Wallpaper (macOS): add support

Author: CarterLi

CMakeLists.txt

@@ -57,7 +57,7 @@ cmake_dependent_option(ENABLE_GIO "Enable gio-2.0" ON "LINUX OR BSD" OFF)
 cmake_dependent_option(ENABLE_DCONF "Enable dconf" ON "LINUX OR BSD" OFF)
 cmake_dependent_option(ENABLE_DBUS "Enable dbus-1" ON "LINUX OR BSD" OFF)
 cmake_dependent_option(ENABLE_XFCONF "Enable libxfconf-0" ON "LINUX OR BSD" OFF)
-cmake_dependent_option(ENABLE_SQLITE3 "Enable sqlite3" ON "LINUX OR BSD" OFF)
+cmake_dependent_option(ENABLE_SQLITE3 "Enable sqlite3" ON "LINUX OR BSD OR APPLE" OFF)
 cmake_dependent_option(ENABLE_RPM "Enable rpm" ON "LINUX" OFF)
 cmake_dependent_option(ENABLE_IMAGEMAGICK7 "Enable imagemagick 7" ON "LINUX OR BSD OR APPLE OR WIN32" OFF)
 cmake_dependent_option(ENABLE_IMAGEMAGICK6 "Enable imagemagick 6" ON "LINUX OR BSD OR APPLE" OFF)
@@ -494,7 +494,7 @@ elseif(APPLE)
         src/detection/terminalshell/terminalshell_linux.c
         src/detection/uptime/uptime_bsd.c
         src/detection/users/users_linux.c
-        src/detection/wallpaper/wallpaper_nosupport.c
+        src/detection/wallpaper/wallpaper_apple.c
         src/detection/wifi/wifi_apple.m
         src/detection/wmtheme/wmtheme_apple.m
         src/util/apple/cf_helpers.c

README.md

@@ -64,6 +64,7 @@ The following libraries are used if present at runtime:
 * [`MoltenVK`](https://github.com/KhronosGroup/MoltenVK): Vulkan driver for macOS. [`molten-vk`](https://github.com/Homebrew/homebrew-core/blob/HEAD/Formula/molten-vk.rb)
 * [`libmagickcore` (ImageMagick)](https://www.imagemagick.org/): Images in terminal using sixel graphics protocol. [`imagemagick`](https://github.com/Homebrew/homebrew-core/blob/HEAD/Formula/imagemagick.rb)
 * [`libchafa`](https://github.com/hpjansson/chafa): Image output as ascii art. [`chafa`](https://github.com/Homebrew/homebrew-core/blob/HEAD/Formula/chafa.rb)
+* [`libsqlite3`](https://www.sqlite.org/index.html): Used for fast wallpaper detection ( fallback to AppleScript )
 
 For the image logo, iTerm with iterm image protocol should work. Apple Terminal is not supported.
 

src/common/settings.c

@@ -297,6 +297,7 @@ typedef struct SQLiteData
     FF_LIBRARY_SYMBOL(sqlite3_step)
     FF_LIBRARY_SYMBOL(sqlite3_data_count)
     FF_LIBRARY_SYMBOL(sqlite3_column_int)
+    FF_LIBRARY_SYMBOL(sqlite3_column_text)
     FF_LIBRARY_SYMBOL(sqlite3_finalize)
     FF_LIBRARY_SYMBOL(sqlite3_close)
 } SQLiteData;
@@ -310,6 +311,7 @@ static const SQLiteData* getSQLiteData(const FFinstance* instance)
     FF_LIBRARY_DATA_LOAD_SYMBOL(sqlite3_step)
     FF_LIBRARY_DATA_LOAD_SYMBOL(sqlite3_data_count)
     FF_LIBRARY_DATA_LOAD_SYMBOL(sqlite3_column_int)
+    FF_LIBRARY_DATA_LOAD_SYMBOL(sqlite3_column_text)
     FF_LIBRARY_DATA_LOAD_SYMBOL(sqlite3_finalize)
     FF_LIBRARY_DATA_LOAD_SYMBOL(sqlite3_close)
 
