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pdfScale
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Added custom paper resizing functionality; more updates to help messages

master
Gustavo Neves 8 years ago
parent
75c948ce2e
commit
9a3b6a2f53
1 changed files with 137 additions and 38 deletions
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  1. +137
    -38
      pdfScale.sh

+ 137
- 38
pdfScale.sh View File

@@ -48,6 +48,8 @@ ADAPTIVEMODE=$TRUE # Automatically try to guess best mode
AUTOMATIC_SCALING=$TRUE # Default scaling in $SCALE, override by resize mode
MODE=""
RESIZE_PAPER_TYPE=""
CUSTOM_RESIZE_PAPER=$FALSE
FLIP_DETECTION=$TRUE
PGWIDTH=""
PGHEIGHT=""
RESIZE_WIDTH=""
@@ -76,7 +78,7 @@ EXIT_INVALID_PAPER_SIZE=50
# Main function called at the end
main() {
printVersion 1 'verbose'
loadDeps
checkDeps
vprint " Input file: $INFILEPDF"
vprint " Output file: $OUTFILEPDF"
getPageSize
@@ -118,7 +120,7 @@ main() {
########################## INITIALIZER ##########################

# Loads external dependencies and checks for errors
loadDeps() {
initDeps() {
GSBIN="$(which gs 2>/dev/null)"
BCBIN="$(which bc 2>/dev/null)"
IDBIN=$(which identify 2>/dev/null)
@@ -128,8 +130,11 @@ loadDeps() {
vprint "Checking for ghostscript and bcmath"
if notIsAvailable "$GSBIN"; then printDependency 'ghostscript'; fi
if notIsAvailable "$BCBIN"; then printDependency 'bc'; fi
if [[ $MODE = "IDENTIFY" ]]; then
}

# Checks for dependencies errors, run after getting options
checkDeps() {
if [[ $MODE = "IDENTIFY" ]]; then
vprint "Checking for imagemagick's identify"
if notIsAvailable "$IDBIN"; then printDependency 'imagemagick'; fi
fi
@@ -150,7 +155,7 @@ loadDeps() {

# Parse options
getOptions() {
while getopts ":vhVs:m:r:p" o; do
while getopts ":vhVs:m:r:pf" o; do
case "${o}" in
v)
((VERBOSE++))
@@ -176,6 +181,9 @@ getOptions() {
printPaperInfo
exit $EXIT_SUCCESS
;;
f)
FLIP_DETECTION=$FALSE
;;
*)
initError "Invalid Option: -$OPTARG" $EXIT_INVALID_OPTION
;;
@@ -206,15 +214,16 @@ getOptions() {
# Parses and validates the scaling factor
parseScale() {
AUTOMATIC_SCALING=$FALSE
if ! [[ -n "$1" && "$1" =~ ^-?[0-9]*([.][0-9]+)?$ && (($1 > 0 )) ]] ; then
if ! isFloatBiggerThanZero "$1"; then
printError "Invalid factor: $1"
printError "The factor must be a floating point number greater than 0"
printError "Example: for 80% use 0.8"
exit $EXIT_INVALID_SCALE
fi
SCALE=$1
SCALE="$1"
}


###################### GHOSTSCRIPT CALLS #######################

# Runs the ghostscript scaling script
@@ -241,16 +250,16 @@ pageScale() {

# Runs the ghostscript paper resize script
pageResize() {
getGSPaperSize "$RESIZE_PAPER_TYPE"
isNotCustomPaper && getGSPaperSize "$RESIZE_PAPER_TYPE"
local tmpInverter=""
if [[ $PGWIDTH -gt $PGHEIGHT && $RESIZE_WIDTH -lt $RESIZE_HEIGHT ]]; then
if [[ $FLIP_DETECTION -eq $TRUE && $PGWIDTH -gt $PGHEIGHT && $RESIZE_WIDTH -lt $RESIZE_HEIGHT ]]; then
vprint " Flip Detect: Wrong orientation!"
vprint " Inverting Width <-> Height"
tmpInverter=$RESIZE_HEIGHT
RESIZE_HEIGHT=$RESIZE_WIDTH
RESIZE_WIDTH=$tmpInverter
fi
vprint " Resizing to: $(uppercase $RESIZE_PAPER_TYPE) ( $RESIZE_WIDTH x $RESIZE_HEIGHT )"
vprint " Resizing to: $(uppercase $RESIZE_PAPER_TYPE) ( $RESIZE_WIDTH x $RESIZE_HEIGHT ) pts"

