DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 * ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla Corporation code.
 *
 * The Initial Developer of the Original Code is Mozilla Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2009
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Stuart Parmenter <stuart@mozilla.com>
 *   Masayuki Nakano <masayuki@d-toybox.com>
 *   John Daggett <jdaggett@mozilla.com>
 *   Jonathan Kew <jfkthame@gmail.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#ifndef GFX_GDIFONTLIST_H
#define GFX_GDIFONTLIST_H

#include "gfxWindowsPlatform.h"
#include "gfxPlatformFontList.h"
#include "nsGkAtoms.h"

#include <windows.h>

class AutoDC // get the global device context, and auto-release it on destruction
{
public:
    AutoDC() {
        mDC = ::GetDC(NULL);
    }

    ~AutoDC() {
        ::ReleaseDC(NULL, mDC);
    }

    HDC GetDC() {
        return mDC;
    }

private:
    HDC mDC;
};

class AutoSelectFont // select a font into the given DC, and auto-restore
{
public:
    AutoSelectFont(HDC aDC, LOGFONTW *aLogFont)
        : mOwnsFont(false)
    {
        mFont = ::CreateFontIndirectW(aLogFont);
        if (mFont) {
            mOwnsFont = true;
            mDC = aDC;
            mOldFont = (HFONT)::SelectObject(aDC, mFont);
        } else {
            mOldFont = NULL;
        }
    }

    AutoSelectFont(HDC aDC, HFONT aFont)
        : mOwnsFont(false)
    {
        mDC = aDC;
        mFont = aFont;
        mOldFont = (HFONT)::SelectObject(aDC, aFont);
    }

    ~AutoSelectFont() {
        if (mOldFont) {
            ::SelectObject(mDC, mOldFont);
            if (mOwnsFont) {
                ::DeleteObject(mFont);
            }
        }
    }

    bool IsValid() const {
        return mFont != NULL;
    }

    HFONT GetFont() const {
        return mFont;
    }

private:
    HDC    mDC;
    HFONT  mFont;
    HFONT  mOldFont;
    bool mOwnsFont;
};

/**
 * List of different types of fonts we support on Windows.
 * These can generally be lumped in to 3 categories where we have to
 * do special things:  Really old fonts bitmap and vector fonts (device
 * and raster), Type 1 fonts, and TrueType/OpenType fonts.
 * 
 * This list is sorted in order from least prefered to most prefered.
 * We prefer Type1 fonts over OpenType fonts to avoid falling back to
 * things like Arial (opentype) when you ask for Helvetica (type1)
 **/
enum gfxWindowsFontType {
    GFX_FONT_TYPE_UNKNOWN = 0,
    GFX_FONT_TYPE_DEVICE,
    GFX_FONT_TYPE_RASTER,
    GFX_FONT_TYPE_TRUETYPE,
    GFX_FONT_TYPE_PS_OPENTYPE,
    GFX_FONT_TYPE_TT_OPENTYPE,
    GFX_FONT_TYPE_TYPE1
};

// A single member of a font family (i.e. a single face, such as Times Italic)
// represented as a LOGFONT that will resolve to the correct face.
// This replaces FontEntry from gfxWindowsFonts.h/cpp.
class GDIFontEntry : public gfxFontEntry
{
public:
    LPLOGFONTW GetLogFont() { return &mLogFont; }

    nsresult ReadCMAP();

    virtual bool IsSymbolFont();

    void FillLogFont(LOGFONTW *aLogFont, PRUint16 aWeight, gfxFloat aSize,
                     bool aUseCleartype);

    static gfxWindowsFontType DetermineFontType(const NEWTEXTMETRICW& metrics, 
                                                DWORD fontType)
    {
        gfxWindowsFontType feType;
        if (metrics.ntmFlags & NTM_TYPE1)
            feType = GFX_FONT_TYPE_TYPE1;
        else if (metrics.ntmFlags & NTM_PS_OPENTYPE)
            feType = GFX_FONT_TYPE_PS_OPENTYPE;
        else if (metrics.ntmFlags & NTM_TT_OPENTYPE)
            feType = GFX_FONT_TYPE_TT_OPENTYPE;
        else if (fontType == TRUETYPE_FONTTYPE)
            feType = GFX_FONT_TYPE_TRUETYPE;
        else if (fontType == RASTER_FONTTYPE)
            feType = GFX_FONT_TYPE_RASTER;
        else if (fontType == DEVICE_FONTTYPE)
            feType = GFX_FONT_TYPE_DEVICE;
        else
            feType = GFX_FONT_TYPE_UNKNOWN;
        
