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thmlfootnotes.cpp

/******************************************************************************
 *
 * thmlfootnotes -      SWFilter decendant to hide or show footnotes
 *                      in a ThML module.
 */


#include <stdlib.h>
#include <string.h>
#include <thmlfootnotes.h>
#ifndef __GNUC__
#else
#include <unixstr.h>
#endif


const char ThMLFootnotes::on[] = "On";
const char ThMLFootnotes::off[] = "Off";
const char ThMLFootnotes::optName[] = "Footnotes";
const char ThMLFootnotes::optTip[] = "Toggles Footnotes On and Off if they exist";


ThMLFootnotes::ThMLFootnotes() {
        option = false;
        options.push_back(on);
        options.push_back(off);
}


ThMLFootnotes::~ThMLFootnotes() {
}

void ThMLFootnotes::setOptionValue(const char *ival)
{
        option = (!stricmp(ival, on));
}

const char *ThMLFootnotes::getOptionValue()
{
        return (option) ? on:off;
}

char ThMLFootnotes::ProcessText(char *text, int maxlen, const SWKey *key, const SWModule *module)
{
        if (!option) {  // if we don't want footnotes
                char *to, *from, token[2048]; // cheese.  Fix.
                int tokpos = 0;
                bool intoken = false;
                int len;
                bool hide = false;

                len = strlen(text) + 1; // shift string to right of buffer
                if (len < maxlen) {
                        memmove(&text[maxlen - len], text, len);
                        from = &text[maxlen - len];
                }
                else    from = text;    // -------------------------------

                for (to = text; *from; from++) {
                        if (*from == '<') {
                                intoken = true;
                                tokpos = 0;
                                token[0] = 0;
                                token[1] = 0;
                                token[2] = 0;
                                continue;
                        }
                        if (*from == '>') {     // process tokens
                                intoken = false;
                                if (!strncmp(token, "note", 4)) {
                                  hide = true;
                                  continue;
                                }
                                else if (!strncmp(token, "/note", 5)) {
                                  hide = false;
                                  continue;
                                }

                                // if not a footnote token, keep token in text
                                if (!hide) {
                                        *to++ = '<';
                                        for (char *tok = token; *tok; tok++)
                                                *to++ = *tok;
                                        *to++ = '>';
                                }
                                continue;
                        }
                        if (intoken) {
                                if (tokpos < 2045)
                                        token[tokpos++] = *from;
                                        token[tokpos+2] = 0;
                        }
                        else    {
                                if (!hide) {
                                        *to++ = *from;
                                }
                        }
                }
                *to++ = 0;
                *to = 0;
        }
        return 0;
}

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