Wayland support for views. views_desktop on Wayland.

views/controls/scrollbar/native_scroll_bar_wayland.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 "views/controls/scrollbar/native_scroll_bar_wayland.h"
+
+#include "base/logging.h"
+#include "ui/base/keycodes/keyboard_codes_posix.h"
+#include "ui/wayland/wayland_widget.h"
+#include "views/controls/scrollbar/native_scroll_bar.h"
+#include "views/controls/scrollbar/scroll_bar.h"
+
+
+namespace views {
+
+////////////////////////////////////////////////////////////////////////////////
+// NativeScrollBarWayland, public:
+
+NativeScrollBarWayland::NativeScrollBarWayland(NativeScrollBar* scroll_bar)
+    : NativeControlWayland(),
+      native_scroll_bar_(scroll_bar) {
+  set_focus_view(scroll_bar);
+}
+
+NativeScrollBarWayland::~NativeScrollBarWayland() {
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// NativeScrollBarWayland, View overrides:
+
+void NativeScrollBarWayland::Layout() {
+  SetBoundsRect(native_scroll_bar_->GetLocalBounds());
+  NativeControlWayland::Layout();
+}
+
+gfx::Size NativeScrollBarWayland::GetPreferredSize() {
+  if (native_scroll_bar_->IsHorizontal())
+    return gfx::Size(0, GetHorizontalScrollBarHeight());
+  return gfx::Size(GetVerticalScrollBarWidth(), 0);
+}
+
+// TODO(oshima|jcampan): key/mouse events are not delievered and
+// the following code is not tested. It requires the focus manager to be fully
+// implemented.
+bool NativeScrollBarWayland::OnKeyPressed(const KeyEvent& event) {
+  if (!native_view())
+    return false;
+  switch (event.key_code()) {
+    case ui::VKEY_UP:
+      if (!native_scroll_bar_->IsHorizontal())
+        MoveStep(false /* negative */);
+      break;
+    case ui::VKEY_DOWN:
+      if (!native_scroll_bar_->IsHorizontal())
+        MoveStep(true /* positive */);
+      break;
+    case ui::VKEY_LEFT:
+      if (native_scroll_bar_->IsHorizontal())
+        MoveStep(false /* negative */);
+      break;
+    case ui::VKEY_RIGHT:
+      if (native_scroll_bar_->IsHorizontal())
+        MoveStep(true /* positive */);
+      break;
+    case ui::VKEY_PRIOR:
+      MovePage(false /* negative */);
+      break;
+    case ui::VKEY_NEXT:
+      MovePage(true /* positive */);
+      break;
+    case ui::VKEY_HOME:
+      MoveTo(0);
+      break;
+    case ui::VKEY_END:
+      MoveToBottom();
+      break;
+    default:
+      return false;
+  }
+  return true;
+}
+
+bool NativeScrollBarWayland::OnMouseWheel(const MouseWheelEvent& e) {
+  if (!native_view())
+    return false;
+  MoveBy(-e.offset());  // e.GetOffset() > 0 means scroll up.
+  return true;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// NativeScrollBarWayland, NativeControlWayland overrides:
+
+void NativeScrollBarWayland::CreateNativeControl() {
+  NOTIMPLEMENTED();
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// NativeScrollBarWayland, NativeScrollBarWrapper overrides:
+
+int NativeScrollBarWayland::GetPosition() const {
+  NOTIMPLEMENTED();
+  return 0;
+}
+
+View* NativeScrollBarWayland::GetView() {
+  return this;
+}
+
+void NativeScrollBarWayland::Update(int viewport_size,
+                                    int content_size,
+                                    int current_pos) {
+  NOTIMPLEMENTED();
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// NativeScrollBarWayland, private:
+
+void NativeScrollBarWayland::ValueChanged() {
+  ScrollBarController* controller = native_scroll_bar_->GetController();
+  controller->ScrollToPosition(native_scroll_bar_, GetPosition());
+}
+
+// static
+void NativeScrollBarWayland::CallValueChanged(ui::WaylandWidget* widget,
+    NativeScrollBarWayland* scroll_bar) {
+  scroll_bar->ValueChanged();
+}
+
+void NativeScrollBarWayland::MoveBy(int o) {
+  MoveTo(GetPosition() + o);
+}
+
+void NativeScrollBarWayland::MovePage(bool positive) {
+  ScrollBarController* controller = native_scroll_bar_->GetController();
+  MoveBy(controller->GetScrollIncrement(native_scroll_bar_, true, positive));
+}
+
+void NativeScrollBarWayland::MoveStep(bool positive) {
+  ScrollBarController* controller = native_scroll_bar_->GetController();
+  MoveBy(controller->GetScrollIncrement(native_scroll_bar_, false, positive));
+}
+
+void NativeScrollBarWayland::MoveTo(int p) {
+  if (p < native_scroll_bar_->GetMinPosition())
+    p = native_scroll_bar_->GetMinPosition();
+  if (p > native_scroll_bar_->GetMaxPosition())
+    p = native_scroll_bar_->GetMaxPosition();
+  NOTIMPLEMENTED();
+}
+
+void NativeScrollBarWayland::MoveToBottom() {
+  NOTIMPLEMENTED();
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// NativewScrollBarWrapper, public:
+
+// static
+NativeScrollBarWrapper* NativeScrollBarWrapper::CreateWrapper(
+    NativeScrollBar* scroll_bar) {
+  return new NativeScrollBarWayland(scroll_bar);
+}
+
+// static
+int NativeScrollBarWrapper::GetHorizontalScrollBarHeight() {
+  return 20;
+}
+
+// static
+int NativeScrollBarWrapper::GetVerticalScrollBarWidth() {
+  return 20;
+}
+
+}  // namespace views