refactor(server): canonicalize service API (#31049)

packages/tui/src/util/selection.ts

@@ -0,0 +1,79 @@
+import type { TuiPlatform } from "../platform"
+
+type Toast = {
+  show: (input: { message: string; variant: "info" | "success" | "warning" | "error" }) => void
+  error: (err: unknown) => void
+}
+
+type FocusableSelectionTarget = {
+  hasSelection: () => boolean
+  getClipboardText?: (text: string) => string
+}
+
+type Renderer = {
+  getSelection: () => { getSelectedText: () => string; selectedRenderables: FocusableSelectionTarget[] } | null
+  clearSelection: () => void
+  currentFocusedRenderable?: FocusableSelectionTarget | null
+}
+
+type SelectionKeyEvent = {
+  ctrl?: boolean
+  name: string
+  preventDefault: () => void
+  stopPropagation: () => void
+}
+
+export function copy(renderer: Renderer, toast: Toast, clipboard: TuiPlatform["clipboard"]): boolean {
+  const selection = renderer.getSelection()
+  if (!selection) return false
+
+  const text = selection.getSelectedText()
+  if (!text) return false
+
+  const focus = renderer.currentFocusedRenderable
+  const clipboardText =
+    focus?.getClipboardText && selection.selectedRenderables.includes(focus) ? focus.getClipboardText(text) : text
+
+  clipboard
+    ?.write?.(clipboardText)
+    .then(() => toast.show({ message: "Copied to clipboard", variant: "info" }))
+    .catch(toast.error)
+
+  renderer.clearSelection()
+  return true
+}
+
+export function handleSelectionKey(
+  renderer: Renderer,
+  toast: Toast,
+  event: SelectionKeyEvent,
+  clipboard: TuiPlatform["clipboard"],
+) {
+  const selection = renderer.getSelection()
+  if (!selection) return
+
+  if (event.ctrl && event.name === "c") {
+    if (!copy(renderer, toast, clipboard)) {
+      renderer.clearSelection()
+      return
+    }
+
+    event.preventDefault()
+    event.stopPropagation()
+    return
+  }
+
+  if (event.name === "escape") {
+    renderer.clearSelection()
+    event.preventDefault()
+    event.stopPropagation()
+    return
+  }
+
+  const focus = renderer.currentFocusedRenderable
+  if (focus?.hasSelection() && selection.selectedRenderables.includes(focus)) return
+
+  renderer.clearSelection()
+}
+
+export * as Selection from "./selection"