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1 % rail.sty - style file to support railroad diagrams |
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2 % |
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3 % 09-Jul-90 L. Rooijakkers |
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4 % 08-Oct-90 L. Rooijakkers fixed centering bug when \rail@tmpc<0. |
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5 % 07-Feb-91 L. Rooijakkers added \railoptions command, indexing |
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6 % 08-Feb-91 L. Rooijakkers minor fixes |
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7 % 28-Jun-94 K. Barthelmann turned into LaTeX2e package |
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8 % 08-Dec-96 K. Barthelmann replaced \@writefile |
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9 % 13-Dec-96 K. Barthelmann cleanup |
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10 % |
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11 % This style file needs to be used in conjunction with the 'rail' |
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12 % program. Running LaTeX as 'latex file' produces file.rai, which should be |
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13 % processed by Rail with 'rail file'. This produces file.rao, which will |
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14 % be picked up by LaTeX on the next 'latex file' run. |
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15 % |
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16 % LaTeX will warn if there is no file.rao or it's out of date. |
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17 % |
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18 % The macros in this file thus consist of two parts: those that read and |
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19 % write the .rai and .rao files, and those that do the actual formatting |
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20 % of the railroad diagrams. |
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21 |
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22 \NeedsTeXFormat{LaTeX2e} |
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23 \ProvidesPackage{rail}[1996/12/13] |
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24 |
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25 % railroad diagram formatting parameters (user level) |
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26 % all of these are copied into their internal versions by \railinit |
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27 % |
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28 % \railunit : \unitlength within railroad diagrams |
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29 % \railextra : extra length at outside of diagram |
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30 % \railboxheight : height of ovals and frames |
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31 % \railboxskip : vertical space between lines |
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32 % \railboxleft : space to the left of a box |
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33 % \railboxright : space to the right of a box |
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34 % \railovalspace : extra space around contents of oval |
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35 % \railframespace : extra space around contents of frame |
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36 % \railtextleft : space to the left of text |
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37 % \railtextright : space to the right of text |
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38 % \railtextup : space to lift text up |
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39 % \railjoinsize : circle size of join/split arcs |
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40 % \railjoinadjust : space to adjust join |
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41 % |
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42 % \railnamesep : separator between name and rule body |
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43 |
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44 \newlength\railunit |
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45 \newlength\railextra |
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46 \newlength\railboxheight |
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47 \newlength\railboxskip |
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48 \newlength\railboxleft |
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49 \newlength\railboxright |
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50 \newlength\railovalspace |
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51 \newlength\railframespace |
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52 \newlength\railtextleft |
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53 \newlength\railtextright |
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54 \newlength\railtextup |
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55 \newlength\railjoinsize |
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56 \newlength\railjoinadjust |
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57 \newlength\railnamesep |
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58 |
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59 % initialize the parameters |
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60 |
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61 \setlength\railunit{1sp} |
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62 \setlength\railextra{4ex} |
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63 \setlength\railboxleft{1ex} |
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64 \setlength\railboxright{1ex} |
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65 \setlength\railovalspace{2ex} |
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66 \setlength\railframespace{2ex} |
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67 \setlength\railtextleft{1ex} |
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68 \setlength\railtextright{1ex} |
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69 \setlength\railjoinadjust{0pt} |
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70 \setlength\railnamesep{1ex} |
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71 |
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72 \DeclareOption{10pt}{ |
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73 \setlength\railboxheight{16pt} |
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74 \setlength\railboxskip{24pt} |
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75 \setlength\railtextup{5pt} |
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76 \setlength\railjoinsize{16pt} |
