C++ SourceCode::firstLine方法代码示例

UnlinkedFunctionExecutable::UnlinkedFunctionExecutable(VM* vm, Structure* structure, const SourceCode& source, RefPtr<SourceProvider>&& sourceOverride, FunctionBodyNode* node, UnlinkedFunctionKind kind)
    : Base(*vm, structure)
    , m_name(node->ident())
    , m_inferredName(node->inferredName())
    , m_parameters(node->parameters())
    , m_sourceOverride(WTF::move(sourceOverride))
    , m_firstLineOffset(node->firstLine() - source.firstLine())
    , m_lineCount(node->lastLine() - node->firstLine())
    , m_unlinkedFunctionNameStart(node->functionNameStart() - source.startOffset())
    , m_unlinkedBodyStartColumn(node->startColumn())
    , m_unlinkedBodyEndColumn(m_lineCount ? node->endColumn() : node->endColumn() - node->startColumn())
    , m_startOffset(node->source().startOffset() - source.startOffset())
    , m_sourceLength(node->source().length())
    , m_parametersStartOffset(node->parametersStart())
    , m_typeProfilingStartOffset(node->functionKeywordStart())
    , m_typeProfilingEndOffset(node->startStartOffset() + node->source().length() - 1)
    , m_features(0)
    , m_isInStrictContext(node->isInStrictContext())
    , m_hasCapturedVariables(false)
    , m_isBuiltinFunction(kind == UnlinkedBuiltinFunction)
    , m_constructorKind(static_cast<unsigned>(node->constructorKind()))
    , m_functionMode(node->functionMode())
{
    ASSERT(m_constructorKind == static_cast<unsigned>(node->constructorKind()));
}

void Lexer<T>::setCode(const SourceCode& source, ParserArena* arena)
{
    m_arena = &arena->identifierArena();
    
    m_lineNumber = source.firstLine();
    m_delimited = false;
    m_lastToken = -1;
    
    const StringImpl* sourceString = source.provider()->data();

    if (sourceString)
        setCodeStart(sourceString);
    else
        m_codeStart = 0;

    m_source = &source;
    m_code = m_codeStart + source.startOffset();
    m_codeEnd = m_codeStart + source.endOffset();
    m_error = false;
    m_atLineStart = true;
    m_lexErrorMessage = UString();
    
    m_buffer8.reserveInitialCapacity(initialReadBufferCapacity);
    m_buffer16.reserveInitialCapacity((m_codeEnd - m_code) / 2);
    
    if (LIKELY(m_code < m_codeEnd))
        m_current = *m_code;
    else
        m_current = -1;
    ASSERT(currentOffset() == source.startOffset());
}

PassOwnPtr<ScheduledAction> ScheduledAction::create(ExecState* exec, DOMWrapperWorld* isolatedWorld, ContentSecurityPolicy* policy)
{
    JSValue v = exec->argument(0);
    CallData callData;
    CallType callType = getCallData(v, callData);
    if (callType == CallTypeNone) {
        if (policy && !policy->allowEval())
            return nullptr;
        UString string = v.toString(exec)->value(exec);
        if (exec->hadException())
            return nullptr;
        return adoptPtr(new ScheduledAction(ustringToString(string), isolatedWorld));
    }

    // WebERA this calculates a unique indification of the called function scheduled in this action.

    if (callType == CallTypeJS) {
        const SourceCode source = callData.js.functionExecutable->source();
        WTF::String url = WebCore::decodeURLEscapeSequences(WTF::String(source.provider()->url().utf8().data()));

        uint calledLine = source.firstLine();

        return adoptPtr(new ScheduledAction(exec, v, isolatedWorld, url.ascii().data(), calledLine));
    }

    return adoptPtr(new ScheduledAction(exec, v, isolatedWorld, "<native-function>", -1));
}

void Lexer::setCode(const SourceCode& source, ParserArena& arena)
{
    m_arena = &arena.identifierArena();

    m_lineNumber = source.firstLine();
    m_delimited = false;
    m_lastToken = -1;

    const UChar* data = source.provider()->data();

    m_source = &source;
    m_codeStart = data;
    m_code = data + source.startOffset();
    m_codeEnd = data + source.endOffset();
    m_error = false;
    m_atLineStart = true;

