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lsp-parse.c
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lsp-parse.c
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// reading messages from the LSP server
#define LSP_INTERNAL 1
#include "lsp.h"
#include "util.h"
#include "unicode.h"
static WarnUnusedResult bool lsp_expect_type(LSP *lsp, JSONValue value, JSONValueType type, const char *what) {
if (value.type != type) {
lsp_set_error(lsp, "Expected %s for %s, got %s",
json_type_to_str(type),
what,
json_type_to_str(value.type));
return false;
}
return true;
}
static WarnUnusedResult bool lsp_expect_object(LSP *lsp, JSONValue value, const char *what) {
return lsp_expect_type(lsp, value, JSON_OBJECT, what);
}
static WarnUnusedResult bool lsp_expect_array(LSP *lsp, JSONValue value, const char *what) {
return lsp_expect_type(lsp, value, JSON_ARRAY, what);
}
static WarnUnusedResult bool lsp_expect_string(LSP *lsp, JSONValue value, const char *what) {
return lsp_expect_type(lsp, value, JSON_STRING, what);
}
static WarnUnusedResult bool lsp_expect_number(LSP *lsp, JSONValue value, const char *what) {
return lsp_expect_type(lsp, value, JSON_NUMBER, what);
}
static int completion_qsort_cmp(void *context, const void *av, const void *bv) {
const LSPResponse *response = context;
const LSPCompletionItem *a = av, *b = bv;
const char *a_sort_text = lsp_response_string(response, a->sort_text);
const char *b_sort_text = lsp_response_string(response, b->sort_text);
int sort_text_cmp = strcmp(a_sort_text, b_sort_text);
if (sort_text_cmp != 0)
return sort_text_cmp;
// for some reason, rust-analyzer outputs identical sortTexts
// i have no clue what that means.
// the LSP "specification" is not very specific.
// we'll sort by label in this case.
// this is what VSCode seems to do.
// i hate microsofot.
const char *a_label = lsp_response_string(response, a->label);
const char *b_label = lsp_response_string(response, b->label);
return strcmp(a_label, b_label);
}
static bool parse_position(LSP *lsp, const JSON *json, JSONValue pos_value, LSPPosition *pos) {
if (!lsp_expect_object(lsp, pos_value, "document position"))
return false;
JSONObject pos_object = pos_value.val.object;
JSONValue line = json_object_get(json, pos_object, "line");
JSONValue character = json_object_get(json, pos_object, "character");
if (!lsp_expect_number(lsp, line, "document line number")
|| !lsp_expect_number(lsp, character, "document column number"))
return false;
pos->line = (u32)line.val.number;
pos->character = (u32)character.val.number;
return true;
}
static bool parse_range(LSP *lsp, const JSON *json, JSONValue range_value, LSPRange *range) {
if (!lsp_expect_object(lsp, range_value, "document range"))
return false;
JSONObject range_object = range_value.val.object;
JSONValue start = json_object_get(json, range_object, "start");
JSONValue end = json_object_get(json, range_object, "end");
bool success = parse_position(lsp, json, start, &range->start)
&& parse_position(lsp, json, end, &range->end);
if (!success)
memset(range, 0, sizeof *range);
return success;
}
static bool parse_document_uri(LSP *lsp, const JSON *json, JSONValue value, LSPDocumentID *id) {
if (!lsp_expect_string(lsp, value, "URI"))
return false;
char *string = json_string_get_alloc(json, value.val.string);
if (!str_has_prefix(string, "file://")) {
lsp_set_error(lsp, "Can't process non-local URI %s",
string);
free(string);
return false;
}
char *path;
#if _WIN32
path = string + strlen("file:///");
#else
path = string + strlen("file://");
#endif
// replace percent-encoded sequences (e.g. replace %20 with ' ')
char *out = path;
for (const char *in = path; *in; ) {
char c = *in++;
if (c == '%') {
char sequence[3] = {0};
if (!in[0] || !in[1] || !isxdigit(in[0]) || !isxdigit(in[1])) {
lsp_set_error(lsp, "Bad escape sequence in URI.");
free(string);
return false;
}
sequence[0] = in[0];
sequence[1] = in[1];
in += 2;
long byte = strtol(sequence, NULL, 16);
assert(byte >= 0 && byte <= 255);
c = (char)byte;
}
#if _WIN32
// replace forward slashes with backslashes for consistency
if (c == '/') c = '\\';
#endif
*out++ = c;
}
*out = '\0';
*id = lsp_document_id(lsp, path);
free(string);
return true;
}
static uint32_t *parse_trigger_characters(const JSON *json, JSONArray trigger_chars) {
uint32_t *array = NULL;
arr_reserve(array, trigger_chars.len);
for (u32 i = 0; i < trigger_chars.len; ++i) {
char character[8] = {0};
json_string_get(json,
json_array_get_string(json, trigger_chars, i),
character,
sizeof character);
if (*character) {
// the fact that they're called "trigger characters" makes
// me think multi-character triggers aren't allowed
// even though that would be nice in some languages,
// e.g. "::"
char32_t c = 0;
unicode_utf8_to_utf32(&c, character, strlen(character));
if (c) arr_add(array, c);
}
}
return array;
}
static void parse_capabilities(LSP *lsp, const JSON *json, JSONObject capabilities) {
LSPCapabilities *cap = &lsp->capabilities;
{
// document syncing capabilities
JSONValue sync_value = json_object_get(json, capabilities, "textDocumentSync");
double change_type_double = sync_value.type == JSON_NUMBER
? sync_value.val.number
: json_object_get_number(json, json_force_object(sync_value), "change");
int change_type = isfinite(change_type_double)
&& change_type_double >= 0
&& change_type_double <= 2
? (int)change_type_double
: 0;
bool open_close = true;
if (sync_value.type == JSON_NUMBER) {
// nothing to do.
