ff4af73ba2a52b18ce5423aae3104fae1d1a3473
hiram
  Fri Nov 20 17:25:43 2020 -0800
converted to single file for json data instead of one file for each track refs #21980

diff --git src/hg/hgTracks/hgTracks.c src/hg/hgTracks/hgTracks.c
index 9ecc41d..2fe1854 100644
--- src/hg/hgTracks/hgTracks.c
+++ src/hg/hgTracks/hgTracks.c
@@ -61,30 +61,31 @@
 #include "errCatch.h"
 #include "iupac.h"
 #include "botDelay.h"
 #include "chromInfo.h"
 #include "extTools.h"
 #include "basicBed.h"
 #include "customFactory.h"
 #include "genbank.h"
 #include "bigWarn.h"
 #include "wigCommon.h"
 #include "knetUdc.h"
 #include "hex.h"
 #include <openssl/sha.h>
 #include "customComposite.h"
 #include "chromAlias.h"
+#include "jsonWrite.h"
 
 //#include "bed3Sources.h"
 
 /* Other than submit and Submit all these vars should start with hgt.
  * to avoid weeding things out of other program's namespaces.
  * Because the browser is a central program, most of its cart
  * variables are not hgt. qualified.  It's a good idea if other
  * program's unique variables be qualified with a prefix though. */
 char *excludeVars[] = { "submit", "Submit", "dirty", "hgt.reset",
             "hgt.in1", "hgt.in2", "hgt.in3", "hgt.inBase",
             "hgt.out1", "hgt.out2", "hgt.out3", "hgt.out4",
             "hgt.left1", "hgt.left2", "hgt.left3",
             "hgt.right1", "hgt.right2", "hgt.right3",
             "hgt.dinkLL", "hgt.dinkLR", "hgt.dinkRL", "hgt.dinkRR",
             "hgt.tui", "hgt.hideAll", "hgt.visAllFromCt",
@@ -148,31 +149,39 @@
 boolean hideControls = FALSE;           /* Hide all controls? */
 boolean trackImgOnly = FALSE;           /* caller wants just the track image and track table html */
 boolean ideogramToo =  FALSE;           /* caller wants the ideoGram (when requesting just one track) */
 
 /* Structure returned from resolvePosition.
  * We use this to to expand any tracks to full
  * that were found to contain the searched-upon
  * position string */
 struct hgPositions *hgp = NULL;
 
 /* Other global variables. */
 struct group *groupList = NULL;    /* List of all tracks. */
 char *browserName;              /* Test, preview, or public browser */
 char *organization;             /* UCSC */
 
+/* mouseOver popUp global data, each track that wants to send json
+ * data will need to know the json file name from mouseOverJson
+ * and will write the track data to mouseOverJson.  The structure
+ * of the data in the json output will depend upon what the track needs
+ * to send.
+ */
 boolean enableMouseOver = FALSE;
+struct tempName *mouseOverJsonFile = NULL;
+struct jsonWrite *mouseOverJson = NULL;
 
 struct hash *trackHash = NULL; /* Hash of the tracks by their name. */
 
 #ifdef DEBUG
 void uglySnoopTrackList(int depth, struct track *trackList)
 /* Print out some info on track list. */
 {
 struct track *track;
 for (track = trackList; track != NULL; track = track->next)
     {
     if (stringIn("FaireH1h", track->track))
 	{
 	repeatCharOut(uglyOut, '+', depth);
 	}
     uglySnoopTrackList(depth+1, track->subtracks);
@@ -5031,30 +5040,41 @@
 imagePixelHeight = pixHeight;
 if (psOutput)
     {
     hvg = hvGfxOpenPostScript(pixWidth, pixHeight, psOutput);
     hvgSide = hvg; // Always only one image
     }
 else
     {
     boolean transparentImage = FALSE;
     if (theImgBox!=NULL)
         transparentImage = TRUE;   // transparent because BG (blue ruler lines) is separate image
 
     if (measureTiming)
         measureTime("Time at start of obtaining trash hgt png image file");
     trashDirFile(&pngTn, "hgt", "hgt", ".png");
+    if (enableMouseOver)
+	{   /* created here at this time to get the same name as .png file */
+        /* this file name should actually be a copy of pngTn with the suffix
+         * changed png -> json since the name does have a time element thrown
+         * in.  This name needs to be identical since the javascript only sees
+         *      the .png name and thus needs to figure out the .json name
+         */
+        /* will open this file upon successful exit to write the data */
+	AllocVar(mouseOverJsonFile);
+	trashDirFile(mouseOverJsonFile, "hgt", "hgt", ".json");
+	}
     hvg = hvGfxOpenPng(pixWidth, pixHeight, pngTn.forCgi, transparentImage);
 
