Function onInput

source code/hooks/useTextInput.ts:433–503

(input: string, key: Key)

  }

  function onInput(input: string, key: Key): void {
    // Note: Image paste shortcut (chat:imagePaste) is handled via useKeybindings in PromptInput

    // Apply filter if provided
    const filteredInput = inputFilter ? inputFilter(input, key) : input

    // If the input was filtered out, do nothing
    if (filteredInput === '' && input !== '') {
      return
    }

    // Fix Issue #1853: Filter DEL characters that interfere with backspace in SSH/tmux
    // In SSH/tmux environments, backspace generates both key events and raw DEL chars
    if (!key.backspace && !key.delete && input.includes('\x7f')) {
      const delCount = (input.match(/\x7f/g) || []).length

      // Apply all DEL characters as backspace operations synchronously
      // Try to delete tokens first, fall back to character backspace
      let currentCursor = cursor
      for (let i = 0; i < delCount; i++) {
        currentCursor =
          currentCursor.deleteTokenBefore() ?? currentCursor.backspace()
      }

      // Update state once with the final result
      if (!cursor.equals(currentCursor)) {
        if (cursor.text !== currentCursor.text) {
          onChange(currentCursor.text)
        }
        setOffset(currentCursor.offset)
      }
      resetKillAccumulation()
      resetYankState()
      return
    }

    // Reset kill accumulation for non-kill keys
    if (!isKillKey(key, filteredInput)) {
      resetKillAccumulation()
    }

    // Reset yank state for non-yank keys (breaks yank-pop chain)
    if (!isYankKey(key, filteredInput)) {
      resetYankState()
    }

    const nextCursor = mapKey(key)(filteredInput)
    if (nextCursor) {
      if (!cursor.equals(nextCursor)) {
        if (cursor.text !== nextCursor.text) {
          onChange(nextCursor.text)
        }
        setOffset(nextCursor.offset)
      }
      // SSH-coalesced Enter: on slow links, "o" + Enter can arrive as one
      // chunk "o\r". parseKeypress only matches s === '\r', so it hit the
      // default handler above (which stripped the trailing \r). Text with
      // exactly one trailing \r is coalesced Enter; lone \r is Alt+Enter