mirror of
https://github.com/powerline/powerline.git
synced 2025-11-03 21:15:32 +01:00
203 lines
8.1 KiB
Python
203 lines
8.1 KiB
Python
# vim:fileencoding=utf-8:noet
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from powerline.theme import Theme
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from unicodedata import east_asian_width, combining
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import os
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try:
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NBSP = unicode(' ', 'utf-8')
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except NameError:
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NBSP = ' '
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def construct_returned_value(rendered_highlighted, segments, output_raw):
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if output_raw:
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return rendered_highlighted, ''.join((segment['_rendered_raw'] for segment in segments))
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else:
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return rendered_highlighted
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class Renderer(object):
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segment_info = {
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'environ': os.environ,
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'getcwd': getattr(os, 'getcwdu', os.getcwd),
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'home': os.environ.get('HOME'),
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}
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def __init__(self,
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theme_config,
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local_themes,
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theme_kwargs,
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colorscheme,
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pl,
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**options):
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self.__dict__.update(options)
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self.theme_config = theme_config
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theme_kwargs['pl'] = pl
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self.pl = pl
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self.theme = Theme(theme_config=theme_config, **theme_kwargs)
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self.local_themes = local_themes
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self.theme_kwargs = theme_kwargs
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self.colorscheme = colorscheme
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self.width_data = {
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'N': 1, # Neutral
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'Na': 1, # Narrow
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'A': getattr(self, 'ambiwidth', 1), # Ambigious
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'H': 1, # Half-width
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'W': 2, # Wide
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'F': 2, # Fullwidth
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}
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def strwidth(self, string):
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return sum((0 if combining(symbol) else self.width_data[east_asian_width(symbol)] for symbol in string))
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def get_theme(self, matcher_info):
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return self.theme
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def shutdown(self):
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self.theme.shutdown()
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def get_highlighting(self, segment, mode):
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segment['highlight'] = self.colorscheme.get_highlighting(segment['highlight_group'], mode, segment.get('gradient_level'))
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if segment['divider_highlight_group']:
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segment['divider_highlight'] = self.colorscheme.get_highlighting(segment['divider_highlight_group'], mode)
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else:
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segment['divider_highlight'] = None
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return segment
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def get_segment_info(self, segment_info):
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return segment_info or self.segment_info
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def render(self, mode=None, width=None, side=None, output_raw=False, segment_info=None, matcher_info=None):
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'''Render all segments.
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When a width is provided, low-priority segments are dropped one at
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a time until the line is shorter than the width, or only segments
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with a negative priority are left. If one or more filler segments are
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provided they will fill the remaining space until the desired width is
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reached.
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'''
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theme = self.get_theme(matcher_info)
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segments = theme.get_segments(side, self.get_segment_info(segment_info))
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# Handle excluded/included segments for the current mode
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segments = [self.get_highlighting(segment, mode) for segment in segments
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if mode not in segment['exclude_modes'] or (segment['include_modes'] and segment in segment['include_modes'])]
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segments = [segment for segment in self._render_segments(theme, segments)]
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if not width:
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# No width specified, so we don't need to crop or pad anything
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return construct_returned_value(''.join([segment['_rendered_hl'] for segment in segments]) + self.hlstyle(), segments, output_raw)
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# Create an ordered list of segments that can be dropped
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segments_priority = [segment for segment in sorted(segments, key=lambda segment: segment['priority'], reverse=True) if segment['priority'] > 0]
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while sum([segment['_len'] for segment in segments]) > width and len(segments_priority):
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segments.remove(segments_priority[0])
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segments_priority.pop(0)
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# Distribute the remaining space on spacer segments
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segments_spacers = [segment for segment in segments if segment['width'] == 'auto']
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if segments_spacers:
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distribute_len, distribute_len_remainder = divmod(width - sum([segment['_len'] for segment in segments]), len(segments_spacers))
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for segment in segments_spacers:
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if segment['align'] == 'l':
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segment['_space_right'] += distribute_len
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elif segment['align'] == 'r':
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segment['_space_left'] += distribute_len
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elif segment['align'] == 'c':
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space_side, space_side_remainder = divmod(distribute_len, 2)
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segment['_space_left'] += space_side + space_side_remainder
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segment['_space_right'] += space_side
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segments_spacers[0]['_space_right'] += distribute_len_remainder
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rendered_highlighted = ''.join([segment['_rendered_hl'] for segment in self._render_segments(theme, segments)]) + self.hlstyle()
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return construct_returned_value(rendered_highlighted, segments, output_raw)
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def _render_segments(self, theme, segments, render_highlighted=True):
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'''Internal segment rendering method.
