You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
2276 lines
88 KiB
2276 lines
88 KiB
"""
|
|
Container for the layout.
|
|
(Containers can contain other containers or user interface controls.)
|
|
"""
|
|
from __future__ import unicode_literals
|
|
|
|
from abc import ABCMeta, abstractmethod
|
|
from functools import partial
|
|
from six import with_metaclass, text_type
|
|
from six.moves import range
|
|
|
|
from .controls import UIControl, FormattedTextControl, UIContent, DummyControl
|
|
from .dimension import Dimension, sum_layout_dimensions, max_layout_dimensions, to_dimension, is_dimension
|
|
from .margins import Margin
|
|
from .screen import Point, WritePosition, _CHAR_CACHE
|
|
from .utils import explode_text_fragments
|
|
|
|
from prompt_toolkit.application.current import get_app
|
|
from prompt_toolkit.cache import SimpleCache
|
|
from prompt_toolkit.filters import to_filter, vi_insert_mode, emacs_insert_mode
|
|
from prompt_toolkit.formatted_text import to_formatted_text
|
|
from prompt_toolkit.formatted_text.utils import fragment_list_to_text, fragment_list_width
|
|
from prompt_toolkit.mouse_events import MouseEvent, MouseEventType
|
|
from prompt_toolkit.utils import take_using_weights, get_cwidth, to_int, to_str
|
|
|
|
try:
|
|
from collections.abc import Sequence
|
|
except ImportError:
|
|
from collections import Sequence
|
|
|
|
__all__ = [
|
|
'Container',
|
|
'HorizontalAlign',
|
|
'VerticalAlign',
|
|
'HSplit',
|
|
'VSplit',
|
|
'FloatContainer',
|
|
'Float',
|
|
'WindowAlign',
|
|
'Window',
|
|
'WindowRenderInfo',
|
|
'ConditionalContainer',
|
|
'ScrollOffsets',
|
|
'ColorColumn',
|
|
'to_container',
|
|
'to_window',
|
|
'is_container',
|
|
'DynamicContainer',
|
|
]
|
|
|
|
|
|
class Container(with_metaclass(ABCMeta, object)):
|
|
"""
|
|
Base class for user interface layout.
|
|
"""
|
|
@abstractmethod
|
|
def reset(self):
|
|
"""
|
|
Reset the state of this container and all the children.
|
|
(E.g. reset scroll offsets, etc...)
|
|
"""
|
|
|
|
@abstractmethod
|
|
def preferred_width(self, max_available_width):
|
|
"""
|
|
Return a :class:`~prompt_toolkit.layout.Dimension` that represents the
|
|
desired width for this container.
|
|
"""
|
|
|
|
@abstractmethod
|
|
def preferred_height(self, width, max_available_height):
|
|
"""
|
|
Return a :class:`~prompt_toolkit.layout.Dimension` that represents the
|
|
desired height for this container.
|
|
"""
|
|
|
|
@abstractmethod
|
|
def write_to_screen(self, screen, mouse_handlers, write_position,
|
|
parent_style, erase_bg, z_index):
|
|
"""
|
|
Write the actual content to the screen.
|
|
|
|
:param screen: :class:`~prompt_toolkit.layout.screen.Screen`
|
|
:param mouse_handlers: :class:`~prompt_toolkit.layout.mouse_handlers.MouseHandlers`.
|
|
:param parent_style: Style string to pass to the :class:`.Window`
|
|
object. This will be applied to all content of the windows.
|
|
:class:`.VSplit` and :class:`.HSplit` can use it to pass their
|
|
style down to the windows that they contain.
|
|
:param z_index: Used for propagating z_index from parent to child.
|
|
"""
|
|
|
|
def is_modal(self):
|
|
"""
|
|
When this container is modal, key bindings from parent containers are
|
|
not taken into account if a user control in this container is focused.
|
|
"""
|
|
return False
|
|
|
|
def get_key_bindings(self):
|
|
"""
|
|
Returns a :class:`.KeyBindings` object. These bindings become active when any
|
|
user control in this container has the focus, except if any containers
|
|
between this container and the focused user control is modal.
|
|
"""
|
|
return None
|
|
|
|
@abstractmethod
|
|
def get_children(self):
|
|
"""
|
|
Return the list of child :class:`.Container` objects.
|
|
"""
|
|
return []
|
|
|
|
|
|
def _window_too_small():
|
|
" Create a `Window` that displays the 'Window too small' text. "
|
|
return Window(FormattedTextControl(text=
|
|
[('class:window-too-small', ' Window too small... ')]))
|
|
|
|
|
|
class VerticalAlign:
|
|
" Alignment for `HSplit`. "
|
|
TOP = 'TOP'
|
|
CENTER = 'CENTER'
|
|
BOTTOM = 'BOTTOM'
|
|
JUSTIFY = 'JUSTIFY'
|
|
|
|
|
|
class HorizontalAlign:
|
|
" Alignment for `VSplit`. "
|
|
LEFT = 'LEFT'
|
|
CENTER = 'CENTER'
|
|
RIGHT = 'RIGHT'
|
|
JUSTIFY = 'JUSTIFY'
|
|
|
|
|
|
class _Split(Container):
|
|
"""
|
|
The common parts of `VSplit` and `HSplit`.
|
|
"""
|
|
def __init__(self, children, window_too_small=None,
|
|
padding=Dimension.exact(0), padding_char=None,
|
|
padding_style='', width=None, height=None, z_index=None,
|
|
modal=False, key_bindings=None, style=''):
|
|
assert window_too_small is None or isinstance(window_too_small, Container)
|
|
assert isinstance(children, Sequence)
|
|
assert isinstance(modal, bool)
|
|
assert callable(style) or isinstance(style, text_type)
|
|
assert is_dimension(width)
|
|
assert is_dimension(height)
|
|
assert z_index is None or isinstance(z_index, int) # `None` means: inherit from parent.
|
|
assert is_dimension(padding)
|
|
assert padding_char is None or isinstance(padding_char, text_type)
|
|
assert isinstance(padding_style, text_type)
|
|
|
|
self.children = [to_container(c) for c in children]
|
|
self.window_too_small = window_too_small or _window_too_small()
|
|
self.padding = padding
|
|
self.padding_char = padding_char
|
|
self.padding_style = padding_style
|
|
|
|
self.width = width
|
|
self.height = height
|
|
self.z_index = z_index
|
|
|
|
self.modal = modal
|
|
self.key_bindings = key_bindings
|
|
self.style = style
|
|
|
|
def is_modal(self):
|
|
return self.modal
|
|
|
|
def get_key_bindings(self):
|
|
return self.key_bindings
|
|
|
|
def get_children(self):
|
|
return self.children
|
|
|
|
|
|
class HSplit(_Split):
|
|
"""
|
|
Several layouts, one stacked above/under the other. ::
|
|
|
|
+--------------------+
|
|
| |
|
|
+--------------------+
|
|
| |
|
|
+--------------------+
|
|
|
|
By default, this doesn't display a horizontal line between the children,
|
|
but if this is something you need, then create a HSplit as follows::
|
|
|
|
HSplit(children=[ ... ], padding_char='-',
|
|
padding=1, padding_style='#ffff00')
|
|
|
|
:param children: List of child :class:`.Container` objects.
|
|
:param window_too_small: A :class:`.Container` object that is displayed if
|
|
there is not enough space for all the children. By default, this is a
|
|
"Window too small" message.
|
|
:param align: `VerticalAlign` value.
|
|
:param width: When given, use this width instead of looking at the children.
|
|
:param height: When given, use this height instead of looking at the children.
|
|
:param z_index: (int or None) When specified, this can be used to bring
|
|
element in front of floating elements. `None` means: inherit from parent.
|
|
:param style: A style string.
|
|
:param modal: ``True`` or ``False``.
|
|
:param key_bindings: ``None`` or a :class:`.KeyBindings` object.
|
|
|
|
:param padding: (`Dimension` or int), size to be used for the padding.
|
|
:param padding_char: Character to be used for filling in the padding.
|
|
:param padding_style: Style to applied to the padding.
|
|
"""
|
|
def __init__(self, children, window_too_small=None,
|
|
align=VerticalAlign.JUSTIFY, padding=0, padding_char=None,
|
|
padding_style='', width=None, height=None, z_index=None,
|
|
modal=False, key_bindings=None, style=''):
|
|
super(HSplit, self).__init__(
|
|
children=children, window_too_small=window_too_small,
|
|
padding=padding, padding_char=padding_char,
|
|
padding_style=padding_style, width=width, height=height,
|
|
z_index=z_index, modal=modal, key_bindings=key_bindings,
|
|
style=style)
|
|
|
|
self.align = align
|
|
|
|
self._children_cache = SimpleCache(maxsize=1)
|
|
self._remaining_space_window = Window() # Dummy window.
|
|
|
|
def preferred_width(self, max_available_width):
|
|
if self.width is not None:
|
|
return to_dimension(self.width)
|
|
|
|
if self.children:
|
|
dimensions = [c.preferred_width(max_available_width)
|
|
for c in self.children]
|
|
return max_layout_dimensions(dimensions)
|
|
else:
|
|
return Dimension()
|
|
|
|
def preferred_height(self, width, max_available_height):
|
|
if self.height is not None:
|
|
return to_dimension(self.height)
|
|
|
|
dimensions = [c.preferred_height(width, max_available_height)
|
|
for c in self._all_children]
|
|
return sum_layout_dimensions(dimensions)
|
|
|
|
def reset(self):
|
|
for c in self.children:
|
|
c.reset()
|
|
|
|
@property
|
|
def _all_children(self):
|
|
"""
|
|
List of child objects, including padding.
|
|
"""
|
|
def get():
|
|
result = []
|
|
|
|
# Padding Top.
|
|
if self.align in (VerticalAlign.CENTER, VerticalAlign.BOTTOM):
|
|
result.append(Window(width=Dimension(preferred=0)))
|
|
|
|
# The children with padding.
|
|
for child in self.children:
|
|
result.append(child)
|
|
result.append(Window(
|
|
height=self.padding,
|
|
char=self.padding_char,
|
|
style=self.padding_style))
|
|
result.pop()
|
|
|
|
# Padding right.
|
|
if self.align in (VerticalAlign.CENTER, VerticalAlign.TOP):
|
|
result.append(Window(width=Dimension(preferred=0)))
|
|
|
|
return result
|
|
|
|
return self._children_cache.get(tuple(self.children), get)
|
|
|
|
def write_to_screen(self, screen, mouse_handlers, write_position,
|
|
parent_style, erase_bg, z_index):
|
|
"""
|
|
Render the prompt to a `Screen` instance.
|
|
|
|
:param screen: The :class:`~prompt_toolkit.layout.screen.Screen` class
|
|
to which the output has to be written.
