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gecko-dev/layout/style/nsHTMLStyleSheet.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
* Pierre Phaneuf <pp@ludusdesign.com>
*
* This Original Code has been modified by IBM Corporation. Modifications made by IBM
* described herein are Copyright (c) International Business Machines Corporation, 2000.
* Modifications to Mozilla code or documentation identified per MPL Section 3.3
*
* Date Modified by Description of modification
* 04/20/2000 IBM Corp. OS/2 VisualAge build.
*/
#include "nsHTMLStyleSheet.h"
#include "nsINameSpaceManager.h"
#include "nsIAtom.h"
#include "nsIURL.h"
#include "nsISupportsArray.h"
#include "nsMappedAttributes.h"
#include "nsILink.h"
#include "nsIFrame.h"
#include "nsStyleContext.h"
#include "nsHTMLAtoms.h"
#include "nsIPresContext.h"
#include "nsIEventStateManager.h"
#include "nsIDocument.h"
#include "nsIPresShell.h"
#include "nsStyleConsts.h"
#include "nsIDOMHTMLDocument.h"
#include "nsIDOMHTMLElement.h"
#include "nsCSSAnonBoxes.h"
#include "nsRuleWalker.h"
nsHTMLStyleSheet::HTMLColorRule::HTMLColorRule(nsHTMLStyleSheet* aSheet)
: mSheet(aSheet)
{
}
nsHTMLStyleSheet::HTMLColorRule::~HTMLColorRule()
{
}
NS_IMPL_ISUPPORTS1(nsHTMLStyleSheet::HTMLColorRule, nsIStyleRule)
NS_IMETHODIMP
nsHTMLStyleSheet::HTMLColorRule::GetStyleSheet(nsIStyleSheet*& aSheet) const
{
NS_IF_ADDREF(mSheet);
aSheet = mSheet;
return NS_OK;
}
NS_IMETHODIMP
nsHTMLStyleSheet::HTMLColorRule::MapRuleInfoInto(nsRuleData* aRuleData)
{
if (aRuleData->mSID == eStyleStruct_Color) {
if (aRuleData->mColorData->mColor.GetUnit() == eCSSUnit_Null)
aRuleData->mColorData->mColor = nsCSSValue(mColor);
}
return NS_OK;
}
#ifdef DEBUG
NS_IMETHODIMP
nsHTMLStyleSheet::HTMLColorRule::List(FILE* out, PRInt32 aIndent) const
{
return NS_OK;
}
#endif
nsHTMLStyleSheet::GenericTableRule::GenericTableRule(nsHTMLStyleSheet* aSheet)
{
mSheet = aSheet;
}
nsHTMLStyleSheet::GenericTableRule::~GenericTableRule()
{
}
NS_IMPL_ISUPPORTS1(nsHTMLStyleSheet::GenericTableRule, nsIStyleRule)
NS_IMETHODIMP
nsHTMLStyleSheet::GenericTableRule::GetStyleSheet(nsIStyleSheet*& aSheet) const
{
aSheet = mSheet;
return NS_OK;
}
NS_IMETHODIMP
nsHTMLStyleSheet::GenericTableRule::MapRuleInfoInto(nsRuleData* aRuleData)
{
// Nothing to do.