// i think. it's unclear whether we're supposed to send didOpen/didClose
// with this type (it's deprecated, so the spec isn't giving us any information)
} else if (sync_value.type == JSON_OBJECT) {
JSONObject sync = sync_value.val.object;
open_close = json_object_get_bool(json, sync, "openClose", false);
if (!open_close) {
// we're not even allowed to send didChange without a didOpen first,
// so this should always be zero? spec is really unclear here.
change_type = 0;
}
}
cap->open_close_support = open_close;
cap->sync_support = change_type >= 1;
cap->incremental_sync_support = change_type == 2;
}
// check CompletionOptions
JSONValue completion_value = json_object_get(json, capabilities, "completionProvider");
if (completion_value.type == JSON_OBJECT && completion_value.type != JSON_FALSE) {
cap->completion_support = true;
JSONObject completion = completion_value.val.object;
JSONArray trigger_chars = json_object_get_array(json, completion, "triggerCharacters");
lsp->completion_trigger_chars = parse_trigger_characters(json, trigger_chars);
}
// check SignatureHelpOptions
JSONValue signature_help_value = json_object_get(json, capabilities, "signatureHelpProvider");
if (signature_help_value.type == JSON_OBJECT && signature_help_value.type != JSON_FALSE) {
cap->signature_help_support = true;
JSONObject signature_help = signature_help_value.val.object;
JSONArray trigger_chars = json_object_get_array(json, signature_help, "triggerCharacters");
lsp->signature_help_trigger_chars = parse_trigger_characters(json, trigger_chars);
JSONArray retrigger_chars = json_object_get_array(json, signature_help, "retriggerCharacters");
lsp->signature_help_retrigger_chars = parse_trigger_characters(json, retrigger_chars);
// rust-analyzer doesn't have ) or > as a retrigger char which is really weird
arr_add(lsp->signature_help_retrigger_chars, ')');
arr_add(lsp->signature_help_retrigger_chars, '>');
}
// check for textDocument/hover support
JSONValue hover_value = json_object_get(json, capabilities, "hoverProvider");
if (hover_value.type != JSON_UNDEFINED && hover_value.type != JSON_FALSE) {
cap->hover_support = true;
}
// check for textDocument/definition support
JSONValue definition_value = json_object_get(json, capabilities, "definitionProvider");
if (definition_value.type != JSON_UNDEFINED && definition_value.type != JSON_FALSE) {
cap->definition_support = true;
}
// check for textDocument/declaration support
JSONValue declaration_value = json_object_get(json, capabilities, "declarationProvider");
if (declaration_value.type != JSON_UNDEFINED && declaration_value.type != JSON_FALSE) {
cap->declaration_support = true;
}
// check for textDocument/typeDefinition support
JSONValue type_definition_value = json_object_get(json, capabilities, "typeDefinitionProvider");
if (type_definition_value.type != JSON_UNDEFINED && type_definition_value.type != JSON_FALSE) {
cap->type_definition_support = true;
}
// check for textDocument/implementation support
JSONValue implementation_value = json_object_get(json, capabilities, "implementationProvider");
if (implementation_value.type != JSON_UNDEFINED && implementation_value.type != JSON_FALSE) {
cap->implementation_support = true;
}
// check for textDocument/documentHighlight support
JSONValue highlight_value = json_object_get(json, capabilities, "documentHighlightProvider");
if (highlight_value.type != JSON_UNDEFINED && highlight_value.type != JSON_FALSE) {
cap->highlight_support = true;
}
// check for textDocument/references support
JSONValue references_value = json_object_get(json, capabilities, "referencesProvider");
if (references_value.type != JSON_UNDEFINED && references_value.type != JSON_FALSE) {
cap->references_support = true;
}
// check for textDocument/rename support
JSONValue rename_value = json_object_get(json, capabilities, "renameProvider");
if (rename_value.type != JSON_UNDEFINED && rename_value.type != JSON_FALSE) {
cap->rename_support = true;
}
// check for textDocument/documentLink support
JSONValue document_link_value = json_object_get(json, capabilities, "documentLinkProvider");
if (document_link_value.type == JSON_OBJECT) {
cap->document_link_support = true;
}
// check for workspace/symbol support
JSONValue workspace_symbol_value = json_object_get(json, capabilities, "workspaceSymbolProvider");
if (workspace_symbol_value.type != JSON_UNDEFINED && workspace_symbol_value.type != JSON_FALSE) {
cap->workspace_symbols_support = true;
}
JSONValue formatting_value = json_object_get(json, capabilities, "documentFormattingProvider");
if (formatting_value.type == JSON_OBJECT || formatting_value.type == JSON_TRUE) {
