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gbffootnotes.cpp

/******************************************************************************
 *
 * gbffootnotes -       SWFilter decendant to hide or show footnotes
 *                      in a GBF module.
 */


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


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


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


GBFFootnotes::~GBFFootnotes() {
}

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

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

char GBFFootnotes::ProcessText(char *text, int maxlen, const SWKey *key, const SWModule *module)
{
        if (!option) {  // if we don't want footnotes
                char *to, *from, token[4096]; // 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;
//                              memset(token, 0, 4096);
                                token[0] = 0;
                                token[1] = 0;
                                token[2] = 0;
                                continue;
                        }
                        if (*from == '>') {     // process tokens
                                intoken = false;
                                switch (*token) {
                                case 'R':                               // Reference
                                        switch(token[1]) {
                                        case 'F':               // Begin footnote
                                                hide = true;
                                                break;
                                        case 'f':               // end footnote
                                                hide = false;
                                                break;
                                        }
                                        continue;       // skip token
                                case 'W':
                                        if (token[1] == 'T') {
                                                switch (token[2]) {
                                                case 'P':
                                                case 'S':
                                                case 'A':
                                                        continue; // remove this token
                                                default:
                                                        break;
                                                }
                                        }
                                }
                                // 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 < 4090)
                                        token[tokpos++] = *from;
                                        token[tokpos+2] = 0;    // +2 cuz we init token with 2 extra '0' because of switch statement
                        }
                        else    {
                                if (!hide) {
                                        *to++ = *from;
                                }
                        }
                }
                *to++ = 0;
                *to = 0;
        }
        return 0;
}

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