.html
#
# framed_sdiff() is then called which creates $2.frames.html
# in the webrev tree.
#
# FYI: This function is rather unusual in its use of awk. The initial
# diff run produces conventional diff output showing changed lines mixed
# with editing codes. The changed lines are ignored - we're interested in
# the editing codes, e.g.
#
# 8c8
# 57a61
# 63c66,76
# 68,93d80
# 106d90
# 108,110d91
#
# These editing codes are parsed by the awk script and used to generate
# another awk script that generates HTML, e.g the above lines would turn
# into something like this:
#
# BEGIN { printf "\n" }
# function sp(n) {for (i=0;i%4d %s \n", n, NR, $0}
# NR==8 {wl("#7A7ADD");next}
# NR==54 {wl("#7A7ADD");sp(3);next}
# NR==56 {wl("#7A7ADD");next}
# NR==57 {wl("black");printf "\n"; next}
# : :
#
# This script is then run on the original source file to generate the
# HTML that corresponds to the source file.
#
# The two HTML files are then combined into a single piece of HTML that
# uses an HTML table construct to present the files side by side. You'll
# notice that the changes are color-coded:
#
# black - unchanged lines
# blue - changed lines
# bold blue - new lines
# brown - deleted lines
#
# Blank lines are inserted in each file to keep unchanged lines in sync
# (side-by-side). This format is familiar to users of sdiff(1) or
# Teamware's filemerge tool.
#
sdiff_to_html()
{
diff -b $1 $2 > /tmp/$$.diffs
TNAME=$3
TPATH=$4
COMMENT=$5
#
# Now we have the diffs, generate the HTML for the old file.
#
$AWK '
BEGIN {
printf "function sp(n) {for (i=0;i%%4d %%s\\n\", NR, $0}\n"
printf "function changed() "
printf "{printf \"%%4d %%s\\n\", NR, $0}\n"
printf "function bl() {printf \"%%4d %%s\\n\", NR, $0}\n"
}
/^/ {next}
/^---/ {next}
{
split($1, a, /[cad]/) ;
if (index($1, "a")) {
if (a[1] == 0) {
n = split(a[2], r, /,/);
if (n == 1)
printf "BEGIN\t\t{sp(1)}\n"
else
printf "BEGIN\t\t{sp(%d)}\n",\
(r[2] - r[1]) + 1
next
}
printf "NR==%s\t\t{", a[1]
n = split(a[2], r, /,/);
s = r[1];
if (n == 1)
printf "bl();printf \"\\n\"; next}\n"
else {
n = r[2] - r[1]
printf "bl();sp(%d);next}\n",\
(r[2] - r[1]) + 1
}
next
}
if (index($1, "d")) {
n = split(a[1], r, /,/);
n1 = r[1]
n2 = r[2]
if (n == 1)
printf "NR==%s\t\t{removed(); next}\n" , n1
else
printf "NR==%s,NR==%s\t{removed(); next}\n" , n1, n2
next
}
if (index($1, "c")) {
n = split(a[1], r, /,/);
n1 = r[1]
n2 = r[2]
final = n2
d1 = 0
if (n == 1)
printf "NR==%s\t\t{changed();" , n1
else {
d1 = n2 - n1
printf "NR==%s,NR==%s\t{changed();" , n1, n2
}
m = split(a[2], r, /,/);
n1 = r[1]
n2 = r[2]
if (m > 1) {
d2 = n2 - n1
if (d2 > d1) {
if (n > 1) printf "if (NR==%d)", final
printf "sp(%d);", d2 - d1
}
}
printf "next}\n" ;
next
}
}
END { printf "{printf \"%%4d %%s\\n\", NR, $0 }\n" }
' /tmp/$$.diffs > /tmp/$$.file1
#
# Now generate the HTML for the new file
#
$AWK '
BEGIN {
printf "function sp(n) {for (i=0;i%%4d %%s\\n\", NR, $0}\n"
printf "function changed() "
