336 lines
7.3 KiB
Go
336 lines
7.3 KiB
Go
package widgets
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import (
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"fmt"
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"log"
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"os/exec"
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"sort"
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"strconv"
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"strings"
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"time"
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psCPU "github.com/shirou/gopsutil/cpu"
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tui "github.com/gizak/termui/v3"
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ui "github.com/xxxserxxx/gotop/termui"
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"github.com/xxxserxxx/gotop/utils"
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)
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const (
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UP_ARROW = "▲"
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DOWN_ARROW = "▼"
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)
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type ProcSortMethod string
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const (
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ProcSortCpu ProcSortMethod = "c"
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ProcSortMem = "m"
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ProcSortPid = "p"
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)
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type Proc struct {
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Pid int
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CommandName string
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FullCommand string
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Cpu float64
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Mem float64
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}
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type ProcWidget struct {
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*ui.Table
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entry *ui.Entry
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cpuCount int
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updateInterval time.Duration
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sortMethod ProcSortMethod
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filter string
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groupedProcs []Proc
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ungroupedProcs []Proc
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showGroupedProcs bool
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}
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func NewProcWidget() *ProcWidget {
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cpuCount, err := psCPU.Counts(false)
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if err != nil {
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log.Printf("failed to get CPU count from gopsutil: %v", err)
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}
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self := &ProcWidget{
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Table: ui.NewTable(),
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updateInterval: time.Second,
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cpuCount: cpuCount,
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sortMethod: ProcSortCpu,
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showGroupedProcs: true,
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filter: "",
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}
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self.entry = &ui.Entry{
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Style: self.TitleStyle,
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Label: " Filter: ",
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Value: "",
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UpdateCallback: func(val string) {
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self.filter = val
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self.update()
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},
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}
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self.Title = " Processes "
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self.ShowCursor = true
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self.ShowLocation = true
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self.ColGap = 3
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self.PadLeft = 2
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self.ColResizer = func() {
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self.ColWidths = []int{
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5, utils.MaxInt(self.Inner.Dx()-26, 10), 4, 4,
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}
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}
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self.UniqueCol = 0
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if self.showGroupedProcs {
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self.UniqueCol = 1
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}
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self.update()
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go func() {
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for range time.NewTicker(self.updateInterval).C {
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self.Lock()
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self.update()
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self.Unlock()
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}
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}()
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return self
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}
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func (p *ProcWidget) EnableMetric() {
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// There's (currently) no metric for this
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}
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func (self *ProcWidget) SetEditingFilter(editing bool) {
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self.entry.SetEditing(editing)
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}
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func (self *ProcWidget) HandleEvent(e tui.Event) bool {
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return self.entry.HandleEvent(e)
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}
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func (self *ProcWidget) SetRect(x1, y1, x2, y2 int) {
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self.Table.SetRect(x1, y1, x2, y2)
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self.entry.SetRect(x1+2, y2-1, x2-2, y2)
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}
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func (self *ProcWidget) Draw(buf *tui.Buffer) {
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self.Table.Draw(buf)
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self.entry.Draw(buf)
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}
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func (self *ProcWidget) filterProcs(procs []Proc) []Proc {
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if self.filter == "" {
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return procs
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}
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var filtered []Proc
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for _, proc := range procs {
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if strings.Contains(proc.FullCommand, self.filter) || strings.Contains(fmt.Sprintf("%d", proc.Pid), self.filter) {
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filtered = append(filtered, proc)
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}
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}
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return filtered
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}
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func (self *ProcWidget) update() {
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procs, err := getProcs()
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if err != nil {
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log.Printf("failed to retrieve processes: %v", err)
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return
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}
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// have to iterate over the entry number in order to modify the array in place
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for i := range procs {
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procs[i].Cpu /= float64(self.cpuCount)
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}
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procs = self.filterProcs(procs)
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self.ungroupedProcs = procs
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self.groupedProcs = groupProcs(procs)
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self.sortProcs()
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self.convertProcsToTableRows()
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}
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// sortProcs sorts either the grouped or ungrouped []Process based on the sortMethod.
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// Called with every update, when the sort method is changed, and when processes are grouped and ungrouped.
