From d0f91abf6f870715ca6480efc11b5a90b7a26794 Mon Sep 17 00:00:00 2001 From: Johannes 'josch' Schauer Date: Tue, 2 Jul 2019 11:55:27 +0200 Subject: [PATCH] refactor member variables --- plakativ.py | 208 ++++++++++++++++++++++------------------------------ 1 file changed, 89 insertions(+), 119 deletions(-) diff --git a/plakativ.py b/plakativ.py index 7a85e56..b1b5426 100644 --- a/plakativ.py +++ b/plakativ.py @@ -37,47 +37,50 @@ def pt_to_mm(length): return (25.4 * length) / 72.0 -class Plakativ: - def __init__(self, infile=None): - self.doc = None - if infile is not None: - self.open(infile) +class PlakativException(Exception): + pass - def open(self, infile): + +class PageNrOutOfRangeException(PlakativException): + pass + + +class LayoutNotComputedException(PlakativException): + pass + + +class Plakativ: + def __init__(self, infile, pagenr=1): self.doc = fitz.open(infile) - # only allow pdf documents with exactly a single page - assert len(self.doc) == 1 - self.dlist = self.doc[0].getDisplayList() + self.pagenr = pagenr self.border_left = 20 self.border_right = 20 self.border_top = 20 self.border_bottom = 20 - self.config = { - "input_pagesize": ( - pt_to_mm(self.dlist.rect.width), - pt_to_mm(self.dlist.rect.height), - ), - "postersize": PAGE_SIZES["A1 (59.4 cm × 84.1 cm)"], - } - self.layout = {"output_pagesize": PAGE_SIZES["A4 (21.0 cm × 29.7 cm)"]} + + def set_input_pagenr(self, pagenr): + if pagenr < 1 or pagenr >= len(self.doc): + raise PageNrOutOfRangeException() + + self.pagenr = pagenr + + def get_input_page_size(self): + width = self.doc[self.pagenr - 1].getDisplayList().rect.width + height = self.doc[self.pagenr - 1].getDisplayList().rect.height + return (width, height) + + def get_image(self, zoom): + mat_0 = fitz.Matrix(zoom, zoom) + pix = ( + self.doc[self.pagenr - 1] + .getDisplayList() + .getPixmap(matrix=mat_0, alpha=False) + ) + return pix.getImageData("ppm") def compute_layout(self, mode, size=None, mult=None, npages=None): - if self.doc is None: - return - - self.config["mode"] = mode - self.config["postersize"] = None - self.config["mult"] = None - self.config["npages"] = None - if mode == "size": - self.config["postersize"] = size - elif mode == "mult": - self.config["mult"] = mult - elif mode == "npages": - self.config["npages"] = npages - else: - raise Exception("unsupported mode: %s" % mode) + self.layout = {"output_pagesize": PAGE_SIZES["A4 (21.0 cm × 29.7 cm)"]} printable_width = self.layout["output_pagesize"][0] - ( self.border_left + self.border_right @@ -85,27 +88,21 @@ class Plakativ: printable_height = self.layout["output_pagesize"][1] - ( self.border_top + self.border_bottom ) + inpage_width = pt_to_mm(self.doc[self.pagenr - 1].getDisplayList().rect.width) + inpage_height = pt_to_mm(self.doc[self.pagenr - 1].getDisplayList().rect.height) if mode in ["size", "mult"]: if mode == "size": # fit the input page size into the selected postersize - poster_width = self.config["postersize"][0] - poster_height = ( - poster_width * self.config["input_pagesize"][1] - ) / self.config["input_pagesize"][0] - if poster_height > self.config["postersize"][1]: - poster_height = self.config["postersize"][1] - poster_width = ( - poster_height * self.config["input_pagesize"][0] - ) / self.config["input_pagesize"][1] + poster_width = size[0] + poster_height = (poster_width * inpage_height) / inpage_width + if poster_height > size[1]: + poster_height = size[1] + poster_width = (poster_height * inpage_width) / inpage_height elif mode == "mult": - area = self.config["input_pagesize"][0] * self.config["input_pagesize"][1] * mult - poster_width = math.sqrt( - area * self.config["input_pagesize"][0] / self.config["input_pagesize"][1] - ) - poster_height = math.sqrt( - area * self.config["input_pagesize"][1] / self.config["input_pagesize"][0] - ) + area = inpage_width * inpage_height * mult + poster_width = math.sqrt(area * inpage_width / inpage_height) + poster_height = math.sqrt(area * inpage_height / inpage_width) else: raise