forked from josch/plakativ
refactor member variables
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1 changed files with 89 additions and 119 deletions
198
plakativ.py
198
plakativ.py
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@ -37,47 +37,50 @@ def pt_to_mm(length):
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return (25.4 * length) / 72.0
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class Plakativ:
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def __init__(self, infile=None):
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self.doc = None
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if infile is not None:
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self.open(infile)
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class PlakativException(Exception):
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pass
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def open(self, infile):
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class PageNrOutOfRangeException(PlakativException):
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pass
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class LayoutNotComputedException(PlakativException):
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pass
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class Plakativ:
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def __init__(self, infile, pagenr=1):
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self.doc = fitz.open(infile)
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# only allow pdf documents with exactly a single page
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assert len(self.doc) == 1
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self.dlist = self.doc[0].getDisplayList()
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self.pagenr = pagenr
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self.border_left = 20
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self.border_right = 20
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self.border_top = 20
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self.border_bottom = 20
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self.config = {
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"input_pagesize": (
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pt_to_mm(self.dlist.rect.width),
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pt_to_mm(self.dlist.rect.height),
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),
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"postersize": PAGE_SIZES["A1 (59.4 cm × 84.1 cm)"],
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}
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self.layout = {"output_pagesize": PAGE_SIZES["A4 (21.0 cm × 29.7 cm)"]}
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def set_input_pagenr(self, pagenr):
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if pagenr < 1 or pagenr >= len(self.doc):
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raise PageNrOutOfRangeException()
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self.pagenr = pagenr
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def get_input_page_size(self):
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width = self.doc[self.pagenr - 1].getDisplayList().rect.width
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height = self.doc[self.pagenr - 1].getDisplayList().rect.height
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return (width, height)
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def get_image(self, zoom):
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mat_0 = fitz.Matrix(zoom, zoom)
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pix = (
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self.doc[self.pagenr - 1]
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.getDisplayList()
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.getPixmap(matrix=mat_0, alpha=False)
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)
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return pix.getImageData("ppm")
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def compute_layout(self, mode, size=None, mult=None, npages=None):
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if self.doc is None:
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return
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self.config["mode"] = mode
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self.config["postersize"] = None
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self.config["mult"] = None
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self.config["npages"] = None
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if mode == "size":
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self.config["postersize"] = size
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elif mode == "mult":
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self.config["mult"] = mult
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elif mode == "npages":
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self.config["npages"] = npages
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else:
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raise Exception("unsupported mode: %s" % mode)
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self.layout = {"output_pagesize": PAGE_SIZES["A4 (21.0 cm × 29.7 cm)"]}
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printable_width = self.layout["output_pagesize"][0] - (
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self.border_left + self.border_right
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@ -85,27 +88,21 @@ class Plakativ:
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printable_height = self.layout["output_pagesize"][1] - (
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self.border_top + self.border_bottom
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)
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inpage_width = pt_to_mm(self.doc[self.pagenr - 1].getDisplayList().rect.width)
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inpage_height = pt_to_mm(self.doc[self.pagenr - 1].getDisplayList().rect.height)
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if mode in ["size", "mult"]:
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if mode == "size":
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# fit the input page size into the selected postersize
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poster_width = self.config["postersize"][0]
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poster_height = (
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poster_width * self.config["input_pagesize"][1]
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) / self.config["input_pagesize"][0]
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if poster_height > self.config["postersize"][1]:
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poster_height = self.config["postersize"][1]
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poster_width = (
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poster_height * self.config["input_pagesize"][0]
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) / self.config["input_pagesize"][1]
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poster_width = size[0]
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poster_height = (poster_width * inpage_height) / inpage_width
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if poster_height > size[1]:
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poster_height = size[1]
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poster_width = (poster_height * inpage_width) / inpage_height
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elif mode == "mult":
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area = self.config["input_pagesize"][0] * self.config["input_pagesize"][1] * mult
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poster_width = math.sqrt(
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area * self.config["input_pagesize"][0] / self.config["input_pagesize"][1]
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)
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poster_height = math.sqrt(
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area * self.config["input_pagesize"][1] / self.config["input_pagesize"][0]
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)
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area = inpage_width * inpage_height * mult
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poster_width = math.sqrt(area * inpage_width / inpage_height)
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poster_height = math.sqrt(area * inpage_height / inpage_width)
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else:
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raise Exception("unsupported mode: %s" % mode)
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@ -143,22 +140,18 @@ class Plakativ:
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# postersize with N pages
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best_area = 0
