git-svn-id: https://only.mawhrin.net/repos/FBReaderJ/trunk@1566 6a642e6f-84f6-412e-ac94-c4a38d5a04b0

src/org/geometerplus/fbreader/formats/fb2/FB2CoverReader.java

@@ -0,0 +1,122 @@
+/*
+ * Copyright (C) 2010 Geometer Plus <contact@geometerplus.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+package org.geometerplus.fbreader.formats.fb2;
+
+import java.util.*;
+
+import org.geometerplus.zlibrary.core.filesystem.ZLFile;
+import org.geometerplus.zlibrary.core.image.ZLImage;
+import org.geometerplus.zlibrary.core.xml.*;
+
+import org.geometerplus.fbreader.constants.XMLNamespace;
+
+
+public class FB2CoverReader extends ZLXMLReaderAdapter {
+
+	private boolean myReadCoverPage;
+	private String myImageReference;
+	private Base64EncodedImage myImage;
+
+
+	public ZLImage readCover(ZLFile file) {
+		myReadCoverPage = false;
+		myImageReference = null;
+		read(file);
+		return myImage;
+	}
+
+
+	private String myXLinkPrefix;
+
+	@Override
+	public boolean processNamespaces() {
+		return true;
+	}
+
+	public void namespaceMapChangedHandler(HashMap<String,String> namespaceMap) {
+		myXLinkPrefix = null;
+		for (Map.Entry<String,String> entry : namespaceMap.entrySet()) {
+			if (XMLNamespace.XLink.equals(entry.getValue())) {
+				myXLinkPrefix = entry.getKey() + ":";
+				break;
+			}
+		}
+	}
+
+
+	@Override
+	public boolean startElementHandler(String tagName, ZLStringMap attributes) {
+		switch (FB2Tag.getTagByName(tagName)) {
+		case FB2Tag.COVERPAGE:
+			myReadCoverPage = true;
+			break;
+		case FB2Tag.IMAGE:
+			if (myReadCoverPage) {
+				if (myXLinkPrefix == null) {
+					break;
+				}
+				final String href = attributes.getValue((myXLinkPrefix + "href").intern());
+				if (href != null && href.length() > 1 && href.charAt(0) == '#') {
+					myImageReference = href.substring(1);
+				}
+			}
+			break;
+		case FB2Tag.BINARY:
+			if (myImageReference != null) {
+				final String id = attributes.getValue("id");
+				final String contentType = attributes.getValue("content-type");
+				if (id != null && contentType != null && myImageReference.equals(id)) {
+					// FIXME: make different Base64EncodedImage constructor to use another cache for covers
+					myImage = new Base64EncodedImage((contentType != null) ? contentType : "image/auto");
+				}
+			}
+			break;
+		}
+		return false;
+	}
+
+	@Override
+	public boolean endElementHandler(String tag) {
+		switch (FB2Tag.getTagByName(tag)) {
+		case FB2Tag.COVERPAGE:
+			myReadCoverPage = false;
+			break;
+		case FB2Tag.DESCRIPTION:
+			if (myImageReference == null) {
+				return true;
+			}
+			break;
+		case FB2Tag.BINARY:
+			if (myImage != null) {
+				myImage.close();
+				return true;
+			}
+			break;
+		}	
+		return false;
+	}
+
+	@Override
+	public void characterDataHandler(char[] data, int start, int length) {
+		if (length > 0 && myImage != null) {
+			myImage.addData(data, start, length);
+		}
+	}
+}

src/org/geometerplus/fbreader/formats/fb2/FB2Plugin.java

@@ -43,7 +43,6 @@ public class FB2Plugin extends FormatPlugin {
 
 	@Override
 	public ZLImage readCover(Book book) {
-		// TODO: implement
-		return null;
+		return new FB2CoverReader().readCover(book.File);
 	}
 }

src/org/geometerplus/fbreader/formats/fb2/FB2Tag.java

@@ -59,6 +59,8 @@ final class FB2Tag {
 	public static final byte SEQUENCE = 33;
 	public static final byte GENRE = 34;
 
+	public static final byte DESCRIPTION = 35;
+
 
 	private static final HashMap<String, Byte> ourTagByName = new HashMap<String, Byte>(256, 0.2f);
 	private static final Byte ourUnknownTag;
@@ -101,6 +103,7 @@ final class FB2Tag {
 		ourTagByName.put("author", AUTHOR);
 		ourTagByName.put("lang", LANG);
 		ourTagByName.put("genre", GENRE);
+		ourTagByName.put("description", DESCRIPTION);
 	}
 
 	public static byte getTagByName(String name) {

src/org/geometerplus/fbreader/formats/oeb/OEBCoverReader.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2007-2010 Geometer Plus <contact@geometerplus.com>
+ * Copyright (C) 2010 Geometer Plus <contact@geometerplus.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by