Revert "Create direct write font proxy classes and unit tests."

content/child/dwrite_font_proxy/dwrite_font_proxy_win.cc

Index: content/child/dwrite_font_proxy/dwrite_font_proxy_win.cc
diff --git a/content/child/dwrite_font_proxy/dwrite_font_proxy_win.cc b/content/child/dwrite_font_proxy/dwrite_font_proxy_win.cc
deleted file mode 100644
index 0462d71144ed77d2f51ce5fcd7c7f777332b5c51..0000000000000000000000000000000000000000
--- a/content/child/dwrite_font_proxy/dwrite_font_proxy_win.cc
+++ /dev/null
@@ -1,514 +0,0 @@
-// Copyright 2015 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 "content/child/dwrite_font_proxy/dwrite_font_proxy_win.h"
-
-#include <utility>
-
-#include "base/debug/crash_logging.h"
-#include "base/logging.h"
-#include "base/metrics/histogram_macros.h"
-#include "base/strings/utf_string_conversions.h"
-#include "base/win/scoped_handle.h"
-#include "content/child/dwrite_font_proxy/dwrite_localized_strings_win.h"
-#include "content/common/dwrite_font_proxy_messages.h"
-#include "ipc/ipc_sender.h"
-
-namespace mswr = Microsoft::WRL;
-
-namespace content {
-
-namespace {
-
-// This enum is used to define the buckets for an enumerated UMA histogram.
-// Hence,
-//   (a) existing enumerated constants should never be deleted or reordered, and
-//   (b) new constants should only be appended at the end of the enumeration.
-enum DirectWriteLoadFamilyResult {
-  LOAD_FAMILY_SUCCESS_SINGLE_FAMILY = 0,
-  LOAD_FAMILY_SUCCESS_MATCHED_FAMILY = 1,
-  LOAD_FAMILY_ERROR_MULTIPLE_FAMILIES = 2,
-  LOAD_FAMILY_ERROR_NO_FAMILIES = 3,
-  LOAD_FAMILY_ERROR_NO_COLLECTION = 4,
-
-  LOAD_FAMILY_MAX_VALUE
-};
-
-const char kFontKeyName[] = "font_key_name";
-
-void LogLoadFamilyResult(DirectWriteLoadFamilyResult result) {
-  UMA_HISTOGRAM_ENUMERATION("DirectWrite.Fonts.Proxy.LoadFamily", result,
-                            LOAD_FAMILY_MAX_VALUE);
-}
-
-}  // namespace
-
-DWriteFontCollectionProxy::DWriteFontCollectionProxy() = default;
-
-DWriteFontCollectionProxy::~DWriteFontCollectionProxy() = default;
-
-HRESULT DWriteFontCollectionProxy::FindFamilyName(const WCHAR* family_name,
-                                                  UINT32* index,
-                                                  BOOL* exists) {
-  DCHECK(family_name);
-  DCHECK(index);
-  DCHECK(exists);
-  TRACE_EVENT0("dwrite", "FontProxy::FindFamilyName");
-
-  uint32_t family_index = 0;
-  base::string16 name(family_name);
-
-  auto iter = family_names_.find(name);
-  if (iter != family_names_.end()) {
-    *index = iter->second;
-    *exists = iter->second != UINT_MAX;
-    return S_OK;
-  }
-
-  if (!sender_.Run()->Send(
-          new DWriteFontProxyMsg_FindFamily(name, &family_index))) {
-    return E_FAIL;
-  }
-
-  if (family_index != UINT32_MAX) {
-    if (!CreateFamily(family_index))
-      return E_FAIL;
-    *exists = TRUE;
-    *index = family_index;
-    families_[family_index]->SetName(name);
-  } else {
-    *exists = FALSE;
-    *index = UINT32_MAX;
-  }
-
-  family_names_[name] = *index;
-  return S_OK;
-}
-
-HRESULT DWriteFontCollectionProxy::GetFontFamily(
-    UINT32 index,
-    IDWriteFontFamily** font_family) {
-  DCHECK(font_family);
-
-  if (index < families_.size() && families_[index]) {
-    families_[index].CopyTo(font_family);
-    return S_OK;
-  }
-
-  if (!CreateFamily(index))
-    return E_FAIL;
-
-  families_[index].CopyTo(font_family);
-  return S_OK;
-}
-
-UINT32 DWriteFontCollectionProxy::GetFontFamilyCount() {
