markdown-viewer/content/options.js

var state = {
  protocol: 'https',
  protocols: ['https', 'http', '*'],
  origin: '',
  origins: {},
  timeout: null,
  file: true
}

var events = {
  file: () => {
    chrome.tabs.create({url: 'chrome://extensions/?id=' + chrome.runtime.id})
  },

  protocol: (e) => {
    state.protocol = state.protocols[e.target.selectedIndex]
  },

  origin: (e) => {
    state.origin = e.target.value
  },

  add: () => {
    var host = state.origin
      .replace(/^(file|http(s)?):\/\//, '')
      .replace(/\/.*$/, '')

    if (!host) {
      return
    }

    var origin = state.protocol + '://' + host
    chrome.permissions.request({origins: [origin + '/*']}, (granted) => {
      if (granted) {
        chrome.runtime.sendMessage({message: 'add', origin}, (res) => {
          state.origin = ''
          get()
        })
      }
    })
  },

  remove: (origin) => () => {
    chrome.permissions.remove({origins: [origin + '/*']}, (removed) => {
      if (removed) {
        chrome.runtime.sendMessage({message: 'remove', origin}, (res) => {
          get()
        })
      }
    })
  },

  update: (origin) => (e) => {
    state.origins[origin] = e.target.value
    clearTimeout(state.timeout)
    state.timeout = setTimeout(() => {
      chrome.runtime.sendMessage({
        message: 'update', origin, match: e.target.value
      }, (res) => {})
    }, 750)
  },

  refresh: (origin) => () => {
    chrome.permissions.request({origins: [origin + '/*']}, (granted) => {})
  }
}

chrome.extension.isAllowedFileSchemeAccess((isAllowedAccess) => {
  state.file = isAllowedAccess
  m.redraw()
})

function get () {
  chrome.runtime.sendMessage({message: 'origins'}, (res) => {
    state.origins = res.origins
    m.redraw()
  })
}

get()

function oncreate (vnode) {
  componentHandler.upgradeElements(vnode.dom)
}

m.mount(document.querySelector('main'), {
  view: () =>
    m('.mdl-grid',
      (!state.file || null) &&
      m('.mdl-cell mdl-cell--8-col-tablet mdl-cell--12-col-desktop',
        m('.bs-callout bs-callout-danger',
          m('h4', 'Access to file:// URLs is Disabled'),
          m('img.mdl-shadow--2dp', {src: '/images/file-urls.png'}),
          m('button.mdl-button mdl-js-button mdl-button--raised mdl-js-ripple-effect',
            {oncreate, onclick: events.file},
            'Enable Access to file:// URLs'
          )
        )
      ),

      m('.mdl-cell mdl-cell--8-col-tablet mdl-cell--12-col-desktop',
        m('h4', 'Add New Origin')
      ),
      m('.mdl-cell mdl-cell--8-col-tablet mdl-cell--12-col-desktop',
        m('select.mdl-shadow--2dp', {onchange: events.protocol},
          state.protocols.map((protocol) =>
          m('option', {value: protocol}, protocol + '://')
        )),
        m('.mdl-textfield mdl-js-textfield', {oncreate},
          m('input.mdl-textfield__input', {
            value: state.origin,
            onchange: events.origin,
            placeholder: 'raw.githubusercontent.com'
          }),
          m('label.mdl-textfield__label')
        ),
        m('button.mdl-button mdl-js-button mdl-button--raised mdl-js-ripple-effect',
          {oncreate, onclick: events.add},
          'Add')
      ),

      m('.mdl-cell mdl-cell--8-col-tablet mdl-cell--12-col-desktop',
        m('h4', 'Allowed Origins')
      ),
      m('.mdl-cell mdl-cell--8-col-tablet mdl-cell--12-col-desktop',
        m('table.mdl-data-table mdl-js-data-table mdl-data-table--selectable mdl-shadow--2dp',
          Object.keys(state.origins).sort().map((origin) =>
          m('tr',
            m('td.mdl-data-table__cell--non-numeric',
              origin.replace(/^(\*|file|http(s)?).*/, '$1')),
            m('td.mdl-data-table__cell--non-numeric',
              origin.replace(/^(\*|file|http(s)?):\/\//, '')),
            m('td.mdl-data-table__cell--non-numeric',
              m('.mdl-textfield mdl-js-textfield', {oncreate},
                m('input.mdl-textfield__input',
                  {onkeyup: events.update(origin), value: state.origins[origin]}),
                m('label.mdl-textfield__label')
              )
            ),
            m('td',
              (origin !== 'file://' || null) &&
              m('button.mdl-button mdl-js-button mdl-js-ripple-effect mdl-button--icon',
                {oncreate, onclick: events.refresh(origin), title: 'Refresh'},
                m('i.material-icons icon-refresh')
              ),
              (origin !== 'file://' || null) &&
              m('button.mdl-button mdl-js-button mdl-js-ripple-effect mdl-button--icon',
                {oncreate, onclick: events.remove(origin), title: 'Remove'},
                m('i.material-icons icon-remove')
              )
            )
          )
        ))
      )
    )
})