mirror of https://github.com/mum4k/termdash.git
664 lines
16 KiB
Go
664 lines
16 KiB
Go
// Copyright 2018 Google Inc.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package termdash
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"image"
|
|
"sync"
|
|
"testing"
|
|
"time"
|
|
|
|
"github.com/kylelemons/godebug/pretty"
|
|
"github.com/mum4k/termdash/container"
|
|
"github.com/mum4k/termdash/internal/canvas/testcanvas"
|
|
"github.com/mum4k/termdash/internal/event"
|
|
"github.com/mum4k/termdash/internal/event/eventqueue"
|
|
"github.com/mum4k/termdash/internal/event/testevent"
|
|
"github.com/mum4k/termdash/internal/faketerm"
|
|
"github.com/mum4k/termdash/internal/fakewidget"
|
|
"github.com/mum4k/termdash/keyboard"
|
|
"github.com/mum4k/termdash/mouse"
|
|
"github.com/mum4k/termdash/terminal/termbox"
|
|
"github.com/mum4k/termdash/terminal/terminalapi"
|
|
"github.com/mum4k/termdash/widgetapi"
|
|
"github.com/mum4k/termdash/widgets/barchart"
|
|
"github.com/mum4k/termdash/widgets/gauge"
|
|
)
|
|
|
|
// Example shows how to setup and run termdash with periodic redraw.
|
|
func Example() {
|
|
// Create the terminal.
|
|
t, err := termbox.New()
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
defer t.Close()
|
|
|
|
// Create some widgets.
|
|
bc, err := barchart.New()
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
g, err := gauge.New()
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
// Create the container with two widgets.
|
|
c, err := container.New(
|
|
t,
|
|
container.SplitVertical(
|
|
container.Left(
|
|
container.PlaceWidget(bc),
|
|
),
|
|
container.Right(
|
|
container.PlaceWidget(g),
|
|
),
|
|
container.SplitPercent(30),
|
|
),
|
|
)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
// Termdash runs until the context expires.
|
|
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
|
|
defer cancel()
|
|
if err := Run(ctx, t, c); err != nil {
|
|
panic(err)
|
|
}
|
|
}
|
|
|
|
// Example shows how to setup and run termdash with manually triggered redraw.
|
|
func Example_triggered() {
|
|
// Create the terminal.
|
|
t, err := termbox.New()
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
defer t.Close()
|
|
|
|
// Create a widget.
|
|
bc, err := barchart.New()
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
// Create the container with a widget.
|
|
c, err := container.New(
|
|
t,
|
|
container.PlaceWidget(bc),
|
|
)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
// Create the controller and disable periodic redraw.
|
|
ctrl, err := NewController(t, c)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
// Close the controller and termdash once it isn't required anymore.
|
|
defer ctrl.Close()
|
|
|
|
// Redraw the terminal manually.
|
|
if err := ctrl.Redraw(); err != nil {
|
|
panic(err)
|
|
}
|
|
}
|
|
|
|
// errorHandler just stores the last error received.
|
|
type errorHandler struct {
|
|
err error
|
|
mu sync.Mutex
|
|
}
|
|
|
|
func (eh *errorHandler) get() error {
|
|
eh.mu.Lock()
|
|
defer eh.mu.Unlock()
|
|
return eh.err
|
|
}
|
|
|
|
func (eh *errorHandler) handle(err error) {
|
|
eh.mu.Lock()
|
|
defer eh.mu.Unlock()
|
|
eh.err = err
|
|
}
|
|
|
|
// keySubscriber just stores the last pressed key.
|
|
type keySubscriber struct {
|
|
received terminalapi.Keyboard
|
|
mu sync.Mutex
|
|
}
|
|
|
|
func (ks *keySubscriber) get() terminalapi.Keyboard {
|
|
ks.mu.Lock()
|
|
defer ks.mu.Unlock()
|
|
return ks.received
|
|
}
|
|
|
|
func (ks *keySubscriber) receive(k *terminalapi.Keyboard) {
|
|
ks.mu.Lock()
|
|
defer ks.mu.Unlock()
|
|
ks.received = *k
|
|
}
|
|
|
|
// mouseSubscriber just stores the last mouse event.
