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text.py
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text.py
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from PyQt4 import QtGui, QtCore
from PyQt4.QtCore import Qt, SIGNAL
class MonoTextEdit(QtGui.QTextEdit):
def __init__(self, parent):
from cola.prefs import diff_font, tab_width
QtGui.QTextEdit.__init__(self, parent)
self.setMinimumSize(QtCore.QSize(1, 1))
self.setLineWrapMode(QtGui.QTextEdit.NoWrap)
self.setAcceptRichText(False)
self.setFont(diff_font())
self.set_tab_width(tab_width())
self.setCursorWidth(2)
def set_tab_width(self, tab_width):
display_font = self.font()
space_width = QtGui.QFontMetrics(display_font).width(' ')
self.setTabStopWidth(tab_width * space_width)
def selected_line(self):
cursor = self.textCursor()
offset = cursor.position()
contents = unicode(self.toPlainText())
while (offset >= 1
and contents[offset-1]
and contents[offset-1] != '\n'):
offset -= 1
data = contents[offset:]
if '\n' in data:
line, rest = data.split('\n', 1)
else:
line = data
return line
def mousePressEvent(self, event):
# Move the text cursor so that the right-click events operate
# on the current position, not the last left-clicked position.
if event.button() == Qt.RightButton:
if not self.textCursor().hasSelection():
self.setTextCursor(self.cursorForPosition(event.pos()))
QtGui.QTextEdit.mousePressEvent(self, event)
class MonoTextView(MonoTextEdit):
def __init__(self, parent):
MonoTextEdit.__init__(self, parent)
self.setAcceptDrops(False)
self.setTabChangesFocus(True)
self.setUndoRedoEnabled(False)
self.setTextInteractionFlags(Qt.TextSelectableByKeyboard |
Qt.TextSelectableByMouse)
class DiffTextEdit(MonoTextView):
def __init__(self, parent, whitespace=True):
from cola.qt import DiffSyntaxHighlighter
MonoTextView.__init__(self, parent)
# Diff/patch syntax highlighter
self.highlighter = DiffSyntaxHighlighter(self.document(),
whitespace=whitespace)
class HintedTextWidgetEventFilter(QtCore.QObject):
def __init__(self, parent):
QtCore.QObject.__init__(self, parent)
self.widget = parent
def eventFilter(self, obj, event):
if event.type() == QtCore.QEvent.FocusIn:
self.widget.emit_position()
if self.widget.is_hint():
self.widget.enable_hint(False)
elif event.type() == QtCore.QEvent.FocusOut:
if not bool(self.widget.value()):
self.widget.enable_hint(True)
return False
class HintedTextWidgetMixin(object):
def __init__(self, hint):
self._hint = unicode(self.tr(hint))
self._event_filter = HintedTextWidgetEventFilter(self)
self.installEventFilter(self._event_filter)
# Palette for normal text
self.default_palette = QtGui.QPalette(self.palette())
# Palette used for the placeholder text
self.hint_palette = pal = QtGui.QPalette(self.palette())
color = self.hint_palette.text().color()
color.setAlpha(128)
pal.setColor(QtGui.QPalette.Active, QtGui.QPalette.Text, color)
pal.setColor(QtGui.QPalette.Inactive, QtGui.QPalette.Text, color)
def emit_position(self):
pass
def reset_cursor(self):
pass
def set_hint(self, hint):
is_hint = self.is_hint()
self._hint = hint
if is_hint:
self.enable_hint(True)
def hint(self):
return self._hint
def is_hint(self):
return self.strip() == self._hint
def value(self):
text = self.strip()
if text == self._hint:
return u''
else:
return text
def strip(self):
return self.as_unicode().strip()
def enable_hint(self, hint):
blocksignals = self.blockSignals(True)
if hint:
self.set_value(self.hint())
else:
self.clear()
self.reset_cursor()
self.blockSignals(blocksignals)
self.enable_hint_palette(hint)
def enable_hint_palette(self, hint):
if hint:
self.setPalette(self.hint_palette)
else:
self.setPalette(self.default_palette)
def refresh_palette(self):
self.enable_hint_palette(self.is_hint())
class HintedTextEditMixin(HintedTextWidgetMixin):
def __init__(self, hint):
HintedTextWidgetMixin.__init__(self, hint)
self.connect(self, SIGNAL('cursorPositionChanged()'),
self.emit_position)
def as_unicode(self):
return unicode(self.toPlainText())
def set_value(self, value):
self.setPlainText(value)
self.refresh_palette()
def emit_position(self):
cursor = self.textCursor()
position = cursor.position()
txt = self.as_unicode()
rows = txt[:position].count('\n') + 1
cols = cursor.columnNumber()
self.emit(SIGNAL('cursorPosition(int,int)'), rows, cols)
class HintedTextEdit(MonoTextEdit, HintedTextEditMixin):
def __init__(self, hint, parent=None):
MonoTextEdit.__init__(self, parent)
HintedTextEditMixin.__init__(self, hint)
# The read-only variant.
class HintedTextView(MonoTextView, HintedTextEditMixin):
def __init__(self, hint, parent=None):
MonoTextView.__init__(self, parent)
HintedTextEditMixin.__init__(self, hint)
class HintedLineEdit(QtGui.QLineEdit, HintedTextWidgetMixin):
def __init__(self, hint, parent=None):
from cola.prefs import diff_font
QtGui.QLineEdit.__init__(self, parent)
HintedTextWidgetMixin.__init__(self, hint)
self.setFont(diff_font())
self.connect(self,
SIGNAL('cursorPositionChanged(int,int)'),
lambda x, y: self.emit_position())
def emit_position(self):
cols = self.cursorPosition()
self.emit(SIGNAL('cursorPosition(int,int)'), 1, cols)
def set_value(self, value):
self.setText(value)
self.refresh_palette()
def as_unicode(self):
return unicode(self.text())
def reset_cursor(self):
self.setCursorPosition(0)