class FoldingPanel(Panel):
"""
Displays the document outline and lets the user collapse/expand blocks.
The data represented by the panel come from the Language Server Protocol
invoked via the CodeEditor. This panel stores information about both
folding regions and their folding state.
"""
#: signal emitted when a fold trigger state has changed, parameters are
#: the concerned text block and the new state (collapsed or not).
trigger_state_changed = Signal(QTextBlock, bool)
collapse_all_triggered = Signal()
expand_all_triggered = Signal()
@property
def native_icons(self):
"""
Defines whether the panel will use native indicator icons or
use custom ones.
If you want to use custom indicator icons, you must first
set this flag to False.
"""
return self.native_icons
@native_icons.setter
def native_icons(self, value):
self._native_icons = value
# propagate changes to every clone
if self.editor:
for clone in self.editor.clones:
try:
clone.modes.get(self.__class__).native_icons = value
except KeyError:
# this should never happen since we're working with clones
pass
@property
def indicators_icons(self):
"""
Gets/sets the icons for the fold indicators.
The list of indicators is interpreted as follow::
(COLLAPSED_OFF, COLLAPSED_ON, EXPANDED_OFF, EXPANDED_ON)
To use this property you must first set `native_icons` to False.
:returns: tuple(str, str, str, str)
"""
return self._indicators_icons
@indicators_icons.setter
def indicators_icons(self, value):
if len(value) != 4:
raise ValueError('The list of custom indicators must contains 4 '
'strings')
self._indicators_icons = value
if self.editor:
# propagate changes to every clone
for clone in self.editor.clones:
try:
clone.modes.get(self.__class__).indicators_icons = value
except KeyError:
# this should never happen since we're working with clones
pass
@property
def highlight_caret_scope(self):
"""
True to highlight the caret scope automatically.
(Similar to the ``Highlight blocks in Qt Creator``.
Default is False.
"""
return self._highlight_caret
@highlight_caret_scope.setter
def highlight_caret_scope(self, value):
if value != self._highlight_caret:
self._highlight_caret = value
if self.editor:
if value:
self._block_nbr = -1
self.editor.cursorPositionChanged.connect(
self._highlight_caret_scope)
else:
self._block_nbr = -1
self.editor.cursorPositionChanged.disconnect(
self._highlight_caret_scope)
for clone in self.editor.clones:
try:
clone.modes.get(
self.__class__).highlight_caret_scope = value
except KeyError:
# this should never happen since we're working with
# clones
pass
def __init__(self, highlight_caret_scope=False):
Panel.__init__(self)
self._native_icons = False
self._indicators_icons = ('folding.arrow_right_off',
'folding.arrow_right_on',
'folding.arrow_down_off',
'folding.arrow_down_on')
self._block_nbr = -1
self._highlight_caret = False
self.highlight_caret_scope = highlight_caret_scope
self._indic_size = 16
#: the list of deco used to highlight the current fold region (
#: surrounding regions are darker)
self._scope_decos = []
#: the list of folded blocs decorations
self._block_decos = {}
self.setMouseTracking(True)
self.scrollable = True
self._mouse_over_line = None
self._current_scope = None
self._prev_cursor = None
self.context_menu = None
self.action_collapse = None
self.action_expand = None
self.action_collapse_all = None
self.action_expand_all = None
self._original_background = None
self._display_folding = False
self._key_pressed = False
self._highlight_runner = DelayJobRunner(delay=250)
self.current_tree = IntervalTree()
self.root = FoldingRegion(None, None)
self.folding_regions = {}
self.folding_status = {}
self.folding_levels = {}
self.folding_nesting = {}
def update_folding(self, folding_info):
"""Update folding panel folding ranges."""
if folding_info is None:
return
(self.current_tree, self.root, self.folding_regions,
self.folding_nesting, self.folding_levels,
self.folding_status) = folding_info
self.update()
def sizeHint(self):
"""Returns the widget size hint (based on the editor font size) """
fm = QFontMetricsF(self.editor.font())
size_hint = QSize(ceil(fm.height()), ceil(fm.height()))
if size_hint.width() > 16:
size_hint.setWidth(16)
return size_hint
def _draw_collapsed_indicator(self,
line_number,
top_position,
block,
painter,
mouse_hover=False):
if line_number in self.folding_regions:
collapsed = self.folding_status[line_number]
line_end = self.folding_regions[line_number]
mouse_over = self._mouse_over_line == line_number
if not mouse_hover:
self._draw_fold_indicator(top_position, mouse_over, collapsed,
painter)
if collapsed:
if mouse_hover:
self._draw_fold_indicator(top_position, mouse_over,
collapsed, painter)
# check if the block already has a decoration,
# it might have been folded by the parent
# editor/document in the case of cloned editor
for deco_line in self._block_decos:
deco = self._block_decos[deco_line]
if deco.block == block:
# no need to add a deco, just go to the
# next block
break
else:
self._add_fold_decoration(block, line_end)
elif not mouse_hover:
for deco_line in list(self._block_decos.keys()):
deco = self._block_decos[deco_line]
# check if the block decoration has been removed, it
# might have been unfolded by the parent
# editor/document in the case of cloned editor
if deco.block == block:
# remove it and
self._block_decos.pop(deco_line)
self.editor.decorations.remove(deco)
del deco
break
def paintEvent(self, event):
