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package org.mozilla.gecko.gfx;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.Region;
import android.util.Log;
import org.libreoffice.LOEventFactory;
import org.libreoffice.LOKitShell;
import org.libreoffice.TileIdentifier;
import org.libreoffice.TileProvider;
import org.mozilla.gecko.util.FloatUtils;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
public class DynamicTileLayer extends Layer {
private static final String LOGTAG = DynamicTileLayer.class.getSimpleName();
private final List<SubTile> tiles = new CopyOnWriteArrayList<SubTile>();
private TileProvider tileProvider;
private final IntSize tileSize;
private RectF currentViewport = new RectF();
public DynamicTileLayer() {
this.tileSize = new IntSize(256, 256);
}
public DynamicTileLayer(IntSize tileSize) {
this.tileSize = tileSize;
}
public void setTileProvider(TileProvider tileProvider) {
this.tileProvider = tileProvider;
}
public void invalidate() {
for (SubTile tile : tiles) {
tile.invalidate();
}
}
@Override
public void beginTransaction() {
super.beginTransaction();
for (SubTile tile : tiles) {
tile.beginTransaction();
}
}
@Override
public void endTransaction() {
for (SubTile tile : tiles) {
tile.endTransaction();
}
super.endTransaction();
}
@Override
public void draw(RenderContext context) {
for (SubTile tile : tiles) {
if (RectF.intersects(tile.getBounds(context), context.viewport)) {
tile.draw(context);
}
}
}
@Override
protected void performUpdates(RenderContext context) {
super.performUpdates(context);
refreshTileMetrics();
for (SubTile tile : tiles) {
tile.performUpdates(context);
}
}
@Override
public Region getValidRegion(RenderContext context) {
Region validRegion = new Region();
for (SubTile tile : tiles) {
validRegion.op(tile.getValidRegion(context), Region.Op.UNION);
}
return validRegion;
}
@Override
public void setResolution(float newResolution) {
super.setResolution(newResolution);
for (SubTile tile : tiles) {
tile.setResolution(newResolution);
}
}
private void refreshTileMetrics() {
for (SubTile tile : tiles) {
tile.beginTransaction();
Rect position = tile.getPosition();
float positionX = tile.id.x / tile.id.zoom;
float positionY = tile.id.y / tile.id.zoom;
float tileSizeWidth = tileSize.width / tile.id.zoom;
float tileSizeHeight = tileSize.height / tile.id.zoom;
position.set((int) positionX, (int) positionY, (int) (positionX + tileSizeWidth + 1), (int) (positionY + tileSizeHeight + 1));
tile.setPosition(position);
tile.endTransaction();
}
}
private RectF roundToTileSize(RectF input, IntSize tileSize) {
float minX = ((int)(input.left / tileSize.width)) * tileSize.width;
float minY = ((int)(input.top / tileSize.height)) * tileSize.height;
float maxX = ((int)(input.right / tileSize.width) + 1) * tileSize.width;
float maxY = ((int)(input.bottom / tileSize.height) + 1) * tileSize.height;
return new RectF(minX, minY, maxX, maxY);
}
private RectF inflate(RectF rect, IntSize inflateSize) {
RectF newRect = new RectF(rect);
newRect.left -= inflateSize.width;
newRect.left = newRect.left < 0.0f ? 0.0f : newRect.left;
newRect.top -= inflateSize.height;
newRect.top = newRect.top < 0.0f ? 0.0f : newRect.top;
newRect.right += inflateSize.width;
newRect.bottom += inflateSize.height;
return newRect;
}
public void reevaluateTiles(ImmutableViewportMetrics viewportMetrics) {
if (tileProvider == null) {
return;
}
RectF newCurrentViewPort = inflate(roundToTileSize(viewportMetrics.getViewport(), tileSize), tileSize);
if (!currentViewport.equals(newCurrentViewPort)) {
Log.i(LOGTAG, "reevaluateTiles " + currentViewport + " " + newCurrentViewPort);
currentViewport = newCurrentViewPort;
clearMarkedTiles();
addNewTiles(viewportMetrics);
markTiles(viewportMetrics);
}
}
private void addNewTiles(ImmutableViewportMetrics viewportMetrics) {
for (float y = currentViewport.top; y < currentViewport.bottom; y += tileSize.height) {
if (y > viewportMetrics.getPageHeight()) {
continue;
}
for (float x = currentViewport.left; x < currentViewport.right; x += tileSize.width) {
if (x > viewportMetrics.getPageWidth()) {
continue;
}
boolean contains = false;
for (SubTile tile : tiles) {
if (tile.id.x == x && tile.id.y == y && tile.id.zoom == viewportMetrics.zoomFactor) {
contains = true;
}
}
if (!contains) {
LOKitShell.sendEvent(LOEventFactory.tileRequest(new TileIdentifier((int)x, (int)y, viewportMetrics.zoomFactor)));
}
}
}
}
private void clearMarkedTiles() {
List<SubTile> tilesToRemove = new ArrayList<SubTile>();
for (SubTile tile : tiles) {
if (tile.markedForRemoval) {
tile.destroy();
tilesToRemove.add(tile);
}
}
tiles.removeAll(tilesToRemove);
}
private void markTiles(ImmutableViewportMetrics viewportMetrics) {
for (SubTile tile : tiles) {
if (FloatUtils.fuzzyEquals(tile.id.zoom, viewportMetrics.zoomFactor)) {
RectF tileRect = new RectF(tile.id.x, tile.id.y, tile.id.x + tileSize.width, tile.id.y + tileSize.height);
if (!RectF.intersects(currentViewport, tileRect)) {
tile.markForRemoval();
}
} else {
tile.markForRemoval();
}
}
}
public void clearAndReset() {
tiles.clear();
currentViewport = new RectF();
}
public void addTile(TileIdentifier tileId) {
CairoImage image = tileProvider.createTile(tileId.x, tileId.y, tileSize, tileId.zoom);
SubTile tile = new SubTile(image, tileId);
tile.beginTransaction();
tiles.add(tile);
}
}
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