return NS_OK;
}
#ifdef DEBUG
NS_IMETHODIMP
nsHTMLStyleSheet::GenericTableRule::List(FILE* out, PRInt32 aIndent) const
{
return NS_OK;
}
#endif
nsHTMLStyleSheet::TableTHRule::TableTHRule(nsHTMLStyleSheet* aSheet)
: GenericTableRule(aSheet)
{
}
nsHTMLStyleSheet::TableTHRule::~TableTHRule()
{
}
static void PostResolveCallback(nsStyleStruct* aStyleStruct, nsRuleData* aRuleData)
{
nsStyleText* text = (nsStyleText*)aStyleStruct;
if (text->mTextAlign == NS_STYLE_TEXT_ALIGN_DEFAULT) {
nsStyleContext* parentContext = aRuleData->mStyleContext->GetParent();
if (parentContext) {
const nsStyleText* parentStyleText = parentContext->GetStyleText();
PRUint8 parentAlign = parentStyleText->mTextAlign;
text->mTextAlign = (NS_STYLE_TEXT_ALIGN_DEFAULT == parentAlign)
? NS_STYLE_TEXT_ALIGN_CENTER : parentAlign;
}
}
}
NS_IMETHODIMP
nsHTMLStyleSheet::TableTHRule::MapRuleInfoInto(nsRuleData* aRuleData)
{
if (aRuleData && aRuleData->mSID == eStyleStruct_Text) {
aRuleData->mCanStoreInRuleTree = PR_FALSE;
aRuleData->mPostResolveCallback = &PostResolveCallback;
}
return NS_OK;
}
static void
ProcessTableRulesAttribute(nsStyleStruct* aStyleStruct,
nsRuleData* aRuleData,
PRUint8 aSide,
PRBool aGroup,
PRUint8 aRulesArg1,
PRUint8 aRulesArg2,
PRUint8 aRulesArg3)
{
if (!aStyleStruct || !aRuleData || !aRuleData->mPresContext) return;
nsStyleContext* tableContext = aRuleData->mStyleContext->GetParent();
if (!tableContext)
return;
if (!aGroup) {
tableContext = tableContext->GetParent();
if (!tableContext)
return;
}
const nsStyleTable* tableData = tableContext->GetStyleTable();
if (aRulesArg1 == tableData->mRules ||
aRulesArg2 == tableData->mRules ||
aRulesArg3 == tableData->mRules) {
const nsStyleBorder* tableBorderData = tableContext->GetStyleBorder();
PRUint8 tableBorderStyle = tableBorderData->GetBorderStyle(aSide);
nsStyleBorder* borderData = (nsStyleBorder*)aStyleStruct;
if (!borderData)
return;
PRUint8 borderStyle = borderData->GetBorderStyle(aSide);
// XXX It appears that the style system erronously applies the custom style rule after css style,
// consequently it does not properly fit into the casade. For now, assume that a border style of none
// implies that the style has not been set.
// XXXldb No, there's nothing wrong with the style system. The problem
// is that the author of all these table rules made them work as
// post-resolve callbacks, which is an override mechanism that was meant
// to be used for other things. They should instead map their rule data
// normally (see nsIStyleRule.h).
if (NS_STYLE_BORDER_STYLE_NONE == borderStyle) {
// use the table's border style if it is dashed or dotted, otherwise use solid
PRUint8 bStyle = ((NS_STYLE_BORDER_STYLE_NONE != tableBorderStyle) &&
(NS_STYLE_BORDER_STYLE_HIDDEN != tableBorderStyle))
? tableBorderStyle : NS_STYLE_BORDER_STYLE_SOLID;
if ((NS_STYLE_BORDER_STYLE_DASHED != bStyle) &&
(NS_STYLE_BORDER_STYLE_DOTTED != bStyle) &&
(NS_STYLE_BORDER_STYLE_SOLID != bStyle)) {
bStyle = NS_STYLE_BORDER_STYLE_SOLID;
}
bStyle |= NS_STYLE_BORDER_STYLE_RULES_MASK;
borderData->SetBorderStyle(aSide, bStyle);
