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Directory : /usr/share/graphviz/lefty/
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Current File : /usr/share/graphviz/lefty/dotty_layout.lefty
#
# dotty_layout: layout functions and data structures
#
dotty.grablserver = function (lserver) {
    local fd;

    if (~dotty.lservers[lserver] | tablesize (dotty.lservers[lserver]) == 0) {
        if (~((fd = openio ('pipe', lserver, 'r+', '%e -Txdot')) >= 0)) {
            dotty.message (0, concat ('cannot start ', lserver));
            return null;
        }
        dotty.lservers[lserver][fd] = [
            'fd' = fd;
            'count' = 0;
        ];
    }
    for (fd in dotty.lservers[lserver]) {
        dotty.lservers[lserver][fd].count = dotty.lservers[
            lserver
        ][fd].count + 1;
        dotty.lservers.inuse[fd] = dotty.lservers[lserver][fd];
        remove (fd, dotty.lservers[lserver]);
        return fd;
    }
};
dotty.releaselserver = function (lserver, fd, state) {
    if (state == 'bad' | dotty.lservers.inuse[fd].count > 40) {
        closeio (fd, 'kill');
        remove (fd, dotty.lservers.inuse);
        return;
    }
    dotty.lservers[lserver][fd] = dotty.lservers.inuse[fd];
    remove (fd, dotty.lservers.inuse);
};
dotty.protogt.startlayout = function (gt) {
    local lpt, fd;

    if (gt.layoutpending >= 1) {
        lpt = dotty.layoutpending[gt.gtid];
        if (gt.layoutmode == 'async')
            monitor ('off', lpt.fd);
        dotty.releaselserver (gt.lserver, lpt.fd, 'bad');
        remove (gt.gtid, dotty.layoutpending);
        gt.layoutpending = 0;
        gt.haveinput = 0;
        dotty.popbusy (gt, gt.views);
    }
    if (~((fd = dotty.grablserver (gt.lserver)) >= 0))
        return null;
    dotty.pushbusy (gt, gt.views);
    writegraph (fd, gt.graph, 1);
    gt.layoutpending = 1;
    dotty.layoutpending[gt.gtid] = [
        'fd' = fd;
        'gtid' = gt.gtid;
    ];
    if (gt.layoutmode == 'async')
        monitor ('on', fd);
    return 1;
};
dotty.protogt.finishlayout = function (gt) {
    local graph, lpt, fd;

    if (~(gt.layoutpending >= 1)) {
        dotty.message (0, concat ('no layout pending for graph ', gt.gtid));
        return null;
    }
    lpt = dotty.layoutpending[gt.gtid];
    if (~(graph = readgraph (lpt.fd))) {
        if (gt.layoutmode == 'async')
            monitor ('off', lpt.fd);
        dotty.releaselserver (gt.lserver, lpt.fd, 'bad');
        if (gt.layoutpending == 2) {
            dotty.message (0, concat ('giving up on ', gt.lserver));
            if ((fd = openio ('file', 'dottybug.gv', 'w+')) >= 0) {
                writegraph (fd, gt.graph, 0);
                closeio (fd);
                dotty.message (
                    0, concat ('graph that causes ', gt.lserver)
                );
                dotty.message (
                    0, 'to fail has been saved in file dottybug.gv'
                );
                dotty.message (
                    0, 'please fill out a bug report at'
                );
                dotty.message (
                    0, 'http://www.graphviz.org/bugs/bugform.html'
                );
            }
            dotty.popbusy (gt, gt.views);
            gt.layoutpending = 0;
            gt.haveinput = 0;
            return 1;
        }
        dotty.message (
            1, concat ('lost connection to ', gt.lserver, ', restarting...')
        );
        lpt.fd = dotty.grablserver (gt.lserver);
        writegraph (lpt.fd, gt.graph, 1);
        if (gt.layoutmode == 'async')
            monitor ('on', lpt.fd);
        gt.layoutpending = 2;
        gt.haveinput = 0;
        return null;
    }
    if (gt.layoutmode == 'async')
        monitor ('off', lpt.fd);
    dotty.releaselserver (gt.lserver, lpt.fd, null);
    remove (gt.gtid, dotty.layoutpending);
    gt.layoutpending = 0;
    gt.haveinput = 0;
    gt.unpacklayout (gt, graph);
    dotty.popbusy (gt, gt.views);
    return 1;
};
dotty.protogt.cancellayout = function (gt) {
    local lpt, vid;

