std::auto_ptr<boost::ptr_vector<AssDialogueBlock>> AssDialogue::ParseTags() const {
boost::ptr_vector<AssDialogueBlock> Blocks;
// Empty line, make an empty block
if (Text.get().empty()) {
Blocks.push_back(new AssDialogueBlockPlain);
return Blocks.release();
}
int drawingLevel = 0;
for (size_t len = Text.get().size(), cur = 0; cur < len; ) {
// Overrides block
if (Text.get()[cur] == '{') {
size_t end = Text.get().find('}', cur);
// VSFilter requires that override blocks be closed, while libass
// does not. We match VSFilter here.
if (end == wxString::npos)
goto plain;
++cur;
// Get contents of block
wxString work = Text.get().substr(cur, end - cur);
cur = end + 1;
if (work.size() && work.find('\\') == wxString::npos) {
//We've found an override block with no backslashes
//We're going to assume it's a comment and not consider it an override block
//Currently we'll treat this as a plain text block, but feel free to create a new class
Blocks.push_back(new AssDialogueBlockPlain("{" + work + "}"));
}
else {
// Create block
AssDialogueBlockOverride *block = new AssDialogueBlockOverride(work);
block->ParseTags();
Blocks.push_back(block);
// Look for \p in block
for (auto const& tag : block->Tags) {
if (tag.Name == "\\p")
drawingLevel = tag.Params[0].Get<int>(0);
}
}
continue;
}
// Plain-text/drawing block
plain:
wxString work;
size_t end = Text.get().find('{', cur + 1);
if (end == wxString::npos) {
work = Text.get().substr(cur);
cur = len;
}
else {
work = Text.get().substr(cur, end - cur);
cur = end;
}
if (drawingLevel == 0)
Blocks.push_back(new AssDialogueBlockPlain(work));
else
Blocks.push_back(new AssDialogueBlockDrawing(work, drawingLevel));
}
return Blocks.release();
}
/////////////////////
// Parses parameters
void AssOverrideTag::ParseParameters(wxString text) {
// text is all text following the name until the next \ or the end of the override block
// Tokenize text, attempting to find all parameters
wxArrayString paramList;
wxString work;
{
if (text.IsEmpty() || text[0] != _T('(')) {
// There's just one (or none at all) parameter (because there's no parantheses)
// This means text is all our parameters
paramList.Add(text.Trim(true).Trim(false));
// Only using goto here to avoid yet another nested block (keeps the code cleaner!)
goto end_tokenizing;
}
// Ok, so there are parantheses used here, so there may be more than one parameter
// Enter fullscale parsing!
size_t i = 0, textlen = text.Length();
size_t start = 0;
int parDepth = 1;
while (i < textlen && parDepth > 0) {
// Just skip until next ',' or ')', whichever comes first
// (Next ')' is achieved when parDepth == 0)
start = ++i;
while (i < textlen && parDepth > 0) {
if (text[i] == _T('(')) parDepth++;
if (text[i] == _T(')')) parDepth--;
// parDepth 1 is where we start, and the tag-level we're interested in parsing on
if (text[i] == _T(',') && parDepth == 1) break;
if (parDepth < 0) {
wxLogWarning(_T("Unmatched parenthesis near '%s'!\nTag-parsing incomplete."), text.SubString(i, 10).c_str());
goto end_tokenizing;
}
if (parDepth == 0) {
// We just ate the paranthesis ending this parameter block
// Make sure it doesn't get included in the parameter text
break;
}
i++;
}
// i now points to the first character not member of this parameter
work = text.SubString(start, i-1);
work.Trim(true).Trim(false);
paramList.Add(work);
wxLogDebug(_T("Got parameter: %s"), work.c_str());
}
if (i+1 < textlen) {
// There's some additional garbage after the parantheses
// Just add it in for completeness
paramList.Add(text.Mid(i+1));
}
}
// This label is only gone to from inside the previous block, if the tokenizing needs to end early
end_tokenizing:
int curPar = 0;
size_t totalPars = paramList.GetCount();
// Get optional parameters flag
ASS_ParameterOptional parsFlag = OPTIONAL_0;
switch (totalPars) {
case 1: parsFlag = OPTIONAL_1; break;
case 2: parsFlag = OPTIONAL_2; break;
case 3: parsFlag = OPTIONAL_3; break;
case 4: parsFlag = OPTIONAL_4; break;
case 5: parsFlag = OPTIONAL_5; break;
case 6: parsFlag = OPTIONAL_6; break;
case 7: parsFlag = OPTIONAL_7; break;
}
// Find prototype
bool clipOnce = true;
AssOverrideTagProto *proto = NULL;
for (std::list<AssOverrideTagProto>::iterator cur=AssOverrideTagProto::proto.begin();cur!=AssOverrideTagProto::proto.end();cur++) {
if (Name == (*cur).name) {
if (Name == _T("\\clip") && totalPars != 4 && clipOnce) {
clipOnce = false;
continue;
}
proto = &(*cur);
break;
}
}
if (proto == NULL) {
throw _T("Couldn't find tag prototype while parsing.");
}
// Get parameters
size_t n=0;
wxString curtok = _T("");
if (curPar < (signed)totalPars) {
curtok = paramList[curPar];
curPar++;
}
// For each parameter
while (n < proto->params.size()) {
AssOverrideParamProto *curproto = &proto->params[n];
bool isDefault = false;
n++;
// Create parameter
AssOverrideParameter *newparam = new AssOverrideParameter;
// Check if it's optional and not set (set to default)
if (!(curproto->optional & parsFlag)) {
if (curproto->defaultValue.GetType() != VARDATA_NONE) {
isDefault = true;
newparam->CopyFrom(curproto->defaultValue);
}
newparam->ommited = true;
// This parameter doesn't really count against the number of parsed parameters,
// since it's left out. Don't count it.
