flow like the river

VISUALIZACION/node_modules/grapheme-breaker/src/GraphemeBreaker.js

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+// Generated by CoffeeScript 1.8.0
+(function() {
+  var CR, Control, Extend, L, LF, LV, LVT, Regional_Indicator, SpacingMark, T, UnicodeTrie, V, classTrie, codePointAt, fs, shouldBreak, _ref;
+
+  _ref = require('./classes.json'), CR = _ref.CR, LF = _ref.LF, Control = _ref.Control, Extend = _ref.Extend, Regional_Indicator = _ref.Regional_Indicator, SpacingMark = _ref.SpacingMark, L = _ref.L, V = _ref.V, T = _ref.T, LV = _ref.LV, LVT = _ref.LVT;
+
+  UnicodeTrie = require('unicode-trie');
+
+  fs = require('fs');
+
+  classTrie = new UnicodeTrie(fs.readFileSync(__dirname + '/classes.trie'));
+
+  codePointAt = function(str, idx) {
+    var code, hi, low;
+    idx = idx || 0;
+    code = str.charCodeAt(idx);
+    if ((0xD800 <= code && code <= 0xDBFF)) {
+      hi = code;
+      low = str.charCodeAt(idx + 1);
+      if ((0xDC00 <= low && low <= 0xDFFF)) {
+        return ((hi - 0xD800) * 0x400) + (low - 0xDC00) + 0x10000;
+      }
+      return hi;
+    }
+    if ((0xDC00 <= code && code <= 0xDFFF)) {
+      hi = str.charCodeAt(idx - 1);
+      low = code;
+      if ((0xD800 <= hi && hi <= 0xDBFF)) {
+        return ((hi - 0xD800) * 0x400) + (low - 0xDC00) + 0x10000;
+      }
+      return low;
+    }
+    return code;
+  };
+
+  shouldBreak = function(previous, current) {
+    if (previous === CR && current === LF) {
+      return false;
+    } else if (previous === Control || previous === CR || previous === LF) {
+      return true;
+    } else if (current === Control || current === CR || current === LF) {
+      return true;
+    } else if (previous === L && (current === L || current === V || current === LV || current === LVT)) {
+      return false;
+    } else if ((previous === LV || previous === V) && (current === V || current === T)) {
+      return false;
+    } else if ((previous === LVT || previous === T) && current === T) {
+      return false;
+    } else if (previous === Regional_Indicator && current === Regional_Indicator) {
+      return false;
+    } else if (current === Extend) {
+      return false;
+    } else if (current === SpacingMark) {
+      return false;
+    }
+    return true;
+  };
+
+  exports.nextBreak = function(string, index) {
+    var i, next, prev, _i, _ref1, _ref2, _ref3, _ref4;
+    if (index == null) {
+      index = 0;
+    }
+    if (index < 0) {
+      return 0;
+    }
+    if (index >= string.length - 1) {
+      return string.length;
+    }
+    prev = classTrie.get(codePointAt(string, index));
+    for (i = _i = _ref1 = index + 1, _ref2 = string.length; _i < _ref2; i = _i += 1) {
+      if ((0xd800 <= (_ref3 = string.charCodeAt(i - 1)) && _ref3 <= 0xdbff) && (0xdc00 <= (_ref4 = string.charCodeAt(i)) && _ref4 <= 0xdfff)) {
+        continue;
+      }
+      next = classTrie.get(codePointAt(string, i));
+      if (shouldBreak(prev, next)) {
+        return i;
+      }
+      prev = next;
+    }
+    return string.length;
+  };
+
+  exports.previousBreak = function(string, index) {
+    var i, next, prev, _i, _ref1, _ref2, _ref3;
+    if (index == null) {
+      index = string.length;
+    }
+    if (index > string.length) {
+      return string.length;
+    }
+    if (index <= 1) {
+      return 0;
+    }
+    index--;
+    next = classTrie.get(codePointAt(string, index));
+    for (i = _i = _ref1 = index - 1; _i >= 0; i = _i += -1) {
+      if ((0xd800 <= (_ref2 = string.charCodeAt(i)) && _ref2 <= 0xdbff) && (0xdc00 <= (_ref3 = string.charCodeAt(i + 1)) && _ref3 <= 0xdfff)) {
+        continue;
+      }
+      prev = classTrie.get(codePointAt(string, i));
+      if (shouldBreak(prev, next)) {
+        return i + 1;
+      }
+      next = prev;
+    }
+    return 0;
+  };
+
+  exports["break"] = function(str) {
+    var brk, index, res;
+    res = [];
+    index = 0;
+    while ((brk = exports.nextBreak(str, index)) < str.length) {
+      res.push(str.slice(index, brk));
+      index = brk;
+    }
+    if (index < str.length) {
+      res.push(str.slice(index));
+    }
+    return res;
+  };
+
+  exports.countBreaks = function(str) {
+    var brk, count, index;
+    count = 0;
+    index = 0;
+    while ((brk = exports.nextBreak(str, index)) < str.length) {
+      index = brk;
+      count++;
+    }
+    if (index < str.length) {
+      count++;
+    }
+    return count;
+  };
+
+}).call(this);