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template_binding/lib/src/mustache_tokens.dart

Index: template_binding/lib/src/mustache_tokens.dart
diff --git a/template_binding/lib/src/mustache_tokens.dart b/template_binding/lib/src/mustache_tokens.dart
deleted file mode 100644
index c05dac1b83688f747bd41cfa8c9f9fb9dcaf21b2..0000000000000000000000000000000000000000
--- a/template_binding/lib/src/mustache_tokens.dart
+++ /dev/null
@@ -1,153 +0,0 @@
-// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-library template_binding.src.mustache_tokens;
-
-import 'package:observe/observe.dart';
-
-// Dart note: this was added to decouple the parse function below from the rest
-// of template_binding. This allows using this code in command-line tools as
-// well.
-typedef Function DelegateFunctionFactory(String pathString);
-
-/**
- * Represents a set of parsed tokens from a {{ mustache binding expression }}.
- * This can be created by calling [parse].
- *
- * For performance reasons the data is stored in one linear array in [_tokens].
- * This class wraps that array and provides accessors in an attempt to make the
- * pattern easier to understand. See [length] and [getText] for example.
- */
-class MustacheTokens {
-  // Constants for indexing into the exploded structs in [_tokens] .
-  static const _TOKEN_TEXT = 0;
-  static const _TOKEN_ONETIME = 1;
-  static const _TOKEN_PATH = 2;
-  static const _TOKEN_PREPAREFN = 3;
-  static const _TOKEN_SIZE = 4;
-
-  // There is 1 extra entry for the end text.
-  static const _TOKEN_ENDTEXT = 1;
-
-  bool get hasOnePath => _tokens.length == _TOKEN_SIZE + _TOKEN_ENDTEXT;
-  bool get isSimplePath => hasOnePath &&
-      _tokens[_TOKEN_TEXT] == '' && _tokens[_TOKEN_SIZE + _TOKEN_TEXT] == '';
-
-  /**
-   * [TEXT, (ONE_TIME?, PATH, DELEGATE_FN, TEXT)+] if there is at least one
-   * mustache.
-   */
-  final List _tokens;
-
-  final bool onlyOneTime;
-
-  // Dart note: I think this is cached in JavaScript to avoid an extra
-  // allocation per template instance. Seems reasonable, so we do the same.
-  Function _combinator;
-  Function get combinator => _combinator;
-
-  MustacheTokens._(this._tokens, this.onlyOneTime) {
-    // Should be: [TEXT, (ONE_TIME?, PATH, DELEGATE_FN, TEXT)+].
-    assert((_tokens.length - _TOKEN_ENDTEXT) % _TOKEN_SIZE == 0);
-
-    _combinator = hasOnePath ? _singleCombinator : _listCombinator;
-  }
-
-  int get length => _tokens.length ~/ _TOKEN_SIZE;
-
-  /**
-   * Gets the [i]th text entry. Note that [length] can be passed to get the
-   * final text entry.
-   */
-  String getText(int i) => _tokens[i * _TOKEN_SIZE + _TOKEN_TEXT];
-
-  /** Gets the oneTime flag for the [i]th token. */
-  bool getOneTime(int i) => _tokens[i * _TOKEN_SIZE + _TOKEN_ONETIME];
-
-  /** Gets the path for the [i]th token. */
-  PropertyPath getPath(int i) => _tokens[i * _TOKEN_SIZE + _TOKEN_PATH];
-
-  /** Gets the prepareBinding function for the [i]th token. */
-  Function getPrepareBinding(int i) =>
-      _tokens[i * _TOKEN_SIZE + _TOKEN_PREPAREFN];
-
-
-  /**
-   * Parses {{ mustache }} bindings.
-   *
-   * Returns null if there are no matches. Otherwise returns the parsed tokens.
-   */
-  static MustacheTokens parse(String s, [DelegateFunctionFactory fnFactory]) {
-    if (s == null || s.isEmpty) return null;
-
-    var tokens = null;
-    var length = s.length;
-    var lastIndex = 0;
-    var onlyOneTime = true;
-    while (lastIndex < length) {
-      var startIndex = s.indexOf('{{', lastIndex);
-      var oneTimeStart = s.indexOf('[[', lastIndex);
-      var oneTime = false;
-      var terminator = '}}';
-
-      if (oneTimeStart >= 0 &&
-          (startIndex < 0 || oneTimeStart < startIndex)) {
-        startIndex = oneTimeStart;
-        oneTime = true;
-        terminator = ']]';
-      }
-
-      var endIndex = -1;
-      if (startIndex >= 0) {
-        endIndex = s.indexOf(terminator, startIndex + 2);
-      }
-
-      if (endIndex < 0) {
-        if (tokens == null) return null;
-
-        tokens.add(s.substring(lastIndex)); // TEXT
-        break;
-      }
-
-      if (tokens == null) tokens = [];
-      tokens.add(s.substring(lastIndex, startIndex)); // TEXT
-      var pathString = s.substring(startIndex + 2, endIndex).trim();
-      tokens.add(oneTime); // ONETIME?
-      onlyOneTime = onlyOneTime && oneTime;
-      var delegateFn = fnFactory == null ? null : fnFactory(pathString);
-      // Don't try to parse the expression if there's a prepareBinding function
-      if (delegateFn == null) {
-        tokens.add(new PropertyPath(pathString)); // PATH
-      } else {
-        tokens.add(null);
-      }
-      tokens.add(delegateFn); // DELEGATE_FN
-
-      lastIndex = endIndex + 2;
-    }
-
-    if (lastIndex == length) tokens.add(''); // TEXT
-
-    return new MustacheTokens._(tokens, onlyOneTime);
-  }
-
-
-  // Dart note: split "combinator" into the single/list variants, so the
-  // argument can be typed.
-  String _singleCombinator(Object value) {
-    if (value == null) value = '';
-    return '${getText(0)}$value${getText(length)}';
-  }
-
-  String _listCombinator(List<Object> values) {
-    var newValue = new StringBuffer(getText(0));
-    int len = this.length;
-    for (var i = 0; i < len; i++) {
-      var value = values[i];
-      if (value != null) newValue.write(value);
-      newValue.write(getText(i + 1));
-    }
-    return newValue.toString();
-  }
-}