447 lines
12 KiB
C++
447 lines
12 KiB
C++
#include "json_ui.hh"
|
|
|
|
#include "containers.hh"
|
|
#include "display_buffer.hh"
|
|
#include "exception.hh"
|
|
#include "keys.hh"
|
|
#include "file.hh"
|
|
#include "event_manager.hh"
|
|
#include "value.hh"
|
|
#include "unit_tests.hh"
|
|
|
|
#include <utility>
|
|
|
|
#include <unistd.h>
|
|
|
|
namespace Kakoune
|
|
{
|
|
|
|
template<typename T>
|
|
String to_json(ArrayView<const T> array)
|
|
{
|
|
String res;
|
|
for (auto& elem : array)
|
|
{
|
|
if (not res.empty())
|
|
res += ", ";
|
|
res += to_json(elem);
|
|
}
|
|
return "[" + res + "]";
|
|
}
|
|
|
|
template<typename T, MemoryDomain D>
|
|
String to_json(const Vector<T, D>& vec) { return to_json(ArrayView<const T>{vec}); }
|
|
|
|
String to_json(int i) { return to_string(i); }
|
|
String to_json(bool b) { return b ? "true" : "false"; }
|
|
String to_json(StringView str)
|
|
{
|
|
String res;
|
|
res.reserve(str.length() + 4);
|
|
res += '"';
|
|
for (auto it = str.begin(), end = str.end(); it != end; )
|
|
{
|
|
auto next = std::find_if(it, end, [](char c) {
|
|
return c == '\\' or c == '"' or (c >= 0 and c <= 0x1F);
|
|
});
|
|
|
|
res += StringView{it, next};
|
|
if (next == end)
|
|
break;
|
|
|
|
char buf[7] = {'\\', *next, 0};
|
|
if (*next >= 0 and *next <= 0x1F)
|
|
sprintf(buf, "\\u%04x", *next);
|
|
|
|
res += buf;
|
|
it = next+1;
|
|
}
|
|
res += '"';
|
|
return res;
|
|
}
|
|
|
|
String to_json(Color color)
|
|
{
|
|
if (color.color == Kakoune::Color::RGB)
|
|
{
|
|
char buffer[10];
|
|
sprintf(buffer, R"("#%02x%02x%02x")", color.r, color.g, color.b);
|
|
return buffer;
|
|
}
|
|
return to_json(color_to_str(color));
|
|
}
|
|
|
|
String to_json(Attribute attributes)
|
|
{
|
|
struct Attr { Attribute attr; StringView name; }
|
|
attrs[] {
|
|
{ Attribute::Exclusive, "exclusive" },
|
|
{ Attribute::Underline, "underline" },
|
|
{ Attribute::Reverse, "reverse" },
|
|
{ Attribute::Blink, "blink" },
|
|
{ Attribute::Bold, "bold" },
|
|
{ Attribute::Dim, "dim" },
|
|
{ Attribute::Italic, "italic" },
|
|
};
|
|
|
|
return "[" + join(attrs |
|
|
filter([=](const Attr& a) { return attributes & a.attr; }) |
|
|
transform([](const Attr& a) { return to_json(a.name); }),
|
|
',', false) + "]";
|
|
}
|
|
|
|
String to_json(Face face)
|
|
{
|
|
return format(R"(\{ "fg": {}, "bg": {}, "attributes": {} })",
|
|
to_json(face.fg), to_json(face.bg), to_json(face.attributes));
|
|
}
|
|
|
|
String to_json(const DisplayAtom& atom)
|
|
{
|
|
return format(R"(\{ "face": {}, "contents": {} })", to_json(atom.face), to_json(atom.content()));
|
|
}
|
|
|
|
String to_json(const DisplayLine& line)
|
|
{
|
|
return to_json(line.atoms());
|
|
}
|
|
|
|
String to_json(DisplayCoord coord)
|
|
{
|
|
return format(R"(\{ "line": {}, "column": {} })", coord.line, coord.column);
