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// This is the devtools script, which is called when the user opens the
// Chrome devtool on a page. We check to see if we global hook has detected
// Vue presence on the page. If yes, create the Vue panel; otherwise poll
// for 10 seconds.

let created = false
let checkCount = 0

chrome.devtools.network.onNavigated.addListener(createPanelIfHasVue)
const checkVueInterval = setInterval(createPanelIfHasVue, 1000)
createPanelIfHasVue()

function createPanelIfHasVue() {
  if (created || checkCount++ > 10) {
    clearInterval(checkVueInterval)
    return
  }
  chrome.devtools.inspectedWindow.eval(
    '!!(window.__VUE_DEVTOOLS_GLOBAL_HOOK__ && (window.__VUE_DEVTOOLS_GLOBAL_HOOK__.Vue || window.__VUE_DEVTOOLS_GLOBAL_HOOK__.apps.length))',
    (hasVue) => {
      if (!hasVue || created) {
        return
      }
      clearInterval(checkVueInterval)
      created = true
      chrome.devtools.panels.create(
        'Vue',
        'icons/128.png',
        'devtools.html',
        (panel) => {
          // panel loaded
          panel.onShown.addListener(onPanelShown)
          panel.onHidden.addListener(onPanelHidden)
        },
      )
    },
  )
}

// Manage panel visibility

function onPanelShown() {
  chrome.runtime.sendMessage('vue-panel-shown')
}

function onPanelHidden() {
  chrome.runtime.sendMessage('vue-panel-hidden')
}