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func (self *ProcWidget) sortProcs() {
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self.Header = []string{"Count", "Command", "CPU%", "Mem%"}
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if !self.showGroupedProcs {
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self.Header[0] = "PID"
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}
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var procs *[]Proc
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if self.showGroupedProcs {
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procs = &self.groupedProcs
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} else {
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procs = &self.ungroupedProcs
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}
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switch self.sortMethod {
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case ProcSortCpu:
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sort.Sort(sort.Reverse(SortProcsByCpu(*procs)))
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self.Header[2] += DOWN_ARROW
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case ProcSortPid:
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if self.showGroupedProcs {
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sort.Sort(sort.Reverse(SortProcsByPid(*procs)))
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} else {
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sort.Sort(SortProcsByPid(*procs))
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}
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self.Header[0] += DOWN_ARROW
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case ProcSortMem:
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sort.Sort(sort.Reverse(SortProcsByMem(*procs)))
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self.Header[3] += DOWN_ARROW
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}
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}
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// convertProcsToTableRows converts a []Proc to a [][]string and sets it to the table Rows
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func (self *ProcWidget) convertProcsToTableRows() {
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var procs *[]Proc
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if self.showGroupedProcs {
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procs = &self.groupedProcs
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} else {
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procs = &self.ungroupedProcs
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}
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strings := make([][]string, len(*procs))
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for i := range *procs {
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strings[i] = make([]string, 4)
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strings[i][0] = strconv.Itoa(int((*procs)[i].Pid))
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if self.showGroupedProcs {
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strings[i][1] = (*procs)[i].CommandName
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} else {
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strings[i][1] = (*procs)[i].FullCommand
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}
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strings[i][2] = fmt.Sprintf("%4s", strconv.FormatFloat((*procs)[i].Cpu, 'f', 1, 64))
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strings[i][3] = fmt.Sprintf("%4s", strconv.FormatFloat(float64((*procs)[i].Mem), 'f', 1, 64))
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}
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self.Rows = strings
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}
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func (self *ProcWidget) ChangeProcSortMethod(method ProcSortMethod) {
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if self.sortMethod != method {
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self.sortMethod = method
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self.ScrollTop()
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self.sortProcs()
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self.convertProcsToTableRows()
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}
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}
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func (self *ProcWidget) ToggleShowingGroupedProcs() {
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self.showGroupedProcs = !self.showGroupedProcs
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if self.showGroupedProcs {
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self.UniqueCol = 1
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} else {
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self.UniqueCol = 0
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}
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self.ScrollTop()
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self.sortProcs()
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self.convertProcsToTableRows()
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}
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// KillProc kills a process or group of processes depending on if we're
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// displaying the processes grouped or not.
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func (self *ProcWidget) KillProc(sigName string) {
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self.SelectedItem = ""
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command := "kill"
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if self.UniqueCol == 1 {
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command = "pkill"
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}
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cmd := exec.Command(command, "--signal", sigName, self.Rows[self.SelectedRow][self.UniqueCol])
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cmd.Start()
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cmd.Wait()
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}
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// groupProcs groupes a []Proc based on command name.
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// The first field changes from PID to count.
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// Cpu and Mem are added together for each Proc.
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func groupProcs(procs []Proc) []Proc {
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groupedProcsMap := make(map[string]Proc)
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for _, proc := range procs {
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val, ok := groupedProcsMap[proc.CommandName]
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if ok {
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groupedProcsMap[proc.CommandName] = Proc{
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val.Pid + 1,
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val.CommandName,
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"",
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val.Cpu + proc.Cpu,
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val.Mem + proc.Mem,
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}
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} else {
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groupedProcsMap[proc.CommandName] = Proc{
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1,
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proc.CommandName,
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"",
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proc.Cpu,
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proc.Mem,
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}
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}
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}
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groupedProcsList := make([]Proc, len(groupedProcsMap))
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i := 0
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for _, val := range groupedProcsMap {
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groupedProcsList[i] = val
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i++
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}
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return groupedProcsList
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}
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// []Proc Sorting //////////////////////////////////////////////////////////////
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type SortProcsByCpu []Proc
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// Len implements Sort interface
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func (self SortProcsByCpu) Len() int {
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return len(self)
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}
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// Swap implements Sort interface
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func (self SortProcsByCpu) Swap(i, j int) {
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self[i], self[j] = self[j], self[i]
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}
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// Less implements Sort interface
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func (self SortProcsByCpu) Less(i, j int) bool {
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return self[i].Cpu < self[j].Cpu
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}
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type SortProcsByPid []Proc
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// Len implements Sort interface
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func (self SortProcsByPid) Len() int {
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return len(self)
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}
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// Swap implements Sort interface
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func (self SortProcsByPid) Swap(i, j int) {
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self[i], self[j] = self[j], self[i]
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}
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// Less implements Sort interface
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func (self SortProcsByPid) Less(i, j int) bool {
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return self[i].Pid < self[j].Pid
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}
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type SortProcsByMem []Proc
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// Len implements Sort interface
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func (self SortProcsByMem) Len() int {
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return len(self)
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}
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// Swap implements Sort interface
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func (self SortProcsByMem) Swap(i, j int) {
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self[i], self[j] = self[j], self[i]
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}
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// Less implements Sort interface
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func (self SortProcsByMem) Less(i, j int) bool {
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return self[i].Mem < self[j].Mem
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}
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