fixed some spacing problems, properly handling cli arguments now

build.zig

@@ -21,6 +21,8 @@ pub fn build(b: *std.Build) void {
     exe.linkLibC();
     exe.root_module.addImport("grapheme", zg.module("grapheme"));
     exe.root_module.addImport("DisplayWidth", zg.module("DisplayWidth"));
+    const clap = b.dependency("clap", .{});
+    exe.root_module.addImport("clap", clap.module("clap"));
 
     b.installArtifact(exe);
 

build.zig.zon

@@ -19,6 +19,10 @@
             .url = "https://codeberg.org/dude_the_builder/zg/archive/v0.13.2.tar.gz",
             .hash = "122055beff332830a391e9895c044d33b15ea21063779557024b46169fb1984c6e40",
         },
+        .clap = .{
+            .url = "git+https://github.com/Hejsil/zig-clap#c0193e9247335a6c1688b946325060289405de2a",
+            .hash = "12207ee987ce045596cb992cfb15b0d6d9456e50d4721c3061c69dabc2962053644d",
+        },
     },
     .paths = .{
         // This makes *all* files, recursively, included in this package. It is generally

src/print.zig

@@ -1,8 +1,8 @@
-//TODO: program is adding way more spacing than necessary at the bottom of pages, suspect the c lib
-// is computing size strangely
 //c library usage based on https://medium.com/@eddo2626/lets-learn-zig-4-using-c-libraries-in-zig-5fcc3206f0dc
 const std = @import("std");
 const clap = @import("clap");
+
+//using the zg lib: https://codeberg.org/dude_the_builder/zg
 const DisplayWidth = @import("DisplayWidth");
 const c = @cImport({
     @cInclude("pdfgen.h");
@@ -19,7 +19,7 @@ const assert = std.debug.assert;
 const Card = struct {
     name: []const u8 = "",          //string
     mana_cost: []const u8 = "",     //string
-    cmc: f32 = 0, //technically a float? but I think we can always cast safely cast. EDIT: NOPE
+    cmc: f32 = 0,                   //float
     type_line: []const u8 = "",     //string
     oracle_text: []const u8 = "",   //string
     power: []const u8 = "",         //coerced to string
@@ -44,7 +44,7 @@ const cardWidth = 30;
 const cardHeight = 32;
 const minCardHeight = 5;
 const pageHeight = 66;      
-var heightMayVary = true;
+var heightMayVary = true;   //whether or not cards must have a constant height
 
 const formatString = "{s: <" ++ std.fmt.digits2(cardWidth) ++ "}";
 const lineFormatter = "|" ++ formatString;
@@ -60,19 +60,26 @@ test "Check constants" {
 }
 
 pub fn main() !void {
-    var args = try std.process.argsWithAllocator(std.heap.page_allocator);
-
-    //TODO: properly handle program arguments
-    _ = args.next(); //handle program name (args[0])
-    const listFileName: []const u8 = args.next() orelse {
-        return error.ExpectedArgument;
-    };
-    heightMayVary = stringToBool(args.next());
+    // var args = try std.process.argsWithAllocator(std.heap.page_allocator);
 
     var arena = std.heap.ArenaAllocator.init(std.heap.page_allocator);
     defer arena.deinit();
     const allocator = arena.allocator();
 
+    const params = comptime clap.parseParamsComptime(
+        \\-h, --help            Display this help and exit.
+        \\-l, --listFile <str>  The list of cards to print       
+        \\
+    );
+
+    const res = clap.parse(clap.Help, &params, clap.parsers.default, .{
+        .allocator = allocator,
+    }) catch |err| {
+        return err;
+    };
+    if(res.args.listFile == null) return error.ExpectedArgument;
+    const listFileName = res.args.listFile.?;
+
     const oracleFile = try cwd.openFile(oracleFileName, .{});
     var jsonReader = json.reader(allocator, oracleFile.reader());
     const parsedJson = try json.parseFromTokenSource([]Card, allocator, &jsonReader, .{ .ignore_unknown_fields = true });
@@ -99,9 +106,9 @@ pub fn main() !void {
 
