aDisplay,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIStyleContext* aStyleContext,
nsAbsoluteItems& aAbsoluteItems,
nsFrameItems& aFrameItems,
nsAbsoluteItems& aFixedItems)
{
PRBool isAbsolutelyPositioned = PR_FALSE;
PRBool isFixedPositioned = PR_FALSE;
PRBool isBlock = aDisplay->IsBlockLevel();
nsIFrame* newFrame = nsnull; // the frame we construct
nsTableCreator tableCreator; // Used to make table frames.
nsresult rv = NS_OK;
// Get the position syle info
const nsStylePosition* position = (const nsStylePosition*)
aStyleContext->GetStyleData(eStyleStruct_Position);
// The frame is also a block if it's an inline frame that's floated or
// absolutely positioned
if ((NS_STYLE_DISPLAY_INLINE == aDisplay->mDisplay) &&
((NS_STYLE_FLOAT_NONE != aDisplay->mFloats) || position->IsAbsolutelyPositioned())) {
isBlock = PR_TRUE;
}
// If the frame is a block-level frame and is scrollable, then wrap it
// in a scroll frame.
// XXX Applies to replaced elements, too, but how to tell if the element
// is replaced?
// XXX Ignore tables for the time being
if ((isBlock && (aDisplay->mDisplay != NS_STYLE_DISPLAY_TABLE)) &&
IsScrollable(aPresContext, aDisplay)) {
// See if it's absolute positioned or fixed positioned
if (NS_STYLE_POSITION_ABSOLUTE == position->mPosition) {
isAbsolutelyPositioned = PR_TRUE;
} else if (NS_STYLE_POSITION_FIXED == position->mPosition) {
isFixedPositioned = PR_TRUE;
}
// Create a scroll frame
nsIFrame* scrollFrame;
NS_NewScrollFrame(scrollFrame);
// Initialize it
InitializeScrollFrame(scrollFrame, aPresContext, aContent, aParentFrame, aStyleContext,
aAbsoluteItems, newFrame, aFixedItems,
isAbsolutelyPositioned, isFixedPositioned, PR_FALSE);
#if 0 // XXX The following "ifdef" could has been moved to the method "InitializeScrollFrame"
nsIFrame* geometricParent = isAbsolutelyPositioned ? aAbsoluteItems.containingBlock :
aParentFrame;
scrollFrame->Init(*aPresContext, aContent, geometricParent, aStyleContext);
// The scroll frame gets the original style context, and the scrolled
// frame gets a SCROLLED-CONTENT pseudo element style context that
// inherits the background properties
nsIStyleContext* scrolledPseudoStyle = aPresContext->ResolvePseudoStyleContextFor
(aContent, nsHTMLAtoms::scrolledContentPseudo, aStyleContext);
// Create an area container for the frame
nsIFrame* scrolledFrame;
NS_NewAreaFrame(scrolledFrame, NS_BLOCK_SHRINK_WRAP);
// Initialize the frame and force it to have a view
scrolledFrame->Init(*aPresContext, aContent, scrollFrame, scrolledPseudoStyle);
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, scrolledFrame,
scrolledPseudoStyle, PR_TRUE);
NS_RELEASE(scrolledPseudoStyle);
// Process children
if (isAbsolutelyPositioned) {
// The area frame becomes a container for child frames that are
// absolutely positioned
nsAbsoluteItems absoluteItems(scrolledFrame);
nsFrameItems childItems;
ProcessChildren(aPresContext, aContent, scrolledFrame, absoluteItems,
childItems);
// Set the initial child lists
scrolledFrame->SetInitialChildList(*aPresContext, nsnull, childItems.childList);
if (nsnull != absoluteItems.childList) {
scrolledFrame->SetInitialChildList(*aPresContext, nsLayoutAtoms::absoluteList,
absoluteItems.childList);
}
} else {
nsFrameItems childItems;
ProcessChildren(aPresContext, aContent, scrolledFrame, aAbsoluteItems,
childItems);
// Set the initial child lists
scrolledFrame->SetInitialChildList(*aPresContext, nsnull, childItems.childList);
}
scrollFrame->SetInitialChildList(*aPresContext, nsnull, scrolledFrame);
aNewFrame = scrollFrame;
#endif
// See if the frame is absolute or fixed positioned
} else if (position->IsAbsolutelyPositioned() &&
((NS_STYLE_DISPLAY_BLOCK == aDisplay->mDisplay) ||
(NS_STYLE_DISPLAY_INLINE == aDisplay->mDisplay) ||
(NS_STYLE_DISPLAY_LIST_ITEM == aDisplay->mDisplay))) {
if (NS_STYLE_POSITION_ABSOLUTE == position->mPosition) {
isAbsolutelyPositioned = PR_TRUE;
} else {
isFixedPositioned = PR_TRUE;
}
// Create an area frame
NS_NewAreaFrame(newFrame, 0);
newFrame->Init(*aPresContext, aContent, isAbsolutelyPositioned ?
