Adding a Wayland basic toolkit

ui/wayland/wayland_input_device.cc

+// Copyright (c) 2011 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 "ui/wayland/wayland_input_device.h"
+
+#include <X11/extensions/XKBcommon.h>
+#include <wayland-client.h>
+
+#include "ui/wayland/events/wayland_event.h"
+#include "ui/wayland/wayland_widget.h"
+#include "ui/wayland/wayland_window.h"
+
+WaylandInputDevice::WaylandInputDevice(struct wl_display* display,
+    uint32_t id) : input_device_(wl_input_device_create(display, id, 1)),
+                   pointer_focus_(NULL),
+                   keyboard_focus_(NULL),
+                   keyboard_modifiers_(0) {
+
+  wl_input_device_add_listener(input_device_, &input_device_listener_, this);
+  wl_input_device_set_user_data(input_device_, this);
+
+  struct xkb_rule_names names;
+  names.rules = "evdev";
+  names.model = "pc105";
+  names.layout = "us";
+  names.variant = "";
+  names.options = "";
+
+  xkb_ = xkb_compile_keymap_from_rules(&names);
+}
+
+WaylandInputDevice::~WaylandInputDevice() {
+  if (input_device_)
+    wl_input_device_destroy(input_device_);
+}
+
+void WaylandInputDevice::Attach(struct wl_buffer* buffer,
+                                int32_t x, int32_t y) {
+  wl_input_device_attach(input_device_, last_event_time_, buffer, x, y);
+}
+
+void WaylandInputDevice::OnMotionNotify(void* data,
+    struct wl_input_device *input_device, uint32_t time,
+    int32_t x, int32_t y, int32_t sx, int32_t sy) {
+
+  WaylandInputDevice *device = static_cast<WaylandInputDevice*>(data);
+  WaylandWindow* window = device->pointer_focus_;
+
+  device->last_event_time_ = time;
+  device->global_position_ = Point(x, y);
+  device->surface_position_ = Point(sx, sy);
+
+  WaylandEvent event;
+  event.type = WAYLAND_MOTION;
+  event.motion.time = time;
+  event.motion.modifiers = device->keyboard_modifiers_;
+  event.motion.x = sx;
+  event.motion.y = sy;
+
+  window->GetWidget()->OnMotionNotify(event);
+}
+
+void WaylandInputDevice::OnButtonNotify(void* data,
+    struct wl_input_device *input_device, uint32_t time,
+    uint32_t button, uint32_t state) {
+
+  WaylandInputDevice *device = static_cast<WaylandInputDevice*>(data);
+  WaylandWindow* window = device->pointer_focus_;
+
+  device->last_event_time_ = time;
+
+  WaylandEvent event;
+  event.type = WAYLAND_BUTTON;
+  event.button.time = time;
+  event.button.button = button;
+  event.button.state = state;
+  event.button.modifiers = device->keyboard_modifiers_;
+  event.button.x = device->surface_position_.x;
+  event.button.y = device->surface_position_.y;
+
+  window->GetWidget()->OnButtonNotify(event);
+}
+
+void WaylandInputDevice::OnKeyNotify(void* data,
+    struct wl_input_device *input_device, uint32_t time,
+    uint32_t key, uint32_t state) {
+
+  WaylandInputDevice *device = static_cast<WaylandInputDevice*>(data);
+  WaylandWindow* window = device->keyboard_focus_;
+  struct xkb_desc *xkb = device->xkb_;
+
+  device->last_event_time_ = time;
+
+  WaylandEvent event;
+  event.type = WAYLAND_KEY;
+  event.key.time = time;
+  event.key.key = key;
+  event.key.state = state;
+
+  uint32_t code = key + xkb->min_key_code;
+  uint32_t level = 0;
+  if ((device->keyboard_modifiers_ & XKB_COMMON_SHIFT_MASK) &&
+      XkbKeyGroupWidth(xkb, code, 0) > 1) {
+    level = 1;
+  }
+
+  event.key.sym = XkbKeySymEntry(xkb, code, level, 0);
+  if (state)
+    device->keyboard_modifiers_ |= xkb->map->modmap[code];
+  else
+    device->keyboard_modifiers_ &= ~xkb->map->modmap[code];
+
+  event.key.modifiers = device->keyboard_modifiers_;
+
+  window->GetWidget()->OnKeyNotify(event);
+}
+
+void WaylandInputDevice::OnPointerFocus(void* data,
+    struct wl_input_device *input_device, uint32_t time,
+    struct wl_surface *surface, int32_t x, int32_t y,
+    int32_t sx, int32_t sy) {
+
+  WaylandInputDevice *device = static_cast<WaylandInputDevice*>(data);
+  WaylandWindow* window = device->pointer_focus_;
+
+  device->last_event_time_ = time;
+
+  WaylandEvent event;
+  event.type = WAYLAND_POINTER_FOCUS;
+  event.pointer_focus.time = time;
+  event.pointer_focus.x = sx;
+  event.pointer_focus.y = sy;
+
+  // If we have a window, then this means it loses focus
+  if (window) {
+    event.pointer_focus.state = 0;
+    device->pointer_focus_ = NULL;
+    window->GetWidget()->OnPointerFocus(event);
+  }
+
+  // If we have a surface, then a new window is in focus
+  if (surface) {
+    event.pointer_focus.state = 1;
+    window = static_cast<WaylandWindow*>(wl_surface_get_user_data(surface));
+    device->pointer_focus_ = window;
+    window->GetWidget()->OnPointerFocus(event);
+  }
+}
+
+void WaylandInputDevice::OnKeyboardFocus(void* data,
+    struct wl_input_device *input_device, uint32_t time,
+    struct wl_surface *surface, struct wl_array *keys) {
+
+  WaylandInputDevice *device = static_cast<WaylandInputDevice*>(data);
+  WaylandWindow* window = device->keyboard_focus_;
+  struct xkb_desc *xkb = device->xkb_;
+
+  device->last_event_time_ = time;
+
+  WaylandEvent event;
+  event.type = WAYLAND_KEYBOARD_FOCUS;
+  event.keyboard_focus.time = time;
+  device->keyboard_modifiers_ = 0;
+
+  for (uint32_t* k = static_cast<uint32_t*>(keys->data);
+       k < reinterpret_cast<uint32_t*>(
+          static_cast<char*>(keys->data) + keys->size);
+       k++) {

