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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/dom/CSSLexer.h"
#include "js/Value.h"
#include "mozilla/dom/CSSLexerBinding.h"
#include "mozilla/dom/ToJSValue.h"
namespace mozilla {
namespace dom {
// Ensure that constants are consistent.
#define CHECK(X, Y) \
static_assert(static_cast<int>(X) == static_cast<int>(Y), \
"nsCSSToken and CSSTokenType should have identical values")
CHECK(eCSSToken_Whitespace, CSSTokenType::Whitespace);
CHECK(eCSSToken_Comment, CSSTokenType::Comment);
CHECK(eCSSToken_Ident, CSSTokenType::Ident);
CHECK(eCSSToken_Function, CSSTokenType::Function);
CHECK(eCSSToken_AtKeyword, CSSTokenType::At);
CHECK(eCSSToken_ID, CSSTokenType::Id);
CHECK(eCSSToken_Hash, CSSTokenType::Hash);
CHECK(eCSSToken_Number, CSSTokenType::Number);
CHECK(eCSSToken_Dimension, CSSTokenType::Dimension);
CHECK(eCSSToken_Percentage, CSSTokenType::Percentage);
CHECK(eCSSToken_String, CSSTokenType::String);
CHECK(eCSSToken_Bad_String, CSSTokenType::Bad_string);
CHECK(eCSSToken_URL, CSSTokenType::Url);
CHECK(eCSSToken_Bad_URL, CSSTokenType::Bad_url);
CHECK(eCSSToken_Symbol, CSSTokenType::Symbol);
CHECK(eCSSToken_Includes, CSSTokenType::Includes);
CHECK(eCSSToken_Dashmatch, CSSTokenType::Dashmatch);
CHECK(eCSSToken_Beginsmatch, CSSTokenType::Beginsmatch);
CHECK(eCSSToken_Endsmatch, CSSTokenType::Endsmatch);
CHECK(eCSSToken_Containsmatch, CSSTokenType::Containsmatch);
CHECK(eCSSToken_URange, CSSTokenType::Urange);
CHECK(eCSSToken_HTMLComment, CSSTokenType::Htmlcomment);
#undef CHECK
CSSLexer::CSSLexer(const nsAString& aText)
: mInput(aText)
, mScanner(mInput, 1)
{
}
CSSLexer::~CSSLexer()
{
}
bool
CSSLexer::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto,
JS::MutableHandle<JSObject*> aReflector)
{
return CSSLexerBinding::Wrap(aCx, this, aGivenProto, aReflector);
}
uint32_t
CSSLexer::LineNumber()
{
// The scanner uses 1-based line numbers, but our callers expect
// 0-based.
return mScanner.GetLineNumber() - 1;
}
uint32_t
CSSLexer::ColumnNumber()
{
return mScanner.GetColumnNumber();
}
void
CSSLexer::PerformEOFFixup(const nsAString& aInputString, bool aPreserveBackslash,
nsAString& aResult)
{
aResult.Append(aInputString);
uint32_t eofChars = mScanner.GetEOFCharacters();
if (aPreserveBackslash &&
(eofChars & (nsCSSScanner::eEOFCharacters_DropBackslash |
nsCSSScanner::eEOFCharacters_ReplacementChar)) != 0) {
eofChars &= ~(nsCSSScanner::eEOFCharacters_DropBackslash |
nsCSSScanner::eEOFCharacters_ReplacementChar);
aResult.Append('\\');
}
if ((eofChars & nsCSSScanner::eEOFCharacters_DropBackslash) != 0 &&
aResult.Length() > 0 && aResult.Last() == '\\') {
aResult.Truncate(aResult.Length() - 1);
}
nsCSSScanner::AppendImpliedEOFCharacters(nsCSSScanner::EOFCharacters(eofChars),
aResult);
}
void
CSSLexer::NextToken(Nullable<CSSToken>& aResult)
{
nsCSSToken token;
if (!mScanner.Next(token, eCSSScannerExclude_None)) {
return;
}
CSSToken& resultToken(aResult.SetValue());
resultToken.mTokenType = static_cast<CSSTokenType>(token.mType);
resultToken.mStartOffset = mScanner.GetTokenOffset();
resultToken.mEndOffset = mScanner.GetTokenEndOffset();
switch (token.mType) {
case eCSSToken_Whitespace:
break;
case eCSSToken_Ident:
case eCSSToken_Function:
case eCSSToken_AtKeyword:
case eCSSToken_ID:
case eCSSToken_Hash:
resultToken.mText.Construct(token.mIdent);
break;
case eCSSToken_Dimension:
resultToken.mText.Construct(token.mIdent);
MOZ_FALLTHROUGH;
case eCSSToken_Number:
case eCSSToken_Percentage:
resultToken.mNumber.Construct(token.mNumber);
resultToken.mHasSign.Construct(token.mHasSign);
resultToken.mIsInteger.Construct(token.mIntegerValid);
break;
case eCSSToken_String:
case eCSSToken_Bad_String:
case eCSSToken_URL:
case eCSSToken_Bad_URL:
resultToken.mText.Construct(token.mIdent);
/* Don't bother emitting the delimiter, as it is readily extracted
from the source string when needed. */
break;
case eCSSToken_Symbol:
resultToken.mText.Construct(nsString(&token.mSymbol, 1));
break;
case eCSSToken_Includes:
case eCSSToken_Dashmatch:
case eCSSToken_Beginsmatch:
case eCSSToken_Endsmatch:
case eCSSToken_Containsmatch:
case eCSSToken_URange:
break;
case eCSSToken_Comment:
case eCSSToken_HTMLComment:
/* The comment text is easily extracted from the source string,
and is rarely useful. */
break;
}
}
} // namespace dom
} // namespace mozilla
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