cap->formatting_support = true;
}
JSONValue range_formatting_value = json_object_get(json, capabilities, "documentRangeFormattingProvider");
if (range_formatting_value.type == JSON_OBJECT || range_formatting_value.type == JSON_TRUE) {
cap->range_formatting_support = true;
}
JSONObject workspace = json_object_get_object(json, capabilities, "workspace");
// check WorkspaceFoldersServerCapabilities
JSONObject workspace_folders = json_object_get_object(json, workspace, "workspaceFolders");
if (json_object_get_bool(json, workspace_folders, "supported", false)) {
cap->workspace_folders_support = true;
}
}
static JSONString get_markup_content(const JSON *json, JSONValue markup_value) {
// some fields are of type string | MarkupContent (e.g. completion documentation)
// this converts either one to a string.
if (markup_value.type == JSON_STRING) {
return markup_value.val.string;
} else if (markup_value.type == JSON_OBJECT) {
return json_object_get_string(json, markup_value.val.object, "value");
} else {
return (JSONString){0};
}
}
static bool parse_text_edit(LSP *lsp, LSPResponse *response, const JSON *json, JSONValue value, LSPTextEdit *edit) {
JSONObject object = json_force_object(value);
JSONValue range = json_object_get(json, object, "range");
if (!parse_range(lsp, json, range, &edit->range))
return false;
JSONValue new_text_value = json_object_get(json, object, "newText");
if (!lsp_expect_string(lsp, new_text_value, "completion newText"))
return false;
edit->new_text = lsp_response_add_json_string(response,
json, new_text_value.val.string);
return true;
}
static bool parse_completion_response(LSP *lsp, const JSON *json, LSPResponse *response) {
// deal with textDocument/completion response.
// result: CompletionItem[] | CompletionList | null
LSPResponseCompletion *completion = &response->data.completion;
JSONValue result = json_get(json, "result");
JSONValue items_value = {0};
completion->is_complete = true; // default
switch (result.type) {
case JSON_NULL:
// no completions
return true;
case JSON_ARRAY:
items_value = result;
break;
case JSON_OBJECT:
items_value = json_object_get(json, result.val.object, "items");
completion->is_complete = !json_object_get_bool(json, result.val.object, "isIncomplete", false);
break;
default:
lsp_set_error(lsp, "Weird result type for textDocument/completion response: %s.", json_type_to_str(result.type));
break;
}
if (!lsp_expect_array(lsp, items_value, "completion list"))
return false;
JSONArray items = items_value.val.array;
arr_set_len(completion->items, items.len);
for (u32 item_idx = 0; item_idx < items.len; ++item_idx) {
LSPCompletionItem *item = &completion->items[item_idx];
JSONValue item_value = json_array_get(json, items, item_idx);
if (!lsp_expect_object(lsp, item_value, "completion list"))
return false;
JSONObject item_object = item_value.val.object;
JSONValue label_value = json_object_get(json, item_object, "label");
if (!lsp_expect_string(lsp, label_value, "completion label"))
return false;
JSONString label = label_value.val.string;
item->label = lsp_response_add_json_string(response, json, label);
// defaults
item->sort_text = item->label;
item->filter_text = item->label;
item->edit_type = LSP_COMPLETION_EDIT_PLAIN;
item->at_cursor = true;
item->text_edit = (LSPTextEdit) {
.range = {{0}, {0}},
.new_text = item->label
};
double kind = json_object_get_number(json, item_object, "kind");
if (isfinite(kind) && kind >= LSP_COMPLETION_KIND_MIN && kind <= LSP_COMPLETION_KIND_MAX) {
item->kind = (LSPCompletionKind)kind;
}
JSONString sort_text = json_object_get_string(json, item_object, "sortText");
if (sort_text.pos) {
// LSP allows using a different string for sorting.
item->sort_text = lsp_response_add_json_string(response, json, sort_text);
}
JSONValue deprecated = json_object_get(json, item_object, "deprecated");
if (deprecated.type == JSON_TRUE) {
item->deprecated = true;
}
JSONArray tags = json_object_get_array(json, item_object, "tags");
for (u32 i = 0; i < tags.len; ++i) {
double tag = json_array_get_number(json, tags, i);
if (tag == LSP_SYMBOL_TAG_DEPRECATED) {
item->deprecated = true;
}
}
JSONString filter_text = json_object_get_string(json, item_object, "filterText");
if (filter_text.pos) {
// LSP allows using a different string for filtering.
item->filter_text = lsp_response_add_json_string(response, json, filter_text);
}
double edit_type = json_object_get_number(json, item_object, "insertTextFormat");
if (!isnan(edit_type)) {
if (edit_type != LSP_COMPLETION_EDIT_PLAIN && edit_type != LSP_COMPLETION_EDIT_SNIPPET) {
// maybe in the future more edit types will be added.
