From 650414865461c075ec4efd00c4ee947ccb1d1bfb Mon Sep 17 00:00:00 2001
From: Robert <robert.altner@stud.htwk-leipzig.de>
Date: Mon, 30 Jan 2023 17:14:20 +0100
Subject: [PATCH] add logger module

---
 CMakeLists.txt            |  3 ++
 src/CMakeLists.txt        | 15 +++++++-
 src/debugger/Debugger.cpp |  5 +++
 src/debugger/Logger.cpp   | 80 +++++++++++++++++++++++++++++++++++++++
 src/debugger/Logger.hpp   | 29 ++++++++++++++
 5 files changed, 131 insertions(+), 1 deletion(-)
 create mode 100644 src/debugger/Logger.cpp
 create mode 100644 src/debugger/Logger.hpp

diff --git a/CMakeLists.txt b/CMakeLists.txt
index f72251b..92952b7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,6 +5,9 @@ cmake_minimum_required (VERSION 3.8)
 
 project ("NES Emulator")
 
+set(CMAKE_CXX_STANDARD_REQUIRED 17)
+set(CMAKE_CXX_STANDARD 17)
+
 find_package(glfw3)
 if(NOT glfw3_FOUND)
 	add_subdirectory("vendor/glfw")
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 593c13c..00cd492 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -7,13 +7,26 @@ add_executable(nesemu
 	"mappers/Mapper000.cpp" 
 	"Log.cpp" 
 	"PPU.cpp" 
+	"APU.cpp" 
 	"gfx/Window.cpp"
+	"gfx/Input.cpp" 
+	"gfx/Screen.cpp" 
 	"debugger/CPUWatcher.cpp"
 	"debugger/Debugger.cpp" 
 	"debugger/PPUWatcher.cpp" 
 	"debugger/Disassembler.cpp" 
 	"debugger/MemoryViewer.cpp" 
-	"debugger/NametableViewer.cpp"  "ControllerPort.cpp" "controllers/StandardController.cpp" "gfx/Input.cpp" "debugger/ControllerPortViewer.cpp" "gfx/Screen.cpp" "debugger/Palettes.cpp" "APU.cpp" "debugger/PatternTableViewer.cpp" "mappers/Mapper003.cpp" "mappers/Mapper001.cpp" "debugger/OAMViewer.cpp")
+	"debugger/NametableViewer.cpp"
+	"debugger/ControllerPortViewer.cpp" 
+	"debugger/PatternTableViewer.cpp" 
+	"debugger/OAMViewer.cpp"
+	"debugger/Palettes.cpp" 
+	"debugger/Logger.cpp"
+	"ControllerPort.cpp"
+	"controllers/StandardController.cpp"
+	"mappers/Mapper003.cpp" 
+	"mappers/Mapper001.cpp" 
+	)
 
 target_include_directories(nesemu PRIVATE
 	mappers
diff --git a/src/debugger/Debugger.cpp b/src/debugger/Debugger.cpp
index f745ff0..b00e058 100644
--- a/src/debugger/Debugger.cpp
+++ b/src/debugger/Debugger.cpp
@@ -14,6 +14,7 @@
 #include "PatternTableViewer.hpp"
 #include "ControllerPortViewer.hpp"
 #include "Palettes.hpp"
+#include "Logger.hpp"
 
 Debugger::Debugger(Bus* bus) :
 	bus(bus)
@@ -32,6 +33,9 @@ Debugger::Debugger(Bus* bus) :
 	windows.push_back(new PatternTableViewer(this, bus->cartridge.GetMapper()));
 	windows.push_back(new ControllerPortViewer(this, &bus->controllerPort));
 	windows.push_back(new Palettes(this, bus));
+
+	Logger::Init(this);
+	windows.push_back(Logger::GetInstance());	
 }
 
