Allow extensions to define custom CSS and JS

css/main.css

@@ -111,29 +111,3 @@ button {
 .small-button {
   max-width: 171px;
 }
-
-/* Align the elements for SD_api_picture extension */
-.SDAP #sampler_box {
-  padding-top: var(--spacing-sm);
-  padding-bottom: var(--spacing-sm);
-}
-
-.SDAP #seed_box,
-.SDAP #cfg_box {
-  padding-top: var(--spacing-md);
-}
-
-.SDAP #sampler_box span,
-.SDAP #seed_box span,
-.SDAP #cfg_box span{
-  margin-bottom: var(--spacing-sm);
-}
-
-.SDAP svg.dropdown-arrow {
-  flex-shrink: 0 !important;
-  margin: 0px !important;
-}
-
-.SDAP .hires_opts input[type="number"] {
-  width: 6em !important;
-}

docs/Extensions.md

@@ -1,16 +1,6 @@
-This web UI supports extensions. They are simply files under 
+Extensions are defined by files named `script.py` inside subfolders of `text-generation-webui/extensions`. They are invoked with the `--extensions` flag.
 
-```
-extensions/your_extension_name/script.py
-```
-
-which can be invoked with the 
-
-```
---extension your_extension_name
-```
-
-command-line flag.
+For instance, `extensions/silero_tts/script.py` gets invoked with `python server.py --extensions silero_tts`.
 
 ## [text-generation-webui-extensions](https://github.com/oobabooga/text-generation-webui-extensions)
 
@@ -44,6 +34,8 @@ Most of these have been created by the extremely talented contributors that you
 | Function        | Description |
 |-------------|-------------|
 | `def ui()` | Creates custom gradio elements when the UI is launched. | 
+| `def custom_css()` | Returns custom CSS as a string. |
+| `def custom_js()` | Returns custom javascript as a string. |
 | `def input_modifier(string)`  | Modifies the input string before it enters the model. In chat mode, it is applied to the user message. Otherwise, it is applied to the entire prompt. |
 | `def output_modifier(string)`  | Modifies the output string before it is presented in the UI. In chat mode, it is applied to the bot's reply. Otherwise, it is applied to the entire output. |
 | `def state_modifier(state)`  | Modifies the dictionary containing the input parameters before it is used by the text generation functions. |

extensions/sd_api_pictures/script.py

@@ -261,6 +261,11 @@ def SD_api_address_update(address):
     return gr.Textbox.update(label=msg)
 
 
+def custom_css():
+    path_to_css = Path(__file__).parent.resolve() / 'style.css'
+    return open(path_to_css, 'r').read()
+
+
 def ui():
 
     # Gradio elements

modules/extensions.py

@@ -119,6 +119,24 @@ def _apply_custom_generate_reply():
     return None
 
 
+def _apply_custom_css():
+    all_css = ''
+    for extension, _ in iterator():
+        if hasattr(extension, 'custom_css'):
+            all_css += getattr(extension, 'custom_css')()
+
+    return all_css
+
+
+def _apply_custom_js():
+    all_js = ''
+    for extension, _ in iterator():
+        if hasattr(extension, 'custom_js'):
+            all_js += getattr(extension, 'custom_js')()
+
+    return all_js
+
+
 EXTENSION_MAP = {
     "input": partial(_apply_string_extensions, "input_modifier"),
     "output": partial(_apply_string_extensions, "output_modifier"),
@@ -128,7 +146,9 @@ EXTENSION_MAP = {
     "input_hijack": _apply_input_hijack,
     "custom_generate_chat_prompt": _apply_custom_generate_chat_prompt,
     "custom_generate_reply": _apply_custom_generate_reply,
-    "tokenized_length": _apply_custom_tokenized_length
+    "tokenized_length": _apply_custom_tokenized_length,
+    "css": _apply_custom_css,
+    "js": _apply_custom_js
 }
 
 

server.py

@@ -45,6 +45,7 @@ from PIL import Image
 
 import modules.extensions as extensions_module
 from modules import chat, shared, training, ui, utils
+from modules.extensions import apply_extensions
 from modules.html_generator import chat_html_wrapper
 from modules.LoRA import add_lora_to_model
 from modules.models import load_model, load_soft_prompt, unload_model
@@ -519,7 +520,13 @@ def create_interface():
     if shared.args.extensions is not None and len(shared.args.extensions) > 0:
         extensions_module.load_extensions()
 
-    with gr.Blocks(css=ui.css if not shared.is_chat() else ui.css + ui.chat_css, analytics_enabled=False, title=title, theme=ui.theme) as shared.gradio['interface']:
+    # css/js strings
+    css = ui.css if not shared.is_chat() else ui.css + ui.chat_css
+    js = ui.main_js if not shared.is_chat() else ui.main_js + ui.chat_js
+    css += apply_extensions('css')
+    js += apply_extensions('js')
+
+    with gr.Blocks(css=css, analytics_enabled=False, title=title, theme=ui.theme) as shared.gradio['interface']:
 
         # Create chat mode interface
         if shared.is_chat():
@@ -826,8 +833,6 @@ def create_interface():
                 chat.upload_your_profile_picture, shared.gradio['your_picture'], None).then(
                 partial(chat.redraw_html, reset_cache=True), shared.reload_inputs, shared.gradio['display'])
 
-            shared.gradio['interface'].load(None, None, None, _js=f"() => {{{ui.main_js+ui.chat_js}}}")
-
         # notebook/default modes event handlers
         else:
             shared.input_params = [shared.gradio[k] for k in ['textbox', 'interface_state']]
@@ -869,8 +874,8 @@ def create_interface():
             shared.gradio['prompt_menu'].change(load_prompt, shared.gradio['prompt_menu'], shared.gradio['textbox'], show_progress=False)
             shared.gradio['save_prompt'].click(save_prompt, shared.gradio['textbox'], shared.gradio['status'], show_progress=False)
             shared.gradio['count_tokens'].click(count_tokens, shared.gradio['textbox'], shared.gradio['status'], show_progress=False)
-            shared.gradio['interface'].load(None, None, None, _js=f"() => {{{ui.main_js}}}")
 
+        shared.gradio['interface'].load(None, None, None, _js=f"() => {{{js}}}")
         shared.gradio['interface'].load(partial(ui.apply_interface_values, {}, use_persistent=True), None, [shared.gradio[k] for k in ui.list_interface_input_elements(chat=shared.is_chat())], show_progress=False)
         # Extensions block
         if shared.args.extensions is not None: