The Tor Browser: gfx/skia/trunk/src/ports/SkFontHost_linux.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/ports/SkFontHost_linux.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/ports/SkFontHost_linux.cpp

Sat, 03 Jan 2015 20:18:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Sat, 03 Jan 2015 20:18:00 +0100
branch: TOR_BUG_3246
changeset 7: 129ffea94266
permissions: -rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SkFontHost.h"
 #include "SkFontHost_FreeType_common.h"
 #include "SkFontDescriptor.h"
 #include "SkFontMgr.h"
 #include "SkDescriptor.h"
 #include "SkOSFile.h"
 #include "SkPaint.h"
 #include "SkString.h"
 #include "SkStream.h"
 #include "SkThread.h"
 #include "SkTSearch.h"
 #include "SkTypefaceCache.h"
 #include "SkTArray.h"
 #include <limits>
 #ifndef SK_FONT_FILE_PREFIX
 #    define SK_FONT_FILE_PREFIX "/usr/share/fonts/truetype/"
 #endif
 bool find_name_and_attributes(SkStream* stream, SkString* name,
                               SkTypeface::Style* style, bool* isFixedPitch);
 ///////////////////////////////////////////////////////////////////////////////
 /** The base SkTypeface implementation for the custom font manager. */
 class SkTypeface_Custom : public SkTypeface_FreeType {
 public:
     SkTypeface_Custom(Style style, bool sysFont, bool isFixedPitch, const SkString familyName)
         : INHERITED(style, SkTypefaceCache::NewFontID(), isFixedPitch)
         , fIsSysFont(sysFont), fFamilyName(familyName)
     { }
     bool isSysFont() const { return fIsSysFont; }
     virtual const char* getUniqueString() const = 0;
 protected:
     virtual void onGetFontDescriptor(SkFontDescriptor* desc, bool* isLocal) const SK_OVERRIDE {
         desc->setFamilyName(fFamilyName.c_str());
         desc->setFontFileName(this->getUniqueString());
         *isLocal = !this->isSysFont();
     }
 private:
     bool fIsSysFont;
     SkString fFamilyName;
     typedef SkTypeface_FreeType INHERITED;
 };
 /** The empty SkTypeface implementation for the custom font manager.
  *  Used as the last resort fallback typeface.
  */
 class SkTypeface_Empty : public SkTypeface_Custom {
 public:
     SkTypeface_Empty() : INHERITED(SkTypeface::kNormal, true, false, SkString()) {}
     virtual const char* getUniqueString() const SK_OVERRIDE { return NULL; }
 protected:
     virtual SkStream* onOpenStream(int*) const SK_OVERRIDE { return NULL; }
 private:
     typedef SkTypeface_Custom INHERITED;
 };
 /** The stream SkTypeface implementation for the custom font manager. */
 class SkTypeface_Stream : public SkTypeface_Custom {
 public:
     SkTypeface_Stream(Style style, bool sysFont, SkStream* stream,
                       bool isFixedPitch, const SkString familyName)
         : INHERITED(style, sysFont, isFixedPitch, familyName)
         , fStream(SkRef(stream))
     { }
     virtual const char* getUniqueString() const SK_OVERRIDE { return NULL; }
 protected:
     virtual SkStream* onOpenStream(int* ttcIndex) const SK_OVERRIDE {
         *ttcIndex = 0;
         return SkRef(fStream.get());
     }
 private:
     SkAutoTUnref<SkStream> fStream;
     typedef SkTypeface_Custom INHERITED;
 };
 /** The file SkTypeface implementation for the custom font manager. */
 class SkTypeface_File : public SkTypeface_Custom {
 public:
     SkTypeface_File(Style style, bool sysFont, const char path[],
                     bool isFixedPitch, const SkString familyName)
         : INHERITED(style, sysFont, isFixedPitch, familyName)
         , fPath(path)
     { }
     virtual const char* getUniqueString() const SK_OVERRIDE {
         const char* str = strrchr(fPath.c_str(), '/');
         if (str) {
             str += 1;   // skip the '/'
         }
         return str;
     }
 protected:
     virtual SkStream* onOpenStream(int* ttcIndex) const SK_OVERRIDE {
         *ttcIndex = 0;
         return SkStream::NewFromFile(fPath.c_str());
     }
 private:
     SkString fPath;
     typedef SkTypeface_Custom INHERITED;
 };
 ///////////////////////////////////////////////////////////////////////////////
 /**
  *  SkFontStyleSet_Custom
  *
  *  This class is used by SkFontMgr_Custom to hold SkTypeface_Custom families.
