Source Code Cross Referenced for Display.java in  » Testing » KeY » de » uka » ilkd » key » ocl » gf » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Testing » KeY » de.uka.ilkd.key.ocl.gf 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        //Copyright (c) Hans-Joachim Daniels 2005
002:        //
003:        //This program is free software; you can redistribute it and/or modify
004:        //it under the terms of the GNU General Public License as published by
005:        //the Free Software Foundation; either version 2 of the License, or
006:        //(at your option) any later version.
007:        //
008:        //This program is distributed in the hope that it will be useful,
009:        //but WITHOUT ANY WARRANTY; without even the implied warranty of
010:        //MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
011:        //GNU General Public License for more details.
012:        //
013:        //You can either finde the file LICENSE or LICENSE.TXT in the source 
014:        //distribution or in the .jar file of this application
015:
016:        package de.uka.ilkd.key.ocl.gf;
017:
018:        import java.awt.Font;
019:        import java.awt.Rectangle;
020:        import java.util.Vector;
021:
022:        import javax.swing.JEditorPane;
023:
024:        /**
025:         * @author daniels
026:         * Takes care of collecting the linearized text and the length calculations
027:         */
028:        class Display {
029:            /**
030:             * If the linearization should be displayed as pure text
031:             */
032:            private boolean doText;
033:            /**
034:             * If the linearization should be displayed as HTML
035:             */
036:            private boolean doHtml;
037:            /** 
038:             * collects the linearization after each append.
039:             * what's in here are Strings 
040:             */
041:            private Vector linStagesHtml = new Vector();
042:            /** 
043:             * collects the linearization after each append.
044:             * what's in here are Strings 
045:             */
046:            private Vector linStagesText = new Vector();
047:            /** 
048:             * Is used to calculate the length of a HTML snipplet.
049:             * This pane is not displayed in hope to avoid any actual renderings
050:             * which would just slow the length calculation down.
051:             * Perhaps that's an abuse ...
052:             * And perhaps this pane is not needed
053:             */
054:            private JEditorPane htmlLengthPane = new JEditorPane();
055:
056:            /** 
057:             * initializes this object, nothing special 
058:             * @param dt 1 if only text is to be shown, 2 for only HTML, 3 for both.
059:             * Other values are forbidden.
060:             */
061:            public Display(int dt) {
062:                setDisplayType(dt);
063:                this .htmlLengthPane.setContentType("text/html");
064:                this .htmlLengthPane.setEditable(false);
065:            }
066:
067:            /**
068:             * (de-)activates display of text and HTML according to dt
069:             * @param dt 1 if only text is to be shown, 2 for only HTML, 3 for both.
070:             */
071:            protected void setDisplayType(int dt) {
072:                switch (dt) {
073:                case 1:
074:                    doText = true;
075:                    doHtml = false;
076:                    break;
077:                case 2:
078:                    doText = false;
079:                    doHtml = true;
080:                    break;
081:                case 3:
082:                    doText = true;
083:                    doHtml = true;
084:                    break;
085:                default:
086:                    doText = true;
087:                    doHtml = true;
088:                    break;
089:                }
090:            }
091:
092:            /**
093:             * Resets the stored text, but leaves the scroll markers untouched.
094:             */
095:            public void resetLin() {
096:                linStagesHtml.clear();
097:                linStagesText.clear();
098:                htmlLengthPane.setText("");
099:            }
100:
101:            /**
102:             * @param font The Font, that is to be used. If null, the default of JTextPane is taken.
103:             * @return the collected HTML text, that has been added to this object.
104:             * <html> tags are wrapped around the result, if not already there.
105:             */
106:            protected String getHtml(Font font) {
107:                if (!doHtml) {
108:                    return "";
109:                }
110:                String result;
111:                if (this .linStagesHtml.size() > 0) {
112:                    String fontface;
113:                    if (font != null) {
114:                        //fontface = " style=\"font-size:" + font.getSize()+ "pt\""; 
115:                        fontface = " style=\"font: " + font.getSize() + "pt "
116:                                + font.getName() + "\"";
117:                    } else {
118:                        fontface = "";
119:                    }
120:                    result = "<html><body"
121:                            + fontface
122:                            + ">"
123:                            + this .linStagesHtml.get(
124:                                    this .linStagesHtml.size() - 1).toString()
125:                            + "</body></html>";
126:                } else {
127:                    result = "";
128:                }
129:                return result;
130:            }
131:
132:            /**
133:             * @return The collected pure text, that has been added to this object.
