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annotate scripts/gui/questdlg.m @ 20770:c1a6c31ac29a

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eliminate more simple uses of error_state * ov-classdef.cc: Eliminate simple uses of error_state.
author John W. Eaton <jwe@octave.org>
date Tue, 06 Oct 2015 00:20:02 -0400
parents 777f26aa8e3e
children
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rev   line source
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d63878346099 maint: Update copyright notices for release.
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1 ## Copyright (C) 2010, 2013 Martin Hepperle
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2 ##
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3 ## This file is part of Octave.
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4 ##
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5 ## Octave is free software; you can redistribute it and/or modify it
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6 ## under the terms of the GNU General Public License as published by
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7 ## the Free Software Foundation; either version 3 of the License, or (at
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8 ## your option) any later version.
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9 ##
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10 ## Octave is distributed in the hope that it will be useful, but
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 ## General Public License for more details.
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14 ##
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15 ## You should have received a copy of the GNU General Public License
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16 ## along with Octave; see the file COPYING. If not, see
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17 ## <http://www.gnu.org/licenses/>.
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18
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19 ## -*- texinfo -*-
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20 ## @deftypefn {Function File} {@var{btn} =} questdlg (@var{msg})
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21 ## @deftypefnx {Function File} {@var{btn} =} questdlg (@var{msg}, @var{title})
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22 ## @deftypefnx {Function File} {@var{btn} =} questdlg (@var{msg}, @var{title}, @var{default})
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23 ## @deftypefnx {Function File} {@var{btn} =} questdlg (@var{msg}, @var{title}, @var{btn1}, @var{btn2}, @var{default})
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24 ## @deftypefnx {Function File} {@var{btn} =} questdlg (@var{msg}, @var{title}, @var{btn1}, @var{btn2}, @var{btn3}, @var{default})
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25 ## Display @var{msg} using a question dialog box and return the caption of
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26 ## the activated button.
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27 ##
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28 ## The dialog may contain two or three buttons which will all close the dialog.
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29 ##
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30 ## The message may have multiple lines separated by newline characters ("\n"),
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31 ## or it may be a cellstr array with one element for each line.
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32 ##
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33 ## The optional @var{title} (character string) can be used to decorate the
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34 ## dialog caption.
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35 ##
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36 ## The string @var{default} identifies the default button, which is activated
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37 ## by pressing the @key{ENTER} key. It must match one of the strings given
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38 ## in @var{btn1}, @var{btn2}, or @var{btn3}.
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39 ##
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40 ## If only @var{msg} and @var{title} are specified, three buttons with the
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41 ## default captions @qcode{"Yes"}, @qcode{"No"}, and @qcode{"Cancel"} are used.
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42 ##
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43 ## If only two button captions, @var{btn1} and @var{btn2}, are specified the
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44 ## dialog will have only these two buttons.