# Change page size
"$GSBIN" \
@@ -267,7 +276,6 @@ pageResize() {
}



################### PDF PAGE SIZE DETECTION ####################

# Parse a forced mode of operation
@@ -611,7 +619,8 @@ flsa flse halfletter hagaki)
printPaperNames() {
isEmpty "$paperNames" && getPaperNames
for i in "${!paperNames[@]}"; do
[[ $i -ne 0 && $((i % 5)) -eq 0 ]] && echo ""
[[ $i -eq 0 ]] && echo -n -e ' '
[[ $i -ne 0 && $((i % 5)) -eq 0 ]] && echo -n -e $'\n '
ppN="$(uppercase ${paperNames[i]})"
printf "%-14s" "$ppN"
done
@@ -677,8 +686,62 @@ printPaperTable() {
parsePaperResize() {
isEmpty "$1" && initError 'Invalid Paper Type: (empty)' $EXIT_INVALID_PAPER_SIZE
local lowercasePaper="$(lowercase $1)"
isPaperName "$lowercasePaper" || initError "Invalid Paper Type: $1" $EXIT_INVALID_PAPER_SIZE
RESIZE_PAPER_TYPE="$lowercasePaper"
if [[ "$1" = 'custom' ]]; then
if isNotValidMeasure "$2" || ! isFloatBiggerThanZero "$3" || ! isFloatBiggerThanZero "$4"; then
initError "Invalid Custom Paper Definition!"$'\n'"Use: -r 'custom <measurement> <width> <height>'"$'\n'"Measurements: mm, in, pts" $EXIT_INVALID_OPTION
fi
RESIZE_PAPER_TYPE="custom"
CUSTOM_RESIZE_PAPER=$TRUE
if isMilimeter "$2"; then
RESIZE_WIDTH="$(milimetersToPoints "$3")"
RESIZE_HEIGHT="$(milimetersToPoints "$4")"
elif isInch "$2"; then
RESIZE_WIDTH="$(inchesToPoints "$3")"
RESIZE_HEIGHT="$(inchesToPoints "$4")"
elif isPoint "$2"; then
RESIZE_WIDTH="$3"
RESIZE_HEIGHT="$4"
else
initError "Invalid Custom Paper Definition!"$'\n'"Use: -r 'custom <measurement> <width> <height>'"$'\n'"Measurements: mm, in, pts" $EXIT_INVALID_OPTION
fi
else
isPaperName "$lowercasePaper" || initError "Invalid Paper Type: $1" $EXIT_INVALID_PAPER_SIZE
RESIZE_PAPER_TYPE="$lowercasePaper"
fi
}

# Returns $TRUE if $1 is a valid measurement for a custom paper, $FALSE otherwise
isNotValidMeasure() {
isMilimeter "$1" || isInch "$1" || isPoint "$1" && return $FALSE
return $TRUE
}

# Returns $TRUE if $1 is a valid milimeter string, $FALSE otherwise
isMilimeter() {
[[ "$1" = 'mm' || "$1" = 'milimeters' || "$1" = 'milimeter' ]] && return $TRUE
return $FALSE
}

# Returns $TRUE if $1 is a valid inch string, $FALSE otherwise
isInch() {
[[ "$1" = 'in' || "$1" = 'inch' || "$1" = 'inches' ]] && return $TRUE
return $FALSE
}

# Returns $TRUE if $1 is a valid point string, $FALSE otherwise
isPoint() {
[[ "$1" = 'pt' || "$1" = 'pts' || "$1" = 'point' || "$1" = 'points' ]] && return $TRUE
return $FALSE
}

# Returns $TRUE if a custom paper is being used, $FALSE otherwise
isCustomPaper() {
return $CUSTOM_RESIZE_PAPER
}

isNotCustomPaper() {
isCustomPaper && return $FALSE
return $TRUE
}

# Returns $TRUE if the scale was set manually, $FALSE if we are using automatic scaling
@@ -747,10 +810,22 @@ uppercase() {
done
}

# Prints the postscript points rounded equivalent from $1 mm
milimetersToPoints() {
local pts=$(echo "scale=6; $1 * 72 / 25.4" | "$BCBIN")
printf '%.0f' "$pts" # Print rounded conversion
}

# Prints the postscript points rounded equivalent from $1 mm
inchesToPoints() {
local pts=$(echo "scale=6; $1 * 72" | "$BCBIN")
printf '%.0f' "$pts" # Print rounded conversion
}


########################## VALIDATORS ##########################

# Returns $TRUE if $PGWIDTH OR $PGWIDTH are empty or NOT an Integer, false otherwise
# Returns $TRUE if $PGWIDTH OR $PGWIDTH are empty or NOT an Integer, $FALSE otherwise
pageSizeIsInvalid() {
if isNotAnInteger "$PGWIDTH" || isNotAnInteger "$PGHEIGHT"; then
return $TRUE
@@ -759,33 +834,33 @@ pageSizeIsInvalid() {
}


# Return $TRUE if adaptive mode is enabled, false otherwise
# Return $TRUE if adaptive mode is enabled, $FALSE otherwise
isAdaptiveMode() {
return $ADAPTIVEMODE
}


# Return $TRUE if adaptive mode is disabled, false otherwise
# Return $TRUE if adaptive mode is disabled, $FALSE otherwise
isNotAdaptiveMode() {
isAdaptiveMode && return $FALSE
return $TRUE
}


# Return $TRUE if $1 is empty, false otherwise
# Return $TRUE if $1 is empty, $FALSE otherwise
isEmpty() {
[[ -z "$1" ]] && return $TRUE
return $FALSE
}


