Tianyi Cui
32aaa8983e
# Conflicts: # docs/development.i18n.yaml # packages/client/ui-conversation/src/client/chat/MessageItem.tsx # packages/client/ui-primitives/src/markdown/CodeBlock.tsx # scripts/snapshots/translation-prompt-v4/request-response.expected.json
49 lines
1.7 KiB
TypeScript
49 lines
1.7 KiB
TypeScript
// Package-internal clipboard write, shared by every copy control in this
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// package (CodeBlock's code copy, TerminalBlock's output copy). Not part of the
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// public surface: consumers get the components, not the host detection.
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/**
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* Write text to the host clipboard, preferring the async Clipboard API and
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* falling back to `execCommand('copy')` on hosts (jsdom, insecure contexts)
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* that omit it.
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* @param text - the exact text to place on the clipboard.
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* @returns true only when the host accepted the write.
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*/
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export async function writeClipboard(text: string): Promise<boolean> {
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// lib.dom types clipboard non-optional, but insecure contexts omit it —
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// that runtime gap is exactly what this guard detects.
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/* oxlint-disable-next-line typescript/no-unnecessary-condition */
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if (navigator.clipboard?.writeText) {
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try {
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await navigator.clipboard.writeText(text)
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return true
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} catch {
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// Denied permissions / iframe policy — do not claim success.
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return false
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}
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}
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// jsdom and older hosts: best-effort execCommand path when present.
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// execCommand('copy') is the only clipboard fallback where the async API
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// is missing; deprecated but deliberately retained.
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/* oxlint-disable typescript/no-deprecated */
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const exec = typeof document.execCommand === 'function'
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? document.execCommand.bind(document)
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: undefined
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if (exec === undefined) return false
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const el = document.createElement('textarea')
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el.value = text
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el.setAttribute('readonly', '')
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el.style.position = 'fixed'
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el.style.left = '-9999px'
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document.body.appendChild(el)
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el.select()
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try {
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return exec('copy')
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} catch {
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return false
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} finally {
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el.remove()
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}
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/* oxlint-enable typescript/no-deprecated */
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}
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