我正在尝试在QScintilla中实现一个可切换评论功能，该功能适用于多个选择。不幸的是，我不太知道如何做到这一点，到目前为止，我已经想出了以下代码：
import sys
import re
import math
from PyQt5.Qt import * # noqa
from PyQt5.Qsci import QsciScintilla
from PyQt5 import Qsci
from PyQt5.Qsci import QsciLexerCPP
class Commenter():
def __init__(self, sci, comment_str):
self.sci = sci
self.comment_str = comment_str
def is_commented_line(self, line):
return line.strip().startswith(self.comment_str)
def toggle_comment_block(self):
sci = self.sci
line, index = sci.getCursorPosition()
if sci.hasSelectedText() and self.is_commented_line(sci.text(sci.getSelection()[0])):
self.uncomment_line_or_selection()
elif not self.is_commented_line(sci.text(line)):
self.comment_line_or_selection()
else:
start_line = line
while start_line > 0 and self.is_commented_line(sci.text(start_line - 1)):
start_line -= 1
end_line = line
lines = sci.lines()
while end_line < lines and self.is_commented_line(sci.text(end_line + 1)):
end_line += 1
sci.setSelection(start_line, 0, end_line, sci.lineLength(end_line))
self.uncomment_line_or_selection()
sci.setCursorPosition(line, index - len(self.comment_str))
def comment_line_or_selection(self):
sci = self.sci
if sci.hasSelectedText():
self.comment_selection()
else:
self.comment_line()
def uncomment_line_or_selection(self):
sci = self.sci
if sci.hasSelectedText():
self.uncomment_selection()
else:
self.uncomment_line()
def comment_line(self):
sci = self.sci
line, index = sci.getCursorPosition()
sci.beginUndoAction()
sci.insertAt(self.comment_str, line, sci.indentation(line))
sci.endUndoAction()
def uncomment_line(self):
sci = self.sci
line, index = sci.getCursorPosition()
if not self.is_commented_line(sci.text(line)):
return
sci.beginUndoAction()
sci.setSelection(
line, sci.indentation(line),
line, sci.indentation(line) + len(self.comment_str)
)
sci.removeSelectedText()
sci.endUndoAction()
def comment_selection(self):
sci = self.sci
if not sci.hasSelectedText():
return
line_from, index_from, line_to, index_to = sci.getSelection()
if index_to == 0:
end_line = line_to - 1
else:
end_line = line_to
sci.beginUndoAction()
for line in range(line_from, end_line + 1):
sci.insertAt(self.comment_str, line, sci.indentation(line))
sci.setSelection(line_from, 0, end_line + 1, 0)
sci.endUndoAction()
def uncomment_selection(self):
sci = self.sci
if not sci.hasSelectedText():
return
line_from, index_from, line_to, index_to = sci.getSelection()
if index_to == 0:
end_line = line_to - 1
else:
end_line = line_to
sci.beginUndoAction()
for line in range(line_from, end_line + 1):
if not self.is_commented_line(sci.text(line)):
continue
sci.setSelection(
line, sci.indentation(line),
line,
sci.indentation(line) + len(self.comment_str)
)
sci.removeSelectedText()
if line == line_from:
index_from -= len(self.comment_str)
if index_from < 0:
index_from = 0
if line == line_to:
index_to -= len(self.comment_str)
if index_to < 0:
index_to = 0
sci.setSelection(line_from, index_from, line_to, index_to)
sci.endUndoAction()
class Foo(QsciScintilla):
def __init__(self, parent=None):
super().__init__(parent)
# http://www.scintilla.org/ScintillaDoc.html#Folding
self.setFolding(QsciScintilla.BoxedTreeFoldStyle)
