vdr-plugin-skindesigner/libtemplate/parameter.c

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#include "../config.h"
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#include "parameter.h"
using namespace std;
// --- cNumericParameter -------------------------------------------------------------
cNumericParameter::cNumericParameter(string value) {
this->value = value;
globals = NULL;
isValid = false;
width = 0;
height = 0;
columnWidth = -1;
rowHeight = -1;
hor = true;
defaultValue = 0;
}
cNumericParameter::~cNumericParameter(void) {
}
void cNumericParameter::SetAreaSize(int w, int h) {
width = w;
height = h;
}
int cNumericParameter::Parse(string &parsedValue) {
int retVal = defaultValue;
if (IsNumber(value)) {
isValid = true;
retVal = atoi(value.c_str());
return retVal;
}
//checking for percent value
bool isPercentValue = CheckPercentValue(retVal);
if (isPercentValue) {
isValid = true;
return retVal;
}
//checking for expression
bool isValidExpression = CheckExpression(retVal, parsedValue);
if (isValidExpression) {
isValid = true;
return retVal;
}
return retVal;
}
bool cNumericParameter::IsNumber(const string& s) {
string::const_iterator it = s.begin();
while (it != s.end() && isdigit(*it)) ++it;
return !s.empty() && it == s.end();
}
bool cNumericParameter::CheckPercentValue(int &val) {
bool ok = false;
size_t posPercent = value.find('%');
if (posPercent != string::npos) {
string strPerc = value.substr(0, posPercent);
if (!IsNumber(strPerc)) {
return ok;
}
int perc = atoi(strPerc.c_str());
if (hor) {
val = width * perc / 100;
} else {
val = height * perc / 100;
}
ok = true;
}
return ok;
}
bool cNumericParameter::CheckExpression(int &val, string &parsedVal) {
bool ok = false;
string parsedValue = value;
//remove white spaces
parsedValue.erase( std::remove_if( parsedValue.begin(), parsedValue.end(), ::isspace ), parsedValue.end() );
//check and replace {areawidth} and {areaheight} tokens
string tokenWidth = "{areawidth}";
string tokenHeight = "{areaheight}";
stringstream sw;
sw << width;
string strWidth = sw.str();
stringstream sh;
sh << height;
string strHeight = sh.str();
bool foundToken = true;
while(foundToken) {
size_t foundTokenWidth = parsedValue.find(tokenWidth);
if (foundTokenWidth != string::npos) {
parsedValue = parsedValue.replace(foundTokenWidth, tokenWidth.size(), strWidth);
} else {
foundToken = false;
}
}
foundToken = true;
while(foundToken) {
size_t foundTokenHeight = parsedValue.find(tokenHeight);
if (foundTokenHeight != string::npos) {
parsedValue = parsedValue.replace(foundTokenHeight, tokenHeight.size(), strHeight);
} else {
foundToken = false;
}
}
//check and replace {columnwidth} and {rowheight} tokens for loop functions
if (columnWidth > 0 || rowHeight > 0) {
tokenWidth = "{columnwidth}";
tokenHeight = "{rowheight}";
stringstream cw;
cw << columnWidth;
strWidth = cw.str();
stringstream rh;
rh << rowHeight;
strHeight = rh.str();
foundToken = true;
while(foundToken) {
size_t foundTokenWidth = parsedValue.find(tokenWidth);
if (foundTokenWidth != string::npos) {
parsedValue = parsedValue.replace(foundTokenWidth, tokenWidth.size(), strWidth);
} else {
foundToken = false;
}
}
foundToken = true;
while(foundToken) {
size_t foundTokenHeight = parsedValue.find(tokenHeight);
if (foundTokenHeight != string::npos) {
parsedValue = parsedValue.replace(foundTokenHeight, tokenHeight.size(), strHeight);
} else {
foundToken = false;
}
}
}
if (globals) {
globals->ReplaceIntVars(parsedValue);
globals->ReplaceDoubleVars(parsedValue);
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}
if (IsNumber(parsedValue)) {
ok = true;
val = atoi(parsedValue.c_str());
return ok;
}
if (!ValidNumericExpression(parsedValue)) {
parsedVal = parsedValue;
return ok;
}
ok = true;
char * expression = new char[parsedValue.size() + 1];
std::copy(parsedValue.begin(), parsedValue.end(), expression);
expression[parsedValue.size()] = '\0';
int expRes = EvaluateTheExpression(expression);
val = expRes;
delete[] expression;
return ok;
}
bool cNumericParameter::ValidNumericExpression(string &parsedValue) {
string::const_iterator it = parsedValue.begin();
while (it != parsedValue.end() && (isdigit(*it) || *it == '.' || *it == ',' || *it == '+' || *it == '-' || *it == '*' || *it == '/')) ++it;
return !parsedValue.empty() && it == parsedValue.end();
}
int cNumericParameter::EvaluateTheExpression(char* expr) {
return round(ParseSummands(expr));
}
double cNumericParameter::ParseAtom(char*& expr) {
// Read the number from string
char* end_ptr;
double res = strtod(expr, &end_ptr);
// Advance the pointer and return the result
expr = end_ptr;
return res;
}
// Parse multiplication and division
double cNumericParameter::ParseFactors(char*& expr) {
double num1 = ParseAtom(expr);
for(;;) {
// Save the operation
char op = *expr;
if(op != '/' && op != '*')
return num1;
expr++;
double num2 = ParseAtom(expr);
// Perform the saved operation
if(op == '/') {
if (num2 != 0) {
num1 /= num2;
}
} else
num1 *= num2;
}
}
// Parse addition and subtraction
double cNumericParameter::ParseSummands(char*& expr) {
double num1 = ParseFactors(expr);
for(;;) {
char op = *expr;
if(op != '-' && op != '+')
return num1;
expr++;
double num2 = ParseFactors(expr);
if(op == '-')