[Evan Martin, 2011/07/22 21:08:54]

I wonder if this loop would be easier to write as somethign like

uint32_t* codes = static_cast<uint32_t*>(keys->data);
int codes_size = keys->size / sizeof(uint32_t);
for (int i = 0; i < codes_size; ++i) {
  uint32_t code = codes[i] + xkb->min_key_code;
}

What do you think?

+    uint32_t code = *k + xkb->min_key_code;
+    device->keyboard_modifiers_ |= xkb->map->modmap[code];
+  }
+  event.keyboard_focus.modifiers = device->keyboard_modifiers_;
+
+  // If there is a window, then it loses focus
+  if (window) {
+    event.keyboard_focus.state = 0;
+    device->keyboard_focus_ = NULL;
+    window->GetWidget()->OnKeyboardFocus(event);
+  }
+
+  // If we have a surface, then a window gains focus
+  if (surface) {
+    event.keyboard_focus.state = 1;
+    window = static_cast<WaylandWindow*>(wl_surface_get_user_data(surface));
+    device->keyboard_focus_ = window;
+    window->GetWidget()->OnKeyboardFocus(event);
+  }
+}
+
+const struct wl_input_device_listener
+WaylandInputDevice::input_device_listener_ = {

[Evan Martin, 2011/07/22 21:08:54]

Maybe this should just be a const static within the ctor?  It's only used from
within that function.

+      WaylandInputDevice::OnMotionNotify,
+      WaylandInputDevice::OnButtonNotify,
+      WaylandInputDevice::OnKeyNotify,
+      WaylandInputDevice::OnPointerFocus,
+      WaylandInputDevice::OnKeyboardFocus,
+};