/*
* Copyright 1995-2003 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
package sun.awt.motif;
import java.awt.*;
import java.awt.peer.*;
import java.awt.event.TextEvent;
import java.awt.event.MouseEvent;
import java.awt.event.MouseWheelEvent;
import java.awt.datatransfer.*;
import java.io.BufferedReader;
import java.io.StringReader;
import java.io.IOException;
import java.util.Vector;
import java.awt.im.InputMethodRequests;
public class MTextAreaPeer extends MComponentPeer implements TextAreaPeer {
native void pCreate(MComponentPeer parent);
private boolean firstChangeSkipped;
/**
* Initialize JNI field and method IDs
*/
private static native void initIDs();
static {
initIDs();
}
void create(MComponentPeer parent) {
firstChangeSkipped = false;
pCreate(parent);
}
void initialize() {
int start, end;
TextArea txt = (TextArea)target;
String text;
if ((text = txt.getText()) != null) {
setText(text);
}
start = txt.getSelectionStart();
end = txt.getSelectionEnd();
if (end > start) {
select(start, end);
} else {
setCaretPosition(start);
}
super.pSetScrollbarBackground(getParent_NoClientCode(target).getBackground());
if (!target.isBackgroundSet()) {
// This is a way to set the background color of the TextArea
// without calling setBackground - go through native C code
setTargetBackground(SystemColor.text);
}
if (!target.isForegroundSet()) {
target.setForeground(SystemColor.textText);
}
setEditable(txt.isEditable());
// oldSelectionStart = -1; // accessibility support
// oldSelectionEnd = -1; // accessibility support
super.initialize();
}
public MTextAreaPeer(TextArea target) {
super(target);
}
public void setEditable(boolean editable) {
pSetEditable(editable);
/* 4136955 - Calling setBackground() here works around an Xt
* bug by forcing Xt to flush an internal widget cache
*/
setBackground(target.getBackground());
}
public void setBackground(Color c) {
setTextBackground(c);
}
public void setForeground(Color c) {
pSetInnerForeground(c);
}
native int getExtraWidth();
native int getExtraHeight();
public native void setTextBackground(Color c);
public native void pSetEditable(boolean e);
public native void select(int selStart, int selEnd);
public native int getSelectionStart();
public native int getSelectionEnd();
public native void setText(String txt);
public native String getText();
public native void insert(String txt, int pos);
public native void replaceRange(String txt, int start, int end);
public native void setFont(Font f);
public native void setCaretPosition(int pos);
public native int getCaretPosition();
public native void pSetCursor(Cursor c);
native void pShow2();
native void pMakeCursorVisible();
public Dimension getMinimumSize() {
return getMinimumSize(10, 60);
}
public Dimension getPreferredSize(int rows, int cols) {
return getMinimumSize(rows, cols);
}
public Dimension getMinimumSize(int rows, int cols) {
FontMetrics fm = getFontMetrics(target.getFont());
/* Calculate proper size for text area plus scrollbars.
* - Motif allows NO leading in its text areas ...
* - extra width and height counts everything outside the
* usable text space.
* (bug 4103248, 4120310):
* - Motif uses maxAscent + maxDescent, not ascent + descent.
*/
int colWidth = fm.charWidth('0');
int rowHeight = fm.getMaxAscent() + fm.getMaxDescent();
return new Dimension(cols * colWidth + getExtraWidth(),
rows * rowHeight + getExtraHeight());
}
public boolean isFocusable() {
return true;
}
// Called from native widget when paste key is pressed and we
// already own the selection (prevents Motif from hanging while
// waiting for the selection)
//
public void pasteFromClipboard() {
Clipboard clipboard = target.getToolkit().getSystemClipboard();
Transferable content = clipboard.getContents(this);
if (content != null) {
try {
String data = (String)(content.getTransferData(DataFlavor.stringFlavor));
// fix for 4401853: to clear TextArea selection if null is pasted
data = (data == null ? "" : data);
replaceRange(data, getSelectionStart(), getSelectionEnd());
} catch (Exception e) {
}
}
}
/*
* Print the native component by rendering the Motif look ourselves.
* ToDo(aim): needs to query native motif for more accurate size and
* color information, the top/left text offsets, and selected text.
