def _highlight_surrounding_scopes(self, block):
"""
Highlights the scopes surrounding the current fold scope.
:param block: Block that starts the current fold scope.
"""
scope = FoldScope(block)
if (self._current_scope is None or
self._current_scope.get_range() != scope.get_range()):
self._current_scope = scope
self._clear_scope_decos()
# highlight surrounding parent scopes with a darker color
start, end = scope.get_range()
if not TextBlockHelper.get_fold_trigger_state(block):
self._add_scope_decorations(block, start, end)
def _on_key_pressed(self, event):
"""
Override key press to select the current scope if the user wants
to deleted a folded scope (without selecting it).
"""
delete_request = event.key() in [QtCore.Qt.Key_Backspace,
QtCore.Qt.Key_Delete]
if event.text() or delete_request:
cursor = self.editor.textCursor()
if cursor.hasSelection():
# change selection to encompass the whole scope.
positions_to_check = cursor.selectionStart(), cursor.selectionEnd()
else:
positions_to_check = (cursor.position(), )
for pos in positions_to_check:
block = self.editor.document().findBlock(pos)
th = TextBlockHelper()
if th.is_fold_trigger(block) and th.is_collapsed(block):
self.toggle_fold_trigger(block)
if delete_request and cursor.hasSelection():
scope = FoldScope(self.find_parent_scope(block))
tc = TextHelper(self.editor).select_lines(*scope.get_range())
if tc.selectionStart() > cursor.selectionStart():
start = cursor.selectionStart()
else:
start = tc.selectionStart()
if tc.selectionEnd() < cursor.selectionEnd():
end = cursor.selectionEnd()
else:
end = tc.selectionEnd()
tc.setPosition(start)
tc.setPosition(end, tc.KeepAnchor)
self.editor.setTextCursor(tc)
def _on_key_pressed(self, event):
"""
Override key press to select the current scope if the user wants
to deleted a folded scope (without selecting it).
"""
delete_request = event.key() in [QtCore.Qt.Key_Backspace,
QtCore.Qt.Key_Delete]
if event.text() or delete_request:
cursor = self.editor.textCursor()
if cursor.hasSelection():
# change selection to encompass the whole scope.
positions_to_check = cursor.selectionStart(), cursor.selectionEnd()
else:
positions_to_check = (cursor.position(), )
for pos in positions_to_check:
block = self.editor.document().findBlock(pos)
th = TextBlockHelper()
if th.is_fold_trigger(block) and th.is_collapsed(block):
self.toggle_fold_trigger(block)
if delete_request and cursor.hasSelection():
scope = FoldScope(self.find_parent_scope(block))
tc = TextHelper(self.editor).select_lines(*scope.get_range())
if tc.selectionStart() > cursor.selectionStart():
start = cursor.selectionStart()
else:
start = tc.selectionStart()
if tc.selectionEnd() < cursor.selectionEnd():
end = cursor.selectionEnd()
else:
end = tc.selectionEnd()
tc.setPosition(start)
tc.setPosition(end, tc.KeepAnchor)
self.editor.setTextCursor(tc)
def toggle_fold_trigger(self, block):
"""
Toggle a fold trigger block (expand or collapse it).
:param block: The QTextBlock to expand/collapse
"""
if not TextBlockHelper.is_fold_trigger(block):
return
region = FoldScope(block)
if region.collapsed:
region.unfold()
if self._mouse_over_line is not None:
self._add_scope_decorations(
region._trigger, *region.get_range())
else:
region.fold()
self._clear_scope_decos()
self._refresh_editor_and_scrollbars()
self.trigger_state_changed.emit(region._trigger, region.collapsed)
def _add_scope_decorations(self, block, start, end):
"""
Show a scope decoration on the editor widget
:param start: Start line
:param end: End line
"""
try:
parent = FoldScope(block).parent()
except ValueError:
parent = None
if TextBlockHelper.is_fold_trigger(block):
base_color = self._get_scope_highlight_color()
factor_step = 5
if base_color.lightness() < 128:
factor_step = 10
factor = 70
else:
factor = 100
while parent:
# highlight parent scope
parent_start, parent_end = parent.get_range()
self._add_scope_deco(
start, end + 1, parent_start, parent_end,
base_color, factor)
# next parent scope
start = parent_start
end = parent_end
parent = parent.parent()
factor += factor_step
# global scope
parent_start = 0
parent_end = self.editor.document().blockCount()
self._add_scope_deco(
start, end + 1, parent_start, parent_end, base_color,
factor + factor_step)
else:
self._clear_scope_decos()
