Desktop: Forward and Backward mouse button support (#3472)

forward and backward mouse button support

desktop/src/app.rs

@@ -1,17 +1,13 @@
 use rfd::AsyncFileDialog;
 use std::fs;
 use std::path::PathBuf;
-use std::sync::mpsc::Receiver;
-use std::sync::mpsc::Sender;
-use std::sync::mpsc::SyncSender;
+use std::sync::mpsc::{Receiver, Sender, SyncSender};
 use std::thread;
-use std::time::Duration;
-use std::time::Instant;
+use std::time::{Duration, Instant};
 use winit::application::ApplicationHandler;
 use winit::dpi::PhysicalSize;
-use winit::event::WindowEvent;
-use winit::event_loop::ActiveEventLoop;
-use winit::event_loop::ControlFlow;
+use winit::event::{ButtonSource, ElementState, MouseButton, WindowEvent};
+use winit::event_loop::{ActiveEventLoop, ControlFlow};
 use winit::window::WindowId;
 
 use crate::cef;
@@ -20,7 +16,7 @@ use crate::event::{AppEvent, AppEventScheduler};
 use crate::persist::PersistentData;
 use crate::render::{RenderError, RenderState};
 use crate::window::Window;
-use crate::wrapper::messages::{DesktopFrontendMessage, DesktopWrapperMessage, Platform};
+use crate::wrapper::messages::{DesktopFrontendMessage, DesktopWrapperMessage, InputMessage, MouseKeys, MouseState, Platform};
 use crate::wrapper::{DesktopWrapper, NodeGraphExecutionResult, WgpuContext, serialize_frontend_messages};
 
 pub(crate) struct App {
@@ -520,6 +516,32 @@ impl ApplicationHandler for App {
 					};
 				}
 			}
+
+			// Forward and Back buttons are not supported by CEF and thus need to be directly forwarded the editor
+			WindowEvent::PointerButton {
+				button: ButtonSource::Mouse(button),
+				state: ElementState::Pressed,
+				..
+			} => {
+				let mouse_keys = match button {
+					MouseButton::Back => Some(MouseKeys::BACK),
+					MouseButton::Forward => Some(MouseKeys::FORWARD),
+					_ => None,
+				};
+				if let Some(mouse_keys) = mouse_keys {
+					let message = DesktopWrapperMessage::Input(InputMessage::PointerDown {
+						editor_mouse_state: MouseState { mouse_keys, ..Default::default() },
+						modifier_keys: Default::default(),
+					});
+					self.app_event_scheduler.schedule(AppEvent::DesktopWrapperMessage(message));
+
+					let message = DesktopWrapperMessage::Input(InputMessage::PointerUp {
+						editor_mouse_state: Default::default(),
+						modifier_keys: Default::default(),
+					});
+					self.app_event_scheduler.schedule(AppEvent::DesktopWrapperMessage(message));
+				}
+			}
 			_ => {}
 		}
 

desktop/src/cef/input.rs

@@ -45,7 +45,7 @@ pub(crate) fn handle_window_event(browser: &Browser, input_state: &mut InputStat
 				MouseButton::Left => cef::MouseButtonType::from(cef_mouse_button_type_t::MBT_LEFT),
 				MouseButton::Right => cef::MouseButtonType::from(cef_mouse_button_type_t::MBT_RIGHT),
 				MouseButton::Middle => cef::MouseButtonType::from(cef_mouse_button_type_t::MBT_MIDDLE),
-				_ => return, //TODO: Handle Forward and Back button
+				_ => return,
 			};
 
 			let Some(host) = browser.host() else { return };

desktop/wrapper/src/handle_desktop_wrapper_message.rs

@@ -12,6 +12,9 @@ pub(super) fn handle_desktop_wrapper_message(dispatcher: &mut DesktopWrapperMess
 		DesktopWrapperMessage::FromWeb(message) => {
 			dispatcher.queue_editor_message(*message);
 		}
+		DesktopWrapperMessage::Input(message) => {
+			dispatcher.queue_editor_message(EditorMessage::InputPreprocessor(message));
+		}
 		DesktopWrapperMessage::OpenFileDialogResult { path, content, context } => match context {
 			OpenFileDialogContext::Document => {
 				dispatcher.queue_desktop_wrapper_message(DesktopWrapperMessage::OpenDocument { path, content });

desktop/wrapper/src/messages.rs

@@ -3,6 +3,10 @@ use std::path::PathBuf;
 
 pub(crate) use graphite_editor::messages::prelude::Message as EditorMessage;
 
+pub use graphite_editor::messages::input_mapper::utility_types::input_keyboard::{Key, ModifierKeys};
+pub use graphite_editor::messages::input_mapper::utility_types::input_mouse::{EditorMouseState as MouseState, EditorPosition as Position, MouseKeys};
+pub use graphite_editor::messages::prelude::InputPreprocessorMessage as InputMessage;
+
 pub use graphite_editor::messages::prelude::DocumentId;
 pub use graphite_editor::messages::prelude::PreferencesMessageHandler as Preferences;
 pub enum DesktopFrontendMessage {
@@ -69,6 +73,7 @@ pub enum DesktopFrontendMessage {
 
 pub enum DesktopWrapperMessage {
 	FromWeb(Box<EditorMessage>),
+	Input(InputMessage),
 	OpenFileDialogResult {
 		path: PathBuf,
 		content: Vec<u8>,