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image-loader add support for inline data uri image references

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This commit is contained in:
Dimitry Ivanov 2018-08-25 13:29:55 +03:00
parent c57d06dc7d
commit 75088d8414
2 changed files with 79 additions and 1 deletions
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39
markwon-image-loader/src/main/java/ru/noties/markwon/il/AsyncDrawableLoader.java
View File

@ -7,8 +7,10 @@ import android.os.Handler;
import android.os.Looper;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.text.TextUtils;
import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
@ -46,6 +48,12 @@ public class AsyncDrawableLoader implements AsyncDrawable.Loader {
private static final String FILE_ANDROID_ASSETS = "android_asset";
private static final String SCHEME_FILE = "file";
private static final String SCHEME_DATA = "data";
private static final DataUriParser DATA_URI_PARSER = DataUriParser.create();
private static final DataUriDecoder DATA_URI_DECODER = DataUriDecoder.create();
private final OkHttpClient client;
private final Resources resources;
private final ExecutorService executorService;
@ -103,9 +111,14 @@ public class AsyncDrawableLoader implements AsyncDrawable.Loader {
final boolean isFromFile;
final Uri uri = Uri.parse(destination);
if ("file".equals(uri.getScheme())) {
final String scheme = uri.getScheme();
if (SCHEME_FILE.equals(scheme)) {
item = fromFile(uri);
isFromFile = true;
} else if (SCHEME_DATA.equals(scheme)) {
item = fromData(uri.getSchemeSpecificPart());
isFromFile = false;
} else {
item = fromNetwork(destination);
isFromFile = false;
@ -208,6 +221,30 @@ public class AsyncDrawableLoader implements AsyncDrawable.Loader {
return out;
}
@Nullable
private Item fromData(@Nullable String part) {
if (TextUtils.isEmpty(part)) {
return null;
}
final DataUri dataUri = DATA_URI_PARSER.parse(part);
if (dataUri == null) {
return null;
}
final byte[] bytes = DATA_URI_DECODER.decode(dataUri);
if (bytes == null) {
return null;
}
return new Item(
null,
dataUri.contentType(),
new ByteArrayInputStream(bytes)
);
}
@Nullable
private Item fromNetwork(@NonNull String destination) {

41
markwon-image-loader/src/main/java/ru/noties/markwon/il/DataUriDecoder.java Normal file
View File

@ -0,0 +1,41 @@
package ru.noties.markwon.il;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.text.TextUtils;
import android.util.Base64;
public abstract class DataUriDecoder {
@Nullable
public abstract byte[] decode(@NonNull DataUri dataUri);
@NonNull
public static DataUriDecoder create() {
return new Impl();
}
static class Impl extends DataUriDecoder {
@Nullable
@Override
public byte[] decode(@NonNull DataUri dataUri) {
final String data = dataUri.data();
if (!TextUtils.isEmpty(data)) {
try {
if (dataUri.base64()) {
return Base64.decode(data.getBytes("UTF-8"), Base64.DEFAULT);
} else {
return data.getBytes("UTF-8");
}
} catch (Throwable t) {
return null;
}
} else {
return null;
}
}
}
}