    if (gt.layoutpending >= 1) {
        lpt = dotty.layoutpending[gt.gtid];
        if (gt.layoutmode == 'async')
            monitor ('off', lpt.fd);
        dotty.releaselserver (gt.lserver, lpt.fd, 'bad');
        remove (gt.gtid, dotty.layoutpending);
        gt.layoutpending = 0;
        gt.haveinput = 0;
        dotty.popbusy (gt, gt.views);
    }
};
dotty.protogt.unpacklayout = function (gt, graph2) {
    local graph, gid, sgraph1, sgraph2, nid, node1, node2, eid, edge1, edge2;
    local t1, pos, size;

    graph = gt.graph;
    for (gid in graph2.graphdict) {
        if (~(sgraph1 = graph.graphs[graph.graphdict[gid]]))
            continue;
        sgraph2 = graph2.graphs[graph2.graphdict[gid]];
        sgraph1.draws = gt.unpackalldraw (gt, sgraph2.graphattr);
    }
    for (nid in graph2.nodedict) {
        if (~(node1 = graph.nodes[graph.nodedict[nid]]))
            continue;
        node2 = graph2.nodes[graph2.nodedict[nid]];
        node1.draws = gt.unpackalldraw (gt, node2.attr);
        t1 = split (node2.attr.pos, ',');
        pos = ['x' = ston (t1[0]); 'y' = ston (t1[1]);];
        size = [
            'x' = ston (node2.attr.width) * 72;
            'y' = ston (node2.attr.height) * 72;
        ];
        node1.pos = pos;
        node1.size = size;
        node1.rect = [
            0 = ['x' = pos.x - size.x / 2; 'y' = pos.y - size.y / 2;];
            1 = ['x' = pos.x + size.x / 2; 'y' = pos.y + size.y / 2;];
        ];
    }
    for (eid in graph2.edges) {
        edge2 = graph2.edges[eid];
        if (edge2.attr.id) {
            if (~(edge1 = graph.edges[ston (edge2.attr.id)]))
                continue;
        } else if (graph == graph2)
            edge1 = edge2;
        edge1.draws = gt.unpackalldraw (gt, edge2.attr);
    }
    graph.draws = gt.unpackalldraw (gt, graph2.graphattr);
    t1 = split (graph2.graphattr.bb, ',');
    graph.rect[0].x = ston (t1[0]);
    graph.rect[0].y = ston (t1[1]);
    graph.rect[1].x = ston (t1[2]);
    graph.rect[1].y = ston (t1[3]);
    if (gt.graph ~= graph2)
        return;
    # strip position and size info from the attributes
    for (gid in graph2.graphdict) {
        sgraph2 = graph2.graphs[graph2.graphdict[gid]];
        gt.removealldraw (gt, sgraph2.graphattr);
        if (sgraph2.graphattr.bb)
            remove ('bb', sgraph2.graphattr);
    }
    for (nid in graph2.nodedict) {
        node2 = graph2.nodes[graph2.nodedict[nid]];
        gt.removealldraw (gt, node2.attr);
        if (node2.attr.rects)
            remove ('rects', node2.attr);
        remove ('pos', node2.attr);
        remove ('width', node2.attr);
        remove ('height', node2.attr);
    }
    for (eid in graph2.edges) {
        edge2 = graph2.edges[eid];
        gt.removealldraw (gt, edge2.attr);
        if (edge2.attr.pos)
            remove ('pos', edge2.attr);
        if (edge2.attr.lp)
            remove ('lp', edge2.attr);
    }
    gt.removealldraw (gt, graph2.graphattr);
    remove ('bb', graph2.graphattr);
    if (graph2.graphattr.lp)
        remove ('lp', graph2.graphattr);
};
#
# draw directive parsing
#
dotty.protogt.unpackalldraw = function (gt, attr) {
    local o, did;

