Attachment #809225 for bug #906852

Attachment #809225: Make layout/style/nsFontFaceLoader.* pointer notation follow layout code style for bug #906852

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#include "nsIConsoleService.h"

#include "nsStyleSet.h"
#include "nsPrintfCString.h"

using namespace mozilla;

#ifdef PR_LOGGING
static PRLogModuleInfo* 
GetFontDownloaderLog()
{
  static PRLogModuleInfo* sLog;
  if (!sLog)
    sLog = PR_NewLogModule("fontdownloader");
  return sLog;
}
#endif /* PR_LOGGING */

#define LOG(args) PR_LOG(GetFontDownloaderLog(), PR_LOG_DEBUG, args)
#define LOG_ENABLED() PR_LOG_TEST(GetFontDownloaderLog(), PR_LOG_DEBUG)


nsFontFaceLoader::nsFontFaceLoader(gfxMixedFontFamily* aFontFamily,
                                   gfxProxyFontEntry* aProxy,
                                   nsIURI* aFontURI,
                                   nsUserFontSet* aFontSet,
                                   nsIChannel* aChannel)
  : mFontFamily(aFontFamily),
    mFontEntry(aProxy),
    mFontURI(aFontURI),
    mFontSet(aFontSet),
    mChannel(aChannel)
{
}


    mLoadTimer = nullptr;
  }
  if (mFontSet) {
    mFontSet->RemoveLoader(this);
  }
}

void
nsFontFaceLoader::StartedLoading(nsIStreamLoader* aStreamLoader)
{
  int32_t loadTimeout =
    Preferences::GetInt("gfx.downloadable_fonts.fallback_delay", 3000);
  if (loadTimeout > 0) {
    mLoadTimer = do_CreateInstance("@mozilla.org/timer;1");
    if (mLoadTimer) {
      mLoadTimer->InitWithFuncCallback(LoadTimerCallback,
                                       static_cast<void*>(this),

    }
  } else {
    mFontEntry->mLoadingState = gfxProxyFontEntry::LOADING_SLOWLY;
  }
  mStreamLoader = aStreamLoader;
}

void
nsFontFaceLoader::LoadTimerCallback(nsITimer* aTimer, void* aClosure)
{
  nsFontFaceLoader* loader = static_cast<nsFontFaceLoader*>(aClosure);

  if (!loader->mFontSet) {
    // We've been canceled
    return;
  }

  gfxProxyFontEntry* pe = loader->mFontEntry.get();
  bool updateUserFontSet = true;

  // If the entry is loading, check whether it's >75% done; if so,
  // we allow another timeout period before showing a fallback font.
  if (pe->mLoadingState == gfxProxyFontEntry::LOADING_STARTED) {
    int64_t contentLength;
    uint32_t numBytesRead;
    if (NS_SUCCEEDED(loader->mChannel->GetContentLength(&contentLength)) &&

    }
  }

  // If the font is not 75% loaded, or if we've already timed out once
  // before, we mark this entry as "loading slowly", so the fallback
  // font will be used in the meantime, and tell the context to refresh.
  if (updateUserFontSet) {
    pe->mLoadingState = gfxProxyFontEntry::LOADING_SLOWLY;
    gfxUserFontSet* fontSet = loader->mFontSet;
    nsPresContext* ctx = loader->mFontSet->GetPresContext();
    NS_ASSERTION(ctx, "userfontset doesn't have a presContext?");
    if (ctx) {
      fontSet->IncrementGeneration();
      ctx->UserFontSetUpdated();
      LOG(("fontdownloader (%p) timeout reflow\n", loader));
    }
  }
}

           this, fontURI.get()));
    } else {
      LOG(("fontdownloader (%p) download failed - font uri: (%s) error: %8.8x\n", 
           this, fontURI.get(), aStatus));
    }
  }
#endif

  nsPresContext* ctx = mFontSet->GetPresContext();
  NS_ASSERTION(ctx && !ctx->PresShell()->IsDestroying(),
               "We should have been canceled already");

  if (NS_SUCCEEDED(aStatus)) {
    // for HTTP requests, check whether the request _actually_ succeeded;
    // the "request status" in aStatus does not necessarily indicate this,
    // because HTTP responses such as 404 (Not Found) will still result in
    // a success code and potentially an HTML error page from the server

