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refactor(lua): use a keyset for vim.diff opts parsing

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This commit is contained in:
bfredl
2024-02-11 19:13:38 +01:00
parent 0353dd3029
commit 1a3a8d903e
4 changed files with 93 additions and 114 deletions
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175
src/nvim/lua/xdiff.c
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@@ -5,7 +5,9 @@
#include <string.h>
#include "luaconf.h"
#include "nvim/api/keysets_defs.h"
#include "nvim/api/private/defs.h"
#include "nvim/api/private/dispatch.h"
#include "nvim/api/private/helpers.h"
#include "nvim/linematch.h"
#include "nvim/lua/converter.h"
@@ -187,137 +189,84 @@ static mmfile_t get_string_arg(lua_State *lstate, int idx)
return mf;
}
// Helper function for validating option types
static bool check_xdiff_opt(ObjectType actType, ObjectType expType, const char *name, Error *err)
{
if (actType != expType) {
const char *type_str =
expType == kObjectTypeString
? "string" : (expType == kObjectTypeInteger
? "integer" : (expType == kObjectTypeBoolean
? "boolean" : (expType == kObjectTypeLuaRef
? "function" : "NA")));
api_set_error(err, kErrorTypeValidation, "%s is not a %s", name,
type_str);
return true;
}
return false;
}
static NluaXdiffMode process_xdl_diff_opts(lua_State *lstate, xdemitconf_t *cfg, xpparam_t *params,
int64_t *linematch, Error *err)
{
// TODO: this is very much a keydict..
const DictionaryOf(LuaRef) opts = nlua_pop_Dictionary(lstate, true, NULL, err);
Dict(xdl_diff) opts = KEYDICT_INIT;
char *err_param = NULL;
KeySetLink *KeyDict_xdl_diff_get_field(const char *str, size_t len);
nlua_pop_keydict(lstate, &opts, KeyDict_xdl_diff_get_field, &err_param, NULL, err);
NluaXdiffMode mode = kNluaXdiffModeUnified;
bool had_on_hunk = false;
bool had_result_type_indices = false;
for (size_t i = 0; i < opts.size; i++) {
String k = opts.items[i].key;
Object *v = &opts.items[i].value;
if (strequal("on_hunk", k.data)) {
if (check_xdiff_opt(v->type, kObjectTypeLuaRef, "on_hunk", err)) {
goto exit_1;
}
had_on_hunk = true;
nlua_pushref(lstate, v->data.luaref);
} else if (strequal("result_type", k.data)) {
if (check_xdiff_opt(v->type, kObjectTypeString, "result_type", err)) {
goto exit_1;
}
if (strequal("unified", v->data.string.data)) {
// the default
} else if (strequal("indices", v->data.string.data)) {
had_result_type_indices = true;
} else {
api_set_error(err, kErrorTypeValidation, "not a valid result_type");
goto exit_1;
}
} else if (strequal("algorithm", k.data)) {
if (check_xdiff_opt(v->type, kObjectTypeString, "algorithm", err)) {
goto exit_1;
}
if (strequal("myers", v->data.string.data)) {
// default
} else if (strequal("minimal", v->data.string.data)) {
params->flags |= XDF_NEED_MINIMAL;
} else if (strequal("patience", v->data.string.data)) {
params->flags |= XDF_PATIENCE_DIFF;
} else if (strequal("histogram", v->data.string.data)) {
params->flags |= XDF_HISTOGRAM_DIFF;
} else {
api_set_error(err, kErrorTypeValidation, "not a valid algorithm");
goto exit_1;
}
} else if (strequal("ctxlen", k.data)) {
if (check_xdiff_opt(v->type, kObjectTypeInteger, "ctxlen", err)) {
goto exit_1;
}
cfg->ctxlen = (long)v->data.integer;
} else if (strequal("interhunkctxlen", k.data)) {
if (check_xdiff_opt(v->type, kObjectTypeInteger, "interhunkctxlen",
err)) {
