Add Kaitai Struct mime-type

data/freedesktop.org.xml.in

@@ -1903,6 +1903,10 @@ command to generate the output files.
     </magic>
     <glob pattern="*.ui"/>
   </mime-type>
+  <mime-type type="text/x-kaitai-struct">
+    <comment>Kaitai Struct definition file</comment>
+    <glob pattern="*.ksy"/>
+  </mime-type>
   <mime-type type="text/x-qml">
     <comment>Qt Markup Language file</comment>
     <magic priority="80">

tests/mime-detection/ico.ksy

+meta:
+  id: ico
+  title: Microsoft Windows icon file
+  file-extension: ico
+  endian: le
+  license: CC0-1.0
+doc: |
+  Microsoft Windows uses specific file format to store applications
+  icons - ICO. This is a container that contains one or more image
+  files (effectively, DIB parts of BMP files or full PNG files are
+  contained inside).
+doc-ref: https://msdn.microsoft.com/en-us/library/ms997538.aspx
+seq:
+  - id: magic
+    contents: [0, 0, 1, 0]
+  - id: num_images
+    -orig-id: idCount
+    type: u2
+    doc: Number of images contained in this file
+  - id: images
+    -orig-id: idEntries
+    type: icon_dir_entry
+    repeat: expr
+    repeat-expr: num_images
+types:
+  icon_dir_entry:
+    -orig-id: ICONDIRENTRY
+    seq:
+      - id: width
+        -orig-id: bWidth
+        type: u1
+        doc: Width of image, px
+      - id: height
+        -orig-id: bHeight
+        type: u1
+        doc: Height of image, px
+      - id: num_colors
+        -orig-id: bColorCount
+        type: u1
+        doc: |
+          Number of colors in palette of the image or 0 if image has
+          no palette (i.e. RGB, RGBA, etc)
+      - id: reserved
+        -orig-id: bReserved
+        contents: [0]
+      - id: num_planes
+        -orig-id: wPlanes
+        type: u2
+        doc: Number of color planes
+      - id: bpp
+        -orig-id: wBitCount
+        type: u2
+        doc: Bits per pixel in the image
+      - id: len_img
+        -orig-id: dwBytesInRes
+        type: u4
+        doc: Size of the image data
+      - id: ofs_img
+        -orig-id: dwImageOffset
+        type: u4
+        doc: Absolute offset of the image data start in the file
+    instances:
+      img:
+        pos: ofs_img
+        size: len_img
+        doc: |
+          Raw image data. Use `is_png` to determine whether this is an
+          embedded PNG file (true) or a DIB bitmap (false) and call a
+          relevant parser, if needed to parse image data further.
+      png_header:
+        pos: ofs_img
+        size: 8
+        doc: |
+          Pre-reads first 8 bytes of the image to determine if it's an
+          embedded PNG file.
+      is_png:
+        value: png_header == [137, 80, 78, 71, 13, 10, 26, 10]
+        doc: True if this image is in PNG format.

tests/mime-detection/list

@@ -262,6 +262,7 @@ helloworld.java text/x-java ox
 helloworld.groovy text/x-groovy ox
 helloworld.vbs text/vbscript ox
 build.gradle text/x-gradle ox
+ico.ksy text/x-kaitai-struct ox
 # Copied from http://asurvey.net/ccsfagent/media/survey.js
 survey.js application/javascript ox
 # Copied from gecko/accessible/src/jsat/Utils.jsm in Boot2Gecko