1 files changed, 67 insertions, 0 deletions
diff --git a/src/z/parser/js/formatter.zig b/src/z/parser/js/formatter.zig
new file mode 100644
index 0000000..fbea7bc
--- /dev/null
+++ b/src/z/parser/js/formatter.zig
@@ -0,0 +1,67 @@
+const std = @import("std");
+
+pub const FormatOptions = struct {
+    indent_size: usize = 4,
+    minify: bool = false,
+};
+
+pub const Formatter = struct {
+    buf: []u8,
+    pos: usize,
+    indent_level: usize,
+    options: FormatOptions,
+    last_char: u8 = 0,
+
+    pub fn write(self: *@This(), s: []const u8) void {
+        if (self.options.minify) {
+            if (s.len == 0) return;
+            var start: usize = 0;
+            while (start < s.len and s[start] == ' ') start += 1;
+            var end = s.len;
+            while (end > start and s[end - 1] == ' ') end -= 1;
+            if (start >= end) return;
+            const trimmed = s[start..end];
+            if (self.last_char != 0 and isWordChar(self.last_char) and isWordChar(trimmed[0])) {
+                self.buf[self.pos] = ' ';
+                self.pos += 1;
+            }
+            @memcpy(self.buf[self.pos..][0..trimmed.len], trimmed);
+            self.pos += trimmed.len;
+            self.last_char = trimmed[trimmed.len - 1];
+        } else {
+            @memcpy(self.buf[self.pos..][0..s.len], s);
+            self.pos += s.len;
+        }
+    }
+
+    pub fn writeChar(self: *@This(), c: u8) void {
+        self.buf[self.pos] = c;
+        self.pos += 1;
+        self.last_char = c;
+    }
+
+    pub fn writeIndent(self: *@This()) void {
+        if (self.options.minify) return;
+        const spaces = self.indent_level * self.options.indent_size;
+        var i: usize = 0;
+        while (i < spaces) : (i += 1) {
+            self.writeChar(' ');
+        }
+    }
+
+    pub fn newline(self: *@This()) void {
+        if (self.options.minify) return;
+        self.writeChar('\n');
+    }
+
+    pub fn writeSpace(self: *@This()) void {
+        if (!self.options.minify) self.writeChar(' ');
+    }
+
+    fn isWordChar(c: u8) bool {
+        return switch (c) {
+            'a'...'z', 'A'...'Z', '0'...'9', '_', '$' => true,
+            else => false,
+        };
+    }
+};