# Indentation
self.setIndentationsUseTabs(False)
self.setIndentationWidth(4)
self.setBackspaceUnindents(True)
self.setIndentationGuides(True)
# Set the default font
self.font = QFont()
self.font.setFamily('Consolas')
self.font.setFixedPitch(True)
self.font.setPointSize(10)
self.setFont(self.font)
self.setMarginsFont(self.font)
# Margin 0 is used for line numbers
fontmetrics = QFontMetrics(self.font)
self.setMarginsFont(self.font)
self.setMarginWidth(0, fontmetrics.width("000") + 6)
self.setMarginLineNumbers(0, True)
self.setMarginsBackgroundColor(QColor("#cccccc"))
# Indentation
self.setIndentationsUseTabs(False)
self.setIndentationWidth(4)
self.setBackspaceUnindents(True)
lexer = QsciLexerCPP()
lexer.setFoldAtElse(True)
lexer.setFoldComments(True)
lexer.setFoldCompact(False)
lexer.setFoldPreprocessor(True)
self.setLexer(lexer)
# Use raw messages to Scintilla here
# (all messages are documented here: http://www.scintilla.org/ScintillaDoc.html)
# Ensure the width of the currently visible lines can be scrolled
self.SendScintilla(QsciScintilla.SCI_SETSCROLLWIDTHTRACKING, 1)
# Multiple cursor support
self.SendScintilla(QsciScintilla.SCI_SETMULTIPLESELECTION, True)
self.SendScintilla(QsciScintilla.SCI_SETMULTIPASTE, 1)
self.SendScintilla(
QsciScintilla.SCI_SETADDITIONALSELECTIONTYPING, True)
# Comment feature goes here
self.commenter = Commenter(self, "//")
QShortcut(QKeySequence("Ctrl+7"), self,
self.commenter.toggle_comment_block)
def main():
app = QApplication(sys.argv)
ex = Foo()
ex.setText("""\
#include <iostream>
using namespace std;
void Function0() {
cout << "Function0";
}
void Function1() {
cout << "Function1";
}
void Function2() {
cout << "Function2";
}
void Function3() {
cout << "Function3";
}
int main(void) {
if (1) {
if (1) {
if (1) {
if (1) {
int yay;
}
}
}
}
if (1) {
if (1) {
if (1) {
if (1) {
int yay2;
}
}
}
}
return 0;
}\
""")
ex.resize(800, 600)
ex.show()
sys.exit(app.exec_())
if __name__ == "__main__":
main()
相关的 Qscintilla 文档在这里:
现在该功能只支持单个选择/光标，并且注释方式非常丑陋。如你所见，如果同时按下 Ctrl 和鼠标，就可以创建多个光标/选择。
但目前我还不知道如何实现以下几点：
1) 我希望注释变得对齐，即它们应该从相同缩进级别开始。现有功能会产生丑陋的未对齐注释。下面是我所说的“对齐”的注释示例：
2) 目前仅考虑一个光标/选择。如何循环处理光标/选择来应用 toggle_selection 函数？
3) 我猜如果你循环处理选择，则在特定行中有偶数个光标时，不会对该行进行注释（注释、取消注释）。例如，像这样的情况：
4) 特定行中有奇数个光标将影响该行，因为（注释、取消注释、注释）。例如，像这样的情况：
5) 如果你循环处理光标/选择，就会产生如下输出。
编辑：第一稿
class Commenter():
def __init__(self, sci, comment_str):
self.sci = sci
self.comment_str = comment_str
def selections(self):
regions = []
for i in range(self.sci.SendScintilla(QsciScintilla.SCI_GETSELECTIONS)):
regions.append({
'begin': self.selection_start(i),
'end': self.selection_end(i)
})
return regions
def selection_start(self, selection):
return self.sci.SendScintilla(QsciScintilla.SCI_GETSELECTIONNSTART, selection)
def selection_end(self, selection):
return self.sci.SendScintilla(QsciScintilla.SCI_GETSELECTIONNEND, selection)
def text(self, *args):
return self.sci.text(*args)
def run(self):
send_scintilla = self.sci.SendScintilla
for region in self.selections():
print(region)
print(repr(self.text(region['begin'],region['end'])))
编辑2：我发现我正在尝试实现的功能的源代码可在SublimeText Default.sublime-package（zip文件）中找到，comments.py。该代码不仅支持普通注释//，还支持块注释/* ... */。主要问题是将该代码移植到QScintilla似乎相当棘手 :/