387 lines
15 KiB
Python
387 lines
15 KiB
Python
#!/usr/bin/env python
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# vim:fileencoding=utf-8
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# License: GPL v3 Copyright: 2018, Kovid Goyal <kovid at kovidgoyal.net>
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from gettext import gettext as _
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from itertools import repeat
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from kitty.fast_data_types import truncate_point_for_length, wcswidth
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from .collect import (
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Segment, data_for_path, highlights_for_path, lines_for_path, path_name_map,
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sanitize
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)
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from .config import formats
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from .diff_speedup import split_with_highlights as _split_with_highlights
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class Ref:
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def __setattr__(self, name, value):
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raise AttributeError("can't set attribute")
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def __repr__(self):
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return '{}({})'.format(self.__class__.__name__, ', '.join(
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'{}={}'.format(n, getattr(self, n)) for n in self.__slots__ if n != '_hash'))
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class LineRef(Ref):
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__slots__ = ('src_line_number', 'wrapped_line_idx')
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def __init__(self, sln, wli=0):
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object.__setattr__(self, 'src_line_number', sln)
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object.__setattr__(self, 'wrapped_line_idx', wli)
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class Reference(Ref):
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__slots__ = ('path', 'extra')
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def __init__(self, path, extra=None):
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object.__setattr__(self, 'path', path)
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object.__setattr__(self, 'extra', extra)
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class Line:
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__slots__ = ('text', 'ref')
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def __init__(self, text, ref):
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self.text = text
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self.ref = ref
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def yield_lines_from(iterator, reference):
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for text in iterator:
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yield Line(text, reference)
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def human_readable(size, sep=' '):
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""" Convert a size in bytes into a human readable form """
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divisor, suffix = 1, "B"
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for i, candidate in enumerate(('B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB')):
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if size < (1 << ((i + 1) * 10)):
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divisor, suffix = (1 << (i * 10)), candidate
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break
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size = str(float(size)/divisor)
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if size.find(".") > -1:
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size = size[:size.find(".")+2]
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if size.endswith('.0'):
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size = size[:-2]
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return size + sep + suffix
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def fit_in(text, count):
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p = truncate_point_for_length(text, count)
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if p >= len(text):
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return text
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if count > 1:
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p = truncate_point_for_length(text, count - 1)
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return text[:p] + '…'
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def fill_in(text, sz):
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w = wcswidth(text)
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if w < sz:
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text += ' ' * (sz - w)
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return text
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def place_in(text, sz):
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return fill_in(fit_in(text, sz), sz)
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def format_func(which):
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def formatted(text):
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fmt = formats[which]
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return '\x1b[' + fmt + 'm' + text + '\x1b[0m'
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formatted.__name__ = which + '_format'
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return formatted
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text_format = format_func('text')
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title_format = format_func('title')
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margin_format = format_func('margin')
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added_format = format_func('added')
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removed_format = format_func('removed')
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removed_margin_format = format_func('removed_margin')
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added_margin_format = format_func('added_margin')
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filler_format = format_func('filler')
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hunk_margin_format = format_func('hunk_margin')
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hunk_format = format_func('hunk')
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highlight_map = {'remove': ('removed_highlight', 'removed'), 'add': ('added_highlight', 'added')}
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def highlight_boundaries(ltype):
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s, e = highlight_map[ltype]
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start = '\x1b[' + formats[s] + 'm'
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stop = '\x1b[' + formats[e] + 'm'
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return start, stop
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def title_lines(left_path, right_path, args, columns, margin_size):
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m = ' ' * margin_size
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left_name, right_name = map(path_name_map.get, (left_path, right_path))
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if right_name and right_name != left_name:
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n1 = fit_in(m + sanitize(left_name), columns // 2 - margin_size)
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n1 = place_in(n1, columns // 2)
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n2 = fit_in(m + sanitize(right_name), columns // 2 - margin_size)
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n2 = place_in(n2, columns // 2)
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name = n1 + n2
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else:
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name = place_in(m + sanitize(left_name), columns)
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yield title_format(place_in(name, columns))
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yield title_format('━' * columns)
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def binary_lines(path, other_path, columns, margin_size):
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template = _('Binary file: {}')
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available_cols = columns // 2 - margin_size
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def fl(path, fmt):
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text = template.format(human_readable(len(data_for_path(path))))
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text = place_in(text, available_cols)
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return margin_format(' ' * margin_size) + fmt(text)
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if path is None:
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filler = render_diff_line('', '', 'filler', margin_size, available_cols)
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yield filler + fl(other_path, added_format)
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elif other_path is None:
