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gecko-dev/layout/base/nsCSSFrameConstructor.cpp
hyatt%netscape.com 9a32c8bde5 Fix for bug 5602.
1999-05-17 09:02:45 +00:00

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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 "nsIStyleSet.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 "nsIDOMCharacterData.h"
#include "nsIDOMHTMLImageElement.h"
#include "nsITextContent.h"
#include "nsPlaceholderFrame.h"
#include "nsTableRowGroupFrame.h"
#include "nsStyleChangeList.h"
#include "nsIFormControl.h"
#include "nsCSSAtoms.h"
#include "nsIDeviceContext.h"
#include "nsTextFragment.h"
#ifdef INCLUDE_XUL
#include "nsXULAtoms.h"
#include "nsTriStateCheckboxFrame.h"
#include "nsSliderFrame.h"
#include "nsScrollbarFrame.h"
#include "nsSpinnerFrame.h"
#include "nsColorPickerFrame.h"
#include "nsFontPickerFrame.h"
#include "nsTreeFrame.h"
#include "nsToolboxFrame.h"
#include "nsToolbarFrame.h"
#include "nsTreeIndentationFrame.h"
#include "nsTreeCellFrame.h"
nsresult
NS_NewTabFrame ( nsIFrame** aNewFrame );
nsresult
NS_NewDeckFrame ( nsIFrame** aNewFrame );
nsresult
NS_NewProgressMeterFrame ( nsIFrame** aNewFrame );
nsresult
NS_NewTitledButtonFrame ( nsIFrame** aNewFrame );
nsresult
NS_NewBoxFrame ( nsIFrame** aNewFrame );
#endif
//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);
static NS_DEFINE_IID(kIFormControlIID, NS_IFORMCONTROL_IID);
static NS_DEFINE_IID(kIFrameIID, NS_IFRAME_IID);
// Structure used when constructing formatting object trees.
struct nsFrameItems {
nsIFrame* childList;
nsIFrame* lastChild;
nsFrameItems(nsIFrame* aFrame = nsnull);
// Appends the frame to the end of the list
void AddChild(nsIFrame* aChild);
};
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 {
// containing block for absolutely positioned elements
nsIFrame* containingBlock;
nsAbsoluteItems(nsIFrame* aContainingBlock = nsnull);
// Appends the frame to the end of the list
void AddChild(nsIFrame* aChild);
};
nsAbsoluteItems::nsAbsoluteItems(nsIFrame* aContainingBlock)
: containingBlock(aContainingBlock)
{
}
// Additional behavior is that it sets the frame's NS_FRAME_OUT_OF_FLOW flag
void
nsAbsoluteItems::AddChild(nsIFrame* aChild)
{
nsFrameState frameState;
// Mark the frame as being moved out of the flow
aChild->GetFrameState(&frameState);
aChild->SetFrameState(frameState | NS_FRAME_OUT_OF_FLOW);
nsFrameItems::AddChild(aChild);
}
// -----------------------------------------------------------
// Structure for saving the existing state when pushing/poping containing
// blocks. The destructor restores the state to its previous state
class nsFrameConstructorSaveState {
public:
nsFrameConstructorSaveState();
~nsFrameConstructorSaveState();
private:
nsAbsoluteItems* mItems; // pointer to struct whose data we save/restore
nsAbsoluteItems mSavedItems; // copy of original data
friend class nsFrameConstructorState;
};
// Structure used for maintaining state information during the
// frame construction process
class nsFrameConstructorState {
public:
// Containing block information for out-of-flow frammes
nsAbsoluteItems mFixedItems;
nsAbsoluteItems mAbsoluteItems;
nsAbsoluteItems mFloatedItems;
// Constructor
nsFrameConstructorState(nsIFrame* aFixedContainingBlock,
nsIFrame* aAbsoluteContainingBlock,
nsIFrame* aFloaterContainingBlock);
// Function to push the existing absolute containing block state and
// create a new scope
void PushAbsoluteContainingBlock(nsIFrame* aNewAbsoluteContainingBlock,
nsFrameConstructorSaveState& aSaveState);
// Function to push the existing floater containing block state and
// create a new scope
void PushFloaterContainingBlock(nsIFrame* aNewFloaterContainingBlock,
nsFrameConstructorSaveState& aSaveState);
};
nsFrameConstructorState::nsFrameConstructorState(nsIFrame* aFixedContainingBlock,
nsIFrame* aAbsoluteContainingBlock,
nsIFrame* aFloaterContainingBlock)
: mFixedItems(aFixedContainingBlock),
mAbsoluteItems(aAbsoluteContainingBlock),
mFloatedItems(aFloaterContainingBlock)
{
}
void
nsFrameConstructorState::PushAbsoluteContainingBlock(nsIFrame* aNewAbsoluteContainingBlock,
nsFrameConstructorSaveState& aSaveState)
{
aSaveState.mItems = &mAbsoluteItems;
aSaveState.mSavedItems = mAbsoluteItems;
mAbsoluteItems = nsAbsoluteItems(aNewAbsoluteContainingBlock);
}
void
nsFrameConstructorState::PushFloaterContainingBlock(nsIFrame* aNewFloaterContainingBlock,
nsFrameConstructorSaveState& aSaveState)
{
aSaveState.mItems = &mFloatedItems;
aSaveState.mSavedItems = mFloatedItems;
mFloatedItems = nsAbsoluteItems(aNewFloaterContainingBlock);
}
nsFrameConstructorSaveState::nsFrameConstructorSaveState()
: mItems(0)
{
}
nsFrameConstructorSaveState::~nsFrameConstructorSaveState()
{
// Restore the state
if (mItems) {
*mItems = mSavedItems;
}
}
// -----------------------------------------------------------
// 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;
}
// Helper function that determines the child list name that aChildFrame
// is contained in
static void
GetChildListNameFor(nsIFrame* aParentFrame,
nsIFrame* aChildFrame,
nsIAtom** aListName)
{
nsFrameState frameState;
nsIAtom* listName;
// See if the frame is moved out of the flow
aChildFrame->GetFrameState(&frameState);
if (frameState & NS_FRAME_OUT_OF_FLOW) {
// Look at the style information to tell
const nsStylePosition* position;
aChildFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct*&)position);
if (NS_STYLE_POSITION_ABSOLUTE == position->mPosition) {
listName = nsLayoutAtoms::absoluteList;
} else if (NS_STYLE_POSITION_FIXED == position->mPosition) {
listName = nsLayoutAtoms::fixedList;
} else {
#ifdef NS_DEBUG
const nsStyleDisplay* display;
aChildFrame->GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&)display);
NS_ASSERTION(display->IsFloating(), "not a floated frame");
#endif
listName = nsLayoutAtoms::floaterList;
}
} else {
listName = nsnull;
}
// Verify that the frame is actually in that child list
#ifdef NS_DEBUG
nsIFrame* firstChild;
aParentFrame->FirstChild(listName, &firstChild);
nsFrameList frameList(firstChild);
NS_ASSERTION(frameList.ContainsFrame(aChildFrame), "not in child list");
#endif
NS_IF_ADDREF(listName);
*aListName = listName;
}
nsresult
nsCSSFrameConstructor::CreateGeneratedFrameFor(nsIPresContext* aPresContext,
nsIFrame* aParentFrame,
nsIContent* aContent,
nsIStyleContext* aStyleContext,
const nsStyleContent* aStyleContent,
PRUint32 aContentIndex,
nsIFrame** aFrame)
{
*aFrame = nsnull; // initialize OUT parameter
// Get the content value
nsStyleContentType type;
nsAutoString contentString;
aStyleContent->GetContentAt(aContentIndex, type, contentString);
if (eStyleContentType_URL == type) {
nsIHTMLContent* imageContent;
// Create an HTML image content object, and set the SRC.
// XXX Check if it's an image type we can handle...
NS_NewHTMLImageElement(&imageContent, nsHTMLAtoms::img);
imageContent->SetHTMLAttribute(nsHTMLAtoms::src, contentString, PR_FALSE);
// Create an image frame and initialize it
nsIFrame* imageFrame;
NS_NewImageFrame(&imageFrame);
imageFrame->Init(*aPresContext, imageContent, aParentFrame, aStyleContext, nsnull);
NS_RELEASE(imageContent);
// Return the image frame
*aFrame = imageFrame;
} else {
switch (type) {
case eStyleContentType_String:
break;
case eStyleContentType_Attr:
{ // XXX for now, prefetch the attr value, this needs to be a special content node
nsIAtom* attrName = NS_NewAtom(contentString);
aContent->GetAttribute(kNameSpaceID_None, attrName, contentString); // XXX need attr namespace from style
NS_RELEASE(attrName);
}
break;
case eStyleContentType_Counter:
case eStyleContentType_Counters:
case eStyleContentType_URL:
return NS_ERROR_NOT_IMPLEMENTED; // XXX not supported yet...
case eStyleContentType_OpenQuote:
case eStyleContentType_CloseQuote:
{
PRUint32 quotesCount = aStyleContent->QuotesCount();
if (quotesCount > 0) {
nsAutoString openQuote, closeQuote;
// If the depth is greater than the number of pairs, the last pair
// is repeated
PRUint32 quoteDepth = 0; // XXX really track the nested quotes...
if (quoteDepth > quotesCount) {
quoteDepth = quotesCount - 1;
}
aStyleContent->GetQuotesAt(quoteDepth, openQuote, closeQuote);
if (eStyleContentType_OpenQuote == type) {
contentString = openQuote;
} else {
contentString = closeQuote;
}
} else {
contentString = '\"';
}
}
break;
case eStyleContentType_NoOpenQuote:
case eStyleContentType_NoCloseQuote:
// XXX Adjust quote depth...
return NS_OK;
}
// Create a text content node
nsIContent* textContent;
nsIDOMCharacterData* domData;
NS_NewTextNode(&textContent);
textContent->QueryInterface(kIDOMCharacterDataIID, (void**)&domData);
domData->SetData(contentString);
NS_RELEASE(domData);
// Create a text frame and initialize it
nsIFrame* textFrame;
NS_NewTextFrame(&textFrame);
textFrame->Init(*aPresContext, textContent, aParentFrame, aStyleContext, nsnull);
NS_RELEASE(textContent);
// Return the text frame
*aFrame = textFrame;
}
return NS_OK;
}
PRBool
nsCSSFrameConstructor::CreateGeneratedContentFrame(nsIPresContext* aPresContext,
nsIFrame* aFrame,
nsIContent* aContent,
nsIStyleContext* aStyleContext,
nsIAtom* aPseudoElement,
nsIFrame** aResult)
{
*aResult = nsnull; // initialize OUT parameter
// Probe for the existence of the pseudo-element
nsIStyleContext* pseudoStyleContext;
aPresContext->ProbePseudoStyleContextFor(aContent, aPseudoElement, aStyleContext,
PR_FALSE, &pseudoStyleContext);
if (pseudoStyleContext) {
const nsStyleDisplay* display;
// See whether the generated content should be displayed.
display = (const nsStyleDisplay*)pseudoStyleContext->GetStyleData(eStyleStruct_Display);
if (NS_STYLE_DISPLAY_NONE != display->mDisplay) {
// See if there was any content specified
const nsStyleContent* styleContent =
(const nsStyleContent*)pseudoStyleContext->GetStyleData(eStyleStruct_Content);
PRUint32 contentCount = styleContent->ContentCount();
if (contentCount > 0) {
PRUint8 displayValue = display->mDisplay;
// Make sure the 'display' property value is allowable
const nsStyleDisplay* subjectDisplay = (const nsStyleDisplay*)
aStyleContext->GetStyleData(eStyleStruct_Display);
if (subjectDisplay->IsBlockLevel()) {
// For block-level elements the only allowed 'display' values are:
// 'none', 'inline', 'block', and 'marker'
if ((NS_STYLE_DISPLAY_INLINE != displayValue) &&
(NS_STYLE_DISPLAY_BLOCK != displayValue) &&
(NS_STYLE_DISPLAY_MARKER != displayValue)) {
// Pseudo-element behaves as if the value were 'block'
displayValue = NS_STYLE_DISPLAY_BLOCK;
}
} else {
// For inline-level elements the only allowed 'display' values are
// 'none' and 'inline'
displayValue = NS_STYLE_DISPLAY_INLINE;
}
if (display->mDisplay != displayValue) {
// Reset the value
nsStyleDisplay* mutableDisplay = (nsStyleDisplay*)
pseudoStyleContext->GetMutableStyleData(eStyleStruct_Display);
mutableDisplay->mDisplay = displayValue;
}
// Also make sure the 'position' property is 'static'. :before and :after
// pseudo-elements can not be floated or positioned
const nsStylePosition * stylePosition =
(const nsStylePosition*)pseudoStyleContext->GetStyleData(eStyleStruct_Position);
if (NS_STYLE_POSITION_NORMAL != stylePosition->mPosition) {
// Reset the value
nsStylePosition* mutablePosition = (nsStylePosition*)
pseudoStyleContext->GetMutableStyleData(eStyleStruct_Position);
mutablePosition->mPosition = NS_STYLE_POSITION_NORMAL;
}
// Create a block box or an inline box depending on the value of
// the 'display' property
nsIFrame* containerFrame;
nsFrameItems childFrames;
if (NS_STYLE_DISPLAY_BLOCK == displayValue) {
NS_NewBlockFrame(&containerFrame);
} else {
NS_NewInlineFrame(&containerFrame);
}
containerFrame->Init(*aPresContext, aContent, aFrame, pseudoStyleContext, nsnull);
// Mark the frame as being associated with generated content
nsFrameState frameState;
containerFrame->GetFrameState(&frameState);
frameState |= NS_FRAME_GENERATED_CONTENT;
containerFrame->SetFrameState(frameState);
// Create another pseudo style context to use for all the generated child
// frames
nsIStyleContext* textStyleContext;
aPresContext->ResolvePseudoStyleContextFor(aContent, nsHTMLAtoms::textPseudo,
pseudoStyleContext, PR_FALSE,
&textStyleContext);
// Now create content objects (and child frames) for each value of the
// 'content' property
for (PRUint32 contentIndex = 0; contentIndex < contentCount; contentIndex++) {
nsIFrame* frame;
nsresult result;
// Create a frame
result = CreateGeneratedFrameFor(aPresContext, containerFrame, aContent,
textStyleContext, styleContent,
contentIndex, &frame);
if (NS_SUCCEEDED(result) && frame) {
// Add it to the list of child frames
childFrames.AddChild(frame);
}
}
NS_RELEASE(textStyleContext);
NS_RELEASE(pseudoStyleContext);
if (childFrames.childList) {
containerFrame->SetInitialChildList(*aPresContext, nsnull, childFrames.childList);
}
*aResult = containerFrame;
return PR_TRUE;
}
}
}
return PR_FALSE;
}
/**
* 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
*/
nsresult
nsCSSFrameConstructor::ProcessChildren(nsIPresContext* aPresContext,
nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aFrame,
PRBool aCanHaveGeneratedContent,
nsFrameItems& aFrameItems)
{
nsIStyleContext* styleContext = nsnull;
if (aCanHaveGeneratedContent) {
nsIFrame* generatedFrame;
// Probe for generated content before
aFrame->GetStyleContext(&styleContext);
if (CreateGeneratedContentFrame(aPresContext, aFrame, aContent, styleContext,
nsCSSAtoms::beforePseudo, &generatedFrame)) {
// Add the generated frame to the child list
aFrameItems.AddChild(generatedFrame);
}
}
// Iterate the child content objects and construct frames
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, aState, childContent, aFrame, PR_FALSE, aFrameItems);
}
}
if (aCanHaveGeneratedContent) {
nsIFrame* generatedFrame;
// Probe for generated content after
if (CreateGeneratedContentFrame(aPresContext, aFrame, aContent, styleContext,
nsCSSAtoms::afterPseudo, &generatedFrame)) {
// Add the generated frame to the child list
aFrameItems.AddChild(generatedFrame);
}
}
NS_IF_RELEASE(styleContext);
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
****************************************************/
struct nsTableList {
nsTableList() {
mInner = mChild = nsnull;
}
void Set(nsIFrame* aInner, nsIFrame* aChild) {
mInner = aInner;
mChild = aChild;
}
nsIFrame* mInner;
nsIFrame* mChild;
};
// 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,
nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIStyleContext* aStyleContext,
nsIFrame*& aNewFrame,
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, nsnull);
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
// XXX This is very wrong. You cannot call SetInitialChildList() more
// than once (see the nsIFrame header file). Either call it once only,
// _or_ move the caption out into a separate named child list...
