content/browser/screen_orientation/screen_orientation_provider_android.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/browser/screen_orientation/screen_orientation_provider_android.h"
   6
   7 #include "content/browser/android/content_view_core_impl.h"
   8 #include "content/browser/screen_orientation/screen_orientation_dispatcher_host.h"
   9 #include "content/browser/web_contents/web_contents_impl.h"
  10 #include "content/public/browser/render_view_host.h"
  11 #include "content/public/browser/render_widget_host.h"
  12 #include "jni/ScreenOrientationProvider_jni.h"
  13 #include "third_party/WebKit/public/platform/WebLockOrientationError.h"
  14 #include "third_party/WebKit/public/platform/WebScreenInfo.h"
  15
  16 namespace content {
  17
  18 ScreenOrientationProviderAndroid::LockInformation::LockInformation(
  19     int request_id, blink::WebScreenOrientationLockType lock)
  20     : request_id(request_id), lock(lock) {}
  21
  22 ScreenOrientationProviderAndroid::ScreenOrientationProviderAndroid(
  23     ScreenOrientationDispatcherHost* dispatcher,
  24     WebContents* web_contents)
  25     : ScreenOrientationProvider(),
  26       WebContentsObserver(web_contents),
  27       dispatcher_(dispatcher),
  28       lock_applied_(false),
  29       pending_lock_(NULL) {
  30 }
  31
  32 ScreenOrientationProviderAndroid::~ScreenOrientationProviderAndroid() {
  33   if (pending_lock_)
  34     delete pending_lock_;
  35 }
  36
  37 WebContentsImpl* ScreenOrientationProviderAndroid::web_contents_impl() {
  38   return static_cast<WebContentsImpl*>(web_contents());
  39 }
  40
  41 // static
  42 bool ScreenOrientationProviderAndroid::Register(JNIEnv* env) {
  43   return RegisterNativesImpl(env);
  44 }
  45
  46 void ScreenOrientationProviderAndroid::LockOrientation(
  47     int request_id,
  48     blink::WebScreenOrientationLockType lock_orientation) {
  49   ContentViewCoreImpl* cvc =
  50       ContentViewCoreImpl::FromWebContents(web_contents());
  51   bool fullscreen_required = cvc ? cvc->IsFullscreenRequiredForOrientationLock()
  52                                  : true;
  53
  54   if (fullscreen_required &&
  55       !web_contents_impl()->IsFullscreenForCurrentTab()) {
  56     dispatcher_->NotifyLockError(
  57         request_id,
  58         blink::WebLockOrientationErrorFullScreenRequired);
  59     return;
  60   }
  61
  62   if (lock_orientation == blink::WebScreenOrientationLockNatural) {
  63     lock_orientation = GetNaturalLockType();
  64     if (lock_orientation == blink::WebScreenOrientationLockDefault) {
  65       // We are in a broken state, let's pretend we got canceled.
  66       dispatcher_->NotifyLockError(request_id,
  67                                    blink::WebLockOrientationErrorCanceled);
  68       return;
  69     }
  70   }
  71
  72   lock_applied_ = true;
  73   Java_ScreenOrientationProvider_lockOrientation(
  74       base::android::AttachCurrentThread(), lock_orientation);
  75
  76   // If two calls happen close to each other, Android will ignore the first.
  77   if (pending_lock_) {
  78     delete pending_lock_;
  79     pending_lock_ = NULL;
  80   }
  81
  82   // If the orientation we are locking to matches the current orientation, we
  83   // should succeed immediately.
  84   if (LockMatchesCurrentOrientation(lock_orientation)) {
  85     dispatcher_->NotifyLockSuccess(request_id);
  86     return;
  87   }
  88
  89   pending_lock_ = new LockInformation(request_id, lock_orientation);
  90 }
  91
  92 void ScreenOrientationProviderAndroid::UnlockOrientation() {
  93   if (!lock_applied_)
  94     return;
  95
  96   Java_ScreenOrientationProvider_unlockOrientation(
  97       base::android::AttachCurrentThread());
  98   lock_applied_ = false;
  99 }
 100
 101 void ScreenOrientationProviderAndroid::OnOrientationChange() {
 102   if (!pending_lock_)
 103     return;
 104
 105   if (LockMatchesCurrentOrientation(pending_lock_->lock)) {
 106     dispatcher_->NotifyLockSuccess(pending_lock_->request_id);
 107     delete pending_lock_;
 108     pending_lock_ = NULL;
 109   }
 110 }
 111
 112 void ScreenOrientationProviderAndroid::DidToggleFullscreenModeForTab(
 113     bool entered_fullscreen) {
 114   if (!lock_applied_)
 115     return;
 116
 117   // If fullscreen is not required in order to lock orientation, don't unlock
 118   // when fullscreen state changes.
