1 | #!/usr/bin/env python2
|
2 | """
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3 | Pretty print Oils values (and later other data/languages as well).
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4 |
|
5 | Pretty printing means intelligently choosing whitespace including indentation
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6 | and newline placement, to attempt to display data nicely while staying within a
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7 | maximum line width.
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8 | """
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9 |
|
10 | # ~~~ Architecture ~~~
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11 | #
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12 | # Based on a version of the algorithm from Wadler's "A Prettier Printer".
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13 | #
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14 | # Pretty printing proceeds in two phases:
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15 | #
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16 | # 1. Convert the thing you want to print into a `doc`.
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17 | # 2. Print the `doc` using a standard algorithm.
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18 | #
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19 | # This separation keeps the details of the data you want to print separate from
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20 | # the printing algorithm.
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21 |
|
22 | # ~~~ Pretty Printing Overview ~~~
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23 | #
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24 | # If you're just using this file, you don't need to know how pretty printing
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25 | # works. Just call `PrettyPrinter().PrintValue()`. However if you want to change
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26 | # or extend how values are printed, you'll need to know, so here's an overview.
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27 | #
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28 | # You may want to first read Walder's "A Prettier Printer", which this is based
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29 | # off of:
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30 | # https://homepages.inf.ed.ac.uk/wadler/papers/prettier/prettier.pdf
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31 | #
|
32 | # Some additional reading, though only tangentially related:
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33 | #
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34 | # - https://homepages.inf.ed.ac.uk/wadler/papers/prettier/prettier.pdf
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35 | # - https://lindig.github.io/papers/strictly-pretty-2000.pdf
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36 | # - https://justinpombrio.net/2024/02/23/a-twist-on-Wadlers-printer.html
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37 | # - https://lobste.rs/s/1r0aak/twist_on_wadler_s_printer
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38 | # - https://lobste.rs/s/aevptj/why_is_prettier_rock_solid
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39 | #
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40 | # ~ Constructors ~
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41 | #
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42 | # There are just a few constructors for `doc`, from which everything else is
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43 | # built from.
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44 | #
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45 | # Text(string) prints like:
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46 | # |string
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47 | #
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48 | # Break(string) prints like:
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49 | # |string
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50 | # or like a newline:
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51 | # |
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52 | # |
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53 | # (It does the latter if printed in "flat" mode, and the former otherwise. See
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54 | # Group for details.)
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55 | #
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56 | # Concat(a, b) prints like:
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57 | # |AAAAA
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58 | # |AAABBB
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59 | # |BBBBB
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60 | #
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61 | # Indent(3, a) prints like:
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62 | # |AAAAA
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63 | # | AAAAA
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64 | # | AAAAA
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65 | #
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66 | # Group(a) makes a decision. It either:
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67 | # - Prints `a` "flat", meaning that (i) every Break inside of it is printed as a
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68 | # string instead of as a newline, and (ii) every Group nested inside of it is
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69 | # printed flat.
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70 | # - Prints `a` normally, meaning that (i) the Breaks inside of it are printed as
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71 | # newlines, and (ii) the Groups inside of it make their own decision about
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72 | # whether to be flat.
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73 | # It makes this decision greedily. If the current line would not overflow if the
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74 | # group printed flat, then it will print flat. This takes into account not only
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75 | # the group itself, but the content before and after it on the same line.
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76 | #
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77 | # IfFlat(a, b) prints a if in flat mode or b otherwise.
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78 | #
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79 | # Flat(a) prints a in flat mode. You should generally not need to use it.
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80 | #
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81 | # ~ Measures ~
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82 | #
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83 | # The algorithm used here is close to the one originally described by Wadler,
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84 | # but it precomputes a "measure" for each node in the `doc`. This "measure"
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85 | # allows each Groups to decide whether to print flat or not without needing to
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86 | # look ahead per Wadler's algorithm. A measure has two pieces of information:
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87 | #
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88 | # - Measure.flat is the width of the doc if it's printed flat.
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89 | # - Measure.nonflat is the width of the doc until the _earliest possible_
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90 | # newline, or -1 if it doesn't contain a Break.