aAbsoluteItems.containingBlock : aFixedItems.containingBlock,
aStyleContext);
// Create a view
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, newFrame,
aStyleContext, PR_FALSE);
// Process the child content. The area frame becomes a container for child
// frames that are absolutely positioned
nsAbsoluteItems absoluteItems(newFrame);
nsFrameItems childItems;
ProcessChildren(aPresContext, aContent, newFrame, absoluteItems, childItems,
aFixedItems);
// Set the frame's initial child list
newFrame->SetInitialChildList(*aPresContext, nsnull, childItems.childList);
if (nsnull != absoluteItems.childList) {
newFrame->SetInitialChildList(*aPresContext, nsLayoutAtoms::absoluteList,
absoluteItems.childList);
}
// See if the frame is floated, and it's a block or inline frame
} else if ((NS_STYLE_FLOAT_NONE != aDisplay->mFloats) &&
((NS_STYLE_DISPLAY_BLOCK == aDisplay->mDisplay) ||
(NS_STYLE_DISPLAY_INLINE == aDisplay->mDisplay) ||
(NS_STYLE_DISPLAY_LIST_ITEM == aDisplay->mDisplay))) {
// Create an area frame
NS_NewAreaFrame(newFrame, NS_BLOCK_SHRINK_WRAP);
// Initialize the frame
newFrame->Init(*aPresContext, aContent, aParentFrame, aStyleContext);
// See if we need to create a view
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, newFrame,
aStyleContext, PR_FALSE);
// Process the child content
nsFrameItems childItems;
ProcessChildren(aPresContext, aContent, newFrame, aAbsoluteItems, childItems,
aFixedItems);
// Set the frame's initial child list
newFrame->SetInitialChildList(*aPresContext, nsnull, childItems.childList);
// See if it's a relatively positioned block
} else if ((NS_STYLE_POSITION_RELATIVE == position->mPosition) &&
((NS_STYLE_DISPLAY_BLOCK == aDisplay->mDisplay))) {
// Create an area frame. No space manager, though
NS_NewAreaFrame(newFrame, NS_AREA_NO_SPACE_MGR);
newFrame->Init(*aPresContext, aContent, aParentFrame, aStyleContext);
// Create a view
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, newFrame,
aStyleContext, PR_FALSE);
// Process the child content. Relatively positioned frames becomes a
// container for child frames that are positioned
nsAbsoluteItems absoluteItems(newFrame);
nsFrameItems childItems;
ProcessChildren(aPresContext, aContent, newFrame, absoluteItems, childItems,
aFixedItems);
// Set the frame's initial child list
newFrame->SetInitialChildList(*aPresContext, nsnull, childItems.childList);
if (nsnull != absoluteItems.childList) {
newFrame->SetInitialChildList(*aPresContext, nsLayoutAtoms::absoluteList,
absoluteItems.childList);
}
} else {
PRBool processChildren = PR_FALSE; // whether we should process child content
nsIFrame* ignore;
// Use the 'display' property to chose a frame type
switch (aDisplay->mDisplay) {
case NS_STYLE_DISPLAY_BLOCK:
case NS_STYLE_DISPLAY_LIST_ITEM:
case NS_STYLE_DISPLAY_RUN_IN:
case NS_STYLE_DISPLAY_COMPACT:
rv = NS_NewBlockFrame(newFrame, 0);
processChildren = PR_TRUE;
break;
case NS_STYLE_DISPLAY_INLINE:
rv = NS_NewInlineFrame(newFrame);
processChildren = PR_TRUE;
break;
case NS_STYLE_DISPLAY_TABLE:
{
nsIFrame* geometricParent = aParentFrame;
if (NS_STYLE_POSITION_ABSOLUTE == position->mPosition) {
isAbsolutelyPositioned = PR_TRUE;
aParentFrame = aAbsoluteItems.containingBlock;
}
if (NS_STYLE_POSITION_FIXED == position->mPosition) {
isFixedPositioned = PR_TRUE;
aParentFrame = aFixedItems.containingBlock;
}
rv = ConstructTableFrame(aPresContext, aContent, geometricParent, aStyleContext,
aAbsoluteItems, newFrame, aFixedItems, tableCreator);
// Note: table construction function takes care of initializing the frame,
// processing children, and setting the initial child list
if (isAbsolutelyPositioned || isFixedPositioned) {
nsIFrame* placeholderFrame;
CreatePlaceholderFrameFor(aPresContext, aContent, newFrame, aStyleContext,
aParentFrame, placeholderFrame);
// Add the positioned frame to its containing block's list of child frames
if (isAbsolutelyPositioned) {
aAbsoluteItems.AddChild(newFrame);
} else {
aFixedItems.AddChild(newFrame);
}
// Add the placeholder frame to the flow
aFrameItems.AddChild(placeholderFrame);
} else {
// Add the table frame to the flow
aFrameItems.AddChild(newFrame);
}
return rv;
}
// the next 5 cases are only relevant if the parent is not a table, ConstructTableFrame handles children
case NS_STYLE_DISPLAY_TABLE_CAPTION:
{
rv = ConstructTableCaptionFrame(aPresContext, aContent, aParentFrame, aStyleContext,
aAbsoluteItems, ignore, newFrame, aFixedItems, tableCreator);
aFrameItems.AddChild(newFrame);
return rv;
}
case NS_STYLE_DISPLAY_TABLE_ROW_GROUP:
case NS_STYLE_DISPLAY_TABLE_HEADER_GROUP:
case NS_STYLE_DISPLAY_TABLE_FOOTER_GROUP:
case NS_STYLE_DISPLAY_TABLE_COLUMN_GROUP:
{
PRBool isRowGroup = (NS_STYLE_DISPLAY_TABLE_COLUMN_GROUP != aDisplay->mDisplay);
rv = ConstructTableGroupFrame(aPresContext, aContent, aParentFrame, aStyleContext,
aAbsoluteItems, isRowGroup, newFrame, ignore, aFixedItems, tableCreator);
aFrameItems.AddChild(newFrame);
return rv;
}
case NS_STYLE_DISPLAY_TABLE_COLUMN:
rv = ConstructTableColFrame(aPresContext, aContent, aParentFrame, aStyleContext,
aAbsoluteItems, newFrame, ignore, aFixedItems, tableCreator);
aFrameItems.AddChild(newFrame);
return rv;
case NS_STYLE_DISPLAY_TABLE_ROW:
rv = ConstructTableRowFrame(aPresContext, aContent, aParentFrame, aStyleContext,
aAbsoluteItems, newFrame, ignore, aFixedItems, tableCreator);
aFrameItems.AddChild(newFrame);
return rv;
case NS_STYLE_DISPLAY_TABLE_CELL:
rv = ConstructTableCellFrame(aPresContext, aContent, aParentFrame, aStyleContext,
aAbsoluteItems, newFrame, ignore, aFixedItems, tableCreator);
aFrameItems.AddChild(newFrame);
return rv;
default:
// Don't create any frame for content that's not displayed...
