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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, 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 class Printer implements NodeVisitor { | 5 class Printer implements NodeVisitor { |
6 final bool shouldCompressOutput; | 6 final bool shouldCompressOutput; |
7 leg.Compiler compiler; | 7 leg.Compiler compiler; |
8 leg.CodeBuffer outBuffer; | 8 leg.CodeBuffer outBuffer; |
9 int indentLevel = 0; | 9 int indentLevel = 0; |
10 bool inForInit = false; | 10 bool inForInit = false; |
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66 | 66 |
67 visit(Node node) { | 67 visit(Node node) { |
68 if (node.sourcePosition != null) outBuffer.beginMappedRange(); | 68 if (node.sourcePosition != null) outBuffer.beginMappedRange(); |
69 recordSourcePosition(node.sourcePosition); | 69 recordSourcePosition(node.sourcePosition); |
70 node.accept(this); | 70 node.accept(this); |
71 recordSourcePosition(node.endSourcePosition); | 71 recordSourcePosition(node.endSourcePosition); |
72 if (node.sourcePosition != null) outBuffer.endMappedRange(); | 72 if (node.sourcePosition != null) outBuffer.endMappedRange(); |
73 } | 73 } |
74 | 74 |
75 visitCommaSeparated(List<Node> nodes, int hasRequiredType, | 75 visitCommaSeparated(List<Node> nodes, int hasRequiredType, |
76 [bool newInForInit, bool newAtStatementBegin]) { | 76 {bool newInForInit, bool newAtStatementBegin}) { |
77 for (int i = 0; i < nodes.length; i++) { | 77 for (int i = 0; i < nodes.length; i++) { |
78 if (i != 0) { | 78 if (i != 0) { |
79 atStatementBegin = false; | 79 atStatementBegin = false; |
80 out(","); | 80 out(","); |
81 spaceOut(); | 81 spaceOut(); |
82 } | 82 } |
83 visitNestedExpression(nodes[i], hasRequiredType, | 83 visitNestedExpression(nodes[i], hasRequiredType, |
84 newInForInit, newAtStatementBegin); | 84 newInForInit: newInForInit, |
| 85 newAtStatementBegin: newAtStatementBegin); |
85 } | 86 } |
86 } | 87 } |
87 | 88 |
88 visitAll(List<Node> nodes) { | 89 visitAll(List<Node> nodes) { |
89 nodes.forEach(visit); | 90 nodes.forEach(visit); |
90 } | 91 } |
91 | 92 |
92 visitProgram(Program program) { | 93 visitProgram(Program program) { |
93 visitAll(program.body); | 94 visitAll(program.body); |
94 } | 95 } |
95 | 96 |
96 bool blockBody(Node body, [bool needsSeparation, bool needsNewline]) { | 97 bool blockBody(Node body, {bool needsSeparation, bool needsNewline}) { |
97 if (body is Block) { | 98 if (body is Block) { |
98 spaceOut(); | 99 spaceOut(); |
99 blockOut(body, false, needsNewline); | 100 blockOut(body, false, needsNewline); |
100 return true; | 101 return true; |
101 } | 102 } |
102 if (shouldCompressOutput && needsSeparation) { | 103 if (shouldCompressOutput && needsSeparation) { |
103 // If [shouldCompressOutput] is false, then the 'lineOut' will insert | 104 // If [shouldCompressOutput] is false, then the 'lineOut' will insert |
104 // the separation. | 105 // the separation. |
105 out(" "); | 106 out(" "); |
106 } else { | 107 } else { |
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372 | 373 |
373 visitFunctionDeclaration(FunctionDeclaration declaration) { | 374 visitFunctionDeclaration(FunctionDeclaration declaration) { |
374 VarCollector vars = new VarCollector(); | 375 VarCollector vars = new VarCollector(); |
375 vars.visitFunctionDeclaration(declaration); | 376 vars.visitFunctionDeclaration(declaration); |
376 indent(); | 377 indent(); |
377 functionOut(declaration.function, declaration.name, vars); | 378 functionOut(declaration.function, declaration.name, vars); |
378 lineOut(); | 379 lineOut(); |
379 } | 380 } |
380 | 381 |
381 visitNestedExpression(Expression node, int requiredPrecedence, | 382 visitNestedExpression(Expression node, int requiredPrecedence, |
382 [bool newInForInit, bool newAtStatementBegin]) { | 383 {bool newInForInit, bool newAtStatementBegin}) { |
383 bool needsParentheses = | 384 bool needsParentheses = |
384 // a - (b + c). | 385 // a - (b + c). |
385 (requiredPrecedence != EXPRESSION && | 386 (requiredPrecedence != EXPRESSION && |
386 node.precedenceLevel < requiredPrecedence) || | 387 node.precedenceLevel < requiredPrecedence) || |
387 // for (a = (x in o); ... ; ... ) { ... } | 388 // for (a = (x in o); ... ; ... ) { ... } |
388 (newInForInit && node is Binary && (node as Binary).op == "in") || | 389 (newInForInit && node is Binary && (node as Binary).op == "in") || |
389 // (function() { ... })(). | 390 // (function() { ... })(). |
390 // ({a: 2, b: 3}.toString()). | 391 // ({a: 2, b: 3}.toString()). |
391 (newAtStatementBegin && (node is NamedFunction || | 392 (newAtStatementBegin && (node is NamedFunction || |
392 node is Fun || | 393 node is Fun || |
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974 } | 975 } |
975 codes.add(charCodes.$0 + digit); | 976 codes.add(charCodes.$0 + digit); |
976 newName = new String.fromCharCodes(codes); | 977 newName = new String.fromCharCodes(codes); |
977 } | 978 } |
978 assert(const RegExp(r'[a-zA-Z][a-zA-Z0-9]*').hasMatch(newName)); | 979 assert(const RegExp(r'[a-zA-Z][a-zA-Z0-9]*').hasMatch(newName)); |
979 nameNumber++; | 980 nameNumber++; |
980 maps.last()[oldName] = newName; | 981 maps.last()[oldName] = newName; |
981 return newName; | 982 return newName; |
982 } | 983 } |
983 } | 984 } |
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