From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Fri, 19 Apr 2024 02:47:55 +0200
Subject: Adding upstream version 124.0.1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../python/templates/CallbackInterfaceTemplate.py  | 105 +++++++++++++++++++++
 1 file changed, 105 insertions(+)
 create mode 100644 third_party/rust/uniffi_bindgen/src/bindings/python/templates/CallbackInterfaceTemplate.py

(limited to 'third_party/rust/uniffi_bindgen/src/bindings/python/templates/CallbackInterfaceTemplate.py')

diff --git a/third_party/rust/uniffi_bindgen/src/bindings/python/templates/CallbackInterfaceTemplate.py b/third_party/rust/uniffi_bindgen/src/bindings/python/templates/CallbackInterfaceTemplate.py
new file mode 100644
index 0000000000..e0e926757a
--- /dev/null
+++ b/third_party/rust/uniffi_bindgen/src/bindings/python/templates/CallbackInterfaceTemplate.py
@@ -0,0 +1,105 @@
+{%- let cbi = ci|get_callback_interface_definition(id) %}
+{%- let foreign_callback = format!("foreignCallback{}", canonical_type_name) %}
+
+{% if self.include_once_check("CallbackInterfaceRuntime.py") %}{% include "CallbackInterfaceRuntime.py" %}{% endif %}
+
+# Declaration and _UniffiConverters for {{ type_name }} Callback Interface
+
+class {{ type_name }}:
+    {% for meth in cbi.methods() -%}
+    def {{ meth.name()|fn_name }}(self, {% call py::arg_list_decl(meth) %}):
+        raise NotImplementedError
+
+    {% endfor %}
+
+def py_{{ foreign_callback }}(handle, method, args_data, args_len, buf_ptr):
+    {% for meth in cbi.methods() -%}
+    {% let method_name = format!("invoke_{}", meth.name())|fn_name %}
+    def {{ method_name }}(python_callback, args_stream, buf_ptr):
+        {#- Unpacking args from the _UniffiRustBuffer #}
+        def makeCall():
+            {#- Calling the concrete callback object #}
+            {%- if meth.arguments().len() != 0 -%}
+            return python_callback.{{ meth.name()|fn_name }}(
+                {% for arg in meth.arguments() -%}
+                {{ arg|read_fn }}(args_stream)
+                {%- if !loop.last %}, {% endif %}
+                {% endfor -%}
+            )
+            {%- else %}
+            return python_callback.{{ meth.name()|fn_name }}()
+            {%- endif %}
+
+        def makeCallAndHandleReturn():
+            {%- match meth.return_type() %}
+            {%- when Some(return_type) %}
+            rval = makeCall()
+            with _UniffiRustBuffer.alloc_with_builder() as builder:
+                {{ return_type|write_fn }}(rval, builder)
+                buf_ptr[0] = builder.finalize()
+            {%- when None %}
+            makeCall()
+            {%- endmatch %}
+            return _UNIFFI_CALLBACK_SUCCESS
+
+        {%- match meth.throws_type() %}
+        {%- when None %}
+        return makeCallAndHandleReturn()
+        {%- when Some(err) %}
+        try:
+            return makeCallAndHandleReturn()
+        except {{ err|type_name }} as e:
+            # Catch errors declared in the UDL file
+            with _UniffiRustBuffer.alloc_with_builder() as builder:
+                {{ err|write_fn }}(e, builder)
+                buf_ptr[0] = builder.finalize()
+            return _UNIFFI_CALLBACK_ERROR
+        {%- endmatch %}
+
+    {% endfor %}
+
+    cb = {{ ffi_converter_name }}.lift(handle)
+    if not cb:
+        raise InternalError("No callback in handlemap; this is a uniffi bug")
+
+    if method == IDX_CALLBACK_FREE:
+        {{ ffi_converter_name }}.drop(handle)
+        # Successfull return
+        # See docs of ForeignCallback in `uniffi_core/src/ffi/foreigncallbacks.rs`
+        return _UNIFFI_CALLBACK_SUCCESS
+
+    {% for meth in cbi.methods() -%}
+    {% let method_name = format!("invoke_{}", meth.name())|fn_name -%}
+    if method == {{ loop.index }}:
+        # Call the method and handle any errors
+        # See docs of ForeignCallback in `uniffi_core/src/ffi/foreigncallbacks.rs` for details
+        try:
+            return {{ method_name }}(cb, _UniffiRustBufferStream(args_data, args_len), buf_ptr)
+        except BaseException as e:
+            # Catch unexpected errors
+            try:
+                # Try to serialize the exception into a String
+                buf_ptr[0] = {{ Type::String.borrow()|lower_fn }}(repr(e))
+            except:
+                # If that fails, just give up
+                pass
+            return _UNIFFI_CALLBACK_UNEXPECTED_ERROR
+    {% endfor %}
+
+    # This should never happen, because an out of bounds method index won't
+    # ever be used. Once we can catch errors, we should return an InternalException.
+    # https://github.com/mozilla/uniffi-rs/issues/351
+
+    # An unexpected error happened.
+    # See docs of ForeignCallback in `uniffi_core/src/ffi/foreigncallbacks.rs`
+    return _UNIFFI_CALLBACK_UNEXPECTED_ERROR
+
+# We need to keep this function reference alive:
+# if they get GC'd while in use then UniFFI internals could attempt to call a function
+# that is in freed memory.
+# That would be...uh...bad. Yeah, that's the word. Bad.
+{{ foreign_callback }} = _UNIFFI_FOREIGN_CALLBACK_T(py_{{ foreign_callback }})
+_rust_call(lambda err: _UniffiLib.{{ cbi.ffi_init_callback().name() }}({{ foreign_callback }}, err))
+
+# The _UniffiConverter which transforms the Callbacks in to Handles to pass to Rust.
+{{ ffi_converter_name }} = _UniffiConverterCallbackInterface({{ foreign_callback }})
-- 
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