# Return $TRUE if $1 is NOT empty, false otherwise
# Return $TRUE if $1 is NOT empty, $FALSE otherwise
isNotEmpty() {
[[ -z "$1" ]] && return $FALSE
return $TRUE
}

# Returns $TRUE if $1 is an integer, $FALSE otherwise
isAnInteger() {
case $1 in
''|*[!0-9]*) return $FALSE ;;
@@ -793,7 +868,7 @@ isAnInteger() {
esac
}

# Returns $TRUE if $1 is NOT an integer, $FALSE otherwise
isNotAnInteger() {
case $1 in
''|*[!0-9]*) return $TRUE ;;
@@ -801,6 +876,17 @@ isNotAnInteger() {
esac
}

# Returns $TRUE if $1 is a floating point number (or an integer), $FALSE otherwise
isFloat() {
[[ -n "$1" && "$1" =~ ^-?[0-9]*([.][0-9]+)?$ ]] && return $TRUE
return $FALSE
}

# Returns $TRUE if $1 is a floating point number bigger than zero, $FALSE otherwise
isFloatBiggerThanZero() {
isFloat "$1" && [[ (( $1 > 0 )) ]] && return $TRUE
return $FALSE
}

# Returns $TRUE if $1 has a .pdf extension, false otherwsie
isPDF() {
@@ -892,30 +978,32 @@ Parameters:
Eg. -s 0.8 for 80% of the original size
-r <paper> Triggers the Resize Paper Mode
Resize PDF paper proportionally
Must be a valid Ghostscript paper name
A valid paper name or a custom defined paper
-f Disables the flip detection, paper will not be
rotated to landscape when needed (resize-only)
-p Prints Ghostscript paper info tables to screen

Scaling Mode:
The default mode of operation is scaling mode with fixed paper
size and scaling pre-set to $SCALE. By not using the resize mode
you are using scaling mode.
The default mode of operation is scaling mode with fixed paper
size and scaling pre-set to $SCALE. By not using the resize mode
you are using scaling mode.

Resize Paper Mode:
Disables the default scaling factor! ($SCALE)
Alternative mode of operation to change the PDF paper
proportionally. Will fit-to-page.
Disables the default scaling factor! ($SCALE)
Alternative mode of operation to change the PDF paper
proportionally. Will fit-to-page.

Mixed Mode:
In mixed mode both the -s option and -r option must be specified.
The PDF will be both scaled and have the paper type changed.
In mixed mode both the -s option and -r option must be specified.
The PDF will be first resized then scaled.

Output filename:
The output filename is optional. If no file name is passed
the output file will have the same name/destination of the
input file with added suffixes:
.SCALED.pdf is added to scaled files
.<PAPERSIZE>.pdf is added to resized files
.<PAPERSIZE>.SCALED.pdf is added in mixed mode
The output filename is optional. If no file name is passed
the output file will have the same name/destination of the
input file with added suffixes:
.SCALED.pdf is added to scaled files
.<PAPERSIZE>.pdf is added to resized files
.<PAPERSIZE>.SCALED.pdf is added in mixed mode

Page Detection Modes:
a, adaptive Default mode, tries all the methods below
@@ -927,6 +1015,14 @@ Page Detection Modes:
Valid Ghostscript Paper Names:
$paperList

Custom Paper Size:
Paper size can be set manually in Milimeters, Inches or Points.
Use: $PDFSCALE_NAME -r 'custom <measurement> <width> <height>'
Ex: $PDFSCALE_NAME -r 'custom mm 210 297'
Measurements can be: mm, inch, pts.
Custom paper definition MUST be quoted into a single parameter.
Actual size is applied in points (mms and inches are transformed).

Notes:
- Adaptive Page size detection will try different modes until
it gets a page size. You can force a mode with -m 'mode'.
@@ -939,11 +1035,13 @@ Notes:

Examples:
$PDFSCALE_NAME myPdfFile.pdf
$PDFSCALE_NAME myPdfFile.pdf myScaledPdf
$PDFSCALE_NAME myPdfFile.pdf \"My Scaled Pdf\"
$PDFSCALE_NAME -v -v myPdfFile.pdf
$PDFSCALE_NAME -s 0.85 myPdfFile.pdf myScaledPdf.pdf
$PDFSCALE_NAME -s 0.85 myPdfFile.pdf My\\ Scaled\\ Pdf.pdf
$PDFSCALE_NAME -m pdfinfo -s 0.80 -v myPdfFile.pdf
$PDFSCALE_NAME -v -v -m i -s 0.7 myPdfFile.pdf
$PDFSCALE_NAME -r A4 myPdfFile.pdf
$PDFSCALE_NAME -v -v -r \"custom mm 252 356\" -s 0.9 -f \"../input file.pdf\" \"../my new pdf\"
$PDFSCALE_NAME -h
"
}
@@ -1001,6 +1099,7 @@ printError() {

########################## EXECUTION ###########################

initDeps
getOptions "${@}"
main
exit $?


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