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91 | #
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92 | # Measures are used in two steps. First, they're computed bottom-up on the
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93 | # `doc`, measuring the size of each node. Later, _PrintDoc() stores a measure in
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94 | # each DocFragment. These Measures measure something different: the width from
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95 | # the doc _to the end of the entire doc tree_. This second set of Measures (the
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96 | # ones in the DocFragments) are computed top-down, and they're used to decide
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97 | # for each Group whether to use flat mode or not, without needing to scan ahead.
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98 |
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99 | from __future__ import print_function
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100 |
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101 | import math
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102 |
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103 | from _devbuild.gen.pretty_asdl import doc, doc_e, DocFragment, Measure, MeasuredDoc
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104 | from _devbuild.gen.value_asdl import value, value_e, value_t, value_str
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105 | from data_lang import j8
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106 | from data_lang import j8_lite
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107 | from core import ansi
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108 | from frontend import match
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109 | from mycpp import mops
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110 | from mycpp.mylib import log, tagswitch, BufWriter, iteritems
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111 | from typing import cast, List, Dict
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112 | import libc
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113 |
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114 | _ = log
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115 |
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116 |
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117 | def ValType(val):
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118 | # type: (value_t) -> str
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119 | """Returns a user-facing string like Int, Eggex, BashArray, etc."""
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120 | return value_str(val.tag(), dot=False)
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121 |
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122 |
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123 | def _FloatString(fl):
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124 | # type: (float) -> str
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125 |
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126 | # Print in YSH syntax, similar to data_lang/j8.py
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127 | if math.isinf(fl):
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128 | s = 'INFINITY'
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129 | if fl < 0:
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130 | s = '-' + s
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131 | elif math.isnan(fl):
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132 | s = 'NAN'
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133 | else:
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134 | s = str(fl)
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135 | return s
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136 |
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137 |
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138 | ################
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139 | # Measurements #
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140 | ################
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141 |
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142 |
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143 | def TryUnicodeWidth(s):
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144 | # type: (str) -> int
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145 | try:
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146 | width = libc.wcswidth(s)
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147 | except UnicodeError:
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148 | # e.g. en_US.UTF-8 locale missing, just return the number of bytes
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149 | width = len(s)
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150 |
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151 | if width == -1: # non-printable wide char
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152 | return len(s)
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153 |
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154 | return width
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155 |
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156 |
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157 | def _EmptyMeasure():
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158 | # type: () -> Measure
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159 | """The measure of an empty doc."""
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160 | return Measure(0, -1)
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161 |
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162 |
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163 | def _FlattenMeasure(measure):
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164 | # type: (Measure) -> Measure
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165 | """The measure if its document is rendered flat."""
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166 | return Measure(measure.flat, -1)
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167 |
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168 |
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169 | def _ConcatMeasure(m1, m2):
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170 | # type: (Measure, Measure) -> Measure
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171 | """Compute the measure of concatenated docs.
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172 |
|
173 | If m1 and m2 are the measures of doc1 and doc2,
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174 | then _ConcatMeasure(m1, m2) is the measure of doc.Concat([doc1, doc2]).
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175 | This concatenation is associative but not commutative."""
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176 | if m1.nonflat != -1:
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177 | return Measure(m1.flat + m2.flat, m1.nonflat)
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178 | elif m2.nonflat != -1:
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179 | return Measure(m1.flat + m2.flat, m1.flat + m2.nonflat)
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180 | else:
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181 | return Measure(m1.flat + m2.flat, -1)
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182 |
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183 |
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184 | def _SuffixLen(measure):
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185 | # type: (Measure) -> int
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186 | """The width until the earliest possible newline, or end of document."""
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187 | if measure.nonflat != -1:
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188 | return measure.nonflat
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189 | else:
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190 | return measure.flat
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191 |
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192 |
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193 | ####################
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194 | # Doc Construction #
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195 | ####################
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196 |
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197 |
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198 | def _Text(string):
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199 | # type: (str) -> MeasuredDoc
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200 | """Print `string` (which must not contain a newline)."""
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201 | return MeasuredDoc(doc.Text(string), Measure(TryUnicodeWidth(string), -1))
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202 |
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203 |
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204 | def _Break(string):
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205 | # type: (str) -> MeasuredDoc
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206 | """If in `flat` mode, print `string`, otherwise print `\n`."""
