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Render themes: support location prefixes in resources, closes #66

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This commit is contained in:
Emux 2016-07-14 15:16:16 +03:00
parent 73bc26dd2d
commit 9b4cf470f9
1 changed files with 46 additions and 10 deletions
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54
vtm/src/org/oscim/backend/CanvasAdapter.java
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@ -34,6 +34,9 @@ import java.io.InputStream;
public abstract class CanvasAdapter {
private static final Logger log = LoggerFactory.getLogger(CanvasAdapter.class);
private static final String PREFIX_ASSETS = "assets:";
private static final String PREFIX_FILE = "file:";
/**
* The instance provided by backend
*/
@ -116,19 +119,22 @@ public abstract class CanvasAdapter {
return null;
}
String pathName = (relativePathPrefix == null || relativePathPrefix.length() == 0 ? "" : relativePathPrefix) + File.separatorChar + src;
InputStream inputStream = null;
File file = new File(pathName);
if (file.exists() && file.isFile() && file.canRead())
inputStream = new FileInputStream(file);
InputStream inputStream;
if (src.startsWith(PREFIX_ASSETS)) {
src = src.substring(PREFIX_ASSETS.length());
inputStream = inputStreamFromAssets(relativePathPrefix, src);
} else if (src.startsWith(PREFIX_FILE)) {
src = src.substring(PREFIX_FILE.length());
inputStream = inputStreamFromFile(relativePathPrefix, src);
} else {
inputStream = inputStreamFromFile(relativePathPrefix, src);
if (inputStream == null)
inputStream = AssetAdapter.g.openFileAsStream(pathName);
inputStream = inputStreamFromAssets(relativePathPrefix, src);
}
if (inputStream == null) {
log.error("invalid resource: " + pathName);
log.error("invalid resource: " + src);
return null;
}
@ -137,6 +143,36 @@ public abstract class CanvasAdapter {
return bitmap;
}
private static InputStream inputStreamFromAssets(String relativePathPrefix, String src) throws IOException {
String pathName = (relativePathPrefix == null || relativePathPrefix.length() == 0 ? "" : relativePathPrefix + File.separatorChar) + src;
return AssetAdapter.g.openFileAsStream(pathName);
}
private static InputStream inputStreamFromFile(String relativePathPrefix, String src) throws IOException {
File file = getFile(relativePathPrefix, src);
if (!file.exists()) {
if (src.length() > 0 && src.charAt(0) == File.separatorChar) {
file = getFile(relativePathPrefix, src.substring(1));
}
if (!file.exists()) {
file = null;
}
} else if (!file.isFile() || !file.canRead()) {
file = null;
}
if (file != null) {
return new FileInputStream(file);
}
return null;
}
private static File getFile(String parentPath, String pathName) {
if (pathName.charAt(0) == File.separatorChar) {
return new File(pathName);
}
return new File(parentPath, pathName);
}
protected static void init(CanvasAdapter adapter) {
g = adapter;
}