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package main
import (
"fmt"
"sort"
"strconv"
"strings"
"time"
"github.com/antonmedv/expr/checker"
"github.com/antonmedv/expr/compiler"
"github.com/antonmedv/expr/optimizer"
"github.com/antonmedv/expr/parser"
. "github.com/antonmedv/expr/vm"
"github.com/gdamore/tcell"
"github.com/rivo/tview"
"github.com/sanity-io/litter"
)
func debugger() {
tree, err := parser.Parse(input())
check(err)
_, err = checker.Check(tree, nil)
check(err)
if opt {
err = optimizer.Optimize(&tree.Node, nil)
check(err)
}
program, err := compiler.Compile(tree, nil)
check(err)
vm := Debug()
app := tview.NewApplication()
table := tview.NewTable()
stack := tview.NewTable()
stack.
SetBorder(true).
SetTitle("Stack")
scope := tview.NewTable()
scope.
SetBorder(true).
SetTitle("Scope")
sub := tview.NewFlex().
SetDirection(tview.FlexRow).
AddItem(stack, 0, 3, false).
AddItem(scope, 0, 1, false)
flex := tview.NewFlex().
AddItem(table, 0, 1, true).
AddItem(sub, 0, 1, false)
app.SetRoot(flex, true)
go func() {
out, _ := vm.Run(program, nil)
app.QueueUpdateDraw(func() {
sub.RemoveItem(scope)
result := tview.NewTextView()
result.
SetBorder(true).
SetTitle("Output")
result.SetText(litter.Sdump(out))
sub.AddItem(result, 0, 1, false)
})
}()
index := make(map[int]int)
for row, line := range strings.Split(program.Disassemble(), "\n") {
if line == "" {
continue
}
parts := strings.Split(line, "\t")
ip, err := strconv.Atoi(parts[0])
check(err)
index[ip] = row
table.SetCellSimple(row, 0, fmt.Sprintf("% *d", 5, ip))
for col := 1; col < len(parts); col++ {
table.SetCellSimple(row, col, parts[col])
}
for col := len(parts); col < 4; col++ {
table.SetCellSimple(row, col, "")
}
table.SetCell(row, 4, tview.NewTableCell("").SetExpansion(1))
}
draw := func(ip int) {
app.QueueUpdateDraw(func() {
for row := 0; row < table.GetRowCount(); row++ {
for col := 0; col < table.GetColumnCount(); col++ {
table.GetCell(row, col).SetBackgroundColor(tcell.ColorDefault)
}
}
if row, ok := index[ip]; ok {
table.Select(row, 0)
for col := 0; col < 5; col++ {
table.GetCell(row, col).SetBackgroundColor(tcell.ColorMediumBlue)
}
table.SetOffset(row-10, 0)
opcode := table.GetCell(row, 1).Text
if strings.HasPrefix(opcode, "OpJump") {
jump := table.GetCell(row, 3).Text
jump = strings.Trim(jump, "()")
ip, err := strconv.Atoi(jump)
if err == nil {
if row, ok := index[ip]; ok {
for col := 0; col < 5; col++ {
table.GetCell(row, col).SetBackgroundColor(tcell.ColorDimGrey)
}
}
}
}
}
stack.Clear()
for i, value := range vm.Stack() {
stack.SetCellSimple(i, 0, fmt.Sprintf("% *d: ", 2, i))
stack.SetCellSimple(i, 1, fmt.Sprintf("%+v", value))
}
stack.ScrollToEnd()
scope.Clear()
var keys []string
for k := range vm.Scope() {
keys = append(keys, k)
}
sort.Strings(keys)
row := 0
for _, name := range keys {
scope.SetCellSimple(row, 0, fmt.Sprintf("%v: ", name))
scope.SetCellSimple(row, 1, fmt.Sprintf("%v", vm.Scope()[name]))
row++
}
})
}
getSelectedPosition := func() int {
row, _ := table.GetSelection()
ip, err := strconv.Atoi(strings.TrimSpace(table.GetCell(row, 0).Text))
check(err)
return ip
}
autostep := false
var breakpoint int
go func() {
draw(0)
for ip := range vm.Position() {
draw(ip)
if autostep {
if breakpoint != ip {
time.Sleep(20 * time.Millisecond)
vm.Step()
} else {
autostep = false
}
}
}
}()
app.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
if event.Key() == tcell.KeyDown || event.Key() == tcell.KeyUp {
table.SetSelectable(true, false)
}
if event.Key() == tcell.KeyEnter {
selectable, _ := table.GetSelectable()
if selectable {
table.SetSelectable(false, false)
breakpoint = getSelectedPosition()
autostep = true
}
vm.Step()
}
return event
})
err = app.Run()
check(err)
}
|
