infer styles from prompts, and an option to control the behavior

modules/generation_parameters_copypaste.py

@@ -265,6 +265,14 @@ Steps: 20, Sampler: Euler a, CFG scale: 7, Seed: 965400086, Size: 512x512, Model
         else:
             prompt += ("" if prompt == "" else "\n") + line
 
+    if shared.opts.infotext_styles != "Ignore":
+        found_styles, prompt, negative_prompt = shared.prompt_styles.extract_styles_from_prompt(prompt, negative_prompt)
+
+        if shared.opts.infotext_styles == "Apply":
+            res["Styles array"] = found_styles
+        elif shared.opts.infotext_styles == "Apply if any" and found_styles:
+            res["Styles array"] = found_styles
+
     res["Prompt"] = prompt
     res["Negative prompt"] = negative_prompt
 

modules/shared.py

@@ -260,6 +260,10 @@ class OptionInfo:
         self.comment_after += f"<span class='info'>({info})</span>"
         return self
 
+    def html(self, html):
+        self.comment_after += html
+        return self
+
     def needs_restart(self):
         self.comment_after += " <span class='info'>(requires restart)</span>"
         return self
@@ -488,7 +492,14 @@ options_templates.update(options_section(('infotext', "Infotext"), {
     "add_model_hash_to_info": OptionInfo(True, "Add model hash to generation information"),
     "add_model_name_to_info": OptionInfo(True, "Add model name to generation information"),
     "add_version_to_infotext": OptionInfo(True, "Add program version to generation information"),
-    "disable_weights_auto_swap": OptionInfo(True, "When reading generation parameters from text into UI (from PNG info or pasted text), do not change the selected model/checkpoint."),
+    "disable_weights_auto_swap": OptionInfo(True, "Disregard checkpoint information from pasted infotext").info("when reading generation parameters from text into UI"),
+    "infotext_styles": OptionInfo("Apply if any", "Infer styles from prompts of pasted infotext", gr.Radio, {"choices": ["Ignore", "Apply", "Discard", "Apply if any"]}).info("when reading generation parameters from text into UI)").html("""<ul style='margin-left: 1.5em'>
+<li>Ignore: keep prompt and styles dropdown as it is.</li>
+<li>Apply: remove style text from prompt, always replace styles dropdown value with found styles (even if none are found).</li>
+<li>Discard: remove style text from prompt, keep styles dropdown as it is.</li>
+<li>Apply if any: remove style text from prompt; if any styles are found in prompt, put them into styles dropdown, otherwise keep it as it is.</li>
+</ul>"""),
+
 }))
 
 options_templates.update(options_section(('ui', "Live previews"), {

modules/styles.py

@@ -1,6 +1,7 @@
 import csv
 import os
 import os.path
+import re
 import typing
 import shutil
 
@@ -28,6 +29,44 @@ def apply_styles_to_prompt(prompt, styles):
     return prompt
 
 
+re_spaces = re.compile("  +")
+
+
+def extract_style_text_from_prompt(style_text, prompt):
+    stripped_prompt = re.sub(re_spaces, " ", prompt.strip())
+    stripped_style_text = re.sub(re_spaces, " ", style_text.strip())
+    if "{prompt}" in stripped_style_text:
+        left, right = stripped_style_text.split("{prompt}", 2)
+        if stripped_prompt.startswith(left) and stripped_prompt.endswith(right):
+            prompt = stripped_prompt[len(left):len(stripped_prompt)-len(right)]
+            return True, prompt
+    else:
+        if stripped_prompt.endswith(stripped_style_text):
+            prompt = stripped_prompt[:len(stripped_prompt)-len(stripped_style_text)]
+
+            if prompt.endswith(', '):
+                prompt = prompt[:-2]
+
+            return True, prompt
+
+    return False, prompt
+
+
+def extract_style_from_prompts(style: PromptStyle, prompt, negative_prompt):
+    if not style.prompt and not style.negative_prompt:
+        return False, prompt, negative_prompt
+
+    match_positive, extracted_positive = extract_style_text_from_prompt(style.prompt, prompt)
+    if not match_positive:
+        return False, prompt, negative_prompt
+
+    match_negative, extracted_negative = extract_style_text_from_prompt(style.negative_prompt, negative_prompt)
+    if not match_negative:
+        return False, prompt, negative_prompt
+
+    return True, extracted_positive, extracted_negative
+
+
 class StyleDatabase:
     def __init__(self, path: str):
         self.no_style = PromptStyle("None", "", "")
@@ -67,10 +106,34 @@ class StyleDatabase:
         if os.path.exists(path):
             shutil.copy(path, f"{path}.bak")
 
-        fd = os.open(path, os.O_RDWR|os.O_CREAT)
+        fd = os.open(path, os.O_RDWR | os.O_CREAT)
         with os.fdopen(fd, "w", encoding="utf-8-sig", newline='') as file:
             # _fields is actually part of the public API: typing.NamedTuple is a replacement for collections.NamedTuple,
             # and collections.NamedTuple has explicit documentation for accessing _fields. Same goes for _asdict()
             writer = csv.DictWriter(file, fieldnames=PromptStyle._fields)
             writer.writeheader()
-            writer.writerows(style._asdict() for k,     style in self.styles.items())
+            writer.writerows(style._asdict() for k, style in self.styles.items())
+
+    def extract_styles_from_prompt(self, prompt, negative_prompt):
+        extracted = []
+
+        applicable_styles = list(self.styles.values())
+
+        while True:
+            found_style = None
+
+            for style in applicable_styles:
+                is_match, new_prompt, new_neg_prompt = extract_style_from_prompts(style, prompt, negative_prompt)
+                if is_match:
+                    found_style = style
+                    prompt = new_prompt
+                    negative_prompt = new_neg_prompt
+                    break
+
+            if not found_style:
+                break
+
+            applicable_styles.remove(found_style)
+            extracted.append(found_style.name)
+
+        return list(reversed(extracted)), prompt, negative_prompt

modules/ui.py

@@ -621,6 +621,7 @@ def create_ui():
                 (subseed_strength, "Variation seed strength"),
                 (seed_resize_from_w, "Seed resize from-1"),
                 (seed_resize_from_h, "Seed resize from-2"),
+                (txt2img_prompt_styles, lambda d: d["Styles array"] if isinstance(d.get("Styles array"), list) else gr.update()),
                 (denoising_strength, "Denoising strength"),
                 (enable_hr, lambda d: "Denoising strength" in d),
                 (hr_options, lambda d: gr.Row.update(visible="Denoising strength" in d)),
@@ -1036,6 +1037,7 @@ def create_ui():
                 (subseed_strength, "Variation seed strength"),
                 (seed_resize_from_w, "Seed resize from-1"),
                 (seed_resize_from_h, "Seed resize from-2"),
+                (img2img_prompt_styles, lambda d: d["Styles array"] if isinstance(d.get("Styles array"), list) else gr.update()),
                 (denoising_strength, "Denoising strength"),
                 (mask_blur, "Mask blur"),
                 *modules.scripts.scripts_img2img.infotext_fields