| /* |
| * Copyright (c) 1997, 2008, Oracle and/or its affiliates. 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.awt.im; |
| |
| import java.awt.AWTEvent; |
| import java.awt.Color; |
| import java.awt.Dimension; |
| import java.awt.FontMetrics; |
| import java.awt.Graphics; |
| import java.awt.Graphics2D; |
| import java.awt.Point; |
| import java.awt.Rectangle; |
| import java.awt.Toolkit; |
| import java.awt.event.InputMethodEvent; |
| import java.awt.event.InputMethodListener; |
| import java.awt.event.WindowEvent; |
| import java.awt.event.WindowAdapter; |
| import java.awt.font.FontRenderContext; |
| import java.awt.font.TextHitInfo; |
| import java.awt.font.TextLayout; |
| import java.awt.geom.Rectangle2D; |
| import java.awt.im.InputMethodRequests; |
| import java.text.AttributedCharacterIterator; |
| import javax.swing.JFrame; |
| import javax.swing.JPanel; |
| import javax.swing.border.LineBorder; |
| |
| /** |
| * A composition area is used to display text that's being composed |
| * using an input method in its own user interface environment, |
| * typically in a root window. |
| * |
| * @author JavaSoft International |
| */ |
| |
| // This class is final due to the 6607310 fix. Refer to the CR for details. |
| public final class CompositionArea extends JPanel implements InputMethodListener { |
| |
| private CompositionAreaHandler handler; |
| |
| private TextLayout composedTextLayout; |
| private TextHitInfo caret = null; |
| private JFrame compositionWindow; |
| private final static int TEXT_ORIGIN_X = 5; |
| private final static int TEXT_ORIGIN_Y = 15; |
| private final static int PASSIVE_WIDTH = 480; |
| private final static int WIDTH_MARGIN=10; |
| private final static int HEIGHT_MARGIN=3; |
| |
| CompositionArea() { |
| // create composition window with localized title |
| String windowTitle = Toolkit.getProperty("AWT.CompositionWindowTitle", "Input Window"); |
| compositionWindow = |
| (JFrame)InputMethodContext.createInputMethodWindow(windowTitle, null, true); |
| |
| setOpaque(true); |
| setBorder(LineBorder.createGrayLineBorder()); |
| setForeground(Color.black); |
| setBackground(Color.white); |
| |
| // if we get the focus, we still want to let the client's |
| // input context handle the event |
| enableInputMethods(true); |
| enableEvents(AWTEvent.KEY_EVENT_MASK); |
| |
| compositionWindow.getContentPane().add(this); |
| compositionWindow.addWindowListener(new FrameWindowAdapter()); |
| addInputMethodListener(this); |
| compositionWindow.enableInputMethods(false); |
| compositionWindow.pack(); |
| Dimension windowSize = compositionWindow.getSize(); |
| Dimension screenSize = (getToolkit()).getScreenSize(); |
| compositionWindow.setLocation(screenSize.width - windowSize.width-20, |
| screenSize.height - windowSize.height-100); |
| compositionWindow.setVisible(false); |
| } |
| |
| /** |
| * Sets the composition area handler that currently owns this |
| * composition area, and its input context. |
| */ |
| synchronized void setHandlerInfo(CompositionAreaHandler handler, InputContext inputContext) { |
| this.handler = handler; |
| ((InputMethodWindow) compositionWindow).setInputContext(inputContext); |
| } |
| |
| /** |
| * @see java.awt.Component#getInputMethodRequests |
| */ |
| public InputMethodRequests getInputMethodRequests() { |
| return handler; |
| } |
| |
| // returns a 0-width rectangle |
| private Rectangle getCaretRectangle(TextHitInfo caret) { |
| int caretLocation = 0; |
| TextLayout layout = composedTextLayout; |
| if (layout != null) { |
| caretLocation = Math.round(layout.getCaretInfo(caret)[0]); |
| } |
| Graphics g = getGraphics(); |
| FontMetrics metrics = null; |
| try { |
| metrics = g.getFontMetrics(); |
| } finally { |
| g.dispose(); |
| } |
| return new Rectangle(TEXT_ORIGIN_X + caretLocation, |
| TEXT_ORIGIN_Y - metrics.getAscent(), |
| 0, metrics.getAscent() + metrics.getDescent()); |
| } |
| |
| public void paint(Graphics g) { |
| super.paint(g); |
| g.setColor(getForeground()); |
| TextLayout layout = composedTextLayout; |
| if (layout != null) { |
| layout.draw((Graphics2D) g, TEXT_ORIGIN_X, TEXT_ORIGIN_Y); |
| } |
| if (caret != null) { |
| Rectangle rectangle = getCaretRectangle(caret); |
| g.setXORMode(getBackground()); |
| g.fillRect(rectangle.x, rectangle.y, 1, rectangle.height); |
| g.setPaintMode(); |
| } |
| } |
| |
| // shows/hides the composition window |
| void setCompositionAreaVisible(boolean visible) { |
| compositionWindow.setVisible(visible); |
| } |
| |
| // returns true if composition area is visible |
