Merge pull request #2717 from faisalcodes/master

Fixed #2670 : Timestamp click behaviour in the description.

app/src/main/AndroidManifest.xml

@@ -72,6 +72,7 @@
             android:name=".ui.activities.MainActivity"
             android:configChanges="screenSize|smallestScreenSize|screenLayout|orientation"
             android:exported="true"
+            android:launchMode="singleTask"
             android:screenOrientation="user"
             android:supportsPictureInPicture="true"
             android:windowSoftInputMode="adjustPan">

app/src/main/java/com/github/libretube/ui/activities/MainActivity.kt

@@ -189,16 +189,16 @@ class MainActivity : BaseActivity() {
         if (viewGroup == null || viewGroup.childCount == 0) return
 
         viewGroup.children.forEach {
-            (it as? ScrollView)?.let {
-                it.smoothScrollTo(0, 0)
+            (it as? ScrollView)?.let { scrollView ->
+                scrollView.smoothScrollTo(0, 0)
                 return
             }
-            (it as? NestedScrollView)?.let {
-                it.smoothScrollTo(0, 0)
+            (it as? NestedScrollView)?.let { scrollView ->
+                scrollView.smoothScrollTo(0, 0)
                 return
             }
-            (it as? RecyclerView)?.let {
-                it.smoothScrollToPosition(0)
+            (it as? RecyclerView)?.let { recyclerView ->
+                recyclerView.smoothScrollToPosition(0)
                 return
             }
             tryScrollToTop(it as? ViewGroup)
@@ -373,9 +373,9 @@ class MainActivity : BaseActivity() {
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N &&
             isInPictureInPictureMode
         ) {
-            moveTaskToBack(true)
-            intent?.addFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT)
-            startActivity(intent)
+            val nIntent = Intent(this, MainActivity::class.java)
+            nIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TOP)
+            startActivity(nIntent)
         }
 
         if (intent?.getBooleanExtra(IntentData.openAudioPlayer, false) == true) {

app/src/main/java/com/github/libretube/ui/fragments/PlayerFragment.kt

@@ -17,18 +17,21 @@ import android.os.Handler
 import android.os.Looper
 import android.os.PowerManager
 import android.text.format.DateUtils
+import android.text.method.LinkMovementMethod
 import android.text.util.Linkify
 import android.util.Base64
 import android.util.Log
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import android.widget.TextView
 import android.widget.Toast
 import androidx.annotation.RequiresApi
 import androidx.constraintlayout.motion.widget.MotionLayout
 import androidx.core.net.toUri
 import androidx.core.os.ConfigurationCompat
 import androidx.core.os.bundleOf
+import androidx.core.text.HtmlCompat
 import androidx.core.view.isVisible
 import androidx.fragment.app.activityViewModels
 import androidx.lifecycle.Lifecycle
@@ -75,7 +78,6 @@ import com.github.libretube.ui.dialogs.AddToPlaylistDialog
 import com.github.libretube.ui.dialogs.DownloadDialog
 import com.github.libretube.ui.dialogs.ShareDialog
 import com.github.libretube.ui.extensions.setAspectRatio
-import com.github.libretube.ui.extensions.setFormattedHtml
 import com.github.libretube.ui.extensions.setupSubscriptionButton
 import com.github.libretube.ui.interfaces.OnlinePlayerOptions
 import com.github.libretube.ui.models.CommentsViewModel
@@ -86,7 +88,9 @@ import com.github.libretube.ui.sheets.PlayingQueueSheet
 import com.github.libretube.util.BackgroundHelper
 import com.github.libretube.util.DashHelper
 import com.github.libretube.util.DataSaverMode
+import com.github.libretube.util.HtmlParser
 import com.github.libretube.util.ImageHelper
+import com.github.libretube.util.LinkHandler
 import com.github.libretube.util.NavigationHelper
 import com.github.libretube.util.NowPlayingNotification
 import com.github.libretube.util.PlayerHelper
@@ -997,14 +1001,7 @@ class PlayerFragment : BaseFragment(), OnlinePlayerOptions {
         // set video description
         val description = streams.description!!
 
