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chain.go
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chain.go
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package optimize
import (
"github.com/dlocmelis/pdfreader/core"
"github.com/dlocmelis/pdfreader/model"
)
// Chain allows to use sequence of optimizers.
// It implements interface model.Optimizer.
type Chain struct {
optimizers []model.Optimizer
}
// Append appends optimizers to the chain.
func (c *Chain) Append(optimizers ...model.Optimizer) {
c.optimizers = append(c.optimizers, optimizers...)
}
// Optimize optimizes PDF objects to decrease PDF size.
func (c *Chain) Optimize(objects []core.PdfObject) (optimizedObjects []core.PdfObject, err error) {
optimizedObjects = objects
for _, optimizer := range c.optimizers {
optimizedObjects, err = optimizer.Optimize(optimizedObjects)
if err != nil {
return optimizedObjects, err
}
}
return optimizedObjects, nil
}