Take enabled boards into account when applying filters

Remove synchronizing by copying the Filters on the main thread.

Clover/app/src/main/java/org/floens/chan/core/manager/FilterEngine.java

@@ -130,7 +130,7 @@ public class FilterEngine {
     }
 
     /**
-     * Get all enabled filters, thread safe if locked on {@link #getEnabledFiltersLock()}.
+     * Get all enabled filters.
      *
      * @return List of enabled filters
      */
@@ -138,15 +138,6 @@ public class FilterEngine {
         return enabledFilters;
     }
 
-    /**
-     * Lock for usage of {@link #getEnabledFilters()}
-     *
-     * @return Object to call synchronized on
-     */
-    public Object getEnabledFiltersLock() {
-        return enabledFilters;
-    }
-
     public boolean matches(Filter filter, Post post) {
         // Post has not been finish()ed yet, account for invalid values
         String text = null;
@@ -179,16 +170,14 @@ public class FilterEngine {
         FilterType type = FilterType.forId(filter.type);
         if (type.isRegex) {
             Matcher matcher = null;
-            synchronized (filter.compiledMatcherLock) {
-                if (!forceCompile) {
-                    matcher = filter.compiledMatcher;
-                }
+            if (!forceCompile) {
+                matcher = filter.compiledMatcher;
+            }
 
-                if (matcher == null) {
-                    Pattern compiledPattern = compile(filter.pattern);
-                    matcher = filter.compiledMatcher = compiledPattern.matcher("");
-                    Logger.d(TAG, "Resulting pattern: " + filter.compiledMatcher);
-                }
+            if (matcher == null) {
+                Pattern compiledPattern = compile(filter.pattern);
+                matcher = filter.compiledMatcher = compiledPattern.matcher("");
+                Logger.d(TAG, "Resulting pattern: " + filter.compiledMatcher);
             }
 
             if (matcher != null) {

Clover/app/src/main/java/org/floens/chan/core/model/Filter.java

@@ -50,11 +50,8 @@ public class Filter {
     @DatabaseField(canBeNull = false)
     public int color;
 
-    public final Object compiledMatcherLock = new Object();
-
     /**
      * Cached version of {@link #pattern} compiled by {@link org.floens.chan.core.manager.FilterEngine#compile(String)}.
-     * Thread safe when synchronized on {@link #compiledMatcherLock}
      */
     public Matcher compiledMatcher;
 
@@ -67,4 +64,17 @@ public class Filter {
         action = filter.action;
         color = filter.color;
     }
+
+    public Filter copy() {
+        Filter copy = new Filter();
+        copy.id = id;
+        copy.enabled = enabled;
+        copy.type = type;
+        copy.pattern = pattern;
+        copy.allBoards = allBoards;
+        copy.boards = boards;
+        copy.action = action;
+        copy.color = color;
+        return copy;
+    }
 }

Clover/app/src/main/java/org/floens/chan/core/net/ChanReaderRequest.java

@@ -26,6 +26,7 @@ import org.floens.chan.Chan;
 import org.floens.chan.chan.ChanUrls;
 import org.floens.chan.core.database.DatabaseManager;
 import org.floens.chan.core.manager.FilterEngine;
+import org.floens.chan.core.model.Board;
 import org.floens.chan.core.model.Filter;
 import org.floens.chan.core.model.Loadable;
 import org.floens.chan.core.model.Post;
@@ -42,6 +43,7 @@ public class ChanReaderRequest extends JsonReaderRequest<ChanReaderRequest.ChanR
     private Post op;
     private FilterEngine filterEngine;
     private DatabaseManager databaseManager;
+    private List<Filter> filters;
 
     private ChanReaderRequest(String url, Listener<ChanReaderResponse> listener, ErrorListener errorListener) {
         super(url, listener, errorListener);
@@ -66,6 +68,17 @@ public class ChanReaderRequest extends JsonReaderRequest<ChanReaderRequest.ChanR
         request.loadable = loadable.copy();
         request.cached = new ArrayList<>(cached);
 
+        request.filters = new ArrayList<>();
+        for (Filter filter : request.filterEngine.getEnabledFilters()) {
+            List<Board> boards = request.filterEngine.getBoardsForFilter(filter);
+            for (Board board : boards) {
+                if (board.value.equals(loadable.board)) {
+                    request.filters.add(filter.copy());
+                    break;
+                }
+            }
+        }
+
         return request;
     }
 
@@ -344,28 +357,25 @@ public class ChanReaderRequest extends JsonReaderRequest<ChanReaderRequest.ChanR
     }
 
     private void processPostFilter(Post post) {
-        synchronized (filterEngine.getEnabledFiltersLock()) {
-            List<Filter> filters = filterEngine.getEnabledFilters();
-            int filterSize = filters.size();
-            for (int i = 0; i < filterSize; i++) {
-                Filter filter = filters.get(i);
-                if (filterEngine.matches(filter, post)) {
-                    FilterEngine.FilterAction action = FilterEngine.FilterAction.forId(filter.action);
-                    switch (action) {
-                        case COLOR:
-                            post.filterHighlightedColor = filter.color;
-                            break;
-                        case HIDE:
-                            if (!loadable.isThreadMode()) {
-                                post.filterStub = true;
-                            }
-                            break;
-                        case REMOVE:
-                            if (!loadable.isThreadMode()) {
-                                post.filterRemove = true;
-                            }
-                            break;
-                    }
+        int filterSize = filters.size();
+        for (int i = 0; i < filterSize; i++) {
+            Filter filter = filters.get(i);
+            if (filterEngine.matches(filter, post)) {
+                FilterEngine.FilterAction action = FilterEngine.FilterAction.forId(filter.action);
+                switch (action) {
+                    case COLOR:
+                        post.filterHighlightedColor = filter.color;
+                        break;
+                    case HIDE:
+                        if (!loadable.isThreadMode()) {
+                            post.filterStub = true;
+                        }
+                        break;
+                    case REMOVE:
+                        if (!loadable.isThreadMode()) {
+                            post.filterRemove = true;
+                        }
+                        break;
                 }
             }
         }