|
|
"""
|
|
sizes = self._divide_heights(write_position)
|
|
style = parent_style + ' ' + to_str(self.style)
|
|
z_index = z_index if self.z_index is None else self.z_index
|
|
|
|
if sizes is None:
|
|
self.window_too_small.write_to_screen(
|
|
screen, mouse_handlers, write_position, style, erase_bg, z_index)
|
|
else:
|
|
#
|
|
ypos = write_position.ypos
|
|
xpos = write_position.xpos
|
|
width = write_position.width
|
|
|
|
# Draw child panes.
|
|
for s, c in zip(sizes, self._all_children):
|
|
c.write_to_screen(screen, mouse_handlers,
|
|
WritePosition(xpos, ypos, width, s), style,
|
|
erase_bg, z_index)
|
|
ypos += s
|
|
|
|
# Fill in the remaining space. This happens when a child control
|
|
# refuses to take more space and we don't have any padding. Adding a
|
|
# dummy child control for this (in `self._all_children`) is not
|
|
# desired, because in some situations, it would take more space, even
|
|
# when it's not required. This is required to apply the styling.
|
|
remaining_height = write_position.ypos + write_position.height - ypos
|
|
if remaining_height > 0:
|
|
self._remaining_space_window.write_to_screen(
|
|
screen, mouse_handlers,
|
|
WritePosition(xpos, ypos, width, remaining_height), style,
|
|
erase_bg, z_index)
|
|
|
|
def _divide_heights(self, write_position):
|
|
"""
|
|
Return the heights for all rows.
|
|
Or None when there is not enough space.
|
|
"""
|
|
if not self.children:
|
|
return []
|
|
|
|
width = write_position.width
|
|
height = write_position.height
|
|
|
|
# Calculate heights.
|
|
dimensions = [
|
|
c.preferred_height(width, height)
|
|
for c in self._all_children]
|
|
|
|
# Sum dimensions
|
|
sum_dimensions = sum_layout_dimensions(dimensions)
|
|
|
|
# If there is not enough space for both.
|
|
# Don't do anything.
|
|
if sum_dimensions.min > height:
|
|
return
|
|
|
|
# Find optimal sizes. (Start with minimal size, increase until we cover
|
|
# the whole height.)
|
|
sizes = [d.min for d in dimensions]
|
|
|
|
child_generator = take_using_weights(
|
|
items=list(range(len(dimensions))),
|
|
weights=[d.weight for d in dimensions])
|
|
|
|
i = next(child_generator)
|
|
|
|
# Increase until we meet at least the 'preferred' size.
|
|
preferred_stop = min(height, sum_dimensions.preferred)
|
|
preferred_dimensions = [d.preferred for d in dimensions]
|
|
|
|
while sum(sizes) < preferred_stop:
|
|
if sizes[i] < preferred_dimensions[i]:
|
|
sizes[i] += 1
|
|
i = next(child_generator)
|
|
|
|
# Increase until we use all the available space. (or until "max")
|
|
if not get_app().is_done:
|
|
max_stop = min(height, sum_dimensions.max)
|
|
max_dimensions = [d.max for d in dimensions]
|
|
|
|
while sum(sizes) < max_stop:
|
|
if sizes[i] < max_dimensions[i]:
|
|
sizes[i] += 1
|
|
i = next(child_generator)
|
|
|
|
return sizes
|
|
|
|
|
|
class VSplit(_Split):
|
|
"""
|
|
Several layouts, one stacked left/right of the other. ::
|
|
|
|
+---------+----------+
|
|
| | |
|
|
| | |
|
|
+---------+----------+
|
|
|
|
By default, this doesn't display a vertical line between the children, but
|
|
if this is something you need, then create a HSplit as follows::
|
|
|
|
VSplit(children=[ ... ], padding_char='|',
|
|
padding=1, padding_style='#ffff00')
|
|
|
|
:param children: List of child :class:`.Container` objects.
|
|
:param window_too_small: A :class:`.Container` object that is displayed if
|
|
there is not enough space for all the children. By default, this is a
|
|
"Window too small" message.
|
|
:param align: `HorizontalAlign` value.
|
|
:param width: When given, use this width instead of looking at the children.
|
|
:param height: When given, use this height instead of looking at the children.
|
|
:param z_index: (int or None) When specified, this can be used to bring
|
|
element in front of floating elements. `None` means: inherit from parent.
|
|
:param style: A style string.
|
|
:param modal: ``True`` or ``False``.
|
|
:param key_bindings: ``None`` or a :class:`.KeyBindings` object.
|
|
|
|
:param padding: (`Dimension` or int), size to be used for the padding.
|
|
:param padding_char: Character to be used for filling in the padding.
|
|
:param padding_style: Style to applied to the padding.
|
|
"""
|
|
def __init__(self, children, window_too_small=None, align=HorizontalAlign.JUSTIFY,
|
|
padding=Dimension.exact(0), padding_char=None,
|
|
padding_style='', width=None, height=None, z_index=None,
|
|
modal=False, key_bindings=None, style=''):
|
|
super(VSplit, self).__init__(
|
|
children=children, window_too_small=window_too_small,
|
|
padding=padding, padding_char=padding_char,
|
|
padding_style=padding_style, width=width, height=height,
|
|
z_index=z_index, modal=modal, key_bindings=key_bindings,
|
|
style=style)
|
|
|
|
self.align = align
|
|
|
|
self._children_cache = SimpleCache(maxsize=1)
|
|
self._remaining_space_window = Window() # Dummy window.
|
|
|
|
def preferred_width(self, max_available_width):
|
|
if self.width is not None:
|
|
return to_dimension(self.width)
|
|
|
|
dimensions = [c.preferred_width(max_available_width)
|
|
for c in self._all_children]
|
|
|
|
return sum_layout_dimensions(dimensions)
|
|
|
|
def preferred_height(self, width, max_available_height):
|
|
if self.height is not None:
|
|
return to_dimension(self.height)
|
|
|
|
# At the point where we want to calculate the heights, the widths have
|
|
# already been decided. So we can trust `width` to be the actual
|
|
# `width` that's going to be used for the rendering. So,
|
|
# `divide_widths` is supposed to use all of the available width.
|
|
# Using only the `preferred` width caused a bug where the reported
|
|
# height was more than required. (we had a `BufferControl` which did
|
|
# wrap lines because of the smaller width returned by `_divide_widths`.
|
|
|
|
sizes = self._divide_widths(width)
|
|
children = self._all_children
|
|
|
|
if sizes is None:
|
|
return Dimension()
|
|
else:
|
|
dimensions = [c.preferred_height(s, max_available_height)
|
|
for s, c in zip(sizes, children)]
|
|
return max_layout_dimensions(dimensions)
|
|
|
|
def reset(self):
|
|
for c in self.children:
|
|
c.reset()
|
|
|
|
@property
|
|
def _all_children(self):
|
|
"""
|
|
List of child objects, including padding.
|
|
"""
|
|
def get():
|
|
result = []
|
|
|
|
# Padding left.
|
|
if self.align in (HorizontalAlign.CENTER, HorizontalAlign.RIGHT):
|
|
result.append(Window(width=Dimension(preferred=0)))
|
|
|
|
# The children with padding.
|
|
for child in self.children:
|
|
result.append(child)
|
|
result.append(Window(
|
|
width=self.padding,
|
|
char=self.padding_char,
|
|
style=self.padding_style))
|
|
result.pop()
|
|
|
|
# Padding right.
|
|
if self.align in (HorizontalAlign.CENTER, HorizontalAlign.LEFT):
|
|
result.append(Window(width=Dimension(preferred=0)))
|
|
|
|
return result
|
|
|
|
return self._children_cache.get(tuple(self.children), get)
|
|
|
|
def _divide_widths(self, width):
|
|
"""
|
|
Return the widths for all columns.
|
|
Or None when there is not enough space.
|
|
"""
|
|
children = self._all_children
|
|
|
|
if not children:
|
|
return []
|
|
|
|
# Calculate widths.
|
|
dimensions = [c.preferred_width(width) for c in children]
|
|
preferred_dimensions = [d.preferred for d in dimensions]
|
|
|
|
# Sum dimensions
|
|
sum_dimensions = sum_layout_dimensions(dimensions)
|
|
|
|
# If there is not enough space for both.
|
|
# Don't do anything.
|
|
if sum_dimensions.min > width:
|
|
return
|
|
|
|
# Find optimal sizes. (Start with minimal size, increase until we cover
|
|
# the whole width.)
|
|
sizes = [d.min for d in dimensions]
|
|
|
|
child_generator = take_using_weights(
|
|
items=list(range(len(dimensions))),
|
|
weights=[d.weight for d in dimensions])
|
|
|
|
i = next(child_generator)
|
|
|
|
# Increase until we meet at least the 'preferred' size.
|
|
preferred_stop = min(width, sum_dimensions.preferred)
|
|
|
|
while sum(sizes) < preferred_stop:
|
|
if sizes[i] < preferred_dimensions[i]:
|
|
sizes[i] += 1
|
|
i = next(child_generator)
|
|
|
|
# Increase until we use all the available space.
|
|
max_dimensions = [d.max for d in dimensions]
|
|
max_stop = min(width, sum_dimensions.max)
|
|
|
|
while sum(sizes) < max_stop:
|
|
if sizes[i] < max_dimensions[i]:
|
|
sizes[i] += 1
|
|
i = next(child_generator)
|
|
|
|
return sizes
|
|
|
|
def write_to_screen(self, screen, mouse_handlers, write_position,
|
|
parent_style, erase_bg, z_index):
|
|
"""
|
|
Render the prompt to a `Screen` instance.
|
|
|
|
:param screen: The :class:`~prompt_toolkit.layout.screen.Screen` class
|
|
to which the output has to be written.
|
|
"""
|
|
if not self.children:
|
|
return
|
|
|
|
children = self._all_children
|
|
sizes = self._divide_widths(write_position.width)
|
|
style = parent_style + ' ' + to_str(self.style)
|
|
z_index = z_index if self.z_index is None else self.z_index
|
|
|
|
# If there is not enough space.
|
|
if sizes is None:
|
|
self.window_too_small.write_to_screen(
|
|
screen, mouse_handlers, write_position, style, erase_bg, z_index)
|
|
return
|
|
|
|
# Calculate heights, take the largest possible, but not larger than
|
|
# write_position.height.
|
|
heights = [child.preferred_height(width, write_position.height).preferred
|
|
for width, child in zip(sizes, children)]
|
|
height = max(write_position.height, min(write_position.height, max(heights)))
|
|
|
|
#
|
|
ypos = write_position.ypos
|
|
xpos = write_position.xpos
|
|
|
|
# Draw all child panes.
|
|
for s, c in zip(sizes, children):
|
|
c.write_to_screen(screen, mouse_handlers,
|
|
WritePosition(xpos, ypos, s, height), style,
|
|
erase_bg, z_index)
|
|
xpos += s
|
|
|
|
# Fill in the remaining space. This happens when a child control
|
|
# refuses to take more space and we don't have any padding. Adding a
|
|
# dummy child control for this (in `self._all_children`) is not
|
|
# desired, because in some situations, it would take more space, even
|
|
# when it's not required. This is required to apply the styling.
|
|
remaining_width = write_position.xpos + write_position.width - xpos
|
|
if remaining_width > 0:
|
|
self._remaining_space_window.write_to_screen(
|
|
screen, mouse_handlers,
|
|
WritePosition(xpos, ypos, remaining_width, height), style,
|
|
erase_bg, z_index)
|
|
|
|
|
|
class FloatContainer(Container):
|
|
"""
|
|
Container which can contain another container for the background, as well
|
|
as a list of floating containers on top of it.
|
|
|
|
Example Usage::
|
|
|
|
FloatContainer(content=Window(...),
|
|
floats=[
|
|
Float(xcursor=True,
|
|
ycursor=True,
|
|
layout=CompletionMenu(...))
|
|
])
|
|
|
|
:param z_index: (int or None) When specified, this can be used to bring
|
|
element in front of floating elements. `None` means: inherit from parent.
|
|
This is the z_index for the whole `Float` container as a whole.