# Paints the fold indicators and the possible fold region background
# on the folding panel.
super(FoldingPanel, self).paintEvent(event)
painter = QPainter(self)
if not self._display_folding and not self._key_pressed:
if any(self.folding_status.values()):
for info in self.editor.visible_blocks:
top_position, line_number, block = info
self._draw_collapsed_indicator(line_number,
top_position,
block,
painter,
mouse_hover=True)
return
# Draw background over the selected non collapsed fold region
if self._mouse_over_line is not None:
block = self.editor.document().findBlockByNumber(
self._mouse_over_line)
try:
self._draw_fold_region_background(block, painter)
except (ValueError, KeyError):
# Catching the KeyError above is necessary to avoid
# issue spyder-ide/spyder#10918.
# It happens when users have the mouse on top of the
# folding panel and make some text modifications
# that trigger a folding recomputation.
pass
# Draw fold triggers
for top_position, line_number, block in self.editor.visible_blocks:
self._draw_collapsed_indicator(line_number,
top_position,
block,
painter,
mouse_hover=False)
def _draw_fold_region_background(self, block, painter):
"""
Draw the fold region when the mouse is over and non collapsed
indicator.
:param top: Top position
:param block: Current block.
:param painter: QPainter
"""
th = TextHelper(self.editor)
start = block.blockNumber()
end = self.folding_regions[start]
if start > 0:
top = th.line_pos_from_number(start)
else:
top = 0
bottom = th.line_pos_from_number(end)
h = bottom - top
if h == 0:
h = self.sizeHint().height()
w = self.sizeHint().width()
self._draw_rect(QRectF(0, top, w, h), painter)
def _draw_rect(self, rect, painter):
"""
Draw the background rectangle using the current style primitive color.
:param rect: The fold zone rect to draw
:param painter: The widget's painter.
"""
c = self.editor.sideareas_color
grad = QLinearGradient(rect.topLeft(), rect.topRight())
if sys.platform == 'darwin':
grad.setColorAt(0, c.lighter(100))
grad.setColorAt(1, c.lighter(110))
outline = c.darker(110)
else:
grad.setColorAt(0, c.lighter(110))
grad.setColorAt(1, c.lighter(130))
outline = c.darker(100)
painter.fillRect(rect, grad)
painter.setPen(QPen(outline))
painter.drawLine(rect.topLeft() + QPointF(1, 0),
rect.topRight() - QPointF(1, 0))
painter.drawLine(rect.bottomLeft() + QPointF(1, 0),
rect.bottomRight() - QPointF(1, 0))
painter.drawLine(rect.topRight() + QPointF(0, 1),
rect.bottomRight() - QPointF(0, 1))
painter.drawLine(rect.topLeft() + QPointF(0, 1),
rect.bottomLeft() - QPointF(0, 1))
def _draw_fold_indicator(self, top, mouse_over, collapsed, painter):
"""
Draw the fold indicator/trigger (arrow).
:param top: Top position
:param mouse_over: Whether the mouse is over the indicator
:param collapsed: Whether the trigger is collapsed or not.
:param painter: QPainter
"""
rect = QRect(0, top, self.sizeHint().width(), self.sizeHint().height())
if self._native_icons:
opt = QStyleOptionViewItem()
opt.rect = rect
opt.state = (QStyle.State_Active | QStyle.State_Item
| QStyle.State_Children)
if not collapsed:
opt.state |= QStyle.State_Open
if mouse_over:
opt.state |= (QStyle.State_MouseOver | QStyle.State_Enabled
| QStyle.State_Selected)
opt.palette.setBrush(QPalette.Window,
self.palette().highlight())
opt.rect.translate(-2, 0)
self.style().drawPrimitive(QStyle.PE_IndicatorBranch, opt, painter,
self)
else:
index = 0
if not collapsed:
index = 2
if mouse_over:
index += 1
ima.icon(self._indicators_icons[index]).paint(painter, rect)
def find_parent_scope(self, block):
"""Find parent scope, if the block is not a fold trigger."""