break;
}
// If we succeeded in creating a frame then initialize the frame and
// process children if requested
if (NS_SUCCEEDED(rv) && (nsnull != newFrame)) {
newFrame->Init(*aPresContext, aContent, aParentFrame, aStyleContext);
// See if we need to create a view, e.g. the frame is absolutely positioned
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, newFrame,
aStyleContext, PR_FALSE);
// Process the child content if requested
nsFrameItems childItems;
if (processChildren) {
rv = ProcessChildren(aPresContext, aContent, newFrame, aAbsoluteItems,
childItems, aFixedItems);
}
// Set the frame's initial child list
newFrame->SetInitialChildList(*aPresContext, nsnull, childItems.childList);
}
}
// If the frame is absolutely positioned, then create a placeholder frame
if (isAbsolutelyPositioned || isFixedPositioned) {
nsIFrame* placeholderFrame;
CreatePlaceholderFrameFor(aPresContext, aContent, newFrame, aStyleContext,
aParentFrame, placeholderFrame);
// Add the positioned frame to its containing block's list of child frames
if (isAbsolutelyPositioned) {
aAbsoluteItems.AddChild(newFrame);
} else {
aFixedItems.AddChild(newFrame);
}
// Add the placeholder frame to the flow
aFrameItems.AddChild(placeholderFrame);
} else if (nsnull != newFrame) {
// Add the frame we just created to the flowed list
aFrameItems.AddChild(newFrame);
}
return rv;
}
nsresult
nsCSSFrameConstructor::GetAdjustedParentFrame(nsIFrame* aCurrentParentFrame,
PRUint8 aChildDisplayType,
nsIFrame*& aNewParentFrame)
{
NS_PRECONDITION(nsnull!=aCurrentParentFrame, "bad arg aCurrentParentFrame");
nsresult rv = NS_OK;
// by default, the new parent frame is the given current parent frame
aNewParentFrame = aCurrentParentFrame;
if (nsnull != aCurrentParentFrame) {
const nsStyleDisplay* currentParentDisplay;
aCurrentParentFrame->GetStyleData(eStyleStruct_Display, (const nsStyleStruct *&)currentParentDisplay);
if (NS_STYLE_DISPLAY_TABLE == currentParentDisplay->mDisplay) {
if (NS_STYLE_DISPLAY_TABLE_CAPTION != aChildDisplayType) {
nsIFrame *innerTableFrame = nsnull;
aCurrentParentFrame->FirstChild(nsnull, &innerTableFrame);
if (nsnull != innerTableFrame) {
const nsStyleDisplay* innerTableDisplay;
innerTableFrame->GetStyleData(eStyleStruct_Display, (const nsStyleStruct *&)innerTableDisplay);
if (NS_STYLE_DISPLAY_TABLE == innerTableDisplay->mDisplay) {
// we were given the outer table frame, use the inner table frame
aNewParentFrame=innerTableFrame;
} // else we were already given the inner table frame
} // else the current parent has no children and cannot be an outer table frame
} // else the child is a caption and really belongs to the outer table frame
}
} else {
rv = NS_ERROR_NULL_POINTER;
}
NS_POSTCONDITION(nsnull!=aNewParentFrame, "bad result null aNewParentFrame");
return rv;
}
PRBool
nsCSSFrameConstructor::IsScrollable(nsIPresContext* aPresContext,
const nsStyleDisplay* aDisplay)
{
// For the time being it's scrollable if the overflow property is auto or
// scroll, regardless of whether the width or height is fixed in size
if ((NS_STYLE_OVERFLOW_SCROLL == aDisplay->mOverflow) ||
(NS_STYLE_OVERFLOW_AUTO == aDisplay->mOverflow)) {
return PR_TRUE;
}
return PR_FALSE;
}
nsresult
nsCSSFrameConstructor::ResolveStyleContext(nsIPresContext* aPresContext,
nsIFrame* aParentFrame,
nsIContent* aContent,
nsIAtom* aTag,
nsIStyleContext** aStyleContext)
{
nsresult rv = NS_OK;
// Resolve the style context based on the content object and the parent
// style context
nsCOMPtr<nsIStyleContext> parentStyleContext;
aParentFrame->GetStyleContext(getter_AddRefs(parentStyleContext));
if (nsLayoutAtoms::textTagName == aTag) {
// Use a special pseudo element style context for text
nsCOMPtr<nsIContent> parentContent;
if (nsnull != aParentFrame) {
aParentFrame->GetContent(getter_AddRefs(parentContent));
}
rv = aPresContext->ResolvePseudoStyleContextFor(parentContent,
nsHTMLAtoms::textPseudo,
parentStyleContext,
PR_FALSE,
aStyleContext);
} else if (nsLayoutAtoms::commentTagName == aTag) {
// Use a special pseudo element style context for comments
nsCOMPtr<nsIContent> parentContent;
if (nsnull != aParentFrame) {
aParentFrame->GetContent(getter_AddRefs(parentContent));
}
rv = aPresContext->ResolvePseudoStyleContextFor(parentContent,
nsHTMLAtoms::commentPseudo,
parentStyleContext,
PR_FALSE,
aStyleContext);
} else {
rv = aPresContext->ResolveStyleContextFor(aContent, parentStyleContext,
PR_FALSE,
aStyleContext);
}
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructFrame(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsAbsoluteItems& aAbsoluteItems,
nsFrameItems& aFrameItems,
nsAbsoluteItems& aFixedItems)
{
NS_PRECONDITION(nsnull != aParentFrame, "no parent frame");
nsresult rv;
// Get the element's tag
nsCOMPtr<nsIAtom> tag;
aContent->GetTag(*getter_AddRefs(tag));
nsCOMPtr<nsIStyleContext> styleContext;
rv = ResolveStyleContext(aPresContext, aParentFrame, aContent, tag, getter_AddRefs(styleContext));
#ifdef chris_needs_to_remove_this
// Resolve the style context based on the content object and the parent
// style context
nsCOMPtr<nsIStyleContext> styleContext;
nsCOMPtr<nsIStyleContext> parentStyleContext;
aParentFrame->GetStyleContext(getter_AddRefs(parentStyleContext));
if (nsLayoutAtoms::textTagName == tag) {
// Use a special pseudo element style context for text
nsCOMPtr<nsIContent> parentContent;
if (nsnull != aParentFrame) {
aParentFrame->GetContent(getter_AddRefs(parentContent));
}
rv = aPresContext->ResolvePseudoStyleContextFor(parentContent,
nsHTMLAtoms::textPseudo,
parentStyleContext,
PR_FALSE,
getter_AddRefs(styleContext));
} else if (nsLayoutAtoms::commentTagName == tag) {
// Use a special pseudo element style context for comments
nsCOMPtr<nsIContent> parentContent;
if (nsnull != aParentFrame) {
aParentFrame->GetContent(getter_AddRefs(parentContent));
}
rv = aPresContext->ResolvePseudoStyleContextFor(parentContent,
nsHTMLAtoms::commentPseudo,
parentStyleContext,
PR_FALSE,
getter_AddRefs(styleContext));
} else {
rv = aPresContext->ResolveStyleContextFor(aContent, parentStyleContext,
PR_FALSE,
getter_AddRefs(styleContext));
}
#endif
if (NS_SUCCEEDED(rv)) {
// Pre-check for display "none" - if we find that, don't create
// any frame at all
const nsStyleDisplay* display = (const nsStyleDisplay*)
styleContext->GetStyleData(eStyleStruct_Display);
if (NS_STYLE_DISPLAY_NONE != display->mDisplay) {
nsIFrame* lastChild = aFrameItems.lastChild;
// Handle specific frame types
rv = ConstructFrameByTag(aPresContext, aContent, aParentFrame, tag,
styleContext, aAbsoluteItems, aFrameItems,
aFixedItems);
#ifdef INCLUDE_XUL
// Failing to find a matching HTML frame, try creating a specialized
// XUL frame. This is temporary, pending planned factoring of this
// whole process into separate, pluggable steps.