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best = None
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for x in range(1, self.config["npages"] + 1):
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for y in range(1, self.config["npages"] + 1):
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if x * y > self.config["npages"]:
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for x in range(1, npages + 1):
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for y in range(1, npages + 1):
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if x * y > npages:
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continue
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width_portrait = x * printable_width
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height_portrait = y * printable_height
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poster_width = width_portrait
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poster_height = (
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poster_width * self.config["input_pagesize"][1]
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) / self.config["input_pagesize"][0]
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poster_height = (poster_width * inpage_height) / inpage_width
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if poster_height > height_portrait:
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poster_height = height_portrait
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poster_width = (
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poster_height * self.config["input_pagesize"][0]
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) / self.config["input_pagesize"][1]
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poster_width = (poster_height * inpage_width) / inpage_height
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area_portrait = poster_width * poster_height
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@ -170,14 +163,10 @@ class Plakativ:
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height_landscape = y * printable_width
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poster_width = width_landscape
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poster_height = (
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poster_width * self.config["input_pagesize"][1]
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) / self.config["input_pagesize"][0]
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poster_height = (poster_width * inpage_height) / inpage_width
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if poster_height > height_landscape:
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poster_height = height_landscape
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poster_width = (
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poster_height * self.config["input_pagesize"][0]
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) / self.config["input_pagesize"][1]
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poster_width = (poster_height * inpage_width) / inpage_height
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area_landscape = poster_width * poster_height
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@ -211,30 +200,27 @@ class Plakativ:
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posy = y * printable_width
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self.layout["positions"].append((posx, posy, portrait))
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# return (self.postersize, (poster_width*poster_height)/(pt_to_mm(self.dlist.rect.width)*pt_to_mm(self.dlist.rect.height)), pages_x*pages_y)
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if mode == "size":
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self.config["mult"] = (poster_width * poster_height) / (
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self.config["input_pagesize"][0] * self.config["input_pagesize"][1]
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)
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self.config["npages"] = pages_x * pages_y
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mult = (poster_width * poster_height) / (inpage_width * inpage_height)
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npages = pages_x * pages_y
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elif mode == "mult":
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self.config["postersize"] = poster_width, poster_height
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self.config["npages"] = pages_x * pages_y
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size = poster_width, poster_height
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npages = pages_x * pages_y
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elif mode == "npages":
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self.config["postersize"] = poster_width, poster_height
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self.config["mult"] = (poster_width * poster_height) / (
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self.config["input_pagesize"][0] * self.config["input_pagesize"][1]
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)
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size = poster_width, poster_height
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mult = (poster_width * poster_height) / (inpage_width * inpage_height)
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else:
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raise Exception("unsupported mode: %s" % mode)
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return self.config["postersize"], self.config["mult"], self.config["npages"]
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return size, mult, npages
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def render(self, outfile):
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outdoc = fitz.open()
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if not hasattr(self, "layout"):
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raise LayoutNotComputedException()
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xref = 0
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r = self.dlist.rect
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inpage_width = pt_to_mm(self.doc[self.pagenr - 1].getDisplayList().rect.width)
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outdoc = fitz.open()
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for (x, y, portrait) in self.layout["positions"]:
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if portrait:
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@ -244,9 +230,7 @@ class Plakativ:
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page_width = mm_to_pt(self.layout["output_pagesize"][1])
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page_height = mm_to_pt(self.layout["output_pagesize"][0])
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page = outdoc.newPage(
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-1, # insert after last page
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width=page_width,
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height=page_height,
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-1, width=page_width, height=page_height # insert after last page
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)
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target_x = (
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@ -283,7 +267,7 @@ class Plakativ:
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mm_to_pt(target_yoffset + target_height),
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)
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factor = self.config["input_pagesize"][0] / self.layout["postersize"][0]
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factor = inpage_width / self.layout["postersize"][0]
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sourcerect = fitz.Rect(
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mm_to_pt(factor * target_x),
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mm_to_pt(factor * target_y),
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@ -291,13 +275,11 @@ class Plakativ:
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mm_to_pt(factor * (target_y + target_height)),
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)
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# update xref
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xref = page.showPDFpage(
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page.showPDFpage(
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targetrect, # fill the whole page
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self.doc, # input document
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0, # input page number
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self.pagenr - 1, # input page number
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clip=sourcerect, # part of the input page to use
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#rotate=0 if portrait else 90,
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)
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outdoc.save(outfile, garbage=4, deflate=True)
