b8e7a2261f97338a614b7eed2aa6131da27510e1 chmalee Tue Sep 1 10:47:36 2020 -0700 Add bigBed support for trackDb constructed mouseOvers, refs #26160 diff --git src/hg/hgTracks/bigBedTrack.c src/hg/hgTracks/bigBedTrack.c index e45ad57..a5fa699 100644 --- src/hg/hgTracks/bigBedTrack.c +++ src/hg/hgTracks/bigBedTrack.c @@ -1,717 +1,736 @@ /* bigBed - stuff to handle loading and display of bigBed type tracks in browser. * Mostly just links to bed code, but handles a few things itself, like the dense * drawing code. */ /* Copyright (C) 2014 The Regents of the University of California * See README in this or parent directory for licensing information. */ #include "common.h" #include "hash.h" #include "linefile.h" #include "jksql.h" #include "hdb.h" #include "bedCart.h" #include "hgTracks.h" #include "hmmstats.h" #include "localmem.h" #include "wigCommon.h" #include "bbiFile.h" #include "obscure.h" #include "bigWig.h" #include "bigBed.h" #include "bigWarn.h" #include "errCatch.h" #include "trackHub.h" #include "net.h" #include "bigPsl.h" #include "bigBedFilter.h" #include "bigBedLabel.h" #include "variation.h" static unsigned getFieldNum(struct bbiFile *bbi, char *field) // get field number for field name in bigBed. errAbort if field not found. { int fieldNum = bbFieldIndex(bbi, field); if (fieldNum < 0) fieldNum = defaultFieldLocation(field); if (fieldNum < 0) errAbort("error building filter with field %s. Field not found.", field); return fieldNum; } struct bigBedFilter *bigBedMakeNumberFilter(struct cart *cart, struct bbiFile *bbi, struct trackDb *tdb, char *filter, char *defaultLimits, char *field) /* Make a filter on this column if the trackDb or cart wants us to. */ { struct bigBedFilter *ret = NULL; char *setting = trackDbSettingClosestToHome(tdb, filter); int fieldNum = getFieldNum(bbi, field); if (setting) { boolean invalid = FALSE; double minValueTdb = 0,maxValueTdb = NO_VALUE; double minLimit=NO_VALUE,maxLimit=NO_VALUE,min = minValueTdb,max = maxValueTdb; colonPairToDoubles(setting,&minValueTdb,&maxValueTdb); colonPairToDoubles(defaultLimits,&minLimit,&maxLimit); getScoreFloatRangeFromCart(cart,tdb,FALSE,filter,&minLimit,&maxLimit,&min,&max); if ((int)minLimit != NO_VALUE || (int)maxLimit != NO_VALUE) { // assume tdb default values within range! // (don't give user errors that have no consequence) if ((min != minValueTdb && (((int)minLimit != NO_VALUE && min < minLimit) || ((int)maxLimit != NO_VALUE && min > maxLimit))) || (max != maxValueTdb && (((int)minLimit != NO_VALUE && max < minLimit) || ((int)maxLimit != NO_VALUE && max > maxLimit)))) { invalid = TRUE; char value[64]; if ((int)max == NO_VALUE) // min only is allowed, but max only is not safef(value, sizeof(value), "entered minimum (%g)", min); else safef(value, sizeof(value), "entered range (min:%g and max:%g)", min, max); char limits[64]; if ((int)minLimit != NO_VALUE && (int)maxLimit != NO_VALUE) safef(limits, sizeof(limits), "violates limits (%g to %g)", minLimit, maxLimit); else if ((int)minLimit != NO_VALUE) safef(limits, sizeof(limits), "violates lower limit (%g)", minLimit); else //if ((int)maxLimit != NO_VALUE) safef(limits, sizeof(limits), "violates uppper limit (%g)", maxLimit); warn("invalid filter by %s: %s %s for track %s", field, value, limits, tdb->track); } } if (invalid) { char filterLimitName[64]; safef(filterLimitName, sizeof(filterLimitName), "%s%s", filter, _MIN); cartRemoveVariableClosestToHome(cart,tdb,FALSE,filterLimitName); safef(filterLimitName, sizeof(filterLimitName), "%s%s", filter, _MAX); cartRemoveVariableClosestToHome(cart,tdb,FALSE,filterLimitName); } else if (((int)min != NO_VALUE && ((int)minLimit == NO_VALUE || minLimit != min)) || ((int)max != NO_VALUE && ((int)maxLimit == NO_VALUE || maxLimit != max))) // Assumes min==NO_VALUE or min==minLimit is no filter // Assumes max==NO_VALUE or max==maxLimit is no filter! { AllocVar(ret); ret->fieldNum = fieldNum; if ((int)max == NO_VALUE || ((int)maxLimit != NO_VALUE && maxLimit == max)) { ret->comparisonType = COMPARE_MORE; ret->value1 = min; } else if ((int)min == NO_VALUE || ((int)minLimit != NO_VALUE && minLimit == min)) { ret->comparisonType = COMPARE_LESS; ret->value1 = max; } else { ret->comparisonType = COMPARE_BETWEEN; ret->value1 = min; ret->value2 = max; } } } return ret; } struct bigBedFilter *bigBedMakeFilterText(struct cart *cart, struct bbiFile *bbi, struct trackDb *tdb, char *filterName, char *field) /* Add a bigBed filter using a trackDb filterText statement. */ { struct bigBedFilter *filter; char *setting = trackDbSettingClosestToHome(tdb, filterName); char *value = cartUsualStringClosestToHome(cart, tdb, FALSE, filterName, setting); if (isEmpty(value)) return NULL; char *typeValue = getFilterType(cart, tdb, field, FILTERTEXT_WILDCARD); AllocVar(filter); filter->fieldNum = getFieldNum(bbi, field); if (sameString(typeValue, FILTERTEXT_REGEXP) ) { filter->comparisonType = COMPARE_REGEXP; regcomp(&filter->regEx, value, REG_NOSUB); } else { filter->comparisonType = COMPARE_WILDCARD; filter->wildCardString = cloneString(value); } return filter; } struct bigBedFilter *bigBedMakeFilterBy(struct cart *cart, struct bbiFile *bbi, struct trackDb *tdb, char *field, struct slName *choices) /* Add a bigBed filter using a trackDb filterBy statement. */ { struct bigBedFilter *filter; char *setting = getFilterType(cart, tdb, field, FILTERBY_SINGLE); AllocVar(filter); filter->fieldNum = getFieldNum(bbi, field); filter->comparisonType = COMPARE_HASH; if (setting) { if (sameString(setting, FILTERBY_SINGLE_LIST) || sameString(setting, FILTERBY_MULTIPLE_LIST_OR) || sameString(setting, FILTERBY_MULTIPLE_LIST_ONLY_OR)) filter->comparisonType = COMPARE_HASH_LIST_OR; else if (sameString(setting, FILTERBY_MULTIPLE_LIST_AND) || sameString(setting, FILTERBY_MULTIPLE_LIST_ONLY_AND)) filter->comparisonType = COMPARE_HASH_LIST_AND; } filter->valueHash = newHash(5); filter->numValuesInHash = slCount(choices); for(; choices; choices = choices->next) hashStore(filter->valueHash, choices->name); return filter; } static void addGencodeFilters(struct cart *cart, struct trackDb *tdb, struct bigBedFilter **pFilters) /* Add GENCODE custom bigBed filters. */ { struct bigBedFilter *filter; char varName[64]; struct hash *hash; /* canonical */ safef(varName, sizeof(varName), "%s.show.spliceVariants", tdb->track); boolean option = cartUsualBoolean(cart, varName, TRUE); if (!option) { AllocVar(filter); slAddHead(pFilters, filter); filter->fieldNum = 25; filter->comparisonType = COMPARE_HASH_LIST_OR; hash = newHash(5); filter->valueHash = hash; filter->numValuesInHash = 1; hashStore(hash, "canonical" ); } /* transcript class */ AllocVar(filter); slAddHead(pFilters, filter); filter->fieldNum = 20; filter->comparisonType = COMPARE_HASH; hash = newHash(5); filter->valueHash = hash; filter->numValuesInHash = 1; hashStore(hash,"coding"); // coding is always included safef(varName, sizeof(varName), "%s.show.noncoding", tdb->track); if (cartUsualBoolean(cart, varName, TRUE)) { filter->numValuesInHash++; hashStore(hash,"nonCoding"); } safef(varName, sizeof(varName), "%s.show.pseudo", tdb->track); if (cartUsualBoolean(cart, varName, FALSE)) { filter->numValuesInHash++; hashStore(hash,"pseudo"); } /* tagged sets */ safef(varName, sizeof(varName), "%s.show.set", tdb->track); char *setString = cartUsualString(cart, varName, "basic"); if (differentString(setString, "all")) { AllocVar(filter); slAddHead(pFilters, filter); filter->fieldNum = 23; filter->comparisonType = COMPARE_HASH_LIST_OR; hash = newHash(5); filter->valueHash = hash; filter->numValuesInHash = 1; hashStore(hash, setString); } } struct bigBedFilter *bigBedBuildFilters(struct cart *cart, struct bbiFile *bbi, struct trackDb *tdb) /* Build all the numeric and filterBy filters for a bigBed */ { struct bigBedFilter *filters = NULL, *filter; struct trackDbFilter *tdbFilters = tdbGetTrackNumFilters(tdb); if ((tdbFilters == NULL) && !trackDbSettingOn(tdb, "noScoreFilter")) { AllocVar(filter); slAddHead(&filters, filter); filter->fieldNum = 4; filter->comparisonType = COMPARE_MORE; char buffer[2048]; safef(buffer, sizeof buffer, "%s.scoreFilter", tdb->track); filter->value1 = cartUsualDouble(cart, buffer, 0.0); } for(; tdbFilters; tdbFilters = tdbFilters->next) { if ((filter = bigBedMakeNumberFilter(cart, bbi, tdb, tdbFilters->name, NULL, tdbFilters->fieldName)) != NULL) slAddHead(&filters, filter); } tdbFilters = tdbGetTrackTextFilters(tdb); for(; tdbFilters; tdbFilters = tdbFilters->next) { if ((filter = bigBedMakeFilterText(cart, bbi, tdb, tdbFilters->name, tdbFilters->fieldName)) != NULL) slAddHead(&filters, filter); } filterBy_t *filterBySet = filterBySetGet(tdb, cart,NULL); filterBy_t *filterBy = filterBySet; for (;filterBy != NULL; filterBy = filterBy->next) { if (filterBy->slChoices && differentString(filterBy->slChoices->name, "All")) { if ((filter = bigBedMakeFilterBy(cart, bbi, tdb, filterBy->column, filterBy->slChoices)) != NULL) slAddHead(&filters, filter); } } /* custom gencode filters */ if (startsWith("gencodeV", tdb->track)) addGencodeFilters(cart, tdb, &filters); return filters; } boolean bigBedFilterInterval(char **bedRow, struct bigBedFilter *filters) /* Go through a row and filter based on filters. Return TRUE if all filters are passed. */ { struct bigBedFilter *filter; for(filter = filters; filter; filter = filter->next) { double val = atof(bedRow[filter->fieldNum]); switch(filter->comparisonType) { case COMPARE_WILDCARD: if ( !wildMatch(filter->wildCardString, bedRow[filter->fieldNum])) return FALSE; break; case COMPARE_REGEXP: if (regexec(&filter->regEx,bedRow[filter->fieldNum], 0, NULL,0 ) != 0) return FALSE; break; case COMPARE_HASH_LIST_AND: case COMPARE_HASH_LIST_OR: { struct slName *values = commaSepToSlNames(bedRow[filter->fieldNum]); unsigned found = 0; struct hash *seenHash = newHash(3); for(; values; values = values->next) { if (hashLookup(seenHash, values->name)) continue; hashStore(seenHash, values->name); if (hashLookup(filter->valueHash, values->name)) { found++; if (filter->comparisonType == COMPARE_HASH_LIST_OR) break; } } if (filter->comparisonType == COMPARE_HASH_LIST_AND) { if (found < filter->numValuesInHash) return FALSE; } else if (!found) return FALSE; } break; case COMPARE_HASH: if (!hashLookup(filter->valueHash, bedRow[filter->fieldNum])) return FALSE; break; case COMPARE_LESS: if (!(val <= filter->value1)) return FALSE; break; case COMPARE_MORE: if (!(val >= filter->value1)) return FALSE; break; case COMPARE_BETWEEN: if (!