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Commit6513633

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Add support for wrapping to psql's "extended" mode. This makes it very
feasible to display tables that have both many columns and some largedata in some columns (such as pg_stats).Emre Hasegeli with review and rewriting from Sergey Muraviov andreviewed by Greg Stark
1 parentd272244 commit6513633

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3 files changed

+1222
-23
lines changed

3 files changed

+1222
-23
lines changed

‎src/bin/psql/print.c

Lines changed: 158 additions & 23 deletions
Original file line numberDiff line numberDiff line change
@@ -1161,6 +1161,7 @@ print_aligned_vertical(const printTableContent *cont, FILE *fout)
11611161
structlineptr*hlineptr,
11621162
*dlineptr;
11631163
boolis_pager= false;
1164+
intoutput_columns=0;/* Width of interactive console */
11641165

11651166
if (cancel_pressed)
11661167
return;
@@ -1234,24 +1235,86 @@ print_aligned_vertical(const printTableContent *cont, FILE *fout)
12341235
fprintf(fout,"%s\n",cont->title);
12351236
}
12361237

1238+
/*
1239+
* Choose target output width: \pset columns, or $COLUMNS, or ioctl
1240+
*/
1241+
if (cont->opt->columns>0)
1242+
output_columns=cont->opt->columns;
1243+
elseif ((fout==stdout&&isatty(fileno(stdout)))||is_pager)
1244+
{
1245+
if (cont->opt->env_columns>0)
1246+
output_columns=cont->opt->env_columns;
1247+
#ifdefTIOCGWINSZ
1248+
else
1249+
{
1250+
structwinsizescreen_size;
1251+
1252+
if (ioctl(fileno(stdout),TIOCGWINSZ,&screen_size)!=-1)
1253+
output_columns=screen_size.ws_col;
1254+
}
1255+
#endif
1256+
}
1257+
1258+
if (cont->opt->format==PRINT_WRAPPED)
1259+
{
1260+
/* Calculate the available width to wrap the columns to after
1261+
* subtracting the maximum header width and separators. At a minimum
1262+
* enough to print "[ RECORD N ]" */
1263+
unsignedintwidth,swidth;
1264+
1265+
if (opt_border==0)
1266+
swidth=1;/* "header data" */
1267+
elseif (opt_border==1)
1268+
swidth=3;/* "header | data" */
1269+
elseif (opt_border>1)
1270+
swidth=7;/* "| header | data |" */
1271+
1272+
/* Wrap to maximum width */
1273+
width=dwidth+swidth+hwidth;
1274+
if ((output_columns>0)&& (width>output_columns))
1275+
{
1276+
dwidth=output_columns-hwidth-swidth;
1277+
width=output_columns;
1278+
}
1279+
1280+
/* Wrap to minimum width */
1281+
if (!opt_tuples_only)
1282+
{
1283+
intdelta=1+log10(cont->nrows)-width;
1284+
if (opt_border==0)
1285+
delta+=6;/* "* RECORD " */
1286+
elseif (opt_border==1)
1287+
delta+=10;/* "-[ RECORD ]" */
1288+
elseif (opt_border==2)
1289+
delta+=15;/* "+-[ RECORD ]-+" */
1290+
1291+
if (delta>0)
1292+
dwidth+=delta;
1293+
}
1294+
elseif (dwidth<3)
1295+
dwidth=3;
1296+
}
1297+
12371298
/* print records */
12381299
for (i=0,ptr=cont->cells;*ptr;i++,ptr++)
12391300
{
12401301
printTextRulepos;
1241-
intline_count,
1302+
intdline,
1303+
hline,
12421304
dcomplete,
1243-
hcomplete;
1305+
hcomplete,
1306+
offset,
1307+
chars_to_output;
12441308

12451309
if (cancel_pressed)
12461310
break;
12471311

12481312
if (i==0)
12491313
pos=PRINT_RULE_TOP;
1250-
elseif (!(*(ptr+1)))
1251-
pos=PRINT_RULE_BOTTOM;
12521314
else
12531315
pos=PRINT_RULE_MIDDLE;
12541316

1317+
/* Print record header (e.g. "[ RECORD N ]") above each record */
12551318
if (i %cont->ncolumns==0)
12561319
{
12571320
if (!opt_tuples_only)
@@ -1270,48 +1333,120 @@ print_aligned_vertical(const printTableContent *cont, FILE *fout)
12701333
pg_wcsformat((constunsignedchar*)*ptr,strlen(*ptr),encoding,
12711334
dlineptr,dheight);
12721335

