use standard errors when defining package level errors and wrap when percolating up

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