 119   ContentViewCoreImpl* cvc =
 120       ContentViewCoreImpl::FromWebContents(web_contents());
 121   if (cvc && !cvc->IsFullscreenRequiredForOrientationLock())
 122     return;
 123
 124   DCHECK(!entered_fullscreen);
 125   UnlockOrientation();
 126 }
 127
 128 bool ScreenOrientationProviderAndroid::LockMatchesCurrentOrientation(
 129     blink::WebScreenOrientationLockType lock_orientation) {
 130   if (!web_contents()->GetRenderViewHost())
 131     return false;
 132
 133   RenderWidgetHost* rwh = web_contents()->GetRenderViewHost();
 134   blink::WebScreenInfo screen_info;
 135   rwh->GetWebScreenInfo(&screen_info);
 136
 137   switch (lock_orientation) {
 138   case blink::WebScreenOrientationLockPortraitPrimary:
 139     return screen_info.orientationType ==
 140         blink::WebScreenOrientationPortraitPrimary;
 141   case blink::WebScreenOrientationLockPortraitSecondary:
 142     return screen_info.orientationType ==
 143         blink::WebScreenOrientationPortraitSecondary;
 144   case blink::WebScreenOrientationLockLandscapePrimary:
 145     return screen_info.orientationType ==
 146         blink::WebScreenOrientationLandscapePrimary;
 147   case blink::WebScreenOrientationLockLandscapeSecondary:
 148     return screen_info.orientationType ==
 149         blink::WebScreenOrientationLandscapeSecondary;
 150   case blink::WebScreenOrientationLockLandscape:
 151     return screen_info.orientationType ==
 152         blink::WebScreenOrientationLandscapePrimary ||
 153         screen_info.orientationType ==
 154         blink::WebScreenOrientationLandscapeSecondary;
 155   case blink::WebScreenOrientationLockPortrait:
 156     return screen_info.orientationType ==
 157         blink::WebScreenOrientationPortraitPrimary ||
 158         screen_info.orientationType ==
 159         blink::WebScreenOrientationPortraitSecondary;
 160   case blink::WebScreenOrientationLockAny:
 161     return true;
 162   case blink::WebScreenOrientationLockNatural:
 163   case blink::WebScreenOrientationLockDefault:
 164     NOTREACHED();
 165     return false;
 166   }
 167
 168   NOTREACHED();
 169   return false;
 170 }
 171
 172 blink::WebScreenOrientationLockType
 173 ScreenOrientationProviderAndroid::GetNaturalLockType() const {
 174   if (!web_contents()->GetRenderViewHost())
 175     return blink::WebScreenOrientationLockDefault;
 176
 177   RenderWidgetHost* rwh = web_contents()->GetRenderViewHost();
 178   blink::WebScreenInfo screen_info;
 179   rwh->GetWebScreenInfo(&screen_info);
 180
 181   switch (screen_info.orientationType) {
 182   case blink::WebScreenOrientationPortraitPrimary:
 183   case blink::WebScreenOrientationPortraitSecondary:
 184     if (screen_info.orientationAngle == 0 ||
 185         screen_info.orientationAngle == 180) {
 186       return blink::WebScreenOrientationLockPortraitPrimary;
 187     }
 188     return blink::WebScreenOrientationLockLandscapePrimary;
 189   case blink::WebScreenOrientationLandscapePrimary:
 190   case blink::WebScreenOrientationLandscapeSecondary:
 191     if (screen_info.orientationAngle == 0 ||
 192         screen_info.orientationAngle == 180) {
 193       return blink::WebScreenOrientationLockLandscapePrimary;
 194     }
 195     return blink::WebScreenOrientationLockPortraitPrimary;
 196   case blink::WebScreenOrientationUndefined:
 197     NOTREACHED();
 198     return blink::WebScreenOrientationLockDefault;
 199   }
 200
 201   NOTREACHED();
 202   return blink::WebScreenOrientationLockDefault;
 203 }
 204
 205 // static
 206 void ScreenOrientationProviderAndroid::StartAccurateListening() {
 207   Java_ScreenOrientationProvider_startAccurateListening(
 208       base::android::AttachCurrentThread());
 209 }
 210
 211 // static
 212 void ScreenOrientationProviderAndroid::StopAccurateListening() {
 213   Java_ScreenOrientationProvider_stopAccurateListening(
 214       base::android::AttachCurrentThread());
 215 }
 216
 217 // static
 218 ScreenOrientationProvider* ScreenOrientationProvider::Create(
 219     ScreenOrientationDispatcherHost* dispatcher,
 220     WebContents* web_contents) {
 221   return new ScreenOrientationProviderAndroid(dispatcher, web_contents);
 222 }
 223
 224 } // namespace content