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77 } |
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78 \DeclareOption{11pt}{ |
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79 \setlength\railboxheight{16pt} |
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80 \setlength\railboxskip{24pt} |
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81 \setlength\railtextup{5pt} |
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82 \setlength\railjoinsize{16pt} |
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83 } |
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84 \DeclareOption{12pt}{ |
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85 \setlength\railboxheight{20pt} |
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86 \setlength\railboxskip{28pt} |
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87 \setlength\railtextup{6pt} |
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88 \setlength\railjoinsize{20pt} |
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89 } |
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90 |
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91 \ExecuteOptions{10pt} |
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92 \ProcessOptions |
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93 |
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94 % internal versions of the formatting parameters |
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95 % |
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96 % \rail@extra : \railextra |
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97 % \rail@boxht : \railboxheight |
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98 % \rail@boxsp : \railboxskip |
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99 % \rail@boxlf : \railboxleft |
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100 % \rail@boxrt : \railboxright |
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101 % \rail@boxhht : \railboxheight / 2 |
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102 % \rail@ovalsp : \railovalspace |
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103 % \rail@framesp : \railframespace |
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104 % \rail@textlf : \railtextleft |
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105 % \rail@textrt : \railtextright |
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106 % \rail@textup : \railtextup |
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107 % \rail@joinsz : \railjoinsize |
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108 % \rail@joinhsz : \railjoinsize / 2 |
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109 % \rail@joinadj : \railjoinadjust |
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110 % |
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111 % \railinit : internalize all of the parameters. |
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112 |
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113 \newcount\rail@extra |
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114 \newcount\rail@boxht |
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115 \newcount\rail@boxsp |
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116 \newcount\rail@boxlf |
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117 \newcount\rail@boxrt |
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118 \newcount\rail@boxhht |
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119 \newcount\rail@ovalsp |
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120 \newcount\rail@framesp |
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121 \newcount\rail@textlf |
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122 \newcount\rail@textrt |
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123 \newcount\rail@textup |
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124 \newcount\rail@joinsz |
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125 \newcount\rail@joinhsz |
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126 \newcount\rail@joinadj |
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127 |
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128 \newcommand\railinit{ |
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129 \rail@extra=\railextra |
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130 \divide\rail@extra by \railunit |
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131 \rail@boxht=\railboxheight |
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132 \divide\rail@boxht by \railunit |
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133 \rail@boxsp=\railboxskip |
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134 \divide\rail@boxsp by \railunit |
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135 \rail@boxlf=\railboxleft |
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136 \divide\rail@boxlf by \railunit |
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137 \rail@boxrt=\railboxright |
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138 \divide\rail@boxrt by \railunit |
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139 \rail@boxhht=\railboxheight |
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140 \divide\rail@boxhht by \railunit |
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141 \divide\rail@boxhht by 2 |
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142 \rail@ovalsp=\railovalspace |
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143 \divide\rail@ovalsp by \railunit |
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144 \rail@framesp=\railframespace |
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145 \divide\rail@framesp by \railunit |
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146 \rail@textlf=\railtextleft |
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147 \divide\rail@textlf by \railunit |
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148 \rail@textrt=\railtextright |
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149 \divide\rail@textrt by \railunit |
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150 \rail@textup=\railtextup |
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151 \divide\rail@textup by \railunit |
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152 \rail@joinsz=\railjoinsize |
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153 \divide\rail@joinsz by \railunit |
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154 \rail@joinhsz=\railjoinsize |
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155 \divide\rail@joinhsz by \railunit |
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156 \divide\rail@joinhsz by 2 |
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157 \rail@joinadj=\railjoinadjust |
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158 \divide\rail@joinadj by \railunit |
