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1 " Vim indent file
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2 " Language: Java
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48
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3 " Previous Maintainer: Toby Allsopp <toby.allsopp@peace.com>
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4 " Current Maintainer: Hong Xu <xuhdev@gmail.com>
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5 " Last Change: 2012 May 18
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6 " Version: 1.0
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7 " License: Same as Vim.
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8 " Copyright (c) 2012 Hong Xu
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9 " Before 2012, this file is maintained by Toby Allsopp.
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10
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11 " Only load this indent file when no other was loaded.
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12 if exists("b:did_indent")
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13 finish
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14 endif
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15 let b:did_indent = 1
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16
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17 " Indent Java anonymous classes correctly.
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18 setlocal cindent cinoptions& cinoptions+=j1
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19
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20 " The "extends" and "implements" lines start off with the wrong indent.
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21 setlocal indentkeys& indentkeys+=0=extends indentkeys+=0=implements
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22
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23 " Set the function to do the work.
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24 setlocal indentexpr=GetJavaIndent()
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25
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26 let b:undo_indent = "set cin< cino< indentkeys< indentexpr<"
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27
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28 " Only define the function once.
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29 if exists("*GetJavaIndent")
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30 finish
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31 endif
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48
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32 let s:keepcpo= &cpo
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33 set cpo&vim
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34
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35 function! SkipJavaBlanksAndComments(startline)
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36 let lnum = a:startline
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37 while lnum > 1
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38 let lnum = prevnonblank(lnum)
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39 if getline(lnum) =~ '\*/\s*$'
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40 while getline(lnum) !~ '/\*' && lnum > 1
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41 let lnum = lnum - 1
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42 endwhile
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43 if getline(lnum) =~ '^\s*/\*'
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44 let lnum = lnum - 1
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45 else
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46 break
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47 endif
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48 elseif getline(lnum) =~ '^\s*//'
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49 let lnum = lnum - 1
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50 else
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51 break
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52 endif
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53 endwhile
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54 return lnum
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55 endfunction
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56
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57 function GetJavaIndent()
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58
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59 " Java is just like C; use the built-in C indenting and then correct a few
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60 " specific cases.
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61 let theIndent = cindent(v:lnum)
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62
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63 " If we're in the middle of a comment then just trust cindent
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64 if getline(v:lnum) =~ '^\s*\*'
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65 return theIndent
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66 endif
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67
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68 " find start of previous line, in case it was a continuation line
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69 let lnum = SkipJavaBlanksAndComments(v:lnum - 1)
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48
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70
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71 " If the previous line starts with '@', we should have the same indent as
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72 " the previous one
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73 if getline(lnum) =~ '^\s*@\S\+\s*$'
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74 return indent(lnum)
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75 endif
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76
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77 let prev = lnum
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78 while prev > 1
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79 let next_prev = SkipJavaBlanksAndComments(prev - 1)
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80 if getline(next_prev) !~ ',\s*$'
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81 break
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82 endif
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83 let prev = next_prev
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84 endwhile
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85
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86 " Try to align "throws" lines for methods and "extends" and "implements" for
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87 " classes.
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88 if getline(v:lnum) =~ '^\s*\(extends\|implements\)\>'
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89 \ && getline(lnum) !~ '^\s*\(extends\|implements\)\>'
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90 let theIndent = theIndent + &sw
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91 endif
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92
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93 " correct for continuation lines of "throws", "implements" and "extends"
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94 let cont_kw = matchstr(getline(prev),
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95 \ '^\s*\zs\(throws\|implements\|extends\)\>\ze.*,\s*$')
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96 if strlen(cont_kw) > 0
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97 let amount = strlen(cont_kw) + 1
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98 if getline(lnum) !~ ',\s*$'
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99 let theIndent = theIndent - (amount + &sw)
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100 if theIndent < 0
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101 let theIndent = 0
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102 endif
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103 elseif prev == lnum
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104 let theIndent = theIndent + amount
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105 if cont_kw ==# 'throws'
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106 let theIndent = theIndent + &sw
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107 endif
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108 endif
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109 elseif getline(prev) =~ '^\s*\(throws\|implements\|extends\)\>'
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110 \ && (getline(prev) =~ '{\s*$'
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111 \ || getline(v:lnum) =~ '^\s*{\s*$')
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112 let theIndent = theIndent - &sw
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113 endif
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114
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115 " When the line starts with a }, try aligning it with the matching {,
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116 " skipping over "throws", "extends" and "implements" clauses.
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117 if getline(v:lnum) =~ '^\s*}\s*\(//.*\|/\*.*\)\=$'
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118 call cursor(v:lnum, 1)
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119 silent normal %
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120 let lnum = line('.')
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121 if lnum < v:lnum
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122 while lnum > 1
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123 let next_lnum = SkipJavaBlanksAndComments(lnum - 1)
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124 if getline(lnum) !~ '^\s*\(throws\|extends\|implements\)\>'
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125 \ && getline(next_lnum) !~ ',\s*$'
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126 break
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127 endif
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128 let lnum = prevnonblank(next_lnum)
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129 endwhile
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130 return indent(lnum)
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131 endif
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132 endif
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133
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134 " Below a line starting with "}" never indent more. Needed for a method
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135 " below a method with an indented "throws" clause.
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136 let lnum = SkipJavaBlanksAndComments(v:lnum - 1)
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137 if getline(lnum) =~ '^\s*}\s*\(//.*\|/\*.*\)\=$' && indent(lnum) < theIndent
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138 let theIndent = indent(lnum)
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139 endif
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140
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141 return theIndent
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142 endfunction
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143
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48
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144 let &cpo = s:keepcpo
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145 unlet s:keepcpo
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146
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147 " vi: sw=2 et
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