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filler = render_diff_line('', '', 'filler', margin_size, available_cols)
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yield fl(other_path, added_format) + filler
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else:
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yield fl(path, removed_format) + fl(other_path, added_format)
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def split_to_size(line, width):
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if not line:
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yield line
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while line:
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p = truncate_point_for_length(line, width)
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yield line[:p]
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line = line[p:]
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def truncate_points(line, width):
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pos = 0
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sz = len(line)
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while True:
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pos = truncate_point_for_length(line, width, pos)
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if pos < sz:
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yield pos
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else:
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break
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def split_with_highlights(line, width, highlights, bg_highlight=None):
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truncate_pts = list(truncate_points(line, width))
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return _split_with_highlights(line, truncate_pts, highlights, bg_highlight)
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margin_bg_map = {'filler': filler_format, 'remove': removed_margin_format, 'add': added_margin_format, 'context': margin_format}
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text_bg_map = {'filler': filler_format, 'remove': removed_format, 'add': added_format, 'context': text_format}
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class DiffData:
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def __init__(self, left_path, right_path, available_cols, margin_size):
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self.left_path, self.right_path = left_path, right_path
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self.available_cols = available_cols
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self.margin_size = margin_size
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self.left_lines, self.right_lines = map(lines_for_path, (left_path, right_path))
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self.filler_line = render_diff_line('', '', 'filler', margin_size, available_cols)
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self.left_filler_line = render_diff_line('', '', 'remove', margin_size, available_cols)
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self.right_filler_line = render_diff_line('', '', 'add', margin_size, available_cols)
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self.left_hdata = highlights_for_path(left_path)
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self.right_hdata = highlights_for_path(right_path)
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def left_highlights_for_line(self, line_num):
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if line_num < len(self.left_hdata):
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return self.left_hdata[line_num]
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return []
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def right_highlights_for_line(self, line_num):
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if line_num < len(self.right_hdata):
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return self.right_hdata[line_num]
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return []
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def render_diff_line(number, text, ltype, margin_size, available_cols):
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margin = margin_bg_map[ltype](place_in(number, margin_size))
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content = text_bg_map[ltype](fill_in(text or '', available_cols))
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return margin + content
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def render_diff_pair(left_line_number, left, left_is_change, right_line_number, right, right_is_change, is_first, margin_size, available_cols):
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ltype = 'filler' if left_line_number is None else ('remove' if left_is_change else 'context')
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rtype = 'filler' if right_line_number is None else ('add' if right_is_change else 'context')
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return (
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render_diff_line(left_line_number if is_first else None, left, ltype, margin_size, available_cols) +
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render_diff_line(right_line_number if is_first else None, right, rtype, margin_size, available_cols)
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)
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def hunk_title(hunk_num, hunk, margin_size, available_cols):
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m = hunk_margin_format(' ' * margin_size)
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t = '@@ -{},{} +{},{} @@ {}'.format(hunk.left_start + 1, hunk.left_count, hunk.right_start + 1, hunk.right_count, hunk.title)
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return m + hunk_format(place_in(t, available_cols))
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def render_half_line(line_number, line, highlights, ltype, margin_size, available_cols, changed_center=None):
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bg_highlight = None
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if changed_center is not None and changed_center[0]:
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prefix_count, suffix_count = changed_center
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line_sz = len(line)
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if prefix_count + suffix_count < line_sz:
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start, stop = highlight_boundaries(ltype)
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seg = Segment(prefix_count, start)
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seg.end = line_sz - suffix_count
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seg.end_code = stop
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bg_highlight = seg
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if highlights or bg_highlight:
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lines = split_with_highlights(line, available_cols, highlights, bg_highlight)
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else:
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lines = split_to_size(line, available_cols)
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line_number = str(line_number + 1)
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for line in lines:
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yield render_diff_line(line_number, line, ltype, margin_size, available_cols)
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line_number = ''
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def lines_for_chunk(data, hunk_num, chunk, chunk_num):
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if chunk.is_context:
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for i in range(chunk.left_count):
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left_line_number = line_ref = chunk.left_start + i
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right_line_number = chunk.right_start + i
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highlights = data.left_highlights_for_line(left_line_number)
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if highlights:
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lines = split_with_highlights(data.left_lines[left_line_number], data.available_cols, highlights)
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else:
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lines = split_to_size(data.left_lines[left_line_number], data.available_cols)
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left_line_number = str(left_line_number + 1)
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right_line_number = str(right_line_number + 1)
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for wli, text in enumerate(lines):
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line = render_diff_line(left_line_number, text, 'context', data.margin_size, data.available_cols)
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if right_line_number == left_line_number:
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r = line
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else:
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r = render_diff_line(right_line_number, text, 'context', data.margin_size, data.available_cols)
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ref = Reference(data.left_path, LineRef(line_ref, wli))