134:             */
135:            protected String getText() {
136:                if (!doText) {
137:                    return "";
138:                }
139:                String result;
140:                if (this .linStagesText.size() > 0) {
141:                    result = this .linStagesText.lastElement().toString();
142:                } else {
143:                    result = "";
144:                }
145:                return result;
146:            }
147:
148:            /**
149:             * Appends the given text to the respective fields from
150:             * where it can be displayed later
151:             * @param text The pure text that is to be appended.
152:             * @param html The HTML text that is to be appended. 
153:             * Most likely the same as text
154:             */
155:            protected void addToStages(final String text, final String html) {
156:                //add to HTML
157:                if (doHtml) {
158:                    final String newStageHtml;
159:                    if (this .linStagesHtml.size() > 0) {
160:                        newStageHtml = this .linStagesHtml
161:                                .get(this .linStagesHtml.size() - 1)
162:                                + html;
163:                    } else {
164:                        newStageHtml = html;
165:                    }
166:                    this .linStagesHtml.add(newStageHtml);
167:                }
168:
169:                //add to Text
170:                if (doText) {
171:                    final String newStageText;
172:                    if (this .linStagesText.size() > 0) {
173:                        newStageText = linStagesText
174:                                .get(linStagesText.size() - 1)
175:                                + text;
176:                    } else {
177:                        newStageText = text;
178:                    }
179:                    this .linStagesText.add(newStageText);
180:                }
181:            }
182:
183:            /**
184:             * Adds toAdd to both the pure text as the HTML fields, they are inherently the same, 
185:             * since they are mapped to the same position in the AST.
186:             * On the way of adding, some length calculations are done, which are used to
187:             * create an HtmlMarkedArea object, which is ready to be used in GFEditor2.
188:             * @param toAdd The String that the to-be-produced MarkedArea should represent
189:             * @param position The position String in Haskell notation
190:             * @param language the language of the current linearization
191:             * @return the HtmlMarkedArea object that represents the given information
192:             * and knows about its beginning and end in the display areas.
193:             */
194:            protected MarkedArea addAsMarked(String toAdd,
195:                    LinPosition position, String language) {
196:                /** the length of the displayed HTML before the current append */
197:                int oldLengthHtml = 0;
198:                if (doHtml) {
199:                    if (this .linStagesHtml.size() > 0) {
200:                        // is still in there. Does not absolutely need to be
201:                        // cached in a global variable
202:                        oldLengthHtml = this .htmlLengthPane.getDocument()
203:                                .getLength();
204:                    } else {
205:                        oldLengthHtml = 0;
206:                    }
207:                }
208:                /** the length of the text before the current append */
209:                int oldLengthText = 0;
210:                if (doText) {
211:                    if (this .linStagesText.size() > 0) {
212:                        // is still in there. Does not absolutely need to be
213:                        // cached in a global variable
214:                        oldLengthText = this .linStagesText.lastElement()
215:                                .toString().length();
216:                    } else {
217:                        oldLengthText = 0;
218:                    }
219:                }
220:                addToStages(toAdd, toAdd);
221:                //calculate beginning and end
222:                //for HTML
223:                int newLengthHtml = 0;
224:                if (doHtml) {
225:                    final String newStageHtml = this .linStagesHtml
226:                            .lastElement().toString();
227:                    final String newHtml = Printname.htmlPrepend(newStageHtml,
228:                            "");
229:                    //yeah, daniels admits, this IS expensive
230:                    this .htmlLengthPane.setText(newHtml);
231:                    newLengthHtml = htmlLengthPane.getDocument().getLength();
232:                    if (newLengthHtml < oldLengthHtml) {
233:                        newLengthHtml = oldLengthHtml;
234:                    }
235:                }
236:                //for text
237:                int newLengthText = 0;
238:                if (doText) {
239:                    newLengthText = this .linStagesText.lastElement().toString()
240:                            .length();
241:                }
242:                final MarkedArea hma = new MarkedArea(oldLengthText,
243:                        newLengthText, position, toAdd, oldLengthHtml,
244:                        newLengthHtml, language);
245:                return hma;
246:            }
247:
248:            /**
249:             * To store the scroll state of the pure text linearization area
250:             */
251:            Rectangle recText = new Rectangle();
252:            /**
253:             * To store the scroll state of the HTML linearization area
254:             */
255:            Rectangle recHtml = new Rectangle();
256:            /**
257:             * To store the scroll state of the pure text linearization area
258:             */
259:            int scrollText = 0;
260:            /**
261:             * To store the scroll state of the HTML linearization area
262:             */
263:            int scrollHtml = 0;
264:
265:            public String toString() {
266:                return getText();
267:            }
268:        }
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