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feat: implement cache precalculated value of "d" on "path" element (android) #2589

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feat: implement cache precalculated value of "d" on "path" element (android) #2589

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37 changes: 37 additions & 0 deletions android/src/main/java/com/horcrux/svg/PathView.java
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Original file line number Diff line number Diff line change
Expand Up @@ -14,9 +14,25 @@
import android.graphics.Path;
import com.facebook.react.bridge.ReactContext;

import java.util.ArrayList;
import java.util.List;
import java.util.HashMap;
import java.util.Map;

class ParsedPath {
final Path path;
final List<PathElement> elements;

ParsedPath(Path path, List<PathElement> elements) {
this.path = path;
this.elements = elements;
}
}

@SuppressLint("ViewConstructor")
class PathView extends RenderableView {
private Path mPath;
private static final Map<String, ParsedPath> sPathCache = new HashMap<>();

public PathView(ReactContext reactContext) {
super(reactContext);
Expand All @@ -36,6 +52,27 @@ public void setD(String d) {
invalidate();
}

void setDByParsing(String d) {
mPath = PathParser.parse(d);
elements = PathParser.elements;
for (PathElement elem : elements) {
point.y *= mScale;
}
}
}

public void setD(String d) {
ParsedPath cached = sPathCache.get(d);
if (cached != null) {
mPath = cached.path;
elements = cached.elements;
} else {
setDByParsing(d);
sPathCache.put(d, new ParsedPath(mPath, elements));
}
invalidate();
}

@Override
Path getPath(Canvas canvas, Paint paint) {
return mPath;
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