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207 | return MeasuredDoc(doc.Break(string), Measure(TryUnicodeWidth(string), 0))
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208 |
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209 |
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210 | def _Indent(indent, mdoc):
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211 | # type: (int, MeasuredDoc) -> MeasuredDoc
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212 | """Add `indent` spaces after every newline in `mdoc`."""
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213 | return MeasuredDoc(doc.Indent(indent, mdoc), mdoc.measure)
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214 |
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215 |
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216 | def _Concat(mdocs):
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217 | # type: (List[MeasuredDoc]) -> MeasuredDoc
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218 | """Print the mdocs in order (with no space in between)."""
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219 | measure = _EmptyMeasure()
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220 | for mdoc in mdocs:
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221 | measure = _ConcatMeasure(measure, mdoc.measure)
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222 | return MeasuredDoc(doc.Concat(mdocs), measure)
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223 |
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224 |
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225 | def _Group(mdoc):
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226 | # type: (MeasuredDoc) -> MeasuredDoc
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227 | """Print `mdoc`. Use flat mode if `mdoc` will fit on the current line."""
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228 | return MeasuredDoc(doc.Group(mdoc), mdoc.measure)
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229 |
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230 |
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231 | def _IfFlat(flat_mdoc, nonflat_mdoc):
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232 | # type: (MeasuredDoc, MeasuredDoc) -> MeasuredDoc
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233 | """If in flat mode, print `flat_mdoc` otherwise print `nonflat_mdoc`."""
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234 | return MeasuredDoc(
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235 | doc.IfFlat(flat_mdoc, nonflat_mdoc),
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236 | Measure(flat_mdoc.measure.flat, nonflat_mdoc.measure.nonflat))
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237 |
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238 |
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239 | def _Flat(mdoc):
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240 | # type: (MeasuredDoc) -> MeasuredDoc
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241 | """Prints `mdoc` in flat mode."""
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242 | return MeasuredDoc(doc.Flat(mdoc), _FlattenMeasure(mdoc.measure))
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243 |
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244 |
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245 | ###################
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246 | # Pretty Printing #
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247 | ###################
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248 |
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249 | _DEFAULT_MAX_WIDTH = 80
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250 | _DEFAULT_INDENTATION = 4
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251 | _DEFAULT_USE_STYLES = True
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252 | _DEFAULT_SHOW_TYPE_PREFIX = True
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253 |
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254 | # Tuned for 'data_lang/pretty-benchmark.sh float-demo'
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255 | # TODO: might want options for float width
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256 | _DEFAULT_MAX_TABULAR_WIDTH = 22
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257 |
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258 |
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259 | class PrettyPrinter(object):
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260 | """Pretty print an Oils value."""
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261 |
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262 | def __init__(self):
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263 | # type: () -> None
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264 | """Construct a PrettyPrinter with default configuration options.
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265 |
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266 | Use the Set*() methods for configuration before printing."""
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267 | self.max_width = _DEFAULT_MAX_WIDTH
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268 | self.indent = _DEFAULT_INDENTATION
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269 | self.use_styles = _DEFAULT_USE_STYLES
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270 | self.show_type_prefix = _DEFAULT_SHOW_TYPE_PREFIX
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271 | self.max_tabular_width = _DEFAULT_MAX_TABULAR_WIDTH
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272 | self.ysh_style = False
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273 |
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274 | def SetMaxWidth(self, max_width):
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275 | # type: (int) -> None
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276 | """Set the maximum line width.
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277 |
|
278 | Pretty printing will attempt to (but does not guarantee to) fit the doc
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279 | within this width.
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280 | """
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281 | self.max_width = max_width
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282 |
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283 | def SetIndent(self, indent):
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284 | # type: (int) -> None
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285 | """Set the number of spaces per indent."""
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286 | self.indent = indent
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287 |
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288 | def SetUseStyles(self, use_styles):
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289 | # type: (bool) -> None
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290 | """Print with ansi colors and styles, rather than plain text."""
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291 | self.use_styles = use_styles
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292 |
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293 | def SetShowTypePrefix(self, show_type_prefix):
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294 | # type: (bool) -> None
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295 | """Set whether or not to print a type before the top-level value.
