Fix text alignment and bullet point formatting in PoliciesFragment

app/src/main/java/org/oppia/android/app/policies/PoliciesFragmentPresenter.kt

@@ -1,9 +1,5 @@
 package org.oppia.android.app.policies
 
-import android.graphics.Paint
-import android.text.SpannableString
-import android.text.Spanned
-import android.text.TextPaint
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
@@ -17,7 +13,6 @@ import org.oppia.android.databinding.PoliciesFragmentBinding
 import org.oppia.android.util.parser.html.HtmlParser
 import org.oppia.android.util.parser.html.PolicyType
 import javax.inject.Inject
-import org.oppia.android.util.locale.LeftAlignedSymbolsSpan
 
 /** The presenter for [PoliciesFragment]. */
 @FragmentScope
@@ -50,7 +45,6 @@ class PoliciesFragmentPresenter @Inject constructor(
     var policyDescription = ""
     var policyWebLink = ""
 
-    // Get policy content based on the selected policy page
     if (policyPage == PolicyPage.PRIVACY_POLICY) {
       policyDescription = resourceHandler.getStringInLocale(R.string.privacy_policy_content)
       policyWebLink = resourceHandler.getStringInLocale(R.string.privacy_policy_web_link)
@@ -59,49 +53,27 @@ class PoliciesFragmentPresenter @Inject constructor(
       policyWebLink = resourceHandler.getStringInLocale(R.string.terms_of_service_web_link)
     }
 
-    // Parse the policy description to handle HTML and links
-    val parsedHtmlDescription = htmlParserFactory.create(
+    binding.policyDescriptionTextView.textAlignment = View.TEXT_ALIGNMENT_TEXT_START
+    binding.policyDescriptionTextView.text = htmlParserFactory.create(
       policyOppiaTagActionListener = this,
-      displayLocale = resourceHandler.getDisplayLocale()
+      displayLocale = resourceHandler.getDisplayLocale(),
+      supportLtr = true
     ).parseOppiaHtml(
       policyDescription,
       binding.policyDescriptionTextView,
       supportsLinks = true,
       supportsConceptCards = false
     )
 
-    binding.policyDescriptionTextView.apply {
-      layoutDirection = View.LAYOUT_DIRECTION_LTR
-      textAlignment = View.TEXT_ALIGNMENT_TEXT_START
-      textDirection = View.TEXT_DIRECTION_LTR
-      setSingleLine(false)
-      setMaxLines(Int.MAX_VALUE)
-    }
-
-    val spannableString = SpannableString(parsedHtmlDescription)
-
-    parsedHtmlDescription.split("\n").forEachIndexed { lineIndex, line ->
-      val lineStart = parsedHtmlDescription.indexOf(line)
-      if (line.trimStart().startsWith("•")) {
-        val bulletIndex = lineStart + line.indexOf("•")
-        spannableString.setSpan(
-          LeftAlignedSymbolsSpan(),
-          bulletIndex,
-          bulletIndex + 1,
-          Spanned.SPAN_EXCLUSIVE_EXCLUSIVE
-        )
-      }
-    }
-
-    binding.policyDescriptionTextView.text = spannableString
-
+    binding.policyWebLinkTextView.textAlignment = View.TEXT_ALIGNMENT_TEXT_START
     binding.policyWebLinkTextView.text = htmlParserFactory.create(
       gcsResourceName = "",
       entityType = "",
       entityId = "",
       imageCenterAlign = false,
       customOppiaTagActionListener = null,
-      resourceHandler.getDisplayLocale()
+      resourceHandler.getDisplayLocale(),
+      supportLtr = true
     ).parseOppiaHtml(
       policyWebLink,
       binding.policyWebLinkTextView,
@@ -118,4 +90,4 @@ class PoliciesFragmentPresenter @Inject constructor(
         (activity as RouteToPoliciesListener).onRouteToPolicies(PolicyPage.TERMS_OF_SERVICE)
     }
   }
-}
+}

utility/src/main/java/org/oppia/android/util/parser/html/HtmlParser.kt

@@ -32,7 +32,8 @@ class HtmlParser private constructor(
   private val cacheLatexRendering: Boolean,
   customOppiaTagActionListener: CustomOppiaTagActionListener?,
   policyOppiaTagActionListener: PolicyOppiaTagActionListener?,
-  displayLocale: OppiaLocale.DisplayLocale
+  displayLocale: OppiaLocale.DisplayLocale,
+  private val supportLtr: Boolean = false
 ) {
   private val conceptCardTagHandler by lazy {
     ConceptCardTagHandler(
@@ -55,11 +56,11 @@ class HtmlParser private constructor(
       consoleLogger
     )
   }
-  private val bulletTagHandler by lazy { LiTagHandler(context, displayLocale) }
+  private val bulletTagHandler by lazy { LiTagHandler(context, displayLocale, supportLtr) }
   private val imageTagHandler by lazy { ImageTagHandler(consoleLogger) }
 
   private val isRtl by lazy {
-    displayLocale.getLayoutDirection() == ViewCompat.LAYOUT_DIRECTION_RTL
+    (displayLocale.getLayoutDirection() == ViewCompat.LAYOUT_DIRECTION_RTL) && !supportLtr
   }
 
