static void addNbsps(DFNode *node, int inParagraph, int *havePrecedingSpace)
{
switch (node->tag) {
case WORD_P:
inParagraph = 1;
*havePrecedingSpace = 1;
break;
case DOM_TEXT: {
if (node->parent->tag != WORD_T)
break;
uint32_t *chars = DFUTF8To32(node->value);
size_t length = DFUTF32Length(chars);
for (size_t i = 0; i < length; i++) {
if (chars[i] == ' ') {
if (*havePrecedingSpace)
chars[i] = DFNbspChar;
else
*havePrecedingSpace = 1;
}
else {
*havePrecedingSpace = 0;
}
}
char *value = DFUTF32to8(chars);
DFSetNodeValue(node,value);
free(value);
free(chars);
break;
}
}
for (DFNode *child = node->first; child != NULL; child = child->next)
addNbsps(child,inParagraph,havePrecedingSpace);
}
static void removeNbsps(DFNode *node)
{
if (node->tag == DOM_TEXT) {
uint32_t *chars = DFUTF8To32(node->value);
size_t length = DFUTF32Length(chars);
for (size_t i = 0; i < length; i++) {
if (chars[i] == DFNbspChar)
chars[i] = ' ';
}
char *value = DFUTF32to8(chars);
DFSetNodeValue(node,value);
free(value);
free(chars);
}
for (DFNode *child = node->first; child != NULL; child = child->next)
removeNbsps(child);
}
void DFStripWhitespace(DFNode *node)
{
if (node->tag == DOM_TEXT) {
char *trimmed = DFStringTrimWhitespace(node->value);
if ((strlen(trimmed) == 0) && (node->parent != NULL))
DFRemoveNode(node);
else
DFSetNodeValue(node,trimmed);
free(trimmed);
}
else {
if (node->tag >= MIN_ELEMENT_TAG) {
const char *space = DFGetAttribute(node,XML_SPACE);
if ((space != NULL) && !strcmp(space,"preserve"))
return;
}
DFNode *next;
for (DFNode *child = node->first; child != NULL; child = next) {
next = child->next;
DFStripWhitespace(child);
}
}
}
static void extractPrefixRecursive(DFNode *node, const char *counterName, DFBuffer *result,
int *foundSeq, int *foundContent)
{
if (isSeqField(node)) {
if (result->len > 0)
DFBufferFormat(result," ");
DFBufferFormat(result,"counter(%s)",counterName);
*foundSeq = 1;
DFRemoveNode(node);
return;
}
if (node->tag == DOM_TEXT) {
size_t valueLen = strlen(node->value);
size_t pos = 0;
if (*foundSeq) {
size_t offset = 0;
uint32_t ch;
do {
pos = offset;
ch = DFNextChar(node->value,&offset);
} while ((ch != 0) && (DFCharIsWhitespaceOrNewline(ch) || DFCharIsPunctuation(ch)));
}
else {
pos = valueLen;
}
if (pos == valueLen) {
if (result->len > 0)
DFBufferFormat(result," ");
char *quotedValue = DFQuote(node->value);
DFBufferFormat(result,"%s",quotedValue);
free(quotedValue);
DFRemoveNode(node);
if (*foundSeq)
*foundContent = 1;
return;
}
else if (pos > 0) {
char *first = DFSubstring(node->value,0,pos);
char *rest = DFSubstring(node->value,pos,valueLen);
if (result->len > 0)
DFBufferFormat(result," ");
char *quotedFirst = DFQuote(first);
DFBufferFormat(result,"%s",quotedFirst);
free(quotedFirst);
DFSetNodeValue(node,rest);
if (*foundSeq)
*foundContent = 1;
free(first);
free(rest);
return;
}
}
int wasEmpty = (node->first == NULL);
DFNode *next;
for (DFNode *child = node->first; child != NULL; child = next) {
next = child->next;
if (*foundContent)
break;
extractPrefixRecursive(child,counterName,result,foundSeq,foundContent);
}
int isEmpty = (node->first == NULL);
if ((node->tag == HTML_SPAN) && isEmpty && !wasEmpty)
DFRemoveNode(node);
}
