/*
* @(#)CityInputMethod.java 1.2 99/12/03
*
* Copyright 1999 by Sun Microsystems, Inc.,
* 901 San Antonio Road, Palo Alto, California, 94303, U.S.A.
* All rights reserved.
*/
package com.sun.demos.cityim.internal;
import java.awt.AWTEvent;
import java.awt.Canvas;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Label;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Toolkit;
import java.awt.Window;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;
import java.awt.event.InputEvent;
import java.awt.event.InputMethodEvent;
import java.awt.event.KeyEvent;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.font.TextAttribute;
import java.awt.font.TextHitInfo;
import java.awt.im.InputMethodHighlight;
import java.awt.im.spi.InputMethod;
import java.awt.im.spi.InputMethodContext;
import java.io.InputStream;
import java.io.IOException;
import java.text.AttributedString;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Locale;
import java.util.Properties;
import java.util.Vector;
import java.text.MessageFormat;
public class CityInputMethod implements InputMethod {
private static Locale YOMI = new Locale("ja", "JP", "YOMI");
private static Locale[] SUPPORTED_LOCALES = {
Locale.ENGLISH, Locale.GERMAN,
Locale.JAPANESE, YOMI,
Locale.SIMPLIFIED_CHINESE, Locale.TRADITIONAL_CHINESE
};
private static Locale[] LOOKUP_LOCALES = {
Locale.ENGLISH, Locale.GERMAN,
Locale.JAPANESE, YOMI,
Locale.CHINESE,
Locale.SIMPLIFIED_CHINESE, Locale.TRADITIONAL_CHINESE
};
// lookup tables - shared by all instances of this input method
private static Properties cityNames;
private static Properties cityAliases;
private static Properties cityLanguages;
private static Properties templates;
// windows - shared by all instances of this input method
private static Window statusWindow;
// current or last statusWindow owner instance
private static CityInputMethod statusWindowOwner;
// true if Solaris style; false if PC style
private static boolean attachedStatusWindow = false;
// remember the statusWindow location per instance
private Rectangle clientWindowLocation;
// status window location in PC style
private static Point globalStatusWindowLocation;
// keep live city input method instances (synchronized using statusWindow)
private static HashSet cityInputMethodInstances = new HashSet(5);
// lookup information - per instance
private String[] lookupCandidates;
private Locale[] lookupLocales;
private int lookupCandidateCount;
private LookupList lookupList;
private int lookupSelection;
// per-instance state
InputMethodContext inputMethodContext;
private boolean active;
private boolean disposed;
private Locale locale;
private boolean converted;
private StringBuffer rawText;
private String convertedText;
private int insertionPoint;
private String[] rawTextSegs = null;
private String[] convertedSegs = null;
private String fmt = null;
private int fieldPos[][] = null;
private int segPos[][] = null;
private int selectedSeg = 0;
private int numSegs = 0;
private int committedSeg = -1;
private int previouslyCommittedCharacterCount = 0;
public CityInputMethod() throws IOException {
initializeTables();
rawText = new StringBuffer();
}
public void setInputMethodContext(InputMethodContext context) {
inputMethodContext = context;
if (statusWindow == null) {
Window sw = context.createInputMethodWindow("City Input Method", false);
Label label = new Label();
label.setForeground(Color.black);
label.setBackground(Color.white);
synchronized (this.getClass()) {
if (statusWindow == null) {
statusWindow = sw;
statusWindow.addComponentListener(new ComponentListener() {
public void componentResized(ComponentEvent e) {}
public void componentMoved(ComponentEvent e) {
synchronized (statusWindow) {
if (!attachedStatusWindow) {
Component comp = e.getComponent();
if (comp.isVisible()) {
globalStatusWindowLocation = comp.getLocation();
}
}
}
}
public void componentShown(ComponentEvent e) {}
public void componentHidden(ComponentEvent e) {}