   /**
@@ -78,6 +79,7 @@ class HtmlParser private constructor(
     supportsLinks: Boolean = false,
     supportsConceptCards: Boolean = false
   ): Spannable {
+
     var htmlContent = rawString
 
     // Canvas does not support RTL, it always starts from left to right in RTL due to which compound drawables are
@@ -123,17 +125,11 @@ class HtmlParser private constructor(
     }
 
     val imageGetter = urlImageParserFactory?.create(
-      htmlContentTextView,
-      gcsResourceName,
-      entityType,
-      entityId,
-      imageCenterAlign
+      htmlContentTextView, gcsResourceName, entityType, entityId, imageCenterAlign
     )
 
     val htmlSpannable = CustomHtmlContentHandler.fromHtml(
-      htmlContent,
-      imageGetter,
-      computeCustomTagHandlers(supportsConceptCards, htmlContentTextView)
+      htmlContent, imageGetter, computeCustomTagHandlers(supportsConceptCards, htmlContentTextView)
     )
 
     val urlPattern = Patterns.WEB_URL
@@ -228,43 +224,22 @@ class HtmlParser private constructor(
       entityId: String,
       imageCenterAlign: Boolean,
       customOppiaTagActionListener: CustomOppiaTagActionListener? = null,
-      displayLocale: OppiaLocale.DisplayLocale
+      displayLocale: OppiaLocale.DisplayLocale,
+      supportLtr: Boolean = false
     ): HtmlParser {
       return HtmlParser(
-        context = context,
-        urlImageParserFactory = urlImageParserFactory,
-        gcsResourceName = gcsResourceName,
-        entityType = entityType,
-        entityId = entityId,
-        imageCenterAlign = imageCenterAlign,
-        consoleLogger = consoleLogger,
-        cacheLatexRendering = enableCacheLatexRendering.value,
-        customOppiaTagActionListener = customOppiaTagActionListener,
-        policyOppiaTagActionListener = null,
-        displayLocale = displayLocale
-      )
-    }
-
-    /**
-     * Returns a new [HtmlParser] with the empty entity type and ID for loading images,
-     * doesn't require GCS properties and imageCenterAlign set to false
-     * optionally specified [CustomOppiaTagActionListener] for handling custom Oppia tag events.
-     */
-    fun create(
-      displayLocale: OppiaLocale.DisplayLocale
-    ): HtmlParser {
-      return HtmlParser(
-        context = context,
-        urlImageParserFactory = urlImageParserFactory,
-        gcsResourceName = "",
-        entityType = "",
-        entityId = "",
-        imageCenterAlign = false,
-        consoleLogger = consoleLogger,
+        context,
+        urlImageParserFactory,
+        gcsResourceName,
+        entityType,
+        entityId,
+        imageCenterAlign,
+        consoleLogger,
         cacheLatexRendering = enableCacheLatexRendering.value,
-        customOppiaTagActionListener = null,
-        policyOppiaTagActionListener = null,
-        displayLocale = displayLocale
+        customOppiaTagActionListener,
+        null,
+        displayLocale,
+        supportLtr = supportLtr
       )
     }
 
@@ -276,7 +251,9 @@ class HtmlParser private constructor(
      */
     fun create(
       policyOppiaTagActionListener: PolicyOppiaTagActionListener? = null,
-      displayLocale: OppiaLocale.DisplayLocale
+      displayLocale: OppiaLocale.DisplayLocale,
+      supportLtr: Boolean = false
+
     ): HtmlParser {
       return HtmlParser(
         context = context,
@@ -289,8 +266,9 @@ class HtmlParser private constructor(
         cacheLatexRendering = false,
         customOppiaTagActionListener = null,
         policyOppiaTagActionListener = policyOppiaTagActionListener,
-        displayLocale = displayLocale
+        displayLocale = displayLocale,
+        supportLtr = supportLtr
       )
     }
   }
-}
+}