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45 ##
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46 ## @seealso{errordlg, helpdlg, inputdlg, listdlg, warndlg}
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47 ## @end deftypefn
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48
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49 function btn = questdlg (msg, title = "Question Dialog", varargin)
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50
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51 if (nargin < 1 || nargin > 6)
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52 print_usage ();
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53 endif
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54
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55 if (! ischar (msg))
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56 if (iscell (msg))
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57 msg = sprintf ("%s\n", msg{:});
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58 msg(end) = "";
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59 else
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60 error ("questdlg: MSG must be a character string or cellstr array");
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61 endif
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62 endif
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63
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64 if (! ischar (title))
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65 error ("questdlg: TITLES must be a character string");
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66 endif
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67
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68 options{1} = "Yes"; # button1
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69 options{2} = "No"; # button2
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70 options{3} = "Cancel"; # button3
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71 options{4} = "Yes"; # default
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72
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73 defbtn_error_msg = "questdlg: DEFAULT must match one of the button options";
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74
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75 switch (numel (varargin))
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76 case 0
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77 ## use default default
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78
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79 case 1
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80 ## default button string
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81 options{4} = varargin{1}; # default
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82 if (! any (strcmp (options{4}, options(1:3))))
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83 error (defbtn_error_msg);
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84 endif
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85
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86 case 3
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87 ## two buttons and default button string
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88 options{1} = varargin{1}; # button1
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89 options{2} = ""; # not used, no middle button
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90 options{3} = varargin{2}; # button3
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91 options{4} = varargin{3}; # default
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92 if (! any (strcmp (options{4}, options([1 3]))))
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93 error (defbtn_error_msg);
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94 endif
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95
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96 case 4
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97 ## three buttons and default button string
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98 options{1} = varargin{1}; # button1
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99 options{2} = varargin{2}; # button2
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100 options{3} = varargin{3}; # button3
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101 options{4} = varargin{4}; # default
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102 if (! any (strcmp (options{4}, options(1:3))))
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103 error (defbtn_error_msg);
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104 endif
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105
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106 otherwise
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107 print_usage ();
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108
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109 endswitch
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110
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111 if (__octave_link_enabled__ ())
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112 btn = __octave_link_question_dialog__ (msg, title, options{1}, options{2},
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113 options{3}, options{4});
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114 elseif (__have_feature__ ("JAVA"))
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115 btn = javaMethod ("questdlg", "org.octave.JDialogBox", msg,
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116 title, options);
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117 else
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118 error ("questdlg is not available in this version of Octave");
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119 endif
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120
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121 endfunction
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122
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123
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124 %!demo
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125 %! disp ('- test questdlg with two buttons');
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126 %! a = questdlg ('Would you like some free money?',...
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127 %! '$ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $',...
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128 %! 'No', 'Cancel', 'Cancel');
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129 %! if (strcmp (a, 'No'))
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130 %! msgbox ('Suit yourself.', 'Message Box');
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131 %! endif
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132
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133 %!demo
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134 %! disp ('- test questdlg with message and title only.');
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135 %! a = 'No';
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136 %! c = 0;
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137 %! while (strcmp (a, 'No') || !c)
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138 %! a = questdlg ('Close this Question Dialog?', 'Reductio Ad Absurdum');
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139 %! if (strcmp (a, 'Yes'))
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140 %! q = 'Are you sure?';
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141 %! while (strcmp (a, 'Yes') && !c)
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142 %! a = questdlg (q, 'Reductio Ad Absurdum');
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143 %! word = ' really';
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144 %! i = strfind (q, word);
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145 %! if (isempty (i))
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146 %! i = strfind (q, ' sure');
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147 %! q = [q '!'];
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148 %! else
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149 %! word = [word ','];
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150 %! endif
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151 %! q = [q(1:i-1) word q(i:end)];
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152 %! endwhile
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153 %! endif
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154 %! if (strcmp (a, 'Cancel'))
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155 %! warndlg ('Answer "Yes" or "No".', 'Warning Dialog');
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156 %! a = 'No';
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157 %! c = 1;
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158 %! endif
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159 %! endwhile
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160 %! msgbox ('Whew!');
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161
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162 %!demo
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163 %! disp ('- test questdlg with five inputs');
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164 %! ans = questdlg ('Are you ready Steve?', 'Brian', 'No', 'Uh huh', 'Uh huh');
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165 %! if (! strcmp (ans, 'No'))
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166 %! ans = questdlg ('Andy?', 'Brian', 'No', 'Yeah', 'Yeah');
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Rik <rik@octave.org>
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167 %! if (! strcmp (ans, 'No'))
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168 %! ans = questdlg ('Mick?', 'Brian', 'No', 'Okay', 'Okay');
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Rik <rik@octave.org>
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169 %! if (! strcmp (ans, 'No'))
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170 %! ans = msgbox ("Well all right, fellas. \n\n Let''s GO!!!!!",...
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171 %! 'Ballroom Blitz', 'none');
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Rik <rik@octave.org>
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172 %! endif
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173 %! endif
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174 %! endif
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175