|
|
type mouseSubscriber struct {
|
|
received terminalapi.Mouse
|
|
mu sync.Mutex
|
|
}
|
|
|
|
func (ms *mouseSubscriber) get() terminalapi.Mouse {
|
|
ms.mu.Lock()
|
|
defer ms.mu.Unlock()
|
|
return ms.received
|
|
}
|
|
|
|
func (ms *mouseSubscriber) receive(m *terminalapi.Mouse) {
|
|
ms.mu.Lock()
|
|
defer ms.mu.Unlock()
|
|
ms.received = *m
|
|
}
|
|
|
|
type eventHandlers struct {
|
|
handler errorHandler
|
|
keySub keySubscriber
|
|
mouseSub mouseSubscriber
|
|
}
|
|
|
|
func TestRun(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
tests := []struct {
|
|
desc string
|
|
size image.Point
|
|
opts func(*eventHandlers) []Option
|
|
events []terminalapi.Event
|
|
// The number of expected processed events, used for synchronization.
|
|
// Equals len(events) * number of subscribers for the event type.
|
|
wantProcessed int
|
|
// function to execute after the test case, can do additional comparison.
|
|
after func(*eventHandlers) error
|
|
want func(size image.Point) *faketerm.Terminal
|
|
wantErr bool
|
|
}{
|
|
{
|
|
desc: "draws the dashboard until closed",
|
|
size: image.Point{60, 10},
|
|
opts: func(*eventHandlers) []Option {
|
|
return []Option{
|
|
RedrawInterval(1),
|
|
}
|
|
},
|
|
want: func(size image.Point) *faketerm.Terminal {
|
|
ft := faketerm.MustNew(size)
|
|
|
|
fakewidget.MustDraw(
|
|
ft,
|
|
testcanvas.MustNew(ft.Area()),
|
|
&widgetapi.Meta{Focused: true},
|
|
widgetapi.Options{},
|
|
)
|
|
return ft
|
|
},
|
|
},
|
|
{
|
|
desc: "fails when the widget doesn't draw due to size too small",
|
|
size: image.Point{1, 1},
|
|
opts: func(*eventHandlers) []Option {
|
|
return []Option{
|
|
RedrawInterval(1),
|
|
}
|
|
},
|
|
want: func(size image.Point) *faketerm.Terminal {
|
|
ft := faketerm.MustNew(size)
|
|
return ft
|
|
},
|
|
wantErr: true,
|
|
},
|
|
{
|
|
desc: "forwards mouse events to container",
|
|
size: image.Point{60, 10},
|
|
opts: func(*eventHandlers) []Option {
|
|
return []Option{
|
|
RedrawInterval(1),
|
|
}
|
|
},
|
|
events: []terminalapi.Event{
|
|
&terminalapi.Mouse{Position: image.Point{0, 0}, Button: mouse.ButtonLeft},
|
|
},
|
|
wantProcessed: 2,
|
|
want: func(size image.Point) *faketerm.Terminal {
|
|
ft := faketerm.MustNew(size)
|
|
|
|
fakewidget.MustDraw(
|
|
ft,
|
|
testcanvas.MustNew(ft.Area()),
|
|
&widgetapi.Meta{Focused: true},
|
|
widgetapi.Options{
|
|
WantMouse: widgetapi.MouseScopeWidget,
|
|
},
|
|
&terminalapi.Mouse{Position: image.Point{0, 0}, Button: mouse.ButtonLeft},
|
|
)
|
|
return ft
|
|
},
|
|
},
|
|
{
|
|
desc: "forwards keyboard events to container",
|
|
size: image.Point{60, 10},
|
|
opts: func(*eventHandlers) []Option {
|
|
return []Option{
|
|
RedrawInterval(1),
|
|
}
|
|
},
|
|
events: []terminalapi.Event{
|
|
&terminalapi.Keyboard{Key: keyboard.KeyEnter},
|
|
},
|
|
wantProcessed: 2,
|
|
want: func(size image.Point) *faketerm.Terminal {
|
|
ft := faketerm.MustNew(size)
|
|
|
|
fakewidget.MustDraw(
|
|
ft,
|
|
testcanvas.MustNew(ft.Area()),
|
|
&widgetapi.Meta{Focused: true},
|
|
widgetapi.Options{
|
|
WantKeyboard: widgetapi.KeyScopeFocused,
|
|
WantMouse: widgetapi.MouseScopeWidget,
|
|
},
|
|
&terminalapi.Keyboard{Key: keyboard.KeyEnter},
|
|
)
|
|
return ft
|
|
},
|
|
},
|
|
{
|
|
desc: "forwards input errors to the error handler",
|
|
size: image.Point{60, 10},
|
|
opts: func(eh *eventHandlers) []Option {
|
|
return []Option{
|
|
RedrawInterval(1),
|
|
ErrorHandler(eh.handler.handle),
|
|
}
|
|
},
|
|
events: []terminalapi.Event{
|
|
terminalapi.NewError("input error"),
|
|
},
|
|
