draw2d/postscript-go/postscript/procedure.go

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2010-12-13 12:01:24 +00:00
// Copyright 2010 The postscript-go Authors. All rights reserved.
// created: 13/12/2010 by Laurent Le Goff
package postscript
type ProcedureDefinition struct {
Values []Value
}
func NewProcedureDefinition() *ProcedureDefinition {
proceduredef := new(ProcedureDefinition)
proceduredef.Values = make([]Value, 0, 100)
return proceduredef
}
func (p *ProcedureDefinition) Add(value Value) {
p.Values = append(p.Values, value)
}
type Procedure struct {
def *ProcedureDefinition
}
func NewProcedure(def *ProcedureDefinition) *Procedure {
return &Procedure{def}
}
func (p *Procedure) Execute(interpreter *Interpreter) {
for _, value := range p.def.Values {
if s, ok := value.(string); ok {
firstChar := s[0]
if firstChar != '(' && firstChar != '/' {
interpreter.computeReference(s)
} else {
interpreter.Push(value)
}
} else {
operator, isOperator := value.(Operator)
if isOperator {
operator.Execute(interpreter)
} else {
interpreter.Push(value)
}
}
}
}