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Mini Shell
Mini Shell
#!/usr/bin/env python3
# License: GPL v3 Copyright: 2020, Kovid Goyal <kovid at kovidgoyal.net>
import re
from qt.core import (
QAction, QFont, QFontMetrics, QStyle, QStyledItemDelegate, Qt, pyqtSignal, QPalette
)
from calibre.gui2 import QT_HIDDEN_CLEAR_ACTION
from calibre.gui2.widgets2 import HistoryComboBox
class ResultsDelegate(QStyledItemDelegate): # {{{
add_ellipsis = True
emphasize_text = True
def result_data(self, result):
if not hasattr(result, 'is_hidden'):
return None, None, None, None, None
return result.is_hidden, result.before, result.text, result.after, False
def paint(self, painter, option, index):
QStyledItemDelegate.paint(self, painter, option, index)
result = index.data(Qt.ItemDataRole.UserRole)
is_hidden, result_before, result_text, result_after, show_leading_dot = self.result_data(result)
if result_text is None:
return
painter.save()
try:
p = option.palette
c = QPalette.ColorRole.HighlightedText if option.state & QStyle.StateFlag.State_Selected else QPalette.ColorRole.Text
group = (QPalette.ColorGroup.Active if option.state & QStyle.StateFlag.State_Active else QPalette.ColorGroup.Inactive)
c = p.color(group, c)
painter.setPen(c)
font = option.font
if self.emphasize_text:
emphasis_font = QFont(font)
emphasis_font.setBold(True)
else:
emphasis_font = font
flags = Qt.AlignmentFlag.AlignTop | Qt.TextFlag.TextSingleLine | Qt.TextFlag.TextIncludeTrailingSpaces
rect = option.rect.adjusted(option.decorationSize.width() + 4 if is_hidden else 0, 0, 0, 0)
painter.setClipRect(rect)
before = re.sub(r'\s+', ' ', result_before)
if show_leading_dot:
before = '•' + before
before_width = 0
if before:
before_width = painter.boundingRect(rect, flags, before).width()
after = re.sub(r'\s+', ' ', result_after.rstrip())
after_width = 0
if after:
after_width = painter.boundingRect(rect, flags, after).width()
ellipsis_width = painter.boundingRect(rect, flags, '...').width()
painter.setFont(emphasis_font)
text = re.sub(r'\s+', ' ', result_text)
match_width = painter.boundingRect(rect, flags, text).width()
if match_width >= rect.width() - 3 * ellipsis_width:
efm = QFontMetrics(emphasis_font)
if show_leading_dot:
text = '•' + text
text = efm.elidedText(text, Qt.TextElideMode.ElideRight, rect.width())
painter.drawText(rect, flags, text)
else:
self.draw_match(
painter, flags, before, text, after, rect, before_width, match_width, after_width, ellipsis_width, emphasis_font, font)
except Exception:
import traceback
traceback.print_exc()
painter.restore()
def draw_match(self, painter, flags, before, text, after, rect, before_width, match_width, after_width, ellipsis_width, emphasis_font, normal_font):
extra_width = int(rect.width() - match_width)
if before_width < after_width:
left_width = min(extra_width // 2, before_width)
right_width = extra_width - left_width
else:
right_width = min(extra_width // 2, after_width)
left_width = min(before_width, extra_width - right_width)
x = rect.left()
nfm = QFontMetrics(normal_font)
if before_width and left_width:
r = rect.adjusted(0, 0, 0, 0)
r.setRight(x + left_width)
painter.setFont(normal_font)
ebefore = nfm.elidedText(before, Qt.TextElideMode.ElideLeft, left_width)
if self.add_ellipsis and ebefore == before:
ebefore = '…' + before[1:]
r.setLeft(x)
x += painter.drawText(r, flags, ebefore).width()
painter.setFont(emphasis_font)
r = rect.adjusted(0, 0, 0, 0)
r.setLeft(x)
painter.drawText(r, flags, text).width()
x += match_width
if after_width and right_width:
painter.setFont(normal_font)
r = rect.adjusted(0, 0, 0, 0)
r.setLeft(x)
eafter = nfm.elidedText(after, Qt.TextElideMode.ElideRight, right_width)
if self.add_ellipsis and eafter == after:
eafter = after[:-1] + '…'
painter.setFont(normal_font)
painter.drawText(r, flags, eafter)
# }}}
class SearchBox(HistoryComboBox): # {{{
history_saved = pyqtSignal(object, object)
history_cleared = pyqtSignal()
cleared = pyqtSignal()
def __init__(self, parent=None):
HistoryComboBox.__init__(self, parent)
self.lineEdit().setPlaceholderText(_('Search'))
self.lineEdit().setClearButtonEnabled(True)
ac = self.lineEdit().findChild(QAction, QT_HIDDEN_CLEAR_ACTION)
if ac is not None:
ac.triggered.connect(self.cleared)
def save_history(self):
ret = HistoryComboBox.save_history(self)
self.history_saved.emit(self.text(), self.history)
return ret
def clear_history(self):
super().clear_history()
self.history_cleared.emit()
def contextMenuEvent(self, event):
menu = self.lineEdit().createStandardContextMenu()
menu.addSeparator()
menu.addAction(_('Clear search history'), self.clear_history)
menu.exec(event.globalPos())
# }}}
Zerion Mini Shell 1.0