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29996
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1 vim9script
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2
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3 # Vim indent file
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4 # Language: gdscript (Godot game engine)
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5 # Maintainer: Maxim Kim <habamax@gmail.com>
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6 # Based on python indent file.
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7
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8 if exists("b:did_indent")
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9 finish
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10 endif
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11 b:did_indent = 1
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12
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13 var undo_opts = "setl indentexpr< indentkeys< lisp< autoindent<"
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14
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15 if exists('b:undo_indent')
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16 b:undo_indent ..= "|" .. undo_opts
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17 else
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18 b:undo_indent = undo_opts
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19 endif
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20
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21 setlocal nolisp
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22 setlocal autoindent
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23 setlocal indentexpr=GDScriptIndent()
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24 setlocal indentkeys+=<:>,=elif,=except
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25
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26
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27 def GDScriptIndent(): number
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28 # If this line is explicitly joined: If the previous line was also joined,
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29 # line it up with that one, otherwise add two 'shiftwidth'
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30 if getline(v:lnum - 1) =~ '\\$'
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31 if v:lnum > 1 && getline(v:lnum - 2) =~ '\\$'
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32 return indent(v:lnum - 1)
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33 endif
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34 return indent(v:lnum - 1) + (shiftwidth() * 2)
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35 endif
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36
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37 # If the start of the line is in a string don't change the indent.
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38 if has('syntax_items') && synIDattr(synID(v:lnum, 1, 1), "name") =~ "String$"
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39 return -1
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40 endif
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41
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42 # Search backwards for the previous non-empty line.
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43 var plnum = prevnonblank(v:lnum - 1)
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44
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45 if plnum == 0
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46 # This is the first non-empty line, use zero indent.
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47 return 0
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48 endif
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49
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50 var plindent = indent(plnum)
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51 var plnumstart = plnum
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52
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53 # Get the line and remove a trailing comment.
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54 # Use syntax highlighting attributes when possible.
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55 var pline = getline(plnum)
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56 var pline_len = strlen(pline)
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57 if has('syntax_items')
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58 # If the last character in the line is a comment, do a binary search for
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59 # the start of the comment. synID() is slow, a linear search would take
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60 # too long on a long line.
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61 if synIDattr(synID(plnum, pline_len, 1), "name") =~ "\\(Comment\\|Todo\\)$"
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62 var min = 1
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63 var max = pline_len
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64 while min < max
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65 var col = (min + max) / 2
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66 if synIDattr(synID(plnum, col, 1), "name") =~ "\\(Comment\\|Todo\\)$"
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67 max = col
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68 else
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69 min = col + 1
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70 endif
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71 endwhile
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72 pline = strpart(pline, 0, min - 1)
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73 endif
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74 else
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75 var col = 0
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76 while col < pline_len
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77 if pline[col] == '#'
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78 pline = strpart(pline, 0, col)
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79 break
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80 endif
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81 col = col + 1
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82 endwhile
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83 endif
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84
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85
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86 # When "inside" parenthesis: If at the first line below the parenthesis add
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87 # one 'shiftwidth' ("inside" is simplified and not really checked)
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88 # my_var = (
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89 # a
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90 # + b
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91 # + c
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92 # )
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93 if pline =~ '[({\[]\s*$'
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94 return indent(plnum) + shiftwidth()
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95 endif
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96
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97
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98 # If the previous line ended with a colon, indent this line
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99 if pline =~ ':\s*$'
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100 return plindent + shiftwidth()
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101 endif
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102
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103 # If the previous line was a stop-execution statement...
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104 if getline(plnum) =~ '^\s*\(break\|continue\|raise\|return\|pass\)\>'
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105 # See if the user has already dedented
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106 if indent(v:lnum) > indent(plnum) - shiftwidth()
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107 # If not, recommend one dedent
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108 return indent(plnum) - shiftwidth()
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109 endif
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110 # Otherwise, trust the user
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111 return -1
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112 endif
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113
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114 # If the current line begins with a keyword that lines up with "try"
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115 if getline(v:lnum) =~ '^\s*\(except\|finally\)\>'
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116 var lnum = v:lnum - 1
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117 while lnum >= 1
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118 if getline(lnum) =~ '^\s*\(try\|except\)\>'
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119 var ind = indent(lnum)
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120 if ind >= indent(v:lnum)
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121 return -1 # indent is already less than this
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122 endif
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123 return ind # line up with previous try or except
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124 endif
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125 lnum = lnum - 1
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126 endwhile
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127 return -1 # no matching "try"!
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128 endif
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129
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130
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131 # If the current line begins with a header keyword, dedent
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132 if getline(v:lnum) =~ '^\s*\(elif\|else\)\>'
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133
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134 # Unless the previous line was a one-liner
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135 if getline(plnumstart) =~ '^\s*\(for\|if\|try\)\>'
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136 return plindent
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137 endif
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138
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139 # Or the user has already dedented
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140 if indent(v:lnum) <= plindent - shiftwidth()
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141 return -1
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142 endif
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143
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144 return plindent - shiftwidth()
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145 endif
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146
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147 return -1
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148 enddef
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