/*
* File : GCStringPrinter.java
* Created : 16 mars 2004
* By : Olivier
*
* Azureus - a Java Bittorrent client
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details ( see the LICENSE file ).
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package org.gudy.azureus2.ui.swt.shells;
import java.util.*;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;
/**
* @author Olivier Chalouhi
* @author TuxPaper (rewrite)
*/
public class GCStringPrinter
{
private static final boolean DEBUG = false;
public static boolean printString(GC gc, String string, Rectangle printArea) {
return printString(gc, string, printArea, false, false);
}
public static boolean printString(GC gc, String string, Rectangle printArea,
boolean skipClip, boolean fullLinesOnly) {
return printString(gc, string, printArea, skipClip, fullLinesOnly, SWT.WRAP
| SWT.TOP);
}
/**
*
* @param gc GC to print on
* @param string Text to print
* @param printArea Area of GC to print text to
* @param skipClip Don't set any clipping on the GC. Text may overhang
* printArea when this is true
* @param fullLinesOnly If bottom of a line will be chopped off, do not display it
* @param flags SWT flags. SWT.CENTER, SWT.BOTTOM, SWT.TOP, SWT.WRAP
* @return whether it fit
*/
public static boolean printString(GC gc, String string, Rectangle printArea,
boolean skipClip, boolean fullLinesOnly, int flags) {
try {
return _printString(gc, string, printArea, skipClip, fullLinesOnly, flags);
} catch (Exception e) {
e.printStackTrace();
}
return false;
}
private static boolean _printString(GC gc, String string,
Rectangle printArea, boolean skipClip, boolean fullLinesOnly, int flags) {
if (string == null) {
return false;
}
ArrayList lines = new ArrayList();
if (printArea.isEmpty()) {
return false;
}
boolean wrap = (flags & SWT.WRAP) > 0;
Rectangle rectDraw = new Rectangle(printArea.x, printArea.y,
printArea.width, printArea.height);
int height = 0;
Rectangle oldClipping = null;
try {
if (!skipClip) {
oldClipping = gc.getClipping();
// Protect the GC from drawing outside the drawing area
gc.setClipping(printArea);
}
//We need to add some cariage return ...
// replaceall is slow
String sTabsReplaced = string.indexOf('\t') > 0 ? string.replaceAll("\t",
" ") : string;
// Process string line by line
int iCurrentHeight = 0;
StringTokenizer stLine = new StringTokenizer(sTabsReplaced, "\n");
while (stLine.hasMoreElements()) {
String sLine = stLine.nextToken();
String sLastExcess = null;
do {
Object[] lineInfo = processLine(gc, sLine, printArea, wrap,
fullLinesOnly, stLine.hasMoreElements());
String sProcessedLine = (String) lineInfo[0];
if (sProcessedLine != null && sProcessedLine.length() > 0) {
int excessPos = ((Long) lineInfo[1]).intValue();
Point extent = gc.stringExtent(sProcessedLine);
iCurrentHeight += extent.y;
boolean isOverY = iCurrentHeight > printArea.height;
if (DEBUG) {
System.out.println("Adding Line: [" + sProcessedLine + "]"
+ sProcessedLine.length() + "; h=" + iCurrentHeight + "("
+ printArea.height + "). fullOnly?" + fullLinesOnly
+ ". Excess: " + lineInfo[1]);
}
if (isOverY && !fullLinesOnly) {
fullLinesOnly = true;
lines.add(sProcessedLine);
} else if (isOverY && fullLinesOnly) {
String excess;
if (fullLinesOnly) {
excess = sLastExcess;
} else {
excess = excessPos >= 0 ? sLine.substring(excessPos) : null;
}
if (excess != null) {
if (fullLinesOnly) {
if (lines.size() > 0) {
sProcessedLine = (String) lines.remove(lines.size() - 1);
extent = gc.stringExtent(sProcessedLine);
} else {
if (DEBUG) {
System.out.println("No PREV!?");
}
return false;
}
}
StringBuffer outputLine = new StringBuffer(sProcessedLine);
int[] iLineLength = {
extent.x
};
int newExcessPos = processWord(gc, sProcessedLine,
" " + excess, printArea, false, iLineLength, outputLine,
new StringBuffer());
if (DEBUG) {
System.out.println(" with word [" + excess + "] len is "
+ iLineLength[0] + "(" + printArea.width + ") w/excess "
+ newExcessPos);
}
lines.add(outputLine.toString());
if (DEBUG) {
System.out.println("replace prev line with: "
+ outputLine.toString());
}
} else {
if (DEBUG) {
System.out.println("No Excess");
}
}
return false;
} else {
lines.add(sProcessedLine);
}