     if (theImgBox)
         {
         // Adds one single image for all tracks (COULD: build the track by track images)
         theOneImg = imgBoxImageAdd(theImgBox,pngTn.forHtml,NULL,pixWidth, pixHeight,FALSE);
         theSideImg = theOneImg; // Unlkess this is overwritten below, there is a single image
         }
 
     hvgSide = hvg; // Unless this is overwritten below, there is a single image
 
     if (theImgBox && theImgBox->showPortal && withLeftLabels)
         {
         // TODO: It would be great to make the two images smaller,
         //       but keeping both the same full size for now
@@ -8680,30 +8700,34 @@
 	{
 	// TODO should be more than this. But at least this makes the same trackList mods to the other windows.
 	if (nukeIdeoFromList)
 	    {
 	    struct track *ideoTrack = chromIdeoTrack(window->trackList);
 	    if (ideoTrack)
 		{
 		slRemoveEl(&window->trackList, ideoTrack);
 		}
 	    }
 	}
 
     }
 setGlobalsFromWindow(windows); // first window // restore globals
 
+/* DBG - a message box to display information from the javascript
+hPrintf("<div id='mouseDbg'><span id='dbgMouseOver'><p>. . . dbgMouseOver</p></span></div>\n");
+ */
+
 #ifdef USE_NAVIGATION_LINKS
 hPrintf("<TABLE BORDER=0 CELLPADDING=0 width='%d'><tr style='font-size:small;'>\n",
         tl.picWidth);//min(tl.picWidth, 800));
 hPrintf("<td width='40' align='left'><a href='?hgt.left3=1' "
         "title='move 95&#37; to the left'>&lt;&lt;&lt;</a>\n");
 hPrintf("<td width='30' align='left'><a href='?hgt.left2=1' "
         "title='move 47.5&#37; to the left'>&lt;&lt;</a>\n");
 hPrintf("<td width='20' align='left'><a href='?hgt.left1=1' "
         "title='move 10&#37; to the left'>&lt;</a>\n");
 
 hPrintf("<td>&nbsp;</td>\n"); // Without width cell expands table with, forcing others to sides
 hPrintf("<td width='40' align='left'><a href='?hgt.in1=1' "
         "title='zoom in 1.5x'>&gt;&nbsp;&lt;</a>\n");
 hPrintf("<td width='60' align='left'><a href='?hgt.in2=1' "
         "title='zoom in 3x'>&gt;&gt;&nbsp;&lt;&lt;</a>\n");
@@ -9810,30 +9834,31 @@
 
 if (virtWinEnd > virtSeqBaseCount)
     {
     virtWinEnd = virtSeqBaseCount;
     }
 
 if (virtWinStart > virtSeqBaseCount)
     {
     virtWinStart = virtSeqBaseCount - 1000;
     }
 
 virtWinBaseCount = virtWinEnd - virtWinStart;
 if (virtWinBaseCount <= 0)
     hUserAbort("Window out of range on %s", virtChromName);
 
+
 if (!cartUsualBoolean(cart, "hgt.psOutput", FALSE)
  && !cartUsualBoolean(cart, "hgt.imageV1" , FALSE))
     {
 
     // TODO GALT Guidelines broken on virtChrom for 3X.
     //  works in demo0 or real chrom. Only the guidelines seem to be messed up.
     //  Other stuff works. 1X works too.
     // Since we are not using 3X for now, I will leave this for a future fix.
     // To test 3X, do make clean; make CFLAGS=-DIMAGEv2_DRAG_SCROLL_SZ=3
 
