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/*
* Copyright 2018 Allan Wang
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.pitchedapps.frost.views
import android.animation.ValueAnimator
import android.annotation.SuppressLint
import android.content.Context
import android.graphics.Color
import android.util.AttributeSet
import android.view.View
import android.view.ViewGroup
import ca.allanwang.kau.utils.AnimHolder
import ca.allanwang.kau.utils.ctxCoroutine
import ca.allanwang.kau.utils.launchMain
import com.pitchedapps.frost.contracts.FrostContentContainer
import com.pitchedapps.frost.contracts.FrostContentCore
import com.pitchedapps.frost.contracts.FrostContentParent
import com.pitchedapps.frost.db.CookieDao
import com.pitchedapps.frost.db.currentCookie
import com.pitchedapps.frost.facebook.FB_HOME_URL
import com.pitchedapps.frost.facebook.FbCookie
import com.pitchedapps.frost.facebook.USER_AGENT
import com.pitchedapps.frost.fragments.WebFragment
import com.pitchedapps.frost.injectors.ThemeProvider
import com.pitchedapps.frost.prefs.Prefs
import com.pitchedapps.frost.utils.L
import com.pitchedapps.frost.utils.frostDownload
import com.pitchedapps.frost.web.FrostChromeClient
import com.pitchedapps.frost.web.FrostJSI
import com.pitchedapps.frost.web.FrostWebViewClient
import com.pitchedapps.frost.web.NestedWebView
import kotlin.math.abs
import kotlin.math.max
import kotlin.math.min
import org.koin.core.component.KoinComponent
import org.koin.core.component.inject
/**
* Created by Allan Wang on 2017-05-29.
*
*/
class FrostWebView @JvmOverloads constructor(
context: Context,
attrs: AttributeSet? = null,
defStyleAttr: Int = 0
) : NestedWebView(context, attrs, defStyleAttr),
FrostContentCore,
KoinComponent {
val fbCookie: FbCookie by inject()
val prefs: Prefs by inject()
val themeProvider: ThemeProvider by inject()
val cookieDao: CookieDao by inject()
override fun reload(animate: Boolean) {
if (parent.registerTransition(false, animate))
super.reload()
}
override lateinit var parent: FrostContentParent
internal lateinit var frostWebClient: FrostWebViewClient
override val currentUrl: String
get() = url ?: ""
@SuppressLint("SetJavaScriptEnabled")
override fun bind(container: FrostContentContainer): View {
userAgentString = USER_AGENT
with(settings) {
javaScriptEnabled = true
mediaPlaybackRequiresUserGesture = false // TODO check if we need this
allowFileAccess = true
textZoom = prefs.webTextScaling
domStorageEnabled = true
}
setLayerType(LAYER_TYPE_HARDWARE, null)
// attempt to get custom client; otherwise fallback to original
frostWebClient = (container as? WebFragment)?.client(this) ?: FrostWebViewClient(this)
webViewClient = frostWebClient
webChromeClient = FrostChromeClient(this)
addJavascriptInterface(FrostJSI(this), "Frost")
setBackgroundColor(Color.TRANSPARENT)
setDownloadListener { url, userAgent, contentDisposition, mimetype, contentLength ->
context.ctxCoroutine.launchMain {
val cookie = cookieDao.currentCookie(prefs) ?: return@launchMain
context.frostDownload(
cookie.cookie,
url,
userAgent,
contentDisposition,
mimetype,
contentLength
)
}
}
return this
}
/**
* Wrapper to the main userAgentString to cache it.
* This decouples it from the UiThread
*
* Note that this defaults to null, but the main purpose is to
* check if we've set our own agent.
*
* A null value may be interpreted as the default value
*/
var userAgentString: String? = null
set(value) {
field = value
settings.userAgentString = value
}
init {
isNestedScrollingEnabled = true
}
fun loadUrl(url: String?, animate: Boolean) {
if (url == null) return
if (parent.registerTransition(this.url != url, animate))
super.loadUrl(url)
}
override fun reloadBase(animate: Boolean) {
loadUrl(parent.baseUrl, animate)
}
/**
* 2018-10-17. facebook automatically adds their home page to the back stack,
* regardless of the loaded url. We will make sure we skip it when going back.
*
* 2019-10-14. Looks like facebook now randomly populates some links with the home page,
* especially those that are launched with a blank target...
* In some cases, there can be more than one home target in a row.
*/
override fun onBackPressed(): Boolean {
val list = copyBackForwardList()
if (list.currentIndex >= 2) {
val skipCount = (1..list.currentIndex).firstOrNull {
list.getItemAtIndex(list.currentIndex - it).url != FB_HOME_URL
} ?: return false // If no non home url is found, we will treat the stack as empty
L.v { "onBackPress: going back ${if (skipCount == 1) "one page" else "$skipCount pages"}" }
goBackOrForward(-skipCount)
return true
}
if (list.currentIndex == 1 && list.getItemAtIndex(0).url == FB_HOME_URL) {
return false
}
if (list.currentIndex > 0) {
goBack()
return true
}
return false
}
/**
* If webview is already at the top, refresh
* Otherwise scroll to top
*/
override fun onTabClicked() {
if (scrollY < 5) reloadBase(true)
else scrollToTop()
}
private fun scrollToTop() {
flingScroll(0, 0) // stop fling
if (scrollY > 10000)
scrollTo(0, 0)
else
smoothScrollTo(0)
}
private fun smoothScrollTo(y: Int) {
ValueAnimator.ofInt(scrollY, y).apply {
duration = min(abs(scrollY - y), 500).toLong()
interpolator = AnimHolder.fastOutSlowInInterpolator(context)
addUpdateListener { scrollY = it.animatedValue as Int }
start()
}
}
private fun smoothScrollBy(y: Int) = smoothScrollTo(max(0, scrollY + y))
override var active: Boolean = true
set(value) {
if (field == value) return
field = value
if (field) onResume()
else onPause()
}
override fun reloadTheme() {
reloadThemeSelf()
}
override fun reloadThemeSelf() {
reload(false) // todo see if there's a better solution
}
override fun reloadTextSize() {
reloadTextSizeSelf()
}
override fun reloadTextSizeSelf() {
settings.textZoom = prefs.webTextScaling
}
override fun destroy() {
(getParent() as? ViewGroup)?.removeView(this)
super.destroy()
}
}
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