Remove Android FontConfigInterface

src/ports/SkFontConfigInterface_android.cpp

Index: src/ports/SkFontConfigInterface_android.cpp
diff --git a/src/ports/SkFontConfigInterface_android.cpp b/src/ports/SkFontConfigInterface_android.cpp
deleted file mode 100644
index 4e435cd616f4a99395b775742e5c76ba1e8af14c..0000000000000000000000000000000000000000
--- a/src/ports/SkFontConfigInterface_android.cpp
+++ /dev/null
@@ -1,586 +0,0 @@
-
-/*
- * Copyright 2013 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 "SkFontConfigInterface.h"
-#include "SkTypeface_android.h"
-
-#include "SkFontConfigParser_android.h"
-#include "SkFontConfigTypeface.h"
-#include "SkFontHost_FreeType_common.h"
-#include "SkFontMgr.h"
-#include "SkGlyphCache.h"
-#include "SkPaint.h"
-#include "SkString.h"
-#include "SkStream.h"
-#include "SkThread.h"
-#include "SkTypefaceCache.h"
-#include "SkTArray.h"
-#include "SkTDict.h"
-#include "SkTSearch.h"
-
-#include <stdio.h>
-#include <string.h>
-
-#ifndef SK_DEBUG_FONTS
-    #define SK_DEBUG_FONTS 0
-#endif
-
-#if SK_DEBUG_FONTS
-    #define DEBUG_FONT(args) SkDebugf args
-#else
-    #define DEBUG_FONT(args)
-#endif
-
-///////////////////////////////////////////////////////////////////////////////
-
-// For test only.
-static const char* gTestMainConfigFile = NULL;
-static const char* gTestFallbackConfigFile = NULL;
-static const char* gTestFontFilePrefix = NULL;
-
-///////////////////////////////////////////////////////////////////////////////
-
-typedef int32_t FontRecID;
-#define INVALID_FONT_REC_ID -1
-
-typedef int32_t FamilyRecID;
-#define INVALID_FAMILY_REC_ID -1
-
-// used to record our notion of the pre-existing fonts
-struct FontRec {
-    SkAutoTUnref<SkTypeface> fTypeface;
-    SkString fFileName;
-    SkTypeface::Style fStyle;
-    bool fIsValid;
-    FamilyRecID fFamilyRecID;
-};
-
-struct FamilyRec {
-    FamilyRec() {
-        memset(fFontRecID, INVALID_FONT_REC_ID, sizeof(fFontRecID));
-    }
-
-    static const int FONT_STYLE_COUNT = 4;
-    FontRecID fFontRecID[FONT_STYLE_COUNT];
-    bool fIsFallbackFont;
-    SkString fFallbackName;
-    SkPaintOptionsAndroid fPaintOptions;
-};
-
-
-typedef SkTDArray<FamilyRecID> FallbackFontList;
-
-class SkFontConfigInterfaceAndroid : public SkFontConfigInterface {
-public:
-    SkFontConfigInterfaceAndroid(SkTDArray<FontFamily*>& fontFamilies);
-    virtual ~SkFontConfigInterfaceAndroid();
-
-    virtual bool matchFamilyName(const char familyName[],
-                                 SkTypeface::Style requested,
-                                 FontIdentity* outFontIdentifier,
-                                 SkString* outFamilyName,
-                                 SkTypeface::Style* outStyle) SK_OVERRIDE;
-    virtual SkStream* openStream(const FontIdentity&) SK_OVERRIDE;
-
-    // new APIs
-    virtual SkDataTable* getFamilyNames() SK_OVERRIDE;
-    virtual bool matchFamilySet(const char inFamilyName[],
-                                SkString* outFamilyName,
-                                SkTArray<FontIdentity>*) SK_OVERRIDE;
-
-    /**
-     *  Get the family name of the font in the default fallback font list that
-     *  contains the specified chararacter. if no font is found, returns false.