// XXX The other things that's wrong here is that the calls to
// SetInitialChildList() are bottom-up, and the order is wrong...
aNewFrame->SetInitialChildList(*aPresContext, nsnull, innerFrame);
childList = innerFrame;
innerFrame->Init(*aPresContext, aContent, aNewFrame, aStyleContext, nsnull);
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* ignore1;
nsIFrame* ignore2;
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, aState, childContent, aNewFrame,
childStyleContext, ignore1, captionFrame, 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, aState, childContent, innerFrame,
childStyleContext, isRowGroup, childFrame, ignore1,
aTableCreator);
break;
}
case NS_STYLE_DISPLAY_TABLE_ROW:
rv = ConstructTableRowFrame(aPresContext, aState, childContent, innerFrame,
childStyleContext, childFrame, ignore1, aTableCreator);
break;
case NS_STYLE_DISPLAY_TABLE_COLUMN:
rv = ConstructTableColFrame(aPresContext, aState, childContent, innerFrame,
childStyleContext, childFrame, ignore1, aTableCreator);
break;
case NS_STYLE_DISPLAY_TABLE_CELL:
rv = ConstructTableCellFrame(aPresContext, aState, childContent, innerFrame,
childStyleContext, childFrame, ignore1, ignore2, 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, aState, childContent, innerFrame, parentStyleContext,
childItems, 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,
nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIFrame*& aNewTopFrame,
nsIFrame*& aOuterFrame,
nsIFrame*& aInnerFrame,
nsTableCreator& aTableCreator)
{
nsresult rv = NS_OK;
NS_WARNING("an anonymous table frame was created. \n");
nsCOMPtr<nsIStyleContext> parentStyleContext;
aParentFrame->GetStyleContext(getter_AddRefs(parentStyleContext));
const nsStyleDisplay* parentDisplay =
(const nsStyleDisplay*) parentStyleContext->GetStyleData(eStyleStruct_Display);
PRBool cellIsParent = PR_TRUE;
nsIFrame* cellFrame;
nsIFrame* cellBodyFrame;
nsCOMPtr<nsIStyleContext> cellStyleContext;
nsIFrame* ignore;
// construct the ancestors of anonymous table frames
switch(parentDisplay->mDisplay) {
case NS_STYLE_DISPLAY_TABLE_CELL:
break;
case NS_STYLE_DISPLAY_TABLE_ROW: // construct a cell
aPresContext->ResolvePseudoStyleContextFor(aContent, nsHTMLAtoms::tableCellPseudo, parentStyleContext,
PR_FALSE, getter_AddRefs(cellStyleContext));
rv = ConstructTableCellFrame(aPresContext, aState, aContent, aParentFrame, cellStyleContext,
aNewTopFrame, cellFrame, cellBodyFrame, aTableCreator, PR_FALSE);
break;
case NS_STYLE_DISPLAY_TABLE_ROW_GROUP: // construct a row & a cell
case NS_STYLE_DISPLAY_TABLE_HEADER_GROUP:
case NS_STYLE_DISPLAY_TABLE_FOOTER_GROUP:
{
nsIFrame* rowFrame;
nsCOMPtr<nsIStyleContext> rowStyleContext;
aPresContext->ResolvePseudoStyleContextFor(aContent, nsHTMLAtoms::tableRowPseudo,
parentStyleContext, PR_FALSE,
getter_AddRefs(rowStyleContext));
rv = ConstructTableRowFrame(aPresContext, aState, aContent, aParentFrame, rowStyleContext,
aNewTopFrame, rowFrame, aTableCreator);
if (NS_FAILED(rv)) return rv;
aPresContext->ResolvePseudoStyleContextFor(aContent, nsHTMLAtoms::tableCellPseudo, parentStyleContext,
PR_FALSE, getter_AddRefs(cellStyleContext));
rv = ConstructTableCellFrame(aPresContext, aState, aContent, rowFrame, cellStyleContext,
ignore, cellFrame, cellBodyFrame, aTableCreator, PR_FALSE);
rowFrame->SetInitialChildList(*aPresContext, nsnull, cellFrame);
break;
}
case NS_STYLE_DISPLAY_TABLE: // construct a row group, a row, & a cell
{
nsIFrame* groupFrame;
nsCOMPtr<nsIStyleContext> groupStyleContext;
aPresContext->ResolvePseudoStyleContextFor(aContent, nsHTMLAtoms::tableRowGroupPseudo,
parentStyleContext, PR_FALSE,
getter_AddRefs(groupStyleContext));
rv = ConstructTableGroupFrame(aPresContext, aState, aContent, aParentFrame, groupStyleContext,
PR_TRUE, aNewTopFrame, groupFrame, aTableCreator);
if (NS_FAILED(rv)) return rv;
nsIFrame* rowFrame;
nsCOMPtr<nsIStyleContext> rowStyleContext;
aPresContext->ResolvePseudoStyleContextFor(aContent, nsHTMLAtoms::tableRowPseudo,
parentStyleContext, PR_FALSE,
getter_AddRefs(rowStyleContext));
rv = ConstructTableRowFrame(aPresContext, aState, aContent, aParentFrame, rowStyleContext,
ignore, rowFrame, aTableCreator);
if (NS_FAILED(rv)) return rv;
aPresContext->ResolvePseudoStyleContextFor(aContent, nsHTMLAtoms::tableCellPseudo, parentStyleContext,
PR_FALSE, getter_AddRefs(cellStyleContext));
rv = ConstructTableCellFrame(aPresContext, aState, aContent, rowFrame, cellStyleContext,
ignore, cellFrame, cellBodyFrame, aTableCreator, PR_FALSE);
rowFrame->SetInitialChildList(*aPresContext, nsnull, cellFrame);
groupFrame->SetInitialChildList(*aPresContext, nsnull, rowFrame);
break;
}
default:
cellIsParent = PR_FALSE;
}
// create the outer table, inner table frames and make the cell frame the parent of the
// outer frame
if (NS_SUCCEEDED(rv)) {
// create the outer table frame
nsIFrame* tableParent = nsnull;
nsIStyleContext* tableParentSC;
if (cellIsParent) {
tableParent = cellFrame;
tableParentSC = cellStyleContext;
} else {
tableParent = aParentFrame;
tableParentSC = parentStyleContext;
}
nsCOMPtr<nsIStyleContext> outerStyleContext;
aPresContext->ResolvePseudoStyleContextFor(aContent, nsHTMLAtoms::tableOuterPseudo,
tableParentSC, PR_FALSE,
getter_AddRefs(outerStyleContext));
rv = NS_NewTableOuterFrame(&aOuterFrame);
if (NS_FAILED(rv)) return rv;
aOuterFrame->Init(*aPresContext, aContent, tableParent, outerStyleContext,
nsnull);
// create the inner table frame
nsCOMPtr<nsIStyleContext> innerStyleContext;
aPresContext->ResolvePseudoStyleContextFor(aContent, nsHTMLAtoms::tablePseudo,
outerStyleContext, PR_FALSE,
getter_AddRefs(innerStyleContext));
rv = aTableCreator.CreateTableFrame(&aInnerFrame);
if (NS_FAILED(rv)) return rv;
aInnerFrame->Init(*aPresContext, aContent, aOuterFrame, innerStyleContext,
nsnull);
//XXX duplicated call here
aOuterFrame->SetInitialChildList(*aPresContext, nsnull, aInnerFrame);
if (cellIsParent) {
cellBodyFrame->SetInitialChildList(*aPresContext, nsnull, aOuterFrame);
} else {
aNewTopFrame = aOuterFrame;
}
}
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructTableCaptionFrame(nsIPresContext* aPresContext,
nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIStyleContext* aStyleContext,
nsIFrame*& aNewTopFrame,
nsIFrame*& aNewCaptionFrame,
nsTableCreator& aTableCreator)
{
nsresult rv = NS_NewTableCaptionFrame(&aNewCaptionFrame);
if (NS_FAILED(rv)) return rv;
const nsStyleDisplay* parentDisplay = GetDisplay(aParentFrame);
nsIFrame* innerFrame;
if (NS_STYLE_DISPLAY_TABLE == parentDisplay->mDisplay) { // parent is an outer table
// determine the inner table frame, it is either aParentFrame or its first child
nsIFrame* parFrame = aParentFrame;
aParentFrame->FirstChild(nsnull, &innerFrame);
const nsStyleDisplay* innerDisplay;
innerFrame->GetStyleData(eStyleStruct_Display, (const nsStyleStruct *&)innerDisplay);
if (NS_STYLE_DISPLAY_TABLE != innerDisplay->mDisplay) {
innerFrame = aParentFrame;
innerFrame->GetParent(&parFrame);
}
aNewCaptionFrame->Init(*aPresContext, aContent, parFrame, aStyleContext,
nsnull);
innerFrame->SetNextSibling(aNewCaptionFrame);
// the caller is responsible for calling SetInitialChildList on the outer, inner frames
aNewTopFrame = aNewCaptionFrame;
} else { // parent is not a table, need to create a new table
NS_WARNING("a non table contains a table caption child. \n");
nsIFrame* outerFrame;
ConstructAnonymousTableFrame(aPresContext, aState, aContent, aParentFrame,
aNewTopFrame, outerFrame, innerFrame, 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, nsnull);
innerFrame->SetNextSibling(aNewCaptionFrame);
//XXX duplicated call here
outerFrame->SetInitialChildList(*aPresContext, nsnull, innerFrame);
}
nsFrameItems childItems;
nsAbsoluteItems floatingKids(aNewCaptionFrame);
ProcessChildren(aPresContext, aState, aContent, aNewCaptionFrame, PR_TRUE,
childItems);
aNewCaptionFrame->SetInitialChildList(*aPresContext, nsnull, childItems.childList);
if (floatingKids.childList) {
aNewCaptionFrame->SetInitialChildList(*aPresContext,
nsLayoutAtoms::floaterList,
floatingKids.childList);
}
return rv;
}
// if aParentFrame is a table, it is assummed that it is an inner table
nsresult
nsCSSFrameConstructor::ConstructTableGroupFrame(nsIPresContext* aPresContext,
nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIStyleContext* aStyleContext,
PRBool aIsRowGroup,
nsIFrame*& aNewTopFrame,
nsIFrame*& aNewGroupFrame,
nsTableCreator& aTableCreator,
nsTableList* aToDo)
{
nsresult rv = NS_OK;
const nsStyleDisplay* styleDisplay = (const nsStyleDisplay*)
aStyleContext->GetStyleData(eStyleStruct_Display);
nsCOMPtr<nsIStyleContext> styleContext( dont_QueryInterface(aStyleContext) );
// TRUE if we are being called from above, FALSE if from below (e.g. row)
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);
if (!contentDisplayIsGroup) {
NS_ASSERTION(aToDo, "null nsTableList when constructing from below");
}
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) { // called from row below
nsIAtom* pseudoGroup = (aIsRowGroup) ? nsHTMLAtoms::tableRowGroupPseudo : nsHTMLAtoms::tableColGroupPseudo;
aPresContext->ResolvePseudoStyleContextFor(aContent, pseudoGroup, parentStyleContext,
PR_FALSE, getter_AddRefs(styleContext));
}
// only process the group's children if we're called from above
rv = ConstructTableGroupFrameOnly(aPresContext, aState, aContent, aParentFrame,
styleContext, aIsRowGroup, aNewTopFrame, aNewGroupFrame,
aTableCreator, contentDisplayIsGroup);
} else { // construct anonymous frames
NS_WARNING("a non table contains a table row or col group child. \n");
nsIFrame* innerFrame;
nsIFrame* outerFrame;
ConstructAnonymousTableFrame(aPresContext, aState, aContent, aParentFrame, aNewTopFrame,
outerFrame, innerFrame, aTableCreator);
nsCOMPtr<nsIStyleContext> innerStyleContext;
innerFrame->GetStyleContext(getter_AddRefs(innerStyleContext));
if (contentDisplayIsGroup) { // called from above
aPresContext->ResolveStyleContextFor(aContent, innerStyleContext, PR_FALSE,
getter_AddRefs(styleContext));
} else { // called from row below
nsIAtom* pseudoGroup = (aIsRowGroup) ? nsHTMLAtoms::tableRowGroupPseudo : nsHTMLAtoms::tableColGroupPseudo;
aPresContext->ResolvePseudoStyleContextFor(aContent, pseudoGroup, innerStyleContext,
PR_FALSE, getter_AddRefs(styleContext));
}
nsIFrame* topFrame;
// only process the group's children if we're called from above
rv = ConstructTableGroupFrameOnly(aPresContext, aState, aContent, innerFrame,
styleContext, aIsRowGroup, topFrame, aNewGroupFrame,
aTableCreator, contentDisplayIsGroup);
if (NS_FAILED(rv)) return rv;
if (contentDisplayIsGroup) { // called from above
innerFrame->SetInitialChildList(*aPresContext, nsnull, topFrame);
} else { // called from row below
aToDo->Set(innerFrame, topFrame);
}
}
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructTableGroupFrameOnly(nsIPresContext* aPresContext,
nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIStyleContext* aStyleContext,
PRBool aIsRowGroup,
nsIFrame*& aNewTopFrame,
nsIFrame*& aNewGroupFrame,
nsTableCreator& aTableCreator,
PRBool aProcessChildren)
{
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(&aNewTopFrame);
if (NS_FAILED(rv)) return rv;
aNewTopFrame->Init(*aPresContext, aContent, aParentFrame, aStyleContext, nsnull);
// 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_FAILED(rv)) return rv;
// Initialize the frame and force it to have a view
aNewGroupFrame->Init(*aPresContext, aContent, aNewTopFrame, scrolledPseudoStyle,
nsnull);
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, aNewGroupFrame,
scrolledPseudoStyle, PR_TRUE);
aNewTopFrame->SetInitialChildList(*aPresContext, nsnull, aNewGroupFrame);
} else {
rv = (aIsRowGroup) ? aTableCreator.CreateTableRowGroupFrame(&aNewTopFrame)
: aTableCreator.CreateTableColGroupFrame(&aNewTopFrame);
if (NS_FAILED(rv)) return rv;
aNewTopFrame->Init(*aPresContext, aContent, aParentFrame, aStyleContext,
nsnull);
aNewGroupFrame = aNewTopFrame;
}
if (aProcessChildren) {
nsFrameItems childItems;
if (aIsRowGroup) {
TableProcessChildren(aPresContext, aState, aContent, aNewGroupFrame,
childItems, aTableCreator);
} else {
nsAbsoluteItems floatingKids(nsnull);
ProcessChildren(aPresContext, aState, aContent, aNewGroupFrame, PR_FALSE, childItems);
NS_ASSERTION(nsnull == floatingKids.childList, "floater in odd spot");
}
aNewGroupFrame->SetInitialChildList(*aPresContext, nsnull, childItems.childList);
}
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructTableRowFrame(nsIPresContext* aPresContext,
nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIStyleContext* aStyleContext,
nsIFrame*& aNewTopFrame,
nsIFrame*& aNewRowFrame,
nsTableCreator& aTableCreator,
nsTableList* aToDo)
{
nsresult rv = NS_OK;
const nsStyleDisplay* display = (const nsStyleDisplay*)
aStyleContext->GetStyleData(eStyleStruct_Display);
// TRUE if we are being called from above, FALSE if from below (e.g. cell)
PRBool contentDisplayIsRow = (NS_STYLE_DISPLAY_TABLE_ROW == display->mDisplay);
if (!contentDisplayIsRow) {
NS_ASSERTION(aToDo, "null nsTableList when constructing from below");
}
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 we're called from above
rv = ConstructTableRowFrameOnly(aPresContext, aState, aContent, aParentFrame,
styleContext, contentDisplayIsRow, aNewRowFrame,
aTableCreator);
aNewTopFrame = aNewRowFrame;
} else { // construct an anonymous row group frame
nsIFrame* groupFrame;
nsTableList localToDo;
nsTableList* toDo = (aToDo) ? aToDo : &localToDo;
// it may also need to create a table frame
rv = ConstructTableGroupFrame(aPresContext, aState, aContent, aParentFrame, styleContext,
PR_TRUE, aNewTopFrame, groupFrame, aTableCreator, toDo);
if (NS_FAILED(rv)) return rv;
groupFrame->GetStyleContext(getter_AddRefs(groupStyleContext));
if (contentDisplayIsRow) { // called from above
aPresContext->ResolveStyleContextFor(aContent, groupStyleContext,
PR_FALSE, getter_AddRefs(styleContext));
} else { // called from cell below
aPresContext->ResolvePseudoStyleContextFor(aContent, nsHTMLAtoms::tableRowPseudo,
groupStyleContext, PR_FALSE,
getter_AddRefs(styleContext));
}
// only process the row's children if we're called from above
rv = ConstructTableRowFrameOnly(aPresContext, aState, aContent, groupFrame, styleContext,
contentDisplayIsRow, aNewRowFrame, aTableCreator);
if (NS_FAILED(rv)) return rv;
groupFrame->SetInitialChildList(*aPresContext, nsnull, aNewRowFrame);
if (contentDisplayIsRow) { // called from above
TableProcessTableList(aPresContext, *toDo);
}
}
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructTableRowFrameOnly(nsIPresContext* aPresContext,
nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIStyleContext* aStyleContext,
PRBool aProcessChildren,
nsIFrame*& aNewRowFrame,
nsTableCreator& aTableCreator)
{
nsresult rv = aTableCreator.CreateTableRowFrame(&aNewRowFrame);
if (NS_FAILED(rv)) return rv;
aNewRowFrame->Init(*aPresContext, aContent, aParentFrame, aStyleContext,
nsnull);
if (aProcessChildren) {
nsFrameItems childItems;
rv = TableProcessChildren(aPresContext, aState, aContent, aNewRowFrame,
childItems, aTableCreator);
if (NS_FAILED(rv)) return rv;
aNewRowFrame->SetInitialChildList(*aPresContext, nsnull, childItems.childList);
}
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructTableColFrame(nsIPresContext* aPresContext,
nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIStyleContext* aStyleContext,
nsIFrame*& aNewTopFrame,
nsIFrame*& aNewColFrame,
nsTableCreator& aTableCreator)
{
nsresult rv = NS_OK;
// the content display here is always table-col and were always called from above
const nsStyleDisplay* parentDisplay = GetDisplay(aParentFrame);
if (NS_STYLE_DISPLAY_TABLE_COLUMN_GROUP == parentDisplay->mDisplay) {
