Improve dynamic placeholder implementation

• Rename fields/methods for clarity:
  • dynamic_placeholder_button_hidden -> hide_placeholder_button
  • _compute_dynamic_placeholder_button_hidden -> _compute_hide_placeholder_button
• Restructure JS components:
  • Replace dynamic_placeholder_charfield_patch with new component-based implementation
  • Add proper prop handling and converter type awareness
• Add onchange handler to clear value when converter changes
• Refactor placeholder computation using dictionary mapping
• Update XML views with new field names and component parameters
• Improve mimetype.py documentation and default handling

models/redner_substitution.py

@@ -83,7 +83,7 @@
 
     value_placeholder = fields.Char(compute="_compute_value_placeholder")
 
-    dynamic_placeholder_button_hidden = fields.Boolean(
-        compute="_compute_dynamic_placeholder_button_hidden"
+    hide_placeholder_button = fields.Boolean(
+        compute="_compute_hide_placeholder_button", string="Hide Placeholder Button"
     )
 
@@ -88,4 +88,9 @@
     )
 
+    @api.onchange("converter")
+    def _onchange_converter(self):
+        if self.converter:
+            self.value = False
+
     @api.depends("converter")
     def _compute_value_placeholder(self):
@@ -90,25 +95,18 @@
     @api.depends("converter")
     def _compute_value_placeholder(self):
-        """Computes a dynamic placeholder that depends on the selected type
-        to help the user inputs their data.
-        """
-        for subsitution in self:
-            placeholder = _("N/A")
-            if subsitution.converter == FIELD:
-                placeholder = _("e.g: name or partner_id.name")
-            elif subsitution.converter == MAIL_TEMPLATE:
-                placeholder = _("e.g: {{object.partner_id.name}}")
-            elif subsitution.converter == MAIL_TEMPLATE_DESERIALIZE:
-                placeholder = _("e.g: {{ object.get_partner_info() | safe }}")
-            elif subsitution.converter == RELATION_2MANY:
-                placeholder = _("e.g: tax_ids")
-            elif subsitution.converter == RELATION_PATH:
-                placeholder = _(
-                    "e.g: partner_id/category_id/name ou partner_id/child_ids[]"
-                )
-            elif subsitution.converter == CONSTANT:
-                placeholder = _("e.g: www.orbeet.io")
-            subsitution.value_placeholder = placeholder
+        """Compute placeholder text based on conversion type"""
+        placeholder_map = {
+            FIELD: _("e.g: name or partner_id.name"),
+            MAIL_TEMPLATE: _("e.g: {{object.partner_id.name}}"),
+            MAIL_TEMPLATE_DESERIALIZE: _("e.g: {{ object.get_partner_info() | safe }}"),
+            RELATION_PATH: _(
+                "e.g: partner_id/category_id/name ou partner_id/child_ids[]"
+            ),
+            RELATION_2MANY: _("e.g: tax_ids"),
+            CONSTANT: _("e.g: www.orbeet.io"),
+        }
+        for record in self:
+            record.value_placeholder = placeholder_map.get(record.converter, _("N/A"))
 
     @api.depends("value")
     def _compute_render_model(self):
@@ -126,5 +124,5 @@
             record.depth = record.keyword.count(".")
 
     @api.depends("converter")
-    def _compute_dynamic_placeholder_button_hidden(self):
+    def _compute_hide_placeholder_button(self):
         for record in self:
@@ -130,5 +128,5 @@
         for record in self:
-            record.dynamic_placeholder_button_hidden = (
+            record.hide_placeholder_button = (
                 record.converter not in DYNAMIC_PLACEHOLDER_ALLOWED_CONVERTERS
             )