|
|
"""
|
|
def __init__(self, content, floats, modal=False, key_bindings=None, style='', z_index=None):
|
|
assert all(isinstance(f, Float) for f in floats)
|
|
assert isinstance(modal, bool)
|
|
assert callable(style) or isinstance(style, text_type)
|
|
assert z_index is None or isinstance(z_index, int)
|
|
|
|
self.content = to_container(content)
|
|
self.floats = floats
|
|
|
|
self.modal = modal
|
|
self.key_bindings = key_bindings
|
|
self.style = style
|
|
self.z_index = z_index
|
|
|
|
def reset(self):
|
|
self.content.reset()
|
|
|
|
for f in self.floats:
|
|
f.content.reset()
|
|
|
|
def preferred_width(self, write_position):
|
|
return self.content.preferred_width(write_position)
|
|
|
|
def preferred_height(self, width, max_available_height):
|
|
"""
|
|
Return the preferred height of the float container.
|
|
(We don't care about the height of the floats, they should always fit
|
|
into the dimensions provided by the container.)
|
|
"""
|
|
return self.content.preferred_height(width, max_available_height)
|
|
|
|
def write_to_screen(self, screen, mouse_handlers, write_position,
|
|
parent_style, erase_bg, z_index):
|
|
style = parent_style + ' ' + to_str(self.style)
|
|
z_index = z_index if self.z_index is None else self.z_index
|
|
|
|
self.content.write_to_screen(
|
|
screen, mouse_handlers, write_position, style, erase_bg, z_index)
|
|
|
|
for number, fl in enumerate(self.floats):
|
|
# z_index of a Float is computed by summing the z_index of the
|
|
# container and the `Float`.
|
|
new_z_index = (z_index or 0) + fl.z_index
|
|
style = parent_style + ' ' + to_str(self.style)
|
|
|
|
# If the float that we have here, is positioned relative to the
|
|
# cursor position, but the Window that specifies the cursor
|
|
# position is not drawn yet, because it's a Float itself, we have
|
|
# to postpone this calculation. (This is a work-around, but good
|
|
# enough for now.)
|
|
postpone = (fl.xcursor is not None or fl.ycursor is not None)
|
|
|
|
if postpone:
|
|
new_z_index = number + 10 ** 8 # Draw as late as possible, but keep the order.
|
|
screen.draw_with_z_index(z_index=new_z_index, draw_func=partial(self._draw_float,
|
|
fl, screen, mouse_handlers, write_position, style, erase_bg, new_z_index))
|
|
else:
|
|
self._draw_float(fl, screen, mouse_handlers, write_position,
|
|
style, erase_bg, new_z_index)
|
|
|
|
def _draw_float(self, fl, screen, mouse_handlers, write_position,
|
|
style, erase_bg, z_index):
|
|
" Draw a single Float. "
|
|
# When a menu_position was given, use this instead of the cursor
|
|
# position. (These cursor positions are absolute, translate again
|
|
# relative to the write_position.)
|
|
# Note: This should be inside the for-loop, because one float could
|
|
# set the cursor position to be used for the next one.
|
|
cpos = screen.get_menu_position(fl.attach_to_window or get_app().layout.current_window)
|
|
cursor_position = Point(x=cpos.x - write_position.xpos,
|
|
y=cpos.y - write_position.ypos)
|
|
|
|
fl_width = fl.get_width()
|
|
fl_height = fl.get_height()
|
|
|
|
# Left & width given.
|
|
if fl.left is not None and fl_width is not None:
|
|
xpos = fl.left
|
|
width = fl_width
|
|
# Left & right given -> calculate width.
|
|
elif fl.left is not None and fl.right is not None:
|
|
xpos = fl.left
|
|
width = write_position.width - fl.left - fl.right
|
|
# Width & right given -> calculate left.
|
|
elif fl_width is not None and fl.right is not None:
|
|
xpos = write_position.width - fl.right - fl_width
|
|
width = fl_width
|
|
elif fl.xcursor:
|
|
width = fl_width
|
|
if width is None:
|
|
width = fl.content.preferred_width(write_position.width).preferred
|
|
width = min(write_position.width, width)
|
|
|
|
xpos = cursor_position.x
|
|
if xpos + width > write_position.width:
|
|
xpos = max(0, write_position.width - width)
|
|
# Only width given -> center horizontally.
|
|
elif fl_width:
|
|
xpos = int((write_position.width - fl_width) / 2)
|
|
width = fl_width
|
|
# Otherwise, take preferred width from float content.
|
|
else:
|
|
width = fl.content.preferred_width(write_position.width).preferred
|
|
|
|
if fl.left is not None:
|
|
xpos = fl.left
|
|
elif fl.right is not None:
|
|
xpos = max(0, write_position.width - width - fl.right)
|
|
else: # Center horizontally.
|
|
xpos = max(0, int((write_position.width - width) / 2))
|
|
|
|
# Trim.
|
|
width = min(width, write_position.width - xpos)
|
|
|
|
# Top & height given.
|
|
if fl.top is not None and fl_height is not None:
|
|
ypos = fl.top
|
|
height = fl_height
|
|
# Top & bottom given -> calculate height.
|
|
elif fl.top is not None and fl.bottom is not None:
|
|
ypos = fl.top
|
|
height = write_position.height - fl.top - fl.bottom
|
|
# Height & bottom given -> calculate top.
|
|
elif fl_height is not None and fl.bottom is not None:
|
|
ypos = write_position.height - fl_height - fl.bottom
|
|
height = fl_height
|
|
# Near cursor.
|
|
elif fl.ycursor:
|
|
ypos = cursor_position.y + (0 if fl.allow_cover_cursor else 1)
|
|
|
|
height = fl_height
|
|
if height is None:
|
|
height = fl.content.preferred_height(
|
|
width, write_position.height).preferred
|
|
|
|
# Reduce height if not enough space. (We can use the height
|
|
# when the content requires it.)
|
|
if height > write_position.height - ypos:
|
|
if write_position.height - ypos + 1 >= ypos:
|
|
# When the space below the cursor is more than
|
|
# the space above, just reduce the height.
|
|
height = write_position.height - ypos
|
|
else:
|
|
# Otherwise, fit the float above the cursor.
|
|
height = min(height, cursor_position.y)
|
|
ypos = cursor_position.y - height
|
|
|
|
# Only height given -> center vertically.
|
|
elif fl_width:
|
|
ypos = int((write_position.height - fl_height) / 2)
|
|
height = fl_height
|
|
# Otherwise, take preferred height from content.
|
|
else:
|
|
height = fl.content.preferred_height(
|
|
width, write_position.height).preferred
|
|
|
|
if fl.top is not None:
|
|
ypos = fl.top
|
|
elif fl.bottom is not None:
|
|
ypos = max(0, write_position.height - height - fl.bottom)
|
|
else: # Center vertically.
|
|
ypos = max(0, int((write_position.height - height) / 2))
|
|
|
|
# Trim.
|
|
height = min(height, write_position.height - ypos)
|
|
|
|
# Write float.
|
|
# (xpos and ypos can be negative: a float can be partially visible.)
|
|
if height > 0 and width > 0:
|
|
wp = WritePosition(xpos=xpos + write_position.xpos,
|
|
ypos=ypos + write_position.ypos,
|
|
width=width, height=height)
|
|
|
|
if not fl.hide_when_covering_content or self._area_is_empty(screen, wp):
|
|
fl.content.write_to_screen(
|
|
screen, mouse_handlers, wp, style,
|
|
erase_bg=not fl.transparent(), z_index=z_index)
|
|
|
|
def _area_is_empty(self, screen, write_position):
|
|
"""
|
|
Return True when the area below the write position is still empty.
|
|
(For floats that should not hide content underneath.)
|
|
"""
|
|
wp = write_position
|
|
|
|
for y in range(wp.ypos, wp.ypos + wp.height):
|
|
if y in screen.data_buffer:
|
|
row = screen.data_buffer[y]
|
|
|
|
for x in range(wp.xpos, wp.xpos + wp.width):
|
|
c = row[x]
|
|
if c.char != ' ':
|
|
return False
|
|
|
|
return True
|
|
|
|
def is_modal(self):
|
|
return self.modal
|
|
|
|
def get_key_bindings(self):
|
|
return self.key_bindings
|
|
|
|
def get_children(self):
|
|
children = [self.content]
|
|
children.extend(f.content for f in self.floats)
|
|
return children
|
|
|
|
|
|
class Float(object):
|
|
"""
|
|
Float for use in a :class:`.FloatContainer`.
|
|
Except for the `content` parameter, all other options are optional.
|
|
|
|
:param content: :class:`.Container` instance.
|
|
|
|
:param width: :class:`.Dimension` or callable which returns a :class:`.Dimension`.
|
|
:param height: :class:`.Dimension` or callable which returns a :class:`.Dimension`.
|
|
|
|
:param left: Distance to the left edge of the :class:`.FloatContainer`.
|
|
:param right: Distance to the right edge of the :class:`.FloatContainer`.
|
|
:param top: Distance to the top of the :class:`.FloatContainer`.
|
|
:param bottom: Distance to the bottom of the :class:`.FloatContainer`.
|
|
|
|
:param attach_to_window: Attach to the cursor from this window, instead of
|
|
the current window.
|
|
:param hide_when_covering_content: Hide the float when it covers content underneath.
|
|
:param allow_cover_cursor: When `False`, make sure to display the float
|
|
below the cursor. Not on top of the indicated position.
|
|
:param z_index: Z-index position. For a Float, this needs to be at least
|
|
one. It is relative to the z_index of the parent container.
|
|
:param transparent: :class:`.Filter` indicating whether this float needs to be
|
|
drawn transparently.
|
|
"""
|
|
def __init__(self, content=None, top=None, right=None, bottom=None, left=None,
|
|
width=None, height=None, xcursor=None, ycursor=None,
|
|
attach_to_window=None, hide_when_covering_content=False,
|
|
allow_cover_cursor=False, z_index=1, transparent=False):
|
|
assert is_dimension(width)
|
|
assert is_dimension(height)
|
|
assert isinstance(hide_when_covering_content, bool)
|
|
assert isinstance(allow_cover_cursor, bool)
|
|
assert isinstance(z_index, int) and z_index >= 1
|
|
|
|
self.left = left
|
|
self.right = right
|
|
self.top = top
|
|
self.bottom = bottom
|
|
|
|
self.width = width
|
|
self.height = height
|
|
|
|
self.xcursor = xcursor
|
|
self.ycursor = ycursor
|
|
|
|
if attach_to_window:
|
|
self.attach_to_window = to_window(attach_to_window)
|
|
else:
|
|
self.attach_to_window = None
|
|
|
|
self.content = to_container(content)
|
|
self.hide_when_covering_content = hide_when_covering_content
|
|
self.allow_cover_cursor = allow_cover_cursor
|
|
self.z_index = z_index
|
|
self.transparent = to_filter(transparent)
|
|
|
|
def get_width(self):
|
|
if callable(self.width):
|
|
return self.width()
|
|
return self.width
|
|
|
|
def get_height(self):
|
|
if callable(self.height):
|
|
return self.height()
|
|
return self.height
|
|
|
|
def __repr__(self):
|
|
return 'Float(content=%r)' % self.content
|
|
|
|
|
|
class WindowRenderInfo(object):
|
|
"""
|
|
Render information, for the last render time of this control.
|
|
It stores mapping information between the input buffers (in case of a
|
|
:class:`~prompt_toolkit.layout.controls.BufferControl`) and the actual
|
|
render position on the output screen.