// probably they'll have associated capabilities, but I think it's best to just ignore unrecognized types
debug_println("Bad InsertTextFormat: %g", edit_type);
edit_type = LSP_COMPLETION_EDIT_PLAIN;
}
item->edit_type = (LSPCompletionEditType)edit_type;
}
JSONValue documentation_value = json_object_get(json, item_object, "documentation");
JSONString documentation = get_markup_content(json, documentation_value);
if (documentation.len) {
if (documentation.len > 1000) {
// rust has some docs which are *20,000* bytes long
// that's more than i'm ever gonna show on-screen!
documentation.len = 1000;
// okay this could break mid-code-point but whatever it would probably
// just display ⌷.
}
item->documentation = lsp_response_add_json_string(response, json, documentation);
}
JSONString detail_text = json_object_get_string(json, item_object, "detail");
if (detail_text.pos) {
item->detail = lsp_response_add_json_string(response, json, detail_text);
}
// @TODO(eventually): additionalTextEdits
// (try to find a case where this comes up)
// what should happen when this completion is selected?
JSONValue text_edit_value = json_object_get(json, item_object, "textEdit");
if (text_edit_value.type == JSON_OBJECT) {
item->at_cursor = false;
if (!parse_text_edit(lsp, response, json, text_edit_value, &item->text_edit))
return false;
} else {
// not using textEdit. check insertText.
JSONValue insert_text_value = json_object_get(json, item_object, "insertText");
if (insert_text_value.type == JSON_STRING) {
// string which will be inserted if this completion is selected
item->text_edit.new_text = lsp_response_add_json_string(response,
json, insert_text_value.val.string);
}
}
}
qsort_with_context(completion->items, items.len, sizeof *completion->items,
completion_qsort_cmp, response);
return true;
}
static bool parse_signature_help_response(LSP *lsp, const JSON *json, LSPResponse *response) {
JSONObject result = json_force_object(json_get(json, "result"));
//json_debug_print_object(json, result);printf("\n");
LSPResponseSignatureHelp *help = &response->data.signature_help;
u32 active_signature = 0;
double active_signature_dbl = json_object_get_number(json, result, "activeSignature");
if (isfinite(active_signature_dbl))
active_signature = (u32)active_signature_dbl;
double global_active_parameter = json_object_get_number(json, result, "activeParameter");
JSONArray signatures = json_object_get_array(json, result, "signatures");
if (active_signature >= signatures.len)
active_signature = 0;
for (u32 s = 0; s < signatures.len; ++s) {
// parse SignatureInformation
LSPSignatureInformation *signature_out = arr_addp(help->signatures);
JSONObject signature_in = json_array_get_object(json, signatures, s);
JSONString label = json_object_get_string(json, signature_in, "label");
signature_out->label = lsp_response_add_json_string(response, json, label);
size_t label_len_utf16 = unicode_utf16_len(lsp_response_string(response, signature_out->label));
if (label_len_utf16 == (size_t)-1) {
lsp_set_error(lsp, "Bad UTF-8 in SignatureInformation.label");
return false;
}
#if 0
// currently we don't show signature documentation
JSONString documentation = get_markup_content(json,
json_object_get(json, signature_in, "documentation"));
if (documentation.len)
signature_out->documentation = lsp_response_add_json_string(response, json, documentation);
#endif
JSONArray parameters = json_object_get_array(json, signature_in, "parameters");
u32 active_parameter = U32_MAX;
double active_parameter_dbl = json_object_get_number(json, signature_in, "activeParameter");
if (isfinite(active_parameter_dbl)) {
active_parameter = (u32)active_parameter_dbl;
}
if (active_parameter == U32_MAX &&
isfinite(global_active_parameter)) {
active_parameter = (u32)global_active_parameter;
}
if (active_parameter < parameters.len) {
JSONObject parameter_info = json_array_get_object(json, parameters, active_parameter);
JSONValue parameter_label_value = json_object_get(json, parameter_info, "label");
u16 start = 0, end = 0;
// parse the parameter label
if (parameter_label_value.type == JSON_ARRAY) {
// parameter label is specified as UTF-16 character range
JSONArray parameter_label = parameter_label_value.val.array;
double start_dbl = json_array_get_number(json, parameter_label, 0);
double end_dbl = json_array_get_number(json, parameter_label, 1);
if (!(isfinite(start_dbl) && isfinite(end_dbl))) {
lsp_set_error(lsp, "Bad contents of ParameterInfo.label array.");
return false;
}
start = (u16)start_dbl;
end = (u16)end_dbl;
} else if (parameter_label_value.type == JSON_STRING) {
// parameter label is specified as substring
JSONString parameter_label = parameter_label_value.val.string;
char *sig_lbl = json_string_get_alloc(json, label);
char *param_lbl = json_string_get_alloc(json, parameter_label);