@@ -350,12 +352,52 @@ int ffSettingsGetSQLite3Int(const FFinstance* instance, const char* dbPath, cons
 
     return result;
 }
+
+bool ffSettingsGetSQLite3String(const FFinstance* instance, const char* dbPath, const char* query, FFstrbuf* result)
+{
+    if(!ffPathExists(dbPath, FF_PATHTYPE_FILE))
+        return false;
+
+    const SQLiteData* data = getSQLiteData(instance);
+    if(data == NULL)
+        return false;
+
+    sqlite3* db;
+    if(data->ffsqlite3_open_v2(dbPath, &db, SQLITE_OPEN_READONLY, NULL) != SQLITE_OK)
+        return false;
+
+    sqlite3_stmt* stmt;
+    if(data->ffsqlite3_prepare_v2(db, query, (int) strlen(query), &stmt, NULL) != SQLITE_OK)
+    {
+        data->ffsqlite3_close(db);
+        return false;
+    }
+
+    if(data->ffsqlite3_step(stmt) != SQLITE_ROW || data->ffsqlite3_data_count(stmt) < 1)
+    {
+        data->ffsqlite3_finalize(stmt);
+        data->ffsqlite3_close(db);
+        return false;
+    }
+
+    ffStrbufSetS(result, (const char *) data->ffsqlite3_column_text(stmt, 0));
+
+    data->ffsqlite3_finalize(stmt);
+    data->ffsqlite3_close(db);
+
+    return true;
+}
 #else //FF_HAVE_SQLITE3
 int ffSettingsGetSQLite3Int(const FFinstance* instance, const char* dbPath, const char* query)
 {
     FF_UNUSED(instance, dbPath, query)
     return 0;
 }
+bool ffSettingsGetSQLite3String(const FFinstance* instance, const char* dbPath, const char* query, FFstrbuf* result)
+{
+    FF_UNUSED(instance, dbPath, query, result)
+    return false;
+}
 #endif //FF_HAVE_SQLITE3
 
 #ifdef __ANDROID__

src/common/settings.h

@@ -31,6 +31,7 @@ FFvariant ffSettingsGet(const FFinstance* instance, const char* dconfKey, const
 FFvariant ffSettingsGetXFConf(const FFinstance* instance, const char* channelName, const char* propertyName, FFvarianttype type);
 
 int ffSettingsGetSQLite3Int(const FFinstance* instance, const char* dbPath, const char* query);
+bool ffSettingsGetSQLite3String(const FFinstance* instance, const char* dbPath, const char* query, FFstrbuf* result);
 
 #ifdef __ANDROID__
 void ffSettingsGetAndroidProperty(const char* propName, FFstrbuf* result);

src/detection/wallpaper/wallpaper_apple.c

@@ -0,0 +1,31 @@
+#include "wallpaper.h"
+#include "common/settings.h"
+#include "util/apple/osascript.h"
+
+const char* ffDetectWallpaper(FF_MAYBE_UNUSED const FFinstance* instance, FFstrbuf* result)
+{
+    // https://stackoverflow.com/questions/301215/getting-desktop-background-on-mac
+
+    #ifdef FF_HAVE_SQLITE3
+
+    FF_STRBUF_AUTO_DESTROY path;
+    ffStrbufInitCopy(&path, &instance->state.platform.homeDir);
+    ffStrbufAppendS(&path, "Library/Application Support/Dock/desktoppicture.db");
+    if (ffSettingsGetSQLite3String(instance, path.chars,
+        "SELECT value\n"
+        "FROM preferences\n"
+        "JOIN data ON preferences.data_id=data.ROWID\n"
+        "JOIN pictures ON preferences.picture_id=pictures.ROWID\n"
+        "JOIN displays ON pictures.display_id=displays.ROWID\n"
+        "JOIN spaces ON pictures.space_id=spaces.ROWID\n"
+        "WHERE display_id=1 AND space_id=1 AND key=1", result)
+    )
+        return NULL;
+
+    #endif
+
+    if (!ffOsascript("tell application \"Finder\" to get POSIX path of (get desktop picture as alias)", result))
+        return "ffOsascript() failed";
+
+    return NULL;
+}