C++ TabContext::IsBrowserElement方法代码示例

bool
AssertAppProcess(TabContext& aContext,
                 AssertAppProcessType aType,
                 const char* aCapability)
{
  const mozilla::DocShellOriginAttributes& attr = aContext.OriginAttributesRef();
  nsCString suffix;
  attr.CreateSuffix(suffix);

  if (!aContext.SignedPkgOriginNoSuffix().IsEmpty()) {
    LOG("TabContext owning signed package origin: %s, originAttr; %s\n",
        nsCString(aContext.SignedPkgOriginNoSuffix()).get(),
        suffix.get());
  }

  // Do a origin-based permission check if the TabContext owns a signed package.
  if (!aContext.SignedPkgOriginNoSuffix().IsEmpty() &&
      (ASSERT_APP_HAS_PERMISSION == aType || ASSERT_APP_PROCESS_PERMISSION == aType)) {
    nsCString origin = aContext.SignedPkgOriginNoSuffix() + suffix;
    return CheckOriginPermission(origin, aCapability);
  }

  nsCOMPtr<mozIApplication> app = aContext.GetOwnOrContainingApp();
  return CheckAppTypeHelper(app, aType, aCapability, aContext.IsBrowserElement());
}

bool
AssertAppProcess(TabContext& aContext,
                 AssertAppProcessType aType,
                 const char* aCapability)
{

  nsCOMPtr<mozIApplication> app = aContext.GetOwnOrContainingApp();
  return CheckAppTypeHelper(app, aType, aCapability, aContext.IsBrowserElement());
}

// static
bool
IndexedDatabaseManager::TabContextMayAccessOrigin(const TabContext& aContext,
                                                  const nsACString& aOrigin)
{
  NS_ASSERTION(!aOrigin.IsEmpty(), "Empty origin!");

  // If aContext is for a browser element, it's allowed only to access other
  // browser elements.  But if aContext is not for a browser element, it may
  // access both browser and non-browser elements.
  nsAutoCString pattern;
  QuotaManager::GetOriginPatternStringMaybeIgnoreBrowser(
                                                aContext.OwnOrContainingAppId(),
                                                aContext.IsBrowserElement(),
                                                pattern);

  return PatternMatchesOrigin(pattern, aOrigin);
}

TabContext::TabContext(const IPCTabContext& aParams)
  : mInitialized(true)
{
  const IPCTabAppBrowserContext& appBrowser = aParams.appBrowserContext();
  switch(appBrowser.type()) {
    case IPCTabAppBrowserContext::TPopupIPCTabContext: {
      const PopupIPCTabContext &ipcContext = appBrowser.get_PopupIPCTabContext();

      TabContext *context;
      if (ipcContext.openerParent()) {
        context = static_cast<TabParent*>(ipcContext.openerParent());
        if (context->IsBrowserElement() && !ipcContext.isBrowserElement()) {
          // If the TabParent corresponds to a browser element, then it can only
          // open other browser elements, for security reasons.  We should have
          // checked this before calling the TabContext constructor, so this is
          // a fatal error.
          MOZ_CRASH();
        }
      }
      else if (ipcContext.openerChild()) {
        context = static_cast<TabChild*>(ipcContext.openerChild());
      }
      else {
        // This should be unreachable because PopupIPCTabContext::opener is not a
        // nullable field.
        MOZ_CRASH();
      }

      // If ipcContext is a browser element, then the opener's app-id becomes
      // our containing app-id.  Otherwise, our own and containing app-ids are
      // directly inherited from our opener.
      if (ipcContext.isBrowserElement()) {
        mIsBrowser = true;
        mOwnAppId = nsIScriptSecurityManager::NO_APP_ID;
        mContainingAppId = context->OwnAppId();
      }
      else {
        mIsBrowser = false;
        mOwnAppId = context->mOwnAppId;
        mContainingAppId = context->mContainingAppId;
      }
      break;
    }
    case IPCTabAppBrowserContext::TAppFrameIPCTabContext: {
      const AppFrameIPCTabContext &ipcContext =
        appBrowser.get_AppFrameIPCTabContext();

