Function onKeyEvent

pages/hud_page.js:29–76

(event)

}

export function onKeyEvent(event) {
  // Handle <Enter> on "keypress", and other events on "keydown"; this avoids interence with CJK
  // translation (see #2915 and #2934).
  let rawQuery;
  if ((event.type === "keypress") && (event.key !== "Enter")) {
    return null;
  }
  if ((event.type === "keydown") && (event.key === "Enter")) {
    return null;
  }

  const inputEl = document.querySelector("#hud-find-input");
  // Don't do anything if we're not in find mode.
  if (inputEl == null) return;

  if (
    (KeyboardUtils.isBackspace(event) && (inputEl.textContent.length === 0)) ||
    (event.key === "Enter") || KeyboardUtils.isEscape(event)
  ) {
    inputEl.blur();
    UIComponentMessenger.postMessage({
      name: "hideFindMode",
      exitEventIsEnter: event.key === "Enter",
      exitEventIsEscape: KeyboardUtils.isEscape(event),
    });
  } else if (event.key === "ArrowUp") {
    if (rawQuery = FindModeHistory.getQuery(findMode.historyIndex + 1)) {
      findMode.historyIndex += 1;
      if (findMode.historyIndex === 0) {
        findMode.partialQuery = findMode.rawQuery;
      }
      setTextInInputElement(inputEl, rawQuery);
      findMode.executeQuery();
    }
  } else if (event.key === "ArrowDown") {
    findMode.historyIndex = Math.max(-1, findMode.historyIndex - 1);
    rawQuery = 0 <= findMode.historyIndex
      ? FindModeHistory.getQuery(findMode.historyIndex)
      : findMode.partialQuery;
    setTextInInputElement(inputEl, rawQuery);
    findMode.executeQuery();
  } else {
    return;
  }

  DomUtils.suppressEvent(event);
  return false;
}

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