Source Code Cross Referenced for SwingWindow.java in  » Scripting » Kawa » gnu » jemacs » swing » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Scripting » Kawa » gnu.jemacs.swing 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        // Copyright (c) 2002  Per M.A. Bothner.
002:        // This is free software;  for terms and warranty disclaimer see ./COPYING.
003:
004:        package gnu.jemacs.swing;
005:
006:        import gnu.jemacs.buffer.*;
007:
008:        import java.awt.event.FocusEvent;
009:        import java.awt.event.KeyEvent;
010:        import javax.swing.*;
011:        import javax.swing.text.*;
012:        import java.awt.*;
013:        import java.util.Hashtable;
014:
015:        /** An Emacs window (EWindow) implemented using the Swing toolkits. */
016:
017:        public class SwingWindow extends EWindow implements 
018:                java.awt.event.FocusListener, java.awt.event.KeyListener,
019:                javax.swing.event.ChangeListener {
020:            /* Map JTextPane to SwingWindow. */
021:            static Hashtable panemap = new Hashtable();
022:
023:            JTextPane jtextpane;
024:            /** The panel that contains this window and the modeline. */
025:            JPanel panel;
026:            JScrollPane scrollPane;
027:
028:            public Modeline modeline;
029:
030:            public SwingWindow(Buffer buffer) {
031:                this (buffer, true);
032:            }
033:
034:            /** Create new Window.
035:             * @param buffer the Buffer containing the data.
036:             * @param wantModeline true if we should create a mode line
037:             */
038:            public SwingWindow(Buffer buffer, boolean wantModeline) {
039:                super (null);
040:                jtextpane = new JTextPane(((SwingBuffer) buffer).doc);
041:                panemap.put(jtextpane, this );
042:                if (wantModeline)
043:                    modeline = new Modeline(this ,
044:                            ((SwingBuffer) buffer).modelineDocument);
045:                this .buffer = buffer;
046:                jtextpane.addFocusListener(this );
047:                jtextpane.addKeyListener(this );
048:            }
049:
050:            /** Warp this (and optional modeline) inside a ScrollPane in a new JPanel. */
051:            public JPanel wrap() {
052:                BorderLayout layout = new BorderLayout();
053:                JPanel panel = new JPanel(layout);
054:                scrollPane = new JScrollPane(jtextpane,
055:                        JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
056:                        JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
057:                panel.add(scrollPane, BorderLayout.CENTER);
058:                if (modeline != null)
059:                    panel.add(modeline, BorderLayout.SOUTH);
060:                this .panel = panel;
061:                return panel;
062:            }
063:
064:            /** Get the JPanel containing this Window. */
065:            public JPanel getPanel() {
066:                return panel;
067:            }
068:
069:            public void focusGained(FocusEvent e) {
070:                setSelected();
071:            }
072:
073:            public void focusLost(FocusEvent e) {
074:            }
075:
076:            public void requestFocus() {
077:                jtextpane.requestFocus();
078:            }
079:
080:            public void setBuffer(Buffer buffer) {
081:                if (this .buffer == buffer)
082:                    return;
083:
084:                super .setBuffer(buffer);
085:                jtextpane.setDocument(((SwingBuffer) buffer).doc);
086:                if (modeline != null)
087:                    modeline
088:                            .setDocument(((SwingBuffer) buffer).modelineDocument);
089:                EWindow selected = getSelected();
090:                if (selected == this ) {
091:                    unselect();
092:                    // Change buffer's pointMarker so it follows this EWindow's Caret.
