Desktop: Move wrapper to separate crate (#3073)

Move desktop wrapper to separate crate

desktop/wrapper/src/messages.rs

@@ -0,0 +1,60 @@
+use std::path::PathBuf;
+
+use graphite_editor::messages::prelude::{DocumentId, FrontendMessage};
+
+pub(crate) use graphite_editor::messages::prelude::Message as EditorMessage;
+
+pub enum DesktopFrontendMessage {
+	ToWeb(Vec<FrontendMessage>),
+	OpenFileDialog {
+		title: String,
+		filters: Vec<FileFilter>,
+		context: OpenFileDialogContext,
+	},
+	SaveFileDialog {
+		title: String,
+		default_filename: String,
+		default_folder: Option<PathBuf>,
+		filters: Vec<FileFilter>,
+		context: SaveFileDialogContext,
+	},
+	WriteFile {
+		path: PathBuf,
+		content: Vec<u8>,
+	},
+	OpenUrl(String),
+	UpdateViewportBounds {
+		x: f32,
+		y: f32,
+		width: f32,
+		height: f32,
+	},
+	UpdateOverlays(vello::Scene),
+}
+
+pub struct FileFilter {
+	pub name: String,
+	pub extensions: Vec<String>,
+}
+
+pub enum DesktopWrapperMessage {
+	FromWeb(Box<EditorMessage>),
+	OpenFileDialogResult { path: PathBuf, content: Vec<u8>, context: OpenFileDialogContext },
+	SaveFileDialogResult { path: PathBuf, context: SaveFileDialogContext },
+	OpenDocument { path: PathBuf, content: Vec<u8> },
+	OpenFile { path: PathBuf, content: Vec<u8> },
+	ImportFile { path: PathBuf, content: Vec<u8> },
+	ImportSvg { path: PathBuf, content: Vec<u8> },
+	ImportImage { path: PathBuf, content: Vec<u8> },
+	PollNodeGraphEvaluation,
+}
+
+pub enum OpenFileDialogContext {
+	Document,
+	Import,
+}
+
+pub enum SaveFileDialogContext {
+	Document { document_id: DocumentId, content: Vec<u8> },
+	File { content: Vec<u8> },
+}