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/display/display_info.h"
+#include "ash/display/display_manager.h"
+#include "ash/shell.h"
+#include "ash/wm/maximize_mode/maximize_mode_controller.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()) {
+    ash::DisplayInfo info =
+        display_manager->GetDisplayInfo(gfx::Display::InternalDisplayId());
+    gfx::Display::Rotation rotation = info.rotation();
+    gfx::Size size = info.size_in_pixel();
+    if (((rotation == gfx::Display::ROTATE_0 ||
+          rotation == gfx::Display::ROTATE_180) &&
+         size.height() >= size.width()) ||
+        ((rotation == gfx::Display::ROTATE_90 ||
+          rotation == gfx::Display::ROTATE_270) &&
+         size.height() < size.width())) {
+       return blink::WebScreenOrientationLockPortrait;
+    }
+  }
+  return blink::WebScreenOrientationLockLandscape;
+}
+
+}  // 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;
+}
+
+bool ScreenOrientationDelegate::Lock(content::WebContents* web_contents,
+    blink::WebScreenOrientationLockType lock_orientation) {
+  aura::Window* requesting_window = web_contents->GetNativeView();
+
+  // TODO(jonross): Track one rotation lock per window. When the active window
+  // changes apply any corresponding rotation lock.
+  if (!locking_window_)
+    locking_window_ = requesting_window;
+  else if (requesting_window != locking_window_)
+    return false;

[flackr, 2014/10/29 16:50:47]

Until we get the more complex model using, since this interferes with the user
lock lets change this to also fail to lock if the user lock is currently
applied. I.e. if (locked && requesting_window != locking_window_)

[jonross, 2014/10/29 18:34:02]

Slightly different check added to exit.

Will exit on (!locking_window_ && locked) which defines user lock. Allows web
page to change its orientation lock if desired.

[flackr, 2014/10/29 18:52:48]

Looks like it effectively evaluates to the same.

+
+  // TODO(jonross): Make ScreenOrientationDelegate responsible for rotation
+  // lock. Have MaximizeModeController, and TrayRotationLock both use it
+  // instead.
+  MaximizeModeController* controller =
+      Shell::GetInstance()->maximize_mode_controller();
+  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::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::WebScreenOrientationLockLandscape:
+      LockToRotationMatchingOrientation(lock_orientation);
+      break;
+    case blink::WebScreenOrientationLockNatural:
+      controller->LockRotation(gfx::Display::ROTATE_0);
+      break;
+    default:
+      NOTREACHED();
+      break;
+  }
+  return true;
+}
+
+bool ScreenOrientationDelegate::ScreenOrientationProviderSupported() {
+ return Shell::GetInstance()->maximize_mode_controller()->
+      IsMaximizeModeWindowManagerEnabled();
+}
+
+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