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| 1 | +/** |
| 2 | + * Cloud9 Language Foundation |
| 3 | + * |
| 4 | + * @copyright 2011, Ajax.org B.V. |
| 5 | + * @license GPLv3 <http://www.gnu.org/licenses/gpl.txt> |
| 6 | + */ |
| 7 | + |
| 8 | +// contains language specific debugger bindings |
| 9 | +define(function(require, exports, module) { |
| 10 | + |
| 11 | + var baseLanguageHandler = require('ext/language/base_handler'); |
| 12 | + |
| 13 | + var expressionBuilder = module.exports = Object.create(baseLanguageHandler); |
| 14 | + |
| 15 | + /*** publics ***/ |
| 16 | + |
| 17 | + expressionBuilder.handlesLanguage = function(language) { |
| 18 | + return language === 'javascript'; |
| 19 | + }; |
| 20 | + |
| 21 | + // builds an expression for the v8 debugger based on a node |
| 22 | + expressionBuilder.buildExpression = function(node) { |
| 23 | + if (!node) return null; |
| 24 | + |
| 25 | + return getExpressionValue(node); |
| 26 | + }; |
| 27 | + |
| 28 | + /*** privates ***/ |
| 29 | + |
| 30 | + // get a string value of any expression |
| 31 | + var getExpressionValue = function(d) { |
| 32 | + if (d.value) return d.value; |
| 33 | + |
| 34 | + var result; |
| 35 | + |
| 36 | + d.rewrite( |
| 37 | + // var someVar = ... |
| 38 | + 'VarDeclInit(x, _)', function(b) { |
| 39 | + result = b.x.value; |
| 40 | + }, |
| 41 | + // var someVar; |
| 42 | + 'VarDecl(x)', function(b) { |
| 43 | + result = b.x.value; |
| 44 | + }, |
| 45 | + // e.x |
| 46 | + 'PropAccess(e, x)', function(b) { |
| 47 | + result = getExpressionValue(b.e) + "." + b.x.value; |
| 48 | + }, |
| 49 | + // x |
| 50 | + 'Var(x)', function(b) { |
| 51 | + result = b.x.value; |
| 52 | + }, |
| 53 | + // e(arg, ...) |
| 54 | + 'Call(e, args)', function(b) { |
| 55 | + var method = getExpressionValue(b.e); |
| 56 | + var args = b.args.toArray().map(getExpressionValue).join(", "); |
| 57 | + result = method + "(" + args + ")"; |
| 58 | + }, |
| 59 | + // 10 |
| 60 | + 'Num(n)', function(b) { |
| 61 | + result = b.n.value; |
| 62 | + }, |
| 63 | + // e[idx] |
| 64 | + 'Index(e, idx)', function(b) { |
| 65 | + result = getExpressionValue(b.e) + "[" + getExpressionValue(b.idx) + "]"; |
| 66 | + }, |
| 67 | + // new SomeThing(arg, ...) |
| 68 | + 'New(e, args)', function(b) { |
| 69 | + var method = getExpressionValue(b.e); |
| 70 | + var args = b.args.toArray().map(getExpressionValue).join(", "); |
| 71 | + result = "new " + method + "(" + args + ")"; |
| 72 | + }, |
| 73 | + // x (function argument) |
| 74 | + 'FArg(x)', function(b) { |
| 75 | + result = b.x.value; |
| 76 | + }, |
| 77 | + // 10 + 4 |
| 78 | + 'Op(op, e1, e2)', function(b) { |
| 79 | + result = getExpressionValue(b.e1) + " " + b.op.value + " " + getExpressionValue(b.e2); |
| 80 | + }, |
| 81 | + // if nuthin' else matches |
| 82 | + function() { |
| 83 | + if(!result) |
| 84 | + result = ""; |
| 85 | + } |
| 86 | + ); |
| 87 | + return result; |
| 88 | + }; |
| 89 | + |
| 90 | +}); |
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