wantProcessed: 1,
|
|
after: func(eh *eventHandlers) error {
|
|
if want := "input error"; eh.handler.get().Error() != want {
|
|
return fmt.Errorf("errorHandler got %v, want %v", eh.handler.get(), want)
|
|
}
|
|
return nil
|
|
},
|
|
want: func(size image.Point) *faketerm.Terminal {
|
|
ft := faketerm.MustNew(size)
|
|
|
|
fakewidget.MustDraw(
|
|
ft,
|
|
testcanvas.MustNew(ft.Area()),
|
|
&widgetapi.Meta{Focused: true},
|
|
widgetapi.Options{},
|
|
)
|
|
return ft
|
|
},
|
|
},
|
|
{
|
|
desc: "forwards keyboard events to the subscriber",
|
|
size: image.Point{60, 10},
|
|
opts: func(eh *eventHandlers) []Option {
|
|
return []Option{
|
|
RedrawInterval(1),
|
|
KeyboardSubscriber(eh.keySub.receive),
|
|
}
|
|
},
|
|
events: []terminalapi.Event{
|
|
&terminalapi.Keyboard{Key: keyboard.KeyF1},
|
|
},
|
|
wantProcessed: 3,
|
|
after: func(eh *eventHandlers) error {
|
|
want := terminalapi.Keyboard{Key: keyboard.KeyF1}
|
|
if diff := pretty.Compare(want, eh.keySub.get()); diff != "" {
|
|
return fmt.Errorf("keySubscriber got unexpected value, diff (-want, +got):\n%s", diff)
|
|
}
|
|
return nil
|
|
},
|
|
want: func(size image.Point) *faketerm.Terminal {
|
|
ft := faketerm.MustNew(size)
|
|
|
|
fakewidget.MustDraw(
|
|
ft,
|
|
testcanvas.MustNew(ft.Area()),
|
|
&widgetapi.Meta{Focused: true},
|
|
widgetapi.Options{
|
|
WantKeyboard: widgetapi.KeyScopeFocused,
|
|
},
|
|
&terminalapi.Keyboard{Key: keyboard.KeyF1},
|
|
)
|
|
return ft
|
|
},
|
|
},
|
|
{
|
|
desc: "forwards mouse events to the subscriber",
|
|
size: image.Point{60, 10},
|
|
opts: func(eh *eventHandlers) []Option {
|
|
return []Option{
|
|
RedrawInterval(1),
|
|
MouseSubscriber(eh.mouseSub.receive),
|
|
}
|
|
},
|
|
events: []terminalapi.Event{
|
|
&terminalapi.Mouse{Position: image.Point{0, 0}, Button: mouse.ButtonWheelUp},
|
|
},
|
|
wantProcessed: 3,
|
|
after: func(eh *eventHandlers) error {
|
|
want := terminalapi.Mouse{Position: image.Point{0, 0}, Button: mouse.ButtonWheelUp}
|
|
if diff := pretty.Compare(want, eh.mouseSub.get()); diff != "" {
|
|
return fmt.Errorf("mouseSubscriber got unexpected value, diff (-want, +got):\n%s", diff)
|
|
}
|
|
return nil
|
|
},
|
|
want: func(size image.Point) *faketerm.Terminal {
|
|
ft := faketerm.MustNew(size)
|
|
|
|
fakewidget.MustDraw(
|
|
ft,
|
|
testcanvas.MustNew(ft.Area()),
|
|
&widgetapi.Meta{Focused: true},
|
|
widgetapi.Options{
|
|
WantMouse: widgetapi.MouseScopeWidget,
|
|
},
|
|
&terminalapi.Mouse{Position: image.Point{0, 0}, Button: mouse.ButtonWheelUp},
|
|
)
|
|
return ft
|
|
},
|
|
},
|
|
}
|
|
|
|
for _, tc := range tests {
|
|
t.Run(tc.desc, func(t *testing.T) {
|
|
tc := tc
|
|
t.Parallel()
|
|
|
|
handlers := &eventHandlers{
|
|
handler: errorHandler{},
|
|
keySub: keySubscriber{},
|
|
mouseSub: mouseSubscriber{},
|
|
}
|
|
|
|
eq := eventqueue.New()
|
|
for _, ev := range tc.events {
|
|
eq.Push(ev)
|
|
}
|
|
|
|
got, err := faketerm.New(tc.size, faketerm.WithEventQueue(eq))
|
|
if err != nil {
|
|
t.Fatalf("faketerm.New => unexpected error: %v", err)
|
|
}
|
|
|
|
cont, err := container.New(
|
|
got,
|
|
container.PlaceWidget(fakewidget.New(widgetapi.Options{
|
|
WantKeyboard: widgetapi.KeyScopeFocused,
|
|
WantMouse: widgetapi.MouseScopeWidget,
|
|
})),
|
|
)
|
|
if err != nil {
|
|
t.Fatalf("container.New => unexpected error: %v", err)
|
|
}
|
|
|
|
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
|
|
|
|
eds := event.NewDistributionSystem()
|
|
opts := tc.opts(handlers)
|
|
opts = append(opts, withEDS(eds))
|
|
err = Run(ctx, got, cont, opts...)
