Implement ScreenOrientationDelegate on ChromeOS

ash/display/screen_orientation_delegate_chromeos.cc

+// Copyright 2014 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 "ash/display/screen_orientation_delegate_chromeos.h"
+
+#include "ash/ash_switches.h"
+#include "ash/display/display_info.h"
+#include "ash/display/display_manager.h"
+#include "ash/shell.h"
+#include "ash/wm/maximize_mode/maximize_mode_controller.h"
+#include "base/command_line.h"
+#include "content/public/browser/screen_orientation_provider.h"
+#include "content/public/browser/web_contents.h"
+#include "ui/aura/window.h"
+#include "ui/gfx/display.h"
+#include "ui/gfx/geometry/size.h"
+
+namespace {
+
+blink::WebScreenOrientationLockType GetDisplayNaturalOrientation() {
+  ash::DisplayManager* display_manager =
+      ash::Shell::GetInstance()->display_manager();
+  if (!display_manager->HasInternalDisplay())
+    return blink::WebScreenOrientationLockLandscape;
+
+  ash::DisplayInfo info =
+      display_manager->GetDisplayInfo(gfx::Display::InternalDisplayId());
+  gfx::Size size = info.size_in_pixel();
+  switch (info.rotation()) {
+    case gfx::Display::ROTATE_0:
+    case gfx::Display::ROTATE_180:
+      return size.height() >= size.width()
+                 ? blink::WebScreenOrientationLockPortrait
+                 : blink::WebScreenOrientationLockLandscape;
+    case gfx::Display::ROTATE_90:
+    case gfx::Display::ROTATE_270:
+      return size.height() < size.width()
+                 ? blink::WebScreenOrientationLockPortrait
+                 : blink::WebScreenOrientationLockLandscape;
+    default:
+      NOTREACHED();

[mlamouri (slow - plz ping), 2014/11/06 22:56:52]

nit: do you need a default here? Wouldn't the compilation break if there is no
|case| for a known value?

[jonross, 2014/11/07 18:47:38]

Done.

+  }
+
+  return blink::WebScreenOrientationLockLandscape;

[mlamouri (slow - plz ping), 2014/11/06 22:56:53]

nit: NOTREACHED()?

[jonross, 2014/11/07 18:47:38]

Done.

+}
+
+}  // namespace
+
+namespace ash {
+
+ScreenOrientationDelegate::ScreenOrientationDelegate()
+    : locking_window_(NULL),
+      natural_orientation_(GetDisplayNaturalOrientation()) {
+  content::ScreenOrientationProvider::SetDelegate(this);
+}
+
+ScreenOrientationDelegate::~ScreenOrientationDelegate() {
+  content::ScreenOrientationProvider::SetDelegate(NULL);
+}
+
+bool ScreenOrientationDelegate::FullScreenRequired(
+    content::WebContents* web_contents) {
+  return true;
+}
+
+void ScreenOrientationDelegate::Lock(
+    content::WebContents* web_contents,
+    blink::WebScreenOrientationLockType lock_orientation) {
+  aura::Window* requesting_window = web_contents->GetNativeView();
+
+  // TODO(jonross): Make ScreenOrientationDelegate responsible for rotation
+  // lock. Have MaximizeModeController, and TrayRotationLock both use it
+  // instead.
+  MaximizeModeController* controller =
+      Shell::GetInstance()->maximize_mode_controller();
+
+  // TODO(jonross): Track one rotation lock per window. When the active window
+  // changes apply any corresponding rotation lock.
+  if (!locking_window_) {
+    // Exit on user set rotation lock.

[mlamouri (slow - plz ping), 2014/11/06 22:56:52]

Is that on purpose? It's quite the opposite behaviour from Android where the
user rotation lock is only used as the default orientation. The application lock
will always overwrite it, which I think makes sense because some applications
might not even work. unless they are on the correct orientation.

[jonross, 2014/11/07 18:47:38]

We had planned this as a part of the temporary lock solution. Once we have user
vs application lock we were going to re-apply user lock once applications
exited.

I'll remove it in the interim for consistency with Android.

