🚀 Images in Reader

* Added Images in Reader
* Alternative(caption) text below Image

Resolves: #69

app/src/main/java/ua/acclorite/book_story/data/parser/DocumentParser.kt

@@ -1,11 +1,16 @@
 package ua.acclorite.book_story.data.parser
 
+import android.graphics.Bitmap
+import android.graphics.BitmapFactory
+import androidx.compose.ui.graphics.asImageBitmap
 import kotlinx.coroutines.yield
 import org.jsoup.nodes.Document
 import ua.acclorite.book_story.domain.reader.ReaderText
 import ua.acclorite.book_story.presentation.core.util.clearAllMarkdown
 import ua.acclorite.book_story.presentation.core.util.clearMarkdown
 import ua.acclorite.book_story.presentation.core.util.containsVisibleText
+import java.util.zip.ZipEntry
+import java.util.zip.ZipFile
 import javax.inject.Inject
 
 class DocumentParser @Inject constructor(
@@ -18,7 +23,11 @@ class DocumentParser @Inject constructor(
      *
      * @return Parsed text line by line with Markdown(all lines are not blank).
      */
-    suspend fun Document.parseDocument(includeChapter: Boolean = true): List<ReaderText> {
+    suspend fun Document.parseDocument(
+        zipFile: ZipFile? = null,
+        imageEntries: List<ZipEntry>? = null,
+        includeChapter: Boolean = true
+    ): List<ReaderText> {
         yield()
 
         val readerText = mutableListOf<ReaderText>()
@@ -53,7 +62,26 @@ class DocumentParser @Inject constructor(
                 element.prepend("[")
                 element.append("]($link)")
             }
-        }.wholeText().lines().forEachIndexed { index, line ->
+
+            // Image
+            select("img").forEach { element ->
+                val src = element.attr("src")
+                    .trim()
+                    .substringAfterLast("/")
+                    .lowercase()
+                    .takeIf {
+                        it.containsVisibleText() && imageEntries?.any { image ->
+                            it == image.name.substringAfterLast('/').lowercase()
+                        } == true
+                    } ?: return@forEach
+
+                val alt = element.attr("alt").trim().takeIf {
+                    it.clearMarkdown().containsVisibleText()
+                } ?: src.substringBeforeLast(".")
+
+                element.append("\n[[$src|$alt]]\n")
+            }
+        }.wholeText().lines().forEach { line ->
             yield()
 
             val formattedLine = line.replace(
@@ -64,9 +92,54 @@ class DocumentParser @Inject constructor(
                 Regex("""_\s*(.*?)\s*_"""), "_$1_"
             ).trim()
 
+            val imageRegex = Regex("""\[\[(.*?)\|(.*?)]]""")
+
             if (line.containsVisibleText()) {
-                when (line) {
-                    "***", "---" -> readerText.add(ReaderText.Separator)
+                when {
+                    imageRegex.matches(line) -> {
+                        val trimmedLine = line.removeSurrounding("[[", "]]")
+                        val src = trimmedLine.substringBefore("|")
+                        val alt = "_${trimmedLine.substringAfter("|")}_"
+
+                        val image = try {
+                            val imageEntry = imageEntries?.find { image ->
+                                src == image.name.substringAfterLast('/').lowercase()
+                            } ?: return@forEach
+
+                            zipFile?.getInputStream(imageEntry)?.use { inputStream ->
+                                val options = BitmapFactory.Options().apply {
+                                    inSampleSize = 2
+                                    inPreferredConfig = Bitmap.Config.RGB_565
+                                }
+                                BitmapFactory.decodeStream(
+                                    /* is = */ inputStream,
+                                    /* outPadding = */ null,
+                                    /* opts = */ options
+                                )?.asImageBitmap()
+                            }
+                        } catch (e: Exception) {
+                            e.printStackTrace()
+                            return@forEach
+                        }
+
+                        if (image == null) return@forEach
+
+                        // Optimize
+                        image.prepareToDraw()
+
+                        readerText.add( // Adding image
+                            ReaderText.Image(
+                                imageBitmap = image
+                            )
+                        )
+                        readerText.add( // Adding alternative text (caption) for image
+                            ReaderText.Text(
+                                markdownParser.parse(alt)
+                            )
+                        )
+                    }
+
+                    line == "---" || line == "***" -> readerText.add(ReaderText.Separator)
 
                     else -> {
                         if (

app/src/main/java/ua/acclorite/book_story/data/parser/epub/EpubTextParser.kt

@@ -15,6 +15,8 @@ import org.jsoup.Jsoup
 import ua.acclorite.book_story.data.parser.DocumentParser
 import ua.acclorite.book_story.data.parser.TextParser
 import ua.acclorite.book_story.domain.reader.ReaderText
+import ua.acclorite.book_story.presentation.core.constants.Constants
+import ua.acclorite.book_story.presentation.core.constants.provideImageExtensions
 import ua.acclorite.book_story.presentation.core.util.addAll
 import ua.acclorite.book_story.presentation.core.util.containsVisibleText
 import java.io.File
@@ -50,6 +52,11 @@ class EpubTextParser @Inject constructor(
                     }
 
                     val chapterEntries = zip.getChapterEntries(opfEntry)
+                    val imageEntries = zip.entries().toList().filter {
+                        Constants.provideImageExtensions().any { format ->
+                            it.name.endsWith(format, ignoreCase = true)
+                        }
+                    }
                     val chapterTitleEntries = zip.getChapterTitleMapFromToc(tocEntry)
 
