initial commit.main

1 files changed, 166 insertions, 0 deletions

diff --git a/mdview.sh b/mdview.sh
new file mode 100755
index 0000000..1f95105
--- /dev/null
+++ b/mdview.sh
@@ -0,0 +1,166 @@
+#!/bin/sh
+
+# mdview - simple markdown viewer
+# Usage: mdview [--light|--dark|--auto] [--live] <file.md>
+
+theme="auto"
+live_mode=0
+filename=""
+# lang="en" - maybe support language tags later
+
+for arg in "$@"; do
+	case "$arg" in
+		--light) theme="light" ;;
+		--dark) theme="dark" ;;
+		--auto) theme="auto" ;;
+		--live|-w) live_mode=1 ;;
+		--help|-h)
+			echo "Usage: mdview [--light|--dark|--auto] [--live] <file.md>"
+			echo "	--light   Light theme"
+			echo "	--dark	  Dark theme"
+			echo "	--auto	  Follow system (default)"
+			echo "	--live	  Watch file for changes"
+			exit 0
+			;;
+		*) filename="$arg" ;;
+	esac
+done
+
+if [ -z "$filename" ]; then
+	echo "Usage: mdview [--light|--dark|--auto] [--live] <file.md>" >&2
+	exit 1
+fi
+
+# Resolve the base directory for relative paths
+if [ "$filename" = "-" ]; then
+    base_dir="file://$(pwd)/"
+else
+    base_dir="file://$(cd "$(dirname "$filename")" && pwd)/"
+fi
+
+case "$theme" in
+	light)
+		css_file="$HOME/.config/mdview/github-markdown-light.css"
+		page_background="#ffffff"
+		page_scheme="light"
+		;;
+	dark)
+		css_file="$HOME/.config/mdview/github-markdown-dark.css"
+		page_background="#0d1117"
+		page_scheme="dark"
+		;;
+	auto)
+		css_file="$HOME/.config/mdview/github-markdown.css"
+		page_background="Canvas"
+		page_scheme="light dark"
+		;;
+esac
+
+html() {
+	if [ "$filename" = "-" ]; then
+		body=$(cat | cmark-gfm --width 80 --unsafe)
+	else
+		body=$(cmark-gfm --width 80 --unsafe "$filename")
+	fi
+
+	cat <<EOF
+<!doctype html>
+<html lang="en">
+<head>
+	<meta charset="utf-8">
+	<meta name="viewport" content="width=device-width, initial-scale=1">
+	<base href="$base_dir">
+	<style>
+	:root {
+		color-scheme: $page_scheme;
+	}
+
+	html,
+	body {
+		min-height: 100%;
+	}
+
+	body {
+		margin: 0;
+		background-color: $page_background;
+	}
+
+	.markdown-body {
+		box-sizing: border-box;
+		min-width: 200px;
+		max-width: 980px;
+		min-height: 100vh;
+		margin: 0 auto;
+		padding: 45px;
+	}
+
+	@media (max-width: 767px) {
+		.markdown-body {
+			padding: 15px;
+		}
+	}
+	</style>
+</head>
+<body>
+	<article class="markdown-body">
+$body
+	</article>
+</body>
+</html>
+EOF
+}
+
+if [ "$live_mode" -eq 1 ]; then
+	if [ "$filename" = "-" ]; then
+		echo "mdview: --live cannot be used with standard input" >&2
+		exit 1
+	fi
+
+	tmp=$(mktemp /tmp/mdview_live_XXXXXX.html)
+	surf_pid=""
+
+	cleanup() {
+		[ -n "$surf_pid" ] && kill "$surf_pid" 2>/dev/null
+		rm -f "$tmp"
+	}
+
+	render() {
+		html > "$tmp" || return 1
+
+		if [ -n "$surf_pid" ]; then
+			kill -HUP "$surf_pid" 2>/dev/null || return 1
+		fi
+	}
+
+	trap cleanup EXIT INT TERM
+
+	render || exit 1
+
+	echo "Live preview: $filename (theme: $theme)"
+	echo "Press Ctrl+C to stop"
+
+	# -d disables surf's disk cache.
+	surf -d -C "$css_file" "$tmp" &
+	surf_pid=$!
+
+	old_sum=$(cksum < "$filename") || exit 1
+
+	while kill -0 "$surf_pid" 2>/dev/null; do
+		sleep 1
+
+		new_sum=$(cksum < "$filename") || continue
+		[ "$new_sum" = "$old_sum" ] && continue
+
+		old_sum=$new_sum
+
+		if render; then
+			echo "Updated: $filename"
+		fi
+	done
+else
+	tmp=$(mktemp /tmp/mdview_XXXXXX.html)
+	html > "$tmp"
+	surf -C "$css_file" "$tmp"
+	rm -f "$tmp"
+fi
+