stmd.js: Fixed entityToChar, adding fromCodePoint polyfill.

Closes #151.

2 files changed, 94 insertions, 4 deletions

diff --git a/LICENSE b/LICENSE
index bb8c36f..988c4b4 100644
--- a/LICENSE
+++ b/LICENSE
@@ -28,3 +28,28 @@ DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+-----
+
+The polyfill for String.fromCodePoint included in stmd.js is
+Copyright Mathias Bynens <http://mathiasbynens.be/>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
diff --git a/js/stmd.js b/js/stmd.js
index bc6b2d1..dd7876a 100755
--- a/js/stmd.js
+++ b/js/stmd.js
@@ -2223,6 +2223,71 @@
     var reMain = /^(?:[_*`\n]+|[\[\]\\!<&*_]|(?: *[^\n `\[\]\\!<&*_]+)+|[ \n]+)/m;
 
     // UTILITY FUNCTIONS
+    // polyfill for fromCodePoint:
+    // https://github.com/mathiasbynens/String.fromCodePoint
+    /*! http://mths.be/fromcodepoint v0.2.1 by @mathias */
+    if (!String.fromCodePoint) {
+        (function() {
+            var defineProperty = (function() {
+                // IE 8 only supports `Object.defineProperty` on DOM elements
+                try {
+                    var object = {};
+                    var $defineProperty = Object.defineProperty;
+                    var result = $defineProperty(object, object, object) && $defineProperty;
+                } catch(error) {}
+                return result;
+            }());
+            var stringFromCharCode = String.fromCharCode;
+            var floor = Math.floor;
+            var fromCodePoint = function(_) {
+                var MAX_SIZE = 0x4000;
+                var codeUnits = [];
+                var highSurrogate;
+                var lowSurrogate;
+                var index = -1;
+                var length = arguments.length;
+                if (!length) {
+                    return '';
+                }
+                var result = '';
+                while (++index < length) {
+                    var codePoint = Number(arguments[index]);
+                    if (
+                        !isFinite(codePoint) || // `NaN`, `+Infinity`, or `-Infinity`
+                            codePoint < 0 || // not a valid Unicode code point
+                            codePoint > 0x10FFFF || // not a valid Unicode code point
+                            floor(codePoint) != codePoint // not an integer
+                    ) {
+                        return String.fromCharCode(0xFFFD);
+                    }
+                    if (codePoint <= 0xFFFF) { // BMP code point
+                        codeUnits.push(codePoint);
+                    } else { // Astral code point; split in surrogate halves
+                        // http://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
+                        codePoint -= 0x10000;
+                        highSurrogate = (codePoint >> 10) + 0xD800;
+                        lowSurrogate = (codePoint % 0x400) + 0xDC00;
+                        codeUnits.push(highSurrogate, lowSurrogate);
+                    }
+                    if (index + 1 == length || codeUnits.length > MAX_SIZE) {
+                        result += stringFromCharCode.apply(null, codeUnits);
+                        codeUnits.length = 0;
+                    }
+                }
+                return result;
+            };
+            if (defineProperty) {
+                defineProperty(String, 'fromCodePoint', {
+                    'value': fromCodePoint,
+                    'configurable': true,
+                    'writable': true
+                });
+            } else {
+                String.fromCodePoint = fromCodePoint;
+            }
+        }());
+    }
+
     var entityToChar = function(m) {
         var isNumeric = /^&#/.test(m);
         var isHex = /^&#[Xx]/.test(m);
@@ -2234,7 +2299,7 @@
             } else {
                 num = parseInt(m.slice(2,-1), 10);
             }
-            uchar = String.fromCharCode(num);
+            uchar = String.fromCodePoint(num);
         } else {
             uchar = entities[m.slice(1,-1)];
         }
@@ -2428,7 +2493,7 @@
         if (cc_after === -1) {
             char_after = '\n';
         } else {
-            char_after = String.fromCharCode(cc_after);
+            char_after = String.fromCodePoint(cc_after);
         }
 
         var can_open = numdelims > 0 && numdelims <= 3 && !(/\s/.test(char_after));
@@ -2460,7 +2525,7 @@
         var startpos = this.pos;
         var c ;
         var first_close = 0;
-        c = String.fromCharCode(cc);
+        c = String.fromCodePoint(cc);
 
         var numdelims;
         var numclosedelims;
@@ -2876,7 +2941,7 @@
         }
         if (!res) {
             this.pos += 1;
-            inlines.push({t: 'Str', c: String.fromCharCode(c)});
+            inlines.push({t: 'Str', c: String.fromCodePoint(c)});
         }
 
         if (memoize) {