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159 } |
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160 |
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161 \AtBeginDocument{\railinit} |
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162 |
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163 % \rail@param : declarations for list environment |
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164 % |
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165 % \railparam{TEXT} : sets \rail@param to TEXT |
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166 |
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167 \def\rail@param{} |
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168 |
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169 \newcommand\railparam[1]{ |
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170 \def\rail@param{#1} |
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171 } |
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172 |
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173 % \rail@tokenfont : format setup for \railtoken identifiers |
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174 % |
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175 % \rail@termfont : format setup for terminals |
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176 % |
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177 % \rail@nontfont : format setup for nonterminals |
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178 % |
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179 % \rail@annofont : format setup for annotations |
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180 % |
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181 % \rail@rulefont : format setup for rule names |
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182 % |
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183 % \rail@indexfont : format setup for index entry |
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184 % |
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185 % \railtermfont{TEXT} : set terminal format setup to TEXT |
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186 % |
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187 % \railnontermfont{TEXT} : set nonterminal format setup to TEXT |
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188 % |
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189 % \railannotatefont{TEXT} : set annotation format setup to TEXT |
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190 % |
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191 % \railnamefont{TEXT} : set rule name format setup to TEXT |
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192 % |
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193 % \railindexfont{TEXT} : set index entry format setup to TEXT |
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194 |
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195 \def\rail@termfont{\ttfamily\upshape} |
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196 \def\rail@nontfont{\rmfamily\upshape} |
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197 \def\rail@annofont{\rmfamily\itshape} |
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198 \def\rail@namefont{\rmfamily\itshape} |
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199 \def\rail@indexfont{\rmfamily\itshape} |
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200 |
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201 \newcommand\railtermfont[1]{ |
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202 \def\rail@termfont{#1} |
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203 } |
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204 |
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205 \newcommand\railnontermfont[1]{ |
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206 \def\rail@nontfont{#1} |
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207 } |
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208 |
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209 \newcommand\railannotatefont[1]{ |
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210 \def\rail@annofont{#1} |
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211 } |
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212 |
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213 \newcommand\railnamefont[1]{ |
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214 \def\rail@namefont{#1} |
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215 } |
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216 |
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217 \newcommand\railindexfont[1]{ |
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218 \def\rail@indexfont{#1} |
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219 } |
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220 |
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221 % railroad read/write macros |
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222 % |
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223 % \begin{rail} TEXT \end{rail} : TEXT is written out to the .rai file, |
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224 % as \rail@i{NR}{TEXT}. Then the matching |
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225 % \rail@o{NR}{FMT} from the .rao file is |
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226 % executed (if defined). |
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227 % |
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228 % \railoptions{OPTIONS} : OPTIONS are written out to the .rai file, |
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229 % as \rail@p{OPTIONS}. |
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230 % |
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231 % \railterm{IDENT,IDENT,...} : format IDENT as terminals. writes out |
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232 % \rail@t{IDENT} to the .rai file |
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233 % |
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234 % \railalias{IDENT}{TEXT} : format IDENT as TEXT. defines \rail@t@IDENT as |
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235 % TEXT. |
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236 % |
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237 % \rail@nr : railroad diagram counter |
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238 % |
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239 % \ifrail@match : current \rail@i{NR}{TEXT} matches |
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240 % |
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241 % \rail@first : actions to be done first. read in .rao file, |
