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gecko-dev/layout/style/nsCSSParser.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#include "nsICSSParser.h"
#include "nsCSSProps.h"
#include "nsCSSKeywords.h"
#include "nsCSSScanner.h"
#include "nsICSSStyleRule.h"
#include "nsIUnicharInputStream.h"
#include "nsIStyleSet.h"
#include "nsICSSStyleSheet.h"
#include "nsICSSDeclaration.h"
#include "nsStyleConsts.h"
#include "nsIURL.h"
#include "nsString.h"
#include "nsIAtom.h"
#include "nsVoidArray.h"
#include "nsColor.h"
#include "nsStyleConsts.h"
// XXX TODO:
// - rework aErrorCode stuff: switch over to nsresult
// - bug: "color: red {fish};" emits a property for color instead of zapping it
static NS_DEFINE_IID(kICSSParserIID, NS_ICSS_PARSER_IID);
static NS_DEFINE_IID(kICSSStyleSheetIID, NS_ICSS_STYLE_SHEET_IID);
static NS_DEFINE_IID(kIStyleSheetIID, NS_ISTYLE_SHEET_IID);
// XXX cell-padding, spacing, etc.???
struct Selector {
nsString mTag; // weight 1
nsString mID; // weight 100
nsString mClass; // weight 10
nsString mPseudoClass; // weight 10 (== class)
nsString mPseudoElement; // weight 10 (== class) ??
PRUint32 mMask; // which fields have values
Selector();
~Selector();
PRInt32 Weight() const;
#ifdef NS_DEBUG
void Dump() const;
#endif
};
#define SELECTOR_TAG 0x01
#define SELECTOR_ID 0x02
#define SELECTOR_CLASS 0x04
#define SELECTOR_PSEUDO_CLASS 0x08
#define SELECTOR_PSEUDO_ELEMENT 0x10
#define SELECTOR_WEIGHT_BASE 10
Selector::Selector()
{
mMask = 0;
}
Selector::~Selector()
{
}
PRInt32 Selector::Weight() const
{
return (((0 != (SELECTOR_TAG & mMask)) ? 1 : 0) +
((0 != (SELECTOR_ID & mMask)) ? (SELECTOR_WEIGHT_BASE * SELECTOR_WEIGHT_BASE) : 0) +
((0 != ((SELECTOR_CLASS | SELECTOR_PSEUDO_CLASS | SELECTOR_PSEUDO_ELEMENT) & mMask)) ? SELECTOR_WEIGHT_BASE : 0));
}
#ifdef NS_DEBUG
void Selector::Dump() const
{
PRBool needSpace = PR_FALSE;
if (mTag.Length() > 0) {
fputs(mTag, stdout);
needSpace = PR_TRUE;
}
if (mID.Length() > 0) {
if (needSpace) fputs(" ", stdout);
fputs("#", stdout);
fputs(mID, stdout);
needSpace = PR_TRUE;
}
if (mClass.Length() > 0) {
if (needSpace) fputs(" ", stdout);
fputs(".", stdout);
fputs(mClass, stdout);
needSpace = PR_TRUE;
}
if (mPseudoClass.Length() > 0) {
if (needSpace) fputs(" ", stdout);
fputs(":", stdout);
fputs(mPseudoClass, stdout);
needSpace = PR_TRUE;
}
if (mPseudoElement.Length() > 0) {
if (needSpace) fputs(" ", stdout);
fputs(":", stdout);
fputs(mPseudoElement, stdout);
needSpace = PR_TRUE;
}
}
#endif
// e.g. "P B, H1 B { ... }" has a selector list with two elements,
// each of which has two selectors.
struct SelectorList {
SelectorList* mNext;
nsVoidArray mSelectors;
SelectorList();
void Destroy();
void AddSelector(Selector* aSelector) {
mSelectors.AppendElement(aSelector);
}
#ifdef NS_DEBUG
void Dump();
#endif
private:
~SelectorList();
};
SelectorList::SelectorList()
{
mNext = nsnull;
}
SelectorList::~SelectorList()
{
PRInt32 n = mSelectors.Count();
for (PRInt32 i = 0; i < n; i++) {
Selector* sel = (Selector*) mSelectors.ElementAt(i);
delete sel;
}
}
void SelectorList::Destroy()
{
SelectorList* list = this;
while (nsnull != list) {
SelectorList* next = list->mNext;
delete list;
list = next;
}
}
#ifdef NS_DEBUG
void SelectorList::Dump()
{
PRInt32 n = mSelectors.Count();
for (PRInt32 i = 0; i < n; i++) {
Selector* sel = (Selector*) mSelectors.ElementAt(i);
sel->Dump();
fputs(" ", stdout);
}
if (mNext) {
fputs(", ", stdout);
mNext->Dump();
}
}
#endif
//----------------------------------------------------------------------
// Your basic top-down recursive descent style parser
class CSSParserImpl : public nsICSSParser {
public:
CSSParserImpl();
CSSParserImpl(nsICSSStyleSheet* aSheet);
~CSSParserImpl();
NS_DECL_ISUPPORTS
NS_IMETHOD GetInfoMask(PRUint32& aResult);
NS_IMETHOD SetStyleSheet(nsIStyleSheet* aSheet);
NS_IMETHOD Parse(nsIUnicharInputStream* aInput,
nsIURL* aInputURL,
nsIStyleSheet*& aResult);
NS_IMETHOD ParseDeclarations(const nsString& aDeclaration,
nsIURL* aBaseURL,
nsIStyleRule*& aResult);
protected:
PRBool GetToken(PRInt32* aErrorCode, PRBool aSkipWS);
void UngetToken();
PRBool ExpectSymbol(PRInt32* aErrorCode, char aSymbol, PRBool aSkipWS);
nsString* NextIdent(PRInt32* aErrorCode);
void SkipUntil(PRInt32* aErrorCode, PRUnichar aStopSymbol);
void SkipRuleSet(PRInt32* aErrorCode);
PRBool SkipDeclaration(PRInt32* aErrorCode, PRBool aCheckForBraces);
PRBool ParseRuleSet(PRInt32* aErrorCode);
PRBool ParseAtRule(PRInt32* aErrorCode);
PRBool ParseImportRule(PRInt32* aErrorCode);
PRBool ParseSelectorGroup(PRInt32* aErrorCode, SelectorList* aListHead);
PRBool ParseSelectorList(PRInt32* aErrorCode, SelectorList* aListHead);
PRBool ParseSelector(PRInt32* aErrorCode, Selector* aSelectorResult);
nsICSSDeclaration* ParseDeclarationBlock(PRInt32* aErrorCode,
PRBool aCheckForBraces);
PRBool ParseDeclaration(PRInt32* aErrorCode,
nsICSSDeclaration* aDeclaration,
PRBool aCheckForBraces);
PRBool ParseProperty(PRInt32* aErrorCode, const char* aName,
nsICSSDeclaration* aDeclaration);
PRBool ParseProperty(PRInt32* aErrorCode, const char* aName,
nsICSSDeclaration* aDeclaration, PRInt32 aID);
// Property specific parsing routines
PRBool ParseBackground(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration);
PRBool ParseBackgroundFilter(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration,
const char* aName);
PRBool ParseForegroundFilter(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration,
const char* aName);
PRBool ParseBackgroundPosition(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration,
const char* aName);
PRBool ParseBorder(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration);
PRBool ParseBorderColor(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration);
PRBool ParseBorderSide(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration,
const char* aNames[], PRInt32 aWhichSide);
PRBool ParseBorderStyle(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration);
PRBool ParseBorderWidth(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration);
PRBool ParseClip(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration);
PRBool ParseFont(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration,
const char* aName);
PRBool ParseFontFamily(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration,
const char* aName);
PRBool ParseFontWeight(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration,
const char* aName);
PRBool ParseListStyle(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration);
PRBool ParseMargin(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration);
PRBool ParsePadding(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration);
PRBool ParseTextDecoration(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration,
const char* aName);
// Reused utility parsing routines
PRBool ParseBoxProperties(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration,
const char* aNames[]);
PRInt32 ParseChoice(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration,
const char* aNames[], PRInt32 aNumNames);
PRBool ParseColor(PRInt32* aErrorCode, nscolor* aColorResult);
PRBool ParseColorComponent(PRInt32* aErrorCode, PRUint8* aComponent,
char aStop);
PRBool ParseEnum(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration,
const char* aName, PRInt32* aTable);
PRInt32 SearchKeywordTable(PRInt32 aID, PRInt32 aTable[]);
PRBool ParseVariant(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration,
const char* aName, PRInt32 aVariant,
PRInt32* aTable);
PRBool TranslateLength(nsICSSDeclaration* aDeclaration, const char* aName,
float aNumber, const nsString& aDimension);
void ProcessImport(const nsString& aURLSpec);
// Current token. The value is valid after calling GetToken
nsCSSToken mToken;
// After an UngetToken is done this flag is true. The next call to
// GetToken clears the flag.
PRBool mHavePushBack;
nsCSSScanner* mScanner;
nsIURL* mURL;
nsICSSStyleSheet* mSheet;
PRBool mInHead;
};
NS_HTML nsresult
NS_NewCSSParser(nsICSSParser** aInstancePtrResult)
{
CSSParserImpl *it = new CSSParserImpl();
if (it == nsnull) {
return NS_ERROR_OUT_OF_MEMORY;
}
return it->QueryInterface(kICSSParserIID, (void **) aInstancePtrResult);
}
CSSParserImpl::CSSParserImpl()
{
NS_INIT_REFCNT();
mScanner = nsnull;
mSheet = nsnull;
mHavePushBack = PR_FALSE;
}
CSSParserImpl::CSSParserImpl(nsICSSStyleSheet* aSheet)
{
NS_INIT_REFCNT();
mScanner = nsnull;
mSheet = aSheet; aSheet->AddRef();
mHavePushBack = PR_FALSE;
}
NS_IMPL_ISUPPORTS(CSSParserImpl,kICSSParserIID)
CSSParserImpl::~CSSParserImpl()
{
NS_IF_RELEASE(mSheet);
}
NS_METHOD
CSSParserImpl::GetInfoMask(PRUint32& aResult)
{
aResult = NS_CSS_GETINFO_CSS1 | NS_CSS_GETINFO_CSSP;
return NS_OK;
}
NS_METHOD
CSSParserImpl::SetStyleSheet(nsIStyleSheet* aSheet)
{
NS_PRECONDITION(nsnull != aSheet, "null ptr");
if (nsnull == aSheet) {
return NS_ERROR_NULL_POINTER;
}
// Make sure the sheet supports the correct interface!