|
|
cancel()
|
|
if (err != nil) != tc.wantErr {
|
|
t.Errorf("Run => unexpected error: %v, wantErr: %v", err, tc.wantErr)
|
|
}
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
if err := testevent.WaitFor(5*time.Second, func() error {
|
|
if got, want := eds.Processed(), tc.wantProcessed; got != want {
|
|
return fmt.Errorf("the event distribution system processed %d events, want %d", got, want)
|
|
}
|
|
return nil
|
|
}); err != nil {
|
|
t.Fatalf("testevent.WaitFor => %v", err)
|
|
}
|
|
|
|
if tc.after != nil {
|
|
if err := tc.after(handlers); err != nil {
|
|
t.Errorf("after => unexpected error: %v", err)
|
|
}
|
|
}
|
|
|
|
if diff := faketerm.Diff(tc.want(got.Size()), got); diff != "" {
|
|
t.Errorf("Run => %v", diff)
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestController(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
tests := []struct {
|
|
desc string
|
|
size image.Point
|
|
opts []Option
|
|
events []terminalapi.Event
|
|
// The number of expected processed events, used for synchronization.
|
|
// Equals len(events) * number of subscribers for the event type.
|
|
wantProcessed int
|
|
apiEvents func(*fakewidget.Mirror) // Calls to the API of the widget.
|
|
controls func(*Controller) error
|
|
want func(size image.Point) *faketerm.Terminal
|
|
wantErr bool
|
|
}{
|
|
{
|
|
desc: "event triggers a redraw",
|
|
size: image.Point{60, 10},
|
|
events: []terminalapi.Event{
|
|
&terminalapi.Keyboard{Key: keyboard.KeyEnter},
|
|
},
|
|
wantProcessed: 2,
|
|
want: func(size image.Point) *faketerm.Terminal {
|
|
ft := faketerm.MustNew(size)
|
|
|
|
fakewidget.MustDraw(
|
|
ft,
|
|
testcanvas.MustNew(ft.Area()),
|
|
&widgetapi.Meta{Focused: true},
|
|
widgetapi.Options{
|
|
WantKeyboard: widgetapi.KeyScopeFocused,
|
|
WantMouse: widgetapi.MouseScopeWidget,
|
|
},
|
|
&terminalapi.Keyboard{Key: keyboard.KeyEnter},
|
|
)
|
|
return ft
|
|
|
|
},
|
|
},
|
|
{
|
|
desc: "controller triggers redraw",
|
|
size: image.Point{60, 10},
|
|
apiEvents: func(mi *fakewidget.Mirror) {
|
|
mi.Text("hello")
|
|
},
|
|
controls: func(ctrl *Controller) error {
|
|
return ctrl.Redraw()
|
|
},
|
|
want: func(size image.Point) *faketerm.Terminal {
|
|
ft := faketerm.MustNew(size)
|
|
|
|
mirror := fakewidget.New(widgetapi.Options{})
|
|
mirror.Text("hello")
|
|
fakewidget.MustDrawWithMirror(
|
|
mirror,
|
|
ft,
|
|
testcanvas.MustNew(ft.Area()),
|
|
&widgetapi.Meta{Focused: true},
|
|
)
|
|
return ft
|
|
},
|
|
},
|
|
{
|
|
desc: "ignores periodic redraw via the controller",
|
|
size: image.Point{60, 10},
|
|
opts: []Option{
|
|
RedrawInterval(1),
|
|
},
|
|
apiEvents: func(mi *fakewidget.Mirror) {
|
|
mi.Text("hello")
|
|
},
|
|
controls: func(ctrl *Controller) error {
|
|
return nil
|
|
},
|
|
want: func(size image.Point) *faketerm.Terminal {
|
|
ft := faketerm.MustNew(size)
|
|
|
|
fakewidget.MustDraw(
|
|
ft,
|
|
testcanvas.MustNew(ft.Area()),
|
|
&widgetapi.Meta{Focused: true},
|