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242 % open .rai file if \@filesw true, undefine \rail@first. |
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243 % executed from \begin{rail} and \railtoken. |
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244 % |
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245 % \rail@i{NR}{TEXT} : defines \rail@i@NR as TEXT. written to the .rai |
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246 % file by \rail, read from the .rao file by |
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247 % \rail@first |
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248 % |
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249 % \rail@t{IDENT} : tells Rail that IDENT is to be custom formatted, |
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250 % written to the .rai file by \railterm. |
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251 % |
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252 % \rail@o{NR}{TEXT} : defines \rail@o@NR as TEXT, read from the .rao |
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253 % file by \rail@first. |
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254 % |
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255 % \rail@p{OPTIONS} : pass options to rail, written to the .rai file by |
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256 % \railoptions |
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257 % |
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258 % \rail@write{TEXT} : write TEXT to the .rai file |
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259 % |
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260 % \rail@warn : warn user for mismatching diagrams |
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261 % |
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262 % \rail@endwarn : either \relax or \rail@warn |
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263 % |
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264 % \ifrail@all : checked at the end of the document |
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265 |
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266 \newcount\rail@nr |
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267 |
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268 \newif\ifrail@all |
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269 \rail@alltrue |
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270 |
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271 \newif\ifrail@match |
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272 |
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273 \def\rail@first{ |
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274 \makeatletter |
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275 \InputIfFileExists{\jobname.rao}{}{\PackageInfo{rail}{No file \jobname.rao}} |
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276 \makeatother |
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277 \if@filesw |
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278 \newwrite\tf@rai |
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279 \immediate\openout\tf@rai=\jobname.rai |
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280 \fi |
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281 \global\let\rail@first=\relax |
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282 } |
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283 |
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284 \long\def\rail@body#1\end{ |
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285 \begingroup |
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286 \let\\=\relax |
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287 \xdef\rail@i@{#1} |
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288 \rail@write{\string\rail@i{\number\rail@nr}{\rail@i@}} |
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289 \endgroup |
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290 \end |
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291 } |
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292 |
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293 \newenvironment{rail}{ |
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294 \global\advance\rail@nr by 1 |
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295 \rail@first |
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296 \rail@body |
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297 }{ |
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298 \rail@matchtrue |
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299 \@ifundefined{rail@o@\number\rail@nr}{\rail@matchfalse}{} |
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300 \expandafter\ifx\csname rail@i@\number\rail@nr\endcsname\rail@i@ |
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301 \else |
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302 \rail@matchfalse |
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303 \fi |
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304 \ifrail@match |
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305 \csname rail@o@\number\rail@nr\endcsname |
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306 \else |
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307 \PackageWarning{rail}{Railroad diagram {\number\rail@nr} doesn't match} |
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308 \global\let\rail@endwarn=\rail@warn |
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309 \begin{list}{}{\rail@param} |
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310 \rail@begin{1}{} |
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311 \rail@setbox{\bfseries ???} |
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312 \rail@oval |
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313 \rail@end |
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314 \end{list} |
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315 \fi |
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316 } |
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317 |
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318 \newcommand\railoptions[1]{ |
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319 \rail@first |
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320 \rail@write{\string\rail@p{#1}} |
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321 } |
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322 |
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323 \newcommand\railterm[1]{ |
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324 \rail@first |
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325 \@for\rail@@:=#1\do{ |
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326 \rail@write{\string\rail@t{\rail@@}} |
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327 } |