  */
 class SkFontStyleSet_Custom : public SkFontStyleSet {
 public:
     explicit SkFontStyleSet_Custom(const SkString familyName) : fFamilyName(familyName) { }
     virtual int count() SK_OVERRIDE {
         return fStyles.count();
     }
     virtual void getStyle(int index, SkFontStyle* style, SkString* name) SK_OVERRIDE {
         SkASSERT(index < fStyles.count());
         bool bold = fStyles[index]->isBold();
         bool italic = fStyles[index]->isItalic();
         *style = SkFontStyle(bold ? SkFontStyle::kBold_Weight : SkFontStyle::kNormal_Weight,
                              SkFontStyle::kNormal_Width,
                              italic ? SkFontStyle::kItalic_Slant : SkFontStyle::kUpright_Slant);
         name->reset();
     }
     virtual SkTypeface* createTypeface(int index) SK_OVERRIDE {
         SkASSERT(index < fStyles.count());
         return SkRef(fStyles[index].get());
     }
     static int match_score(const SkFontStyle& pattern, const SkFontStyle& candidate) {
         int score = 0;
         score += (pattern.width() - candidate.width()) * 100;
         score += (pattern.isItalic() == candidate.isItalic()) ? 0 : 1000;
         score += pattern.weight() - candidate.weight();
         return score;
     }
     virtual SkTypeface* matchStyle(const SkFontStyle& pattern) SK_OVERRIDE {
         if (0 == fStyles.count()) {
             return NULL;
         }
         SkTypeface_Custom* closest = fStyles[0];
         int minScore = std::numeric_limits<int>::max();
         for (int i = 0; i < fStyles.count(); ++i) {
             bool bold = fStyles[i]->isBold();
             bool italic = fStyles[i]->isItalic();
             SkFontStyle style = SkFontStyle(bold ? SkFontStyle::kBold_Weight
                                                  : SkFontStyle::kNormal_Weight,
                                             SkFontStyle::kNormal_Width,
                                             italic ? SkFontStyle::kItalic_Slant
                                                    : SkFontStyle::kUpright_Slant);
             int score = match_score(pattern, style);
             if (score < minScore) {
                 closest = fStyles[i];
                 minScore = score;
             }
         }
         return SkRef(closest);
     }
 private:
     SkTArray<SkAutoTUnref<SkTypeface_Custom>, true> fStyles;
     SkString fFamilyName;
     void appendTypeface(SkTypeface_Custom* typeface) {
         fStyles.push_back().reset(typeface);
     }
     friend class SkFontMgr_Custom;
 };
 /**
  *  SkFontMgr_Custom
  *
  *  This class is essentially a collection of SkFontStyleSet_Custom,
  *  one SkFontStyleSet_Custom for each family. This class may be modified
  *  to load fonts from any source by changing the initialization.
  */
 class SkFontMgr_Custom : public SkFontMgr {
 public:
     explicit SkFontMgr_Custom(const char* dir) {
         this->load_system_fonts(dir);
     }
 protected:
     virtual int onCountFamilies() const SK_OVERRIDE {
         return fFamilies.count();
     }
     virtual void onGetFamilyName(int index, SkString* familyName) const SK_OVERRIDE {
         SkASSERT(index < fFamilies.count());
         familyName->set(fFamilies[index]->fFamilyName);
     }
     virtual SkFontStyleSet_Custom* onCreateStyleSet(int index) const SK_OVERRIDE {
         SkASSERT(index < fFamilies.count());
         return SkRef(fFamilies[index].get());
     }
     virtual SkFontStyleSet_Custom* onMatchFamily(const char familyName[]) const SK_OVERRIDE {
         for (int i = 0; i < fFamilies.count(); ++i) {
             if (fFamilies[i]->fFamilyName.equals(familyName)) {
                 return SkRef(fFamilies[i].get());
             }
         }
         return NULL;
     }
     virtual SkTypeface* onMatchFamilyStyle(const char familyName[],
                                            const SkFontStyle& fontStyle) const SK_OVERRIDE
     {
         SkAutoTUnref<SkFontStyleSet> sset(this->matchFamily(familyName));
         return sset->matchStyle(fontStyle);
     }
     virtual SkTypeface* onMatchFaceStyle(const SkTypeface* familyMember,
                                          const SkFontStyle& fontStyle) const SK_OVERRIDE
     {
         for (int i = 0; i < fFamilies.count(); ++i) {
             for (int j = 0; j < fFamilies[i]->fStyles.count(); ++j) {
                 if (fFamilies[i]->fStyles[j] == familyMember) {
                     return fFamilies[i]->matchStyle(fontStyle);
                 }
             }
         }
         return NULL;
     }
     virtual SkTypeface* onCreateFromData(SkData* data, int ttcIndex) const SK_OVERRIDE {
         SkAutoTUnref<SkStream> stream(new SkMemoryStream(data));
         return this->createFromStream(stream, ttcIndex);
     }
     virtual SkTypeface* onCreateFromStream(SkStream* stream, int ttcIndex) const SK_OVERRIDE {
         if (NULL == stream || stream->getLength() <= 0) {
             SkDELETE(stream);
             return NULL;
         }
         bool isFixedPitch;
         SkTypeface::Style style;
         SkString name;
         if (find_name_and_attributes(stream, &name, &style, &isFixedPitch)) {
             return SkNEW_ARGS(SkTypeface_Stream, (style, false, stream, isFixedPitch, name));
         } else {
