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1
55
56 package org.apache.bsf.engines.javascript;
57
58
63
64 import java.util.Hashtable  ;
65
66 import org.apache.bsf.*;
67 import org.apache.bsf.debug.jsdi.*;
68 import org.mozilla.javascript.*;
69 import org.mozilla.javascript.debug.*;
70
71 import java.rmi.RemoteException ;
72
73 public class RhinoContextProxy {
74
75 RhinoEngineDebugger m_reDbg;
76 Context m_context;
77 JsContextStub m_contextStub;
78
79 DebuggableEngine m_engine;
80
81 boolean m_atBreakpoint;
82 int m_frameCount;
83 JsContextStub m_frames[];
84
85 private static final int NO_STEP = 0, STEP_IN = 1, STEP_OVER = 2,
86 STEP_OUT = 3, STOP_ENGINE = 4, RUNNING = 5;
87
88 private int m_stepCmd, m_stepDepth;
89
90 RhinoContextProxy(RhinoEngineDebugger reDbg, Context cx) {
91 m_reDbg = reDbg;
92 m_context = cx;
93 m_engine = cx.getDebuggableEngine();
94 }
95
96 public void cancelStepping() {
97 m_stepCmd = NO_STEP;
98 m_stepDepth = -1;
99 m_engine.setBreakNextLine(false);
100 }
101
102 public JsContextStub getContext(int depth) {
103 return m_frames[depth];
104 }
105
106 public int getContextCount() {
107 return m_frameCount;
108 }
109
110 public JsContextStub getFrame(int no) {
111 if (no < 0 || no > m_frameCount)
112 return null;
113 if (no == m_frameCount)
114 return m_contextStub;
115 else
116 return m_frames[no];
117 }
118
119 public int getLineNumber() {
120 DebugFrame frame = m_engine.getFrame(0);
121
122 return frame.getLineNumber();
123 }
124
125 public RhinoEngineDebugger getRhinoEngineDebugger() {
126 return m_reDbg;
127 }
128
129 String getSourceName() {
130 DebugFrame frame = m_engine.getFrame(0);
131
132 return frame.getSourceName();
133 }
134
135
136 public JsContextStub hitBreakpoint() throws RemoteException {
140 cancelStepping();
141 updateStack();
142 return m_frames[0];
143 }
144
145
146 public JsContextStub exceptionThrown() throws RemoteException {
147 cancelStepping();
148 updateStack();
149 return m_frames[0];
150 }
151
152 public void resumed() {
153 JsContextStub stub;
154 DebugFrame frame;
155
156 m_atBreakpoint = false;
157
158 for (int f = 0; f < m_frameCount; f++) {
159 stub = m_frames[f];
160 stub.atBreakpoint(false);
161 }
162 }
163
164 public void run() {
165 m_engine.setBreakNextLine(false);
166 m_stepCmd = RUNNING;
167 m_stepDepth = -1;
168
169 }
170
171 public void stepIn() {
172 m_engine.setBreakNextLine(true);
173 m_stepCmd = STEP_IN;
174 m_stepDepth = m_frameCount;
175 }
176
177 public void stepOut() {
178 m_engine.setBreakNextLine(true);
179 m_stepCmd = STEP_OUT;
180 m_stepDepth = m_frameCount;
181
182 }
183
184 public void stepOver() {
185 m_engine.setBreakNextLine(true);
186 m_stepCmd = STEP_OVER;
187 m_stepDepth = m_frameCount;
188 }
189
190 public JsContextStub entry_exit_mode() throws RemoteException {
191 cancelStepping();
192 updateStack();
193 return m_frames[0];
194 }
195
196 public JsContextStub stepping() {
197
199 int frameCount = m_engine.getFrameCount();
200
201 try {
202 switch (m_stepCmd) {
203 case NO_STEP :
204 cancelStepping();
205 break;
206 case STOP_ENGINE :
207 updateStack();
208 cancelStepping();
209 return m_frames[0];
210 case STEP_IN :
211 if ((frameCount >= m_stepDepth)
217 || (frameCount < m_stepDepth)) {
218 updateStack();
219 cancelStepping();
220 return m_frames[0];
221 }
222 break;
223 case STEP_OVER :
224 if (frameCount <= m_stepDepth) {
229 updateStack();
230 cancelStepping();
231 return m_frames[0];
232 }
233 break;
234 case STEP_OUT :
235 if (frameCount < m_stepDepth) {
237 updateStack();
238 cancelStepping();
239 return m_frames[0];
240 }
241 break;
242 default :
243 throw new Error ("Unknown command.");
244 }
245 } catch (Throwable t) {
246 t.printStackTrace();
247 cancelStepping();
248 }
249 return null;
250 }
251
252 public void stopEngine() {
253 m_engine.setBreakNextLine(true);
254 m_stepCmd = STOP_ENGINE;
255 m_stepDepth = -1;
256 }
257
258 public void updateStack() throws RemoteException {
259 JsContextStub frames[];
260 JsContextStub stub;
261 DebugFrame frame;
262 int nf, of, frameCount;
263
264 m_atBreakpoint = true;
265
266 frameCount = m_engine.getFrameCount();
267 frames = new JsContextStub[frameCount];
268
269
280 for (nf = frameCount - 1, of = m_frameCount - 1;
281 nf >= 0 && of >= 0;
282 nf--, of--) {
283 frame = m_engine.getFrame(nf);
284 if (frame == m_frames[of].m_frame) {
285 frames[nf] = m_frames[of];
286 } else
287 break;
288 }
289 for (; of >= 0; of--) {
293 m_reDbg.dropStub(m_frames[of].m_frame);
294 m_frames[of].invalidate();
295 }
296 for (; nf >= 0; nf--) {
297 frame = m_engine.getFrame(nf);
298 frames[nf] = new JsContextStub(this, frame, nf);
299 }
300 m_frames = frames;
301 m_frameCount = frameCount;
302 }
303 }
304 |
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