Browser activity

app/src/main/java/org/koitharu/kotatsu/ui/browser/BrowserActivity.kt

@@ -0,0 +1,94 @@
+package org.koitharu.kotatsu.ui.browser
+
+import android.annotation.SuppressLint
+import android.content.ActivityNotFoundException
+import android.content.Context
+import android.content.Intent
+import android.net.Uri
+import android.os.Bundle
+import android.view.Menu
+import android.view.MenuItem
+import androidx.core.view.isVisible
+import kotlinx.android.synthetic.main.activity_browser.*
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.ui.common.BaseActivity
+
+@SuppressLint("SetJavaScriptEnabled")
+class BrowserActivity : BaseActivity(), BrowserCallback {
+
+	override fun onCreate(savedInstanceState: Bundle?) {
+		super.onCreate(savedInstanceState)
+		setContentView(R.layout.activity_browser)
+		supportActionBar?.run {
+			setDisplayHomeAsUpEnabled(true)
+			setHomeAsUpIndicator(R.drawable.ic_cross)
+		}
+		with(webView.settings) {
+			javaScriptEnabled = true
+		}
+		webView.webViewClient = BrowserClient(this)
+		val url = intent?.dataString
+		if (url.isNullOrEmpty()) {
+			finish()
+		} else {
+			webView.loadUrl(url)
+		}
+	}
+
+	override fun onCreateOptionsMenu(menu: Menu?): Boolean {
+		menuInflater.inflate(R.menu.opt_browser, menu)
+		return super.onCreateOptionsMenu(menu)
+	}
+
+	override fun onOptionsItemSelected(item: MenuItem): Boolean = when (item.itemId) {
+		android.R.id.home -> {
+			webView.stopLoading()
+			finish()
+			true
+		}
+		R.id.action_browser -> {
+			val intent = Intent(Intent.ACTION_VIEW)
+			intent.data = Uri.parse(webView.url)
+			try {
+				startActivity(Intent.createChooser(intent, item.title))
+			} catch (_: ActivityNotFoundException) {
+			}
+			true
+		}
+		else -> super.onOptionsItemSelected(item)
+	}
+
+	override fun onBackPressed() {
+		if (webView.canGoBack()) {
+			webView.goBack()
+		} else {
+			super.onBackPressed()
+		}
+	}
+
+	override fun onPause() {
+		webView.onPause()
+		super.onPause()
+	}
+
+	override fun onResume() {
+		super.onResume()
+		webView.onResume()
+	}
+
+	override fun onLoadingStateChanged(isLoading: Boolean) {
+		progressBar.isVisible = isLoading
+	}
+
+	override fun onTitleChanged(title: CharSequence, subtitle: CharSequence?) {
+		this.title = title
+		supportActionBar?.subtitle = subtitle
+	}
+
+	companion object {
+
+		@JvmStatic
+		fun newIntent(context: Context, url: String) = Intent(context, BrowserActivity::class.java)
+			.setData(Uri.parse(url))
+	}
+}

app/src/main/java/org/koitharu/kotatsu/ui/browser/BrowserCallback.kt

@@ -0,0 +1,8 @@
+package org.koitharu.kotatsu.ui.browser
+
+interface BrowserCallback {
+
+	fun onLoadingStateChanged(isLoading: Boolean)
+
+	fun onTitleChanged(title: CharSequence, subtitle: CharSequence?)
+}

app/src/main/java/org/koitharu/kotatsu/ui/browser/BrowserClient.kt

@@ -0,0 +1,57 @@
+package org.koitharu.kotatsu.ui.browser
+
+import android.graphics.Bitmap
+import android.webkit.WebResourceRequest
+import android.webkit.WebResourceResponse
+import android.webkit.WebView
+import android.webkit.WebViewClient
+import okhttp3.OkHttpClient
+import okhttp3.Request
+import org.koin.core.KoinComponent
+import org.koin.core.inject
+import org.koitharu.kotatsu.utils.ext.safe
+
+class BrowserClient(private val callback: BrowserCallback) : WebViewClient(), KoinComponent {
+
+	private val okHttp by inject<OkHttpClient>()
+
+	override fun onPageFinished(webView: WebView, url: String) {
+		super.onPageFinished(webView, url)
+		callback.onLoadingStateChanged(isLoading = false)
+	}
+
+	override fun onPageStarted(view: WebView?, url: String?, favicon: Bitmap?) {
+		super.onPageStarted(view, url, favicon)
+		callback.onLoadingStateChanged(isLoading = true)
+	}
+
+	override fun onPageCommitVisible(view: WebView, url: String?) {
+		super.onPageCommitVisible(view, url)
+		callback.onTitleChanged(view.title, url)
+	}
+
+	override fun shouldOverrideUrlLoading(view: WebView?, request: WebResourceRequest?) = false
+
+	override fun shouldOverrideUrlLoading(view: WebView, url: String) = false
+
+	override fun shouldInterceptRequest(view: WebView?, url: String?): WebResourceResponse? {
+		return url?.let(::doRequest)
+	}
+
+	override fun shouldInterceptRequest(view: WebView?, request: WebResourceRequest?): WebResourceResponse? {
+		return request?.url?.toString()?.let(::doRequest)
+	}
+
+	private fun doRequest(url: String): WebResourceResponse? = safe {
+		val request = Request.Builder()
+			.url(url)
+			.build()
+		val response = okHttp.newCall(request).execute()
+		val ct = response.body?.contentType()
+		WebResourceResponse(
+			"${ct?.type}/${ct?.subtype}",
+			ct?.charset()?.name() ?: "utf-8",
+			response.body?.byteStream()
+		)
+	}
+}

app/src/main/java/org/koitharu/kotatsu/ui/details/MangaDetailsActivity.kt

@@ -21,6 +21,7 @@ import org.koitharu.kotatsu.core.model.FavouriteCategory
 import org.koitharu.kotatsu.core.model.Manga
 import org.koitharu.kotatsu.core.model.MangaHistory
 import org.koitharu.kotatsu.core.model.MangaSource
+import org.koitharu.kotatsu.ui.browser.BrowserActivity
 import org.koitharu.kotatsu.ui.common.BaseActivity
 import org.koitharu.kotatsu.ui.download.DownloadService
 import org.koitharu.kotatsu.utils.ShareHelper
@@ -123,6 +124,12 @@ class MangaDetailsActivity : BaseActivity(), MangaDetailsView {
 			}
 			true
 		}
+		R.id.action_browser -> {
+			manga?.let {
+				startActivity(BrowserActivity.newIntent(this, it.url))
+			}
+			true
+		}
 		R.id.action_shortcut -> {
 			manga?.let {
 				lifecycleScope.launch {