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add command line interface

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This commit is contained in:
Johannes 'josch' Schauer 2020-06-10 00:17:16 +02:00
parent d9c14aed59
commit 9c4d5c3fbf
Signed by untrusted user: josch
GPG key ID: F2CBA5C78FBD83E1
1 changed files with 336 additions and 9 deletions
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345
plakativ.py
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@ -15,8 +15,6 @@
from collections import OrderedDict
import math
import fitz
import tkinter
import tkinter.filedialog
import sys
import argparse
import os.path
@ -30,6 +28,21 @@ try:
except ImportError:
have_img2pdf = False
have_tkinter = True
try:
import tkinter
import tkinter.filedialog
except ImportError:
have_tkinter = False
class dummy:
def __init__(self, *args, **kwargs):
raise Exception("this functionality needs tkinter")
tkinter = type("", (), {})()
tkinter.Frame = dummy
tkinter.Menubutton = dummy
tkinter.LabelFrame = dummy
VERSION = "0.2"
@ -47,12 +60,46 @@ PAGE_SIZES = OrderedDict(
("Tabloid (11 in × 17 in)", (279.4, 431.8)),
]
)
papersizes = {
"letter": "8.5inx11in",
"a0": "841mmx1189mm",
"a1": "594mmx841mm",
"a2": "420mmx594mm",
"a3": "297mmx420mm",
"a4": "210mmx297mm",
"a5": "148mmx210mm",
"a6": "105mmx148mm",
"legal": "8.5inx14in",
"tabloid": "11inx17in",
}
papernames = {
"letter": "Letter",
"a0": "A0",
"a1": "A1",
"a2": "A2",
"a3": "A3",
"a4": "A4",
"a5": "A5",
"a6": "A6",
"legal": "Legal",
"tabloid": "Tabloid",
}
Unit = Enum("Unit", "pt cm mm inch")
def mm_to_pt(length):
return (72.0 * length) / 25.4
def cm_to_mm(length):
return length * 10.0
def in_to_mm(length):
return length / 25.4
def pt_to_mm(length):
return (25.4 * length) / 72.0
@ -650,7 +697,12 @@ class Plakativ:
clip=sourcerect, # part of the input page to use
)
outdoc.save(outfile, garbage=4, deflate=True)
if hasattr(outfile, "write"):
# outfile is an object with a write() method
outfile.write(outdoc.write(garbage=4, deflate=True))
else:
# outfile is used as a filename
outdoc.save(outfile, garbage=4, deflate=True)
# from Python 3.7 Lib/idlelib/configdialog.py
@ -1680,13 +1732,200 @@ def compute_layout(
def gui():
if not have_tkinter:
raise Exception("the GUI requires tkinter")
root = tkinter.Tk()
app = Application(master=root)
app.mainloop()
def parse_num(num, name):
if num == "":
raise argparse.ArgumentTypeError("%s is empty" % name)
unit = None
if num.endswith("pt"):
unit = Unit.pt
elif num.endswith("cm"):
unit = Unit.cm
elif num.endswith("mm"):
unit = Unit.mm
elif num.endswith("in"):
unit = Unit.inch
else:
try:
num = float(num)
except ValueError:
msg = (
"%s is not a floating point number and doesn't have a "
"valid unit: %s" % (name, num)
)
raise argparse.ArgumentTypeError(msg)
if unit is None:
unit = Unit.pt
else:
num = num[:-2]
try:
num = float(num)
except ValueError:
msg = "%s is not a floating point number: %s" % (name, num)
raise argparse.ArgumentTypeError(msg)
if num < 0:
msg = "%s must not be negative: %s" % (name, num)
raise argparse.ArgumentTypeError(msg)
if unit == Unit.cm:
num = cm_to_mm(num)
elif unit == Unit.pt:
num = pt_to_mm(num)
elif unit == Unit.inch:
num = in_to_mm(num)
return num
def parse_borderarg(string):
if ":" in string:
vals = string.split(":")
if len(vals) in [0, 1]:
raise argparse.ArgumentTypeError("logic error")
elif len(vals) == 2:
t = b = parse_num(vals[0], "top/bottom border")
r = l = parse_num(vals[1], "right/left border")
elif len(vals) == 3:
t = parse_num(vals[0], "top border")
r = l = parse_num(vals[1], "right/left border")
b = parse_num(vals[2], "bottom border")
elif len(vals) == 4:
t = parse_num(vals[0], "top border")
r = parse_num(vals[1], "right border")
b = parse_num(vals[2], "bottom border")
l = parse_num(vals[3], "left border")
else:
raise argparse.ArgumentTypeError(
"border option can not have more than four values"
)
else:
if string == "":
raise argparse.ArgumentTypeError("border option cannot be empty")
val = parse_num(string, "border")
t, r, b, l = val, val, val, val
return t, r, b, l
def parse_pagesize_rectarg(string):
