1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
|
/**
* @file
* Interface between Inkscape code (SPItem) and graphlayout functions.
*/
/*
* Authors:
* Tim Dwyer <Tim.Dwyer@infotech.monash.edu.au>
* Abhishek Sharma
*
* Copyright (C) 2005 Authors
*
* Released under GNU GPL. Read the file 'COPYING' for more information.
*/
#include <iostream>
#include <map>
#include <vector>
#include <algorithm>
#include <cstring>
#include <2geom/transforms.h>
#include "desktop.h"
#include "inkscape.h"
#include "sp-namedview.h"
#include "graphlayout.h"
#include "sp-item-transform.h"
#include "style.h"
#include "conn-avoid-ref.h"
#include "libavoid/router.h"
#include "libcola/cola.h"
using namespace std;
using namespace cola;
using namespace vpsc;
/**
* Returns true if item is a connector
*/
bool isConnector(SPItem const *const i) {
SPPath *path = NULL;
if(SP_IS_PATH(i)) {
path = SP_PATH(i);
}
return path && path->connEndPair.isAutoRoutingConn();
}
struct CheckProgress : TestConvergence {
CheckProgress(double d,unsigned i,list<SPItem *>&
selected,vector<Rectangle*>& rs,map<string,unsigned>& nodelookup) :
TestConvergence(d,i), selected(selected), rs(rs), nodelookup(nodelookup) {}
bool operator()(double new_stress, double* X, double* Y) {
/* This is where, if we wanted to animate the layout, we would need to update
* the positions of all objects and redraw the canvas and maybe sleep a bit
cout << "stress="<<new_stress<<endl;
cout << "x[0]="<<rs[0]->getMinX()<<endl;
for (list<SPItem *>::iterator it(selected.begin());
it != selected.end();
++it)
{
SPItem *u=*it;
if(!isConnector(u)) {
Rectangle* r=rs[nodelookup[u->id]];
Geom::Rect const item_box(sp_item_bbox_desktop(u));
Geom::Point const curr(item_box.midpoint());
Geom::Point const dest(r->getCentreX(),r->getCentreY());
sp_item_move_rel(u, Geom::Translate(dest - curr));
}
}
*/
return TestConvergence::operator()(new_stress,X,Y);
}
list<SPItem *>& selected;
vector<Rectangle*>& rs;
map<string,unsigned>& nodelookup;
};
/**
* Scans the items list and places those items that are
* not connectors in filtered
*/
void filterConnectors(std::vector<SPItem*> const &items, list<SPItem *> &filtered) {
for(std::vector<SPItem*>::const_iterator i = items.begin();i !=items.end(); ++i){
SPItem *item = *i;
if(!isConnector(item)) {
filtered.push_back(item);
}
}
}
/**
* Takes a list of inkscape items, extracts the graph defined by
* connectors between them, and uses graph layout techniques to find
* a nice layout
*/
void graphlayout(std::vector<SPItem*> const &items) {
if(items.empty()) {
return;
}
list<SPItem *> selected;
filterConnectors(items,selected);
if (selected.empty()) return;
const unsigned n=selected.size();
//Check 2 or more selected objects
if (n < 2) return;
// add the connector spacing to the size of node bounding boxes
// so that connectors can always be routed between shapes
SPDesktop* desktop = SP_ACTIVE_DESKTOP;
double spacing = 0;
if(desktop) spacing = desktop->namedview->connector_spacing+0.1;
map<string,unsigned> nodelookup;
vector<Rectangle*> rs;
vector<Edge> es;
for (list<SPItem *>::iterator i(selected.begin());
i != selected.end();
++i)
{
SPItem *u=*i;
Geom::OptRect const item_box = u->desktopVisualBounds();
if(item_box) {
Geom::Point ll(item_box->min());
Geom::Point ur(item_box->max());
nodelookup[u->getId()]=rs.size();
