/* Stuff for the contig track. */

/* Copyright (C) 2013 The Regents of the University of California 
 * See kent/LICENSE or http://genome.ucsc.edu/license/ for licensing information. */

#include "common.h"
#include "hash.h"
#include "linefile.h"
#include "jksql.h"
#include "hdb.h"
#include "hgTracks.h"
#include "ctgPos.h"

static void contigLoad(struct track *tg)
/* Load up contigs from database table to track items. */
{
char query[256];
struct sqlConnection *conn = hAllocConn(database);
struct sqlResult *sr = NULL;
char **row;
struct ctgPos *ctgList = NULL, *ctg;

/* Get the contigs and load into tg->items. */
sqlSafef(query, sizeof query, "select * from %s where chrom = '%s' and chromStart<%u and chromEnd>%u",
    tg->table, chromName, winEnd, winStart);
sr = sqlGetResult(conn, query);
while ((row = sqlNextRow(sr)) != NULL)
    {
    ctg = ctgPosLoad(row);
    slAddHead(&ctgList, ctg);
    }
slReverse(&ctgList);
sqlFreeResult(&sr);
hFreeConn(&conn);
tg->items = ctgList;
}

static char *abbreviateContig(char *string, MgFont *font, int width)
/* Return a string abbreviated enough to fit into space. */
{
int textWidth;

/* If have enough space, return original unabbreviated string. */
textWidth = mgFontStringWidth(font, string);
if (textWidth <= width)
    return string;

/* Try skipping over 'ctg' */
string += 3;
textWidth = mgFontStringWidth(font, string);
if (textWidth <= width)
    return string;
return NULL;
}

static void contigDraw(struct track *tg, int seqStart, int seqEnd,
        struct hvGfx *hvg, int xOff, int yOff, int width, 
        MgFont *font, Color color, enum trackVisibility vis)
/* Draw contig items. */
{
struct ctgPos *ctg;
int y = yOff;
int heightPer = tg->heightPer;
int lineHeight = tg->lineHeight;
int x1,x2,w;
boolean isFull = (vis == tvFull);
int ix = 0;
char *s;
double scale = scaleForPixels(width);
for (ctg = tg->items; ctg != NULL; ctg = ctg->next)
    {
    x1 = round((double)((int)ctg->chromStart-winStart)*scale) + xOff;
    x2 = round((double)((int)ctg->chromEnd-winStart)*scale) + xOff;
    /* Clip here so that text will tend to be more visible... */
    if (x1 < xOff)
	x1 = xOff;
    if (x2 > xOff + width)
	x2 = xOff + width;
    w = x2-x1;
    if (w < 1)
	w = 1;
    hvGfxBox(hvg, x1, y, w, heightPer, color);
    s = abbreviateContig(ctg->contig, tl.font, w);
    if (s != NULL)
	hvGfxTextCentered(hvg, x1, y, w, heightPer, MG_WHITE, tl.font, s);
    if (isFull)
	y += lineHeight;
    else 
	{
	mapBoxHc(hvg, ctg->chromStart, ctg->chromEnd, x1,y,w,heightPer, tg->track, 
	    tg->mapItemName(tg, ctg), 
	    tg->itemName(tg, ctg));
	}
    ++ix;
    }
}

static void contigFree(struct track *tg)
/* Free up contigTrackGroup items. */
{
ctgPosFreeList((struct ctgPos**)&tg->items);
}

static char *contigName(struct track *tg, void *item)
/* Return name of contig track item. */
{
struct ctgPos *ctg = item;
return ctg->contig;
}

static int contigItemStart(struct track *tg, void *item)
/* Return start of contig track item. */
{
struct ctgPos *ctg = item;
return ctg->chromStart;
}

static int contigItemEnd(struct track *tg, void *item)
/* Return end of contig track item. */
{
struct ctgPos *ctg = item;
return ctg->chromEnd;
}

void contigMethods(struct track *tg)
/* Make track for contig */
{
tg->loadItems = contigLoad;
tg->freeItems = contigFree;
tg->drawItems = contigDraw;
tg->itemName = contigName;
tg->mapItemName = contigName;
tg->totalHeight = tgFixedTotalHeightNoOverflow;
tg->itemHeight = tgFixedItemHeight;
tg->itemStart = contigItemStart;
tg->itemEnd = contigItemEnd;
}