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text.go
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text.go
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package app
import (
"context"
"html"
"io"
"github.com/maxence-charriere/go-app/v9/pkg/errors"
)
// Text creates a simple text element.
func Text(v any) UI {
return &text{value: toString(v)}
}
type text struct {
disp Dispatcher
jsvalue Value
parentElem UI
value string
}
func (t *text) Kind() Kind {
return SimpleText
}
func (t *text) JSValue() Value {
return t.jsvalue
}
func (t *text) Mounted() bool {
return t.jsvalue != nil && t.getDispatcher() != nil
}
func (t *text) name() string {
return "text"
}
func (t *text) self() UI {
return t
}
func (t *text) setSelf(n UI) {
}
func (t *text) getContext() context.Context {
return context.TODO()
}
func (t *text) getDispatcher() Dispatcher {
return t.disp
}
func (t *text) getAttributes() attributes {
return nil
}
func (t *text) getEventHandlers() eventHandlers {
return nil
}
func (t *text) getParent() UI {
return t.parentElem
}
func (t *text) setParent(p UI) {
t.parentElem = p
}
func (t *text) getChildren() []UI {
return nil
}
func (t *text) mount(d Dispatcher) error {
if t.Mounted() {
return errors.New("mounting ui element failed").
WithTag("reason", "already mounted").
WithTag("kind", t.Kind()).
WithTag("name", t.name()).
WithTag("value", t.value)
}
t.disp = d
t.jsvalue = Window().createTextNode(t.value)
return nil
}
func (t *text) dismount() {
t.jsvalue = nil
}
func (t *text) canUpdateWith(n UI) bool {
_, ok := n.(*text)
return ok
}
func (t *text) updateWith(n UI) error {
if !t.Mounted() {
return nil
}
o, _ := n.(*text)
if t.value != o.value {
t.value = o.value
t.JSValue().setNodeValue(o.value)
}
return nil
}
func (t *text) onComponentEvent(any) {
}
func (t *text) html(w io.Writer) {
w.Write([]byte(html.EscapeString(t.value)))
}
func (t *text) htmlWithIndent(w io.Writer, indent int) {
writeIndent(w, indent)
w.Write([]byte(html.EscapeString(t.value)))
}