static NS_DEFINE_IID(kICSSStyleSheetIID, NS_ICSS_STYLE_SHEET_IID);
nsICSSStyleSheet* cssSheet;
nsresult rv = aSheet->QueryInterface(kICSSStyleSheetIID, (void**)&cssSheet);
if (NS_OK != rv) {
return rv;
}
// Switch to using the new sheet
NS_IF_RELEASE(mSheet);
mSheet = cssSheet;
return NS_OK;
}
NS_METHOD
CSSParserImpl::Parse(nsIUnicharInputStream* aInput,
nsIURL* aInputURL,
nsIStyleSheet*& aResult)
{
if (nsnull == mSheet) {
NS_NewCSSStyleSheet(&mSheet, aInputURL);
}
PRInt32 errorCode = NS_OK;
mScanner = new nsCSSScanner();
mScanner->Init(aInput);
mURL = aInputURL;
if (nsnull != aInputURL) {
aInputURL->AddRef();
}
mInHead = PR_TRUE;
nsCSSToken* tk = &mToken;
for (;;) {
// Get next non-whitespace token
if (!GetToken(&errorCode, PR_TRUE)) {
break;
}
if (eCSSToken_AtKeyword == tk->mType) {
ParseAtRule(&errorCode);
continue;
} else if (eCSSToken_Symbol == tk->mType) {
// Discard dangling semicolons. This is not part of the CSS1
// forward compatible parsing spec, but it makes alot of sense.
if (';' == tk->mSymbol) {
continue;
}
}
mInHead = PR_FALSE;
UngetToken();
ParseRuleSet(&errorCode);
}
delete mScanner;
mScanner = nsnull;
NS_IF_RELEASE(mURL);
nsIStyleSheet* sheet = nsnull;
mSheet->QueryInterface(kIStyleSheetIID, (void**)&sheet);
aResult = sheet;
return NS_OK;
}
NS_METHOD
CSSParserImpl::ParseDeclarations(const nsString& aDeclaration,
nsIURL* aBaseURL,
nsIStyleRule*& aResult)
{
nsString* str = new nsString(aDeclaration);
if (nsnull == str) {
return NS_ERROR_OUT_OF_MEMORY;
}
nsIUnicharInputStream* input = nsnull;
nsresult rv = NS_NewStringUnicharInputStream(&input, str);
if (NS_OK != rv) {
return rv;
}
mScanner = new nsCSSScanner();
mScanner->Init(input);
NS_RELEASE(input);
mURL = aBaseURL;
NS_IF_ADDREF(mURL);
mInHead = PR_FALSE;
PRInt32 errorCode = NS_OK;
nsICSSDeclaration* declaration = ParseDeclarationBlock(&errorCode, PR_FALSE);
if (nsnull != declaration) {
// Create a style rule for the delcaration
nsICSSStyleRule* rule = nsnull;
NS_NewCSSStyleRule(&rule, nsCSSSelector());
rule->SetDeclaration(declaration);
rule->SetWeight(0x7fffffff);
aResult = rule;
}
else {
aResult = nsnull;
}
delete mScanner;
mScanner = nsnull;
NS_IF_RELEASE(mURL);
return NS_OK;
}
//----------------------------------------------------------------------
PRBool CSSParserImpl::GetToken(PRInt32* aErrorCode, PRBool aSkipWS)
{
for (;;) {
if (!mHavePushBack) {
if (!mScanner->Next(aErrorCode, &mToken)) {
break;
}
}
mHavePushBack = PR_FALSE;
if (aSkipWS && (eCSSToken_WhiteSpace == mToken.mType)) {
continue;
}
return PR_TRUE;
}
return PR_FALSE;
}
void CSSParserImpl::UngetToken()
{
NS_PRECONDITION(mHavePushBack == PR_FALSE, "double pushback");
mHavePushBack = PR_TRUE;
}
PRBool CSSParserImpl::ExpectSymbol(PRInt32* aErrorCode,
char aSymbol,
PRBool aSkipWS)
{
if (!GetToken(aErrorCode, aSkipWS)) {
return PR_FALSE;
}
nsCSSToken* tk = &mToken;
if ((eCSSToken_Symbol == tk->mType) && (aSymbol == tk->mSymbol)) {
return PR_TRUE;
}
UngetToken();
return PR_FALSE;
}
nsString* CSSParserImpl::NextIdent(PRInt32* aErrorCode)
{
if (!GetToken(aErrorCode, PR_TRUE)) {
return nsnull;
}
if (eCSSToken_Ident != mToken.mType) {
UngetToken();
return nsnull;
}
return &mToken.mIdent;
}
// XXX @media type {, types } '{' rules '}'
// XXX @font-face
// XXX @page { :left | :right } '{' declarations '}'
PRBool CSSParserImpl::ParseAtRule(PRInt32* aErrorCode)
{
nsCSSToken* tk = &mToken;
if (mInHead && tk->mIdent.EqualsIgnoreCase("import")) {
ParseImportRule(aErrorCode);
return PR_TRUE;
}
// Skip over unsupported at rule
for (;;) {
if (!GetToken(aErrorCode, PR_TRUE)) {
return PR_FALSE;
}
if (eCSSToken_Symbol == tk->mType) {
PRUnichar symbol = tk->mSymbol;
if (symbol == ';') {
break;
}
if (symbol == '{') {
SkipUntil(aErrorCode, '}');
break;
} else if (symbol == '(') {
SkipUntil(aErrorCode, ')');
} else if (symbol == '[') {
SkipUntil(aErrorCode, ']');
}
}
}
mInHead = PR_FALSE;
return PR_TRUE;
}
// Parse a CSS1 import rule: "@import STRING | URL"
PRBool CSSParserImpl::ParseImportRule(PRInt32* aErrorCode)
{
nsCSSToken* tk = &mToken;
if (!GetToken(aErrorCode, PR_TRUE)) {
return PR_FALSE;
}
if ((eCSSToken_String == tk->mType) || (eCSSToken_URL == tk->mType)) {
if (ExpectSymbol(aErrorCode, ';', PR_TRUE)) {
ProcessImport(tk->mIdent);
return PR_TRUE;
}
if ((eCSSToken_Symbol != tk->mType) || (';' != tk->mSymbol)) {
SkipUntil(aErrorCode, ';');
}
}
mInHead = PR_FALSE;
return PR_TRUE;
}
void CSSParserImpl::ProcessImport(const nsString& aURLSpec)
{
// XXX probably need a way to encode unicode junk for the part of
// the url that follows a "?"
char* cp = aURLSpec.ToNewCString();
nsIURL* url;
nsresult rv = NS_NewURL(&url, mURL, cp);
delete cp;
if (NS_OK != rv) {
// import url is bad
// XXX log this somewhere for easier web page debugging
return;
}
if (PR_FALSE == mSheet->ContainsStyleSheet(url)) { // don't allow circular references
PRInt32 ec;
nsIInputStream* in = url->Open(&ec);
if (nsnull == in) {
// failure to make connection
// XXX log this somewhere for easier web page debugging
}
else {
nsIUnicharInputStream* uin;
rv = NS_NewConverterStream(&uin, nsnull, in);
if (NS_OK != rv) {
// XXX no iso-latin-1 converter? out of memory?
NS_RELEASE(in);
}
else {
NS_RELEASE(in);
// Create a new parse to parse the import.
if (NS_OK == rv) {
nsICSSParser* parser;
rv = NS_NewCSSParser(&parser);
if (NS_OK == rv) {
nsIStyleSheet* childSheet = nsnull;
rv = parser->Parse(uin, url, childSheet);
NS_RELEASE(parser);
if ((NS_OK == rv) && (nsnull != childSheet)) {
nsICSSStyleSheet* cssChild = nsnull;
if (NS_OK == childSheet->QueryInterface(kICSSStyleSheetIID, (void**)&cssChild)) {
mSheet->AppendStyleSheet(cssChild);
NS_RELEASE(cssChild);
}
}
NS_IF_RELEASE(childSheet);
}
}
NS_RELEASE(uin);
}
}
}
NS_RELEASE(url);
}
void CSSParserImpl::SkipUntil(PRInt32* aErrorCode, PRUnichar aStopSymbol)
{
nsCSSToken* tk = &mToken;
for (;;) {
if (!GetToken(aErrorCode, PR_TRUE)) {
break;
}
if (eCSSToken_Symbol == tk->mType) {
PRUnichar symbol = tk->mSymbol;
if (symbol == aStopSymbol) {
break;
} else if ('{' == symbol) {
SkipUntil(aErrorCode, '}');
} else if ('[' == symbol) {
SkipUntil(aErrorCode, ']');
} else if ('(' == symbol) {
SkipUntil(aErrorCode, ')');
}
}
}
}
PRBool
CSSParserImpl::SkipDeclaration(PRInt32* aErrorCode, PRBool aCheckForBraces)
{
nsCSSToken* tk = &mToken;
for (;;) {
if (!GetToken(aErrorCode, PR_TRUE)) {
return PR_FALSE;
}
if (eCSSToken_Symbol == tk->mType) {
PRUnichar symbol = tk->mSymbol;
if (';' == symbol) {
break;
}
if (aCheckForBraces) {
if ('}' == symbol) {
UngetToken();
break;
}
}
if ('{' == symbol) {
SkipUntil(aErrorCode, '}');
} else if ('(' == symbol) {
SkipUntil(aErrorCode, ')');
} else if ('[' == symbol) {
SkipUntil(aErrorCode, ']');
}
}
}
return PR_TRUE;
}
void CSSParserImpl::SkipRuleSet(PRInt32* aErrorCode)
{
nsCSSToken* tk = &mToken;
for (;;) {
if (!GetToken(aErrorCode, PR_TRUE)) {
break;
}
if (eCSSToken_Symbol == tk->mType) {
PRUnichar symbol = tk->mSymbol;
if ('{' == symbol) {
SkipUntil(aErrorCode, '}');
break;
}
if ('(' == symbol) {
SkipUntil(aErrorCode, ')');
} else if ('[' == symbol) {
SkipUntil(aErrorCode, ']');
}
}
}
}
PRBool CSSParserImpl::ParseRuleSet(PRInt32* aErrorCode)
{
nsCSSToken* tk = &mToken;
// First get the list of selectors for the rule
SelectorList *slist = new SelectorList();
if (!ParseSelectorList(aErrorCode, slist)) {
SkipRuleSet(aErrorCode);
slist->Destroy();
return PR_FALSE;
}
// Next parse the declaration block
nsICSSDeclaration* declaration = ParseDeclarationBlock(aErrorCode, PR_TRUE);
if (nsnull == declaration) {
// XXX skip something here
slist->Destroy();
return PR_FALSE;
}
#if 0
slist->Dump();
fputs("{\n", stdout);
declaration->List();
fputs("}\n", stdout);
#endif
// Translate the selector list and declaration block into style data
SelectorList* list = slist;
nsCSSSelector selector;
nsICSSStyleRule* rule = nsnull;
while (nsnull != list) {
PRInt32 selIndex = list->mSelectors.Count();
