emitterstate.cpp

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#include "emitterstate.h"
#include "yaml-cpp-pm/exceptions.h"
#include <limits>

namespace YAML_PM
{
        EmitterState::EmitterState(): m_isGood(true), m_curIndent(0), m_requiresSoftSeparation(false), m_requiresHardSeparation(false)
        {
                // start up
                m_stateStack.push(ES_WAITING_FOR_DOC);
                
                // set default global manipulators
                m_charset.set(EmitNonAscii);
                m_strFmt.set(Auto);
                m_boolFmt.set(TrueFalseBool);
                m_boolLengthFmt.set(LongBool);
                m_boolCaseFmt.set(LowerCase);
                m_intFmt.set(Dec);
                m_indent.set(2);
                m_preCommentIndent.set(2);
                m_postCommentIndent.set(1);
                m_seqFmt.set(Block);
                m_mapFmt.set(Block);
                m_mapKeyFmt.set(Auto);
        m_floatPrecision.set(6);
        m_doublePrecision.set(15);
        }
        
        EmitterState::~EmitterState()
        {
        }

        // SetLocalValue
        // . We blindly tries to set all possible formatters to this value
        // . Only the ones that make sense will be accepted
        void EmitterState::SetLocalValue(EMITTER_MANIP value)
        {
                SetOutputCharset(value, LOCAL);
                SetStringFormat(value, LOCAL);
                SetBoolFormat(value, LOCAL);
                SetBoolCaseFormat(value, LOCAL);
                SetBoolLengthFormat(value, LOCAL);
                SetIntFormat(value, LOCAL);
                SetFlowType(GT_SEQ, value, LOCAL);
                SetFlowType(GT_MAP, value, LOCAL);
                SetMapKeyFormat(value, LOCAL);
        }
        
        void EmitterState::BeginGroup(GROUP_TYPE type)
        {
                unsigned lastIndent = (m_groups.empty() ? 0 : m_groups.top().indent);
                m_curIndent += lastIndent;
                
                std::auto_ptr<Group> pGroup(new Group(type));
                
                // transfer settings (which last until this group is done)
                pGroup->modifiedSettings = m_modifiedSettings;

                // set up group
                pGroup->flow = GetFlowType(type);
                pGroup->indent = GetIndent();
                pGroup->usingLongKey = (GetMapKeyFormat() == LongKey ? true : false);

                m_groups.push(pGroup);
        }
        
        void EmitterState::EndGroup(GROUP_TYPE type)
        {
                if(m_groups.empty())
                        return SetError(ErrorMsg::UNMATCHED_GROUP_TAG);
                
                // get rid of the current group
                {
                        std::auto_ptr<Group> pFinishedGroup = m_groups.pop();
                        if(pFinishedGroup->type != type)
                                return SetError(ErrorMsg::UNMATCHED_GROUP_TAG);
                }

                // reset old settings
                unsigned lastIndent = (m_groups.empty() ? 0 : m_groups.top().indent);
                assert(m_curIndent >= lastIndent);
                m_curIndent -= lastIndent;
                
                // some global settings that we changed may have been overridden
                // by a local setting we just popped, so we need to restore them
                m_globalModifiedSettings.restore();
        }
                
        GROUP_TYPE EmitterState::GetCurGroupType() const
        {
                if(m_groups.empty())
                        return GT_NONE;
                
                return m_groups.top().type;
        }
        
        FLOW_TYPE EmitterState::GetCurGroupFlowType() const
        {
                if(m_groups.empty())
                        return FT_NONE;
                
                return (m_groups.top().flow == Flow ? FT_FLOW : FT_BLOCK);
        }
        
        bool EmitterState::CurrentlyInLongKey()
        {
                if(m_groups.empty())
                        return false;
                return m_groups.top().usingLongKey;
        }
        
        void EmitterState::StartLongKey()
        {
                if(!m_groups.empty())
                        m_groups.top().usingLongKey = true;
        }
        
        void EmitterState::StartSimpleKey()
        {
                if(!m_groups.empty())
                        m_groups.top().usingLongKey = false;
        }

        void EmitterState::ClearModifiedSettings()
        {
                m_modifiedSettings.clear();
        }

