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package net.sourceforge.plantuml.tim;
import java.util.ArrayList;
import java.util.List;
import net.sourceforge.plantuml.json.Json;
import net.sourceforge.plantuml.json.JsonValue;
import net.sourceforge.plantuml.text.StringLocated;
import net.sourceforge.plantuml.text.TLineType;
import net.sourceforge.plantuml.tim.expression.TValue;
import net.sourceforge.plantuml.tim.expression.Token;
import net.sourceforge.plantuml.tim.expression.TokenStack;
import net.sourceforge.plantuml.tim.expression.TokenType;
import net.sourceforge.plantuml.utils.LineLocation;
public abstract class Eater {
private int i = 0;
private final StringLocated stringLocated;
public Eater(StringLocated stringLocated) {
this.stringLocated = stringLocated;
}
public final LineLocation getLineLocation() {
return stringLocated.getLocation();
}
public final StringLocated getStringLocated() {
return stringLocated;
}
public abstract void analyze(TContext context, TMemory memory) throws EaterException;
public int getCurrentPosition() {
return i;
}
final protected String eatAllToEnd() throws EaterException {
final String result = stringLocated.getString().substring(i);
i = stringLocated.length();
return result;
}
final public TValue eatExpression(TContext context, TMemory memory) throws EaterException {
final char ch = peekChar();
if (ch == '{' || ch == '[') {
final String data = eatAllToEnd();
// System.err.println("data=" + data);
final JsonValue json = Json.parse(data);
// System.err.println("json=" + json);
return TValue.fromJson(json);
}
final TokenStack tokenStack = eatTokenStack();
return tokenStack.getResult(getStringLocated(), context, memory);
}
final protected TokenStack eatTokenStack() throws EaterException {
final TokenStack tokenStack = new TokenStack();
addIntoTokenStack(tokenStack, false);
if (tokenStack.size() == 0)
throw new EaterException("Missing expression", stringLocated);
return tokenStack;
}
final protected TValue eatExpressionStopAtColon(TContext context, TMemory memory) throws EaterException {
final TokenStack tokenStack = new TokenStack();
addIntoTokenStack(tokenStack, true);
return tokenStack.getResult(getStringLocated(), context, memory);
}
final protected void addIntoTokenStack(TokenStack tokenStack, boolean stopAtColon) throws EaterException {
Token lastToken = null;
while (true) {
final Token token = TokenType.eatOneToken(lastToken, this, stopAtColon);
if (token == null)
return;
tokenStack.add(token);
if (token.getTokenType() != TokenType.SPACES)
lastToken = token;
}
}
final public String eatAndGetQuotedString() throws EaterException {
final char separator = peekChar();
if (TLineType.isQuote(separator) == false)
throw new EaterException("quote10", stringLocated);
checkAndEatChar(separator);
final StringBuilder value = new StringBuilder();
addUpTo(separator, value);
checkAndEatChar(separator);
return value.toString();
}
final protected String eatAndGetOptionalQuotedString() throws EaterException {
final char quote = peekChar();
if (TLineType.isQuote(quote))
return eatAndGetQuotedString();
final StringBuilder value = new StringBuilder();
// DEPLICATE eatUntilCloseParenthesisOrComma
int level = 0;
while (true) {
char ch = peekChar();
if (ch == 0)
throw new EaterException("until001", stringLocated);
if (level == 0 && (ch == ',' || ch == ')'))
return value.toString().trim();
ch = eatOneChar();
if (ch == '(')
level++;
else if (ch == ')')
level--;
value.append(ch);
}
// addUpTo(',', ')', value);
// return value.toString();
}
final public String eatAndGetNumber() throws EaterException {
final StringBuilder result = new StringBuilder();
while (true) {
final char ch = peekChar();
if (result.length() == 0 && ch == '-') {
result.append(eatOneChar());
continue;
}
if (ch == 0 || TLineType.isLatinDigit(ch) == false)
return result.toString();
result.append(eatOneChar());
}
}
final public String eatAndGetSpaces() throws EaterException {
final StringBuilder result = new StringBuilder();
while (true) {
final char ch = peekChar();
if (ch == 0 || TLineType.isSpaceChar(ch) == false)
return result.toString();
result.append(eatOneChar());
}
}
final protected String eatAndGetVarname() throws EaterException {
final StringBuilder varname = new StringBuilder("" + eatOneChar());
if (TLineType.isLetterOrUnderscoreOrDollar(varname.charAt(0)) == false)
throw new EaterException("a002", stringLocated);
addUpToLastLetterOrUnderscoreOrDigit(varname);
return varname.toString();
}
final protected String eatAndGetFunctionName() throws EaterException {
