package org.meshbay.client.shell

import android.content.Context
import android.view.View
import android.webkit.WebView

/**
 * While `keepVisible` is set, the WebView is told its window stayed visible
 * when the screen turns off. Chromium then never marks the page hidden, and
 * its freeze of hidden pages — exactly 60 s after hiding, measured (spike
 * S-2a C) — never starts. Set only while a cast runs or music plays: a page that is never
 * hidden is never throttled, which is the battery cost the freeze exists to
 * avoid.
 */
class ShellWebView(context: Context) : WebView(context) {
    var keepVisible = false

    override fun onWindowVisibilityChanged(visibility: Int) {
        super.onWindowVisibilityChanged(if (keepVisible) View.VISIBLE else visibility)
    }

    override fun onVisibilityChanged(changedView: View, visibility: Int) {
        super.onVisibilityChanged(changedView, if (keepVisible) View.VISIBLE else visibility)
    }
}