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328 } |
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329 |
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330 \newcommand\railalias[2]{ |
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331 \expandafter\def\csname rail@t@#1\endcsname{#2} |
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332 } |
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333 |
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334 \long\def\rail@i#1#2{ |
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335 \expandafter\gdef\csname rail@i@#1\endcsname{#2} |
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336 } |
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337 |
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338 \def\rail@o#1#2{ |
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339 \expandafter\gdef\csname rail@o@#1\endcsname{ |
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340 \begin{list}{}{\rail@param}#2\end{list} |
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341 } |
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342 } |
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343 |
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344 \def\rail@t#1{} |
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345 |
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346 \def\rail@p#1{} |
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347 |
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348 \def\rail@write#1{\@ifundefined{tf@rai}{}{\immediate\write\tf@rai{#1}}} |
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349 |
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350 \def\rail@warn{ |
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351 \PackageWarningNoLine{rail}{Railroad diagram(s) may have changed. |
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352 Use 'rail' and rerun} |
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353 } |
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354 |
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355 \let\rail@endwarn=\relax |
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356 |
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357 \AtEndDocument{\rail@endwarn} |
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358 |
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359 % index entry macro |
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360 % |
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361 % \rail@index{IDENT} : add index entry for IDENT |
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362 |
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363 \def\rail@index#1{ |
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364 \index{\rail@indexfont#1} |
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365 } |
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366 |
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367 % railroad formatting primitives |
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368 % |
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369 % \rail@x : current x |
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370 % \rail@y : current y |
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371 % \rail@ex : current end x |
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372 % \rail@sx : starting x for \rail@cr |
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373 % \rail@rx : rightmost previous x for \rail@cr |
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374 % |
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375 % \rail@tmpa : temporary count |
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376 % \rail@tmpb : temporary count |
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377 % \rail@tmpc : temporary count |
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378 % |
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379 % \rail@put : put at (\rail@x,\rail@y) |
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380 % |
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381 % \rail@eline : end line by drawing from \rail@ex to \rail@x |
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382 % |
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383 % \rail@sety{LEVEL} : set \rail@y to level LEVEL |
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384 |
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385 \newcount\rail@x |
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386 \newcount\rail@y |
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387 \newcount\rail@ex |
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388 \newcount\rail@sx |
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389 \newcount\rail@rx |
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390 |
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391 \newcount\rail@tmpa |
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392 \newcount\rail@tmpb |
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393 \newcount\rail@tmpc |
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394 |
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395 \def\rail@put{\put(\number\rail@x,\number\rail@y)} |
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396 |
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397 \def\rail@eline{ |
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398 \rail@tmpb=\rail@x |
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399 \advance\rail@tmpb by -\rail@ex |
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400 \rail@put{\line(-1,0){\number\rail@tmpb}} |
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401 } |
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402 |
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403 \def\rail@sety#1{ |
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404 \rail@y=#1 |
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405 \multiply\rail@y by -\rail@boxsp |
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406 \advance\rail@y by -\rail@boxht |
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407 } |
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408 |
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409 % \rail@begin{HEIGHT}{NAME} : begin a railroad diagram of height HEIGHT |
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410 % |
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411 % \rail@end : end a railroad diagram |
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412 % |
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413 % \rail@expand{IDENT} : expand IDENT |
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414 |
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415 \def\rail@begin#1#2{ |
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416 \item[] |
