Implementation of dwrite font proxy and removal of dwrite font cache

content/child/dwrite_font_proxy/dwrite_font_proxy_win_unittest.cc

Index: content/child/dwrite_font_proxy/dwrite_font_proxy_win_unittest.cc
diff --git a/content/child/dwrite_font_proxy/dwrite_font_proxy_win_unittest.cc b/content/child/dwrite_font_proxy/dwrite_font_proxy_win_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..5996f273372841fb4456768f5faf92f0f239f729
--- /dev/null
+++ b/content/child/dwrite_font_proxy/dwrite_font_proxy_win_unittest.cc
@@ -0,0 +1,371 @@
+// Copyright (c) 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 <dwrite.h>
+#include <shlobj.h>
+#include <wrl.h>
+
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "content/common/dwrite_font_proxy_messages.h"
+#include "content/common/view_messages.h"
+#include "content/test/dwrite_font_fake_sender_win.h"
+#include "ipc/ipc_message_macros.h"
+#include "ipc/ipc_sender.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace mswr = Microsoft::WRL;
+
+namespace content {
+
+void CreateDWriteFactory(IUnknown** factory) {
+  using DWriteCreateFactoryProc = decltype(DWriteCreateFactory)*;
+  HMODULE dwrite_dll = LoadLibraryW(L"dwrite.dll");
+  if (!dwrite_dll)
+    return;
+
+  DWriteCreateFactoryProc dwrite_create_factory_proc =
+      reinterpret_cast<DWriteCreateFactoryProc>(
+          GetProcAddress(dwrite_dll, "DWriteCreateFactory"));
+  if (!dwrite_create_factory_proc)
+    return;
+
+  dwrite_create_factory_proc(DWRITE_FACTORY_TYPE_SHARED,
+                             __uuidof(IDWriteFactory), factory);
+}
+
+class DWriteFontProxyUnitTest : public testing::Test {
+ public:
+  DWriteFontProxyUnitTest() {
+    if (factory == nullptr)
+      return;
+    fake_collection_ = new FakeFontCollection();
+    SetupFonts(fake_collection_.get());
+    mswr::MakeAndInitialize<DWriteFontCollectionProxy>(
+        &collection_, factory.Get(),
+        base::Bind(&FakeFontCollection::GetTrackingSender, fake_collection_));
+  }
+
+  ~DWriteFontProxyUnitTest() { collection_->Unregister(); }
+
+  static void SetupFonts(FakeFontCollection* fonts) {
+    fonts->AddFont(L"Aardvark")
+        .AddFamilyName(L"en-us", L"Aardvark")
+        .AddFamilyName(L"de-de", L"Erdferkel")
+        .AddFilePath(L"X:\\Nonexistent\\Folder\\Aardvark.ttf");
+    FakeFont& arial =
+        fonts->AddFont(L"Arial").AddFamilyName(L"en-us", L"Arial");
+    for (auto& path : arial_font_files)
+      arial.AddFilePath(path);
+    fonts->AddFont(L"Times New Roman")
+        .AddFamilyName(L"en-us", L"Times New Roman")
+        .AddFilePath(L"X:\\Nonexistent\\Folder\\Times.ttf");
+  }
+
+  static void SetUpTestCase() {
+    CreateDWriteFactory(&factory);
+
+    std::vector<base::char16> font_path;
+    font_path.resize(MAX_PATH);
+    SHGetSpecialFolderPath(NULL /* hwndOwner - reserved */, font_path.data(),
+                           CSIDL_FONTS, FALSE /* fCreate*/);
+    base::string16 arial;
+    arial.append(font_path.data()).append(L"\\arial.ttf");
+    base::string16 arialbd;
+    arialbd.append(font_path.data()).append(L"\\arialbd.ttf");
+    arial_font_files.push_back(arial);
+    arial_font_files.push_back(arialbd);
+  }
+
+ protected:
+  scoped_refptr<FakeFontCollection> fake_collection_;
+  mswr::ComPtr<DWriteFontCollectionProxy> collection_;
+
+  static std::vector<base::string16> arial_font_files;
+  static mswr::ComPtr<IDWriteFactory> factory;
+};
+std::vector<base::string16> DWriteFontProxyUnitTest::arial_font_files;
+mswr::ComPtr<IDWriteFactory> DWriteFontProxyUnitTest::factory;
+
+TEST_F(DWriteFontProxyUnitTest, GetFontFamilyCount) {
+  if (factory == nullptr)
+    return;
+
+  uint32 family_count = collection_->GetFontFamilyCount();
+
+  EXPECT_EQ(3, family_count);
+  ASSERT_EQ(1, fake_collection_->MessageCount());
+  EXPECT_EQ(DWriteFontProxyMsg_GetFamilyCount::ID,
+            fake_collection_->GetMessage(0)->type());
+
+  // Calling again should not cause another message to be sent.
