exo: Implement support for zwp_stylus_v1 protocol

components/exo/wayland/server.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/exo/wayland/server.h"
 
 #include <grp.h>
 #include <linux/input.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <viewporter-server-protocol.h>
 #include <wayland-server-core.h>
 #include <wayland-server-protocol-core.h>
 
 // Note: core wayland headers need to be included before protocol headers.
 #include <alpha-compositing-unstable-v1-server-protocol.h>  // NOLINT
 #include <gaming-input-unstable-v1-server-protocol.h>       // NOLINT
 #include <remote-shell-unstable-v1-server-protocol.h>       // NOLINT
 #include <secure-output-unstable-v1-server-protocol.h>      // NOLINT
+#include <stylus-unstable-v1-server-protocol.h>             // NOLINT
 #include <xdg-shell-unstable-v5-server-protocol.h>          // NOLINT
 #include <vsync-feedback-unstable-v1-server-protocol.h>     // NOLINT
 
 #include <algorithm>
 #include <cstdlib>
 #include <iterator>
 #include <string>
 #include <utility>
 
 #include "ash/common/display/display_info.h"
@@ skipping 16 matching lines @@
 #include "components/exo/buffer.h"
 #include "components/exo/display.h"
 #include "components/exo/gamepad.h"
 #include "components/exo/gamepad_delegate.h"
 #include "components/exo/keyboard.h"
 #include "components/exo/keyboard_delegate.h"
 #include "components/exo/notification_surface.h"
 #include "components/exo/notification_surface_manager.h"
 #include "components/exo/pointer.h"
 #include "components/exo/pointer_delegate.h"
+#include "components/exo/pointer_stylus_delegate.h"
 #include "components/exo/shared_memory.h"
 #include "components/exo/shell_surface.h"
 #include "components/exo/sub_surface.h"
 #include "components/exo/surface.h"
 #include "components/exo/surface_property.h"
 #include "components/exo/touch.h"
 #include "components/exo/touch_delegate.h"
 #include "ipc/unix_domain_socket_util.h"
 #include "third_party/skia/include/core/SkRegion.h"
 #include "ui/aura/window_property.h"
@@ skipping 2819 matching lines @@
 
   std::unique_ptr<base::Thread> gaming_input_thread(
       new base::Thread("Exo gaming input polling thread."));
   gaming_input_thread->StartWithOptions(
       base::Thread::Options(base::MessageLoop::TYPE_IO, 0));
 
   SetImplementation(resource, &gaming_input_implementation,
                     std::move(gaming_input_thread));
 }
 
