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Add support for reading slices of text files.

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This commit is contained in:
Braden Shepherdson 2013-01-02 15:34:39 -08:00
parent 6efeb1471c
commit 552885dbd3
1 changed files with 22 additions and 3 deletions
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25
framework/src/org/apache/cordova/FileUtils.java
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@ -112,7 +112,16 @@ public class FileUtils extends CordovaPlugin {
callbackContext.sendPluginResult(new PluginResult(PluginResult.Status.OK, b));
}
else if (action.equals("readAsText")) {
String s = this.readAsText(args.getString(0), args.getString(1));
int start = 0;
int end = Integer.MAX_VALUE;
if (args.length() >= 3) {
start = args.getInt(2);
}
if (args.length() >= 4) {
end = args.getInt(3);
}
String s = this.readAsText(args.getString(0), args.getString(1), start, end);
callbackContext.sendPluginResult(new PluginResult(PluginResult.Status.OK, s));
}
else if (action.equals("readAsDataURL")) {
@ -932,17 +941,27 @@ public class FileUtils extends CordovaPlugin {
* @param filename The name of the file.
* @param encoding The encoding to return contents as. Typical value is UTF-8.
* (see http://www.iana.org/assignments/character-sets)
* @param start Start position in the file.
* @param end End position to stop at (exclusive).
* @return Contents of file.
* @throws FileNotFoundException, IOException
*/
public String readAsText(String filename, String encoding) throws FileNotFoundException, IOException {
public String readAsText(String filename, String encoding, int start, int end) throws FileNotFoundException, IOException {
int diff = end - start;
byte[] bytes = new byte[1000];
BufferedInputStream bis = new BufferedInputStream(getPathFromUri(filename), 1024);
ByteArrayOutputStream bos = new ByteArrayOutputStream();
int numRead = 0;
while ((numRead = bis.read(bytes, 0, 1000)) >= 0) {
if (start > 0) {
bis.skip(start);
}
while ( diff > 0 && (numRead = bis.read(bytes, 0, Math.min(1000, diff))) >= 0) {
diff -= numRead;
bos.write(bytes, 0, numRead);
}
return new String(bos.toByteArray(), encoding);
}