+  family_count = collection_->GetFontFamilyCount();
+  EXPECT_EQ(3, family_count);
+  ASSERT_EQ(1, fake_collection_->MessageCount());
+}
+
+TEST_F(DWriteFontProxyUnitTest, FindFamilyNameShouldFindFamily) {
+  HRESULT hr;
+  if (factory == nullptr)
+    return;
+
+  uint32 index = UINT_MAX;
+  BOOL exists = FALSE;
+  hr = collection_->FindFamilyName(L"Arial", &index, &exists);
+
+  EXPECT_EQ(S_OK, hr);
+  EXPECT_EQ(1, index);
+  EXPECT_TRUE(exists);
+  ASSERT_EQ(2, fake_collection_->MessageCount());
+  EXPECT_EQ(DWriteFontProxyMsg_FindFamily::ID,
+            fake_collection_->GetMessage(0)->type());
+  EXPECT_EQ(DWriteFontProxyMsg_GetFamilyCount::ID,
+            fake_collection_->GetMessage(1)->type());
+}
+
+TEST_F(DWriteFontProxyUnitTest, FindFamilyNameShouldReturnUINTMAXWhenNotFound) {
+  HRESULT hr;
+  if (factory == nullptr)
+    return;
+
+  uint32 index = UINT_MAX;
+  BOOL exists = FALSE;
+  hr = collection_->FindFamilyName(L"Not a font", &index, &exists);
+
+  EXPECT_EQ(S_OK, hr);
+  EXPECT_EQ(UINT32_MAX, index);
+  EXPECT_FALSE(exists);
+  ASSERT_EQ(1, fake_collection_->MessageCount());
+  EXPECT_EQ(DWriteFontProxyMsg_FindFamily::ID,
+            fake_collection_->GetMessage(0)->type());
+}
+
+TEST_F(DWriteFontProxyUnitTest, FindFamilyNameShouldNotSendDuplicateIPC) {
+  HRESULT hr;
+  if (factory == nullptr)
+    return;
+
+  uint32 index = UINT_MAX;
+  BOOL exists = FALSE;
+  hr = collection_->FindFamilyName(L"Arial", &index, &exists);
+  ASSERT_EQ(S_OK, hr);
+  ASSERT_EQ(2, fake_collection_->MessageCount());
+
+  hr = collection_->FindFamilyName(L"Arial", &index, &exists);
+
+  EXPECT_EQ(S_OK, hr);
+  EXPECT_EQ(2, fake_collection_->MessageCount());
+}
+
+TEST_F(DWriteFontProxyUnitTest, GetFontFamilyShouldCreateFamily) {
+  HRESULT hr;
+  if (factory == nullptr)
+    return;
+
+  uint32 index = UINT_MAX;
+  BOOL exists = FALSE;
+  hr = collection_->FindFamilyName(L"Arial", &index, &exists);
+  ASSERT_EQ(2, fake_collection_->MessageCount());
+
+  mswr::ComPtr<IDWriteFontFamily> family;
+  hr = collection_->GetFontFamily(2, &family);
+
+  EXPECT_EQ(S_OK, hr);
+  EXPECT_EQ(2, fake_collection_->MessageCount());
+  EXPECT_NE(nullptr, family.Get());
+}
+
+void CheckLocale(IDWriteLocalizedStrings* strings,
+                 const base::string16& locale_name,
+                 const base::string16& expected_value) {
+  UINT32 locale_index = 0;
+  BOOL locale_exists = FALSE;
+  strings->FindLocaleName(locale_name.data(), &locale_index, &locale_exists);
+  EXPECT_TRUE(locale_exists);
+
+  UINT32 name_length = 0;
+  strings->GetLocaleNameLength(locale_index, &name_length);
+  EXPECT_EQ(locale_name.size(), name_length);
+  base::string16 actual_name;
+  name_length++;
+  actual_name.resize(name_length);
+  strings->GetLocaleName(locale_index, const_cast<WCHAR*>(actual_name.data()),
+                         name_length);
+  EXPECT_STREQ(locale_name.c_str(), actual_name.c_str());
