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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_CHILD_CHILD_PROCESS_SANDBOX_SUPPORT_IMPL_LINUX_H_
#define CONTENT_CHILD_CHILD_PROCESS_SANDBOX_SUPPORT_IMPL_LINUX_H_
#include <stdint.h>
#include <map>
#include "base/synchronization/lock.h"
#include "base/thread_annotations.h"
#include "components/services/font/public/cpp/font_loader.h"
#include "third_party/blink/public/platform/linux/web_sandbox_support.h"
#include "third_party/skia/include/core/SkRefCnt.h"
#include "ui/gfx/font_fallback_linux.h"
namespace blink {
struct WebFontRenderStyle;
}
namespace content {
// Child-process implementation of the Blink interface that sandboxed processes
// use to obtain data from the privileged process (browser), which would
// otherwise be blocked by the sandbox.
class WebSandboxSupportLinux : public blink::WebSandboxSupport {
public:
explicit WebSandboxSupportLinux(sk_sp<font_service::FontLoader> font_loader);
WebSandboxSupportLinux(const WebSandboxSupportLinux&) = delete;
WebSandboxSupportLinux& operator=(const WebSandboxSupportLinux&) = delete;
~WebSandboxSupportLinux() override;
// |fallback_font| will be filled with a font family which provides glyphs for
// the Unicode code point specified by |character|, a UTF-32 character.
// |preferred_locale| contains the preferred locale identifier for
// |character|. Returns false if the request could not be satisfied.
bool GetFallbackFontForCharacter(
blink::WebUChar32 character,
const char* preferred_locale,
gfx::FallbackFontData* fallback_font) override;
// Matches a font uniquely by postscript name or full font name. Used in
// Blink for @font-face { src: local(arg) } matching. Provide full font name
// or postscript name as argument font_unique_name in UTF-8. |fallback_font|
// contains a filename and fontconfig interface id if a match was found.
// Returns false, otherwise.
bool MatchFontByPostscriptNameOrFullFontName(
const char* font_unique_name,
gfx::FallbackFontData* fallback_font) override;
// Returns rendering settings for a provided font family, size, and style.
// |size_and_style| stores the bold setting in its least-significant bit, the
// italic setting in its second-least-significant bit, and holds the requested
// size in pixels into its remaining bits.
void GetWebFontRenderStyleForStrike(const char* family,
int size,
bool is_bold,
bool is_italic,
float device_scale_factor,
blink::WebFontRenderStyle* out) override;
private:
// Blink calls GetFallbackFontForCharacter frequently, so the results are
// cached. The cache is protected by this lock.
base::Lock lock_;
// Maps unicode chars to their fallback fonts.
std::map<int32_t, gfx::FallbackFontData> unicode_font_families_
GUARDED_BY(lock_);
sk_sp<font_service::FontLoader> font_loader_;
};
} // namespace content
#endif // CONTENT_CHILD_CHILD_PROCESS_SANDBOX_SUPPORT_IMPL_LINUX_H_
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