-  if (family_count_ != UINT_MAX)
-    return family_count_;
-
-  TRACE_EVENT0("dwrite", "FontProxy::GetFontFamilyCount");
-
-  uint32_t family_count = 0;
-  if (!sender_.Run()->Send(
-          new DWriteFontProxyMsg_GetFamilyCount(&family_count))) {
-    return 0;
-  }
-  family_count_ = family_count;
-  return family_count;
-}
-
-HRESULT DWriteFontCollectionProxy::GetFontFromFontFace(
-    IDWriteFontFace* font_face,
-    IDWriteFont** font) {
-  DCHECK(font_face);
-  DCHECK(font);
-
-  for (const auto& family : families_) {
-    if (family && family->GetFontFromFontFace(font_face, font))
-      return S_OK;
-  }
-  return E_FAIL;
-}
-
-HRESULT DWriteFontCollectionProxy::CreateEnumeratorFromKey(
-    IDWriteFactory* factory,
-    const void* collection_key,
-    UINT32 collection_key_size,
-    IDWriteFontFileEnumerator** font_file_enumerator) {
-  if (!collection_key || collection_key_size != sizeof(uint32_t))
-    return E_INVALIDARG;
-
-  TRACE_EVENT0("dwrite", "FontProxy::LoadingFontFiles");
-
-  const uint32_t* family_index =
-      reinterpret_cast<const uint32_t*>(collection_key);
-
-  if (*family_index >= GetFontFamilyCount())
-    return E_INVALIDARG;
-
-  // If we already loaded the family we should reuse the existing collection.
-  DCHECK(!families_[*family_index]->IsLoaded());
-
-  std::vector<base::string16> file_names;
-  if (!sender_.Run()->Send(
-          new DWriteFontProxyMsg_GetFontFiles(*family_index, &file_names))) {
-    return E_FAIL;
-  }
-
-  HRESULT hr = mswr::MakeAndInitialize<FontFileEnumerator>(
-      font_file_enumerator, factory, this, &file_names);
-
-  if (!SUCCEEDED(hr))
-    return E_FAIL;
-
-  return S_OK;
-}
-
-HRESULT DWriteFontCollectionProxy::CreateStreamFromKey(
-    const void* font_file_reference_key,
-    UINT32 font_file_reference_key_size,
-    IDWriteFontFileStream** font_file_stream) {
-  if (!font_file_reference_key)
-    return E_FAIL;
-
-  const base::char16* file_name =
-      reinterpret_cast<const base::char16*>(font_file_reference_key);
-  DCHECK_EQ(font_file_reference_key_size % sizeof(base::char16), 0u);
-  size_t file_name_size =
-      static_cast<size_t>(font_file_reference_key_size) / sizeof(base::char16);
-
-  if (file_name_size == 0 || file_name[file_name_size - 1] != L'\0')
-    return E_FAIL;
-
-  TRACE_EVENT0("dwrite", "FontFileEnumerator::CreateStreamFromKey");
-
-  mswr::ComPtr<IDWriteFontFileStream> stream;
-  if (!SUCCEEDED(mswr::MakeAndInitialize<FontFileStream>(&stream, file_name)))
-    return E_FAIL;
-  *font_file_stream = stream.Detach();
-  return S_OK;
-}
-
-HRESULT DWriteFontCollectionProxy::RuntimeClassInitialize(
-    IDWriteFactory* factory,
-    const base::Callback<IPC::Sender*(void)>& sender) {
-  DCHECK(factory);
-
-  factory_ = factory;
-  sender_ = sender;
-
-  HRESULT hr = factory->RegisterFontCollectionLoader(this);
-  DCHECK(SUCCEEDED(hr));
-  hr = factory_->RegisterFontFileLoader(this);
-  DCHECK(SUCCEEDED(hr));
-  return S_OK;
-}
-
-void DWriteFontCollectionProxy::Unregister() {
-  factory_->UnregisterFontCollectionLoader(this);
-  factory_->UnregisterFontFileLoader(this);
-}
-
-bool DWriteFontCollectionProxy::LoadFamily(
-    UINT32 family_index,
-    IDWriteFontCollection** containing_collection) {
-  TRACE_EVENT0("dwrite", "FontProxy::LoadFamily");
-
-  uint32_t index = family_index;
-  // CreateCustomFontCollection ends up calling
-  // DWriteFontCollectionProxy::CreateEnumeratorFromKey.
