forked from OctaForge/libcubescript
93 lines
2.3 KiB
C++
93 lines
2.3 KiB
C++
#ifdef CS_REPL_USE_LINENOISE
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#ifdef OSTD_PLATFORM_POSIX
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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 <ostd/string.hh>
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#include <ostd/maybe.hh>
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#include "linenoise.hh"
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static CsState *ln_cs = nullptr;
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#ifdef CS_REPL_HAS_COMPLETE
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static void ln_complete(char const *buf, linenoiseCompletions *lc) {
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ostd::ConstCharRange cmd = get_complete_cmd(buf);
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for (auto id: ln_cs->get_idents()) {
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if (!id->is_command()) {
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continue;
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}
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ostd::ConstCharRange 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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linenoiseAddCompletion(lc, idname.data());
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}
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}
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}
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#endif /* CS_REPL_HAS_COMPLETE */
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#ifdef CS_REPL_HAS_HINTS
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static char *ln_hint(char const *buf, int *color, int *bold) {
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CsCommand *cmd = get_hint_cmd(*ln_cs, buf);
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if (!cmd) {
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return nullptr;
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}
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ostd::String args = " [";
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fill_cmd_args(args, cmd->get_args());
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args += ']';
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*color = 35;
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*bold = 1;
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char *ret = new char[args.size() + 1];
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memcpy(ret, args.data(), args.size() + 1);
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return ret;
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}
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static void ln_hint_free(void *hint) {
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delete[] static_cast<char *>(hint);
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}
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#endif /* CS_REPL_HAS_HINTS */
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static void init_lineedit(CsState &cs, ostd::ConstCharRange) {
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/* sensible default history size */
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linenoiseHistorySetMaxLen(1000);
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ln_cs = &cs;
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#ifdef CS_REPL_HAS_COMPLETE
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linenoiseSetCompletionCallback(ln_complete);
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#endif
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#ifdef CS_REPL_HAS_HINTS
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linenoiseSetHintsCallback(ln_hint);
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linenoiseSetFreeHintsCallback(ln_hint_free);
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#endif
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}
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static ostd::Maybe<ostd::String> read_line(CsState &, CsSvar *pr) {
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auto line = linenoise(pr->get_value().data());
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if (!line) {
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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 ostd::nothing;
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}
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return ostd::String();
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}
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ostd::String ret = line;
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linenoiseFree(line);
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return ostd::move(ret);
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}
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static void add_history(CsState &, ostd::ConstCharRange line) {
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/* backed by ostd::String so it's terminated */
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linenoiseHistoryAdd(line.data());
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}
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#endif
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#endif
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#endif
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