+
+  UINT32 string_length = 0;
+  strings->GetStringLength(locale_index, &string_length);
+  EXPECT_EQ(expected_value.size(), string_length);
+  base::string16 actual_value;
+  string_length++;
+  actual_value.resize(string_length);
+  strings->GetString(locale_index, const_cast<WCHAR*>(actual_value.data()),
+                     string_length);
+  EXPECT_STREQ(expected_value.c_str(), actual_value.c_str());
+}
+
+TEST_F(DWriteFontProxyUnitTest, GetFamilyNames) {
+  HRESULT hr;
+  if (factory == nullptr)
+    return;
+
+  uint32 index = UINT_MAX;
+  BOOL exists = FALSE;
+  hr = collection_->FindFamilyName(L"Aardvark", &index, &exists);
+  ASSERT_EQ(2, fake_collection_->MessageCount());
+
+  mswr::ComPtr<IDWriteFontFamily> family;
+  hr = collection_->GetFontFamily(index, &family);
+  EXPECT_EQ(S_OK, hr);
+  EXPECT_EQ(2, fake_collection_->MessageCount());
+
+  mswr::ComPtr<IDWriteLocalizedStrings> names;
+  hr = family->GetFamilyNames(&names);
+  EXPECT_EQ(S_OK, hr);
+  EXPECT_EQ(3, fake_collection_->MessageCount());
+  EXPECT_EQ(DWriteFontProxyMsg_GetFamilyNames::ID,
+            fake_collection_->GetMessage(2)->type());
+
+  EXPECT_EQ(2, names->GetCount());
+  UINT32 locale_index = 0;
+  BOOL locale_exists = FALSE;
+  hr = names->FindLocaleName(L"fr-fr", &locale_index, &locale_exists);
+  EXPECT_EQ(S_OK, hr);
+  EXPECT_FALSE(locale_exists);
+
+  CheckLocale(names.Get(), L"en-us", L"Aardvark");
+  CheckLocale(names.Get(), L"de-de", L"Erdferkel");
+
+  base::string16 unused;
+  unused.resize(25);
+  hr = names->GetLocaleName(15234, const_cast<WCHAR*>(unused.data()),
+                            unused.size() - 1);
+  EXPECT_FALSE(SUCCEEDED(hr));
+}
+
+TEST_F(DWriteFontProxyUnitTest, GetFontCollection) {
+  HRESULT hr;
+  if (factory == nullptr)
+    return;
+
+  uint32 index = UINT_MAX;
+  BOOL exists = FALSE;
+  hr = collection_->FindFamilyName(L"Arial", &index, &exists);
+  ASSERT_EQ(2, fake_collection_->MessageCount());
+
+  mswr::ComPtr<IDWriteFontFamily> family;
+  hr = collection_->GetFontFamily(2, &family);
+  EXPECT_EQ(S_OK, hr);
+  EXPECT_EQ(2, fake_collection_->MessageCount());
+
+  mswr::ComPtr<IDWriteFontCollection> returned_collection;
+  hr = family->GetFontCollection(&returned_collection);
+  EXPECT_EQ(S_OK, hr);
+  EXPECT_EQ(2, fake_collection_->MessageCount());
+  EXPECT_EQ(collection_.Get(), returned_collection.Get());
+}
+
+TEST_F(DWriteFontProxyUnitTest, GetFamilyNamesShouldNotIPCAfterLoadingFamily) {
+  HRESULT hr;
+  if (factory == nullptr)
+    return;
+
+  uint32 index = UINT_MAX;
+  BOOL exists = FALSE;
+  collection_->FindFamilyName(L"Arial", &index, &exists);
+  mswr::ComPtr<IDWriteFontFamily> family;
+  collection_->GetFontFamily(index, &family);
+  family->GetFontCount();
+  EXPECT_EQ(fake_collection_->MessageCount(), 3);
+
+  mswr::ComPtr<IDWriteLocalizedStrings> names;
+  hr = family->GetFamilyNames(&names);
+  EXPECT_EQ(S_OK, hr);