rv = ConstructTableColFrameOnly(aPresContext, aState, aContent, aParentFrame,
aStyleContext, aNewColFrame, aTableCreator);
aNewTopFrame = aNewColFrame;
} else { // construct anonymous col group frame
nsTableList toDo;
nsIFrame* groupFrame;
rv = ConstructTableGroupFrame(aPresContext, aState, aContent, aParentFrame,
aStyleContext, PR_FALSE, aNewTopFrame, groupFrame,
aTableCreator, &toDo);
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsIStyleContext> groupStyleContext;
groupFrame->GetStyleContext(getter_AddRefs(groupStyleContext));
nsCOMPtr<nsIStyleContext> styleContext;
aPresContext->ResolveStyleContextFor(aContent, groupStyleContext,
PR_FALSE, getter_AddRefs(styleContext));
rv = ConstructTableColFrameOnly(aPresContext, aState, aContent, groupFrame,
styleContext, aNewColFrame, aTableCreator);
if (NS_FAILED(rv)) return rv;
groupFrame->SetInitialChildList(*aPresContext, nsnull, aNewColFrame);
// if an anoymous table got created, then set its initial child list
TableProcessTableList(aPresContext, toDo);
}
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructTableColFrameOnly(nsIPresContext* aPresContext,
nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIStyleContext* aStyleContext,
nsIFrame*& aNewColFrame,
nsTableCreator& aTableCreator)
{
nsresult rv = aTableCreator.CreateTableColFrame(&aNewColFrame);
if (NS_FAILED(rv)) return rv;
aNewColFrame->Init(*aPresContext, aContent, aParentFrame,
aStyleContext, nsnull);
nsFrameItems colChildItems;
nsAbsoluteItems floatingKids(nsnull);
rv = ProcessChildren(aPresContext, aState, aContent, aNewColFrame,
PR_FALSE, colChildItems);
NS_ASSERTION(nsnull == floatingKids.childList, "floater in odd spot");
if (NS_FAILED(rv)) return rv;
aNewColFrame->SetInitialChildList(*aPresContext, nsnull,
colChildItems.childList);
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructTableCellFrame(nsIPresContext* aPresContext,
nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIStyleContext* aStyleContext,
nsIFrame*& aNewTopFrame,
nsIFrame*& aNewCellFrame,
nsIFrame*& aNewCellBodyFrame,
nsTableCreator& aTableCreator,
PRBool aProcessChildren)
{
nsresult rv = NS_OK;
const nsStyleDisplay* display = (const nsStyleDisplay*)
aStyleContext->GetStyleData(eStyleStruct_Display);
// FALSE if we are being called to wrap a cell around the content
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) { // need to wrap
aPresContext->ResolvePseudoStyleContextFor(aContent, nsHTMLAtoms::tableCellPseudo,
parentStyleContext,
PR_FALSE,
getter_AddRefs(styleContext));
wrapContent = PR_TRUE;
}
rv = ConstructTableCellFrameOnly(aPresContext, aState, aContent, aParentFrame,
styleContext, aNewCellFrame, aNewCellBodyFrame,
aTableCreator, aProcessChildren);
aNewTopFrame = aNewCellFrame;
} else { // the cell needs some ancestors to be fabricated
NS_WARNING("WARNING - a non table row contains a table cell child. \n");
nsTableList toDo;
nsIFrame* rowFrame;
rv = ConstructTableRowFrame(aPresContext, aState, aContent, aParentFrame,
aStyleContext, aNewTopFrame, rowFrame, aTableCreator,
&toDo);
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsIStyleContext> rowStyleContext;
rowFrame->GetStyleContext(getter_AddRefs(rowStyleContext));
if (contentDisplayIsCell) {
aPresContext->ResolveStyleContextFor(aContent, rowStyleContext,
PR_FALSE, getter_AddRefs(styleContext));
} else {
wrapContent = PR_TRUE; // XXX
aPresContext->ResolvePseudoStyleContextFor(aContent, nsHTMLAtoms::tableCellPseudo,
rowStyleContext, PR_FALSE,
getter_AddRefs(styleContext));
}
rv = ConstructTableCellFrameOnly(aPresContext, aState, aContent, rowFrame,
styleContext, aNewCellFrame, aNewCellBodyFrame,
aTableCreator, aProcessChildren);
if (NS_FAILED(rv)) return rv;
rowFrame->SetInitialChildList(*aPresContext, nsnull, aNewCellFrame);
TableProcessTableList(aPresContext, toDo);
}
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructTableCellFrameOnly(nsIPresContext* aPresContext,
nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIStyleContext* aStyleContext,
nsIFrame*& aNewCellFrame,
nsIFrame*& aNewCellBodyFrame,
nsTableCreator& aTableCreator,
PRBool aProcessChildren)
{
nsresult rv;
// Create a table cell frame
rv = aTableCreator.CreateTableCellFrame(&aNewCellFrame);
if (NS_FAILED(rv)) return rv;
// Initialize the table cell frame
aNewCellFrame->Init(*aPresContext, aContent, aParentFrame, aStyleContext,
nsnull);
// Create an area frame that will format the cell's content
rv = NS_NewTableCellInnerFrame(&aNewCellBodyFrame);
if (NS_FAILED(rv)) {
aNewCellFrame->DeleteFrame(*aPresContext);
aNewCellFrame = 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));
aNewCellBodyFrame->Init(*aPresContext, aContent, aNewCellFrame,
bodyPseudoStyle, nsnull);
if (aProcessChildren) {
nsFrameItems childItems;
nsAbsoluteItems floaterList(aNewCellBodyFrame);
rv = ProcessChildren(aPresContext, aState, aContent, aNewCellBodyFrame,
PR_TRUE, childItems);
if (NS_FAILED(rv)) return rv;
aNewCellBodyFrame->SetInitialChildList(*aPresContext, nsnull, childItems.childList);
if (floaterList.childList) {
aNewCellBodyFrame->SetInitialChildList(*aPresContext,
nsLayoutAtoms::floaterList,
floaterList.childList);
}
}
aNewCellFrame->SetInitialChildList(*aPresContext, nsnull, aNewCellBodyFrame);
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,
nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsFrameItems& aChildItems,
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, aState, childContent, aParentFrame, parentStyleContext,
aChildItems, aTableCreator);
}
return rv;
}
nsresult
nsCSSFrameConstructor::TableProcessChild(nsIPresContext* aPresContext,
nsFrameConstructorState& aState,
nsIContent* aChildContent,
nsIFrame* aParentFrame,
nsIStyleContext* aParentStyleContext,
nsFrameItems& aChildItems,
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 (IsTableRelated(childDisplay->mDisplay)) {
nsAbsoluteItems floaterList(nsnull);
rv = ConstructFrame(aPresContext, aState, aChildContent, aParentFrame,
PR_FALSE, aChildItems);
NS_ASSERTION(nsnull == floaterList.childList, "floater in odd spot");
} else {
nsCOMPtr<nsIAtom> tag;
aChildContent->GetTag(*getter_AddRefs(tag));
// XXX this needs to be fixed so that the form can work without
// a frame. This is *disgusting*
// forms, form controls need a frame but it can't be a child of an inner table
nsIFormControl* formControl = nsnull;
nsresult fcResult = aChildContent->QueryInterface(kIFormControlIID, (void**)&formControl);
NS_IF_RELEASE(formControl);
if ((nsHTMLAtoms::form == tag.get()) || NS_SUCCEEDED(fcResult)) {
// if the parent is a table, put the form in the outer table frame
const nsStyleDisplay* parentDisplay = (const nsStyleDisplay*)
aParentStyleContext->GetStyleData(eStyleStruct_Display);
nsAbsoluteItems floaterList(nsnull);
if (parentDisplay->mDisplay == NS_STYLE_DISPLAY_TABLE) {
nsIFrame* outerFrame;
aParentFrame->GetParent(&outerFrame);
rv = ConstructFrame(aPresContext, aState, aChildContent, outerFrame,
PR_FALSE, aChildItems);
// XXX: Seems like this is going into the inner frame's child list instead of the outer frame. - DWH
} else {
rv = ConstructFrame(aPresContext, aState, aChildContent, aParentFrame,
PR_FALSE, aChildItems);
}
NS_ASSERTION(nsnull == floaterList.childList, "floater in odd spot");
// 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* cellBodyFrame;
nsIFrame* cellFrame;
nsIFrame* childFrame; // XXX: Need to change the ConstructTableCell function to return lists of frames. - DWH
rv = ConstructTableCellFrame(aPresContext, aState, aChildContent, aParentFrame, childStyleContext,
childFrame, cellFrame, cellBodyFrame, 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::slider == tag.get()) ||
(nsXULAtoms::spinner == tag.get()) ||
(nsXULAtoms::scrollbar == tag.get()) ||
(nsXULAtoms::colorpicker == tag.get()) ||
(nsXULAtoms::fontpicker == 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::deck == tag.get()) ||
(nsXULAtoms::tabcontrol == tag.get()) ||
(nsXULAtoms::tabbox == tag.get()) ||
(nsXULAtoms::tabpanel == tag.get()) ||
(nsXULAtoms::tabpage == tag.get()) ||
(nsXULAtoms::progressmeter == tag.get() )) {
return PR_TRUE;
}
#endif
// we should check for display type as well - later
return PR_FALSE;
}
nsresult
nsCSSFrameConstructor::TableProcessTableList(nsIPresContext* aPresContext,
nsTableList& aTableList)
{
nsresult rv = NS_OK;
nsIFrame* inner = (nsIFrame*)aTableList.mInner;
if (inner) {
nsIFrame* child = (nsIFrame*)aTableList.mChild;
rv = inner->SetInitialChildList(*aPresContext, nsnull, child);
}
return rv;
}
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;
}
PRBool
nsCSSFrameConstructor::IsTableRelated(PRUint8 aDisplay)
{
return (aDisplay == NS_STYLE_DISPLAY_TABLE) ||
(aDisplay == NS_STYLE_DISPLAY_TABLE_HEADER_GROUP) ||
(aDisplay == NS_STYLE_DISPLAY_TABLE_ROW_GROUP) ||
(aDisplay == NS_STYLE_DISPLAY_TABLE_FOOTER_GROUP) ||
(aDisplay == NS_STYLE_DISPLAY_TABLE_ROW) ||
(aDisplay == NS_STYLE_DISPLAY_TABLE_COLUMN) ||
(aDisplay == NS_STYLE_DISPLAY_TABLE_CELL);
}
/***********************************************
* END TABLE SECTION
***********************************************/
nsresult
nsCSSFrameConstructor::ConstructDocElementTableFrame(nsIPresContext* aPresContext,
nsIContent* aDocElement,
nsIFrame* aParentFrame,
nsIFrame*& aNewTableFrame)
{
nsFrameConstructorState state(nsnull, nsnull, nsnull);
nsFrameItems frameItems;
ConstructFrame(aPresContext, state, aDocElement, aParentFrame, PR_FALSE, frameItems);
aNewTableFrame = frameItems.childList;
return NS_OK;
}
nsresult
nsCSSFrameConstructor::ConstructDocElementFrame(nsIPresContext* aPresContext,
nsFrameConstructorState& aState,
nsIContent* aDocElement,
nsIFrame* aParentFrame,
nsIStyleContext* aParentStyleContext,
nsIFrame*& aNewFrame)
{
// Resolve the style context for the document element
nsCOMPtr<nsIStyleContext> styleContext;
aPresContext->ResolveStyleContextFor(aDocElement, aParentStyleContext,
PR_FALSE,
getter_AddRefs(styleContext));
const nsStyleDisplay* display =
(const nsStyleDisplay*)styleContext->GetStyleData(eStyleStruct_Display);
PRBool docElemIsTable = IsTableRelated(display->mDisplay);
// See if we're paginated
PRBool isPaginated;
aPresContext->IsPaginated(&isPaginated);
if (isPaginated) {
if (docElemIsTable) {
nsIFrame* tableFrame;
ConstructDocElementTableFrame(aPresContext, aDocElement, aParentFrame, tableFrame);
mInitialContainingBlock = tableFrame;
aNewFrame = tableFrame;
return NS_OK;
}
// Create an area frame for the document element
nsIFrame* areaFrame;
NS_NewAreaFrame(&areaFrame);
areaFrame->Init(*aPresContext, aDocElement, aParentFrame, styleContext, nsnull);
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, areaFrame,
styleContext, PR_FALSE);
// The area frame is the "initial containing block"
mInitialContainingBlock = areaFrame;
// Process the child content
nsFrameConstructorSaveState absoluteSaveState;
nsFrameConstructorSaveState floaterSaveState;
nsFrameItems childItems;
aState.PushAbsoluteContainingBlock(areaFrame, absoluteSaveState);
aState.PushFloaterContainingBlock(areaFrame, floaterSaveState);
ProcessChildren(aPresContext, aState, aDocElement, areaFrame, PR_TRUE, childItems);
// Set the initial child lists
areaFrame->SetInitialChildList(*aPresContext, nsnull,
childItems.childList);
if (aState.mAbsoluteItems.childList) {
areaFrame->SetInitialChildList(*aPresContext,
nsLayoutAtoms::absoluteList,
aState.mAbsoluteItems.childList);
}
if (aState.mFloatedItems.childList) {
areaFrame->SetInitialChildList(*aPresContext,
nsLayoutAtoms::floaterList,
aState.mFloatedItems.childList);
}
// Return the area frame
aNewFrame = areaFrame;
} else {
// Unless the 'overflow' policy forbids scrolling, wrap the frame in a
// scroll frame.
nsIFrame* scrollFrame = nsnull;
if (IsScrollable(aPresContext, display)) {
NS_NewScrollFrame(&scrollFrame);
scrollFrame->Init(*aPresContext, aDocElement, aParentFrame, styleContext,
nsnull);
// 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;
}
nsIFrame* parFrame = scrollFrame ? scrollFrame : aParentFrame;
nsIFrame* areaFrame;
if (docElemIsTable) {
nsIFrame* tableFrame;
ConstructDocElementTableFrame(aPresContext, aDocElement, parFrame, tableFrame);
mInitialContainingBlock = tableFrame;
aNewFrame = tableFrame;
return NS_OK;
}
// Create an area frame for the document element. This serves as the
// "initial containing block"
// XXX Until we clean up how painting damage is handled, we need to use the
// flag that says that this is the body...
NS_NewDocumentElementFrame(&areaFrame);
areaFrame->Init(*aPresContext, aDocElement, parFrame, styleContext, nsnull);
if (scrollFrame) {
// If the document element is scrollable, then it needs a view. Otherwise,
// don't bother, because the root frame has a view and the extra view is
// just overhead we don't need
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, areaFrame,
styleContext, PR_FALSE);
}
// The area frame is the "initial containing block"
mInitialContainingBlock = areaFrame;
// Process the child content
nsFrameConstructorSaveState absoluteSaveState;
nsFrameConstructorSaveState floaterSaveState;
nsFrameItems childItems;
aState.PushAbsoluteContainingBlock(areaFrame, absoluteSaveState);
aState.PushFloaterContainingBlock(areaFrame, floaterSaveState);
ProcessChildren(aPresContext, aState, aDocElement, areaFrame, PR_TRUE, childItems);
// See if the document element has a fixed background attachment.
// Note: the reason we wait until after processing the document element's
// children is because of special treatment of the background for the HTML
// element. See BodyFixupRule::MapStyleInto() for details
const nsStyleColor* color;
color = (const nsStyleColor*)styleContext->GetStyleData(eStyleStruct_Color);
if (NS_STYLE_BG_ATTACHMENT_FIXED == color->mBackgroundAttachment) {
// Fixed background attachments are handled by setting the
// NS_VIEW_PUBLIC_FLAG_DONT_BITBLT flag bit on the view.
//
// If the document element's frame is scrollable, then set the bit on its
// view; otherwise, set it on the root frame's view. This avoids
// unnecessarily creating another view and should be faster
nsIView* view;
if (scrollFrame) {
areaFrame->GetView(&view);
} else {
nsIFrame* parentFrame;
areaFrame->GetParent(&parentFrame);
parentFrame->GetView(&view);
}
NS_ASSERTION(view, "expected a view");
PRUint32 viewFlags;
view->GetViewFlags(&viewFlags);
view->SetViewFlags(viewFlags | NS_VIEW_PUBLIC_FLAG_DONT_BITBLT);
}
// Set the initial child lists
areaFrame->SetInitialChildList(*aPresContext, nsnull,
childItems.childList);
if (aState.mAbsoluteItems.childList) {
areaFrame->SetInitialChildList(*aPresContext,
nsLayoutAtoms::absoluteList,
aState.mAbsoluteItems.childList);
}
if (aState.mFloatedItems.childList) {
areaFrame->SetInitialChildList(*aPresContext,
nsLayoutAtoms::floaterList,
aState.mFloatedItems.childList);
}
if (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, nsnull);
// 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);
// If the device supports scrolling (e.g., in galley mode on the screen and
// for print-preview, but not when printing), then create a scroll frame that
// will act as the scrolling mechanism for the viewport.
// XXX Do we even need a viewport when printing to a printer?
// XXX It would be nice to have a better way to query for whether the device
// is scrollable
PRBool isScrollable = PR_TRUE;
if (aPresContext) {
nsIDeviceContext* dc;
aPresContext->GetDeviceContext(&dc);
if (dc) {
PRBool supportsWidgets;
if (NS_SUCCEEDED(dc->SupportsNativeWidgets(supportsWidgets))) {
isScrollable = supportsWidgets;
}
NS_RELEASE(dc);
}
}
// As long as the webshell doesn't prohibit it, and the device supports
// it, create a scroll frame that will act as the scolling mechanism for
// the viewport.
