107 lines
2.5 KiB
Go
107 lines
2.5 KiB
Go
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package termutil
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func (t *Terminal) handleANSI(readChan chan MeasuredRune) (renderRequired bool) {
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// if the byte is an escape character, read the next byte to determine which one
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r := <-readChan
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t.log("ANSI SEQ %c 0x%X", r.Rune, r.Rune)
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switch r.Rune {
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case '[':
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return t.handleCSI(readChan)
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case ']':
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return t.handleOSC(readChan)
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case '(':
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return t.handleSCS0(readChan) // select character set into G0
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case ')':
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return t.handleSCS1(readChan) // select character set into G1
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case '*':
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return swallowHandler(1)(readChan) // character set bullshit
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case '+':
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return swallowHandler(1)(readChan) // character set bullshit
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case '>':
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return swallowHandler(0)(readChan) // numeric char selection
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case '=':
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return swallowHandler(0)(readChan) // alt char selection
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case '7':
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t.GetActiveBuffer().saveCursor()
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case '8':
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t.GetActiveBuffer().restoreCursor()
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case 'D':
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t.GetActiveBuffer().index()
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case 'E':
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t.GetActiveBuffer().newLineEx(true)
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case 'H':
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t.GetActiveBuffer().tabSetAtCursor()
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case 'M':
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t.GetActiveBuffer().reverseIndex()
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case 'P': // sixel
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t.handleSixel(readChan)
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case 'c':
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t.GetActiveBuffer().clear()
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case '#':
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return t.handleScreenState(readChan)
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case '^':
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return t.handlePrivacyMessage(readChan)
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default:
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t.log("UNKNOWN ESCAPE SEQUENCE: 0x%X", r.Rune)
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return false
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}
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return true
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}
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func swallowHandler(size int) func(pty chan MeasuredRune) bool {
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return func(pty chan MeasuredRune) bool {
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for i := 0; i < size; i++ {
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<-pty
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}
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return false
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}
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}
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func (t *Terminal) handleScreenState(readChan chan MeasuredRune) bool {
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b := <-readChan
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switch b.Rune {
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case '8': // DECALN -- Screen Alignment Pattern
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// hide cursor?
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buffer := t.GetActiveBuffer()
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buffer.resetVerticalMargins(uint(buffer.viewHeight))
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buffer.SetScrollOffset(0)
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// Fill the whole screen with E's
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count := buffer.ViewHeight() * buffer.ViewWidth()
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for count > 0 {
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buffer.write(MeasuredRune{Rune: 'E', Width: 1})
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count--
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if count > 0 && !buffer.modes.AutoWrap && count%buffer.ViewWidth() == 0 {
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buffer.index()
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buffer.carriageReturn()
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}
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}
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// restore cursor
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buffer.setPosition(0, 0)
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default:
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return false
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}
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return true
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}
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func (t *Terminal) handlePrivacyMessage(readChan chan MeasuredRune) bool {
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isEscaped := false
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for {
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b := <-readChan
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if b.Rune == 0x18 /*CAN*/ || b.Rune == 0x1a /*SUB*/ || (b.Rune == 0x5c /*backslash*/ && isEscaped) {
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break
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}
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if isEscaped {
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isEscaped = false
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} else if b.Rune == 0x1b {
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isEscaped = true
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continue
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}
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}
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return false
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}
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