-     */
-    bool getFallbackFamilyNameForChar(SkUnichar uni, const char* lang, SkString* name);
-
-private:
-    void addFallbackFamily(FamilyRecID fontRecID);
-    SkTypeface* getTypefaceForFontRec(FontRecID fontRecID);
-    FallbackFontList* findFallbackFontList(const SkLanguage& lang, bool isOriginal = true);
-
-    SkTArray<FontRec, true> fFonts;
-    SkTArray<FamilyRec, true> fFontFamilies;
-    SkTDict<FamilyRecID> fFamilyNameDict;
-    FamilyRecID fDefaultFamilyRecID;
-
-    // (SkLanguage)<->(fallback chain index) translation
-    SkTDict<FallbackFontList*> fFallbackFontDict;
-    SkTDict<FallbackFontList*> fFallbackFontAliasDict;
-    FallbackFontList fDefaultFallbackList;
-
-    // fallback info for current locale
-    SkString fCachedLocale;
-    FallbackFontList* fLocaleFallbackFontList;
-};
-
-///////////////////////////////////////////////////////////////////////////////
-
-SK_DECLARE_STATIC_MUTEX(gGetSingletonInterfaceMutex);
-static SkFontConfigInterfaceAndroid* getSingletonInterface() {
-    static SkFontConfigInterfaceAndroid* gFontConfigInterface;
-
-    SkAutoMutexAcquire ac(gGetSingletonInterfaceMutex);
-    if (NULL == gFontConfigInterface) {
-        // load info from a configuration file that we can use to populate the
-        // system/fallback font structures
-        SkTDArray<FontFamily*> fontFamilies;
-        if (!gTestMainConfigFile) {
-            SkFontConfigParser::GetFontFamilies(fontFamilies);
-        } else {
-            SkFontConfigParser::GetTestFontFamilies(fontFamilies, gTestMainConfigFile,
-                                                    gTestFallbackConfigFile);
-        }
-
-        gFontConfigInterface = new SkFontConfigInterfaceAndroid(fontFamilies);
-
-        // cleanup the data we received from the parser
-        fontFamilies.deleteAll();
-    }
-    return gFontConfigInterface;
-}
-
-SkFontConfigInterface* SkFontConfigInterface::GetSingletonDirectInterface(SkBaseMutex*) {
-    // Doesn't need passed-in mutex because getSingletonInterface() uses one
-    return getSingletonInterface();
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-static bool has_font(const SkTArray<FontRec, true>& array, const SkString& filename) {
-    for (int i = 0; i < array.count(); i++) {
-        if (array[i].fFileName == filename) {
-            return true;
-        }
-    }
-    return false;
-}
-
-#ifndef SK_FONT_FILE_PREFIX
-    #define SK_FONT_FILE_PREFIX          "/fonts/"
-#endif
-
-static void get_path_for_sys_fonts(SkString* full, const SkString& name) {
-    if (gTestFontFilePrefix) {
-        full->set(gTestFontFilePrefix);
-    } else {
-        full->set(getenv("ANDROID_ROOT"));
-        full->append(SK_FONT_FILE_PREFIX);
-    }
-    full->append(name);
-}
-
-static void insert_into_name_dict(SkTDict<FamilyRecID>& familyNameDict,
-                                  const char* name, FamilyRecID familyRecID) {
-    SkAutoAsciiToLC tolc(name);
-    if (familyNameDict.find(tolc.lc())) {
-        SkDebugf("---- system font attempting to use a the same name [%s] for"
-                 "multiple families. skipping subsequent occurrences", tolc.lc());
-    } else {
-        familyNameDict.set(tolc.lc(), familyRecID);
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-SkFontConfigInterfaceAndroid::SkFontConfigInterfaceAndroid(SkTDArray<FontFamily*>& fontFamilies) :
-        fFonts(fontFamilies.count()),
-        fFontFamilies(fontFamilies.count() / FamilyRec::FONT_STYLE_COUNT),
-        fFamilyNameDict(1024),
-        fDefaultFamilyRecID(INVALID_FAMILY_REC_ID),
-        fFallbackFontDict(128),
-        fFallbackFontAliasDict(128),
-        fLocaleFallbackFontList(NULL) {
-
-    for (int i = 0; i < fontFamilies.count(); ++i) {
-        FontFamily* family = fontFamilies[i];
-
-        // defer initializing the familyRec until we can be sure that at least
-        // one of it's children contains a valid font file
-        FamilyRec* familyRec = NULL;
-        FamilyRecID familyRecID = INVALID_FAMILY_REC_ID;
-
-        for (int j = 0; j < family->fFonts.count(); ++j) {
-            SkString filename;
-            get_path_for_sys_fonts(&filename, family->fFonts[j].fFileName);
