1 // Copyright 2017 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CONTENT_CHILD_CHILD_PROCESS_SANDBOX_SUPPORT_IMPL_LINUX_H_ 6 #define CONTENT_CHILD_CHILD_PROCESS_SANDBOX_SUPPORT_IMPL_LINUX_H_ 7 8 #include <stdint.h> 9 10 #include <map> 11 12 #include "base/macros.h" 13 #include "base/synchronization/lock.h" 14 #include "base/thread_annotations.h" 15 #include "components/services/font/public/cpp/font_loader.h" 16 #include "third_party/blink/public/platform/linux/web_sandbox_support.h" 17 #include "third_party/skia/include/core/SkRefCnt.h" 18 #include "ui/gfx/font_fallback_linux.h" 19 20 namespace blink { 21 struct WebFontRenderStyle; 22 } 23 24 namespace content { 25 26 // Child-process implementation of the Blink interface that sandboxed processes 27 // use to obtain data from the privileged process (browser), which would 28 // otherwise be blocked by the sandbox. 29 class WebSandboxSupportLinux : public blink::WebSandboxSupport { 30 public: 31 explicit WebSandboxSupportLinux(sk_sp<font_service::FontLoader> font_loader); 32 ~WebSandboxSupportLinux() override; 33 34 // |fallback_font| will be filled with a font family which provides glyphs for 35 // the Unicode code point specified by |character|, a UTF-32 character. 36 // |preferred_locale| contains the preferred locale identifier for 37 // |character|. Returns false if the request could not be satisfied. 38 bool GetFallbackFontForCharacter( 39 blink::WebUChar32 character, 40 const char* preferred_locale, 41 gfx::FallbackFontData* fallback_font) override; 42 43 // Matches a font uniquely by postscript name or full font name. Used in 44 // Blink for @font-face { src: local(arg) } matching. Provide full font name 45 // or postscript name as argument font_unique_name in UTF-8. |fallback_font| 46 // contains a filename and fontconfig interface id if a match was found. 47 // Returns false, otherwise. 48 bool MatchFontByPostscriptNameOrFullFontName( 49 const char* font_unique_name, 50 gfx::FallbackFontData* fallback_font) override; 51 52 // Returns rendering settings for a provided font family, size, and style. 53 // |size_and_style| stores the bold setting in its least-significant bit, the 54 // italic setting in its second-least-significant bit, and holds the requested 55 // size in pixels into its remaining bits. 56 void GetWebFontRenderStyleForStrike(const char* family, 57 int size, 58 bool is_bold, 59 bool is_italic, 60 float device_scale_factor, 61 blink::WebFontRenderStyle* out) override; 62 63 private: 64 // Blink calls GetFallbackFontForCharacter frequently, so the results are 65 // cached. The cache is protected by this lock. 66 base::Lock lock_; 67 // Maps unicode chars to their fallback fonts. 68 std::map<int32_t, gfx::FallbackFontData> unicode_font_families_ 69 GUARDED_BY(lock_); 70 71 sk_sp<font_service::FontLoader> font_loader_; 72 73 DISALLOW_COPY_AND_ASSIGN(WebSandboxSupportLinux); 74 }; 75 76 } // namespace content 77 78 #endif // CONTENT_CHILD_CHILD_PROCESS_SANDBOX_SUPPORT_IMPL_LINUX_H_ 79