major refactoring of modules

Signed-off-by: Vladimir Mandic <mandic00@live.com>

scripts/layerdiffuse_ext.py

@@ -0,0 +1,56 @@
+import gradio as gr
+from modules import shared, scripts_manager, sd_models
+
+
+class Script(scripts_manager.Script):
+
+    def title(self):
+        return 'LayerDiffuse: Transparent Image'
+
+    def show(self, is_img2img):
+        return True if shared.native else False
+
+    def apply(self):
+        from scripts import layerdiffuse
+        if not shared.sd_loaded:
+            shared.log.error('LayerDiffuse: model not loaded')
+            return self.is_active()
+        if shared.sd_model_type != 'sd' and shared.sd_model_type != 'sdxl':
+            shared.log.error(f'LayerDiffuse: incorrect base model: class={shared.sd_model.__class__.__name__} type={shared.sd_model_type}')
+            return self.is_active()
+        if hasattr(shared.sd_model, 'layerdiffusion'):
+            shared.log.warning('LayerDiffuse: already applied')
+            return self.is_active()
+        layerdiffuse.apply_layerdiffuse()
+        return self.is_active()
+
+    def reload(self):
+        sd_models.reload_model_weights(force=True)
+        return self.is_active()
+
+    def is_active(self):
+        if not shared.sd_loaded:
+            return '<div style="color: darkred">LayerDiffuse: model not loaded</div><br>'
+        if shared.sd_model_type != 'sd' and shared.sd_model_type != 'sdxl':
+            return '<div style="color: darkred">LayerDiffuse: incorrect base model</div><br>'
+        if hasattr(shared.sd_model, 'layerdiffusion'):
+            return '<div style="color: darkgreen">LayerDiffuse: active</div><br>'
+        return '<div style="color: darkgray">LayerDiffuse: inactive</div><br>'
+
+    def ui(self, _is_img2img):
+        with gr.Row():
+            gr.HTML("""
+                    <a href="https://github.com/rootonchair/diffuser_layerdiffuse">&nbsp LayerDiffuse: Transparent Image</a><br><br>
+                    <div>- Click Apply to model to apply LayerDiffuse to current model</div>
+                    <div>- Click Reload model to remove LayerDiffuse from current model</div><br>
+                    """)
+        with gr.Row():
+            active = gr.HTML('')
+        with gr.Row():
+            check_btn = gr.Button('Check status', variant='primary')
+            apply_btn = gr.Button('Apply to model', variant='primary')
+            reload_btn = gr.Button('Reload model', variant='primary')
+            check_btn.click(fn=self.is_active, inputs=[], outputs=[active])
+            apply_btn.click(fn=self.apply, inputs=[], outputs=[active])
+            reload_btn.click(fn=self.reload, inputs=[], outputs=[active])
+        return []