| part of mustache; |
| |
| /// Passed as an argument to a mustache lambda function. |
| class _LambdaContext implements LambdaContext { |
| |
| final _Node _node; |
| final _Renderer _renderer; |
| final bool _isSection; |
| bool _closed = false; |
| |
| _LambdaContext(this._node, this._renderer, {bool isSection: true}) |
| : _isSection = isSection; |
| |
| void close() { |
| _closed = true; |
| } |
| |
| _checkClosed() { |
| if (_closed) throw new TemplateException( |
| 'LambdaContext accessed outside of callback.', |
| _renderer._templateName, _node.line, _node.column); |
| } |
| |
| /// Render the current section tag in the current context and return the |
| /// result as a string. |
| String renderString() { |
| _checkClosed(); |
| return _renderer._renderSubtree(_node); |
| } |
| |
| //FIXME Currently only return values are supported. |
| /// Render and directly output the current section tag. |
| // void render() { |
| // _checkClosed(); |
| // } |
| |
| //FIXME Currently only return values are supported. |
| /// Output a string. |
| // void write(Object object) { |
| // _checkClosed(); |
| // } |
| |
| /// Get the unevaluated template source for the current section tag. |
| String get source { |
| _checkClosed(); |
| |
| var nodes = _node.children; |
| |
| if (nodes.isEmpty) return ''; |
| |
| if (nodes.length == 1 && nodes.first.type == _TEXT) |
| return nodes.first.value; |
| |
| var source = _renderer._source.substring(_node.start, _node.end); |
| |
| return source; |
| } |
| |
| /// Evaluate the string as a mustache template using the current context. |
| String renderSource(String source) { |
| _checkClosed(); |
| var sink = new StringBuffer(); |
| // Lambdas used for sections should parse with the current delimiters. |
| var delimiters = _isSection ? _renderer._delimiters : '{{ }}'; |
| var node = _parse(source, |
| _renderer._lenient, |
| _renderer._templateName, |
| delimiters); |
| var renderer = new _Renderer.lambda( |
| _renderer, |
| node, |
| source, |
| _renderer._indent, |
| sink, |
| _renderer._delimiters); |
| renderer.render(); |
| return sink.toString(); |
| } |
| |
| /// Lookup the value of a variable in the current context. |
| Object lookup(String variableName) { |
| _checkClosed(); |
| return _renderer._resolveValue(variableName); |
| } |
| |
| } |