+    if (controller->rotation_locked())
+      return;
+    locking_window_ = requesting_window;
+  } else if (requesting_window != locking_window_) {
+    return;
+  }
+
+  switch (lock_orientation) {
+    case blink::WebScreenOrientationLockAny:
+      controller->SetRotationLocked(false);
+      locking_window_ = NULL;
+      break;
+    case blink::WebScreenOrientationLockDefault:
+      NOTREACHED();
+      break;
+    case blink::WebScreenOrientationLockPortraitPrimary:
+      LockRotationToPrimaryOrientation(blink::WebScreenOrientationLockPortrait);
+      break;
+    case blink::WebScreenOrientationLockLandscape:
+    case blink::WebScreenOrientationLockPortrait:
+      LockToRotationMatchingOrientation(lock_orientation);
+      break;
+    case blink::WebScreenOrientationLockPortraitSecondary:
+      LockRotationToSecondaryOrientation(
+          blink::WebScreenOrientationLockPortrait);
+      break;
+    case blink::WebScreenOrientationLockLandscapeSecondary:
+      LockRotationToSecondaryOrientation(
+          blink::WebScreenOrientationLockLandscape);
+      break;
+    case blink::WebScreenOrientationLockLandscapePrimary:
+      LockRotationToPrimaryOrientation(
+          blink::WebScreenOrientationLockLandscape);
+      break;
+    case blink::WebScreenOrientationLockNatural:
+      controller->LockRotation(gfx::Display::ROTATE_0);
+      break;
+    default:
+      NOTREACHED();
+      break;
+  }
+}
+
+bool ScreenOrientationDelegate::ScreenOrientationProviderSupported() {
+  return Shell::GetInstance()
+             ->maximize_mode_controller()
+             ->IsMaximizeModeWindowManagerEnabled() &&
+         CommandLine::ForCurrentProcess()->HasSwitch(
+             switches::kAshEnableTouchViewTesting);
+}
+
+void ScreenOrientationDelegate::Unlock(content::WebContents* web_contents) {
+  aura::Window* requesting_window = web_contents->GetNativeView();
+  if (requesting_window != locking_window_)
+    return;
+  locking_window_ = NULL;
+  Shell::GetInstance()->maximize_mode_controller()->SetRotationLocked(false);
+}
+
+void ScreenOrientationDelegate::LockRotationToPrimaryOrientation(
+    blink::WebScreenOrientationLockType lock_orientation) {
+  Shell::GetInstance()->maximize_mode_controller()->LockRotation(
+      natural_orientation_ == lock_orientation ? gfx::Display::ROTATE_0
+                                               : gfx::Display::ROTATE_90);
+}
+
+void ScreenOrientationDelegate::LockRotationToSecondaryOrientation(
+    blink::WebScreenOrientationLockType lock_orientation) {
+  Shell::GetInstance()->maximize_mode_controller()->LockRotation(
+      natural_orientation_ == lock_orientation ? gfx::Display::ROTATE_180
+                                               : gfx::Display::ROTATE_270);
+}
+
+void ScreenOrientationDelegate::LockToRotationMatchingOrientation(
+    blink::WebScreenOrientationLockType lock_orientation) {
+  // TODO(jonross): Update MaximizeModeController to allow rotation between
+  // two angles of an orientation (e.g. from ROTATE_0 to ROTATE_180, and from
+  // ROTATE_90 to ROTATE_270)
+  DisplayManager* display_manager = Shell::GetInstance()->display_manager();
+  if (!display_manager->HasInternalDisplay())
+    return;
+
+  gfx::Display::Rotation rotation =
+      display_manager->GetDisplayInfo(gfx::Display::InternalDisplayId())
+          .rotation();
+  MaximizeModeController* controller =
+      Shell::GetInstance()->maximize_mode_controller();
+  if (natural_orientation_ == lock_orientation) {
+    if (rotation == gfx::Display::ROTATE_0 ||
+        rotation == gfx::Display::ROTATE_180) {
+      controller->SetRotationLocked(true);
+    } else {
+      controller->LockRotation(gfx::Display::ROTATE_0);
+    }
+  } else {
+    if (rotation == gfx::Display::ROTATE_90 ||
+        rotation == gfx::Display::ROTATE_270) {
+      controller->SetRotationLocked(true);
+    } else {
+      controller->LockRotation(gfx::Display::ROTATE_90);
+    }
+  }
+}
+
+}  // namespace ash