const char *pos = strstr(sig_lbl, param_lbl);
if (pos) {
start = (u16)(pos - sig_lbl);
end = (u16)(start + strlen(param_lbl));
}
free(sig_lbl);
free(param_lbl);
} else {
lsp_set_error(lsp, "Bad type for ParameterInfo.label");
return false;
}
if (start > end || end > label_len_utf16) {
lsp_set_error(lsp, "Bad range for ParameterInfo.label: %u-%u within signature label of length %u", start, end, label.len);
return false;
}
signature_out->active_start = start;
signature_out->active_end = end;
}
}
if (active_signature != 0) {
//make sure active signature is #0
LSPSignatureInformation active = help->signatures[active_signature];
arr_remove(help->signatures, active_signature);
arr_insert(help->signatures, 0, active);
}
return true;
}
static bool parse_hover_response(LSP *lsp, const JSON *json, LSPResponse *response) {
LSPResponseHover *hover = &response->data.hover;
JSONValue result_value = json_get(json, "result");
if (result_value.type == JSON_NULL)
return true; // no results
if (result_value.type != JSON_OBJECT) {
lsp_set_error(lsp, "Bad result type for textDocument/hover response.");
return false;
}
JSONObject result = json_force_object(result_value);
JSONValue range = json_object_get(json, result, "range");
if (range.type != JSON_UNDEFINED)
parse_range(lsp, json, range, &hover->range);
JSONValue contents = json_object_get(json, result, "contents");
switch (contents.type) {
case JSON_OBJECT:
case JSON_STRING:
// all good
break;
case JSON_ARRAY: {
JSONArray contents_array = contents.val.array;
if (contents_array.len == 0) {
// the server probably should have just returned result: null.
// but the spec doesn't seem to forbid this, so we'll handle it.
return true;
}
// it's giving us multiple strings, but we'll just show the first one
contents = json_array_get(json, contents_array, 0);
} break;
default:
lsp_set_error(lsp, "Bad contents field on textDocument/hover response.");
return false;
}
// contents should either be a MarkupContent or a MarkedString
// i.e. it is either a string or has a member `value: string`
JSONString contents_string = {0};
if (contents.type == JSON_STRING) {
contents_string = contents.val.string;
} else {
JSONObject contents_object = json_force_object(contents);
JSONValue value = json_object_get(json, contents_object, "value");
if (value.type == JSON_STRING) {
contents_string = value.val.string;
} else {
lsp_set_error(lsp, "Bad contents object in textDocument/hover response.");
return false;
}
}
hover->contents = lsp_response_add_json_string(response, json, contents_string);
return true;
}
// parse a Location or a LocationLink
static bool parse_location(LSP *lsp, const JSON *json, JSONValue value, LSPLocation *location) {
if (!lsp_expect_object(lsp, value, "Location"))
return false;
JSONObject object = value.val.object;
JSONValue uri = json_object_get(json, object, "uri");
JSONValue range = json_object_get(json, object, "range");
if (uri.type == JSON_UNDEFINED) {
// maybe it's a LocationLink
uri = json_object_get(json, object, "targetUri");
range = json_object_get(json, object, "targetRange");
}
if (!parse_document_uri(lsp, json, uri, &location->document))
return false;
if (!parse_range(lsp, json, range, &location->range))
return false;
return true;
}
static bool parse_definition_response(LSP *lsp, const JSON *json, LSPResponse *response) {
JSONValue result = json_get(json, "result");
if (result.type == JSON_NULL) {
// no location
return true;
}
LSPResponseDefinition *definition = &response->data.definition;
if (result.type == JSON_ARRAY) {
JSONArray locations = result.val.array;
if (locations.len == 0)
return true;
for (u32 l = 0; l < locations.len; ++l) {
JSONValue location_json = json_array_get(json, locations, l);
LSPLocation *location = arr_addp(definition->locations);
if (!parse_location(lsp, json, location_json, location))
return false;
}
return true;
} else {
LSPLocation *location = arr_addp(definition->locations);
return parse_location(lsp, json, result, location);
}
}
// parses SymbolInformation or WorkspaceSymbol
static bool parse_symbol_information(LSP *lsp, const JSON *json, JSONValue value,
LSPResponse *response, LSPSymbolInformation *info) {
if (!lsp_expect_object(lsp, value, "SymbolInformation"))
return false;
JSONObject object = value.val.object;
// parse name
JSONValue name_value = json_object_get(json, object, "name");
if (!lsp_expect_string(lsp, name_value, "SymbolInformation.name"))
return false;
JSONString name = name_value.val.string;
info->name = lsp_response_add_json_string(response, json, name);
// parse kind
JSONValue kind_value = json_object_get(json, object, "kind");
if (!lsp_expect_number(lsp, kind_value, "SymbolInformation.kind"))
return false;
double kind = kind_value.val.number;