-  HRESULT hr = factory_->CreateCustomFontCollection(
-      this /*collectionLoader*/, reinterpret_cast<const void*>(&index),
-      sizeof(index), containing_collection);
-
-  return SUCCEEDED(hr);
-}
-
-bool DWriteFontCollectionProxy::LoadFamilyNames(
-    UINT32 family_index,
-    IDWriteLocalizedStrings** localized_strings) {
-  TRACE_EVENT0("dwrite", "FontProxy::LoadFamilyNames");
-
-  std::vector<std::pair<base::string16, base::string16>> strings;
-  if (!sender_.Run()->Send(
-          new DWriteFontProxyMsg_GetFamilyNames(family_index, &strings))) {
-    return false;
-  }
-
-  HRESULT hr = mswr::MakeAndInitialize<DWriteLocalizedStrings>(
-      localized_strings, &strings);
-
-  return SUCCEEDED(hr);
-}
-
-bool DWriteFontCollectionProxy::CreateFamily(UINT32 family_index) {
-  if (family_index < families_.size() && families_[family_index])
-    return true;
-
-  UINT32 family_count = GetFontFamilyCount();
-  if (family_index >= family_count)
-    return false;
-
-  if (families_.size() < family_count)
-    families_.resize(family_count);
-
-  mswr::ComPtr<DWriteFontFamilyProxy> family;
-  HRESULT hr = mswr::MakeAndInitialize<DWriteFontFamilyProxy>(&family, this,
-                                                              family_index);
-  DCHECK(SUCCEEDED(hr));
-  DCHECK_LT(family_index, families_.size());
-
-  families_[family_index] = family;
-  return true;
-}
-
-DWriteFontFamilyProxy::DWriteFontFamilyProxy() = default;
-
-DWriteFontFamilyProxy::~DWriteFontFamilyProxy() = default;
-
-HRESULT DWriteFontFamilyProxy::GetFontCollection(
-    IDWriteFontCollection** font_collection) {
-  DCHECK(font_collection);
-
-  proxy_collection_.CopyTo(font_collection);
-  return S_OK;
-}
-
-UINT32 DWriteFontFamilyProxy::GetFontCount() {
-  // We could conceivably proxy just the font count. However, calling
-  // GetFontCount is almost certain to be followed by a series of GetFont
-  // calls which will need to load all the fonts anyway, so we might as
-  // well save an IPC here.
-  if (!LoadFamily())
-    return 0;
-
-  return family_->GetFontCount();
-}
-
-HRESULT DWriteFontFamilyProxy::GetFont(UINT32 index, IDWriteFont** font) {
-  DCHECK(font);
-
-  if (index >= GetFontCount())
-    return E_INVALIDARG;
-  if (!LoadFamily())
-    return E_FAIL;
-
-  return family_->GetFont(index, font);
-}
-
-HRESULT DWriteFontFamilyProxy::GetFamilyNames(IDWriteLocalizedStrings** names) {
-  DCHECK(names);
-
-  // Prefer the real thing, if available.