 Debugger::~Debugger()
@@ -42,6 +46,7 @@ Debugger::~Debugger()
 
 bool Debugger::Frame()
 {
+	Logger::GetInstance()->Log("Debugger", "Frame!\n");
 	try
 	{
 		while (!bus->ppu.IsFrameDone())
diff --git a/src/debugger/Logger.cpp b/src/debugger/Logger.cpp
new file mode 100644
index 0000000..73b7fd8
--- /dev/null
+++ b/src/debugger/Logger.cpp
@@ -0,0 +1,80 @@
+#include "Logger.hpp"
+
+#include <imgui/imgui.h>
+
+Logger::Logger(Debugger* debugger) :
+    DebugWindow("Log", debugger), autoScroll(true)
+{
+    buffer.clear();
+
+    offsets.clear();
+    offsets.push_back(0);
+}
+
+void Logger::Init(Debugger* debugger) 
+{
+    if (Logger::instance != nullptr) {
+        return;
+    }
+
+    Logger::instance = new Logger(debugger);
+}
+
+void Logger::Log(const char* module, const char* fmt, ...) 
+{
+    int old_size = buffer.size();
+    va_list args;
+    va_start(args, fmt);
+
+    buffer.appendf("[%s] ", module);
+    buffer.appendfv(fmt, args);
+    va_end(args);
+
+    for (int new_size = buffer.size(); old_size < new_size; old_size++) {
+        if (buffer[old_size] == '\n') {
+            offsets.push_back(old_size + 1);
+        }
+    }
+}
+
+void Logger::OnRender() 
+{
+    ImGui::SetNextWindowSize(ImVec2(400, 400), ImGuiCond_FirstUseEver);
+
+    if (!ImGui::Begin(title.c_str(), &isOpen)) {
+        ImGui::End();
+        return;
+    }
+
+    if (ImGui::BeginPopup("Options")) {
+        ImGui::Checkbox("Auto scroll", &autoScroll);
+        ImGui::EndPopup();
+    }
+
+    if (ImGui::BeginChild("scrolling", ImVec2(0, 0), false, ImGuiWindowFlags_HorizontalScrollbar))
+        {
+            ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(0, 0));
+            const char* buf = buffer.begin();
+            const char* buf_end = buffer.end();
+
+            ImGuiListClipper clipper;
+            clipper.Begin((int)offsets.size());
+            while (clipper.Step())
+            {
+                for (int line_no = clipper.DisplayStart; line_no < clipper.DisplayEnd; line_no++)
+                {
+                    const char* line_start = buf + offsets[line_no];
+                    const char* line_end = (line_no + 1 < offsets.size()) ? (buf + offsets[line_no + 1] - 1) : buf_end;
+                    ImGui::TextUnformatted(line_start, line_end);
+                }
+            }
+            clipper.End();
+            ImGui::PopStyleVar();
+
+            if (autoScroll && ImGui::GetScrollY() >= ImGui::GetScrollMaxY())
+                ImGui::SetScrollHereY(1.0f);
+        }
+        ImGui::EndChild();
+
+    ImGui::End();
+}
\ No newline at end of file
diff --git a/src/debugger/Logger.hpp b/src/debugger/Logger.hpp
new file mode 100644
index 0000000..d8a861c
--- /dev/null
+++ b/src/debugger/Logger.hpp
@@ -0,0 +1,29 @@
+#pragma once
+
+#include <vector>
+#include <imgui/imgui.h>
+#include "DebugWindow.hpp"
+
+class Logger final: 
+    public DebugWindow 
+{
+public:
+    static void Init(Debugger* debugger);
+
+    static Logger* GetInstance() {
+        return instance;
+    }
+
+    void Log(const char* module, const char* fmt, ...);
+    virtual void OnRender() override;
+
+private:
+    Logger(Debugger* debugger);
+
+private:
+    inline static Logger* instance = nullptr;
+
+    ImGuiTextBuffer buffer;
+    std::vector<int> offsets;
+    bool autoScroll;
+};
\ No newline at end of file