Add Adobe Font Metrics to recognised filetypes (#3731)

* Add Adobe Font Metrics to recognised filetypes

* Reduce filesizes of AFM samples

* Add a self-generated, unpruned AFM sample

grammars.yml

@@ -380,6 +380,7 @@ vendor/grammars/language-css:
 vendor/grammars/language-emacs-lisp:
 - source.emacs.lisp
 vendor/grammars/language-fontforge:
+- source.afm
 - source.fontforge
 - source.opentype
 - text.sfd

lib/linguist/languages.yml

@@ -171,6 +171,18 @@ Ada:
   - ada2005
   ace_mode: ada
   language_id: 11
+Adobe Font Metrics:
+  type: data
+  tm_scope: source.afm
+  extensions:
+  - ".afm"
+  aliases:
+  - acfm
+  - adobe composite font metrics
+  - adobe multiple font metrics
+  - amfm
+  ace_mode: text
+  language_id: 147198098
 Agda:
   type: programming
   color: "#315665"

samples/Adobe Font Metrics/OpenSansCondensed-Bold.afm

@@ -0,0 +1,69 @@
+StartFontMetrics 2.0
+Comment Generated by FontForge 20170719
+Comment Creation Date: Sun Jul 23 19:47:25 2017
+FontName OpenSansCondensed-Bold
+FullName Open Sans Condensed Bold
+FamilyName Open Sans Condensed
+Weight Bold
+Notice (Digitized data copyright (c) 2010-2011, Google Corporation.)
+ItalicAngle 0
+IsFixedPitch false
+UnderlinePosition -205
+UnderlineThickness 102
+Version 1.11
+EncodingScheme ISO10646-1
+FontBBox -667 -290 1046 1062
+CapHeight 714
+XHeight 544
+Ascender 760
+Descender -240
+StartCharMetrics 939
+C 32 ; WX 247 ; N space ; B 0 0 0 0 ;
+C 33 ; WX 270 ; N exclam ; B 54 -14 216 714 ;
+C 34 ; WX 445 ; N quotedbl ; B 59 456 388 714 ;
+C 35 ; WX 543 ; N numbersign ; B 20 0 525 714 ;
+C 36 ; WX 462 ; N dollar ; B 36 -59 427 760 ;
+C 37 ; WX 758 ; N percent ; B 30 -9 729 725 ;
+C 38 ; WX 581 ; N ampersand ; B 28 -10 572 725 ;
+C 39 ; WX 246 ; N quotesingle ; B 59 456 188 714 ;
+C -1 ; WX 462 ; N six.os ; B 36 -10 427 724 ;
+C -1 ; WX 420 ; N seven.os ; B 19 -170 402 544 ;
+C -1 ; WX 462 ; N eight.os ; B 35 -10 429 724 ;
+C -1 ; WX 461 ; N nine.os ; B 33 -182 424 564 ;
+C -1 ; WX 496 ; N g.alt ; B 36 -241 442 555 ;
+C -1 ; WX 496 ; N gcircumflex.alt ; B 36 -241 442 767 ;
+C -1 ; WX 496 ; N gbreve.alt ; B 36 -241 442 766 ;
+C -1 ; WX 496 ; N gdot.alt ; B 36 -241 442 756 ;
+C -1 ; WX 496 ; N gcommaaccent.alt ; B 36 -241 442 767 ;
+C -1 ; WX 0 ; N cyrotmarkcomb ; B -203 591 203 714 ;
+EndCharMetrics
+StartKernData
+StartKernPairs 15878
+KPX quotedbl uni1ECA 20
+KPX quotedbl uni1EC8 20
+KPX quotedbl Idotaccent 20
+KPX quotedbl Iogonek 20
+KPX quotedbl Imacron 20
+KPX quotedbl Idieresis 20
+KPX quotedbl Icircumflex 20
+KPX quotedbl Iacute 20
+KPX quotedbl Igrave 20
+KPX quotedbl I 20
+KPX quotedbl uni1EF9 20
+KPX quoteleft q -20
+KPX quoteleft o -20
+KPX quoteleft g -9
+KPX quoteleft e -20
+KPX quoteleft d -20
+KPX quoteleft c -20
+KPX quoteleft Z 20
+KPX Delta C -9
+KPX Delta A -20
+KPX Delta question 20
+KPX Delta period -41
+KPX Delta comma -41
+KPX Delta quotesingle 41
+KPX Delta quotedbl 41
+EndKernPairs
+EndKernData
+EndFontMetrics