-  if (family_) {
-    family_names_.Reset();  // Release cached data.
-    return family_->GetFamilyNames(names);
-  }
-
-  // If already cached, use the cache.
-  if (family_names_) {
-    family_names_.CopyTo(names);
-    return S_OK;
-  }
-
-  TRACE_EVENT0("dwrite", "FontProxy::GetFamilyNames");
-
-  // Otherwise, do the IPC.
-  if (!proxy_collection_->LoadFamilyNames(family_index_, &family_names_))
-    return E_FAIL;
-
-  family_names_.CopyTo(names);
-  return S_OK;
-}
-
-HRESULT DWriteFontFamilyProxy::GetFirstMatchingFont(
-    DWRITE_FONT_WEIGHT weight,
-    DWRITE_FONT_STRETCH stretch,
-    DWRITE_FONT_STYLE style,
-    IDWriteFont** matching_font) {
-  DCHECK(matching_font);
-
-  if (!LoadFamily())
-    return E_FAIL;
-
-  return family_->GetFirstMatchingFont(weight, stretch, style, matching_font);
-}
-
-HRESULT DWriteFontFamilyProxy::GetMatchingFonts(
-    DWRITE_FONT_WEIGHT weight,
-    DWRITE_FONT_STRETCH stretch,
-    DWRITE_FONT_STYLE style,
-    IDWriteFontList** matching_fonts) {
-  DCHECK(matching_fonts);
-
-  if (!LoadFamily())
-    return E_FAIL;
-
-  return family_->GetMatchingFonts(weight, stretch, style, matching_fonts);
-}
-
-HRESULT DWriteFontFamilyProxy::RuntimeClassInitialize(
-    DWriteFontCollectionProxy* collection,
-    UINT32 index) {
-  DCHECK(collection);
-
-  proxy_collection_ = collection;
-  family_index_ = index;
-  return S_OK;
-}
-
-bool DWriteFontFamilyProxy::GetFontFromFontFace(IDWriteFontFace* font_face,
-                                                IDWriteFont** font) {
-  DCHECK(font_face);
-  DCHECK(font);
-
-  if (!family_)
-    return false;
-
-  mswr::ComPtr<IDWriteFontCollection> collection;
-  HRESULT hr = family_->GetFontCollection(&collection);
-  DCHECK(SUCCEEDED(hr));
-  hr = collection->GetFontFromFontFace(font_face, font);
-
-  return SUCCEEDED(hr);
-}
-
-void DWriteFontFamilyProxy::SetName(const base::string16& family_name) {
-  family_name_.assign(family_name);
-}
-
-bool DWriteFontFamilyProxy::IsLoaded() {
-  return family_ != nullptr;
-}
-
-bool DWriteFontFamilyProxy::LoadFamily() {
-  if (family_)
-    return true;
-
-  SCOPED_UMA_HISTOGRAM_TIMER("DirectWrite.Fonts.Proxy.LoadFamilyTime");
-
-  base::debug::ScopedCrashKey crash_key(kFontKeyName,
-                                        base::WideToUTF8(family_name_));
-
-  mswr::ComPtr<IDWriteFontCollection> collection;
-  if (!proxy_collection_->LoadFamily(family_index_, &collection)) {
-    LogLoadFamilyResult(LOAD_FAMILY_ERROR_NO_COLLECTION);
-    return false;
-  }
-
-  UINT32 family_count = collection->GetFontFamilyCount();
-
-  HRESULT hr;
-  if (family_count > 1) {
-    // Some fonts are packaged in a single file containing multiple families. In
-    // such a case we can find the right family by family name.
