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prompt.lua
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prompt.lua
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-- The prefix that will be before the search text for the user
local prompt_prefix = ">> "
-- Gets the suffix to delete from some text biased on what happens in a bash
-- prompt. If the text dose not end in a letter then the last word and all of
-- the tailing special characters will be returned. If the text dose end in a
-- letter then only the last word will be returned leaving the special
-- characters that are before the last word. For example
--
-- `some word` -> `some `
-- `some word` -> `some `
-- `some word ` -> `some `
local function get_delete_suffix(text)
if text:match "([A-Za-z]+)$" == nil then
return text:match "([A-Za-z]+[^A-Za-z]+)$"
end
return text:match "([A-Za-z]+)$"
end
local prompt = {}
prompt.suffix = ""
prompt.value = ""
prompt.text = function()
return prompt.value .. prompt.suffix
end
prompt.update = function()
vim.api.nvim_echo({
{ prompt_prefix, "None" },
{ prompt.value:sub(1, -2), "None" },
{ prompt.value:sub(-1, -1), "Underlined" },
{ prompt.suffix, "None" },
}, false, {})
end
prompt.input = function(char)
if char == "BACKSPACE" then
prompt.value = string.sub(prompt.value, 0, -2)
elseif char == "LEFT" then
if #prompt.value > 0 then
prompt.suffix = prompt.value:sub(-1, -1) .. prompt.suffix
prompt.value = prompt.value:sub(1, -2)
end
elseif char == "RIGHT" then
if #prompt.suffix > 0 then
prompt.value = prompt.value .. prompt.suffix:sub(1, 1)
prompt.suffix = prompt.suffix:sub(2, -1)
end
elseif char == "DELETE_WORD" then
local suffix = get_delete_suffix(prompt.value)
if suffix == nil then
prompt.value = ""
else
prompt.value = prompt.value:sub(1, #prompt.value - #suffix)
end
elseif char == "\\\\" then
prompt.value = prompt.value .. "\\"
else
prompt.value = prompt.value .. char
end
prompt.update()
end
prompt.set = function(value)
prompt.value = value
prompt.suffix = ""
prompt.update()
end
prompt.destroy = function()
prompt.value = ""
prompt.suffix = ""
vim.notify ""
end
return prompt

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