Add syntax coloring for Gemini markup via `gawk` v1 PROPOSED

Peter Marinov: 1
 Add syntax coloring for Gemini markup via `gawk`

 1 files changed, 86 insertions(+), 0 deletions(-)

[PATCH] Add syntax coloring for Gemini markup via `gawk` Export this patch

* Works with GNU Awk
---
 contrib/gmi_color_gawk.awk | 86 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 contrib/gmi_color_gawk.awk

diff --git a/contrib/gmi_color_gawk.awk b/contrib/gmi_color_gawk.awk
new file mode 100644
index 0000000..787ed6b
--- /dev/null
+++ b/contrib/gmi_color_gawk.awk
@@ -0,0 +1,86 @@
+# gmi_color_gawk.awk
+#
+# Markup highlighting of Gemini pages for ANSI terminal
+#
+# IMPORTANT:
+# It uses GNU Awk syntax, it won't work with mawk for example
+
+func print_folded(long_line, prefix) {
+  # Split words into an array
+  split(long_line, list_of_words)
+
+  line_len = 0
+  for(i in list_of_words) {
+    # Check if we go beyond width of the block
+    if ((line_len + length(list_of_words[i])) > 78) {
+      line_len = 0
+      printf("\n")
+    }
+    # Print prefix
+    if (line_len == 0)
+      printf(prefix)
+    line_len += length(list_of_words[i]) + 1
+    printf("%s ", list_of_words[i])
+  }
+
+  # Handle case of empty lines
+  if (length(long_line) == 0)
+    printf(prefix)
+
+  # The line ends with a new-line
+  printf("\n")
+}
+
+BEGIN {
+  code_section = 0
+}
+
+# URL
+match($0, /^(=>) ([^ \t]+).(.*)/, arr) {
+  if (code_section == 0)
+  {
+    print "\033[0;36m" arr[1], arr[2] "\033[0;35m,\n\t\033[1m", arr[3] "\033[0m"
+    next
+  }
+}
+
+# Quote
+match($0, /^>(.*)/, arr) {
+  if (code_section == 0)
+  {
+    printf("\033[0;34m")
+    print_folded(arr[1], "> ")
+    printf("\033[0m")
+    next
+  }
+}
+
+# Code section
+/^```/ {
+  if (code_section == 0)
+      # Activate color for code section
+      print "\033[0;32m```"
+  else
+      # Remove color at the end of the code section
+      print "```\033[0m"
+  code_section = 1 - code_section
+  next
+}
+
+# Heading
+/^#.*/ {
+  if (code_section == 0)
+  {
+    print "\033[0m\033[1m" $0 "\033[0m"
+    next
+  }
+}
+
+# Everything else -- the plain text of the file
+{
+  # Outaide code sections: Wrap long lines, print short lines and as-is
+  if (code_section == 0)
+    print_folded($0, "\033[0m")
+  else
+    print("\033[0;32m" $0)
+}
-- 
2.25.1