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FontFactory.cpp

/*
 *  FontFactory.cpp
 *  testICU
 *
 *   Authors:
 *     fred
 *     bulia byak <buliabyak@users.sf.net>
 *
 */

#define PANGO_ENABLE_ENGINE

#include "FontFactory.h"
#include <libnrtype/font-instance.h>

#include <glibmm.h>


#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include <glib/gmem.h>
#include <glibmm/i18n.h> // _()

/* Freetype2 */
# include <pango/pangoft2.h>


// need to avoid using the size field
size_t font_descr_hash::operator()( PangoFontDescription *const &x) const {
    int h = 0;
    h *= 1128467;
    char const *theF = pango_font_description_get_family(x);
    h += (theF)?g_str_hash(theF):0;
    h *= 1128467;
    h += (int)pango_font_description_get_style(x);
    h *= 1128467;
    h += (int)pango_font_description_get_variant(x);
    h *= 1128467;
    h += (int)pango_font_description_get_weight(x);
    h *= 1128467;
    h += (int)pango_font_description_get_stretch(x);
    return h;
}
bool  font_descr_equal::operator()( PangoFontDescription *const&a, PangoFontDescription *const &b) {
    //if ( pango_font_description_equal(a,b) ) return true;
    char const *fa = pango_font_description_get_family(a);
    char const *fb = pango_font_description_get_family(b);
    if ( ( fa && fb == NULL ) || ( fb && fa == NULL ) ) return false;
    if ( fa && fb && strcmp(fa,fb) != 0 ) return false;
    if ( pango_font_description_get_style(a) != pango_font_description_get_style(b) ) return false;
    if ( pango_font_description_get_variant(a) != pango_font_description_get_variant(b) ) return false;
    if ( pango_font_description_get_weight(a) != pango_font_description_get_weight(b) ) return false;
    if ( pango_font_description_get_stretch(a) != pango_font_description_get_stretch(b) ) return false;
    return true;
}

/////////////////// helper functions

/**
 * A wrapper for strcasestr that also provides an implementation for Win32.
 */
static bool
ink_strstr(char const *haystack, char const *pneedle)
{
    // windows has no strcasestr implementation, so here is ours...
    // stolen from nmap
    /* FIXME: This is broken for e.g. ink_strstr("aab", "ab").  Report to nmap.
     *
     * Also, suggest use of g_ascii_todown instead of buffer stuff, and g_ascii_tolower instead
     * of tolower.  Given that haystack is a font name (i.e. fairly short), it should be ok to
     * do g_ascii_strdown on both haystack and pneedle, and do normal strstr.
     *
     * Rather than fixing in inkscape, consider getting rid of this routine, instead using
     * strdown and plain strstr at caller.  We have control over the needle values, so we can
     * modify the callers rather than calling strdown there.
     */
    char buf[512];
    register char const *p;
    char *needle, *q, *foundto;
    if (!*pneedle) return true;
    if (!haystack) return false;

    needle = buf;
    p = pneedle; q = needle;
    while ((*q++ = tolower(*p++)))
        ;
    p = haystack - 1; foundto = needle;
    while (*++p) {
        if (tolower(*p) == *foundto) {
            if (!*++foundto) {
                /* Yeah, we found it */
                return true;
            }
        } else foundto = needle;
    }
    return false;
}

/**
 * Regular fonts are 'Regular', 'Roman', 'Normal', or 'Plain'
 */
// FIXME: make this UTF8, add non-English style names
static bool
is_regular(char const *s)
{
    if (ink_strstr(s, "Regular")) return true;
    if (ink_strstr(s, "Roman")) return true;
    if (ink_strstr(s, "Normal")) return true;
    if (ink_strstr(s, "Plain")) return true;
    return false;
}

/**
 * Non-bold fonts are 'Medium' or 'Book'
 */
static bool
is_nonbold(char const *s)
{
    if (ink_strstr(s, "Medium")) return true;
    if (ink_strstr(s, "Book")) return true;
    return false;
}

