Source Code Cross Referenced for VHDLMode.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:         * VHDLMode.java
003:         *
004:         * Copyright (C) 2002 Peter Graves
005:         * $Id: VHDLMode.java,v 1.1.1.1 2002/09/24 16:08:58 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 gnu.regexp.RE;
025:        import gnu.regexp.UncheckedRE;
026:        import java.awt.event.KeyEvent;
027:
028:        public final class VHDLMode extends AbstractMode implements  Constants,
029:                Mode {
030:            private static final VHDLMode mode = new VHDLMode();
031:
032:            private VHDLMode() {
033:                super (VHDL_MODE, VHDL_MODE_NAME);
034:                keywords = new Keywords(this );
035:            }
036:
037:            public static VHDLMode getMode() {
038:                return mode;
039:            }
040:
041:            public String getCommentStart() {
042:                return "-- ";
043:            }
044:
045:            public Formatter getFormatter(Buffer buffer) {
046:                return new VHDLFormatter(buffer);
047:            }
048:
049:            public boolean isKeyword(String s) {
050:                return keywords.isKeyword(s.toLowerCase());
051:            }
052:
053:            protected void setKeyMapDefaults(KeyMap km) {
054:                km.mapKey(KeyEvent.VK_ENTER, 0, "newlineAndIndent");
055:                km.mapKey(KeyEvent.VK_T, CTRL_MASK, "findTag");
056:                km.mapKey(KeyEvent.VK_PERIOD, ALT_MASK, "findTagAtDot");
057:                km.mapKey(KeyEvent.VK_F12, 0, "wrapComment");
058:                // Duplicate mapping to support IBM 1.3 for Linux.
059:                km.mapKey(0xffc9, 0, "wrapComment"); // F12
060:            }
061:
062:            public boolean isTaggable() {
063:                return true;
064:            }
065:
066:            public Tagger getTagger(SystemBuffer buffer) {
067:                return new VHDLTagger(buffer);
068:            }
069:
070:            public boolean canIndent() {
071:                return true;
072:            }
073:
074:            public boolean canIndentPaste() {
075:                return false;
076:            }
077:
078:            private static final RE beginRE = new UncheckedRE("^begin\\s");
079:            private static final RE thenRE = new UncheckedRE("\\s+then$");
080:            private static final RE loopRE = new UncheckedRE("\\s+loop$");
081:
082:            public int getCorrectIndentation(Line line, Buffer buffer) {
083:                final int indentSize = buffer.getIndentSize();
084:                final Line model = findModel(line);
085:                if (model == null)
086:                    return 0;
087:                final int modelIndent = buffer.getIndentation(model);
088:                final String modelTrim = trimSyntacticWhitespace(model);
089:
090:                if (modelTrim.equals("begin")
091:                        || beginRE.getMatch(modelTrim) != null) {
092:                    // Model starts with "begin".
093:                    return modelIndent + indentSize;
094:                }
095:                if (modelTrim.equals("then")
096:                        || thenRE.getMatch(modelTrim) != null) {
097:                    // Model ends with "then".
098:                    return modelIndent + indentSize;
099:                }
100:                if (modelTrim.equals("loop")
101:                        || loopRE.getMatch(modelTrim) != null) {
102:                    // Model ends with "loop".
103:                    return modelIndent + indentSize;
104:                }
105:
106:                return modelIndent;
107:            }
108:
109:            private Line findModel(Line line) {
110:                Line model = line.previous();
111:                while (model != null && model.isBlank())
112:                    model = model.previous();
113:                return model;
114:            }
115:
116:            // Replaces syntactic whitespace (quotes and comments) with actual space
117:            // characters and returns trimmed string.
118:            private static String trimSyntacticWhitespace(Line line) {
119:                VHDLSyntaxIterator it = new VHDLSyntaxIterator(null);
120:                return new String(it.hideSyntacticWhitespace(line.getText()))
121:                        .trim();
122:            }
123:
124:            public boolean isIdentifierStart(char c) {
125:                return startChars.indexOf(c) >= 0;
126:            }
127:
128:            public boolean isIdentifierPart(char c) {
129:                return partChars.indexOf(c) >= 0;
130:            }
131:
132:            private static final String startChars = "`ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
133:
134:            private static final String partChars = "`ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_";
135:        }
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