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https://github.com/ocrmypdf/OCRmyPDF.git
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pdfinfo: refactor to eliminate RawPageInfo
This commit is contained in:
James R. Barlow
parent
bb258fc99c
commit
037b96ca16
@ -556,89 +556,6 @@ def simplify_textboxes(miner, textbox_getter):
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yield TextboxInfo(box.bbox, visible, corrupt)
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class RawPageInfo:
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def __init__(self, pageno):
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self.pageno: int = pageno
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self.images: List = []
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self.textboxes: List = []
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self.has_text: Optional[bool] = False
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self.userunit: Decimal = Decimal(1.0)
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self.width_inches: Optional[Decimal] = None
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self.height_inches: Optional[Decimal] = None
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self.rotate: int = 0
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self.has_vector = False
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self.has_text = False
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self.dpi: Optional[Decimal] = None
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self.width_pixels: Optional[int] = None
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self.height_pixels: Optional[int] = None
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def _pdf_get_pageinfo(
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pdf, pageno: int, infile: PathLike, check_pages, detailed_analysis: bool
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):
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pageinfo = RawPageInfo(pageno)
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page = pdf.pages[pageno]
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mediabox = [Decimal(d) for d in page.MediaBox.as_list()]
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width_pt = mediabox[2] - mediabox[0]
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height_pt = mediabox[3] - mediabox[1]
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check_this_page = pageno in check_pages
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if check_this_page and detailed_analysis:
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pscript5_mode = str(pdf.docinfo.get('/Creator')).startswith('PScript5')
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miner = get_page_analysis(infile, pageno, pscript5_mode)
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pageinfo.textboxes = list(simplify_textboxes(miner, get_text_boxes))
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bboxes = (box.bbox for box in pageinfo.textboxes)
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pageinfo.has_text = _page_has_text(bboxes, width_pt, height_pt)
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else:
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pageinfo.textboxes = []
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pageinfo.has_text = None # i.e. "no information"
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userunit = page.get('/UserUnit', Decimal(1.0))
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if not isinstance(userunit, Decimal):
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userunit = Decimal(userunit)
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pageinfo.userunit = userunit
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pageinfo.width_inches = width_pt * userunit / Decimal(72.0)
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pageinfo.height_inches = height_pt * userunit / Decimal(72.0)
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try:
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pageinfo.rotate = int(page['/Rotate'])
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except KeyError:
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pageinfo.rotate = 0
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userunit_shorthand = (userunit, 0, 0, userunit, 0, 0)
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if check_this_page:
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pageinfo.has_vector = False
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pageinfo.has_text = False
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pageinfo.images = []
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for ci in _process_content_streams(
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pdf=pdf, container=page, shorthand=userunit_shorthand
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):
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if isinstance(ci, VectorMarker):
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pageinfo.has_vector = True
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elif isinstance(ci, TextMarker):
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pageinfo.has_text = True
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elif isinstance(ci, ImageInfo):
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pageinfo.images.append(ci)
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else:
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raise NotImplementedError()
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else:
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pageinfo.has_vector = None # i.e. "no information"
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pageinfo.has_text = None
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pageinfo.images = None
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if pageinfo.images:
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dpi = Resolution(0.0, 0.0).take_max(image.dpi for image in pageinfo.images)
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pageinfo.dpi = dpi
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pageinfo.width_pixels = int(round(dpi.x * float(pageinfo.width_inches)))
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pageinfo.height_pixels = int(round(dpi.y * float(pageinfo.height_inches)))
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return pageinfo
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worker_pdf = None
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@ -712,9 +629,69 @@ class PageInfo:
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self._pageno = pageno
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self._infile = infile
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self._detailed_analysis = detailed_analysis
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self._pageinfo = _pdf_get_pageinfo(
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pdf, pageno, infile, check_pages, detailed_analysis
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)
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self._gather_pageinfo(pdf, pageno, infile, check_pages, detailed_analysis)
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def _gather_pageinfo(
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self, pdf, pageno: int, infile: PathLike, check_pages, detailed_analysis: bool
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):
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page = pdf.pages[pageno]
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mediabox = [Decimal(d) for d in page.MediaBox.as_list()]
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width_pt = mediabox[2] - mediabox[0]
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height_pt = mediabox[3] - mediabox[1]
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check_this_page = pageno in check_pages
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if check_this_page and detailed_analysis:
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pscript5_mode = str(pdf.docinfo.get('/Creator')).startswith('PScript5')
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miner = get_page_analysis(infile, pageno, pscript5_mode)
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self._textboxes = list(simplify_textboxes(miner, get_text_boxes))
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bboxes = (box.bbox for box in self._textboxes)
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self._has_text = _page_has_text(bboxes, width_pt, height_pt)
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else:
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self._textboxes = []
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self._has_text = None # i.e. "no information"
