Fooocus Prompt Expansion (#329)

* add vae approx download

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modules/sdxl_styles.py

@@ -959,6 +959,14 @@ SD_XL_BASE_RATIOS = {
 aspect_ratios = {str(v[0]) + '×' + str(v[1]): v for k, v in SD_XL_BASE_RATIOS.items()}
 
 
-def apply_style(style, positive, negative):
+def apply_style_positive(style, txt):
     p, n = styles.get(style, default_style)
-    return p.replace('{prompt}', positive), n + ', ' + negative
+    return p.replace('{prompt}', txt)
+
+
+def apply_style_negative(style, txt):
+    p, n = styles.get(style, default_style)
+    if n == '':
+        return txt
+    else:
+        return n + ', ' + txt