*/
static final int MARGIN = 2;
static final int BORDER = 1;
static final int SCROLLBAR = 16;
int fontHeight;
int fontAscent;
int fontLeading;
int topLine = 0;
int numLines = 0;
int textLength = 0;
Vector lines;
int selStart = 0;
int selEnd = 0;
int movedRight = 0;
// the following vars are assigned in print() method
transient boolean hscrollbar;
transient boolean vscrollbar;
public void print(Graphics g) {
TextArea area = (TextArea)target;
Dimension d = area.size();
Color bg = area.getBackground();
Color fg = area.getForeground();
FontMetrics fm = getFontMetrics(area.getFont());
int vmin, vmax, vval, vvis;
int hmin, hmax, hval, hvis;
int max = 0;
/*
Doesn't work right yet.
selStart = area.getSelectionStart();
selEnd = area.getSelectionEnd();
*/
// Figure out number of lines and max line length
String text = area.getText();
textLength = text.length();
BufferedReader is = new BufferedReader(new StringReader(text));
String line;
int pos = 0;
lines = new Vector();
int sv = ((TextArea)target).getScrollbarVisibility();
vscrollbar = (sv == TextArea.SCROLLBARS_BOTH ||
sv == TextArea.SCROLLBARS_VERTICAL_ONLY);
hscrollbar = (sv == TextArea.SCROLLBARS_BOTH ||
sv == TextArea.SCROLLBARS_HORIZONTAL_ONLY);
boolean wrap = !hscrollbar;
int w = d.width - (vscrollbar ? SCROLLBAR : 0);
int h = d.height - (hscrollbar ? SCROLLBAR : 0);
try {
numLines = 0;
while((line = is.readLine()) != null) {
int len = fm.stringWidth(line);
if (len > w && wrap) {
// need to do line wrapping
int start = 0;
int end = 0;
int string_length = line.length();
while (true) {
int line_width = 0;
end = start + 1; // at least one character per line
while (end < string_length) {
char c = line.charAt(end);
int cw = fm.charWidth(c);
if (line_width + cw + 10 > w) // +10?
break;
line_width += cw;
end++;
}
// form a line from start to end (not including end)
String substr = line.substring(start, end);
// System.out.println("wrap line: " + substr);
TextLine tline = new TextLine();
tline.text = substr;
tline.pos = pos + start;
lines.addElement(tline);
start = end;
max = Math.max(max, len);
numLines ++;
if (end == string_length) {
// we have processed the whole string
pos += line.length() + 1; // +1 for the ending \n ?
break;
}
}
} else {
TextLine tline = new TextLine();
tline.text = line;
tline.pos = pos;
lines.addElement(tline);
pos += line.length() + 1;
max = Math.max(max, len);
numLines++;
}
}
is.close();
} catch (IOException e) {
}
fontHeight = fm.getHeight();
fontAscent = fm.getAscent();
fontLeading = fm.getLeading();
hmin = vmin = 0;
vvis = linesInWindow(true);
vmax = Math.max(numLines - vvis, 0);
vval = 0;
hvis = w - (2 * MARGIN);
hmax = Math.max(max - hvis, 0);
hval = 0;
g.setColor(bg);
g.fillRect(BORDER, BORDER, w, h);
if (vscrollbar)
{
int sbh = d.height - (hscrollbar ? SCROLLBAR : 0);
g.fillRect(d.width - SCROLLBAR - 3, 1, SCROLLBAR - 3, sbh - 1);
Graphics ng = g.create();
try {
ng.translate(d.width - (SCROLLBAR - 2), 0);
drawScrollbar(ng, bg, SCROLLBAR - 2, sbh,
vmin, vmax, vval, vvis, false);
} finally {
ng.dispose();
}
}
if (hscrollbar)
{
int sbw = d.width - (vscrollbar ? SCROLLBAR : 0);
g.fillRect(1, d.height - SCROLLBAR - 3, sbw - 1, SCROLLBAR - 3);
Graphics ng = g.create();
try {
ng.translate(0, d.height - (SCROLLBAR - 2));
drawScrollbar(ng, bg, SCROLLBAR - 2, sbw,
hmin, hmax, hval, hvis, true);
} finally {
ng.dispose();
}
}
draw3DRect(g, bg, 0, 0, w - 1, h - 1, false);
if (text != null) {
int l = linesInWindow(true);
h = d.height - ((2 * MARGIN) + SCROLLBAR);
int e = Math.min(numLines - 1, (topLine + l) - 1);
paintLines(g, bg, fg, topLine, e);
}
target.print(g);
}
int linesInWindow(boolean horizScrollbar) {
Dimension d = target.size();
int htotal = d.height - ((2 * MARGIN) + (horizScrollbar? SCROLLBAR : 0));
return htotal / fontHeight;
}
void paintLines(Graphics g, Color bg, Color fg, int s, int e) {
Dimension d = target.size();
int w = d.width - ((2 * BORDER) + (vscrollbar ? SCROLLBAR : 0));
int h = d.height - ((2 * BORDER) + (hscrollbar ? SCROLLBAR : 0));
int lm = linesInWindow(true) + topLine;
s = Math.max(topLine, s);
e = Math.min(e, lm - 1);