|
|
}
|
|
|
|
String to_json(MenuStyle style)
|
|
{
|
|
switch (style)
|
|
{
|
|
case MenuStyle::Prompt: return R"("prompt")";
|
|
case MenuStyle::Inline: return R"("inline")";
|
|
}
|
|
return "";
|
|
}
|
|
|
|
String to_json(InfoStyle style)
|
|
{
|
|
switch (style)
|
|
{
|
|
case InfoStyle::Prompt: return R"("prompt")";
|
|
case InfoStyle::Inline: return R"("inline")";
|
|
case InfoStyle::InlineAbove: return R"("inlineAbove")";
|
|
case InfoStyle::InlineBelow: return R"("inlineBelow")";
|
|
case InfoStyle::MenuDoc: return R"("menuDoc")";
|
|
case InfoStyle::Modal: return R"("modal")";
|
|
}
|
|
return "";
|
|
}
|
|
|
|
String concat()
|
|
{
|
|
return "";
|
|
}
|
|
|
|
template<typename First, typename... Args>
|
|
String concat(First&& first, Args&&... args)
|
|
{
|
|
if (sizeof...(Args) != 0)
|
|
return to_json(first) + ", " + concat(args...);
|
|
return to_json(first);
|
|
}
|
|
|
|
template<typename... Args>
|
|
void rpc_call(StringView method, Args&&... args)
|
|
{
|
|
auto q = format(R"(\{ "jsonrpc": "2.0", "method": "{}", "params": [{}] }{})",
|
|
method, concat(std::forward<Args>(args)...), "\n");
|
|
|
|
write(1, q);
|
|
}
|
|
|
|
JsonUI::JsonUI()
|
|
: m_stdin_watcher{0, FdEvents::Read,
|
|
[this](FDWatcher&, FdEvents, EventMode mode) {
|
|
parse_requests(mode);
|
|
}}, m_dimensions{24, 80}
|
|
{
|
|
set_signal_handler(SIGINT, SIG_DFL);
|
|
}
|
|
|
|
void JsonUI::draw(const DisplayBuffer& display_buffer,
|
|
const Face& default_face, const Face& padding_face)
|
|
{
|
|
rpc_call("draw", display_buffer.lines(), default_face, padding_face);
|
|
}
|
|
|
|
void JsonUI::draw_status(const DisplayLine& status_line,
|
|
const DisplayLine& mode_line,
|
|
const Face& default_face)
|
|
{
|
|
rpc_call("draw_status", status_line, mode_line, default_face);
|
|
}
|
|
|
|
|
|
void JsonUI::menu_show(ConstArrayView<DisplayLine> items,
|
|
DisplayCoord anchor, Face fg, Face bg,
|
|
MenuStyle style)
|
|
{
|
|
rpc_call("menu_show", items, anchor, fg, bg, style);
|
|
}
|
|
|
|
void JsonUI::menu_select(int selected)
|
|
{
|
|
rpc_call("menu_select", selected);
|
|
}
|
|
|
|
void JsonUI::menu_hide()
|
|
{
|
|
rpc_call("menu_hide");
|
|
}
|
|
|
|
void JsonUI::info_show(StringView title, StringView content,
|
|
DisplayCoord anchor, Face face,
|
|
InfoStyle style)
|
|
{
|
|
rpc_call("info_show", title, content, anchor, face, style);
|
|
}
|
|
|
|
void JsonUI::info_hide()
|
|
{
|
|
rpc_call("info_hide");
|
|
}
|
|
|
|
void JsonUI::refresh(bool force)
|
|
{
|
|
rpc_call("refresh", force);
|
|
}
|
|
|
|
void JsonUI::set_ui_options(const Options& options)
|
|
{
|
|
// rpc_call("set_ui_options", options);
|
|
}
|
|
|
|
DisplayCoord JsonUI::dimensions()
|
|
{
|
|
return m_dimensions;
|
|
}
|
|
|
|
void JsonUI::set_on_key(OnKeyCallback callback)
|
|
{
|
|