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yield Line(line + r, ref)
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left_line_number = right_line_number = ''
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else:
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common = min(chunk.left_count, chunk.right_count)
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for i in range(max(chunk.left_count, chunk.right_count)):
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ll, rl = [], []
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if i < chunk.left_count:
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rln = ref_ln = chunk.left_start + i
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ll.extend(render_half_line(
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rln, data.left_lines[rln], data.left_highlights_for_line(rln),
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'remove', data.margin_size, data.available_cols,
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None if chunk.centers is None else chunk.centers[i]))
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ref_path = data.left_path
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if i < chunk.right_count:
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rln = ref_ln = chunk.right_start + i
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rl.extend(render_half_line(
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rln, data.right_lines[rln], data.right_highlights_for_line(rln),
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'add', data.margin_size, data.available_cols,
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None if chunk.centers is None else chunk.centers[i]))
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ref_path = data.right_path
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if i < common:
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extra = len(ll) - len(rl)
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if extra != 0:
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if extra < 0:
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x, fl = ll, data.left_filler_line
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extra = -extra
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else:
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x, fl = rl, data.right_filler_line
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x.extend(repeat(fl, extra))
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else:
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if ll:
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x, count = rl, len(ll)
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else:
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x, count = ll, len(rl)
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x.extend(repeat(data.filler_line, count))
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for wli, (left_line, right_line) in enumerate(zip(ll, rl)):
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ref = Reference(ref_path, LineRef(ref_ln, wli))
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yield Line(left_line + right_line, ref)
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def lines_for_diff(left_path, right_path, hunks, args, columns, margin_size):
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available_cols = columns // 2 - margin_size
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data = DiffData(left_path, right_path, available_cols, margin_size)
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for hunk_num, hunk in enumerate(hunks):
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yield Line(hunk_title(hunk_num, hunk, margin_size, columns - margin_size), Reference(left_path, LineRef(hunk.left_start)))
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for cnum, chunk in enumerate(hunk.chunks):
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yield from lines_for_chunk(data, hunk_num, chunk, cnum)
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def all_lines(path, args, columns, margin_size, is_add=True):
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available_cols = columns // 2 - margin_size
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ltype = 'add' if is_add else 'remove'
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lines = lines_for_path(path)
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filler = render_diff_line('', '', 'filler', margin_size, available_cols)
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msg_written = False
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hdata = highlights_for_path(path)
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def highlights(num):
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return hdata[num] if num < len(hdata) else []
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for line_number, line in enumerate(lines):
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h = render_half_line(line_number, line, highlights(line_number), ltype, margin_size, available_cols)
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for i, hl in enumerate(h):
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ref = Reference(path, LineRef(line_number, i))
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empty = filler
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if not msg_written:
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msg_written = True
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empty = render_diff_line(
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'', _('This file was added') if is_add else _('This file was removed'),
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'filler', margin_size, available_cols)
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text = (empty + hl) if is_add else (hl + empty)
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yield Line(text, ref)
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def rename_lines(path, other_path, args, columns, margin_size):
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m = ' ' * margin_size
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for line in split_to_size(_('The file {0} was renamed to {1}').format(
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sanitize(path_name_map[path]), sanitize(path_name_map[other_path])), columns - margin_size):
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yield m + line
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def render_diff(collection, diff_map, args, columns):
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largest_line_number = 0
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for path, item_type, other_path in collection:
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if item_type == 'diff':
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patch = diff_map.get(path)
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if patch is not None:
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largest_line_number = max(largest_line_number, patch.largest_line_number)
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margin_size = max(3, len(str(largest_line_number)) + 1)
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for path, item_type, other_path in collection:
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item_ref = Reference(path)
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is_binary = isinstance(data_for_path(path), bytes)
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yield from yield_lines_from(title_lines(path, other_path, args, columns, margin_size), item_ref)
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if item_type == 'diff':
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if is_binary:
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ans = yield_lines_from(binary_lines(path, other_path, columns, margin_size), item_ref)
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else:
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ans = lines_for_diff(path, other_path, diff_map[path], args, columns, margin_size)
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elif item_type == 'add':
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if is_binary:
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ans = yield_lines_from(binary_lines(None, path, columns, margin_size), item_ref)
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else:
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ans = all_lines(path, args, columns, margin_size, is_add=True)
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elif item_type == 'removal':
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if is_binary:
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ans = yield_lines_from(binary_lines(path, None, columns, margin_size), item_ref)
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else:
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ans = all_lines(path, args, columns, margin_size, is_add=False)
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elif item_type == 'rename':
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ans = yield_lines_from(rename_lines(path, other_path, args, columns, margin_size), item_ref)
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else:
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raise ValueError('Unsupported item type: {}'.format(item_type))
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yield from ans
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