nscolor borderColor;
PRBool transparent, foreground;
borderData->GetBorderColor(aSide, borderColor, transparent, foreground);
if (transparent || foreground) {
// use the table's border color if it is set, otherwise use black
nscolor tableBorderColor;
tableBorderData->GetBorderColor(aSide, tableBorderColor, transparent, foreground);
borderColor = (transparent || foreground) ? NS_RGB(0,0,0) : tableBorderColor;
borderData->SetBorderColor(aSide, borderColor);
}
// set the border width to be 1 pixel
float p2t;
aRuleData->mPresContext->GetScaledPixelsToTwips(&p2t);
nscoord onePixel = NSToCoordRound(p2t);
nsStyleCoord coord(onePixel);
switch(aSide) {
case NS_SIDE_TOP:
borderData->mBorder.SetTop(coord);
break;
case NS_SIDE_RIGHT:
borderData->mBorder.SetRight(coord);
break;
case NS_SIDE_BOTTOM:
borderData->mBorder.SetBottom(coord);
break;
default: // NS_SIDE_LEFT
borderData->mBorder.SetLeft(coord);
break;
}
}
}
}
nsHTMLStyleSheet::TableTbodyRule::TableTbodyRule(nsHTMLStyleSheet* aSheet)
: GenericTableRule(aSheet)
{
}
nsHTMLStyleSheet::TableTbodyRule::~TableTbodyRule()
{
}
static void TbodyPostResolveCallback(nsStyleStruct* aStyleStruct, nsRuleData* aRuleData)
{
::ProcessTableRulesAttribute(aStyleStruct, aRuleData, NS_SIDE_TOP, PR_TRUE, NS_STYLE_TABLE_RULES_ALL,
NS_STYLE_TABLE_RULES_GROUPS, NS_STYLE_TABLE_RULES_ROWS);
::ProcessTableRulesAttribute(aStyleStruct, aRuleData, NS_SIDE_BOTTOM, PR_TRUE, NS_STYLE_TABLE_RULES_ALL,
NS_STYLE_TABLE_RULES_GROUPS, NS_STYLE_TABLE_RULES_ROWS);
}
NS_IMETHODIMP
nsHTMLStyleSheet::TableTbodyRule::MapRuleInfoInto(nsRuleData* aRuleData)
{
if (aRuleData && aRuleData->mSID == eStyleStruct_Border) {
aRuleData->mCanStoreInRuleTree = PR_FALSE;
aRuleData->mPostResolveCallback = &TbodyPostResolveCallback;
}
return NS_OK;
}
// -----------------------------------------------------------
nsHTMLStyleSheet::TableRowRule::TableRowRule(nsHTMLStyleSheet* aSheet)
: GenericTableRule(aSheet)
{
}
nsHTMLStyleSheet::TableRowRule::~TableRowRule()
{
}
static void RowPostResolveCallback(nsStyleStruct* aStyleStruct, nsRuleData* aRuleData)
{
::ProcessTableRulesAttribute(aStyleStruct, aRuleData, NS_SIDE_TOP, PR_FALSE, NS_STYLE_TABLE_RULES_ALL,
NS_STYLE_TABLE_RULES_ROWS, NS_STYLE_TABLE_RULES_ROWS);
::ProcessTableRulesAttribute(aStyleStruct, aRuleData, NS_SIDE_BOTTOM, PR_FALSE, NS_STYLE_TABLE_RULES_ALL,
NS_STYLE_TABLE_RULES_ROWS, NS_STYLE_TABLE_RULES_ROWS);
}
NS_IMETHODIMP
nsHTMLStyleSheet::TableRowRule::MapRuleInfoInto(nsRuleData* aRuleData)
{
if (aRuleData && aRuleData->mSID == eStyleStruct_Border) {
aRuleData->mCanStoreInRuleTree = PR_FALSE;
aRuleData->mPostResolveCallback = &RowPostResolveCallback;
}
return NS_OK;
}
nsHTMLStyleSheet::TableColgroupRule::TableColgroupRule(nsHTMLStyleSheet* aSheet)
: GenericTableRule(aSheet)
{
}
nsHTMLStyleSheet::TableColgroupRule::~TableColgroupRule()
{
}
static void ColgroupPostResolveCallback(nsStyleStruct* aStyleStruct, nsRuleData* aRuleData)
{
::ProcessTableRulesAttribute(aStyleStruct, aRuleData, NS_SIDE_LEFT, PR_TRUE, NS_STYLE_TABLE_RULES_ALL,
NS_STYLE_TABLE_RULES_GROUPS, NS_STYLE_TABLE_RULES_COLS);