| boolean isCompositionAreaVisible() { |
| return compositionWindow.isVisible(); |
| } |
| |
| // workaround for the Solaris focus lost problem |
| class FrameWindowAdapter extends WindowAdapter { |
| public void windowActivated(WindowEvent e) { |
| requestFocus(); |
| } |
| } |
| |
| // InputMethodListener methods - just forward to the current handler |
| public void inputMethodTextChanged(InputMethodEvent event) { |
| handler.inputMethodTextChanged(event); |
| } |
| |
| public void caretPositionChanged(InputMethodEvent event) { |
| handler.caretPositionChanged(event); |
| } |
| |
| /** |
| * Sets the text and caret to be displayed in this composition area. |
| * Shows the window if it contains text, hides it if not. |
| */ |
| void setText(AttributedCharacterIterator composedText, TextHitInfo caret) { |
| composedTextLayout = null; |
| if (composedText == null) { |
| // there's no composed text to display, so hide the window |
| compositionWindow.setVisible(false); |
| this.caret = null; |
| } else { |
| /* since we have composed text, make sure the window is shown. |
| This is necessary to get a valid graphics object. See 6181385. |
| */ |
| if (!compositionWindow.isVisible()) { |
| compositionWindow.setVisible(true); |
| } |
| |
| Graphics g = getGraphics(); |
| |
| if (g == null) { |
| return; |
| } |
| |
| try { |
| updateWindowLocation(); |
| |
| FontRenderContext context = ((Graphics2D)g).getFontRenderContext(); |
| composedTextLayout = new TextLayout(composedText, context); |
| Rectangle2D bounds = composedTextLayout.getBounds(); |
| |
| this.caret = caret; |
| |
| // Resize the composition area to just fit the text. |
| FontMetrics metrics = g.getFontMetrics(); |
| Rectangle2D maxCharBoundsRec = metrics.getMaxCharBounds(g); |
| int newHeight = (int)maxCharBoundsRec.getHeight() + HEIGHT_MARGIN; |
| int newFrameHeight = newHeight +compositionWindow.getInsets().top |
| +compositionWindow.getInsets().bottom; |
| // If it's a passive client, set the width always to PASSIVE_WIDTH (480px) |
| InputMethodRequests req = handler.getClientInputMethodRequests(); |
| int newWidth = (req==null) ? PASSIVE_WIDTH : (int)bounds.getWidth() + WIDTH_MARGIN; |
| int newFrameWidth = newWidth + compositionWindow.getInsets().left |
| + compositionWindow.getInsets().right; |
| setPreferredSize(new Dimension(newWidth, newHeight)); |
| compositionWindow.setSize(new Dimension(newFrameWidth, newFrameHeight)); |
| |
| // show the composed text |
| paint(g); |
| } |
| finally { |
| g.dispose(); |
| } |
| } |
| } |
| |
| /** |
| * Sets the caret to be displayed in this composition area. |
| * The text is not changed. |
| */ |
| void setCaret(TextHitInfo caret) { |
| this.caret = caret; |
| if (compositionWindow.isVisible()) { |
| Graphics g = getGraphics(); |
| try { |
| paint(g); |
| } finally { |
| g.dispose(); |
| } |
| } |
| } |
| |
| /** |
| * Positions the composition window near (usually below) the |
| * insertion point in the client component if the client |
| * component is an active client (below-the-spot input). |
| */ |
| void updateWindowLocation() { |
| InputMethodRequests req = handler.getClientInputMethodRequests(); |
| if (req == null) { |
| // not an active client |
| return; |
| } |
| |
| Point windowLocation = new Point(); |
| |
| Rectangle caretRect = req.getTextLocation(null); |
| Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize(); |
| Dimension windowSize = compositionWindow.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; |
| } |
| |
| compositionWindow.setLocation(windowLocation); |
| } |
| |
| // support for InputMethodRequests methods |
| Rectangle getTextLocation(TextHitInfo offset) { |
| Rectangle rectangle = getCaretRectangle(offset); |
| Point location = getLocationOnScreen(); |
| rectangle.translate(location.x, location.y); |
| return rectangle; |
| } |
| |
| TextHitInfo getLocationOffset(int x, int y) { |
| TextLayout layout = composedTextLayout; |
| if (layout == null) { |
| return null; |
| } else { |
| Point location = getLocationOnScreen(); |
| x -= location.x + TEXT_ORIGIN_X; |
| y -= location.y + TEXT_ORIGIN_Y; |
| if (layout.getBounds().contains(x, y)) { |
| return layout.hitTestChar(x, y); |
| } else { |
| return null; |
| } |
| } |
| } |
| |
| // Disables or enables decorations of the composition window |
| void setCompositionAreaUndecorated(boolean setUndecorated){ |
| if (compositionWindow.isDisplayable()){ |
| compositionWindow.removeNotify(); |
| } |
| compositionWindow.setUndecorated(setUndecorated); |
| compositionWindow.pack(); |
| } |
| |
| } |