/
termbox-events.go
240 lines (225 loc) · 6.05 KB
/
termbox-events.go
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// termbox-events
package main
import (
"bytes"
"fmt"
"time"
"github.com/scrouthtv/gosc/internal/display"
"github.com/scrouthtv/gosc/internal/sheet"
"github.com/scrouthtv/gosc/internal/sheet/align"
"github.com/nsf/termbox-go"
)
type SheetMode int
const (
NORMAL_MODE SheetMode = iota
INSERT_MODE
EXIT_MODE
YANK_MODE
PUT_MODE
FORMAT_MODE
INFO_MODE
)
type insertTarget int
const (
INSERT_CELL insertTarget = iota
INSERT_SAVE_PATH
INSERT_EXPORT_PATH
)
// Processes all the key strokes from termbox.
//
// Also refreshes the two top rows the the display. The status bar and the command row.
func processTermboxEvents(s *sheet.Sheet) {
prompt := ""
stringEntry := false
smode := NORMAL_MODE
valBuffer := &bytes.Buffer{}
insAlign := align.AlignRight
insTarget := INSERT_CELL
info := ""
// Display editing prompt at the top of the screen.
go func() {
for range time.Tick(200 * time.Millisecond) {
switch smode {
case FORMAT_MODE:
display.DisplayValue(fmt.Sprintf("Current format is %s", s.DisplayFormat(s.SelectedCell)), 1, 0, 80, align.AlignLeft, false)
fallthrough
case NORMAL_MODE:
selSel, _ := s.GetCell(s.SelectedCell)
display.DisplayValue(fmt.Sprintf("%s (%s) [%s]", s.SelectedCell, s.DisplayFormat(s.SelectedCell), selSel.StatusBarVal()), 0, 0, 80, align.AlignLeft, false)
case INSERT_MODE:
display.DisplayValue(fmt.Sprintf("i> %s = %s", prompt, valBuffer.String()), 0, 0, 80, align.AlignLeft, false)
case EXIT_MODE:
display.DisplayValue(fmt.Sprintf("File \"%s\" is modified, save before exiting?", s.Filename), 0, 0, 80, align.AlignLeft, false)
case YANK_MODE:
display.DisplayValue("Yank row/column: r: row c: column", 0, 0, 80, align.AlignLeft, false)
case PUT_MODE:
display.DisplayValue("Put row/column: r: row c: column", 0, 0, 80, align.AlignLeft, false)
case INFO_MODE:
display.DisplayValue(info, 0, 0, 80, align.AlignLeft, false)
}
termbox.Flush()
}
}()
// Events
for {
ev := termbox.PollEvent()
if ev.Type == termbox.EventError {
smode = INFO_MODE
info = "error: " + ev.Err.Error()
}
switch smode {
case NORMAL_MODE, INFO_MODE:
switch ev.Key {
case termbox.KeyArrowUp:
s.MoveUp()
smode = NORMAL_MODE
case termbox.KeyArrowDown:
s.MoveDown()
smode = NORMAL_MODE
case termbox.KeyArrowLeft:
s.MoveLeft()
smode = NORMAL_MODE
case termbox.KeyArrowRight:
s.MoveRight()
smode = NORMAL_MODE
case 0:
switch ev.Ch {
case 'q':
smode = EXIT_MODE
case '=', 'i':
smode = INSERT_MODE
insTarget = INSERT_CELL
prompt = "let " + s.SelectedCell.String()
insAlign = align.AlignRight
case '<':
prompt = "leftstring " + s.SelectedCell.String()
smode = INSERT_MODE
insTarget = INSERT_CELL
insAlign = align.AlignLeft
stringEntry = true
case '>':
prompt = "rightstring " + s.SelectedCell.String()
