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86 lines
2.3 KiB
86 lines
2.3 KiB
package com.jotuntech.sketcher.server.command;
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import java.awt.image.ImageObserver;
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import java.nio.ByteBuffer;
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import java.util.HashSet;
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import java.util.Set;
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import com.jotuntech.sketcher.common.Canvas;
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import com.jotuntech.sketcher.common.Layer;
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import com.jotuntech.sketcher.common.UndoEntry;
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import com.jotuntech.sketcher.common.User;
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import com.jotuntech.sketcher.server.AccessController;
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import com.jotuntech.sketcher.server.Command;
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import com.jotuntech.sketcher.server.CommandEntry;
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import com.jotuntech.sketcher.server.Connection;
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import com.jotuntech.sketcher.server.Server;
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public class DeleteLayerCommand implements Command {
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int layerKey;
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public DeleteLayerCommand() {
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}
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public DeleteLayerCommand(int layerKey) {
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this.layerKey = layerKey;
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}
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public int perform(Server server, Connection connection) {
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User user = connection.getUser();
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if(user == null) {
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return Connection.SEND_NONE;
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}
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if(user.isViewer()) {
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return Connection.SEND_NONE;
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}
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/** Check access controller */
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AccessController controller = server.getAccessController();
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if(controller != null) {
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if(!controller.isLayerActionAllowed(server, user)) {
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connection.getSendQueue().offer(new CommandEntry(0, new ServerMessageCommand("You are not allowed to do that.")));
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return Connection.SEND_NONE;
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}
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}
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Canvas canvas = server.getCanvas();
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Layer layer = canvas.getLayerMap().remove(layerKey);
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if(layer == null) {
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return Connection.SEND_NONE;
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}
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if(canvas.getImageObserver() != null) {
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canvas.getImageObserver().imageUpdate(null, ImageObserver.ALLBITS, 0, 0, canvas.getWidth(), canvas.getHeight());
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}
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// Remove references to layer from undo deque
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for(Connection c: server.getConnectionMap().values()) {
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Set<UndoEntry> uers = new HashSet<UndoEntry>();
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if(c.getUser() == null) {
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continue;
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}
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for(UndoEntry ue : c.getUser().getUndoDeque()) {
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if(ue.getLayer() == layer) {
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uers.add(ue);
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}
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}
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for(UndoEntry ue : uers) {
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c.getUser().getUndoDeque().remove(ue);
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}
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}
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return Connection.SEND_ALL;
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}
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public void decode(ByteBuffer in) {
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layerKey = in.getInt();
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}
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public void encode(ByteBuffer out) {
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out.putInt(layerKey);
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}
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}
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