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296 |
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297 | E.g. `(Bool) true`"""
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298 | self.show_type_prefix = show_type_prefix
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299 |
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300 | def SetMaxTabularWidth(self, max_tabular_width):
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301 | # type: (int) -> None
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302 | """Set the maximum width that list elements can be, for them to be
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303 | vertically aligned."""
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304 | self.max_tabular_width = max_tabular_width
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305 |
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306 | def SetYshStyle(self):
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307 | # type: () -> None
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308 | self.ysh_style = True
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309 |
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310 | def PrintValue(self, val, buf):
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311 | # type: (value_t, BufWriter) -> None
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312 | """Pretty print an Oils value to a BufWriter."""
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313 | constructor = _DocConstructor(self.indent, self.use_styles,
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314 | self.show_type_prefix,
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315 | self.max_tabular_width, self.ysh_style)
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316 | document = constructor.Value(val)
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317 | self._PrintDoc(document, buf)
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318 |
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319 | def _Fits(self, prefix_len, group, suffix_measure):
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320 | # type: (int, doc.Group, Measure) -> bool
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321 | """Will `group` fit flat on the current line?"""
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322 | measure = _ConcatMeasure(_FlattenMeasure(group.mdoc.measure),
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323 | suffix_measure)
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324 | return prefix_len + _SuffixLen(measure) <= self.max_width
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325 |
|
326 | def _PrintDoc(self, document, buf):
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327 | # type: (MeasuredDoc, BufWriter) -> None
|
328 | """Pretty print a `pretty.doc` to a BufWriter."""
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329 |
|
330 | # The width of the text we've printed so far on the current line
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331 | prefix_len = 0
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332 | # A _stack_ of document fragments to print. Each fragment contains:
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333 | # - A MeasuredDoc (doc node and its measure, saying how "big" it is)
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334 | # - The indentation level to print this doc node at.
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335 | # - Is this doc node being printed in flat mode?
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336 | # - The measure _from just after the doc node, to the end of the entire document_.
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337 | # (Call this the suffix_measure)
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338 | fragments = [DocFragment(_Group(document), 0, False, _EmptyMeasure())]
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339 |
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340 | while len(fragments) > 0:
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341 | frag = fragments.pop()
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342 | with tagswitch(frag.mdoc.doc) as case:
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343 |
|
344 | if case(doc_e.Text):
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345 | text = cast(doc.Text, frag.mdoc.doc)
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346 | buf.write(text.string)
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347 | prefix_len += frag.mdoc.measure.flat
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348 |
|
349 | elif case(doc_e.Break):
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350 | if frag.is_flat:
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351 | break_str = cast(doc.Break, frag.mdoc.doc).string
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352 | buf.write(break_str)
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353 | prefix_len += frag.mdoc.measure.flat
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354 | else:
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355 | buf.write('\n')
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356 | buf.write_spaces(frag.indent)
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357 | prefix_len = frag.indent
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358 |
|
359 | elif case(doc_e.Indent):
|
360 | indented = cast(doc.Indent, frag.mdoc.doc)
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361 | fragments.append(
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362 | DocFragment(indented.mdoc,
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363 | frag.indent + indented.indent,
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364 | frag.is_flat, frag.measure))
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365 |
|
366 | elif case(doc_e.Concat):
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367 | # If we encounter Concat([A, B, C]) with a suffix measure M,
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368 | # we need to push A,B,C onto the stack in reverse order:
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369 | # - C, with suffix_measure = B.measure + A.measure + M
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370 | # - B, with suffix_measure = A.measure + M
|
371 | # - A, with suffix_measure = M
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372 | concat = cast(doc.Concat, frag.mdoc.doc)
|
373 | measure = frag.measure
|
374 | for mdoc in reversed(concat.mdocs):
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375 | fragments.append(
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376 | DocFragment(mdoc, frag.indent, frag.is_flat,
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377 | measure))
|
378 | measure = _ConcatMeasure(mdoc.measure, measure)
|
379 |
|
380 | elif case(doc_e.Group):
|
381 | # If the group would fit on the current line when printed
|
382 | # flat, do so. Otherwise, print it non-flat.