     cards.sort(CardSortContext{ .list = cards.values() });
     var allPrinted = std.ArrayList([]const u8).init(allocator);
-
-    const pdf_doc: *c.pdf_doc = @ptrCast(c.pdf_create(c.PDF_A4_WIDTH, c.PDF_A4_HEIGHT, &c.pdf_info{ .creator = ("My Software" ++ " " ** 53).* }).?);
-    _ = c.pdf_set_font(pdf_doc, "Times-Roman");
+    const pdfHeight = c.PDF_LETTER_HEIGHT;
+    const pdfWidth = c.PDF_LETTER_WIDTH;
+    const pdf_doc: *c.pdf_doc = @ptrCast(c.pdf_create(pdfWidth, pdfHeight, &c.pdf_info{ .creator = ("My Software" ++ " " ** 53).* }).?);
 
     var rowToPrint = std.ArrayList(TextCard).init(allocator);
     for (cards.values()) |cardText| {
@@ -124,10 +131,10 @@ pub fn main() !void {
         const pageRelative = rowNum % pageHeight;
         const pageOffset: f32 = 12 * @as(f32, @floatFromInt(pageRelative));
         if (pageRelative != 0) {
-            _ = c.pdf_add_text(pdf_doc, page, try std.mem.Allocator.dupeZ(allocator, u8, text), 8, 10, c.PDF_A4_HEIGHT - pageOffset, c.PDF_BLACK);
+            _ = c.pdf_add_text(pdf_doc, page, try std.mem.Allocator.dupeZ(allocator, u8, text), 8, 10, pdfHeight - pageOffset, c.PDF_BLACK);
         } else {
             page = c.pdf_append_page(pdf_doc);
-            _ = c.pdf_add_text(pdf_doc, page, try std.mem.Allocator.dupeZ(allocator, u8, text), 8, 10, c.PDF_A4_HEIGHT - pageOffset, c.PDF_BLACK);
+            _ = c.pdf_add_text(pdf_doc, page, try std.mem.Allocator.dupeZ(allocator, u8, text), 8, 10, pdfHeight - pageOffset, c.PDF_BLACK);
         }
     }
 
@@ -206,7 +213,6 @@ const cardRow = struct {
     third: []const u8 = spacer,
     last: []const u8 = "\n",
     fn print(allocator: std.mem.Allocator, cards: []TextCard, allPrinted: *std.ArrayList([]const u8)) !void {
-        // _ = allocator;
         var gpa = std.heap.GeneralPurposeAllocator(.{}){};
 
         var lines = linesList{};
@@ -215,15 +221,11 @@ const cardRow = struct {
         const dw = DisplayWidth{ .data = &dwd };
 
         for (cards, 0..) |cardObj, cardNo| {
-            //const cardText = try card(cardObj);
             const cardText = cardObj.lines;
             for (cardText, 0..) |line, idx| {
-                //this step is probably unnecessary
                 const strippedLine = std.mem.trimRight(u8, line, " ");
                 const paddedLine = try std.fmt.allocPrint(gpa.allocator(), lineFormatter, .{strippedLine});
-                // const theoreticalLength = (paddedLine.len * 3) + 1;
                 assert(dw.strWidth(paddedLine) == dw.strWidth(spacer));
-                // assert(theoreticalLength == pageWidth);
                 const placeholder = if (idx < lines.items(.first).len) lines.get(idx) else cardRow{};
                 const new: cardRow = switch (cardNo) {
                     0 => .{ .first = paddedLine },
@@ -244,9 +246,8 @@ const cardRow = struct {
         }
         for (lines.items(.first), 0..) |_, idx| {
             const line = lines.get(idx);
-            // const printedWidth = line + line.second.len + line.third.len + line.last.len;
-            // assert(printedWidth == pageWidth);
             const fullLine = try std.mem.concat(gpa.allocator(), u8, &[_][]const u8{ line.first, line.second, line.third, line.last });
+            assert(dw.strWidth(fullLine) == dw.strWidth(fullWidthSpacer));
             try allPrinted.append(fullLine);
         }
     }