Add support for search occurrences count and search navigation

pluto-plugins/base/lib/src/main/java/com/pluto/utilities/spannable/SpanUtil.kt

@@ -55,12 +55,15 @@ class Builder(val context: Context) {
         is String -> SpannableString(s).apply {
             setSpan(o, 0, length, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
         }
+
         is SpannableStringBuilder -> s.apply {
             setSpan(o, 0, length, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
         }
+
         is SpannableString -> s.apply {
             setSpan(o, 0, length, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
         }
+
         else -> throw IllegalArgumentException("unhandled type $o")
     }
 
@@ -92,14 +95,20 @@ class Builder(val context: Context) {
 
     fun highlight(span: CharSequence, search: String?): CharSequence {
         if (search.isNullOrEmpty()) return span
-        val normalizedText = Normalizer.normalize(span, Normalizer.Form.NFD)
-            .replace("\\p{InCombiningDiacriticalMarks}+".toRegex(), "")
-            .lowercase()
+        val normalizedText = span.normalise().lowercase()
 
         val startIndexes = normalizedText.allOccurrences(search)
         if (startIndexes.isNotEmpty()) {
+            return highlight(span, search, startIndexes)
+        }
+        return span
+    }
+
+    fun highlight(span: CharSequence, search: String?, indexes: List<Int>): CharSequence {
+        if (search.isNullOrEmpty()) return span
+        if (indexes.isNotEmpty()) {
             val highlighted: Spannable = SpannableString(span)
-            startIndexes.forEach {
+            indexes.forEach {
                 highlighted.setSpan(
                     BackgroundColorSpan(context.color(R.color.pluto___text_highlight)),
                     it,
@@ -112,6 +121,12 @@ class Builder(val context: Context) {
         return span
     }
 
+    fun occurrences(span: CharSequence, search: String?): List<Int> {
+        if (search.isNullOrEmpty()) return emptyList()
+        val normalizedText = span.normalise().lowercase()
+        return normalizedText.allOccurrences(search)
+    }
+
     fun clickable(span: CharSequence, listener: ClickableSpan): CharSequence {
         return span(span, listener)
     }
@@ -124,6 +139,11 @@ class Builder(val context: Context) {
         return span(span, StyleSpan(Typeface.ITALIC))
     }
 
+    private fun CharSequence.normalise(): String {
+        return Normalizer.normalize(this, Normalizer.Form.NFD)
+            .replace("\\p{InCombiningDiacriticalMarks}+".toRegex(), "")
+    }
+
     fun build(): CharSequence {
         return spanBuilder
     }

pluto-plugins/plugins/network/core/lib/src/main/java/com/pluto/plugins/network/internal/interceptor/ui/ContentFragment.kt

@@ -29,6 +29,9 @@ internal class ContentFragment : Fragment(R.layout.pluto_network___fragment_cont
     private val argumentData: ContentFormatterData?
         get() = arguments?.getParcelable(DATA)
 
+    private var currentHighlightIndex = 0
+    private var occurrences = emptyList<Int>()
+
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
         onBackPressed { handleBackPress() }
@@ -50,20 +53,33 @@ internal class ContentFragment : Fragment(R.layout.pluto_network___fragment_cont
         binding.editSearch.doOnTextChanged { text, _, _, _ ->
             viewLifecycleOwner.lifecycleScope.launchWhenResumed {
                 text?.toString()?.let { search ->
-                    argumentData?.let {
-                        binding.content.setSpan {
-                            append(highlight(it.content, search.trim()))
-                            append("\n")
-                        }
-                    }
-
-                    scrollToText(search.trim())
+                    processSearch(search)
                 }
             }
         }
+
+        binding.previousHighlight.setOnDebounceClickListener {
+            if (occurrences.isNotEmpty()) {
+                currentHighlightIndex = (currentHighlightIndex - 1 + occurrences.size) % occurrences.size
+                scrollToText(occurrences[currentHighlightIndex], binding.editSearch.text.toString())
+            }
+        }
+
+        binding.nextHighlight.setOnDebounceClickListener {
+            if (occurrences.isNotEmpty()) {
+                currentHighlightIndex = (currentHighlightIndex + 1) % occurrences.size
+                scrollToText(occurrences[currentHighlightIndex], binding.editSearch.text.toString())
+            }
+        }
+
         binding.share.setOnDebounceClickListener {
             argumentData?.let {
-                contentSharer.share(Shareable(title = "Share content", content = it.content.toString()))
+                contentSharer.share(
+                    Shareable(
+                        title = "Share content",
+                        content = it.content.toString()
+                    )
+                )
             }
         }
         argumentData?.let {
@@ -88,16 +104,34 @@ internal class ContentFragment : Fragment(R.layout.pluto_network___fragment_cont
         }
     }
 