if papersizes.get(string.lower()):
string = papersizes[string.lower()]
if "x" not in string:
# if there is no separating "x" in the string, then the string is
# interpreted as the width
w = parse_num(string, "width")
h = None
else:
w, h = string.split("x", 1)
w = parse_num(w, "width")
h = parse_num(h, "height")
if w is None and h is None:
raise argparse.ArgumentTypeError("at least one dimension must be specified")
return w, h
def main():
parser = argparse.ArgumentParser()
rendered_papersizes = ""
for k, v in sorted(papersizes.items()):
rendered_papersizes += " %-8s %s\n" % (papernames[k], v)
parser = argparse.ArgumentParser(
formatter_class=argparse.RawDescriptionHelpFormatter,
description="""\
Create large posters by printing and gluing together smaller pages.
This program is for situations when you want to create a large poster or banner
but do not have a printer that supports large sheets of paper. Plakativ allows
one to enlarge and split a PDF across multiple pages, creating another PDF with
pages of the desired printable size. After printing, the pages can be cut and
glued together to form a larger poster. Features:
- lossless operation
- no pixel artifacts when upscaling if PDF contains vector graphics
- GUI with preview functionality
- complex layouter to save paper
- optimize by number of pages, output poster size or multiple of input area
Options:
""",
epilog="""\
Poster size:
There are three ways to set the size of the final poster. The desired method
is selected using the mutually exclusive options --size, --factor and
--maxpages. The --size option allows one to specify a width and height into
which the input will be fitted, swapping width and height as necessary, to
create the largest possible poster with those dimensions while keeping the
aspect ratio of the input. The --factor option scales the area of the input
by the given multiplier. If the input is a DIN A4 page, then a factor of 2
will create a DIN A3 poster. The --maxpages option allows one to specify a
maximum number of pages one is willing to print out and creates the largest
possible poster that can possibly be created with the given number of pages.
For example, printing a DIN A1 poster on DIN A4 pages with a border of 15 mm
will require 15 pages with the simple layouter engine. With --maxpages=15 a
slightly larger poster will be generated but will make better use of the
available number of pages of paper. Using the complex layouter, an even
bigger poster can be generated with just 15 pages of paper by changing the
orientation of some of them.
Paper sizes:
You can specify the short hand paper size names shown in the first column in
the table below as arguments to the --pagesize and --imgsize options. The
width and height they are mapping to is shown in the second column. Giving
the value in the second column has the same effect as giving the short hand
in the first column. The values are case insensitive.
%s
Borders, cutting and gluing:
The border on each page set using the --border option has two purposes.
Firstly, the border is useful for printers that do not support borderless
printing. Secondly, the border is the area where the individual pages overlap
and can be glued together. Before gluing, cut away the border area where the
printer was unable to print on. As long as you stay within the distance set
by the --border option, you don't need precision tools to do the cutting but
can cut freehand using a pair of scissors. You only need to cut the borders
from those edges that will end up being glued onto another piece of paper.
By keeping even the area at the border your printer could not print on from
the paper at the bottom you maintain a larger area for the glue.
Examples:
To run the tkinter GUI execute either:
$ plakativ-gui
$ plakativ --gui
To use plakativ without GUI from the command line you can run:
$ plakativ --size A1 --output=poster.pdf input.pdf
This will create a file poster.pdf with multiple DIN A4 pages which, after
being cut and glued together will form a DIN A1 poster of the content on the
first page of input.pdf.