num1 -= num2;
else
num1 += num2;
}
}
// --- cConditionalParameter -------------------------------------------------------------
cConditionalParameter::cConditionalParameter(cGlobals *globals, string value) {
this->globals = globals;
isTrue = false;
this->value = value;
type = cpNone;
}
cConditionalParameter::~cConditionalParameter(void) {
}
void cConditionalParameter::Tokenize(void) {
size_t posAnd = value.find("++");
if (posAnd != string::npos) {
type = cpAnd;
TokenizeValue("++");
} else {
size_t posOr = value.find("||");
if (posOr != string::npos) {
type = cpOr;
TokenizeValue("||");
}
}
if (type == cpNone) {
InsertCondition(value);
}
}
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void cConditionalParameter::Evaluate(map < string, int > *intTokens, map < string, string > *stringTokens) {
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isTrue = false;
bool first = true;
for (vector<sCondition>::iterator cond = conditions.begin(); cond != conditions.end(); cond++) {
bool tokenTrue = false;
if (cond->type == ctStringSet) {
if (stringTokens) {
map < string, string >::iterator hit = stringTokens->find(cond->tokenName);
if (hit != stringTokens->end()) {
string value = hit->second;
if (value.size() > 0)
tokenTrue = true;
}
}
} else if (cond->type == ctStringEmpty) {
if (stringTokens) {
map < string, string >::iterator hit = stringTokens->find(cond->tokenName);
if (hit != stringTokens->end()) {
string value = hit->second;
if (value.size() == 0)
tokenTrue = true;
} else {
tokenTrue = true;
}
} else {
tokenTrue = true;
}
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} else {
int tokenValue = EvaluateParameter(cond->tokenName, intTokens, stringTokens);
if (cond->type == ctBool) {
tokenTrue = tokenValue;
} else if (cond->type == ctGreater) {
tokenTrue = (tokenValue > cond->compareValue) ? true : false;
} else if (cond->type == ctLower) {
tokenTrue = (tokenValue < cond->compareValue) ? true : false;
} else if (cond->type == ctEquals) {
tokenTrue = (tokenValue == cond->compareValue) ? true : false;
}
}
if (cond->isNegated)
tokenTrue = !tokenTrue;
if (type == cpAnd) {
if (first)
isTrue = tokenTrue;
else
isTrue = isTrue && tokenTrue;
} else if (type == cpOr) {
isTrue = isTrue || tokenTrue;
} else {
isTrue = tokenTrue;
}
first = false;
}
}
int cConditionalParameter::EvaluateParameter(string token, map < string, int > *intTokens, map < string, string > *stringTokens) {
//first check globals
int result = 0;
if (globals->GetInt(token, result))
return result;
//then check custom tokens
if (globals->GetCustomInt(token, result))
return result;
//then check tokens
if (intTokens) {
map < string, int >::iterator hit = intTokens->find(token);
if (hit != intTokens->end()) {
return hit->second;
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}
}
if (stringTokens) {
map < string, string >::iterator hit = stringTokens->find(token);
if (hit != stringTokens->end()) {
string value = hit->second;
return atoi(value.c_str());
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}
}
return 0;
}
void cConditionalParameter::TokenizeValue(string sep) {
string buffer = value;
bool sepFound = true;
while (sepFound) {
size_t posSep = buffer.find(sep);
if (posSep == string::npos) {
InsertCondition(buffer);
sepFound = false;
}
string token = buffer.substr(0, posSep);
buffer = buffer.replace(0, posSep + sep.size(), "");
InsertCondition(token);
}
}
void cConditionalParameter::InsertCondition(string cond) {
cond.erase( std::remove_if( cond.begin(), cond.end(), ::isspace ), cond.end() );
if (cond.size() < 1)
return;
size_t tokenStart = cond.find('{');
size_t tokenEnd = cond.find('}');
if (tokenStart == string::npos || tokenEnd == string::npos || tokenStart > tokenEnd)
return;
string tokenName = cond.substr(tokenStart + 1, tokenEnd - tokenStart - 1);
string rest = cond.replace(tokenStart, tokenEnd - tokenStart + 1, "");
sCondition sCond;
sCond.tokenName = tokenName;
sCond.type = ctBool;
sCond.compareValue = 0;
sCond.isNegated = false;
if (!rest.compare("not")) {
sCond.isNegated = true;
} else if (!rest.compare("isset")) {
sCond.type = ctStringSet;
} else if (!rest.compare("empty")) {
sCond.type = ctStringEmpty;
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} else if (startswith(rest.c_str(), "gt(")) {
string compVal = rest.substr(4, rest.size() - 5);
sCond.compareValue = atoi(compVal.c_str());
sCond.type = ctGreater;
} else if (startswith(rest.c_str(), "lt(")) {
string compVal = rest.substr(4, rest.size() - 5);
sCond.compareValue = atoi(compVal.c_str());
sCond.type = ctLower;
} else if (startswith(rest.c_str(), "eq(")) {
string compVal = rest.substr(4, rest.size() - 5);
sCond.compareValue = atoi(compVal.c_str());
sCond.type = ctEquals;
}
conditions.push_back(sCond);
}
void cConditionalParameter::Debug(void) {
dsyslog("skindesigner: Condition %s, Type: %s, cond is %s", value.c_str(), (type == cpAnd)?"and combination":((type == cpOr)?"or combination":"single param") , isTrue?"true":"false");
for (vector<sCondition>::iterator it = conditions.begin(); it != conditions.end(); it++) {
dsyslog("skindesigner: cond token %s, type: %d, compareValue %d, negated: %d", it->tokenName.c_str(), it->type, it->compareValue, it->isNegated);
}
}