::ProcessTableRulesAttribute(aStyleStruct, aRuleData, NS_SIDE_RIGHT, PR_TRUE, NS_STYLE_TABLE_RULES_ALL,
NS_STYLE_TABLE_RULES_GROUPS, NS_STYLE_TABLE_RULES_COLS);
}
NS_IMETHODIMP
nsHTMLStyleSheet::TableColgroupRule::MapRuleInfoInto(nsRuleData* aRuleData)
{
if (aRuleData && aRuleData->mSID == eStyleStruct_Border) {
aRuleData->mCanStoreInRuleTree = PR_FALSE;
aRuleData->mPostResolveCallback = &ColgroupPostResolveCallback;
}
return NS_OK;
}
nsHTMLStyleSheet::TableColRule::TableColRule(nsHTMLStyleSheet* aSheet)
: GenericTableRule(aSheet)
{
}
nsHTMLStyleSheet::TableColRule::~TableColRule()
{
}
static void ColPostResolveCallback(nsStyleStruct* aStyleStruct, nsRuleData* aRuleData)
{
::ProcessTableRulesAttribute(aStyleStruct, aRuleData, NS_SIDE_LEFT, PR_FALSE, NS_STYLE_TABLE_RULES_ALL,
NS_STYLE_TABLE_RULES_COLS, NS_STYLE_TABLE_RULES_COLS);
::ProcessTableRulesAttribute(aStyleStruct, aRuleData, NS_SIDE_RIGHT, PR_FALSE, NS_STYLE_TABLE_RULES_ALL,
NS_STYLE_TABLE_RULES_COLS, NS_STYLE_TABLE_RULES_COLS);
}
NS_IMETHODIMP
nsHTMLStyleSheet::TableColRule::MapRuleInfoInto(nsRuleData* aRuleData)
{
if (aRuleData && aRuleData->mSID == eStyleStruct_Border) {
aRuleData->mCanStoreInRuleTree = PR_FALSE;
aRuleData->mPostResolveCallback = &ColPostResolveCallback;
}
return NS_OK;
}
// -----------------------------------------------------------
struct MappedAttrTableEntry : public PLDHashEntryHdr {
nsMappedAttributes *mAttributes;
};
PR_STATIC_CALLBACK(PLDHashNumber)
MappedAttrTable_HashKey(PLDHashTable *table, const void *key)
{
nsMappedAttributes *attributes =
NS_STATIC_CAST(nsMappedAttributes*, NS_CONST_CAST(void*, key));
return attributes->HashValue();
}
PR_STATIC_CALLBACK(void)
MappedAttrTable_ClearEntry(PLDHashTable *table, PLDHashEntryHdr *hdr)
{
MappedAttrTableEntry *entry = NS_STATIC_CAST(MappedAttrTableEntry*, hdr);
entry->mAttributes->DropStyleSheetReference();
memset(entry, 0, sizeof(MappedAttrTableEntry));
}
PR_STATIC_CALLBACK(PRBool)
MappedAttrTable_MatchEntry(PLDHashTable *table, const PLDHashEntryHdr *hdr,
const void *key)
{
nsMappedAttributes *attributes =
NS_STATIC_CAST(nsMappedAttributes*, NS_CONST_CAST(void*, key));
const MappedAttrTableEntry *entry =
NS_STATIC_CAST(const MappedAttrTableEntry*, hdr);
return attributes->Equals(entry->mAttributes);
}
static PLDHashTableOps MappedAttrTable_Ops = {
PL_DHashAllocTable,
PL_DHashFreeTable,
PL_DHashGetKeyStub,
MappedAttrTable_HashKey,
MappedAttrTable_MatchEntry,
PL_DHashMoveEntryStub,
MappedAttrTable_ClearEntry,
PL_DHashFinalizeStub,
NULL
};
// -----------------------------------------------------------
nsHTMLStyleSheet::nsHTMLStyleSheet(void)
: mURL(nsnull),
mDocument(nsnull),
mLinkRule(nsnull),
mVisitedRule(nsnull),
mActiveRule(nsnull),
mDocumentColorRule(nsnull)
{
mMappedAttrTable.ops = nsnull;
}
nsresult
nsHTMLStyleSheet::Init()
{
mTableTbodyRule = new TableTbodyRule(this);
if (!mTableTbodyRule)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(mTableTbodyRule);
mTableRowRule = new TableRowRule(this);
if (!mTableRowRule)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(mTableRowRule);