m_on_key = std::move(callback);
|
|
}
|
|
|
|
using JsonArray = Vector<Value>;
|
|
using JsonObject = IdMap<Value>;
|
|
|
|
static bool is_digit(char c) { return c >= '0' and c <= '9'; }
|
|
|
|
std::tuple<Value, const char*>
|
|
parse_json(const char* pos, const char* end)
|
|
{
|
|
using Result = std::tuple<Value, const char*>;
|
|
|
|
if (not skip_while(pos, end, is_blank))
|
|
return {};
|
|
|
|
if (is_digit(*pos))
|
|
{
|
|
auto digit_end = pos;
|
|
skip_while(digit_end, end, is_digit);
|
|
return Result{ Value{str_to_int({pos, digit_end})}, digit_end };
|
|
}
|
|
if (end - pos > 4 and StringView{pos, pos+4} == "true")
|
|
return Result{ Value{true}, pos+4 };
|
|
if (end - pos > 5 and StringView{pos, pos+5} == "false")
|
|
return Result{ Value{false}, pos+5 };
|
|
if (*pos == '"')
|
|
{
|
|
String value;
|
|
bool escaped = false;
|
|
++pos;
|
|
for (auto string_end = pos; string_end != end; ++string_end)
|
|
{
|
|
if (escaped)
|
|
{
|
|
escaped = false;
|
|
value += StringView{pos, string_end};
|
|
value.back() = *string_end;
|
|
pos = string_end+1;
|
|
continue;
|
|
}
|
|
if (*string_end == '\\')
|
|
escaped = true;
|
|
if (*string_end == '"')
|
|
{
|
|
value += StringView{pos, string_end};
|
|
return Result{std::move(value), string_end+1};
|
|
}
|
|
}
|
|
return {};
|
|
}
|
|
if (*pos == '[')
|
|
{
|
|
JsonArray array;
|
|
if (*++pos == ']')
|
|
return Result{std::move(array), pos+1};
|
|
|
|
while (true)
|
|
{
|
|
Value element;
|
|
std::tie(element, pos) = parse_json(pos, end);
|
|
if (not element)
|
|
return {};
|
|
array.push_back(std::move(element));
|
|
if (not skip_while(pos, end, is_blank))
|
|
return {};
|
|
|
|
if (*pos == ',')
|
|
++pos;
|
|
else if (*pos == ']')
|
|
return Result{std::move(array), pos+1};
|
|
else
|
|
throw runtime_error("unable to parse array, expected ',' or ']'");
|
|
}
|
|
}
|
|
if (*pos == '{')
|
|
{
|
|
JsonObject object;
|
|
if (*++pos == '}')
|
|
return Result{std::move(object), pos+1};
|
|
|
|
while (true)
|
|
{
|
|
Value name_value;
|
|
std::tie(name_value, pos) = parse_json(pos, end);
|
|
if (not name_value)
|
|
return {};
|
|
|
|
String& name = name_value.as<String>();
|
|
if (not skip_while(pos, end, is_blank))
|
|
return {};
|
|
if (*pos++ != ':')
|
|
throw runtime_error("expected :");
|
|
|
|
Value element;
|
|
std::tie(element, pos) = parse_json(pos, end);
|
|
if (not element)
|
|
return {};
|
|
object.append({ std::move(name), std::move(element) });
|
|
if (not skip_while(pos, end, is_blank))
|
|
return {};
|
|
|
|
if (*pos == ',')
|
|
++pos;
|
|
else if (*pos == '}')
|
|
return Result{std::move(object), pos+1};
|
|
else
|
|
throw runtime_error("unable to parse object, expected ',' or '}'");
|
|
}
|
|
}
|
|
throw runtime_error("Could not parse json");
|
|
}
|
|
|
|
std::tuple<Value, const char*>
|
|