    // ECMA-262 calls for stripping all Cf characters, but we only strip BOM characters.
    // See <https://bugs.webkit.org/show_bug.cgi?id=4931> for details.
    if (source.provider()->hasBOMs()) {
        for (const UChar* p = m_codeStart; p < m_codeEnd; ++p) {
            if (UNLIKELY(*p == byteOrderMark)) {
                copyCodeWithoutBOMs();
                break;
            }
        }
    }

    // Read the first characters into the 4-character buffer.
    shift4();
    ASSERT(currentOffset() == source.startOffset());
}

UnlinkedFunctionExecutable::UnlinkedFunctionExecutable(VM* vm, Structure* structure, const SourceCode& source, RefPtr<SourceProvider>&& sourceOverride, FunctionMetadataNode* node, UnlinkedFunctionKind kind, ConstructAbility constructAbility, VariableEnvironment& parentScopeTDZVariables, DerivedContextType derivedContextType)
    : Base(*vm, structure)
    , m_name(node->ident())
    , m_inferredName(node->inferredName())
    , m_sourceOverride(WTF::move(sourceOverride))
    , m_firstLineOffset(node->firstLine() - source.firstLine())
    , m_lineCount(node->lastLine() - node->firstLine())
    , m_unlinkedFunctionNameStart(node->functionNameStart() - source.startOffset())
    , m_unlinkedBodyStartColumn(node->startColumn())
    , m_unlinkedBodyEndColumn(m_lineCount ? node->endColumn() : node->endColumn() - node->startColumn())
    , m_startOffset(node->source().startOffset() - source.startOffset())
    , m_sourceLength(node->source().length())
    , m_parametersStartOffset(node->parametersStart())
    , m_typeProfilingStartOffset(node->functionKeywordStart())
    , m_typeProfilingEndOffset(node->startStartOffset() + node->source().length() - 1)
    , m_parameterCount(node->parameterCount())
    , m_parseMode(node->parseMode())
    , m_features(0)
    , m_isInStrictContext(node->isInStrictContext())
    , m_hasCapturedVariables(false)
    , m_isBuiltinFunction(kind == UnlinkedBuiltinFunction)
    , m_constructAbility(static_cast<unsigned>(constructAbility))
    , m_constructorKind(static_cast<unsigned>(node->constructorKind()))
    , m_functionMode(node->functionMode())
    , m_superBinding(static_cast<unsigned>(node->superBinding()))
    , m_derivedContextType(static_cast<unsigned>(derivedContextType))
{
    ASSERT(m_constructorKind == static_cast<unsigned>(node->constructorKind()));
    m_parentScopeTDZVariables.swap(parentScopeTDZVariables);
}

void Lexer::setCode(const SourceCode& source, ParserArena& arena)
{
    m_arena = &arena.identifierArena();

    m_lineNumber = source.firstLine();
    m_delimited = false;
    m_lastToken = -1;

    const UChar* data = source.provider()->data();

    m_source = &source;
    m_codeStart = data;
    m_code = data + source.startOffset();
    m_codeEnd = data + source.endOffset();
    m_error = false;
    m_atLineStart = true;

    m_buffer8.reserveInitialCapacity(initialReadBufferCapacity);
    m_buffer16.reserveInitialCapacity((m_codeEnd - m_code) / 2);

    if (LIKELY(m_code < m_codeEnd))
        m_current = *m_code;
    else
        m_current = -1;
    ASSERT(currentOffset() == source.startOffset());
}

FunctionExecutable* UnlinkedFunctionExecutable::link(VM& vm, const SourceCode& ownerSource, int overrideLineNumber)
{
    SourceCode source = m_sourceOverride ? SourceCode(m_sourceOverride) : ownerSource;
    unsigned firstLine = source.firstLine() + m_firstLineOffset;
    unsigned startOffset = source.startOffset() + m_startOffset;

    // Adjust to one-based indexing.
    bool startColumnIsOnFirstSourceLine = !m_firstLineOffset;
    unsigned startColumn = m_unlinkedBodyStartColumn + (startColumnIsOnFirstSourceLine ? source.startColumn() : 1);
    bool endColumnIsOnStartLine = !m_lineCount;
    unsigned endColumn = m_unlinkedBodyEndColumn + (endColumnIsOnStartLine ? startColumn : 1);

    SourceCode code(source.provider(), startOffset, startOffset + m_sourceLength, firstLine, startColumn);
    FunctionExecutable* result = FunctionExecutable::create(vm, code, this, firstLine, firstLine + m_lineCount, startColumn, endColumn);
    if (overrideLineNumber != -1)
        result->setOverrideLineNumber(overrideLineNumber);
    return result;
}

