Font: don't depend on displayserver detection on Windows and macOS.

Author: CarterLi

src/detection/font/font_linux.c

@@ -1,9 +1,18 @@
 #include "common/font.h"
+#include "detection/displayserver/displayserver.h"
 #include "detection/gtk_qt/gtk_qt.h"
 #include "font.h"
 
 void ffDetectFontImpl(const FFinstance* instance, FFFontResult* result)
 {
+    const FFDisplayServerResult* wmde = ffConnectDisplayServer(instance);
+
+    if(ffStrbufIgnCaseCompS(&wmde->wmProtocolName, FF_WM_PROTOCOL_TTY) == 0)
+    {
+        ffStrbufAppendS(&result->error, "Font isn't supported in TTY");
+        return;
+    }
+
     FFfont qt;
     ffFontInitQt(&qt, ffDetectQt(instance)->font.chars);
     ffStrbufAppend(&result->fonts[0], &qt.pretty);

src/modules/font.c

@@ -75,14 +75,6 @@ void ffPrintFont(FFinstance* instance)
 {
     assert(FF_DETECT_FONT_NUM_FONTS == FF_FONT_NUM_FORMAT_ARGS);
 
-    const FFDisplayServerResult* wmde = ffConnectDisplayServer(instance);
-
-    if(ffStrbufIgnCaseCompS(&wmde->wmProtocolName, FF_WM_PROTOCOL_TTY) == 0)
-    {
-        ffPrintError(instance, FF_FONT_MODULE_NAME, 0, &instance->config.font, "Font isn't supported in TTY");
-        return;
-    }
-
     const FFFontResult* font = ffDetectFont(instance);
 
     if(font->error.length > 0)