/**
 * Italic fonts are 'Italic', 'Oblique', or 'Slanted'
 */
static bool
is_italic(char const *s)
{
    if (ink_strstr(s, "Italic")) return true;
    if (ink_strstr(s, "Oblique")) return true;
    if (ink_strstr(s, "Slanted")) return true;
    return false;
}

/**
 * Bold fonts are 'Bold'
 */
static bool
is_bold(char const *s)
{
    if (ink_strstr(s, "Bold")) return true;
    return false;
}

/**
 * Caps fonts are 'Caps'
 */
static bool
is_caps(char const *s)
{
    if (ink_strstr(s, "Caps")) return true;
    return false;
}

#if 0 /* FIXME: These are all unused.  Please delete them or use them (presumably in
* style_name_compare). */
/**
 * Monospaced fonts are 'Mono'
 */
static bool
is_mono(char const *s)
{
    if (ink_strstr(s, "Mono")) return true;
    return false;
}

/**
 * Rounded fonts are 'Round'
 */
static bool
is_round(char const *s)
{
    if (ink_strstr(s, "Round")) return true;
    return false;
}

/**
 * Outline fonts are 'Outline'
 */
static bool
is_outline(char const *s)
{
    if (ink_strstr(s, "Outline")) return true;
    return false;
}

/**
 * Swash fonts are 'Swash'
 */
static bool
is_swash(char const *s)
{
    if (ink_strstr(s, "Swash")) return true;
    return false;
}
#endif

/**
 * Determines if two style names match.  This allows us to match
 * based on the type of style rather than simply doing string matching,
 * because for instance 'Plain' and 'Normal' mean the same thing.
 *
 * Q:  Shouldn't this include the other tests such as is_outline, etc.?
 * Q:  Is there a problem with strcasecmp on Win32?  Should it use stricmp?
 */
int
style_name_compare(char const *aa, char const *bb)
{
    char const *a = (char const *) aa;
    char const *b = (char const *) bb;

    if (is_regular(a) && !is_regular(b)) return -1;
    if (is_regular(b) && !is_regular(a)) return 1;

    if (is_bold(a) && !is_bold(b)) return 1;
    if (is_bold(b) && !is_bold(a)) return -1;

    if (is_italic(a) && !is_italic(b)) return 1;
    if (is_italic(b) && !is_italic(a)) return -1;

    if (is_nonbold(a) && !is_nonbold(b)) return 1;
    if (is_nonbold(b) && !is_nonbold(a)) return -1;

    if (is_caps(a) && !is_caps(b)) return 1;
    if (is_caps(b) && !is_caps(a)) return -1;

    return strcasecmp(a, b);
}

/*
 defined but not used:

static int
style_record_compare(void const *aa, void const *bb)
{
    NRStyleRecord const *a = (NRStyleRecord const *) aa;
    NRStyleRecord const *b = (NRStyleRecord const *) bb;

    return (style_name_compare(a->name, b->name));
}

static void font_factory_name_list_destructor(NRNameList *list)
{
    for (unsigned int i = 0; i < list->length; i++)
        g_free(list->names[i]);
    if ( list->names ) g_free(list->names);
}

static void font_factory_style_list_destructor(NRStyleList *list)
{
    for (unsigned int i = 0; i < list->length; i++) {
        g_free((void *) (list->records)[i].name);
        g_free((void *) (list->records)[i].descr);
    }
    if ( list->records ) g_free(list->records);
}
*/

/**
 * On Win32 performs a stricmp(a,b), otherwise does a strcasecmp(a,b)
 */
int
family_name_compare(char const *a, char const *b)
{
#ifndef WIN32
    return strcasecmp((*((char const **) a)), (*((char const **) b)));
#else
    return stricmp((*((char const **) a)), (*((char const **) b)));
#endif
}

