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00001 
00008 /* License: new BSD license (see NME.h) */
00009 
00010 #include "NMEPluginTOC.h"
00011 #include <stdlib.h>
00012 
00014 #define isBlankOrEol(c) ((c) == ' ' || (c) == '\t' || (c) == 10 || (c) == 13)
00015 
00016 static void switchOutputFormatTOC(HookTOCData *hookData,
00017         NMEBoolean heading);
00018 
00031 static NMEErr parHookTOC(NMEInt level,
00032         NMEInt item,
00033         NMEBoolean enter,
00034         NMEConstText markup,
00035         NMEInt srcIndex,
00036         NMEInt srcLineNumber,
00037         NMEContext *context,
00038         void *data)
00039 {
00040     HookTOCData *d = (HookTOCData *)data;
00041     
00042     if (markup[0] == '=' && level >= d->level1 && level <= d->level2)
00043         switchOutputFormatTOC(d, enter);
00044     
00045     return kNMEErrOk;
00046 }
00047 
00052 static void switchOutputFormatTOC(HookTOCData *hookData,
00053         NMEBoolean heading)
00054 {
00055     if (heading)
00056     {
00057         *hookData->outputFormat = NMEOutputFormatHTML;
00058         hookData->outputFormat->beginHeading
00059                 = "%%{l}&nbsp;%%<a href=\"#h%{o}\">%%{i>0}%{i}. %%";
00060         hookData->outputFormat->endHeading = "</a><br />\n";
00061         hookData->outputFormat->lineBreak = " ";
00062         hookData->outputFormat->beginLink = "";
00063         hookData->outputFormat->endLink = "";
00064         hookData->outputFormat->sepLink = NULL;
00065         hookData->outputFormat->beginImage = "";
00066         hookData->outputFormat->endImage = "";
00067         hookData->outputFormat->sepImage = NULL;
00068     }
00069     else
00070     {
00071         *hookData->outputFormat = NMEOutputFormatNull;
00072         hookData->outputFormat->beginDoc
00073                 = "<html>\n<body>\n<p%%{s>0} style=\"font-size:%{s}pt\"%%>\n";
00074         hookData->outputFormat->endDoc = "</p>\n</body>\n</html>\n";
00075     }
00076     hookData->outputFormat->parHookFun = parHookTOC;
00077     hookData->outputFormat->hookData = (void *)hookData;
00078 }
00079 
00080 void NMESetTOCOutputFormat(NMEOutputFormat *f, HookTOCData *d)
00081 {
00082     d->level1 = 1;
00083     d->level2 = 4;
00084     d->links = TRUE;
00085     d->outputFormat = f;
00086     switchOutputFormatTOC(d, FALSE);
00087 }
00088 
00089 NMEErr NMEPluginTOC(NMEConstText name, NMEInt nameLen,
00090         NMEConstText data, NMEInt dataLen,
00091         NMEContext *context,
00092         void *userData)
00093 {
00094     char *endp;
00095     HookTOCData hookData;
00096     NMEText title, buf, dest;
00097     NMEInt titleLen, bufLen, destLen;
00098     NMEOutputFormat outputFormat;
00099     NMEInt options, fontSize;
00100     NMEErr err;
00101     (void)name;
00102     (void)nameLen;
00103     
00104     NMESetTOCOutputFormat(&outputFormat, &hookData);
00105     
00106     // read levels in data
00107     hookData.level1 = strtol(data, &endp, 0);
00108     hookData.level2 = strtol(endp, &endp, 0);
00109     if (hookData.level1 < 1)
00110         return kNMEErrOk;
00111     if (hookData.level2 < hookData.level1)
00112         hookData.level2 = hookData.level1;
00113     
00114     // read TOC title
00115     for (title = endp; title < data + dataLen && isBlankOrEol(title[0]); title++)
00116         ;
00117     for (titleLen = dataLen - (title - data);
00118             titleLen > 0 && isBlankOrEol(title[titleLen - 1]);
00119             titleLen--)
00120         ;
00121     
00122     // make TOC
00123     NMEGetTempMemory(context, &buf, &bufLen);
00124     NMEGetFormat(context, NULL, &options, &fontSize);
00125     err = NMEProcess(((NMEPluginTocData *)userData)->src,
00126             ((NMEPluginTocData *)userData)->srcLen,
00127             buf, bufLen,
00128             options | kNMEProcessOptNoPreAndPost, "\n", &outputFormat, fontSize,
00129             &dest, &destLen, NULL);
00130     if (err != kNMEErrOk)
00131         return err;
00132     
00133     // write TOC title, if any
00134     if (titleLen > 0)
00135         if (!NMEAddString("<h2%%{s>0} style=\"font-size:%{2*s}pt\"%%>", -1, '%', context)
00136                 || !NMEAddString(title, titleLen, '\0', context)
00137                 || !NMEAddString("</h2>\n", -1, '%', context))
00138             return kNMEErrNotEnoughMemory;
00139     
00140     // write TOC to output
00141     if (!NMEAddString("<p%%{s>0} style=\"font-size:%{s}pt\"%%>\n", -1, '%', context)
00142             || !NMEAddString(dest, destLen, '\0', context)
00143             || !NMEAddString("</p>\n", -1, '%', context))
00144         return kNMEErrNotEnoughMemory;
00145     
00146     return kNMEErrOk;
00147 }