|
|
|
|
(Could be used for implementation of the Vi 'H' and 'L' key bindings as
|
|
well as implementing mouse support.)
|
|
|
|
:param ui_content: The original :class:`.UIContent` instance that contains
|
|
the whole input, without clipping. (ui_content)
|
|
:param horizontal_scroll: The horizontal scroll of the :class:`.Window` instance.
|
|
:param vertical_scroll: The vertical scroll of the :class:`.Window` instance.
|
|
:param window_width: The width of the window that displays the content,
|
|
without the margins.
|
|
:param window_height: The height of the window that displays the content.
|
|
:param configured_scroll_offsets: The scroll offsets as configured for the
|
|
:class:`Window` instance.
|
|
:param visible_line_to_row_col: Mapping that maps the row numbers on the
|
|
displayed screen (starting from zero for the first visible line) to
|
|
(row, col) tuples pointing to the row and column of the :class:`.UIContent`.
|
|
:param rowcol_to_yx: Mapping that maps (row, column) tuples representing
|
|
coordinates of the :class:`UIContent` to (y, x) absolute coordinates at
|
|
the rendered screen.
|
|
"""
|
|
def __init__(self, window, ui_content, horizontal_scroll, vertical_scroll,
|
|
window_width, window_height,
|
|
configured_scroll_offsets,
|
|
visible_line_to_row_col, rowcol_to_yx,
|
|
x_offset, y_offset, wrap_lines):
|
|
assert isinstance(window, Window)
|
|
assert isinstance(ui_content, UIContent)
|
|
assert isinstance(horizontal_scroll, int)
|
|
assert isinstance(vertical_scroll, int)
|
|
assert isinstance(window_width, int)
|
|
assert isinstance(window_height, int)
|
|
assert isinstance(configured_scroll_offsets, ScrollOffsets)
|
|
assert isinstance(visible_line_to_row_col, dict)
|
|
assert isinstance(rowcol_to_yx, dict)
|
|
assert isinstance(x_offset, int)
|
|
assert isinstance(y_offset, int)
|
|
assert isinstance(wrap_lines, bool)
|
|
|
|
self.window = window
|
|
self.ui_content = ui_content
|
|
self.vertical_scroll = vertical_scroll
|
|
self.window_width = window_width # Width without margins.
|
|
self.window_height = window_height
|
|
|
|
self.configured_scroll_offsets = configured_scroll_offsets
|
|
self.visible_line_to_row_col = visible_line_to_row_col
|
|
self.wrap_lines = wrap_lines
|
|
|
|
self._rowcol_to_yx = rowcol_to_yx # row/col from input to absolute y/x
|
|
# screen coordinates.
|
|
self._x_offset = x_offset
|
|
self._y_offset = y_offset
|
|
|
|
@property
|
|
def visible_line_to_input_line(self):
|
|
return dict(
|
|
(visible_line, rowcol[0])
|
|
for visible_line, rowcol in self.visible_line_to_row_col.items())
|
|
|
|
@property
|
|
def cursor_position(self):
|
|
"""
|
|
Return the cursor position coordinates, relative to the left/top corner
|
|
of the rendered screen.
|
|
"""
|
|
cpos = self.ui_content.cursor_position
|
|
try:
|
|
y, x = self._rowcol_to_yx[cpos.y, cpos.x]
|
|
except KeyError:
|
|
# For `DummyControl` for instance, the content can be empty, and so
|
|
# will `_rowcol_to_yx` be. Return 0/0 by default.
|
|
return Point(x=0, y=0)
|
|
else:
|
|
return Point(x=x - self._x_offset, y=y - self._y_offset)
|
|
|
|
@property
|
|
def applied_scroll_offsets(self):
|
|
"""
|
|
Return a :class:`.ScrollOffsets` instance that indicates the actual
|
|
offset. This can be less than or equal to what's configured. E.g, when
|
|
the cursor is completely at the top, the top offset will be zero rather
|
|
than what's configured.
|
|
"""
|
|
if self.displayed_lines[0] == 0:
|
|
top = 0
|
|
else:
|
|
# Get row where the cursor is displayed.
|
|
y = self.input_line_to_visible_line[self.ui_content.cursor_position.y]
|
|
top = min(y, self.configured_scroll_offsets.top)
|
|
|
|
return ScrollOffsets(
|
|
top=top,
|
|
bottom=min(self.ui_content.line_count - self.displayed_lines[-1] - 1,
|
|
self.configured_scroll_offsets.bottom),
|
|
|
|
# For left/right, it probably doesn't make sense to return something.
|
|
# (We would have to calculate the widths of all the lines and keep
|
|
# double width characters in mind.)
|
|
left=0, right=0)
|
|
|
|
@property
|
|
def displayed_lines(self):
|
|
"""
|
|
List of all the visible rows. (Line numbers of the input buffer.)
|
|
The last line may not be entirely visible.
|
|
"""
|
|
return sorted(row for row, col in self.visible_line_to_row_col.values())
|
|
|
|
@property
|
|
def input_line_to_visible_line(self):
|
|
"""
|
|
Return the dictionary mapping the line numbers of the input buffer to
|
|
the lines of the screen. When a line spans several rows at the screen,
|
|
the first row appears in the dictionary.
|
|
"""
|
|
result = {}
|
|
for k, v in self.visible_line_to_input_line.items():
|
|
if v in result:
|
|
result[v] = min(result[v], k)
|
|
else:
|
|
result[v] = k
|
|
return result
|
|
|
|
def first_visible_line(self, after_scroll_offset=False):
|
|
"""
|
|
Return the line number (0 based) of the input document that corresponds
|
|
with the first visible line.
|
|
"""
|
|
if after_scroll_offset:
|
|
return self.displayed_lines[self.applied_scroll_offsets.top]
|
|
else:
|
|
return self.displayed_lines[0]
|
|
|
|
def last_visible_line(self, before_scroll_offset=False):
|
|
"""
|
|
Like `first_visible_line`, but for the last visible line.
|
|
"""
|
|
if before_scroll_offset:
|
|
return self.displayed_lines[-1 - self.applied_scroll_offsets.bottom]
|
|
else:
|
|
return self.displayed_lines[-1]
|
|
|
|
def center_visible_line(self, before_scroll_offset=False,
|
|
after_scroll_offset=False):
|
|
"""
|
|
Like `first_visible_line`, but for the center visible line.
|
|
"""
|
|
return (self.first_visible_line(after_scroll_offset) +
|
|
(self.last_visible_line(before_scroll_offset) -
|
|
self.first_visible_line(after_scroll_offset)) // 2)
|
|
|
|
@property
|
|
def content_height(self):
|
|
"""
|
|
The full height of the user control.
|
|
"""
|
|
return self.ui_content.line_count
|
|
|
|
@property
|
|
def full_height_visible(self):
|
|
"""
|
|
True when the full height is visible (There is no vertical scroll.)
|
|
"""
|
|
return self.vertical_scroll == 0 and self.last_visible_line() == self.content_height
|
|
|
|
@property
|
|
def top_visible(self):
|
|
"""
|
|
True when the top of the buffer is visible.
|
|
"""
|
|
return self.vertical_scroll == 0
|
|
|
|
@property
|
|
def bottom_visible(self):
|
|
"""
|
|
True when the bottom of the buffer is visible.
|
|
"""
|
|
return self.last_visible_line() == self.content_height - 1
|
|
|
|
@property
|
|
def vertical_scroll_percentage(self):
|
|
"""
|
|
Vertical scroll as a percentage. (0 means: the top is visible,
|
|
100 means: the bottom is visible.)
|
|
"""
|
|
if self.bottom_visible:
|
|
return 100
|
|
else:
|
|
return (100 * self.vertical_scroll // self.content_height)
|
|
|
|
def get_height_for_line(self, lineno):
|
|
"""
|
|
Return the height of the given line.
|
|
(The height that it would take, if this line became visible.)
|
|
"""
|
|
if self.wrap_lines:
|
|
return self.ui_content.get_height_for_line(
|
|
lineno, self.window_width, self.window.get_line_prefix)
|
|
else:
|
|
return 1
|
|
|
|
|
|
class ScrollOffsets(object):
|
|
"""
|
|
Scroll offsets for the :class:`.Window` class.
|
|
|
|
Note that left/right offsets only make sense if line wrapping is disabled.
|
|
"""
|
|
def __init__(self, top=0, bottom=0, left=0, right=0):
|
|
assert isinstance(top, int) or callable(top)
|
|
assert isinstance(bottom, int) or callable(bottom)
|
|
assert isinstance(left, int) or callable(left)
|
|
assert isinstance(right, int) or callable(right)
|
|
|
|
self._top = top
|
|
self._bottom = bottom
|
|
self._left = left
|
|
self._right = right
|
|
|
|
@property
|
|
def top(self):
|
|
return to_int(self._top)
|
|
|
|
@property
|
|
def bottom(self):
|
|
return to_int(self._bottom)
|
|
|
|
@property
|
|
def left(self):
|
|
return to_int(self._left)
|
|
|
|
@property
|
|
def right(self):
|
|
return to_int(self._right)
|
|
|
|
def __repr__(self):
|
|
return 'ScrollOffsets(top=%r, bottom=%r, left=%r, right=%r)' % (
|
|
self._top, self._bottom, self._left, self._right)
|
|
|
|
|
|
class ColorColumn(object):
|
|
" Column for a :class:`.Window` to be colored. "
|
|
def __init__(self, position, style='class:color-column'):
|
|
assert isinstance(position, int)
|
|
assert isinstance(style, text_type)
|
|
|
|
self.position = position
|
|
self.style = style
|
|
|
|
|
|
_in_insert_mode = vi_insert_mode | emacs_insert_mode
|
|
|
|
|
|
class WindowAlign:
|
|
"""
|
|
Alignment of the Window content.
|
|
|
|
Note that this is different from `HorizontalAlign` and `VerticalAlign`,
|
|
which are used for the alignment of the child containers in respectively
|
|
`VSplit` and `HSplit`.
|
|
"""
|
|
LEFT = 'LEFT'
|
|
RIGHT = 'RIGHT'
|
|
CENTER = 'CENTER'
|
|
_ALL = (LEFT, RIGHT, CENTER)
|
|
|
|
|
|
class Window(Container):
|
|
"""
|
|
Container that holds a control.
|
|
|
|
:param content: :class:`.UIControl` instance.
|
|
:param width: :class:`.Dimension` instance or callable.
|
|
:param height: :class:`.Dimension` instance or callable.
|
|
:param z_index: When specified, this can be used to bring element in front
|
|
of floating elements.
|
|
:param dont_extend_width: When `True`, don't take up more width then the
|
|
preferred width reported by the control.
|
|
:param dont_extend_height: When `True`, don't take up more width then the
|
|
preferred height reported by the control.
|
|
:param ignore_content_width: A `bool` or :class:`.Filter` instance. Ignore
|
|
the :class:`.UIContent` width when calculating the dimensions.
|
|
:param ignore_content_height: A `bool` or :class:`.Filter` instance. Ignore
|
|
the :class:`.UIContent` height when calculating the dimensions.
|
|
:param left_margins: A list of :class:`.Margin` instance to be displayed on
|
|
the left. For instance: :class:`~prompt_toolkit.layout.NumberedMargin`
|
|
can be one of them in order to show line numbers.
|
|
:param right_margins: Like `left_margins`, but on the other side.