});
label.addMouseListener(new MouseListener() {
public void mouseClicked(MouseEvent e) {
int count = e.getClickCount();
if (count >= 2) {
toggleStatusWindowStyle();
}
}
public void mousePressed(MouseEvent e) {}
public void mouseReleased(MouseEvent e) {}
public void mouseEntered(MouseEvent e) {}
public void mouseExited(MouseEvent e) {}
});
statusWindow.add(label);
statusWindowOwner = this;
updateStatusWindow(locale);
label.setSize(200, 50);
statusWindow.pack();
}
}
}
inputMethodContext.enableClientWindowNotification(this, attachedStatusWindow);
synchronized (statusWindow) {
cityInputMethodInstances.add(this);
}
}
public boolean setLocale(Locale locale) {
for (int i = 0; i < SUPPORTED_LOCALES.length; i++) {
if (locale.equals(SUPPORTED_LOCALES[i])) {
this.locale = locale;
if (statusWindow != null) {
updateStatusWindow(locale);
}
return true;
}
}
return false;
}
public Locale getLocale() {
return locale;
}
void updateStatusWindow(Locale locale) {
synchronized (statusWindow) {
Label label = (Label) statusWindow.getComponent(0);
String localeName = locale == null ? "null" : locale.getDisplayName();
String text = "Current locale: " + localeName;
if (!label.getText().equals(text)) {
label.setText(text);
statusWindow.pack();
}
if (attachedStatusWindow) {
if (clientWindowLocation != null) {
statusWindow.setLocation(clientWindowLocation.x,
clientWindowLocation.y + clientWindowLocation.height);
}
} else {
setPCStyleStatusWindow();
}
}
}
private void setPCStyleStatusWindow() {
synchronized (statusWindow) {
if (globalStatusWindowLocation == null) {
Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
globalStatusWindowLocation = new Point(d.width - statusWindow.getWidth(),
d.height - statusWindow.getHeight() - 25);
}
statusWindow.setLocation(globalStatusWindowLocation.x, globalStatusWindowLocation.y);
}
}
private void setStatusWindowForeground(Color fg) {
synchronized (statusWindow) {
if (statusWindowOwner != this) {
return;
}
Label label = (Label) statusWindow.getComponent(0);
label.setForeground(fg);
}
}
private void toggleStatusWindowStyle() {
synchronized (statusWindow) {
if (attachedStatusWindow) {
attachedStatusWindow = false;
setPCStyleStatusWindow();
} else {
attachedStatusWindow = true;
}
Iterator itr = cityInputMethodInstances.iterator();
while (itr.hasNext()) {
CityInputMethod im = (CityInputMethod)itr.next();
im.inputMethodContext.enableClientWindowNotification(im, attachedStatusWindow);
}
}
}
public void setCharacterSubsets(Character.Subset[] subsets) {
// ignore
}
public void reconvert() {
// not supported yet
throw new UnsupportedOperationException();
}
public void dispatchEvent(AWTEvent event) {
if (!active && (event instanceof KeyEvent)) {
System.out.println("CityInputMethod.dispatch called with KeyEvent while not active");
}
if (disposed) {
System.out.println("CityInputMethod.dispatch called after being disposed");
}
if (!(event instanceof InputEvent)) {
System.out.println("CityInputMethod.dispatch called with event that's not an InputEvent");
}
if (event.getID() == KeyEvent.KEY_RELEASED) {
if (lookupList != null) { // if candidate window is active
KeyEvent e = (KeyEvent) event;
if (e.isControlDown()) {
if (e.getKeyCode() == KeyEvent.VK_DOWN) {
// Control + Arrow Down commits chunks
closeLookupWindow();
commit(selectedSeg);
e.consume();
}
} else {
// select candidate by Arrow Up/Down
if (e.getKeyCode() == KeyEvent.VK_DOWN) {
if (++lookupSelection == lookupCandidateCount) {
lookupSelection = 0;
}
selectCandidate(lookupSelection);
e.consume();
} else if (e.getKeyCode() == KeyEvent.VK_UP) {
if (--lookupSelection < 0) {
lookupSelection = lookupCandidateCount;
}
selectCandidate(lookupSelection);
e.consume();
}
}
} else {
if (event.getID() == KeyEvent.KEY_RELEASED) {
KeyEvent e = (KeyEvent) event;
if (e.isControlDown()) {
if (e.getKeyCode() == KeyEvent.VK_DOWN) {
// Control + Arrow Down commits chunks
commit(selectedSeg);
e.consume();