        return feType;
    }

    bool IsType1() const {
        return (mFontType == GFX_FONT_TYPE_TYPE1);
    }

    bool IsTrueType() const {
        return (mFontType == GFX_FONT_TYPE_TRUETYPE ||
                mFontType == GFX_FONT_TYPE_PS_OPENTYPE ||
                mFontType == GFX_FONT_TYPE_TT_OPENTYPE);
    }

    virtual bool MatchesGenericFamily(const nsACString& aGeneric) const {
        if (aGeneric.IsEmpty()) {
            return true;
        }

        // Japanese 'Mincho' fonts do not belong to FF_MODERN even if
        // they are fixed pitch because they have variable stroke width.
        if (mWindowsFamily == FF_ROMAN && mWindowsPitch & FIXED_PITCH) {
            return aGeneric.EqualsLiteral("monospace");
        }

        // Japanese 'Gothic' fonts do not belong to FF_SWISS even if
        // they are variable pitch because they have constant stroke width.
        if (mWindowsFamily == FF_MODERN && mWindowsPitch & VARIABLE_PITCH) {
            return aGeneric.EqualsLiteral("sans-serif");
        }

        // All other fonts will be grouped correctly using family...
        switch (mWindowsFamily) {
        case FF_DONTCARE:
            return false;
        case FF_ROMAN:
            return aGeneric.EqualsLiteral("serif");
        case FF_SWISS:
            return aGeneric.EqualsLiteral("sans-serif");
        case FF_MODERN:
            return aGeneric.EqualsLiteral("monospace");
        case FF_SCRIPT:
            return aGeneric.EqualsLiteral("cursive");
        case FF_DECORATIVE:
            return aGeneric.EqualsLiteral("fantasy");
        }

        return false;
    }

    virtual bool SupportsLangGroup(nsIAtom* aLangGroup) const {
        if (!aLangGroup || aLangGroup == nsGkAtoms::Unicode) {
            return true;
        }

        PRInt16 bit = -1;

        /* map our langgroup names in to Windows charset bits */
        if (aLangGroup == nsGkAtoms::x_western) {
            bit = ANSI_CHARSET;
        } else if (aLangGroup == nsGkAtoms::Japanese) {
            bit = SHIFTJIS_CHARSET;
        } else if (aLangGroup == nsGkAtoms::ko) {
            bit = HANGEUL_CHARSET;
        } else if (aLangGroup == nsGkAtoms::ko_xxx) {
            bit = JOHAB_CHARSET;
        } else if (aLangGroup == nsGkAtoms::zh_cn) {
            bit = GB2312_CHARSET;
        } else if (aLangGroup == nsGkAtoms::zh_tw) {
            bit = CHINESEBIG5_CHARSET;
        } else if (aLangGroup == nsGkAtoms::el_) {
            bit = GREEK_CHARSET;
        } else if (aLangGroup == nsGkAtoms::tr) {
            bit = TURKISH_CHARSET;
        } else if (aLangGroup == nsGkAtoms::he) {
            bit = HEBREW_CHARSET;
        } else if (aLangGroup == nsGkAtoms::ar) {
            bit = ARABIC_CHARSET;
        } else if (aLangGroup == nsGkAtoms::x_baltic) {
            bit = BALTIC_CHARSET;
        } else if (aLangGroup == nsGkAtoms::x_cyrillic) {
            bit = RUSSIAN_CHARSET;
        } else if (aLangGroup == nsGkAtoms::th) {
            bit = THAI_CHARSET;
        } else if (aLangGroup == nsGkAtoms::x_central_euro) {
            bit = EASTEUROPE_CHARSET;
        } else if (aLangGroup == nsGkAtoms::x_symbol) {
            bit = SYMBOL_CHARSET;
        }

        if (bit != -1) {
            return mCharset.test(bit);
        }

        return false;
    }

    virtual bool SupportsRange(PRUint8 range) {
        return mUnicodeRanges.test(range);
    }

    virtual bool SkipDuringSystemFallback() { 
        return !HasCmapTable(); // explicitly skip non-SFNT fonts
    }

    virtual bool TestCharacterMap(PRUint32 aCh);

    virtual void SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf,
                                     FontListSizes*    aSizes) const;

