/
engine.go
162 lines (148 loc) · 4.25 KB
/
engine.go
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package main
import (
"fmt"
"sync"
)
type engine struct {
settings *Settings
env environmentInfo
renderer *Renderer
activeBlock *Block
activeSegment *Segment
previousActiveSegment *Segment
}
func (e *engine) getPowerlineColor(foreground bool) string {
if e.previousActiveSegment == nil {
return Transparent
}
if !foreground && e.activeSegment.Style != Powerline {
return Transparent
}
if foreground && e.previousActiveSegment.Style != Powerline {
return Transparent
}
return e.previousActiveSegment.Background
}
func (e *engine) writePowerLineSeparator(background, foreground string, end bool) {
symbol := e.activeSegment.PowerlineSymbol
if end {
symbol = e.previousActiveSegment.PowerlineSymbol
}
if e.activeSegment.InvertPowerline {
e.renderer.write(foreground, background, symbol)
return
}
e.renderer.write(background, foreground, symbol)
}
func (e *engine) endPowerline() {
if e.activeSegment != nil &&
e.activeSegment.Style != Powerline &&
e.previousActiveSegment != nil &&
e.previousActiveSegment.Style == Powerline {
e.writePowerLineSeparator(e.getPowerlineColor(false), e.previousActiveSegment.Background, true)
}
}
func (e *engine) renderPowerLineSegment(text string) {
e.writePowerLineSeparator(e.activeSegment.Background, e.getPowerlineColor(true), false)
e.renderText(text)
}
func (e *engine) renderPlainSegment(text string) {
e.renderText(text)
}
func (e *engine) renderDiamondSegment(text string) {
e.renderer.write(Transparent, e.activeSegment.Background, e.activeSegment.LeadingDiamond)
e.renderText(text)
e.renderer.write(Transparent, e.activeSegment.Background, e.activeSegment.TrailingDiamond)
}
func (e *engine) renderText(text string) {
prefix := e.activeSegment.getValue(Prefix, " ")
postfix := e.activeSegment.getValue(Postfix, " ")
e.renderer.write(e.activeSegment.Background, e.activeSegment.Foreground, fmt.Sprintf("%s%s%s", prefix, text, postfix))
}
func (e *engine) renderSegmentText(text string) {
switch e.activeSegment.Style {
case Plain:
e.renderPlainSegment(text)
case Diamond:
e.renderDiamondSegment(text)
case Powerline:
e.renderPowerLineSegment(text)
}
e.previousActiveSegment = e.activeSegment
}
func (e *engine) renderBlockSegments(block *Block) string {
defer e.reset()
e.activeBlock = block
e.setStringValues(block.Segments)
for _, segment := range block.Segments {
if !segment.active {
continue
}
e.activeSegment = segment
e.endPowerline()
text := segment.stringValue
e.activeSegment.Background = segment.props.background
e.activeSegment.Foreground = segment.props.foreground
e.renderSegmentText(text)
}
if e.previousActiveSegment != nil && e.previousActiveSegment.Style == Powerline {
e.writePowerLineSeparator(Transparent, e.previousActiveSegment.Background, true)
}
return e.renderer.string()
}
func (e *engine) setStringValues(segments []*Segment) {
wg := sync.WaitGroup{}
wg.Add(len(segments))
defer wg.Wait()
cwd := e.env.getcwd()
for _, segment := range segments {
go func(s *Segment) {
defer wg.Done()
err := s.mapSegmentWithWriter(e.env)
if err == nil && !s.hasValue(IgnoreFolders, cwd) && s.enabled() {
s.stringValue = s.string()
}
}(segment)
}
}
func (e *engine) render() {
for _, block := range e.settings.Blocks {
// if line break, append a line break
if block.Type == LineBreak {
e.renderer.print("\n")
continue
}
if block.VerticalOffset != 0 {
e.renderer.print(e.renderer.changeLine(block.VerticalOffset))
}
switch block.Alignment {
case Right:
e.renderer.print(e.renderer.carriageForward())
blockText := e.renderBlockSegments(block)
cursorMove := e.renderer.setCursorForRightWrite(blockText, block.HorizontalOffset)
e.renderer.print(cursorMove)
e.renderer.print(blockText)
case Left:
e.renderer.print(e.renderBlockSegments(block))
}
}
if e.settings.ConsoleTitle {
switch e.settings.ConsoleTitleStyle {
case FullPath:
e.renderer.setConsoleTitle(e.env.getcwd())
case FolderName:
fallthrough
default:
e.renderer.setConsoleTitle(base(e.env.getcwd(), e.env))
}
}
e.renderer.creset()
if e.settings.FinalSpace {
e.renderer.print(" ")
}
}
func (e *engine) reset() {
e.renderer.reset()
e.previousActiveSegment = nil
e.activeBlock = nil
}