    o = [];
    if (attr._draw_)
        o._draw_ = gt.unpackdraw (gt, attr._draw_);
    if (attr._ldraw_)
        o._ldraw_ = gt.unpackdraw (gt, attr._ldraw_);
    if (attr._hdraw_)
        o._hdraw_ = gt.unpackdraw (gt, attr._hdraw_);
    if (attr._tdraw_)
        o._tdraw_ = gt.unpackdraw (gt, attr._tdraw_);
    if (attr._hldraw_)
        o._hldraw_ = gt.unpackdraw (gt, attr._hldraw_);
    if (attr._tldraw_)
        o._tldraw_ = gt.unpackdraw (gt, attr._tldraw_);
    for (did in o)
        if (o[did].ep) {
            o.ep = o[did].ep;
            break;
        }
    return o;
};
dotty.protogt.removealldraw = function (gt, attr) {
    if (attr._draw_)
        remove ('_draw_', attr);
    if (attr._ldraw_)
        remove ('_ldraw_', attr);
    if (attr._hdraw_)
        remove ('_hdraw_', attr);
    if (attr._tdraw_)
        remove ('_tdraw_', attr);
    if (attr._hldraw_)
        remove ('_hldraw_', attr);
    if (attr._tldraw_)
        remove ('_tldraw_', attr);
};
dotty.protogt.unpackdraw = function (gt, attr) {
    local oo, o, tt, t, n, i, j, s, l, ep;

