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package diff
import "github.com/poy/onpar/diff/str"
type baseDiff struct {
actual, expected []rune
sections []str.DiffSection
cost float64
}
func (d *baseDiff) equal() bool {
if len(d.actual) != len(d.expected) {
return false
}
for i, ar := range d.actual {
if ar != d.expected[i] {
return false
}
}
return true
}
func (d *baseDiff) calculate() {
if d.sections != nil {
return
}
d.sections = []str.DiffSection{{Actual: d.actual, Expected: d.expected}}
if d.equal() {
d.sections[0].Type = str.TypeMatch
return
}
d.sections[0].Type = str.TypeReplace
if len(d.actual) > len(d.expected) {
d.cost = float64(len(d.actual))
return
}
d.cost = float64(len(d.expected))
}
func (d *baseDiff) Cost() float64 {
d.calculate()
return d.cost
}
func (d *baseDiff) Sections() []str.DiffSection {
d.calculate()
return d.sections
}
func baseStringDiff(actual, expected []rune) str.Diff {
return &baseDiff{actual: actual, expected: expected}
}
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