1 files changed, 72 insertions, 0 deletions
diff --git a/plugins/language_diff.lua b/plugins/language_diff.lua
new file mode 100644
index 0000000..46a6af4
--- /dev/null
+++ b/plugins/language_diff.lua
@@ -0,0 +1,72 @@
+-- mod-version:2 -- lite-xl 2.0
+local syntax = require "core.syntax"
+local style = require "core.style"
+local common = require "core.common"
+
+-- we need these symbol types to have uniform colors
+style.syntax["diff_add"] = { common.color "#72b886" }
+style.syntax["diff_del"] = { common.color "#F36161" }
+
+syntax.add {
+  name = "Diff",
+  files = { "%.diff$", "%.patch$", "%.rej$" },
+  headers = "^diff ",
+  patterns = {
+    -- Method the patch was generated with and source/target files
+    { regex = "^diff .+\n$",       type = "function" },
+    -- Seen for changing the file permissions
+    { regex = "^new .+\n$",        type = "comment"  },
+    -- Usually holds starting and ending commit
+    { regex = "^index .+\n$",      type = "comment"  },
+    -- Position to patch
+    {
+      pattern = "@@.-@@ ().+\n",            --with heading
+      type = { "number", "string" }
+    },
+    {
+      regex = "^@@ [\\d,\\-\\+ ]+ @@\n$",   --wihtout heading
+      type = "number"
+    },
+    -- Other position to patch formats
+    {
+      regex = "^\\-{3} [\\d]+,[\\d]+ \\-{4}\n$",
+      type = "number"
+    },
+    {
+      regex = "^\\*{3} [\\d]+,[\\d]+ \\*{4}\n$",
+      type = "number"
+    },
+    -- Source and target file
+    { regex = "^-{3} .+\n$",                 type = "keyword"  },
+    { regex = "^\\+{3} .+\n$",               type = "keyword"  },
+    -- Rarely used source file indicator
+    { regex = "^\\*{3} .+\n$",               type = "keyword"  },
+    -- git patches seem to add 3 dashes to separate message from changed files
+    { regex = "^\\-{3}\n$",                  type = "normal"   },
+    -- Addition and deletion of lines
+    { regex = "^\\-.*\n$",                   type = "diff_del" },
+    { regex = "^\\+.*\n$",                   type = "diff_add" },
+    { regex = "^<.*\n$",                     type = "diff_del" },
+    { regex = "^>.*\n$",                     type = "diff_add" },
+    -- Change between two lines
+    { regex = "^!.*\n$",                     type = "number"   },
+    -- Stuff usually found on a authored patch heading
+    {
+      pattern = "From ()[a-fA-F0-9]+ ().+\n",
+      type = { "keyword", "number", "string" }
+    },
+    { regex = "^[a-zA-Z\\-]+: ",             type = "keyword" },
+    -- Diff stats
+    { regex = "^ [\\d]+ files? changed",     type = "function" },
+    { regex = "[\\d]+ insertions?\\(\\+\\)", type = "diff_add" },
+    { regex = "[\\d]+ deletions?\\(\\-\\)",  type = "diff_del" },
+    -- Match e-mail
+    {
+      regex = "<[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\\.[a-zA-Z0-9-.]+>\n",
+      type = "keyword2"
+    },
+    -- Everything else is normal text
+    { pattern = "[%a_][%w_]*",               type = "normal"   },
+  },
+  symbols = {}
+}