diff options
Diffstat (limited to 'buffer.c')
| -rw-r--r-- | buffer.c | 54 |
1 files changed, 49 insertions, 5 deletions
@@ -1850,11 +1850,55 @@ LSPRange buffer_selection_as_lsp_range(TextBuffer *buffer) { } } -void buffer_apply_lsp_text_edit(TextBuffer *buffer, const LSPResponse *response, const LSPTextEdit *edit) { - BufferPos start = buffer_pos_from_lsp(buffer, edit->range.start); - BufferPos end = buffer_pos_from_lsp(buffer, edit->range.end); - buffer_delete_chars_between(buffer, start, end); - buffer_insert_utf8_at_pos(buffer, start, lsp_response_string(response, edit->new_text)); +void buffer_apply_lsp_text_edits(TextBuffer *buffer, const LSPResponse *response, const LSPTextEdit *lsp_edits, size_t n_edits) { + typedef struct { + BufferPos pos; + BufferPos end; + const char *new_text; + } Edit; + Edit *edits = calloc(n_edits, sizeof *edits); + for (size_t i = 0; i < n_edits; ++i) { + Edit *edit = &edits[i]; + edit->pos = buffer_pos_from_lsp(buffer, lsp_edits[i].range.start); + edit->end = buffer_pos_from_lsp(buffer, lsp_edits[i].range.end); + edit->new_text = lsp_response_string(response, lsp_edits[i].new_text); + } + for (size_t i = 0; i < n_edits; ++i) { + Edit *edit = &edits[i]; + buffer_delete_chars_between(buffer, edit->pos, edit->end); + buffer_insert_utf8_at_pos(buffer, edit->pos, edit->new_text); + // a TextEdit[] is annoyingly *not* applied one edit at a time, + // instead all the edits happen "at once" + // (see https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textEditArray) + // so we need to adjust the positions of subsequent edits + size_t inserted_newlines = str_count_char(edit->new_text, '\n'); + i32 line_diff = (i32)inserted_newlines + - (i32)(edit->end.line - edit->pos.line); + i32 index_diff = 0; + const char *last_newline = strrchr(edit->new_text, '\n'); + if (last_newline) { + index_diff = (i32)unicode_utf32_len(last_newline + 1) - (i32)edit->end.index; + } else { + index_diff = (i32)unicode_utf32_len(edit->new_text) + (i32)edit->pos.index - (i32)edit->end.index; + } + // see how nightmarish this is? thanks a lot, microsoft. + for (size_t j = i + 1; j < n_edits; ++j) { + Edit *edit2 = &edits[j]; + BufferPos bounds[2] = {edit2->pos, edit2->end}; + for (u32 k = 0; k < 2; ++k) { + BufferPos *pos = &bounds[k]; + if (buffer_pos_cmp(*pos, edit->pos) < 0) + continue; + + if (pos->line <= edit->end.line) + pos->index += (u32)index_diff; + pos->line += (u32)line_diff; + } + edit2->pos = bounds[0]; + edit2->end = bounds[1]; + } + } + free(edits); } static void buffer_send_lsp_did_change(LSP *lsp, TextBuffer *buffer, BufferPos pos, |