python/api2/modules/py2JsonAttrPatternInfo.py

"""
Simple class to hold common information used by the JSON attribute pattern
reader and writer.  To use, make sure that pyJsonAttrPatternInfo.py is in
your Python path then do the following:

from pyJsonAttrPatternInfo import PyJsonAttrPatternInfo as JsonKeys
...
flagKeyword = JsonKeys.kKeyFlags
...
"""
from builtins import object
import sys
import maya.api.OpenMaya as omAPI

#======================================================================
def jsonDebug(dbgString):
    """
    Print out some debugging messages if the flag is turned on.
    Lazily I'm making the location to turn it on be right here as well.
    """
    debuggingJson = True
    if debuggingJson:
        print('JSON: %s' % dbgString)
        # Ensure the output gets seen immediately
        sys.stdout.flush()

#======================================================================
class PyJsonAttrPatternInfo(object):
    kPluginPatternFactoryName = 'json'

    # Keywords representing attribute data
    kKeyAcceptedTypes           = 'acceptedTypes'
    kKeyAcceptedNumericTypes    = 'acceptedNumericTypes'
    kKeyAcceptedPluginTypes     = 'acceptedPluginTypes'
    kKeyAttrType        = 'attributeType'
    kKeyFlags           = 'flags'
    kKeyName            = 'name'
    kKeyNiceName        = 'niceName'
    kKeyShortName       = 'shortName'
    kKeyCategories      = 'categories'
    kKeyEnumNames       = 'enumNames'
    kKeyDefault         = 'defaultValue'
    kKeyDisconnect      = 'disconnectBehavior'
    kKeyChildren        = 'children'
    kKeyMin             = 'min'
    kKeyMax             = 'max'
    kKeySoftMin         = 'softMin'
    kKeySoftMax         = 'softMax'
    #
    # Key = Keyword saying what type of number the numerical attribute is
    # Value = [Constant which defines that type in MFnNumericAttribute,
    #          Default value for that number type]
    # Note that the clever juxtaposition of numeric and unit types allows
    # the same code to be used for creating both.
    #
    kNumericTypes = { 'bool'    : omAPI.MFnNumericData.kBoolean,
                      'byte'    : omAPI.MFnNumericData.kByte,
                      'char'    : omAPI.MFnNumericData.kChar,
                      'short'   : omAPI.MFnNumericData.kShort,
                      'short2'  : omAPI.MFnNumericData.k2Short,
                      'short3'  : omAPI.MFnNumericData.k3Short,
                      'long'    : omAPI.MFnNumericData.kLong,
                      'int'     : omAPI.MFnNumericData.kInt,
                      'long2'   : omAPI.MFnNumericData.k2Long,
                      'int2'    : omAPI.MFnNumericData.k2Int,
                      'long3'   : omAPI.MFnNumericData.k3Long,
                      'int3'    : omAPI.MFnNumericData.k3Int,
                      'float'   : omAPI.MFnNumericData.kFloat,
                      'float2'  : omAPI.MFnNumericData.k2Float,
                      'float3'  : omAPI.MFnNumericData.k3Float,
                      'double'  : omAPI.MFnNumericData.kDouble,
                      'double2' : omAPI.MFnNumericData.k2Double,
                      'double3' : omAPI.MFnNumericData.k3Double,
                      'double4' : omAPI.MFnNumericData.k4Double,
                      'addr'    : omAPI.MFnNumericData.kAddr,
                      'angle'   : omAPI.MFnUnitAttribute.kAngle,
                      'distance': omAPI.MFnUnitAttribute.kDistance,
                      'time'    : omAPI.MFnUnitAttribute.kTime }
    #
    # Non-numeric attribute types
    #
    kTypeCompound = 'compound'
    kTypeEnum = 'enum'
    kTypeString = 'string'
    kTypeTyped = 'typed'
    kTypeMatrix = ['floatMatrix', 'doubleMatrix']
    kTypeMatrixTypes = { kTypeMatrix[0] : omAPI.MFnMatrixAttribute.kFloat,
                         kTypeMatrix[1] : omAPI.MFnMatrixAttribute.kDouble }
    kTypeLightData = 'lightData'
    kTypeMessage = 'message'
    # MFnData.kPlugin is deliberately ignored in the API so skip it
    kGenericTypes = { 'numeric'         : omAPI.MFnData.kNumeric,
                      'pluginGeometry'  : omAPI.MFnData.kPluginGeometry,
                      'string'          : omAPI.MFnData.kString,
                      'matrix'          : omAPI.MFnData.kMatrix,
                      'stringArray'     : omAPI.MFnData.kStringArray,
                      'doubleArray'     : omAPI.MFnData.kDoubleArray,
                      'intArray'        : omAPI.MFnData.kIntArray,
                      'pointArray'      : omAPI.MFnData.kPointArray,
                      'vectorArray'     : omAPI.MFnData.kVectorArray,
                      'componentList'   : omAPI.MFnData.kComponentList,
                      'mesh'            : omAPI.MFnData.kMesh,
                      'lattice'         : omAPI.MFnData.kLattice,
                      'nurbsCurve'      : omAPI.MFnData.kNurbsCurve,
                      'nurbsSurface'    : omAPI.MFnData.kNurbsSurface,
                      'sphere'          : omAPI.MFnData.kSphere,
                      'dynArrayAttrs'   : omAPI.MFnData.kDynArrayAttrs,
                      'dynSweptGeometry': omAPI.MFnData.kDynSweptGeometry,
                      'subdSurface'     : omAPI.MFnData.kSubdSurface,
                      'nObject'         : omAPI.MFnData.kNObject,
                      'nId'             : omAPI.MFnData.kNId }

    # List of keywords defining the flag to be set (preceded with "!" to unset
    # it). The values correspond to the attribute names in the MPy object.
    #
    kFlagFunctions = { 'readable'               : 'readable',
                       'writable'               : 'writable',
                       'canconnectassrc'        : 'readable',
                       'canconnectasdst'        : 'writable',
                       'connectable'            : 'connectable',
                       'storable'               : 'storable',
                       'cached'                 : 'cached',
                       'array'                  : 'array',
                       'indexmatters'           : 'indexMatters',
                       'keyable'                : 'keyable',
                       'channelbox'             : 'channelBox',
                       'hidden'                 : 'hidden',
                       'usedascolor'            : 'usedAsColor',
                       'indeterminant'          : 'indeterminant',
                       'rendersource'           : 'renderSource',
                       'worldspace'             : 'worldSpace',
                       'affectsworldspace'      : 'affectsWorldSpace',
                       'usedasfilename'         : 'usedAsFilename',
                       'affectsappearance'      : 'affectsAppearance',
                       'usesarraydatabuilder'   : 'usesArrayDataBuilder',
                       'internal'               : 'internal' }

    # The list of legal disconnect behavior types (see MFnAttribute
    # documentation for what they mean.
    #
    kDisconnectBehaviors = { 'delete'  : omAPI.MFnAttribute.kDelete,
                             'reset'   : omAPI.MFnAttribute.kReset,
                             'nothing' : omAPI.MFnAttribute.kNothing }

#-
# ==========================================================================
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