mTableColgroupRule = new TableColgroupRule(this);
if (!mTableColgroupRule)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(mTableColgroupRule);
mTableColRule = new TableColRule(this);
if (!mTableColRule)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(mTableColRule);
mTableTHRule = new TableTHRule(this);
if (!mTableTHRule)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(mTableTHRule);
return NS_OK;
}
nsHTMLStyleSheet::~nsHTMLStyleSheet()
{
NS_IF_RELEASE(mURL);
if (nsnull != mLinkRule) {
mLinkRule->mSheet = nsnull;
NS_RELEASE(mLinkRule);
}
if (nsnull != mVisitedRule) {
mVisitedRule->mSheet = nsnull;
NS_RELEASE(mVisitedRule);
}
if (nsnull != mActiveRule) {
mActiveRule->mSheet = nsnull;
NS_RELEASE(mActiveRule);
}
if (nsnull != mDocumentColorRule) {
mDocumentColorRule->mSheet = nsnull;
NS_RELEASE(mDocumentColorRule);
}
if (nsnull != mTableTbodyRule) {
mTableTbodyRule->mSheet = nsnull;
NS_RELEASE(mTableTbodyRule);
}
if (nsnull != mTableRowRule) {
mTableRowRule->mSheet = nsnull;
NS_RELEASE(mTableRowRule);
}
if (nsnull != mTableColgroupRule) {
mTableColgroupRule->mSheet = nsnull;
NS_RELEASE(mTableColgroupRule);
}
if (nsnull != mTableColRule) {
mTableColRule->mSheet = nsnull;
NS_RELEASE(mTableColRule);
}
if (nsnull != mTableTHRule) {
mTableTHRule->mSheet = nsnull;
NS_RELEASE(mTableTHRule);
}
if (mMappedAttrTable.ops)
PL_DHashTableFinish(&mMappedAttrTable);
}
NS_IMPL_ISUPPORTS2(nsHTMLStyleSheet, nsIStyleSheet, nsIStyleRuleProcessor)
NS_IMETHODIMP
nsHTMLStyleSheet::GetStyleRuleProcessor(nsIStyleRuleProcessor*& aProcessor,
nsIStyleRuleProcessor* /*aPrevProcessor*/)
{
aProcessor = this;
NS_ADDREF(aProcessor);
return NS_OK;
}
static nsresult GetBodyColor(nsIPresContext* aPresContext, nscolor* aColor)
{
nsCOMPtr<nsIDocument> doc;
nsIPresShell *shell = aPresContext->PresShell();
shell->GetDocument(getter_AddRefs(doc));
nsCOMPtr<nsIDOMHTMLDocument> domdoc = do_QueryInterface(doc);
if (!domdoc)
return NS_ERROR_FAILURE;
nsCOMPtr<nsIDOMHTMLElement> body;
domdoc->GetBody(getter_AddRefs(body));
nsCOMPtr<nsIContent> bodyContent = do_QueryInterface(body);
nsIFrame *bodyFrame;
shell->GetPrimaryFrameFor(bodyContent, &bodyFrame);
if (!bodyFrame)
return NS_ERROR_FAILURE;
*aColor = bodyFrame->GetStyleColor()->mColor;
return NS_OK;
}
NS_IMETHODIMP
nsHTMLStyleSheet::RulesMatching(ElementRuleProcessorData* aData,
nsIAtom* aMedium)
{
nsIStyledContent *styledContent = aData->mStyledContent;
if (styledContent) {
nsRuleWalker *ruleWalker = aData->mRuleWalker;
if (aData->mIsHTMLContent) {
nsIAtom* tag = aData->mContentTag;
// if we have anchor colors, check if this is an anchor with an href
if (tag == nsHTMLAtoms::a) {
if (mLinkRule || mVisitedRule || mActiveRule) {
if (aData->mIsHTMLLink) {
switch (aData->mLinkState) {
case eLinkState_Unvisited:
if (mLinkRule)
ruleWalker->Forward(mLinkRule);
break;
case eLinkState_Visited:
if (mVisitedRule)
ruleWalker->Forward(mVisitedRule);
break;
default:
break;
}
// No need to add to the active rule if it's not a link
if (mActiveRule && (aData->mEventState & NS_EVENT_STATE_ACTIVE))
