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uiwrapcontainer.go
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/
uiwrapcontainer.go
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package jaws
import (
"html/template"
"io"
"slices"
"strings"
"github.com/linkdata/deadlock"
)
type uiWrapContainer struct {
UiHtml
Container
mu deadlock.Mutex
contents []*Element
}
func (ui *uiWrapContainer) renderContainer(e *Element, w io.Writer, outerhtmltag string, params []any) error {
ui.parseGetter(e, ui.Container)
attrs := e.ParseParams(params)
b := e.Jid().AppendStartTagAttr(nil, outerhtmltag)
for _, attr := range attrs {
b = append(b, ' ')
b = append(b, attr...)
}
b = append(b, '>')
_, err := w.Write(b)
if err == nil {
for _, cui := range ui.Container.JawsContains(e) {
if err == nil {
elem := e.Request.NewElement(cui)
ui.contents = append(ui.contents, elem)
err = elem.Render(w, nil)
}
}
b = b[:0]
b = append(b, "</"...)
b = append(b, outerhtmltag...)
b = append(b, '>')
if err == nil {
_, err = w.Write(b)
}
}
return err
}
func (ui *uiWrapContainer) JawsUpdate(e *Element) {
var toRemove, toAppend []*Element
var orderData []Jid
oldMap := make(map[UI]*Element)
newMap := make(map[UI]struct{})
newContents := ui.Container.JawsContains(e)
for _, t := range newContents {
newMap[t] = struct{}{}
}
ui.mu.Lock()
oldOrder := make([]Jid, len(ui.contents))
for i, elem := range ui.contents {
oldOrder[i] = elem.Jid()
oldMap[elem.Ui()] = elem
if _, ok := newMap[elem.Ui()]; !ok {
toRemove = append(toRemove, elem)
}
}
ui.contents = ui.contents[:0]
for _, cui := range newContents {
var elem *Element
if elem = oldMap[cui]; elem == nil {
elem = e.Request.NewElement(cui)
toAppend = append(toAppend, elem)
}
ui.contents = append(ui.contents, elem)
orderData = append(orderData, elem.Jid())
}
ui.mu.Unlock()
for _, elem := range toRemove {
e.Remove(elem.Jid().String())
e.Request.deleteElement(elem)
}
for _, elem := range toAppend {
var sb strings.Builder
maybePanic(elem.Render(&sb, nil))
e.Append(template.HTML(sb.String())) // #nosec G203
}
if !slices.Equal(oldOrder, orderData) {
e.Order(orderData)
}
}