From bfaab4bc7f087cee86331a97569011418689223d Mon Sep 17 00:00:00 2001
From: Mubashshir <ahmubashshir@gmail.com>
Date: Sat, 7 Jun 2025 01:52:18 +0600
Subject: [PATCH] cr3qt: Implement xdg-basedirs spec

Fixes #325

Signed-off-by: Mubashshir <ahmubashshir@gmail.com>
---
 CMakeLists.txt           |  6 ++++++
 cr3qt/CMakeLists.txt     |  9 +++++++++
 cr3qt/src/mainwindow.cpp | 41 ++++++++++++++++++++++++++++++++++++++--
 3 files changed, 54 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 254b8cd6f..9e738e5b4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -147,10 +147,16 @@ if( ${GUI} STREQUAL QT5 )
   FIND_PACKAGE( Qt5Core REQUIRED )
   FIND_PACKAGE( Qt5Widgets REQUIRED )
   FIND_PACKAGE( Qt5LinguistTools REQUIRED )
+  FIND_PACKAGE( Qt5Xdg QUIET)
   include_directories(${Qt5Widgets_INCLUDE_DIRS})
   add_definitions(${Qt5Widgets_DEFINITIONS})
   include_directories(${Qt5Core_INCLUDE_DIRS})
   add_definitions(${Qt5Core_DEFINITIONS})
+  if(NOT Qt5Xdg_FOUND)
+    message("Qt5Xdg not found: xdg-basedirs-spec support disabled.\n")
+  else()
+    message("Qt5Xdg(${Qt5Xdg_VERSION}) found, xdg-basedirs-spec support enabled.\n")
+  endif(NOT Qt5Xdg_FOUND)
 endif( ${GUI} STREQUAL QT5 )
 
 # thirdparty sources definitions
diff --git a/cr3qt/CMakeLists.txt b/cr3qt/CMakeLists.txt
index 9830ddcdd..231af574b 100644
--- a/cr3qt/CMakeLists.txt
+++ b/cr3qt/CMakeLists.txt
@@ -50,6 +50,10 @@ ELSE()
     ADD_DEFINITIONS(-DCR3_DATA_DIR="")
 ENDIF(MAC)
 
+if(Qt5Xdg_FOUND)
+    ADD_DEFINITIONS(-DUSE_QT5_XDG=1)
+ENDIF(Qt5Xdg_FOUND)
+
 ADD_DEFINITIONS("${Qt5Core_EXECUTABLE_COMPILE_FLAGS}")
 
 #IF (WIN32)
@@ -174,6 +178,11 @@ IF(MAC)
 ELSE()
     SET (EXTRA_LIBS ${STD_LIBS} ${QT_LIBRARIES} ${Qt5Core_LIBRARIES} ${Qt5Widgets_LIBRARIES} )
 ENDIF(MAC)
+
+IF(Qt5Xdg_FOUND)
+    SET (EXTRA_LIBS ${EXTRA_LIBS} Qt5Xdg )
+ENDIF(Qt5Xdg_FOUND)
+
 TARGET_LINK_LIBRARIES(cr3 crengine tinydict ${EXTRA_LIBS})
 
 IF (MAC)
diff --git a/cr3qt/src/mainwindow.cpp b/cr3qt/src/mainwindow.cpp
index 8cb2ade1a..64c062901 100644
--- a/cr3qt/src/mainwindow.cpp
+++ b/cr3qt/src/mainwindow.cpp
@@ -33,6 +33,10 @@
 #include <QtGui/QStyleFactory>
 #endif
 
+#if USE_QT5_XDG
+#include <XdgDirs>
+#endif
+
 #include <QClipboard>
 #include <QTranslator>
 #include <QLibraryInfo>
@@ -97,20 +101,49 @@ MainWindow::MainWindow(QWidget *parent)
     addAction(ui->actionNextSentence);
     addAction(ui->actionPrevSentence);
 
+
+#if _LINUX
+# ifdef USE_QT5_XDG
+    bool use_xdg_dir    = ! QDir(QDir::homePath() + "/.cr3").exists();
+    QString xdgCfgDir   = QDir::toNativeSeparators(XdgDirs::configHome() + "/cr3/");
+    QString xdgDataDir  = QDir::toNativeSeparators(XdgDirs::dataHome() + "/cr3/");
+    QString xdgCacheDir = QDir::toNativeSeparators(XdgDirs::cacheHome() + "/cr3/");
+# else
+    bool use_xdg_dir    = false;
+    QString xdgCfgDir   = "";
+    QString xdgDataDir  = "";
+    QString xdgCacheDir = "";
+# endif
+#endif
+
 #ifdef _LINUX
-    QString homeDir = QDir::toNativeSeparators(QDir::homePath() + "/.cr3/");
+    QString homeDir = use_xdg_dir ? xdgCfgDir : QDir::toNativeSeparators(QDir::homePath() + "/.cr3/");
 #else
     QString homeDir = QDir::toNativeSeparators(QDir::homePath() + "/cr3/");
 #endif
+
 #ifdef _LINUX
     QString exeDir = QString(CR3_DATA_DIR);
 #else
     QString exeDir = QDir::toNativeSeparators(qApp->applicationDirPath() + "/"); //QDir::separator();
 #endif
+
+
+#ifdef _LINUX
+    QString cacheDir = use_xdg_dir ? xdgCacheDir : (homeDir + "cache");
+    QString bookmarksDir = (use_xdg_dir? xdgDataDir:homeDir) + "bookmarks";
+#else
     QString cacheDir = homeDir + "cache";
     QString bookmarksDir = homeDir + "bookmarks";
+#endif
+
     QString histFile2 = exeDir + "cr3hist.bmk";
+#ifdef _LINUX
+    QString histFile = (use_xdg_dir? xdgDataDir:homeDir) + "cr3hist.bmk";
+#else
     QString histFile = homeDir + "cr3hist.bmk";
+#endif
+
     QString iniFile2 = exeDir + "cr3.ini";
     QString iniFile = homeDir + "cr3.ini";
     QString cssFile = homeDir + "fb2.css";
@@ -119,8 +152,12 @@ MainWindow::MainWindow(QWidget *parent)
     //CRLog::info("Translations directory: %s", LCSTR(qt2cr(translations)) );
     QString hyphDir = exeDir + "hyph" + QDir::separator();
     ui->view->setHyphDir(hyphDir);
-    ui->view->setHyphDir(homeDir + "hyph" + QDir::separator(), false);
 
+#ifdef _LINUX
+    ui->view->setHyphDir((use_xdg_dir?xdgDataDir:homeDir) + "hyph" + QDir::separator(), false);
+#else
+    ui->view->setHyphDir(homeDir + "hyph" + QDir::separator(), false);
+#endif
     ldomDocCache::init( qt2cr( cacheDir ), DOC_CACHE_SIZE );
     ui->view->setPropsChangeCallback( this );
     if (!ui->view->loadSettings( iniFile )) {