                                   nsISupports* aContext)
{
  nsresult rv;

  if (!aSourcePrincipal)
    return NS_OK;

  // check with the security manager
  nsIScriptSecurityManager* secMan = nsContentUtils::GetSecurityManager();
  rv = secMan->CheckLoadURIWithPrincipal(aSourcePrincipal, aTargetURI,
                                        nsIScriptSecurityManager::STANDARD);
  if (NS_FAILED(rv)) {
    return rv;
  }

  // check content policy
  int16_t shouldLoad = nsIContentPolicy::ACCEPT;


  if (NS_FAILED(rv) || NS_CP_REJECTED(shouldLoad)) {
    return NS_ERROR_CONTENT_BLOCKED;
  }

  return NS_OK;
}

nsUserFontSet::nsUserFontSet(nsPresContext* aContext)
  : mPresContext(aContext)
{
  NS_ASSERTION(mPresContext, "null context passed to nsUserFontSet");
}

nsUserFontSet::~nsUserFontSet()
{
  NS_ASSERTION(mLoaders.Count() == 0, "mLoaders should have been emptied");

nsUserFontSet::Destroy()
{
  mPresContext = nullptr;
  mLoaders.EnumerateEntries(DestroyIterator, nullptr);
  mRules.Clear();
}

void
nsUserFontSet::RemoveLoader(nsFontFaceLoader* aLoader)
{
  mLoaders.RemoveEntry(aLoader);
}

nsresult
nsUserFontSet::StartLoad(gfxMixedFontFamily* aFamily,
                         gfxProxyFontEntry* aProxy,
                         const gfxFontFaceSrc* aFontFaceSrc)
{
  nsresult rv;

  nsIPresShell* ps = mPresContext->PresShell();
  if (!ps)
    return NS_ERROR_FAILURE;

  nsCOMPtr<nsIStreamLoader> streamLoader;
  nsCOMPtr<nsILoadGroup> loadGroup(ps->GetDocument()->GetDocumentLoadGroup());

  nsCOMPtr<nsIChannel> channel;
  // get Content Security Policy from principal to pass into channel

    modified = true;
    // Any in-progress loaders for obsolete rules should be cancelled,
    // as the resource being downloaded will no longer be required.
    // We need to explicitly remove any loaders here, otherwise the loaders
    // will keep their "orphaned" font entries alive until they complete,
    // even after the oldRules array is deleted.
    size_t count = oldRules.Length();
    for (size_t i = 0; i < count; ++i) {
      gfxFontEntry* fe = oldRules[i].mFontEntry;
      if (!fe->mIsProxy) {
        continue;
      }
      gfxProxyFontEntry* proxy = static_cast<gfxProxyFontEntry*>(fe);
      nsFontFaceLoader* loader = proxy->mLoader;
      if (loader) {
        loader->Cancel();
        RemoveLoader(loader);
      }
    }
  }

  if (modified) {
    IncrementGeneration();
  }

  return modified;
}

void
nsUserFontSet::InsertRule(nsCSSFontFaceRule* aRule, uint8_t aSheetType,
                          nsTArray<FontFaceRuleRecord>& aOldRules,
                          bool& aFontSetModified)
{
  NS_ABORT_IF_FALSE(aRule->GetType() == mozilla::css::Rule::FONT_FACE_RULE,
                    "InsertRule passed a non-fontface CSS rule");

  // set up family name
  nsAutoString fontfamily;

  }

  // set up src array
  nsTArray<gfxFontFaceSrc> srcArray;

  aRule->GetDesc(eCSSFontDesc_Src, val);
  unit = val.GetUnit();
  if (unit == eCSSUnit_Array) {
    nsCSSValue::Array* srcArr = val.GetArrayValue();
    size_t numSrc = srcArr->Count();
    
    for (size_t i = 0; i < numSrc; i++) {
      val = srcArr->Item(i);
      unit = val.GetUnit();
      gfxFontFaceSrc* face = srcArray.AppendElements(1);
      if (!face)
        return;

      switch (unit) {

      case eCSSUnit_Local_Font:
        val.GetStringValue(face->mLocalName);
        face->mIsLocal = true;

      mRules.AppendElement(ruleRec);
    }
    // this was a new rule and fontEntry, so note that the set was modified
    aFontSetModified = true;
  }
}