if (NS_SUCCEEDED(rv) && ((nsnull == aFrameItems.childList) ||
(lastChild == aFrameItems.lastChild))) {
PRBool haltProcessing = PR_FALSE;
rv = ConstructXULFrame(aPresContext, aContent, aParentFrame, tag,
styleContext, aAbsoluteItems, aFrameItems,
aFixedItems, haltProcessing);
if (haltProcessing) {
return rv;
}
}
#endif
if (NS_SUCCEEDED(rv) && ((nsnull == aFrameItems.childList) ||
(lastChild == aFrameItems.lastChild))) {
// When there is no explicit frame to create, assume it's a
// container and let display style dictate the rest
rv = ConstructFrameByDisplayType(aPresContext, display, aContent, aParentFrame,
styleContext, aAbsoluteItems, aFrameItems,
aFixedItems);
}
}
}
return rv;
}
// XXX we need aFrameSubTree's prev-sibling in order to properly
// place its replacement!
NS_IMETHODIMP
nsCSSFrameConstructor::ReconstructFrames(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIFrame* aFrameSubTree)
{
nsresult rv = NS_OK;
nsIDocument* document;
rv = aContent->GetDocument(document);
if (NS_FAILED(rv)) {
return rv;
}
if (nsnull != document) {
nsCOMPtr<nsIPresShell> shell;
rv = aPresContext->GetShell(getter_AddRefs(shell));
if (NS_SUCCEEDED(rv)) {
// XXX This API needs changing, because it appears to be designed for
// an arbitrary content element, but yet it always constructs the document
// element's frame. Plus it has the problem noted above in the previous XXX
rv = aParentFrame->RemoveFrame(*aPresContext, *shell,
nsnull, aFrameSubTree);
// XXX Remove any existing fixed items...
if (NS_SUCCEEDED(rv)) {
nsIFrame* newChild;
nsCOMPtr<nsIStyleContext> rootPseudoStyle;
nsAbsoluteItems fixedItems(nsnull); // XXX FIX ME...
aParentFrame->GetStyleContext(getter_AddRefs(rootPseudoStyle));
rv = ConstructDocElementFrame(aPresContext, aContent,
aParentFrame, rootPseudoStyle, newChild,
fixedItems);
// XXX Do something with the fixed items...
if (NS_SUCCEEDED(rv)) {
rv = aParentFrame->InsertFrames(*aPresContext, *shell,
nsnull, nsnull, newChild);
}
}
}
NS_RELEASE(document);
}
return rv;
}
nsIFrame*
nsCSSFrameConstructor::GetFrameFor(nsIPresShell* aPresShell, nsIPresContext* aPresContext,
nsIContent* aContent)
{
// Get the primary frame associated with the content
nsIFrame* frame;
aPresShell->GetPrimaryFrameFor(aContent, &frame);
if (nsnull != frame) {
// If the primary frame is a scroll frame, then get the scrolled frame.
// That's the frame that gets the reflow command
const nsStyleDisplay* display;
frame->GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&)display);
if (display->IsBlockLevel() && IsScrollable(aPresContext, display)) {
frame->FirstChild(nsnull, &frame);
} else if (NS_STYLE_DISPLAY_TABLE == display->mDisplay) { // we got an outer table frame, need an inner
frame->FirstChild(nsnull, &frame); // the inner frame is always the 1st child
}
}
return frame;
}
nsIFrame*
nsCSSFrameConstructor::GetAbsoluteContainingBlock(nsIPresContext* aPresContext,
nsIFrame* aFrame)
{
NS_PRECONDITION(nsnull != mInitialContainingBlock, "no initial containing block");
// Starting with aFrame, look for a frame that is absolutely positioned
nsIFrame* containingBlock = aFrame;
while (nsnull != containingBlock) {
const nsStylePosition* position;
// Is it absolutely positioned?
containingBlock->GetStyleData(eStyleStruct_Position, (const nsStyleStruct*&)position);
if (position->mPosition == NS_STYLE_POSITION_ABSOLUTE) {
const nsStyleDisplay* display;
// If it's a table then ignore it, because for the time being tables
// are not containers for absolutely positioned child frames
containingBlock->GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&)display);
if (display->mDisplay != NS_STYLE_DISPLAY_TABLE) {
// XXX If the frame is scrolled, then don't return the scrolled frame
// XXX Verify that the frame type is an area-frame...
break;
}
}
// Continue walking up the hierarchy
containingBlock->GetParent(&containingBlock);
}
// If we didn't find an absolutely positioned containing block, then use the
// initial containing block
if (nsnull == containingBlock) {
containingBlock = mInitialContainingBlock;
}
return containingBlock;
}
NS_IMETHODIMP
nsCSSFrameConstructor::ContentAppended(nsIPresContext* aPresContext,
nsIContent* aContainer,
PRInt32 aNewIndexInContainer)
{
nsCOMPtr<nsIPresShell> shell;
aPresContext->GetShell(getter_AddRefs(shell));
nsIFrame* parentFrame = GetFrameFor(shell, aPresContext, aContainer);
#ifdef NS_DEBUG
if (nsnull == parentFrame) {
NS_WARNING("Ignoring content-appended notification with no matching frame...");
}
#endif
if (nsnull != parentFrame) {
// Get the parent frame's last-in-flow
nsIFrame* nextInFlow = parentFrame;
while (nsnull != nextInFlow) {
parentFrame->GetNextInFlow(&nextInFlow);
if (nsnull != nextInFlow) {
parentFrame = nextInFlow;
}
}
// Get the containing block for absolutely positioned elements
nsIFrame* absoluteContainingBlock = GetAbsoluteContainingBlock(aPresContext,
parentFrame);
// Create some new frames
PRInt32 count;
nsIFrame* firstAppendedFrame = nsnull;
nsAbsoluteItems absoluteItems(absoluteContainingBlock);
nsAbsoluteItems fixedItems(mFixedContainingBlock);
nsFrameItems frameItems;
aContainer->ChildCount(count);
for (PRInt32 i = aNewIndexInContainer; i < count; i++) {
nsCOMPtr<nsIContent> child;
aContainer->ChildAt(i, *getter_AddRefs(child));
ConstructFrame(aPresContext, child, parentFrame, absoluteItems, frameItems,
fixedItems);
}
// Adjust parent frame for table inner/outer frame
// we need to do this here because we need both the parent frame and the constructed frame
nsresult result = NS_OK;
nsIFrame *adjustedParentFrame=parentFrame;
firstAppendedFrame = frameItems.childList;
if (nsnull != firstAppendedFrame) {
const nsStyleDisplay* firstAppendedFrameDisplay;
firstAppendedFrame->GetStyleData(eStyleStruct_Display, (const nsStyleStruct *&)firstAppendedFrameDisplay);
result = GetAdjustedParentFrame(parentFrame, firstAppendedFrameDisplay->mDisplay, adjustedParentFrame);
}
// Notify the parent frame passing it the list of new frames
if (NS_SUCCEEDED(result)) {
result = adjustedParentFrame->AppendFrames(*aPresContext, *shell,
nsnull, firstAppendedFrame);
// If there are new absolutely positioned child frames, then notify
// the parent
// XXX We can't just assume these frames are being appended, we need to
// determine where in the list they should be inserted...
