Source Code Cross Referenced for VHDLFormatter.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:         * VHDLFormatter.java
003:         *
004:         * Copyright (C) 2002 Peter Graves
005:         * $Id: VHDLFormatter.java,v 1.1.1.1 2002/09/24 16:09:20 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.HashSet;
025:
026:        public final class VHDLFormatter extends Formatter implements  Constants {
027:            private static final int VHDL_FORMAT_TEXT = 0;
028:            private static final int VHDL_FORMAT_COMMENT = 1;
029:            private static final int VHDL_FORMAT_STRING = 2;
030:            private static final int VHDL_FORMAT_IDENTIFIER = 3;
031:            private static final int VHDL_FORMAT_KEYWORD = 4;
032:            private static final int VHDL_FORMAT_TYPE = 5;
033:            private static final int VHDL_FORMAT_FUNCTION = 6;
034:            private static final int VHDL_FORMAT_OPERATOR = 7;
035:            private static final int VHDL_FORMAT_NUMBER = 8;
036:
037:            private static final VHDLMode mode = VHDLMode.getMode();
038:
039:            public VHDLFormatter(Buffer buffer) {
040:                this .buffer = buffer;
041:            }
042:
043:            private int tokenBegin = 0;
044:
045:            private void endToken(String text, int tokenEnd, int state) {
046:                if (tokenEnd - tokenBegin > 0) {
047:                    int format = VHDL_FORMAT_TEXT;
048:                    switch (state) {
049:                    case STATE_NEUTRAL:
050:                        format = VHDL_FORMAT_TEXT;
051:                        break;
052:                    case STATE_QUOTE:
053:                        format = VHDL_FORMAT_STRING;
054:                        break;
055:                    case STATE_IDENTIFIER:
056:                        format = VHDL_FORMAT_IDENTIFIER;
057:                        break;
058:                    case STATE_COMMENT:
059:                        format = VHDL_FORMAT_COMMENT;
060:                        break;
061:                    case STATE_OPERATOR:
062:                        format = VHDL_FORMAT_OPERATOR;
063:                        break;
064:                    case STATE_NUMBER:
065:                        format = VHDL_FORMAT_NUMBER;
066:                        break;
067:                    }
068:                    addSegment(text, tokenBegin, tokenEnd, format);
069:                    tokenBegin = tokenEnd;
070:                }
071:            }
072:
073:            private void parseLine(Line line) {
074:                if (line == null) {
075:                    addSegment("", VHDL_FORMAT_TEXT);
076:                    return;
077:                }
078:                String text;
079:                if (Editor.tabsAreVisible())
080:                    text = Utilities.makeTabsVisible(line.getText(), buffer
081:                            .getTabWidth());
082:                else
083:                    text = Utilities
084:                            .detab(line.getText(), buffer.getTabWidth());
085:                tokenBegin = 0;
086:                int state = STATE_NEUTRAL;
087:                int i = 0;
088:                final int limit = text.length();
089:                // Skip whitespace at start of line.
090:                while (i < limit) {
091:                    if (Character.isWhitespace(text.charAt(i))) {
092:                        ++i;
093:                    } else {
094:                        endToken(text, i, state);
095:                        break;
096:                    }
097:                }
098:                while (i < limit) {
099:                    char c = text.charAt(i);
100:                    if (state == STATE_QUOTE) {
101:                        if (c == '"') {
102:                            endToken(text, i + 1, state);
103:                            state = STATE_NEUTRAL;
104:                        } else if (c == '\\' && i < limit - 1) {
105:                            // Escape char.
106:                            ++i;
107:                        }
108:                        ++i;
109:                        continue;
110:                    }
111:                    // Reaching here, we're not in a comment or a quoted string.
112:                    if (c == '"') {
113:                        endToken(text, i, state);
114:                        state = STATE_QUOTE;
115:                        ++i;
116:                        continue;
117:                    }
118:                    if (c == '-') {
119:                        if (i < limit - 1) {
120:                            if (text.charAt(i + 1) == '-') {
121:                                endToken(text, i, state);
122:                                endToken(text, limit, STATE_COMMENT);
123:                                return;
124:                            } else
125:                                ++i;
126:                        } else
127:                            ++i;
128:                        continue;
129:                    }
130:                    if (isOperatorChar(c)) {
131:                        if (state != STATE_OPERATOR) {
132:                            endToken(text, i, state);
133:                            // Check for keyword.
134:                            final LineSegment segment = getLastSegment();
135:                            if (segment != null) {
136:                                final String segmentText = segment.getText();
137:                                if (isKeyword(segmentText))
138:                                    segment.setFormat(VHDL_FORMAT_KEYWORD);
139:                                else if (isType(segmentText))
140:                                    segment.setFormat(VHDL_FORMAT_TYPE);
141:                            }
142:                            state = STATE_OPERATOR;
143:                        }
144:                        ++i;
145:                        continue;
146:                    }
147:                    if (state == STATE_OPERATOR) {
148:                        if (mode.isIdentifierStart(c)) {
149:                            endToken(text, i, state);
150:                            state = STATE_IDENTIFIER;
151:                        } else if (Character.isDigit(c)) {
152:                            endToken(text, i, state);
153:                            state = STATE_NUMBER;
154:                        } else {
155:                            endToken(text, i, state);
156:                            state = STATE_NEUTRAL;
157:                        }
158:                        ++i;
159:                        continue;
160:                    }
161:                    if (state == STATE_IDENTIFIER) {
162:                        if (!mode.isIdentifierPart(c)) {
163:                            endToken(text, i, state);
164:                            // Check for keyword or function.
