add two helper methods replaceChunk and replaceParent

timse · timse · commit 848b5aeb9233 · 2017-02-14T21:16:09.000+11:00
they take an old item and a new item, remove the old item and add the new one
diff --git a/lib/Chunk.js b/lib/Chunk.js
@@ -169,6 +169,26 @@ class Chunk {
 		module.rewriteChunkInReasons(this, [otherChunk]);
 	}
 
+	replaceChunk(oldChunk, newChunk) {
+		const idx = this.chunks.indexOf(oldChunk);
+		if(idx >= 0) {
+			this.chunks.splice(idx, 1);
+		}
+		if(this !== newChunk && newChunk.addParent(this)) {
+			this.addChunk(newChunk);
+		}
+	}
+
+	replaceParent(oldParent, newParent) {
+		const idx = this.parents.indexOf(oldParent);
+		if(idx >= 0) {
+			this.parents.splice(idx, 1);
+		}
+		if(this !== newParent && newParent.addChunk(this)) {
+			this.addParent(newParent);
+		}
+	}
+
 	integrate(other, reason) {
 		if(!this.canBeIntegrated(other)) {
 			return false;