ruleWalker->Forward(mActiveRule);
}
} // end link/visited/active rules
} // end A tag
// add the rule to handle text-align for a <th>
else if (tag == nsHTMLAtoms::th) {
ruleWalker->Forward(mTableTHRule);
}
else if (tag == nsHTMLAtoms::tr) {
ruleWalker->Forward(mTableRowRule);
}
else if ((tag == nsHTMLAtoms::thead) || (tag == nsHTMLAtoms::tbody) || (tag == nsHTMLAtoms::tfoot)) {
ruleWalker->Forward(mTableTbodyRule);
}
else if (tag == nsHTMLAtoms::col) {
ruleWalker->Forward(mTableColRule);
}
else if (tag == nsHTMLAtoms::colgroup) {
ruleWalker->Forward(mTableColgroupRule);
}
else if (tag == nsHTMLAtoms::table) {
if (aData->mCompatMode == eCompatibility_NavQuirks) {
nscolor bodyColor;
nsresult rv =
GetBodyColor(ruleWalker->GetCurrentNode()->GetPresContext(),
&bodyColor);
if (NS_SUCCEEDED(rv) &&
(!mDocumentColorRule || bodyColor != mDocumentColorRule->mColor)) {
if (mDocumentColorRule) {
mDocumentColorRule->mSheet = nsnull;
NS_RELEASE(mDocumentColorRule);
}
mDocumentColorRule = new HTMLColorRule(this);
if (mDocumentColorRule) {
NS_ADDREF(mDocumentColorRule);
mDocumentColorRule->mColor = bodyColor;
}
}
if (mDocumentColorRule)
ruleWalker->Forward(mDocumentColorRule);
}
}
} // end html element
// just get the style rules from the content
styledContent->WalkContentStyleRules(ruleWalker);
}
return NS_OK;
}
// Test if style is dependent on content state
NS_IMETHODIMP
nsHTMLStyleSheet::HasStateDependentStyle(StateRuleProcessorData* aData,
nsIAtom* aMedium,
nsReStyleHint* aResult)
{
if (mActiveRule &&
(aData->mStateMask & NS_EVENT_STATE_ACTIVE) &&
aData->mStyledContent &&
aData->mIsHTMLContent &&
aData->mIsHTMLLink &&
aData->mContentTag == nsHTMLAtoms::a)
*aResult = eReStyle_Self;
else
*aResult = nsReStyleHint(0);
return NS_OK;
}
NS_IMETHODIMP
nsHTMLStyleSheet::HasAttributeDependentStyle(AttributeRuleProcessorData* aData,
nsIAtom* aMedium,
nsReStyleHint* aResult)
{
// Result is true for |href| changes on HTML links if we have link rules.
nsIStyledContent *styledContent = aData->mStyledContent;
if (aData->mAttribute == nsHTMLAtoms::href &&
(mLinkRule || mVisitedRule || mActiveRule) &&
styledContent &&
styledContent->IsContentOfType(nsIContent::eHTML) &&
aData->mContentTag == nsHTMLAtoms::a) {
*aResult = eReStyle_Self;
return NS_OK;
}
// Don't worry about the mDocumentColorRule since it only applies
// to descendants of body, when we're already reresolving.
// Handle the content style rules.
if (styledContent && styledContent->IsAttributeMapped(aData->mAttribute)) {
*aResult = eReStyle_Self;
return NS_OK;
}
*aResult = nsReStyleHint(0);
return NS_OK;
}
NS_IMETHODIMP
nsHTMLStyleSheet::RulesMatching(PseudoRuleProcessorData* aData,
nsIAtom* aMedium)
{
nsIAtom* pseudoTag = aData->mPseudoTag;
if (pseudoTag == nsCSSAnonBoxes::tableCol) {
nsRuleWalker *ruleWalker = aData->mRuleWalker;
if (ruleWalker) {
ruleWalker->Forward(mTableColRule);
}
}
return NS_OK;
}
// nsIStyleSheet api
NS_IMETHODIMP
nsHTMLStyleSheet::GetURL(nsIURI*& aURL) const
{
aURL = mURL;
NS_IF_ADDREF(aURL);
return NS_OK;
}
NS_IMETHODIMP
nsHTMLStyleSheet::GetTitle(nsString& aTitle) const
