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-- Copyright 2007-2011 Mitchell mitchell<att>caladbolg.net. See LICENSE.
local L = _G.locale.localize
---
-- Filter-Through for the textadept module.
module('_m.textadept.filter_through', package.seeall)
local cat = not WIN32 and 'cat' or 'type'
local tmpfile = _USERHOME..'/.ft'
local filter_through_active = false
---
-- Prompts for a Linux, Mac OSX, or Windows shell command to filter text
-- through.
-- The standard input (stdin) for shell commands is determined as follows: (1)
-- If text is selected and spans multiple lines, all text on the lines
-- containing the selection is used. However, if the end of the selection is at
-- the beginning of a line, only the EOL (end of line) characters from the
-- previous line are included as input. The rest of the line is excluded. (2) If
-- text is selected and spans a single line, only the selected text is used. (3)
-- If no text is selected, the entire buffer is used.
-- The input text is replaced with the standard output (stdout) of the command.
function filter_through()
filter_through_active = true
gui.command_entry.focus()
end
events.connect('command_entry_keypress',
function(code)
if filter_through_active and code == 0xff1b then -- escape
filter_through_active = false
end
end, 1) -- place before command_entry.lua's handler (if necessary)
events.connect('command_entry_command',
function(text) -- filter through
if filter_through_active then
local buffer = buffer
local s, e = buffer.selection_start, buffer.selection_end
local input
if s ~= e then -- use selected lines as input
local i, j = buffer:line_from_position(s), buffer:line_from_position(e)
if i < j then
s = buffer:position_from_line(i)
if buffer.column[e] > 0 then e = buffer:position_from_line(j + 1) end
end
input = buffer:text_range(s, e)
else -- use whole buffer as input
input = buffer:get_text()
end
local f = io.open(tmpfile, 'wb')
f:write(input)
f:close()
local cmd = table.concat({ cat, '"'..tmpfile..'"', '|', text }, ' ')
if WIN32 then cmd = cmd:gsub('/', '\\') end
local p = io.popen(cmd)
if s ~= e then
buffer.target_start, buffer.target_end = s, e
buffer:replace_target(p:read('*all'))
buffer:set_sel(buffer.target_start, buffer.target_end)
else
buffer:set_text(p:read('*all'))
buffer:goto_pos(s)
end
p:close()
os.remove(tmpfile)
filter_through_active = false
return true
end
end, 1) -- place before command_entry.lua's handler (if necessary)
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