|
|
:param scroll_offsets: :class:`.ScrollOffsets` instance, representing the
|
|
preferred amount of lines/columns to be always visible before/after the
|
|
cursor. When both top and bottom are a very high number, the cursor
|
|
will be centered vertically most of the time.
|
|
:param allow_scroll_beyond_bottom: A `bool` or
|
|
:class:`.Filter` instance. When True, allow scrolling so far, that the
|
|
top part of the content is not visible anymore, while there is still
|
|
empty space available at the bottom of the window. In the Vi editor for
|
|
instance, this is possible. You will see tildes while the top part of
|
|
the body is hidden.
|
|
:param wrap_lines: A `bool` or :class:`.Filter` instance. When True, don't
|
|
scroll horizontally, but wrap lines instead.
|
|
:param get_vertical_scroll: Callable that takes this window
|
|
instance as input and returns a preferred vertical scroll.
|
|
(When this is `None`, the scroll is only determined by the last and
|
|
current cursor position.)
|
|
:param get_horizontal_scroll: Callable that takes this window
|
|
instance as input and returns a preferred vertical scroll.
|
|
:param always_hide_cursor: A `bool` or
|
|
:class:`.Filter` instance. When True, never display the cursor, even
|
|
when the user control specifies a cursor position.
|
|
:param cursorline: A `bool` or :class:`.Filter` instance. When True,
|
|
display a cursorline.
|
|
:param cursorcolumn: A `bool` or :class:`.Filter` instance. When True,
|
|
display a cursorcolumn.
|
|
:param colorcolumns: A list of :class:`.ColorColumn` instances that
|
|
describe the columns to be highlighted, or a callable that returns such
|
|
a list.
|
|
:param align: :class:`.WindowAlign` value or callable that returns an
|
|
:class:`.WindowAlign` value. alignment of content.
|
|
:param style: A style string. Style to be applied to all the cells in this
|
|
window. (This can be a callable that returns a string.)
|
|
:param char: (string) Character to be used for filling the background. This
|
|
can also be a callable that returns a character.
|
|
:param get_line_prefix: None or a callable that returns formatted text to
|
|
be inserted before a line. It takes a line number (int) and a
|
|
wrap_count and returns formatted text. This can be used for
|
|
implementation of line continuations, things like Vim "breakindent" and
|
|
so on.
|
|
"""
|
|
def __init__(self, content=None, width=None, height=None, z_index=None,
|
|
dont_extend_width=False, dont_extend_height=False,
|
|
ignore_content_width=False, ignore_content_height=False,
|
|
left_margins=None, right_margins=None, scroll_offsets=None,
|
|
allow_scroll_beyond_bottom=False, wrap_lines=False,
|
|
get_vertical_scroll=None, get_horizontal_scroll=None, always_hide_cursor=False,
|
|
cursorline=False, cursorcolumn=False, colorcolumns=None,
|
|
align=WindowAlign.LEFT, style='', char=None, get_line_prefix=None):
|
|
assert content is None or isinstance(content, UIControl)
|
|
assert is_dimension(width)
|
|
assert is_dimension(height)
|
|
assert scroll_offsets is None or isinstance(scroll_offsets, ScrollOffsets)
|
|
assert left_margins is None or all(isinstance(m, Margin) for m in left_margins)
|
|
assert right_margins is None or all(isinstance(m, Margin) for m in right_margins)
|
|
assert get_vertical_scroll is None or callable(get_vertical_scroll)
|
|
assert get_horizontal_scroll is None or callable(get_horizontal_scroll)
|
|
assert colorcolumns is None or callable(colorcolumns) or isinstance(colorcolumns, list)
|
|
assert callable(align) or align in WindowAlign._ALL
|
|
assert callable(style) or isinstance(style, text_type)
|
|
assert char is None or callable(char) or isinstance(char, text_type)
|
|
assert z_index is None or isinstance(z_index, int)
|
|
assert get_line_prefix is None or callable(get_line_prefix)
|
|
|
|
self.allow_scroll_beyond_bottom = to_filter(allow_scroll_beyond_bottom)
|
|
self.always_hide_cursor = to_filter(always_hide_cursor)
|
|
self.wrap_lines = to_filter(wrap_lines)
|
|
self.cursorline = to_filter(cursorline)
|
|
self.cursorcolumn = to_filter(cursorcolumn)
|
|
|
|
self.content = content or DummyControl()
|
|
self.dont_extend_width = to_filter(dont_extend_width)
|
|
self.dont_extend_height = to_filter(dont_extend_height)
|
|
self.ignore_content_width = to_filter(ignore_content_width)
|
|
self.ignore_content_height = to_filter(ignore_content_height)
|
|
self.left_margins = left_margins or []
|
|
self.right_margins = right_margins or []
|
|
self.scroll_offsets = scroll_offsets or ScrollOffsets()
|
|
self.get_vertical_scroll = get_vertical_scroll
|
|
self.get_horizontal_scroll = get_horizontal_scroll
|
|
self.colorcolumns = colorcolumns or []
|
|
self.align = align
|
|
self.style = style
|
|
self.char = char
|
|
self.get_line_prefix = get_line_prefix
|
|
|
|
self.width = width
|
|
self.height = height
|
|
self.z_index = z_index
|
|
|
|
# Cache for the screens generated by the margin.
|
|
self._ui_content_cache = SimpleCache(maxsize=8)
|
|
self._margin_width_cache = SimpleCache(maxsize=1)
|
|
|
|
self.reset()
|
|
|
|
def __repr__(self):
|
|
return 'Window(content=%r)' % self.content
|
|
|
|
def reset(self):
|
|
self.content.reset()
|
|
|
|
#: Scrolling position of the main content.
|
|
self.vertical_scroll = 0
|
|
self.horizontal_scroll = 0
|
|
|
|
# Vertical scroll 2: this is the vertical offset that a line is
|
|
# scrolled if a single line (the one that contains the cursor) consumes
|
|
# all of the vertical space.
|
|
self.vertical_scroll_2 = 0
|
|
|
|
#: Keep render information (mappings between buffer input and render
|
|
#: output.)
|
|
self.render_info = None
|
|
|
|
def _get_margin_width(self, margin):
|
|
"""
|
|
Return the width for this margin.
|
|
(Calculate only once per render time.)
|
|
"""
|
|
# Margin.get_width, needs to have a UIContent instance.
|
|
def get_ui_content():
|
|
return self._get_ui_content(width=0, height=0)
|
|
|
|
def get_width():
|
|
return margin.get_width(get_ui_content)
|
|
|
|
key = (margin, get_app().render_counter)
|
|
return self._margin_width_cache.get(key, get_width)
|
|
|
|
def preferred_width(self, max_available_width):
|
|
"""
|
|
Calculate the preferred width for this window.
|
|
"""
|
|
def preferred_content_width():
|
|
""" Content width: is only calculated if no exact width for the
|
|
window was given. """
|
|
if self.ignore_content_width():
|
|
return None
|
|
|
|
# Calculate the width of the margin.
|
|
total_margin_width = sum(self._get_margin_width(m) for m in
|
|
self.left_margins + self.right_margins)
|
|
|
|
# Window of the content. (Can be `None`.)
|
|
preferred_width = self.content.preferred_width(
|
|
max_available_width - total_margin_width)
|
|
|
|
if preferred_width is not None:
|
|
# Include width of the margins.
|
|
preferred_width += total_margin_width
|
|
return preferred_width
|
|
|
|
# Merge.
|
|
return self._merge_dimensions(
|
|
dimension=to_dimension(self.width),
|
|
get_preferred=preferred_content_width,
|
|
dont_extend=self.dont_extend_width())
|
|
|
|
def preferred_height(self, width, max_available_height):
|
|
"""
|
|
Calculate the preferred height for this window.
|
|
"""
|
|
def preferred_content_height():
|
|
""" Content height: is only calculated if no exact height for the
|
|
window was given. """
|
|
if self.ignore_content_height():
|
|
return None
|
|
|
|
total_margin_width = sum(self._get_margin_width(m) for m in
|
|
self.left_margins + self.right_margins)
|
|
wrap_lines = self.wrap_lines()
|
|
|
|
return self.content.preferred_height(
|
|
width - total_margin_width, max_available_height, wrap_lines,
|
|
self.get_line_prefix)
|
|
|
|
return self._merge_dimensions(
|
|
dimension=to_dimension(self.height),
|
|
get_preferred=preferred_content_height,
|
|
dont_extend=self.dont_extend_height())
|
|
|
|
@staticmethod
|
|
def _merge_dimensions(dimension, get_preferred, dont_extend=False):
|
|
"""
|
|
Take the Dimension from this `Window` class and the received preferred
|
|
size from the `UIControl` and return a `Dimension` to report to the
|
|
parent container.
|
|
"""
|
|
dimension = dimension or Dimension()
|
|
|
|
# When a preferred dimension was explicitly given to the Window,
|
|
# ignore the UIControl.
|
|
if dimension.preferred_specified:
|
|
preferred = dimension.preferred
|
|
else:
|
|
# Otherwise, calculate the preferred dimension from the UI control
|
|
# content.
|
|
preferred = get_preferred()
|
|
|
|
# When a 'preferred' dimension is given by the UIControl, make sure
|
|
# that it stays within the bounds of the Window.
|
|
if preferred is not None:
|
|
if dimension.max_specified:
|
|
preferred = min(preferred, dimension.max)
|
|
|
|
if dimension.min_specified:
|
|
preferred = max(preferred, dimension.min)
|
|
|
|
# When a `dont_extend` flag has been given, use the preferred dimension
|
|
# also as the max dimension.
|
|
if dont_extend and preferred is not None:
|
|
max_ = min(dimension.max, preferred)
|
|
else:
|
|
max_ = (dimension.max if dimension.max_specified else None)
|
|
|
|
min_ = (dimension.min if dimension.min_specified else None)
|
|
|
|
return Dimension(
|
|
min=min_, max=max_,
|
|
preferred=preferred, weight=dimension.weight)
|
|
|
|
def _get_ui_content(self, width, height):
|
|
"""
|
|
Create a `UIContent` instance.
|
|
"""
|
|
def get_content():
|
|
return self.content.create_content(width=width, height=height)
|
|
|
|
key = (get_app().render_counter, width, height)
|
|
return self._ui_content_cache.get(key, get_content)
|
|
|
|
def _get_digraph_char(self):
|
|
" Return `False`, or the Digraph symbol to be used. "
|
|
app = get_app()
|
|
if app.quoted_insert:
|
|
return '^'
|
|
if app.vi_state.waiting_for_digraph:
|
|
if app.vi_state.digraph_symbol1:
|
|
return app.vi_state.digraph_symbol1
|
|
return '?'
|
|
return False
|
|
|
|
def write_to_screen(self, screen, mouse_handlers, write_position,
|
|
parent_style, erase_bg, z_index):
|
|
"""
|
|
Write window to screen. This renders the user control, the margins and
|
|
copies everything over to the absolute position at the given screen.