if (isfinite(kind) && kind >= LSP_SYMBOL_KIND_MIN && kind <= LSP_SYMBOL_KIND_MAX)
info->kind = (LSPSymbolKind)kind;
// check if deprecated
bool deprecated = json_object_get(json, object, "deprecated").type == JSON_TRUE;
JSONArray tags = json_object_get_array(json, object, "tags");
for (size_t i = 0; i < tags.len; ++i) {
if (json_array_get_number(json, tags, i) == LSP_SYMBOL_TAG_DEPRECATED)
deprecated = true;
}
info->deprecated = deprecated;
// parse location
JSONValue location = json_object_get(json, object, "location");
if (!parse_location(lsp, json, location, &info->location))
return false;
// get container name
JSONString container = json_object_get_string(json, object, "containerName");
info->container = lsp_response_add_json_string(response, json, container);
return true;
}
static bool parse_workspace_symbols_response(LSP *lsp, const JSON *json, LSPResponse *response) {
LSPResponseWorkspaceSymbols *syms = &response->data.workspace_symbols;
JSONArray result = json_force_array(json_get(json, "result"));
arr_set_len(syms->symbols, result.len);
for (size_t i = 0; i < result.len; ++i) {
LSPSymbolInformation *info = &syms->symbols[i];
JSONValue value = json_array_get(json, result, i);
if (!parse_symbol_information(lsp, json, value, response, info))
return false;
}
return true;
}
// fills request->id/id_string appropriately given the request's json
// returns true on success
static WarnUnusedResult bool parse_id(const JSON *json, LSPRequest *request) {
JSONValue id_value = json_get(json, "id");
switch (id_value.type) {
case JSON_NUMBER: {
double id = id_value.val.number;
if (id == (u32)id) {
request->id = (u32)id;
return true;
}
} break;
case JSON_STRING:
request->id_string = lsp_request_add_json_string(request, json, id_value.val.string);
return true;
default: break;
}
return false;
}
// handles window/showMessage, window/logMessage, and window/showMessageRequest parameters
static bool parse_window_message(LSP *lsp, const JSON *json, LSPRequest *request) {
LSPRequestMessage *m = &request->data.message;
JSONObject params = json_force_object(json_get(json, "params"));
JSONValue type = json_object_get(json, params, "type");
JSONValue message = json_object_get(json, params, "message");
if (!lsp_expect_number(lsp, type, "MessageType"))
return false;
if (!lsp_expect_string(lsp, message, "message string"))
return false;
int mtype = (int)type.val.number;
if (mtype < 1 || mtype > 4) {
lsp_set_error(lsp, "Bad MessageType: %g", type.val.number);
return false;
}
m->type = (LSPWindowMessageType)mtype;
m->message = lsp_request_add_json_string(request, json, message.val.string);
return true;
}
static bool parse_diagnostic(LSP *lsp, LSPRequest *request, const JSON *json, JSONObject diagnostic_in, LSPDiagnostic *diagnostic_out) {
if (!parse_range(lsp, json, json_object_get(json, diagnostic_in, "range"),
&diagnostic_out->range))
return false;
diagnostic_out->message = lsp_request_add_json_string(
request, json,
json_object_get_string(json, diagnostic_in, "message")
);
JSONValue severity_val = json_object_get(json, diagnostic_in, "severity");
LSPDiagnosticSeverity severity = LSP_DIAGNOSTIC_SEVERITY_INFORMATION;
if (severity_val.type == JSON_NUMBER) {
int s = (int)json_force_number(severity_val);
if (s >= LSP_DIAGNOSTIC_SEVERITY_MIN && s <= LSP_DIAGNOSTIC_SEVERITY_MAX) {
severity = (LSPDiagnosticSeverity)s;
}
}
diagnostic_out->severity = severity;
JSONValue code_val = json_object_get(json, diagnostic_in, "code");
if (code_val.type == JSON_NUMBER) {
int code = (int)code_val.val.number;
char string[32] = {0};
strbuf_printf(string, "%d", code);
diagnostic_out->code = lsp_request_add_string(request, string);
} else if (code_val.type == JSON_STRING) {
diagnostic_out->code = lsp_request_add_json_string(request, json, code_val.val.string);
}
JSONObject code_description = json_object_get_object(json, diagnostic_in, "codeDescription");
diagnostic_out->code_description_uri = lsp_request_add_json_string(
request, json,
json_object_get_string(json, code_description, "href")
);
return true;
}
static bool parse_publish_diagnostics(LSP *lsp, const JSON *json, LSPRequest *request) {
LSPRequestPublishDiagnostics *pub = &request->data.publish_diagnostics;
JSONObject params = json_force_object(json_get(json, "params"));
JSONValue uri_val = json_object_get(json, params, "uri");
if (!parse_document_uri(lsp, json, uri_val, &pub->document))
return false;
JSONArray diagnostics = json_object_get_array(json, params, "diagnostics");
for (u32 i = 0; i < diagnostics.len; ++i) {
JSONObject diagnostic_in = json_array_get_object(json, diagnostics, i);
LSPDiagnostic *diagnostic_out = arr_addp(pub->diagnostics);
if (!parse_diagnostic(lsp, request, json, diagnostic_in, diagnostic_out))
return false;
}
return true;
}
// returns true if `request` was actually filled with a request.
