mirror of https://github.com/liamg/aminal.git
114 lines
2.5 KiB
Go
114 lines
2.5 KiB
Go
package terminal
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// https://www.xfree86.org/4.8.0/ctlseqs.html
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// https://vt100.net/docs/vt100-ug/chapter3.html
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var ansiSequenceMap = map[rune]escapeSequenceHandler{
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'[': csiHandler,
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0x5d: oscHandler,
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'7': saveCursorHandler,
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'8': restoreCursorHandler,
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'D': indexHandler,
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'M': reverseIndexHandler,
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}
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func indexHandler(buffer chan rune, terminal *Terminal) error {
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// @todo is thus right?
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// "This sequence causes the active position to move downward one line without changing the column position. If the active position is at the bottom margin, a scroll up is performed."
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if terminal.buffer.CursorLine() == terminal.buffer.ViewHeight()-1 {
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terminal.buffer.NewLine()
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return nil
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}
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terminal.buffer.MovePosition(0, 1)
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return nil
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}
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func reverseIndexHandler(buffer chan rune, terminal *Terminal) error {
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terminal.buffer.MovePosition(0, -1)
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return nil
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}
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func saveCursorHandler(buffer chan rune, terminal *Terminal) error {
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terminal.buffer.SaveCursor()
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return nil
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}
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func restoreCursorHandler(buffer chan rune, terminal *Terminal) error {
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terminal.buffer.RestoreCursor()
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return nil
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}
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func ansiHandler(buffer chan rune, terminal *Terminal) error {
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// if the byte is an escape character, read the next byte to determine which one
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b := <-buffer
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handler, ok := ansiSequenceMap[b]
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if ok {
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return handler(buffer, terminal)
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}
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switch b {
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case 'c':
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terminal.logger.Errorf("RIS not yet supported")
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case '(':
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b = <-buffer
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switch b {
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case 'A': //uk @todo handle these?
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//terminal.charSet = C0
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case 'B': //us
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//terminal.charSet = C0
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}
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case ')':
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b = <-buffer
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switch b {
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case 'A': //uk @todo handle these?
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//terminal.charSet = C1
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case 'B': //us
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//terminal.charSet = C1
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}
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case '*':
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b = <-buffer
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switch b {
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case 'A': //uk @todo handle these?
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//terminal.charSet = C2
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case 'B': //us
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//terminal.charSet = C2
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}
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case '+':
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b = <-buffer
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switch b {
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case 'A': //uk @todo handle these?
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//terminal.charSet = C3
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case 'B': //us
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//terminal.charSet = C3
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}
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case '>':
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// numeric char selection @todo
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case '=':
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//alternate char selection @todo
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case '?':
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pm := ""
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for {
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b = <-buffer
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switch b {
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case 'h':
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switch pm {
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default:
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terminal.logger.Errorf("Unknown private code ESC?%sh", pm)
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}
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case 'l':
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switch pm {
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default:
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terminal.logger.Errorf("Unknown private code ESC?%sl", pm)
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}
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default:
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pm += string(b)
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}
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}
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default:
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terminal.logger.Errorf("Unknown control sequence: 0x%02X [%s]", b, string(b))
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}
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return nil
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}
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