|
|
"""
|
|
z_index = z_index if self.z_index is None else self.z_index
|
|
|
|
draw_func = partial(self._write_to_screen_at_index, screen,
|
|
mouse_handlers, write_position, parent_style, erase_bg)
|
|
|
|
if z_index is None or z_index <= 0:
|
|
# When no z_index is given, draw right away.
|
|
draw_func()
|
|
else:
|
|
# Otherwise, postpone.
|
|
screen.draw_with_z_index(z_index=z_index, draw_func=draw_func)
|
|
|
|
def _write_to_screen_at_index(self, screen, mouse_handlers, write_position,
|
|
parent_style, erase_bg):
|
|
# Don't bother writing invisible windows.
|
|
# (We save some time, but also avoid applying last-line styling.)
|
|
if write_position.height <= 0 or write_position.width <= 0:
|
|
return
|
|
|
|
# Calculate margin sizes.
|
|
left_margin_widths = [self._get_margin_width(m) for m in self.left_margins]
|
|
right_margin_widths = [self._get_margin_width(m) for m in self.right_margins]
|
|
total_margin_width = sum(left_margin_widths + right_margin_widths)
|
|
|
|
# Render UserControl.
|
|
ui_content = self.content.create_content(
|
|
write_position.width - total_margin_width, write_position.height)
|
|
assert isinstance(ui_content, UIContent)
|
|
|
|
# Scroll content.
|
|
wrap_lines = self.wrap_lines()
|
|
self._scroll(ui_content, write_position.width - total_margin_width, write_position.height)
|
|
|
|
# Erase background and fill with `char`.
|
|
self._fill_bg(screen, write_position, erase_bg)
|
|
|
|
# Resolve `align` attribute.
|
|
align = self.align() if callable(self.align) else self.align
|
|
|
|
# Write body
|
|
visible_line_to_row_col, rowcol_to_yx = self._copy_body(
|
|
ui_content, screen, write_position,
|
|
sum(left_margin_widths), write_position.width - total_margin_width,
|
|
self.vertical_scroll, self.horizontal_scroll,
|
|
wrap_lines=wrap_lines, highlight_lines=True,
|
|
vertical_scroll_2=self.vertical_scroll_2,
|
|
always_hide_cursor=self.always_hide_cursor(),
|
|
has_focus=get_app().layout.current_control == self.content,
|
|
align=align, get_line_prefix=self.get_line_prefix)
|
|
|
|
# Remember render info. (Set before generating the margins. They need this.)
|
|
x_offset = write_position.xpos + sum(left_margin_widths)
|
|
y_offset = write_position.ypos
|
|
|
|
self.render_info = WindowRenderInfo(
|
|
window=self,
|
|
ui_content=ui_content,
|
|
horizontal_scroll=self.horizontal_scroll,
|
|
vertical_scroll=self.vertical_scroll,
|
|
window_width=write_position.width - total_margin_width,
|
|
window_height=write_position.height,
|
|
configured_scroll_offsets=self.scroll_offsets,
|
|
visible_line_to_row_col=visible_line_to_row_col,
|
|
rowcol_to_yx=rowcol_to_yx,
|
|
x_offset=x_offset,
|
|
y_offset=y_offset,
|
|
wrap_lines=wrap_lines)
|
|
|
|
# Set mouse handlers.
|
|
def mouse_handler(mouse_event):
|
|
""" Wrapper around the mouse_handler of the `UIControl` that turns
|
|
screen coordinates into line coordinates. """
|
|
# Don't handle mouse events outside of the current modal part of
|
|
# the UI.
|
|
if self not in get_app().layout.walk_through_modal_area():
|
|
return
|
|
|
|
# Find row/col position first.
|
|
yx_to_rowcol = dict((v, k) for k, v in rowcol_to_yx.items())
|
|
y = mouse_event.position.y
|
|
x = mouse_event.position.x
|
|
|
|
# If clicked below the content area, look for a position in the
|
|
# last line instead.
|
|
max_y = write_position.ypos + len(visible_line_to_row_col) - 1
|
|
y = min(max_y, y)
|
|
|
|
while x >= 0:
|
|
try:
|
|
row, col = yx_to_rowcol[y, x]
|
|
except KeyError:
|
|
# Try again. (When clicking on the right side of double
|
|
# width characters, or on the right side of the input.)
|
|
x -= 1
|
|
else:
|
|
# Found position, call handler of UIControl.
|
|
result = self.content.mouse_handler(
|
|
MouseEvent(position=Point(x=col, y=row),
|
|
event_type=mouse_event.event_type))
|
|
break
|
|
else:
|
|
# nobreak.
|
|
# (No x/y coordinate found for the content. This happens in
|
|
# case of a DummyControl, that does not have any content.
|
|
# Report (0,0) instead.)
|
|
result = self.content.mouse_handler(
|
|
MouseEvent(position=Point(x=0, y=0),
|
|
event_type=mouse_event.event_type))
|
|
|
|
# If it returns NotImplemented, handle it here.
|
|
if result == NotImplemented:
|
|
return self._mouse_handler(mouse_event)
|
|
|
|
return result
|
|
|
|
mouse_handlers.set_mouse_handler_for_range(
|
|
x_min=write_position.xpos + sum(left_margin_widths),
|
|
x_max=write_position.xpos + write_position.width - total_margin_width,
|
|
y_min=write_position.ypos,
|
|
y_max=write_position.ypos + write_position.height,
|
|
handler=mouse_handler)
|
|
|
|
# Render and copy margins.
|
|
move_x = 0
|
|
|
|
def render_margin(m, width):
|
|
" Render margin. Return `Screen`. "
|
|
# Retrieve margin fragments.
|
|
fragments = m.create_margin(self.render_info, width, write_position.height)
|
|
|
|
# Turn it into a UIContent object.
|
|
# already rendered those fragments using this size.)
|
|
return FormattedTextControl(fragments).create_content(
|
|
width + 1, write_position.height)
|
|
|
|
for m, width in zip(self.left_margins, left_margin_widths):
|
|
if width > 0: # (ConditionalMargin returns a zero width. -- Don't render.)
|
|
# Create screen for margin.
|
|
margin_screen = render_margin(m, width)
|
|
|
|
# Copy and shift X.
|
|
self._copy_margin(margin_screen, screen, write_position, move_x, width)
|
|
move_x += width
|
|
|
|
move_x = write_position.width - sum(right_margin_widths)
|
|
|
|
for m, width in zip(self.right_margins, right_margin_widths):
|
|
# Create screen for margin.
|
|
margin_screen = render_margin(m, width)
|
|
|
|
# Copy and shift X.
|
|
self._copy_margin(margin_screen, screen, write_position, move_x, width)
|
|
move_x += width
|
|
|
|
# Apply 'self.style'
|
|
self._apply_style(screen, write_position, parent_style)
|
|
|
|
# Tell the screen that this user control has been painted.
|
|
screen.visible_windows.append(self)
|
|
|
|
def _copy_body(self, ui_content, new_screen, write_position, move_x,
|
|
width, vertical_scroll=0, horizontal_scroll=0,
|
|
wrap_lines=False, highlight_lines=False,
|
|
vertical_scroll_2=0, always_hide_cursor=False,
|
|
has_focus=False, align=WindowAlign.LEFT, get_line_prefix=None):
|
|
"""
|
|
Copy the UIContent into the output screen.
|
|
|
|
:param get_line_prefix: None or a callable that takes a line number
|
|
(int) and a wrap_count (int) and returns formatted text.
|
|
"""
|
|
xpos = write_position.xpos + move_x
|
|
ypos = write_position.ypos
|
|
line_count = ui_content.line_count
|
|
new_buffer = new_screen.data_buffer
|
|
empty_char = _CHAR_CACHE['', '']
|
|
|
|
# Map visible line number to (row, col) of input.
|
|
# 'col' will always be zero if line wrapping is off.
|
|
visible_line_to_row_col = {}
|
|
rowcol_to_yx = {} # Maps (row, col) from the input to (y, x) screen coordinates.
|
|
|
|
def copy_line(line, lineno, x, y, is_input=False):
|
|
"""
|
|
Copy over a single line to the output screen. This can wrap over
|
|
multiple lines in the output. It will call the prefix (prompt)
|
|
function before every line.
|
|
"""
|
|
if is_input:
|
|
current_rowcol_to_yx = rowcol_to_yx
|
|
else:
|
|
current_rowcol_to_yx = {} # Throwaway dictionary.
|
|
|
|
# Draw line prefix.
|
|
if is_input and get_line_prefix:
|
|
prompt = to_formatted_text(get_line_prefix(lineno, 0))
|
|
x, y = copy_line(prompt, lineno, x, y, is_input=False)
|
|
|
|
# Scroll horizontally.
|
|
skipped = 0 # Characters skipped because of horizontal scrolling.
|
|
if horizontal_scroll and is_input:
|
|
h_scroll = horizontal_scroll
|
|
line = explode_text_fragments(line)
|
|
while h_scroll > 0 and line:
|
|
h_scroll -= get_cwidth(line[0][1])
|
|
skipped += 1
|
|
del line[:1] # Remove first character.
|
|
|
|
x -= h_scroll # When scrolling over double width character,
|
|
# this can end up being negative.
|
|
|
|
# Align this line. (Note that this doesn't work well when we use
|
|
# get_line_prefix and that function returns variable width prefixes.)
|
|
if align == WindowAlign.CENTER:
|
|
line_width = fragment_list_width(line)
|
|
if line_width < width:
|
|
x += (width - line_width) // 2
|
|
elif align == WindowAlign.RIGHT:
|
|
line_width = fragment_list_width(line)
|
|
if line_width < width:
|
|
x += width - line_width
|
|
|
|
col = 0
|
|
wrap_count = 0
|
|
for style, text in line:
|
|
new_buffer_row = new_buffer[y + ypos]
|
|
|
|
# Remember raw VT escape sequences. (E.g. FinalTerm's
|
|
# escape sequences.)
|
|
if '[ZeroWidthEscape]' in style:
|
|
new_screen.zero_width_escapes[y + ypos][x + xpos] += text
|
|
continue
|
|
|
|
for c in text:
|
|
char = _CHAR_CACHE[c, style]
|
|
char_width = char.width
|
|
|
|
# Wrap when the line width is exceeded.
|
|
if wrap_lines and x + char_width > width:
|
|
visible_line_to_row_col[y + 1] = (
|
|
lineno, visible_line_to_row_col[y][1] + x)
|
|
y += 1
|
|
wrap_count += 1
|
|
x = 0
|
|
|
|
# Insert line prefix (continuation prompt).
|
|
if is_input and get_line_prefix:
|
|
prompt = to_formatted_text(
|
|
get_line_prefix(lineno, wrap_count))
|
|
x, y = copy_line(prompt, lineno, x, y, is_input=False)
|
|
|
|
new_buffer_row = new_buffer[y + ypos]
|
|
|
|
if y >= write_position.height:
|
|
return x, y # Break out of all for loops.
|
|
|
|
# Set character in screen and shift 'x'.
|
|
if x >= 0 and y >= 0 and x < write_position.width:
|
|
new_buffer_row[x + xpos] = char
|
|
|
|
# When we print a multi width character, make sure
|
|
# to erase the neighbours positions in the screen.
|
|
# (The empty string if different from everything,
|
|
# so next redraw this cell will repaint anyway.)
|
|
if char_width > 1:
|
|
for i in range(1, char_width):
|
|
new_buffer_row[x + xpos + i] = empty_char
|
|
|
|
# If this is a zero width characters, then it's
|
|
# probably part of a decomposed unicode character.
|
|
# See: https://en.wikipedia.org/wiki/Unicode_equivalence
|
|
# Merge it in the previous cell.
|
|
elif char_width == 0:
|
|
# Handle all character widths. If the previous
|
|
# character is a multiwidth character, then
|
|
# merge it two positions back.
|
|
for pw in [2, 1]: # Previous character width.
