* (c) Copyright IBM Corp. 2000, 2001.
* All Rights Reserved.
*/
-
+
import java.io.BufferedReader;
import java.io.IOException;
import java.io.Reader;
-
import java.text.BreakIterator;
+
import org.eclipse.swt.graphics.GC;
/*
* Not a real reader. Could change if requested
*/
public class LineBreakingReader {
-
+
private BufferedReader fReader;
+
private GC fGC;
+
private int fMaxWidth;
-
+
private String fLine;
+
private int fOffset;
-
+
private BreakIterator fLineBreakIterator;
/**
* Creates a reader that breaks an input text to fit in a given width.
- * @param reader Reader of the input text
- * @param gc The graphic context that defines the currently used font sizes
- * @param maxLineWidth The max width (pixes) where the text has to fit in
+ *
+ * @param reader
+ * Reader of the input text
+ * @param gc
+ * The graphic context that defines the currently used font sizes
+ * @param maxLineWidth
+ * The max width (pixes) where the text has to fit in
*/
public LineBreakingReader(Reader reader, GC gc, int maxLineWidth) {
- fReader= new BufferedReader(reader);
- fGC= gc;
- fMaxWidth= maxLineWidth;
- fOffset= 0;
- fLine= null;
- fLineBreakIterator= BreakIterator.getLineInstance();
+ fReader = new BufferedReader(reader);
+ fGC = gc;
+ fMaxWidth = maxLineWidth;
+ fOffset = 0;
+ fLine = null;
+ fLineBreakIterator = BreakIterator.getLineInstance();
}
-
+
public boolean isFormattedLine() {
return fLine != null;
}
-
+
/**
- * Reads the next line. The lengths of the line will not exceed the gived maximum
- * width.
+ * Reads the next line. The lengths of the line will not exceed the gived
+ * maximum width.
*/
public String readLine() throws IOException {
if (fLine == null) {
- String line= fReader.readLine();
+ String line = fReader.readLine();
if (line == null)
return null;
-
- int lineLen= fGC.textExtent(line).x;
+
+ int lineLen = fGC.textExtent(line).x;
if (lineLen < fMaxWidth) {
return line;
}
- fLine= line;
+ fLine = line;
fLineBreakIterator.setText(line);
- fOffset= 0;
+ fOffset = 0;
}
- int breakOffset= findNextBreakOffset(fOffset);
+ int breakOffset = findNextBreakOffset(fOffset);
String res;
if (breakOffset != BreakIterator.DONE) {
- res= fLine.substring(fOffset, breakOffset);
- fOffset= findWordBegin(breakOffset);
+ res = fLine.substring(fOffset, breakOffset);
+ fOffset = findWordBegin(breakOffset);
if (fOffset == fLine.length()) {
- fLine= null;
+ fLine = null;
}
} else {
- res= fLine.substring(fOffset);
- fLine= null;
+ res = fLine.substring(fOffset);
+ fLine = null;
}
return res;
}
-
+
private int findNextBreakOffset(int currOffset) {
- int currWidth= 0;
- int nextOffset= fLineBreakIterator.following(currOffset);
+ int currWidth = 0;
+ int nextOffset = fLineBreakIterator.following(currOffset);
while (nextOffset != BreakIterator.DONE) {
- String word= fLine.substring(currOffset, nextOffset);
- int wordWidth= fGC.textExtent(word).x;
- int nextWidth= wordWidth + currWidth;
+ String word = fLine.substring(currOffset, nextOffset);
+ int wordWidth = fGC.textExtent(word).x;
+ int nextWidth = wordWidth + currWidth;
if (nextWidth > fMaxWidth) {
if (currWidth > 0) {
return currOffset;
return nextOffset;
}
}
- currWidth= nextWidth;
- currOffset= nextOffset;
- nextOffset= fLineBreakIterator.next();
+ currWidth = nextWidth;
+ currOffset = nextOffset;
+ nextOffset = fLineBreakIterator.next();
}
return nextOffset;
}
-
+
private int findWordBegin(int idx) {
- while (idx < fLine.length() && Character.isWhitespace(fLine.charAt(idx))) {
+ while (idx < fLine.length()
+ && Character.isWhitespace(fLine.charAt(idx))) {
idx++;
}
return idx;
- }
+ }
}