Fix paste ownership, input bounds, and IPC validation

Supersedes #5745, #5746, and #5747.

src/shared/github-project-ref-input.ts

@@ -0,0 +1,19 @@
+import { getClipboardTextByteLength, isClipboardTextByteLengthOverLimit } from './clipboard-text'
+
+export const GITHUB_PROJECT_REF_INPUT_MAX_BYTES = 2 * 1024
+export const GITHUB_PROJECT_REF_INPUT_TOO_LARGE_ERROR = 'Project reference is too large to resolve.'
+
+export function getGitHubProjectRefInputByteLength(input: string): number {
+  return getClipboardTextByteLength(input)
+}
+
+export function isGitHubProjectRefInputTooLarge(
+  input: string,
+  maxBytes = GITHUB_PROJECT_REF_INPUT_MAX_BYTES
+): boolean {
+  return isClipboardTextByteLengthOverLimit(input, maxBytes)
+}
+
+export function hasBoundedGitHubProjectRefInputText(input: string): boolean {
+  return !isGitHubProjectRefInputTooLarge(input) && /\S/.test(input)
+}