smode = INSERT_MODE
insTarget = INSERT_CELL
insAlign = align.AlignRight
stringEntry = true
case '\\':
prompt = "label " + s.SelectedCell.String()
smode = INSERT_MODE
insTarget = INSERT_CELL
insAlign = align.AlignCenter
stringEntry = true
case 'h':
s.MoveLeft()
smode = NORMAL_MODE
case 'j':
s.MoveDown()
smode = NORMAL_MODE
case 'k':
s.MoveUp()
smode = NORMAL_MODE
case 'l':
s.MoveRight()
smode = NORMAL_MODE
case 'x':
s.ClearCell(s.SelectedCell)
smode = NORMAL_MODE
case 'y':
smode = YANK_MODE
case 'p':
smode = PUT_MODE
case 'f':
smode = FORMAT_MODE
case 'W':
prompt = "export path"
smode = INSERT_MODE
insTarget = INSERT_EXPORT_PATH
default:
info = "unknown command " + string(ev.Ch)
smode = INFO_MODE
}
}
case INSERT_MODE:
if ev.Key == termbox.KeyEnter {
switch insTarget {
case INSERT_CELL:
s.SetCell(s.SelectedCell, sheet.NewCell(valBuffer.String(), insAlign, stringEntry))
valBuffer.Reset()
smode = NORMAL_MODE
stringEntry = false
case INSERT_SAVE_PATH:
// TODO
case INSERT_EXPORT_PATH:
err := s.Export(valBuffer.String())
smode = INFO_MODE
if err != nil {
info = "error exporting: " + err.Error()
} else {
info = "successfully exported to " + valBuffer.String()
}
}
} else if ev.Key == termbox.KeyEsc {
valBuffer.Reset()
smode = NORMAL_MODE
stringEntry = false
} else if ev.Key == termbox.KeyBackspace || ev.Key == termbox.Key(127) {
if valBuffer.Len() == 0 {
continue
}
valBuffer = bytes.NewBuffer(valBuffer.Bytes()[:valBuffer.Len()-1])
} else {
valBuffer.WriteRune(ev.Ch)
}
case EXIT_MODE:
if ev.Key == 0 && ev.Ch == 'y' {
s.Save()
}
termbox.Close()
return
case YANK_MODE:
if ev.Key == 0 && ev.Ch == 'r' {
s.YankRow()
} else if ev.Key == 0 && ev.Ch == 'c' {
s.YankColumn()
}
smode = NORMAL_MODE
case PUT_MODE:
if ev.Key == 0 && ev.Ch == 'r' {
s.PutRow()
} else if ev.Key == 0 && ev.Ch == 'c' {
s.PutColumn()
}
smode = NORMAL_MODE
case FORMAT_MODE:
switch ev.Key {
case termbox.KeyEsc, termbox.KeyEnter:
smode = NORMAL_MODE
case termbox.KeyArrowLeft:
s.DecreaseColumnWidth(s.SelectedCell.ColumnHeader())
case termbox.KeyArrowRight:
s.IncreaseColumnWidth(s.SelectedCell.ColumnHeader())
case termbox.KeyArrowDown:
s.DecreaseColumnPrecision(s.SelectedCell.ColumnHeader())
case termbox.KeyArrowUp:
s.IncreaseColumnPrecision(s.SelectedCell.ColumnHeader())
case 0:
switch ev.Ch {
case 'q':
smode = NORMAL_MODE
case '<', 'h':
s.DecreaseColumnWidth(s.SelectedCell.ColumnHeader())
case '>', 'l':
s.IncreaseColumnWidth(s.SelectedCell.ColumnHeader())
case '-', 'j':
s.DecreaseColumnPrecision(s.SelectedCell.ColumnHeader())
case '+', 'k':
s.IncreaseColumnPrecision(s.SelectedCell.ColumnHeader())
}
}
// Once switched out of format mode, clear the format prompt line.
if smode == NORMAL_MODE {
display.DisplayValue("", 1, 0, 80, align.AlignLeft, false)
}
}
}
}