block_line = block.blockNumber()
if block_line not in self.folding_regions:
for start_line in self.folding_regions:
end_line = self.folding_regions[start_line]
if end_line > block_line:
if start_line < block_line:
block = self.editor.document().findBlockByNumber(
start_line)
break
return block
def _clear_scope_decos(self):
"""Clear scope decorations (on the editor)"""
for deco in self._scope_decos:
self.editor.decorations.remove(deco)
self._scope_decos[:] = []
def _get_scope_highlight_color(self):
"""
Gets the base scope highlight color (derivated from the editor
background)
For lighter themes will be a darker color,
and for darker ones will be a lighter color
"""
color = self.editor.sideareas_color
if color.lightness() < 128:
color = drift_color(color, 130)
else:
color = drift_color(color, 105)
return color
def _decorate_block(self, start, end):
"""
Create a decoration and add it to the editor.
Args:
start (int) start line of the decoration
end (int) end line of the decoration
"""
color = self._get_scope_highlight_color()
draw_order = DRAW_ORDERS.get('codefolding')
d = TextDecoration(self.editor.document(),
start_line=max(0, start - 1),
end_line=end,
draw_order=draw_order)
d.set_background(color)
d.set_full_width(True, clear=False)
self.editor.decorations.add(d)
self._scope_decos.append(d)
def _highlight_block(self, block):
"""
Highlights the current fold scope.
:param block: Block that starts the current fold scope.
"""
block_line = block.blockNumber()
end_line = self.folding_regions[block_line]
scope = (block_line, end_line)
if (self._current_scope is None or self._current_scope != scope):
self._current_scope = scope
self._clear_scope_decos()
# highlight current scope with darker or lighter color
start, end = scope
if not self.folding_status[start]:
self._decorate_block(start, end)
def mouseMoveEvent(self, event):
"""
Detect mouser over indicator and highlight the current scope in the
editor (up and down decoration arround the foldable text when the mouse
is over an indicator).
:param event: event
"""
super(FoldingPanel, self).mouseMoveEvent(event)
th = TextHelper(self.editor)
line = th.line_nbr_from_position(event.pos().y())
if line >= 0:
block = self.editor.document().findBlockByNumber(line)
block = self.find_parent_scope(block)
line_number = block.blockNumber()
if line_number in self.folding_regions:
if self._mouse_over_line is None:
# mouse enter fold scope
QApplication.setOverrideCursor(
QCursor(Qt.PointingHandCursor))
if (self._mouse_over_line != block.blockNumber()
and self._mouse_over_line is not None):
# fold scope changed, a previous block was highlighter so
# we quickly update our highlighting
self._mouse_over_line = block.blockNumber()
try:
self._highlight_block(block)
except KeyError:
# Catching the KeyError above is necessary to avoid
# issue spyder-ide/spyder#13230.
pass
else:
# same fold scope, request highlight
self._mouse_over_line = block.blockNumber()
try:
self._highlight_runner.request_job(
self._highlight_block, block)
except KeyError:
# Catching the KeyError above is necessary to avoid
# issue spyder-ide/spyder#11291.
pass
self._highight_block = block
else:
# no fold scope to highlight, cancel any pending requests
self._highlight_runner.cancel_requests()
self._mouse_over_line = None
QApplication.restoreOverrideCursor()
self.repaint()
def enterEvent(self, event):
self._display_folding = True
self.repaint()
def leaveEvent(self, event):
"""
Removes scope decorations and background from the editor and the panel
if highlight_caret_scope, else simply update the scope decorations to
match the caret scope.
"""
super(FoldingPanel, self).leaveEvent(event)
QApplication.restoreOverrideCursor()
self._highlight_runner.cancel_requests()
if not self.highlight_caret_scope:
self._clear_scope_decos()
self._mouse_over_line = None
self._current_scope = None
else:
self._block_nbr = -1
self._highlight_caret_scope()
self.editor.repaint()
self._display_folding = False
def _add_fold_decoration(self, block, end_line):
"""
Add fold decorations (boxes arround a folded block in the editor
widget).
