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app_vue/node_modules/wcwidth/index.js

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+"use strict"
+
+var defaults = require('defaults')
+var combining = require('./combining')
+
+var DEFAULTS = {
+  nul: 0,
+  control: 0
+}
+
+module.exports = function wcwidth(str) {
+  return wcswidth(str, DEFAULTS)
+}
+
+module.exports.config = function(opts) {
+  opts = defaults(opts || {}, DEFAULTS)
+  return function wcwidth(str) {
+    return wcswidth(str, opts)
+  }
+}
+
+/*
+ *  The following functions define the column width of an ISO 10646
+ *  character as follows:
+ *  - The null character (U+0000) has a column width of 0.
+ *  - Other C0/C1 control characters and DEL will lead to a return value
+ *    of -1.
+ *  - Non-spacing and enclosing combining characters (general category
+ *    code Mn or Me in the
+ *    Unicode database) have a column width of 0.
+ *  - SOFT HYPHEN (U+00AD) has a column width of 1.
+ *  - Other format characters (general category code Cf in the Unicode
+ *    database) and ZERO WIDTH
+ *    SPACE (U+200B) have a column width of 0.
+ *  - Hangul Jamo medial vowels and final consonants (U+1160-U+11FF)
+ *    have a column width of 0.
+ *  - Spacing characters in the East Asian Wide (W) or East Asian
+ *    Full-width (F) category as
+ *    defined in Unicode Technical Report #11 have a column width of 2.
+ *  - All remaining characters (including all printable ISO 8859-1 and
+ *    WGL4 characters, Unicode control characters, etc.) have a column
+ *    width of 1.
+ *  This implementation assumes that characters are encoded in ISO 10646.
+*/
+
+function wcswidth(str, opts) {
+  if (typeof str !== 'string') return wcwidth(str, opts)
+
+  var s = 0
+  for (var i = 0; i < str.length; i++) {
+    var n = wcwidth(str.charCodeAt(i), opts)
+    if (n < 0) return -1
+    s += n
+  }
+
+  return s
+}
+
+function wcwidth(ucs, opts) {
+  // test for 8-bit control characters
+  if (ucs === 0) return opts.nul
+  if (ucs < 32 || (ucs >= 0x7f && ucs < 0xa0)) return opts.control
+
+  // binary search in table of non-spacing characters
+  if (bisearch(ucs)) return 0
+
+  // if we arrive here, ucs is not a combining or C0/C1 control character
+  return 1 +
+      (ucs >= 0x1100 &&
+       (ucs <= 0x115f ||                       // Hangul Jamo init. consonants
+        ucs == 0x2329 || ucs == 0x232a ||
+        (ucs >= 0x2e80 && ucs <= 0xa4cf &&
+         ucs != 0x303f) ||                     // CJK ... Yi
+        (ucs >= 0xac00 && ucs <= 0xd7a3) ||    // Hangul Syllables
+        (ucs >= 0xf900 && ucs <= 0xfaff) ||    // CJK Compatibility Ideographs
+        (ucs >= 0xfe10 && ucs <= 0xfe19) ||    // Vertical forms
+        (ucs >= 0xfe30 && ucs <= 0xfe6f) ||    // CJK Compatibility Forms
+        (ucs >= 0xff00 && ucs <= 0xff60) ||    // Fullwidth Forms
+        (ucs >= 0xffe0 && ucs <= 0xffe6) ||
+        (ucs >= 0x20000 && ucs <= 0x2fffd) ||
+        (ucs >= 0x30000 && ucs <= 0x3fffd)));
+}
+
+function bisearch(ucs) {
+  var min = 0
+  var max = combining.length - 1
+  var mid
+
+  if (ucs < combining[0][0] || ucs > combining[max][1]) return false
+
+  while (max >= min) {
+    mid = Math.floor((min + max) / 2)
+    if (ucs > combining[mid][1]) min = mid + 1
+    else if (ucs < combining[mid][0]) max = mid - 1
+    else return true
+  }
+
+  return false
+}