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package main
import (
"fmt"
"sync"
log "github.com/Sirupsen/logrus"
)
type outputLineType int
const (
oltNormal outputLineType = iota
oltCommand
oltError
oltSuccess
)
var outputLineThemeComponentIDs = map[outputLineType]ThemeComponentID{
oltNormal: CmpCommandOutputNormal,
oltCommand: CmpCommandOutputCommand,
oltError: CmpCommandOutputError,
oltSuccess: CmpCommandOutputSuccess,
}
type outputLine struct {
line string
lineType outputLineType
}
// CommandOutputProcessor receives the output and status of a command
type CommandOutputProcessor interface {
AddOutputLine(line string)
OnCommandExecutionError(err error)
OnCommandComplete(exitCode int)
}
// CommandOutputView is a view for displaying command output
type CommandOutputView struct {
*AbstractWindowView
activeViewPos ViewPos
lastViewDimension ViewDimension
outputLines []outputLine
lock sync.Mutex
}
// NewCommandOutputView creates a new instance
func NewCommandOutputView(command string, channels Channels, config Config, variables GRVVariableSetter) *CommandOutputView {
commandOutputView := &CommandOutputView{
activeViewPos: NewViewPosition(),
}
commandOutputView.AbstractWindowView = NewAbstractWindowView(commandOutputView, channels, config, variables, &commandOutputView.lock, "output line")
commandOutputView.addOutputLine(outputLine{
line: fmt.Sprintf("$ %v", command),
lineType: oltCommand,
})
return commandOutputView
}
// ViewID returns the ViewID of the command output view
func (commandOutputView *CommandOutputView) ViewID() ViewID {
return ViewCommandOutput
}
// Render generates the comamnd output view and writes it to the provided window
func (commandOutputView *CommandOutputView) Render(win RenderWindow) (err error) {
commandOutputView.lock.Lock()
defer commandOutputView.lock.Unlock()
commandOutputView.lastViewDimension = win.ViewDimensions()
winRows := win.Rows() - 2
viewPos := commandOutputView.viewPos()
viewRows := commandOutputView.rows()
viewPos.DetermineViewStartRow(winRows, viewRows)
viewRowIndex := viewPos.ViewStartRowIndex()
startColumn := viewPos.ViewStartColumn()
win.ApplyStyle(CmpCommandOutputNormal)
for rowIndex := uint(0); rowIndex < winRows && viewRowIndex < viewRows; rowIndex++ {
outputLine := commandOutputView.outputLines[viewRowIndex]
themeComponentID := outputLineThemeComponentIDs[outputLine.lineType]
if err = win.SetRow(rowIndex+1, startColumn, themeComponentID, " %v", outputLine.line); err != nil {
return
}
viewRowIndex++
}
if err = win.SetSelectedRow(viewPos.SelectedRowIndex()+1, ViewStateActive); err != nil {
return
}
win.DrawBorderWithStyle(CmpCommandOutputNormal)
if err = win.SetTitle(CmpCommandOutputTitle, "Command Output"); err != nil {
return
}
if err = win.SetFooter(CmpCommandOutputFooter, "Line %v of %v", viewPos.SelectedRowIndex()+1, viewRows); err != nil {
return
}
return
}
// RenderHelpBar renders a help message for the command output view
func (commandOutputView *CommandOutputView) RenderHelpBar(lineBuilder *LineBuilder) (err error) {
quitKeys := commandOutputView.config.KeyStrings(ActionRemoveView, ViewHierarchy{ViewCommandOutput, ViewAll})
if len(quitKeys) > 0 {
quitKeyText := fmt.Sprintf("Press %v to close command output", quitKeys[len(quitKeys)-1].keystring)
lineBuilder.AppendWithStyle(CmpHelpbarviewSpecial, " %v", quitKeyText)
}
return
}
// AddOutputLine receives a line of command output
func (commandOutputView *CommandOutputView) AddOutputLine(line string) {
commandOutputView.lock.Lock()
defer commandOutputView.lock.Unlock()
commandOutputView.addOutputLine(outputLine{
line: line,
lineType: oltNormal,
})
}
// OnCommandExecutionError is called when command execution has failed
func (commandOutputView *CommandOutputView) OnCommandExecutionError(err error) {
commandOutputView.lock.Lock()
defer commandOutputView.lock.Unlock()
commandOutputView.addOutputLine(
outputLine{
line: "",
lineType: oltNormal,
},
outputLine{
line: fmt.Sprintf("Command execution failed: %v", err),
lineType: oltError,
},
)
}
// OnCommandComplete is called when a command has completed and it's exit status is available
func (commandOutputView *CommandOutputView) OnCommandComplete(exitCode int) {
commandOutputView.lock.Lock()
defer commandOutputView.lock.Unlock()
var lineType outputLineType
if exitCode == 0 {
lineType = oltSuccess
} else {
lineType = oltError
}
commandOutputView.addOutputLine(
outputLine{
line: "",
lineType: oltNormal,
},
outputLine{
line: fmt.Sprintf("Command exited with status %v", exitCode),
lineType: lineType,
},
)
}
func (commandOutputView *CommandOutputView) addOutputLine(outputLines ...outputLine) {
commandOutputView.outputLines = append(commandOutputView.outputLines, outputLines...)
commandOutputView.activeViewPos.SetActiveRowIndex(commandOutputView.rows() - 1)
commandOutputView.channels.UpdateDisplay()
}
func (commandOutputView *CommandOutputView) viewPos() ViewPos {
return commandOutputView.activeViewPos
}
func (commandOutputView *CommandOutputView) rows() uint {
return uint(len(commandOutputView.outputLines))
}
func (commandOutputView *CommandOutputView) viewDimension() ViewDimension {
return commandOutputView.lastViewDimension
}
func (commandOutputView *CommandOutputView) onRowSelected(rowIndex uint) (err error) {
return
}
func (commandOutputView *CommandOutputView) line(lineIndex uint) (line string) {
if lineIndex < commandOutputView.rows() {
line = commandOutputView.outputLines[lineIndex].line
}
return
}
// HandleAction handles the action if supported
func (commandOutputView *CommandOutputView) HandleAction(action Action) (err error) {
commandOutputView.lock.Lock()
defer commandOutputView.lock.Unlock()
var handled bool
if handled, err = commandOutputView.AbstractWindowView.HandleAction(action); handled {
log.Debugf("Action handled by AbstractWindowView")
} else {
log.Debugf("Action not handled")
}
return
}
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