"""
start_line = block.blockNumber()
text = self.editor.get_text_region(start_line + 1, end_line)
draw_order = DRAW_ORDERS.get('codefolding')
deco = TextDecoration(block, draw_order=draw_order)
deco.signals.clicked.connect(self._on_fold_deco_clicked)
deco.tooltip = text
deco.block = block
deco.select_line()
deco.set_outline(drift_color(self._get_scope_highlight_color(), 110))
deco.set_background(self._get_scope_highlight_color())
deco.set_foreground(QColor('#808080'))
self._block_decos[start_line] = deco
self.editor.decorations.add(deco)
def _get_block_until_line(self, block, end_line):
while block.blockNumber() <= end_line and block.isValid():
block.setVisible(False)
block = block.next()
return block
def fold_region(self, block, start_line, end_line):
"""Fold region spanned by *start_line* and *end_line*."""
while block.blockNumber() < end_line and block.isValid():
block.setVisible(False)
block = block.next()
return block
def unfold_region(self, block, start_line, end_line):
"""Unfold region spanned by *start_line* and *end_line*."""
if start_line - 1 in self._block_decos:
deco = self._block_decos[start_line - 1]
self._block_decos.pop(start_line - 1)
self.editor.decorations.remove(deco)
while block.blockNumber() < end_line and block.isValid():
current_line = block.blockNumber()
block.setVisible(True)
get_next = True
if (current_line in self.folding_regions
and current_line != start_line):
block_end = self.folding_regions[current_line]
if self.folding_status[current_line]:
# Skip setting visible blocks until the block is done
get_next = False
block = self._get_block_until_line(block, block_end - 1)
# pass
if get_next:
block = block.next()
def toggle_fold_trigger(self, block):
"""
Toggle a fold trigger block (expand or collapse it).
:param block: The QTextBlock to expand/collapse
"""
start_line = block.blockNumber()
if start_line not in self.folding_regions:
return
end_line = self.folding_regions[start_line]
if self.folding_status[start_line]:
self.unfold_region(block, start_line, end_line)
self.folding_status[start_line] = False
if self._mouse_over_line is not None:
self._decorate_block(start_line, end_line)
else:
self.fold_region(block, start_line, end_line)
self.folding_status[start_line] = True
self._clear_scope_decos()
self._refresh_editor_and_scrollbars()
def mousePressEvent(self, event):
"""Folds/unfolds the pressed indicator if any."""
if self._mouse_over_line is not None:
block = self.editor.document().findBlockByNumber(
self._mouse_over_line)
self.toggle_fold_trigger(block)
def _on_fold_deco_clicked(self, deco):
"""Unfold a folded block that has just been clicked by the user"""
self.toggle_fold_trigger(deco.block)
def on_state_changed(self, state):
"""
On state changed we (dis)connect to the cursorPositionChanged signal
"""
if state:
self.editor.sig_key_pressed.connect(self._on_key_pressed)
if self._highlight_caret:
self.editor.cursorPositionChanged.connect(
self._highlight_caret_scope)
self._block_nbr = -1
self.editor.new_text_set.connect(self._clear_block_deco)
else:
self.editor.sig_key_pressed.disconnect(self._on_key_pressed)
if self._highlight_caret:
self.editor.cursorPositionChanged.disconnect(
self._highlight_caret_scope)
self._block_nbr = -1
self.editor.new_text_set.disconnect(self._clear_block_deco)
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 {Qt.Key_Delete, Qt.Key_Backspace}
cursor = self.editor.textCursor()
if cursor.hasSelection():
if event.key() == Qt.Key_Return:
delete_request = True
if event.text() or delete_request:
self._key_pressed = True
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)
start_line = block.blockNumber() + 2
if (start_line in self.folding_regions
and self.folding_status[start_line]):
end_line = self.folding_regions[start_line]
if delete_request and cursor.hasSelection():
tc = TextHelper(self.editor).select_lines(
start_line, end_line)
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)
self._key_pressed = False
def _refresh_editor_and_scrollbars(self):
"""
Refrehes editor content and scollbars.
We generate a fake resize event to refresh scroll bar.
We have the same problem as described here:
http://www.qtcentre.org/threads/44803 and we apply the same solution
(don't worry, there is no visual effect, the editor does not grow up
at all, even with a value = 500)
"""
TextHelper(self.editor).mark_whole_doc_dirty()
self.editor.repaint()
s = self.editor.size()
s.setWidth(s.width() + 1)
self.editor.resizeEvent(QResizeEvent(self.editor.size(), s))
def collapse_all(self):
"""
Collapses all triggers and makes all blocks with fold level > 0
invisible.
"""
self._clear_block_deco()
block = self.editor.document().firstBlock()
while block.isValid():
line_number = block.blockNumber()
if line_number in self.folding_regions:
end_line = self.folding_regions[line_number]
self.fold_region(block, line_number, end_line)
block = block.next()
self._refresh_editor_and_scrollbars()
tc = self.editor.textCursor()
tc.movePosition(tc.Start)
self.editor.setTextCursor(tc)
self.collapse_all_triggered.emit()
def _clear_block_deco(self):
"""Clear the folded block decorations."""
for deco_line in self._block_decos:
deco = self._block_decos[deco_line]
self.editor.decorations.remove(deco)
self._block_decos = {}
def expand_all(self):
"""Expands all fold triggers."""
block = self.editor.document().firstBlock()
while block.isValid():
line_number = block.BlockNumber()
if line_number in self.folding_regions:
end_line = self.folding_regions[line_number]
self.unfold_region(block, line_number, end_line)
block = block.next()
self._clear_block_deco()
self._refresh_editor_and_scrollbars()
self.expand_all_triggered.emit()
def _highlight_caret_scope(self):
"""
Highlight the scope of the current caret position.