static bool parse_server2client_request(LSP *lsp, JSON *json, LSPRequest *request) {
JSONValue method_value = json_get(json, "method");
if (!lsp_expect_string(lsp, method_value, "request method"))
return false;
char method[64] = {0};
json_string_get(json, method_value.val.string, method, sizeof method);
if (streq(method, "window/showMessage")) {
request->type = LSP_REQUEST_SHOW_MESSAGE;
return parse_window_message(lsp, json, request);
} else if (streq(method, "window/showMessageRequest")) {
// we'll deal with the repsonse right here
LSPResponse response = {0};
LSPRequest *r = &response.request;
r->type = LSP_REQUEST_SHOW_MESSAGE;
if (!parse_id(json, request)) {
debug_println("Bad ID in window/showMessageRequest request. This shouldn't happen.");
return false;
}
lsp_send_response(lsp, &response);
request->type = LSP_REQUEST_SHOW_MESSAGE;
return parse_window_message(lsp, json, request);
} else if (streq(method, "window/logMessage")) {
request->type = LSP_REQUEST_LOG_MESSAGE;
return parse_window_message(lsp, json, request);
} else if (streq(method, "workspace/workspaceFolders")) {
// we can deal with this request right here
LSPResponse response = {0};
request = &response.request;
request->type = LSP_REQUEST_WORKSPACE_FOLDERS;
if (!parse_id(json, request)) {
debug_println("Bad ID in workspace/workspaceFolders request. This shouldn't happen.");
return false;
}
lsp_send_response(lsp, &response);
return false;
} else if (str_has_prefix(method, "$/") || str_has_prefix(method, "telemetry/")) {
// we can safely ignore this
} else if (streq(method, "textDocument/publishDiagnostics")) {
request->type = LSP_REQUEST_PUBLISH_DIAGNOSTICS;
return parse_publish_diagnostics(lsp, json, request);
} else if (streq(method, "gdscript_client/changeWorkspace")) {
// i ignore you (this is just a notification)
} else if (streq(method, "gdscript/capabilities")) {
// i ignore you (this is just a notification)
} else {
debug_println("Unrecognized request method: %s", method);
}
return false;
}
static bool parse_workspace_edit(LSP *lsp, LSPResponse *response, const JSON *json, JSONObject object, LSPWorkspaceEdit *edit) {
// the `changes` member is for changes to already-open documents
{
JSONObject changes = json_object_get_object(json, object, "changes");
for (u32 c = 0; c < changes.len; ++c) {
JSONValue uri = json_object_key(json, changes, c);
JSONArray edits = json_force_array(json_object_value(json, changes, c));
LSPDocumentID document = 0;
if (!parse_document_uri(lsp, json, uri, &document))
return false;
LSPWorkspaceChange *change = arr_addp(edit->changes);
change->type = LSP_CHANGE_EDITS;
change->data.edit.document = document;
for (u32 e = 0; e < edits.len; ++e) {
JSONValue text_edit = json_array_get(json, edits, e);
if (!parse_text_edit(lsp, response, json, text_edit, arr_addp(change->data.edit.edits)))
return false;
}
}
}
// the `documentChanges` member is for changes to other documents
JSONArray changes = json_object_get_array(json, object, "documentChanges");
for (u32 c = 0; c < changes.len; ++c) {
JSONObject change = json_array_get_object(json, changes, c);
JSONValue kind = json_object_get(json, change, "kind");
if (kind.type == JSON_UNDEFINED) {
// change is a TextDocumentEdit
JSONObject text_document = json_object_get_object(json, change, "textDocument");
LSPDocumentID document=0;
if (!parse_document_uri(lsp, json, json_object_get(json, text_document, "uri"), &document))
return false;
JSONArray edits = json_object_get_array(json, change, "edits");
LSPWorkspaceChange *out = arr_addp(edit->changes);
out->type = LSP_CHANGE_EDITS;
out->data.edit.document = document;
for (u32 i = 0; i < edits.len; ++i) {
JSONValue text_edit = json_array_get(json, edits, i);
if (!parse_text_edit(lsp, response, json, text_edit, arr_addp(out->data.edit.edits)))
return false;
}
} else if (kind.type == JSON_STRING) {
char kind_str[32]={0};
json_string_get(json, kind.val.string, kind_str, sizeof kind_str);
LSPWorkspaceChange *out = arr_addp(edit->changes);
if (streq(kind_str, "create")) {
out->type = LSP_CHANGE_CREATE;
