From dfc9d94cf525322e92b17b33fa86b9d8aecc0f46 Mon Sep 17 00:00:00 2001
From: "Zed A. Shaw" <zed.shaw@gmail.com>
Date: Fri, 15 Aug 2025 13:23:04 -0400
Subject: [PATCH] Can now go full screen and change backgrounds.

---
 Makefile                          |  8 +--
 main.cpp                          | 89 ++++++++++++++++++++++++++-----
 sample/01-a-good-first-program.md | 15 ++++++
 3 files changed, 96 insertions(+), 16 deletions(-)

diff --git a/Makefile b/Makefile
index e632d6e..46352a5 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,5 @@
+SAMPLE=./sample/01-a-good-first-program.md
+
 all: build
 
 reset:
@@ -25,16 +27,16 @@ tracy_build:
 run: build
 ifeq '$(OS)' 'Windows_NT'
 	powershell "cp ./builddir/besos.exe ."
-	./besos
+	./besos ${SAMPLE}
 else
-	./builddir/game
+	./builddir/besos ${SAMPLE}
 endif
 
 debug: build
 	gdb --nx -x .gdbinit --ex run --args builddir/besos
 
 debug_run: build
-	gdb --nx -x .gdbinit --batch --ex run --ex bt --ex q --args builddir/besos
+	gdb --nx -x .gdbinit --batch --ex run --ex bt --ex q --args builddir/besos ${SAMPLE}
 
 clean:
 	meson compile --clean -C builddir
diff --git a/main.cpp b/main.cpp
index c2c0078..dc0a3a8 100644
--- a/main.cpp
+++ b/main.cpp
@@ -7,24 +7,32 @@
 #include <nlohmann/json.hpp>
 #include "dbc.hpp"
 #include <memory>
+#include <filesystem>
+#include <fstream>
+#include <iostream>
 
-constexpr const int WINDOW_WIDTH=1280;
-constexpr const int WINDOW_HEIGHT=720;
+int WINDOW_WIDTH=1280;
+int WINDOW_HEIGHT=720;
 constexpr const int FRAME_LIMIT=60;
 constexpr const bool VSYNC=true;
+constexpr const int TITLE_SIZE=84;
+constexpr const int CONTENT_SIZE=56;
 
 using std::string, std::wstring, std::shared_ptr, std::make_shared;
 using nlohmann::json;
+namespace fs = std::filesystem;
 
 struct Slide {
   guecs::UI $gui;
   wstring $title;
   wstring $content;
+  json $config;
   bool $initialized = false;
 
-  Slide(const string& title, const string& content) :
+  Slide(const string& title, const string& content, json& config) :
     $title(guecs::to_wstring(title)),
-    $content(guecs::to_wstring(content))
+    $content(guecs::to_wstring(content)),
+    $config(config)
   {
   }
 
@@ -42,12 +50,12 @@ struct Slide {
 
       auto title = $gui.entity("title");
       $gui.set<guecs::Text>(title, {
-          $title, 124});
+          $title, TITLE_SIZE});
 
       auto content = $gui.entity("content");
       $gui.set<guecs::Text>(content, {
           $content,
-          56, guecs::THEME.TEXT_COLOR, 20});
+          CONTENT_SIZE, guecs::THEME.TEXT_COLOR, 20});
 
       $gui.init();
     }
@@ -115,6 +123,17 @@ struct SlidesUI {
 
   void show_slide() {
     auto& slide = current();
+    auto& bg = $gui.get<guecs::Background>($gui.MAIN);
+    sf::Color color = guecs::THEME.FILL_COLOR;
+
+    if(slide.$config.contains("bg_color")) {
+      auto color_conf = slide.$config["bg_color"];
+      color = {color_conf[0], color_conf[1], color_conf[2], color_conf[3]};
+    }
+
+    bg.set_color(color);
+    bg.init();
+
     auto& cell = $gui.cell_for("slide");
     slide.init(cell);
   }
@@ -143,24 +162,68 @@ struct SlidesUI {
 shared_ptr<SlideDeck> parse_slides(const string& md_file) {
   shared_ptr<SlideDeck> slides = make_shared<SlideDeck>();
 
-  for(int i = 0; i < 10; i++) {
-    slides->emplace_back(fmt::format("Title {}", i),"content");
+  dbc::check(fs::exists(md_file), "md file missing");
+
+  auto size = fs::file_size(md_file);
+  string line(size, '\0');
+  bool started = false;
+  json config;
+
+  if(std::ifstream in_file{md_file, std::ios::binary}) {
+    while(std::getline(in_file, line)) {
+      if(line == "{") {
+        string json_data;
+
+        do {
+          json_data += line;
+        } while (std::getline(in_file, line) && line != "}");
+
+        json_data += "}";
+
+        config = json::parse(json_data);
+        std::cout << "JSON: " << config << '\n';
+      } else if(line == "===") {
+        fmt::println("START");
+        started = true;
+      } else if(line == "---") {
+        fmt::println("START SLIDE");
+      } else {
+        if(started) {
+          string title = line;
+          string content;
+
+          while(std::getline(in_file, line) && line != "---") {
+            content += line + "\n";
+          }
+
+          slides->emplace_back(title, content, config);
+          config = json::parse("{}");
+        } else {
+          fmt::println("JUNK: {}", line);
+        }
+      }
+    }
   }
 
-  (void)md_file;
-
   return slides;
 }
 
-int main() {
+int main(int argc, char *argv[]) {
+
+  dbc::check(argc == 2, "USAGE: besos my_fucking_slides.md");
+
   sfml::Backend backend;
   guecs::init(&backend);
 
-  sf::RenderWindow window(sf::VideoMode({WINDOW_WIDTH, WINDOW_HEIGHT}), "Besos Loves Slides");
+  auto& modes = sf::VideoMode::getFullscreenModes();
+  WINDOW_WIDTH = modes[1].size.x;
+  WINDOW_HEIGHT = modes[1].size.y;
+
+  sf::RenderWindow window(modes[1], "Besos Loves Slides", sf::Style::None);
   window.setFramerateLimit(FRAME_LIMIT);
   window.setVerticalSyncEnabled(VSYNC);
 
-  auto data = parse_slides("some_bullshit.md");
+  auto data = parse_slides(argv[1]);
   SlidesUI slides(data);
   slides.init();
 
diff --git a/sample/01-a-good-first-program.md b/sample/01-a-good-first-program.md
index 2ea36d3..887b0db 100644
--- a/sample/01-a-good-first-program.md
+++ b/sample/01-a-good-first-program.md
@@ -4,14 +4,29 @@
 }
 ===
 1: A Good First Program
+
+* The key is this
+* That's what we want
 ---
 What You Should See
+
+Yes, but with more feeling.
 ---
+{
+"bg_color": [255, 0, 0, 255]
+}
 Study Drills
+
+Besos would be proud.
 ---
 Common Student Questions
+
+- This again.
+- That too.
 ---
 The Blue Plus
+
+_You must find it_.
 ---
 The End