This get called only if :attr:`
spyder.widgets.panels.FoldingPanel.highlight_care_scope` is True.
"""
cursor = self.editor.textCursor()
block_nbr = cursor.blockNumber()
if self._block_nbr != block_nbr:
block = self.find_parent_scope(cursor.block())
line_number = block.blockNumber()
if line_number in self.folding_regions:
self._mouse_over_line = block.blockNumber()
try:
self._highlight_block(block)
except KeyError:
# Catching the KeyError above is necessary to avoid
# issue spyder-ide/spyder#13230.
pass
else:
self._clear_scope_decos()
self._block_nbr = block_nbr
class FoldingPanel(Panel):
"""
Displays the document outline and lets the user collapse/expand blocks.
The data represented by the panel come from the text block user state and
is set by the SyntaxHighlighter mode.
The panel does not expose any function that you can use directly. To
interact with the fold tree, you need to modify text block fold level or
trigger state using :class:`spyder.api.utils.TextBlockHelper` or
:mod:`spyder.api.folding`
"""
#: signal emitted when a fold trigger state has changed, parameters are
#: the concerned text block and the new state (collapsed or not).
trigger_state_changed = Signal(QTextBlock, bool)
collapse_all_triggered = Signal()
expand_all_triggered = Signal()
@property
def native_icons(self):
"""
Defines whether the panel will use native indicator icons or
use custom ones.
If you want to use custom indicator icons, you must first
set this flag to False.
"""
return self.native_icons
@native_icons.setter
def native_icons(self, value):
self._native_icons = value
# propagate changes to every clone
if self.editor:
for clone in self.editor.clones:
try:
clone.modes.get(self.__class__).native_icons = value
except KeyError:
# this should never happen since we're working with clones
pass
@property
def indicators_icons(self):
"""
Gets/sets the icons for the fold indicators.
The list of indicators is interpreted as follow::
(COLLAPSED_OFF, COLLAPSED_ON, EXPANDED_OFF, EXPANDED_ON)
To use this property you must first set `native_icons` to False.
:returns: tuple(str, str, str, str)
"""
return self._indicators_icons
@indicators_icons.setter
def indicators_icons(self, value):
if len(value) != 4:
raise ValueError('The list of custom indicators must contains 4 '
'strings')
self._indicators_icons = value
if self.editor:
# propagate changes to every clone
for clone in self.editor.clones:
try:
clone.modes.get(self.__class__).indicators_icons = value
except KeyError:
# this should never happen since we're working with clones
pass
@property
def highlight_caret_scope(self):
"""
True to highlight the caret scope automatically.
(Similar to the ``Highlight blocks in Qt Creator``.
Default is False.
"""
return self._highlight_caret
@highlight_caret_scope.setter
def highlight_caret_scope(self, value):
if value != self._highlight_caret:
self._highlight_caret = value
if self.editor:
if value:
self._block_nbr = -1
self.editor.cursorPositionChanged.connect(
self._highlight_caret_scope)
else:
self._block_nbr = -1
self.editor.cursorPositionChanged.disconnect(
self._highlight_caret_scope)
for clone in self.editor.clones:
try:
clone.modes.get(
self.__class__).highlight_caret_scope = value
except KeyError:
# this should never happen since we're working with
# clones
pass
def __init__(self, highlight_caret_scope=False):
Panel.__init__(self)
self._native_icons = False
self._indicators_icons = ('folding.arrow_right_off',
'folding.arrow_right_on',
'folding.arrow_down_off',
'folding.arrow_down_on')
self._block_nbr = -1
self._highlight_caret = False
self.highlight_caret_scope = highlight_caret_scope
self._indic_size = 16
#: the list of deco used to highlight the current fold region (
#: surrounding regions are darker)
self._scope_decos = []
#: the list of folded blocs decorations
self._block_decos = []
self.setMouseTracking(True)
self.scrollable = True
self._mouse_over_line = None
self._current_scope = None
self._prev_cursor = None
self.context_menu = None
self.action_collapse = None
self.action_expand = None
self.action_collapse_all = None
self.action_expand_all = None
self._original_background = None
self._highlight_runner = DelayJobRunner(delay=250)
def sizeHint(self):
"""Returns the widget size hint (based on the editor font size) """
fm = QFontMetricsF(self.editor.font())
size_hint = QSize(ceil(fm.height()), ceil(fm.height()))
if size_hint.width() > 16:
size_hint.setWidth(16)
return size_hint
def paintEvent(self, event):