void noop(...) {}
//#define PANGO_DEBUG g_print
#define PANGO_DEBUG noop



///////////////////// FontFactory
#ifndef USE_PANGO_WIN32
// the substitute function to tell fontconfig to enforce outline fonts
void FactorySubstituteFunc(FcPattern *pattern,gpointer /*data*/)
{
    FcPatternAddBool(pattern, "FC_OUTLINE",FcTrue);
    //char *fam = NULL;
    //FcPatternGetString(pattern, "FC_FAMILY",0, &fam);
    //printf("subst_f on %s\n",fam);
}
#endif


font_factory *font_factory::lUsine = NULL;

font_factory *font_factory::Default(void)
{
    if ( lUsine == NULL ) lUsine = new font_factory;
    return lUsine;
}

font_factory::font_factory(void)
{
    fontSize = 512;
    nbEnt = 0;
    maxEnt = 32;
    ents = (font_entry*)g_malloc(maxEnt*sizeof(font_entry));

#ifdef USE_PANGO_WIN32
    hScreenDC = pango_win32_get_dc();
    fontServer = pango_win32_font_map_for_display();
    fontContext = pango_win32_get_context();
    pangoFontCache = pango_win32_font_map_get_font_cache(fontServer);
#else
    fontServer = pango_ft2_font_map_new();
    pango_ft2_font_map_set_resolution((PangoFT2FontMap*)fontServer, 72, 72);
    fontContext = pango_ft2_font_map_create_context((PangoFT2FontMap*)fontServer);
    pango_ft2_font_map_set_default_substitute((PangoFT2FontMap*)fontServer,FactorySubstituteFunc,this,NULL);
#endif
}

font_factory::~font_factory(void)
{
    for (int i = 0;i < nbEnt;i++) ents[i].f->Unref();
    if ( ents ) g_free(ents);

    g_object_unref(fontServer);
#ifdef USE_PANGO_WIN32
    pango_win32_shutdown_display();
#else
    //pango_ft2_shutdown_display();
#endif
    //g_object_unref(fontContext);

    // Delete the pango font pointers in the string to instance map
    PangoStringToDescrMap::iterator it = fontInstanceMap.begin();
    while (it != fontInstanceMap.end()) {
        pango_font_description_free((*it).second);
        it++;
    }
}


Glib::ustring font_factory::ConstructFontSpecification(PangoFontDescription *font)
{
    Glib::ustring pangoString;

    g_assert(font);

    if (font) {
        // Once the format for the font specification is decided, it must be
        // kept.. if it is absolutely necessary to change it, the attribute
        // it is written to needs to have a new version so the legacy files
        // can be read.

        PangoFontDescription *copy = pango_font_description_copy(font);

        pango_font_description_unset_fields (copy, PANGO_FONT_MASK_SIZE);
        pangoString = Glib::ustring(pango_font_description_to_string(copy));

        pango_font_description_free(copy);

    }

    return pangoString;
}

Glib::ustring font_factory::ConstructFontSpecification(font_instance *font)
{
    Glib::ustring pangoString;

    g_assert(font);

    if (font) {
        pangoString = ConstructFontSpecification(font->descr);
    }

    return pangoString;
}

Glib::ustring font_factory::GetUIFamilyString(PangoFontDescription const *fontDescr)
{
    Glib::ustring family;

    g_assert(fontDescr);

    if (fontDescr) {
        // For now, keep it as family name taken from pango
        family = pango_font_description_get_family(fontDescr);
    }

    return family;
}

Glib::ustring font_factory::GetUIStyleString(PangoFontDescription const *fontDescr)
{
    Glib::ustring style;

    g_assert(fontDescr);

    if (fontDescr) {
        PangoFontDescription *fontDescrCopy = pango_font_description_copy(fontDescr);

        pango_font_description_unset_fields(fontDescrCopy, PANGO_FONT_MASK_FAMILY);
        pango_font_description_unset_fields(fontDescrCopy, PANGO_FONT_MASK_SIZE);

        // For now, keep it as style name taken from pango
        style = pango_font_description_to_string(fontDescrCopy);

        pango_font_description_free(fontDescrCopy);
    }

    return style;
}

Glib::ustring font_factory::ReplaceFontSpecificationFamily(const Glib::ustring & fontSpec, const Glib::ustring & newFamily)
{
    Glib::ustring newFontSpec;

    // Although we are using the string from pango_font_description_to_string for the
    // font specification, we definitely cannot just set the new family in the
    // PangoFontDescription structure and ask for a new string.  This is because
    // what constitutes a "family" in our own UI may be different from how Pango
    // sees it.