((val >= filter->value1) && (val <= filter->value2))) return FALSE; break; } } return TRUE; } struct bbiFile *fetchBbiForTrack(struct track *track) /* Fetch bbiFile from track, opening it if it is not already open. */ { struct bbiFile *bbi = track->bbiFile; if (bbi == NULL) { char *fileName = NULL; if (track->parallelLoading) // do not use mysql during parallel fetch { fileName = cloneString(trackDbSetting(track->tdb, "bigDataUrl")); if (fileName == NULL) fileName = cloneString(trackDbSetting(track->tdb, "bigGeneDataUrl")); } else { struct sqlConnection *conn = NULL; if (!trackHubDatabase(database)) conn = hAllocConnTrack(database, track->tdb); fileName = bbiNameFromSettingOrTable(track->tdb, conn, track->table); hFreeConn(&conn); } #ifdef USE_GBIB_PWD #include "gbib.c" #endif bbi = track->bbiFile = bigBedFileOpen(fileName); } return bbi; } struct bigBedInterval *bigBedSelectRangeExt(struct track *track, char *chrom, int start, int end, struct lm *lm, int maxItems) /* Return list of intervals in range. */ { struct bigBedInterval *result = NULL; /* protect against temporary network error */ struct errCatch *errCatch = errCatchNew(); if (errCatchStart(errCatch)) { struct bbiFile *bbi = fetchBbiForTrack(track); result = bigBedIntervalQuery(bbi, chrom, start, end, maxItems + 1, lm); if (slCount(result) > maxItems) { track->limitedVis = tvDense; track->limitedVisSet = TRUE; result = NULL; AllocArray(track->summary, insideWidth); if (bigBedSummaryArrayExtended(bbi, chrom, start, end, insideWidth, track->summary)) { char *denseCoverage = trackDbSettingClosestToHome(track->tdb, "denseCoverage"); if (denseCoverage != NULL) { double endVal = atof(denseCoverage); if (endVal <= 0) { AllocVar(track->sumAll); *track->sumAll = bbiTotalSummary(bbi); } } } else freez(&track->summary); } bbiFileClose(&bbi); track->bbiFile = NULL; } errCatchEnd(errCatch); if (errCatch->gotError) { track->networkErrMsg = cloneString(errCatch->message->string); track->drawItems = bigDrawWarning; track->totalHeight = bigWarnTotalHeight; result = NULL; } errCatchFree(&errCatch); return result; } char* restField(struct bigBedInterval *bb, int fieldIdx) /* return a given field from the bb->rest field, NULL on error */ { if (fieldIdx==0) // we don't return the first(=name) field of bigBed return NULL; char *rest = cloneString(bb->rest); char *restFields[1024]; int restCount = chopTabs(rest, restFields); char *field = NULL; if (fieldIdx < restCount) field = cloneString(restFields[fieldIdx]); freeMem(rest); return field; } void bigBedAddLinkedFeaturesFromExt(struct track *track, char *chrom, int start, int end, int scoreMin, int scoreMax, boolean useItemRgb, int fieldCount, struct linkedFeatures **pLfList, int maxItems) /* Read in items in chrom:start-end from bigBed file named in track->bbiFileName, convert * them to linkedFeatures, and add to head of list. */ { struct lm *lm = lmInit(0); struct trackDb *tdb = track->tdb; struct bigBedInterval *bb, *bbList = bigBedSelectRangeExt(track, chrom, start, end, lm, maxItems); char *mouseOverField = cartOrTdbString(cart, track->tdb, "mouseOverField", NULL); // check if this track can merge large items, this setting must be allowed in the trackDb // stanza for the track, but can be enabled/disabled via trackUi/right click menu so // we also need to check the cart for the current status int mergeCount = 0; boolean doWindowSizeFilter = trackDbSettingOn(track->tdb, MERGESPAN_TDB_SETTING); if (doWindowSizeFilter) { char hasMergedItemsSetting[256]; safef(hasMergedItemsSetting, sizeof(hasMergedItemsSetting), "%s.%s", track->track, MERGESPAN_CART_SETTING); if (cartVarExists(cart, hasMergedItemsSetting)) doWindowSizeFilter = cartInt(cart, hasMergedItemsSetting) == 1; else // save the cart var so javascript can offer the right toggle cartSetInt(cart, hasMergedItemsSetting, 1); } /* protect against temporary network error */ struct bbiFile *bbi = NULL; struct errCatch *errCatch = errCatchNew(); if (errCatchStart(errCatch)) { bbi = fetchBbiForTrack(track); } errCatchEnd(errCatch); if (errCatch->gotError) { track->networkErrMsg = cloneString(errCatch->message->string); track->drawItems = bigDrawWarning; track->totalHeight = bigWarnTotalHeight; return; } errCatchFree(&errCatch); int