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// 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.
#ifndef CONTENT_BROWSER_RENDERER_HOST_DWRITE_FONT_PROXY_MESSAGE_FILTER_WIN_H_
#define CONTENT_BROWSER_RENDERER_HOST_DWRITE_FONT_PROXY_MESSAGE_FILTER_WIN_H_
#include <dwrite.h>
#include <dwrite_2.h>
#include <wrl.h>
#include <set>
#include <utility>
#include <vector>
#include "base/location.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/strings/string16.h"
#include "content/common/content_export.h"
#include "content/common/dwrite_font_proxy.mojom.h"
#include "content/public/browser/browser_message_filter.h"
#include "content/public/browser/browser_thread.h"
namespace service_manager {
struct BindSourceInfo;
}
namespace content {
// Implements a message filter that handles the dwrite font proxy messages.
// If DWrite is enabled, calls into the system font collection to obtain
// results. Otherwise, acts as if the system collection contains no fonts.
class CONTENT_EXPORT DWriteFontProxyImpl : public mojom::DWriteFontProxy {
public:
DWriteFontProxyImpl();
~DWriteFontProxyImpl() override;
static void Create(mojom::DWriteFontProxyRequest request,
const service_manager::BindSourceInfo& source_info);
void SetWindowsFontsPathForTesting(base::string16 path);
protected:
// mojom::DWriteFontProxy:
void FindFamily(const base::string16& family_name,
FindFamilyCallback callback) override;
void GetFamilyCount(GetFamilyCountCallback callback) override;
void GetFamilyNames(uint32_t family_index,
GetFamilyNamesCallback callback) override;
void GetFontFiles(uint32_t family_index,
GetFontFilesCallback callback) override;
void MapCharacters(const base::string16& text,
mojom::DWriteFontStylePtr font_style,
const base::string16& locale_name,
uint32_t reading_direction,
const base::string16& base_family_name,
MapCharactersCallback callback) override;
void InitializeDirectWrite();
private:
bool IsLastResortFallbackFont(uint32_t font_index);
private:
bool direct_write_initialized_ = false;
Microsoft::WRL::ComPtr<IDWriteFontCollection> collection_;
Microsoft::WRL::ComPtr<IDWriteFactory2> factory2_;
Microsoft::WRL::ComPtr<IDWriteFontFallback> font_fallback_;
base::string16 windows_fonts_path_;
// Temp code to help track down crbug.com/561873
std::vector<uint32_t> last_resort_fonts_;
DISALLOW_COPY_AND_ASSIGN(DWriteFontProxyImpl);
};
} // namespace content
#endif // CONTENT_BROWSER_RENDERER_HOST_DWRITE_FONT_PROXY_MESSAGE_FILTER_WIN_H_