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,
nsnull);
// 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, nsnull);
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,
nsnull);
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, nsnull);
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)
{
nsPlaceholderFrame* placeholderFrame;
nsresult rv = NS_NewPlaceholderFrame((nsIFrame**)&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, nsnull);
// Add mapping from absolutely positioned frame to its placeholder frame
nsCOMPtr<nsIPresShell> presShell;
aPresContext->GetShell(getter_AddRefs(presShell));
presShell->SetPlaceholderFrameFor(aFrame, placeholderFrame);
// The placeholder frame has a pointer back to the out-of-flow frame
placeholderFrame->SetOutOfFlowFrame(aFrame);
*aPlaceholderFrame = NS_STATIC_CAST(nsIFrame*, placeholderFrame);
}
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructSelectFrame(nsIPresContext* aPresContext,
nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIAtom* aTag,
nsIStyleContext* aStyleContext,
nsIFrame*& aNewFrame,
PRBool& aProcessChildren,
PRBool aIsAbsolutelyPositioned,
PRBool& aFrameHasBeenInitialized,
PRBool aIsFixedPositioned,
nsFrameItems& aFrameItems)
{
nsresult rv = NS_OK;
nsWidgetRendering mode;
aPresContext->GetWidgetRenderingMode(&mode);
const PRInt32 kNoSizeSpecified = -1;
if (eWidgetRendering_Gfx == mode) {
// Construct a frame-based listbox or combobox
nsIDOMHTMLSelectElement* select = nsnull;
PRInt32 size = 1;
nsresult result = aContent->QueryInterface(kIDOMHTMLSelectElementIID, (void**)&select);
if (NS_OK == result) {
result = select->GetSize(&size);
if ((1 == size) || (kNoSizeSpecified == size)) {
// Construct a frame-based combo box
nsIFrame * comboboxFrame;
rv = NS_NewComboboxControlFrame(&comboboxFrame);
nsIFrame* geometricParent = aParentFrame;
if (aIsAbsolutelyPositioned) {
geometricParent = aState.mAbsoluteItems.containingBlock;
} else if (aIsFixedPositioned) {
geometricParent = aState.mFixedItems.containingBlock;
}
comboboxFrame->Init(*aPresContext, aContent, geometricParent, aStyleContext, nsnull);
nsIComboboxControlFrame* comboBox = nsnull;
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);
}
//XXX: TODO: Make sure that a failure to resolve the following
//pseudo style will still work.
// Set up the Pseudo Style contents
// Dropdown list style
nsCOMPtr<nsIStyleContext> listStyle;
aPresContext->ResolvePseudoStyleContextFor
(aContent, nsHTMLAtoms::dropDownList, aStyleContext, PR_FALSE,
getter_AddRefs(listStyle));
// Dropdown list visible style
nsCOMPtr<nsIStyleContext> visiblePseudoStyle;
aPresContext->ResolvePseudoStyleContextFor
(aContent, nsHTMLAtoms::dropDownVisible, aStyleContext, PR_FALSE,
getter_AddRefs(visiblePseudoStyle));
// Dropdown list hidden style
nsCOMPtr<nsIStyleContext> hiddenPseudoStyle;
aPresContext->ResolvePseudoStyleContextFor
(aContent, nsHTMLAtoms::dropDownHidden, aStyleContext, PR_FALSE,
getter_AddRefs(hiddenPseudoStyle));
// Initialize the scroll frame as absolutely positioned.
InitializeScrollFrame(aPresContext, aState, listFrame, aContent, comboboxFrame,
listStyle, aNewFrame, PR_TRUE, PR_FALSE, PR_TRUE);
// Set flag so the events go to the listFrame not child frames.
// XXX: We should replace this with a real widget manager similar
// to how the nsFormControlFrame works.
// Re-directing events is a temporary Kludge.
nsIView *listView;
listFrame->GetView(&listView);
NS_ASSERTION(nsnull != listView,"ListFrame's view is nsnull");
listView->SetViewFlags(NS_VIEW_PUBLIC_FLAG_DONT_CHECK_CHILDREN);
// Set initial visibility to hidden for the drop-down list
// XXX: This should not be necessary. Need to restructure the combo box as follows:
// Derive nsComboboxFrame from nsAreaFrame. Attach the placeholder frame, a label frame and
// a button frame. Override reresolve style context and reresolve the style on the ListBox.
// The event state manager should then be asked to set active and non-active based on
// The mouse click this would get rid of all of the ugly code here. The setting of the active
// Should cause re-resolution of the AreaFrame which will re-sync it. KMM.
listFrame->ReResolveStyleContext(aPresContext, hiddenPseudoStyle, NS_STYLE_HINT_NONE, nsnull, nsnull);
listView->SetVisibility(nsViewVisibility_kHide);
// Create a place holder frame for the dropdown list
nsIFrame* placeholderFrame = nsnull;
CreatePlaceholderFrameFor(aPresContext, aContent, aNewFrame, aStyleContext,
aParentFrame, &placeholderFrame);
aFrameItems.AddChild(placeholderFrame);
// Add the absolutely positioned frame to its containing block's list
// of child frames
aState.mAbsoluteItems.AddChild(listFrame);
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 for combo box button pressed and
// out.
//XXX: TODO: Make this work even if resolving the pseudo style fails.
nsCOMPtr<nsIStyleContext> outPseudoStyle;
aPresContext->ResolvePseudoStyleContextFor
(aContent, nsHTMLAtoms::dropDownBtnOut, aStyleContext, PR_FALSE,
getter_AddRefs(outPseudoStyle));
nsCOMPtr<nsIStyleContext> pressPseudoStyle;
aPresContext->ResolvePseudoStyleContextFor(aContent, nsHTMLAtoms::dropDownBtnPressed,
aStyleContext, PR_FALSE, getter_AddRefs(pressPseudoStyle));
comboBox->SetDropDownStyleContexts(visiblePseudoStyle, hiddenPseudoStyle);
comboBox->SetButtonStyleContexts(outPseudoStyle, pressPseudoStyle);
nsIFrame* frame = nsnull;
if (NS_OK == comboboxFrame->QueryInterface(kIFrameIID, (void**)&frame)) {
nsFrameItems childItems;
frame->SetInitialChildList(*aPresContext, nsnull,
childItems.childList);
}
aProcessChildren = PR_FALSE;
//XXX: TODO: Need to set an option on the view that was created for the dropdown list
//to be a borderless top-level window.
aNewFrame = comboboxFrame;
aFrameHasBeenInitialized = PR_TRUE;
}
} else {
// Construct a frame-based list box
nsIFrame * listFrame;
rv = NS_NewListControlFrame(&listFrame);
aNewFrame = listFrame;
InitializeScrollFrame(aPresContext, aState, listFrame, aContent, aParentFrame,
aStyleContext, aNewFrame, aIsAbsolutelyPositioned, PR_FALSE,
PR_TRUE);
// Set flag so the events go to the listFrame not child frames.
// XXX: We should replace this with a real widget manager similar
// to how the nsFormControlFrame works.
// Re-directing events is a temporary Kludge.
nsIView *listView;
listFrame->GetView(&listView);
NS_ASSERTION(nsnull != listView,"ListFrame's view is nsnull");
listView->SetViewFlags(NS_VIEW_PUBLIC_FLAG_DONT_CHECK_CHILDREN);
aFrameHasBeenInitialized = PR_TRUE;
}
NS_RELEASE(select);
} else {
rv = NS_NewSelectControlFrame(&aNewFrame);
}
}
else {
// Not frame based. Use a SelectFrame which creates a native widget.
rv = NS_NewSelectControlFrame(&aNewFrame);
}
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructFrameByTag(nsIPresContext* aPresContext,
nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIAtom* aTag,
nsIStyleContext* aStyleContext,
nsFrameItems& aFrameItems)
{
PRBool processChildren = PR_FALSE; // whether we should process child content
PRBool isAbsolutelyPositioned = PR_FALSE;
PRBool isFixedPositioned = PR_FALSE;
PRBool isFloating = PR_FALSE;
PRBool canBePositioned = PR_TRUE;
PRBool frameHasBeenInitialized = PR_FALSE;
nsIFrame* newFrame = nsnull; // the frame we construct
PRBool newFrameIsFloaterContainer = PR_FALSE;
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);
const nsStyleDisplay* display = (const nsStyleDisplay*)
aStyleContext->GetStyleData(eStyleStruct_Display);
if (NS_STYLE_POSITION_ABSOLUTE == position->mPosition) {
isAbsolutelyPositioned = PR_TRUE;
}
else if (NS_STYLE_POSITION_FIXED == position->mPosition) {
isFixedPositioned = PR_TRUE;
}
else if (NS_STYLE_FLOAT_NONE != display->mFloats) {
isFloating = 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;
}
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, aState, aContent, aParentFrame,
aTag, aStyleContext, newFrame, processChildren,
isAbsolutelyPositioned, frameHasBeenInitialized,
isFixedPositioned, aFrameItems);
}
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);
}
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);
// the html4 button needs to act just like a
// regular button except contain html content
// so it must be replaced or html outside it will
// draw into its borders. -EDV
isReplaced = PR_TRUE;
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 = aState.mAbsoluteItems.containingBlock;
} else if (isFixedPositioned) {
geometricParent = aState.mFixedItems.containingBlock;
}
}
newFrame->Init(*aPresContext, aContent, geometricParent, aStyleContext,
nsnull);
// 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;
nsAbsoluteItems floaterList(newFrame);
if (processChildren) {
if (newFrameIsFloaterContainer) {
rv = ProcessChildren(aPresContext, aState, aContent, newFrame,
PR_TRUE, childItems);
}
else {
rv = ProcessChildren(aPresContext, aState, aContent, newFrame,
PR_TRUE, childItems);
}
}
// Set the frame's initial child list
newFrame->SetInitialChildList(*aPresContext, nsnull, childItems.childList);
// Set the frame's floating child list, too
if (floaterList.childList) {
newFrame->SetInitialChildList(*aPresContext,
nsLayoutAtoms::floaterList,
floaterList.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) {
aState.mAbsoluteItems.AddChild(newFrame);
} else {
aState.mFixedItems.AddChild(newFrame);
}
// Add the placeholder frame to the flow
aFrameItems.AddChild(placeholderFrame);
} else if (isFloating) {
nsIFrame* placeholderFrame;
CreatePlaceholderFrameFor(aPresContext, aContent, newFrame,
aStyleContext, aParentFrame, &placeholderFrame);
// Add the floating frame to its containing block's list of child frames
aState.mFloatedItems.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,
nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIAtom* aTag,
nsIStyleContext* aStyleContext,
nsFrameItems& aFrameItems,
PRBool& haltProcessing)
{
PRBool processChildren = PR_FALSE; // whether we should process child content
nsresult rv = NS_OK;
PRBool isAbsolutelyPositioned = PR_FALSE;
PRBool isFixedPositioned = PR_FALSE;
PRBool isReplaced = 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_NewTriStateCheckboxFrame(&newFrame);
else if (aTag == nsXULAtoms::slider)
rv = NS_NewSliderFrame(&newFrame);
else if (aTag == nsXULAtoms::spinner)
rv = NS_NewSpinnerFrame(&newFrame);
else if (aTag == nsXULAtoms::scrollbar)
rv = NS_NewScrollbarFrame(&newFrame);
else if (aTag == nsXULAtoms::colorpicker)
rv = NS_NewColorPickerFrame(&newFrame);
else if (aTag == nsXULAtoms::fontpicker)
rv = NS_NewFontPickerFrame(&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 = aState.mAbsoluteItems.containingBlock;
}
if (NS_STYLE_POSITION_FIXED == position->mPosition) {
isFixedPositioned = PR_TRUE;
aParentFrame = aState.mFixedItems.containingBlock;
}
rv = ConstructTableFrame(aPresContext, aState, aContent, geometricParent, aStyleContext,
newFrame, 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) {
aState.mAbsoluteItems.AddChild(newFrame);
} else {
aState.mFixedItems.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, aState, aContent, aParentFrame, aStyleContext,
newFrame, ignore, 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)
{
// Always build rows. Rely on style rules to hide frames.
// Rely on RDF trickery to hide synthetic content from the content model.
nsFrameConstructorSaveState floaterSaveState;
aState.PushFloaterContainingBlock(nsnull, floaterSaveState);
rv = ProcessChildren(aPresContext, aState, childContent, aParentFrame,
PR_FALSE, aFrameItems);
NS_ASSERTION(!aState.mFloatedItems.childList, "floater in odd spot");
}
}
}
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"));
nsIFrame* ignore2;
rv = ConstructTableCellFrame(aPresContext, aState, aContent, aParentFrame, aStyleContext,
newFrame, ignore, ignore2, 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;
isReplaced = PR_TRUE;
rv = NS_NewProgressMeterFrame(&newFrame);
}
// End of PROGRESS METER CONSTRUCTION logic
// BOX CONSTRUCTION
else if (aTag == nsXULAtoms::box || aTag == nsXULAtoms::tabbox || aTag == nsXULAtoms::tabpage || aTag == nsXULAtoms::tabcontrol) {
processChildren = PR_TRUE;
isReplaced = PR_TRUE;
rv = NS_NewBoxFrame(&newFrame);
}
// End of BOX CONSTRUCTION logic
// TITLED BUTTON CONSTRUCTION
else if (aTag == nsXULAtoms::titledbutton) {
processChildren = PR_TRUE;
isReplaced = PR_TRUE;
rv = NS_NewTitledButtonFrame(&newFrame);
}
// End of TITLED BUTTON CONSTRUCTION logic
// DECK CONSTRUCTION
else if (aTag == nsXULAtoms::deck || aTag == nsXULAtoms::tabpanel) {
processChildren = PR_TRUE;
isReplaced = PR_TRUE;
rv = NS_NewDeckFrame(&newFrame);
}
// End of DECK CONSTRUCTION logic
// TAB CONSTRUCTION
else if (aTag == nsXULAtoms::tab) {
processChildren = PR_TRUE;
isReplaced = PR_TRUE;
rv = NS_NewTabFrame(&newFrame);
}
// End of TAB 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) {
// 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);
}
nsIFrame* geometricParent = isAbsolutelyPositioned
? aState.mAbsoluteItems.containingBlock
: aParentFrame;
newFrame->Init(*aPresContext, aContent, geometricParent, aStyleContext,
nsnull);
// 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, aState, aContent, newFrame, PR_FALSE,
childItems);
}
// 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) {
aState.mAbsoluteItems.AddChild(newFrame);
} else {
aState.mFixedItems.AddChild(newFrame);
}
// Add the placeholder frame to the flow
aFrameItems.AddChild(placeholderFrame);
}
}
return rv;
}
#endif
nsresult
nsCSSFrameConstructor::InitializeScrollFrame(nsIPresContext* aPresContext,
nsFrameConstructorState& aState,
nsIFrame* scrollFrame,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIStyleContext* aStyleContext,
nsIFrame*& aNewFrame,
PRBool aIsAbsolutelyPositioned,
PRBool aIsFixedPositioned,
PRBool aCreateBlock)
{
// Initialize it
nsIFrame* geometricParent = aParentFrame;
if (aIsAbsolutelyPositioned) {
geometricParent = aState.mAbsoluteItems.containingBlock;
} else if (aIsFixedPositioned) {
geometricParent = aState.mFixedItems.containingBlock;
}
scrollFrame->Init(*aPresContext, aContent, geometricParent, aStyleContext,
nsnull);
// 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, nsnull);
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, scrolledFrame,
scrolledPseudoStyle, PR_TRUE);
// Process children
nsAbsoluteItems floaterList(scrolledFrame);
if (aIsAbsolutelyPositioned || aIsFixedPositioned) {
// The area frame becomes a container for child frames that are
// absolutely positioned
nsAbsoluteItems absoluteItems(scrolledFrame);
nsFrameItems childItems;
ProcessChildren(aPresContext, aState, aContent, scrolledFrame, PR_FALSE,
childItems);
// Set the initial child lists
scrolledFrame->SetInitialChildList(*aPresContext, nsnull,
childItems.childList);
if (nsnull != absoluteItems.childList) {
scrolledFrame->SetInitialChildList(*aPresContext,
nsLayoutAtoms::absoluteList,
absoluteItems.childList);
}
if (floaterList.childList) {
scrolledFrame->SetInitialChildList(*aPresContext,
nsLayoutAtoms::floaterList,
floaterList.childList);
}
} else {
nsFrameItems childItems;
ProcessChildren(aPresContext, aState, aContent, scrolledFrame, PR_FALSE,
childItems);
// Set the initial child lists
scrolledFrame->SetInitialChildList(*aPresContext, nsnull,
childItems.childList);
if (floaterList.childList) {
scrolledFrame->SetInitialChildList(*aPresContext,
nsLayoutAtoms::floaterList,
floaterList.childList);
}
}
scrollFrame->SetInitialChildList(*aPresContext, nsnull, scrolledFrame);
aNewFrame = scrollFrame;
return NS_OK;
}
nsresult
nsCSSFrameConstructor::ConstructFrameByDisplayType(nsIPresContext* aPresContext,
nsFrameConstructorState& aState,
const nsStyleDisplay* aDisplay,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIStyleContext* aStyleContext,
PRBool aHaveFirstLetterStyle,
nsFrameItems& aFrameItems)
{
PRBool isAbsolutelyPositioned = PR_FALSE;
PRBool isFixedPositioned = PR_FALSE;
PRBool isFloating = 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_FLOAT_NONE != aDisplay->mFloats) {
isFloating = PR_TRUE;
}
if ((NS_STYLE_DISPLAY_INLINE == aDisplay->mDisplay) &&
(isFloating || position->IsAbsolutelyPositioned())) {
isBlock = PR_TRUE;
}
// If the frame is a block-level frame and is scrollable, then wrap it
// in a scroll frame.