# Paints the fold indicators and the possible fold region background
# on the folding panel.
super(FoldingPanel, self).paintEvent(event)
painter = QPainter(self)
# Draw background over the selected non collapsed fold region
if self._mouse_over_line is not None:
block = self.editor.document().findBlockByNumber(
self._mouse_over_line)
try:
self._draw_fold_region_background(block, painter)
except ValueError:
pass
# Draw fold triggers
for top_position, line_number, block in self.editor.visible_blocks:
if TextBlockHelper.is_fold_trigger(block):
collapsed = TextBlockHelper.is_collapsed(block)
mouse_over = self._mouse_over_line == line_number
self._draw_fold_indicator(top_position, mouse_over, collapsed,
painter)
if collapsed:
# check if the block already has a decoration, it might
# have been folded by the parent editor/document in the
# case of cloned editor
for deco in self._block_decos:
if deco.block == block:
# no need to add a deco, just go to the next block
break
else:
self._add_fold_decoration(block, FoldScope(block))
else:
for deco in self._block_decos:
# check if the block decoration has been removed, it
# might have been unfolded by the parent
# editor/document in the case of cloned editor
if deco.block == block:
# remove it and
self._block_decos.remove(deco)
self.editor.decorations.remove(deco)
del deco
break
def _draw_fold_region_background(self, block, painter):
"""
Draw the fold region when the mouse is over and non collapsed
indicator.
:param top: Top position
:param block: Current block.
:param painter: QPainter
"""
r = FoldScope(block)
th = TextHelper(self.editor)
start, end = r.get_range(ignore_blank_lines=True)
if start > 0:
top = th.line_pos_from_number(start)
else:
top = 0
bottom = th.line_pos_from_number(end + 1)
h = bottom - top
if h == 0:
h = self.sizeHint().height()
w = self.sizeHint().width()
self._draw_rect(QRectF(0, top, w, h), painter)
def _draw_rect(self, rect, painter):
"""
Draw the background rectangle using the current style primitive color.
:param rect: The fold zone rect to draw
:param painter: The widget's painter.
"""
c = self.editor.sideareas_color
grad = QLinearGradient(rect.topLeft(), rect.topRight())
if sys.platform == 'darwin':
grad.setColorAt(0, c.lighter(100))
grad.setColorAt(1, c.lighter(110))
outline = c.darker(110)
else:
grad.setColorAt(0, c.lighter(110))
grad.setColorAt(1, c.lighter(130))
outline = c.darker(100)
painter.fillRect(rect, grad)
painter.setPen(QPen(outline))
painter.drawLine(rect.topLeft() + QPointF(1, 0),
rect.topRight() - QPointF(1, 0))
painter.drawLine(rect.bottomLeft() + QPointF(1, 0),
rect.bottomRight() - QPointF(1, 0))
painter.drawLine(rect.topRight() + QPointF(0, 1),
rect.bottomRight() - QPointF(0, 1))
painter.drawLine(rect.topLeft() + QPointF(0, 1),
rect.bottomLeft() - QPointF(0, 1))
def _draw_fold_indicator(self, top, mouse_over, collapsed, painter):
"""
Draw the fold indicator/trigger (arrow).
:param top: Top position
:param mouse_over: Whether the mouse is over the indicator
:param collapsed: Whether the trigger is collapsed or not.
:param painter: QPainter
"""
rect = QRect(0, top, self.sizeHint().width(), self.sizeHint().height())
if self._native_icons:
opt = QStyleOptionViewItem()
opt.rect = rect
opt.state = (QStyle.State_Active | QStyle.State_Item
| QStyle.State_Children)
if not collapsed:
opt.state |= QStyle.State_Open
if mouse_over:
opt.state |= (QStyle.State_MouseOver | QStyle.State_Enabled
| QStyle.State_Selected)
opt.palette.setBrush(QPalette.Window,
self.palette().highlight())
opt.rect.translate(-2, 0)
self.style().drawPrimitive(QStyle.PE_IndicatorBranch, opt, painter,
self)
else:
index = 0
if not collapsed:
index = 2
if mouse_over:
index += 1
ima.icon(self._indicators_icons[index]).paint(painter, rect)
@staticmethod
def find_parent_scope(block):
"""Find parent scope, if the block is not a fold trigger."""