rs.push_back(new Rectangle(ll[0]-spacing,ur[0]+spacing,
ll[1]-spacing,ur[1]+spacing));
} else {
// I'm not actually sure if it's possible for something with a
// NULL item-box to be attached to a connector in which case we
// should never get to here... but if such a null box can occur it's
// probably pretty safe to simply ignore
//fprintf(stderr,"NULL item_box found in graphlayout, ignoring!\n");
}
}
Inkscape::Preferences *prefs = Inkscape::Preferences::get();
SimpleConstraints scx,scy;
double ideal_connector_length = prefs->getDouble("/tools/connector/length", 100.0);
double directed_edge_height_modifier = 1.0;
bool directed = prefs->getBool("/tools/connector/directedlayout");
bool avoid_overlaps = prefs->getBool("/tools/connector/avoidoverlaplayout");
for (list<SPItem *>::iterator i(selected.begin());
i != selected.end();
++i)
{
SPItem *iu=*i;
map<string,unsigned>::iterator i_iter=nodelookup.find(iu->getId());
map<string,unsigned>::iterator i_iter_end=nodelookup.end();
if(i_iter==i_iter_end) {
continue;
}
unsigned u=i_iter->second;
std::vector<SPItem *> nlist=iu->avoidRef->getAttachedConnectors(Avoid::runningFrom);
list<SPItem *> connectors;
connectors.insert(connectors.end(), nlist.begin(), nlist.end());
for (list<SPItem *>::iterator j(connectors.begin());
j != connectors.end();
++j) {
SPItem *conn=*j;
SPItem *iv;
SPItem *items[2];
assert(isConnector(conn));
SP_PATH(conn)->connEndPair.getAttachedItems(items);
if(items[0]==iu) {
iv=items[1];
} else {
iv=items[0];
}
if (iv == NULL) {
// The connector is not attached to anything at the
// other end so we should just ignore it.
continue;
}
// If iv not in nodelookup we again treat the connector
// as disconnected and continue
map<string,unsigned>::iterator v_pair=nodelookup.find(iv->getId());
if(v_pair!=nodelookup.end()) {
unsigned v=v_pair->second;
//cout << "Edge: (" << u <<","<<v<<")"<<endl;
es.push_back(make_pair(u,v));
if(conn->style->marker_end.set) {
if(directed && strcmp(conn->style->marker_end.value,"none")) {
scy.push_back(new SimpleConstraint(v, u,
(ideal_connector_length * directed_edge_height_modifier)));
}
}
}
}
}
const unsigned E = es.size();
double eweights[E];
fill(eweights,eweights+E,1);
vector<Component*> cs;
connectedComponents(rs,es,scx,scy,cs);
for(unsigned i=0;i<cs.size();i++) {
Component* c=cs[i];
if(c->edges.size()<2) continue;
CheckProgress test(0.0001,100,selected,rs,nodelookup);
ConstrainedMajorizationLayout alg(c->rects,c->edges,eweights,ideal_connector_length,test);
alg.setupConstraints(NULL,NULL,avoid_overlaps,
NULL,NULL,&c->scx,&c->scy,NULL,NULL);
alg.run();
}
separateComponents(cs);
for (list<SPItem *>::iterator it(selected.begin());
it != selected.end();
++it)
{
SPItem *u=*it;
if(!isConnector(u)) {
map<string,unsigned>::iterator i=nodelookup.find(u->getId());
if(i!=nodelookup.end()) {
Rectangle* r=rs[i->second];
Geom::OptRect item_box = u->desktopVisualBounds();
if (item_box) {
Geom::Point const curr(item_box->midpoint());
Geom::Point const dest(r->getCentreX(),r->getCentreY());
sp_item_move_rel(u, Geom::Translate(dest - curr));
}
}
}
}
for(unsigned i=0;i<scx.size();i++) {
delete scx[i];
}
for(unsigned i=0;i<scy.size();i++) {
delete scy[i];
}
for(unsigned i=0;i<rs.size();i++) {
delete rs[i];
}
}
// vim: set cindent
// vim: ts=4 sw=4 et tw=0 wm=0
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :
|