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