original = block
if not TextBlockHelper.is_fold_trigger(block):
# search level of next non blank line
while block.text().strip() == '' and block.isValid():
block = block.next()
ref_lvl = TextBlockHelper.get_fold_lvl(block) - 1
block = original
while (block.blockNumber()
and (not TextBlockHelper.is_fold_trigger(block)
or TextBlockHelper.get_fold_lvl(block) > ref_lvl)):
block = block.previous()
return block
def _clear_scope_decos(self):
"""Clear scope decorations (on the editor)"""
for deco in self._scope_decos:
self.editor.decorations.remove(deco)
self._scope_decos[:] = []
def _get_scope_highlight_color(self):
"""
Gets the base scope highlight color (derivated from the editor
background)
For lighter themes will be a darker color,
and for darker ones will be a lighter color
"""
color = self.editor.sideareas_color
if color.lightness() < 128:
color = drift_color(color, 130)
else:
color = drift_color(color, 105)
return color
def _decorate_block(self, start, end):
"""
Create a decoration and add it to the editor.
Args:
start (int) start line of the decoration
end (int) end line of the decoration
"""
color = self._get_scope_highlight_color()
draw_order = DRAW_ORDERS.get('codefolding')
d = TextDecoration(self.editor.document(),
start_line=start,
end_line=end + 1,
draw_order=draw_order)
d.set_background(color)
d.set_full_width(True, clear=False)
self.editor.decorations.add(d)
self._scope_decos.append(d)
def _highlight_block(self, block):
"""
Highlights 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 current scope with darker or lighter color
start, end = scope.get_range()
if not TextBlockHelper.is_collapsed(block):
self._decorate_block(start, end)
def mouseMoveEvent(self, event):
"""
Detect mouser over indicator and highlight the current scope in the
editor (up and down decoration arround the foldable text when the mouse
is over an indicator).
:param event: event
"""
super(FoldingPanel, self).mouseMoveEvent(event)
th = TextHelper(self.editor)
line = th.line_nbr_from_position(event.pos().y())
if line >= 0:
block = FoldScope.find_parent_scope(
self.editor.document().findBlockByNumber(line - 1))
if TextBlockHelper.is_fold_trigger(block):
if self._mouse_over_line is None:
# mouse enter fold scope
QApplication.setOverrideCursor(
QCursor(Qt.PointingHandCursor))
if self._mouse_over_line != block.blockNumber() and \
self._mouse_over_line is not None:
# fold scope changed, a previous block was highlighter so
# we quickly update our highlighting
self._mouse_over_line = block.blockNumber()
self._highlight_block(block)
else:
# same fold scope, request highlight
self._mouse_over_line = block.blockNumber()
self._highlight_runner.request_job(self._highlight_block,
block)
self._highight_block = block
else:
# no fold scope to highlight, cancel any pending requests
self._highlight_runner.cancel_requests()
self._mouse_over_line = None
QApplication.restoreOverrideCursor()
self.repaint()
def leaveEvent(self, event):
"""
Removes scope decorations and background from the editor and the panel
if highlight_caret_scope, else simply update the scope decorations to
match the caret scope.
"""
super(FoldingPanel, self).leaveEvent(event)
QApplication.restoreOverrideCursor()
self._highlight_runner.cancel_requests()
if not self.highlight_caret_scope:
self._clear_scope_decos()
self._mouse_over_line = None
self._current_scope = None
else:
self._block_nbr = -1
self._highlight_caret_scope()
self.editor.repaint()
def _add_fold_decoration(self, block, region):
"""
Add fold decorations (boxes arround a folded block in the editor
widget).
"""
draw_order = DRAW_ORDERS.get('codefolding')
deco = TextDecoration(block, draw_order=draw_order)
deco.signals.clicked.connect(self._on_fold_deco_clicked)
deco.tooltip = region.text(max_lines=25)
deco.block = block
deco.select_line()
deco.set_outline(drift_color(self._get_scope_highlight_color(), 110))
deco.set_background(self._get_scope_highlight_color())
deco.set_foreground(QColor('#808080'))
self._block_decos.append(deco)
self.editor.decorations.add(deco)
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._decorate_block(*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 mousePressEvent(self, event):
"""Folds/unfolds the pressed indicator if any."""