Selector* sel = (Selector*)list->mSelectors[--selIndex];
if (0 < sel->mPseudoElement.Length()) { // only pseudo elements at end selector
nsString nullStr;
selector.Set(sel->mPseudoElement, nullStr, nullStr, nullStr);
NS_NewCSSStyleRule(&rule, selector);
}
selector.Set(sel->mTag, sel->mID, sel->mClass, sel->mPseudoClass);
PRInt32 weight = sel->Weight();
if (nsnull == rule) {
NS_NewCSSStyleRule(&rule, selector);
}
else {
rule->AddSelector(selector);
}
if (nsnull != rule) {
while (--selIndex >= 0) {
Selector* sel = (Selector*)list->mSelectors[selIndex];
selector.Set(sel->mTag, sel->mID, sel->mClass, sel->mPseudoClass);
rule->AddSelector(selector);
weight += sel->Weight();
}
rule->SetDeclaration(declaration);
rule->SetWeight(weight);
// rule->List();
mSheet->AppendStyleRule(rule);
NS_RELEASE(rule);
}
list = list->mNext;
}
// Release temporary storage
slist->Destroy();
NS_RELEASE(declaration);
return PR_TRUE;
}
PRBool CSSParserImpl::ParseSelectorList(PRInt32* aErrorCode,
SelectorList* aListHead)
{
if (!ParseSelectorGroup(aErrorCode, aListHead)) {
// must have at least one selector group
return PR_FALSE;
}
// After that there must either be a "," or a "{"
nsCSSToken* tk = &mToken;
for (;;) {
if (!GetToken(aErrorCode, PR_TRUE)) {
return PR_FALSE;
}
if (eCSSToken_Symbol != tk->mType) {
UngetToken();
return PR_FALSE;
}
if (',' == tk->mSymbol) {
// Another selector group must follow
SelectorList* newList = new SelectorList();
if (!ParseSelectorGroup(aErrorCode, newList)) {
newList->Destroy();
return PR_FALSE;
}
// add new list to the end of the selector list
aListHead->mNext = newList;
aListHead = newList;
continue;
} else if ('{' == tk->mSymbol) {
UngetToken();
break;
} else {
UngetToken();
return PR_FALSE;
}
}
return PR_TRUE;
}
PRBool CSSParserImpl::ParseSelectorGroup(PRInt32* aErrorCode,
SelectorList* aList)
{
for (;;) {
Selector* sel = new Selector();
if (!ParseSelector(aErrorCode, sel)) {
delete sel;
break;
}
aList->AddSelector(sel);
}
return (PRBool) (aList->mSelectors.Count() > 0);
}
static PRBool IsPseudoClass(const nsString& aBuffer)
{
return (aBuffer.EqualsIgnoreCase("link") ||
aBuffer.EqualsIgnoreCase("visited") ||
aBuffer.EqualsIgnoreCase("hover") ||
aBuffer.EqualsIgnoreCase("out-of-date") || // our extension
aBuffer.EqualsIgnoreCase("active"));
}
/**
* These are the 15 possible kinds of CSS1 style selectors:
* <UL>
* <LI>Tag
* <LI>Tag#Id
* <LI>Tag#Id.Class
* <LI>Tag#Id.Class:Pseudo
* <LI>Tag#Id:Pseudo
* <LI>Tag.Class
* <LI>Tag.Class:Pseudo
* <LI>Tag:Pseudo
* <LI>#Id
* <LI>#Id.Class
* <LI>#Id.Class:Pseudo
* <LI>#Id:Pseudo
* <LI>.Class
* <LI>.Class:Pseudo
* <LI>:Pseudo
* </UL>
*/
PRBool CSSParserImpl::ParseSelector(PRInt32* aErrorCode,
Selector* aSelectorResult)
{
PRUint32 mask = 0;
aSelectorResult->mTag.Truncate(0);
aSelectorResult->mClass.Truncate(0);
aSelectorResult->mID.Truncate(0);
aSelectorResult->mPseudoClass.Truncate(0);
aSelectorResult->mPseudoElement.Truncate(0);
nsCSSToken* tk = &mToken;
if (!GetToken(aErrorCode, PR_TRUE)) {
return PR_FALSE;
}
if (eCSSToken_Ident == tk->mType) {
// tag
mask |= SELECTOR_TAG;
aSelectorResult->mTag.Append(tk->mIdent);
if (!GetToken(aErrorCode, PR_FALSE)) {
// premature eof is ok (here!)
return PR_TRUE;
}
}
if (eCSSToken_ID == tk->mType) {
// #id
if ((1 < tk->mIdent.Length()) && (nsString::IsAlpha(tk->mIdent.CharAt(1)))) { // verify is legal ID
mask |= SELECTOR_ID;
aSelectorResult->mID.Append(tk->mIdent);
if (!GetToken(aErrorCode, PR_FALSE)) {
// premature eof is ok (here!)
return PR_TRUE;
}
}
else {
return PR_FALSE;
}
}
if ((eCSSToken_Symbol == tk->mType) && ('.' == tk->mSymbol)) {
// .class
if (!GetToken(aErrorCode, PR_FALSE)) {
return PR_FALSE;
}
if (eCSSToken_Ident != tk->mType) {
// malformed selector
UngetToken();
return PR_FALSE;
}
mask |= SELECTOR_CLASS;
aSelectorResult->mClass.Append(tk->mIdent);
if (!GetToken(aErrorCode, PR_FALSE)) {
// premature eof is ok (here!)
return PR_TRUE;
}
}
if ((eCSSToken_Symbol == tk->mType) && (':' == tk->mSymbol)) {
// :pseudo
if (!GetToken(aErrorCode, PR_FALSE)) {
// premature eof
return PR_FALSE;
}
if (eCSSToken_Ident != tk->mType) {
// malformed selector
UngetToken();
return PR_FALSE;
}
if (IsPseudoClass(tk->mIdent)) {
mask |= SELECTOR_PSEUDO_CLASS;
aSelectorResult->mPseudoClass.Append(tk->mIdent);
}
else {
mask |= SELECTOR_PSEUDO_ELEMENT;
aSelectorResult->mPseudoElement.Append(':'); // keep the colon
aSelectorResult->mPseudoElement.Append(tk->mIdent);
}
if (!GetToken(aErrorCode, PR_FALSE)) {
// premature eof is ok (here!)
return PR_TRUE;
}
}
if ((eCSSToken_Symbol == tk->mType) && (':' == tk->mSymbol)) {
// :pseudo
if (!GetToken(aErrorCode, PR_FALSE)) {
// premature eof
return PR_FALSE;
}
if (eCSSToken_Ident != tk->mType) {
// malformed selector
UngetToken();
return PR_FALSE;
}
if (! IsPseudoClass(tk->mIdent)) {
mask |= SELECTOR_PSEUDO_ELEMENT;
aSelectorResult->mPseudoElement.Truncate(0);
aSelectorResult->mPseudoElement.Append(':'); // keep the colon
aSelectorResult->mPseudoElement.Append(tk->mIdent);
}
tk = nsnull;
}
if (nsnull != tk) {
UngetToken();
}
if (mask == 0) {
return PR_FALSE;
}
aSelectorResult->mMask = mask;
return PR_TRUE;
}
nsICSSDeclaration*
CSSParserImpl::ParseDeclarationBlock(PRInt32* aErrorCode,
PRBool aCheckForBraces)
{
if (aCheckForBraces) {
if (!ExpectSymbol(aErrorCode, '{', PR_TRUE)) {
return nsnull;
}
}
nsICSSDeclaration* declaration = nsnull;
if (NS_OK == NS_NewCSSDeclaration(&declaration)) {
PRInt32 count = 0;
for (;;) {
if (ParseDeclaration(aErrorCode, declaration, aCheckForBraces)) {
count++; // count declarations
}
else {
if (!SkipDeclaration(aErrorCode, aCheckForBraces)) {
break;
}
if (aCheckForBraces) {
if (ExpectSymbol(aErrorCode, '}', PR_TRUE)) {
break;
}
}
// Since the skipped declaration didn't end the block we parse
// the next declaration.
}
}
if (0 == count) { // didn't get any XXX is this ok with the DOM?
NS_RELEASE(declaration);
}
}
return declaration;
}
PRBool CSSParserImpl::ParseColor(PRInt32* aErrorCode, nscolor* aColorResult)
{
char cbuf[50];
if (!GetToken(aErrorCode, PR_TRUE)) {
return PR_FALSE;
}
nsCSSToken* tk = &mToken;
switch (tk->mType) {
case eCSSToken_ID:
// #xxyyzz
tk->mIdent.ToCString(cbuf, sizeof(cbuf));
if (NS_HexToRGB(cbuf, aColorResult)) {
return PR_TRUE;
}
break;
case eCSSToken_Ident:
if (!tk->mIdent.EqualsIgnoreCase("rgb")) {
// named color (maybe!)
tk->mIdent.ToCString(cbuf, sizeof(cbuf));
if (NS_ColorNameToRGB(cbuf, aColorResult)) {
return PR_TRUE;
}
} else {
// rgb ( component , component , component )
PRUint8 r, g, b;
if (ExpectSymbol(aErrorCode, '(', PR_TRUE) &&
ParseColorComponent(aErrorCode, &r, ',') &&
ParseColorComponent(aErrorCode, &g, ',') &&
ParseColorComponent(aErrorCode, &b, ')')) {
*aColorResult = NS_RGB(r,g,b);
return PR_TRUE;
}
}
break;
default:
break;
}
// It's not a color
UngetToken();
return PR_FALSE;
}
PRBool CSSParserImpl::ParseColorComponent(PRInt32* aErrorCode,
PRUint8* aComponent,
char aStop)
{
if (!GetToken(aErrorCode, PR_TRUE)) {
return PR_FALSE;
}
float value;
nsCSSToken* tk = &mToken;
switch (tk->mType) {
case eCSSToken_Number:
value = tk->mNumber;
break;
case eCSSToken_Percentage:
value = tk->mNumber * 255.0f;
break;
default:
UngetToken();
return PR_FALSE;
}
if (ExpectSymbol(aErrorCode, aStop, PR_TRUE)) {
if (value < 0.0f) value = 0.0f;
if (value > 255.0f) value = 255.0f;
*aComponent = (PRUint8) value;
return PR_TRUE;
}
return PR_FALSE;
}
//----------------------------------------------------------------------
PRBool
CSSParserImpl::ParseDeclaration(PRInt32* aErrorCode,
nsICSSDeclaration* aDeclaration,
PRBool aCheckForBraces)
{
// Get property name
nsCSSToken* tk = &mToken;
for (;;) {
if (!GetToken(aErrorCode, PR_TRUE)) {
return PR_FALSE;
}
if (eCSSToken_Ident == tk->mType) {
if (!ExpectSymbol(aErrorCode, ':', PR_TRUE)) {
return PR_FALSE;
}
break;
}
if ((eCSSToken_Symbol == tk->mType) && (';' == tk->mSymbol)) {
// dangling semicolons are skipped
continue;
}
// Not a declaration...
