Source Code Cross Referenced for Region.java in  » IDE » J » org » armedbear » j » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » IDE » J » org.armedbear.j 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Region.java
003:         *
004:         * Copyright (C) 1998-2002 Peter Graves
005:         * $Id: Region.java,v 1.2 2003/03/20 15:23:42 piso Exp $
006:         *
007:         * This program is free software; you can redistribute it and/or
008:         * modify it under the terms of the GNU General Public License
009:         * as published by the Free Software Foundation; either version 2
010:         * of the License, or (at your option) any later version.
011:         *
012:         * This program is distributed in the hope that it will be useful,
013:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
014:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
015:         * GNU General Public License for more details.
016:         *
017:         * You should have received a copy of the GNU General Public License
018:         * along with this program; if not, write to the Free Software
019:         * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
020:         */
021:
022:        package org.armedbear.j;
023:
024:        import java.util.List;
025:
026:        public final class Region implements  Constants {
027:            private final Buffer buffer;
028:            private final Position begin;
029:            private final Line beginLine;
030:            private final int beginOffset;
031:            private Position end;
032:            private Line endLine;
033:            private int endOffset;
034:            private boolean isColumnRegion;
035:            private int beginCol = -1;
036:            private int endCol = -1;
037:
038:            // It is not necessary that pos1 come before pos2; we figure that out on
039:            // the fly.
040:            public Region(Buffer buffer, Position pos1, Position pos2) {
041:                this .buffer = buffer;
042:                if (buffer.needsRenumbering())
043:                    buffer.renumber();
044:                if (pos1.isBefore(pos2)) {
045:                    begin = new Position(pos1);
046:                    end = new Position(pos2);
047:                } else {
048:                    begin = new Position(pos2);
049:                    end = new Position(pos1);
050:                }
051:                beginLine = begin.getLine();
052:                beginOffset = begin.getOffset();
053:                endLine = end.getLine();
054:                endOffset = end.getOffset();
055:            }
056:
057:            public Region(Editor editor) {
058:                this (editor.getBuffer(), editor.getMark(), editor.getDot());
059:                if (editor.isColumnSelection()) {
060:                    isColumnRegion = true;
061:                    if (begin.equals(editor.getMark())) {
062:                        beginCol = buffer.getCol(begin);
063:                        endCol = editor.getDisplay().getAbsoluteCaretCol();
064:                    } else {
065:                        beginCol = editor.getDisplay().getAbsoluteCaretCol();
066:                        endCol = buffer.getCol(end);
067:                    }
068:                }
069:            }
070:
071:            public final Buffer getBuffer() {
072:                return buffer;
073:            }
074:
075:            public final Position getBegin() {
076:                return begin;
077:            }
078:
079:            public final Line getBeginLine() {
080:                return beginLine;
081:            }
082:
083:            public final int getBeginLineNumber() {
084:                return beginLine.lineNumber();
085:            }
086:
087:            public final int getBeginOffset() {
088:                return beginOffset;
089:            }
090:
091:            public final int getBeginCol() {
092:                if (beginCol < 0)
093:                    beginCol = buffer.getCol(begin);
094:                return beginCol;
095:            }
096:
097:            public final Position getEnd() {
098:                return end;
099:            }
100:
101:            public final void setEnd(Position pos) {
102:                end = pos;
103:                endLine = end.getLine();
104:                endOffset = end.getOffset();
105:                endCol = -1;
106:            }
107:
108:            public final Line getEndLine() {
109:                return endLine;
110:            }
111:
112:            public final int getEndLineNumber() {
113:                return endLine.lineNumber();
114:            }
115:
116:            public final int getEndOffset() {
117:                return endOffset;
118:            }
119:
120:            public final void setEndOffset(int offset) {
121:                end.setOffset(offset);
122:                endOffset = offset;
123:            }
124:
125:            public final int getEndCol() {
126:                if (endCol < 0)
127:                    endCol = buffer.getCol(end);
128:                return endCol;
129:            }
130:
131:            public final boolean isColumnRegion() {
132:                return isColumnRegion;
133:            }
134:
135:            public final boolean isLineRegion() {
136:                return beginOffset == 0 && endOffset == 0;
137:            }
138:
139:            public String toString() {
140:                if (beginLine == endLine)
141:                    return beginLine.substring(beginOffset, endOffset);
142:
143:                FastStringBuffer sb = new FastStringBuffer();
144:                if (isColumnRegion) {
145:                    for (Line line = beginLine; line != null; line = line
146:                            .next()) {
147:                        sb.append(getTextInRegion(line));
148:                        sb.append('\n');
149:                        if (line == getEndLine())
150:                            break;
151:                    }
152:                } else {
153:                    sb.append(beginLine.substring(beginOffset));
154:                    sb.append('\n');
155:                    Line line = beginLine.next();
156:                    while (line != endLine && line != null) {
157:                        sb.append(line.getText());
158:                        sb.append('\n');
159:                        line = line.next();
160:                    }
161:                    if (line == endLine)
162:                        sb.append(line.substring(0, endOffset));
163:                }
164:                return sb.toString();
165:            }
166:
167:            private String getTextInRegion(Line line) {
168:                String text = Utilities.detab(line.getText(), buffer
169:                        .getTabWidth());
170:                if (text.length() > getEndCol())
