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Move the python editing key handling into the python smarts module so that it is available for all text edit instances

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This commit is contained in:
Kovid Goyal 2014-11-21 14:39:13 +05:30
parent d68ecaf264
commit 719a83584f
3 changed files with 98 additions and 80 deletions
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92
src/calibre/gui2/tweak_book/editor/smart/python.py Normal file
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@ -0,0 +1,92 @@
#!/usr/bin/env python
# vim:fileencoding=utf-8
from __future__ import (unicode_literals, division, absolute_import,
print_function)
__license__ = 'GPL v3'
__copyright__ = '2014, Kovid Goyal <kovid at kovidgoyal.net>'
import re
from PyQt5.Qt import Qt
from calibre.gui2.tweak_book.editor.smart import NullSmarts
def get_text_before_cursor(editor):
cursor = editor.textCursor()
cursor.clearSelection()
cursor.movePosition(cursor.StartOfLine, cursor.KeepAnchor)
text = cursor.selectedText()
return cursor, text
def expand_tabs(text):
return text.replace('\t', ' '*4)
def get_leading_whitespace_on_line(editor, previous=False):
cursor = editor.textCursor()
block = cursor.block()
if previous:
block = block.previous()
if block.isValid():
text = block.text()
ntext = text.lstrip()
return expand_tabs(text[:len(text)-len(ntext)])
return ''
class Smarts(NullSmarts):
def handle_key_press(self, ev, editor):
key = ev.key()
if key == Qt.Key_Tab:
cursor, text = get_text_before_cursor(editor)
if not text.lstrip():
# cursor is preceded by whitespace
text = expand_tabs(text)
spclen = len(text) - (len(text) % 4) + 4
cursor.insertText(' ' * spclen)
editor.setTextCursor(cursor)
else:
cursor = editor.textCursor()
cursor.insertText(' ' * 4)
editor.setTextCursor(cursor)
return True
elif key == Qt.Key_Backspace:
cursor, text = get_text_before_cursor(editor)
if text and not text.lstrip():
# cursor is preceded by whitespace
text = expand_tabs(text)
spclen = max(0, len(text) - (len(text) % 4) - 4)
cursor.insertText(' ' * spclen)
editor.setTextCursor(cursor)
return True
elif key in (Qt.Key_Enter, Qt.Key_Return):
ls = get_leading_whitespace_on_line(editor)
cursor = editor.textCursor()
line = cursor.block().text()
if line.rstrip().endswith(':'):
ls += ' ' * 4
elif re.match(r'\s+(continue|break|return|pass)(\s|$)', line) is not None:
ls = ls[:-4]
cursor.insertText('\n' + ls)
editor.setTextCursor(cursor)
return True
elif key == Qt.Key_Colon:
cursor, text = get_text_before_cursor(editor)
if re.match(r'\s+(else|elif|except)(\(|\s|$)', text) is not None:
ls = get_leading_whitespace_on_line(editor)
pls = get_leading_whitespace_on_line(editor, previous=True)
if ls and ls >= pls:
ls = ls[:-4]
text = ls + text.lstrip() + ':'
cursor.insertText(text)
editor.setTextCursor(cursor)
return True
if __name__ == '__main__':
import os
from calibre.gui2.tweak_book.editor.widget import launch_editor
launch_editor(os.path.abspath(__file__), syntax='python')

