Mercurial > repos > shellac > guppy_basecaller

annotate env/lib/python3.7/site-packages/click/formatting.py @ 3:758bc20232e8 draft

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
"planemo upload commit 2a0fe2cc28b09e101d37293e53e82f61762262ec"
author shellac
date Thu, 14 May 2020 16:20:52 -0400
parents 26e78fe6e8c4
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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0
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1 from contextlib import contextmanager
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2
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3 from ._compat import term_len
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4 from .parser import split_opt
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5 from .termui import get_terminal_size
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6
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7 # Can force a width. This is used by the test system
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8 FORCED_WIDTH = None
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9
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10
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11 def measure_table(rows):
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12 widths = {}
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13 for row in rows:
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14 for idx, col in enumerate(row):
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15 widths[idx] = max(widths.get(idx, 0), term_len(col))
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16 return tuple(y for x, y in sorted(widths.items()))
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17
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18
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19 def iter_rows(rows, col_count):
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20 for row in rows:
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21 row = tuple(row)
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22 yield row + ("",) * (col_count - len(row))
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23
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24
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25 def wrap_text(
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26 text, width=78, initial_indent="", subsequent_indent="", preserve_paragraphs=False
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27 ):
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28 """A helper function that intelligently wraps text. By default, it
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29 assumes that it operates on a single paragraph of text but if the
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30 `preserve_paragraphs` parameter is provided it will intelligently
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31 handle paragraphs (defined by two empty lines).
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32
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33 If paragraphs are handled, a paragraph can be prefixed with an empty
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34 line containing the ``\\b`` character (``\\x08``) to indicate that
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35 no rewrapping should happen in that block.
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36
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37 :param text: the text that should be rewrapped.
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38 :param width: the maximum width for the text.
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39 :param initial_indent: the initial indent that should be placed on the
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40 first line as a string.
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41 :param subsequent_indent: the indent string that should be placed on
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42 each consecutive line.
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43 :param preserve_paragraphs: if this flag is set then the wrapping will
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44 intelligently handle paragraphs.
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45 """
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46 from ._textwrap import TextWrapper
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47
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48 text = text.expandtabs()
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49 wrapper = TextWrapper(
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50 width,
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51 initial_indent=initial_indent,
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52 subsequent_indent=subsequent_indent,
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53 replace_whitespace=False,
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54 )
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55 if not preserve_paragraphs:
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56 return wrapper.fill(text)
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57
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58 p = []
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59 buf = []
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60 indent = None
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61
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62 def _flush_par():
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63 if not buf:
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64 return
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65 if buf[0].strip() == "\b":
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66 p.append((indent or 0, True, "\n".join(buf[1:])))
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67 else:
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68 p.append((indent or 0, False, " ".join(buf)))
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69 del buf[:]
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70
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71 for line in text.splitlines():
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72 if not line:
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73 _flush_par()
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74 indent = None
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75 else:
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76 if indent is None:
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77 orig_len = term_len(line)
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78 line = line.lstrip()
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79 indent = orig_len - term_len(line)
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80 buf.append(line)
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81 _flush_par()
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82
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83 rv = []
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84 for indent, raw, text in p:
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85 with wrapper.extra_indent(" " * indent):
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86 if raw:
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87 rv.append(wrapper.indent_only(text))
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88 else:
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89 rv.append(wrapper.fill(text))
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90
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91 return "\n\n".join(rv)
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92
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93
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94 class HelpFormatter(object):
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95 """This class helps with formatting text-based help pages. It's
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96 usually just needed for very special internal cases, but it's also
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97 exposed so that developers can write their own fancy outputs.
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98
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99 At present, it always writes into memory.
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100
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101 :param indent_increment: the additional increment for each level.
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102 :param width: the width for the text. This defaults to the terminal
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103 width clamped to a maximum of 78.
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104 """
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105
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106 def __init__(self, indent_increment=2, width=None, max_width=None):
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107 self.indent_increment = indent_increment
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108 if max_width is None:
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109 max_width = 80
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110 if width is None:
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111 width = FORCED_WIDTH
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112 if width is None:
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113 width = max(min(get_terminal_size()[0], max_width) - 2, 50)
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114 self.width = width
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115 self.current_indent = 0
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116 self.buffer = []
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117
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118 def write(self, string):
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119 """Writes a unicode string into the internal buffer."""
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120 self.buffer.append(string)
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121
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122 def indent(self):
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123 """Increases the indentation."""
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124 self.current_indent += self.indent_increment
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125
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126 def dedent(self):
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127 """Decreases the indentation."""
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128 self.current_indent -= self.indent_increment
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129
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130 def write_usage(self, prog, args="", prefix="Usage: "):
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131 """Writes a usage line into the buffer.
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132
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133 :param prog: the program name.
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134 :param args: whitespace separated list of arguments.