    oo = [];
    t = split (attr, ' ', 0);
    n = tablesize (t);
    if (t[n - 1] == '') {
        remove (n - 1, t);
        n = n - 1;
    }
    i = 0;
    while (i < n) {
        o = [];
        if (t[i] == 'E') {
            o.type = t[i];
            o.c.x = ston (t[i + 1]);
            o.c.y = ston (t[i + 2]);
            o.s.x = ston (t[i + 3]);
            o.s.y = ston (t[i + 4]);
            i = i + 5;
        } else if (t[i] == 'e') {
            o.type = t[i];
            o.c.x = ston (t[i + 1]);
            o.c.y = ston (t[i + 2]);
            o.s.x = ston (t[i + 3]);
            o.s.y = ston (t[i + 4]);
            i = i + 5;
        } else if (t[i] == 'P') {
            o.type = t[i];
            o.n = ston (t[i + 1]);
            for (j = 0; j < o.n; j = j + 1) {
                o.ps[j].x = ston (t[i + 2 + j * 2]);
                o.ps[j].y = ston (t[i + 2 + j * 2 + 1]);
            }
            i = i + 2 + o.n * 2;
            o.ps[o.n] = o.ps[0];
            o.n = o.n + 1;
        } else if (t[i] == 'p') {
            o.type = t[i];
            o.n = ston (t[i + 1]);
            for (j = 0; j < o.n; j = j + 1) {
                o.ps[j].x = ston (t[i + 2 + j * 2]);
                o.ps[j].y = ston (t[i + 2 + j * 2 + 1]);
            }
            i = i + 2 + o.n * 2;
            o.ps[o.n] = o.ps[0];
            o.n = o.n + 1;
        } else if (t[i] == 'L') {
            o.type = t[i];
            o.n = ston (t[i + 1]);
            for (j = 0; j < o.n; j = j + 1) {
                o.ps[j].x = ston (t[i + 2 + j * 2]);
                o.ps[j].y = ston (t[i + 2 + j * 2 + 1]);
            }
            i = i + 2 + o.n * 2;
            if (~ep)
                ep = copy (o.ps[1]);
        } else if (t[i] == 'B') {
            o.type = t[i];
            o.n = ston (t[i + 1]);
            for (j = 0; j < o.n; j = j + 1) {
                o.ps[j].x = ston (t[i + 2 + j * 2]);
                o.ps[j].y = ston (t[i + 2 + j * 2 + 1]);
            }
            i = i + 2 + o.n * 2;
            if (~ep)
                ep = copy (o.ps[1]);
        } else if (t[i] == 'b') {
            o.type = t[i];
            o.n = ston (t[i + 1]);
            for (j = 0; j < o.n; j = j + 1) {
                o.ps[j].x = ston (t[i + 2 + j * 2]);
                o.ps[j].y = ston (t[i + 2 + j * 2 + 1]);
            }
            i = i + 2 + o.n * 2;
            if (~ep)
                ep = copy (o.ps[1]);
        } else if (t[i] == 'T') {
            o.type = t[i];
            o.p.x = ston (t[i + 1]);
            o.p.y = ston (t[i + 2]);
            o.j = ston (t[i + 3]);
            if (o.j == -1)
                o.j = 'lb';
            else if (o.j == 1)
                o.j = 'rb';
            else if (o.j == 0)
                o.j = 'cb';
            o.w = ston (t[i + 4]);
            o.n = ston (t[i + 5]);
            i = i + 6;
            s = t[i];
            i = i + 1;
            l = strlen (s) - 1;
            while (l < o.n) {
                s = concat (s, ' ', t[i]);
                l = l + 1 + strlen (t[i]);
                i = i + 1;
            }
            tt = split (s, '');
            l = tablesize (tt);
            s = '';
            for (j = 1; j < l; j = j + 1)
                s = concat (s, tt[j]);
            o.s = s;
        } else if (t[i] == 'C') {
            o.type = t[i];
            o.n = ston (t[i + 1]);
            i = i + 2;
            s = t[i];
            i = i + 1;
            l = strlen (s) - 1;
            while (l < o.n) {
                s = concat (s, ' ', t[i]);
                l = l + 1 + strlen (t[i]);
                i = i + 1;
            }
            tt = split (s, '');
            l = tablesize (tt);
            s = '';
            for (j = 1; j < l; j = j + 1)
                s = concat (s, tt[j]);
            o.fillcolor = gt.getcolor (gt.views, s);
        } else if (t[i] == 'c') {
            o.type = t[i];
            o.n = ston (t[i + 1]);
            i = i + 2;
            s = t[i];
            i = i + 1;
            l = strlen (s) - 1;
            while (l < o.n) {
                s = concat (s, ' ', t[i]);
                l = l + 1 + strlen (t[i]);
                i = i + 1;
            }
            tt = split (s, '');
            l = tablesize (tt);
            s = '';
            for (j = 1; j < l; j = j + 1)
                s = concat (s, tt[j]);
            o.drawcolor = gt.getcolor (gt.views, s);
        } else if (t[i] == 'F') {
            o.type = t[i];
            o.fs = ston (t[i + 1]);
            o.n = ston (t[i + 2]);
            i = i + 3;
            s = t[i];
            i = i + 1;
            l = strlen (s) - 1;
            while (l < o.n) {
                s = concat (s, ' ', t[i]);
                l = l + 1 + strlen (t[i]);
                i = i + 1;
            }
            tt = split (s, '');
            l = tablesize (tt);
            s = '';
            for (j = 1; j < l; j = j + 1)
                s = concat (s, tt[j]);
            o.ofn = s;
            o.fn = dotty.fontmap[s];
        } else if (t[i] == 'S') {
            o.type = t[i];
            o.n = ston (t[i + 1]);
            i = i + 2;
            s = t[i];
            i = i + 1;
            l = strlen (s) - 1;
            while (l < o.n) {
                s = concat (s, ' ', t[i]);
                l = l + 1 + strlen (t[i]);
                i = i + 1;
            }
            tt = split (s, '');
            l = tablesize (tt);
            s = '';
            for (j = 1; j < l; j = j + 1)
                s = concat (s, tt[j]);
            if (
                s == 'solid' | s == 'dashed' | s == 'dotted' |
                s == 'longdashed' | s == 'shortdashed'
            )
                o.style = s;
            else if (s == 'bold')
                o.width = 3;
            else {
                tt = split (s, '(');
                if (tt[0] == 'setlinewidth') {
                    tt = split (tt[1], ')');
                    o.width = ston (tt[0]);
                } else
                    continue;
            }
        } else if (t[i] == 'I') {
            i = i + 7;
        } else {
            dotty.message (0, concat ('draw language parser error: ', t[i]));
            return null;
        }
        oo[tablesize (oo)] = o;
    }
    oo.ep = ep;
    return oo;
};
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