137 lines
3.0 KiB
Lua
137 lines
3.0 KiB
Lua
local common = require "core.common"
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local config = require "core.config"
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-- functions for translating a Doc position to another position these functions
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-- can be passed to Doc:move_to|select_to|delete_to()
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local translate = {}
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local function is_non_word(char)
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return config.non_word_chars:find(char, nil, true)
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end
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function translate.previous_char(doc, line, col)
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repeat
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line, col = doc:position_offset(line, col, -1)
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until not common.is_utf8_cont(doc:get_char(line, col))
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return line, col
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end
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function translate.next_char(doc, line, col)
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repeat
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line, col = doc:position_offset(line, col, 1)
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until not common.is_utf8_cont(doc:get_char(line, col))
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return line, col
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end
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function translate.previous_word_start(doc, line, col)
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local prev
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while line > 1 or col > 1 do
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local l, c = doc:position_offset(line, col, -1)
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local char = doc:get_char(l, c)
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if prev and prev ~= char or not is_non_word(char) then
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break
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end
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prev, line, col = char, l, c
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end
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return translate.start_of_word(doc, line, col)
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end
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function translate.next_word_end(doc, line, col)
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local prev
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local end_line, end_col = translate.end_of_doc(doc, line, col)
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while line < end_line or col < end_col do
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local char = doc:get_char(line, col)
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if prev and prev ~= char or not is_non_word(char) then
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break
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end
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line, col = doc:position_offset(line, col, 1)
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prev = char
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end
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return translate.end_of_word(doc, line, col)
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end
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function translate.start_of_word(doc, line, col)
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while true do
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local line2, col2 = doc:position_offset(line, col, -1)
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local char = doc:get_char(line2, col2)
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if is_non_word(char)
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or line == line2 and col == col2 then
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break
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end
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line, col = line2, col2
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end
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return line, col
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end
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function translate.end_of_word(doc, line, col)
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while true do
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local line2, col2 = doc:position_offset(line, col, 1)
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local char = doc:get_char(line, col)
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if is_non_word(char)
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or line == line2 and col == col2 then
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break
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end
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line, col = line2, col2
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end
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return line, col
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end
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function translate.previous_start_of_block(doc, line, col)
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while true do
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line = line - 1
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if line <= 1 then
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return 1, 1
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end
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if doc.lines[line-1]:match("^%s*$")
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and not doc.lines[line]:match("^%s*$") then
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return line, (doc.lines[line]:find("%S"))
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end
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end
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end
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function translate.next_start_of_block(doc, line, col)
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while true do
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line = line + 1
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if line >= #doc.lines then
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return #doc.lines, 1
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end
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if doc.lines[line-1]:match("^%s*$")
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and not doc.lines[line]:match("^%s*$") then
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return line, (doc.lines[line]:find("%S"))
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end
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end
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end
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function translate.start_of_line(doc, line, col)
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return line, 1
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end
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function translate.end_of_line(doc, line, col)
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return line, math.huge
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end
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function translate.start_of_doc(doc, line, col)
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return 1, 1
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end
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function translate.end_of_doc(doc, line, col)
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return #doc.lines, #doc.lines[#doc.lines]
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end
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return translate
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