137 lines
4.2 KiB
Lua
137 lines
4.2 KiB
Lua
local core = require "core"
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local command = require "core.command"
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local vim = {}
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local command_buffer = {verb = '.', mult_accu = ''}
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function command_buffer:reset()
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self.verb = '.'
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self.mult_accu = ''
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end
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function command_buffer:mult()
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return self.mult_accu == '' and 1 or tostring(self.mult_accu)
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end
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function command_buffer:add_mult_char(k)
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self.mult_accu = self.mult_accu .. k
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end
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local function table_find(t, e)
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for i = 1, #t do
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if t[i] == e then return i end
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end
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end
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local verbs_obj = {'c', 'd'}
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local verbs_imm = {'a', 'h', 'i', 'j', 'k', 'l', 'o', 'p', 'u', 'x', 'y', 'O', 'left', 'right', 'up', 'down'}
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local vim_objects = {'d', 'e', 'w', '^', '0', '$'}
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local vim_object_map = {
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['e'] = 'next-word-end',
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['w'] = 'next-word-begin',
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['$'] = 'end-of-line',
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['^'] = 'start-of-line',
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['0'] = 'start-of-line',
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}
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local function vim_execute(verb, mult, object)
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if verb == '.' then
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if object == '$' then
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command.perform_many(mult - 1, 'doc:move-to-next-line')
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command.perform('doc:move-to-end-of-line')
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else
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if object == 'e' then
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command.perform('doc:move-to-next-char')
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end
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command.perform_many(mult, 'doc:move-to-' .. vim_object_map[object])
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if object == 'e' then
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command.perform('doc:move-to-previous-char')
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end
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end
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elseif verb == 'd' then
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if object == '$' then
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command.perform_many(mult - 1, 'doc:select-to-next-line')
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command.perform('doc:select-to-end-of-line')
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elseif object == 'd' then
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command.perform('doc:move-to-start-of-line')
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command.perform_many(mult, 'doc:select-to-next-line')
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else
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command.perform_many(mult, 'doc:select-to-' .. vim_object_map[object])
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end
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command.perform('doc:copy')
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command.perform('doc:cut')
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elseif verb == 'c' then
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command.perform_many(mult, 'doc:select-to-' .. vim_object_map[object])
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command.perform('doc:copy')
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command.perform('doc:cut')
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command.perform('core:set-insert-mode')
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elseif verb == 'h' or verb == 'left' then
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command.perform_many(mult, 'doc:move-to-previous-char')
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elseif verb == 'j' or verb == 'down' then
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command.perform_many(mult, 'doc:move-to-next-line')
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elseif verb == 'k' or verb == 'up' then
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command.perform_many(mult, 'doc:move-to-previous-line')
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elseif verb == 'l' or verb == 'right' then
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command.perform_many(mult, 'doc:move-to-next-char')
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elseif verb == 'x' then
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command.perform_many(mult, 'doc:delete')
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elseif verb == 'a' then
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command.perform('core:set-insert-mode')
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command.perform('doc:move-to-next-char')
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elseif verb == 'i' then
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command.perform('core:set-insert-mode')
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elseif verb == 'o' then
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command.perform('doc:move-to-end-of-line')
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command.perform('doc:newline')
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command.perform('core:set-insert-mode')
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elseif verb == 'O' then -- FIXME: doesn't work
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command.perform('doc:move-to-start-of-line')
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command.perform('doc:newline')
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command.perform('doc:move-to-previous-line')
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command.perform('core:set-insert-mode')
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elseif verb == 'p' then
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command.perform('doc:paste')
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elseif verb == 'u' then
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command.perform('doc:undo')
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else
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return false
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end
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return true
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end
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function vim.on_key_pressed(mode, stroke, k)
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if mode == 'command' then
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if command_buffer.verb == '.' and table_find(verbs_imm, stroke) then
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vim_execute(stroke, command_buffer:mult())
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command_buffer:reset()
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return true
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elseif command_buffer.verb == '.' and table_find(verbs_obj, stroke) then
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command_buffer.verb = stroke
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return true
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elseif string.byte(k) >= string.byte('0') and string.byte(k) <= string.byte('9') then
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command_buffer:add_mult_char(k)
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return true
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elseif table_find(vim_objects, stroke) then
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vim_execute(command_buffer.verb, command_buffer:mult(), stroke)
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command_buffer:reset()
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return true
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elseif stroke == 'escape' then
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command_buffer:reset()
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return true
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end
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elseif mode == 'insert' then
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if stroke == 'escape' or stroke == 'ctrl+c' then
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core.set_editing_mode(core.active_view, 'command')
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return true
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end
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if stroke == 'backspace' then
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command.perform('doc:backspace')
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end
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end
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return false
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end
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return vim
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