}
} else {
// move selected segment by Arrow Right/Left
if ((e.getKeyCode() == KeyEvent.VK_RIGHT) && (converted == true)) {
if (selectedSeg < (numSegs - 1)) {
selectedSeg++;
sendText(false);
e.consume();
} else {
Toolkit.getDefaultToolkit().beep();
}
} else if ((e.getKeyCode() == KeyEvent.VK_LEFT) && (converted == true)) {
if (selectedSeg > (committedSeg + 1)) {
selectedSeg--;
sendText(false);
e.consume();
} else {
Toolkit.getDefaultToolkit().beep();
}
}
}
}
}
}
if (event.getID() == MouseEvent.MOUSE_CLICKED) {
MouseEvent e = (MouseEvent) event;
Component comp = e.getComponent();
Point pnt = comp.getLocationOnScreen();
int x = (int)pnt.getX() + e.getX();
int y = (int)pnt.getY() + e.getY();
TextHitInfo hit = inputMethodContext.getLocationOffset(x,y);
if (hit != null) {
// within composed text
if (converted) {
selectedSeg = findSegment(hit.getInsertionIndex());
sendText(false);
e.consume();
} else {
insertionPoint = hit.getInsertionIndex();
}
} else {
// if hit outside composition, simply commit all.
commitAll();
}
}
if (event.getID() == KeyEvent.KEY_TYPED) {
KeyEvent e = (KeyEvent) event;
if (handleCharacter(e.getKeyChar())) {
e.consume();
}
}
}
/**
* find segment at insertion point
*/
int findSegment(int insertion) {
for (int i = committedSeg + 1; i < numSegs; i++) {
if ((segPos[i][0] < insertion) && (insertion < segPos[i][1])) {
return i;
}
}
return 0;
}
public void activate() {
if (active) {
System.out.println("CityInputMethod.activate called while active");
}
active = true;
synchronized (statusWindow) {
statusWindowOwner = this;
updateStatusWindow(locale);
if (!statusWindow.isVisible()) {
statusWindow.setVisible(true);
}
setStatusWindowForeground(Color.black);
}
}
public void deactivate(boolean isTemporary) {
closeLookupWindow();
if (!active) {
System.out.println("CityInputMethod.deactivate called while not active");
}
setStatusWindowForeground(Color.lightGray);
active = false;
}
public void hideWindows() {
if (active) {
System.out.println("CityInputMethod.hideWindows called while active");
}
closeLookupWindow();
synchronized (statusWindow) {
if (statusWindowOwner == this) {
statusWindow.setVisible(false);
}
}
}
public void removeNotify() {
}
public void endComposition() {
if (rawText.length() != 0) {
commitAll();
}
closeLookupWindow();
}
public void notifyClientWindowChange(Rectangle location) {
clientWindowLocation = location;
synchronized (statusWindow) {
if (!attachedStatusWindow || statusWindowOwner != this) {
return;
}
if (location != null) {
statusWindow.setLocation(location.x, location.y+location.height);
if (!statusWindow.isVisible()) {
if (active) {
setStatusWindowForeground(Color.black);
} else {
setStatusWindowForeground(Color.lightGray);
}
statusWindow.setVisible(true);
}
} else {
statusWindow.setVisible(false);
}
}
}
public void dispose() {
if (active) {
System.out.println("CityInputMethod.dispose called while active");
}
if (disposed) {
System.out.println("CityInputMethod.disposed called repeatedly");
}
closeLookupWindow();
synchronized (statusWindow) {
cityInputMethodInstances.remove(this);
}
disposed = true;
}
public Object getControlObject() {
return null;
}
public void setCompositionEnabled(boolean enable) {
// not supported yet
throw new UnsupportedOperationException();
}
public boolean isCompositionEnabled() {
// always enabled
return true;
}
private void initializeTables() throws IOException {
synchronized (this.getClass()) {
if (templates == null) {
cityNames = loadProperties("names.properties");
cityAliases = loadProperties("aliases.properties");
cityLanguages = loadProperties("languages.properties");
templates = loadProperties("templates.properties");
}
}
}
private Properties loadProperties(String fileName) throws IOException {
Properties props = new Properties();
InputStream stream = this.getClass().getResourceAsStream(fileName);
props.load(stream);
stream.close();
return props;
}
/**
* Attempts to handle a typed character.
