Start with backend

installer/CMakeLists.txt

@@ -1,4 +1,16 @@
-add_executable(installer main.cpp ui.cpp ui.hpp meta.cpp meta.hpp info.hpp)
+add_executable(installer
+	main.cpp
+	ui.cpp
+	ui.hpp
+	meta.cpp
+	meta.hpp
+	info.hpp
+	installer.cpp
+	installer.hpp
+	installer_windows.cpp
+	installer_mac.cpp
+	installer_linux.cpp
+)
 
 configure_file(info.hpp.in info.hpp)
 

installer/installer.cpp

@@ -0,0 +1 @@
+#include "installer.hpp"

installer/installer.hpp

@@ -0,0 +1,7 @@
+#pragma once
+
+#include <wx/filename.h>
+
+wxFileName get_launcher_data_dir();
+
+bool is_launcher_open();

installer/installer_linux.cpp

@@ -0,0 +1,81 @@
+#include "installer.hpp"
+#include <wx/dir.h>
+#include <wx/utils.h>
+
+#ifdef __LINUX__
+
+wxFileName get_launcher_data_dir() {
+	const wxString home = wxGetHomeDir();
+	const wxFileName dir = wxFileName::DirName(home + "/.minecraft");
+
+	if (!dir.DirExists()) {
+		const wxFileName flatpak_dir = wxFileName::DirName(home + "/.var/app/com.mojang.Minecraft/.minecraft");
+
+		// if the flatpak directory is the only directory present, use it
+		// otherwise we will make the  for the official launcher
+		if (flatpak_dir.DirExists())
+			return flatpak_dir;
+	}
+
+	return dir;
+}
+
+bool is_launcher_open() {
+	auto filter = [](const wxString &arg) {
+		return arg == "minecraft-launcher" || arg.EndsWith("/minecraft-launcher") ||
+			   (arg.StartsWith("--log-file=") && arg.EndsWith(".minecraft/launcher_cef_log.txt"));
+	};
+
+	wxDir dir("/proc");
+	if (!dir.IsOpened())
+		return {};
+
+	wxString proc_entry;
+
+	for (bool has_more = dir.GetFirst(&proc_entry, wxEmptyString, wxDIR_DIRS); has_more;
+		 has_more = dir.GetNext(&proc_entry)) {
+		bool is_pid =
+			std::all_of(proc_entry.begin(), proc_entry.end(), [](auto chr) { return chr >= '0' && chr <= '9'; });
+
+		if (!is_pid)
+			continue;
+
+		wxFile cmdline_file(dir.GetNameWithSep() + proc_entry + "/cmdline", wxFile::read);
+
+		if (!cmdline_file.IsOpened())
+			continue;
+
+		// unfortunately, c style code is needed here, watch out for buffer overflow :|
+		// wx does not like \0
+
+		char buffer[BUFSIZ];
+		ssize_t read;
+
+		wxString current_content;
+		std::vector<wxString> args;
+
+		while ((read = cmdline_file.Read(buffer, BUFSIZ)) != wxInvalidOffset && read != 0) {
+			for (size_t index = 0; index < read; ++index) {
+				char value = buffer[index];
+
+				if (value == '\0') {
+					if (!current_content.empty()) {
+						args.push_back(current_content);
+						current_content.clear();
+					}
+				} else
+					current_content += value;
+			}
+		}
+
+		if (!current_content.empty())
+			args.push_back(current_content);
+
+		if (std::any_of(args.begin(), args.end(), filter))
+			return true;
+	}
+
+	return false;
+}
+
+#endif

installer/installer_mac.cpp

@@ -0,0 +1,16 @@
+#include "installer.hpp"
+#include <wx/dir.h>
+#include <wx/utils.h>
+
+#ifdef __DARWIN__
+
+wxFileName get_launcher_data_dir() {
+	return wxFileName::DirName(wxGetHomeDir() + "/Library/Application Support/minecraft");
+}
+
+bool is_launcher_open() {
+	wxASSERT_MSG(false, "TODO");
+	return false; // TODO
+}
+
+#endif

