/*
* John M. suggests:
* You might want to add four more:
*
* _ohdraw_ (optional head-end arrow for edges)
* _ohldraw_ (optional head-end label for edges)
* _otdraw_ (optional tail-end arrow for edges)
* _otldraw_ (optional tail-end label for edges)
*
* that would be generated when an additional option is supplied to
* dot, etc. and
* these would be the arrow/label positions to use if a user want to flip the
* direction of an edge (as sometimes is there want).
*
* N.B. John M. asks:
* By the way, I don't know if you ever plan to add other letters for
* the xdot spec, but could you reserve "a" and also "A" (for attribute),
* "n" and also "N" (for numeric), "w" (for sWitch), "s" (for string)
* and "t" (for tooltip) and "x" (for position). We use those letters in
* our drawing spec (and also "<" and ">"), so if you start generating
* output with them, it could break what we have.
*/
static void
xdot_begin_graph (graph_t *g, int s_arrows, int e_arrows, format_type id)
{
int i, us;
char* s;
xd = GNEW(xdot_state_t);
if (id == FORMAT_XDOT14) {
xd->version = 14;
xd->version_s = "1.4";
}
else if (id == FORMAT_XDOT12) {
xd->version = 12;
xd->version_s = "1.2";
}
else if ((s = agget(g, "xdotversion")) && s[0] && ((us = versionStr2Version(s)) > 10)) {
xd->version = us;
xd->version_s = s;
}
else {
xd->version = versionStr2Version(XDOTVERSION);
xd->version_s = XDOTVERSION;
}
if (GD_n_cluster(g))
#ifndef WITH_CGRAPH
xd->g_draw = safe_dcl(g, g, "_draw_", "", agraphattr);
#else
xd->g_draw = safe_dcl(g, AGRAPH, "_draw_", "");
#endif
else
/*
* John M. suggests:
* You might want to add four more:
*
* _ohdraw_ (optional head-end arrow for edges)
* _ohldraw_ (optional head-end label for edges)
* _otdraw_ (optional tail-end arrow for edges)
* _otldraw_ (optional tail-end label for edges)
*
* that would be generated when an additional option is supplied to
* dot, etc. and
* these would be the arrow/label positions to use if a user want to flip the
* direction of an edge (as sometimes is there want).
*
* N.B. John M. asks:
* By the way, I don't know if you ever plan to add other letters for
* the xdot spec, but could you reserve "a" and also "A" (for attribute),
* "n" and also "N" (for numeric), "w" (for sWitch), "s" (for string)
* and "t" (for tooltip) and "x" (for position). We use those letters in
* our drawing spec (and also "<" and ">"), so if you start generating
* output with them, it could break what we have.
*/
static void
xdot_begin_graph (graph_t *g, int s_arrows, int e_arrows, format_type id)
{
int i, us;
char* s;
xd = GNEW(xdot_state_t);
if (id == FORMAT_XDOT14) {
xd->version = 14;
xd->version_s = "1.4";
}
else if (id == FORMAT_XDOT12) {
xd->version = 12;
xd->version_s = "1.2";
}
else if ((s = agget(g, "xdotversion")) && s[0] && ((us = versionStr2Version(s)) > 10)) {
xd->version = us;
xd->version_s = s;
}
else {
xd->version = versionStr2Version(XDOTVERSION);
xd->version_s = XDOTVERSION;
}
if (GD_n_cluster(g))
xd->g_draw = safe_dcl(g, AGRAPH, "_draw_", "");
else
xd->g_draw = NULL;
if (GD_has_labels(g) & GRAPH_LABEL)
xd->g_l_draw = safe_dcl(g, AGRAPH, "_ldraw_", "");
else
xd->g_l_draw = NULL;
xd->n_draw = safe_dcl(g, AGNODE, "_draw_", "");
xd->n_l_draw = safe_dcl(g, AGNODE, "_ldraw_", "");
xd->e_draw = safe_dcl(g, AGEDGE, "_draw_", "");
if (e_arrows)
xd->h_draw = safe_dcl(g, AGEDGE, "_hdraw_", "");
else
xd->h_draw = NULL;
if (s_arrows)
xd->t_draw = safe_dcl(g, AGEDGE, "_tdraw_", "");
else
xd->t_draw = NULL;
if (GD_has_labels(g) & (EDGE_LABEL|EDGE_XLABEL))
xd->e_l_draw = safe_dcl(g, AGEDGE, "_ldraw_", "");
else
xd->e_l_draw = NULL;
if (GD_has_labels(g) & HEAD_LABEL)
xd->hl_draw = safe_dcl(g, AGEDGE, "_hldraw_", "");
else
xd->hl_draw = NULL;
if (GD_has_labels(g) & TAIL_LABEL)
xd->tl_draw = safe_dcl(g, AGEDGE, "_tldraw_", "");
else
xd->tl_draw = NULL;
for (i = 0; i < NUMXBUFS; i++)
agxbinit(xbuf+i, BUFSIZ, xd->buf[i]);
}