-
-            if (has_font(fFonts, filename)) {
-                DEBUG_FONT(("---- system font and fallback font files specify a duplicate "
-                        "font %s, skipping the second occurrence", filename.c_str()));
-            }
-
-            FontRec& fontRec = fFonts.push_back();
-            fontRec.fFileName = filename;
-            fontRec.fStyle = SkTypeface::kNormal;
-            fontRec.fIsValid = false;
-            fontRec.fFamilyRecID = familyRecID;
-
-            const FontRecID fontRecID = fFonts.count() - 1;
-
-            SkAutoTUnref<SkStream> stream(SkStream::NewFromFile(filename.c_str()));
-            if (stream.get() != NULL) {
-                bool isFixedWidth;
-                SkString name;
-                fontRec.fIsValid = SkTypeface_FreeType::ScanFont(stream.get(), 0,
-                                                                 &name, &fontRec.fStyle,
-                                                                 &isFixedWidth);
-            } else {
-                if (!family->fIsFallbackFont) {
-                    SkDebugf("---- failed to open <%s> as a font\n", filename.c_str());
-                }
-            }
-
-            if (fontRec.fIsValid) {
-                DEBUG_FONT(("---- SystemFonts[%d][%d] fallback=%d file=%s",
-                           i, fFonts.count() - 1, family->fIsFallbackFont, filename.c_str()));
-            } else {
-                DEBUG_FONT(("---- SystemFonts[%d][%d] fallback=%d file=%s (INVALID)",
-                           i, fFonts.count() - 1, family->fIsFallbackFont, filename.c_str()));
-                continue;
-            }
-
-            // create a familyRec now that we know that at least one font in
-            // the family is valid
-            if (familyRec == NULL) {
-                familyRec = &fFontFamilies.push_back();
-                familyRecID = fFontFamilies.count() - 1;
-                fontRec.fFamilyRecID = familyRecID;
-
-                familyRec->fIsFallbackFont = family->fIsFallbackFont;
-                familyRec->fPaintOptions = family->fFonts[j].fPaintOptions;
-
-            } else if (familyRec->fPaintOptions != family->fFonts[j].fPaintOptions) {
-                SkDebugf("Every font file within a family must have identical"
-                         "language and variant attributes");
-                sk_throw();
-            }
-
-            // add this font to the current familyRec
-            if (INVALID_FONT_REC_ID != familyRec->fFontRecID[fontRec.fStyle]) {
-                DEBUG_FONT(("Overwriting familyRec for style[%d] old,new:(%d,%d)",
-                            fontRec.fStyle, familyRec->fFontRecID[fontRec.fStyle],
-                            fontRecID));
-            }
-            familyRec->fFontRecID[fontRec.fStyle] = fontRecID;
-        }
-
-        if (familyRec) {
-            if (familyRec->fIsFallbackFont) {
-                // add the font to the appropriate fallback chains and also insert a
-                // unique name into the familyNameDict for internal usage
-                addFallbackFamily(familyRecID);
-            } else {
-                // add the names that map to this family to the dictionary for easy lookup
-                const SkTArray<SkString>& names = family->fNames;
-                if (names.empty()) {
-                    SkDEBUGFAIL("ERROR: non-fallback font with no name");
-                    continue;
-                }
-
-                for (int i = 0; i < names.count(); i++) {
-                    insert_into_name_dict(fFamilyNameDict, names[i].c_str(), familyRecID);
-                }
-            }
-        }
-    }
-
-    DEBUG_FONT(("---- We have %d system fonts", fFonts.count()));
-
-    if (fFontFamilies.count() > 0) {
-        fDefaultFamilyRecID = 0;
-    }
-
-    // scans the default fallback font chain, adding every entry to every other
-    // fallback font chain to which it does not belong. this results in every
-    // language-specific fallback font chain having all of its fallback fonts at
-    // the front of the chain, and everything else at the end.