UngetToken();
return PR_FALSE;
}
// Map property name to it's ID and then parse the property
char propertyName[100];
tk->mIdent.ToCString(propertyName, sizeof(propertyName));
if (!ParseProperty(aErrorCode, propertyName, aDeclaration)) {
return PR_FALSE;
}
// See if the declaration is followed by a "!important" declaration
PRBool isImportant = PR_FALSE;
if (!GetToken(aErrorCode, PR_TRUE)) {
if (aCheckForBraces) {
// Premature eof is not ok when proper termination is mandated
return PR_FALSE;
}
return PR_TRUE;
}
else {
if (eCSSToken_Symbol == tk->mType) {
if ('!' == tk->mSymbol) {
// Look for important ident
if (!GetToken(aErrorCode, PR_TRUE)) {
// Premature eof is not ok
return PR_FALSE;
}
if ((eCSSToken_Ident != tk->mType) ||
!tk->mIdent.EqualsIgnoreCase("important")) {
UngetToken();
return PR_FALSE;
}
isImportant = PR_TRUE;
}
else {
// Not a !important declaration
UngetToken();
}
}
else {
// Not a !important declaration
UngetToken();
}
}
if (PR_TRUE == isImportant) {
aDeclaration->SetValueImportant(propertyName);
}
// Make sure valid property declaration is terminated with either a
// semicolon or a right-curly-brace (when aCheckForBraces is true).
// When aCheckForBraces is false, proper termination is either
// semicolon or EOF.
if (!GetToken(aErrorCode, PR_TRUE)) {
if (aCheckForBraces) {
// Premature eof is not ok
return PR_FALSE;
}
return PR_TRUE;
}
if (eCSSToken_Symbol == tk->mType) {
if (';' == tk->mSymbol) {
return PR_TRUE;
}
if (!aCheckForBraces) {
// If we didn't hit eof and we didn't see a semicolon then the
// declaration is not properly terminated.
return PR_FALSE;
}
if ('}' == tk->mSymbol) {
UngetToken();
return PR_TRUE;
}
}
return PR_FALSE;
}
// Flags for ParseVariant method
#define VARIANT_KEYWORD 0x0001
#define VARIANT_LENGTH 0x0002
#define VARIANT_PERCENT 0x0004
#define VARIANT_COLOR 0x0008
#define VARIANT_URL 0x0010
#define VARIANT_NUMBER 0x0020
#define VARIANT_INTEGER 0x0040
#define VARIANT_AUTO 0x0100
#define VARIANT_INHERIT 0x0200
#define VARIANT_NONE 0x0400
#define VARIANT_NORMAL 0x0800
// Common combinations of variants
#define VARIANT_KL (VARIANT_KEYWORD | VARIANT_LENGTH)
#define VARIANT_KLP (VARIANT_KEYWORD | VARIANT_LENGTH | VARIANT_PERCENT)
#define VARIANT_KP (VARIANT_KEYWORD | VARIANT_PERCENT)
#define VARIANT_AH (VARIANT_AUTO | VARIANT_INHERIT)
#define VARIANT_AHLP (VARIANT_AH | VARIANT_LP)
#define VARIANT_AHI (VARIANT_AH | VARIANT_INTEGER)
#define VARIANT_AHK (VARIANT_AH | VARIANT_KEYWORD)
#define VARIANT_AHL (VARIANT_AH | VARIANT_LENGTH)
#define VARIANT_HK (VARIANT_INHERIT | VARIANT_KEYWORD)
#define VARIANT_HL (VARIANT_INHERIT | VARIANT_LENGTH)
#define VARIANT_HLP (VARIANT_HL | VARIANT_PERCENT)
#define VARIANT_HLPN (VARIANT_HLP | VARIANT_NUMBER)
#define VARIANT_HMK (VARIANT_INHERIT | VARIANT_NORMAL | VARIANT_KEYWORD)
#define VARIANT_AL (VARIANT_AUTO | VARIANT_LENGTH)
#define VARIANT_LP (VARIANT_LENGTH | VARIANT_PERCENT)
#define VARIANT_CK (VARIANT_COLOR | VARIANT_KEYWORD)
#define VARIANT_C VARIANT_COLOR
#define VARIANT_UK (VARIANT_URL | VARIANT_KEYWORD)
#define VARIANT_HPN (VARIANT_INHERIT | VARIANT_PERCENT | VARIANT_NUMBER)
// Keyword id tables for variant/enum parsing
static PRInt32 kBackgroundAttachmentKTable[] = {
KEYWORD_FIXED, NS_STYLE_BG_ATTACHMENT_FIXED,
KEYWORD_SCROLL, NS_STYLE_BG_ATTACHMENT_SCROLL,
-1
};
static PRInt32 kBackgroundColorKTable[] = {
KEYWORD_TRANSPARENT, NS_STYLE_BG_COLOR_TRANSPARENT,
-1
};
static PRInt32 kBackgroundRepeatKTable[] = {
KEYWORD_NO_REPEAT, NS_STYLE_BG_REPEAT_OFF,
KEYWORD_REPEAT, NS_STYLE_BG_REPEAT_XY,
KEYWORD_REPEAT_X, NS_STYLE_BG_REPEAT_X,
KEYWORD_REPEAT_Y, NS_STYLE_BG_REPEAT_Y,
-1
};
static PRInt32 kBorderStyleKTable[] = {
KEYWORD_NONE, NS_STYLE_BORDER_STYLE_NONE,
KEYWORD_DOTTED, NS_STYLE_BORDER_STYLE_DOTTED,
KEYWORD_DASHED, NS_STYLE_BORDER_STYLE_DASHED,
KEYWORD_SOLID, NS_STYLE_BORDER_STYLE_SOLID,
KEYWORD_DOUBLE, NS_STYLE_BORDER_STYLE_DOUBLE,
KEYWORD_GROOVE, NS_STYLE_BORDER_STYLE_GROOVE,
KEYWORD_RIDGE, NS_STYLE_BORDER_STYLE_RIDGE,
KEYWORD_INSET, NS_STYLE_BORDER_STYLE_INSET,
KEYWORD_OUTSET, NS_STYLE_BORDER_STYLE_OUTSET,
-1
};
static PRInt32 kBorderWidthKTable[] = {
KEYWORD_THIN, NS_STYLE_BORDER_WIDTH_THIN,
KEYWORD_MEDIUM, NS_STYLE_BORDER_WIDTH_MEDIUM,
KEYWORD_THICK, NS_STYLE_BORDER_WIDTH_THICK,
-1
};
static PRInt32 kClearKTable[] = {
KEYWORD_NONE, NS_STYLE_CLEAR_NONE,
KEYWORD_LEFT, NS_STYLE_CLEAR_LEFT,
KEYWORD_RIGHT, NS_STYLE_CLEAR_RIGHT,
KEYWORD_BOTH, NS_STYLE_CLEAR_LEFT_AND_RIGHT,
-1
};
static PRInt32 kCursorKTable[] = {
KEYWORD_IBEAM, NS_STYLE_CURSOR_IBEAM,
KEYWORD_ARROW, NS_STYLE_CURSOR_DEFAULT,
KEYWORD_HAND, NS_STYLE_CURSOR_HAND,
-1
};
static PRInt32 kDirectionKTable[] = {
KEYWORD_LTR, NS_STYLE_DIRECTION_LTR,
KEYWORD_RTL, NS_STYLE_DIRECTION_RTL,
KEYWORD_INHERIT, NS_STYLE_DIRECTION_INHERIT,
-1
};
static PRInt32 kDisplayKTable[] = {
KEYWORD_NONE, NS_STYLE_DISPLAY_NONE,
KEYWORD_BLOCK, NS_STYLE_DISPLAY_BLOCK,
KEYWORD_INLINE, NS_STYLE_DISPLAY_INLINE,
KEYWORD_LIST_ITEM, NS_STYLE_DISPLAY_LIST_ITEM,
KEYWORD_MARKER, NS_STYLE_DISPLAY_MARKER,
KEYWORD_RUN_IN, NS_STYLE_DISPLAY_RUN_IN,
KEYWORD_COMPACT, NS_STYLE_DISPLAY_COMPACT,
KEYWORD_TABLE, NS_STYLE_DISPLAY_TABLE,
KEYWORD_INLINE_TABLE, NS_STYLE_DISPLAY_INLINE_TABLE,
KEYWORD_TABLE_ROW_GROUP, NS_STYLE_DISPLAY_TABLE_ROW_GROUP,
KEYWORD_TABLE_COLUMN, NS_STYLE_DISPLAY_TABLE_COLUMN,
KEYWORD_TABLE_COLUMN_GROUP, NS_STYLE_DISPLAY_TABLE_COLUMN_GROUP,
KEYWORD_TABLE_HEADER_GROUP, NS_STYLE_DISPLAY_TABLE_HEADER_GROUP,
KEYWORD_TABLE_FOOTER_GROUP, NS_STYLE_DISPLAY_TABLE_FOOTER_GROUP,
KEYWORD_TABLE_ROW, NS_STYLE_DISPLAY_TABLE_ROW,
KEYWORD_TABLE_CELL, NS_STYLE_DISPLAY_TABLE_CELL,
KEYWORD_TABLE_CAPTION, NS_STYLE_DISPLAY_TABLE_CAPTION,
-1
};
static PRInt32 kFloatKTable[] = {
KEYWORD_NONE, NS_STYLE_FLOAT_NONE,
KEYWORD_LEFT, NS_STYLE_FLOAT_LEFT,
KEYWORD_RIGHT, NS_STYLE_FLOAT_RIGHT,
-1
};
static PRInt32 kFontSizeKTable[] = {
KEYWORD_XX_SMALL, NS_STYLE_FONT_SIZE_XXSMALL,
KEYWORD_X_SMALL, NS_STYLE_FONT_SIZE_XSMALL,
KEYWORD_SMALL, NS_STYLE_FONT_SIZE_SMALL,
KEYWORD_MEDIUM, NS_STYLE_FONT_SIZE_MEDIUM,
KEYWORD_LARGE, NS_STYLE_FONT_SIZE_LARGE,
KEYWORD_X_LARGE, NS_STYLE_FONT_SIZE_XLARGE,
KEYWORD_XX_LARGE, NS_STYLE_FONT_SIZE_XXLARGE,
KEYWORD_LARGER, NS_STYLE_FONT_SIZE_LARGER,
KEYWORD_SMALLER, NS_STYLE_FONT_SIZE_SMALLER,
-1
};
static PRInt32 kFontStyleKTable[] = {
KEYWORD_NORMAL, NS_STYLE_FONT_STYLE_NORMAL,
KEYWORD_ITALIC, NS_STYLE_FONT_STYLE_ITALIC,
KEYWORD_OBLIQUE, NS_STYLE_FONT_STYLE_OBLIQUE,
-1
};
static PRInt32 kFontVariantKTable[] = {
KEYWORD_NORMAL, NS_STYLE_FONT_VARIANT_NORMAL,
KEYWORD_SMALL_CAPS, NS_STYLE_FONT_VARIANT_SMALL_CAPS,
-1
};
static PRInt32 kListStyleImageKTable[] = {
