package rich import ( "github.com/diamondburned/cchat-gtk/internal/ui/rich/parser/markup" "github.com/diamondburned/cchat/text" "github.com/gotk3/gotk3/gtk" "github.com/gotk3/gotk3/pango" ) // LabelRenderer is the input/output function to render a rich text segment to // Pango markup. type LabelRenderer = func(text.Rich) markup.RenderOutput // RenderSkipImages is a label renderer that skips images. func RenderSkipImages(rich text.Rich) markup.RenderOutput { return markup.RenderCmplxWithConfig(rich, markup.RenderConfig{ SkipImages: true, NoMentionLinks: true, }) } // Label provides an abstraction around a regular GTK label that can be // self-updated. Widgets that extend off of this (such as ToggleButton) does not // need to manually type Label struct { gtk.Label label text.Rich output markup.RenderOutput render LabelRenderer } var _ gtk.IWidget = (*Label)(nil) // NewStaticLabel creates a static, non-updating label. func NewStaticLabel(rich text.Rich) *Label { label, _ := gtk.LabelNew("") label.SetXAlign(0) // left align label.SetEllipsize(pango.ELLIPSIZE_END) if !rich.IsEmpty() { label.SetMarkup(markup.Render(rich)) } return &Label{Label: *label} } // NewLabel creates a self-updating label. func NewLabel(state LabelStateStorer) *Label { return NewLabelWithRenderer(state, nil) } // NewLabelWithRenderer creates a self-updating label using the given renderer. func NewLabelWithRenderer(state LabelStateStorer, r LabelRenderer) *Label { l := NewStaticLabel(text.Plain("")) l.render = r state.OnUpdate(func() { l.SetLabel(state.Label()) }) return l } // Output returns the rendered output. func (l *Label) Output() markup.RenderOutput { return l.output } // SetLabel sets the label in the current thread, meaning it's not thread-safe. func (l *Label) SetLabel(content text.Rich) { // Save a call if the content is empty. if content.IsEmpty() { l.label = content l.output = markup.RenderOutput{} return } l.label = content var out markup.RenderOutput if l.render != nil { out = l.render(content) } else { out = markup.RenderCmplx(content) } l.output = out l.SetMarkup(out.Markup) l.SetTooltipMarkup(out.Markup) } // SetRenderer sets a custom renderer. If the given renderer is nil, then the // default markup renderer is used instead. The label is automatically updated. func (l *Label) SetRenderer(renderer LabelRenderer) { l.render = renderer l.SetLabel(l.label) }