// 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(aPresContext, aState, scrollFrame, aContent, aParentFrame,
aStyleContext, newFrame, isAbsolutelyPositioned, isFixedPositioned,
PR_FALSE);
}
// 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 a frame to wrap up the absolute positioned item
NS_NewAbsoluteItemWrapperFrame(&newFrame);
newFrame->Init(*aPresContext, aContent,
(isAbsolutelyPositioned
? aState.mAbsoluteItems.containingBlock
: aState.mFixedItems.containingBlock),
aStyleContext, nsnull);
// 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
nsFrameConstructorSaveState absoluteSaveState;
nsFrameConstructorSaveState floaterSaveState;
nsFrameItems childItems;
aState.PushAbsoluteContainingBlock(newFrame, absoluteSaveState);
aState.PushFloaterContainingBlock(newFrame, floaterSaveState);
ProcessChildren(aPresContext, aState, aContent, newFrame, PR_TRUE,
childItems);
// Set the frame's initial child list(s)
newFrame->SetInitialChildList(*aPresContext, nsnull, childItems.childList);
if (aState.mAbsoluteItems.childList) {
newFrame->SetInitialChildList(*aPresContext, nsLayoutAtoms::absoluteList,
aState.mAbsoluteItems.childList);
}
if (aState.mFloatedItems.childList) {
newFrame->SetInitialChildList(*aPresContext,
nsLayoutAtoms::floaterList,
aState.mFloatedItems.childList);
}
}
// See if the frame is floated, and it's a block or inline frame
else if (isFloating &&
((NS_STYLE_DISPLAY_BLOCK == aDisplay->mDisplay) ||
(NS_STYLE_DISPLAY_INLINE == aDisplay->mDisplay) ||
(NS_STYLE_DISPLAY_LIST_ITEM == aDisplay->mDisplay))) {
// Create an area frame
NS_NewFloatingItemWrapperFrame(&newFrame);
// Initialize the frame
newFrame->Init(*aPresContext, aContent, aParentFrame, aStyleContext, nsnull);
// See if we need to create a view
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, newFrame,
aStyleContext, PR_FALSE);
// Process the child content
nsFrameConstructorSaveState floaterSaveState;
nsFrameItems childItems;
aState.PushFloaterContainingBlock(newFrame, floaterSaveState);
ProcessChildren(aPresContext, aState, aContent, newFrame, PR_TRUE, childItems);
// Set the frame's initial child list(s)
newFrame->SetInitialChildList(*aPresContext, nsnull, childItems.childList);
if (aState.mFloatedItems.childList) {
newFrame->SetInitialChildList(*aPresContext,
nsLayoutAtoms::floaterList,
aState.mFloatedItems.childList);
}
}
// See if it's relatively positioned
else if (NS_STYLE_POSITION_RELATIVE == position->mPosition) {
// Is it block-level or inline-level?
if (NS_STYLE_DISPLAY_BLOCK == aDisplay->mDisplay) {
// Create a wrapper frame. No space manager, though
NS_NewRelativeItemWrapperFrame(&newFrame);
} else {
// Create a positioned inline frame
NS_NewPositionedInlineFrame(&newFrame);
}
// Initialize the frame
newFrame->Init(*aPresContext, aContent, aParentFrame, aStyleContext, nsnull);
// 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
nsFrameConstructorSaveState absoluteSaveState;
nsFrameConstructorSaveState floaterSaveState;
nsFrameItems childItems;
aState.PushAbsoluteContainingBlock(newFrame, absoluteSaveState);
if (NS_STYLE_DISPLAY_BLOCK == aDisplay->mDisplay) {
aState.PushFloaterContainingBlock(newFrame, floaterSaveState);
ProcessChildren(aPresContext, aState, aContent, newFrame, PR_TRUE,
childItems);
} else {
ProcessChildren(aPresContext, aState, aContent, newFrame, PR_TRUE,
childItems);
}
// Set the frame's initial child list
newFrame->SetInitialChildList(*aPresContext, nsnull, childItems.childList);
if (aState.mAbsoluteItems.childList) {
newFrame->SetInitialChildList(*aPresContext, nsLayoutAtoms::absoluteList,
aState.mAbsoluteItems.childList);
}
if ((NS_STYLE_DISPLAY_BLOCK == aDisplay->mDisplay) && aState.mFloatedItems.childList) {
newFrame->SetInitialChildList(*aPresContext,
nsLayoutAtoms::floaterList,
aState.mFloatedItems.childList);
}
}
// otherwise let the display property influence the frame type to create
else {
PRBool processChildren = PR_FALSE; // whether we should process child content
PRBool newFrameIsFloaterContainer = PR_FALSE;
PRBool haveFirstLetterStyle = PR_FALSE;
nsIFrame* ignore;
// Use the 'display' property to choose 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);
processChildren = PR_TRUE;
newFrameIsFloaterContainer = PR_TRUE;
if (NS_SUCCEEDED(rv)) {
// See if the block has first-letter style applied to it...
haveFirstLetterStyle = HaveFirstLetterStyle(aPresContext, aContent,
aStyleContext);
}
break;
case NS_STYLE_DISPLAY_INLINE:
rv = NS_NewInlineFrame(&newFrame);
processChildren = PR_TRUE;
haveFirstLetterStyle = aHaveFirstLetterStyle;
break;
case NS_STYLE_DISPLAY_TABLE:
{
nsIFrame* geometricParent = aParentFrame;
if (NS_STYLE_POSITION_ABSOLUTE == position->mPosition) {
isAbsolutelyPositioned = PR_TRUE;
aParentFrame = aState.mAbsoluteItems.containingBlock;
}
if (NS_STYLE_POSITION_FIXED == position->mPosition) {
isFixedPositioned = PR_TRUE;
aParentFrame = aState.mFixedItems.containingBlock;
}
rv = ConstructTableFrame(aPresContext, aState, aContent, geometricParent,
aStyleContext, newFrame, tableCreator);
// Note: table construction function takes care of initializing
// the frame, processing children, and setting the initial child
// list
goto nearly_done;
}
// 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, aState, aContent, aParentFrame,
aStyleContext, newFrame, ignore, 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, aState, aContent, aParentFrame,
aStyleContext, isRowGroup, newFrame, ignore, tableCreator);
aFrameItems.AddChild(newFrame);
return rv;
}
case NS_STYLE_DISPLAY_TABLE_COLUMN:
rv = ConstructTableColFrame(aPresContext, aState, aContent, aParentFrame, aStyleContext,
newFrame, ignore, tableCreator);
aFrameItems.AddChild(newFrame);
return rv;
case NS_STYLE_DISPLAY_TABLE_ROW:
rv = ConstructTableRowFrame(aPresContext, aState, aContent, aParentFrame, aStyleContext,
newFrame, ignore, tableCreator);
aFrameItems.AddChild(newFrame);
return rv;
case NS_STYLE_DISPLAY_TABLE_CELL:
{
nsIFrame* ignore2;
rv = ConstructTableCellFrame(aPresContext, aState, aContent, aParentFrame, aStyleContext,
newFrame, ignore, ignore2, 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, nsnull);
// 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) {
if (newFrameIsFloaterContainer) {
nsFrameConstructorSaveState floaterSaveState;
aState.PushFloaterContainingBlock(newFrame, floaterSaveState);
if (haveFirstLetterStyle) {
rv = ProcessBlockChildren(aPresContext, aState, aContent, newFrame,
childItems, PR_TRUE, PR_TRUE);
}
else {
rv = ProcessChildren(aPresContext, aState, aContent, newFrame,
PR_TRUE, childItems);
}
// Set the frame's initial child list
newFrame->SetInitialChildList(*aPresContext, nsnull,
childItems.childList);
if (aState.mFloatedItems.childList) {
newFrame->SetInitialChildList(*aPresContext,
nsLayoutAtoms::floaterList,
aState.mFloatedItems.childList);
}
}
else {
if (haveFirstLetterStyle) {
rv = ProcessBlockChildren(aPresContext, aState, aContent, newFrame,
childItems, PR_TRUE, PR_FALSE);
}
else {
rv = ProcessChildren(aPresContext, aState, aContent, newFrame,
PR_TRUE, childItems);
}
// Set the frame's initial child list
newFrame->SetInitialChildList(*aPresContext, nsnull,
childItems.childList);
}
}
}
}
// If the frame is absolutely positioned, then create a placeholder frame
nearly_done:
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) {
aState.mAbsoluteItems.AddChild(newFrame);
} else {
aState.mFixedItems.AddChild(newFrame);
}
// Add the placeholder frame to the flow
aFrameItems.AddChild(placeholderFrame);
} else if (isFloating) {
nsIFrame* placeholderFrame;
CreatePlaceholderFrameFor(aPresContext, aContent, newFrame,
aStyleContext, aParentFrame, &placeholderFrame);
// Add the floating frame to its containing block's list of child frames
aState.mFloatedItems.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 { // else the child is a caption and really belongs to the outer table frame
nsIFrame* parFrame = nsnull;
aCurrentParentFrame->GetParent(&parFrame);
const nsStyleDisplay* parDisplay;
aCurrentParentFrame->GetStyleData(eStyleStruct_Display, (const nsStyleStruct *&)parDisplay);
if (NS_STYLE_DISPLAY_TABLE == parDisplay->mDisplay) {
aNewParentFrame = parFrame; // aNewParentFrame was an inner 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 if (nsLayoutAtoms::processingInstructionTagName == 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::processingInstructionPseudo,
parentStyleContext,
PR_FALSE,
aStyleContext);
} else {
rv = aPresContext->ResolveStyleContextFor(aContent, parentStyleContext,
PR_FALSE,
aStyleContext);
}
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructFrame(nsIPresContext* aPresContext,
nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
PRBool aHaveFirstLetterStyle,
nsFrameItems& aFrameItems)
{
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));
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, aState, aContent, aParentFrame,
tag, styleContext, aFrameItems);
#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, aState, aContent, aParentFrame,
tag, styleContext, aFrameItems, 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, aState, display, aContent,
aParentFrame, styleContext,
aHaveFirstLetterStyle, aFrameItems);
}
}
}
return rv;
}
NS_IMETHODIMP
nsCSSFrameConstructor::ReconstructDocElementHierarchy(nsIPresContext* aPresContext)
{
nsresult rv = NS_OK;
if (nsnull != mDocument) {
nsCOMPtr<nsIContent> rootContent(dont_AddRef(mDocument->GetRootContent()));
if (rootContent) {
nsCOMPtr<nsIPresShell> shell;
rv = aPresContext->GetShell(getter_AddRefs(shell));
if (NS_SUCCEEDED(rv)) {
nsIFrame* docElementFrame;
// Get the frame that corresponds to the document element
shell->GetPrimaryFrameFor(rootContent, &docElementFrame);
if (nsnull != docElementFrame) {
nsIFrame* docParentFrame;
docElementFrame->GetParent(&docParentFrame);
if (nsnull != docParentFrame) {
// Remove the old document element hieararchy
rv = docParentFrame->RemoveFrame(*aPresContext,
*shell,
nsnull,
docElementFrame);
// XXX Remove any existing fixed items...
if (NS_SUCCEEDED(rv)) {
nsIFrame* newChild;
nsCOMPtr<nsIStyleContext> rootPseudoStyle;
nsFrameConstructorState state(mFixedContainingBlock, nsnull, nsnull);
docParentFrame->GetStyleContext(getter_AddRefs(rootPseudoStyle));
rv = ConstructDocElementFrame(aPresContext, state, rootContent,
docParentFrame, rootPseudoStyle,
newChild);
if (NS_SUCCEEDED(rv)) {
rv = docParentFrame->InsertFrames(*aPresContext, *shell, nsnull,
nsnull, newChild);
// Tell the fixed containing block about its 'fixed' frames
if (state.mFixedItems.childList) {
mFixedContainingBlock->InsertFrames(*aPresContext, *shell,
nsLayoutAtoms::fixedList, nsnull, state.mFixedItems.childList);
}
}
}
}
}
}
}
}
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);
}
// if we get an outer table frame use its 1st child which is a table inner frame
// if we get a table cell frame use its 1st child which is an area frame
else if ((NS_STYLE_DISPLAY_TABLE == display->mDisplay) ||
(NS_STYLE_DISPLAY_TABLE_CELL == display->mDisplay)) {
frame->FirstChild(nsnull, &frame);
}
}
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 or
// relatively positioned
nsIFrame* containingBlock = nsnull;
for (nsIFrame* frame = aFrame; frame; frame->GetParent(&frame)) {
const nsStylePosition* position;
// Is it positioned?
frame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct*&)position);
if ((position->mPosition == NS_STYLE_POSITION_ABSOLUTE) ||
(position->mPosition == NS_STYLE_POSITION_RELATIVE)) {
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
frame->GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&)display);
if (display->mDisplay != NS_STYLE_DISPLAY_TABLE) {
nsIAtom* frameType;
frame->GetFrameType(&frameType);
if (nsLayoutAtoms::scrollFrame == frameType) {
// We want the scrolled frame, not the scroll frame
nsIFrame* scrolledFrame;
frame->FirstChild(nsnull, &scrolledFrame);
NS_RELEASE(frameType);
if (scrolledFrame) {
scrolledFrame->GetFrameType(&frameType);
if (nsLayoutAtoms::areaFrame == frameType) {
containingBlock = scrolledFrame;
}
}
} else if ((nsLayoutAtoms::areaFrame == frameType) ||
(nsLayoutAtoms::positionedInlineFrame == frameType)) {
containingBlock = frame;
}
NS_RELEASE(frameType);
}
}
// See if we found a containing block
if (containingBlock) {
break;
}
}
// If we didn't find an absolutely positioned containing block, then use the
// initial containing block
if (!containingBlock) {
containingBlock = mInitialContainingBlock;
}
return containingBlock;
}
nsIFrame*
nsCSSFrameConstructor::GetFloaterContainingBlock(nsIPresContext* aPresContext,
nsIFrame* aFrame)
{
NS_PRECONDITION(mInitialContainingBlock, "no initial containing block");
// Starting with aFrame, look for a frame that is a real block frame
nsIFrame* containingBlock = aFrame;
while (nsnull != containingBlock) {
const nsStyleDisplay* display;
containingBlock->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&)display);
if ((NS_STYLE_DISPLAY_BLOCK == display->mDisplay) ||
(NS_STYLE_DISPLAY_LIST_ITEM == display->mDisplay)) {
break;
}
// Continue walking up the hierarchy
containingBlock->GetParent(&containingBlock);
}
// If we didn't find a containing block, then use the initial
// containing block
if (nsnull == containingBlock) {
containingBlock = mInitialContainingBlock;
}
return containingBlock;
}
// Helper function to determine whether a given frame is generated content
// for the specified content object. Returns PR_TRUE if the frame is associated
// with generated content and PR_FALSE otherwise
static inline PRBool
IsGeneratedContentFor(nsIContent* aContent, nsIFrame* aFrame)
{
nsFrameState state;
PRBool result = PR_FALSE;
// First check the frame state bit
aFrame->GetFrameState(&state);
if (state & NS_FRAME_GENERATED_CONTENT) {
nsIContent* content;
// Check that it has the same content pointer
aFrame->GetContent(&content);
result = (content == aContent);
NS_IF_RELEASE(content);
}
return result;
}
// This function is called by ContentAppended() and ContentInserted() when
// appending flowed frames to a parent's principal child list. It handles the
// case where the parent frame has :after pseudo-element generated content
nsresult
nsCSSFrameConstructor::AppendFrames(nsIPresContext* aPresContext,
nsIPresShell* aPresShell,
nsIContent* aContainer,
nsIFrame* aParentFrame,
nsIFrame* aFrameList)
{
nsIFrame* firstChild;
aParentFrame->FirstChild(nsnull, &firstChild);
nsFrameList frames(firstChild);
nsIFrame* lastChild = frames.LastChild();
// See if the parent has an :after pseudo-element
if (lastChild && IsGeneratedContentFor(aContainer, lastChild)) {
// Insert the frames before the :after pseudo-element
return aParentFrame->InsertFrames(*aPresContext, *aPresShell,
nsnull, frames.GetPrevSiblingFor(lastChild),
aFrameList);
}
// Append the frames to the end of the parent's child list
return aParentFrame->AppendFrames(*aPresContext, *aPresShell,
nsnull, aFrameList);
}
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;
}
}
// Create some new frames
PRInt32 count;
nsIFrame* firstAppendedFrame = nsnull;
nsFrameItems frameItems;
nsFrameConstructorState state(mFixedContainingBlock,
GetAbsoluteContainingBlock(aPresContext, parentFrame),
GetFloaterContainingBlock(aPresContext, parentFrame));
aContainer->ChildCount(count);
for (PRInt32 i = aNewIndexInContainer; i < count; i++) {
nsCOMPtr<nsIContent> child;
aContainer->ChildAt(i, *getter_AddRefs(child));
ConstructFrame(aPresContext, state, child, parentFrame, PR_FALSE, frameItems);
}
// 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)) {
// Append the flowed frames to the principal child list
AppendFrames(aPresContext, shell, aContainer, adjustedParentFrame,
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 (state.mAbsoluteItems.childList) {
state.mAbsoluteItems.containingBlock->AppendFrames(*aPresContext, *shell,
nsLayoutAtoms::absoluteList,
state.mAbsoluteItems.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 (state.mFixedItems.childList) {
state.mFixedItems.containingBlock->AppendFrames(*aPresContext, *shell,
nsLayoutAtoms::fixedList,
state.mFixedItems.childList);
}
// If there are new floating 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 (state.mFloatedItems.childList) {
state.mFloatedItems.containingBlock->AppendFrames(*aPresContext, *shell,
nsLayoutAtoms::floaterList,
state.mFloatedItems.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);
// Did we really get the *right* frame?