Exception("unsupported mode: %s" % mode) @@ -143,22 +140,18 @@ class Plakativ: # postersize with N pages best_area = 0 best = None - for x in range(1, self.config["npages"] + 1): - for y in range(1, self.config["npages"] + 1): - if x * y > self.config["npages"]: + for x in range(1, npages + 1): + for y in range(1, npages + 1): + if x * y > npages: continue width_portrait = x * printable_width height_portrait = y * printable_height poster_width = width_portrait - poster_height = ( - poster_width * self.config["input_pagesize"][1] - ) / self.config["input_pagesize"][0] + poster_height = (poster_width * inpage_height) / inpage_width if poster_height > height_portrait: poster_height = height_portrait - poster_width = ( - poster_height * self.config["input_pagesize"][0] - ) / self.config["input_pagesize"][1] + poster_width = (poster_height * inpage_width) / inpage_height area_portrait = poster_width * poster_height @@ -170,14 +163,10 @@ class Plakativ: height_landscape = y * printable_width poster_width = width_landscape - poster_height = ( - poster_width * self.config["input_pagesize"][1] - ) / self.config["input_pagesize"][0] + poster_height = (poster_width * inpage_height) / inpage_width if poster_height > height_landscape: poster_height = height_landscape - poster_width = ( - poster_height * self.config["input_pagesize"][0] - ) / self.config["input_pagesize"][1] + poster_width = (poster_height * inpage_width) / inpage_height area_landscape = poster_width * poster_height @@ -211,43 +200,38 @@ class Plakativ: posy = y * printable_width self.layout["positions"].append((posx, posy, portrait)) - # 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) if mode == "size": - self.config["mult"] = (poster_width * poster_height) / ( - self.config["input_pagesize"][0] * self.config["input_pagesize"][1] - ) - self.config["npages"] = pages_x * pages_y + mult = (poster_width * poster_height) / (inpage_width * inpage_height) + npages = pages_x * pages_y elif mode == "mult": - self.config["postersize"] = poster_width, poster_height - self.config["npages"] = pages_x * pages_y + size = poster_width, poster_height + npages = pages_x * pages_y elif mode == "npages": - self.config["postersize"] = poster_width, poster_height - self.config["mult"] = (poster_width * poster_height) / ( - self.config["input_pagesize"][0] * self.config["input_pagesize"][1] - ) + size = poster_width, poster_height + mult = (poster_width * poster_height) / (inpage_width * inpage_height) else: raise Exception("unsupported mode: %s" % mode) - return self.config["postersize"], self.config["mult"], self.config["npages"] + return size, mult, npages def render(self, outfile): - outdoc = fitz.open() + if not hasattr(self, "layout"): + raise LayoutNotComputedException() - xref = 0 - r = self.dlist.rect + inpage_width = pt_to_mm(self.doc[self.pagenr - 1].getDisplayList().rect.width) + + outdoc = fitz.open() for (x, y, portrait) in self.layout["positions"]: if portrait: - page_width=mm_to_pt(self.layout["output_pagesize"][0]) - page_height=mm_to_pt(self.layout["output_pagesize"][1]) + page_width = mm_to_pt(self.layout["output_pagesize"][0]) + page_height = mm_to_pt(self.layout["output_pagesize"][1]) else: - page_width=mm_to_pt(self.layout["output_pagesize"][1]) - page_height=mm_to_pt(self.layout["output_pagesize"][0]) + page_width = mm_to_pt(self.layout["output_pagesize"][1]) + page_height = mm_to_pt(self.layout["output_pagesize"][0]) page = outdoc.newPage( - -1, # insert after last page - width=page_width, - height=page_height, - ) + -1, width=page_width, height=page_height # insert after last page + ) target_x = ( x - self.layout["overallsize"][0] / 2 + self.layout["postersize"][0] / 2 @@ -283,7 +267,7 @@ class Plakativ: mm_to_pt(target_yoffset + target_height), ) - factor = self.config["input_pagesize"][0] / self.layout["postersize"][0] + factor = inpage_width / self.layout["postersize"][0] sourcerect = fitz.Rect( mm_to_pt(factor * target_x), mm_to_pt(factor * target_y), @@ -291,13 +275,11 @@ class Plakativ: