79 lines
1.9 KiB
Java
79 lines
1.9 KiB
Java
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/*
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Copyright 2007 Infordata S.p.A.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/*
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***
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30/06/98 rel. _.___- Swing, JBuilder2 e VSS.
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*/
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package net.infordata.em.tn5250;
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import java.io.IOException;
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import java.io.InputStream;
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///////////////////////////////////////////////////////////////////////////////
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/**
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* 5250 Roll command
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*
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* @version
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* @author Valentino Proietti - Infordata S.p.A.
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*/
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public class XIRollCmd extends XI5250Cmd {
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boolean ivDown;
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int ivNRows;
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int ivTopRow;
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int ivBottomRow;
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/**
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* @exception XI5250Exception raised if command parameters are wrong.
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*/
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@Override
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protected void readFrom5250Stream(InputStream inStream)
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throws IOException, XI5250Exception {
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int[] bb = new int[3];
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int i;
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for (i = 0; i < 3 && (bb[i] = inStream.read()) >= 0; i++)
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;
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if (i < 3)
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throw new XI5250Exception("Roll parameter missing",
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XI5250Emulator.ERR_INVALID_ROW_COL_ADDR);
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ivDown = ((bb[0] & 0x80) != 0);
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ivNRows = (bb[0] & 0x1F);
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ivTopRow = bb[1];
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ivBottomRow = bb[2];
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if (ivTopRow > ivBottomRow)
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throw new XI5250Exception("TopRow greater then BottomRow",
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XI5250Emulator.ERR_INVALID_ROW_COL_ADDR);
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}
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@Override
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protected void execute() {
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ivEmulator.scroll(ivDown, ivTopRow - 1, ivBottomRow, ivNRows);
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}
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}
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