const nsStyleDisplay* display;
prevSibling->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&)display);
if (display->IsFloating()) {
// Nope. Get the place-holder instead
nsIFrame* placeholderFrame;
aPresShell->GetPlaceholderFrameFor(prevSibling, &placeholderFrame);
NS_ASSERTION(nsnull != placeholderFrame, "yikes");
prevSibling = placeholderFrame;
}
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 first-in-flow
nsIFrame* prevInFlow;
do {
nextSibling->GetPrevInFlow(&prevInFlow);
if (nsnull != prevInFlow) {
nextSibling = prevInFlow;
}
} while (nsnull != prevInFlow);
// Did we really get the *right* frame?
const nsStyleDisplay* display;
nextSibling->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&)display);
if (display->IsFloating()) {
// Nope. Get the place-holder instead
nsIFrame* placeholderFrame;
aPresShell->GetPlaceholderFrameFor(nextSibling, &placeholderFrame);
NS_ASSERTION(nsnull != placeholderFrame, "yikes");
nextSibling = placeholderFrame;
}
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;
nsFrameConstructorState state(mFixedContainingBlock, nsnull, nsnull);
ConstructDocElementFrame(aPresContext,
state,
docElement,
mDocElementContainingBlock,
containerStyle,
docElementFrame);
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 (state.mFixedItems.childList) {
mFixedContainingBlock->SetInitialChildList(*aPresContext,
nsLayoutAtoms::fixedList,
state.mFixedItems.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)) {
#ifdef INCLUDE_XUL
// Need to (for XUL only) do a special check for the treechildren tag
PRInt32 nameSpaceID;
if (NS_SUCCEEDED(aContainer->GetNameSpaceID(nameSpaceID)) &&
nameSpaceID == nsXULAtoms::nameSpaceID) {
// See if we're the treechildren tag. This tag is treated differently,
// since it has no corresponding frame, but may have children that have
// frames (the whole hierarchical content model vs. flat table frame model
// problem).
nsIAtom* tag;
aContainer->GetTag(tag);
nsString tagName;
tag->ToString(tagName);
if (tagName == "treechildren")
{
// Retrieve the parent treeitem, and then obtain its frame. This is
// the prevSibling frame that we should use.
nsCOMPtr<nsIContent> parentItem;
aContainer->GetParent(*getter_AddRefs(parentItem));
shell->GetPrimaryFrameFor(parentItem, &prevSibling);
prevSibling->GetParent(&parentFrame);
// XXX: Optimize for the lazy frame instantiation case. Need to bail
// if our frame isn't visible
}
else
{
// No previous or next sibling so treat this like an appended frame.
isAppend = PR_TRUE;
shell->GetPrimaryFrameFor(aContainer, &parentFrame);
}
}
else {
#endif // INCLUDE_XUL
// No previous or next sibling so treat this like an appended frame.
isAppend = PR_TRUE;
shell->GetPrimaryFrameFor(aContainer, &parentFrame);
#ifdef INCLUDE_XUL
}
#endif
} 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) {
nsFrameItems frameItems;
nsFrameConstructorState state(mFixedContainingBlock,
GetAbsoluteContainingBlock(aPresContext, parentFrame),
GetFloaterContainingBlock(aPresContext, parentFrame));
rv = ConstructFrame(aPresContext, state, aChild, parentFrame, PR_FALSE,
frameItems);
nsIFrame* newFrame = frameItems.childList;
if (NS_SUCCEEDED(rv) && (nsnull != newFrame)) {
// Notify the parent frame
if (isAppend) {
rv = AppendFrames(aPresContext, shell, aContainer, parentFrame, newFrame);
} else {
if (!prevSibling) {
// We're inserting the new frame as the first child. See if the
// parent has a :before pseudo-element
nsIFrame* firstChild;
parentFrame->FirstChild(nsnull, &firstChild);
if (IsGeneratedContentFor(aContainer, firstChild)) {
// Insert the new frames after the :before pseudo-element
prevSibling = firstChild;
}
}
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 (state.mAbsoluteItems.childList) {
rv = state.mAbsoluteItems.containingBlock->AppendFrames(*aPresContext, *shell,
nsLayoutAtoms::absoluteList,
state.mAbsoluteItems.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 (state.mFixedItems.childList) {
rv = state.mFixedItems.containingBlock->AppendFrames(*aPresContext, *shell,
nsLayoutAtoms::fixedList,
state.mFixedItems.childList);
}
// If there are new floating 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 (state.mFloatedItems.childList) {
rv = state.mFloatedItems.containingBlock->AppendFrames(*aPresContext, *shell,
nsLayoutAtoms::floaterList,
state.mFloatedItems.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;
}
// Returns PR_TRUE if aAncestorFrame is an ancestor frame of aFrame
static PRBool
IsAncestorFrame(nsIFrame* aFrame, nsIFrame* aAncestorFrame)
{
nsIFrame* parentFrame;
aFrame->GetParent(&parentFrame);
while (parentFrame) {
if (parentFrame == aAncestorFrame) {
return PR_TRUE;
}
parentFrame->GetParent(&parentFrame);
}
return PR_FALSE;
}
static nsresult
DeleteOutOfFlowChildFrames(nsIPresContext* aPresContext,
nsIFrame* aRemovedFrame,
nsIFrame* aFrame)
{
// Recursively walk aFrame's child frames looking for placeholder frames
nsIFrame* childFrame;
aFrame->FirstChild(nsnull, &childFrame);
while (childFrame) {
nsIAtom* frameType;
PRBool isPlaceholder;
// See if it's a placeholder frame
childFrame->GetFrameType(&frameType);
isPlaceholder = (nsLayoutAtoms::placeholderFrame == frameType);
NS_IF_RELEASE(frameType);
if (isPlaceholder) {
// Get the out-of-flow frame
nsIFrame* outOfFlowFrame = ((nsPlaceholderFrame*)childFrame)->GetOutOfFlowFrame();
// Find and delete any of its out-of-flow frames
DeleteOutOfFlowChildFrames(aPresContext, aRemovedFrame, outOfFlowFrame);
// Don't delete the out-of-flow frame if aRemovedFrame is one of its
// ancestor frames, because when aRemovedFrame is deleted it will delete
// its child frames including this out-of-flow frame
if (!IsAncestorFrame(outOfFlowFrame, aRemovedFrame)) {
nsIPresShell* presShell;
aPresContext->GetShell(&presShell);
// Remove the mapping from the out-of-flow frame to its placeholder
presShell->SetPlaceholderFrameFor(outOfFlowFrame, nsnull);
// Get the out-of-flow frame's parent
nsIFrame* parentFrame;
outOfFlowFrame->GetParent(&parentFrame);
// Get the child list name for the out-of-flow frame
nsIAtom* listName;
GetChildListNameFor(parentFrame, outOfFlowFrame, &listName);
// Ask the parent to delete the out-of-flow frame
parentFrame->RemoveFrame(*aPresContext, *presShell, listName, outOfFlowFrame);
NS_IF_RELEASE(listName);
NS_RELEASE(presShell);
}
} else {
DeleteOutOfFlowChildFrames(aPresContext, aRemovedFrame, childFrame);
}
// Get the next sibling child frame
childFrame->GetNextSibling(&childFrame);
}
return NS_OK;
}
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) {
// If the frame has any child frames that have been moved out of the
// flow, then delete them as well
DeleteOutOfFlowChildFrames(aPresContext, childFrame, childFrame);
// See if the child frame is a floating frame
const nsStyleDisplay* display;
childFrame->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&)display);
if (display->IsFloating()) {
// Get the placeholder frame
nsIFrame* placeholderFrame;
shell->GetPlaceholderFrameFor(childFrame, &placeholderFrame);
// Remove the mapping from the frame to its placeholder
shell->SetPlaceholderFrameFor(childFrame, nsnull);
// Now we remove the floating frame
// XXX has to be done first for now: the blocks line list
// contains an array of pointers to the placeholder - we have to
// remove the floater first (which gets rid of the lines
// reference to the placeholder and floater) and then remove the
// placeholder
nsIFrame* parentFrame;
childFrame->GetParent(&parentFrame);
rv = parentFrame->RemoveFrame(*aPresContext, *shell,
nsLayoutAtoms::floaterList, childFrame);
// Remove the placeholder frame first (XXX second for now) (so
// that it doesn't retain a dangling pointer to memory)
if (nsnull != placeholderFrame) {
placeholderFrame->GetParent(&parentFrame);
rv = parentFrame->RemoveFrame(*aPresContext, *shell, nsnull,
placeholderFrame);
}
}
else {
// 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);
#ifdef INCLUDE_XUL
// Need to (for XUL only) do a special check for the treeitem tag
PRInt32 nameSpaceID;
if (aContainer &&
NS_SUCCEEDED(aContainer->GetNameSpaceID(nameSpaceID)) &&
nameSpaceID == nsXULAtoms::nameSpaceID) {
// See if we're the treeitem tag. This tag is treated differently,
// since the children of the content node are actually SIBLING frames.
// We've only removed the parent frame. Now we have to remove all of
// its children.
nsCOMPtr<nsIAtom> tag;
aContainer->GetTag(*getter_AddRefs(tag));
nsString tagName;
tag->ToString(tagName);
if (tagName == "treeitem")
{
// Calling content removed on each of our content node children
// should do the trick.
PRInt32 count = 0;
aContainer->ChildCount(count);
for (PRInt32 i = 0; i < count; i++)
{
nsCOMPtr<nsIContent> childContent;
aContainer->ChildAt(i, *getter_AddRefs(childContent));
if (childContent)
{
// Call ContentRemoved.
ContentRemoved(aPresContext, aContainer,
childContent, i);
}
}
}
}
#endif // INCLUDE_XUL
}
}
if (mInitialContainingBlock == childFrame) {
mInitialContainingBlock = nsnull;
}
}
return rv;
}
static void
UpdateViewsForTree(nsIFrame* aFrame, nsIViewManager* aViewManager)
{
nsIView* view;
aFrame->GetView(&view);
if (view) {
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);
aViewManager->SetViewOpacity(view, color->mOpacity);
}
// now do children fo frame
PRInt32 listIndex = 0;
nsIAtom* childList = nsnull;
do {
nsIFrame* child = nsnull;
aFrame->FirstChild(childList, &child);
while (child) {
UpdateViewsForTree(child, aViewManager);
child->GetNextSibling(&child);
}
NS_IF_RELEASE(childList);
aFrame->GetAdditionalChildListName(listIndex++, &childList);
} while (childList);
NS_IF_RELEASE(childList);
}
static void
ApplyRenderingChangeToTree(nsIPresContext* aPresContext,
nsIFrame* aFrame)
{
nsIViewManager* viewManager = nsnull;
// Trigger rendering updates by damaging this frame and any
// continuations of this frame.
// XXX this needs to detect the need for a view due to an opacity change and deal with it...
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);
}
UpdateViewsForTree(aFrame, viewManager);
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;
}
PRInt32
nsCSSFrameConstructor::FindRestyledFramesBelow(nsIFrame* aFrame,
nsIPresContext* aPresContext,
PRInt32 aParentHint,
nsStyleChangeList& aChanges)
{
PRInt32 count = 0;
PRInt32 listIndex = 0;
PRInt32 childChange;
nsIAtom* childList = nsnull;
do {
nsIFrame* child = nsnull;
aFrame->FirstChild(childList, &child);
while (child) {
nsIStyleContext* oldContext;
child->GetStyleContext(&oldContext);
if (oldContext) {
nsIStyleContext* parentContext = oldContext->GetParent();
nsresult didChange = child->ReResolveStyleContext(aPresContext, parentContext,
aParentHint, &aChanges,
&childChange);
NS_IF_RELEASE(parentContext);
if (NS_SUCCEEDED(didChange)) {
if (NS_COMFALSE == didChange) {
count += FindRestyledFramesBelow(child, aPresContext, aParentHint, aChanges);
}
else {
nsIStyleContext* newContext;
child->GetStyleContext(&newContext);
if (newContext) {
PRInt32 hint = NS_STYLE_HINT_NONE;
newContext->CalcStyleDifference(oldContext, hint);
if (aParentHint < hint) { // if child needs more than parent did
aChanges.AppendChange(child, hint);
count++;
if (hint < NS_STYLE_HINT_FRAMECHANGE) { // look for greater change below
count += FindRestyledFramesBelow(child, aPresContext, hint, aChanges);
}
}
NS_RELEASE(newContext);
}
}
}
NS_RELEASE(oldContext);
}
child->GetNextSibling(&child);
}
NS_IF_RELEASE(childList);
aFrame->GetAdditionalChildListName(listIndex++, &childList);
} while (childList);
NS_IF_RELEASE(childList);
return count;
}
NS_IMETHODIMP
nsCSSFrameConstructor::ProcessRestyledFrames(nsStyleChangeList& aChangeList,
nsIPresContext* aPresContext)
{
PRInt32 count = aChangeList.Count();
while (0 < count--) {
nsIFrame* frame;
PRInt32 hint;
aChangeList.ChangeAt(count, frame, hint);
switch (hint) {
case NS_STYLE_HINT_RECONSTRUCT_ALL:
NS_ERROR("This shouldn't happen");
break;
case NS_STYLE_HINT_FRAMECHANGE:
nsIContent* content;
frame->GetContent(&content);
RecreateFramesForContent(aPresContext, content);
NS_IF_RELEASE(content);
break;
case NS_STYLE_HINT_REFLOW:
StyleChangeReflow(aPresContext, frame, nsnull);
break;
case NS_STYLE_HINT_VISUAL:
ApplyRenderingChangeToTree(aPresContext, frame);
break;
case NS_STYLE_HINT_CONTENT:
default:
break;
}
}
aChangeList.Clear();
return NS_OK;
}
PRInt32
nsCSSFrameConstructor::ComputeStateChangeFor(nsIPresContext* aPresContext, nsIFrame* aFrame,
nsStyleChangeList& aChangeList,
PRInt32 aFrameChange)
{
nsIFrame* frame = aFrame;
do {
nsIStyleContext* oldFrameContext;
frame->GetStyleContext(&oldFrameContext);
NS_ASSERTION(nsnull != oldFrameContext, "frame must have style context");
if (oldFrameContext) {
nsIStyleContext* parentContext = oldFrameContext->GetParent();
nsresult didChange = frame->ReResolveStyleContext(aPresContext, parentContext,
aFrameChange, &aChangeList,
&aFrameChange);
NS_IF_RELEASE(parentContext);
if (NS_SUCCEEDED(didChange)) {
if (NS_COMFALSE == didChange) {
// need remap? I don't think so
FindRestyledFramesBelow(frame, aPresContext, aFrameChange, aChangeList);
}
}
NS_RELEASE(oldFrameContext);
}
frame->GetNextInFlow(&frame);
} while (frame);
return aFrameChange;
}
NS_IMETHODIMP
nsCSSFrameConstructor::ContentStatesChanged(nsIPresContext* aPresContext,
nsIContent* aContent1,
nsIContent* aContent2)
{
nsresult result = NS_OK;
nsCOMPtr<nsIPresShell> shell;
aPresContext->GetShell(getter_AddRefs(shell));
NS_ASSERTION(shell, "couldn't get pres shell");
if (shell) {
nsIStyleSet* styleSet;
shell->GetStyleSet(&styleSet);
NS_ASSERTION(styleSet, "couldn't get style set");
if (styleSet) { // test if any style rules exist which are dependent on content state
nsIFrame* primaryFrame1 = nsnull;
nsIFrame* primaryFrame2 = nsnull;
if (aContent1 && (NS_OK == styleSet->HasStateDependentStyle(aPresContext, aContent1))) {
shell->GetPrimaryFrameFor(aContent1, &primaryFrame1);
}
else {
aContent1 = nsnull;
}
if (aContent2 && (aContent2 != aContent1) &&
(NS_OK == styleSet->HasStateDependentStyle(aPresContext, aContent2))) {
shell->GetPrimaryFrameFor(aContent2, &primaryFrame2);
}
else {
aContent2 = nsnull;
}
NS_RELEASE(styleSet);
if (primaryFrame1 && primaryFrame2) { // detect if one is parent of other, skip child
nsIFrame* parent;
primaryFrame1->GetParent(&parent);
while (parent) {
if (parent == primaryFrame2) { // frame2 is frame1's parent, skip frame1
primaryFrame1 = nsnull;
break;
}
parent->GetParent(&parent);
}
if (primaryFrame1) {
primaryFrame2->GetParent(&parent);
while (parent) {
if (parent == primaryFrame1) { // frame1 is frame2's parent, skip frame2
primaryFrame2 = nsnull;
break;
}
parent->GetParent(&parent);
}
}
}
if (primaryFrame1) {
nsStyleChangeList changeList1;
nsStyleChangeList changeList2;
PRInt32 frameChange1 = NS_STYLE_HINT_NONE;
PRInt32 frameChange2 = NS_STYLE_HINT_NONE;
frameChange1 = ComputeStateChangeFor(aPresContext, primaryFrame1, changeList1, frameChange1);
if ((frameChange1 != NS_STYLE_HINT_RECONSTRUCT_ALL) && (primaryFrame2)) {
frameChange2 = ComputeStateChangeFor(aPresContext, primaryFrame2, changeList2, frameChange2);
}
if ((frameChange1 == NS_STYLE_HINT_RECONSTRUCT_ALL) ||
(frameChange2 == NS_STYLE_HINT_RECONSTRUCT_ALL)) {
result = ReconstructDocElementHierarchy(aPresContext);
}
else {
switch (frameChange1) {
case NS_STYLE_HINT_FRAMECHANGE:
result = RecreateFramesForContent(aPresContext, aContent1);
changeList1.Clear();
break;
case NS_STYLE_HINT_REFLOW:
case NS_STYLE_HINT_VISUAL:
break;
case NS_STYLE_HINT_CONTENT:
// let primary frame deal with it
result = primaryFrame1->ContentChanged(aPresContext, aContent1, nsnull);
default:
break;
}
switch (frameChange2) {
case NS_STYLE_HINT_FRAMECHANGE:
result = RecreateFramesForContent(aPresContext, aContent2);
changeList2.Clear();
break;
case NS_STYLE_HINT_REFLOW:
case NS_STYLE_HINT_VISUAL:
break;
case NS_STYLE_HINT_CONTENT:
// let primary frame deal with it
result = primaryFrame2->ContentChanged(aPresContext, aContent2, nsnull);
// then process any children that need it
default:
break;
}
ProcessRestyledFrames(changeList1, aPresContext);
ProcessRestyledFrames(changeList2, aPresContext);
}
}
else if (primaryFrame2) {
nsStyleChangeList changeList;
PRInt32 frameChange = NS_STYLE_HINT_NONE;
frameChange = ComputeStateChangeFor(aPresContext, primaryFrame2, changeList, frameChange);
switch (frameChange) { // max change needed for top level frames
case NS_STYLE_HINT_RECONSTRUCT_ALL:
result = ReconstructDocElementHierarchy(aPresContext);
changeList.Clear();
break;
case NS_STYLE_HINT_FRAMECHANGE:
result = RecreateFramesForContent(aPresContext, aContent2);
changeList.Clear();
break;
case NS_STYLE_HINT_REFLOW:
case NS_STYLE_HINT_VISUAL:
break;
case NS_STYLE_HINT_CONTENT:
// let primary frame deal with it
result = primaryFrame2->ContentChanged(aPresContext, aContent2, nsnull);
// then process any children that need it
default:
break;
}
ProcessRestyledFrames(changeList, aPresContext);
}
else { // no frames, reconstruct for content
if (aContent1) {
result = RecreateFramesForContent(aPresContext, aContent1);
}
if (aContent2) {
result = RecreateFramesForContent(aPresContext, aContent2);
}
}
}
}
return result;
}
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* primaryFrame;
shell->GetPrimaryFrameFor(aContent, &primaryFrame);
PRBool reconstruct = PR_FALSE;
PRBool restyle = PR_FALSE;
PRBool reframe = 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 (NS_STYLE_HINT_UNKNOWN == aHint) {
nsIStyledContent* styledContent;
result = aContent->QueryInterface(nsIStyledContent::GetIID(), (void**)&styledContent);
if (NS_OK == result) {
// Get style hint from HTML content object.