installer/installer_windows.cpp

@@ -0,0 +1,16 @@
+#include "installer.hpp"
+#include <wx/dir.h>
+#include <wx/utils.h>
+
+#ifdef __WINDOWS__
+
+wxFileName get_launcher_data_dir() {
+	return wxFileName::DirName(wxStandardPaths::Get().GetUserConfigDir() + "\\.minecraft");
+}
+
+bool is_launcher_open() {
+	wxASSERT_MSG(false, "TODO");
+	return false; // TODO
+}
+
+#endif

installer/resources/InstallerFrame_UI.fbp

@@ -50,7 +50,7 @@
       <property name="minimum_size"></property>
       <property name="name">InstallerFrame_UI</property>
       <property name="pos"></property>
-      <property name="size">500,450</property>
+      <property name="size">500,480</property>
       <property name="style">wxDEFAULT_FRAME_STYLE</property>
       <property name="subclass">; ; forward_declare</property>
       <property name="title">FrogLoader Installer</property>
@@ -74,6 +74,16 @@
             <property name="name">options</property>
             <property name="orient">wxVERTICAL</property>
             <property name="permission">none</property>
+            <object class="sizeritem" expanded="true">
+              <property name="border">5</property>
+              <property name="flag">wxEXPAND</property>
+              <property name="proportion">1</property>
+              <object class="spacer" expanded="true">
+                <property name="height">0</property>
+                <property name="permission">protected</property>
+                <property name="width">0</property>
+              </object>
+            </object>
             <object class="sizeritem" expanded="true">
               <property name="border">5</property>
               <property name="flag">wxALL</property>
@@ -839,6 +849,16 @@
                 </object>
               </object>
             </object>
+            <object class="sizeritem" expanded="true">
+              <property name="border">5</property>
+              <property name="flag">wxEXPAND</property>
+              <property name="proportion">1</property>
+              <object class="spacer" expanded="true">
+                <property name="height">0</property>
+                <property name="permission">protected</property>
+                <property name="width">0</property>
+              </object>
+            </object>
           </object>
         </object>
         <object class="sizeritem" expanded="false">

installer/resources/InstallerFrame_UI.xrc

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
 <resource xmlns="http://www.wxwidgets.org/wxxrc" version="2.5.3.0">
   <object class="wxFrame" name="InstallerFrame_UI">
-    <size>500,450</size>
+    <size>500,480</size>
     <style>wxDEFAULT_FRAME_STYLE|wxTAB_TRAVERSAL</style>
     <title>FrogLoader Installer</title>
     <centered>1</centered>
@@ -14,6 +14,12 @@
         <option>1</option>
         <object class="wxBoxSizer" name="options">
           <orient>wxVERTICAL</orient>
+          <object class="spacer">
+            <flag>wxEXPAND</flag>
+            <border>5</border>
+            <option>1</option>
+            <size>0,0</size>
+          </object>
           <object class="sizeritem">
             <flag>wxALL</flag>
             <border>5</border>
@@ -158,6 +164,12 @@
               </object>
             </object>
           </object>
+          <object class="spacer">
+            <flag>wxEXPAND</flag>
+            <border>5</border>
+            <option>1</option>
+            <size>0,0</size>
+          </object>
         </object>
       </object>
       <object class="sizeritem">

installer/ui.cpp

@@ -1,5 +1,10 @@
 #include "ui.hpp"
+#include "installer.hpp"
 
 InstallerFrame::InstallerFrame() : InstallerFrame_UI(nullptr) {
-	heading->SetFont(heading->GetFont().Scaled(2));
+	heading->SetFont(heading->GetFont().Scaled(1.6F));
+	launcher_data_dir_input->ChangeValue(get_launcher_data_dir().GetFullPath());
+	game_data_dir_input->SetHint(_("Use Default"));
+
+	cancel->Bind(wxEVT_BUTTON, [this] (wxCommandEvent &) { Close(); });
 }