-        // detect whether the description is html formatted
-        if (description.contains("<") && description.contains(">")) {
-            binding.playerDescription.setFormattedHtml(description)
-        } else {
-            // Links can be present as plain text
-            binding.playerDescription.autoLinkMask = Linkify.WEB_URLS
-            binding.playerDescription.text = description
-        }
+        setupDescription(binding.playerDescription, description)
 
         binding.playerChannel.setOnClickListener {
             val activity = view?.context as MainActivity
@@ -1038,6 +1035,53 @@ class PlayerFragment : BaseFragment(), OnlinePlayerOptions {
         }
     }
 
+    /**
+     * Set up the description text with video links and timestamps
+     */
+    private fun setupDescription(
+        descTextView: TextView,
+        description: String
+    ) {
+        // detect whether the description is html formatted
+        if (description.contains("<") && description.contains(">")) {
+            descTextView.movementMethod = LinkMovementMethod.getInstance()
+            descTextView.text = HtmlCompat.fromHtml(
+                description,
+                HtmlCompat.FROM_HTML_MODE_LEGACY,
+                null,
+                HtmlParser(LinkHandler { link -> handleLink(link) })
+            )
+        } else {
+            // Links can be present as plain text
+            descTextView.autoLinkMask = Linkify.WEB_URLS
+            descTextView.text = description
+        }
+    }
+
+    /**
+     * Handle a link clicked in the description
+     */
+    private fun handleLink(link: String) {
+        val uri = Uri.parse(link)
+        // get video id if the link is a valid youtube video link
+        val videoId = TextUtils.getVideoIdFromUri(link)
+        if (videoId.isNullOrEmpty()) {
+            // not a youtube video link, thus handle normally
+            val intent = Intent(Intent.ACTION_VIEW, uri)
+            startActivity(intent)
+        }
+        // check if the video is the current video and has a valid time
+        if (videoId == this.videoId) {
+            // try finding the time stamp of the url and seek to it if found
+            TextUtils.getTimeInSeconds(uri)?.let {
+                exoPlayer.seekTo(it * 1000)
+            }
+        } else {
+            // youtube video link without time or not the current video, thus open new player
+            playNextVideo(videoId)
+        }
+    }
+
     /**
      * Update the displayed duration of the video
      */

app/src/main/java/com/github/libretube/util/HtmlParser.kt

@@ -0,0 +1,85 @@
+package com.github.libretube.util
+
+import android.text.Editable
+import android.text.Html
+import org.xml.sax.Attributes
+import org.xml.sax.ContentHandler
+import org.xml.sax.Locator
+import org.xml.sax.XMLReader
+
+class HtmlParser(
+    private val handler: LinkHandler
+) : Html.TagHandler, ContentHandler {
+    private val tagStatus = ArrayDeque<Boolean>()
+    private var wrapped: ContentHandler? = null
+    private var text: Editable? = null
+    override fun handleTag(opening: Boolean, tag: String, output: Editable, xmlReader: XMLReader) {
+        if (wrapped == null) {
+            // record result object
+            text = output
+            // record current content handler
+            wrapped = xmlReader.contentHandler
+            // replace content handler with our own that forwards to calls to original when needed
+            xmlReader.contentHandler = this
+            // add false to the stack to make sure we always have a tag to pop
+            tagStatus.addLast(false)
+        }
+    }
+
+    override fun startElement(
+        uri: String,
+        localName: String,
+        qName: String,
+        attributes: Attributes
+    ) {
+        val isHandled = handler.handleTag(true, localName, text, attributes)
+        tagStatus.addLast(isHandled)
+
+        if (!isHandled) {
+            wrapped?.startElement(uri, localName, qName, attributes)
+        }
+    }
+
+    override fun endElement(uri: String, localName: String, qName: String) {
+        if (!tagStatus.removeLast()) {
+            wrapped?.endElement(uri, localName, qName)
+        }
+        handler.handleTag(false, localName, text, null)
+    }
+
+    override fun setDocumentLocator(locator: Locator) {
+        wrapped?.setDocumentLocator(locator)
+    }
+
+    override fun startDocument() {
+        wrapped?.startDocument()
+    }
+
+    override fun endDocument() {
+        wrapped?.endDocument()
+    }
+
+    override fun startPrefixMapping(prefix: String, uri: String) {
+        wrapped?.startPrefixMapping(prefix, uri)
+    }
+
+    override fun endPrefixMapping(prefix: String) {
+        wrapped?.endPrefixMapping(prefix)
+    }
+
+    override fun characters(ch: CharArray, start: Int, length: Int) {
+        wrapped?.characters(ch, start, length)
+    }
+
+    override fun ignorableWhitespace(ch: CharArray, start: Int, length: Int) {
+        wrapped?.ignorableWhitespace(ch, start, length)
+    }
+
+    override fun processingInstruction(target: String, data: String) {
+        wrapped?.processingInstruction(target, data)
+    }
+
+    override fun skippedEntity(name: String) {
+        wrapped?.skippedEntity(name)
+    }
+}