styledContent->GetStyleHintForAttributeChange(aAttribute, &aHint);
NS_RELEASE(styledContent);
}
}
switch (aHint) {
default:
case NS_STYLE_HINT_RECONSTRUCT_ALL:
reconstruct = PR_TRUE;
case NS_STYLE_HINT_FRAMECHANGE:
reframe = PR_TRUE;
case NS_STYLE_HINT_REFLOW:
case NS_STYLE_HINT_VISUAL:
case NS_STYLE_HINT_UNKNOWN:
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 == reconstruct) {
result = ReconstructDocElementHierarchy(aPresContext);
}
else if (PR_TRUE == reframe) {
result = RecreateFramesForContent(aPresContext, aContent);
}
else if (PR_TRUE == restyle) {
// If there is no frame then there is no point in re-styling it,
// is there?
if (primaryFrame) {
PRInt32 maxHint = aHint;
nsIFrame* frame = primaryFrame;
nsStyleChangeList changeList;
// put primary frame on list to deal with, re-resolve may update or add next in flows
changeList.AppendChange(primaryFrame, maxHint);
do {
nsIStyleContext* oldFrameContext;
frame->GetStyleContext(&oldFrameContext);
NS_ASSERTION(nsnull != oldFrameContext, "frame must have style context");
if (oldFrameContext) {
nsIStyleContext* parentContext = oldFrameContext->GetParent();
nsresult didChange = frame->ReResolveStyleContext(aPresContext, parentContext, maxHint,
&changeList, &maxHint);
NS_IF_RELEASE(parentContext);
if (NS_SUCCEEDED(didChange)) {
if (NS_COMFALSE == didChange) {
if (maxHint < NS_STYLE_HINT_FRAMECHANGE) {
oldFrameContext->RemapStyle(aPresContext);
FindRestyledFramesBelow(frame, aPresContext, maxHint, changeList);
}
}
}
NS_RELEASE(oldFrameContext);
}
frame->GetNextInFlow(&frame);
} while (frame);
switch (maxHint) { // maxHint is hint for primary only
case NS_STYLE_HINT_RECONSTRUCT_ALL:
result = ReconstructDocElementHierarchy(aPresContext);
changeList.Clear();
break;
case NS_STYLE_HINT_FRAMECHANGE:
result = RecreateFramesForContent(aPresContext, aContent);
changeList.Clear();
break;
case NS_STYLE_HINT_REFLOW:
case NS_STYLE_HINT_VISUAL:
break;
case NS_STYLE_HINT_CONTENT:
// let the frame deal with it, since we don't know how to
result = primaryFrame->AttributeChanged(aPresContext, aContent, aAttribute, maxHint);
default:
break;
}
// handle any children (primary may be on list too)
ProcessRestyledFrames(changeList, aPresContext);
}
else { // no frame now, possibly genetate one with new style data
result = RecreateFramesForContent(aPresContext, aContent);
}
}
return result;
}
// Style change notifications
NS_IMETHODIMP
nsCSSFrameConstructor::StyleRuleChanged(nsIPresContext* aPresContext,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule,
PRInt32 aHint)
{
nsresult result = NS_OK;
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 (reframe) {
result = ReconstructDocElementHierarchy(aPresContext);
}
else 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 (reflow) {
StyleChangeReflow(aPresContext, frame, nsnull);
}
else if (render) {
ApplyRenderingChangeToTree(aPresContext, frame);
}
}
return result;
}
NS_IMETHODIMP
nsCSSFrameConstructor::StyleRuleAdded(nsIPresContext* aPresContext,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule)
{
// XXX TBI: should query rule for impact and do minimal work
ReconstructDocElementHierarchy(aPresContext);
return NS_OK;
}
NS_IMETHODIMP
nsCSSFrameConstructor::StyleRuleRemoved(nsIPresContext* aPresContext,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule)
{
// XXX TBI: should query rule for impact and do minimal work
ReconstructDocElementHierarchy(aPresContext);
return NS_OK;
}
// Construct an alternate frame to use when the image can't be rendered
nsresult
nsCSSFrameConstructor::ConstructAlternateImageFrame(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIStyleContext* aStyleContext,
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
imageElement->GetSrc(altText);
if (altText.Length() > 0) {
// 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);
// 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 either an inline frame, block frame, or area frame
nsIFrame* containerFrame;
const nsStyleDisplay* display = (const nsStyleDisplay*)
aStyleContext->GetStyleData(eStyleStruct_Display);
const nsStylePosition* position = (const nsStylePosition*)
aStyleContext->GetStyleData(eStyleStruct_Position);
if (position->IsAbsolutelyPositioned()) {
NS_NewAbsoluteItemWrapperFrame(&containerFrame);
} else if (display->IsFloating() || (NS_STYLE_DISPLAY_BLOCK == display->mDisplay)) {
NS_NewBlockFrame(&containerFrame);
} else {
NS_NewInlineFrame(&containerFrame);
}
containerFrame->Init(*aPresContext, aContent, aParentFrame, aStyleContext, nsnull);
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, containerFrame,
aStyleContext, PR_FALSE);
// Create a text frame to display the alt-text. It gets a pseudo-element
// style context
nsIFrame* textFrame;
nsIStyleContext* textStyleContext;
NS_NewTextFrame(&textFrame);
aPresContext->ResolvePseudoStyleContextFor(aContent, nsHTMLAtoms::textPseudo,
aStyleContext, PR_FALSE,
&textStyleContext);
textFrame->Init(*aPresContext, altTextContent, containerFrame,
textStyleContext, nsnull);
NS_RELEASE(textStyleContext);
containerFrame->SetInitialChildList(*aPresContext, nsnull, textFrame);
// Return the container frame
aFrame = containerFrame;
}
return rv;
}
NS_IMETHODIMP
nsCSSFrameConstructor::CantRenderReplacedElement(nsIPresContext* aPresContext,
nsIFrame* aFrame)
{
nsIFrame* parentFrame;
nsCOMPtr<nsIStyleContext> styleContext;
nsCOMPtr<nsIContent> content;
nsCOMPtr<nsIAtom> tag;
nsresult rv = NS_OK;
aFrame->GetParent(&parentFrame);
aFrame->GetStyleContext(getter_AddRefs(styleContext));
// Get aFrame's content object and the tag name
aFrame->GetContent(getter_AddRefs(content));
NS_ASSERTION(content, "null content object");
content->GetTag(*getter_AddRefs(tag));
// Get the child list name that the frame is contained in
nsCOMPtr<nsIAtom> listName;
GetChildListNameFor(parentFrame, aFrame, getter_AddRefs(listName));
// If the frame is out of the flow, then it has a placeholder frame.
nsIFrame* placeholderFrame = nsnull;
nsCOMPtr<nsIPresShell> presShell;
aPresContext->GetShell(getter_AddRefs(presShell));
if (listName) {
presShell->GetPlaceholderFrameFor(aFrame, &placeholderFrame);
}
// Get the previous sibling frame
nsIFrame* firstChild;
parentFrame->FirstChild(listName, &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, styleContext,
parentFrame, newFrame);
if (NS_SUCCEEDED(rv)) {
// Delete the current frame and insert the new frame
parentFrame->RemoveFrame(*aPresContext, *presShell, listName, aFrame);
if (placeholderFrame) {
// Remove the association between the old frame and its placeholder
presShell->SetPlaceholderFrameFor(aFrame, nsnull);
// Reuse the existing placeholder frame, and add an association to the
// new frame
presShell->SetPlaceholderFrameFor(newFrame, placeholderFrame);
// Placeholder frames have a pointer back to the out-of-flow frame.
// Make sure that's correct
((nsPlaceholderFrame*)placeholderFrame)->SetOutOfFlowFrame(newFrame);
}
parentFrame->InsertFrames(*aPresContext, *presShell, listName, prevSibling, newFrame);
}
} else if ((nsHTMLAtoms::object == tag.get()) ||
(nsHTMLAtoms::embed == tag.get()) ||
(nsHTMLAtoms::applet == tag.get())) {
// It's an OBJECT element or APPLET, so we should display the contents
// instead. Create a frame based on the display type
nsFrameConstructorState state(mFixedContainingBlock,
GetAbsoluteContainingBlock(aPresContext, parentFrame),
GetFloaterContainingBlock(aPresContext, parentFrame));
nsFrameItems frameItems;
const nsStyleDisplay* display = (const nsStyleDisplay*)
styleContext->GetStyleData(eStyleStruct_Display);
rv = ConstructFrameByDisplayType(aPresContext, state, display, content,
parentFrame, styleContext, PR_FALSE, frameItems);
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, listName, aFrame);
if (placeholderFrame) {
// Remove the association between the old frame and its placeholder
presShell->SetPlaceholderFrameFor(aFrame, nsnull);
// Reuse the existing placeholder frame, and add an association to the
// new frame
presShell->SetPlaceholderFrameFor(newFrame, placeholderFrame);
// Placeholder frames have a pointer back to the out-of-flow frame.
// Make sure that's correct
((nsPlaceholderFrame*)placeholderFrame)->SetOutOfFlowFrame(newFrame);
}
parentFrame->InsertFrames(*aPresContext, *presShell, listName, 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 (state.mAbsoluteItems.childList) {
rv = state.mAbsoluteItems.containingBlock->AppendFrames(*aPresContext, *presShell,
nsLayoutAtoms::absoluteList,
state.mAbsoluteItems.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 (state.mFixedItems.childList) {
rv = state.mFixedItems.containingBlock->AppendFrames(*aPresContext, *presShell,
nsLayoutAtoms::fixedList,
state.mFixedItems.childList);
}
// If there are new floating 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 (state.mFloatedItems.childList) {
rv = state.mFloatedItems.containingBlock->AppendFrames(*aPresContext,
*presShell,
nsLayoutAtoms::floaterList,
state.mFloatedItems.childList);
}
}
} else if (nsHTMLAtoms::input == tag.get()) {
// XXX image INPUT elements are also image frames, but don't throw away the
// image frame, because the frame class has extra logic that is specific to
// INPUT elements
} else {
NS_ASSERTION(PR_FALSE, "unexpected tag");
}
return rv;
}
nsresult
nsCSSFrameConstructor::CreateContinuingOuterTableFrame(nsIPresContext* aPresContext,
nsIFrame* aFrame,
nsIFrame* aParentFrame,
nsIContent* aContent,
nsIStyleContext* aStyleContext,
nsIFrame** aContinuingFrame)
{
nsIFrame* newFrame;
nsresult rv;
rv = NS_NewTableOuterFrame(&newFrame);
if (NS_SUCCEEDED(rv)) {
newFrame->Init(*aPresContext, aContent, aParentFrame, aStyleContext, aFrame);
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, newFrame,
aStyleContext, PR_FALSE);
// Create a continuing inner table frame, and if there's a caption then
// replicate the caption
nsIFrame* childFrame;
nsFrameItems newChildFrames;
aFrame->FirstChild(nsnull, &childFrame);
while (childFrame) {
nsIAtom* tableType;
// See if it's the inner table frame
childFrame->GetFrameType(&tableType);
if (nsLayoutAtoms::tableFrame == tableType) {
nsIFrame* continuingTableFrame;
// It's the inner table frame, so create a continuing frame
CreateContinuingFrame(aPresContext, childFrame, newFrame, &continuingTableFrame);
newChildFrames.AddChild(continuingTableFrame);
} else {
nsIContent* caption;
nsIStyleContext* captionStyle;
const nsStyleDisplay* display;
childFrame->GetContent(&caption);
childFrame->GetStyleContext(&captionStyle);
display = (const nsStyleDisplay*)captionStyle->GetStyleData(eStyleStruct_Display);
NS_ASSERTION(NS_STYLE_DISPLAY_TABLE_CAPTION == display->mDisplay, "expected caption");
// Replicate the caption frame
// XXX We have to do it this way instead of calling ConstructFrameByDisplayType(),
// because of a bug in the way ConstructTableFrame() handles the initial child
// list...
nsIFrame* captionFrame;
nsFrameItems childItems;
nsFrameConstructorState state(mFixedContainingBlock,
GetAbsoluteContainingBlock(aPresContext, newFrame),
captionFrame);
NS_NewTableCaptionFrame(&captionFrame);
captionFrame->Init(*aPresContext, caption, newFrame, captionStyle, nsnull);
ProcessChildren(aPresContext, state, caption, captionFrame,
PR_TRUE, childItems);
captionFrame->SetInitialChildList(*aPresContext, nsnull, childItems.childList);
// XXX Deal with absolute and fixed frames...
if (state.mFloatedItems.childList) {
captionFrame->SetInitialChildList(*aPresContext,
nsLayoutAtoms::floaterList,
state.mFloatedItems.childList);
}
newChildFrames.AddChild(captionFrame);
NS_RELEASE(caption);
NS_RELEASE(captionStyle);
}
NS_IF_RELEASE(tableType);
childFrame->GetNextSibling(&childFrame);
}
// Set the outer table's initial child list
newFrame->SetInitialChildList(*aPresContext, nsnull, newChildFrames.childList);
}
*aContinuingFrame = newFrame;
return rv;
}
nsresult
nsCSSFrameConstructor::CreateContinuingTableFrame(nsIPresContext* aPresContext,
nsIFrame* aFrame,
nsIFrame* aParentFrame,
nsIContent* aContent,
nsIStyleContext* aStyleContext,
nsIFrame** aContinuingFrame)
{
nsIFrame* newFrame;
nsresult rv;
rv = NS_NewTableFrame(&newFrame);
if (NS_SUCCEEDED(rv)) {
newFrame->Init(*aPresContext, aContent, aParentFrame, aStyleContext, aFrame);
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, newFrame,
aStyleContext, PR_FALSE);
// Replicate any header/footer frames
nsIFrame* rowGroupFrame;
nsFrameItems childFrames;
aFrame->FirstChild(nsnull, &rowGroupFrame);
while (rowGroupFrame) {
// See if it's a header/footer
nsIStyleContext* rowGroupStyle;
const nsStyleDisplay* display;
rowGroupFrame->GetStyleContext(&rowGroupStyle);
display = (const nsStyleDisplay*)rowGroupStyle->GetStyleData(eStyleStruct_Display);
if ((NS_STYLE_DISPLAY_TABLE_HEADER_GROUP == display->mDisplay) ||
(NS_STYLE_DISPLAY_TABLE_FOOTER_GROUP == display->mDisplay)) {
// Replicate the header/footer frame
nsIFrame* headerFooterFrame;
nsFrameItems childItems;
nsIContent* headerFooter;
nsFrameConstructorState state(mFixedContainingBlock,
GetAbsoluteContainingBlock(aPresContext, newFrame),
nsnull);
NS_NewTableRowGroupFrame(&headerFooterFrame);
rowGroupFrame->GetContent(&headerFooter);
headerFooterFrame->Init(*aPresContext, headerFooter, newFrame,
rowGroupStyle, nsnull);
ProcessChildren(aPresContext, state, headerFooter, headerFooterFrame,
PR_FALSE, childItems);
NS_ASSERTION(!state.mFloatedItems.childList, "unexpected floated element");
NS_RELEASE(headerFooter);
headerFooterFrame->SetInitialChildList(*aPresContext, nsnull, childItems.childList);
// Table specific initialization
((nsTableRowGroupFrame*)headerFooterFrame)->InitRepeatedFrame
((nsTableRowGroupFrame*)rowGroupFrame);
// XXX Deal with absolute and fixed frames...
childFrames.AddChild(headerFooterFrame);
}
NS_RELEASE(rowGroupStyle);
// Header and footer must be first, and then the body row groups.