if (nsnull != absoluteItems.childList) {
absoluteItems.containingBlock->AppendFrames(*aPresContext, *shell,
nsLayoutAtoms::absoluteList,
absoluteItems.childList);
}
// If there are new fixed positioned child frames, then notify
// the parent
// XXX We can't just assume these frames are being appended, we need to
// determine where in the list they should be inserted...
if (nsnull != fixedItems.childList) {
fixedItems.containingBlock->AppendFrames(*aPresContext, *shell,
nsLayoutAtoms::fixedList,
fixedItems.childList);
}
}
}
return NS_OK;
}
static nsIFrame*
FindPreviousSibling(nsIPresShell* aPresShell,
nsIContent* aContainer,
PRInt32 aIndexInContainer)
{
nsIFrame* prevSibling = nsnull;
// Note: not all content objects are associated with a frame (e.g., if their
// 'display' type is 'hidden') so keep looking until we find a previous frame
for (PRInt32 index = aIndexInContainer - 1; index >= 0; index--) {
nsCOMPtr<nsIContent> precedingContent;
aContainer->ChildAt(index, *getter_AddRefs(precedingContent));
aPresShell->GetPrimaryFrameFor(precedingContent, &prevSibling);
if (nsnull != prevSibling) {
// The frame may have a next-in-flow. Get the last-in-flow
nsIFrame* nextInFlow;
do {
prevSibling->GetNextInFlow(&nextInFlow);
if (nsnull != nextInFlow) {
prevSibling = nextInFlow;
}
} while (nsnull != nextInFlow);
break;
}
}
return prevSibling;
}
static nsIFrame*
FindNextSibling(nsIPresShell* aPresShell,
nsIContent* aContainer,
PRInt32 aIndexInContainer)
{
nsIFrame* nextSibling = nsnull;
// Note: not all content objects are associated with a frame (e.g., if their
// 'display' type is 'hidden') so keep looking until we find a previous frame
PRInt32 count;
aContainer->ChildCount(count);
for (PRInt32 index = aIndexInContainer + 1; index < count; index++) {
nsCOMPtr<nsIContent> nextContent;
aContainer->ChildAt(index, *getter_AddRefs(nextContent));
aPresShell->GetPrimaryFrameFor(nextContent, &nextSibling);
if (nsnull != nextSibling) {
// The frame may have a next-in-flow. Get the last-in-flow
nsIFrame* nextInFlow;
do {
nextSibling->GetNextInFlow(&nextInFlow);
if (nsnull != nextInFlow) {
nextSibling = nextInFlow;
}
} while (nsnull != nextInFlow);
break;
}
}
return nextSibling;
}
NS_IMETHODIMP
nsCSSFrameConstructor::ContentInserted(nsIPresContext* aPresContext,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer)
{
nsCOMPtr<nsIPresShell> shell;
aPresContext->GetShell(getter_AddRefs(shell));
nsresult rv = NS_OK;
// If we have a null parent, then this must be the document element
// being inserted
if (nsnull == aContainer) {
NS_PRECONDITION(nsnull == mInitialContainingBlock, "initial containing block already created");
nsIContent* docElement = mDocument->GetRootContent();
// Get the style context of the containing block frame
nsCOMPtr<nsIStyleContext> containerStyle;
mDocElementContainingBlock->GetStyleContext(getter_AddRefs(containerStyle));
// Create frames for the document element and its child elements
nsIFrame* docElementFrame;
nsAbsoluteItems fixedItems(mFixedContainingBlock);
ConstructDocElementFrame(aPresContext,
docElement,
mDocElementContainingBlock,
containerStyle,
docElementFrame,
fixedItems);
NS_IF_RELEASE(docElement);
// Set the initial child list for the parent
mDocElementContainingBlock->SetInitialChildList(*aPresContext,
nsnull,
docElementFrame);
// Tell the fixed containing block about its 'fixed' frames
if (nsnull != fixedItems.childList) {
mFixedContainingBlock->SetInitialChildList(*aPresContext,
nsLayoutAtoms::fixedList,
fixedItems.childList);
}
}
else {
// Find the frame that precedes the insertion point.
nsIFrame* prevSibling = FindPreviousSibling(shell, aContainer, aIndexInContainer);
nsIFrame* nextSibling = nsnull;
PRBool isAppend = PR_FALSE;
// If there is no previous sibling, then find the frame that follows
if (nsnull == prevSibling) {
nextSibling = FindNextSibling(shell, aContainer, aIndexInContainer);
}
// Get the geometric parent.
nsIFrame* parentFrame;
if ((nsnull == prevSibling) && (nsnull == nextSibling)) {
// No previous or next sibling so treat this like an appended frame.
// XXX This won't always be true if there's auto-generated before/after
// content
isAppend = PR_TRUE;
shell->GetPrimaryFrameFor(aContainer, &parentFrame);
} else {
// Use the prev sibling if we have it; otherwise use the next sibling
if (nsnull != prevSibling) {
prevSibling->GetParent(&parentFrame);
} else {
nextSibling->GetParent(&parentFrame);
}
}
// Construct a new frame
if (nsnull != parentFrame) {
// Get the containing block for absolutely positioned elements
nsIFrame* absoluteContainingBlock = GetAbsoluteContainingBlock(aPresContext,
parentFrame);
nsAbsoluteItems absoluteItems(absoluteContainingBlock);
nsFrameItems frameItems;
nsAbsoluteItems fixedItems(mFixedContainingBlock);
rv = ConstructFrame(aPresContext, aChild, parentFrame, absoluteItems, frameItems,
fixedItems);
nsIFrame* newFrame = frameItems.childList;
if (NS_SUCCEEDED(rv) && (nsnull != newFrame)) {
// Notify the parent frame
if (isAppend) {
rv = parentFrame->AppendFrames(*aPresContext, *shell,
nsnull, newFrame);
} else {
rv = parentFrame->InsertFrames(*aPresContext, *shell, nsnull,
prevSibling, newFrame);
}
// If there are new absolutely positioned child frames, then notify
// the parent
// XXX We can't just assume these frames are being appended, we need to
// determine where in the list they should be inserted...