      mIsBrowser = false;
      mOwnAppId = ipcContext.ownAppId();
      mContainingAppId = ipcContext.appFrameOwnerAppId();
      break;
    }
    case IPCTabAppBrowserContext::TBrowserFrameIPCTabContext: {
      const BrowserFrameIPCTabContext &ipcContext =
        appBrowser.get_BrowserFrameIPCTabContext();

      mIsBrowser = true;
      mOwnAppId = nsIScriptSecurityManager::NO_APP_ID;
      mContainingAppId = ipcContext.browserFrameOwnerAppId();
      break;
    }
    case IPCTabAppBrowserContext::TVanillaFrameIPCTabContext: {
      mIsBrowser = false;
      mOwnAppId = nsIScriptSecurityManager::NO_APP_ID;
      mContainingAppId = nsIScriptSecurityManager::NO_APP_ID;
      break;
    }
    default: {
      MOZ_CRASH();
    }
  }

  mScrollingBehavior = aParams.scrollingBehavior();
}

TabContext::TabContext(const IPCTabContext& aParams)
  : mInitialized(true)
{
  const IPCTabAppBrowserContext& appBrowser = aParams.appBrowserContext();
  switch(appBrowser.type()) {
    case IPCTabAppBrowserContext::TPopupIPCTabContext: {
      const PopupIPCTabContext &ipcContext = appBrowser.get_PopupIPCTabContext();

      TabContext *context;
      if (ipcContext.openerParent()) {
        context = static_cast<TabParent*>(ipcContext.openerParent());
        if (context->IsBrowserElement() && !ipcContext.isBrowserElement()) {
          // If the TabParent corresponds to a browser element, then it can only
          // open other browser elements, for security reasons.  We should have
          // checked this before calling the TabContext constructor, so this is
          // a fatal error.
          MOZ_CRASH();
        }
      }
      else if (ipcContext.openerChild()) {
        context = static_cast<TabChild*>(ipcContext.openerChild());
      }
      else {
        // This should be unreachable because PopupIPCTabContext::opener is not a
        // nullable field.
        MOZ_CRASH();
      }

      // Browser elements can't nest other browser elements.  So if
      // our opener is browser element, we must be a new DOM window
      // opened by it.  In that case we inherit our containing app ID
      // (if any).
      //
      // Otherwise, we're a new app window and we inherit from our
      // opener app.
      if (ipcContext.isBrowserElement()) {
        mIsBrowser = true;
        mOwnAppId = nsIScriptSecurityManager::NO_APP_ID;
        mContainingAppId = context->OwnOrContainingAppId();
      }
      else {
        mIsBrowser = false;
        mOwnAppId = context->mOwnAppId;
        mContainingAppId = context->mContainingAppId;
      }
      break;
    }
    case IPCTabAppBrowserContext::TAppFrameIPCTabContext: {
      const AppFrameIPCTabContext &ipcContext =
        appBrowser.get_AppFrameIPCTabContext();

      mIsBrowser = false;
      mOwnAppId = ipcContext.ownAppId();
      mContainingAppId = ipcContext.appFrameOwnerAppId();
      break;
    }
    case IPCTabAppBrowserContext::TBrowserFrameIPCTabContext: {
      const BrowserFrameIPCTabContext &ipcContext =
        appBrowser.get_BrowserFrameIPCTabContext();

      mIsBrowser = true;
      mOwnAppId = nsIScriptSecurityManager::NO_APP_ID;
      mContainingAppId = ipcContext.browserFrameOwnerAppId();
      break;
    }
    case IPCTabAppBrowserContext::TVanillaFrameIPCTabContext: {
      mIsBrowser = false;
      mOwnAppId = nsIScriptSecurityManager::NO_APP_ID;
      mContainingAppId = nsIScriptSecurityManager::NO_APP_ID;
      break;
    }
    default: {
      MOZ_CRASH();
    }
  }