{
aTitle.Truncate();
return NS_OK;
}
NS_IMETHODIMP
nsHTMLStyleSheet::GetType(nsString& aType) const
{
aType.Assign(NS_LITERAL_STRING("text/html"));
return NS_OK;
}
NS_IMETHODIMP
nsHTMLStyleSheet::GetMediumCount(PRInt32& aCount) const
{
aCount = 0;
return NS_OK;
}
NS_IMETHODIMP
nsHTMLStyleSheet::GetMediumAt(PRInt32 aIndex, nsIAtom*& aMedium) const
{
aMedium = nsnull;
return NS_ERROR_INVALID_ARG;
}
NS_IMETHODIMP_(PRBool)
nsHTMLStyleSheet::UseForMedium(nsIAtom* aMedium) const
{
return PR_TRUE; // works for all media
}
NS_IMETHODIMP_(PRBool)
nsHTMLStyleSheet::HasRules() const
{
return PR_TRUE; // We have rules at all reasonable times
}
NS_IMETHODIMP
nsHTMLStyleSheet::GetApplicable(PRBool& aApplicable) const
{
aApplicable = PR_TRUE;
return NS_OK;
}
NS_IMETHODIMP
nsHTMLStyleSheet::SetEnabled(PRBool aEnabled)
{ // these can't be disabled
return NS_OK;
}
NS_IMETHODIMP
nsHTMLStyleSheet::GetComplete(PRBool& aComplete) const
{
aComplete = PR_TRUE;
return NS_OK;
}
NS_IMETHODIMP
nsHTMLStyleSheet::SetComplete()
{
return NS_OK;
}
NS_IMETHODIMP
nsHTMLStyleSheet::GetParentSheet(nsIStyleSheet*& aParent) const
{
aParent = nsnull;
return NS_OK;
}
NS_IMETHODIMP
nsHTMLStyleSheet::GetOwningDocument(nsIDocument*& aDocument) const
{
aDocument = mDocument;
NS_IF_ADDREF(aDocument);
return NS_OK;
}
NS_IMETHODIMP
nsHTMLStyleSheet::SetOwningDocument(nsIDocument* aDocument)
{
mDocument = aDocument; // not refcounted
return NS_OK;
}
nsresult
nsHTMLStyleSheet::Init(nsIURI* aURL, nsIDocument* aDocument)
{
NS_PRECONDITION(aURL && aDocument, "null ptr");
if (! aURL || ! aDocument)
return NS_ERROR_NULL_POINTER;
if (mURL || mDocument)
return NS_ERROR_ALREADY_INITIALIZED;
mDocument = aDocument; // not refcounted!
mURL = aURL;
NS_ADDREF(mURL);
return NS_OK;
}
nsresult
nsHTMLStyleSheet::Reset(nsIURI* aURL)
{
NS_IF_RELEASE(mURL);
mURL = aURL;
NS_ADDREF(mURL);
if (mLinkRule) {
mLinkRule->mSheet = nsnull;
NS_RELEASE(mLinkRule);
}
if (mVisitedRule) {
mVisitedRule->mSheet = nsnull;
NS_RELEASE(mVisitedRule);
}
if (mActiveRule) {
mActiveRule->mSheet = nsnull;
NS_RELEASE(mActiveRule);
}
if (mDocumentColorRule) {
mDocumentColorRule->mSheet = nsnull;
NS_RELEASE(mDocumentColorRule);
}
if (mMappedAttrTable.ops) {
PL_DHashTableFinish(&mMappedAttrTable);
mMappedAttrTable.ops = nsnull;
}
return NS_OK;
}
nsresult
nsHTMLStyleSheet::GetLinkColor(nscolor& aColor)
{
if (!mLinkRule) {
return NS_HTML_STYLE_PROPERTY_NOT_THERE;
}
else {
aColor = mLinkRule->mColor;
return NS_OK;
}
}
nsresult
nsHTMLStyleSheet::GetActiveLinkColor(nscolor& aColor)
{
if (!mActiveRule) {
return NS_HTML_STYLE_PROPERTY_NOT_THERE;
}
else {
aColor = mActiveRule->mColor;
return NS_OK;
}
}
nsresult
nsHTMLStyleSheet::GetVisitedLinkColor(nscolor& aColor)
{
if (!mVisitedRule) {
return NS_HTML_STYLE_PROPERTY_NOT_THERE;
}
else {
aColor = mVisitedRule->mColor;
return NS_OK;
}
}
nsresult
nsHTMLStyleSheet::SetLinkColor(nscolor aColor)
{
if (mLinkRule) {
if (mLinkRule->mColor == aColor)
return NS_OK;
mLinkRule->mSheet = nsnull;
NS_RELEASE(mLinkRule);
}
mLinkRule = new HTMLColorRule(this);