+////////////////////////////////////////////////////////////////////////////////
+// pointer_stylus interface:
+
+class WaylandPointerStylusDelegate : public PointerStylusDelegate {
+ public:
+  WaylandPointerStylusDelegate(wl_resource* resource, Pointer* pointer)
+      : resource_(resource), pointer_(pointer) {
+    pointer_->SetStylusDelegate(this);
+  }
+  ~WaylandPointerStylusDelegate() override {
+    if (pointer_ != nullptr)
+      pointer_->SetStylusDelegate(nullptr);
+  }
+  void OnPointerDestroying(Pointer* pointer) override { pointer_ = nullptr; }
+  void OnPointerToolChange(ui::EventPointerType type) override {
+    uint wayland_type = ZWP_POINTER_STYLUS_V1_TOOL_TYPE_MOUSE;
+    if (type == ui::EventPointerType::POINTER_TYPE_PEN)
+      wayland_type = ZWP_POINTER_STYLUS_V1_TOOL_TYPE_PEN;
+    zwp_pointer_stylus_v1_send_tool_change(resource_, wayland_type);
+  }
+  void OnPointerForce(base::TimeTicks time_stamp, float force) override {
+    zwp_pointer_stylus_v1_send_force(resource_,
+                                     TimeTicksToMilliseconds(time_stamp),
+                                     wl_fixed_from_double(force));
+  }
+  void OnPointerTilt(base::TimeTicks time_stamp, gfx::Vector2dF tilt) override {
+    zwp_pointer_stylus_v1_send_tilt(
+        resource_, TimeTicksToMilliseconds(time_stamp),
+        wl_fixed_from_double(tilt.x()), wl_fixed_from_double(tilt.y()));
+  }
+
+ private:
+  wl_resource* resource_;
+  Pointer* pointer_;
+
+  // The client who own this pointer stylus instance.
+  wl_client* client() const { return wl_resource_get_client(resource_); }
+
+  DISALLOW_COPY_AND_ASSIGN(WaylandPointerStylusDelegate);
+};
+
+void pointer_stylus_destroy(wl_client* client, wl_resource* resource) {
+  wl_resource_destroy(resource);
+}
+
+const struct zwp_pointer_stylus_v1_interface pointer_stylus_implementation = {
+    pointer_stylus_destroy};
+
+////////////////////////////////////////////////////////////////////////////////
+// stylus interface:
+
+void stylus_get_pointer_stylus(wl_client* client,
+                               wl_resource* resource,
+                               uint32_t id,
+                               wl_resource* pointer_resource) {
+  Pointer* pointer = GetUserDataAs<Pointer>(pointer_resource);
+
+  wl_resource* stylus_resource =
+      wl_resource_create(client, &zwp_pointer_stylus_v1_interface, 1, id);
+
+  SetImplementation(stylus_resource, &pointer_stylus_implementation,
+                    base::WrapUnique(new WaylandPointerStylusDelegate(
+                        stylus_resource, pointer)));
+}
+
+const struct zwp_stylus_v1_interface stylus_implementation = {
+    stylus_get_pointer_stylus};
+
+void bind_stylus(wl_client* client, void* data, uint32_t version, uint32_t id) {
+  wl_resource* resource =
+      wl_resource_create(client, &zwp_stylus_v1_interface, version, id);
+  wl_resource_set_implementation(resource, &stylus_implementation, data,
+                                 nullptr);
+}
+
 }  // namespace
 
 ////////////////////////////////////////////////////////////////////////////////
 // Server, public:
 
 Server::Server(Display* display)
     : display_(display), wl_display_(wl_display_create()) {
   wl_global_create(wl_display_.get(), &wl_compositor_interface,
                    compositor_version, display_, bind_compositor);
   wl_global_create(wl_display_.get(), &wl_shm_interface, 1, display_, bind_shm);
@@ skipping 20 matching lines @@
   wl_global_create(wl_display_.get(), &wp_viewporter_interface, 1, display_,
                    bind_viewporter);
   wl_global_create(wl_display_.get(), &zwp_secure_output_v1_interface, 1,
                    display_, bind_secure_output);
   wl_global_create(wl_display_.get(), &zwp_alpha_compositing_v1_interface, 1,
                    display_, bind_alpha_compositing);
   wl_global_create(wl_display_.get(), &zwp_remote_shell_v1_interface,
                    remote_shell_version, display_, bind_remote_shell);
   wl_global_create(wl_display_.get(), &zwp_gaming_input_v1_interface, 1,
                    display_, bind_gaming_input);
+  wl_global_create(wl_display_.get(), &zwp_stylus_v1_interface, 1, display_,
+                   bind_stylus);
 }
 
 Server::~Server() {}
 
 // static
 std::unique_ptr<Server> Server::Create(Display* display) {
   std::unique_ptr<Server> server(new Server(display));
 
   char* runtime_dir = getenv("XDG_RUNTIME_DIR");
   if (!runtime_dir) {
@@ skipping 51 matching lines @@
   DCHECK(event_loop);
   wl_event_loop_dispatch(event_loop, timeout.InMilliseconds());
 }
 
 void Server::Flush() {
   wl_display_flush_clients(wl_display_.get());
 }
 
 }  // namespace wayland
 }  // namespace exo