seqTypeField = 0; if (sameString(track->tdb->type, "bigPsl")) { seqTypeField = bbExtraFieldIndex(bbi, "seqType"); } int mouseOverIdx = bbExtraFieldIndex(bbi, mouseOverField); track->bbiFile = NULL; struct bigBedFilter *filters = bigBedBuildFilters(cart, bbi, track->tdb) ; if (compositeChildHideEmptySubtracks(cart, track->tdb, NULL, NULL)) labelTrackAsHideEmpty(track); +// mouseOvers can be built constructed via trackDb settings instead +// of embedded directly in bigBed +char *mouseOverPattern = NULL; +char **fieldNames = NULL; +if (!mouseOverIdx) + { + mouseOverPattern = cartOrTdbString(cart, track->tdb, "mouseOver", NULL); + AllocArray(fieldNames, bbi->fieldCount); + struct slName *field = NULL, *fields = bbFieldNames(bbi); + int i = 0; + for (field = fields; field != NULL; field = field->next) + fieldNames[i++] = field->name; + } + // a fake item that is the union of the items that span the current window struct linkedFeatures *spannedLf = NULL; unsigned filtered = 0; for (bb = bbList; bb != NULL; bb = bb->next) { struct linkedFeatures *lf = NULL; + char *bedRow[bbi->fieldCount]; if (sameString(track->tdb->type, "bigPsl")) { char *seq, *cds; struct psl *psl = pslFromBigPsl(chromName, bb, seqTypeField, &seq, &cds); int sizeMul = pslIsProtein(psl) ? 3 : 1; boolean isXeno = 0; // just affects grayIx boolean nameGetsPos = FALSE; // we want the name to stay the name lf = lfFromPslx(psl, sizeMul, isXeno, nameGetsPos, track); lf->original = psl; if ((seq != NULL) && (lf->orientation == -1)) reverseComplement(seq, strlen(seq)); lf->extra = seq; lf->cds = cds; } else if (sameString(tdb->type, "bigDbSnp")) { // bigDbSnp does not have a score field, but I want to compute the freqSourceIx from // trackDb and settings one time instead of for each item, so I'm overloading scoreMin. int freqSourceIx = scoreMin; lf = lfFromBigDbSnp(tdb, bb, filters, freqSourceIx); } else { char startBuf[16], endBuf[16]; - char *bedRow[bbi->fieldCount]; bigBedIntervalToRow(bb, chromName, startBuf, endBuf, bedRow, ArraySize(bedRow)); if (bigBedFilterInterval(bedRow, filters)) { struct bed *bed = bedLoadN(bedRow, fieldCount); lf = bedMungToLinkedFeatures(&bed, tdb, fieldCount, scoreMin, scoreMax, useItemRgb); } if (track->visibility != tvDense && lf && doWindowSizeFilter && bb->start < winStart && bb->end > winEnd) { mergeCount++; struct bed *bed = bedLoadN(bedRow, fieldCount); struct linkedFeatures *tmp = bedMungToLinkedFeatures(&bed, tdb, fieldCount, scoreMin, scoreMax, useItemRgb); if (spannedLf) { if (tmp->start < spannedLf->start) spannedLf->start = tmp->start; if (tmp->end > spannedLf->end) spannedLf->end = tmp->end; if (fieldCount > 9) // average the colors in the merged item { struct rgbColor itemColor = colorIxToRgb(lf->filterColor); struct rgbColor currColor = colorIxToRgb(spannedLf->filterColor); int r = currColor.r + round((itemColor.r - currColor.r) / mergeCount); int g = currColor.g + round((itemColor.g - currColor.g) / mergeCount); int b = currColor.b + round((itemColor.b - currColor.b) / mergeCount); spannedLf->filterColor = MAKECOLOR_32(r,g,b); } } else { // setting the label here protects against the case when only one item would // have been merged. When this happens we warn in the track longLabel that // nothing happened and essentially make the spanned item be what the actual // item would be. If multiple items are merged then the labels and mouseOvers // will get fixed up later tmp->label = bigBedMakeLabel(track->tdb, track->labelColumns, bb, chromName); + if (mouseOverIdx > 0) tmp->mouseOver = restField(bb, mouseOverIdx); + else if (mouseOverPattern) + tmp->mouseOver = replaceFieldInPattern(mouseOverPattern, bbi->fieldCount, fieldNames, bedRow); slAddHead(&spannedLf, tmp); } continue; // lf will be NULL, but these items aren't "filtered", they're merged } } if (lf == NULL) { filtered++; continue; } if (lf->label == NULL) lf->label = bigBedMakeLabel(track->tdb, track->labelColumns, bb, chromName); if (sameString(track->tdb->type, "bigGenePred") || startsWith("genePred", track->tdb->type)) { lf->original = genePredFromBigGenePred(chromName, bb); } if (lf->mouseOver == NULL) { - char* mouseOver = restField(bb, mouseOverIdx); - lf->mouseOver = mouseOver; // leaks some memory, cloneString handles NULL ifself + if (mouseOverIdx > 0) + lf->mouseOver = restField(bb, mouseOverIdx); + else if (mouseOverPattern) + lf->mouseOver = replaceFieldInPattern(mouseOverPattern, bbi->fieldCount, fieldNames, bedRow); } slAddHead(pLfList, lf); } if (filtered) labelTrackAsFilteredNumber(track, filtered); if (doWindowSizeFilter) // add the number of merged items to the track longLabel { char labelBuf[256]; if (mergeCount > 1) safef(labelBuf, sizeof(labelBuf), " (Merged %d items)", mergeCount); else safef(labelBuf, sizeof(labelBuf), " (No Items Merged in window)"); track->longLabel = catTwoStrings(track->longLabel, labelBuf); } if (spannedLf) { // if two or more items were merged together, fix up the label of the special merged item, // otherwise the label and mouseOver will be the normal bed one char itemLabelBuf[256], mouseOver[256]; if (mergeCount > 1) { safef(itemLabelBuf, sizeof(itemLabelBuf), "Merged %d items", mergeCount); safef(mouseOver, sizeof(mouseOver), "Merged %d items. Right-click and select 'show merged items' to expand", mergeCount); spannedLf->label = cloneString(itemLabelBuf); spannedLf->name = "mergedItem"; // always, for correct hgc clicks spannedLf->mouseOver = cloneString(mouseOver); } slAddHead(pLfList, spannedLf); } lmCleanup(&lm); if (!trackDbSettingClosestToHomeOn(track->tdb, "linkIdInName")) track->itemName = bigLfItemName; bbiFileClose(&bbi); } boolean canDrawBigBedDense(struct track *tg) /* Return TRUE if conditions are such that can do the fast bigBed dense data fetch and * draw. */ { return tg->isBigBed; } void bigBedDrawDense(struct track *tg, int seqStart, int seqEnd, struct hvGfx *hvg, int xOff, int yOff, int width, MgFont *font, Color color) /* Use big-bed summary data to quickly draw bigBed. */ { struct bbiSummaryElement *summary = tg->summary; if (summary) { char *denseCoverage = trackDbSettingClosestToHome(tg->tdb, "denseCoverage"); if (denseCoverage != NULL) { double startVal = 0, endVal = atof(denseCoverage); if (endVal <= 0) { struct bbiSummaryElement sumAll = *tg->sumAll; double mean = sumAll.sumData/sumAll.validCount; double std = calcStdFromSums(sumAll.sumData, sumAll.sumSquares, sumAll.validCount); rangeFromMinMaxMeanStd(0, sumAll.maxVal, mean, std, &startVal, &endVal); } int x; for (x=0; x<width; ++x) { if (summary[x].validCount > 0) { Color color = shadesOfGray[grayInRange(summary[x].maxVal, startVal, endVal)]; hvGfxBox(hvg, x+xOff, yOff, 1, tg->heightPer, color); } } } else { int x; for (x=0; x<width; ++x) { if (summary[x].validCount > 0) { hvGfxBox(hvg, x+xOff, yOff, 1, tg->heightPer, color); } } } } freez(&tg->summary); } char *bigBedItemName(struct track *tg, void *item) // return label for simple beds { struct bed *bed = (struct bed *)item; return bed->label; } char *bigLfItemName(struct track *tg, void *item) // return label for linked features { struct linkedFeatures *lf = (struct linkedFeatures *)item; return lf->label; } void bigBedMethods(struct track *track, struct trackDb *tdb, int wordCount, char *words[]) /* Set up bigBed methods. */ { complexBedMethods(track, tdb, TRUE, wordCount, words); }