KEYWORD_NONE, NS_STYLE_LIST_STYLE_IMAGE_NONE,
-1
};
static PRInt32 kListStylePositionKTable[] = {
KEYWORD_INSIDE, NS_STYLE_LIST_STYLE_POSITION_INSIDE,
KEYWORD_OUTSIDE, NS_STYLE_LIST_STYLE_POSITION_OUTSIDE,
-1
};
static PRInt32 kListStyleKTable[] = {
KEYWORD_NONE, NS_STYLE_LIST_STYLE_NONE,
KEYWORD_DISC, NS_STYLE_LIST_STYLE_DISC,
KEYWORD_CIRCLE, NS_STYLE_LIST_STYLE_CIRCLE,
KEYWORD_SQUARE, NS_STYLE_LIST_STYLE_SQUARE,
KEYWORD_DECIMAL, NS_STYLE_LIST_STYLE_DECIMAL,
KEYWORD_LOWER_ROMAN, NS_STYLE_LIST_STYLE_LOWER_ROMAN,
KEYWORD_UPPER_ROMAN, NS_STYLE_LIST_STYLE_UPPER_ROMAN,
KEYWORD_LOWER_ALPHA, NS_STYLE_LIST_STYLE_LOWER_ALPHA,
KEYWORD_UPPER_ALPHA, NS_STYLE_LIST_STYLE_UPPER_ALPHA,
-1
};
static PRInt32 kMarginSizeKTable[] = {
KEYWORD_AUTO, NS_STYLE_MARGIN_SIZE_AUTO,
-1
};
static PRInt32 kOverflowKTable[] = {
KEYWORD_VISIBLE, NS_STYLE_OVERFLOW_VISIBLE,
KEYWORD_HIDDEN, NS_STYLE_OVERFLOW_HIDDEN,
KEYWORD_SCROLL, NS_STYLE_OVERFLOW_SCROLL,
KEYWORD_AUTO, NS_STYLE_OVERFLOW_AUTO,
-1
};
static PRInt32 kPositionKTable[] = {
KEYWORD_RELATIVE, NS_STYLE_POSITION_RELATIVE,
KEYWORD_ABSOLUTE, NS_STYLE_POSITION_ABSOLUTE,
KEYWORD_FIXED, NS_STYLE_POSITION_FIXED,
-1
};
static PRInt32 kTextAlignKTable[] = {
KEYWORD_LEFT, NS_STYLE_TEXT_ALIGN_LEFT,
KEYWORD_RIGHT, NS_STYLE_TEXT_ALIGN_RIGHT,
KEYWORD_CENTER, NS_STYLE_TEXT_ALIGN_CENTER,
KEYWORD_JUSTIFY, NS_STYLE_TEXT_ALIGN_JUSTIFY,
-1
};
static PRInt32 kTextTransformKTable[] = {
KEYWORD_NONE, NS_STYLE_TEXT_TRANSFORM_NONE,
KEYWORD_CAPITALIZE, NS_STYLE_TEXT_TRANSFORM_CAPITALIZE,
KEYWORD_LOWERCASE, NS_STYLE_TEXT_TRANSFORM_LOWERCASE,
KEYWORD_UPPERCASE, NS_STYLE_TEXT_TRANSFORM_UPPERCASE,
-1
};
static PRInt32 kVerticalAlignKTable[] = {
KEYWORD_BASELINE, NS_STYLE_VERTICAL_ALIGN_BASELINE,
KEYWORD_SUB, NS_STYLE_VERTICAL_ALIGN_SUB,
KEYWORD_SUPER, NS_STYLE_VERTICAL_ALIGN_SUPER,
KEYWORD_TOP, NS_STYLE_VERTICAL_ALIGN_TOP,
KEYWORD_TEXT_TOP, NS_STYLE_VERTICAL_ALIGN_TEXT_TOP,
KEYWORD_MIDDLE, NS_STYLE_VERTICAL_ALIGN_MIDDLE,
KEYWORD_BOTTOM, NS_STYLE_VERTICAL_ALIGN_BOTTOM,
KEYWORD_TEXT_BOTTOM, NS_STYLE_VERTICAL_ALIGN_TEXT_BOTTOM,
-1
};
static PRInt32 kVisibilityKTable[] = {
KEYWORD_VISIBLE, NS_STYLE_VISIBILITY_VISIBLE,
KEYWORD_HIDDEN, NS_STYLE_VISIBILITY_HIDDEN,
-1
};
static PRInt32 kWhitespaceKTable[] = {
KEYWORD_NORMAL, NS_STYLE_WHITESPACE_NORMAL,
KEYWORD_PRE, NS_STYLE_WHITESPACE_PRE,
KEYWORD_NOWRAP, NS_STYLE_WHITESPACE_NOWRAP,
-1
};
static const char* kBorderTopNames[] = {
"border-top-width",
"border-top-style",
"border-top-color",
};
static const char* kBorderRightNames[] = {
"border-right-width",
"border-right-style",
"border-right-color",
};
static const char* kBorderBottomNames[] = {
"border-bottom-width",
"border-bottom-style",
"border-bottom-color",
};
static const char* kBorderLeftNames[] = {
"border-left-width",
"border-left-style",
"border-left-color",
};
PRInt32 CSSParserImpl::SearchKeywordTable(PRInt32 aID, PRInt32 aTable[])
{
PRInt32 i = 0;
for (;;) {
if (aTable[i] < 0) {
break;
}
if (aID == aTable[i]) {
return i;
}
i += 2;
}
return -1;
}
PRBool CSSParserImpl::ParseEnum(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration,
const char* aName, PRInt32* aTable)
{
nsString* ident = NextIdent(aErrorCode);
if (nsnull == ident) {
return PR_FALSE;
}
char cbuf[50];
ident->ToCString(cbuf, sizeof(cbuf));
PRInt32 id = nsCSSKeywords::LookupName(cbuf);
if (id >= 0) {
PRInt32 ix = SearchKeywordTable(id, aTable);
if (ix >= 0) {
aDeclaration->AppendValue(aName, nsCSSValue(aTable[ix+1], eCSSUnit_Enumerated));
return PR_TRUE;
}
}
// Put the unknown identifier back and return
UngetToken();
return PR_FALSE;
}
PRBool CSSParserImpl::TranslateLength(nsICSSDeclaration* aDeclaration,
const char* aName,
float aNumber,
const nsString& aDimension)
{
nsCSSUnit units;
if (0 != aDimension.Length()) {
char cbuf[50];
aDimension.ToCString(cbuf, sizeof(cbuf));
PRInt32 id = nsCSSKeywords::LookupName(cbuf);
switch (id) {
case KEYWORD_EM: units = eCSSUnit_EM; break;
case KEYWORD_EX: units = eCSSUnit_XHeight; break;
case KEYWORD_PX: units = eCSSUnit_Pixel; break;
case KEYWORD_IN: units = eCSSUnit_Inch; break;
case KEYWORD_CM: units = eCSSUnit_Centimeter; break;
case KEYWORD_MM: units = eCSSUnit_Millimeter; break;
case KEYWORD_PT: units = eCSSUnit_Point; break;
case KEYWORD_PC: units = eCSSUnit_Pica; break;
default:
// unknown dimension
return PR_FALSE;
}
} else {
// Must be a zero number...
units = eCSSUnit_Point;
}
aDeclaration->AppendValue(aName, nsCSSValue(aNumber, units));
return PR_TRUE;
}
PRBool CSSParserImpl::ParseVariant(PRInt32* aErrorCode,
nsICSSDeclaration* aDeclaration,
const char* aName,
PRInt32 aVariants, PRInt32* aTable)
{
nsCSSToken* tk = &mToken;
if (!GetToken(aErrorCode, PR_TRUE)) {
return PR_FALSE;
}
if (((aVariants & (VARIANT_AHK | VARIANT_NORMAL | VARIANT_NONE)) != 0) &&
(eCSSToken_Ident == tk->mType)) {
char cbuf[50];
tk->mIdent.ToCString(cbuf, sizeof(cbuf));
PRInt32 sid = nsCSSKeywords::LookupName(cbuf);
if (sid >= 0) { // known keyword
if ((aVariants & VARIANT_AUTO) != 0) {
if (sid == KEYWORD_AUTO) {
aDeclaration->AppendValue(aName, nsCSSValue(eCSSUnit_Auto));
return PR_TRUE;
}
}
if ((aVariants & VARIANT_INHERIT) != 0) {
if (sid == KEYWORD_INHERIT) {
aDeclaration->AppendValue(aName, nsCSSValue(eCSSUnit_Inherit));
return PR_TRUE;
}
}
if ((aVariants & VARIANT_NONE) != 0) {
if (sid == KEYWORD_NONE) {
aDeclaration->AppendValue(aName, nsCSSValue(eCSSUnit_None));
return PR_TRUE;
}
}
if ((aVariants & VARIANT_NORMAL) != 0) {
if (sid == KEYWORD_NORMAL) {
aDeclaration->AppendValue(aName, nsCSSValue(eCSSUnit_Normal));
return PR_TRUE;
}
}
if ((aVariants & VARIANT_KEYWORD) != 0) {
PRInt32 ix = SearchKeywordTable(sid, aTable);
if (ix >= 0) {
aDeclaration->AppendValue(aName, nsCSSValue(aTable[ix+1], eCSSUnit_Enumerated));
return PR_TRUE;
}
}
}
}
if (((aVariants & VARIANT_LENGTH) != 0) && tk->isDimension()) {
return TranslateLength(aDeclaration, aName, tk->mNumber, tk->mIdent);
}
if (((aVariants & VARIANT_PERCENT) != 0) &&
(eCSSToken_Percentage == tk->mType)) {
aDeclaration->AppendValue(aName, nsCSSValue(tk->mNumber, eCSSUnit_Percent));
return PR_TRUE;
}
if (((aVariants & VARIANT_NUMBER) != 0) &&
(eCSSToken_Number == tk->mType)) {
aDeclaration->AppendValue(aName, nsCSSValue(tk->mNumber, eCSSUnit_Number));
return PR_TRUE;
}
if (((aVariants & VARIANT_INTEGER) != 0) &&
(eCSSToken_Number == tk->mType) && tk->mIntegerValid) {
aDeclaration->AppendValue(aName, nsCSSValue(tk->mInteger, eCSSUnit_Integer));
return PR_TRUE;
}
if (((aVariants & VARIANT_URL) != 0) &&
(eCSSToken_URL == tk->mType)) {
// Translate url into an absolute url if the url is relative to
// the style sheet.
