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77 lines
1.4 KiB
Go
77 lines
1.4 KiB
Go
/*
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Copyright (c) 2014 VMware, Inc. All Rights Reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package progress
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type scaledReport struct {
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Report
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n int
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i int
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}
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func (r scaledReport) Percentage() float32 {
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b := 100 * float32(r.i) / float32(r.n)
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return b + (r.Report.Percentage() / float32(r.n))
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}
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type scaleOne struct {
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s Sinker
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n int
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i int
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}
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func (s scaleOne) Sink() chan<- Report {
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upstream := make(chan Report)
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downstream := s.s.Sink()
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go s.loop(upstream, downstream)
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return upstream
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}
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func (s scaleOne) loop(upstream <-chan Report, downstream chan<- Report) {
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defer close(downstream)
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for r := range upstream {
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downstream <- scaledReport{
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Report: r,
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n: s.n,
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i: s.i,
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}
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}
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}
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type scaleMany struct {
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s Sinker
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n int
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i int
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}
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func Scale(s Sinker, n int) Sinker {
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return &scaleMany{
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s: s,
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n: n,
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}
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}
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func (s *scaleMany) Sink() chan<- Report {
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if s.i == s.n {
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s.n++
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}
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ch := scaleOne{s: s.s, n: s.n, i: s.i}.Sink()
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s.i++
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return ch
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}
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