171:                    return text.substring(getBeginCol(), getEndCol());
172:                else if (text.length() > getBeginCol())
173:                    return text.substring(getBeginCol());
174:                else
175:                    return "";
176:            }
177:
178:            public boolean adjustMarker(Position pos) {
179:                if (pos == null)
180:                    return false;
181:                final Line line = pos.getLine();
182:                final int offset = pos.getOffset();
183:                if (line == null)
184:                    return false;
185:                if (line == beginLine) {
186:                    if (line == endLine && offset > endOffset) {
187:                        pos.setOffset(offset - (endOffset - beginOffset));
188:                        return true;
189:                    }
190:                    if (offset > beginOffset) {
191:                        pos.setOffset(beginOffset);
192:                        return true;
193:                    }
194:                    return false;
195:                }
196:                if (line == endLine) {
197:                    if (offset <= endOffset)
198:                        pos.moveTo(begin);
199:                    else
200:                        pos.moveTo(beginLine, beginOffset + offset - endOffset);
201:                    return true;
202:                }
203:                if (pos.lineNumber() > begin.lineNumber()
204:                        && pos.lineNumber() < end.lineNumber()) {
205:                    pos.moveTo(begin);
206:                    return true;
207:                }
208:                return false;
209:            }
210:
211:            private void adjustMarkers() {
212:                if (Editor.getEditorCount() > 1) {
213:                    for (EditorIterator it = new EditorIterator(); it.hasNext();) {
214:                        Editor ed = it.nextEditor();
215:                        if (ed == Editor.currentEditor())
216:                            continue;
217:                        if (ed.getBuffer() == buffer) {
218:                            // Buffer is displayed in another frame.
219:                            if (adjustMarker(ed.getDot()))
220:                                ed.moveCaretToDotCol();
221:                            if (adjustMarker(ed.getMark()))
222:                                ed.setMark(null); // Not taking any chances.
223:                            Position top = new Position(ed.getTopLine(), 0);
224:                            if (adjustMarker(top)) {
225:                                ed.setTopLine(top.getLine());
226:                                ed.setUpdateFlag(REPAINT);
227:                            }
228:                        } else {
229:                            // Not presently displayed, but possibly in a stored view...
230:                            View view = (View) ed.views.get(buffer);
231:                            if (view != null) {
232:                                adjustMarker(view.dot);
233:                                if (adjustMarker(view.mark))
234:                                    view.mark = null;
235:                                if (view.topLine != null) {
236:                                    Position top = new Position(view.topLine, 0);
237:                                    if (adjustMarker(top))
238:                                        view.topLine = top.getLine();
239:                                }
240:                            }
241:                        }
242:                    }
243:                }
244:                List markers = Marker.getAllMarkers();
245:                for (int i = markers.size(); i-- > 0;) {
246:                    Marker m = (Marker) markers.get(i);
247:                    if (m != null && m.getBuffer() == buffer)
248:                        adjustMarker(m.getPosition());
249:                }
250:            }
251:
252:            public void delete() {
253:                adjustMarkers();
254:                try {
255:                    buffer.lockWrite();
256:                } catch (InterruptedException e) {
257:                    Log.error(e);
258:                    return;
259:                }
260:                try {
261:                    final String head = beginLine.substring(0, beginOffset);
262:                    final String tail = endLine.substring(endOffset);
263:                    if (beginLine == endLine) {
264:                        beginLine.setText(head.concat(tail));
265:                    } else {
266:                        FastStringBuffer sb = new FastStringBuffer();
267:                        for (Line line = beginLine; line != null; line = line
268:                                .next()) {
269:                            // Skip new lines since we just want the original text.
270:                            if (line != endLine && !line.isNew()) {
271:                                if (sb.length() > 0)
272:                                    sb.append('\n');
273:                                String s = line.getOriginalText();
274:                                sb.append(s != null ? s : line.getText());
275:                            } else if (line == endLine) {
276:                                if (!line.isNew()) {
277:                                    if (sb.length() > 0)
278:                                        sb.append('\n');
279:                                    String s = line.getOriginalText();
280:                                    sb.append(s != null ? s : line.getText());
281:                                }
282:                                break;
283:                            }
284:                        }
285:                        beginLine.setText(head.concat(tail));
286:                        beginLine.setOriginalText(sb.toString());
287:                        // Make adjustments so revertLines() will work correctly...
288:                        if (beginLine.isNew()) {
289:                            if (beginLine.getText().equals(
290:                                    beginLine.getOriginalText())) {
291:                                beginLine.setNew(false);
292:                                beginLine.setOriginalText(null);
293:                            }
294:                        }
295:                        Line nextLine = endLine.next();
296:                        beginLine.setNext(nextLine);
297:                        if (nextLine != null)
298:                            nextLine.setPrevious(beginLine);
299:                        buffer.needsRenumbering = true;
300:                    }
301:                    buffer.modified();
302:                } finally {
303:                    buffer.unlockWrite();
304:                }
305:            }
306:        }
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