if (nsnull != absoluteItems.childList) {
rv = absoluteItems.containingBlock->AppendFrames(*aPresContext, *shell,
nsLayoutAtoms::absoluteList,
absoluteItems.childList);
}
// If there are new fixed positioned child frames, then notify
// the parent
// XXX We can't just assume these frames are being appended, we need to
// determine where in the list they should be inserted...
if (nsnull != fixedItems.childList) {
rv = fixedItems.containingBlock->AppendFrames(*aPresContext, *shell,
nsLayoutAtoms::fixedList,
fixedItems.childList);
}
}
}
}
return rv;
}
NS_IMETHODIMP
nsCSSFrameConstructor::ContentReplaced(nsIPresContext* aPresContext,
nsIContent* aContainer,
nsIContent* aOldChild,
nsIContent* aNewChild,
PRInt32 aIndexInContainer)
{
// XXX For now, do a brute force remove and insert.
nsresult res = ContentRemoved(aPresContext, aContainer,
aOldChild, aIndexInContainer);
if (NS_OK == res) {
res = ContentInserted(aPresContext, aContainer,
aNewChild, aIndexInContainer);
}
return res;
}
NS_IMETHODIMP
nsCSSFrameConstructor::ContentRemoved(nsIPresContext* aPresContext,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer)
{
nsCOMPtr<nsIPresShell> shell;
aPresContext->GetShell(getter_AddRefs(shell));
nsresult rv = NS_OK;
// Find the child frame
nsIFrame* childFrame;
shell->GetPrimaryFrameFor(aChild, &childFrame);
if (nsnull != childFrame) {
// See if it's absolutely positioned
const nsStylePosition* position;
childFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct*&)position);
if (position->IsAbsolutelyPositioned()) {
// Get the placeholder frame
nsIFrame* placeholderFrame;
shell->GetPlaceholderFrameFor(childFrame, &placeholderFrame);
// Remove the mapping from the frame to its placeholder
shell->SetPlaceholderFrameFor(childFrame, nsnull);
// Generate two notifications. First for the absolutely positioned
// frame
nsIFrame* parentFrame;
childFrame->GetParent(&parentFrame);
rv = parentFrame->RemoveFrame(*aPresContext, *shell,
nsLayoutAtoms::absoluteList, childFrame);
// Now the placeholder frame
if (nsnull != placeholderFrame) {
placeholderFrame->GetParent(&parentFrame);
rv = parentFrame->RemoveFrame(*aPresContext, *shell, nsnull,
placeholderFrame);
}
} else {
// Notify the parent frame that it should delete the frame
nsIFrame* parentFrame;
childFrame->GetParent(&parentFrame);
rv = parentFrame->RemoveFrame(*aPresContext, *shell, nsnull, childFrame);
}
if (mInitialContainingBlock == childFrame) {
mInitialContainingBlock = nsnull;
}
}
return rv;
}
static void
ApplyRenderingChangeToTree(nsIPresContext* aPresContext,
nsIFrame* aFrame)
{
nsIViewManager* viewManager = nsnull;
// Trigger rendering updates by damaging this frame and any
// continuations of this frame.
while (nsnull != aFrame) {
// Get the frame's bounding rect
nsRect r;
aFrame->GetRect(r);
r.x = 0;
r.y = 0;
// Get view if this frame has one and trigger an update. If the
// frame doesn't have a view, find the nearest containing view
// (adjusting r's coordinate system to reflect the nesting) and
// update there.
nsIView* view;
aFrame->GetView(&view);
if (nsnull != view) {
} else {
nsPoint offset;
aFrame->GetOffsetFromView(offset, &view);
NS_ASSERTION(nsnull != view, "no view");
r += offset;
}
if (nsnull == viewManager) {
view->GetViewManager(viewManager);
}
const nsStyleColor* color;
const nsStyleDisplay* disp;
aFrame->GetStyleData(eStyleStruct_Color, (const nsStyleStruct*&) color);
aFrame->GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&) disp);
view->SetVisibility(NS_STYLE_VISIBILITY_HIDDEN == disp->mVisible ?nsViewVisibility_kHide:nsViewVisibility_kShow);
viewManager->SetViewOpacity(view, color->mOpacity);
viewManager->UpdateView(view, r, NS_VMREFRESH_NO_SYNC);
aFrame->GetNextInFlow(&aFrame);
}
if (nsnull != viewManager) {
viewManager->Composite();
NS_RELEASE(viewManager);
}
}
static void
StyleChangeReflow(nsIPresContext* aPresContext,
nsIFrame* aFrame,
nsIAtom * aAttribute)
{
nsCOMPtr<nsIPresShell> shell;
aPresContext->GetShell(getter_AddRefs(shell));
nsIReflowCommand* reflowCmd;
nsresult rv = NS_NewHTMLReflowCommand(&reflowCmd, aFrame,
nsIReflowCommand::StyleChanged,
nsnull,
aAttribute);
if (NS_SUCCEEDED(rv)) {
shell->AppendReflowCommand(reflowCmd);
NS_RELEASE(reflowCmd);
}
}
NS_IMETHODIMP
nsCSSFrameConstructor::ContentChanged(nsIPresContext* aPresContext,
nsIContent* aContent,
nsISupports* aSubContent)
{
nsCOMPtr<nsIPresShell> shell;
aPresContext->GetShell(getter_AddRefs(shell));
nsresult rv = NS_OK;
// Find the child frame
nsIFrame* frame;
shell->GetPrimaryFrameFor(aContent, &frame);
// Notify the first frame that maps the content. It will generate a reflow
// command
// It's possible the frame whose content changed isn't inserted into the
// frame hierarchy yet, or that there is no frame that maps the content
if (nsnull != frame) {
#if 0
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
("nsHTMLStyleSheet::ContentChanged: content=%p[%s] subcontent=%p frame=%p",
aContent, ContentTag(aContent, 0),
aSubContent, frame));
#endif
frame->ContentChanged(aPresContext, aContent, aSubContent);
}
return rv;
}
NS_IMETHODIMP
nsCSSFrameConstructor::AttributeChanged(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIAtom* aAttribute,
PRInt32 aHint)
{
nsresult result = NS_OK;
nsCOMPtr<nsIPresShell> shell;
aPresContext->GetShell(getter_AddRefs(shell));
nsIFrame* frame;
shell->GetPrimaryFrameFor(aContent, &frame);
PRBool restyle = PR_FALSE;
PRBool reflow = PR_FALSE;
PRBool reframe = PR_FALSE;
PRBool render = PR_FALSE;
#if 0
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
("HTMLStyleSheet::AttributeChanged: content=%p[%s] frame=%p",
aContent, ContentTag(aContent, 0), frame));
#endif
// the style tag has its own interpretation based on aHint
if ((nsHTMLAtoms::style != aAttribute) && (NS_STYLE_HINT_UNKNOWN == aHint)) {
nsIHTMLContent* htmlContent;
result = aContent->QueryInterface(kIHTMLContentIID, (void**)&htmlContent);
if (NS_OK == result) {
// Get style hint from HTML content object.