* @return whether the character was handled
*/
private boolean handleCharacter(char ch) {
if (lookupList != null) {
if (ch == ' ') {
if (++lookupSelection == lookupCandidateCount) {
lookupSelection = 0;
}
selectCandidate(lookupSelection);
return true;
} else if (ch == '\n') {
commitAll();
closeLookupWindow();
return true;
} else if ('1' <= ch && ch <= '0' + lookupCandidateCount) {
selectCandidate(ch - '1');
closeLookupWindow();
return true;
} else {
Toolkit.getDefaultToolkit().beep();
return true;
}
} else if (converted) {
if (ch == ' ') {
convertAgain();
return true;
} else if (ch == '\n') {
commitAll();
return true;
} else {
Toolkit.getDefaultToolkit().beep();
return true;
}
} else {
if (ch == ' ') {
int length = rawText.length();
if (length == 3 || length == 6 || length == 9) {
convertFirstTime();
return true;
}
} else if (ch == '\n') {
if (rawText.length() != 0) {
commitAll();
return true;
}
} else if (ch == '\b') {
if (insertionPoint > 0) {
rawText.deleteCharAt(insertionPoint - 1);
--insertionPoint;
sendText(false);
return true;
}
} else if ('a' <= ch && ch <= 'z' || 'A' <= ch && ch <= 'Z') {
rawText.insert(insertionPoint++, ch);
sendText(false);
return true;
}
if (rawText.length() != 0) {
Toolkit.getDefaultToolkit().beep();
return true;
}
}
return false;
}
/*
* Looks up the entry for key in the given table, taken the
* input method's locale into consideration.
*/
String lookup(String lookupName, Properties table) {
String result = null;
String localeLookupName = lookupName + "_" + locale;
while (true) {
result = (String) table.get(localeLookupName);
if (result != null) {
break;
}
int index = localeLookupName.lastIndexOf("_");
if (index == -1) {
break;
}
localeLookupName = localeLookupName.substring(0, index);
}
return result;
}
String findAlias(String lookupName) {
lookupName = lookupName.toUpperCase();
return cityAliases.getProperty(lookupName, lookupName);
}
void convertFirstTime() {
numSegs = rawText.length() / 3;
rawTextSegs = new String[numSegs];
convertedSegs = new String[numSegs];
for (int i = 0; i < numSegs; ++i) {
rawTextSegs[i] = rawText.substring(i * 3, (i + 1) *3);
String alias = findAlias(rawTextSegs[i]);
String result = lookup(alias, cityNames);
if (result != null) {
convertedSegs[i] = result;
} else {
convertedSegs[i] = rawText.substring(i * 3, (i + 1) * 3);
}
}
converted = true;
sendText(false);
}
void convertAgain() {
String lookupName;
lookupName = rawTextSegs[selectedSeg];
// if converted string is same as original, it's not in word list. We skip
// further conversion.