utility/src/main/java/org/oppia/android/util/parser/html/LiTagHandler.kt

@@ -22,7 +22,8 @@ const val CUSTOM_LIST_OL_TAG = "oppia-ol"
  */
 class LiTagHandler(
   private val context: Context,
-  private val displayLocale: OppiaLocale.DisplayLocale
+  private val displayLocale: OppiaLocale.DisplayLocale,
+  private val supportLtr: Boolean = false
 ) : CustomHtmlContentHandler.CustomTagHandler {
   private val pendingLists = Stack<ListTag<*, *>>()
   private val latestPendingList: ListTag<*, *>?
@@ -52,7 +53,12 @@ class LiTagHandler(
         // Actually place the spans only if the root tree has been finished (as the entirety of the
         // tree is needed for analysis).
         val closingList = pendingLists.pop().also { it.recordList() }
-        if (pendingLists.isEmpty()) closingList.finishListTree(output, context, displayLocale)
+        if (pendingLists.isEmpty()) closingList.finishListTree(
+          output,
+          context,
+          displayLocale,
+          supportLtr
+        )
       }
       CUSTOM_LIST_LI_TAG -> latestPendingList?.closeItem(output)
     }
@@ -122,8 +128,13 @@ class LiTagHandler(
      * Recursively replaces all marks for this root list (and all its children) with renderable
      * spans in the provided [text].
      */
-    fun finishListTree(text: Editable, context: Context, displayLocale: OppiaLocale.DisplayLocale) =
-      finishListRecursively(parentSpan = null, text, context, displayLocale)
+    fun finishListTree(
+      text: Editable,
+      context: Context,
+      displayLocale: OppiaLocale.DisplayLocale,
+      supportLtr: Boolean
+    ) =
+      finishListRecursively(parentSpan = null, text, context, displayLocale, supportLtr)
 
     /**
      * Returns a new mark of type [M] for this tag.
@@ -136,22 +147,23 @@ class LiTagHandler(
       parentSpan: ListItemLeadingMarginSpan?,
       text: Editable,
       context: Context,
-      displayLocale: OppiaLocale.DisplayLocale
+      displayLocale: OppiaLocale.DisplayLocale,
+      supportLtr: Boolean = false
     ) {
       val childrenToProcess = childrenLists.toMutableMap()
       markRangesToReplace.forEach { (startMark, endMark) ->
         val styledSpan = startMark.toSpan(
-          parentSpan, context, displayLocale, peerItemCount = markRangesToReplace.size
+          parentSpan, context, displayLocale, peerItemCount = markRangesToReplace.size, supportLtr
         )
         text.replaceMarksWithSpan(startMark, endMark, styledSpan)
         childrenToProcess.remove(startMark)?.finishListRecursively(
-          parentSpan = styledSpan, text, context, displayLocale
+          parentSpan = styledSpan, text, context, displayLocale, supportLtr
         )
       }
 
       // Process the remaining children that are not lists themselves.
       childrenToProcess.values.forEach {
-        it.finishListRecursively(parentSpan = null, text, context, displayLocale)
+        it.finishListRecursively(parentSpan = null, text, context, displayLocale, supportLtr)
       }
     }
 
@@ -188,7 +200,8 @@ class LiTagHandler(
       parentSpan: ListItemLeadingMarginSpan?,
       context: Context,
       displayLocale: OppiaLocale.DisplayLocale,
-      peerItemCount: Int
+      peerItemCount: Int,
+      supportLtr: Boolean
     ): S
 
     /** Marks the opening tag location of a list item inside an <ul> element. */
@@ -202,8 +215,15 @@ class LiTagHandler(
         parentSpan: ListItemLeadingMarginSpan?,
         context: Context,
         displayLocale: OppiaLocale.DisplayLocale,
-        peerItemCount: Int
-      ) = ListItemLeadingMarginSpan.UlSpan(parentSpan, context, indentationLevel, displayLocale)
+        peerItemCount: Int,
+        supportLtr: Boolean
+      ) = ListItemLeadingMarginSpan.UlSpan(
+        parentSpan,
+        context,
+        indentationLevel,
+        displayLocale,
+        supportLtr
+      )
     }
 
     /** Marks the opening tag location of a list item inside an <ol> element. */
@@ -215,14 +235,16 @@ class LiTagHandler(
         parentSpan: ListItemLeadingMarginSpan?,
         context: Context,
         displayLocale: OppiaLocale.DisplayLocale,
-        peerItemCount: Int
+        peerItemCount: Int,
+        supportLtr: Boolean
       ): ListItemLeadingMarginSpan.OlSpan {
         return ListItemLeadingMarginSpan.OlSpan(
           parentSpan,
           context,
           numberedItemPrefix = "${displayLocale.toHumanReadableString(number)}.",
           longestNumberedItemPrefix = "${displayLocale.toHumanReadableString(peerItemCount)}.",
-          displayLocale
+          displayLocale,
+          supportLtr
         )
       }
     }
@@ -236,7 +258,8 @@ class LiTagHandler(
         parentSpan: ListItemLeadingMarginSpan?,
         context: Context,
         displayLocale: OppiaLocale.DisplayLocale,
-        peerItemCount: Int
+        peerItemCount: Int,
+        supportLtr: Boolean
       ) = error("Ending marks cannot be converted to spans.")
     }
   }
@@ -291,4 +314,4 @@ class LiTagHandler(
     private fun <T : Mark<*>> Spannable.addMark(mark: T) =
       setSpan(mark, length, length, Spanned.SPAN_MARK_MARK)
   }
-}
+}