    // Find the PangoFontDescription associated to this fontSpec
    PangoStringToDescrMap::iterator it = fontInstanceMap.find(fontSpec);

    if (it != fontInstanceMap.end()) {
        PangoFontDescription *descr = pango_font_description_copy((*it).second);

        // Grab the UI Family string from the descr
        Glib::ustring uiFamily = GetUIFamilyString(descr);

        // Replace the UI Family name with the new family name
        std::size_t found = fontSpec.find(uiFamily);
        if (found != Glib::ustring::npos) {
            newFontSpec = fontSpec;
            newFontSpec.erase(found, uiFamily.size());
            newFontSpec.insert(found, newFamily);

            // If the new font specification does not exist in the reference maps,
            // search for the next best match for the faces in that style
            it = fontInstanceMap.find(newFontSpec);
            if (it == fontInstanceMap.end()) {

                PangoFontDescription *newFontDescr = pango_font_description_from_string(newFontSpec.c_str());

                PangoFontDescription *bestMatchForNewDescr = NULL;
                Glib::ustring bestMatchFontDescription;

                bool setFirstFamilyMatch = false;
                for (it = fontInstanceMap.begin(); it != fontInstanceMap.end(); it++) {

                    Glib::ustring currentFontSpec = (*it).first;

                    // Save some time by only looking at the right family
                    if (currentFontSpec.find(newFamily) != Glib::ustring::npos) {
                        if (!setFirstFamilyMatch) {
                              // This ensures that the closest match is at least within the correct
                              // family rather than the first font in the list
                            bestMatchForNewDescr = pango_font_description_copy((*it).second);
                            bestMatchFontDescription = currentFontSpec;
                            setFirstFamilyMatch = true;
                        } else {
                            // Get the font description that corresponds, and
                            // then see if we've found a better match
                            PangoFontDescription *possibleMatch = pango_font_description_copy((*it).second);

                            if (pango_font_description_better_match(
                                    newFontDescr, bestMatchForNewDescr, possibleMatch)) {

                                pango_font_description_free(bestMatchForNewDescr);
                                bestMatchForNewDescr = possibleMatch;
                                bestMatchFontDescription = currentFontSpec;
                            } else {
                                pango_font_description_free(possibleMatch);
                            }
                        }
                    }
                }

                newFontSpec = bestMatchFontDescription;

                pango_font_description_free(newFontDescr);
                pango_font_description_free(bestMatchForNewDescr);
            }
        }

        pango_font_description_free(descr);
    }

    return newFontSpec;
}

/**
    apply style property to the given font
    @param fontSpec the given font
    @param turnOn true to set italic style
    @return the changed fontspec, if the property can not be set return an empty string
*/
Glib::ustring font_factory::FontSpecificationSetItalic(const Glib::ustring & fontSpec, bool turnOn)
{
    Glib::ustring newFontSpec;

    // Find the PangoFontDesecription that goes with this font specification string
    PangoStringToDescrMap::iterator it = fontInstanceMap.find(fontSpec);

    if (it != fontInstanceMap.end()) {
        // If we did find one, make a copy and set/unset the italic as needed
        PangoFontDescription *descr = pango_font_description_copy((*it).second);

        PangoStyle style;
        if (turnOn) {
            style = PANGO_STYLE_ITALIC;
        } else {
            style = PANGO_STYLE_NORMAL;
        }
        pango_font_description_set_style(descr, style);

        newFontSpec = ConstructFontSpecification(descr);
        if (fontInstanceMap.find(newFontSpec) == fontInstanceMap.end()) {
            if(turnOn) {
                // there is no PANGO_STYLE_ITALIC let's test for PANGO_STYLE_OBLIQUE
                style = PANGO_STYLE_OBLIQUE;
                pango_font_description_set_style(descr, style);

                newFontSpec = ConstructFontSpecification(descr);
                if (fontInstanceMap.find(newFontSpec) == fontInstanceMap.end()) {
                    // If the new font does not have even an oblique face, don't
                    // allow italics to be set!
                    newFontSpec = Glib::ustring("");
                }