// XXX editors won't like this - too bad for now
nsAutoString absURL;
nsString baseURL;
nsresult rv = NS_MakeAbsoluteURL(mURL, baseURL, tk->mIdent, absURL);
if (NS_OK == rv) {
aDeclaration->AppendValue(aName, nsCSSValue(absURL));
}
else {
aDeclaration->AppendValue(aName, nsCSSValue(tk->mIdent));
}
return PR_TRUE;
}
if ((aVariants & VARIANT_COLOR) != 0) {
if ((eCSSToken_ID == tk->mType) || (eCSSToken_Ident == tk->mType)) {
// Put token back so that parse color can get it
UngetToken();
nscolor rgba;
// XXX This loses the original input format (e.g. a name which
// should be preserved when editing)
if (ParseColor(aErrorCode, &rgba)) {
aDeclaration->AppendValue(aName, nsCSSValue(rgba));
return PR_TRUE;
}
return PR_FALSE;
}
}
UngetToken();
return PR_FALSE;
}
PRInt32 CSSParserImpl::ParseChoice(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration,
const char* aNames[], PRInt32 aNumNames)
{
PRInt32 found = 0;
for (int i = 0; i < aNumNames; i++) {
// Try each property parser in order
for (int j = 0; j < aNumNames; j++) {
PRInt32 bit = 1 << j;
if ((found & bit) == 0) {
PRInt32 id = nsCSSProps::LookupName(aNames[j]);
if (ParseProperty(aErrorCode, aNames[j], aDeclaration, id)) {
found |= bit;
}
}
}
}
return found;
}
/**
* Parse a "box" property. Box properties have 1 to 4 values. When less
* than 4 values are provided a standard mapping is used to replicate
* existing values. Note that the replication requires renaming the
* values.
*/
PRBool CSSParserImpl::ParseBoxProperties(PRInt32* aErrorCode,
nsICSSDeclaration* aDeclaration,
const char* aNames[])
{
// Get up to four values for the property
PRInt32 count = 0;
for (int i = 0; i < 4; i++) {
PRInt32 id = nsCSSProps::LookupName(aNames[i]);
if (!ParseProperty(aErrorCode, aNames[i], aDeclaration, id)) {
break;
}
count++;
}
if (count == 0) {
return PR_FALSE;
}
// Provide missing values by replicating some of the values found
nsCSSValue value;
switch (count) {
case 1: // Make right == top
aDeclaration->GetValue(aNames[0], value);
aDeclaration->AppendValue(aNames[1], value);
case 2: // Make bottom == top
aDeclaration->GetValue(aNames[0], value);
aDeclaration->AppendValue(aNames[2], value);
case 3: // Make left == right
aDeclaration->GetValue(aNames[1], value);
aDeclaration->AppendValue(aNames[3], value);
}
return PR_TRUE;
}
PRBool CSSParserImpl::ParseProperty(PRInt32* aErrorCode,
const char* aName,
nsICSSDeclaration* aDeclaration)
{
PRInt32 id = nsCSSProps::LookupName(aName);
if (id < 0) {
return PR_FALSE;
}
// Strip out properties we use internally. These properties are used
// by compound property parsing routines (e.g. "background-position").
switch (id) {
case PROP_BACKGROUND_X_POSITION:
case PROP_BACKGROUND_Y_POSITION:
case PROP_BORDER_TOP_COLOR:
case PROP_BORDER_RIGHT_COLOR:
case PROP_BORDER_BOTTOM_COLOR:
case PROP_BORDER_LEFT_COLOR:
case PROP_BORDER_TOP_STYLE:
case PROP_BORDER_RIGHT_STYLE:
case PROP_BORDER_BOTTOM_STYLE:
case PROP_BORDER_LEFT_STYLE:
case PROP_CLIP_BOTTOM:
case PROP_CLIP_LEFT:
case PROP_CLIP_RIGHT:
case PROP_CLIP_TOP:
// The user can't use these
return PR_FALSE;
}
return ParseProperty(aErrorCode, aName, aDeclaration, id);
}
PRBool CSSParserImpl::ParseProperty(PRInt32* aErrorCode,
const char* aName,
nsICSSDeclaration* aDeclaration,
PRInt32 aID)
{
switch (aID) {
case PROP_BACKGROUND:
return ParseBackground(aErrorCode, aDeclaration);
case PROP_BACKGROUND_ATTACHMENT:
return ParseEnum(aErrorCode, aDeclaration, aName, kBackgroundAttachmentKTable);
case PROP_BACKGROUND_COLOR:
return ParseVariant(aErrorCode, aDeclaration, aName, VARIANT_CK,
kBackgroundColorKTable);
case PROP_BACKGROUND_FILTER:
return ParseBackgroundFilter(aErrorCode, aDeclaration, aName);
case PROP_BACKGROUND_IMAGE:
return ParseVariant(aErrorCode, aDeclaration, aName, VARIANT_URL | VARIANT_NONE,
nsnull);
case PROP_BACKGROUND_POSITION:
return ParseBackgroundPosition(aErrorCode, aDeclaration, aName);
case PROP_BACKGROUND_REPEAT:
return ParseEnum(aErrorCode, aDeclaration, aName, kBackgroundRepeatKTable);
case PROP_BORDER:
return ParseBorder(aErrorCode, aDeclaration);
case PROP_BORDER_COLOR:
return ParseBorderColor(aErrorCode, aDeclaration);
case PROP_BORDER_STYLE:
return ParseBorderStyle(aErrorCode, aDeclaration);
case PROP_BORDER_BOTTOM:
return ParseBorderSide(aErrorCode, aDeclaration, kBorderBottomNames, 0);
case PROP_BORDER_LEFT:
return ParseBorderSide(aErrorCode, aDeclaration, kBorderLeftNames, 1);
case PROP_BORDER_RIGHT:
return ParseBorderSide(aErrorCode, aDeclaration, kBorderRightNames, 2);
case PROP_BORDER_TOP:
return ParseBorderSide(aErrorCode, aDeclaration, kBorderTopNames, 3);
case PROP_BORDER_BOTTOM_COLOR:
case PROP_BORDER_LEFT_COLOR:
case PROP_BORDER_RIGHT_COLOR:
case PROP_BORDER_TOP_COLOR:
return ParseVariant(aErrorCode, aDeclaration, aName, VARIANT_C, nsnull);
case PROP_BORDER_BOTTOM_STYLE:
case PROP_BORDER_LEFT_STYLE:
case PROP_BORDER_RIGHT_STYLE:
case PROP_BORDER_TOP_STYLE:
return ParseEnum(aErrorCode, aDeclaration, aName, kBorderStyleKTable);
case PROP_BORDER_BOTTOM_WIDTH:
case PROP_BORDER_LEFT_WIDTH:
case PROP_BORDER_RIGHT_WIDTH:
case PROP_BORDER_TOP_WIDTH:
return ParseVariant(aErrorCode, aDeclaration, aName, VARIANT_KL,
kBorderWidthKTable);
case PROP_BORDER_WIDTH:
return ParseBorderWidth(aErrorCode, aDeclaration);
case PROP_CLEAR:
return ParseEnum(aErrorCode, aDeclaration, aName, kClearKTable);
case PROP_CLIP:
return ParseClip(aErrorCode, aDeclaration);
case PROP_COLOR:
return ParseVariant(aErrorCode, aDeclaration, aName, VARIANT_COLOR, nsnull);
case PROP_CURSOR:
return ParseVariant(aErrorCode, aDeclaration, aName, VARIANT_AHK, kCursorKTable);
case PROP_DIRECTION:
return ParseEnum(aErrorCode, aDeclaration, aName, kDirectionKTable);
case PROP_DISPLAY:
return ParseEnum(aErrorCode, aDeclaration, aName, kDisplayKTable);
case PROP_FILTER:
return ParseForegroundFilter(aErrorCode, aDeclaration, aName);
case PROP_FLOAT:
return ParseEnum(aErrorCode, aDeclaration, aName, kFloatKTable);
case PROP_FONT:
return ParseFont(aErrorCode, aDeclaration, aName);
case PROP_FONT_FAMILY:
return ParseFontFamily(aErrorCode, aDeclaration, aName);
case PROP_FONT_SIZE:
return ParseVariant(aErrorCode, aDeclaration, aName, VARIANT_KLP,
kFontSizeKTable);
case PROP_FONT_STYLE:
return ParseEnum(aErrorCode, aDeclaration, aName, kFontStyleKTable);
case PROP_FONT_VARIANT:
return ParseEnum(aErrorCode, aDeclaration, aName, kFontVariantKTable);
case PROP_FONT_WEIGHT:
return ParseFontWeight(aErrorCode, aDeclaration, aName);
case PROP_HEIGHT:
return ParseVariant(aErrorCode, aDeclaration, aName, VARIANT_AHLP, nsnull);
case PROP_LEFT:
return ParseVariant(aErrorCode, aDeclaration, aName, VARIANT_AHLP, nsnull);
case PROP_LINE_HEIGHT:
return ParseVariant(aErrorCode, aDeclaration, aName, VARIANT_HLPN | VARIANT_NORMAL,
nsnull);
case PROP_LIST_STYLE:
return ParseListStyle(aErrorCode, aDeclaration);
case PROP_LIST_STYLE_IMAGE:
return ParseVariant(aErrorCode, aDeclaration, aName, VARIANT_UK,
kListStyleImageKTable);
case PROP_LIST_STYLE_POSITION:
return ParseEnum(aErrorCode, aDeclaration, aName, kListStylePositionKTable);
case PROP_LIST_STYLE_TYPE:
return ParseEnum(aErrorCode, aDeclaration, aName, kListStyleKTable);
case PROP_MARGIN:
return ParseMargin(aErrorCode, aDeclaration);
case PROP_MARGIN_BOTTOM:
case PROP_MARGIN_LEFT:
case PROP_MARGIN_RIGHT:
case PROP_MARGIN_TOP:
return ParseVariant(aErrorCode, aDeclaration, aName, VARIANT_KLP,
kMarginSizeKTable);
case PROP_PADDING:
return ParsePadding(aErrorCode, aDeclaration);
case PROP_PADDING_BOTTOM:
case PROP_PADDING_LEFT:
case PROP_PADDING_RIGHT:
case PROP_PADDING_TOP:
return ParseVariant(aErrorCode, aDeclaration, aName, VARIANT_LP, nsnull);
case PROP_OPACITY:
return ParseVariant(aErrorCode, aDeclaration, aName, VARIANT_HPN, nsnull);
case PROP_OVERFLOW:
return ParseEnum(aErrorCode, aDeclaration, aName, kOverflowKTable);
case PROP_POSITION:
return ParseVariant(aErrorCode, aDeclaration, aName, VARIANT_HMK, kPositionKTable);
