org.netbeans.modules.parsing.api.Embedding Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.netbeans.modules.parsing.api;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;
import org.netbeans.api.editor.mimelookup.MimePath;
/**
* Represents one block of code embedded in some other source. Performance
* is the only purpose of this class. You can obtain some basic information
* about embedded block of code before it is really created.
*
* Following example shows how to create compound Embedding from some snapshot:
*
*
* Embedding compoundEmbedding = Embedding.create (Arrays.asList (new Source[] {
* snapshot.create ("some prefix code", "text/x-java"),
* snapshot.create (10, 100, "text/x-java"),
* snapshot.create ("some postfix code", "text/x-java")
* })));
*
*
* @author Jan Jancura
*/
public final class Embedding {
/**
* Creates {@link Embedding} from a list of embeddings. All embeddings
* have to be created from one Smapshot. All embeddings must have the same
* mime type, but this mime type have to be different than current
* embedding mime types.
*
* @param embeddings A list of some embeddings created from one source.
* @return A new embedding compound from given pieces.
* @throws IllegalArgumentException
* if embeddings collection is empty, or
* mime types of embeddings are not same.
* @throws NullPointerException
* embedding is null.
*/
public static Embedding create (
List embeddings
) {
if (embeddings.isEmpty ()) throw new IllegalArgumentException ();
MimePath mimePath = null;
Source source = null;
StringBuilder sb = new StringBuilder ();
List currentToOriginal = new ArrayList ();
List originalToCurrent = new ArrayList ();
int offset = 0;
for (Embedding embedding : embeddings) {
Snapshot snapshot = embedding.getSnapshot ();
if (mimePath != null) {
if (!mimePath.equals (embedding.mimePath)) {
throw new IllegalArgumentException ();
}
if (source != snapshot.getSource ()) {
throw new IllegalArgumentException ();
}
} else {
mimePath = embedding.mimePath;
source = snapshot.getSource ();
}
sb.append (snapshot.getText ());
int[][] p = snapshot.currentToOriginal;
for (int i = 0; i < p.length; i++) {
if (currentToOriginal.isEmpty () ||
currentToOriginal.get (currentToOriginal.size () - 1) [1] != -1 ||
p [i] [1] != -1
)
currentToOriginal.add (new int[] {p [i] [0] + offset, p [i] [1]});
if (p [i] [1] >= 0) {
if (!originalToCurrent.isEmpty () &&
originalToCurrent.get (originalToCurrent.size () - 1) [1] >= 0
)
originalToCurrent.add (new int[] {
originalToCurrent.get (originalToCurrent.size () - 1) [0] +
p [i] [0] + offset -
originalToCurrent.get (originalToCurrent.size () - 1) [1],
-1
});
originalToCurrent.add (new int[] {p [i] [1], p [i] [0] + offset});
} else
if (!originalToCurrent.isEmpty () &&
originalToCurrent.get (originalToCurrent.size () - 1) [1] >= 0
) {
originalToCurrent.add (new int[] {
originalToCurrent.get (originalToCurrent.size () - 1) [0] +
p [i] [0] + offset -
originalToCurrent.get (originalToCurrent.size () - 1) [1],
-1
});
}
}
offset +=snapshot.getText ().length ();
}
if (originalToCurrent.size() > 0 && originalToCurrent.get (originalToCurrent.size () - 1) [1] >= 0) {
originalToCurrent.add (new int[] {
originalToCurrent.get (originalToCurrent.size () - 1) [0] +
sb.length () -
originalToCurrent.get (originalToCurrent.size () - 1) [1],
-1
});
}
originalToCurrent.sort(TMS_VCLV);
Snapshot snapshot = Snapshot.create (
sb,
null,
source,
mimePath,
currentToOriginal.toArray (new int [0] []),
originalToCurrent.toArray (new int [0] [])
);
return new Embedding (
snapshot,
mimePath
);
}
private Snapshot snapshot;
private MimePath mimePath;
Embedding (
Snapshot snapshot,
MimePath mimePath
) {
this.snapshot = snapshot;
this.mimePath = mimePath;
}
/**
* Returns {@link Snapshot} for embedded block of code.
*
* @return A {@link Snapshot} for embedded block of code..
*/
public final Snapshot getSnapshot () {
return snapshot;
}
/**
* Returns mime type of embedded source.
*
* @return A mime type of embedded source.
*/
public final String getMimeType () {
return mimePath.getMimeType (mimePath.size () - 1);
}
/**
* Returns true if this embedding contains given offset related
* to top level source.
*
* @param originalOffset
* A offset in original source.
* @return true if this embedding contains given offset
*/
public final boolean containsOriginalOffset (int originalOffset) {
return snapshot.getEmbeddedOffset (originalOffset) >= 0;
}
@Override
public String toString () {
return "Embedding (" + getMimeType () + ", " + getSnapshot () + ")";
}
private static final Comparator TMS_VCLV = new Comparator () {
public int compare (int[] o1, int[] o2) {
return o1 [0] - o2 [0];
}
};
}
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