diff options
Diffstat (limited to 'runtime/lua/vim')
| -rw-r--r-- | runtime/lua/vim/lsp/sync.lua | 74 |
1 files changed, 38 insertions, 36 deletions
diff --git a/runtime/lua/vim/lsp/sync.lua b/runtime/lua/vim/lsp/sync.lua index 585c14a00f..f185e3973f 100644 --- a/runtime/lua/vim/lsp/sync.lua +++ b/runtime/lua/vim/lsp/sync.lua @@ -74,43 +74,45 @@ local function byte_to_utf(line, byte, offset_encoding) return utf_idx + 1 end +local function compute_line_length(line, offset_encoding) + local length + local _ + if offset_encoding == 'utf-16' then + _, length = str_utfindex(line) + elseif offset_encoding == 'utf-32' then + length, _ = str_utfindex(line) + else + length = #line + end + return length +end + ---@private -- Given a line, byte idx, alignment, and offset_encoding convert to the aligned -- utf-8 index and either the utf-16, or utf-32 index. ---@param line string the line to index into ---@param byte integer the byte idx ----@param align string when dealing with multibyte characters, --- to choose the start of the current character or the beginning of the next. --- Used for incremental sync for start/end range respectively ---@param offset_encoding string utf-8|utf-16|utf-32|nil (default: utf-8) ---@returns table<string, int> byte_idx and char_idx of first change position -local function align_position(line, byte, align, offset_encoding) +local function align_end_position(line, byte, offset_encoding) local char -- If on the first byte, or an empty string: the trivial case if byte == 1 or #line == 0 then char = byte -- Called in the case of extending an empty line "" -> "a" elseif byte == #line + 1 then - byte = byte + str_utf_end(line, #line) - char = byte_to_utf(line, byte, offset_encoding) + char = compute_line_length(line, offset_encoding) + 1 else -- Modifying line, find the nearest utf codepoint - if align == 'start' then - byte = byte + str_utf_start(line, byte) - char = byte_to_utf(line, byte, offset_encoding) - elseif align == 'end' then - local offset = str_utf_end(line, byte) - -- If the byte does not fall on the start of the character, then - -- align to the start of the next character. - if offset > 0 then - char = byte_to_utf(line, byte, offset_encoding) + 1 - byte = byte + offset - else - char = byte_to_utf(line, byte, offset_encoding) - byte = byte + offset - end + local offset = str_utf_end(line, byte) + -- If the byte does not fall on the start of the character, then + -- align to the start of the next character. + if offset > 0 then + char = byte_to_utf(line, byte, offset_encoding) + 1 + byte = byte + offset else - error('`align` must be start or end.') + char = byte_to_utf(line, byte, offset_encoding) + byte = byte + offset end -- Extending line, find the nearest utf codepoint for the last valid character end @@ -154,7 +156,18 @@ local function compute_start_range(prev_lines, curr_lines, firstline, lastline, end -- Convert byte to codepoint if applicable - local byte_idx, char_idx = align_position(prev_line, start_byte_idx, 'start', offset_encoding) + local char_idx + local byte_idx + if start_byte_idx == 1 or (#prev_line == 0 and start_byte_idx == 1)then + byte_idx = start_byte_idx + char_idx = 1 + elseif start_byte_idx == #prev_line + 1 then + byte_idx = start_byte_idx + char_idx = compute_line_length(prev_line, offset_encoding) + 1 + else + byte_idx = start_byte_idx + str_utf_start(prev_line, start_byte_idx) + char_idx = byte_to_utf(prev_line, start_byte_idx, offset_encoding) + end -- Return the start difference (shared for new and prev lines) return { line_idx = firstline, byte_idx = byte_idx, char_idx = char_idx } @@ -219,11 +232,12 @@ local function compute_end_range(prev_lines, curr_lines, start_range, firstline, -- Iterate from end to beginning of shortest line local prev_end_byte_idx = prev_line_length - byte_offset + 1 + -- Handle case where lines match if prev_end_byte_idx == 0 then prev_end_byte_idx = 1 end - local prev_byte_idx, prev_char_idx = align_position(prev_line, prev_end_byte_idx, 'start', offset_encoding) + local prev_byte_idx, prev_char_idx = align_end_position(prev_line, prev_end_byte_idx, offset_encoding) local prev_end_range = { line_idx = prev_line_idx, byte_idx = prev_byte_idx, char_idx = prev_char_idx } local curr_end_range @@ -236,7 +250,7 @@ local function compute_end_range(prev_lines, curr_lines, start_range, firstline, if curr_end_byte_idx == 0 then curr_end_byte_idx = 1 end - local curr_byte_idx, curr_char_idx = align_position(curr_line, curr_end_byte_idx, 'start', offset_encoding) + local curr_byte_idx, curr_char_idx = align_end_position(curr_line, curr_end_byte_idx, offset_encoding) curr_end_range = { line_idx = curr_line_idx, byte_idx = curr_byte_idx, char_idx = curr_char_idx } end @@ -280,18 +294,6 @@ local function extract_text(lines, start_range, end_range, line_ending) end end -local function compute_line_length(line, offset_encoding) - local length - local _ - if offset_encoding == 'utf-16' then - _, length = str_utfindex(line) - elseif offset_encoding == 'utf-32' then - length, _ = str_utfindex(line) - else - length = #line - end - return length -end ---@private -- rangelength depends on the offset encoding -- bytes for utf-8 (clangd with extenion) |