-    FallbackFontList* fallbackList;
-    SkTDict<FallbackFontList*>::Iter iter(fFallbackFontDict);
-    const char* fallbackLang = iter.next(&fallbackList);
-    while(fallbackLang != NULL) {
-        for (int i = 0; i < fDefaultFallbackList.count(); i++) {
-            FamilyRecID familyRecID = fDefaultFallbackList[i];
-            const SkString& fontLang = fFontFamilies[familyRecID].fPaintOptions.getLanguage().getTag();
-            if (strcmp(fallbackLang, fontLang.c_str()) != 0) {
-                fallbackList->push(familyRecID);
-            }
-        }
-        // move to the next fallback list in the dictionary
-        fallbackLang = iter.next(&fallbackList);
-    }
-}
-
-SkFontConfigInterfaceAndroid::~SkFontConfigInterfaceAndroid() {
-    // iterate through and cleanup fFallbackFontDict
-    SkTDict<FallbackFontList*>::Iter iter(fFallbackFontDict);
-    FallbackFontList* fallbackList;
-    while(iter.next(&fallbackList) != NULL) {
-        SkDELETE(fallbackList);
-    }
-}
-
-void SkFontConfigInterfaceAndroid::addFallbackFamily(FamilyRecID familyRecID) {
-    SkASSERT(familyRecID < fFontFamilies.count());
-    FamilyRec& familyRec = fFontFamilies[familyRecID];
-    SkASSERT(familyRec.fIsFallbackFont);
-
-    // add the fallback family to the name dictionary.  This is
-    // needed by getFallbackFamilyNameForChar() so that fallback
-    // families can be identified by a unique name. The unique
-    // identifier that we've chosen is the familyID in hex (e.g. '0F##fallback').
-    familyRec.fFallbackName.printf("%.2x##fallback", familyRecID);
-    insert_into_name_dict(fFamilyNameDict, familyRec.fFallbackName.c_str(), familyRecID);
-
-    // add to the default fallback list
-    fDefaultFallbackList.push(familyRecID);
-
-    // stop here if it is the default language tag
-    const SkString& languageTag = familyRec.fPaintOptions.getLanguage().getTag();
-    if (languageTag.isEmpty()) {
-        return;
-    }
-
-    // add to the appropriate language's custom fallback list
-    FallbackFontList* customList = NULL;
-    if (!fFallbackFontDict.find(languageTag.c_str(), &customList)) {
-        DEBUG_FONT(("----  Created fallback list for \"%s\"", languageTag.c_str()));
-        customList = SkNEW(FallbackFontList);
-        fFallbackFontDict.set(languageTag.c_str(), customList);
-    }
-    SkASSERT(customList != NULL);
-    customList->push(familyRecID);
-}
-
-
-static FontRecID find_best_style(const FamilyRec& family, SkTypeface::Style style) {
-
-    const FontRecID* fontRecIDs = family.fFontRecID;
-
-    if (fontRecIDs[style] != INVALID_FONT_REC_ID) { // exact match
-        return fontRecIDs[style];
-    }
-    // look for a matching bold
-    style = (SkTypeface::Style)(style ^ SkTypeface::kItalic);
-    if (fontRecIDs[style] != INVALID_FONT_REC_ID) {
-        return fontRecIDs[style];
-    }
-    // look for the plain
-    if (fontRecIDs[SkTypeface::kNormal] != INVALID_FONT_REC_ID) {
-        return fontRecIDs[SkTypeface::kNormal];
-    }
-    // look for anything
-    for (int i = 0; i < FamilyRec::FONT_STYLE_COUNT; i++) {
-        if (fontRecIDs[i] != INVALID_FONT_REC_ID) {
-            return fontRecIDs[i];
-        }
-    }
-    // should never get here, since the fontRecID list should not be empty
-    SkDEBUGFAIL("No valid fonts exist for this family");
-    return -1;
-}
-
-bool SkFontConfigInterfaceAndroid::matchFamilyName(const char familyName[],
-                                                   SkTypeface::Style style,
-                                                   FontIdentity* outFontIdentifier,
-                                                   SkString* outFamilyName,
-                                                   SkTypeface::Style* outStyle) {
-    // clip to legal style bits
-    style = (SkTypeface::Style)(style & SkTypeface::kBoldItalic);
-
-    bool exactNameMatch = false;
-
-    FamilyRecID familyRecID = INVALID_FAMILY_REC_ID;
-    if (NULL != familyName) {
-        SkAutoAsciiToLC tolc(familyName);
-        if (fFamilyNameDict.find(tolc.lc(), &familyRecID)) {
-            exactNameMatch = true;
-        }
-    } else {
-        familyRecID = fDefaultFamilyRecID;
-
-    }
-
-    // If no matching family name is found then return false. This allows clients
-    // to be able to search for other fonts instead of forcing them to use the
-    // default font.