printf "{printf \"%%4d %%s\\n\", NR, $0}\n"
printf "function bl() {printf \"%%4d %%s\\n\", NR, $0}\n"
}
/^/ {next}
/^---/ {next}
{
split($1, a, /[cad]/) ;
if (index($1, "d")) {
if (a[2] == 0) {
n = split(a[1], r, /,/);
if (n == 1)
printf "BEGIN\t\t{sp(1)}\n"
else
printf "BEGIN\t\t{sp(%d)}\n",\
(r[2] - r[1]) + 1
next
}
printf "NR==%s\t\t{", a[2]
n = split(a[1], r, /,/);
s = r[1];
if (n == 1)
printf "bl();printf \"\\n\"; next}\n"
else {
n = r[2] - r[1]
printf "bl();sp(%d);next}\n",\
(r[2] - r[1]) + 1
}
next
}
if (index($1, "a")) {
n = split(a[2], r, /,/);
n1 = r[1]
n2 = r[2]
if (n == 1)
printf "NR==%s\t\t{new() ; next}\n" , n1
else
printf "NR==%s,NR==%s\t{new() ; next}\n" , n1, n2
next
}
if (index($1, "c")) {
n = split(a[2], r, /,/);
n1 = r[1]
n2 = r[2]
final = n2
d2 = 0;
if (n == 1) {
final = n1
printf "NR==%s\t\t{changed();" , n1
} else {
d2 = n2 - n1
printf "NR==%s,NR==%s\t{changed();" , n1, n2
}
m = split(a[1], r, /,/);
n1 = r[1]
n2 = r[2]
if (m > 1) {
d1 = n2 - n1
if (d1 > d2) {
if (n > 1) printf "if (NR==%d)", final
printf "sp(%d);", d1 - d2
}
}
printf "next}\n" ;
next
}
}
END { printf "{printf \"%%4d %%s\\n\", NR, $0 }\n" }
' /tmp/$$.diffs > /tmp/$$.file2
#
# Post-process the HTML files by running them back through $AWK
#
html_quote < $1 | $AWK -f /tmp/$$.file1 > /tmp/$$.file1.html
html_quote < $2 | $AWK -f /tmp/$$.file2 > /tmp/$$.file2.html
#
# Now combine into a valid HTML file and side-by-side into a table
#
print "$HTML$STDHEAD"
print "$WNAME Sdiff $TPATH/$TNAME"
print ""
print "Print this page"
print "$COMMENT
\n"
print ""
print ""
strip_unchanged /tmp/$$.file1.html
print " | "
strip_unchanged /tmp/$$.file2.html
print " | "
print "
"
print ""
framed_sdiff $TNAME $TPATH /tmp/$$.file1.html /tmp/$$.file2.html \
"$COMMENT"
}
#
# framed_sdiff
#
# Expects lefthand and righthand side html files created by sdiff_to_html.
# We use insert_anchors() to augment those with HTML navigation anchors,
# and then emit the main frame. Content is placed into:
#
# $WDIR/DIR/$TNAME.lhs.html
# $WDIR/DIR/$TNAME.rhs.html
# $WDIR/DIR/$TNAME.frames.html
#
# NOTE: We rely on standard usage of $WDIR and $DIR.
#
function framed_sdiff
{
typeset TNAME=$1
typeset TPATH=$2
typeset lhsfile=$3
typeset rhsfile=$4
typeset comments=$5
typeset RTOP
# Enable html files to access WDIR via a relative path.
RTOP=$(relative_dir $TPATH $WDIR)
# Make the rhs/lhs files and output the frameset file.
print "$HTML$STDHEAD" > $WDIR/$DIR/$TNAME.lhs.html
cat >> $WDIR/$DIR/$TNAME.lhs.html <<-EOF
$comments
EOF
cp $WDIR/$DIR/$TNAME.lhs.html $WDIR/$DIR/$TNAME.rhs.html
insert_anchors $lhsfile >> $WDIR/$DIR/$TNAME.lhs.html
insert_anchors $rhsfile >> $WDIR/$DIR/$TNAME.rhs.html
close=''
print $close >> $WDIR/$DIR/$TNAME.lhs.html
print $close >> $WDIR/$DIR/$TNAME.rhs.html
print "$FRAMEHTML$STDHEAD" > $WDIR/$DIR/$TNAME.frames.html
print "$WNAME Framed-Sdiff " \
"$TPATH/$TNAME " >> $WDIR/$DIR/$TNAME.frames.html
cat >> $WDIR/$DIR/$TNAME.frames.html <<-EOF