gilo/internal/editor/editor.go

package editor

import (
	"timshome.page/gilo/internal/char"
	"timshome.page/gilo/internal/terminal"
)

type editor struct {
	rows int
	cols int
}

func New() *editor {
	cols, rows := terminal.Size()

	e := new(editor)
	e.cols = cols
	e.rows = rows

	return e
}

func (e *editor) RefreshScreen() {
	terminal.ANSICode(terminal.ClearScreen)
	terminal.ANSICode(terminal.ResetCursor)

	e.drawRows()

	terminal.ANSICode(terminal.ResetCursor)
}

func (e *editor) ProcessKeypress() bool {
	ch, _ := terminal.ReadKey()

	// Clean up on exit
	if ch == char.Ctrl('q') {
		terminal.ANSICode(terminal.ClearScreen)
		terminal.ANSICode(terminal.ResetCursor)

		return false
	}

	// Ugliest syntax structure ever?
	switch {
	case char.IsCtrl(ch):
		terminal.WriteLn("%d", ch)
	default:
		terminal.WriteLn("%d ('%c')", ch, ch)
	}

	return true
}

func (e *editor) drawRows() {
	for y :=0; y < e.rows; y += 1 {
		terminal.Write("~")

		if y < (e.rows - 1) {
			terminal.Write("\r\n")
		}
	}
}