-    if (INVALID_FAMILY_REC_ID == familyRecID) {
-        return false;
-    }
-
-    FontRecID fontRecID = find_best_style(fFontFamilies[familyRecID], style);
-    FontRec& fontRec = fFonts[fontRecID];
-
-    if (NULL != outFontIdentifier) {
-        outFontIdentifier->fID = fontRecID;
-        outFontIdentifier->fTTCIndex = 0;
-        outFontIdentifier->fString.set(fontRec.fFileName);
-//        outFontIdentifier->fStyle = fontRec.fStyle;
-    }
-
-    if (NULL != outFamilyName) {
-        if (exactNameMatch) {
-            outFamilyName->set(familyName);
-        } else {
-            // find familyName from list of names
-            const char* familyName = NULL;
-            SkAssertResult(fFamilyNameDict.findKey(familyRecID, &familyName));
-            SkASSERT(familyName);
-            outFamilyName->set(familyName);
-        }
-    }
-
-    if (NULL != outStyle) {
-        *outStyle = fontRec.fStyle;
-    }
-
-    return true;
-}
-
-SkStream* SkFontConfigInterfaceAndroid::openStream(const FontIdentity& identity) {
-    return SkStream::NewFromFile(identity.fString.c_str());
-}
-
-SkDataTable* SkFontConfigInterfaceAndroid::getFamilyNames() {
-    SkTDArray<const char*> names;
-    SkTDArray<size_t> sizes;
-
-    SkTDict<FamilyRecID>::Iter iter(fFamilyNameDict);
-    const char* familyName = iter.next(NULL);
-    while(familyName != NULL) {
-        *names.append() = familyName;
-        *sizes.append() = strlen(familyName) + 1;
-
-        // move to the next familyName in the dictionary
-        familyName = iter.next(NULL);
-    }
-
-    return SkDataTable::NewCopyArrays((const void*const*)names.begin(),
-                                      sizes.begin(), names.count());
-}
-
-bool SkFontConfigInterfaceAndroid::matchFamilySet(const char inFamilyName[],
-                                                  SkString* outFamilyName,
-                                                  SkTArray<FontIdentity>*) {
-    return false;
-}
-
-static bool find_proc(SkTypeface* face, SkTypeface::Style style, void* ctx) {
-    const FontRecID* fontRecID = (const FontRecID*)ctx;
-    FontRecID currFontRecID = ((FontConfigTypeface*)face)->getIdentity().fID;
-    return currFontRecID == *fontRecID;
-}
-
-SkTypeface* SkFontConfigInterfaceAndroid::getTypefaceForFontRec(FontRecID fontRecID) {
-    FontRec& fontRec = fFonts[fontRecID];
-    SkTypeface* face = fontRec.fTypeface.get();
-    if (!face) {
-        // look for it in the typeface cache
-        face = SkTypefaceCache::FindByProcAndRef(find_proc, &fontRecID);
-
-        // if it is not in the cache then create it
-        if (!face) {
-            const char* familyName = NULL;
-            SkAssertResult(fFamilyNameDict.findKey(fontRec.fFamilyRecID, &familyName));
-            SkASSERT(familyName);
-            face = SkTypeface::CreateFromName(familyName, fontRec.fStyle);
-        }
-
-        // store the result for subsequent lookups
-        fontRec.fTypeface.reset(face);
-    }
-    SkASSERT(face);
-    return face;
-}
-
-bool SkFontConfigInterfaceAndroid::getFallbackFamilyNameForChar(SkUnichar uni,
-                                                                const char* lang,
-                                                                SkString* name) {
-    const SkString locale(lang);