sLine = excessPos >= 0 ? sLine.substring(excessPos) : null;
sLastExcess = sLine;
} else {
if (DEBUG) {
System.out.println("Line process resulted in no text: " + sLine);
}
return false;
}
} while (sLine != null);
}
} finally {
if (!skipClip) {
gc.setClipping(oldClipping);
}
if (lines.size() > 0) {
String fullText = null;
for (Iterator iter = lines.iterator(); iter.hasNext();) {
String text = (String) iter.next();
if (fullText == null) {
fullText = text;
} else {
fullText += "\n" + text;
}
}
Point size = gc.textExtent(fullText);
if ((flags & (SWT.BOTTOM)) != 0) {
rectDraw.y = rectDraw.y + rectDraw.height - size.y;
} else if ((flags & SWT.TOP) == 0) {
// center vert
rectDraw.y = rectDraw.y + (rectDraw.height - size.y) / 2;
}
for (Iterator iter = lines.iterator(); iter.hasNext();) {
String text = (String) iter.next();
drawLine(gc, text, flags, rectDraw);
}
}
}
return height <= printArea.height;
}
/**
* @param hasMoreElements
* @param line
*
* @since 3.0.0.7
*/
private static Object[] processLine(final GC gc, final String sLine,
final Rectangle printArea, final boolean wrap,
final boolean fullLinesOnly, boolean hasMoreElements) {
StringBuffer outputLine = new StringBuffer();
int excessPos = -1;
if (gc.stringExtent(sLine).x > printArea.width) {
if (DEBUG) {
System.out.println("Line to process: " + sLine);
}
StringTokenizer stWord = new StringTokenizer(sLine, " ");
StringBuffer space = new StringBuffer(1);
int[] iLineLength = {
0
};
if (!wrap) {
if (DEBUG) {
System.out.println("No Wrap.. doing all in one line");
}
processWord(gc, sLine, sLine, printArea, wrap, iLineLength, outputLine,
space);
} else {
// Process line word by word
int curPos = 0;
while (stWord.hasMoreElements()) {
String word = stWord.nextToken();
excessPos = processWord(gc, sLine, word, printArea, wrap,
iLineLength, outputLine, space);
if (DEBUG) {
System.out.println(" with word [" + word + "] len is "
+ iLineLength[0] + "(" + printArea.width + ") w/excess "
+ excessPos);
}
if (excessPos >= 0) {
excessPos += curPos;
break;
}
curPos += word.length() + 1;
}
}
} else {
outputLine.append(sLine);
}
if (!wrap && hasMoreElements) {
outputLine.replace(outputLine.length() - 1, outputLine.length(), "..");
}
//drawLine(gc, outputLine, flags, rectDraw);
// if (!wrap) {
// return hasMoreElements;
// }
return new Object[] {
outputLine.toString(),
new Long(excessPos)
};
}
/**
* @param int Position of part of word that didn't fit
*
* @since 3.0.0.7
*/
private static int processWord(final GC gc, final String sLine, String word,
final Rectangle printArea, final boolean wrap, final int[] iLineLength,
StringBuffer outputLine, final StringBuffer space) {
Point ptWordSize = gc.stringExtent(word + " ");
boolean bWordLargerThanWidth = ptWordSize.x > printArea.width;
if (iLineLength[0] + ptWordSize.x > printArea.width) {
//if (ptWordSize.x > printArea.width && word.length() > 1) {
// word is longer than space avail, split
int endIndex = word.length();
do {
endIndex--;
ptWordSize = gc.stringExtent(word.substring(0, endIndex) + " ");
} while (endIndex > 0 && ptWordSize.x + iLineLength[0] > printArea.width);
if (DEBUG) {
System.out.println("excess starts at " + endIndex + "(" + ptWordSize.x
+ "px) of " + word.length() + ". "
+ (ptWordSize.x + iLineLength[0]) + "/" + printArea.width
+ "; wrap?" + wrap);
}
if (endIndex > 0 && outputLine.length() > 0) {
outputLine.append(space);
}
if (endIndex == 0 && outputLine.length() == 0) {
endIndex = 1;
}
if (wrap && ptWordSize.x < printArea.width && !bWordLargerThanWidth) {
// whole word is excess
return 0;
}
outputLine.append(word.substring(0, endIndex));
if (!wrap) {
int len = outputLine.length();
if (len == 0) {
if (word.length() > 0) {
outputLine.append(word.charAt(0));
} else if (sLine.length() > 0) {
outputLine.append(sLine.charAt(0));
}
} else if (len > 1) {
outputLine.replace(outputLine.length() - 1, outputLine.length(), "..");
}
}
//drawLine(gc, outputLine, flags, rectDraw);
if (DEBUG) {
System.out.println("excess " + word.substring(endIndex));
}
return endIndex;
}
iLineLength[0] += ptWordSize.x;
if (iLineLength[0] > printArea.width) {
if (space.length() > 0) {
space.delete(0, space.length());
}
if (!wrap) {