    // create a font entry for a font with a given name
    static GDIFontEntry* CreateFontEntry(const nsAString& aName,
                                         gfxWindowsFontType aFontType,
                                         bool aItalic,
                                         PRUint16 aWeight, PRInt16 aStretch,
                                         gfxUserFontData* aUserFontData);

    // create a font entry for a font referenced by its fullname
    static GDIFontEntry* LoadLocalFont(const gfxProxyFontEntry &aProxyEntry,
                                       const nsAString& aFullname);

    PRUint8 mWindowsFamily;
    PRUint8 mWindowsPitch;

    gfxWindowsFontType mFontType;
    bool mForceGDI    : 1;

    gfxSparseBitSet mCharset;
    gfxSparseBitSet mUnicodeRanges;

protected:
    friend class gfxWindowsFont;

    GDIFontEntry(const nsAString& aFaceName, gfxWindowsFontType aFontType,
                 bool aItalic, PRUint16 aWeight, PRInt16 aStretch,
                 gfxUserFontData *aUserFontData);

    void InitLogFont(const nsAString& aName, gfxWindowsFontType aFontType);

    virtual gfxFont *CreateFontInstance(const gfxFontStyle *aFontStyle, bool aNeedsBold);

    virtual nsresult GetFontTable(PRUint32 aTableTag,
                                  FallibleTArray<PRUint8>& aBuffer);

    LOGFONTW mLogFont;
};

// a single font family, referencing one or more faces
class GDIFontFamily : public gfxFontFamily
{
public:
    GDIFontFamily(nsAString &aName) :
        gfxFontFamily(aName) {}

    virtual void FindStyleVariations();

private:
    static int CALLBACK FamilyAddStylesProc(const ENUMLOGFONTEXW *lpelfe,
                                            const NEWTEXTMETRICEXW *nmetrics,
                                            DWORD fontType, LPARAM data);
};

class gfxGDIFontList : public gfxPlatformFontList {
public:
    static gfxGDIFontList* PlatformFontList() {
        return static_cast<gfxGDIFontList*>(sPlatformFontList);
    }

    // initialize font lists
    virtual nsresult InitFontList();

    virtual gfxFontEntry* GetDefaultFont(const gfxFontStyle* aStyle, bool& aNeedsBold);

    virtual gfxFontEntry* LookupLocalFont(const gfxProxyFontEntry *aProxyEntry,
                                          const nsAString& aFontName);

    virtual gfxFontEntry* MakePlatformFont(const gfxProxyFontEntry *aProxyEntry,
                                           const PRUint8 *aFontData, PRUint32 aLength);

    virtual bool ResolveFontName(const nsAString& aFontName,
                                   nsAString& aResolvedFontName);

    virtual void SizeOfExcludingThis(nsMallocSizeOfFun aMallocSizeOf,
                                     FontListSizes*    aSizes) const;
    virtual void SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf,
                                     FontListSizes*    aSizes) const;

private:
    friend class gfxWindowsPlatform;

    gfxGDIFontList();

    void InitializeFontEmbeddingProcs();

    nsresult GetFontSubstitutes();

    static int CALLBACK EnumFontFamExProc(ENUMLOGFONTEXW *lpelfe,
                                          NEWTEXTMETRICEXW *lpntme,
                                          DWORD fontType,
                                          LPARAM lParam);

    typedef nsRefPtrHashtable<nsStringHashKey, gfxFontFamily> FontTable;

    FontTable mFontSubstitutes;
    nsTArray<nsString> mNonExistingFonts;
};

#endif /* GFX_GDIFONTLIST_H */