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authorValentin Rothberg <rothberg@redhat.com>2020-10-07 16:58:53 +0200
committerValentin Rothberg <rothberg@redhat.com>2020-11-13 15:40:06 +0100
commit8e4a42aa429c6dec0d5face7c69554d8a0677e96 (patch)
treebbfff77e7b32a8b46af6f57d42965a7751bec18e /vendor/github.com/juju/ansiterm/context.go
parent0b1a60ec27928a40ac827148c1517098612616bd (diff)
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short-name aliasing
Add support for short-name aliasing. Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
Diffstat (limited to 'vendor/github.com/juju/ansiterm/context.go')
-rw-r--r--vendor/github.com/juju/ansiterm/context.go95
1 files changed, 95 insertions, 0 deletions
diff --git a/vendor/github.com/juju/ansiterm/context.go b/vendor/github.com/juju/ansiterm/context.go
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+++ b/vendor/github.com/juju/ansiterm/context.go
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+// Copyright 2016 Canonical Ltd.
+// Licensed under the LGPLv3, see LICENCE file for details.
+
+package ansiterm
+
+import (
+ "fmt"
+ "io"
+)
+
+// Context provides a way to specify both foreground and background colors
+// along with other styles and write text to a Writer with those colors and
+// styles.
+type Context struct {
+ Foreground Color
+ Background Color
+ Styles []Style
+}
+
+// Foreground is a convenience function that creates a Context with the
+// specified color as the foreground color.
+func Foreground(color Color) *Context {
+ return &Context{Foreground: color}
+}
+
+// Background is a convenience function that creates a Context with the
+// specified color as the background color.
+func Background(color Color) *Context {
+ return &Context{Background: color}
+}
+
+// Styles is a convenience function that creates a Context with the
+// specified styles set.
+func Styles(styles ...Style) *Context {
+ return &Context{Styles: styles}
+}
+
+// SetForeground sets the foreground to the specified color.
+func (c *Context) SetForeground(color Color) *Context {
+ c.Foreground = color
+ return c
+}
+
+// SetBackground sets the background to the specified color.
+func (c *Context) SetBackground(color Color) *Context {
+ c.Background = color
+ return c
+}
+
+// SetStyle replaces the styles with the new values.
+func (c *Context) SetStyle(styles ...Style) *Context {
+ c.Styles = styles
+ return c
+}
+
+type sgrWriter interface {
+ io.Writer
+ writeSGR(value sgr)
+}
+
+// Fprintf will set the sgr values of the writer to the specified
+// foreground, background and styles, then write the formatted string,
+// then reset the writer.
+func (c *Context) Fprintf(w sgrWriter, format string, args ...interface{}) {
+ w.writeSGR(c)
+ fmt.Fprintf(w, format, args...)
+ w.writeSGR(reset)
+}
+
+// Fprint will set the sgr values of the writer to the specified foreground,
+// background and styles, then formats using the default formats for its
+// operands and writes to w. Spaces are added between operands when neither is
+// a string. It returns the number of bytes written and any write error
+// encountered.
+func (c *Context) Fprint(w sgrWriter, args ...interface{}) {
+ w.writeSGR(c)
+ fmt.Fprint(w, args...)
+ w.writeSGR(reset)
+}
+
+func (c *Context) sgr() string {
+ var values attributes
+ if foreground := c.Foreground.foreground(); foreground != unknownAttribute {
+ values = append(values, foreground)
+ }
+ if background := c.Background.background(); background != unknownAttribute {
+ values = append(values, background)
+ }
+ for _, style := range c.Styles {
+ if value := style.enable(); value != unknownAttribute {
+ values = append(values, value)
+ }
+ }
+ return values.sgr()
+}