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417 \begin{minipage}[t]{\linewidth} |
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418 \ifx\@empty#2\else |
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419 {\rail@namefont \rail@expand{#2}}\\*[\railnamesep] |
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420 \fi |
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421 \unitlength=\railunit |
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422 \rail@tmpa=#1 |
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423 \multiply\rail@tmpa by \rail@boxsp |
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424 \begin{picture}(0,\number\rail@tmpa)(0,-\number\rail@tmpa) |
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425 \rail@ex=0 |
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426 \rail@rx=0 |
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427 \rail@x=\rail@extra |
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428 \rail@sx=\rail@x |
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429 \rail@sety{0} |
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430 } |
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431 |
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432 \def\rail@end{ |
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433 \advance\rail@x by \rail@extra |
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434 \rail@eline |
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435 \end{picture} |
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436 \end{minipage} |
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437 } |
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438 |
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439 \def\rail@expand#1{\@ifundefined{rail@t@#1}{#1}{\csname rail@t@#1\endcsname}} |
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440 |
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441 % \rail@token{TEXT}[ANNOT] : format token TEXT with annotation |
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442 % |
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443 % \rail@ctoken{TEXT}[ANNOT] : format token TEXT centered with annotation |
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444 % |
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445 % \rail@nont{TEXT}[ANNOT] : format nonterminal TEXT with annotation |
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446 % |
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447 % \rail@cnont{TEXT}[ANNOT] : format nonterminal TEXT centered with annotation |
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448 % |
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449 % \rail@term{TEXT}[ANNOT] : format terminal TEXT with annotation |
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450 % |
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451 % \rail@cterm{TEXT}[ANNOT] : format terminal TEXT centered with annotation |
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452 % |
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453 % \rail@annote[TEXT] : format TEXT as annotation |
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454 |
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455 \def\rail@token#1[#2]{ |
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456 \rail@setbox{% |
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457 {\rail@termfont \rail@expand{#1}}\ifx\@empty#2\else\ {\rail@annofont #2}\fi |
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458 } |
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459 \rail@oval |
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460 } |
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461 |
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462 \def\rail@ctoken#1[#2]{ |
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463 \rail@setbox{% |
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464 {\rail@termfont \rail@expand{#1}}\ifx\@empty#2\else\ {\rail@annofont #2}\fi |
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465 } |
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466 \rail@coval |
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467 } |
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468 |
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469 \def\rail@nont#1[#2]{ |
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470 \rail@setbox{% |
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471 {\rail@nontfont \rail@expand{#1}}\ifx\@empty#2\else\ {\rail@annofont #2}\fi |
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472 } |
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473 \rail@frame |
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474 } |
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475 |
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476 \def\rail@cnont#1[#2]{ |
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477 \rail@setbox{% |
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478 {\rail@nontfont \rail@expand{#1}}\ifx\@empty#2\else\ {\rail@annofont #2}\fi |
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479 } |
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480 \rail@cframe |
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481 } |
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482 |
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483 \def\rail@term#1[#2]{ |
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484 \rail@setbox{% |
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485 {\rail@termfont #1}\ifx\@empty#2\else\ {\rail@annofont #2}\fi |
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486 } |
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487 \rail@oval |
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488 } |
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489 |
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490 \def\rail@cterm#1[#2]{ |
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491 \rail@setbox{% |
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492 {\rail@termfont #1}\ifx\@empty#2\else\ {\rail@annofont #2}\fi |
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493 } |
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494 \rail@coval |
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495 } |
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496 |
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497 \def\rail@annote[#1]{ |
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498 \rail@setbox{\rail@annofont #1} |
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499 \rail@text |
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500 } |
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501 |
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502 % \rail@box : temporary box for \rail@oval and \rail@frame |