|
383 | group = cast(doc.Group, frag.mdoc.doc)
|
384 | flat = self._Fits(prefix_len, group, frag.measure)
|
385 | fragments.append(
|
386 | DocFragment(group.mdoc, frag.indent, flat,
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387 | frag.measure))
|
388 |
|
389 | elif case(doc_e.IfFlat):
|
390 | if_flat = cast(doc.IfFlat, frag.mdoc.doc)
|
391 | if frag.is_flat:
|
392 | subdoc = if_flat.flat_mdoc
|
393 | else:
|
394 | subdoc = if_flat.nonflat_mdoc
|
395 | fragments.append(
|
396 | DocFragment(subdoc, frag.indent, frag.is_flat,
|
397 | frag.measure))
|
398 |
|
399 | elif case(doc_e.Flat):
|
400 | flat_doc = cast(doc.Flat, frag.mdoc.doc)
|
401 | fragments.append(
|
402 | DocFragment(flat_doc.mdoc, frag.indent, True,
|
403 | frag.measure))
|
404 |
|
405 |
|
406 | ################
|
407 | # Value -> Doc #
|
408 | ################
|
409 |
|
410 |
|
411 | class _DocConstructor:
|
412 | """Converts Oil values into `doc`s, which can then be pretty printed."""
|
413 |
|
414 | def __init__(self, indent, use_styles, show_type_prefix, max_tabular_width,
|
415 | ysh_style):
|
416 | # type: (int, bool, bool, int, bool) -> None
|
417 | self.indent = indent
|
418 | self.use_styles = use_styles
|
419 | self.show_type_prefix = show_type_prefix
|
420 | self.max_tabular_width = max_tabular_width
|
421 | self.ysh_style = ysh_style
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422 |
|
423 | self.visiting = {} # type: Dict[int, bool]
|
424 |
|
425 | # These can be configurable later
|
426 | self.number_style = ansi.YELLOW
|
427 | self.null_style = ansi.BOLD + ansi.RED
|
428 | self.bool_style = ansi.BOLD + ansi.BLUE
|
429 | self.string_style = ansi.GREEN
|
430 | self.cycle_style = ansi.BOLD + ansi.MAGENTA
|
431 | self.type_style = ansi.CYAN
|
432 |
|
433 | def Value(self, val):
|
434 | # type: (value_t) -> MeasuredDoc
|
435 | """Convert an Oils value into a `doc`, which can then be pretty printed."""
|
436 | self.visiting.clear()
|
437 | if self.show_type_prefix:
|
438 | # These JSON-like types have a special notation, so print type
|
439 | # explicitly
|
440 | if val.tag() in (value_e.Null, value_e.Bool, value_e.Int,
|
441 | value_e.Float, value_e.Str, value_e.List,
|
442 | value_e.Dict):
|
443 | ysh_type = ValType(val)
|
444 | maybe_type = [_Text("(" + ysh_type + ")"), _Break(" ")]
|
445 | else:
|
446 | maybe_type = []
|
447 |
|
448 | return _Group(
|
449 | _Concat(maybe_type + [self._Value(val, type_shown=True)]))
|
450 | else:
|
451 | return self._Value(val)
|
452 |
|
453 | def _Styled(self, style, mdoc):
|
454 | # type: (str, MeasuredDoc) -> MeasuredDoc
|
455 | """Apply the ANSI style string to the given node, if use_styles is set."""