app/src/main/java/com/github/libretube/util/LinkHandler.kt

@@ -0,0 +1,54 @@
+package com.github.libretube.util
+
+import android.text.Editable
+import android.text.Spanned
+import android.text.TextPaint
+import android.text.style.ClickableSpan
+import android.view.View
+import org.xml.sax.Attributes
+
+class LinkHandler(
+    private val clickCallback: ((String) -> Unit)?
+) {
+    private var linkTagStartIndex = -1
+    private var link: String? = null
+    fun handleTag(
+        opening: Boolean,
+        tag: String?,
+        output: Editable?,
+        attributes: Attributes?
+    ): Boolean {
+        // if the tag is not an anchor link, ignore for the default handler
+        if (output == null || tag != "a") {
+            return false
+        }
+
+        if (opening && attributes != null) {
+            linkTagStartIndex = output.length
+            link = attributes.getValue("href")
+        } else if (!opening && linkTagStartIndex >= 0 && link != null) {
+            setLinkSpans(output, linkTagStartIndex, output.length, link!!)
+            linkTagStartIndex = -1
+            link = null
+        }
+        return true
+    }
+
+    private fun setLinkSpans(output: Editable, start: Int, end: Int, link: String) {
+        output.setSpan(
+            object : ClickableSpan() {
+                override fun onClick(widget: View) {
+                    clickCallback?.invoke(link)
+                }
+
+                override fun updateDrawState(ds: TextPaint) {
+                    super.updateDrawState(ds)
+                    ds.isUnderlineText = false
+                }
+            },
+            start,
+            end,
+            Spanned.SPAN_EXCLUSIVE_EXCLUSIVE
+        )
+    }
+}

app/src/main/java/com/github/libretube/util/TextUtils.kt

@@ -1,5 +1,6 @@
 package com.github.libretube.util
 
+import android.net.Uri
 import java.net.URL
 import java.time.LocalDate
 import java.time.format.DateTimeFormatter
@@ -52,4 +53,52 @@ object TextUtils {
         val formatter = DateTimeFormatter.ofLocalizedDate(FormatStyle.MEDIUM).withLocale(locale)
         return dateObj.format(formatter)
     }
+
+    /**
+     * Get time in seconds from a youtube video link
+     */
+    fun getTimeInSeconds(uri: Uri): Long? {
+        var time = uri.getQueryParameter("t") ?: return -1L
+
+        var timeInSeconds: Long? = null
+
+        // Find all spans containing hours, minutes or seconds
+        listOf(Pair("h", 60 * 60), Pair("m", 60), Pair("s", 1)).forEach { (separator, timeFactor) ->
+            if (time.contains(separator)) {
+                time.substringBefore(separator).toLongOrNull()?.let {
+                    timeInSeconds = (timeInSeconds ?: 0L) + it * timeFactor
+                    time = time.substringAfter(separator)
+                }
+            }
+        }
+
+        // Time may not contain h, m or s. In that case, it is just a number of seconds
+        if (timeInSeconds == null) {
+            time.toLongOrNull()?.let {
+                timeInSeconds = it
+            }
+        }
+
+        return timeInSeconds
+    }
+
+    /**
+     * Get video id if the link is a valid youtube video link
+     */
+    fun getVideoIdFromUri(link: String): String? {
+        val uri = Uri.parse(link)
+
+        if (link.contains("youtube.com")) {
+            // the link may be in an unsupported format, so we should try/catch it
+            return try {
+                uri.getQueryParameter("v")
+            } catch (e: Exception) {
+                null
+            }
+        } else if (link.contains("youtu.be")) {
+            return uri.lastPathSegment
+        }
+
+        return null
+    }
 }