UnlinkedFunctionExecutable::UnlinkedFunctionExecutable(JSGlobalData* globalData, Structure* structure, const SourceCode& source, FunctionBodyNode* node)
    : Base(*globalData, structure)
    , m_numCapturedVariables(node->capturedVariableCount())
    , m_forceUsesArguments(node->usesArguments())
    , m_isInStrictContext(node->isStrictMode())
    , m_hasCapturedVariables(node->hasCapturedVariables())
    , m_name(node->ident())
    , m_inferredName(node->inferredName())
    , m_parameters(node->parameters())
    , m_firstLineOffset(node->firstLine() - source.firstLine())
    , m_lineCount(node->lastLine() - node->firstLine())
    , m_functionStartOffset(node->functionStart() - source.startOffset())
    , m_startOffset(node->source().startOffset() - source.startOffset())
    , m_sourceLength(node->source().length())
    , m_features(node->features())
    , m_functionNameIsInScopeToggle(node->functionNameIsInScopeToggle())
{
}

FunctionExecutable* UnlinkedFunctionExecutable::link(VM& vm, const SourceCode& ownerSource, Optional<int> overrideLineNumber, Intrinsic intrinsic)
{
    SourceCode source = m_sourceOverride ? SourceCode(m_sourceOverride) : ownerSource;
    unsigned firstLine = source.firstLine() + m_firstLineOffset;
    unsigned startOffset = source.startOffset() + m_startOffset;
    unsigned lineCount = m_lineCount;

    // Adjust to one-based indexing.
    bool startColumnIsOnFirstSourceLine = !m_firstLineOffset;
    unsigned startColumn = m_unlinkedBodyStartColumn + (startColumnIsOnFirstSourceLine ? source.startColumn() : 1);
    bool endColumnIsOnStartLine = !lineCount;
    unsigned endColumn = m_unlinkedBodyEndColumn + (endColumnIsOnStartLine ? startColumn : 1);

    SourceCode code(source.provider(), startOffset, startOffset + m_sourceLength, firstLine, startColumn);
    FunctionOverrides::OverrideInfo overrideInfo;
    bool hasFunctionOverride = false;

    if (UNLIKELY(Options::functionOverrides())) {
        hasFunctionOverride = FunctionOverrides::initializeOverrideFor(code, overrideInfo);
        if (hasFunctionOverride) {
            firstLine = overrideInfo.firstLine;
            lineCount = overrideInfo.lineCount;
            startColumn = overrideInfo.startColumn;
            endColumn = overrideInfo.endColumn;
            code = overrideInfo.sourceCode;
        }
    }

    FunctionExecutable* result = FunctionExecutable::create(vm, code, this, firstLine, firstLine + lineCount, startColumn, endColumn, intrinsic);
    if (overrideLineNumber)
        result->setOverrideLineNumber(*overrideLineNumber);

    if (UNLIKELY(hasFunctionOverride)) {
        result->overrideParameterAndTypeProfilingStartEndOffsets(
            overrideInfo.parametersStartOffset,
            overrideInfo.typeProfilingStartOffset,
            overrideInfo.typeProfilingEndOffset);
    }

    return result;
}

void WebDebugListenerImpl::sourceParsed(ExecState* execState, const SourceCode& source, int errorLine, const UString& errorMsg)
{
    if (m_listener && !m_inDebug) {
        m_inDebug = true;

        WebCore::String coreSourceURL = WebCore::ustringToString(source.provider()->url());
        WebCore::Frame *frame = static_cast<WebCore::JSDOMWindow*>(execState->lexicalGlobalObject())->impl()->frame();
        if (!(coreSourceURL.isNull() || coreSourceURL.isEmpty())) {
            WebCore::KURL sourceURL(WebCore::ParsedURLString, coreSourceURL);
            WebCore::KURL mappedURL;
            if(WebCore::FrameLoaderClientApollo::mapFrameUrl(frame, sourceURL, &mappedURL)) {
                coreSourceURL = mappedURL.string();
            }
        }

        WebCore::String coreErrorMsg = WebCore::ustringToString(errorMsg);

        WebCore::String coreSource(source.data(), source.length());

        m_listener->m_pVTable->sourceParsed(m_listener, source.provider()->asID(), coreSourceURL.webString(), coreSource.webString(), source.firstLine(), errorLine, coreErrorMsg.webString());

        m_inDebug = false;
    }
}