46734f435d23f6919a08661b386c5a70a01a51cc
kate
  Tue Sep 25 12:00:32 2018 -0700
Add support for 'merged mode' track display.  This mode merges directional interactions by source or target, and displays as linked features (not arcs). This was originally conceived by Max, and initially implemented as the pack mode for standard interaction display, but was extended as different track display in all modes so that arcs and linked features display can be viewed concurrently, By request of JK.  refs #21917

diff --git src/hg/lib/interactUi.c src/hg/lib/interactUi.c
index 399dbe3..008fe80 100644
--- src/hg/lib/interactUi.c
+++ src/hg/lib/interactUi.c
@@ -8,38 +8,44 @@
 #include "hui.h"
 #include "trackDb.h"
 #include "interactUi.h"
 
 boolean isPopup = FALSE;
 
 boolean interactUiDirectional(struct trackDb *tdb)
 /* Determine if interactions are directional */
 {
 return isNotEmpty(trackDbSetting(tdb, INTERACT_DIRECTIONAL));
 }
 
 char *interactUiOffset(struct trackDb *tdb)
 /* Determine whether to offset source or target (or neither if NULL) */
 {
-char *directional = trackDbSetting(tdb, INTERACT_DIRECTIONAL);
-if (directional)
+char *setting = trackDbSetting(tdb, INTERACT_DIRECTIONAL);
+if (setting)
     {
-    if (sameString(directional, INTERACT_OFFSET_TARGET) ||
-         sameString(directional, INTERACT_OFFSET_SOURCE))
-                return directional;
+    char *words[8];
+    int count = chopByWhite(cloneString(setting), words, ArraySize(words));
+    if (count >= 1)
+        {
+        char *offset = words[0];
+        if (sameString(offset, INTERACT_OFFSET_TARGET) ||
+             sameString(offset, INTERACT_OFFSET_SOURCE))
+                return offset;
+        }
     }
-return FALSE;
+return NULL;
 }
 
 void interactUiMinScore(struct cart *cart, char *track, struct trackDb *tdb)
 /* Minimum score */
 {
 char buffer[1024];
 safef(buffer, sizeof buffer, "%s.%s", tdb->track, INTERACT_MINSCORE);
 int minScore = cartUsualInt(cart, buffer, 0);
 printf("<b>Minimum score:&nbsp;</b>");
 cgiMakeIntVar(buffer, minScore, 0);
 }
 
 void interactUiTrackHeight(struct cart *cart, char *track, struct trackDb *tdb)
 /* Input box to change track height */
 {
@@ -91,38 +97,92 @@
 //printf("&nbsp;%s&nbsp;", "no ends in window");
 }
 
 void interactUiDashedLines(struct cart *cart, char *track, struct trackDb *tdb)
 /* Checkbox for dashed lines on interactions in reverse direction */
 {
 if (!interactUiDirectional(tdb))
     return;
 char cartVar[1024];
 safef(cartVar, sizeof cartVar, "%s.%s", tdb->track, INTERACT_DIRECTION_DASHES);
 boolean doDashes = cartCgiUsualBoolean(cart, cartVar, INTERACT_DIRECTION_DASHES_DEFAULT);
 cgiMakeCheckBox(cartVar, doDashes);
 printf("Draw reverse direction interactions with dashed lines");
 }
 
+static char *interactMergeDefault(struct trackDb *tdb)
+/* Determine whether to merge by source or target (or neither if NULL) */
+{
+char *setting = trackDbSetting(tdb, INTERACT_DIRECTIONAL);
+if (setting)
+    {
+    char *words[8];
+    int count = chopByWhite(cloneString(setting), words, ArraySize(words));
+    if (count >= 2)
+        {
+        char *merge = words[1];
+        if (sameString(merge, INTERACT_TDB_MERGE_TARGET))
+            return INTERACT_MERGE_TARGET;
+         if (sameString(merge, INTERACT_TDB_MERGE_SOURCE))
+            return INTERACT_MERGE_SOURCE;
+        }
+    }
+return NULL;
+}
+
+char *interactUiMergeMode(struct cart *cart, char *track, struct trackDb *tdb)
+/* Get merge mode from trackDb and cart */
+{
+char *mergeDefault = interactMergeDefault(tdb);
+if (!mergeDefault)
+    return NULL;
+char *mergeMode = cartUsualStringClosestToHome(cart, tdb, isNameAtParentLevel(tdb, track),
+                                                INTERACT_MERGE, mergeDefault);
+if (sameString(INTERACT_MERGE_SOURCE, mergeMode) ||
+    sameString(INTERACT_MERGE_TARGET, mergeMode))
+        return mergeMode;
+return NULL;
+}
+
+static void interactUiSelectMergeMode(struct cart *cart, char *track, struct trackDb *tdb)
+/* Radio buttons to specify merge by source or target */
+{
+char *mergeMode = interactUiMergeMode(cart, track, tdb);
+char cartVar[1024];
+puts("<b>Merge by:</b> ");
+safef(cartVar, sizeof(cartVar), "%s.%s", track, INTERACT_MERGE);
+cgiMakeRadioButton(cartVar, INTERACT_MERGE_SOURCE, sameString(INTERACT_MERGE_SOURCE, mergeMode));
+printf("&nbsp;%s&nbsp;", "source");
+cgiMakeRadioButton(cartVar, INTERACT_MERGE_TARGET, sameString(INTERACT_MERGE_TARGET, mergeMode));
+printf("&nbsp;%s&nbsp;", "target");
+}
+
 void interactCfgUi(char *database, struct cart *cart, struct trackDb *tdb, char *track,
                         char *title, boolean boxed)
 /* Configure interact track type */
 {
 if (cartVarExists(cart, "ajax"))
     isPopup = TRUE;
 boxed = cfgBeginBoxAndTitle(tdb, boxed, title);
 if (startsWith("big", tdb->type))
     labelCfgUi(database, cart, tdb);
 //printf("\n<table id=interactControls style='font-size:%d%%' %s>\n<tr><td>",
         //isPopup ? 75 : 100, boxed ?" width='100%'":"");
 puts("<p>");
 interactUiEndpointFilter(cart, track, tdb);
 puts("</p><p>");
+if (interactUiMergeMode(cart, track, tdb))
+    {
+    interactUiSelectMergeMode(cart, track, tdb);
+    }
+else
+    {
     interactUiTrackHeight(cart, track, tdb);
     puts("</p><p>");
     interactUiDrawMode(cart, track, tdb);
     puts("</p><p>");
     interactUiDashedLines(cart, track, tdb);
     puts("</p>");
+    }
 scoreCfgUi(database, cart,tdb,tdb->track,"",1000,FALSE);
 cfgEndBox(boxed);
 }