latisbooks: add text pages for accompanying text (#11102)

Not all pages have accompanying text, but it's nice to be able to see
the text when there is some. Examples are `No Comic (03/14/22)` and
`Meidri (Interspecies Reviewers)`
This is done in a nearly identical way to the xkcd source's alt-text
pages, with nearly identical code.
Also handle the extremely rare case where there are multiple images for
the same page. The only instance I can recall is `Page 23+24`

src/en/latisbooks/build.gradle

@@ -5,7 +5,7 @@ ext {
     extName = 'Latis Books'
     pkgNameSuffix = 'en.latisbooks'
     extClass = '.Latisbooks'
-    extVersionCode = 2
+    extVersionCode = 3
     isNsfw = true
 }
 

src/en/latisbooks/src/eu/kanade/tachiyomi/extension/en/latisbooks/Latisbooks.kt

@@ -1,5 +1,6 @@
 package eu.kanade.tachiyomi.extension.en.latisbooks
 
+import android.net.Uri.encode
 import eu.kanade.tachiyomi.network.GET
 import eu.kanade.tachiyomi.network.asObservableSuccess
 import eu.kanade.tachiyomi.source.model.FilterList
@@ -27,6 +28,10 @@ class Latisbooks : HttpSource() {
 
     override val client: OkHttpClient = network.cloudflareClient
 
+    private val textToImageURL = "https://fakeimg.pl/1500x2126/ffffff/000000/?font=museo&font_size=42"
+
+    private fun String.image() = textToImageURL + "&text=" + encode(this)
+
     private fun createManga(response: Response): SManga {
         return SManga.create().apply {
             initialized = true
@@ -97,15 +102,45 @@ class Latisbooks : HttpSource() {
 
     // Pages
 
-    override fun fetchPageList(chapter: SChapter): Observable<List<Page>> {
-        return Observable.just(listOf(Page(0, chapter.url)))
+    // Adapted from the xkcd source's wordWrap function
+    private fun wordWrap(text: String) = buildString {
+        var charCount = 0
+        text.replace("\r\n", " ").split(' ').forEach { w ->
+            if (charCount > 25) {
+                append("\n")
+                charCount = 0
+            }
+            append(w).append(' ')
+            charCount += w.length + 1
+        }
     }
 
-    override fun pageListParse(response: Response): List<Page> = throw UnsupportedOperationException("Not used")
+    override fun pageListRequest(chapter: SChapter): Request = GET(chapter.url, headers)
 
-    override fun imageUrlParse(response: Response): String {
-        return response.asJsoup().select("div.content-wrapper img.thumb-image").attr("abs:data-src")
+    override fun pageListParse(response: Response): List<Page> {
+        val blocks = response.asJsoup().select("div.content-wrapper div.row div.col")
+
+        // Handle multiple images per page (e.g. Page 23+24)
+        val pages = blocks.select("img.thumb-image")
+            .mapIndexed { i, it -> Page(i, it.attr("abs:data-src")) }
+            .toMutableList()
+
+        val numImages = pages.size
+
+        // Add text above/below the image as xkcd-esque text pages after the image itself
+        pages.addAll(
+            blocks.select("div.html-block")
+                .map { it.select("div.sqs-block-content").first() }
+                // Some pages have empty html blocks (e.g. Page 1), so ignore them
+                .filter { it.childrenSize() > 0 }
+                .mapIndexed { i, it -> Page(i + numImages, wordWrap(it.text()).image()) }
+                .toList()
+        )
+
+        return pages.toList()
     }
 
+    override fun imageUrlParse(response: Response): String = throw UnsupportedOperationException("Not used")
+
     override fun getFilterList() = FilterList()
 }