htmlContent->GetStyleHintForAttributeChange(aAttribute, &aHint);
NS_RELEASE(htmlContent);
}
else aHint = NS_STYLE_HINT_REFLOW;
}
switch (aHint) {
default:
case NS_STYLE_HINT_UNKNOWN:
case NS_STYLE_HINT_FRAMECHANGE:
reframe = PR_TRUE;
case NS_STYLE_HINT_REFLOW:
reflow = PR_TRUE;
case NS_STYLE_HINT_VISUAL:
render = PR_TRUE;
case NS_STYLE_HINT_CONTENT:
case NS_STYLE_HINT_AURAL:
restyle = PR_TRUE;
break;
case NS_STYLE_HINT_NONE:
break;
}
// apply changes
if (PR_TRUE == reframe) {
RecreateFramesOnAttributeChange(aPresContext, aContent, aAttribute);
}
else if (PR_TRUE == restyle) {
// If there is no frame then there is no point in re-styling it,
// is there?
if (nsnull != frame) {
nsIStyleContext* frameContext;
frame->GetStyleContext(&frameContext);
NS_ASSERTION(nsnull != frameContext, "frame must have style context");
if (nsnull != frameContext) {
nsIStyleContext* parentContext = frameContext->GetParent();
frame->ReResolveStyleContext(aPresContext, parentContext);
NS_IF_RELEASE(parentContext);
NS_RELEASE(frameContext);
}
if (PR_TRUE == reflow) {
StyleChangeReflow(aPresContext, frame, aAttribute);
}
else if (PR_TRUE == render) {
ApplyRenderingChangeToTree(aPresContext, frame);
}
else { // let the frame deal with it, since we don't know how to
frame->AttributeChanged(aPresContext, aContent, aAttribute, aHint);
}
}
}
return result;
}
// Style change notifications
NS_IMETHODIMP
nsCSSFrameConstructor::StyleRuleChanged(nsIPresContext* aPresContext,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule,
PRInt32 aHint)
{
nsCOMPtr<nsIPresShell> shell;
aPresContext->GetShell(getter_AddRefs(shell));
nsIFrame* frame;
shell->GetRootFrame(&frame);
PRBool reframe = PR_FALSE;
PRBool reflow = PR_FALSE;
PRBool render = PR_FALSE;
PRBool restyle = PR_FALSE;
switch (aHint) {
default:
case NS_STYLE_HINT_UNKNOWN:
case NS_STYLE_HINT_FRAMECHANGE:
reframe = PR_TRUE;
case NS_STYLE_HINT_REFLOW:
reflow = PR_TRUE;
case NS_STYLE_HINT_VISUAL:
render = PR_TRUE;
case NS_STYLE_HINT_CONTENT:
case NS_STYLE_HINT_AURAL:
restyle = PR_TRUE;
break;
case NS_STYLE_HINT_NONE:
break;
}
if (restyle) {
nsIStyleContext* sc;
frame->GetStyleContext(&sc);
sc->RemapStyle(aPresContext);
NS_RELEASE(sc);
// XXX hack, skip the root and scrolling frames
frame->FirstChild(nsnull, &frame);
frame->FirstChild(nsnull, &frame);
if (reframe) {
NS_NOTYETIMPLEMENTED("frame change reflow");
}
else if (reflow) {
StyleChangeReflow(aPresContext, frame, nsnull);
}
else if (render) {
ApplyRenderingChangeToTree(aPresContext, frame);
}
}
return NS_OK;
}
NS_IMETHODIMP
nsCSSFrameConstructor::StyleRuleAdded(nsIPresContext* aPresContext,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule)
{
return NS_OK;
}
NS_IMETHODIMP
nsCSSFrameConstructor::StyleRuleRemoved(nsIPresContext* aPresContext,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule)
{
return NS_OK;
}
// Construct an alternate frame to use when the image can't be rendered
nsresult
nsCSSFrameConstructor::ConstructAlternateImageFrame(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIFrame*& aFrame)
{
nsIDOMHTMLImageElement* imageElement;
nsresult rv;
// Initialize OUT parameter
aFrame = nsnull;
rv = aContent->QueryInterface(kIDOMHTMLImageElementIID, (void**)&imageElement);
if (NS_SUCCEEDED(rv)) {
nsAutoString altText;
// The "alt" attribute specifies alternate text that is rendered
// when the image can not be displayed
imageElement->GetAlt(altText);
if (0 == altText.Length()) {
// If there's no "alt" attribute, then use the value of the "title"
// attribute
imageElement->GetTitle(altText);
}
if (0 == altText.Length()) {
// If there's no "title" attribute, then use the filename minus the
// extension
nsAutoString srcURI;
imageElement->GetSrc(srcURI);
if (srcURI.Length() > 0) {
nsIURL* url;
if (NS_SUCCEEDED(NS_NewURL(&url, srcURI))) {
const char* file;
url->GetFile(&file);
altText = file;
NS_RELEASE(url);
// Trim off the path part of the filename
PRInt32 offset = altText.RFind('/');
if (offset >= 0) {
altText.Cut(0, offset + 1);
}
// Trim off the extension
offset = altText.RFind('.');
if (offset >= 0) {
altText.Truncate(offset);
}
}
}
}
NS_RELEASE(imageElement);
if (altText.Length() > 0) {
// Create a text content element for the alternate text
nsCOMPtr<nsIContent> altTextContent;
nsIDOMCharacterData* domData;
NS_NewTextNode(getter_AddRefs(altTextContent));
altTextContent->QueryInterface(kIDOMCharacterDataIID, (void**)&domData);
domData->SetData(altText);
NS_RELEASE(domData);
// Create an inline frame and a text frame to display the alt-text.