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userunit = page.get('/UserUnit', Decimal(1.0))
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if not isinstance(userunit, Decimal):
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userunit = Decimal(userunit)
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self._userunit = userunit
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self._width_inches = width_pt * userunit / Decimal(72.0)
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self._height_inches = height_pt * userunit / Decimal(72.0)
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try:
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self._rotate = int(page['/Rotate'])
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except KeyError:
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self._rotate = 0
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userunit_shorthand = (userunit, 0, 0, userunit, 0, 0)
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if check_this_page:
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self._has_vector = False
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self._has_text = False
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self._images = []
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for ci in _process_content_streams(
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pdf=pdf, container=page, shorthand=userunit_shorthand
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):
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if isinstance(ci, VectorMarker):
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self._has_vector = True
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elif isinstance(ci, TextMarker):
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self._has_text = True
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elif isinstance(ci, ImageInfo):
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self._images.append(ci)
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else:
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raise NotImplementedError()
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else:
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self._has_vector = None # i.e. "no information"
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self._has_text = None
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self._images = None
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self._dpi = None
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if self._images:
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dpi = Resolution(0.0, 0.0).take_max(image.dpi for image in self._images)
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self._dpi = dpi
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self._width_pixels = int(round(dpi.x * float(self._width_inches)))
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self._height_pixels = int(round(dpi.y * float(self._height_inches)))
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@property
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def pageno(self) -> int:
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@ -722,25 +699,25 @@ class PageInfo:
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@property
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def has_text(self) -> bool:
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return self._pageinfo.has_text
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return self._has_text
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@property
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def has_corrupt_text(self) -> bool:
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if not self._detailed_analysis:
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raise NotImplementedError('Did not do detailed analysis')
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return any(tbox.is_corrupt for tbox in self._pageinfo.textboxes)
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return any(tbox.is_corrupt for tbox in self._textboxes)
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@property
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def has_vector(self) -> bool:
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return self._pageinfo.has_vector
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return self._has_vector
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@property
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def width_inches(self) -> Decimal:
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return self._pageinfo.width_inches
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return self._width_inches
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@property
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def height_inches(self) -> Decimal:
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return self._pageinfo.height_inches
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return self._height_inches
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@property
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def width_pixels(self) -> int:
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@ -752,18 +729,18 @@ class PageInfo:
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@property
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def rotation(self) -> int:
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return self._pageinfo.rotate
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return self._rotate
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@rotation.setter
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def rotation(self, value):
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if value in (0, 90, 180, 270, 360, -90, -180, -270):
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self._pageinfo.rotate = value
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self._rotate = value
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else:
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raise ValueError("rotation must be a cardinal angle")
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@property
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def images(self):
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return self._pageinfo.images
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return self._images
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def get_textareas(
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self, visible: Optional[bool] = None, corrupt: Optional[bool] = None
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@ -778,26 +755,22 @@ class PageInfo:
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result = False
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return result
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if not self._pageinfo.textboxes:
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if not self._textboxes:
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if visible is not None and corrupt is not None:
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raise NotImplementedError('Incomplete information on textboxes')
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return self._pageinfo.textboxes
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return self._textboxes
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return (
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obj.bbox
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for obj in self._pageinfo.textboxes
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if predicate(obj, visible, corrupt)
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)
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return (obj.bbox for obj in self._textboxes if predicate(obj, visible, corrupt))
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@property
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def dpi(self) -> Resolution:
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if self._pageinfo.dpi is None:
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if self._dpi is None:
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return Resolution(0.0, 0.0)
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return self._pageinfo.dpi
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return self._dpi
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@property
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def userunit(self) -> Decimal:
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return self._pageinfo.userunit
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return self._userunit
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@property
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def min_version(self) -> str:
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