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503 % |
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504 % \rail@setbox{TEXT} : set \rail@box to TEXT, set \rail@tmpa to width |
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505 % |
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506 % \rail@oval : format \rail@box of width \rail@tmpa inside an oval |
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507 % |
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508 % \rail@coval : same as \rail@oval, but centered between \rail@x and |
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509 % \rail@mx |
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510 % |
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511 % \rail@frame : format \rail@box of width \rail@tmpa inside a frame |
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512 % |
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513 % \rail@cframe : same as \rail@frame, but centered between \rail@x and |
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514 % \rail@mx |
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515 % |
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516 % \rail@text : format \rail@box of width \rail@tmpa above the line |
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517 |
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518 \newbox\rail@box |
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519 |
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520 \def\rail@setbox#1{ |
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521 \setbox\rail@box\hbox{\strut#1} |
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522 \rail@tmpa=\wd\rail@box |
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523 \divide\rail@tmpa by \railunit |
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524 } |
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525 |
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526 \def\rail@oval{ |
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527 \advance\rail@x by \rail@boxlf |
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528 \rail@eline |
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529 \advance\rail@tmpa by \rail@ovalsp |
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530 \ifnum\rail@tmpa<\rail@boxht\rail@tmpa=\rail@boxht\fi |
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531 \rail@tmpb=\rail@tmpa |
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532 \divide\rail@tmpb by 2 |
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533 \advance\rail@y by -\rail@boxhht |
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534 \rail@put{\makebox(\number\rail@tmpa,\number\rail@boxht){\box\rail@box}} |
|
535 \advance\rail@y by \rail@boxhht |
|
536 \advance\rail@x by \rail@tmpb |
|
537 \rail@put{\oval(\number\rail@tmpa,\number\rail@boxht)} |
|
538 \advance\rail@x by \rail@tmpb |
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539 \rail@ex=\rail@x |
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540 \advance\rail@x by \rail@boxrt |
|
541 } |
|
542 |
|
543 \def\rail@coval{ |
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544 \rail@tmpb=\rail@tmpa |
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545 \advance\rail@tmpb by \rail@ovalsp |
|
546 \ifnum\rail@tmpb<\rail@boxht\rail@tmpb=\rail@boxht\fi |
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547 \advance\rail@tmpb by \rail@boxlf |
|
548 \advance\rail@tmpb by \rail@boxrt |
|
549 \rail@tmpc=\rail@mx |
|
550 \advance\rail@tmpc by -\rail@x |
|
551 \advance\rail@tmpc by -\rail@tmpb |
|
552 \divide\rail@tmpc by 2 |
|
553 \ifnum\rail@tmpc>0 |
|
554 \advance\rail@x by \rail@tmpc |
|
555 \fi |
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556 \rail@oval |
|
557 } |
|
558 |
|
559 \def\rail@frame{ |
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560 \advance\rail@x by \rail@boxlf |
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561 \rail@eline |
|
562 \advance\rail@tmpa by \rail@framesp |
|
563 \ifnum\rail@tmpa<\rail@boxht\rail@tmpa=\rail@boxht\fi |
|
564 \advance\rail@y by -\rail@boxhht |
|
565 \rail@put{\framebox(\number\rail@tmpa,\number\rail@boxht){\box\rail@box}} |
|
566 \advance\rail@y by \rail@boxhht |
|
567 \advance\rail@x by \rail@tmpa |
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568 \rail@ex=\rail@x |
|
569 \advance\rail@x by \rail@boxrt |
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570 } |
|
571 |
|
572 \def\rail@cframe{ |
|
573 \rail@tmpb=\rail@tmpa |
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574 \advance\rail@tmpb by \rail@framesp |
|
575 \ifnum\rail@tmpb<\rail@boxht\rail@tmpb=\rail@boxht\fi |
|
576 \advance\rail@tmpb by \rail@boxlf |
|
577 \advance\rail@tmpb by \rail@boxrt |
|
578 \rail@tmpc=\rail@mx |
|
579 \advance\rail@tmpc by -\rail@x |
|
580 \advance\rail@tmpc by -\rail@tmpb |
|
581 \divide\rail@tmpc by 2 |
|
582 \ifnum\rail@tmpc>0 |
|
583 \advance\rail@x by \rail@tmpc |
|
584 \fi |
|
585 \rail@frame |
|
586 } |
|
587 |
|
588 \def\rail@text{ |
|
589 \advance\rail@x by \rail@textlf |
|
590 \advance\rail@y by \rail@textup |
|
591 \rail@put{\box\rail@box} |
|
592 \advance\rail@y by -\rail@textup |
|
593 \advance\rail@x by \rail@tmpa |
|
594 \advance\rail@x by \rail@textrt |
|
595 } |
|
596 |
|
597 % alternatives |
|
598 % |
|
599 % \rail@jx \rail@jy : current join point |
|
600 % |
|
601 % \rail@gx \rail@gy \rail@gex \rail@grx : global versions of \rail@x etc, |
|
602 % to pass values over group closings |
|
603 % |
|
604 % \rail@mx : maximum x so far |
|
605 % |
|
606 % \rail@sy : starting \rail@y for alternatives |
|
607 % |
|
608 % \rail@jput : put at (\rail@jx,\rail@jy) |
|
609 % |
|
610 % \rail@joval[PART] : put \oval[PART] with adjust |
|
611 |
|
612 \newcount\rail@jx |
|
613 \newcount\rail@jy |
|
614 |
|
615 \newcount\rail@gx |
|
616 \newcount\rail@gy |
|
617 \newcount\rail@gex |
|
618 \newcount\rail@grx |
|
619 |
|
620 \newcount\rail@sy |
|
621 \newcount\rail@mx |
|
622 |
|
623 \def\rail@jput{ |
|
624 \put(\number\rail@jx,\number\rail@jy) |
|
625 } |
|
626 |
|
627 \def\rail@joval[#1]{ |
|
628 \advance\rail@jx by \rail@joinadj |
|
629 \rail@jput{\oval(\number\rail@joinsz,\number\rail@joinsz)[#1]} |
|
630 \advance\rail@jx by -\rail@joinadj |
|
631 } |
|
632 |
|
633 % \rail@barsplit : incoming split for '|' |
|
634 % |
|
635 % \rail@plussplit : incoming split for '+' |
|
636 % |
|
637 |
|
638 \def\rail@barsplit{ |
|
639 \advance\rail@jy by -\rail@joinhsz |
|
640 \rail@joval[tr] |
|
641 \advance\rail@jx by \rail@joinhsz |
|
642 } |
|
643 |
|
644 \def\rail@plussplit{ |
|
645 \advance\rail@jy by -\rail@joinhsz |
|
646 \advance\rail@jx by \rail@joinsz |
|
647 \rail@joval[tl] |
|
648 \advance\rail@jx by -\rail@joinhsz |
|
649 } |
|
650 |
|
651 % \rail@alt{SPLIT} : start alternatives with incoming split SPLIT |
|
652 % |
|
653 |
|
654 \def\rail@alt#1{ |
