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| package org.apache.tapestry.describe; |
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| import java.io.BufferedReader; |
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| import java.io.IOException; |
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| import java.io.InputStreamReader; |
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| import java.io.LineNumberReader; |
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| import java.io.Reader; |
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| import java.net.URL; |
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| |
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| import org.apache.hivemind.Location; |
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| import org.apache.tapestry.IMarkupWriter; |
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| import org.apache.tapestry.IRequestCycle; |
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| public class LocationRenderStrategy implements RenderStrategy |
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| { |
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| private static final int RANGE = 5; |
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| |
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| public void renderObject(Object object, IMarkupWriter writer, IRequestCycle cycle)
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| { |
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| Location l = (Location) object;
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| writer.print(l.toString());
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| int lineNumber = l.getLineNumber();
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| if (lineNumber < 1)
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| return;
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| URL url = l.getResource().getResourceURL();
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| if (url == null)
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| return;
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| writeResourceContent(writer, url, lineNumber);
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| } |
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| private void writeResourceContent(IMarkupWriter writer, URL url, int lineNumber)
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| { |
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| LineNumberReader reader = null;
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| try
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| { |
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| reader = new LineNumberReader(new BufferedReader(
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| new InputStreamReader(url.openStream()))); |
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| writer.beginEmpty("br");
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| writer.begin("table");
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| writer.attribute("class", "location-content");
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| while (true)
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| { |
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| String line = reader.readLine();
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| if (line == null)
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| break;
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| int currentLine = reader.getLineNumber();
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| if (currentLine > lineNumber + RANGE)
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| break;
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| if (currentLine < lineNumber - RANGE)
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| continue;
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| writer.begin("tr");
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| if (currentLine == lineNumber)
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| writer.attribute("class", "target-line");
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| writer.begin("td");
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| writer.attribute("class", "line-number");
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| writer.print(currentLine);
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| writer.end();
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| writer.begin("td");
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| writer.print(line);
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| writer.end("tr");
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| writer.println();
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| } |
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| reader.close();
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| reader = null;
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| } |
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| catch (Exception ex) |
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| { |
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| } |
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| finally |
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| { |
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| writer.end("table");
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| close(reader);
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| } |
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| } |
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| private void close(Reader reader)
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| { |
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| try
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| { |
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| if (reader != null)
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| reader.close();
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| } |
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| catch (IOException ex) |
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| { |
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| } |
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| } |
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| } |