  mScrollingBehavior = aParams.scrollingBehavior();
}

MaybeInvalidTabContext::MaybeInvalidTabContext(const IPCTabContext& aParams)
  : mInvalidReason(nullptr)
{
  bool isBrowser = false;
  uint32_t ownAppId = NO_APP_ID;
  uint32_t containingAppId = NO_APP_ID;

  const IPCTabAppBrowserContext& appBrowser = aParams.appBrowserContext();
  switch(appBrowser.type()) {
    case IPCTabAppBrowserContext::TPopupIPCTabContext: {
      const PopupIPCTabContext &ipcContext = appBrowser.get_PopupIPCTabContext();

      TabContext *context;
      if (ipcContext.openerParent()) {
        context = static_cast<TabParent*>(ipcContext.openerParent());
        if (context->IsBrowserElement() && !ipcContext.isBrowserElement()) {
          // If the TabParent corresponds to a browser element, then it can only
          // open other browser elements, for security reasons.  We should have
          // checked this before calling the TabContext constructor, so this is
          // a fatal error.
          mInvalidReason = "Child is-browser process tried to "
                           "open a non-browser tab.";
          return;
        }
      } else if (ipcContext.openerChild()) {
        context = static_cast<TabChild*>(ipcContext.openerChild());
      } else {
        // This should be unreachable because PopupIPCTabContext::opener is not a
        // nullable field.
        mInvalidReason = "PopupIPCTabContext::opener was null (?!).";
        return;
      }

      // Browser elements can't nest other browser elements.  So if
      // our opener is browser element, we must be a new DOM window
      // opened by it.  In that case we inherit our containing app ID
      // (if any).
      //
      // Otherwise, we're a new app window and we inherit from our
      // opener app.
      if (ipcContext.isBrowserElement()) {
        isBrowser = true;
        ownAppId = NO_APP_ID;
        containingAppId = context->OwnOrContainingAppId();
      } else {
        isBrowser = false;
        ownAppId = context->mOwnAppId;
        containingAppId = context->mContainingAppId;
      }
      break;
    }
    case IPCTabAppBrowserContext::TAppFrameIPCTabContext: {
      const AppFrameIPCTabContext &ipcContext =
        appBrowser.get_AppFrameIPCTabContext();

      isBrowser = false;
      ownAppId = ipcContext.ownAppId();
      containingAppId = ipcContext.appFrameOwnerAppId();
      break;
    }
    case IPCTabAppBrowserContext::TBrowserFrameIPCTabContext: {
      const BrowserFrameIPCTabContext &ipcContext =
        appBrowser.get_BrowserFrameIPCTabContext();

      isBrowser = true;
      ownAppId = NO_APP_ID;
      containingAppId = ipcContext.browserFrameOwnerAppId();
      break;
    }
    case IPCTabAppBrowserContext::TVanillaFrameIPCTabContext: {
      isBrowser = false;
      ownAppId = NO_APP_ID;
      containingAppId = NO_APP_ID;
      break;
    }
    default: {
      MOZ_CRASH();
    }
  }

  nsCOMPtr<mozIApplication> ownApp = GetAppForId(ownAppId);
  if ((ownApp == nullptr) != (ownAppId == NO_APP_ID)) {
    mInvalidReason = "Got an ownAppId that didn't correspond to an app.";
    return;
  }

  nsCOMPtr<mozIApplication> containingApp = GetAppForId(containingAppId);
  if ((containingApp == nullptr) != (containingAppId == NO_APP_ID)) {
    mInvalidReason = "Got a containingAppId that didn't correspond to an app.";
    return;
  }

  bool rv;
  if (isBrowser) {
    rv = mTabContext.SetTabContextForBrowserFrame(containingApp,
                                                  aParams.scrollingBehavior());
  } else {
    rv = mTabContext.SetTabContextForAppFrame(ownApp,
                                              containingApp,
                                              aParams.scrollingBehavior());
//.........这里部分代码省略.........