             return NULL;
         }
     }
     virtual SkTypeface* onCreateFromFile(const char path[], int ttcIndex) const SK_OVERRIDE {
         SkAutoTUnref<SkStream> stream(SkStream::NewFromFile(path));
         return stream.get() ? this->createFromStream(stream, ttcIndex) : NULL;
     }
     virtual SkTypeface* onLegacyCreateTypeface(const char familyName[],
                                                unsigned styleBits) const SK_OVERRIDE
     {
         SkTypeface::Style oldStyle = (SkTypeface::Style)styleBits;
         SkFontStyle style = SkFontStyle(oldStyle & SkTypeface::kBold
                                                  ? SkFontStyle::kBold_Weight
                                                  : SkFontStyle::kNormal_Weight,
                                         SkFontStyle::kNormal_Width,
                                         oldStyle & SkTypeface::kItalic
                                                  ? SkFontStyle::kItalic_Slant
                                                  : SkFontStyle::kUpright_Slant);
         SkTypeface* tf = NULL;
         if (NULL != familyName) {
             tf = this->onMatchFamilyStyle(familyName, style);
         }
         if (NULL == tf) {
             tf = gDefaultFamily->matchStyle(style);
         }
         return SkSafeRef(tf);
     }
 private:
     static bool get_name_and_style(const char path[], SkString* name,
                                    SkTypeface::Style* style, bool* isFixedPitch) {
         SkAutoTUnref<SkStream> stream(SkStream::NewFromFile(path));
         if (stream.get()) {
             return find_name_and_attributes(stream, name, style, isFixedPitch);
         } else {
             SkDebugf("---- failed to open <%s> as a font\n", path);
             return false;
         }
     }
     void load_directory_fonts(const SkString& directory) {
         SkOSFile::Iter iter(directory.c_str(), ".ttf");
         SkString name;
         while (iter.next(&name, false)) {
             SkString filename(
                 SkOSPath::SkPathJoin(directory.c_str(), name.c_str()));
             bool isFixedPitch;
             SkString realname;
             SkTypeface::Style style = SkTypeface::kNormal; // avoid uninitialized warning
             if (!get_name_and_style(filename.c_str(), &realname, &style, &isFixedPitch)) {
                 SkDebugf("------ can't load <%s> as a font\n", filename.c_str());
                 continue;
             }
             SkTypeface_Custom* tf = SkNEW_ARGS(SkTypeface_File, (
                                                 style,
                                                 true,  // system-font (cannot delete)
                                                 filename.c_str(),
                                                 isFixedPitch,
                                                 realname));
             SkFontStyleSet_Custom* addTo = this->onMatchFamily(realname.c_str());
             if (NULL == addTo) {
                 addTo = new SkFontStyleSet_Custom(realname);
                 fFamilies.push_back().reset(addTo);
             }
             addTo->appendTypeface(tf);
         }
         SkOSFile::Iter dirIter(directory.c_str());
         while (dirIter.next(&name, true)) {
             if (name.startsWith(".")) {
                 continue;
             }
             SkString dirname(
                 SkOSPath::SkPathJoin(directory.c_str(), name.c_str()));
             load_directory_fonts(dirname);
         }
     }
     void load_system_fonts(const char* dir) {
         SkString baseDirectory(dir);
         load_directory_fonts(baseDirectory);
         if (fFamilies.empty()) {
             SkFontStyleSet_Custom* family = new SkFontStyleSet_Custom(SkString());
             fFamilies.push_back().reset(family);
             family->appendTypeface(SkNEW(SkTypeface_Empty));
         }
         // Try to pick a default font.
         static const char* gDefaultNames[] = {
             "Arial", "Verdana", "Times New Roman", "Droid Sans", NULL
         };
         for (size_t i = 0; i < SK_ARRAY_COUNT(gDefaultNames); ++i) {
             SkFontStyleSet_Custom* set = this->onMatchFamily(gDefaultNames[i]);
             if (NULL == set) {
                 continue;
             }
             SkTypeface* tf = set->matchStyle(SkFontStyle(SkFontStyle::kNormal_Weight,
                                                          SkFontStyle::kNormal_Width,
                                                          SkFontStyle::kUpright_Slant));
             if (NULL == tf) {
                 continue;
             }
             gDefaultFamily = set;
             gDefaultNormal = tf;
             break;
         }
         if (NULL == gDefaultNormal) {
             gDefaultFamily = fFamilies[0];
             gDefaultNormal = gDefaultFamily->fStyles[0];
         }
     }
     SkTArray<SkAutoTUnref<SkFontStyleSet_Custom>, true> fFamilies;
     SkFontStyleSet_Custom* gDefaultFamily;
     SkTypeface* gDefaultNormal;
 };
 SkFontMgr* SkFontMgr::Factory() {
     return new SkFontMgr_Custom(SK_FONT_FILE_PREFIX);
 }

The Tor Browser / annotate

gfx/skia/trunk/src/ports/SkFontHost_linux.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/ports/SkFontHost_linux.cpp