void
nsUserFontSet::ReplaceFontEntry(gfxMixedFontFamily* aFamily,
                                gfxProxyFontEntry* aProxy,
                                gfxFontEntry* aFontEntry)
{
  // aProxy is being supplanted by the "real" font aFontEntry, so we need to
  // update any rules that refer to it. Note that there may be multiple rules
  // that refer to the same proxy - e.g. if a stylesheet was loaded multiple
  // times, so that several identical @font-face rules are present.
  for (uint32_t i = 0; i < mRules.Length(); ++i) {
    if (mRules[i].mFontEntry == aProxy) {
      mRules[i].mFontEntry = aFontEntry;
    }
  }
  aFamily->ReplaceFontEntry(aProxy, aFontEntry);
}

nsCSSFontFaceRule*
nsUserFontSet::FindRuleForEntry(gfxFontEntry* aFontEntry)
{
  for (uint32_t i = 0; i < mRules.Length(); ++i) {
    if (mRules[i].mFontEntry == aFontEntry) {
      return mRules[i].mContainer.mRule;
    }
  }
  return nullptr;
}

nsresult
nsUserFontSet::LogMessage(gfxMixedFontFamily* aFamily,
                          gfxProxyFontEntry* aProxy,
                          const char*        aMessage,
                          uint32_t          aFlags,
                          nsresult          aStatus)
{
  nsCOMPtr<nsIConsoleService>
    console(do_GetService(NS_CONSOLESERVICE_CONTRACTID));
  if (!console) {
    return NS_ERROR_NOT_AVAILABLE;
  }

    if (aProxy->mSrcList[aProxy->mSrcIndex].mURI) {
      aProxy->mSrcList[aProxy->mSrcIndex].mURI->GetSpec(fontURI);
    } else {
      fontURI.AppendLiteral("(invalid URI)");
    }
  }

  char weightKeywordBuf[8]; // plenty to sprintf() a uint16_t
  const char* weightKeyword;
  const nsAFlatCString& weightKeywordString =
    nsCSSProps::ValueToKeyword(aProxy->Weight(),
                               nsCSSProps::kFontWeightKTable);
  if (weightKeywordString.Length() > 0) {
    weightKeyword = weightKeywordString.get();
  } else {
    sprintf(weightKeywordBuf, "%u", aProxy->Weight());
    weightKeyword = weightKeywordBuf;

  if (NS_SUCCEEDED(rv)) {
    console->LogMessage(scriptError);
  }

  return NS_OK;
}

nsresult
nsUserFontSet::CheckFontLoad(const gfxFontFaceSrc* aFontFaceSrc,
                             nsIPrincipal** aPrincipal,
                             bool* aBypassCache)
{
  // check same-site origin
  nsIPresShell* ps = mPresContext->PresShell();
  if (!ps)
    return NS_ERROR_FAILURE;

  NS_ASSERTION(aFontFaceSrc && !aFontFaceSrc->mIsLocal,
               "bad font face url passed to fontloader");
  NS_ASSERTION(aFontFaceSrc->mURI, "null font uri");
  if (!aFontFaceSrc->mURI)
    return NS_ERROR_FAILURE;

      }
    }
  }

  return rv;
}

nsresult
nsUserFontSet::SyncLoadFontData(gfxProxyFontEntry* aFontToLoad,
                                const gfxFontFaceSrc* aFontFaceSrc,
                                uint8_t*& aBuffer,
                                uint32_t& aBufferLength)
{
  nsresult rv;

  nsCOMPtr<nsIChannel> channel;
  // get Content Security Policy from principal to pass into channel
  nsCOMPtr<nsIChannelPolicy> channelPolicy;
  nsCOMPtr<nsIContentSecurityPolicy> csp;
  rv = aFontToLoad->mPrincipal->GetCsp(getter_AddRefs(csp));

  }

  return NS_OK;
}

bool
nsUserFontSet::GetPrivateBrowsing()
{
  nsIPresShell* ps = mPresContext->PresShell();
  if (!ps) {
    return false;
  }

  nsCOMPtr<nsISupports> container = ps->GetDocument()->GetContainer();
  if (!container) {
    return false;
  }





class nsIPrincipal;

class nsFontFaceLoader;

// nsUserFontSet - defines the loading mechanism for downloadable fonts
class nsUserFontSet : public gfxUserFontSet
{
public:
  nsUserFontSet(nsPresContext* aContext);
  ~nsUserFontSet();