curPar--;
}
if (isDefault == false) {
// Determine parameter type and set value
switch (curproto->type) {
case VARDATA_INT: {
long temp = 0;
curtok.ToLong(&temp);
newparam->SetInt(temp);
break;
}
case VARDATA_FLOAT: {
double temp = 0.0;
curtok.ToDouble(&temp);
newparam->SetFloat(temp);
break;
}
case VARDATA_TEXT: {
newparam->SetText(curtok);
break;
}
case VARDATA_BOOL: {
long temp = false;
curtok.ToLong(&temp);
newparam->SetBool(temp != 0);
break;
}
case VARDATA_BLOCK: {
AssDialogueBlockOverride *temp = new AssDialogueBlockOverride;
temp->text = curtok;
temp->ParseTags();
newparam->SetBlock(temp);
break;
}
}
// Get next actual parameter
if (curPar < (signed)totalPars) {
// Unless this parameter was omitted (in which case the token shouldn't be eaten)
if (!newparam->ommited) {
curtok = paramList[curPar];
}
curPar++;
}
else curtok = _T("");
}
// Add to list
newparam->classification = curproto->classification;
Params.push_back(newparam);
}
}
void AssOverrideTag::ParseParameters(const wxString &text, AssOverrideTagProto::iterator proto_it) {
Clear();
// Tokenize text, attempting to find all parameters
std::vector<wxString> paramList = tokenize(text);
size_t totalPars = paramList.size();
int parsFlag = 1 << (totalPars - 1); // Get optional parameters flag
// vector (i)clip is the second clip proto_ittype in the list
if ((Name == "\\clip" || Name == "\\iclip") && totalPars != 4) {
++proto_it;
}
unsigned curPar = 0;
for (size_t n = 0; n < proto_it->params.size(); n++) {
AssOverrideParamProto *curproto = &proto_it->params[n];
// Create parameter
AssOverrideParameter *newparam = new AssOverrideParameter;
newparam->classification = curproto->classification;
Params.push_back(newparam);
// Check if it's optional and not present
if (!(curproto->optional & parsFlag) || curPar >= totalPars) {
newparam->omitted = true;
continue;
}
wxString curtok = paramList[curPar++];
if (curtok.empty()) {
curPar++;
continue;
}
wxChar firstChar = curtok[0];
bool auto4 = (firstChar == '!' || firstChar == '$' || firstChar == '%') && curproto->type != VARDATA_BLOCK;
if (auto4) {
newparam->Set(curtok);
}
else {
switch (curproto->type) {
case VARDATA_INT: {
long temp;
curtok.ToLong(&temp);
newparam->Set<int>(temp);
break;
}
case VARDATA_FLOAT: {
double temp;
curtok.ToDouble(&temp);
newparam->Set(temp);
break;
}
case VARDATA_TEXT:
newparam->Set(curtok);
break;
case VARDATA_BOOL: {
long temp;
curtok.ToLong(&temp);
newparam->Set<bool>(temp != 0);
break;
}
case VARDATA_BLOCK: {
AssDialogueBlockOverride *temp = new AssDialogueBlockOverride(curtok);
temp->ParseTags();
newparam->Set(temp);
break;
}
default:
break;
}
}
}
}