mm_to_pt(factor * (target_y + target_height)), ) - # update xref - xref = page.showPDFpage( + page.showPDFpage( targetrect, # fill the whole page self.doc, # input document - 0, # input page number + self.pagenr - 1, # input page number clip=sourcerect, # part of the input page to use - #rotate=0 if portrait else 90, ) outdoc.save(outfile, garbage=4, deflate=True) @@ -418,9 +400,7 @@ class Application(tkinter.Frame): self.pack(fill=tkinter.BOTH, expand=tkinter.TRUE) - if plakativ is None: - self.plakativ = Plakativ() - else: + if plakativ is not None: self.plakativ = plakativ self.border_left = tkinter.DoubleVar(value=20.0) @@ -471,7 +451,7 @@ class Application(tkinter.Frame): pagesize_group.pack(fill=tkinter.X) pagesize_fixed = tkinter.StringVar() - if self.plakativ.doc is None: + if not hasattr(self, "plakativ"): pagesize_fixed.set("") else: pagesize_fixed.set( @@ -484,7 +464,7 @@ class Application(tkinter.Frame): pagesize_fixed, *PAGE_SIZES.keys(), command=self.on_select_pagesize, - state=tkinter.DISABLED if self.plakativ.doc is None else tkinter.NORMAL + state=tkinter.DISABLED if not hasattr(self, "plakativ") else tkinter.NORMAL ) pagesize_options.grid(row=1, column=0, columnspan=3, sticky=tkinter.W) @@ -595,7 +575,7 @@ class Application(tkinter.Frame): self.postersize = PostersizeWidget(frame1.interior) self.postersize.pack(fill=tkinter.X) self.postersize.set("size", (False, (594, 841)), 1.0, 1) - if self.plakativ.doc is not None: + if hasattr(self, "plakativ"): self.postersize.callback = self.on_postersize layouter_group = tkinter.LabelFrame(frame1.interior, text="Layouter") @@ -654,12 +634,7 @@ class Application(tkinter.Frame): mode, (custom_size, size), mult, npages = value size, mult, npages = self.plakativ.compute_layout(mode, size, mult, npages) self.draw() - return ( - mode, - (custom_size, size), - mult, - npages, - ) + return (mode, (custom_size, size), mult, npages) def on_border(self): self.posterizer.border_left = self.border_left.get() @@ -682,19 +657,20 @@ class Application(tkinter.Frame): # clean canvas self.canvas.delete(tkinter.ALL) - if self.plakativ.doc is None: + if not hasattr(self, "plakativ"): return canvas_padding = 10 - r = self.plakativ.dlist.rect + width, height = self.plakativ.get_input_page_size() + zoom_0 = min( self.canvas_size[0] - / r.width + / width * self.plakativ.layout["postersize"][0] / (self.plakativ.layout["overallsize"][0] + canvas_padding), self.canvas_size[1] - / r.height + / height * self.plakativ.layout["postersize"][1] / (self.plakativ.layout["overallsize"][1] + canvas_padding), ) @@ -706,15 +682,13 @@ class Application(tkinter.Frame): / (self.plakativ.layout["overallsize"][1] + canvas_padding), ) - mat_0 = fitz.Matrix(zoom_0, zoom_0) - pix = self.plakativ.dlist.getPixmap(matrix=mat_0, alpha=False) - img = pix.getImageData("ppm") + img = self.plakativ.get_image(zoom_0) tkimg = tkinter.PhotoImage(data=img) # draw image self.canvas.create_image( - (self.canvas_size[0] - zoom_0 * r.width) / 2, - (self.canvas_size[1] - zoom_0 * r.height) / 2, + (self.canvas_size[0] - zoom_0 * width) / 2, + (self.canvas_size[1] - zoom_0 * height) / 2, anchor=tkinter.NW, image=tkimg, ) @@ -758,18 +732,13 @@ class Application(tkinter.Frame): if filename == (): return self.filename = filename - self.plakativ.open(self.filename) + self.plakativ = Plakativ(self.filename) # compute the splitting with the current values mode, (_, size), mult, npages = self.postersize.value size, mult, npages = self.plakativ.compute_layout(mode, size, mult, npages) # copy computed values to postersize widget mode, (custom_size, _), _, _ = self.postersize.value - self.postersize.value = ( - mode, - (custom_size, size), - mult, - npages, - ) + self.postersize.value = (mode, (custom_size, size), mult, npages) # update postersize widget self.postersize.set(*self.postersize.value) # draw preview in canvas @@ -1058,6 +1027,7 @@ def main(): compute_layout(args.input, args.output, mode="size", size=(297, 420)) + if __name__ == "__main__": main()