|
456 | if self.use_styles:
|
457 | return _Concat([
|
458 | MeasuredDoc(doc.Text(style), _EmptyMeasure()), mdoc,
|
459 | MeasuredDoc(doc.Text(ansi.RESET), _EmptyMeasure())
|
460 | ])
|
461 | else:
|
462 | return mdoc
|
463 |
|
464 | def _Surrounded(self, open, mdoc, close):
|
465 | # type: (str, MeasuredDoc, str) -> MeasuredDoc
|
466 | """Print one of two options (using '[', ']' for open, close):
|
467 |
|
468 | ```
|
469 | [mdoc]
|
470 | ------
|
471 | [
|
472 | mdoc
|
473 | ]
|
474 | ```
|
475 | """
|
476 | return _Group(
|
477 | _Concat([
|
478 | _Text(open),
|
479 | _Indent(self.indent, _Concat([_Break(""), mdoc])),
|
480 | _Break(""),
|
481 | _Text(close)
|
482 | ]))
|
483 |
|
484 | def _SurroundedAndPrefixed(self, open, prefix, sep, mdoc, close):
|
485 | # type: (str, MeasuredDoc, str, MeasuredDoc, str) -> MeasuredDoc
|
486 | """Print one of two options
|
487 | (using '[', 'prefix', ':', 'mdoc', ']' for open, prefix, sep, mdoc, close):
|
488 |
|
489 | ```
|
490 | [prefix:mdoc]
|
491 | ------
|
492 | [prefix
|
493 | mdoc
|
494 | ]
|
495 | ```
|
496 | """
|
497 | return _Group(
|
498 | _Concat([
|
499 | _Text(open), prefix,
|
500 | _Indent(self.indent, _Concat([_Break(sep), mdoc])),
|
501 | _Break(""),
|
502 | _Text(close)
|
503 | ]))
|
504 |
|
505 | def _Join(self, items, sep, space):
|
506 | # type: (List[MeasuredDoc], str, str) -> MeasuredDoc
|
507 | """Join `items`, using either 'sep+space' or 'sep+newline' between them.
|
508 |
|
509 | E.g., if sep and space are ',' and '_', print one of these two cases:
|
510 | ```
|
511 | first,_second,_third
|
512 | ------
|
513 | first,
|
514 | second,
|
515 | third
|
516 | ```
|
517 | """
|
518 | seq = [] # type: List[MeasuredDoc]
|
519 | for i, item in enumerate(items):
|
520 | if i != 0:
|
521 | seq.append(_Text(sep))
|
522 | seq.append(_Break(space))
|
523 | seq.append(item)
|
524 | return _Concat(seq)
|
525 |
|
526 | def _Tabular(self, items, sep):
|
527 | # type: (List[MeasuredDoc], str) -> MeasuredDoc
|
528 | """Join `items` together, using one of three styles:
|
529 |
|
530 | (showing spaces as underscores for clarity)
|
531 | ```
|
532 | first,_second,_third,_fourth,_fifth,_sixth,_seventh,_eighth
|
533 | ------
|
534 | first,___second,__third,
|
535 | fourth,__fifth,___sixth,
|
536 | seventh,_eighth
|
537 | ------
|
538 | first,
|
539 | second,
|
540 | third,
|
541 | fourth,
|
542 | fifth,
|
543 | sixth,
|
544 | seventh,
|
545 | eighth
|
546 | ```
|
547 |
|
548 | The first "single line" style is used if the items fit on one line. The
|
549 | second "tabular' style is used if the flat width of all items is no
|
550 | greater than `self.max_tabular_width`. The third "multi line" style is
|
551 | used otherwise.
|
552 | """
|
553 |
|
554 | # Why not "just" use tabular alignment so long as two items fit on every
|
555 | # line? Because it isn't possible to check for that in the pretty
|
556 | # printing language. There are two sorts of conditionals we can do:
|
557 | #
|
558 | # A. Inside the pretty printing language, which supports exactly one
|
559 | # conditional: "does it fit on one line?".
|
560 | # B. Outside the pretty printing language we can run arbitrary Python
|
561 | # code, but we don't know how much space is available on the line
|
562 | # because it depends on the context in which we're printed, which may
|
563 | # vary.
|
564 | #
|
565 | # We're picking between the three styles, by using (A) to check if the
|
566 | # first style fits on one line, then using (B) with "are all the items
|
567 | # smaller than `self.max_tabular_width`?" to pick between style 2 and
|
568 | # style 3.
