paradoxxxzero_butterfly/coffees/ext/clipboard.coffee
Peter Cai 34b6287e0c
term: complete support for IME & CJK rendering
this fixes #75 and #47, two bugs originated long long ago.

1. Added support for IME events `compositionstart` `compositionupdate` and `compositionend`.
2. Refactored some code to receive input events from a hidden textarea just as how `xterm.js` now does. This removes the need to set `contentEditable` on the body in order to receive IME compistion events, and also guides the IME input box correctly following the cursor.
3. Fixed CJK rendering. Forces "forceWidth" mode with double width on those known CJK ranges in Unicode. Corrected the placeholder logic of the force width mode. Note that some rare halfwidth CJK characters will still not render correctly without `force-unicode-width` enabled. If you see any issue, please enable the `--force-unicode-width` option.
4. Miscallaneous fixes for some problems after introducing the above change

Tested on Firefox Nightly 62 on Linux and Chromium 67 on Linux, with `fcitx` as input method.
2018-06-03 10:27:49 +08:00

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# *-* coding: utf-8 *-*
# This file is part of butterfly
#
# butterfly Copyright(C) 2015-2017 Florian Mounier
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
addEventListener 'copy', copy = (e) ->
document.getElementsByTagName('body')[0].contentEditable = false
butterfly.bell "copied"
e.clipboardData.clearData()
sel = getSelection().toString().replace(
/\u00A0/g, ' ').replace(/\u2007/g, ' ')
data = ''
for line in sel.split('\n')
if line.slice(-1) is '\u23CE'
end = ''
line = line.slice(0, -1)
else
end = '\n'
data += line.replace(/\s*$/, '') + end
e.clipboardData.setData 'text/plain', data.slice(0, -1)
e.preventDefault()
addEventListener 'paste', (e) ->
document.getElementsByTagName('body')[0].contentEditable = false
butterfly.bell "pasted"
data = e.clipboardData.getData 'text/plain'
data = data.replace(/\r\n/g, '\n').replace(/\n/g, '\r')
# Send big data in chunks to prevent data loss
size = 1024
send = ->
butterfly.send data.substring(0, size)
data = data.substring(size)
if data.length
setTimeout send, 25
send()
e.preventDefault()