content/public/browser/screen_orientation_provider.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/public/browser/screen_orientation_provider.h"
   6
   7 #include "content/browser/renderer_host/render_view_host_delegate.h"
   8 #include "content/public/browser/render_view_host.h"
   9 #include "content/public/browser/screen_orientation_delegate.h"
  10 #include "content/public/browser/screen_orientation_dispatcher_host.h"
  11 #include "content/public/browser/web_contents.h"
  12 #include "third_party/WebKit/public/platform/WebLockOrientationError.h"
  13 #include "third_party/WebKit/public/platform/WebScreenInfo.h"
  14
  15 namespace content {
  16
  17 ScreenOrientationDelegate* ScreenOrientationProvider::delegate_ = NULL;
  18
  19 ScreenOrientationProvider::LockInformation::LockInformation(int request_id,
  20     blink::WebScreenOrientationLockType lock)
  21     : request_id(request_id),
  22       lock(lock) {
  23 }
  24
  25 ScreenOrientationProvider::ScreenOrientationProvider(
  26     ScreenOrientationDispatcherHost* dispatcher_host,
  27     WebContents* web_contents)
  28     : WebContentsObserver(web_contents),
  29       dispatcher_(dispatcher_host),
  30       lock_applied_(false) {
  31 }
  32
  33 ScreenOrientationProvider::~ScreenOrientationProvider() {
  34 }
  35
  36 void ScreenOrientationProvider::LockOrientation(int request_id,
  37     blink::WebScreenOrientationLockType lock_orientation) {
  38
  39   if (!delegate_ || !delegate_->ScreenOrientationProviderSupported()) {
  40     dispatcher_->NotifyLockError(request_id,
  41                                  blink::WebLockOrientationErrorNotAvailable);
  42     return;
  43   }
  44
  45   if (delegate_->FullScreenRequired(web_contents())) {
  46     RenderViewHost* rvh = web_contents()->GetRenderViewHost();
  47     if (!rvh) {
  48       dispatcher_->NotifyLockError(request_id,
  49                                    blink::WebLockOrientationErrorCanceled);
  50       return;
  51     }
  52     RenderViewHostDelegate* rvhd = rvh->GetDelegate();
  53     if (!rvhd) {
  54       dispatcher_->NotifyLockError(request_id,
  55                                    blink::WebLockOrientationErrorCanceled);
  56       return;
  57     }
  58     if (!rvhd->IsFullscreenForCurrentTab()) {
  59       dispatcher_->NotifyLockError(request_id,
  60           blink::WebLockOrientationErrorFullScreenRequired);
  61       return;
  62     }
  63   }
  64
  65   if (lock_orientation == blink::WebScreenOrientationLockNatural) {
  66     lock_orientation = GetNaturalLockType();
  67     if (lock_orientation == blink::WebScreenOrientationLockDefault) {
  68       // We are in a broken state, let's pretend we got canceled.
  69       dispatcher_->NotifyLockError(request_id,
  70                                    blink::WebLockOrientationErrorCanceled);
  71       return;
  72     }
  73   }
  74
  75   lock_applied_ = true;
  76   delegate_->Lock(lock_orientation);
  77
  78   // If two calls happen close to each other some platforms will ignore the
  79   // first. A successful lock will be once orientation matches the latest
  80   // request.
  81   pending_lock_.reset();
  82
  83   // If the orientation we are locking to matches the current orientation, we
  84   // should succeed immediately.
  85   if (LockMatchesCurrentOrientation(lock_orientation)) {
  86     dispatcher_->NotifyLockSuccess(request_id);
  87     return;
  88   }
  89
  90   pending_lock_.reset(new LockInformation(request_id, lock_orientation));
  91 }
  92
  93 void ScreenOrientationProvider::UnlockOrientation() {
  94   if (!lock_applied_ || !delegate_)
  95     return;
  96
  97   delegate_->Unlock();
  98
  99   lock_applied_ = false;
 100   pending_lock_.reset();
 101 }
 102
 103 void ScreenOrientationProvider::OnOrientationChange() {
 104   if (!pending_lock_.get())
 105     return;
 106
 107   if (LockMatchesCurrentOrientation(pending_lock_->lock)) {
 108     dispatcher_->NotifyLockSuccess(pending_lock_->request_id);
 109     pending_lock_.reset();
 110   }
 111 }
 112
 113 void ScreenOrientationProvider::SetDelegate(
 114     ScreenOrientationDelegate* delegate) {
 115   delegate_ = delegate;
 116 }
 117
 118 void ScreenOrientationProvider::DidToggleFullscreenModeForTab(
 119     bool entered_fullscreen) {
 120   if (!lock_applied_ || !delegate_)
 121     return;
 122
 123   // If fullscreen is not required in order to lock orientation, don't unlock
 124   // when fullscreen state changes.