|
569 |
|
570 | if len(items) == 0:
|
571 | return _Text("")
|
572 |
|
573 | max_flat_len = 0
|
574 | seq = [] # type: List[MeasuredDoc]
|
575 | for i, item in enumerate(items):
|
576 | if i != 0:
|
577 | seq.append(_Text(sep))
|
578 | seq.append(_Break(" "))
|
579 | seq.append(item)
|
580 | max_flat_len = max(max_flat_len, item.measure.flat)
|
581 | non_tabular = _Concat(seq)
|
582 |
|
583 | sep_width = TryUnicodeWidth(sep)
|
584 | if max_flat_len + sep_width + 1 <= self.max_tabular_width:
|
585 | tabular_seq = [] # type: List[MeasuredDoc]
|
586 | for i, item in enumerate(items):
|
587 | tabular_seq.append(_Flat(item))
|
588 | if i != len(items) - 1:
|
589 | padding = max_flat_len - item.measure.flat + 1
|
590 | tabular_seq.append(_Text(sep))
|
591 | tabular_seq.append(_Group(_Break(" " * padding)))
|
592 | tabular = _Concat(tabular_seq)
|
593 | return _Group(_IfFlat(non_tabular, tabular))
|
594 | else:
|
595 | return non_tabular
|
596 |
|
597 | def _DictKey(self, s):
|
598 | # type: (str) -> MeasuredDoc
|
599 | if match.IsValidVarName(s):
|
600 | encoded = s
|
601 | else:
|
602 | if self.ysh_style:
|
603 | encoded = j8_lite.YshEncodeString(s)
|
604 | else:
|
605 | # TODO: remove this dead branch after fixing tests
|
606 | encoded = j8_lite.EncodeString(s)
|
607 | return _Text(encoded)
|
608 |
|
609 | def _StringLiteral(self, s):
|
610 | # type: (str) -> MeasuredDoc
|
611 | if self.ysh_style:
|
612 | # YSH r'' or b'' style
|
613 | encoded = j8_lite.YshEncodeString(s)
|
614 | else:
|
615 | # TODO: remove this dead branch after fixing tests
|
616 | encoded = j8_lite.EncodeString(s)
|
617 | return self._Styled(self.string_style, _Text(encoded))
|
618 |
|
619 | def _BashStringLiteral(self, s):
|
620 | # type: (str) -> MeasuredDoc
|
621 |
|
622 | # '' or $'' style
|
623 | #
|
624 | # We mimic bash syntax by using $'\\' instead of b'\\'
|
625 | #
|
626 | # $ declare -a array=($'\\')
|
627 | # $ = array
|
628 | # (BashArray) (BashArray $'\\')
|
629 | #
|
630 | # $ declare -A assoc=([k]=$'\\')
|
631 | # $ = assoc
|
632 | # (BashAssoc) (BashAssoc ['k']=$'\\')
|
633 |
|
634 | encoded = j8_lite.ShellEncode(s)
|
635 | return self._Styled(self.string_style, _Text(encoded))
|
636 |
|
637 | def _YshList(self, vlist):
|
638 | # type: (value.List) -> MeasuredDoc
|
639 | """Print a string literal."""
|
640 | if len(vlist.items) == 0:
|
641 | return _Text("[]")
|
642 | mdocs = [self._Value(item) for item in vlist.items]
|
643 | return self._Surrounded("[", self._Tabular(mdocs, ","), "]")
|
644 |
|
645 | def _YshDict(self, vdict):
|
646 | # type: (value.Dict) -> MeasuredDoc
|
647 | if len(vdict.d) == 0:
|
648 | return _Text("{}")
|
649 | mdocs = [] # type: List[MeasuredDoc]
|
650 | for k, v in iteritems(vdict.d):
|
651 | mdocs.append(
|
652 | _Concat([self._DictKey(k),
|
653 | _Text(": "),
|
654 | self._Value(v)]))
|
655 | return self._Surrounded("{", self._Join(mdocs, ",", " "), "}")
|
656 |
|
657 | def _BashArray(self, varray):
|
658 | # type: (value.BashArray) -> MeasuredDoc
|
659 | type_name = self._Styled(self.type_style, _Text("BashArray"))
|
660 | if len(varray.strs) == 0:
|
661 | return _Concat([_Text("("), type_name, _Text(")")])
|
662 | mdocs = [] # type: List[MeasuredDoc]
|
663 | for s in varray.strs:
|
664 | if s is None:
|
665 | mdocs.append(_Text("null"))