if (!lookupName.equals(convertedSegs[selectedSeg])) {
lookupName = findAlias(lookupName);
lookupCandidates = new String[LOOKUP_LOCALES.length];
lookupLocales = new Locale[LOOKUP_LOCALES.length];
lookupCandidateCount = 0;
lookupSelection = 0;
for (int i = 0; i < LOOKUP_LOCALES.length; i++) {
Locale iLocale = LOOKUP_LOCALES[i];
String localeLookupName = lookupName + '_' + iLocale;
String localeConvertedText = (String) cityNames.get(localeLookupName);
if (localeConvertedText != null) {
lookupCandidates[lookupCandidateCount] = localeConvertedText;
lookupLocales[lookupCandidateCount] = iLocale;
lookupCandidateCount++;
} else if (iLocale.equals(Locale.ENGLISH)) {
localeConvertedText = (String) cityNames.get(lookupName);
if (localeConvertedText != null) {
lookupCandidates[lookupCandidateCount] = localeConvertedText;
lookupLocales[lookupCandidateCount] = iLocale;
lookupCandidateCount++;
}
}
if (convertedSegs[selectedSeg].equals(localeConvertedText)) {
lookupSelection = lookupCandidateCount - 1;
}
}
openLookupWindow();
} else {
Toolkit.getDefaultToolkit().beep();
}
}
/* commits all chunks up to the specified index */
private void commit(int index) {
if (index >= (numSegs - 1)) {
// if this is the last segment, commit all
commitAll();
} else {
committedSeg = index;
selectedSeg = committedSeg + 1;
sendText(true);
}
}
/* commits all chunks */
void commitAll() {
committedSeg = numSegs - 1;
sendText(true);
// once composed text is committed, reinitialize all variables
rawText.setLength(0);
convertedText = null;
converted = false;
rawTextSegs = null;
convertedSegs = null;
fmt = null;
fieldPos = null;
segPos = null;
selectedSeg = 0;
insertionPoint = rawText.length();
numSegs = 0;
committedSeg = -1;
previouslyCommittedCharacterCount = 0;
}
void parseFormat() {
Vector vec = new Vector();
int[] elem = null;
for(int i = 0; i < fmt.length(); i++) {
if (fmt.charAt(i) == '{') {
elem = new int[2];
elem[0] = i;
} else if (fmt.charAt(i) == '}') {
elem[1] = i;
vec.add(elem);
}
}
if (vec.size() != 0) {
fieldPos = new int[vec.size()][];
vec.toArray(fieldPos);
}
}
void formatOutput() {
if (fmt == null) {
String key = "Template" + Integer.toString(numSegs);
fmt = lookup(key, templates);
parseFormat();
}
convertedText = MessageFormat.format(fmt, (Object [])convertedSegs);
// Figure out converted segment position
int errors = 0;
segPos = new int[fieldPos.length][2];
for (int i = 0; i < fieldPos.length; i++) {
int optLen = (fieldPos[i][1] - fieldPos[i][0]) + 1;
int diffs = convertedSegs[i].length() - optLen;
segPos[i][0] = fieldPos[i][0] + errors;
segPos[i][1] = segPos[i][0] + convertedSegs[i].length();
errors += diffs;
}
}
void sendText(boolean committed) {
AttributedString as = null;
TextHitInfo caret = null;
int committedCharacterCount = 0;
int newTotalCommittedCharacterCount = previouslyCommittedCharacterCount;
if (converted) {
formatOutput();
if (committed) {
if (committedSeg == (numSegs - 1)) {
newTotalCommittedCharacterCount = convertedText.length();
} else {
newTotalCommittedCharacterCount = segPos[committedSeg + 1][0];
}
committedCharacterCount = newTotalCommittedCharacterCount - previouslyCommittedCharacterCount;
}
as = new AttributedString(convertedText.substring(previouslyCommittedCharacterCount));
for(int i = committedSeg + 1; i < numSegs; i++) {
InputMethodHighlight highlight;
if (i == selectedSeg) {
highlight = InputMethodHighlight.SELECTED_CONVERTED_TEXT_HIGHLIGHT;
} else {
highlight = InputMethodHighlight.UNSELECTED_CONVERTED_TEXT_HIGHLIGHT;
}
as.addAttribute(TextAttribute.INPUT_METHOD_HIGHLIGHT, highlight,
segPos[i][0] - previouslyCommittedCharacterCount,
segPos[i][1] - previouslyCommittedCharacterCount);
}
previouslyCommittedCharacterCount = newTotalCommittedCharacterCount;
} else {
as = new AttributedString(rawText.toString());
if (committed) {
committedCharacterCount = rawText.length();
} else if (rawText.length() != 0) {
as.addAttribute(TextAttribute.INPUT_METHOD_HIGHLIGHT,