+  EXPECT_EQ(3, fake_collection_->MessageCount());
+}
+
+TEST_F(DWriteFontProxyUnitTest,
+       GetFontFamilyShouldNotCreateFamilyWhenIndexIsInvalid) {
+  HRESULT hr;
+  if (factory == nullptr)
+    return;
+
+  uint32 index = UINT_MAX;
+  BOOL exists = FALSE;
+  hr = collection_->FindFamilyName(L"Arial", &index, &exists);
+  ASSERT_EQ(2, fake_collection_->MessageCount());
+
+  mswr::ComPtr<IDWriteFontFamily> family;
+  hr = collection_->GetFontFamily(1654, &family);
+
+  EXPECT_FALSE(SUCCEEDED(hr));
+  EXPECT_EQ(2, fake_collection_->MessageCount());
+}
+
+TEST_F(DWriteFontProxyUnitTest, LoadingFontFamily) {
+  HRESULT hr;
+  if (factory == nullptr)
+    return;
+
+  uint32 index = UINT_MAX;
+  BOOL exists = FALSE;
+  collection_->FindFamilyName(L"Arial", &index, &exists);
+  mswr::ComPtr<IDWriteFontFamily> family;
+  collection_->GetFontFamily(index, &family);
+  ASSERT_EQ(2, fake_collection_->MessageCount());
+
+  UINT32 font_count = family->GetFontCount();
+  EXPECT_LT(0u, font_count);
+  EXPECT_EQ(3, fake_collection_->MessageCount());
+  EXPECT_EQ(DWriteFontProxyMsg_GetFontFiles::ID,
+            fake_collection_->GetMessage(2)->type());
+  mswr::ComPtr<IDWriteFont> font;
+  hr = family->GetFirstMatchingFont(DWRITE_FONT_WEIGHT_NORMAL,
+                                    DWRITE_FONT_STRETCH_NORMAL,
+                                    DWRITE_FONT_STYLE_NORMAL, &font);
+  EXPECT_EQ(S_OK, hr);
+  EXPECT_EQ(3, fake_collection_->MessageCount());
+  mswr::ComPtr<IDWriteFont> font2;
+  hr = family->GetFont(0, &font2);
+  EXPECT_EQ(S_OK, hr);
+  EXPECT_EQ(3, fake_collection_->MessageCount());
+  mswr::ComPtr<IDWriteFontList> matching_fonts;
+  hr = family->GetMatchingFonts(DWRITE_FONT_WEIGHT_NORMAL,
+                                DWRITE_FONT_STRETCH_NORMAL,
+                                DWRITE_FONT_STYLE_NORMAL, &matching_fonts);
+  EXPECT_EQ(S_OK, hr);
+  EXPECT_EQ(3, fake_collection_->MessageCount());
+  EXPECT_NE(nullptr, matching_fonts.Get());
+}
+
+TEST_F(DWriteFontProxyUnitTest, GetFontFromFontFaceShouldFindFont) {
+  HRESULT hr;
+  if (factory == nullptr)
+    return;
+
+  uint32 index = UINT_MAX;
+  BOOL exists = FALSE;
+  collection_->FindFamilyName(L"Arial", &index, &exists);
+  mswr::ComPtr<IDWriteFontFamily> family;
+  collection_->GetFontFamily(index, &family);
+
+  mswr::ComPtr<IDWriteFont> font;
+  family->GetFirstMatchingFont(DWRITE_FONT_WEIGHT_NORMAL,
+                               DWRITE_FONT_STRETCH_NORMAL,
+                               DWRITE_FONT_STYLE_NORMAL, &font);
+
+  mswr::ComPtr<IDWriteFontFace> font_face;
+  hr = font->CreateFontFace(&font_face);
+  ASSERT_TRUE(SUCCEEDED(hr));
+  ASSERT_EQ(3, fake_collection_->MessageCount());
+
+  mswr::ComPtr<IDWriteFont> found_font;
+  collection_->GetFontFromFontFace(font_face.Get(), &found_font);
+  EXPECT_NE(nullptr, found_font.Get());
+  EXPECT_EQ(3, fake_collection_->MessageCount());
+}
+
+}  // namespace content