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A new tui API for simple line editing

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Handles basic line-editing with the extended keyboard protocol and
support for wide chars.
Currently used by the unicode input kitten.
This commit is contained in:
Kovid Goyal
2018-06-14 13:11:48 +05:30
parent a7d9c63a4e
commit 7214b66aa5
3 changed files with 205 additions and 30 deletions
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66
kittens/unicode_input/main.py
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@@ -14,9 +14,10 @@ from kitty.utils import get_editor
from kitty.fast_data_types import wcswidth
from kitty.key_encoding import (
DOWN, ESCAPE, F1, F2, F3, F4, F12, LEFT, RELEASE, RIGHT, SHIFT, TAB, UP,
backspace_key, enter_key
enter_key
)
from ..tui.line_edit import LineEdit
from ..tui.handler import Handler
from ..tui.loop import Loop
from ..tui.operations import (
@@ -247,8 +248,8 @@ class UnicodeInput(Handler):
def __init__(self, cached_values):
self.cached_values = cached_values
self.line_edit = LineEdit()
self.recent = list(self.cached_values.get('recent', DEFAULT_SET))
self.current_input = ''
self.current_char = None
self.prompt_template = '{}> '
self.last_updated_code_point_at = None
@@ -269,9 +270,9 @@ class UnicodeInput(Handler):
codepoints = load_favorites()
q = self.mode, tuple(codepoints)
elif self.mode is NAME:
q = self.mode, self.current_input
q = self.mode, self.line_edit.current_input
if q != self.last_updated_code_point_at:
words = self.current_input.split()
words = self.line_edit.current_input.split()
words = [w for w in words if w != INDEX_CHAR]
index_words = [i for i, w in enumerate(words) if i > 0 and is_index(w)]
if index_words:
@@ -291,10 +292,10 @@ class UnicodeInput(Handler):
self.current_char = None
if self.mode is HEX:
try:
if self.current_input.startswith(INDEX_CHAR) and len(self.current_input) > 1:
self.current_char = chr(self.table.codepoint_at_hint(self.current_input[1:]))
if self.line_edit.current_input.startswith(INDEX_CHAR) and len(self.line_edit.current_input) > 1:
self.current_char = chr(self.table.codepoint_at_hint(self.line_edit.current_input[1:]))
else:
code = int(self.current_input, 16)
code = int(self.line_edit.current_input, 16)
self.current_char = chr(code)
except Exception:
pass
@@ -304,8 +305,8 @@ class UnicodeInput(Handler):
self.current_char = chr(cc)
else:
try:
if self.current_input:
self.current_char = chr(self.table.codepoint_at_hint(self.current_input.lstrip(INDEX_CHAR)))
if self.line_edit.current_input:
self.current_char = chr(self.table.codepoint_at_hint(self.line_edit.current_input.lstrip(INDEX_CHAR)))
except Exception:
pass
if self.current_char is not None:
@@ -366,8 +367,7 @@ class UnicodeInput(Handler):
writeln(_('Enter the hex code for the character'))
else:
writeln(_('Enter the index for the character you want from the list below'))
self.write(self.prompt)
self.write(self.current_input)
self.line_edit.write(self.write, self.prompt)
with cursor(self.write):
writeln()
writeln(self.choice_line)
@@ -385,14 +385,34 @@ class UnicodeInput(Handler):
self.draw_screen()
def on_text(self, text, in_bracketed_paste):
self.current_input += text
self.line_edit.on_text(text, in_bracketed_paste)
self.refresh()
def on_key(self, key_event):
if key_event is backspace_key:
self.current_input = self.current_input[:-1]
if self.mode is NAME and key_event.type is not RELEASE and not key_event.mods:
if key_event.key is TAB:
if key_event.mods == SHIFT:
self.table.move_current(cols=-1), self.refresh()
elif not key_event.mods:
self.table.move_current(cols=1), self.refresh()
return
elif key_event.key is LEFT and not key_event.mods:
self.table.move_current(cols=-1), self.refresh()
return
elif key_event.key is RIGHT and not key_event.mods:
self.table.move_current(cols=1), self.refresh()
return
elif key_event.key is UP and not key_event.mods:
self.table.move_current(rows=-1), self.refresh()
return
elif key_event.key is DOWN and not key_event.mods:
self.table.move_current(rows=1), self.refresh()
return
if self.line_edit.on_key(key_event):
self.refresh()
elif key_event is enter_key:
return
if key_event is enter_key:
self.quit_loop(0)
elif key_event.type is RELEASE and not key_event.mods:
if key_event.key is ESCAPE:
@@ -407,20 +427,6 @@ class UnicodeInput(Handler):
self.switch_mode(FAVORITES)
elif key_event.key is F12 and self.mode is FAVORITES:
self.edit_favorites()
elif self.mode is NAME:
if key_event.key is TAB:
if key_event.mods == SHIFT:
self.table.move_current(cols=-1), self.refresh()
elif not key_event.mods:
self.table.move_current(cols=1), self.refresh()
elif key_event.key is LEFT and not key_event.mods:
self.table.move_current(cols=-1), self.refresh()
elif key_event.key is RIGHT and not key_event.mods:
self.table.move_current(cols=1), self.refresh()
elif key_event.key is UP and not key_event.mods:
self.table.move_current(rows=-1), self.refresh()
elif key_event.key is DOWN and not key_event.mods:
self.table.move_current(rows=1), self.refresh()
def edit_favorites(self):
if not os.path.exists(favorites_path):
@@ -437,7 +443,7 @@ class UnicodeInput(Handler):
if mode is not self.mode:
self.mode = mode
self.cached_values['mode'] = mode
self.current_input = ''
self.line_edit.clear()
self.current_char = None
self.choice_line = ''
self.refresh()