// So if we found a body row group, then stop looking for header and
// footer elements
if (NS_STYLE_DISPLAY_TABLE_ROW_GROUP == display->mDisplay) {
break;
}
// Get the next row group frame
rowGroupFrame->GetNextSibling(&rowGroupFrame);
}
// Set the table frame's initial child list
newFrame->SetInitialChildList(*aPresContext, nsnull, childFrames.childList);
}
*aContinuingFrame = newFrame;
return rv;
}
NS_IMETHODIMP
nsCSSFrameConstructor::CreateContinuingFrame(nsIPresContext* aPresContext,
nsIFrame* aFrame,
nsIFrame* aParentFrame,
nsIFrame** aContinuingFrame)
{
nsIAtom* frameType;
nsIContent* content;
nsIStyleContext* styleContext;
nsIFrame* newFrame = nsnull;
nsresult rv;
// Use the frame type to determine what type of frame to create
aFrame->GetFrameType(&frameType);
aFrame->GetContent(&content);
aFrame->GetStyleContext(&styleContext);
if (nsLayoutAtoms::textFrame == frameType) {
rv = NS_NewTextFrame(&newFrame);
if (NS_SUCCEEDED(rv)) {
newFrame->Init(*aPresContext, content, aParentFrame, styleContext, aFrame);
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, newFrame,
styleContext, PR_FALSE);
}
} else if (nsLayoutAtoms::inlineFrame == frameType) {
rv = NS_NewInlineFrame(&newFrame);
if (NS_SUCCEEDED(rv)) {
newFrame->Init(*aPresContext, content, aParentFrame, styleContext, aFrame);
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, newFrame,
styleContext, PR_FALSE);
}
} else if (nsLayoutAtoms::blockFrame == frameType) {
rv = NS_NewBlockFrame(&newFrame);
if (NS_SUCCEEDED(rv)) {
newFrame->Init(*aPresContext, content, aParentFrame, styleContext, aFrame);
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, newFrame,
styleContext, PR_FALSE);
}
} else if (nsLayoutAtoms::areaFrame == frameType) {
rv = NS_NewAreaFrame(&newFrame);
if (NS_SUCCEEDED(rv)) {
newFrame->Init(*aPresContext, content, aParentFrame, styleContext,
aFrame);
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, newFrame,
styleContext, PR_FALSE);
}
} else if (nsLayoutAtoms::positionedInlineFrame == frameType) {
rv = NS_NewPositionedInlineFrame(&newFrame);
if (NS_SUCCEEDED(rv)) {
newFrame->Init(*aPresContext, content, aParentFrame, styleContext, aFrame);
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, newFrame,
styleContext, PR_FALSE);
}
} else if (nsLayoutAtoms::pageFrame == frameType) {
rv = NS_NewPageFrame(&newFrame);
if (NS_SUCCEEDED(rv)) {
newFrame->Init(*aPresContext, content, aParentFrame, styleContext, aFrame);
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, newFrame,
styleContext, PR_TRUE);
}
} else if (nsLayoutAtoms::tableOuterFrame == frameType) {
rv = CreateContinuingOuterTableFrame(aPresContext, aFrame, aParentFrame,
content, styleContext, &newFrame);
} else if (nsLayoutAtoms::tableFrame == frameType) {
rv = CreateContinuingTableFrame(aPresContext, aFrame, aParentFrame,
content, styleContext, &newFrame);
} else if (nsLayoutAtoms::tableRowGroupFrame == frameType) {
rv = NS_NewTableRowGroupFrame(&newFrame);
if (NS_SUCCEEDED(rv)) {
newFrame->Init(*aPresContext, content, aParentFrame, styleContext, aFrame);
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, newFrame,
styleContext, PR_FALSE);
}
} else if (nsLayoutAtoms::tableRowFrame == frameType) {
rv = NS_NewTableRowFrame(&newFrame);
if (NS_SUCCEEDED(rv)) {
newFrame->Init(*aPresContext, content, aParentFrame, styleContext, aFrame);
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, newFrame,
styleContext, PR_FALSE);
// Create a continuing frame for each table cell frame
nsIFrame* cellFrame;
nsFrameItems newChildList;
aFrame->FirstChild(nsnull, &cellFrame);
while (cellFrame) {
nsIAtom* tableType;
// See if it's a table cell frame
cellFrame->GetFrameType(&tableType);
if (nsLayoutAtoms::tableCellFrame == tableType) {
nsIFrame* continuingCellFrame;
CreateContinuingFrame(aPresContext, cellFrame, newFrame, &continuingCellFrame);
newChildList.AddChild(continuingCellFrame);
}
NS_IF_RELEASE(tableType);
cellFrame->GetNextSibling(&cellFrame);
}
// Set the table cell's initial child list
newFrame->SetInitialChildList(*aPresContext, nsnull, newChildList.childList);
}
} else if (nsLayoutAtoms::tableCellFrame == frameType) {
rv = NS_NewTableCellFrame(&newFrame);
if (NS_SUCCEEDED(rv)) {
newFrame->Init(*aPresContext, content, aParentFrame, styleContext, aFrame);
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, newFrame,
styleContext, PR_FALSE);
// Create a continuing area frame
nsIFrame* areaFrame;
nsIFrame* continuingAreaFrame;
aFrame->FirstChild(nsnull, &areaFrame);
CreateContinuingFrame(aPresContext, areaFrame, newFrame, &continuingAreaFrame);
// Set the table cell's initial child list
newFrame->SetInitialChildList(*aPresContext, nsnull, continuingAreaFrame);
}
} else if (nsLayoutAtoms::lineFrame == frameType) {
rv = NS_NewFirstLineFrame(&newFrame);
if (NS_SUCCEEDED(rv)) {
newFrame->Init(*aPresContext, content, aParentFrame, styleContext, aFrame);
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, newFrame,
styleContext, PR_FALSE);
}
} else if (nsLayoutAtoms::letterFrame == frameType) {
rv = NS_NewFirstLetterFrame(&newFrame);
if (NS_SUCCEEDED(rv)) {
newFrame->Init(*aPresContext, content, aParentFrame, styleContext, aFrame);
nsHTMLContainerFrame::CreateViewForFrame(*aPresContext, newFrame,
styleContext, PR_FALSE);
}
} else {
NS_ASSERTION(PR_FALSE, "unexpected frame type");
rv = NS_ERROR_UNEXPECTED;
}
*aContinuingFrame = newFrame;
NS_RELEASE(styleContext);
NS_IF_RELEASE(content);
NS_IF_RELEASE(frameType);
return rv;
}
nsresult
nsCSSFrameConstructor::RecreateFramesForContent(nsIPresContext* aPresContext,
nsIContent* aContent)
{
nsresult rv = NS_OK;
nsIContent *container;
rv = aContent->GetParent(container);
if (container) {
PRInt32 indexInContainer;
rv = container->IndexOf(aContent, indexInContainer);
if (NS_OK == rv) {
// First, remove the frames associated with the content object on which the
// attribute change occurred.
rv = ContentRemoved(aPresContext, container, aContent, indexInContainer);
if (NS_OK == rv) {
// Now, recreate the frames associated with this content object.
rv = ContentInserted(aPresContext, container, aContent, indexInContainer);
}
}
NS_RELEASE(container);
}
return rv;
}
//////////////////////////////////////////////////////////////////////
// Block frame construction code
PRBool
nsCSSFrameConstructor::HaveFirstLetterStyle(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIStyleContext* aStyleContext)
{
nsIStyleContext* fls = nsnull;
aPresContext->ProbePseudoStyleContextFor(aContent,
nsHTMLAtoms::firstLetterPseudo,
aStyleContext, PR_FALSE, &fls);
if (fls) {
NS_RELEASE(fls);
return PR_TRUE;
}
return PR_FALSE;
}
nsIStyleContext*
nsCSSFrameConstructor::GetFirstLetterStyle(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIStyleContext* aStyleContext)
{
nsIStyleContext* fls = nsnull;
aPresContext->ResolvePseudoStyleContextFor(aContent,
nsHTMLAtoms::firstLetterPseudo,
aStyleContext, PR_FALSE, &fls);
return fls;
}
static PRBool
ShouldCreateFirstLetterFrame(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aFrame)
{
PRBool result = PR_FALSE;
NS_PRECONDITION(aFrame, "null ptr");
// See if the first frame isa text frame and if it is, that it has
// some non-whitespace content.
nsIAtom* frameType;
aFrame->GetFrameType(&frameType);
if (frameType == nsLayoutAtoms::textFrame) {
nsITextContent* tc = nsnull;
nsresult rv = aContent->QueryInterface(kITextContentIID, (void**) &tc);
if (NS_SUCCEEDED(rv)) {
tc->IsOnlyWhitespace(&result);
result = !result;
NS_RELEASE(tc);
}
}
NS_IF_RELEASE(frameType);
return result;
}
nsresult
nsCSSFrameConstructor::ProcessBlockChildren(nsIPresContext* aPresContext,
nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aFrame,
nsFrameItems& aFrameItems,
PRBool aCanHaveGeneratedContent,
PRBool aForBlock)
{
nsresult rv = NS_OK;
nsIStyleContext* styleContext = nsnull;
if (aCanHaveGeneratedContent) {
// Probe for generated content before
nsIFrame* generatedFrame;
aFrame->GetStyleContext(&styleContext);
if (CreateGeneratedContentFrame(aPresContext, aFrame, aContent,
styleContext, nsCSSAtoms::beforePseudo,
&generatedFrame)) {
// Add the generated frame to the child list
aFrameItems.AddChild(generatedFrame);
}
}
// Iterate the child content objects and construct frames
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
rv = ConstructFrame(aPresContext, aState, childContent, aFrame, i == 0,
aFrameItems);
if (NS_FAILED(rv)) {
return rv;
}
// Process first-letter frame that is the immediate child of the parent
if ((i == 0) &&
ShouldCreateFirstLetterFrame(aPresContext, childContent,
aFrameItems.childList)) {
rv = WrapTextFrame(aPresContext, aFrameItems.childList, aContent,
childContent, aFrame, aFrameItems, aState.mFloatedItems,
aForBlock);
}
}
}
if (aCanHaveGeneratedContent) {
// Probe for generated content after
nsIFrame* generatedFrame;
if (CreateGeneratedContentFrame(aPresContext, aFrame, aContent,
styleContext, nsCSSAtoms::afterPseudo,
&generatedFrame)) {
// Add the generated frame to the child list
aFrameItems.AddChild(generatedFrame);
}
}
NS_IF_RELEASE(styleContext);
return rv;
}
// Determine how many characters in the text fragment that applies to
// the first letter
static PRInt32
FirstLetterCount(nsTextFragment* aFragments, PRInt32 aNumFragments)
{
PRInt32 count = 0;
PRInt32 firstLetterLength = 0;
PRBool done = PR_FALSE;
while (aNumFragments && !done) {
PRInt32 i, n = aFragments->GetLength();
for (i = 0; i < n; i++) {
PRUnichar ch = aFragments->CharAt(i);
if (XP_IS_SPACE(ch)) {
if (firstLetterLength) {
done = PR_TRUE;
break;
}
count++;
continue;
}
// XXX I18n
if ((ch == '\'') || (ch == '\"')) {
if (firstLetterLength) {
done = PR_TRUE;
break;
}
// keep looping
firstLetterLength = 1;
}
else {
count++;
done = PR_TRUE;
break;
}
}
aFragments++;
aNumFragments--;
}
return count;
}
static PRInt32
TotalLength(nsTextFragment* aFragments, PRInt32 aNumFragments)
{
PRInt32 sum = 0;
while (--aNumFragments >= 0) {
sum += aFragments->GetLength();
}
return sum;
}
static PRBool NeedFirstLetterContinuation(nsIContent* aContent)
{
NS_PRECONDITION(aContent, "null ptr");
PRBool result = PR_FALSE;
if (aContent) {
nsITextContent* tc = nsnull;
nsresult rv = aContent->QueryInterface(kITextContentIID, (void**) &tc);
if (NS_SUCCEEDED(rv)) {
nsTextFragment* frags = nsnull;
PRInt32 numFrags = 0;
tc->GetText((const nsTextFragment*&)frags, numFrags);
PRInt32 flc = FirstLetterCount(frags, numFrags);
PRInt32 tl = TotalLength(frags, numFrags);
if (flc < tl) {
result = PR_TRUE;
}
}
}
return result;
}
void
nsCSSFrameConstructor::CreateFloatingFirstLetterFrame(
nsIPresContext* aPresContext,
nsIFrame* aTextFrame,
nsIContent* aContent,
nsIContent* aChildContent,
nsIFrame* aParentFrame,
nsFrameItems& aFrameItems,
nsFrameItems& aFloatingItems,
nsIStyleContext* aStyleContext)
{
// See if we will need to continue the text frame (does it contain
// more than just the first-letter text or not?) If it does, then we
// create (in advance) a continuation frame for it.
nsIFrame* nextTextFrame = nsnull;
if (NeedFirstLetterContinuation(aChildContent)) {
// Create continuation
CreateContinuingFrame(aPresContext, aTextFrame, aParentFrame,
&nextTextFrame);
}
// Create the first-letter-frame
nsIFrame* firstLetterFrame;
NS_NewFirstLetterFrame(&firstLetterFrame);
firstLetterFrame->Init(*aPresContext, aContent, aParentFrame,
aStyleContext, nsnull);
firstLetterFrame->SetInitialChildList(*aPresContext, nsnull, aTextFrame);
aTextFrame->SetParent(firstLetterFrame);
// Now make the placeholder
nsIFrame* placeholderFrame;
CreatePlaceholderFrameFor(aPresContext, aContent, firstLetterFrame,
aStyleContext, aParentFrame,
&placeholderFrame);
// Update the child lists for the frame containing the floating first
// letter frame.
aFloatingItems.AddChild(firstLetterFrame);
aFrameItems.childList = placeholderFrame;
aFrameItems.lastChild = placeholderFrame;
if (nextTextFrame) {
aFrameItems.AddChild(nextTextFrame);
}
}
nsresult
nsCSSFrameConstructor::WrapTextFrame(nsIPresContext* aPresContext,
nsIFrame* aTextFrame,
nsIContent* aContent,
nsIContent* aChildContent,
nsIFrame* aParentFrame,
nsFrameItems& aFrameItems,
nsAbsoluteItems& aFloatingItems,
PRBool aForBlock)
{
// Get style context for the first-letter-frame
nsIStyleContext* parentStyleContext;
if (NS_SUCCEEDED(aParentFrame->GetStyleContext(&parentStyleContext)) &&
parentStyleContext) {
nsIContent* correctContent = aContent;
if (!aForBlock) {
// Use content from containing block so that we can actually
// find a matching style rule.
aFloatingItems.containingBlock->GetContent(&correctContent);
}
nsIStyleContext* sc = GetFirstLetterStyle(aPresContext, correctContent,
parentStyleContext);
if (sc) {
const nsStyleDisplay* display = (const nsStyleDisplay*)
sc->GetStyleData(eStyleStruct_Display);
if (display->IsFloating()) {
CreateFloatingFirstLetterFrame(aPresContext, aTextFrame,
correctContent,
aChildContent, aParentFrame,
aFrameItems, aFloatingItems, sc);
}
else {
nsIFrame* newFrame;
nsresult rv = NS_NewFirstLetterFrame(&newFrame);
if (NS_SUCCEEDED(rv)) {
// Initialize the first-letter-frame.
rv = newFrame->Init(*aPresContext, correctContent, aParentFrame, sc,
nsnull);
newFrame->SetInitialChildList(*aPresContext, nsnull, aTextFrame);
aTextFrame->SetParent(newFrame);
// Replace the text frame in the flow child list with the
// first-letter-frame
aFrameItems.childList = newFrame;
aFrameItems.lastChild = newFrame;
}
}
NS_RELEASE(sc);
}
if (correctContent != aContent) {
NS_RELEASE(correctContent);
}
NS_RELEASE(parentStyleContext);
}
return NS_OK;
}
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