Graphics ng = g.create();
try {
ng.clipRect(BORDER + MARGIN, MARGIN + BORDER, w - (2*MARGIN),
h - (2*MARGIN));
ng.setFont(target.getFont());
for (int i = s ; i <= e; i++) {
paintLine(ng, bg, fg, i);
}
} finally {
ng.dispose();
}
}
void paintLine(Graphics g, Color bg, Color fg, int lnr) {
Dimension d = target.size();
int l = linesInWindow(true);
if((lnr < topLine) || (lnr >= l + topLine)) {
return;
}
int w = d.width - ((2 * BORDER) + (hscrollbar ? SCROLLBAR : 0));
int y = MARGIN + fontLeading + ((lnr - topLine) * fontHeight);
String text = ((TextLine)lines.elementAt(lnr)).text;
int len = text.length();
if (lnr > numLines - 1) {
g.setColor(bg);
g.fillRect(BORDER, y - fontLeading, w, fontHeight);
return;
}
int s = 0;
int e = (lnr < numLines - 1) ? len : textLength;
int xs = pos2x(selStart) - movedRight;
int xe = pos2x(selEnd) - movedRight;
Color highlight = bg.brighter();
if ((selStart < s) && (selEnd > e)) {
g.setColor(highlight);
g.fillRect(BORDER, y - fontLeading, w, fontHeight);
} else {
g.setColor(bg);
g.fillRect(BORDER, y - fontLeading, w, fontHeight);
if ((selStart >= s) && (selStart <= e)) {
g.setColor(highlight);
if (selEnd > e) {
g.fillRect(xs, y - fontLeading, (w + BORDER) - xs, fontHeight);
} else if (selStart == selEnd) {
//g.fillRect(xs, y - fontLeading, 1, fontHeight);
} else {
g.fillRect(xs, y - fontLeading, xe - xs, fontHeight);
}
} else if ((selEnd >= s) && (selEnd <= e)) {
g.setColor(highlight);
g.fillRect(BORDER, y - fontLeading, xe - BORDER, fontHeight);
}
}
g.setColor(fg);
g.drawString(text, MARGIN - movedRight, y + fontAscent);
}
int pos2x(int pos) {
FontMetrics fm = getFontMetrics(target.getFont());
int widths[] = fm.getWidths();
TextLine tl1 = (TextLine)lines.elementAt(0);
TextLine tl2;
int l = 0;
for (int i = 0; i < lines.size() - 1; i++) {
tl2 = (TextLine)lines.elementAt(i+1);
if (pos >= tl1.pos && pos < tl2.pos) {
l = i;
break;
}
tl1 = tl2;
}
int x = MARGIN;
for (int i = 0 ; i < (pos - tl1.pos - 1) ; i++) {
x += widths[tl1.text.charAt(i)];
}
return x;
}
/**
* DEPRECATED
*/
public void insertText(String txt, int pos) {
insert(txt, pos);
}
/**
* DEPRECATED
*/
public void replaceText(String txt, int start, int end) {
replaceRange(txt, start, end);
}
/**
* DEPRECATED
*/
public Dimension minimumSize() {
return getMinimumSize();
}
/**
* DEPRECATED
*/
public Dimension preferredSize(int rows, int cols) {
return getPreferredSize(rows, cols);
}
/**
* DEPRECATED
*/
public Dimension minimumSize(int rows, int cols) {
return getMinimumSize(rows, cols);
}
/*
* Post a new TextEvent when the value of a text component changes.
*/
public void valueChanged() {
postEvent(new TextEvent(target, TextEvent.TEXT_VALUE_CHANGED));
}
void pShow(){
pShow2();
notifyTextComponentChange(true);
}
void pHide(){
notifyTextComponentChange(false);
super.pHide();
}
void pDispose(){
notifyTextComponentChange(false);
super.pDispose();
}
public boolean handlesWheelScrolling() {return true;}
public void handleEvent(AWTEvent e) {
if (e.getID() == MouseEvent.MOUSE_WHEEL) {
MouseWheelEvent mwe = (MouseWheelEvent)e;
nativeHandleMouseWheel(mwe.getScrollType(),
mwe.getScrollAmount(),
mwe.getWheelRotation());
}
else {
super.handleEvent(e);
}
}
public InputMethodRequests getInputMethodRequests() {
return null;
}
native void nativeHandleMouseWheel(int scrollType,
int scrollAmount,
int wheelRotation);
//
// Accessibility support
//
// stub functions: to be fully implemented in a future release
public int getIndexAtPoint(int x, int y) { return -1; }
public Rectangle getCharacterBounds(int i) { return null; }
public long filterEvents(long mask) { return 0; }
/* To be fully implemented in a future release
int oldSelectionStart;
int oldSelectionEnd;
public native int getIndexAtPoint(int x, int y);
public native Rectangle getCharacterBounds(int i);
public native long filterEvents(long mask);
/**
* Handle a change in the text selection endpoints
* (Note: could be simply a change in the caret location)
*
public void selectionValuesChanged(int start, int end) {
return; // Need to write implementation of this.
}
*/
}
class TextLine {
String text;
int pos;
}