        bool EmitterState::SetOutputCharset(EMITTER_MANIP value, FMT_SCOPE scope)
        {
                switch(value) {
                        case EmitNonAscii:
                        case EscapeNonAscii:
                                _Set(m_charset, value, scope);
                                return true;
                        default:
                                return false;
                }
        }
        
        bool EmitterState::SetStringFormat(EMITTER_MANIP value, FMT_SCOPE scope)
        {
                switch(value) {
                        case Auto:
                        case SingleQuoted:
                        case DoubleQuoted:
                        case Literal:
                                _Set(m_strFmt, value, scope);
                                return true;
                        default:
                                return false;
                }
        }
        
        bool EmitterState::SetBoolFormat(EMITTER_MANIP value, FMT_SCOPE scope)
        {
                switch(value) {
                        case OnOffBool:
                        case TrueFalseBool:
                        case YesNoBool:
                                _Set(m_boolFmt, value, scope);
                                return true;
                        default:
                                return false;
                }
        }

        bool EmitterState::SetBoolLengthFormat(EMITTER_MANIP value, FMT_SCOPE scope)
        {
                switch(value) {
                        case LongBool:
                        case ShortBool:
                                _Set(m_boolLengthFmt, value, scope);
                                return true;
                        default:
                                return false;
                }
        }

        bool EmitterState::SetBoolCaseFormat(EMITTER_MANIP value, FMT_SCOPE scope)
        {
                switch(value) {
                        case UpperCase:
                        case LowerCase:
                        case CamelCase:
                                _Set(m_boolCaseFmt, value, scope);
                                return true;
                        default:
                                return false;
                }
        }

        bool EmitterState::SetIntFormat(EMITTER_MANIP value, FMT_SCOPE scope)
        {
                switch(value) {
                        case Dec:
                        case Hex:
                        case Oct:
                                _Set(m_intFmt, value, scope);
                                return true;
                        default:
                                return false;
                }
        }

        bool EmitterState::SetIndent(unsigned value, FMT_SCOPE scope)
        {
                if(value == 0)
                        return false;
                
                _Set(m_indent, value, scope);
                return true;
        }

        bool EmitterState::SetPreCommentIndent(unsigned value, FMT_SCOPE scope)
        {
                if(value == 0)
                        return false;
                
                _Set(m_preCommentIndent, value, scope);
                return true;
        }
        
        bool EmitterState::SetPostCommentIndent(unsigned value, FMT_SCOPE scope)
        {
                if(value == 0)
                        return false;
                
                _Set(m_postCommentIndent, value, scope);
                return true;
        }

        bool EmitterState::SetFlowType(GROUP_TYPE groupType, EMITTER_MANIP value, FMT_SCOPE scope)
        {
                switch(value) {
                        case Block:
                        case Flow:
                                _Set(groupType == GT_SEQ ? m_seqFmt : m_mapFmt, value, scope);
                                return true;
                        default:
                                return false;
                }
        }

        EMITTER_MANIP EmitterState::GetFlowType(GROUP_TYPE groupType) const
        {
                // force flow style if we're currently in a flow
                FLOW_TYPE flowType = GetCurGroupFlowType();
                if(flowType == FT_FLOW)
                        return Flow;
                
                // otherwise, go with what's asked of use
                return (groupType == GT_SEQ ? m_seqFmt.get() : m_mapFmt.get());
        }
        
        bool EmitterState::SetMapKeyFormat(EMITTER_MANIP value, FMT_SCOPE scope)
        {
                switch(value) {
                        case Auto:
                        case LongKey:
                                _Set(m_mapKeyFmt, value, scope);
                                return true;
                        default:
                                return false;
                }
        }

    bool EmitterState::SetFloatPrecision(int value, FMT_SCOPE scope)
    {
        if(value < 0 || value > std::numeric_limits<float>::digits10)
            return false;
        _Set(m_floatPrecision, value, scope);
        return true;
    }
    
    bool EmitterState::SetDoublePrecision(int value, FMT_SCOPE scope)
    {
        if(value < 0 || value > std::numeric_limits<double>::digits10)
            return false;
        _Set(m_doublePrecision, value, scope);
        return true;
    }
}