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135 :param prefix: the prefix for the first line.
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136 """
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137 usage_prefix = "{:>{w}}{} ".format(prefix, prog, w=self.current_indent)
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138 text_width = self.width - self.current_indent
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139
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140 if text_width >= (term_len(usage_prefix) + 20):
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141 # The arguments will fit to the right of the prefix.
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142 indent = " " * term_len(usage_prefix)
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143 self.write(
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144 wrap_text(
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145 args,
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146 text_width,
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147 initial_indent=usage_prefix,
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148 subsequent_indent=indent,
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149 )
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150 )
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151 else:
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152 # The prefix is too long, put the arguments on the next line.
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153 self.write(usage_prefix)
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154 self.write("\n")
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155 indent = " " * (max(self.current_indent, term_len(prefix)) + 4)
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156 self.write(
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157 wrap_text(
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158 args, text_width, initial_indent=indent, subsequent_indent=indent
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159 )
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160 )
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161
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162 self.write("\n")
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163
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164 def write_heading(self, heading):
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165 """Writes a heading into the buffer."""
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166 self.write("{:>{w}}{}:\n".format("", heading, w=self.current_indent))
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167
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168 def write_paragraph(self):
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169 """Writes a paragraph into the buffer."""
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170 if self.buffer:
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171 self.write("\n")
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172
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173 def write_text(self, text):
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174 """Writes re-indented text into the buffer. This rewraps and
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175 preserves paragraphs.
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176 """
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177 text_width = max(self.width - self.current_indent, 11)
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178 indent = " " * self.current_indent
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179 self.write(
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180 wrap_text(
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181 text,
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182 text_width,
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183 initial_indent=indent,
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184 subsequent_indent=indent,
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185 preserve_paragraphs=True,
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186 )
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187 )
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188 self.write("\n")
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189
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190 def write_dl(self, rows, col_max=30, col_spacing=2):
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191 """Writes a definition list into the buffer. This is how options
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192 and commands are usually formatted.
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193
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194 :param rows: a list of two item tuples for the terms and values.
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195 :param col_max: the maximum width of the first column.
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196 :param col_spacing: the number of spaces between the first and
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197 second column.
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198 """
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199 rows = list(rows)
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200 widths = measure_table(rows)
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201 if len(widths) != 2:
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202 raise TypeError("Expected two columns for definition list")
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203
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204 first_col = min(widths[0], col_max) + col_spacing
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205
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206 for first, second in iter_rows(rows, len(widths)):
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207 self.write("{:>{w}}{}".format("", first, w=self.current_indent))
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208 if not second:
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209 self.write("\n")
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210 continue
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211 if term_len(first) <= first_col - col_spacing:
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212 self.write(" " * (first_col - term_len(first)))
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213 else:
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214 self.write("\n")
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215 self.write(" " * (first_col + self.current_indent))
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216
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217 text_width = max(self.width - first_col - 2, 10)
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218 wrapped_text = wrap_text(second, text_width, preserve_paragraphs=True)
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219 lines = wrapped_text.splitlines()
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220
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221 if lines:
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222 self.write("{}\n".format(lines[0]))
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223
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224 for line in lines[1:]:
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225 self.write(
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226 "{:>{w}}{}\n".format(
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227 "", line, w=first_col + self.current_indent
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228 )
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229 )
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230
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231 if len(lines) > 1:
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232 # separate long help from next option
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233 self.write("\n")
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234 else:
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235 self.write("\n")
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236
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237 @contextmanager
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238 def section(self, name):
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239 """Helpful context manager that writes a paragraph, a heading,
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240 and the indents.
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241
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242 :param name: the section name that is written as heading.
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243 """
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244 self.write_paragraph()
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245 self.write_heading(name)
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246 self.indent()
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247 try:
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248 yield
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249 finally:
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250 self.dedent()
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251
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252 @contextmanager
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253 def indentation(self):
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254 """A context manager that increases the indentation."""
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255 self.indent()
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256 try:
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257 yield
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258 finally:
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259 self.dedent()
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260
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261 def getvalue(self):
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262 """Returns the buffer contents."""
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263 return "".join(self.buffer)
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264
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265
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266 def join_options(options):
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267 """Given a list of option strings this joins them in the most appropriate
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268 way and returns them in the form ``(formatted_string,
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269 any_prefix_is_slash)`` where the second item in the tuple is a flag that
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270 indicates if any of the option prefixes was a slash.
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271 """
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272 rv = []
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273 any_prefix_is_slash = False
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274 for opt in options:
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275 prefix = split_opt(opt)[0]
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276 if prefix == "/":
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277 any_prefix_is_slash = True
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278 rv.append((len(prefix), opt))
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279
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280 rv.sort(key=lambda x: x[0])
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281
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282 rv = ", ".join(x[1] for x in rv)
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283 return rv, any_prefix_is_slash