short nsUnicodeFontMappingMac::GetFontID(PRUnichar aChar) {
// initialize to bogus values
short firstSymbolicFont = BAD_FONT_NUM, firstNonSymbolicFont = BAD_FONT_NUM;
PRInt32 firstSymbolicFontIndex = -1;
// Trap invisible chars
if (CCMAP_HAS_CHAR_EXT(gIgnorableCCMapExt, aChar)) {
return IGNORABLE_FONT_NUM;
}
// find the first symbolic font that has a glyph for aChar
// and if there is one, remember it's index in the font list
for(PRInt32 i = 0; i < mFontList.Count(); i++)
{
nsUnicodeFontMappingEntry* entry = (nsUnicodeFontMappingEntry*) mFontList[i];
PRUint16 *ccmap = entry->GetCCMap();
if(ccmap && CCMAP_HAS_CHAR(ccmap, aChar))
{
firstSymbolicFontIndex = i;
firstSymbolicFont = entry->GetFontNum();
break;
}
}
// find the first non-symbolic font that has a glyph for aChar
nsUnicodeBlock block = GetBlock(aChar);
if(block < kUnicodeBlockFixedScriptMax)
{
firstNonSymbolicFont = mScriptFallbackFontIDs[gUtil->BlockToScript(block)];
// if there was no symbolic font we don't need to loop through the list again
if(firstSymbolicFont == BAD_FONT_NUM)
return firstNonSymbolicFont;
// find the index of the first non symbolic font in the list and return the
// first font (symbolic or non symbolic) in the list that has a glyph for this char
for(PRInt32 i = 0; i < mFontList.Count(); i++)
{
nsUnicodeFontMappingEntry* entry = (nsUnicodeFontMappingEntry*) mFontList[i];
if(entry->GetFontNum() == firstNonSymbolicFont)
{
return (firstSymbolicFontIndex < i ? firstSymbolicFont : firstNonSymbolicFont);
}
}
return firstNonSymbolicFont;
}
return (firstSymbolicFont != BAD_FONT_NUM ? firstSymbolicFont :
mScriptFallbackFontIDs[ mPrivBlockToScript[ block - kUnicodeBlockFixedScriptMax] ]);
}
void
nsCompressedCharMap::SetChars(PRUint16* aCCMap)
{
int i, j;
if(mExtended){
PRUint32 page = CCMAP_BEGIN_AT_START_OF_MAP;
while (NextNonEmptyCCMapPage(aCCMap, &page)) {
PRUint32 pagechar = page;
for (i=0; i<(CCMAP_BITS_PER_PAGE/8); i++) {
for (j=0; j<8; j++) {
if (CCMAP_HAS_CHAR_EXT(aCCMap, pagechar)) {
SetChar(pagechar);
}
pagechar++;
}
}
}
} else {
//
// Copy the input CCMap
//
// walk thru the upper pointers
PRUint16 *upper = &aCCMap[0];
for (i=0; i<CCMAP_NUM_UPPER_POINTERS; i++) {
if (upper[i] == CCMAP_EMPTY_MID)
continue;
// walk the mid array
PRUint16 *mid = &aCCMap[upper[i]];
for (j=0; j<CCMAP_NUM_MID_POINTERS; j++) {
if (mid[j] == CCMAP_EMPTY_PAGE)
continue;
PRUint32 base = (i*CCMAP_NUM_UCHARS_PER_MID) + (j*CCMAP_NUM_UCHARS_PER_PAGE);
NS_ASSERTION(base<NUM_UNICODE_CHARS, "invalid page address");
ALU_TYPE *page = (ALU_TYPE*)&aCCMap[mid[j]];
SetChars((PRUint16)base, page);
}
}
}
}
// Non-BMP unicode support extension, create ccmap for both BMP and extended planes
PRUint16*
MapToCCMapExt(PRUint32* aBmpPlaneMap, PRUint32** aOtherPlaneMaps, PRUint32 aOtherPlaneNum)
{
nsCompressedCharMap* otherPlaneObj[EXTENDED_UNICODE_PLANES];
PRUint32 totalSize;
PRUint16 i;
PRUint32 *planeCCMapOffsets;
PRUint32 currOffset;
NS_ASSERTION(aOtherPlaneNum <= EXTENDED_UNICODE_PLANES, "illegal argument value");
if (aOtherPlaneNum > EXTENDED_UNICODE_PLANES)
return nsnull;
// Put the data into a temp map
nsCompressedCharMap bmpCcmapObj;
bmpCcmapObj.SetChars(aBmpPlaneMap);
// Add bmp size
totalSize = bmpCcmapObj.GetSize();
// Add bmp length field
totalSize += CCMAP_EXTRA;
// Add Plane array
totalSize += EXTENDED_UNICODE_PLANES * sizeof(PRUint32)/sizeof(PRUint16);
// Add an empty plane ccmap
// A totally empty plane ccmap can be represented by 16 *(PRUint16)0.