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@ -418,9 +400,7 @@ class Application(tkinter.Frame):
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self.pack(fill=tkinter.BOTH, expand=tkinter.TRUE)
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if plakativ is None:
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self.plakativ = Plakativ()
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else:
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if plakativ is not None:
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self.plakativ = plakativ
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self.border_left = tkinter.DoubleVar(value=20.0)
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@ -471,7 +451,7 @@ class Application(tkinter.Frame):
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pagesize_group.pack(fill=tkinter.X)
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pagesize_fixed = tkinter.StringVar()
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if self.plakativ.doc is None:
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if not hasattr(self, "plakativ"):
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pagesize_fixed.set("")
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else:
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pagesize_fixed.set(
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@ -484,7 +464,7 @@ class Application(tkinter.Frame):
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pagesize_fixed,
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*PAGE_SIZES.keys(),
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command=self.on_select_pagesize,
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state=tkinter.DISABLED if self.plakativ.doc is None else tkinter.NORMAL
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state=tkinter.DISABLED if not hasattr(self, "plakativ") else tkinter.NORMAL
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)
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pagesize_options.grid(row=1, column=0, columnspan=3, sticky=tkinter.W)
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@ -595,7 +575,7 @@ class Application(tkinter.Frame):
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self.postersize = PostersizeWidget(frame1.interior)
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self.postersize.pack(fill=tkinter.X)
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self.postersize.set("size", (False, (594, 841)), 1.0, 1)
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if self.plakativ.doc is not None:
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if hasattr(self, "plakativ"):
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self.postersize.callback = self.on_postersize
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layouter_group = tkinter.LabelFrame(frame1.interior, text="Layouter")
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@ -654,12 +634,7 @@ class Application(tkinter.Frame):
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mode, (custom_size, size), mult, npages = value
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size, mult, npages = self.plakativ.compute_layout(mode, size, mult, npages)
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self.draw()
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return (
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mode,
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(custom_size, size),
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mult,
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npages,
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)
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return (mode, (custom_size, size), mult, npages)
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def on_border(self):
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self.posterizer.border_left = self.border_left.get()
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@ -682,19 +657,20 @@ class Application(tkinter.Frame):
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# clean canvas
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self.canvas.delete(tkinter.ALL)
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if self.plakativ.doc is None:
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if not hasattr(self, "plakativ"):
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return
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canvas_padding = 10
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r = self.plakativ.dlist.rect
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width, height = self.plakativ.get_input_page_size()
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zoom_0 = min(
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self.canvas_size[0]
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/ r.width
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/ width
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* self.plakativ.layout["postersize"][0]
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/ (self.plakativ.layout["overallsize"][0] + canvas_padding),
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self.canvas_size[1]
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/ r.height
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/ height
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* self.plakativ.layout["postersize"][1]
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/ (self.plakativ.layout["overallsize"][1] + canvas_padding),
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)
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@ -706,15 +682,13 @@ class Application(tkinter.Frame):
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/ (self.plakativ.layout["overallsize"][1] + canvas_padding),
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)
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mat_0 = fitz.Matrix(zoom_0, zoom_0)
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pix = self.plakativ.dlist.getPixmap(matrix=mat_0, alpha=False)
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img = pix.getImageData("ppm")
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img = self.plakativ.get_image(zoom_0)
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tkimg = tkinter.PhotoImage(data=img)
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# draw image
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self.canvas.create_image(
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(self.canvas_size[0] - zoom_0 * r.width) / 2,
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(self.canvas_size[1] - zoom_0 * r.height) / 2,
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(self.canvas_size[0] - zoom_0 * width) / 2,
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(self.canvas_size[1] - zoom_0 * height) / 2,
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anchor=tkinter.NW,
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image=tkimg,
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)
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@ -758,18 +732,13 @@ class Application(tkinter.Frame):
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if filename == ():
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return
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self.filename = filename
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self.plakativ.open(self.filename)
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self.plakativ = Plakativ(self.filename)
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# compute the splitting with the current values
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mode, (_, size), mult, npages = self.postersize.value
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size, mult, npages = self.plakativ.compute_layout(mode, size, mult, npages)
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# copy computed values to postersize widget
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mode, (custom_size, _), _, _ = self.postersize.value
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self.postersize.value = (
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mode,
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(custom_size, size),
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mult,
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npages,
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)
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self.postersize.value = (mode, (custom_size, size), mult, npages)
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# update postersize widget
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self.postersize.set(*self.postersize.value)
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# draw preview in canvas
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@ -1058,6 +1027,7 @@ def main():
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compute_layout(args.input, args.output, mode="size", size=(297, 420))
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if __name__ == "__main__":
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main()
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