-    if (NULL == fLocaleFallbackFontList || locale != fCachedLocale) {
-        fCachedLocale = locale;
-        fLocaleFallbackFontList = this->findFallbackFontList(locale);
-    }
-    FallbackFontList* fallbackFontList = fLocaleFallbackFontList;
-
-    for (int i = 0; i < fallbackFontList->count(); i++) {
-        FamilyRecID familyRecID = fallbackFontList->getAt(i);
-
-        // if it is not one of the accepted variants then move to the next family
-        int32_t acceptedVariants = SkPaintOptionsAndroid::kDefault_Variant |
-                                   SkPaintOptionsAndroid::kElegant_Variant;
-        if (!(fFontFamilies[familyRecID].fPaintOptions.getFontVariant() & acceptedVariants)) {
-            continue;
-        }
-
-        FontRecID fontRecID = find_best_style(fFontFamilies[familyRecID], SkTypeface::kNormal);
-        SkTypeface* face = this->getTypefaceForFontRec(fontRecID);
-
-        SkPaint paint;
-        paint.setTypeface(face);
-        paint.setTextEncoding(SkPaint::kUTF32_TextEncoding);
-
-        uint16_t glyphID;
-        paint.textToGlyphs(&uni, sizeof(uni), &glyphID);
-        if (glyphID != 0) {
-            name->set(fFontFamilies[familyRecID].fFallbackName);
-            return true;
-        }
-    }
-    return false;
-}
-
-FallbackFontList* SkFontConfigInterfaceAndroid::findFallbackFontList(const SkLanguage& lang,
-                                                                     bool isOriginal) {
-    const SkString& langTag = lang.getTag();
-    if (langTag.isEmpty()) {
-        return &fDefaultFallbackList;
-    }
-
-    FallbackFontList* fallbackFontList;
-    if (fFallbackFontDict.find(langTag.c_str(), langTag.size(), &fallbackFontList) ||
-        fFallbackFontAliasDict.find(langTag.c_str(), langTag.size(), &fallbackFontList)) {
-        return fallbackFontList;
-    }
-
-    // attempt a recursive fuzzy match
-    SkLanguage parent = lang.getParent();
-    fallbackFontList = findFallbackFontList(parent, false);
-
-    // cache the original lang so we don't have to do the recursion again.
-    if (isOriginal) {
-        DEBUG_FONT(("----  Created fallback list alias for \"%s\"", langTag.c_str()));
-        fFallbackFontAliasDict.set(langTag.c_str(), fallbackFontList);
-    }
-    return fallbackFontList;
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-bool SkGetFallbackFamilyNameForChar(SkUnichar uni, const char* lang, SkString* name) {
-    SkFontConfigInterfaceAndroid* fontConfig = getSingletonInterface();
-    return fontConfig->getFallbackFamilyNameForChar(uni, lang, name);
-}
-
-void SkUseTestFontConfigFile(const char* mainconf, const char* fallbackconf,
-                             const char* fontsdir) {
-    gTestMainConfigFile = mainconf;
-    gTestFallbackConfigFile = fallbackconf;
-    gTestFontFilePrefix = fontsdir;
-    SkASSERT(gTestMainConfigFile);
-    SkASSERT(gTestFallbackConfigFile);
-    SkASSERT(gTestFontFilePrefix);
-    SkDEBUGF(("Use Test Config File Main %s, Fallback %s, Font Dir %s",
-              gTestMainConfigFile, gTestFallbackConfigFile, gTestFontFilePrefix));
-}
-
-void SkGetTestFontConfiguration(const char** mainconf, const char** fallbackconf,
-                                const char** fontsdir) {
-    *mainconf = gTestMainConfigFile;
-    *fallbackconf = gTestFallbackConfigFile;
-    *fontsdir = gTestFontFilePrefix;
-}