                     Log.i(EPUB_TAG, "TOC Entry: ${tocEntry?.name ?: "no toc.ncx"}")
@@ -59,6 +66,7 @@ class EpubTextParser @Inject constructor(
 
                     readerText = zip.parseEpub(
                         chapterEntries = chapterEntries,
+                        imageEntries = imageEntries,
                         chapterTitleEntries = chapterTitleEntries
                     )
                 }
@@ -94,6 +102,7 @@ class EpubTextParser @Inject constructor(
     @OptIn(ExperimentalCoroutinesApi::class)
     private suspend fun ZipFile.parseEpub(
         chapterEntries: List<ZipEntry>,
+        imageEntries: List<ZipEntry>,
         chapterTitleEntries: Map<Title, List<String>>?
     ): List<ReaderText> {
 
@@ -110,6 +119,7 @@ class EpubTextParser @Inject constructor(
                         zip = this@parseEpub,
                         index = index,
                         entry = entry,
+                        imageEntries = imageEntries,
                         chapterTitleMap = chapterTitleEntries
                     )
 
@@ -143,12 +153,17 @@ class EpubTextParser @Inject constructor(
         zip: ZipFile,
         index: Int,
         entry: ZipEntry,
+        imageEntries: List<ZipEntry>,
         chapterTitleMap: Map<Title, List<String>>?
     ) {
         // Getting all text
         val content = zip.getInputStream(entry).bufferedReader().use { it.readText() }
         var readerText = documentParser.run {
-            Jsoup.parse(content).parseDocument(includeChapter = false)
+            Jsoup.parse(content).parseDocument(
+                zipFile = zip,
+                imageEntries = imageEntries,
+                includeChapter = false
+            )
         }.toMutableList()
 
         // Adding chapter title from TOC if found

app/src/main/java/ua/acclorite/book_story/domain/reader/ReaderText.kt

@@ -1,6 +1,7 @@
 package ua.acclorite.book_story.domain.reader
 
 import androidx.compose.runtime.Immutable
+import androidx.compose.ui.graphics.ImageBitmap
 import androidx.compose.ui.text.AnnotatedString
 
 @Immutable
@@ -13,4 +14,9 @@ sealed class ReaderText {
 
     @Immutable
     data object Separator : ReaderText()
+
+    @Immutable
+    data class Image(
+        val imageBitmap: ImageBitmap
+    ) : ReaderText()
 }

app/src/main/java/ua/acclorite/book_story/presentation/core/constants/SupportedExtensionConstants.kt

@@ -10,3 +10,9 @@ fun Constants.provideExtensions() = listOf(
     ".htm",
     ".md"
 )
+
+fun Constants.provideImageExtensions() = listOf(
+    ".png",
+    ".jpg",
+    ".jpeg"
+)

app/src/main/java/ua/acclorite/book_story/presentation/reader/ReaderLayout.kt

@@ -156,7 +156,7 @@ fun ReaderLayout(
                 ReaderLayoutText(
                     activity = activity,
                     showMenu = showMenu,
-                    textEntry = textEntry,
+                    entry = textEntry,
                     fontFamily = fontFamily,
                     fontColor = fontColor,
                     lineHeight = lineHeight,

app/src/main/java/ua/acclorite/book_story/presentation/reader/ReaderLayoutText.kt

@@ -18,7 +18,7 @@ import ua.acclorite.book_story.ui.reader.ReaderEvent
 fun LazyItemScope.ReaderLayoutText(
     activity: ComponentActivity,
     showMenu: Boolean,
-    textEntry: ReaderText,
+    entry: ReaderText,
     fontFamily: FontWithName,
     fontColor: Color,
     lineHeight: TextUnit,
@@ -38,7 +38,14 @@ fun LazyItemScope.ReaderLayoutText(
     openTranslator: (ReaderEvent.OnOpenTranslator) -> Unit,
     menuVisibility: (ReaderEvent.OnMenuVisibility) -> Unit
 ) {
-    when (textEntry) {
+    when (entry) {
+        is ReaderText.Image -> {
+            ReaderLayoutTextImage(
+                entry = entry,
+                sidePadding = sidePadding
+            )
+        }
+
         is ReaderText.Separator -> {
             ReaderLayoutTextSeparator(
                 sidePadding = sidePadding,
@@ -48,7 +55,7 @@ fun LazyItemScope.ReaderLayoutText(
 
         is ReaderText.Chapter -> {
             ReaderLayoutTextChapter(
-                chapter = textEntry,
+                chapter = entry,
                 chapterTitleAlignment = chapterTitleAlignment,
                 fontColor = fontColor,
                 sidePadding = sidePadding,
@@ -59,7 +66,7 @@ fun LazyItemScope.ReaderLayoutText(
 
         is ReaderText.Text -> {
             ReaderLayoutTextParagraph(
-                paragraph = textEntry,
+                paragraph = entry,
                 activity = activity,
                 showMenu = showMenu,
                 fontFamily = fontFamily,

app/src/main/java/ua/acclorite/book_story/presentation/reader/ReaderLayoutTextImage.kt

@@ -0,0 +1,30 @@
+package ua.acclorite.book_story.presentation.reader
+
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyItemScope
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.layout.ContentScale
+import androidx.compose.ui.unit.Dp
+import ua.acclorite.book_story.domain.reader.ReaderText
+
+@Composable
+fun LazyItemScope.ReaderLayoutTextImage(
+    entry: ReaderText.Image,
+    sidePadding: Dp
+) {
+    Image(
+        modifier = Modifier
+            .animateItem(
+                fadeInSpec = null,
+                fadeOutSpec = null
+            )
+            .padding(horizontal = sidePadding)
+            .fillMaxWidth(),
+        bitmap = entry.imageBitmap,
+        contentDescription = null,
+        contentScale = ContentScale.FillWidth
+    )
+}