Written by Johannes 'josch' Schauer <josch@mister-muffin.de>
Report bugs at https://gitlab.mister-muffin.de/josch/plakativ/issues
"""
% rendered_papersizes,
)
parser.add_argument(
"-v",
"--verbose",
action="store_true",
help="Makes the program operate in verbose mode, printing messages on "
"standard error.",
)
parser.add_argument(
"-V",
"--version",
action="version",
version="%(prog)s " + VERSION,
help="Prints version information and exits.",
)
gui_group = parser.add_mutually_exclusive_group(required=False)
gui_group.add_argument(
"--gui",
@ -1705,11 +1944,75 @@ def main():
else:
parser.set_defaults(gui=False)
parser.add_argument(
"--mode", choices=["size", "mult", "npages"], help="select poster size"
mode_group = parser.add_mutually_exclusive_group(required=False)
mode_group.add_argument(
"--size",
metavar="LxL",
dest="mode",
type=parse_pagesize_rectarg,
help="Poster width/height either as width times height or one of the "
"known paper sizes (see below). Cannot be used together with --factor "
"or --maxpages.",
)
mode_group.add_argument(
"--factor",
metavar="MULT",
dest="mode",
type=float,
help="Poster size as multiple of input page area. Cannot be used "
"together with --size or --maxpages.",
)
mode_group.add_argument(
"--maxpages",
metavar="NUM",
dest="mode",
type=int,
help="Maximum possible poster size with the given number of pages. "
"Cannot be used together with --size or --factor.",
)
parser.add_argument("-o", "--output", help="output filename (default: stdout)")
parser.add_argument("input", nargs="?", help="input filename (default: stdin)")
parser.add_argument(
"--pagenum",
type=int,
default=1,
help="Page number of input PDF to turn into a poster (default: 1)",
)
parser.add_argument(
"--pagesize",
metavar="LxL",
type=parse_pagesize_rectarg,
default=(210, 297),
help="Width and height of the output pages or one of the known paper "
"sizes (see below). This is the paper size that you are printing on "
"with your printer (default: A4)",
)
parser.add_argument(
"--border",
metavar="L[:L[:L[:L]]]",
type=parse_borderarg,
default=(15, 15, 15, 15),
help="The borders on each output page for gluing. This specifies how "
"much the pages overlap each other. If your printer cannot print "
"borderless, then this value should also be larger than the border up "
"to which your printer is able to print. One value sets the border on "
"all four sides. Multiple values are separated by a colon. With two "
"values, the first value sets top and bottom border and the second "
"value sets left and right border. With three values, the first value "
"sets the top border, the second value the left and right border and "
"the third value the bottom border. Four values set top, right, "
"bottom and left borders in that order.",
)
parser.add_argument(
"--layouter",
choices=["simple", "complex"],
default="simple",
help="The algorithm arranging the individual pages making the poster. "
"The simple layout has all pages in the same orientation. The complex "
"layout is able to sometimes require less pages for the same poster "
"size and is allowed to rotate pages.",
)
parser.add_argument("-o", "--output", help="output file")
parser.add_argument("input", nargs="?", help="input file")
args = parser.parse_args()
@ -1717,7 +2020,31 @@ def main():
gui()
sys.exit(0)
compute_layout(args.input, args.output, mode=args.mode, size=(297, 420))
if not args.input or args.input == "-":
args.input = sys.stdin.buffer
if not args.output or args.output == "-":
args.output = sys.stdout.buffer
if isinstance(args.mode, tuple):
mode = "size"
elif isinstance(args.mode, float):
mode = "mult"
elif isinstance(args.mode, int):
mode = "npages"
else:
raise Exception("logic error")
compute_layout(
args.input,
args.output,
mode,
pagenr=args.pagenum - 1, # zero based
pagesize=args.pagesize,
border=args.border,
strategy=args.layouter,
**{mode: args.mode},
)
if __name__ == "__main__":