InputMethodHighlight.SELECTED_RAW_TEXT_HIGHLIGHT);
caret = TextHitInfo.leading(insertionPoint);
}
}
inputMethodContext.dispatchInputMethodEvent(
InputMethodEvent.INPUT_METHOD_TEXT_CHANGED,
as.getIterator(),
committedCharacterCount,
caret,
null);
}
void selectCandidate(int candidate) {
lookupSelection = candidate;
lookupList.selectCandidate(lookupSelection);
convertedSegs[selectedSeg] = lookupCandidates[lookupSelection];
sendText(false);
}
int getSelectedSegmentOffset() {
return segPos[selectedSeg][0] - previouslyCommittedCharacterCount;
}
void openLookupWindow() {
lookupList = new LookupList(this, inputMethodContext,
lookupCandidates, lookupLocales, lookupCandidateCount);
lookupList.selectCandidate(lookupSelection);
}
void closeLookupWindow() {
if (lookupList != null) {
lookupList.setVisible(false);
lookupList = null;
}
}
}
class LookupList extends Canvas {
CityInputMethod inputMethod;
InputMethodContext context;
Window lookupWindow;
String[] candidates;
Locale[] locales;
int candidateCount;
int selected;
final int INSIDE_INSET = 4;
final int LINE_SPACING = 18;
LookupList(CityInputMethod inputMethod, InputMethodContext context,
String[] candidates, Locale[] locales, int candidateCount) {
this.inputMethod = inputMethod;
this.context = context;
this.candidates = candidates;
this.locales = locales;
this.candidateCount = candidateCount;
lookupWindow = context.createInputMethodWindow("Lookup Window", true);
setFont(new Font("Dialog", Font.PLAIN, 12));
setSize(200, candidateCount * LINE_SPACING + 2 * INSIDE_INSET);
setForeground(Color.black);
setBackground(Color.white);
enableEvents(AWTEvent.KEY_EVENT_MASK);
enableEvents(AWTEvent.MOUSE_EVENT_MASK);
lookupWindow.add(this);
lookupWindow.pack();
updateWindowLocation();
lookupWindow.setVisible(true);
}
/**
* Positions the lookup window near (usually below) the
* insertion point in the component where composition occurs.
*/
private void updateWindowLocation() {
Point windowLocation = new Point();
int textOffset = inputMethod.getSelectedSegmentOffset();
Rectangle caretRect = context.getTextLocation(TextHitInfo.leading(textOffset));
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
Dimension windowSize = lookupWindow.getSize();
final int SPACING = 2;
if (caretRect.x + windowSize.width > screenSize.width) {
windowLocation.x = screenSize.width - windowSize.width;
} else {
windowLocation.x = caretRect.x;
}
if (caretRect.y + caretRect.height + SPACING + windowSize.height > screenSize.height) {
windowLocation.y = caretRect.y - SPACING - windowSize.height;
} else {
windowLocation.y = caretRect.y + caretRect.height + SPACING;
}
lookupWindow.setLocation(windowLocation);
}
void selectCandidate(int candidate) {
selected = candidate;
repaint();
}
public void paint(Graphics g) {
FontMetrics metrics = g.getFontMetrics();
int descent = metrics.getDescent();
int ascent = metrics.getAscent();
for (int i = 0; i < candidateCount; i++) {
g.drawString((i + 1) + " " + candidates[i] +
" (" + locales[i].getDisplayName() + ")",
INSIDE_INSET, LINE_SPACING * (i + 1) + INSIDE_INSET - descent);
}
Dimension size = getSize();
g.drawRect(INSIDE_INSET / 2,
LINE_SPACING * ( selected + 1) + INSIDE_INSET - (descent + ascent + 1),
size.width - INSIDE_INSET,
descent + ascent + 2);
g.drawRect(0, 0, size.width - 1, size.height - 1);
}
public void setVisible(boolean visible) {
if (!visible) {
lookupWindow.setVisible(false);
lookupWindow.dispose();
lookupWindow = null;
}
super.setVisible(visible);
}
protected void processKeyEvent(KeyEvent event) {
inputMethod.dispatchEvent(event);
}
protected void processMouseEvent(MouseEvent event) {
if (event.getID() == MouseEvent.MOUSE_PRESSED) {
int y = event.getY();
if (y >= INSIDE_INSET && y < INSIDE_INSET + candidateCount * LINE_SPACING) {
inputMethod.selectCandidate((y - INSIDE_INSET) / LINE_SPACING);
inputMethod.closeLookupWindow();
}
}
}
}
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