if (!mLinkRule)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(mLinkRule);
mLinkRule->mColor = aColor;
return NS_OK;
}
nsresult
nsHTMLStyleSheet::SetActiveLinkColor(nscolor aColor)
{
if (mActiveRule) {
if (mActiveRule->mColor == aColor)
return NS_OK;
mActiveRule->mSheet = nsnull;
NS_RELEASE(mActiveRule);
}
mActiveRule = new HTMLColorRule(this);
if (!mActiveRule)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(mActiveRule);
mActiveRule->mColor = aColor;
return NS_OK;
}
nsresult
nsHTMLStyleSheet::SetVisitedLinkColor(nscolor aColor)
{
if (mVisitedRule) {
if (mVisitedRule->mColor == aColor)
return NS_OK;
mVisitedRule->mSheet = nsnull;
NS_RELEASE(mVisitedRule);
}
mVisitedRule = new HTMLColorRule(this);
if (!mVisitedRule)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(mVisitedRule);
mVisitedRule->mColor = aColor;
return NS_OK;
}
already_AddRefed<nsMappedAttributes>
nsHTMLStyleSheet::UniqueMappedAttributes(nsMappedAttributes* aMapped)
{
if (!mMappedAttrTable.ops) {
PRBool res = PL_DHashTableInit(&mMappedAttrTable, &MappedAttrTable_Ops,
nsnull, sizeof(MappedAttrTableEntry), 16);
if (!res) {
mMappedAttrTable.ops = nsnull;
return nsnull;
}
}
MappedAttrTableEntry *entry = NS_STATIC_CAST(MappedAttrTableEntry*,
PL_DHashTableOperate(&mMappedAttrTable, aMapped, PL_DHASH_ADD));
if (!entry)
return nsnull;
if (!entry->mAttributes) {
// We added a new entry to the hashtable, so we have a new unique set.
entry->mAttributes = aMapped;
}
NS_ADDREF(entry->mAttributes); // for caller
return entry->mAttributes;
}
void
nsHTMLStyleSheet::DropMappedAttributes(nsMappedAttributes* aMapped)
{
NS_ENSURE_TRUE(aMapped, /**/);
NS_ASSERTION(mMappedAttrTable.ops, "table uninitialized");
#ifdef DEBUG
PRUint32 entryCount = mMappedAttrTable.entryCount - 1;
#endif
PL_DHashTableOperate(&mMappedAttrTable, aMapped, PL_DHASH_REMOVE);
NS_ASSERTION(entryCount == mMappedAttrTable.entryCount, "not removed");
}
#ifdef DEBUG
void nsHTMLStyleSheet::List(FILE* out, PRInt32 aIndent) const
{
// Indent
for (PRInt32 index = aIndent; --index >= 0; ) fputs(" ", out);
fputs("HTML Style Sheet: ", out);
nsCAutoString urlSpec;
mURL->GetSpec(urlSpec);
if (!urlSpec.IsEmpty()) {
fputs(urlSpec.get(), out);
}
fputs("\n", out);
}
#endif
// XXX For convenience and backwards compatibility
nsresult
NS_NewHTMLStyleSheet(nsHTMLStyleSheet** aInstancePtrResult, nsIURI* aURL,
nsIDocument* aDocument)
{
nsresult rv;
nsHTMLStyleSheet* sheet;
if (NS_FAILED(rv = NS_NewHTMLStyleSheet(&sheet)))
return rv;
if (NS_FAILED(rv = sheet->Init(aURL, aDocument))) {
NS_RELEASE(sheet);
return rv;
}
*aInstancePtrResult = sheet;
return NS_OK;
}
nsresult
NS_NewHTMLStyleSheet(nsHTMLStyleSheet** aInstancePtrResult)
{
NS_ASSERTION(aInstancePtrResult, "null out param");
nsHTMLStyleSheet *it = new nsHTMLStyleSheet();
if (!it) {
*aInstancePtrResult = nsnull;
return NS_ERROR_OUT_OF_MEMORY;
}
NS_ADDREF(it);
nsresult rv = it->Init();
if (NS_FAILED(rv))
NS_RELEASE(it);
*aInstancePtrResult = it; // NS_ADDREF above, or set to null by NS_RELEASE
return rv;
}
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