Why Go
- Case Studies
  
  Common problems companies solve with Go
- Use Cases
  
  Stories about how and why companies use Go
- Security
  
  How Go can help keep you secure by default
Learn
Docs
- Effective Go
  
  Tips for writing clear, performant, and idiomatic Go code
- Go User Manual
  
  A complete introduction to building software with Go
- Standard library
  
  Reference documentation for Go's standard library
- Release Notes
  
  Learn what's new in each Go release
- API
  
  Reference documentation for the pkg.go.dev API
Packages
Community
- Recorded Talks
  
  Videos from prior events
- Meetups
  
  Meet other local Go developers
- Conferences
  
  Learn and network with Go developers from around the world
- Go blog
  
  The Go project's official blog.
- Go project
  
  Get help and stay informed from Go
- Get connected

gutter

package

Go to main page

Versions in this module

v0

v0.8.1

Jul 3, 2026

v0.8.0

Jul 3, 2026

v0.7.0

Apr 26, 2026

v0.6.1

Apr 20, 2026

v0.6.0

Mar 24, 2026

v0.5.0

Mar 23, 2026

Changes in this version

+ type GutterClickEvent struct

+ Line int

+ Modifiers key.Modifiers

+ NumClicks int

+ ProviderID string

+ Source pointer.Source

+ type GutterColors struct

+ Background gvcolor.Color

+ Custom map[string]gvcolor.Color

+ LineHighlight gvcolor.Color

+ Text gvcolor.Color

+ TextHighlight gvcolor.Color

+ type GutterContext struct

+ Colors *GutterColors

+ CurrentLine int

+ LineHeight fixed.Int26_6

+ Paragraphs []Paragraph

+ Shaper *text.Shaper

+ TextParams text.Parameters

+ Viewport image.Rectangle

+ type GutterEvent interface

+ type GutterHoverEvent struct

+ Info *HoverInfo

+ Line int

+ ProviderID string

+ type GutterProvider interface

+ ID func() string

+ Layout func(gtx layout.Context, ctx GutterContext) layout.Dimensions

+ Priority func() int

+ Width func(gtx layout.Context, shaper *text.Shaper, params text.Parameters, lineCount int) unit.Dp

+ type HoverInfo struct

+ Text string

+ Widget layout.Widget

+ type InteractiveGutter interface

+ HandleClick func(line int, source pointer.Source, numClicks int, modifiers key.Modifiers) bool

+ HandleHover func(line int) *HoverInfo

+ type LineHighlight struct

+ Color gvcolor.Color

+ Line int

+ type LineHighlighter interface

+ HighlightedLines func() []LineHighlight

+ type Manager struct

+ func NewManager() *Manager

+ func (m *Manager) CalculateWidth(gtx layout.Context, shaper *text.Shaper, params text.Parameters, lineCount int) int

+ func (m *Manager) CollectHighlights() []LineHighlight

+ func (m *Manager) GetProvider(id string) GutterProvider

+ func (m *Manager) HasProviders() bool

+ func (m *Manager) Layout(gtx layout.Context, ctx GutterContext) layout.Dimensions

+ func (m *Manager) Providers() []GutterProvider

+ func (m *Manager) Register(provider GutterProvider)

+ func (m *Manager) SetGap(gap unit.Dp)

+ func (m *Manager) TotalWidth() int

+ func (m *Manager) Unregister(id string)

+ func (m *Manager) Update(gtx layout.Context) (GutterEvent, bool)

+ type Paragraph struct

+ Ascent fixed.Int26_6

+ Descent fixed.Int26_6

+ EndY int

+ Index int

+ RuneOff int

+ Runes int

+ StartY int