093:                    Caret caret = jtextpane.getCaret();
094:                    caret.setDot(buffer.getDot());
095:                    select(caret);
096:                }
097:            }
098:
099:            public void unselect() {
100:                Caret caret = ((SwingBuffer) buffer).curPosition;
101:                if (caret == null)
102:                    return;
103:                int point = caret.getDot();
104:                int index = ((SwingBuffer) buffer).content.buffer.createPos(
105:                        point, true);
106:                buffer.pointMarker.ipos = index;
107:                ((SwingBuffer) buffer).curPosition = null;
108:                jtextpane.getCaret().removeChangeListener(this );
109:                // ?? selected = null;
110:            }
111:
112:            public void setSelected() {
113:                super .setSelected();
114:                select(jtextpane.getCaret());
115:            }
116:
117:            public int getPoint() {
118:                return 1 + jtextpane.getCaret().getDot();
119:            }
120:
121:            public void setDot(int offset) {
122:                jtextpane.getCaret().setDot(offset);
123:            }
124:
125:            public EWindow split(Buffer buffer, int lines, boolean horizontal) {
126:                SwingWindow window = new SwingWindow(buffer);
127:                EFrame frame = this .frame;
128:                window.frame = frame;
129:                linkSibling(window, horizontal);
130:                window.modeline = new Modeline(window,
131:                        ((SwingBuffer) buffer).modelineDocument);
132:
133:                JPanel panel = this .getPanel();
134:                java.awt.Dimension oldSize = panel.getSize();
135:                java.awt.Container oldParent = panel.getParent();
136:                oldParent.remove(panel);
137:                JSplitPane split = new JSplitPane(
138:                        horizontal ? JSplitPane.HORIZONTAL_SPLIT
139:                                : JSplitPane.VERTICAL_SPLIT, panel, window
140:                                .wrap());
141:                split.setDividerSize(2);
142:                // FIXME - use lines.
143:                split.setDividerLocation((horizontal ? oldSize.width
144:                        : oldSize.height) / 2);
145:                oldParent.add(split);
146:                oldParent.validate();
147:                if (this  == EWindow.getSelected())
148:                    this .requestFocus();
149:                return window;
150:            }
151:
152:            private void select(Caret caret) {
153:                // Change buffer's pointMarker so it follows this EWindow's Caret.
154:                ((SwingBuffer) buffer).curPosition = caret;
155:                if (!buffer.pointMarker.isPoint())
156:                    ((SwingBuffer) buffer).content.buffer
157:                            .releasePos(buffer.pointMarker.ipos);
158:                buffer.pointMarker.sequence = null;
159:                caret.addChangeListener(this );
160:            }
161:
162:            public void stateChanged(javax.swing.event.ChangeEvent e) {
163:                Object source = e.getSource();
164:                if (source instanceof  Caret && buffer != null) {
165:                    Caret caret = (Caret) source;
166:                    int mark = caret.getMark();
167:                    int dot = caret.getDot();
168:                    if (mark != dot) {
169:                        buffer.markMarker.set(buffer, mark);
170:                    }
171:                }
172:            }
173:
174:            public static JTextPane getContainedWindow(Container cont,
175:                    boolean last) {
176:                for (;;) {
177:                    if (cont instanceof  JTextPane)
178:                        return (JTextPane) cont;
179:                    if (cont instanceof  JScrollPane)
180:                        cont = (Container) ((JScrollPane) cont).getViewport()
181:                                .getView();
182:                    else if (cont instanceof  JFrame)
183:                        cont = ((JFrame) cont).getContentPane();
184:                    else if (cont instanceof  JSplitPane) {
185:                        JSplitPane split = (JSplitPane) cont;
186:                        cont = (Container) (last ? split.getRightComponent()
187:                                : split.getLeftComponent());
188:                    } else {
189:                        int count = cont.getComponentCount();
190:                        if (count == 0)
191:                            return null;
192:                        cont = (Container) cont.getComponent(last ? (count - 1)
193:                                : 0);
194:                    }
195:                }
196:            }
197:
198:            /*
199:            public SwingWindow getNextWindow(boolean forwards)
200:            {
201:              Container prev = this;
202:              for (;;)
203:                {
204:                  Container parent = prev.getParent();
205:                  if (parent == null)
206:                    return null;
207:                  if (parent instanceof JSplitPane)
208:                    {
209:                      JSplitPane split =(JSplitPane) parent;
210:                      if (prev == split.getLeftComponent())
211:                        {
212:                          if (forwards)
213:                            return getFirstWindow((Container) split.getRightComponent());
214:                        }
215:                      else // prev == split.getRightComponent():
216:                        {
217:                          if (!forwards)
218:                            return getLastWindow((Container) split.getLeftComponent());
219:                        }
220:                    }
221:                  prev = parent;
222:                }
223:            }
224:             */
225:
226:            public static SwingWindow getWindow(java.awt.event.ActionEvent event) {
227:                // Maybe use TextAction.getTextComponent instead? FIXME.