final StringBuilder varname = new StringBuilder("" + eatOneChar());
if (TLineType.isLetterOrUnderscoreOrDollar(varname.charAt(0)) == false)
throw new EaterException("a003", stringLocated);
addUpToLastLetterOrUnderscoreOrDigit(varname);
return varname.toString();
}
final public void skipSpaces() {
while (i < stringLocated.length() && Character.isWhitespace(stringLocated.charAt(i)))
i++;
}
final protected void skipUntilChar(char ch) {
while (i < stringLocated.length() && stringLocated.charAt(i) != ch)
i++;
}
final public char peekChar() {
if (i >= stringLocated.length())
return 0;
return stringLocated.charAt(i);
}
final public boolean matchAffectation() {
final String tmp = stringLocated.getString().substring(i);
final boolean result = tmp.matches("^\\$?[_\\p{L}][_\\p{L}0-9]*\\s*=.*");
return result;
}
final public char peekCharN2() {
if (i + 1 >= stringLocated.length())
return 0;
return stringLocated.charAt(i + 1);
}
final protected boolean hasNextChar() {
return i < stringLocated.length();
}
final public char eatOneChar() {
final char ch = stringLocated.charAt(i);
i++;
return ch;
}
final protected void checkAndEatChar(char ch) throws EaterException {
if (i >= stringLocated.length() || stringLocated.charAt(i) != ch)
throw new EaterException("a001", stringLocated);
i++;
}
final protected boolean safeCheckAndEatChar(char ch) throws EaterException {
if (i >= stringLocated.length() || stringLocated.charAt(i) != ch)
return false;
i++;
return true;
}
final protected void optionallyEatChar(char ch) throws EaterException {
if (i >= stringLocated.length() || stringLocated.charAt(i) != ch)
return;
assert stringLocated.charAt(i) == ch;
i++;
}
final protected void checkAndEatChar(String s) throws EaterException {
for (int j = 0; j < s.length(); j++)
checkAndEatChar(s.charAt(j));
}
final protected void addUpToLastLetterOrUnderscoreOrDigit(StringBuilder sb) {
while (i < stringLocated.length()) {
final char ch = stringLocated.charAt(i);
if (TLineType.isLetterOrUnderscoreOrDigit(ch) == false)
return;
i++;
sb.append(ch);
}
}
final protected void addUpTo(char separator, StringBuilder sb) {
while (i < stringLocated.length()) {
final char ch = peekChar();
if (ch == separator)
return;
i++;
sb.append(ch);
}
}
final protected TFunctionImpl eatDeclareFunction(TContext context, TMemory memory, boolean unquoted,
StringLocated location, boolean allowNoParenthesis, TFunctionType type) throws EaterException {
final List args = new ArrayList<>();
final String functionName = eatAndGetFunctionName();
skipSpaces();
if (safeCheckAndEatChar('(') == false) {
if (allowNoParenthesis)
return new TFunctionImpl(functionName, args, unquoted, type);
throw new EaterException("Missing opening parenthesis", stringLocated);
}
while (true) {
skipSpaces();
char ch = peekChar();
if (TLineType.isLetterOrUnderscoreOrDollar(ch)) {
final String varname = eatAndGetVarname();
skipSpaces();
final TValue defValue;
if (peekChar() == '=') {
eatOneChar();
final TokenStack def = TokenStack.eatUntilCloseParenthesisOrComma(this);
def.guessFunctions(location);
defValue = def.getResult(getStringLocated(), context, memory);
// System.err.println("result=" + defValue);
} else {
defValue = null;
}
args.add(new TFunctionArgument(varname, defValue));
} else if (ch == ',') {
checkAndEatChar(',');
} else if (ch == ')') {
checkAndEatChar(")");
break;
} else {
throw new EaterException("Error in function definition", stringLocated);
}
}
skipSpaces();
return new TFunctionImpl(functionName, args, unquoted, type);
}
final protected TFunctionImpl eatDeclareReturnFunctionWithOptionalReturn(TContext context, TMemory memory,
boolean unquoted, StringLocated location) throws EaterException {
final TFunctionImpl result = eatDeclareFunction(context, memory, unquoted, location, false,
TFunctionType.RETURN_FUNCTION);
if (peekChar() == 'r') {
checkAndEatChar("return");
skipSpaces();
final String line = "!return " + eatAllToEnd();
result.addBody(new StringLocated(line, location.getLocation()));
} else if (peekChar() == '!') {
checkAndEatChar("!return");
skipSpaces();
final String line = "!return " + eatAllToEnd();
result.addBody(new StringLocated(line, location.getLocation()));
}
return result;
}
final protected TFunctionImpl eatDeclareProcedure(TContext context, TMemory memory, boolean unquoted,
StringLocated location) throws EaterException {
final TFunctionImpl result = eatDeclareFunction(context, memory, unquoted, location, false,
TFunctionType.PROCEDURE);
return result;
}
}