 125   if (!delegate_->FullScreenRequired(web_contents()))
 126     return;
 127
 128   DCHECK(!entered_fullscreen);
 129   UnlockOrientation();
 130 }
 131
 132 blink::WebScreenOrientationLockType
 133     ScreenOrientationProvider::GetNaturalLockType() const {
 134   RenderWidgetHost* rwh = web_contents()->GetRenderViewHost();
 135   if (!rwh)
 136     return blink::WebScreenOrientationLockDefault;
 137
 138   blink::WebScreenInfo screen_info;
 139   rwh->GetWebScreenInfo(&screen_info);
 140
 141   switch (screen_info.orientationType) {
 142     case blink::WebScreenOrientationPortraitPrimary:
 143     case blink::WebScreenOrientationPortraitSecondary:
 144       if (screen_info.orientationAngle == 0 ||
 145           screen_info.orientationAngle == 180) {
 146         return blink::WebScreenOrientationLockPortraitPrimary;
 147       }
 148       return blink::WebScreenOrientationLockLandscapePrimary;
 149     case blink::WebScreenOrientationLandscapePrimary:
 150     case blink::WebScreenOrientationLandscapeSecondary:
 151       if (screen_info.orientationAngle == 0 ||
 152           screen_info.orientationAngle == 180) {
 153         return blink::WebScreenOrientationLockLandscapePrimary;
 154       }
 155       return blink::WebScreenOrientationLockPortraitPrimary;
 156     case blink::WebScreenOrientationUndefined:
 157       NOTREACHED();
 158       return blink::WebScreenOrientationLockDefault;
 159   }
 160
 161   NOTREACHED();
 162   return blink::WebScreenOrientationLockDefault;
 163 }
 164
 165 bool ScreenOrientationProvider::LockMatchesCurrentOrientation(
 166     blink::WebScreenOrientationLockType lock) {
 167   RenderWidgetHost* rwh = web_contents()->GetRenderViewHost();
 168   if (!rwh)
 169     return false;
 170
 171   blink::WebScreenInfo screen_info;
 172   rwh->GetWebScreenInfo(&screen_info);
 173
 174   switch (lock) {
 175     case blink::WebScreenOrientationLockPortraitPrimary:
 176       return screen_info.orientationType ==
 177           blink::WebScreenOrientationPortraitPrimary;
 178     case blink::WebScreenOrientationLockPortraitSecondary:
 179       return screen_info.orientationType ==
 180           blink::WebScreenOrientationPortraitSecondary;
 181     case blink::WebScreenOrientationLockLandscapePrimary:
 182       return screen_info.orientationType ==
 183           blink::WebScreenOrientationLandscapePrimary;
 184     case blink::WebScreenOrientationLockLandscapeSecondary:
 185       return screen_info.orientationType ==
 186           blink::WebScreenOrientationLandscapeSecondary;
 187     case blink::WebScreenOrientationLockLandscape:
 188       return screen_info.orientationType ==
 189           blink::WebScreenOrientationLandscapePrimary ||
 190           screen_info.orientationType ==
 191           blink::WebScreenOrientationLandscapeSecondary;
 192     case blink::WebScreenOrientationLockPortrait:
 193       return screen_info.orientationType ==
 194           blink::WebScreenOrientationPortraitPrimary ||
 195           screen_info.orientationType ==
 196           blink::WebScreenOrientationPortraitSecondary;
 197     case blink::WebScreenOrientationLockAny:
 198       return true;
 199     case blink::WebScreenOrientationLockNatural:
 200     case blink::WebScreenOrientationLockDefault:
 201       NOTREACHED();
 202       return false;
 203   }
 204
 205   NOTREACHED();
 206   return false;
 207 }
 208
 209 } // namespace content