            } else {
                // If the new font does not have an italic face, don't
                // allow italics to be set!
                newFontSpec = Glib::ustring("");
            }
        }

        pango_font_description_free(descr);
    }

    return newFontSpec;
}

/**
    apply width property to the given font
    @param fontSpec the given font
    @param turnOn true to set bold
    @return the changed fontspec, if the property can not be set return an empty string
*/
Glib::ustring font_factory::FontSpecificationSetBold(const Glib::ustring & fontSpec, bool turnOn)
{
    Glib::ustring newFontSpec;

    // Find the PangoFontDesecription that goes with this font specification string
    PangoStringToDescrMap::iterator it = fontInstanceMap.find(fontSpec);

    if (it != fontInstanceMap.end()) {
        // If we did find one, make a copy and set/unset the bold as needed
        PangoFontDescription *descr = pango_font_description_copy((*it).second);

        PangoWeight weight;
        if (turnOn) {
            weight = PANGO_WEIGHT_BOLD;
        } else {
            weight = PANGO_WEIGHT_NORMAL;
        }
        pango_font_description_set_weight(descr, weight);

        newFontSpec = ConstructFontSpecification(descr);
        if (fontInstanceMap.find(newFontSpec) == fontInstanceMap.end()) {
            // If the new font does not have a bold face, don't
            // allow bold to be set!
            newFontSpec = Glib::ustring("");
        }

        pango_font_description_free(descr);
    }

    return newFontSpec;
}

/////

static bool StyleNameCompareInternal(Glib::ustring style1, Glib::ustring style2)
{
    return (style_name_compare(style1.c_str(), style2.c_str()) < 0);
}

void font_factory::GetUIFamiliesAndStyles(FamilyToStylesMap *map)
{
    g_assert(map);

    if (map) {

        // Gather the family names as listed by Pango
        PangoFontFamily**  families = NULL;
        int numFamilies = 0;
        pango_font_map_list_families(fontServer, &families, &numFamilies);

        for (int currentFamily=0; currentFamily < numFamilies; currentFamily++) {

            // Gather the styles for this family
            PangoFontFace** faces = NULL;
            int numFaces = 0;
            pango_font_family_list_faces(families[currentFamily], &faces, &numFaces);

            for (int currentFace=0; currentFace < numFaces; currentFace++) {

                // If the face has a name, describe it, and then use the
                // description to get the UI family and face strings

                if (pango_font_face_get_face_name(faces[currentFace]) == NULL) {
                    continue;
                }

                PangoFontDescription *faceDescr = pango_font_face_describe(faces[currentFace]);
                if (faceDescr) {
                    Glib::ustring familyUIName = GetUIFamilyString(faceDescr);
                    Glib::ustring styleUIName = GetUIStyleString(faceDescr);

                    if (!familyUIName.empty() && !styleUIName.empty()) {
                        // Find the right place to put the style information, adding
                        // a map entry for the family name if it doesn't yet exist

                        FamilyToStylesMap::iterator iter = map->find(familyUIName);

                        if (iter == map->end()) {
                            map->insert(std::make_pair(familyUIName, std::list<Glib::ustring>()));
                        }

                        // Insert into the style list and save the info in the reference maps
                        // only if the style does not yet exist

                        bool exists = false;
                        std::list<Glib::ustring> &styleList = (*map)[familyUIName];

                        for (std::list<Glib::ustring>::iterator it=styleList.begin();
                                 it != styleList.end();
                                 it++) {
                            if (*it == styleUIName) {
                                exists = true;
                                break;
                            }
                        }

                        if (!exists) {
                            styleList.push_back(styleUIName);