int len = outputLine.length();
if (len == 0) {
if (word.length() > 0) {
outputLine.append(word.charAt(0));
} else if (sLine.length() > 0) {
outputLine.append(sLine.charAt(0));
}
} else if (len > 1) {
outputLine.replace(outputLine.length() - 1, outputLine.length(), "..");
}
return -1;
} else {
return 0;
}
//drawLine(gc, outputLine, flags, rectDraw);
}
if (outputLine.length() > 0) {
outputLine.append(space);
}
outputLine.append(word);
if (space.length() > 0) {
space.delete(0, space.length());
}
space.append(' ');
return -1;
}
/**
* @param gc
* @param outputLine
* @param flags
* @param printArea
*/
private static void drawLine(GC gc, String outputLine, int flags,
Rectangle printArea) {
String sOutputLine = outputLine.toString();
Point drawSize = gc.textExtent(sOutputLine);
int x0;
if ((flags & SWT.RIGHT) > 0) {
x0 = printArea.x + printArea.width - drawSize.x;
} else if ((flags & SWT.CENTER) > 0) {
x0 = printArea.x + (printArea.width - drawSize.x) / 2;
} else {
x0 = printArea.x;
}
int y0 = printArea.y;
gc.drawText(sOutputLine, x0, y0, true);
printArea.y += drawSize.y;
}
private static int getAdvanceWidth(GC gc, String s) {
int result = 0;
for (int i = 0; i < s.length(); i++) {
result += gc.getAdvanceWidth(s.charAt(i)) - 1;
}
return result;
}
public static void main(String[] args) {
Display display = Display.getDefault();
final Shell shell = new Shell(display, SWT.SHELL_TRIM);
final String text = "Opil Wrir, Na Poys Iysk, Yann Only. test of the string printer averlongwordthisisyesindeed";
shell.setSize(500, 500);
GridLayout gridLayout = new GridLayout(2, false);
shell.setLayout(gridLayout);
Composite cButtons = new Composite(shell, SWT.NONE);
GridData gridData = new GridData(SWT.NONE, SWT.FILL, false, true);
cButtons.setLayoutData(gridData);
final Composite cPaint = new Composite(shell, SWT.NONE);
gridData = new GridData(SWT.FILL, SWT.FILL, true, true);
cPaint.setLayoutData(gridData);
cButtons.setLayout(new RowLayout(SWT.VERTICAL));
Listener l = new Listener() {
public void handleEvent(Event event) {
cPaint.redraw();
}
};
final Text txtText = new Text(cButtons, SWT.WRAP | SWT.MULTI | SWT.BORDER);
txtText.setText(text);
txtText.addListener(SWT.Modify, l);
txtText.setLayoutData(new RowData(100, 100));
final Button btnSkipClip = new Button(cButtons, SWT.CHECK);
btnSkipClip.setText("Skip Clip");
btnSkipClip.setSelection(true);
btnSkipClip.addListener(SWT.Selection, l);
final Button btnFullOnly = new Button(cButtons, SWT.CHECK);
btnFullOnly.setText("Full Lines Only");
btnFullOnly.setSelection(true);
btnFullOnly.addListener(SWT.Selection, l);
final Combo cboVAlign = new Combo(cButtons, SWT.READ_ONLY);
cboVAlign.add("Top");
cboVAlign.add("Bottom");
cboVAlign.add("None");
cboVAlign.addListener(SWT.Selection, l);
cboVAlign.select(0);
final Combo cboHAlign = new Combo(cButtons, SWT.READ_ONLY);
cboHAlign.add("Left");
cboHAlign.add("Center");
cboHAlign.add("Right");
cboHAlign.add("None");
cboHAlign.addListener(SWT.Selection, l);
cboHAlign.select(0);
final Button btnWrap = new Button(cButtons, SWT.CHECK);
btnWrap.setText("Wrap");
btnWrap.setSelection(true);
btnWrap.addListener(SWT.Selection, l);
cPaint.addListener(SWT.Paint, new Listener() {
public void handleEvent(Event event) {
GC gc = new GC(cPaint);
Color colorBox = gc.getDevice().getSystemColor(SWT.COLOR_YELLOW);
Color colorText = gc.getDevice().getSystemColor(SWT.COLOR_BLACK);
gc.setForeground(colorText);
Rectangle bounds = cPaint.getClientArea();
int style = btnWrap.getSelection() ? SWT.WRAP : 0;
if (cboVAlign.getSelectionIndex() == 0) {
style |= SWT.TOP;
} else if (cboVAlign.getSelectionIndex() == 1) {
style |= SWT.BOTTOM;
}
if (cboHAlign.getSelectionIndex() == 0) {
style |= SWT.LEFT;
} else if (cboHAlign.getSelectionIndex() == 1) {
style |= SWT.CENTER;
} else if (cboHAlign.getSelectionIndex() == 2) {
style |= SWT.RIGHT;
}
printString(gc, txtText.getText(), bounds, btnSkipClip.getSelection(),
btnFullOnly.getSelection(), style);
bounds.width--;
bounds.height--;
gc.setForeground(colorBox);
gc.drawRectangle(bounds);
System.out.println();
gc.dispose();
}
});
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
}
}
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