fix(deps): backport secure Wayland XML parser

third_party/wayland-scanner/src/protocol.rs

@@ -0,0 +1,154 @@
+use proc_macro2::TokenStream;
+use quote::quote;
+
+#[derive(Clone, Debug)]
+pub struct Protocol {
+    pub name: String,
+    pub copyright: Option<String>,
+    pub description: Option<(String, String)>,
+    pub interfaces: Vec<Interface>,
+}
+
+impl Protocol {
+    pub fn new(name: String) -> Protocol {
+        Protocol { name, copyright: None, description: None, interfaces: Vec::new() }
+    }
+}
+
+#[derive(Clone, Debug)]
+pub struct Interface {
+    pub name: String,
+    pub version: u32,
+    pub description: Option<(String, String)>,
+    pub requests: Vec<Message>,
+    pub events: Vec<Message>,
+    pub enums: Vec<Enum>,
+}
+
+impl Interface {
+    pub fn new() -> Interface {
+        Interface {
+            name: String::new(),
+            version: 1,
+            description: None,
+            requests: Vec::new(),
+            events: Vec::new(),
+            enums: Vec::new(),
+        }
+    }
+}
+
+#[derive(Clone, Debug)]
+pub struct Message {
+    pub name: String,
+    pub typ: Option<Type>,
+    pub since: u32,
+    pub description: Option<(String, String)>,
+    pub args: Vec<Arg>,
+}
+
+impl Message {
+    pub fn new() -> Message {
+        Message { name: String::new(), typ: None, since: 1, description: None, args: Vec::new() }
+    }
+
+    pub fn all_null(&self) -> bool {
+        self.args
+            .iter()
+            .all(|a| !((a.typ == Type::Object || a.typ == Type::NewId) && a.interface.is_some()))
+    }
+}
+
+#[derive(Clone, Debug)]
+pub struct Arg {
+    pub name: String,
+    pub typ: Type,
+    pub interface: Option<String>,
+    pub summary: Option<String>,
+    pub description: Option<(String, String)>,
+    pub allow_null: bool,
+    pub enum_: Option<String>,
+}
+
+impl Arg {
+    pub fn new() -> Arg {
+        Arg {
+            name: String::new(),
+            typ: Type::Object,
+            interface: None,
+            summary: None,
+            description: None,
+            allow_null: false,
+            enum_: None,
+        }
+    }
+}
+
+#[derive(Clone, Debug)]
+pub struct Enum {
+    pub name: String,
+    pub since: u16,
+    pub description: Option<(String, String)>,
+    pub entries: Vec<Entry>,
+    pub bitfield: bool,
+}
+
+impl Enum {
+    pub fn new() -> Enum {
+        Enum {
+            name: String::new(),
+            since: 1,
+            description: None,
+            entries: Vec::new(),
+            bitfield: false,
+        }
+    }
+}
+
+#[derive(Clone, Debug)]
+pub struct Entry {
+    pub name: String,
+    pub value: u32,
+    pub since: u16,
+    pub description: Option<(String, String)>,
+    pub summary: Option<String>,
+}
+
+impl Entry {
+    pub fn new() -> Entry {
+        Entry { name: String::new(), value: 0, since: 1, description: None, summary: None }
+    }
+}
+
+#[derive(Debug, PartialEq, Eq, Copy, Clone)]
+pub enum Type {
+    Int,
+    Uint,
+    Fixed,
+    String,
+    Object,
+    NewId,
+    Array,
+    Fd,
+    Destructor,
+}
+
+impl Type {
+    pub fn nullable(self) -> bool {
+        matches!(self, Type::String | Type::Object)
+    }
+
+    pub fn common_type(self) -> TokenStream {
+        match self {
+            Type::Int => quote!(Int),
+            Type::Uint => quote!(Uint),
+            Type::Fixed => quote!(Fixed),
+            Type::Array => quote!(Array),
+            Type::Fd => quote!(Fd),
+            Type::String => quote!(Str),
+            Type::Object => quote!(Object),
+            Type::NewId => quote!(NewId),
+            Type::Destructor => panic!("Destructor is not a valid argument type."),
+        }
+    }
+}