                            // Add the string info needed in the reference maps
                            fontStringMap.insert(
                                    std::make_pair(
                                            Glib::ustring(familyUIName) + Glib::ustring(styleUIName),
                                            ConstructFontSpecification(faceDescr)));
                            fontInstanceMap.insert(
                                    std::make_pair(ConstructFontSpecification(faceDescr), faceDescr));
                        } else {
                            pango_font_description_free(faceDescr);
                        }
                    } else {
                        pango_font_description_free(faceDescr);
                    }
                }
            }
        }

        // Sort the style lists
        for (FamilyToStylesMap::iterator iter = map->begin() ; iter != map->end(); iter++) {
            (*iter).second.sort(StyleNameCompareInternal);
        }
    }
}

font_instance* font_factory::FaceFromStyle(SPStyle const *style)
{
    font_instance *font = NULL;

    g_assert(style);

    if (style) {
        //  First try to use the font specification if it is set
        if (style->text->font_specification.set
            && style->text->font_specification.value
            && *style->text->font_specification.value) {

            font = FaceFromFontSpecification(style->text->font_specification.value);
        }

        // If that failed, try using the CSS information in the style
        if (!font) {
            font = Face(style->text->font_family.value, font_style_to_pos(*style));
        }
    }

    return font;
}

font_instance *font_factory::FaceFromDescr(char const *family, char const *style)
{
    PangoFontDescription *temp_descr = pango_font_description_from_string(style);
    pango_font_description_set_family(temp_descr,family);
    font_instance *res = Face(temp_descr);
    pango_font_description_free(temp_descr);
    return res;
}

font_instance* font_factory::FaceFromUIStrings(char const *uiFamily, char const *uiStyle)
{
    font_instance *fontInstance = NULL;

    g_assert(uiFamily && uiStyle);
    if (uiFamily && uiStyle) {
        Glib::ustring uiString = Glib::ustring(uiFamily) + Glib::ustring(uiStyle);

        UIStringToPangoStringMap::iterator uiToPangoIter = fontStringMap.find(uiString);

        if (uiToPangoIter != fontStringMap.end ()) {
            PangoStringToDescrMap::iterator pangoToDescrIter = fontInstanceMap.find((*uiToPangoIter).second);
            if (pangoToDescrIter != fontInstanceMap.end()) {
                // We found the pango description - now we can make a font_instance
                PangoFontDescription *tempDescr = pango_font_description_copy((*pangoToDescrIter).second);
                fontInstance = Face(tempDescr);
                pango_font_description_free(tempDescr);
            }
        }
    }

    return fontInstance;
}

font_instance* font_factory::FaceFromPangoString(char const *pangoString)
{
    font_instance *fontInstance = NULL;

    g_assert(pangoString);

    if (pangoString) {
        PangoFontDescription *descr = NULL;

        // First attempt to find the font specification in the reference map
        PangoStringToDescrMap::iterator it = fontInstanceMap.find(Glib::ustring(pangoString));
        if (it != fontInstanceMap.end()) {
            descr = pango_font_description_copy((*it).second);
        }

        // Or create a font description from the string - this may fail or
        // produce unexpected results if the string does not have a good format
        if (!descr) {
            descr = pango_font_description_from_string(pangoString);
        }

        if (descr && (pango_font_description_get_family(descr) != NULL)) {
            fontInstance = Face(descr);
        }

        if (descr) {
            pango_font_description_free(descr);
        }
    }

    return fontInstance;
}

font_instance* font_factory::FaceFromFontSpecification(char const *fontSpecification)
{
    font_instance *font = NULL;

    g_assert(fontSpecification);

    if (fontSpecification) {
        // How the string is used to reconstruct a font depends on how it
        // was constructed in ConstructFontSpecification.  As it stands,
        // the font specification is a pango-created string
        font = FaceFromPangoString(fontSpecification);
    }

    return font;
}



font_instance *font_factory::Face(PangoFontDescription *descr, bool canFail)
{
#ifdef USE_PANGO_WIN32
    // damn Pango fudges the size, so we need to unfudge. See source of pango_win32_font_map_init()
    pango_font_description_set_size(descr, (int) (fontSize*PANGO_SCALE*72/GetDeviceCaps(pango_win32_get_dc(),LOGPIXELSY))); // mandatory huge size (hinting workaround)
#else
    pango_font_description_set_size(descr, (int) (fontSize*PANGO_SCALE)); // mandatory huge size (hinting workaround)
#endif

    font_instance *res = NULL;

    if ( loadedFaces.find(descr) == loadedFaces.end() ) {
        // not yet loaded
        PangoFont *nFace = NULL;

