core: button: add keyboard method to insert text

src/core/button.rs

@@ -111,6 +111,7 @@ pub trait Keyboard {
 
     fn press(&mut self, sym: Keysym);
     fn release(&mut self, sym: Keysym);
+    fn text(&mut self, text: &str);
     fn change_layout(&mut self, layout: &Layout);
 }
 

src/wayland/dispatcher.rs

@@ -61,8 +61,7 @@ impl Dispatcher {
         let vk_man = globals.bind(&queue, 1..=1, ())
                             .expect("Compositor must implement zwp_virtual_keyboard_manager_v1");
 
-        let im_man: zwp_input_method_manager_v2::ZwpInputMethodManagerV2
-                   = globals.bind(&queue, 1..=1, ())
+        let im_man = globals.bind(&queue, 1..=1, ())
                             .expect("Compositor must implement zwp_input_method_manager_v2");
 
         let frac_scale_man = match globals.bind(&queue, 1..=1, ()) {
@@ -75,8 +74,6 @@ impl Dispatcher {
             Err(_) => None,
         };
 
-        im_man.get_input_method(&seat, &queue, ());
-
         let disp = Surface::new(queue.clone(),
                                 &shm, compositor, layer_shell,
                                 frac_scale_man, vper, 185)?;
@@ -84,7 +81,7 @@ impl Dispatcher {
         let gfx = Mutex::new(gfx);
         let gfx = Arc::new(gfx);
 
-        let vk = VirtualKeyboard::new(&queue, &vk_man, &seat);
+        let vk = VirtualKeyboard::new(&queue, &vk_man, &im_man, &seat);
 
         let seat = Seat::new(layout, vk, gfx.clone(), queue.clone(), seat);
 

src/wayland/keyboard.rs

@@ -6,6 +6,8 @@
 use crate::core::Keyboard;
 use crate::core::Layout;
 use crate::core::Part;
+use crate::wayland::input_method_unstable_v2::zwp_input_method_manager_v2::ZwpInputMethodManagerV2;
+use crate::wayland::input_method_unstable_v2::zwp_input_method_v2::ZwpInputMethodV2;
 use crate::wayland::virtual_keyboard_unstable_v1::zwp_virtual_keyboard_manager_v1::ZwpVirtualKeyboardManagerV1;
 use crate::wayland::virtual_keyboard_unstable_v1::zwp_virtual_keyboard_v1::ZwpVirtualKeyboardV1;
 use std::collections::HashMap;
@@ -26,6 +28,7 @@ pub struct VirtualKeyboard {
     keymap: File,
     keymap_id: u8,
 
+    im: ZwpInputMethodV2,
     im_serial: u32,
 
     keycodes: HashMap<Keysym, u8>,
@@ -35,12 +38,15 @@ pub struct VirtualKeyboard {
 
 impl VirtualKeyboard {
     pub fn new<T: Dispatch<ZwpVirtualKeyboardV1, ()>
+                + Dispatch<ZwpInputMethodV2, ()>
                 + 'static>(queue: &QueueHandle<T>,
                                vk_man: &ZwpVirtualKeyboardManagerV1,
+                               im_man: &ZwpInputMethodManagerV2,
                                seat: &WlSeat)
                             -> VirtualKeyboard
     {
         let vk = vk_man.create_virtual_keyboard(seat, queue, ());
+        let im = im_man.get_input_method(&seat, &queue, ());
 
         let path = format!("/tmp/ufkbd-keymap-pid{}-1", process::id());
         let keymap = File::create(path).unwrap();
@@ -50,6 +56,7 @@ impl VirtualKeyboard {
             keymap,
             keymap_id: 1,
 
+            im,
             im_serial: 0,
 
             keycodes: HashMap::with_capacity(248),
@@ -151,6 +158,12 @@ impl Keyboard for VirtualKeyboard {
         self.vk.key(0, keycode as u32, 0);
     }
 
+    fn text(&mut self, text: &str)
+    {
+        self.im.commit_string(text.to_string());
+        self.im.commit(self.im_serial);
+    }
+
     fn change_layout(&mut self, layout: &Layout)
     {
         let mut keycode = 8;