case PROP_TEXT_ALIGN:
return ParseEnum(aErrorCode, aDeclaration, aName, kTextAlignKTable);
case PROP_TEXT_DECORATION:
return ParseTextDecoration(aErrorCode, aDeclaration, aName);
case PROP_TEXT_INDENT:
return ParseVariant(aErrorCode, aDeclaration, aName, VARIANT_LP, nsnull);
case PROP_TEXT_TRANSFORM:
return ParseEnum(aErrorCode, aDeclaration, aName, kTextTransformKTable);
case PROP_TOP:
return ParseVariant(aErrorCode, aDeclaration, aName, VARIANT_AHLP, nsnull);
case PROP_VERTICAL_ALIGN:
return ParseVariant(aErrorCode, aDeclaration, aName, VARIANT_KP,
kVerticalAlignKTable);
case PROP_VISIBILITY:
return ParseVariant(aErrorCode, aDeclaration, aName, VARIANT_HK, kVisibilityKTable);
case PROP_WHITE_SPACE:
return ParseEnum(aErrorCode, aDeclaration, aName, kWhitespaceKTable);
case PROP_WIDTH:
return ParseVariant(aErrorCode, aDeclaration, aName, VARIANT_AHLP, nsnull);
case PROP_LETTER_SPACING:
case PROP_WORD_SPACING:
return ParseVariant(aErrorCode, aDeclaration, aName, VARIANT_HL | VARIANT_NORMAL, nsnull);
case PROP_Z_INDEX:
return ParseVariant(aErrorCode, aDeclaration, aName, VARIANT_AHI, nsnull);
}
return PR_FALSE;
}
PRBool CSSParserImpl::ParseBackground(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration)
{
static const char* kBackgroundNames[] = {
"background-color",
"background-image",
"background-repeat",
"background-attachment",
"background-position",
"background-filter",
};
PRInt32 found = ParseChoice(aErrorCode, aDeclaration, kBackgroundNames, 6);
if (0 == found) {
return PR_FALSE;
}
// Provide missing values
if ((found & 1) == 0) {
aDeclaration->AppendValue(kBackgroundNames[0],
nsCSSValue(NS_STYLE_BG_COLOR_TRANSPARENT,
eCSSUnit_Enumerated));
}
if ((found & 2) == 0) {
aDeclaration->AppendValue(kBackgroundNames[1],
nsCSSValue(NS_STYLE_BG_IMAGE_NONE,
eCSSUnit_Enumerated));
}
if ((found & 4) == 0) {
aDeclaration->AppendValue(kBackgroundNames[2],
nsCSSValue(NS_STYLE_BG_REPEAT_XY,
eCSSUnit_Enumerated));
}
if ((found & 8) == 0) {
aDeclaration->AppendValue(kBackgroundNames[3],
nsCSSValue(NS_STYLE_BG_ATTACHMENT_SCROLL,
eCSSUnit_Enumerated));
}
if ((found & 16) == 0) {
aDeclaration->AppendValue("background-x-position", nsCSSValue(0.0f, eCSSUnit_Percent));
aDeclaration->AppendValue("background-y-position", nsCSSValue(0.0f, eCSSUnit_Percent));
}
// XXX Note: no default for filter (yet)
return PR_TRUE;
}
// Bits used in determining which background position info we have
#define BG_CENTER 0
#define BG_TOP 1
#define BG_BOTTOM 2
#define BG_LEFT 4
#define BG_RIGHT 8
#define BG_CENTER1 16
#define BG_CENTER2 32
PRBool CSSParserImpl::ParseBackgroundPosition(PRInt32* aErrorCode,
nsICSSDeclaration* aDeclaration,
const char* aName)
{
static PRInt32 kBackgroundPositionNames[] = {
PROP_BACKGROUND_X_POSITION,
PROP_BACKGROUND_Y_POSITION,
};
// Note: Don't change this table unless you update
// parseBackgroundPosition!
static PRInt32 kBackgroundXYPositionKTable[] = {
KEYWORD_CENTER, BG_CENTER,
KEYWORD_TOP, BG_TOP,
KEYWORD_BOTTOM, BG_BOTTOM,
KEYWORD_LEFT, BG_LEFT,
KEYWORD_RIGHT, BG_RIGHT,
-1,
};
const char* bxp = "background-x-position";
const char* byp = "background-y-position";
// First try a number or a length value
if (ParseVariant(aErrorCode, aDeclaration, bxp, VARIANT_LP, nsnull)) {
// We have one number/length. Get the optional second number/length.
if (ParseVariant(aErrorCode, aDeclaration, byp, VARIANT_LP, nsnull)) {
// We have two numbers
return PR_TRUE;
}
// We have one number which is the x position. Create an value for
// the vertical position which is of value 50%
aDeclaration->AppendValue(byp, nsCSSValue(0.5f, eCSSUnit_Percent));
// XXX shouldn't this be CENTER enum instead?
return PR_TRUE;
}
// Now try keywords. We do this manually to allow for the first
// appearance of "center" to apply to the either the x or y
// position (it's ambiguous so we have to disambiguate). Each
// allowed keyword value is assigned it's own bit. We don't allow
// any duplicate keywords other than center. We try to get two
// keywords but it's okay if there is only one.
PRInt32 mask = 0;
PRInt32 centerBit = BG_CENTER1;
for (PRInt32 i = 0; i < 2; i++) {
nsString* ident = NextIdent(aErrorCode);
if (nsnull == ident) {
break;
}
char cbuf[50];
ident->ToCString(cbuf, sizeof(cbuf));
PRInt32 ix = SearchKeywordTable(nsCSSKeywords::LookupName(cbuf),
kBackgroundXYPositionKTable);
if (ix >= 0) {
PRInt32 bit = kBackgroundXYPositionKTable[ix + 1];
if (bit == 0) {
// Special hack for center bits: We can have two of them
mask |= centerBit;
centerBit <<= 1;
continue;
} else if ((mask & bit) != 0) {
// no duplicate values allowed (other than center)
return PR_FALSE;
}
mask |= bit;
} else {
UngetToken();
break;
}
}
// Check for bad input. Bad input consists of no matching keywords,
// or pairs of x keywords or pairs of y keywords.
if ((mask == 0) || (mask == (BG_TOP | BG_BOTTOM)) ||
(mask == (BG_LEFT | BG_RIGHT))) {
return PR_FALSE;
}
// Map good input
int xValue = 50;
if ((mask & (BG_LEFT | BG_RIGHT)) != 0) {
// We have an x value
xValue = ((mask & BG_LEFT) != 0) ? 0 : 100;
}
int yValue = 50;
if ((mask & (BG_TOP | BG_BOTTOM)) != 0) {
// We have a y value
yValue = ((mask & BG_TOP) != 0) ? 0 : 100;
}
// Create style values
aDeclaration->AppendValue(bxp, nsCSSValue(xValue, eCSSUnit_Enumerated));
aDeclaration->AppendValue(byp, nsCSSValue(yValue, eCSSUnit_Enumerated));
return PR_TRUE;
}
PRBool CSSParserImpl::ParseBackgroundFilter(PRInt32* aErrorCode,
nsICSSDeclaration* aDeclaration,
const char* aName)
{
// XXX not yet supported
return PR_FALSE;
}
PRBool CSSParserImpl::ParseForegroundFilter(PRInt32* aErrorCode,
nsICSSDeclaration* aDeclaration,
const char* aName)
{
// XXX not yet supported
return PR_FALSE;
}
// These must be in alphabetical order for aWhich based indexing to work
static const char* kBorderStyleNames[] = {
"border-bottom-style",
"border-left-style",
"border-right-style",
"border-top-style",
};
static const char* kBorderWidthNames[] = {
"border-bottom-width",
"border-left-width",
"border-right-width",
"border-top-width",
};
PRBool CSSParserImpl::ParseBorder(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration)
{
static const char* kBorderNames[] = {
"border-width",
"border-style",
"border-color"
};
PRInt32 found = ParseChoice(aErrorCode, aDeclaration, kBorderNames, 3);
if (0 == found) {
return PR_FALSE;
}
if (0 == (found & 1)) {
// provide missing border width's
for (int i = 0; i < 4; i++) {
aDeclaration->AppendValue(kBorderWidthNames[i],
nsCSSValue(NS_STYLE_BORDER_WIDTH_MEDIUM,
eCSSUnit_Enumerated));
}
}
if (0 == (found & 2)) {
// provide missing border style's
for (int i = 0; i < 4; i++) {
aDeclaration->AppendValue(kBorderStyleNames[i],
nsCSSValue(NS_STYLE_BORDER_STYLE_NONE,
eCSSUnit_Enumerated));
}
}
// Do NOT provide a missing color value as the default is to be
// the color of the element itself which must be determined later.
return PR_TRUE;
}
PRBool CSSParserImpl::ParseBorderColor(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration)
{
static const char* kBoxBorderColorNames[] = {
"border-top-color",
"border-right-color",
"border-bottom-color",
"border-left-color",
};
return ParseBoxProperties(aErrorCode, aDeclaration, kBoxBorderColorNames);
}
PRBool CSSParserImpl::ParseBorderSide(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration,
const char* aNames[], PRInt32 aWhich)
{
PRInt32 found = ParseChoice(aErrorCode, aDeclaration, aNames, 3);
if (found == 0) return PR_FALSE;
if ((found & 1) == 0) {
// Provide default border-width
aDeclaration->AppendValue(kBorderWidthNames[aWhich],
nsCSSValue(NS_STYLE_BORDER_WIDTH_MEDIUM, eCSSUnit_Enumerated));
}
if ((found & 2) == 0) {
// Provide default border-style
aDeclaration->AppendValue(kBorderStyleNames[aWhich],
nsCSSValue(NS_STYLE_BORDER_STYLE_NONE, eCSSUnit_Enumerated));
}
// Do NOT provide a missing color value as the default is to be
// the color of the element itself which must be determined later.
