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| 1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file |
| 2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
| 3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
| 4 | 4 |
| 5 // Native helpers generated by the compiler | 5 // Native helpers generated by the compiler |
| 6 // TODO(jmesserly): more natives should use this pattern | 6 // TODO(jmesserly): more natives should use this pattern |
| 7 | 7 |
| 8 // Translate a JavaScript exception to a Dart exception | 8 // Translate a JavaScript exception to a Dart exception |
| 9 // TODO(jmesserly): cross browser support. This is Chrome specific. | 9 // TODO(jmesserly): cross browser support. This is Chrome specific. |
| 10 _toDartException(e) native @"""{ | 10 _toDartException(e) native @""" |
| 11 function attachStack(dartEx) { | 11 function attachStack(dartEx) { |
| 12 // TODO(jmesserly): setting the stack property is not a long term solution. | 12 // TODO(jmesserly): setting the stack property is not a long term solution. |
| 13 var stack = e.stack; | 13 var stack = e.stack; |
| 14 // The stack contains the error message, and the stack is all that is | 14 // The stack contains the error message, and the stack is all that is |
| 15 // printed (the exception's toString() is never called). Make the Dart | 15 // printed (the exception's toString() is never called). Make the Dart |
| 16 // exception's toString() be the dominant message. | 16 // exception's toString() be the dominant message. |
| 17 if (typeof stack == 'string') { | 17 if (typeof stack == 'string') { |
| 18 var message = dartEx.toString(); | 18 var message = dartEx.toString(); |
| 19 if (/^(Type|Range)Error:/.test(stack)) { | 19 if (/^(Type|Range)Error:/.test(stack)) { |
| 20 // Indent JS message (it can be helpful) so new message stands out. | 20 // Indent JS message (it can be helpful) so new message stands out. |
| 21 stack = ' (' + stack.substring(0, stack.indexOf('\n')) + ')\n' + | 21 stack = ' (' + stack.substring(0, stack.indexOf('\n')) + ')\n' + |
| 22 stack.substring(stack.indexOf('\n') + 1); | 22 stack.substring(stack.indexOf('\n') + 1); |
| 23 } |
| 24 stack = message + '\n' + stack; |
| 25 } |
| 26 dartEx.stack = stack; |
| 27 return dartEx; |
| 28 } |
| 29 |
| 30 if (e instanceof TypeError) { |
| 31 switch(e.type) { |
| 32 case 'property_not_function': |
| 33 case 'called_non_callable': |
| 34 if (e.arguments[0] == null) { |
| 35 return attachStack(new NullPointerException()); |
| 36 } else { |
| 37 return attachStack(new ObjectNotClosureException()); |
| 23 } | 38 } |
| 24 stack = message + '\n' + stack; | 39 break; |
| 25 } | 40 case 'non_object_property_call': |
| 26 dartEx.stack = stack; | 41 case 'non_object_property_load': |
| 27 return dartEx; | 42 return attachStack(new NullPointerException()); |
| 43 break; |
| 44 case 'undefined_method': |
| 45 if (e.arguments[0] == 'call' || e.arguments[0] == 'apply') { |
| 46 return attachStack(new ObjectNotClosureException()); |
| 47 } else { |
| 48 // TODO(jmesserly): can this ever happen? |
| 49 // sra: Yes, seen on '$add'. |
| 50 return attachStack(new NoSuchMethodException('', e.arguments[0], [])); |
| 51 } |
| 52 break; |
| 28 } | 53 } |
| 29 | 54 } else if (e instanceof RangeError) { |
| 30 if (e instanceof TypeError) { | 55 if (e.message.indexOf('call stack') >= 0) { |
| 31 switch(e.type) { | 56 return attachStack(new StackOverflowException()); |
| 32 case 'property_not_function': | |
| 33 case 'called_non_callable': | |
| 34 if (e.arguments[0] == null) { | |
| 35 return attachStack(new NullPointerException()); | |
| 36 } else { | |
| 37 return attachStack(new ObjectNotClosureException()); | |
| 38 } | |
| 39 break; | |
| 40 case 'non_object_property_call': | |
| 41 case 'non_object_property_load': | |
| 42 return attachStack(new NullPointerException()); | |
| 43 break; | |
| 44 case 'undefined_method': | |
| 45 if (e.arguments[0] == 'call' || e.arguments[0] == 'apply') { | |
| 46 return attachStack(new ObjectNotClosureException()); | |
| 47 } else { | |
| 48 // TODO(jmesserly): can this ever happen? | |
| 49 // sra: Yes, seen on '$add'. | |
| 50 return attachStack(new NoSuchMethodException('', e.arguments[0], [])); | |
| 51 } | |
| 52 break; | |
| 53 } | |
| 54 } else if (e instanceof RangeError) { | |
| 55 if (e.message.indexOf('call stack') >= 0) { | |
| 56 return attachStack(new StackOverflowException()); | |
| 57 } | |
| 58 } | 57 } |
| 59 return e; | 58 } |
| 60 }""" { | 59 return e;""" { |
| 61 // Ensure constructors are generated | 60 // Ensure constructors are generated |
| 62 new ObjectNotClosureException(); | 61 new ObjectNotClosureException(); |
| 63 new NullPointerException(); | 62 new NullPointerException(); |
| 64 new NoSuchMethodException(null, null, null); | 63 new NoSuchMethodException(null, null, null); |
| 65 new StackOverflowException(); | 64 new StackOverflowException(); |
| 66 } | 65 } |
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