|
|
if x - pw >= 0 and new_buffer_row[x + xpos - pw].width == pw:
|
|
prev_char = new_buffer_row[x + xpos - pw]
|
|
char2 = _CHAR_CACHE[prev_char.char + c, prev_char.style]
|
|
new_buffer_row[x + xpos - pw] = char2
|
|
|
|
# Keep track of write position for each character.
|
|
current_rowcol_to_yx[lineno, col + skipped] = (y + ypos, x + xpos)
|
|
|
|
col += 1
|
|
x += char_width
|
|
return x, y
|
|
|
|
# Copy content.
|
|
def copy():
|
|
y = - vertical_scroll_2
|
|
lineno = vertical_scroll
|
|
|
|
while y < write_position.height and lineno < line_count:
|
|
# Take the next line and copy it in the real screen.
|
|
line = ui_content.get_line(lineno)
|
|
|
|
visible_line_to_row_col[y] = (lineno, horizontal_scroll)
|
|
|
|
# Copy margin and actual line.
|
|
x = 0
|
|
x, y = copy_line(line, lineno, x, y, is_input=True)
|
|
|
|
lineno += 1
|
|
y += 1
|
|
return y
|
|
|
|
copy()
|
|
|
|
def cursor_pos_to_screen_pos(row, col):
|
|
" Translate row/col from UIContent to real Screen coordinates. "
|
|
try:
|
|
y, x = rowcol_to_yx[row, col]
|
|
except KeyError:
|
|
# Normally this should never happen. (It is a bug, if it happens.)
|
|
# But to be sure, return (0, 0)
|
|
return Point(x=0, y=0)
|
|
|
|
# raise ValueError(
|
|
# 'Invalid position. row=%r col=%r, vertical_scroll=%r, '
|
|
# 'horizontal_scroll=%r, height=%r' %
|
|
# (row, col, vertical_scroll, horizontal_scroll, write_position.height))
|
|
else:
|
|
return Point(x=x, y=y)
|
|
|
|
# Set cursor and menu positions.
|
|
if ui_content.cursor_position:
|
|
screen_cursor_position = cursor_pos_to_screen_pos(
|
|
ui_content.cursor_position.y, ui_content.cursor_position.x)
|
|
|
|
if has_focus:
|
|
new_screen.set_cursor_position(self, screen_cursor_position)
|
|
|
|
if always_hide_cursor:
|
|
new_screen.show_cursor = False
|
|
else:
|
|
new_screen.show_cursor = ui_content.show_cursor
|
|
|
|
self._highlight_digraph(new_screen)
|
|
|
|
if highlight_lines:
|
|
self._highlight_cursorlines(
|
|
new_screen, screen_cursor_position, xpos, ypos, width,
|
|
write_position.height)
|
|
|
|
# Draw input characters from the input processor queue.
|
|
if has_focus and ui_content.cursor_position:
|
|
self._show_key_processor_key_buffer(new_screen)
|
|
|
|
# Set menu position.
|
|
if ui_content.menu_position:
|
|
new_screen.set_menu_position(self, cursor_pos_to_screen_pos(
|
|
ui_content.menu_position.y, ui_content.menu_position.x))
|
|
|
|
# Update output screen height.
|
|
new_screen.height = max(new_screen.height, ypos + write_position.height)
|
|
|
|
return visible_line_to_row_col, rowcol_to_yx
|
|
|
|
def _fill_bg(self, screen, write_position, erase_bg):
|
|
"""
|
|
Erase/fill the background.
|
|
(Useful for floats and when a `char` has been given.)
|
|
"""
|
|
if callable(self.char):
|
|
char = self.char()
|
|
else:
|
|
char = self.char
|
|
|
|
if erase_bg or char:
|
|
wp = write_position
|
|
char_obj = _CHAR_CACHE[char or ' ', '']
|
|
|
|
for y in range(wp.ypos, wp.ypos + wp.height):
|
|
row = screen.data_buffer[y]
|
|
for x in range(wp.xpos, wp.xpos + wp.width):
|
|
row[x] = char_obj
|
|
|
|
def _apply_style(self, new_screen, write_position, parent_style):
|
|
# Apply `self.style`.
|
|
style = parent_style + ' ' + to_str(self.style)
|
|
|
|
new_screen.fill_area(write_position, style=style, after=False)
|
|
|
|
# Apply the 'last-line' class to the last line of each Window. This can
|
|
# be used to apply an 'underline' to the user control.
|
|
wp = WritePosition(write_position.xpos, write_position.ypos + write_position.height - 1,
|
|
write_position.width, 1)
|
|
new_screen.fill_area(wp, 'class:last-line', after=True)
|
|
|
|
def _highlight_digraph(self, new_screen):
|
|
"""
|
|
When we are in Vi digraph mode, put a question mark underneath the
|
|
cursor.
|
|
"""
|
|
digraph_char = self._get_digraph_char()
|
|
if digraph_char:
|
|
cpos = new_screen.get_cursor_position(self)
|
|
new_screen.data_buffer[cpos.y][cpos.x] = \
|
|
_CHAR_CACHE[digraph_char, 'class:digraph']
|
|
|
|
def _show_key_processor_key_buffer(self, new_screen):
|
|
"""
|
|
When the user is typing a key binding that consists of several keys,
|
|
display the last pressed key if the user is in insert mode and the key
|
|
is meaningful to be displayed.
|
|
E.g. Some people want to bind 'jj' to escape in Vi insert mode. But the
|
|
first 'j' needs to be displayed in order to get some feedback.
|
|
"""
|
|
app = get_app()
|
|
key_buffer = app.key_processor.key_buffer
|
|
|
|
if key_buffer and _in_insert_mode() and not app.is_done:
|
|
# The textual data for the given key. (Can be a VT100 escape
|
|
# sequence.)
|
|
data = key_buffer[-1].data
|
|
|
|
# Display only if this is a 1 cell width character.
|
|
if get_cwidth(data) == 1:
|
|
cpos = new_screen.get_cursor_position(self)
|
|
new_screen.data_buffer[cpos.y][cpos.x] = \
|
|
_CHAR_CACHE[data, 'class:partial-key-binding']
|
|
|
|
def _highlight_cursorlines(self, new_screen, cpos, x, y, width, height):
|
|
"""
|
|
Highlight cursor row/column.
|
|
"""
|
|
cursor_line_style = ' class:cursor-line '
|
|
cursor_column_style = ' class:cursor-column '
|
|
|
|
data_buffer = new_screen.data_buffer
|
|
|
|
# Highlight cursor line.
|
|
if self.cursorline():
|
|
row = data_buffer[cpos.y]
|
|
for x in range(x, x + width):
|
|
original_char = row[x]
|
|
row[x] = _CHAR_CACHE[
|
|
original_char.char, original_char.style + cursor_line_style]
|
|
|
|
# Highlight cursor column.
|
|
if self.cursorcolumn():
|
|
for y2 in range(y, y + height):
|
|
row = data_buffer[y2]
|
|
original_char = row[cpos.x]
|
|
row[cpos.x] = _CHAR_CACHE[
|
|
original_char.char, original_char.style + cursor_column_style]
|
|
|
|
# Highlight color columns
|
|
colorcolumns = self.colorcolumns
|
|
if callable(colorcolumns):
|
|
colorcolumns = colorcolumns()
|
|
|
|
for cc in colorcolumns:
|
|
assert isinstance(cc, ColorColumn)
|
|
column = cc.position
|
|
|
|
if column < x + width: # Only draw when visible.
|
|
color_column_style = ' ' + cc.style
|
|
|
|
for y2 in range(y, y + height):
|
|
row = data_buffer[y2]
|
|
original_char = row[column + x]
|
|
row[column + x] = _CHAR_CACHE[
|
|
original_char.char, original_char.style + color_column_style]
|
|
|
|
def _copy_margin(self, lazy_screen, new_screen, write_position, move_x, width):
|
|
"""
|
|
Copy characters from the margin screen to the real screen.
|
|
"""
|
|
xpos = write_position.xpos + move_x
|
|
ypos = write_position.ypos
|
|
|
|
margin_write_position = WritePosition(xpos, ypos, width, write_position.height)
|
|
self._copy_body(lazy_screen, new_screen, margin_write_position, 0, width)
|
|
|
|
def _scroll(self, ui_content, width, height):
|
|
"""
|
|
Scroll body. Ensure that the cursor is visible.
|
|
"""
|
|
if self.wrap_lines():
|
|
func = self._scroll_when_linewrapping
|
|
else:
|
|
func = self._scroll_without_linewrapping
|
|
|
|
func(ui_content, width, height)
|
|
|
|
def _scroll_when_linewrapping(self, ui_content, width, height):
|
|
"""
|
|
Scroll to make sure the cursor position is visible and that we maintain
|
|
the requested scroll offset.
|
|
|
|
Set `self.horizontal_scroll/vertical_scroll`.
|
|
"""
|
|
scroll_offsets_bottom = self.scroll_offsets.bottom
|
|
scroll_offsets_top = self.scroll_offsets.top
|
|
|
|
# We don't have horizontal scrolling.
|
|
self.horizontal_scroll = 0
|
|
|
|
def get_line_height(lineno):
|
|
return ui_content.get_height_for_line(lineno, width, self.get_line_prefix)
|
|
|
|
# When there is no space, reset `vertical_scroll_2` to zero and abort.
|
|
# This can happen if the margin is bigger than the window width.
|
|
# Otherwise the text height will become "infinite" (a big number) and
|
|
# the copy_line will spend a huge amount of iterations trying to render
|
|
# nothing.
|
|
if width <= 0:
|
|
self.vertical_scroll = ui_content.cursor_position.y
|
|
self.vertical_scroll_2 = 0
|
|
return
|
|
|
|
# If the current line consumes more than the whole window height,
|
|
# then we have to scroll vertically inside this line. (We don't take
|
|
# the scroll offsets into account for this.)
|
|
# Also, ignore the scroll offsets in this case. Just set the vertical
|
|
# scroll to this line.
|
|
line_height = get_line_height(ui_content.cursor_position.y)
|
|
if line_height > height - scroll_offsets_top:
|
|
# Calculate the height of the text before the cursor (including
|
|
# line prefixes).
|
|
text_before_height = ui_content.get_height_for_line(
|
|
ui_content.cursor_position.y, width, self.get_line_prefix,
|
|
slice_stop=ui_content.cursor_position.x)
|
|
|
|
# Adjust scroll offset.
|
|
self.vertical_scroll = ui_content.cursor_position.y
|
|
self.vertical_scroll_2 = min(
|
|
text_before_height - 1, # Keep the cursor visible.
|
|
line_height - height, # Avoid blank lines at the bottom when scolling up again.
|
|
self.vertical_scroll_2)
|
|
self.vertical_scroll_2 = max(0, text_before_height - height, self.vertical_scroll_2)
|
|
return
|
|
else:
|
|
self.vertical_scroll_2 = 0
|
|
|
|
# Current line doesn't consume the whole height. Take scroll offsets into account.
|
|
def get_min_vertical_scroll():
|
|
# Make sure that the cursor line is not below the bottom.
|
|
# (Calculate how many lines can be shown between the cursor and the .)
|
|
used_height = 0
|
|
prev_lineno = ui_content.cursor_position.y
|
|
|
|
for lineno in range(ui_content.cursor_position.y, -1, -1):
|
|
used_height += get_line_height(lineno)
|
|
|
|
if used_height > height - scroll_offsets_bottom:
|
|
return prev_lineno
|
|
else:
|
|
prev_lineno = lineno
|
|
return 0
|
|
|
|
def get_max_vertical_scroll():
|
|
# Make sure that the cursor line is not above the top.
|
|
prev_lineno = ui_content.cursor_position.y
|
|
used_height = 0
|
|
|
|
for lineno in range(ui_content.cursor_position.y - 1, -1, -1):
|
|
used_height += get_line_height(lineno)
|
|
|
|
if used_height > scroll_offsets_top:
|
|
return prev_lineno
|
|
else:
|
|
prev_lineno = lineno
|
|
return prev_lineno
|
|
|
|
def get_topmost_visible():
|
|
"""
|
|
Calculate the upper most line that can be visible, while the bottom
|
|
is still visible. We should not allow scroll more than this if
|
|
`allow_scroll_beyond_bottom` is false.
