ozone/platform/wayland: Add support for wl_output_interface

ui/ozone/platform/wayland/wayland_output.cc

+// Copyright 2016 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/ozone/platform/wayland/wayland_output.h"
+
+#include <wayland-client.h>
+
+#include "ui/display/screen.h"
+#include "ui/ozone/platform/wayland/wayland_connection.h"
+
+namespace ui {
+
+WaylandOutput::WaylandOutput(uint32_t name, wl_output* output)
+    : name_(name), output_(output), rect_(0, 0, 0, 0), observer_(nullptr) {
+  static const wl_output_listener output_listener = {
+      &WaylandOutput::OutputHandleGeometry, &WaylandOutput::OutputHandleMode,
+  };
+  wl_output_add_listener(output, &output_listener, this);
+}
+
+WaylandOutput::~WaylandOutput() {}
+
+// static
+void WaylandOutput::OutputHandleGeometry(void* data,
+                                         wl_output* output,
+                                         int32_t x,
+                                         int32_t y,
+                                         int32_t physical_width,
+                                         int32_t physical_height,
+                                         int32_t subpixel,
+                                         const char* make,
+                                         const char* model,
+                                         int32_t output_transform) {
+  WaylandOutput* wayland_output = static_cast<WaylandOutput*>(data);
+  wayland_output->rect_.set_origin(gfx::Point(x, y));
+}
+
+// static
+void WaylandOutput::OutputHandleMode(void* data,
+                                     wl_output* wl_output,
+                                     uint32_t flags,
+                                     int32_t width,
+                                     int32_t height,
+                                     int32_t refresh) {
+  WaylandOutput* output = static_cast<WaylandOutput*>(data);
+
+  if (flags & WL_OUTPUT_MODE_CURRENT) {
+    output->rect_.set_width(width);
+    output->rect_.set_height(height);
+
+    if (display::Screen::GetScreen())
+      display::Screen::GetScreen()->OnOutputGeometryChanged(output->name_,
+                                                            output->rect_);
+    if (output->observer())
+      output->observer()->OnOutputReadyForUse();
+  }
+}
+
+WaylandOutput::Observer::Observer(const base::Closure& closure,
+                                  WaylandOutput* output)
+    : closure_(closure) {
+  DCHECK(!closure_.is_null());
+  output->SetObserver(this);
+}
+
+WaylandOutput::Observer::~Observer() {}
+
+void WaylandOutput::Observer::OnOutputReadyForUse() {
+  if (!closure_.is_null())
+    closure_.Run();
+}
+
+}  // namespace ui