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// Scintilla source code edit control
/** @file OptionSet.h
** Manage descriptive information about an options struct for a lexer.
** Hold the names, positions, and descriptions of boolean, integer and string options and
** allow setting options and retrieving metadata about the options.
**/
// Copyright 2010 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.
#ifndef OPTIONSET_H
#define OPTIONSET_H
namespace Lexilla {
template <typename T>
class OptionSet {
typedef T Target;
typedef bool T::*plcob;
typedef int T::*plcoi;
typedef std::string T::*plcos;
struct Option {
int opType;
union {
plcob pb;
plcoi pi;
plcos ps;
};
std::string value;
std::string description;
Option() :
opType(SC_TYPE_BOOLEAN), pb(nullptr) {
}
Option(plcob pb_, std::string_view description_="") :
opType(SC_TYPE_BOOLEAN), pb(pb_), description(description_) {
}
Option(plcoi pi_, std::string_view description_) :
opType(SC_TYPE_INTEGER), pi(pi_), description(description_) {
}
Option(plcos ps_, std::string_view description_) :
opType(SC_TYPE_STRING), ps(ps_), description(description_) {
}
bool Set(T *base, const char *val) {
value = val;
switch (opType) {
case SC_TYPE_BOOLEAN: {
const bool option = atoi(val) != 0;
if ((*base).*pb != option) {
(*base).*pb = option;
return true;
}
break;
}
case SC_TYPE_INTEGER: {
const int option = atoi(val);
if ((*base).*pi != option) {
(*base).*pi = option;
return true;
}
break;
}
case SC_TYPE_STRING: {
if ((*base).*ps != val) {
(*base).*ps = val;
return true;
}
break;
}
default:
break;
}
return false;
}
const char *Get() const noexcept {
return value.c_str();
}
};
typedef std::map<std::string, Option, std::less<>> OptionMap;
OptionMap nameToDef;
std::string names;
std::string wordLists;
void AppendName(const char *name) {
if (!names.empty())
names += "\n";
names += name;
}
public:
void DefineProperty(const char *name, plcob pb, std::string_view description="") {
nameToDef[name] = Option(pb, description);
AppendName(name);
}
void DefineProperty(const char *name, plcoi pi, std::string_view description="") {
nameToDef[name] = Option(pi, description);
AppendName(name);
}
void DefineProperty(const char *name, plcos ps, std::string_view description="") {
nameToDef[name] = Option(ps, description);
AppendName(name);
}
template <typename E>
void DefineProperty(const char *name, E T::*pe, std::string_view description="") {
static_assert(std::is_enum<E>::value);
plcoi pi {};
static_assert(sizeof(pe) == sizeof(pi));
memcpy(&pi, &pe, sizeof(pe));
nameToDef[name] = Option(pi, description);
AppendName(name);
}
const char *PropertyNames() const noexcept {
return names.c_str();
}
int PropertyType(const char *name) const {
typename OptionMap::const_iterator const it = nameToDef.find(name);
if (it != nameToDef.end()) {
return it->second.opType;
}
return SC_TYPE_BOOLEAN;
}
const char *DescribeProperty(const char *name) const {
typename OptionMap::const_iterator const it = nameToDef.find(name);
if (it != nameToDef.end()) {
return it->second.description.c_str();
}
return "";
}
bool PropertySet(T *base, const char *name, const char *val) {
typename OptionMap::iterator const it = nameToDef.find(name);
if (it != nameToDef.end()) {
return it->second.Set(base, val);
}
return false;
}
const char *PropertyGet(const char *name) const {
typename OptionMap::const_iterator const it = nameToDef.find(name);
if (it != nameToDef.end()) {
return it->second.Get();
}
return nullptr;
}
void DefineWordListSets(const char * const wordListDescriptions[]) {
if (wordListDescriptions) {
for (size_t wl = 0; wordListDescriptions[wl]; wl++) {
if (wl > 0)
wordLists += "\n";
wordLists += wordListDescriptions[wl];
}
}
}
const char *DescribeWordListSets() const noexcept {
return wordLists.c_str();
}
};
}
#endif
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