import logging
import re
from io import BytesIO
from typing import Dict, List, Mapping, Optional, Sequence, Tuple, Union, cast
import numpy as np

from pdf2zh import settings
from pdf2zh.casting import safe_float
from pdf2zh.cmapdb import CMap, CMapBase, CMapDB
from pdf2zh.pdfcolor import PREDEFINED_COLORSPACE, PDFColorSpace
from pdf2zh.pdfdevice import PDFDevice, PDFTextSeq
from pdf2zh.pdfexceptions import PDFException, PDFValueError
from pdf2zh.pdffont import (
    PDFCIDFont,
    PDFFont,
    PDFFontError,
    PDFTrueTypeFont,
    PDFType1Font,
    PDFType3Font,
)
from pdf2zh.pdfpage import PDFPage
from pdf2zh.pdftypes import (
    LITERALS_ASCII85_DECODE,
    PDFObjRef,
    PDFStream,
    dict_value,
    list_value,
    resolve1,
    stream_value,
)
from pdf2zh.psexceptions import PSEOF, PSTypeError
from pdf2zh.psparser import (
    KWD,
    LIT,
    PSKeyword,
    PSLiteral,
    PSStackParser,
    PSStackType,
    keyword_name,
    literal_name,
)
from pdf2zh.utils import (
    MATRIX_IDENTITY,
    Matrix,
    PathSegment,
    Point,
    Rect,
    choplist,
    mult_matrix,
    apply_matrix_pt,
)

log = logging.getLogger(__name__)


class PDFResourceError(PDFException):
    pass


class PDFInterpreterError(PDFException):
    pass


LITERAL_PDF = LIT("PDF")
LITERAL_TEXT = LIT("Text")
LITERAL_FONT = LIT("Font")
LITERAL_FORM = LIT("Form")
LITERAL_IMAGE = LIT("Image")


class PDFTextState:
    matrix: Matrix
    linematrix: Point

    def __init__(self) -> None:
        self.font: Optional[PDFFont] = None
        self.fontsize: float = 0
        self.charspace: float = 0
        self.wordspace: float = 0
        self.scaling: float = 100
        self.leading: float = 0
        self.render: int = 0
        self.rise: float = 0
        self.reset()
        # self.matrix is set
        # self.linematrix is set

    def __repr__(self) -> str:
        return (
            "<PDFTextState: font=%r, fontsize=%r, charspace=%r, "
            "wordspace=%r, scaling=%r, leading=%r, render=%r, rise=%r, "
            "matrix=%r, linematrix=%r>"
            % (
                self.font,
                self.fontsize,
                self.charspace,
                self.wordspace,
                self.scaling,
                self.leading,
                self.render,
                self.rise,
                self.matrix,
                self.linematrix,
            )
        )

    def copy(self) -> "PDFTextState":
        obj = PDFTextState()
        obj.font = self.font
        obj.fontsize = self.fontsize
        obj.charspace = self.charspace
        obj.wordspace = self.wordspace
        obj.scaling = self.scaling
        obj.leading = self.leading
        obj.render = self.render
        obj.rise = self.rise
        obj.matrix = self.matrix
        obj.linematrix = self.linematrix
        return obj

    def reset(self) -> None:
        self.matrix = MATRIX_IDENTITY
        self.linematrix = (0, 0)


Color = Union[
    float,  # Greyscale
    Tuple[float, float, float],  # R, G, B
    Tuple[float, float, float, float],  # C, M, Y, K
]


class PDFGraphicState:
    def __init__(self) -> None:
        self.linewidth: float = 0
        self.linecap: Optional[object] = None
        self.linejoin: Optional[object] = None
        self.miterlimit: Optional[object] = None
        self.dash: Optional[Tuple[object, object]] = None
        self.intent: Optional[object] = None
        self.flatness: Optional[object] = None

        # stroking color
        self.scolor: Optional[Color] = None

        # non stroking color
        self.ncolor: Optional[Color] = None

    def copy(self) -> "PDFGraphicState":
        obj = PDFGraphicState()
        obj.linewidth = self.linewidth
        obj.linecap = self.linecap
        obj.linejoin = self.linejoin
        obj.miterlimit = self.miterlimit
        obj.dash = self.dash
        obj.intent = self.intent
        obj.flatness = self.flatness
        obj.scolor = self.scolor
        obj.ncolor = self.ncolor
        return obj

    def __repr__(self) -> str:
        return (
            "<PDFGraphicState: linewidth=%r, linecap=%r, linejoin=%r, "
            " miterlimit=%r, dash=%r, intent=%r, flatness=%r, "
            " stroking color=%r, non stroking color=%r>"
            % (
                self.linewidth,
                self.linecap,
                self.linejoin,
                self.miterlimit,
                self.dash,
                self.intent,
                self.flatness,
                self.scolor,
                self.ncolor,
            )
        )


class PDFResourceManager:
    """Repository of shared resources.

