mirror of
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108 lines
2.4 KiB
Go
108 lines
2.4 KiB
Go
package decor
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import (
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"strings"
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"github.com/acarl005/stripansi"
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"github.com/mattn/go-runewidth"
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)
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// Merge wraps its decorator argument with intention to sync width
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// with several decorators of another bar. Visual example:
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//
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// +----+--------+---------+--------+
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// | B1 | MERGE(D, P1, Pn) |
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// +----+--------+---------+--------+
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// | B2 | D0 | D1 | Dn |
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// +----+--------+---------+--------+
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//
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func Merge(decorator Decorator, placeholders ...WC) Decorator {
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if _, ok := decorator.Sync(); !ok || len(placeholders) == 0 {
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return decorator
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}
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md := &mergeDecorator{
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Decorator: decorator,
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wc: decorator.GetConf(),
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placeHolders: make([]*placeHolderDecorator, len(placeholders)),
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}
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decorator.SetConf(WC{})
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for i, wc := range placeholders {
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if (wc.C & DSyncWidth) == 0 {
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return decorator
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}
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md.placeHolders[i] = &placeHolderDecorator{wc.Init()}
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}
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return md
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}
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type mergeDecorator struct {
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Decorator
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wc WC
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placeHolders []*placeHolderDecorator
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}
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func (d *mergeDecorator) GetConf() WC {
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return d.wc
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}
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func (d *mergeDecorator) SetConf(conf WC) {
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d.wc = conf.Init()
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}
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func (d *mergeDecorator) MergeUnwrap() []Decorator {
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decorators := make([]Decorator, len(d.placeHolders))
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for i, ph := range d.placeHolders {
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decorators[i] = ph
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}
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return decorators
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}
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func (d *mergeDecorator) Sync() (chan int, bool) {
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return d.wc.Sync()
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}
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func (d *mergeDecorator) Base() Decorator {
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return d.Decorator
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}
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func (d *mergeDecorator) Decor(s Statistics) string {
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msg := d.Decorator.Decor(s)
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pureWidth := runewidth.StringWidth(msg)
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stripWidth := runewidth.StringWidth(stripansi.Strip(msg))
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cellCount := stripWidth
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if (d.wc.C & DextraSpace) != 0 {
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cellCount++
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}
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total := runewidth.StringWidth(d.placeHolders[0].FormatMsg(""))
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pw := (cellCount - total) / len(d.placeHolders)
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rem := (cellCount - total) % len(d.placeHolders)
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var diff int
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for i := 1; i < len(d.placeHolders); i++ {
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ph := d.placeHolders[i]
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width := pw - diff
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if (ph.WC.C & DextraSpace) != 0 {
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width--
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if width < 0 {
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width = 0
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}
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}
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max := runewidth.StringWidth(ph.FormatMsg(strings.Repeat(" ", width)))
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total += max
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diff = max - pw
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}
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d.wc.wsync <- pw + rem
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max := <-d.wc.wsync
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return d.wc.fill(msg, max+total+(pureWidth-stripWidth))
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}
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type placeHolderDecorator struct {
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WC
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}
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func (d *placeHolderDecorator) Decor(Statistics) string {
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return ""
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}
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