diff options
Diffstat (limited to 'ide-signature-help.c')
| -rw-r--r-- | ide-signature-help.c | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/ide-signature-help.c b/ide-signature-help.c new file mode 100644 index 0000000..97dc8c3 --- /dev/null +++ b/ide-signature-help.c @@ -0,0 +1,153 @@ +// deals with textDocument/signatureHelp LSP requests + +static void signature_help_clear(SignatureHelp *help) { + for (int i = 0; i < help->signature_count; ++i) { + Signature sig = help->signatures[i]; + free(sig.label_pre); + free(sig.label_active); + free(sig.label_post); + } + memset(help->signatures, 0, sizeof help->signatures); + help->signature_count = 0; +} + +void signature_help_send_request(Ted *ted) { + SignatureHelp *help = &ted->signature_help; + Settings *settings = ted_active_settings(ted); + if (!settings->signature_help_enabled) { + signature_help_clear(help); + return; + } + TextBuffer *buffer = ted->active_buffer; + if (!buffer) { + signature_help_clear(help); + return; + } + LSP *lsp = buffer_lsp(buffer); + if (!lsp) { + signature_help_clear(help); + return; + } + LSPRequest request = {.type = LSP_REQUEST_SIGNATURE_HELP}; + LSPRequestSignatureHelp *s = &request.data.signature_help; + s->position = buffer_cursor_pos_as_lsp_document_position(buffer); + lsp_send_request(lsp, &request); + help->retrigger = false; +} + +void signature_help_retrigger(Ted *ted) { + // don't just send the request here -- we don't want to send more than + // one request per frame. + ted->signature_help.retrigger = true; +} + +void signature_help_open(Ted *ted, char32_t trigger) { + (void)trigger; // for now we don't send context + signature_help_send_request(ted); +} + +bool signature_help_is_open(Ted *ted) { + return ted->signature_help.signature_count > 0; +} + + +void signature_help_close(Ted *ted) { + signature_help_clear(&ted->signature_help); +} + +void signature_help_process_lsp_response(Ted *ted, const LSPResponse *response) { + Settings *settings = ted_active_settings(ted); + if (!settings->signature_help_enabled) return; + + if (response->request.type != LSP_REQUEST_SIGNATURE_HELP) + return; + SignatureHelp *help = &ted->signature_help; + const LSPResponseSignatureHelp *lsp_help = &response->data.signature_help; + u32 signature_count = arr_len(lsp_help->signatures); + if (signature_count > SIGNATURE_HELP_MAX) + signature_count = SIGNATURE_HELP_MAX; + + signature_help_clear(help); + for (u32 s = 0; s < signature_count; ++s) { + Signature *signature = &help->signatures[s]; + LSPSignatureInformation *lsp_signature = &lsp_help->signatures[s]; + + const char *label = lsp_response_string(response, lsp_signature->label); + size_t start = unicode_utf16_to_utf8_offset(label, lsp_signature->active_start); + size_t end = unicode_utf16_to_utf8_offset(label, lsp_signature->active_end); + if (start == (size_t)-1) { + assert(0); + start = 0; + } + if (end == (size_t)-1) { + assert(0); + end = 0; + } + u32 active_start = (u32)start; + u32 active_end = (u32)end; + signature->label_pre = strn_dup(label, active_start); + signature->label_active = strn_dup(label + active_start, active_end - active_start); + signature->label_post = str_dup(label + active_end); + } + + help->signature_count = (u16)signature_count; +} + +void signature_help_frame(Ted *ted) { + Settings *settings = ted_active_settings(ted); + if (!settings->signature_help_enabled) + return; + + SignatureHelp *help = &ted->signature_help; + if (help->retrigger) + signature_help_send_request(ted); + u16 signature_count = help->signature_count; + if (!signature_count) + return; + Font *font = ted->font; + Font *font_bold = ted->font_bold; + TextBuffer *buffer = ted->active_buffer; + if (!buffer) + return; + + u32 *colors = settings->colors; + float border = settings->border_thickness; + + float width = buffer->x2 - buffer->x1; + float height = FLT_MAX; + // make sure signature help doesn't take up too much space + while (1) { + height = font->char_height * signature_count; + if (height < (buffer->y2 - buffer->y1) * 0.25f) + break; + --signature_count; + if (signature_count == 0) return; + } + float x = buffer->x1, y = buffer->y2 - height; + gl_geometry_rect(rect_xywh(x, y - border, width, border), + colors[COLOR_AUTOCOMPLETE_BORDER]); + gl_geometry_rect(rect_xywh(x, y, width, height), + colors[COLOR_AUTOCOMPLETE_BG]); + + // draw the signatures + for (int s = 0; s < signature_count; ++s) { + const Signature *signature = &help->signatures[s]; + TextRenderState state = text_render_state_default; + state.x = x; + state.y = y; + state.min_x = x; + state.min_y = y; + state.max_x = buffer->x2; + state.max_y = buffer->y2; + rgba_u32_to_floats(colors[COLOR_TEXT], state.color); + + text_utf8_with_state(font, &state, signature->label_pre); + text_utf8_with_state(font_bold, &state, signature->label_active); + text_utf8_with_state(font, &state, signature->label_post); + y += font->char_height; + } + + gl_geometry_draw(); + text_render(font); + text_render(font_bold); +} |