if self._mouse_over_line is not None:
block = self.editor.document().findBlockByNumber(
self._mouse_over_line)
self.toggle_fold_trigger(block)
def _on_fold_deco_clicked(self, deco):
"""Unfold a folded block that has just been clicked by the user"""
self.toggle_fold_trigger(deco.block)
def on_state_changed(self, state):
"""
On state changed we (dis)connect to the cursorPositionChanged signal
"""
if state:
self.editor.sig_key_pressed.connect(self._on_key_pressed)
if self._highlight_caret:
self.editor.cursorPositionChanged.connect(
self._highlight_caret_scope)
self._block_nbr = -1
self.editor.new_text_set.connect(self._clear_block_deco)
else:
self.editor.sig_key_pressed.disconnect(self._on_key_pressed)
if self._highlight_caret:
self.editor.cursorPositionChanged.disconnect(
self._highlight_caret_scope)
self._block_nbr = -1
self.editor.new_text_set.disconnect(self._clear_block_deco)
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 [Qt.Key_Backspace, 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)
@staticmethod
def _show_previous_blank_lines(block):
"""
Show the block previous blank lines
"""
# set previous blank lines visibles
pblock = block.previous()
while (pblock.text().strip() == '' and pblock.blockNumber() >= 0):
pblock.setVisible(True)
pblock = pblock.previous()
def refresh_decorations(self, force=False):
"""
Refresh decorations colors. This function is called by the syntax
highlighter when the style changed so that we may update our
decorations colors according to the new style.
"""
cursor = self.editor.textCursor()
if (self._prev_cursor is None or force
or self._prev_cursor.blockNumber() != cursor.blockNumber()):
for deco in self._block_decos:
self.editor.decorations.remove(deco)
for deco in self._block_decos:
deco.set_outline(
drift_color(self._get_scope_highlight_color(), 110))
deco.set_background(self._get_scope_highlight_color())
self.editor.decorations.add(deco)
self._prev_cursor = cursor
def _refresh_editor_and_scrollbars(self):
"""
Refrehes editor content and scollbars.
We generate a fake resize event to refresh scroll bar.
We have the same problem as described here:
http://www.qtcentre.org/threads/44803 and we apply the same solution
(don't worry, there is no visual effect, the editor does not grow up
at all, even with a value = 500)
"""
TextHelper(self.editor).mark_whole_doc_dirty()
self.editor.repaint()
s = self.editor.size()
s.setWidth(s.width() + 1)
self.editor.resizeEvent(QResizeEvent(self.editor.size(), s))
def collapse_all(self):
"""
Collapses all triggers and makes all blocks with fold level > 0
invisible.
"""
self._clear_block_deco()
block = self.editor.document().firstBlock()
last = self.editor.document().lastBlock()
while block.isValid():
lvl = TextBlockHelper.get_fold_lvl(block)
trigger = TextBlockHelper.is_fold_trigger(block)
if trigger:
if lvl == 0:
self._show_previous_blank_lines(block)
TextBlockHelper.set_collapsed(block, True)
block.setVisible(lvl == 0)
if block == last and block.text().strip() == '':
block.setVisible(True)
self._show_previous_blank_lines(block)
block = block.next()
self._refresh_editor_and_scrollbars()
tc = self.editor.textCursor()
tc.movePosition(tc.Start)
self.editor.setTextCursor(tc)
self.collapse_all_triggered.emit()
def _clear_block_deco(self):
"""Clear the folded block decorations."""
for deco in self._block_decos:
self.editor.decorations.remove(deco)
self._block_decos[:] = []
def expand_all(self):
"""Expands all fold triggers."""
block = self.editor.document().firstBlock()
while block.isValid():
TextBlockHelper.set_collapsed(block, False)
block.setVisible(True)
block = block.next()
self._clear_block_deco()
self._refresh_editor_and_scrollbars()
self.expand_all_triggered.emit()
def _on_action_toggle(self):
"""Toggle the current fold trigger."""
block = FoldScope.find_parent_scope(self.editor.textCursor().block())
self.toggle_fold_trigger(block)
def _on_action_collapse_all_triggered(self):
"""Closes all top levels fold triggers recursively."""
self.collapse_all()
def _on_action_expand_all_triggered(self):
"""
Expands all fold triggers.
:return:
"""
self.expand_all()
def _highlight_caret_scope(self):
"""
Highlight the scope of the current caret position.
This get called only if :attr:`
spyder.widgets.panels.FoldingPanel.highlight_care_scope` is True.
"""
cursor = self.editor.textCursor()
block_nbr = cursor.blockNumber()
if self._block_nbr != block_nbr:
block = FoldScope.find_parent_scope(
self.editor.textCursor().block())
try:
s = FoldScope(block)
except ValueError:
self._clear_scope_decos()
else:
self._mouse_over_line = block.blockNumber()
if TextBlockHelper.is_fold_trigger(block):
self._highlight_block(block)
self._block_nbr = block_nbr
def clone_settings(self, original):
self.native_icons = original.native_icons
self.indicators_icons = original.indicators_icons
self.highlight_caret_scope = original.highlight_caret_scope
self.custom_fold_region_background = \
original.custom_fold_region_background