        // workaround for bug #1025565.
        // fonts without families blow up Pango.
        if (pango_font_description_get_family(descr) != NULL) {
            nFace = pango_font_map_load_font(fontServer,fontContext,descr);
        }
        else {
            g_warning(_("Ignoring font without family that will crash Pango"));
        }

        if ( nFace ) {
            // duplicate FcPattern, the hard way
            res = new font_instance();
            // store the descr of the font we asked for, since this is the key where we intend to put the font_instance at
            // in the hash_map.  the descr of the returned pangofont may differ from what was asked, so we don't know (at this
            // point) whether loadedFaces[that_descr] is free or not (and overwriting an entry will bring deallocation problems)
            res->descr = pango_font_description_copy(descr);
            res->daddy = this;
            res->InstallFace(nFace);
            if ( res->pFont == NULL ) {
                // failed to install face -> bitmap font
                // printf("face failed\n");
                res->daddy = NULL;
                delete res;
                res = NULL;
                if ( canFail ) {
                    char *tc = pango_font_description_to_string(descr);
                    PANGO_DEBUG("falling back from %s to Sans because InstallFace failed\n",tc);
                    g_free(tc);
                    pango_font_description_set_family(descr,"Sans");
                    res = Face(descr,false);
                }
            } else {
                loadedFaces[res->descr]=res;
                res->Ref();
                AddInCache(res);
            }
        } else {
            // no match
            if ( canFail ) {
                PANGO_DEBUG("falling back to Sans\n");
                descr = pango_font_description_new();
                pango_font_description_set_family(descr,"Sans");
                res = Face(descr,false);
                pango_font_description_free(descr);
            }
        }
    } else {
        // already here
        res = loadedFaces[descr];
        res->Ref();
        AddInCache(res);
    }
    if(res)
      res->InitTheFace();
    return res;
}

font_instance *font_factory::Face(char const *family, int variant, int style, int weight, int stretch, int /*size*/, int /*spacing*/)
{
    PangoFontDescription *temp_descr = pango_font_description_new();
    pango_font_description_set_family(temp_descr,family);
    pango_font_description_set_weight(temp_descr,(PangoWeight)weight);
    pango_font_description_set_stretch(temp_descr,(PangoStretch)stretch);
    pango_font_description_set_style(temp_descr,(PangoStyle)style);
    pango_font_description_set_variant(temp_descr,(PangoVariant)variant);
    font_instance *res = Face(temp_descr);
    pango_font_description_free(temp_descr);
    return res;
}

font_instance *font_factory::Face(char const *family, NRTypePosDef apos)
{
    PangoFontDescription *temp_descr = pango_font_description_new();

    pango_font_description_set_family(temp_descr, family);

    if ( apos.variant == NR_POS_VARIANT_SMALLCAPS ) {
        pango_font_description_set_variant(temp_descr, PANGO_VARIANT_SMALL_CAPS);
    } else {
        pango_font_description_set_variant(temp_descr, PANGO_VARIANT_NORMAL);
    }

    if ( apos.italic ) {
        pango_font_description_set_style(temp_descr, PANGO_STYLE_ITALIC);
    } else if ( apos.oblique ) {
        pango_font_description_set_style(temp_descr, PANGO_STYLE_OBLIQUE);
    } else {
        pango_font_description_set_style(temp_descr, PANGO_STYLE_NORMAL);
    }