228:                Component component = (Component) event.getSource();
229:                for (;;) {
230:                    if (component instanceof  JTextPane)
231:                        return (SwingWindow) panemap.get(component);
232:                    component = component.getParent();
233:                }
234:            }
235:
236:            protected void deleteNoValidate() {
237:                super .deleteNoValidate();
238:                if (modeline != null)
239:                    panel.remove(modeline);
240:                panel.remove(scrollPane);
241:
242:                // Mow remove the Panel from its parent.
243:                Container oldParent = panel.getParent();
244:                if (oldParent instanceof  JSplitPane) {
245:                    JSplitPane split = (JSplitPane) oldParent;
246:                    Component other;
247:                    if (panel == split.getLeftComponent())
248:                        other = split.getRightComponent();
249:                    else
250:                        other = split.getLeftComponent();
251:                    split.remove(jtextpane);
252:                    split.remove(other);
253:                    // In the JSplitPane's parent, replace the JSplitPane by just other 
254:                    Container splitParent = split.getParent();
255:                    if (splitParent instanceof  JSplitPane) {
256:                        JSplitPane outerSplit = (JSplitPane) splitParent;
257:                        if (split == outerSplit.getLeftComponent())
258:                            outerSplit.setLeftComponent(other);
259:                        else
260:                            outerSplit.setRightComponent(other);
261:                    } else {
262:                        splitParent.remove(split);
263:                        splitParent.add(other);
264:                    }
265:                } else
266:                    oldParent.remove(panel);
267:
268:                panemap.remove(jtextpane);
269:                jtextpane = null;
270:                panel = null;
271:                scrollPane = null;
272:            }
273:
274:            public void activateRegion() {
275:                System.err.println("(activateRegions)");
276:                Caret caret = jtextpane.getCaret();
277:                caret.setDot(buffer.markMarker.getOffset());
278:                caret.moveDot(buffer.getDot());
279:            }
280:
281:            public Dimension getPreferredScrollableViewportSize() {
282:                Dimension size = panel.getSize();
283:                if (modeline != null)
284:                    size = new Dimension(size.width, size.height
285:                            - modeline.getPreferredSize().height);
286:                return size;
287:            }
288:
289:            protected void getCharSize() {
290:                java.awt.Font defaultFont = ((SwingBuffer) buffer).doc
291:                        .getFont(SwingBuffer.defaultStyle);
292:                java.awt.FontMetrics fm = jtextpane.getGraphics()
293:                        .getFontMetrics(defaultFont);
294:                charHeight = fm.getHeight();
295:                charWidth = fm.charWidth('m');
296:            }
297:
298:            public int getWidth() {
299:                return jtextpane.getWidth();
300:            }
301:
302:            public int getHeight() {
303:                return jtextpane.getWidth();
304:            }
305:
306:            public void keyTyped(KeyEvent e) {
307:                handle(e, toInt(e, 0));
308:            }
309:
310:            public void keyPressed(KeyEvent e) {
311:                handle(e, toInt(e, EKeymap.PRESSED));
312:            }
313:
314:            public void keyReleased(KeyEvent e) {
315:                handle(e, toInt(e, EKeymap.RELEASED));
316:            }
317:
318:            protected void handle(KeyEvent e, int code) {
319:                Object action = lookupKey(code);
320:
321:                pushPrefix(code);
322:                pendingLength--;
323:
324:                if (action == null || action instanceof  IgnoreAction) {
325:                    e.consume();
326:                    return;
327:                }
328:                handleCommand(action);
329:                e.consume();
330:            }
331:
332:            int toInt(KeyEvent e, int kind) {
333:                int code = e.getKeyCode();
334:                if (code == 0)
335:                    code = e.getKeyChar();
336:                else
337:                    code |= (e.getModifiers() | kind) << 16;
338:                return code;
339:            }
340:
341:            /**
342:             * 
343:             */
344:            void flushPending() {
345:                pendingLength = 0;
346:            }
347:
348:            /**
349:             * @see gnu.jemacs.buffer.EWindow#tooLong(int)
350:             */
351:            public Object tooLong(int pendingLength) {
352:                return new TooLongAction(pendingLength);
353:            }
354:
355:        }
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