|
widgetapi.Options{},
|
|
)
|
|
return ft
|
|
},
|
|
},
|
|
{
|
|
desc: "does not redraw unless triggered when periodic disabled",
|
|
size: image.Point{60, 10},
|
|
apiEvents: func(mi *fakewidget.Mirror) {
|
|
mi.Text("hello")
|
|
},
|
|
controls: func(ctrl *Controller) error {
|
|
return nil
|
|
},
|
|
want: func(size image.Point) *faketerm.Terminal {
|
|
ft := faketerm.MustNew(size)
|
|
|
|
fakewidget.MustDraw(
|
|
ft,
|
|
testcanvas.MustNew(ft.Area()),
|
|
&widgetapi.Meta{Focused: true},
|
|
widgetapi.Options{},
|
|
)
|
|
return ft
|
|
},
|
|
},
|
|
{
|
|
desc: "fails when redraw fails",
|
|
size: image.Point{1, 1},
|
|
want: func(size image.Point) *faketerm.Terminal {
|
|
return faketerm.MustNew(size)
|
|
},
|
|
wantErr: true,
|
|
},
|
|
{
|
|
desc: "resizes the terminal",
|
|
size: image.Point{60, 10},
|
|
events: []terminalapi.Event{
|
|
&terminalapi.Resize{Size: image.Point{70, 10}},
|
|
},
|
|
wantProcessed: 1,
|
|
controls: func(ctrl *Controller) error {
|
|
return ctrl.Redraw()
|
|
},
|
|
want: func(size image.Point) *faketerm.Terminal {
|
|
ft := faketerm.MustNew(image.Point{70, 10})
|
|
|
|
fakewidget.MustDraw(
|
|
ft,
|
|
testcanvas.MustNew(ft.Area()),
|
|
&widgetapi.Meta{Focused: true},
|
|
widgetapi.Options{},
|
|
)
|
|
return ft
|
|
},
|
|
},
|
|
}
|
|
|
|
for _, tc := range tests {
|
|
t.Run(tc.desc, func(t *testing.T) {
|
|
tc := tc
|
|
t.Parallel()
|
|
|
|
eq := eventqueue.New()
|
|
for _, ev := range tc.events {
|
|
eq.Push(ev)
|
|
}
|
|
|
|
got, err := faketerm.New(tc.size, faketerm.WithEventQueue(eq))
|
|
if err != nil {
|
|
t.Fatalf("faketerm.New => unexpected error: %v", err)
|
|
}
|
|
|
|
mi := fakewidget.New(widgetapi.Options{
|
|
WantKeyboard: widgetapi.KeyScopeFocused,
|
|
WantMouse: widgetapi.MouseScopeWidget,
|
|
})
|
|
cont, err := container.New(
|
|
got,
|
|
container.PlaceWidget(mi),
|
|
)
|
|
if err != nil {
|
|
t.Fatalf("container.New => unexpected error: %v", err)
|
|
}
|
|
|
|
eds := event.NewDistributionSystem()
|
|
opts := tc.opts
|
|
opts = append(opts, withEDS(eds))
|
|
ctrl, err := NewController(got, cont, opts...)
|
|
if (err != nil) != tc.wantErr {
|
|
t.Errorf("NewController => unexpected error: %v, wantErr: %v", err, tc.wantErr)
|
|
}
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
if tc.apiEvents != nil {
|
|
tc.apiEvents(mi)
|
|
}
|
|
|
|
if err := testevent.WaitFor(5*time.Second, func() error {
|
|
if got, want := eds.Processed(), tc.wantProcessed; got != want {
|
|
return fmt.Errorf("the event distribution system processed %d events, want %d", got, want)
|
|
}
|
|
return nil
|
|
}); err != nil {
|
|
t.Fatalf("testevent.WaitFor => %v", err)
|
|
}
|
|
|
|
if tc.controls != nil {
|
|
if err := tc.controls(ctrl); err != nil {
|
|
t.Errorf("controls => unexpected error: %v", err)
|
|
}
|
|
}
|
|
ctrl.Close()
|
|
|
|
if diff := faketerm.Diff(tc.want(got.Size()), got); diff != "" {
|
|
t.Errorf("Run => %v", diff)
|
|
}
|
|
})
|
|
}
|
|
}
|