+    private fun processSearch(search: String) {
+        currentHighlightIndex = 0
+        argumentData?.let {
+            binding.content.setSpan {
+                occurrences = occurrences(it.content, search.trim())
+                append(highlight(it.content, search.trim(), occurrences))
+                append("\n")
+                binding.searchCount.visibility = if (search.isEmpty()) View.GONE else VISIBLE
+                binding.searchCount.text = occurrences.size.toString()
+                val highlightsVisibility = if (occurrences.size < 2) View.GONE else VISIBLE
+                binding.previousHighlight.visibility = highlightsVisibility
+                binding.nextHighlight.visibility = highlightsVisibility
+            }
+        }
+
+        scrollToText(currentHighlightIndex, search.trim())
+    }
+
     /**
      * helps to auto scroll to target search
      */
-    private fun scrollToText(targetText: String) {
+    private fun scrollToText(startIndex: Int, targetText: String) {
         if (targetText.isEmpty()) {
             return
         }
 
         val contentText = binding.content.getText().toString().lowercase()
-        val index = contentText.indexOf(targetText.lowercase())
+        val index = contentText.indexOf(targetText.lowercase(), startIndex)
 
         if (index != -1) {
             binding.content.post {
@@ -108,7 +142,7 @@ internal class ContentFragment : Fragment(R.layout.pluto_network___fragment_cont
                     val y = layout.getLineTop(lineNumber)
 
                     binding.horizontalScroll.smoothScrollTo(x / 2, 0)
-                    binding.contentNestedScrollView.smoothScrollTo(0, y / 2)
+                    binding.contentNestedScrollView.smoothScrollTo(0, y)
                 }
             }
         }

pluto-plugins/plugins/network/core/lib/src/main/res/drawable/pluto_network___ic_arrow_down.xml

@@ -0,0 +1,11 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+
+    <path
+        android:fillColor="@color/pluto___dark_80"
+        android:pathData="M7.41,8.59L12,13.17l4.59,-4.58L18,10l-6,6 -6,-6 1.41,-1.41z" />
+
+</vector>

pluto-plugins/plugins/network/core/lib/src/main/res/drawable/pluto_network___ic_arrow_up.xml

@@ -0,0 +1,11 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+
+    <path
+        android:fillColor="@color/pluto___dark_80"
+        android:pathData="M7.41,15.41L12,10.83l4.59,4.58L18,14l-6,-6 -6,6z" />
+
+</vector>

pluto-plugins/plugins/network/core/lib/src/main/res/layout/pluto_network___fragment_content.xml

@@ -154,10 +154,57 @@
                     android:textColorHint="@color/pluto___text_dark_40"
                     android:textSize="@dimen/pluto___text_small"
                     app:layout_constraintBottom_toBottomOf="parent"
-                    app:layout_constraintEnd_toStartOf="@+id/clearSearch"
+                    app:layout_constraintEnd_toStartOf="@+id/nextHighlight"
                     app:layout_constraintStart_toEndOf="@+id/closeSearch"
                     app:layout_constraintTop_toTopOf="parent" />
 
+                <ImageView
+                    android:id="@+id/nextHighlight"
+                    android:layout_width="wrap_content"
+                    android:layout_height="0dp"
+                    android:contentDescription="@string/pluto_network___search_next_highlight"
+                    android:foreground="?android:attr/selectableItemBackground"
+                    android:paddingHorizontal="@dimen/pluto___margin_mini"
+                    android:src="@drawable/pluto_network___ic_arrow_down"
+                    android:visibility="gone"
+                    app:layout_constraintBottom_toBottomOf="parent"
+                    app:layout_constraintEnd_toStartOf="@id/previousHighlight"
+                    app:layout_constraintStart_toEndOf="@id/editSearch"
+                    app:layout_constraintTop_toTopOf="parent"
+                    tools:visibility="visible" />
+
+                <ImageView
+                    android:id="@+id/previousHighlight"
+                    android:layout_width="wrap_content"
+                    android:layout_height="0dp"
+                    android:contentDescription="@string/pluto_network___search_previous_highlight"
+                    android:foreground="?android:attr/selectableItemBackground"
+                    android:paddingHorizontal="@dimen/pluto___margin_mini"
+                    android:src="@drawable/pluto_network___ic_arrow_up"
+                    android:visibility="gone"
+                    app:layout_constraintBottom_toBottomOf="parent"
+                    app:layout_constraintEnd_toStartOf="@id/searchCount"
+                    app:layout_constraintStart_toEndOf="@id/nextHighlight"
+                    app:layout_constraintTop_toTopOf="parent"
+                    tools:visibility="visible" />
+
+                <TextView
+                    android:id="@+id/searchCount"
+                    android:layout_width="wrap_content"
+                    android:layout_height="0dp"
+                    android:fontFamily="@font/muli_semibold"
+                    android:gravity="center"
+                    android:paddingHorizontal="@dimen/pluto___margin_xsmall"
+                    android:textColor="@color/pluto___text_dark_40"
+                    android:textSize="@dimen/pluto___text_small"
+                    android:visibility="gone"
+                    app:layout_constraintBottom_toBottomOf="parent"
+                    app:layout_constraintEnd_toStartOf="@id/clearSearch"
+                    app:layout_constraintStart_toEndOf="@id/previousHighlight"
+                    app:layout_constraintTop_toTopOf="parent"
+                    tools:text="10"
+                    tools:visibility="visible" />
+
                 <ImageView
                     android:id="@+id/clearSearch"
                     android:layout_width="wrap_content"
@@ -167,6 +214,7 @@
                     android:paddingHorizontal="@dimen/pluto___margin_xsmall"
                     android:src="@drawable/pluto_network___ic_close_gray"
                     app:layout_constraintBottom_toBottomOf="parent"
+                    app:layout_constraintStart_toEndOf="@id/searchCount"
                     app:layout_constraintEnd_toEndOf="parent"
                     app:layout_constraintTop_toTopOf="parent" />
 

pluto-plugins/plugins/network/core/lib/src/main/res/values/strings.xml

@@ -94,4 +94,6 @@
         <item quantity="one">1 items</item>
         <item quantity="other">%d items</item>
     </plurals>
+    <string name="pluto_network___search_next_highlight">Next highlight</string>
+    <string name="pluto_network___search_previous_highlight">Previous highlight</string>
 </resources>