Merge pull request #905 from notmasteryet/issue-886b

Fixing missing text (#886)

src/fonts.js

@@ -884,6 +884,13 @@ var Font = (function Font() {
            String.fromCharCode(value & 0xff);
   };
 
+  function safeString16(value) {
+    // clamp value to the 16-bit int range
+    value = value > 0x7FFF ? 0x7FFF : value < -0x8000 ? -0x8000 : value;
+    return String.fromCharCode((value >> 8) & 0xff) +
+           String.fromCharCode(value & 0xff);
+  };
+
   function string32(value) {
     return String.fromCharCode((value >> 24) & 0xff) +
            String.fromCharCode((value >> 16) & 0xff) +
@@ -1903,9 +1910,9 @@ var Font = (function Font() {
               '\x00\x00\x00\x00\x9e\x0b\x7e\x27' + // creation date
               '\x00\x00\x00\x00\x9e\x0b\x7e\x27' + // modifification date
               '\x00\x00' + // xMin
-              string16(properties.descent) + // yMin
+              safeString16(properties.descent) + // yMin
               '\x0F\xFF' + // xMax
-              string16(properties.ascent) + // yMax
+              safeString16(properties.ascent) + // yMax
               string16(properties.italicAngle ? 2 : 0) + // macStyle
               '\x00\x11' + // lowestRecPPEM
               '\x00\x00' + // fontDirectionHint
@@ -1917,15 +1924,15 @@ var Font = (function Font() {
         'hhea': (function fontFieldsHhea() {
           return stringToArray(
               '\x00\x01\x00\x00' + // Version number
-              string16(properties.ascent) + // Typographic Ascent
-              string16(properties.descent) + // Typographic Descent
+              safeString16(properties.ascent) + // Typographic Ascent
+              safeString16(properties.descent) + // Typographic Descent
               '\x00\x00' + // Line Gap
               '\xFF\xFF' + // advanceWidthMax
               '\x00\x00' + // minLeftSidebearing
               '\x00\x00' + // minRightSidebearing
               '\x00\x00' + // xMaxExtent
-              string16(properties.capHeight) + // caretSlopeRise
-              string16(Math.tan(properties.italicAngle) *
+              safeString16(properties.capHeight) + // caretSlopeRise
+              safeString16(Math.tan(properties.italicAngle) *
                        properties.xHeight) + // caretSlopeRun
               '\x00\x00' + // caretOffset
               '\x00\x00' + // -reserved-

test/pdfs/geothermal.pdf.link

@@ -0,0 +1 @@
+http://geothermal.inel.gov/publications/future_of_geothermal_energy.pdf

test/test_manifest.json

@@ -302,5 +302,14 @@
        "link": true,
        "rounds": 1,
        "type": "eq"
+    },
+    {  "id": "geothermal.pdf",
+       "file": "pdfs/geothermal.pdf",
+       "md5": "ecffc0ce38ffdf1e90dc952f186e9a91",
+       "rounds": 1,
+       "link": true,
+       "pageLimit": 5,
+       "skipPages": [1],
+       "type": "eq"
     }
 ]