Mapsforge themes compatibility improvements #100, fix #392

vtm-android-example/src/org/oscim/android/filepicker/ValidRenderTheme.java

@@ -1,6 +1,6 @@
 /*
  * Copyright 2010, 2011, 2012 mapsforge.org
- * Copyright 2016 devemux86
+ * Copyright 2016-2017 devemux86
  * Copyright 2017 Longri
  *
  * This program is free software: you can redistribute it and/or modify it under the
@@ -27,7 +27,6 @@ import org.xml.sax.XMLReader;
 import org.xml.sax.helpers.DefaultHandler;
 
 import java.io.File;
-import java.io.FileInputStream;
 
 import javax.xml.parsers.SAXParserFactory;
 
@@ -43,7 +42,7 @@ public final class ValidRenderTheme implements ValidFileFilter {
         try {
             ThemeFile theme = new ExternalRenderTheme(file.getAbsolutePath());
             DefaultHandler renderThemeHandler;
-            if (ThemeUtils.isMapsforgeTheme(new FileInputStream(file)))
+            if (ThemeUtils.isMapsforgeTheme(theme))
                 renderThemeHandler = new XmlMapsforgeThemeBuilder(theme);
             else
                 renderThemeHandler = new XmlThemeBuilder(theme);

vtm-android-example/src/org/oscim/android/test/MapsforgeStyleActivity.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016 devemux86
+ * Copyright 2016-2017 devemux86
  *
  * This program is free software: you can redistribute it and/or modify it under the
  * terms of the GNU Lesser General Public License as published by the Free Software
@@ -58,7 +58,7 @@ public class MapsforgeStyleActivity extends MapsforgeMapActivity {
 
     @Override
     protected void loadTheme(final String styleId) {
-        mMap.setTheme(new AssetsRenderTheme(this, "", "vtm/stylemenu.xml", new XmlRenderThemeMenuCallback() {
+        mMap.setTheme(new AssetsRenderTheme(getAssets(), "", "vtm/stylemenu.xml", new XmlRenderThemeMenuCallback() {
             @Override
             public Set<String> getCategories(XmlRenderThemeStyleMenu renderThemeStyleMenu) {
                 // Use the selected style or the default

vtm-android/src/org/oscim/android/theme/AssetsRenderTheme.java

@@ -15,7 +15,7 @@
  */
 package org.oscim.android.theme;
 
-import android.content.Context;
+import android.content.res.AssetManager;
 import android.text.TextUtils;
 
 import org.oscim.theme.IRenderTheme.ThemeException;
@@ -33,36 +33,33 @@ import java.io.InputStream;
 public class AssetsRenderTheme implements ThemeFile {
     private static final long serialVersionUID = 1L;
 
-    private final InputStream mInputStream;
+    private final AssetManager mAssetManager;
+    private final String mFileName;
     private XmlRenderThemeMenuCallback mMenuCallback;
     private final String mRelativePathPrefix;
 
     /**
-     * @param context            the Android context.
+     * @param assetManager       the Android asset manager.
      * @param relativePathPrefix the prefix for all relative resource paths.
      * @param fileName           the path to the XML render theme file.
      * @throws ThemeException if an error occurs while reading the render theme XML.
      */
-    public AssetsRenderTheme(Context context, String relativePathPrefix, String fileName) throws ThemeException {
+    public AssetsRenderTheme(AssetManager assetManager, String relativePathPrefix, String fileName) throws ThemeException {
-        this(context, relativePathPrefix, fileName, null);
+        this(assetManager, relativePathPrefix, fileName, null);
     }
 
     /**
-     * @param context            the Android context.
+     * @param assetManager       the Android asset manager.
      * @param relativePathPrefix the prefix for all relative resource paths.
      * @param fileName           the path to the XML render theme file.
      * @param menuCallback       the interface callback to create a settings menu on the fly.
      * @throws ThemeException if an error occurs while reading the render theme XML.
      */
-    public AssetsRenderTheme(Context context, String relativePathPrefix, String fileName, XmlRenderThemeMenuCallback menuCallback) throws ThemeException {
+    public AssetsRenderTheme(AssetManager assetManager, String relativePathPrefix, String fileName, XmlRenderThemeMenuCallback menuCallback) throws ThemeException {
+        mAssetManager = assetManager;
         mRelativePathPrefix = relativePathPrefix;
+        mFileName = fileName;
         mMenuCallback = menuCallback;
-
-        try {
-            mInputStream = context.getAssets().open((TextUtils.isEmpty(mRelativePathPrefix) ? "" : mRelativePathPrefix) + fileName);
-        } catch (IOException e) {
-            throw new ThemeException(e.getMessage());
-        }
     }
 
     @Override
@@ -73,7 +70,7 @@ public class AssetsRenderTheme implements ThemeFile {
             return false;
         }
         AssetsRenderTheme other = (AssetsRenderTheme) obj;
-        if (mInputStream != other.mInputStream) {
+        if (getRenderThemeAsStream() != other.getRenderThemeAsStream()) {
             return false;
         }
         if (!Utils.equals(mRelativePathPrefix, other.mRelativePathPrefix)) {
@@ -94,7 +91,11 @@ public class AssetsRenderTheme implements ThemeFile {
 
