src/insets/insetcommandparams.C

   1 /**
   2  * \file insetcommandparams.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Angus Leeming
   7  *
   8  * Full author contact details are available in file CREDITS
   9  */
  10
  11 #include <config.h>
  12
  13
  14 #include "insetcommandparams.h"
  15 #include "lyxlex.h"
  16 #include "debug.h"
  17
  18 #include "support/LOstream.h"
  19
  20 using std::ostream;
  21 using std::endl;
  22
  23
  24 InsetCommandParams::InsetCommandParams()
  25 {}
  26
  27
  28 InsetCommandParams::InsetCommandParams(string const & n,
  29                                         string const & c,
  30                                         string const & o)
  31         : cmdname(n), contents(c), options(o), preview_(false)
  32 {}
  33
  34
  35 void InsetCommandParams::scanCommand(string const & cmd)
  36 {
  37         string tcmdname, toptions, tcontents;
  38
  39         if (cmd.empty()) return;
  40
  41         enum { WS, CMDNAME, OPTION, CONTENT } state = WS;
  42
  43         // Used to handle things like \command[foo[bar]]{foo{bar}}
  44         int nestdepth = 0;
  45
  46         for (string::size_type i = 0; i < cmd.length(); ++i) {
  47                 char c = cmd[i];
  48                 if ((state == CMDNAME && c == ' ') ||
  49                     (state == CMDNAME && c == '[') ||
  50                     (state == CMDNAME && c == '{')) {
  51                         state = WS;
  52                 }
  53                 if ((state == OPTION  && c == ']') ||
  54                     (state == CONTENT && c == '}')) {
  55                         if (nestdepth == 0) {
  56                                 state = WS;
  57                         } else {
  58                                 --nestdepth;
  59                         }
  60                 }
  61                 if ((state == OPTION  && c == '[') ||
  62                     (state == CONTENT && c == '{')) {
  63                         ++nestdepth;
  64                 }
  65                 switch (state) {
  66                 case CMDNAME:   tcmdname += c; break;
  67                 case OPTION:    toptions += c; break;
  68                 case CONTENT:   tcontents += c; break;
  69                 case WS:
  70                         if (c == '\\') {
  71                                 state = CMDNAME;
  72                         } else if (c == '[') {
  73                                 state = OPTION;
  74                                 nestdepth = 0; // Just to be sure
  75                         } else if (c == '{') {
  76                                 state = CONTENT;
  77                                 nestdepth = 0; // Just to be sure
  78                         }
  79                         break;
  80                 }
  81         }
  82
  83         // Don't mess with this.
  84         if (!tcmdname.empty())  setCmdName(tcmdname);
  85         if (!toptions.empty())  setOptions(toptions);
  86         if (!tcontents.empty()) setContents(tcontents);
  87
  88         if (lyxerr.debugging(Debug::PARSER))
  89                 lyxerr << "Command <" <<  cmd
  90                        << "> == <" << getCommand()
  91                        << "> == <" << getCmdName()
  92                        << '|' << getContents()
  93                        << '|' << getOptions() << '>' << endl;
  94 }
  95
  96
  97 void InsetCommandParams::read(LyXLex & lex)
  98 {
  99         string token;
 100
 101         if (lex.eatLine()) {
 102                 token = lex.getString();
 103                 scanCommand(token);
 104         } else {
 105                 lex.printError("InsetCommand: Parse error: `$$Token'");
 106         }
 107
 108         while (lex.isOK()) {
 109                 lex.next();
 110                 token = lex.getString();
 111                 if (token == "\\end_inset")
 112                         break;
 113                 if (token == "preview") {
 114                         lex.next();
 115                         preview_ = lex.getBool();
 116                 }
 117         }
 118         if (token != "\\end_inset") {
 119                 lex.printError("Missing \\end_inset at this point. "
 120                                "Read: `$$Token'");
 121         }
 122 }
 123
 124
 125 void InsetCommandParams::write(ostream & os) const
 126 {
 127         os << "LatexCommand " << getCommand() << "\n";
 128 }
 129
 130
 131 string const InsetCommandParams::getCommand() const
 132 {
 133         string s;
 134         if (!getCmdName().empty()) s += '\\' + getCmdName();
 135         if (!getOptions().empty()) s += '[' + getOptions() + ']';
 136         s += '{' + getContents() + '}';
 137         return s;
 138 }
 139
 140
 141 bool operator==(InsetCommandParams const & o1,
 142                 InsetCommandParams const & o2)
 143 {
 144         return o1.getCmdName() == o2.getCmdName()
 145                 && o1.getContents() == o2.getContents()
 146                 && o1.getOptions() == o2.getOptions()
 147                 && o1.preview() == o2.preview();
 148 }
 149
 150
 151 bool operator!=(InsetCommandParams const & o1,
 152                 InsetCommandParams const & o2)
 153 {
 154         return !(o1 == o2);
 155 }