git ssb

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const nest = require('depnest')
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exports.gives = nest('app.sync.catchKeyboardShortcut')
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exports.needs = nest({
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  'app.html.searchBar': 'first',
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  'app.html.tabs': 'first',
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  'app.sync.goTo': 'first'
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})
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var gPressed = false
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exports.create = function (api) {
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  return nest('app.sync.catchKeyboardShortcut', catchKeyboardShortcut)
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  function catchKeyboardShortcut (root) {
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    var tabs = api.app.html.tabs()
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    var search = api.app.html.searchBar()
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    var goTo = api.app.sync.goTo
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    root.addEventListener('keydown', (ev) => {
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      isTextFieldEvent(ev)
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        ? textFieldShortcuts(ev)
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        : genericShortcuts(ev, { tabs, search, goTo })
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    })
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  }
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}
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function isTextFieldEvent (ev) {
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  const tag = ev.target.nodeName
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  return (tag === 'INPUT' || tag === 'TEXTAREA')
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}
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function textFieldShortcuts (ev) {
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  switch (ev.keyCode) {
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    case 13: // ctrl+enter
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      if (ev.ctrlKey) {
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        ev.target.publish && ev.target.publish() // expects the textField to have a publish method
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      }
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      return
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    case 27: // esc
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      return ev.target.blur()
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  }
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}
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function genericShortcuts (ev, { tabs, search, goTo, back }) {
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  let scroll
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  const currentPage = tabs.currentPage()
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  // TODO change this scroll API - it seems some pages
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  // (e.g. Dark Crystal Index) has scroll defined and expect an object
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  if (currentPage) {
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    scroll = currentPage.keyboardScroll || noop
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  } else {
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    scroll = noop
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  }
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  // Messages
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  if (ev.keyCode === 71) { // gg = scroll to top
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    if (!gPressed) {
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      gPressed = true
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      window.setTimeout(() => {
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        gPressed = false
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      }, 3000)
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      return
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    }
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    scroll('first')
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  }
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  gPressed = false
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  switch (ev.keyCode) {
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    // Messages (cont'd)
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    case 74: // j = older
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      return scroll(1)
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    case 75: // k = newer
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      return scroll(-1)
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    case 13: // enter = open
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      return goToMessage(ev, { goTo })
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    case 79: // o = open
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      return goToMessage(ev, { goTo })
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    case 192: // ` = toggle raw message view
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      return toggleRawMessage(ev)
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    // Tabs
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    case 72: // h = left
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      tabs.selectRelative(-1)
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      return goTo(JSON.parse(tabs.currentPage().id))
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    case 76: // l = right
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      tabs.selectRelative(1)
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      return goTo(JSON.parse(tabs.currentPage().id))
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    case 88: // x = close
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      tabs.closeCurrentTab()
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      return
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    // Search
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    case 191: // / = routes search
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      if (ev.shiftKey) search.activate('?', ev)
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      else search.activate('/', ev)
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      return
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    case 50: // @ = mention search
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      if (ev.shiftKey) search.activate('@', ev)
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      return
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    case 51: // # = channel search
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      if (ev.shiftKey) search.activate('#', ev)
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      return
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    case 53: // % = message search
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      if (ev.shiftKey) search.activate('%', ev)
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  }
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}
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function goToMessage (ev, { goTo }) {
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  const msg = ev.target
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  if (msg.dataset && msg.dataset.key) {
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    goTo(msg.dataset.key)
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    // TODO - rm the dataset.root decorator
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  }
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}
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function toggleRawMessage (ev) {
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  const msg = ev.target
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  if (!msg.classList.contains('Message')) return
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  // this uses a crudely exported nav api
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  const target = msg.querySelector('.meta .toggle-raw-msg')
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  if (target) target.click()
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}
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function noop () {}
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