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#include "replacetoken.h"

#include "tokenreplacements.h"

#include <QByteArray>

QT_BEGIN_NAMESPACE

/*

    Add an entry to the tokenRuleLookup map for each token replacement rule.

*/

ReplaceToken::ReplaceToken(const QList<TokenReplacement*> &tokenReplacementRules)

:tokenReplacementRules(tokenReplacementRules)

{

    foreach (TokenReplacement* rep, tokenReplacementRules) {

        QByteArray key = rep->getReplaceKey();

        if(!key.isEmpty()) {

            tokenRuleLookup.insert(key, rep);

        }

    }

}

TextReplacements ReplaceToken::getTokenTextReplacements(const TokenEngine::TokenContainer &container)

{

    TextReplacements textReplacements;

    int t=0;

    const int numTokens = container.count();

    while(t < numTokens) {

        QByteArray tokenText = container.text(t);

        bool changed = false;

        if(isPreprocessorDirective(tokenText)) {

            foreach(TokenReplacement *tokenReplacementRule, tokenReplacementRules) {

                if(!changed)

                    changed = tokenReplacementRule->doReplace(container, t, textReplacements);

                if(changed)

                    break;

            }

        } else if (isInterestingToken(tokenText.trimmed())) {

            foreach (TokenReplacement* value, tokenRuleLookup.values(tokenText)) {

                changed = value->doReplace(container, t, textReplacements);

                if(changed) {

                    goto end;

                }

            }

        }

    end:

        ++t;

    }

    return textReplacements;

}

bool ReplaceToken::isInterestingToken(const QByteArray &text)

{

    return !(text.isEmpty() || text==";" || text=="(" || text==")" || text=="{" || text=="}" || text=="="

            || text=="+=" || text=="-=" || text=="if" || text=="then" || text=="else"

    );

}

bool ReplaceToken::isPreprocessorDirective(const QByteArray &token)

{

    return (token[0]=='#');

}

QT_END_NAMESPACE