totalSize += CCMAP_EMPTY_SIZE_PER_INT16;
// Create ccmap for other planes
for (i = 0; i < aOtherPlaneNum; i++) {
if (aOtherPlaneMaps[i]) {
otherPlaneObj[i] = new nsCompressedCharMap();
NS_ASSERTION(otherPlaneObj, "unable to create new nsCompressedCharMap");
if(otherPlaneObj) {
otherPlaneObj[i]->SetChars(aOtherPlaneMaps[i]);
totalSize += otherPlaneObj[i]->GetSize();
}
} else {
otherPlaneObj[i] = nsnull;
}
}
PRUint16 *ccmap = (PRUint16*)PR_Malloc(totalSize * sizeof(PRUint16));
NS_ASSERTION(ccmap, "failed to alloc new CCMap");
if (!ccmap)
return nsnull;
// Assign BMP ccmap size
ccmap += CCMAP_EXTRA;
CCMAP_SIZE(ccmap) = bmpCcmapObj.GetSize();
CCMAP_FLAG(ccmap) = CCMAP_SURROGATE_FLAG;
// Fill bmp plane ccmap
bmpCcmapObj.FillCCMap(ccmap);
// Get pointer for plane ccmap offset array
currOffset = bmpCcmapObj.GetSize();
planeCCMapOffsets = (PRUint32*)(ccmap+currOffset);
currOffset += sizeof(PRUint32)/sizeof(PRUint16)*EXTENDED_UNICODE_PLANES;
// Put a empty ccmap there
memset(ccmap+currOffset, '\0', sizeof(PRUint16)*16);
PRUint32 emptyCCMapOffset = currOffset;
currOffset += CCMAP_EMPTY_SIZE_PER_INT16;
// Now fill all rest of the planes' ccmap and put off in array
for (i = 0; i <aOtherPlaneNum; i++) {
if (aOtherPlaneMaps[i] && otherPlaneObj[i]) {
*(planeCCMapOffsets+i) = currOffset;
otherPlaneObj[i]->FillCCMap(ccmap+currOffset);
currOffset += otherPlaneObj[i]->GetSize();
}
else
*(planeCCMapOffsets+i) = emptyCCMapOffset;
}
for (; i < EXTENDED_UNICODE_PLANES; i++) {
*(planeCCMapOffsets+i) = emptyCCMapOffset;
}
// remove all nsCompressedCharMap objects allocated
for (i = 0; i < aOtherPlaneNum; i++) {
if (otherPlaneObj[i])
delete otherPlaneObj[i];
}
#ifdef DEBUG
PRUint32 k, h, l, plane, offset;
PRBool oldb;
PRBool newb;
// testing for BMP plane
for (k=0; k<NUM_UNICODE_CHARS; k++) {
oldb = IS_REPRESENTABLE(aBmpPlaneMap, k);
newb = CCMAP_HAS_CHAR_EXT(ccmap, k);
NS_ASSERTION(oldb==newb,"failed to generate map correctly");
}
//testing for extension plane
for (k = 0x10000; k < 0x100000; k++) {
plane = k/0x10000;
if (plane > aOtherPlaneNum)
break;
if (aOtherPlaneMaps[plane-1])
oldb = IS_REPRESENTABLE(aOtherPlaneMaps[plane-1], k&0xffff);
else
oldb = 0;
newb = CCMAP_HAS_CHAR_EXT(ccmap, k);
NS_ASSERTION(oldb==newb, "failed to generate extension map correctly");
}
// testing for non-BMP plane
for (h = 0; h < 0x400; h++) {
for (l = 0; l < 0x400; l++) {
plane = h >> 6;
offset = (h*0x400 + l) & 0xffff;
if (aOtherPlaneMaps[plane])
oldb = IS_REPRESENTABLE(aOtherPlaneMaps[plane], offset);
else
oldb = 0;
newb = CCMAP_HAS_CHAR_EXT2(ccmap, h+0xd800, l+0xdc00);
NS_ASSERTION(oldb==newb, "failed to generate extension map correctly");
}
}
#endif
return ccmap;
}