bump gocui to support loader animations on views

2 files changed, 68 insertions, 12 deletions

diff --git a/vendor/github.com/jesseduffield/gocui/gui.go b/vendor/github.com/jesseduffield/gocui/gui.go
index a50d0c522..41599a9be 100644
--- a/vendor/github.com/jesseduffield/gocui/gui.go
+++ b/vendor/github.com/jesseduffield/gocui/gui.go
@@ -5,6 +5,9 @@
 package gocui
 
 import (
+	standardErrors "errors"
+	"time"
+
 	"github.com/go-errors/errors"
 
 	"github.com/jesseduffield/termbox-go"
@@ -12,10 +15,10 @@ import (
 
 var (
 	// ErrQuit is used to decide if the MainLoop finished successfully.
-	ErrQuit = errors.New("quit")
+	ErrQuit = standardErrors.New("quit")
 
 	// ErrUnknownView allows to assert if a View must be initialized.
-	ErrUnknownView = errors.New("unknown view")
+	ErrUnknownView = standardErrors.New("unknown view")
 )
 
 // OutputMode represents the terminal's output mode (8 or 256 colors).
@@ -163,7 +166,7 @@ func (g *Gui) SetView(name string, x0, y0, x1, y1 int, overlaps byte) (*View, er
 	v.SelBgColor, v.SelFgColor = g.SelBgColor, g.SelFgColor
 	v.Overlaps = overlaps
 	g.views = append(g.views, v)
-	return v, ErrUnknownView
+	return v, errors.Wrap(ErrUnknownView, 0)
 }
 
 // SetViewOnTop sets the given view on top of the existing ones.
@@ -175,7 +178,7 @@ func (g *Gui) SetViewOnTop(name string) (*View, error) {
 			return v, nil
 		}
 	}
-	return nil, ErrUnknownView
+	return nil, errors.Wrap(ErrUnknownView, 0)
 }
 
 // SetViewOnBottom sets the given view on bottom of the existing ones.
@@ -187,7 +190,7 @@ func (g *Gui) SetViewOnBottom(name string) (*View, error) {
 			return v, nil
 		}
 	}
-	return nil, ErrUnknownView
+	return nil, errors.Wrap(ErrUnknownView, 0)
 }
 
 // Views returns all the views in the GUI.
@@ -203,7 +206,7 @@ func (g *Gui) View(name string) (*View, error) {
 			return v, nil
 		}
 	}
-	return nil, ErrUnknownView
+	return nil, errors.Wrap(ErrUnknownView, 0)
 }
 
 // ViewByPosition returns a pointer to a view matching the given position, or
@@ -216,7 +219,7 @@ func (g *Gui) ViewByPosition(x, y int) (*View, error) {
 			return v, nil
 		}
 	}
-	return nil, ErrUnknownView
+	return nil, errors.Wrap(ErrUnknownView, 0)
 }
 
 // ViewPosition returns the coordinates of the view with the given name, or
@@ -227,7 +230,7 @@ func (g *Gui) ViewPosition(name string) (x0, y0, x1, y1 int, err error) {
 			return v.x0, v.y0, v.x1, v.y1, nil
 		}
 	}
-	return 0, 0, 0, 0, ErrUnknownView
+	return 0, 0, 0, 0, errors.Wrap(ErrUnknownView, 0)
 }
 
 // DeleteView deletes a view by name.
@@ -238,7 +241,7 @@ func (g *Gui) DeleteView(name string) error {
 			return nil
 		}
 	}
-	return ErrUnknownView
+	return errors.Wrap(ErrUnknownView, 0)
 }
 
 // SetCurrentView gives the focus to a given view.
@@ -249,7 +252,7 @@ func (g *Gui) SetCurrentView(name string) (*View, error) {
 			return v, nil
 		}
 	}
-	return nil, ErrUnknownView
+	return nil, errors.Wrap(ErrUnknownView, 0)
 }
 
 // CurrentView returns the currently focused view, or nil if no view
@@ -364,6 +367,7 @@ func (g *Gui) SetManagerFunc(manager func(*Gui) error) {
 // MainLoop runs the main loop until an error is returned. A successful
 // finish should return ErrQuit.
 func (g *Gui) MainLoop() error {
+	g.loaderTick()
 	if err := g.flush(); err != nil {
 		return err
 	}
@@ -705,3 +709,16 @@ func (g *Gui) execKeybinding(v *View, kb *keybinding) (bool, error) {
 	}
 	return true, nil
 }
+
+func (g *Gui) loaderTick() {
+	go func() {
+		for range time.Tick(time.Millisecond) {
+			for _, view := range g.Views() {
+				if view.HasLoader {
+					g.userEvents <- userEvent{func(g *Gui) error { return nil }}
+					break
+				}
+			}
+		}
+	}()
+}
diff --git a/vendor/github.com/jesseduffield/gocui/view.go b/vendor/github.com/jesseduffield/gocui/view.go
index f691960b4..7cf632c84 100644
--- a/vendor/github.com/jesseduffield/gocui/view.go
+++ b/vendor/github.com/jesseduffield/gocui/view.go
@@ -8,6 +8,7 @@ import (
 	"bytes"
 	"io"
 	"strings"
+	"time"
 
 	"github.com/go-errors/errors"
 
@@ -87,6 +88,9 @@ type View struct {
 
 	// Overlaps describes which edges are overlapping with another view's edges
 	Overlaps byte
+
+	// If HasLoader is true, the message will be appended with a spinning loader animation
+	HasLoader bool
 }
 
 type viewLine struct {
@@ -322,7 +326,11 @@ func (v *View) draw() error {
 	}
 	if v.tainted {
 		v.viewLines = nil
-		for i, line := range v.lines {
+		lines := v.lines
+		if v.HasLoader {
+			lines = v.loaderLines()
+		}
+		for i, line := range lines {
 			wrap := 0
 			if v.Wrap {
 				wrap = maxX
@@ -334,7 +342,9 @@ func (v *View) draw() error {
 				v.viewLines = append(v.viewLines, vline)
 			}
 		}
-		v.tainted = false
+		if !v.HasLoader {
+			v.tainted = false
+		}
 	}
 
 	if v.Autoscroll && len(v.viewLines) > maxY {
@@ -564,3 +574,32 @@ func linesToString(lines [][]cell) string {
 
 	return strings.Join(str, "\n")
 }
+
+func (v *View) loaderLines() [][]cell {
+	duplicate := make([][]cell, len(v.lines))
+	for i := range v.lines {
+		if i < len(v.lines)-1 {
+			duplicate[i] = make([]cell, len(v.lines[i]))
+			copy(duplicate[i], v.lines[i])
+		} else {
+			duplicate[i] = make([]cell, len(v.lines[i])+2)
+			copy(duplicate[i], v.lines[i])
+			duplicate[i][len(duplicate[i])-2] = cell{chr: ' '}
+			duplicate[i][len(duplicate[i])-1] = Loader()
+		}
+	}
+
+	return duplicate
+}
+
+func Loader() cell {
+	characters := "|/-\\"
+	now := time.Now()
+	nanos := now.UnixNano()
+	index := nanos / 50000000 % int64(len(characters))
+	str := characters[index : index+1]
+	chr := []rune(str)[0]
+	return cell{
+		chr: chr,
+	}
+}