     @Override
     public InputStream getRenderThemeAsStream() throws ThemeException {
-        return mInputStream;
+        try {
+            return mAssetManager.open((TextUtils.isEmpty(mRelativePathPrefix) ? "" : mRelativePathPrefix) + mFileName);
+        } catch (IOException e) {
+            throw new ThemeException(e.getMessage());
+        }
     }
 
     @Override

vtm/src/org/oscim/theme/StreamRenderTheme.java

@@ -17,6 +17,8 @@ package org.oscim.theme;
 import org.oscim.theme.IRenderTheme.ThemeException;
 import org.oscim.utils.Utils;
 
+import java.io.BufferedInputStream;
+import java.io.IOException;
 import java.io.InputStream;
 
 /**
@@ -45,7 +47,8 @@ public class StreamRenderTheme implements ThemeFile {
      */
     public StreamRenderTheme(String relativePathPrefix, InputStream inputStream, XmlRenderThemeMenuCallback menuCallback) {
         mRelativePathPrefix = relativePathPrefix;
-        mInputStream = inputStream;
+        mInputStream = new BufferedInputStream(inputStream);
+        mInputStream.mark(0);
         mMenuCallback = menuCallback;
     }
 
@@ -78,6 +81,11 @@ public class StreamRenderTheme implements ThemeFile {
 
     @Override
     public InputStream getRenderThemeAsStream() throws ThemeException {
+        try {
+            mInputStream.reset();
+        } catch (IOException e) {
+            throw new ThemeException(e.getMessage());
+        }
         return mInputStream;
     }
 

vtm/src/org/oscim/theme/ThemeLoader.java

@@ -48,7 +48,7 @@ public class ThemeLoader {
 
     public static IRenderTheme load(ThemeFile theme, ThemeCallback themeCallback) throws ThemeException {
         IRenderTheme t;
-        if (ThemeUtils.isMapsforgeTheme(theme.getRenderThemeAsStream()))
+        if (ThemeUtils.isMapsforgeTheme(theme))
             t = USE_ATLAS ? XmlMapsforgeAtlasThemeBuilder.read(theme, themeCallback) : XmlMapsforgeThemeBuilder.read(theme, themeCallback);
         else
             t = USE_ATLAS ? XmlAtlasThemeBuilder.read(theme, themeCallback) : XmlThemeBuilder.read(theme, themeCallback);

vtm/src/org/oscim/theme/ThemeUtils.java

@@ -15,20 +15,15 @@
  */
 package org.oscim.theme;
 
-import org.oscim.utils.IOUtils;
+import org.oscim.backend.XMLReaderAdapter;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.xml.sax.Attributes;
-import org.xml.sax.InputSource;
 import org.xml.sax.SAXException;
-import org.xml.sax.XMLReader;
 import org.xml.sax.helpers.DefaultHandler;
 
-import java.io.InputStream;
 import java.util.concurrent.atomic.AtomicBoolean;
 
-import javax.xml.parsers.SAXParserFactory;
-
 /**
  * A utility class with theme specific helper methods.
  */
@@ -37,25 +32,21 @@ public final class ThemeUtils {
     private static final Logger log = LoggerFactory.getLogger(ThemeUtils.class);
 
     /**
-     * Check if the given InputStream is a Mapsforge render theme.
+     * Check if the given theme is a Mapsforge one.
      */
-    public static boolean isMapsforgeTheme(InputStream is) {
+    public static boolean isMapsforgeTheme(ThemeFile theme) {
         try {
             final AtomicBoolean isMapsforgeTheme = new AtomicBoolean(false);
-            SAXParserFactory factory = SAXParserFactory.newInstance();
-            factory.setNamespaceAware(true);
-            XMLReader xmlReader = factory.newSAXParser().getXMLReader();
-            xmlReader.setContentHandler(new DefaultHandler() {
-                public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
-                    if (localName.equals("rendertheme")) {
-                        isMapsforgeTheme.set(uri.equals("http://mapsforge.org/renderTheme"));
-                        // We have all info, break parsing
-                        throw new SAXTerminationException();
-                    }
-                }
-            });
             try {
-                xmlReader.parse(new InputSource(is));
+                new XMLReaderAdapter().parse(new DefaultHandler() {
+                    public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
+                        if (localName.equals("rendertheme")) {
+                            isMapsforgeTheme.set(uri.equals("http://mapsforge.org/renderTheme"));
+                            // We have all info, break parsing
+                            throw new SAXTerminationException();
+                        }
+                    }
+                }, theme.getRenderThemeAsStream());
             } catch (SAXTerminationException e) {
                 // Do nothing
             }
@@ -63,8 +54,6 @@ public final class ThemeUtils {
         } catch (Exception e) {
             log.error(e.getMessage(), e);
             return false;
-        } finally {
-            IOUtils.closeQuietly(is);
         }
     }