return PR_TRUE;
}
PRBool CSSParserImpl::ParseBorderStyle(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration)
{
// in top, right, bottom, left order
static const char* kBoxBorderStyleNames[] = {
"border-top-style",
"border-right-style",
"border-bottom-style",
"border-left-style",
};
return ParseBoxProperties(aErrorCode, aDeclaration, kBoxBorderStyleNames);
}
PRBool CSSParserImpl::ParseBorderWidth(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration)
{
static const char* kBoxBorderWidthNames[] = {
"border-top-width",
"border-right-width",
"border-bottom-width",
"border-left-width",
};
return ParseBoxProperties(aErrorCode, aDeclaration, kBoxBorderWidthNames);
}
PRBool CSSParserImpl::ParseClip(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration)
{
static const char* kClipNames[] = {
"clip-top",
"clip-right",
"clip-bottom",
"clip-left",
};
nsString* ident = NextIdent(aErrorCode);
if (nsnull == ident) {
return PR_FALSE;
}
if (ident->EqualsIgnoreCase("auto")) {
for (int i = 0; i < 4; i++) {
aDeclaration->AppendValue(kClipNames[i], nsCSSValue(eCSSUnit_Auto));
}
return PR_TRUE;
} else if (ident->EqualsIgnoreCase("inherit")) {
for (int i = 0; i < 4; i++) {
aDeclaration->AppendValue(kClipNames[i], nsCSSValue(eCSSUnit_Inherit));
}
return PR_TRUE;
} else if (ident->EqualsIgnoreCase("rect")) {
if (!ExpectSymbol(aErrorCode, '(', PR_TRUE)) {
return PR_FALSE;
}
for (int i = 0; i < 4; i++) {
if (!ParseVariant(aErrorCode, aDeclaration, kClipNames[i], VARIANT_AL, nsnull)) {
return PR_FALSE;
}
if (3 != i) {
// skip optional commas between elements
ExpectSymbol(aErrorCode, ',', PR_TRUE);
}
}
if (!ExpectSymbol(aErrorCode, ')', PR_TRUE)) {
return PR_FALSE;
}
return PR_TRUE;
} else {
UngetToken();
}
return PR_FALSE;
}
PRBool CSSParserImpl::ParseFont(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration,
const char* aName)
{
static const char* fontNames[] = {
"font-style",
"font-variant",
"font-weight",
};
// Get optional font-style, font-variant and font-weight (in any order)
PRInt32 found = ParseChoice(aErrorCode, aDeclaration, fontNames, 3);
if ((found & 1) == 0) {
// Provide default font-style
aDeclaration->AppendValue(fontNames[0],
nsCSSValue(NS_STYLE_FONT_STYLE_NORMAL, eCSSUnit_Enumerated));
}
if ((found & 2) == 0) {
// Provide default font-variant
aDeclaration->AppendValue(fontNames[1],
nsCSSValue(NS_STYLE_FONT_VARIANT_NORMAL, eCSSUnit_Enumerated));
}
if ((found & 4) == 0) {
// Provide default font-weight
aDeclaration->AppendValue(fontNames[2],
nsCSSValue(NS_STYLE_FONT_WEIGHT_NORMAL, eCSSUnit_Enumerated));
}
// Get mandatory font-size
if (!ParseVariant(aErrorCode, aDeclaration, "font-size",
VARIANT_KLP, kFontSizeKTable)) {
return PR_FALSE;
}
// Get optional "/" line-height
if (ExpectSymbol(aErrorCode, '/', PR_TRUE)) {
if (!ParseVariant(aErrorCode, aDeclaration, "line-height",
VARIANT_HLPN | VARIANT_NORMAL, nsnull)) {
return PR_FALSE;
}
}
// Get final mandatory font-family
return ParseFontFamily(aErrorCode, aDeclaration, "font-family");
}
PRBool CSSParserImpl::ParseFontFamily(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration,
const char* aName)
{
nsCSSToken* tk = &mToken;
nsAutoString family;
PRBool firstOne = PR_TRUE;
for (;;) {
if (!GetToken(aErrorCode, PR_TRUE)) {
break;
}
if (eCSSToken_Ident == tk->mType) {
if (!firstOne) {
family.Append(PRUnichar(','));
}
family.Append(tk->mIdent);
for (;;) {
if (!GetToken(aErrorCode, PR_FALSE)) {
break;
}
if (eCSSToken_Ident == tk->mType) {
family.Append(tk->mIdent);
} else if (eCSSToken_WhiteSpace == tk->mType) {
// Lookahead one token and drop whitespace if we ending the
// font name.
if (!GetToken(aErrorCode, PR_TRUE)) {
break;
}
if (eCSSToken_Ident != tk->mType) {
UngetToken();
break;
}
UngetToken();
family.Append(PRUnichar(' '));
} else {
UngetToken();
break;
}
}
firstOne = PR_FALSE;
} else if (eCSSToken_String == tk->mType) {
if (!firstOne) {
family.Append(PRUnichar(','));
}
family.Append(tk->mSymbol); // replace the quotes
family.Append(tk->mIdent);
family.Append(tk->mSymbol);
firstOne = PR_FALSE;
} else if (eCSSToken_Symbol == tk->mType) {
if (',' != tk->mSymbol) {
UngetToken();
break;
}
} else {
UngetToken();
break;
}
}
if (family.Length() == 0) {
return PR_FALSE;
}
aDeclaration->AppendValue(aName, nsCSSValue(family));
return PR_TRUE;
}
PRBool CSSParserImpl::ParseFontWeight(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration,
const char* aName)
{
static PRInt32 kFontWeightKTable[] = {
KEYWORD_NORMAL, NS_STYLE_FONT_WEIGHT_NORMAL,
KEYWORD_BOLD, NS_STYLE_FONT_WEIGHT_BOLD,
KEYWORD_BOLDER, NS_STYLE_FONT_WEIGHT_BOLDER,
KEYWORD_LIGHTER, NS_STYLE_FONT_WEIGHT_LIGHTER,
-1,
};
nsCSSToken* tk = &mToken;
if (!GetToken(aErrorCode, PR_TRUE)) {
return PR_FALSE;
}
if (eCSSToken_Ident == tk->mType) {
char cbuf[50];
tk->mIdent.ToCString(cbuf, sizeof(cbuf));
PRInt32 kid = nsCSSKeywords::LookupName(cbuf);
PRInt32 ix = SearchKeywordTable(kid, kFontWeightKTable);
if (ix < 0) {
UngetToken();
return PR_FALSE;
}
aDeclaration->AppendValue(aName, nsCSSValue(kFontWeightKTable[ix+1], eCSSUnit_Enumerated));
} else if (eCSSToken_Number == tk->mType) {
PRInt32 v = (PRInt32) tk->mNumber;
if (v < 100) v = 100;
else if (v > 900) v = 900;
v = v - (v % 100);
aDeclaration->AppendValue(aName, nsCSSValue(v, eCSSUnit_Integer));
} else {
UngetToken();
return PR_FALSE;
}
return PR_TRUE;
}
PRBool CSSParserImpl::ParseListStyle(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration)
{
const char* lst = "list-style-type";
const char* lsp = "list-style-position";
const char* lsi = "list-style-image";
int found = 0;
for (int i = 0; i < 3; i++) {
if (((found & 1) == 0) &&
ParseEnum(aErrorCode, aDeclaration, lst, kListStyleKTable)) {
found |= 1;
continue;
}
if (((found & 2) == 0) &&
ParseEnum(aErrorCode, aDeclaration, lsp, kListStylePositionKTable)) {
found |= 2;
continue;
}
if ((found & 4) == 0) {
if (!GetToken(aErrorCode, PR_TRUE)) {
break;
}
if (eCSSToken_URL == mToken.mType) {
aDeclaration->AppendValue(lsi, nsCSSValue(mToken.mIdent));
found |= 4;
continue;
} else {
if (eCSSToken_Symbol == mToken.mType) {
PRUnichar symbol = mToken.mSymbol;
if ((';' == symbol) || ('}' == symbol)) {
UngetToken();
break;
}
}
// We got something strange. That's an error.
UngetToken();
return PR_FALSE;
}
}
}
if (found == 0) {
return PR_FALSE;
}
// Provide default values
if ((found & 1) == 0) {
aDeclaration->AppendValue(lst, nsCSSValue(NS_STYLE_LIST_STYLE_DISC, eCSSUnit_Enumerated));
}
if ((found & 2) == 0) {
aDeclaration->AppendValue(lsp, nsCSSValue(NS_STYLE_LIST_STYLE_POSITION_OUTSIDE, eCSSUnit_Enumerated));
}
if ((found & 4) == 0) {
aDeclaration->AppendValue(lsi, nsCSSValue(NS_STYLE_LIST_STYLE_IMAGE_NONE, eCSSUnit_Enumerated));
}
return PR_TRUE;
}
PRBool CSSParserImpl::ParseMargin(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration)
{
static const char* kBoxMarginSideNames[] = {
"margin-top",
"margin-right",
"margin-bottom",
"margin-left",
};
return ParseBoxProperties(aErrorCode, aDeclaration, kBoxMarginSideNames);
}
PRBool CSSParserImpl::ParsePadding(PRInt32* aErrorCode, nsICSSDeclaration* aDeclaration)
{
static const char* kBoxPaddingSideNames[] = {
"padding-top",
"padding-right",
"padding-bottom",
"padding-left",
};
return ParseBoxProperties(aErrorCode, aDeclaration, kBoxPaddingSideNames);
}
PRBool CSSParserImpl::ParseTextDecoration(PRInt32* aErrorCode,
nsICSSDeclaration* aDeclaration,
const char* aName)
{
static PRInt32 kTextDecorationNoneKTable[] = {
KEYWORD_NONE, NS_STYLE_TEXT_DECORATION_NONE,
-1
};
static PRInt32 kTextDecorationKTable[] = {
KEYWORD_UNDERLINE, NS_STYLE_TEXT_DECORATION_UNDERLINE,
KEYWORD_OVERLINE, NS_STYLE_TEXT_DECORATION_OVERLINE,
KEYWORD_LINE_THROUGH, NS_STYLE_TEXT_DECORATION_LINE_THROUGH,
KEYWORD_BLINK, NS_STYLE_TEXT_DECORATION_BLINK,
-1,
};
if (ParseEnum(aErrorCode, aDeclaration, aName, kTextDecorationNoneKTable)) {
return PR_TRUE;
}
PRInt32 decoration = 0;
for (int i = 0; i < 4; i++) {
nsString* ident = NextIdent(aErrorCode);
if (nsnull == ident) {
break;
}
char cbuf[50];
ident->ToCString(cbuf, sizeof(cbuf));
PRInt32 id = nsCSSKeywords::LookupName(cbuf);
PRInt32 ix = SearchKeywordTable(id, kTextDecorationKTable);
if (ix < 0) {
UngetToken();
break;
}
decoration |= kTextDecorationKTable[ix+1];
}
if (0 == decoration) {
return PR_FALSE;
}
aDeclaration->AppendValue(aName, nsCSSValue(decoration, eCSSUnit_Integer));
return PR_TRUE;
}
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