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This method loops through the segment array and compares the
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foreground/background colors and divider properties and returns the
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rendered statusline as a string.
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The method always renders the raw segment contents (i.e. without
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highlighting strings added), and only renders the highlighted
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statusline if render_highlighted is True.
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'''
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segments_len = len(segments)
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for index, segment in enumerate(segments):
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segment['_rendered_raw'] = ''
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segment['_rendered_hl'] = ''
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prev_segment = segments[index - 1] if index > 0 else theme.EMPTY_SEGMENT
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next_segment = segments[index + 1] if index < segments_len - 1 else theme.EMPTY_SEGMENT
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compare_segment = next_segment if segment['side'] == 'left' else prev_segment
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outer_padding = ' ' if (index == 0 and segment['side'] == 'left') or (index == segments_len - 1 and segment['side'] == 'right') else ''
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divider_type = 'soft' if compare_segment['highlight']['bg'] == segment['highlight']['bg'] else 'hard'
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divider_raw = theme.get_divider(segment['side'], divider_type)
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divider_spaces = theme.get_spaces()
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divider_highlighted = ''
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contents_raw = segment['contents']
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contents_highlighted = ''
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# Pad segments first
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if segment['draw_divider'] or (divider_type == 'hard' and segment['width'] != 'auto'):
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if segment['side'] == 'left':
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contents_raw = outer_padding + (segment['_space_left'] * ' ') + contents_raw + ((divider_spaces + segment['_space_right']) * ' ')
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else:
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contents_raw = ((divider_spaces + segment['_space_left']) * ' ') + contents_raw + (segment['_space_right'] * ' ') + outer_padding
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else:
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if segment['side'] == 'left':
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contents_raw = outer_padding + (segment['_space_left'] * ' ') + contents_raw + (segment['_space_right'] * ' ')
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else:
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contents_raw = (segment['_space_left'] * ' ') + contents_raw + (segment['_space_right'] * ' ') + outer_padding
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# Replace spaces with no-break spaces
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contents_raw = contents_raw.replace(' ', NBSP)
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divider_raw = divider_raw.replace(' ', NBSP)
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# Apply highlighting to padded dividers and contents
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if render_highlighted:
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if divider_type == 'soft':
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divider_highlight_group_key = 'highlight' if segment['divider_highlight_group'] is None else 'divider_highlight'
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divider_fg = segment[divider_highlight_group_key]['fg']
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divider_bg = segment[divider_highlight_group_key]['bg']
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else:
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divider_fg = segment['highlight']['bg']
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divider_bg = compare_segment['highlight']['bg']
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divider_highlighted = self.hl(divider_raw, divider_fg, divider_bg, False)
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contents_highlighted = self.hl(self.escape(contents_raw), **segment['highlight'])
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# Append padded raw and highlighted segments to the rendered segment variables
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if segment['draw_divider'] or (divider_type == 'hard' and segment['width'] != 'auto'):
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if segment['side'] == 'left':
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segment['_rendered_raw'] += contents_raw + divider_raw
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segment['_rendered_hl'] += contents_highlighted + divider_highlighted
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else:
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segment['_rendered_raw'] += divider_raw + contents_raw
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segment['_rendered_hl'] += divider_highlighted + contents_highlighted
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else:
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if segment['side'] == 'left':
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segment['_rendered_raw'] += contents_raw
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segment['_rendered_hl'] += contents_highlighted
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else:
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segment['_rendered_raw'] += contents_raw
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segment['_rendered_hl'] += contents_highlighted
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segment['_len'] = self.strwidth(segment['_rendered_raw'])
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yield segment
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@staticmethod
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def escape(string):
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return string
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def hlstyle(fg=None, bg=None, attr=None):
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raise NotImplementedError
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def hl(self, contents, fg=None, bg=None, attr=None):
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return self.hlstyle(fg, bg, attr) + (contents or '')
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