     // Start an imagebox (global for now to avoid huge rewrite of hgTracks)
     // Set up imgBox dimensions
     int sideSliceWidth  = 0;   // Just being explicit
     if (withLeftLabels)
         sideSliceWidth   = (fullInsideX - gfxBorder*3) + 2;
@@ -10540,31 +10565,42 @@
     }
 }
 
 extern boolean issueBotWarning;
 
 void doMiddle(struct cart *theCart)
 /* Print the body of an html file.   */
 {
 cart = theCart;
 measureTiming = hPrintStatus() && isNotEmpty(cartOptionalString(cart, "measureTiming"));
 if (measureTiming)
     measureTime("Startup (bottleneck %d ms) ", botDelayMillis);
 
 char *mouseOverEnabled = cfgOption("mouseOverEnabled");
 if (sameWordOk(mouseOverEnabled, "on"))
+    {
     enableMouseOver = TRUE;
+    /* mouseOverJsonFile will be initializes and created at the same
+     * time as the browser .png image file
+     */
+    mouseOverJson = jsonWriteNew();
+    jsonWriteObjectStart(mouseOverJson, NULL);
+    /* this jsonWrite structure will finish off upon successful exit.
+     * each track will start a list with the track name:
+     *   jsonWriteListStart(mouseOverJson, tg->track);
+     */
+    }
 else
     enableMouseOver = FALSE;
 
 if (issueBotWarning)
     {
     char *ip = getenv("REMOTE_ADDR");
     botDelayMessage(ip, botDelayMillis);
     }
 
 char *debugTmp = NULL;
 /* Uncomment this to see parameters for debugging. */
 /* struct dyString *state = NULL; */
 /* Initialize layout and database. */
 if (measureTiming)
     measureTime("Get cart of %d for user:%s session:%s", theCart->hash->elCount,
@@ -10660,30 +10696,31 @@
     if (!searching)     // NOT doing search
         {
         webIncludeResourceFile("jquery.contextmenu.css");
         jsIncludeFile("jquery.contextmenu.js", NULL);
         webIncludeResourceFile("ui.dropdownchecklist.css");
         jsIncludeFile("ui.dropdownchecklist.js", NULL);
         jsIncludeFile("ddcl.js", NULL);
         }
 
     hPrintf("<div id='hgTrackUiDialog' style='display: none'></div>\n");
     hPrintf("<div id='hgTracksDialog' style='display: none'></div>\n");
 
     cartFlushHubWarnings();
     }
 
+
 if (cartVarExists(cart, "chromInfoPage"))
     {
     cartRemove(cart, "chromInfoPage");
     chromInfoPage();
     }
 else if (differentString(cartUsualString(cart, TRACK_SEARCH,"0"),"0"))
     {
     doSearchTracks(groupList);
     }
 else if (sameWord(configPageCall, "configure") ||
          sameWord(configPageCall, "configure tracks and display"))
     {
     cartRemove(cart, "hgTracksConfigPage");
     configPage();
     }
@@ -10759,30 +10796,41 @@
 checkAddHighlight(); // call again in case tracksDisplay's call to resolvePosition changed vars
 char *highlightDef = cartOptionalString(cart, "highlight");
 if (highlightDef)
     jsonObjectAdd(jsonForClient, "highlight", newJsonString(highlightDef));
 jsonObjectAdd(jsonForClient, "enableHighlightingDialog",
 	      newJsonBoolean(cartUsualBoolean(cart, "enableHighlightingDialog", TRUE)));
 
 struct dyString *dy = dyStringNew(1024);
 jsonDyStringPrint(dy, (struct jsonElement *) jsonForClient, "hgTracks", 0);
 jsInline(dy->string);
 dyStringFree(&dy);
 
 dy = dyStringNew(1024);
 if (enableMouseOver)
     {
+    jsonWriteObjectEnd(mouseOverJson);
+    /* if any data was written, it is longer than 4 bytes */
+    if (strlen(mouseOverJson->dy->string) > 4)
+	{
+	FILE *trashJson = mustOpen(mouseOverJsonFile->forCgi, "w");
+	fputs(mouseOverJson->dy->string,trashJson);
+	carefulClose(&trashJson);
+	}
+
+    hPrintf("<div id='mouseOverVerticalLine' class='mouseOverVerticalLine'></div>\n");
+    hPrintf("<div id='mouseOverText' class='mouseOverText'></div>\n");
     dyStringPrintf(dy, "window.browserTextSize=%s;\n", tl.textSize);
     dyStringPrintf(dy, "window.mouseOverEnabled=true;\n");
     }
 else
     {
     dyStringPrintf(dy, "window.mouseOverEnabled=false;\n");
     }
 jsInline(dy->string);
 dyStringFree(&dy);
 
 if (measureTiming)
     measureTime("Time at end of doMiddle, next up cart write");
 
 if (cartOptionalString(cart, "udcTimeout"))
     {