|
655 \rail@sy=\rail@y |
|
656 \rail@jx=\rail@x |
|
657 \rail@jy=\rail@y |
|
658 \advance\rail@x by \rail@joinsz |
|
659 \rail@mx=0 |
|
660 \let\rail@list=\@empty |
|
661 \let\rail@comma=\@empty |
|
662 \let\rail@split=#1 |
|
663 \begingroup |
|
664 \rail@sx=\rail@x |
|
665 \rail@rx=0 |
|
666 } |
|
667 |
|
668 % \rail@nextalt{FIX}{Y} : start next alternative at vertical position Y |
|
669 % and fix-up FIX |
|
670 % |
|
671 |
|
672 \def\rail@nextalt#1#2{ |
|
673 \global\rail@gx=\rail@x |
|
674 \global\rail@gy=\rail@y |
|
675 \global\rail@gex=\rail@ex |
|
676 \global\rail@grx=\rail@rx |
|
677 \endgroup |
|
678 #1 |
|
679 \ifnum\rail@gx>\rail@mx\rail@mx=\rail@gx\fi |
|
680 \ifnum\rail@grx>\rail@mx\rail@mx=\rail@grx\fi |
|
681 \edef\rail@list{\rail@list\rail@comma\number\rail@gex:\number\rail@gy} |
|
682 \def\rail@comma{,} |
|
683 \rail@split |
|
684 \let\rail@split=\@empty |
|
685 \rail@sety{#2} |
|
686 \rail@tmpa=\rail@jy |
|
687 \advance\rail@tmpa by -\rail@y |
|
688 \advance\rail@tmpa by -\rail@joinhsz |
|
689 \rail@jput{\line(0,-1){\number\rail@tmpa}} |
|
690 \rail@jy=\rail@y |
|
691 \advance\rail@jy by \rail@joinhsz |
|
692 \advance\rail@jx by \rail@joinhsz |
|
693 \rail@joval[bl] |
|
694 \advance\rail@jx by -\rail@joinhsz |
|
695 \rail@ex=\rail@x |
|
696 \begingroup |
|
697 \rail@sx=\rail@x |
|
698 \rail@rx=0 |
|
699 } |
|
700 |
|
701 % \rail@barjoin : outgoing join for first '|' alternative |
|
702 % |
|
703 % \rail@plusjoin : outgoing join for first '+' alternative |
|
704 % |
|
705 % \rail@altjoin : join for subsequent alternative |
|
706 % |
|
707 |
|
708 \def\rail@barjoin{ |
|
709 \ifnum\rail@y<\rail@sy |
|
710 \global\rail@gex=\rail@jx |
|
711 \else |
|
712 \global\rail@gex=\rail@ex |
|
713 \fi |
|
714 \advance\rail@jy by -\rail@joinhsz |
|
715 \rail@joval[tl] |
|
716 \advance\rail@jx by -\rail@joinhsz |
|
717 \ifnum\rail@y<\rail@sy |
|
718 \rail@altjoin |
|
719 \fi |
|
720 } |
|
721 |
|
722 \def\rail@plusjoin{ |
|
723 \global\rail@gex=\rail@ex |
|
724 \advance\rail@jy by -\rail@joinhsz |
|
725 \advance\rail@jx by -\rail@joinsz |
|
726 \rail@joval[tr] |
|
727 \advance\rail@jx by \rail@joinhsz |
|
728 } |
|
729 |
|
730 \def\rail@altjoin{ |
|
731 \rail@eline |
|
732 \rail@tmpa=\rail@jy |
|
733 \advance\rail@tmpa by -\rail@y |
|
734 \advance\rail@tmpa by -\rail@joinhsz |
|
735 \rail@jput{\line(0,-1){\number\rail@tmpa}} |
|
736 \rail@jy=\rail@y |
|
737 \advance\rail@jy by \rail@joinhsz |
|
738 \advance\rail@jx by -\rail@joinhsz |
|
739 \rail@joval[br] |
|
740 \advance\rail@jx by \rail@joinhsz |
|
741 } |
|
742 |
|
743 % \rail@eltsplit EX:Y; : split EX:Y into \rail@ex \rail@y |
|
744 % |
|
745 % \rail@endalt{JOIN} : end alternatives with outgoing join JOIN |
|
746 |
|
747 \def\rail@eltsplit#1:#2;{\rail@ex=#1\rail@y=#2} |
|
748 |
|
749 \def\rail@endalt#1{ |
|
750 \global\rail@gx=\rail@x |
|
751 \global\rail@gy=\rail@y |
|
752 \global\rail@gex=\rail@ex |
|
753 \global\rail@grx=\rail@rx |
|
754 \endgroup |
|
755 \ifnum\rail@gx>\rail@mx\rail@mx=\rail@gx\fi |
|
756 \ifnum\rail@grx>\rail@mx\rail@mx=\rail@grx\fi |
|
757 \edef\rail@list{\rail@list\rail@comma\number\rail@gex:\number\rail@gy} |
|
758 \rail@x=\rail@mx |
|
759 \rail@jx=\rail@x |
|
760 \rail@jy=\rail@sy |
|
761 \advance\rail@jx by \rail@joinsz |
|
762 \let\rail@join=#1 |
|
763 \@for\rail@elt:=\rail@list\do{ |
|
764 \expandafter\rail@eltsplit\rail@elt; |
|
765 \rail@join |
|
766 \let\rail@join=\rail@altjoin |
|
767 } |
|
768 \rail@x=\rail@mx |
|
769 \rail@y=\rail@sy |
|
770 \rail@ex=\rail@gex |
|
771 \advance\rail@x by \rail@joinsz |
|
772 } |
|
773 |
|
774 % \rail@bar : start '|' alternatives |
|
775 % |
|
776 % \rail@nextbar : next '|' alternative |
|
777 % |
|
778 % \rail@endbar : end '|' alternatives |
|
779 % |
|
780 |
|
781 \def\rail@bar{ |
|
782 \rail@alt\rail@barsplit |
|
783 } |
|
784 |
|
785 \def\rail@nextbar{ |
|
786 \rail@nextalt\relax |
|
787 } |
|
788 |
|
789 \def\rail@endbar{ |
|
790 \rail@endalt\rail@barjoin |
|
791 } |
|
792 |
|
793 % \rail@plus : start '+' alternatives |
|
794 % |
|
795 % \rail@nextplus: next '+' alternative |
|
796 % |
|
797 % \rail@endplus : end '+' alternatives |
|
798 % |
|
799 |
|
800 \def\rail@plus{ |
|
801 \rail@alt\rail@plussplit |
|
802 } |
|
803 |
|
804 \def\rail@nextplus{ |
|
805 \rail@nextalt\rail@fixplus |
|
806 } |
|
807 |
|
808 \def\rail@fixplus{ |
|
809 \ifnum\rail@gy<\rail@sy |
|
810 \begingroup |
|
811 \rail@x=\rail@gx |
|
812 \rail@y=\rail@gy |
|
813 \rail@ex=\rail@gex |
|
814 \rail@rx=\rail@grx |
|
815 \ifnum\rail@x<\rail@rx |
|
816 \rail@x=\rail@rx |
|
817 \fi |
|
818 \rail@eline |
|
819 \rail@jx=\rail@x |
|
820 \rail@jy=\rail@y |
|
821 \advance\rail@jy by \rail@joinhsz |
|
822 \rail@joval[br] |
|
823 \advance\rail@jx by \rail@joinhsz |
|
824 \rail@tmpa=\rail@sy |
|
825 \advance\rail@tmpa by -\rail@joinhsz |
|
826 \advance\rail@tmpa by -\rail@jy |
|
827 \rail@jput{\line(0,1){\number\rail@tmpa}} |
|
828 \rail@jy=\rail@sy |
|
829 \advance\rail@jy by -\rail@joinhsz |
|
830 \advance\rail@jx by \rail@joinhsz |
|
831 \rail@joval[tl] |
|
832 \advance\rail@jy by \rail@joinhsz |
|
833 \global\rail@gx=\rail@jx |
|
834 \global\rail@gy=\rail@jy |
|
835 \global\rail@gex=\rail@gx |
|
836 \global\rail@grx=\rail@rx |
|
837 \endgroup |
|
838 \fi |
|
839 } |
|
840 |
|
841 \def\rail@endplus{ |
|
842 \rail@endalt\rail@plusjoin |
|
843 } |
|
844 |
|
845 % \rail@cr{Y} : carriage return to vertical position Y |
|
846 |
|
847 \def\rail@cr#1{ |
|
848 \rail@tmpa=\rail@sx |
|
849 \advance\rail@tmpa by \rail@joinsz |
|
850 \ifnum\rail@x<\rail@tmpa\rail@x=\rail@tmpa\fi |
|
851 \rail@eline |
|
852 \rail@jx=\rail@x |
|
853 \rail@jy=\rail@y |
|
854 \advance\rail@x by \rail@joinsz |
|
855 \ifnum\rail@x>\rail@rx\rail@rx=\rail@x\fi |
|
856 \advance\rail@jy by -\rail@joinhsz |
|
857 \rail@joval[tr] |
|
858 \advance\rail@jx by \rail@joinhsz |
|
859 \rail@sety{#1} |
|
860 \rail@tmpa=\rail@jy |
|
861 \advance\rail@tmpa by -\rail@y |
|
862 \advance\rail@tmpa by -\rail@boxsp |
|
863 \advance\rail@tmpa by -\rail@joinhsz |
|
864 \rail@jput{\line(0,-1){\number\rail@tmpa}} |
|
865 \rail@jy=\rail@y |
|
866 \advance\rail@jy by \rail@boxsp |
|
867 \advance\rail@jy by \rail@joinhsz |
|
868 \advance\rail@jx by -\rail@joinhsz |
|
869 \rail@joval[br] |
|
870 \advance\rail@jy by -\rail@joinhsz |
|
871 \rail@tmpa=\rail@jx |
|
872 \advance\rail@tmpa by -\rail@sx |
|
873 \advance\rail@tmpa by -\rail@joinhsz |
|
874 \rail@jput{\line(-1,0){\number\rail@tmpa}} |
|
875 \rail@jx=\rail@sx |
|
876 \advance\rail@jx by \rail@joinhsz |
|
877 \advance\rail@jy by -\rail@joinhsz |
|
878 \rail@joval[tl] |
|
879 \advance\rail@jx by -\rail@joinhsz |
|
880 \rail@tmpa=\rail@boxsp |
|
881 \advance\rail@tmpa by -\rail@joinsz |
|
882 \rail@jput{\line(0,-1){\number\rail@tmpa}} |
|
883 \advance\rail@jy by -\rail@tmpa |
|
884 \advance\rail@jx by \rail@joinhsz |
|
885 \rail@joval[bl] |
|
886 \rail@x=\rail@jx |
|
887 \rail@ex=\rail@x |
|
888 } |