    if ( apos.weight <= NR_POS_WEIGHT_ULTRA_LIGHT ) {
        pango_font_description_set_weight(temp_descr, PANGO_WEIGHT_ULTRALIGHT);
    } else if ( apos.weight <= NR_POS_WEIGHT_LIGHT ) {
        pango_font_description_set_weight(temp_descr, PANGO_WEIGHT_LIGHT);
    } else if ( apos.weight <= NR_POS_WEIGHT_NORMAL ) {
        pango_font_description_set_weight(temp_descr, PANGO_WEIGHT_NORMAL);
    } else if ( apos.weight <= NR_POS_WEIGHT_BOLD ) {
        pango_font_description_set_weight(temp_descr, PANGO_WEIGHT_BOLD);
    } else if ( apos.weight <= NR_POS_WEIGHT_ULTRA_BOLD ) {
        pango_font_description_set_weight(temp_descr, PANGO_WEIGHT_ULTRABOLD);
    } else {
        pango_font_description_set_weight(temp_descr, PANGO_WEIGHT_HEAVY);
    }

    if ( apos.stretch <= NR_POS_STRETCH_ULTRA_CONDENSED ) {
        pango_font_description_set_stretch(temp_descr, PANGO_STRETCH_EXTRA_CONDENSED);
    } else if ( apos.stretch <= NR_POS_STRETCH_CONDENSED ) {
        pango_font_description_set_stretch(temp_descr, PANGO_STRETCH_CONDENSED);
    } else if ( apos.stretch <= NR_POS_STRETCH_SEMI_CONDENSED ) {
        pango_font_description_set_stretch(temp_descr, PANGO_STRETCH_SEMI_CONDENSED);
    } else if ( apos.stretch <= NR_POS_WEIGHT_NORMAL ) {
        pango_font_description_set_stretch(temp_descr, PANGO_STRETCH_NORMAL);
    } else if ( apos.stretch <= NR_POS_STRETCH_SEMI_EXPANDED ) {
        pango_font_description_set_stretch(temp_descr, PANGO_STRETCH_SEMI_EXPANDED);
    } else if ( apos.stretch <= NR_POS_STRETCH_EXPANDED ) {
        pango_font_description_set_stretch(temp_descr, PANGO_STRETCH_EXPANDED);
    } else {
        pango_font_description_set_stretch(temp_descr, PANGO_STRETCH_EXTRA_EXPANDED);
    }

    font_instance *res = Face(temp_descr);
    pango_font_description_free(temp_descr);
    return res;
}

void font_factory::UnrefFace(font_instance *who)
{
    if ( who == NULL ) return;
    if ( loadedFaces.find(who->descr) == loadedFaces.end() ) {
        // not found
        char *tc = pango_font_description_to_string(who->descr);
        g_warning("unrefFace %p=%s: failed\n",who,tc);
        g_free(tc);
    } else {
        loadedFaces.erase(loadedFaces.find(who->descr));
        //              printf("unrefFace %p: success\n",who);
    }
}

void font_factory::AddInCache(font_instance *who)
{
    if ( who == NULL ) return;
    for (int i = 0;i < nbEnt;i++) ents[i].age *= 0.9;
    for (int i = 0;i < nbEnt;i++) {
        if ( ents[i].f == who ) {
            //                printf("present\n");
            ents[i].age += 1.0;
            return;
        }
    }
    if ( nbEnt > maxEnt ) {
        printf("cache sur-plein?\n");
        return;
    }
    who->Ref();
    if ( nbEnt == maxEnt ) {
        int    bi = 0;
        double ba = ents[bi].age;
        for (int i = 1;i < nbEnt;i++) {
            if ( ents[i].age < ba ) {
                bi = i;
                ba = ents[bi].age;
            }
        }
        ents[bi].f->Unref();
        ents[bi]=ents[--nbEnt];
    }
    ents[nbEnt].f = who;
    ents[nbEnt].age = 1.0;
    nbEnt++;
}


/*
  Local Variables:
  mode:c++
  c-file-style:"stroustrup"
  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
  indent-tabs-mode:nil
  fill-column:99
  End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :

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