goto exit_1;
}
cfg->interhunkctxlen = (long)v->data.integer;
} else if (strequal("linematch", k.data)) {
if (v->type == kObjectTypeBoolean) {
*linematch = v->data.boolean ? INT64_MAX : 0;
} else if (v->type == kObjectTypeInteger) {
*linematch = v->data.integer;
} else {
api_set_error(err, kErrorTypeValidation, "linematch must be a boolean or integer");
goto exit_1;
}
if (HAS_KEY(&opts, xdl_diff, result_type)) {
if (strequal("unified", opts.result_type.data)) {
// the default
} else if (strequal("indices", opts.result_type.data)) {
had_result_type_indices = true;
} else {
struct {
const char *name;
unsigned long value;
} flags[] = {
{ "ignore_whitespace", XDF_IGNORE_WHITESPACE },
{ "ignore_whitespace_change", XDF_IGNORE_WHITESPACE_CHANGE },
{ "ignore_whitespace_change_at_eol", XDF_IGNORE_WHITESPACE_AT_EOL },
{ "ignore_cr_at_eol", XDF_IGNORE_CR_AT_EOL },
{ "ignore_blank_lines", XDF_IGNORE_BLANK_LINES },
{ "indent_heuristic", XDF_INDENT_HEURISTIC },
{ NULL, 0 },
};
bool key_used = false;
for (size_t j = 0; flags[j].name; j++) {
if (strequal(flags[j].name, k.data)) {
if (check_xdiff_opt(v->type, kObjectTypeBoolean, flags[j].name,
err)) {
goto exit_1;
}
if (v->data.boolean) {
params->flags |= flags[j].value;
}
key_used = true;
break;
}
}
if (key_used) {
continue;
}
api_set_error(err, kErrorTypeValidation, "unexpected key: %s", k.data);
api_set_error(err, kErrorTypeValidation, "not a valid result_type");
goto exit_1;
}
}
if (had_on_hunk) {
if (HAS_KEY(&opts, xdl_diff, algorithm)) {
if (strequal("myers", opts.algorithm.data)) {
// default
} else if (strequal("minimal", opts.algorithm.data)) {
params->flags |= XDF_NEED_MINIMAL;
} else if (strequal("patience", opts.algorithm.data)) {
params->flags |= XDF_PATIENCE_DIFF;
} else if (strequal("histogram", opts.algorithm.data)) {
params->flags |= XDF_HISTOGRAM_DIFF;
} else {
api_set_error(err, kErrorTypeValidation, "not a valid algorithm");
goto exit_1;
}
}
if (HAS_KEY(&opts, xdl_diff, ctxlen)) {
cfg->ctxlen = (long)opts.ctxlen;
}
if (HAS_KEY(&opts, xdl_diff, interhunkctxlen)) {
cfg->interhunkctxlen = (long)opts.interhunkctxlen;
}
if (HAS_KEY(&opts, xdl_diff, linematch)) {
if (opts.linematch.type == kObjectTypeBoolean) {
*linematch = opts.linematch.data.boolean ? INT64_MAX : 0;
} else if (opts.linematch.type == kObjectTypeInteger) {
*linematch = opts.linematch.data.integer;
} else {
api_set_error(err, kErrorTypeValidation, "linematch must be a boolean or integer");
goto exit_1;
}
}
params->flags |= opts.ignore_whitespace ? XDF_IGNORE_WHITESPACE : 0;
params->flags |= opts.ignore_whitespace_change ? XDF_IGNORE_WHITESPACE_CHANGE : 0;
params->flags |= opts.ignore_whitespace_change_at_eol ? XDF_IGNORE_WHITESPACE_AT_EOL : 0;
params->flags |= opts.ignore_cr_at_eol ? XDF_IGNORE_CR_AT_EOL : 0;
params->flags |= opts.ignore_blank_lines ? XDF_IGNORE_BLANK_LINES : 0;
params->flags |= opts.indent_heuristic ? XDF_INDENT_HEURISTIC : 0;
if (HAS_KEY(&opts, xdl_diff, on_hunk)) {
mode = kNluaXdiffModeOnHunkCB;
nlua_pushref(lstate, opts.on_hunk);
if (lua_type(lstate, -1) != LUA_TFUNCTION) {
api_set_error(err, kErrorTypeValidation, "on_hunk is not a function");
}
} else if (had_result_type_indices) {
mode = kNluaXdiffModeLocations;
}
exit_1:
api_free_dictionary(opts);
api_free_string(opts.result_type);
api_free_string(opts.algorithm);
api_free_luaref(opts.on_hunk);
return mode;
}