|
666 | else:
|
667 | mdocs.append(self._BashStringLiteral(s))
|
668 | return self._SurroundedAndPrefixed("(", type_name, " ",
|
669 | self._Tabular(mdocs, ""), ")")
|
670 |
|
671 | def _BashAssoc(self, vassoc):
|
672 | # type: (value.BashAssoc) -> MeasuredDoc
|
673 | type_name = self._Styled(self.type_style, _Text("BashAssoc"))
|
674 | if len(vassoc.d) == 0:
|
675 | return _Concat([_Text("("), type_name, _Text(")")])
|
676 | mdocs = [] # type: List[MeasuredDoc]
|
677 | for k2, v2 in iteritems(vassoc.d):
|
678 | mdocs.append(
|
679 | _Concat([
|
680 | _Text("["),
|
681 | self._BashStringLiteral(k2),
|
682 | _Text("]="),
|
683 | self._BashStringLiteral(v2)
|
684 | ]))
|
685 | return self._SurroundedAndPrefixed("(", type_name, " ",
|
686 | self._Join(mdocs, "", " "), ")")
|
687 |
|
688 | def _Value(self, val, type_shown=False):
|
689 | # type: (value_t, bool) -> MeasuredDoc
|
690 |
|
691 | with tagswitch(val) as case:
|
692 | if case(value_e.Null):
|
693 | return self._Styled(self.null_style, _Text("null"))
|
694 |
|
695 | elif case(value_e.Bool):
|
696 | b = cast(value.Bool, val).b
|
697 | return self._Styled(self.bool_style,
|
698 | _Text("true" if b else "false"))
|
699 |
|
700 | elif case(value_e.Int):
|
701 | i = cast(value.Int, val).i
|
702 | return self._Styled(self.number_style, _Text(mops.ToStr(i)))
|
703 |
|
704 | elif case(value_e.Float):
|
705 | f = cast(value.Float, val).f
|
706 | return self._Styled(self.number_style, _Text(_FloatString(f)))
|
707 |
|
708 | elif case(value_e.Str):
|
709 | s = cast(value.Str, val).s
|
710 | return self._StringLiteral(s)
|
711 |
|
712 | elif case(value_e.Range):
|
713 | r = cast(value.Range, val)
|
714 | type_name = self._Styled(self.type_style, _Text(ValType(r)))
|
715 | mdocs = [_Text(str(r.lower)), _Text(".."), _Text(str(r.upper))]
|
716 | return self._SurroundedAndPrefixed("(", type_name, " ",
|
717 | self._Join(mdocs, "", " "),
|
718 | ")")
|
719 |
|
720 | elif case(value_e.List):
|
721 | vlist = cast(value.List, val)
|
722 | heap_id = j8.HeapValueId(vlist)
|
723 | if self.visiting.get(heap_id, False):
|
724 | return _Concat([
|
725 | _Text("["),
|
726 | self._Styled(self.cycle_style, _Text("...")),
|
727 | _Text("]")
|
728 | ])
|
729 | else:
|
730 | self.visiting[heap_id] = True
|
731 | result = self._YshList(vlist)
|
732 | self.visiting[heap_id] = False
|
733 | return result
|
734 |
|
735 | elif case(value_e.Dict):
|
736 | vdict = cast(value.Dict, val)
|
737 | heap_id = j8.HeapValueId(vdict)
|
738 | if self.visiting.get(heap_id, False):
|
739 | return _Concat([
|
740 | _Text("{"),
|
741 | self._Styled(self.cycle_style, _Text("...")),
|
742 | _Text("}")
|
743 | ])
|
744 | else:
|
745 | self.visiting[heap_id] = True
|
746 | result = self._YshDict(vdict)
|
747 | self.visiting[heap_id] = False
|
748 | return result
|
749 |
|
750 | elif case(value_e.BashArray):
|
751 | varray = cast(value.BashArray, val)
|
752 | return self._BashArray(varray)
|
753 |
|
754 | elif case(value_e.BashAssoc):
|
755 | vassoc = cast(value.BashAssoc, val)
|
756 | return self._BashAssoc(vassoc)
|
757 |
|
758 | else:
|
759 | ysh_type = ValType(val)
|
760 | id_str = j8.ValueIdString(val)
|
761 | return self._Styled(self.type_style,
|
762 | _Text("<" + ysh_type + id_str + ">"))
|
763 |
|
764 |
|
765 | # vim: sw=4
|