LSPWorkspaceChangeCreate *create = &out->data.create;
if (!parse_document_uri(lsp, json, json_object_get(json, change, "uri"), &create->document))
return false;
JSONObject options = json_object_get_object(json, change, "options");
create->ignore_if_exists = json_object_get_bool(json, options, "ignoreIfExists", false);
create->overwrite = json_object_get_bool(json, options, "overwrite", false);
} else if (streq(kind_str, "rename")) {
out->type = LSP_CHANGE_RENAME;
LSPWorkspaceChangeRename *rename = &out->data.rename;
if (!parse_document_uri(lsp, json, json_object_get(json, change, "oldUri"), &rename->old))
return false;
if (!parse_document_uri(lsp, json, json_object_get(json, change, "newUri"), &rename->new))
return false;
JSONObject options = json_object_get_object(json, change, "options");
rename->ignore_if_exists = json_object_get_bool(json, options, "ignoreIfExists", false);
rename->overwrite = json_object_get_bool(json, options, "overwrite", false);
} else if (streq(kind_str, "delete")) {
out->type = LSP_CHANGE_DELETE;
LSPWorkspaceChangeDelete *delete = &out->data.delete;
if (!parse_document_uri(lsp, json, json_object_get(json, change, "uri"), &delete->document))
return false;
JSONObject options = json_object_get_object(json, change, "options");
delete->ignore_if_not_exists = json_object_get_bool(json, options, "ignoreIfNotExists", false);
delete->recursive = json_object_get_bool(json, options, "recursive", false);
} else {
lsp_set_error(lsp, "Bad kind of workspace operation: '%s'", kind_str);
}
} else {
lsp_set_error(lsp, "Bad type for (TextDocumentEdit | CreateFile | RenameFile | DeleteFile).kind: %s",
json_type_to_str(kind.type));
}
}
return true;
}
static bool parse_rename_response(LSP *lsp, const JSON *json, LSPResponse *response) {
JSONObject result = json_force_object(json_get(json, "result"));
return parse_workspace_edit(lsp, response, json, result, &response->data.rename);
}
static bool parse_highlight_response(LSP *lsp, const JSON *json, LSPResponse *response) {
LSPResponseHighlight *hl = &response->data.highlight;
JSONArray result = json_force_array(json_get(json, "result"));
for (u32 h = 0; h < result.len; ++h) {
JSONObject highlight_in = json_array_get_object(json, result, h);
JSONValue range_value = json_object_get(json, highlight_in, "range");
LSPRange range = {0};
if (!parse_range(lsp, json, range_value, &range))
return false;
double lsp_kind = json_object_get_number(json, highlight_in, "kind");
LSPHighlightKind kind = LSP_HIGHLIGHT_TEXT;
if (isfinite(lsp_kind) && lsp_kind >= LSP_HIGHLIGHT_MAX && lsp_kind <= LSP_HIGHLIGHT_MAX) {
kind = (LSPHighlightKind)lsp_kind;
}
bool already_highlighted = false;
arr_foreach_ptr(hl->highlights, LSPHighlight, h2) {
if (lsp_ranges_overlap(range, h2->range)) {
if (kind > h2->kind) {
// replace the old range with this one since it has higher kind (e.g. prefer writes over reads)
// technically this is slightly wrong since the new range might overlap with new stuff but whatever idc
h2->range = range;
h2->kind = kind;
}
already_highlighted = true;
}
}
if (already_highlighted) {
// don't show overlapping highlights
continue;
}
LSPHighlight *highlight_out = arr_addp(hl->highlights);
highlight_out->range = range;
highlight_out->kind = kind;
}
return true;
}
static int references_location_cmp(void *context, const void *av, const void *bv) {
// IMPORTANT: don't change this comparison function.
// it matters in ide-usages.c
LSP *lsp = context;
const LSPLocation *a = av, *b = bv;
const char *a_path = lsp_document_path(lsp, a->document);
const char *b_path = lsp_document_path(lsp, b->document);
int cmp = strcmp(a_path, b_path);
if (cmp) return cmp;
u32 a_line = a->range.start.line;
u32 b_line = b->range.start.line;
if (a_line < b_line) return -1;
if (a_line > b_line) return +1;
return 0;
}
static bool parse_references_response(LSP *lsp, const JSON *json, LSPResponse *response) {
LSPResponseReferences *refs = &response->data.references;
JSONArray result = json_force_array(json_get(json, "result"));
for (u32 r = 0; r < result.len; ++r) {