  // Called when this font set is no longer associated with a presentation.
  void Destroy();

  // starts loading process, creating and initializing a nsFontFaceLoader obj
  // returns whether load process successfully started or not
  nsresult StartLoad(gfxMixedFontFamily* aFamily,
                     gfxProxyFontEntry* aFontToLoad,
                     const gfxFontFaceSrc* aFontFaceSrc);

  // Called by nsFontFaceLoader when the loader has completed normally.
  // It's removed from the mLoaders set.
  void RemoveLoader(nsFontFaceLoader* aLoader);

  bool UpdateRules(const nsTArray<nsFontFaceRuleContainer>& aRules);

  nsPresContext* GetPresContext() { return mPresContext; }

  virtual void ReplaceFontEntry(gfxMixedFontFamily* aFamily,
                                gfxProxyFontEntry* aProxy,
                                gfxFontEntry* aFontEntry);

  nsCSSFontFaceRule* FindRuleForEntry(gfxFontEntry* aFontEntry);

protected:
  // The font-set keeps track of the collection of rules, and their
  // corresponding font entries (whether proxies or real entries),
  // so that we can update the set without having to throw away
  // all the existing fonts.
  struct FontFaceRuleRecord {
    nsRefPtr<gfxFontEntry>       mFontEntry;
    nsFontFaceRuleContainer      mContainer;
  };

  void InsertRule(nsCSSFontFaceRule* aRule, uint8_t aSheetType,
                  nsTArray<FontFaceRuleRecord>& oldRules,
                  bool& aFontSetModified);

  virtual nsresult LogMessage(gfxMixedFontFamily* aFamily,
                              gfxProxyFontEntry* aProxy,
                              const char* aMessage,
                              uint32_t aFlags = nsIScriptError::errorFlag,
                              nsresult aStatus = NS_OK);

  virtual nsresult CheckFontLoad(const gfxFontFaceSrc* aFontFaceSrc,
                                 nsIPrincipal** aPrincipal,
                                 bool* aBypassCache);

  virtual nsresult SyncLoadFontData(gfxProxyFontEntry* aFontToLoad,
                                    const gfxFontFaceSrc* aFontFaceSrc,
                                    uint8_t*& aBuffer,
                                    uint32_t& aBufferLength);

  virtual bool GetPrivateBrowsing() MOZ_OVERRIDE;

  nsPresContext* mPresContext;  // weak reference

  // Set of all loaders pointing to us. These are not strong pointers,
  // but that's OK because nsFontFaceLoader always calls RemoveLoader on
  // us before it dies (unless we die first).
  nsTHashtable< nsPtrHashKey<nsFontFaceLoader> > mLoaders;

  nsTArray<FontFaceRuleRecord>   mRules;
};

class nsFontFaceLoader : public nsIStreamLoaderObserver
{
public:
  nsFontFaceLoader(gfxMixedFontFamily* aFontFamily,
                   gfxProxyFontEntry* aFontToLoad, nsIURI* aFontURI, 
                   nsUserFontSet* aFontSet, nsIChannel* aChannel);

  virtual ~nsFontFaceLoader();

  NS_DECL_ISUPPORTS
  NS_DECL_NSISTREAMLOADEROBSERVER 

  // initiate the load
  nsresult Init();
  // cancel the load and remove its reference to mFontSet
  void Cancel();

  void DropChannel() { mChannel = nullptr; }

  void StartedLoading(nsIStreamLoader* aStreamLoader);

  static void LoadTimerCallback(nsITimer* aTimer, void* aClosure);

  static nsresult CheckLoadAllowed(nsIPrincipal* aSourcePrincipal,
                                   nsIURI* aTargetURI,
                                   nsISupports* aContext);

private:
  nsRefPtr<gfxMixedFontFamily> mFontFamily;
  nsRefPtr<gfxProxyFontEntry>  mFontEntry;
  nsCOMPtr<nsIURI>        mFontURI;
  nsRefPtr<nsUserFontSet> mFontSet;
  nsCOMPtr<nsIChannel>    mChannel;
  nsCOMPtr<nsITimer>      mLoadTimer;

  nsIStreamLoader*        mStreamLoader;
};

#endif /* !defined(nsFontFaceLoader_h_) */

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