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React_Client_App_Access
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  1. {"ast":null,"code":"import { eventScope } from '../utils/';\nvar KEY_CODE;\n\n(function (KEY_CODE) {\n  KEY_CODE[KEY_CODE[\"TAB\"] = 9] = \"TAB\";\n  KEY_CODE[KEY_CODE[\"SPACE\"] = 32] = \"SPACE\";\n  KEY_CODE[KEY_CODE[\"PAGE_UP\"] = 33] = \"PAGE_UP\";\n  KEY_CODE[KEY_CODE[\"PAGE_DOWN\"] = 34] = \"PAGE_DOWN\";\n  KEY_CODE[KEY_CODE[\"END\"] = 35] = \"END\";\n  KEY_CODE[KEY_CODE[\"HOME\"] = 36] = \"HOME\";\n  KEY_CODE[KEY_CODE[\"LEFT\"] = 37] = \"LEFT\";\n  KEY_CODE[KEY_CODE[\"UP\"] = 38] = \"UP\";\n  KEY_CODE[KEY_CODE[\"RIGHT\"] = 39] = \"RIGHT\";\n  KEY_CODE[KEY_CODE[\"DOWN\"] = 40] = \"DOWN\";\n})(KEY_CODE || (KEY_CODE = {}));\n\nexport function keyboardHandler(scrollbar) {\n  var addEvent = eventScope(scrollbar);\n  var container = scrollbar.containerEl;\n  addEvent(container, 'keydown', function (evt) {\n    var activeElement = document.activeElement;\n\n    if (activeElement !== container && !container.contains(activeElement)) {\n      return;\n    }\n\n    if (isEditable(activeElement)) {\n      return;\n    }\n\n    var delta = getKeyDelta(scrollbar, evt.keyCode || evt.which);\n\n    if (!delta) {\n      return;\n    }\n\n    var x = delta[0],\n        y = delta[1];\n    scrollbar.addTransformableMomentum(x, y, evt, function (willScroll) {\n      if (willScroll) {\n        evt.preventDefault();\n      } else {\n        scrollbar.containerEl.blur();\n\n        if (scrollbar.parent) {\n          scrollbar.parent.containerEl.focus();\n        }\n      }\n    });\n  });\n}\n\nfunction getKeyDelta(scrollbar, keyCode) {\n  var size = scrollbar.size,\n      limit = scrollbar.limit,\n      offset = scrollbar.offset;\n\n  switch (keyCode) {\n    case KEY_CODE.TAB:\n      return handleTabKey(scrollbar);\n\n    case KEY_CODE.SPACE:\n      return [0, 200];\n\n    case KEY_CODE.PAGE_UP:\n      return [0, -size.container.height + 40];\n\n    case KEY_CODE.PAGE_DOWN:\n      return [0, size.container.height - 40];\n\n    case KEY_CODE.END:\n      return [0, limit.y - offset.y];\n\n    case KEY_CODE.HOME:\n      return [0, -offset.y];\n\n    case KEY_CODE.LEFT:\n      return [-40, 0];\n\n    case KEY_CODE.UP:\n      return [0, -40];\n\n    case KEY_CODE.RIGHT:\n      return [40, 0];\n\n    case KEY_CODE.DOWN:\n      return [0, 40];\n\n    default:\n      return null;\n  }\n}\n\nfunction handleTabKey(scrollbar) {\n  // handle in next frame\n  requestAnimationFrame(function () {\n    scrollbar.scrollIntoView(document.activeElement, {\n      offsetTop: scrollbar.size.container.height / 2,\n      onlyScrollIfNeeded: true\n    });\n  });\n}\n\nfunction isEditable(elem) {\n  if (elem.tagName === 'INPUT' || elem.tagName === 'SELECT' || elem.tagName === 'TEXTAREA' || elem.isContentEditable) {\n    return !elem.disabled;\n  }\n\n  return false;\n}","map":null,"metadata":{},"sourceType":"module"}