165:                            final LineSegment segment = getLastSegment();
166:                            if (segment != null) {
167:                                final String segmentText = segment.getText();
168:                                if (isKeyword(segmentText)) {
169:                                    segment.setFormat(VHDL_FORMAT_KEYWORD);
170:                                } else if (isType(segmentText)) {
171:                                    segment.setFormat(VHDL_FORMAT_TYPE);
172:                                } else if (c == '(') {
173:                                    segment.setFormat(VHDL_FORMAT_FUNCTION);
174:                                } else if (Character.isWhitespace(c)) {
175:                                    // Look ahead to see if next non-whitespace char is '('.
176:                                    int j = i + 1;
177:                                    while (j < limit
178:                                            && Character.isWhitespace(c = text
179:                                                    .charAt(j)))
180:                                        ++j;
181:                                    if (c == '(')
182:                                        segment.setFormat(VHDL_FORMAT_FUNCTION);
183:                                }
184:                            }
185:                            state = STATE_NEUTRAL;
186:                        }
187:                        ++i;
188:                        continue;
189:                    }
190:                    if (state == STATE_NUMBER) {
191:                        if (Character.isDigit(c))
192:                            ;
193:                        else if ((c >= 'a' && c <= 'f')
194:                                || (c >= 'A' && c <= 'F'))
195:                            ; // Hex digits are OK.
196:                        else {
197:                            endToken(text, i, state);
198:                            if (mode.isIdentifierStart(c))
199:                                state = STATE_IDENTIFIER;
200:                            else
201:                                state = STATE_NEUTRAL;
202:                        }
203:                        ++i;
204:                        continue;
205:                    }
206:                    if (state == STATE_NEUTRAL) {
207:                        if (mode.isIdentifierStart(c)) {
208:                            endToken(text, i, state);
209:                            state = STATE_IDENTIFIER;
210:                        } else if (Character.isDigit(c)) {
211:                            endToken(text, i, state);
212:                            state = STATE_NUMBER;
213:                        }
214:                    }
215:                    ++i;
216:                }
217:                // Reached end of line.
218:                endToken(text, i, state);
219:                if (state == STATE_IDENTIFIER) {
220:                    // Last token might be a keyword.
221:                    final LineSegment segment = getLastSegment();
222:                    if (segment != null) {
223:                        final String segmentText = segment.getText();
224:                        if (isKeyword(segmentText))
225:                            segment.setFormat(VHDL_FORMAT_KEYWORD);
226:                        else if (isType(segmentText))
227:                            segment.setFormat(VHDL_FORMAT_TYPE);
228:                    }
229:                }
230:            }
231:
232:            public LineSegmentList formatLine(Line line) {
233:                clearSegmentList();
234:                parseLine(line);
235:                return segmentList;
236:            }
237:
238:            private static final boolean isOperatorChar(char c) {
239:                return "!&|<>=+/*-".indexOf(c) >= 0;
240:            }
241:
242:            public FormatTable getFormatTable() {
243:                if (formatTable == null) {
244:                    formatTable = new FormatTable("VHDLMode");
245:                    formatTable.addEntryFromPrefs(VHDL_FORMAT_TEXT, "text");
246:                    formatTable.addEntryFromPrefs(VHDL_FORMAT_COMMENT,
247:                            "comment");
248:                    formatTable.addEntryFromPrefs(VHDL_FORMAT_STRING, "string");
249:                    formatTable.addEntryFromPrefs(VHDL_FORMAT_IDENTIFIER,
250:                            "identifier", "text");
251:                    formatTable.addEntryFromPrefs(VHDL_FORMAT_KEYWORD,
252:                            "keyword");
253:                    formatTable.addEntryFromPrefs(VHDL_FORMAT_TYPE, "type",
254:                            "preprocessor");
255:                    formatTable.addEntryFromPrefs(VHDL_FORMAT_FUNCTION,
256:                            "function");
257:                    formatTable.addEntryFromPrefs(VHDL_FORMAT_OPERATOR,
258:                            "operator");
259:                    formatTable.addEntryFromPrefs(VHDL_FORMAT_NUMBER, "number");
260:                }
261:                return formatTable;
262:            }
263:
264:            private static boolean isType(String s) {
265:                return getTypes().contains(s.toLowerCase());
266:            }
267:
268:            private static HashSet typeHashSet;
269:
270:            private static HashSet getTypes() {
271:                if (typeHashSet == null) {
272:                    String[] array = types;
273:                    int count = array.length;
274:                    typeHashSet = new HashSet(Math.max(2 * count, 11));
275:                    for (int i = count - 1; i >= 0; i--)
276:                        typeHashSet.add(array[i]);
277:                }
278:                return typeHashSet;
279:            }
280:
281:            private static final String[] types = { "bit", "bit_vector",
282:                    "boolean", "character", "delay_length", "file_open_kind",
283:                    "file_open_status", "integer", "line", "natural",
284:                    "positive", "real", "severity_level", "side", "signed",
285:                    "std_logic", "std_logic_vector", "std_ulogic",
286:                    "std_ulogic_vector", "string", "text", "time", "unsigned" };
287:        }
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