75 lines
1.9 KiB
C++
75 lines
1.9 KiB
C++
#ifdef CS_REPL_USE_LINENOISE
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#ifndef CS_REPL_HAS_EDIT
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#define CS_REPL_HAS_EDIT
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/* use the bundled linenoise library, default */
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#include <errno.h>
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#include <ctype.h>
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#include <signal.h>
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#include <optional>
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#include "linenoise.hh"
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static cs::state *ln_cs = nullptr;
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inline void ln_complete(char const *buf, std::vector<std::string> &lc) {
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std::string_view cmd = get_complete_cmd(buf);
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for (std::size_t i = 0; i < ln_cs->ident_count(); ++i) {
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auto &id = ln_cs->get_ident(i);
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if (id.type() != cs::ident_type::COMMAND) {
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continue;
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}
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std::string_view idname = id.name();
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if (idname.size() <= cmd.size()) {
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continue;
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}
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if (idname.substr(0, cmd.size()) == cmd) {
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lc.emplace_back(idname);
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}
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}
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}
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inline std::string ln_hint(char const *buf, int &color, int &bold) {
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cs::command *cmd = get_hint_cmd(*ln_cs, buf);
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if (!cmd) {
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return std::string{};
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}
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std::string args = " [";
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fill_cmd_args(args, cmd->args());
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args += ']';
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color = 35;
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bold = 1;
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return args;
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}
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inline void init_lineedit(cs::state &cs, std::string_view) {
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/* sensible default history size */
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linenoise::SetHistoryMaxLen(1000);
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ln_cs = &cs;
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linenoise::SetCompletionCallback(ln_complete);
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linenoise::SetHintsCallback(ln_hint);
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}
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inline std::optional<std::string> read_line(cs::state &s, cs::builtin_var &pr) {
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std::string line;
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auto quit = linenoise::Readline(pr.value().get_string(s).data(), line);
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if (quit) {
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/* linenoise traps ctrl-c, detect it and let the user exit */
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if (errno == EAGAIN) {
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raise(SIGINT);
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return std::nullopt;
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}
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return std::string{};
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}
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return line;
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}
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inline void add_history(cs::state &, std::string_view line) {
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/* backed by std::string so it's terminated */
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linenoise::AddHistory(line.data());
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}
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#endif
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#endif
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