-    DCHECK(!family_name_.empty());
-    UINT32 family_index = 0;
-    BOOL found = FALSE;
-    hr =
-        collection->FindFamilyName(family_name_.c_str(), &family_index, &found);
-    if (SUCCEEDED(hr) && found) {
-      hr = collection->GetFontFamily(family_index, &family_);
-      LogLoadFamilyResult(LOAD_FAMILY_SUCCESS_MATCHED_FAMILY);
-      return SUCCEEDED(hr);
-    }
-  }
-
-  DCHECK_LE(family_count, 1u);
-
-  if (family_count == 0) {
-    // This is really strange, we successfully loaded no fonts?!
-    LogLoadFamilyResult(LOAD_FAMILY_ERROR_NO_FAMILIES);
-    return false;
-  }
-
-  LogLoadFamilyResult(family_count == 1 ? LOAD_FAMILY_SUCCESS_SINGLE_FAMILY
-                                        : LOAD_FAMILY_ERROR_MULTIPLE_FAMILIES);
-
-  hr = collection->GetFontFamily(0, &family_);
-
-  return SUCCEEDED(hr);
-}
-
-FontFileEnumerator::FontFileEnumerator() = default;
-
-FontFileEnumerator::~FontFileEnumerator() = default;
-
-HRESULT FontFileEnumerator::GetCurrentFontFile(IDWriteFontFile** file) {
-  DCHECK(file);
-  if (current_file_ >= file_names_.size())
-    return E_FAIL;
-
-  TRACE_EVENT0("dwrite", "FontFileEnumerator::GetCurrentFontFile (memmap)");
-  // CreateCustomFontFileReference ends up calling
-  // DWriteFontCollectionProxy::CreateStreamFromKey.
-  return factory_->CreateCustomFontFileReference(
-      reinterpret_cast<const void*>(file_names_[current_file_].c_str()),
-      (file_names_[current_file_].length() + 1) * sizeof(base::char16),
-      loader_.Get() /*IDWriteFontFileLoader*/, file);
-}
-
-HRESULT FontFileEnumerator::MoveNext(BOOL* has_current_file) {
-  DCHECK(has_current_file);
-
-  TRACE_EVENT0("dwrite", "FontFileEnumerator::MoveNext");
-  if (next_file_ >= file_names_.size()) {
-    *has_current_file = FALSE;
-    current_file_ = UINT_MAX;
-    return S_OK;
-  }
-
-  current_file_ = next_file_;
-  ++next_file_;
-  *has_current_file = TRUE;
-  return S_OK;
-}
-
-HRESULT FontFileEnumerator::RuntimeClassInitialize(
-    IDWriteFactory* factory,
-    IDWriteFontFileLoader* loader,
-    std::vector<base::string16>* file_names) {
-  factory_ = factory;
-  loader_ = loader;
-  file_names_.swap(*file_names);
-  file_streams_.resize(file_names_.size());
-  return S_OK;
-}
-
-FontFileStream::FontFileStream() = default;
-
-FontFileStream::~FontFileStream() = default;
-
-HRESULT FontFileStream::GetFileSize(UINT64* file_size) {
-  *file_size = data_.length();
-  return S_OK;
-}
-
-HRESULT FontFileStream::GetLastWriteTime(UINT64* last_write_time) {
-  *last_write_time = 0;
-  return S_OK;
-}
-
-HRESULT FontFileStream::ReadFileFragment(const void** fragment_start,
-                                         UINT64 fragment_offset,
-                                         UINT64 fragment_size,
-                                         void** fragment_context) {
-  if (fragment_offset + fragment_size < fragment_offset)
-    return E_FAIL;
-  if (fragment_offset + fragment_size > data_.length())
-    return E_FAIL;
-  *fragment_start = data_.data() + fragment_offset;
-  *fragment_context = nullptr;
-  return S_OK;
-}
-
-HRESULT FontFileStream::RuntimeClassInitialize(
-    const base::string16& file_name) {
-  data_.Initialize(base::FilePath(file_name));
-  if (!data_.IsValid())
-    return E_FAIL;
-  return S_OK;
-}
-
-}  // namespace content