parse_json(StringView json) { return parse_json(json.begin(), json.end()); }
|
|
|
|
void JsonUI::eval_json(const Value& json)
|
|
{
|
|
if (not json.is_a<JsonObject>())
|
|
throw runtime_error("json request is not an object");
|
|
|
|
const JsonObject& object = json.as<JsonObject>();
|
|
auto json_it = object.find("jsonrpc");
|
|
if (json_it == object.end() or json_it->value.as<String>() != "2.0")
|
|
throw runtime_error("invalid json rpc request");
|
|
|
|
auto method_it = object.find("method");
|
|
if (method_it == object.end())
|
|
throw runtime_error("invalid json rpc request (method missing)");
|
|
StringView method = method_it->value.as<String>();
|
|
|
|
auto params_it = object.find("params");
|
|
if (params_it == object.end())
|
|
throw runtime_error("invalid json rpc request (params missing)");
|
|
const JsonArray& params = params_it->value.as<JsonArray>();
|
|
|
|
if (method == "keys")
|
|
{
|
|
for (auto& key_val : params)
|
|
{
|
|
for (auto& key : parse_keys(key_val.as<String>()))
|
|
m_on_key(key);
|
|
}
|
|
}
|
|
else if (method == "resize")
|
|
{
|
|
if (params.size() != 2)
|
|
throw runtime_error("resize expects 2 parameters");
|
|
|
|
DisplayCoord dim{params[0].as<int>(), params[1].as<int>()};
|
|
m_dimensions = dim;
|
|
m_on_key(resize(dim));
|
|
}
|
|
else
|
|
throw runtime_error("unknown method");
|
|
}
|
|
|
|
void JsonUI::parse_requests(EventMode mode)
|
|
{
|
|
constexpr size_t bufsize = 1024;
|
|
char buf[bufsize];
|
|
while (fd_readable(0))
|
|
{
|
|
ssize_t size = ::read(0, buf, bufsize);
|
|
if (size == -1 or size == 0)
|
|
break;
|
|
|
|
m_requests += StringView{buf, buf + size};
|
|
}
|
|
|
|
if (not m_on_key)
|
|
return;
|
|
|
|
while (not m_requests.empty())
|
|
{
|
|
const char* pos = nullptr;
|
|
try
|
|
{
|
|
Value json;
|
|
std::tie(json, pos) = parse_json(m_requests);
|
|
if (json)
|
|
eval_json(json);
|
|
}
|
|
catch (runtime_error& error)
|
|
{
|
|
write(2, format("error while handling requests '{}': '{}'",
|
|
m_requests, error.what()));
|
|
// try to salvage request by dropping its first line
|
|
pos = std::min(m_requests.end(), find(m_requests, '\n')+1);
|
|
}
|
|
if (not pos)
|
|
break; // unterminated request ?
|
|
|
|
m_requests = String{pos, m_requests.end()};
|
|
}
|
|
}
|
|
|
|
UnitTest test_json_parser{[]()
|
|
{
|
|
{
|
|
auto value = std::get<0>(parse_json(R"({ "jsonrpc": "2.0", "method": "keys", "params": [ "b", "l", "a", "h" ] })"));
|
|
kak_assert(value);
|
|
}
|
|
|
|
{
|
|
auto value = std::get<0>(parse_json("[10,20]"));
|
|
kak_assert(value and value.is_a<JsonArray>());
|
|
kak_assert(value.as<JsonArray>().at(1).as<int>() == 20);
|
|
}
|
|
|
|
{
|
|
auto value = std::get<0>(parse_json("{}"));
|
|
kak_assert(value and value.is_a<JsonObject>());
|
|
kak_assert(value.as<JsonObject>().empty());
|
|
}
|
|
}};
|
|
|
|
}
|