// XXX The only reason for the inline frame is so there's a frame that
// points to the IMG content element. Some day when we have a hash table
// for GetPrimaryFrameFor() we don't need the inline frame...
nsIFrame* inlineFrame;
nsIFrame* textFrame;
NS_NewInlineFrame(inlineFrame);
NS_NewTextFrame(textFrame);
// Use a special text pseudo element style context
nsCOMPtr<nsIStyleContext> textStyleContext;
nsCOMPtr<nsIStyleContext> parentStyleContext;
nsCOMPtr<nsIContent> parentContent;
aParentFrame->GetContent(getter_AddRefs(parentContent));
aParentFrame->GetStyleContext(getter_AddRefs(parentStyleContext));
aPresContext->ResolvePseudoStyleContextFor(parentContent, nsHTMLAtoms::textPseudo,
parentStyleContext,
PR_FALSE,
getter_AddRefs(textStyleContext));
// Initialize the frames
inlineFrame->Init(*aPresContext, aContent, aParentFrame, textStyleContext);
textFrame->Init(*aPresContext, altTextContent, inlineFrame, textStyleContext);
inlineFrame->SetInitialChildList(*aPresContext, nsnull, textFrame);
// Return the inline frame
aFrame = inlineFrame;
}
}
return rv;
}
NS_IMETHODIMP
nsCSSFrameConstructor::CantRenderReplacedElement(nsIPresContext* aPresContext,
nsIFrame* aFrame)
{
nsCOMPtr<nsIContent> content;
nsCOMPtr<nsIAtom> tag;
nsIFrame* parentFrame;
nsresult rv = NS_OK;
aFrame->GetParent(&parentFrame);
// Get the content object associated with aFrame
aFrame->GetContent(getter_AddRefs(content));
NS_ASSERTION(content, "null content object");
content->GetTag(*getter_AddRefs(tag));
// Get the previous sibling frame
// XXX Handle absolutely positioned and floated elements...
nsIFrame* firstChild;
parentFrame->FirstChild(nsnull, &firstChild);
nsFrameList frameList(firstChild);
nsIFrame* prevSibling = frameList.GetPrevSiblingFor(aFrame);
// See whether it's an IMG or an OBJECT element
if (nsHTMLAtoms::img == tag.get()) {
// It's an IMG element. Try and construct an alternate frame to use when the
// image can't be rendered
nsIFrame* newFrame;
rv = ConstructAlternateImageFrame(aPresContext, content, parentFrame, newFrame);
if (NS_SUCCEEDED(rv)) {
// Delete the current frame and insert the new frame
nsCOMPtr<nsIPresShell> presShell;
aPresContext->GetShell(getter_AddRefs(presShell));
parentFrame->RemoveFrame(*aPresContext, *presShell, nsnull, aFrame);
parentFrame->InsertFrames(*aPresContext, *presShell, nsnull, prevSibling, newFrame);
}
} else if (nsHTMLAtoms::object == tag.get()) {
// It's an OBJECT element, so we should display the contents instead
nsCOMPtr<nsIStyleContext> styleContext;
const nsStyleDisplay* display;
aFrame->GetStyleContext(getter_AddRefs(styleContext));
display = (const nsStyleDisplay*)styleContext->GetStyleData(eStyleStruct_Display);
// Get the containing block for absolutely positioned elements
nsIFrame* absoluteContainingBlock = GetAbsoluteContainingBlock(aPresContext,
parentFrame);
// Create a frame based on the display type
nsAbsoluteItems absoluteItems(absoluteContainingBlock);
nsFrameItems frameItems;
nsAbsoluteItems fixedItems(mFixedContainingBlock);
rv = ConstructFrameByDisplayType(aPresContext, display, content, parentFrame,
styleContext, absoluteItems, frameItems,
fixedItems);
nsIFrame* newFrame = frameItems.childList;
if (NS_SUCCEEDED(rv)) {
// Delete the current frame and insert the new frame
nsCOMPtr<nsIPresShell> presShell;
aPresContext->GetShell(getter_AddRefs(presShell));
parentFrame->RemoveFrame(*aPresContext, *presShell, nsnull, aFrame);
parentFrame->InsertFrames(*aPresContext, *presShell, nsnull, prevSibling, newFrame);
// If there are new absolutely positioned child frames, then notify
// the parent
// XXX We can't just assume these frames are being appended, we need to
// determine where in the list they should be inserted...
if (nsnull != absoluteItems.childList) {
rv = absoluteItems.containingBlock->AppendFrames(*aPresContext, *presShell,
nsLayoutAtoms::absoluteList,
absoluteItems.childList);
}
// If there are new fixed positioned child frames, then notify
// the parent
// XXX We can't just assume these frames are being appended, we need to
// determine where in the list they should be inserted...
if (nsnull != fixedItems.childList) {
rv = fixedItems.containingBlock->AppendFrames(*aPresContext, *presShell,
nsLayoutAtoms::fixedList,
fixedItems.childList);
}
}
} else {
NS_ASSERTION(PR_FALSE, "unexpected tag");
}
return rv;
}
NS_IMETHODIMP
nsCSSFrameConstructor::CreateContinuingFrame(nsIPresContext* aPresContext,
nsIFrame* aFrame,
nsIFrame* aParentFrame,
nsIFrame** aContinuingFrame)
{
nsresult rv;
nsIFrame* continuingFrame;
nsIStyleContext* styleContext;
aFrame->GetStyleContext(&styleContext);
rv = aFrame->CreateContinuingFrame(*aPresContext, aParentFrame, styleContext,
continuingFrame);
NS_RELEASE(styleContext);
*aContinuingFrame = continuingFrame;
return rv;
}
nsresult
nsCSSFrameConstructor::RecreateFramesOnAttributeChange(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIAtom* aAttribute)
{
nsresult rv = NS_OK;
// First, remove the frames associated with the content object on which the
// attribute change occurred.
// XXX Right now, ContentRemoved() does not do anything with its aContainer
// and aIndexInContainer in parameters, so I am passing in null and 0, respectively
rv = ContentRemoved(aPresContext, nsnull, aContent, 0);
if (NS_OK == rv) {
// Now, recreate the frames associated with this content object.
nsIContent *container;
rv = aContent->GetParent(container);
if (NS_OK == rv) {
PRInt32 indexInContainer;
rv = container->IndexOf(aContent, indexInContainer);
if (NS_OK == rv) {
rv = ContentInserted(aPresContext, container, aContent, indexInContainer);
}
NS_RELEASE(container);
}
}
return rv;
}
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