|
|
"""
|
|
prev_lineno = ui_content.line_count - 1
|
|
used_height = 0
|
|
for lineno in range(ui_content.line_count - 1, -1, -1):
|
|
used_height += get_line_height(lineno)
|
|
if used_height > height:
|
|
return prev_lineno
|
|
else:
|
|
prev_lineno = lineno
|
|
return prev_lineno
|
|
|
|
# Scroll vertically. (Make sure that the whole line which contains the
|
|
# cursor is visible.
|
|
topmost_visible = get_topmost_visible()
|
|
|
|
# Note: the `min(topmost_visible, ...)` is to make sure that we
|
|
# don't require scrolling up because of the bottom scroll offset,
|
|
# when we are at the end of the document.
|
|
self.vertical_scroll = max(self.vertical_scroll, min(topmost_visible, get_min_vertical_scroll()))
|
|
self.vertical_scroll = min(self.vertical_scroll, get_max_vertical_scroll())
|
|
|
|
# Disallow scrolling beyond bottom?
|
|
if not self.allow_scroll_beyond_bottom():
|
|
self.vertical_scroll = min(self.vertical_scroll, topmost_visible)
|
|
|
|
def _scroll_without_linewrapping(self, ui_content, width, height):
|
|
"""
|
|
Scroll to make sure the cursor position is visible and that we maintain
|
|
the requested scroll offset.
|
|
|
|
Set `self.horizontal_scroll/vertical_scroll`.
|
|
"""
|
|
cursor_position = ui_content.cursor_position or Point(x=0, y=0)
|
|
|
|
# Without line wrapping, we will never have to scroll vertically inside
|
|
# a single line.
|
|
self.vertical_scroll_2 = 0
|
|
|
|
if ui_content.line_count == 0:
|
|
self.vertical_scroll = 0
|
|
self.horizontal_scroll = 0
|
|
return
|
|
else:
|
|
current_line_text = fragment_list_to_text(ui_content.get_line(cursor_position.y))
|
|
|
|
def do_scroll(current_scroll, scroll_offset_start, scroll_offset_end,
|
|
cursor_pos, window_size, content_size):
|
|
" Scrolling algorithm. Used for both horizontal and vertical scrolling. "
|
|
# Calculate the scroll offset to apply.
|
|
# This can obviously never be more than have the screen size. Also, when the
|
|
# cursor appears at the top or bottom, we don't apply the offset.
|
|
scroll_offset_start = int(min(scroll_offset_start, window_size / 2, cursor_pos))
|
|
scroll_offset_end = int(min(scroll_offset_end, window_size / 2,
|
|
content_size - 1 - cursor_pos))
|
|
|
|
# Prevent negative scroll offsets.
|
|
if current_scroll < 0:
|
|
current_scroll = 0
|
|
|
|
# Scroll back if we scrolled to much and there's still space to show more of the document.
|
|
if (not self.allow_scroll_beyond_bottom() and
|
|
current_scroll > content_size - window_size):
|
|
current_scroll = max(0, content_size - window_size)
|
|
|
|
# Scroll up if cursor is before visible part.
|
|
if current_scroll > cursor_pos - scroll_offset_start:
|
|
current_scroll = max(0, cursor_pos - scroll_offset_start)
|
|
|
|
# Scroll down if cursor is after visible part.
|
|
if current_scroll < (cursor_pos + 1) - window_size + scroll_offset_end:
|
|
current_scroll = (cursor_pos + 1) - window_size + scroll_offset_end
|
|
|
|
return current_scroll
|
|
|
|
# When a preferred scroll is given, take that first into account.
|
|
if self.get_vertical_scroll:
|
|
self.vertical_scroll = self.get_vertical_scroll(self)
|
|
assert isinstance(self.vertical_scroll, int)
|
|
if self.get_horizontal_scroll:
|
|
self.horizontal_scroll = self.get_horizontal_scroll(self)
|
|
assert isinstance(self.horizontal_scroll, int)
|
|
|
|
# Update horizontal/vertical scroll to make sure that the cursor
|
|
# remains visible.
|
|
offsets = self.scroll_offsets
|
|
|
|
self.vertical_scroll = do_scroll(
|
|
current_scroll=self.vertical_scroll,
|
|
scroll_offset_start=offsets.top,
|
|
scroll_offset_end=offsets.bottom,
|
|
cursor_pos=ui_content.cursor_position.y,
|
|
window_size=height,
|
|
content_size=ui_content.line_count)
|
|
|
|
if self.get_line_prefix:
|
|
current_line_prefix_width = fragment_list_width(to_formatted_text(
|
|
self.get_line_prefix(ui_content.cursor_position.y, 0)))
|
|
else:
|
|
current_line_prefix_width = 0
|
|
|
|
self.horizontal_scroll = do_scroll(
|
|
current_scroll=self.horizontal_scroll,
|
|
scroll_offset_start=offsets.left,
|
|
scroll_offset_end=offsets.right,
|
|
cursor_pos=get_cwidth(current_line_text[:ui_content.cursor_position.x]),
|
|
window_size=width - current_line_prefix_width,
|
|
# We can only analyse the current line. Calculating the width off
|
|
# all the lines is too expensive.
|
|
content_size=max(get_cwidth(current_line_text), self.horizontal_scroll + width))
|
|
|
|
def _mouse_handler(self, mouse_event):
|
|
"""
|
|
Mouse handler. Called when the UI control doesn't handle this
|
|
particular event.
|
|
"""
|
|
if mouse_event.event_type == MouseEventType.SCROLL_DOWN:
|
|
self._scroll_down()
|
|
elif mouse_event.event_type == MouseEventType.SCROLL_UP:
|
|
self._scroll_up()
|
|
|
|
def _scroll_down(self):
|
|
" Scroll window down. "
|
|
info = self.render_info
|
|
|
|
if self.vertical_scroll < info.content_height - info.window_height:
|
|
if info.cursor_position.y <= info.configured_scroll_offsets.top:
|
|
self.content.move_cursor_down()
|
|
|
|
self.vertical_scroll += 1
|
|
|
|
def _scroll_up(self):
|
|
" Scroll window up. "
|
|
info = self.render_info
|
|
|
|
if info.vertical_scroll > 0:
|
|
# TODO: not entirely correct yet in case of line wrapping and long lines.
|
|
if info.cursor_position.y >= info.window_height - 1 - info.configured_scroll_offsets.bottom:
|
|
self.content.move_cursor_up()
|
|
|
|
self.vertical_scroll -= 1
|
|
|
|
def get_key_bindings(self):
|
|
return self.content.get_key_bindings()
|
|
|
|
def get_children(self):
|
|
return []
|
|
|
|
|
|
class ConditionalContainer(Container):
|
|
"""
|
|
Wrapper around any other container that can change the visibility. The
|
|
received `filter` determines whether the given container should be
|
|
displayed or not.
|
|
|
|
:param content: :class:`.Container` instance.
|
|
:param filter: :class:`.Filter` instance.
|
|
"""
|
|
def __init__(self, content, filter):
|
|
self.content = to_container(content)
|
|
self.filter = to_filter(filter)
|
|
|
|
def __repr__(self):
|
|
return 'ConditionalContainer(%r, filter=%r)' % (self.content, self.filter)
|
|
|
|
def reset(self):
|
|
self.content.reset()
|
|
|
|
def preferred_width(self, max_available_width):
|
|
if self.filter():
|
|
return self.content.preferred_width(max_available_width)
|
|
else:
|
|
return Dimension.zero()
|
|
|
|
def preferred_height(self, width, max_available_height):
|
|
if self.filter():
|
|
return self.content.preferred_height(width, max_available_height)
|
|
else:
|
|
return Dimension.zero()
|
|
|
|
def write_to_screen(self, screen, mouse_handlers, write_position,
|
|
parent_style, erase_bg, z_index):
|
|
if self.filter():
|
|
return self.content.write_to_screen(
|
|
screen, mouse_handlers, write_position, parent_style, erase_bg, z_index)
|
|
|
|
def get_children(self):
|
|
return [self.content]
|
|
|
|
|
|
class DynamicContainer(Container):
|
|
"""
|
|
Container class that can dynamically returns any Container.
|
|
|
|
:param get_container: Callable that returns a :class:`.Container` instance
|
|
or any widget with a ``__pt_container__`` method.
|
|
"""
|
|
def __init__(self, get_container):
|
|
assert callable(get_container)
|
|
self.get_container = get_container
|
|
|
|
def _get_container(self):
|
|
"""
|
|
Return the current container object.
|
|
|
|
We call `to_container`, because `get_container` can also return a
|
|
widget with a ``__pt_container__`` method.
|
|
"""
|
|
obj = self.get_container()
|
|
return to_container(obj)
|
|
|
|
def reset(self):
|
|
self._get_container().reset()
|
|
|
|
def preferred_width(self, max_available_width):
|
|
return self._get_container().preferred_width(max_available_width)
|
|
|
|
def preferred_height(self, width, max_available_height):
|
|
return self._get_container().preferred_height(width, max_available_height)
|
|
|
|
def write_to_screen(self, *a, **kw):
|
|
self._get_container().write_to_screen(*a, **kw)
|
|
|
|
def is_modal(self):
|
|
return False
|
|
|
|
def get_key_bindings(self):
|
|
# Key bindings will be collected when `layout.walk()` finds the child
|
|
# container.
|
|
return None
|
|
|
|
def get_children(self):
|
|
# Here we have to return the current active container itself, not its
|
|
# children. Otherwise, we run into issues where `layout.walk()` will
|
|
# never see an object of type `Window` if this contains a window. We
|
|
# can't/shouldn't proxy the "isinstance" check.
|
|
return [self._get_container()]
|
|
|
|
|
|
def to_container(container):
|
|
"""
|
|
Make sure that the given object is a :class:`.Container`.
|
|
"""
|
|
if isinstance(container, Container):
|
|
return container
|
|
elif hasattr(container, '__pt_container__'):
|
|
return to_container(container.__pt_container__())
|
|
else:
|
|
raise ValueError('Not a container object.')
|
|
|
|
|
|
def to_window(container):
|
|
"""
|
|
Make sure that the given argument is a :class:`.Window`.
|
|
"""
|
|
if isinstance(container, Window):
|
|
return container
|
|
elif hasattr(container, '__pt_container__'):
|
|
return to_window(container.__pt_container__())
|
|
else:
|
|
raise ValueError('Not a Window object: %r.' % (container, ))
|
|
|
|
|
|
def is_container(value):
|
|
"""
|
|
Checks whether the given value is a container object
|
|
(for use in assert statements).
|
|
"""
|
|
if isinstance(value, Container):
|
|
return True
|
|
if hasattr(value, '__pt_container__'):
|
|
return is_container(value.__pt_container__())
|
|
return False
|