pdfhscript

#!/bin/sh
#
# external script for hovacui
#
# l:	show annotation and actions in the current page in a browser
# s:	save the document
# A,N:	add or edit notes in filename-notes.txt
#	A: add a note for the current page
#	N: edit the notes for the current page if some exist
# E:	create a modified document

# arguments

KEY="$1"
ID="$2"
FILE="$3"
PAGE="$4"
BOXNUMBER="$5"
SCROLLX="$6"
SCROLLY="$7"
TOTPAGES="$8"
TEXTBOX="$9"
DEST="${10}"
RECT="${11}"

# actions required by multiple keystrokes

[ "$KEY" = 'A' ] && EDIT=true
[ "$KEY" = 'N' ] && EDIT=true
$EDIT false && [ "$RECT" != "[]" ] && YANK=true
[ "$KEY" = 'y' ] && YANK=true && COPIED=true

# test

if [ "$KEY" = '0' ];		# test echo and move
then
	if [ $PAGE = $TOTPAGES ];
	then
		echo -n "last page"
		exit 0
	else
		echo "$((PAGE+1)) 0 0 0"
		exit 1
	fi
elif echo "$KEY" | grep -q '^[123]$';	# test reload
then
	# same position
	[ "$KEY" = '1' ] && echo "$PAGE $BOXNUMBER $SCROLLX $SCROLLY"
	# new position
	[ "$KEY" = '2' ] && echo "2 $BOXNUMBER $SCROLLX $SCROLLY"
	# read position from cache file, if enabled and existing
	[ "$KEY" = '3' ] && echo "-1 0 0 0"
	if echo "$FILE" | grep -q edit-1.pdf;
	then
		echo ${FILE%%-edit-1.pdf}.pdf
	else
		echo ${FILE%%.pdf}-edit-1.pdf
	fi
	exit 1
fi

# links in page

if [ "$KEY" = 'l' ];
then
	pdfannot -w -d "$FILE" $PAGE > hovacui-out.html
	[ $? = 0 ] && rm hovacui-out.html && \
		echo -n "no links in page" && exit

	if [ "$DISPLAY" = "" ];
	then
		elinks -remote 'openUrl(file:./hovacui-out.html,new-tab)' \
			> /dev/null 2>&1
		[ $? != 0 ] && echo -n "elinks not running" && exit
		elinks -remote 'reload()'
		echo -n "passed links to elinks"
		exit
	fi

	if [ "$BROWSER" != "" ];
	then
		$BROWSER hovacui-out.html &
		echo -n "passed links to $BROWSER"
		exit
	fi

	echo -n "no browser available"
	exit
fi

# save a copy of the document

if [ "$KEY" = 's' ];
then
	I=1
	while [ -e selection-$I.pdf ];
	do
		I=$((I+1))
	done

	cp "$FILE" selection-$I.pdf
	echo -n "saved as selection-$I.pdf"
	exit
fi

# interactively operate on the selected rectangle

if [ "$KEY" = 'E' ];
then
	which pdfinteractive > /dev/null || \
		{ echo -n 'pdfinteractive not installed'; exit; }
	which pdfdrawover > /dev/null || \
		{ echo -n 'pdfdrawover not installed'; exit; }
	if [ "$DISPLAY" = '' ];
	then
		pdfinteractive "$@" 3>&1 > /dev/tty
	else
		xterm -e pdfinteractive "$@" 3>&1
	fi
	A=$(cat pdfinteractive-ret.txt)
	rm -f pdfinteractive-ret.txt
	exit $A
fi

# copy text in page or rectangle for pasting

if $YANK false;
then
	if [ "$RECT" != "[]" ];
	then
		BOX="-b $RECT"
	else
		T=$(echo $TEXTBOX | tr - , | tr -d '[]')
		TX1=$(echo $T | cut -d, -f1 | cut -d. -f1)
		TY1=$(echo $T | cut -d, -f2 | cut -d. -f1)
		TX2=$(echo $T | cut -d, -f3 | cut -d. -f1)
		TY2=$(echo $T | cut -d, -f4 | cut -d. -f1)
		D=$(echo $DEST | tr - , | tr -d '[]')
		DX1=$(echo $D | cut -d, -f1 | cut -d. -f1)
		DY1=$(echo $D | cut -d, -f2 | cut -d. -f1)
		DX2=$(echo $D | cut -d, -f3 | cut -d. -f1)
		DY2=$(echo $D | cut -d, -f4 | cut -d. -f1)
		BOX="-b ["
		BOX=$BOX$([ $TX1 -gt $DX1 ] && echo $TX1 || echo $DX1),
		BOX=$BOX$([ $TY1 -gt $DY1 ] && echo $TY1 || echo $DY1)-
		BOX=$BOX$([ $TX2 -lt $DX2 ] && echo $TX2 || echo $DX2),
		BOX=$BOX$([ $TY2 -lt $DY2 ] && echo $TY2 || echo $DY2)]
	fi
	pdftoroff -t -i $PAGE:$PAGE $BOX "$FILE" | \
	sed '/./,$ ! d' | $COPIER 2>&1 > /dev/null
	[ "$?" = 0 ] && $COPIED false && echo -n "text copied" && exit;
fi

# edit the notes of the pdf file

if $EDIT false;
then
	BASE=$(echo "$FILE" | sed -e 's,.pdf,,' -e 's,$,-notes.txt,')

	[ "$KEY" = 'N' ] && CHECK=true

	if [ -e "$BASE" ];
	then
		if ! [ -f "$BASE" ];
		then
			echo -n "$BASE is not a regular file"
			exit
		fi
		if $CHECK false && \
		   grep -A2 "^## Page $PAGE$" "$BASE" | tail -2 | grep -q "^##";
		then
			echo -n "no notes for page $PAGE, next: "
			sed '
			: begin
				/\n##/	{ P; D; b }
					s,\n, ,g
					N
					b begin
			' "$BASE"					| \
			sed -n "/^## Page $PAGE /,$ p"			| \
			{ grep -m1 '## Page [0-9]* .' || echo '  none'; } | \
			cut -d' ' -f3					| \
			tr -d '\n'
			exit
		fi
	else
		if $CHECK false;
		then
			echo -n "no notes for page $PAGE"
			exit
		fi
		echo "# $(basename "$FILE")" > "$BASE"
		echo >> "$BASE"
		for P in $(seq 1 $TOTPAGES);
		do
			echo "## Page $P" >> "$BASE"
			echo >> "$BASE"
		done
		echo '## End' >> "$BASE"
	fi

	LINEFILE=$HOME/.cache/hovacui/line
	rm -f $FILELINE
	vi +"/## Page $PAGE$" "$BASE" > /dev/tty
	setterm --cursor off > /dev/tty
	if [ -f $LINEFILE ];
	then
		# requires, in .vimrc:
		# autocmd BufUnload *-notes.txt execute ''
		#   \| execute '!echo ' . line('.') . ' >
		#      $HOME/.cache/hovacui/line'
		L=$(cat $LINEFILE)
		[ "$L" = "" ] && rm -f $LINEFILE && exit 0
		N=$(head -n "$L" "$BASE" | grep '^## Page [0-9][0-9]*' | \
		    tail -1 | cut -d' ' -f3)
		[ "$N" = "$PAGE" ] && exit 0
		[ "$N" = '' ] && N=1
		echo -n "$N 0 0 0"
		rm -f $LINEFILE
		exit 1
	fi
fi