7
src/calibre/gui2/tweak_book/editor/text.py
View File

@ -139,6 +139,7 @@ class TextEdit(PlainTextEdit):
self.gutter_width = 0
self.expected_geometry = expected_geometry
self.saved_matches = {}
self.syntax = None
self.smarts = NullSmarts(self)
self.current_cursor_line = None
self.current_search_mark = None
@ -151,7 +152,6 @@ class TextEdit(PlainTextEdit):
self.cursorPositionChanged.connect(self.highlight_cursor_line)
self.blockCountChanged[int].connect(self.update_line_number_area_width)
self.updateRequest.connect(self.update_line_number_area)
self.syntax = None
@dynamic_property
def is_modified(self):
@ -173,7 +173,8 @@ class TextEdit(PlainTextEdit):
self.apply_theme(theme)
w = self.fontMetrics()
self.space_width = w.width(' ')
self.setTabStopWidth(prefs['editor_tab_stop_width'] * self.space_width)
tw = 4 if self.syntax == 'python' else prefs['editor_tab_stop_width']
self.setTabStopWidth(tw * self.space_width)
if dictionaries_changed:
self.highlighter.rehighlight()
@ -223,6 +224,8 @@ class TextEdit(PlainTextEdit):
if process_template and QPlainTextEdit.find(self, '%CURSOR%'):
c = self.textCursor()
c.insertText('')
if syntax == 'python':
self.setTabStopWidth(4 * self.space_width)
def change_document_name(self, newname):
self.highlighter.doc_name = newname

79
src/calibre/gui2/tweak_book/function_replace.py
View File

@ -198,83 +198,6 @@ class FunctionBox(EditWithComplete):
menu.addAction(_('Show saved searches'), self.show_saved_searches.emit)
menu.exec_(event.globalPos())
class PythonEdit(TextEdit):
def apply_settings(self, *args, **kwargs):
TextEdit.apply_settings(self, *args, **kwargs)
self.setTabStopWidth(4 * self.space_width)
def keyPressEvent(self, ev):
key = ev.key()
def expand_tabs(text):
return text.replace('\t', ' '*4)
def get_text_before_cursor():
cursor = self.textCursor()
cursor.clearSelection()
cursor.movePosition(cursor.StartOfLine, cursor.KeepAnchor)
text = cursor.selectedText()
return cursor, text
def get_leading_whitespace_on_line(previous=False):
cursor = self.textCursor()
block = cursor.block()
if previous:
block = block.previous()
if block.isValid():
text = block.text()
ntext = text.lstrip()
return expand_tabs(text[:len(text)-len(ntext)])
return ''
if key == Qt.Key_Tab:
cursor, text = get_text_before_cursor()
if not text.lstrip():
# cursor is preceded by whitespace
text = expand_tabs(text)
spclen = len(text) - (len(text) % 4) + 4
cursor.insertText(' ' * spclen)
self.setTextCursor(cursor)
return
else:
cursor = self.textCursor()
cursor.insertText(' ' * 4)
self.setTextCursor(cursor)
elif key == Qt.Key_Backspace:
cursor, text = get_text_before_cursor()
if text and not text.lstrip():
# cursor is preceded by whitespace
text = expand_tabs(text)
spclen = max(0, len(text) - (len(text) % 4) - 4)
cursor.insertText(' ' * spclen)
self.setTextCursor(cursor)
return
elif key in (Qt.Key_Enter, Qt.Key_Return):
ls = get_leading_whitespace_on_line()
cursor = self.textCursor()
line = cursor.block().text()
if line.rstrip().endswith(':'):
ls += ' ' * 4
elif re.match(r'\s+(continue|break|return|pass)(\s|$)', line) is not None:
ls = ls[:-4]
cursor.insertText('\n' + ls)
self.setTextCursor(cursor)
return
elif key == Qt.Key_Colon:
cursor, text = get_text_before_cursor()
if re.match(r'\s+(else|elif|except)(\(|\s|$)', text) is not None:
ls = get_leading_whitespace_on_line()
pls = get_leading_whitespace_on_line(previous=True)
if ls and ls >= pls:
ls = ls[:-4]
text = ls + text.lstrip() + ':'
cursor.insertText(text)
self.setTextCursor(cursor)
return
TextEdit.keyPressEvent(self, ev)
class FunctionEditor(Dialog):
def __init__(self, func_name='', parent=None):
@ -293,7 +216,7 @@ class FunctionEditor(Dialog):
h.addWidget(fb, stretch=10)
self.la3 = la = QLabel(_('&Code:'))
self.source_code = PythonEdit(self)
self.source_code = TextEdit(self)
self.source_code.load_text('', 'python')
la.setBuddy(self.source_code)
l.addWidget(la), l.addWidget(self.source_code)