01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: */
17:
18: /* $Id: ConditionalElementListener.java 426576 2006-07-28 15:44:37Z jeremias $ */
19:
20: package org.apache.fop.layoutmgr;
21:
22: import org.apache.fop.traits.MinOptMax;
23:
24: /**
25: * This interface is used to notify layout managers about the situation around spaces, borders
26: * and padding just before the addArea() method is called when a part is being painted.
27: */
28: public interface ConditionalElementListener {
29:
30: /**
31: * Notifies the layout manager about the effective length of its space.
32: * @param side the side to which the space applies
33: * @param effectiveLength the effective length after space-resolution (null means zero length)
34: */
35: void notifySpace(RelSide side, MinOptMax effectiveLength);
36:
37: /**
38: * Notifies the layout manager about the effective length/width of its border.
39: * @param side the side to which the border applies
40: * @param effectiveLength the effective length in the current break situation
41: * (null means zero length)
42: */
43: void notifyBorder(RelSide side, MinOptMax effectiveLength);
44:
45: /**
46: * Notifies the layout manager about the effective length/width of its padding.
47: * @param side the side to which the padding applies
48: * @param effectiveLength the effective length in the current break situation
49: * (null means zero length)
50: */
51: void notifyPadding(RelSide side, MinOptMax effectiveLength);
52:
53: }
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