1273-
line_count=0;
1336+
/* Loop through header and data in parallel dealing with newlines and
1337+
* wrapped lines until they're both exhausted */
1338+
dline=hline=0;
12741339
dcomplete=hcomplete=0;
1340+
offset=0;
1341+
chars_to_output=dlineptr[dline].width;
12751342
while (!dcomplete|| !hcomplete)
12761343
{
1344+
/* Left border */
12771345
if (opt_border==2)
1278-
fprintf(fout,"%s ",dformat->leftvrule);
1346+
fprintf(fout,"%s",dformat->leftvrule);
1347+
1348+
/* Header (never wrapped so just need to deal with newlines) */
12791349
if (!hcomplete)
12801350
{
1281-
fprintf(fout,"%-s%*s",hlineptr[line_count].ptr,
1282-
hwidth-hlineptr[line_count].width,"");
1351+
intswidth,twidth=hwidth+1;
1352+
fputs(hline?format->header_nl_left:" ",fout);
1353+
strlen_max_width((char*)hlineptr[hline].ptr,&twidth,
1354+
encoding);
1355+
fprintf(fout,"%-s",hlineptr[hline].ptr);
1356+
1357+
swidth=hwidth-twidth;
1358+
if (swidth>0)/* spacer */
1359+
fprintf(fout,"%*s",swidth," ");
12831360

1284-
if (!hlineptr[line_count+1].ptr)
1361+
if (hlineptr[hline+1].ptr)
1362+
{
1363+
/* More lines after this one due to a newline */
1364+
fputs(format->header_nl_right,fout);
1365+
hline++;
1366+
}
1367+
else
1368+
{
1369+
/* This was the last line of the header */
1370+
fputs(" ",fout);
12851371
hcomplete=1;
1372+
}
12861373
}
12871374
else
1288-
fprintf(fout,"%*s",hwidth,"");
1375+
{
1376+
/* Header exhausted but more data for column */
1377+
fprintf(fout,"%*s",hwidth+2,"");
1378+
}
12891379

1380+
/* Separator */
12901381
if (opt_border>0)
1291-
fprintf(fout," %s ",dformat->midvrule);
1292-
else
1293-
fputc(' ',fout);
1382+
{
1383+
if (offset)
1384+
fputs(format->midvrule_wrap,fout);
1385+
elseif (!dline)
1386+
fputs(dformat->midvrule,fout);
1387+
elseif (dline)
1388+
fputs(format->midvrule_nl,fout);
1389+
else
1390+
fputs(format->midvrule_blank,fout);
1391+
}
12941392

1393+
/* Data */
12951394
if (!dcomplete)
12961395
{
1297-
if (opt_border<2)
1298-
fprintf(fout,"%s\n",dlineptr[line_count].ptr);
1299-
else
1300-
fprintf(fout,"%-s%*s %s\n",dlineptr[line_count].ptr,
1301-
dwidth-dlineptr[line_count].width,"",
1302-
dformat->rightvrule);
1396+
inttarget_width,
1397+
bytes_to_output,
1398+
swidth;
1399+
1400+
fputs(!dcomplete&& !offset?" ":format->wrap_left,fout);
13031401

1304-
if (!dlineptr[line_count+1].ptr)
1402+
target_width=dwidth;
1403+
bytes_to_output=strlen_max_width(dlineptr[dline].ptr+offset,
1404+
&target_width,encoding);
1405+
fputnbytes(fout, (char*)(dlineptr[dline].ptr+offset),
1406+
bytes_to_output);
1407+
1408+
chars_to_output-=target_width;
1409+
offset+=bytes_to_output;
1410+
1411+
/* spacer */
1412+
swidth=dwidth-target_width;
1413+
if (swidth>0)
1414+
fprintf(fout,"%*s",swidth,"");
1415+
1416+
if (chars_to_output)
1417+
{
1418+
/* continuing a wrapped column */
1419+
fputs(format->wrap_right,fout);
1420+
}
1421+
elseif (dlineptr[dline+1].ptr)
1422+
{
1423+
/* reached a newline in the column */
1424+
fputs(format->nl_right,fout);
1425+
dline++;
1426+
offset=0;
1427+
chars_to_output=dlineptr[dline].width;
1428+
}
1429+
else
1430+
{
1431+
/* reached the end of the cell */
1432+
fputs(" ",fout);
13051433
dcomplete=1;
1434+
}
1435+
1436+
if (opt_border==2)
1437+
fputs(dformat->rightvrule,fout);
1438+
1439+
fputs("\n",fout);
13061440
}
13071441
else
13081442
{
1443+
/* data exhausted (this can occur if header is longer than the
1444+
* data due to newlines in the header) */
13091445
if (opt_border<2)
1310-
fputc('\n',fout);
1446+
fputs("\n",fout);
13111447
else
1312-
fprintf(fout,"%*s %s\n",dwidth,"",dformat->rightvrule);
1448+
fprintf(fout,"%*s%s\n",dwidth,"",dformat->rightvrule);
13131449
}
1314-
line_count++;
13151450
}
13161451
}
13171452

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