forked from OctaForge/libcubescript
89 lines
2.1 KiB
C++
89 lines
2.1 KiB
C++
#ifdef CS_REPL_USE_READLINE
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#ifndef CS_REPL_HAS_EDIT
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#define CS_REPL_HAS_EDIT
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/* use the GNU readline library */
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#include <string.h>
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#include <optional>
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#include <ostd/string.hh>
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#include <readline/readline.h>
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#include <readline/history.h>
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static cs_state *rd_cs = nullptr;
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inline char *ln_complete_list(char const *buf, int state) {
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static ostd::string_range cmd;
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static ostd::iterator_range<cs_ident **> itr;
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if (!state) {
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cmd = get_complete_cmd(buf);
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itr = rd_cs->get_idents();
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}
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for (; !itr.empty(); itr.pop_front()) {
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cs_ident *id = itr.front();
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if (!id->is_command()) {
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continue;
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}
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ostd::string_range idname = id->get_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.slice(0, cmd.size()) == cmd) {
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itr.pop_front();
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return strdup(idname.data());
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}
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}
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return nullptr;
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}
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inline char **ln_complete(char const *buf, int, int) {
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rl_attempted_completion_over = 1;
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return rl_completion_matches(buf, ln_complete_list);
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}
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inline void ln_hint() {
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cs_command *cmd = get_hint_cmd(*rd_cs, rl_line_buffer);
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if (!cmd) {
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rl_redisplay();
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return;
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}
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std::string old = rl_line_buffer;
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std::string args = old;
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args += " [";
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fill_cmd_args(args, cmd->get_args());
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args += "] ";
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rl_extend_line_buffer(args.size());
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rl_replace_line(args.data(), 0);
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rl_redisplay();
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rl_replace_line(old.data(), 0);
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}
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inline void init_lineedit(cs_state &cs, ostd::string_range) {
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rd_cs = &cs;
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rl_attempted_completion_function = ln_complete;
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rl_redisplay_function = ln_hint;
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}
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inline std::optional<std::string> read_line(cs_state &, cs_svar *pr) {
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auto line = readline(pr->get_value().data());
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if (!line) {
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return std::string();
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}
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std::string ret = line;
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free(line);
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return std::move(ret);
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}
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inline void add_history(cs_state &, ostd::string_range line) {
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/* backed by std::string so it's terminated */
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add_history(line.data());
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}
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#endif
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#endif
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