Start a genre search for tags while in browse or recents

Using the logic for browse from upstream, but also adding in a contains check in case the tag fails [such as tapping "Japanese" when the filter item has "Japanese (Manga)"]

Closes #960

Co-Authored-By: arkon <4098258+arkon@users.noreply.github.com>

app/src/main/java/eu/kanade/tachiyomi/ui/main/MainActivity.kt

@@ -733,6 +733,10 @@ open class MainActivity : BaseActivity<MainActivityBinding>(), DownloadServiceLi
         nav.selectedItemId = startingTab()
     }
 
+    fun goToTab(@IdRes id: Int) {
+        nav.selectedItemId = id
+    }
+
     private fun setRoot(controller: Controller, id: Int) {
         router.setRoot(controller.withFadeTransaction().tag(id.toString()))
     }

app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaDetailsController.kt

@@ -71,8 +71,10 @@ import eu.kanade.tachiyomi.ui.manga.track.TrackItem
 import eu.kanade.tachiyomi.ui.manga.track.TrackingBottomSheet
 import eu.kanade.tachiyomi.ui.migration.manga.design.PreMigrationController
 import eu.kanade.tachiyomi.ui.reader.ReaderActivity
+import eu.kanade.tachiyomi.ui.recents.RecentsController
 import eu.kanade.tachiyomi.ui.security.SecureActivityDelegate
 import eu.kanade.tachiyomi.ui.source.BrowseController
+import eu.kanade.tachiyomi.ui.source.browse.BrowseSourceController
 import eu.kanade.tachiyomi.ui.source.global_search.GlobalSearchController
 import eu.kanade.tachiyomi.ui.webview.WebViewActivity
 import eu.kanade.tachiyomi.util.addOrRemoveToFavorites
@@ -1137,10 +1139,29 @@ class MangaDetailsController :
     }
 
     override fun tagClicked(text: String) {
-        val firstController = router.backstack.first()?.controller
-        if (firstController is LibraryController && router.backstack.size == 2) {
+        if (router.backstackSize < 2) {
+            return
+        }
+
+        when (val previousController = router.backstack[router.backstackSize - 2].controller) {
+            is LibraryController -> {
                 router.handleBack()
-            firstController.search(text)
+                previousController.search(text)
+            }
+            is RecentsController -> {
+                // Manually navigate to LibraryController
+                router.handleBack()
+                (activity as? MainActivity)?.goToTab(R.id.nav_library)
+                val controller =
+                    router.getControllerWithTag(R.id.nav_library.toString()) as LibraryController
+                controller.search(text)
+            }
+            is BrowseSourceController -> {
+                if (presenter.source is HttpSource) {
+                    router.handleBack()
+                    previousController.searchWithGenre(text)
+                }
+            }
         }
     }
 

app/src/main/java/eu/kanade/tachiyomi/ui/source/browse/BrowseSourceController.kt

@@ -109,6 +109,9 @@ open class BrowseSourceController(bundle: Bundle) :
      */
     private var progressItem: ProgressItem? = null
 
+    /** Current filter sheet */
+    var filterSheet: SourceFilterSheet? = null
+
     init {
         setHasOptionsMenu(true)
     }
@@ -290,7 +293,9 @@ open class BrowseSourceController(bundle: Bundle) :
     }
 
     private fun showFilters() {
+        if (filterSheet != null) return
         val sheet = SourceFilterSheet(activity!!)
+        filterSheet = sheet
         sheet.setFilters(presenter.filterItems)
         presenter.filtersChanged = false
         val oldFilters = mutableListOf<Any?>()
@@ -340,9 +345,73 @@ open class BrowseSourceController(bundle: Bundle) :
             presenter.sourceFilters = newFilters
             sheet.setFilters(presenter.filterItems)
         }
+        sheet.setOnDismissListener {
+            filterSheet = null
+        }
+        sheet.setOnCancelListener {
+            filterSheet = null
+        }
         sheet.show()
     }
 
+    /**
+     * Attempts to restart the request with a new genre-filtered query.
+     * If the genre name can't be found the filters,
+     * the standard searchWithQuery search method is used instead.
+     *
+     * @param genreName the name of the genre
+     */
+    fun searchWithGenre(genreName: String, useContains: Boolean = false) {
+        presenter.sourceFilters = presenter.source.getFilterList()
+
+        var filterList: FilterList? = null
+
+        filter@ for (sourceFilter in presenter.sourceFilters) {
+            if (sourceFilter is Filter.Group<*>) {
+                for (filter in sourceFilter.state) {
+                    if (filter is Filter<*> &&
+                        if (useContains) filter.name.contains(genreName, true)
+                        else filter.name.equals(genreName, true)
+                    ) {
+                        when (filter) {
+                            is Filter.TriState -> filter.state = 1
+                            is Filter.CheckBox -> filter.state = true
+                        }
+                        filterList = presenter.sourceFilters
+                        break@filter
+                    }
+                }
+            } else if (sourceFilter is Filter.Select<*>) {
+                val index = sourceFilter.values.filterIsInstance<String>()
+                    .indexOfFirst {
+                        if (useContains) it.contains(genreName, true)
+                        else it.equals(genreName, true)
+                    }
+
+                if (index != -1) {
+                    sourceFilter.state = index
+                    filterList = presenter.sourceFilters
+                    break
+                }
+            }
+        }
+
+        if (filterList != null) {
+            filterSheet?.setFilters(presenter.filterItems)
+
+            showProgressBar()
+
+            adapter?.clear()
+            presenter.restartPager("", filterList)
+        } else {
+            if (!useContains) {
+                searchWithGenre(genreName, true)
+                return
+            }
+            searchWithQuery(genreName)
+        }
+    }
+
     private fun openInWebView() {
         val source = presenter.source as? HttpSource ?: return
         val activity = activity ?: return