    ResourceManager facilitates reuse of shared resources
    such as fonts and images so that large objects are not
    allocated multiple times.
    """

    def __init__(self, caching: bool = True) -> None:
        self.caching = caching
        self._cached_fonts: Dict[object, PDFFont] = {}

    def get_procset(self, procs: Sequence[object]) -> None:
        for proc in procs:
            if proc is LITERAL_PDF or proc is LITERAL_TEXT:
                pass
            else:
                pass

    def get_cmap(self, cmapname: str, strict: bool = False) -> CMapBase:
        try:
            return CMapDB.get_cmap(cmapname)
        except CMapDB.CMapNotFound:
            if strict:
                raise
            return CMap()

    def get_font(self, objid: object, spec: Mapping[str, object]) -> PDFFont:
        if objid and objid in self._cached_fonts:
            font = self._cached_fonts[objid]
        else:
            # log.debug("get_font: create: objid=%r, spec=%r", objid, spec)
            if settings.STRICT:
                if spec["Type"] is not LITERAL_FONT:
                    raise PDFFontError("Type is not /Font")
            # Create a Font object.
            if "Subtype" in spec:
                subtype = literal_name(spec["Subtype"])
            else:
                if settings.STRICT:
                    raise PDFFontError("Font Subtype is not specified.")
                subtype = "Type1"
            if subtype in ("Type1", "MMType1"):
                # Type1 Font
                font = PDFType1Font(self, spec)
            elif subtype == "TrueType":
                # TrueType Font
                font = PDFTrueTypeFont(self, spec)
            elif subtype == "Type3":
                # Type3 Font
                font = PDFType3Font(self, spec)
            elif subtype in ("CIDFontType0", "CIDFontType2"):
                # CID Font
                font = PDFCIDFont(self, spec)
            elif subtype == "Type0":
                # Type0 Font
                dfonts = list_value(spec["DescendantFonts"])
                assert dfonts
                subspec = dict_value(dfonts[0]).copy()
                for k in ("Encoding", "ToUnicode"):
                    if k in spec:
                        subspec[k] = resolve1(spec[k])
                font = self.get_font(None, subspec)
            else:
                if settings.STRICT:
                    raise PDFFontError("Invalid Font spec: %r" % spec)
                font = PDFType1Font(self, spec)  # this is so wrong!
            if objid and self.caching:
                self._cached_fonts[objid] = font
        return font


class PDFContentParser(PSStackParser[Union[PSKeyword, PDFStream]]):
    def __init__(self, streams: Sequence[object]) -> None:
        self.streams = streams
        self.istream = 0
        # PSStackParser.__init__(fp=None) is safe only because we've overloaded
        # all the methods that would attempt to access self.fp without first
        # calling self.fillfp().
        PSStackParser.__init__(self, None)  # type: ignore[arg-type]

    def fillfp(self) -> None:
        if not self.fp:
            if self.istream < len(self.streams):
                strm = stream_value(self.streams[self.istream])
                self.istream += 1
            else:
                raise PSEOF("Unexpected EOF, file truncated?")
            self.fp = BytesIO(strm.get_data())
            # if log.isEnabledFor(logging.DEBUG):
            #     log.debug(f'STREAM DATA {strm.get_data()}')

    def seek(self, pos: int) -> None:
        self.fillfp()
        PSStackParser.seek(self, pos)

    def fillbuf(self) -> None:
        if self.charpos < len(self.buf):
            return
        while 1:
            self.fillfp()
            self.bufpos = self.fp.tell()
            self.buf = self.fp.read(self.BUFSIZ)
            if self.buf:
                break
            self.fp = None  # type: ignore[assignment]
        self.charpos = 0

    def get_inline_data(self, pos: int, target: bytes = b"EI") -> Tuple[int, bytes]:
        self.seek(pos)
        i = 0
        data = b""
        while i <= len(target):
            self.fillbuf()
            if i:
                ci = self.buf[self.charpos]
                c = bytes((ci,))
                data += c
                self.charpos += 1
                if (
                    len(target) <= i
                    and c.isspace()
                    or i < len(target)
                    and c == (bytes((target[i],)))
                ):
                    i += 1
                else:
                    i = 0
            else:
                try:
                    j = self.buf.index(target[0], self.charpos)
                    data += self.buf[self.charpos : j + 1]
                    self.charpos = j + 1
                    i = 1
                except ValueError:
                    data += self.buf[self.charpos :]
                    self.charpos = len(self.buf)
        data = data[: -(len(target) + 1)]  # strip the last part
        data = re.sub(rb"(\x0d\x0a|[\x0d\x0a])$", b"", data)
        return (pos, data)

    def flush(self) -> None:
        self.add_results(*self.popall())

    KEYWORD_BI = KWD(b"BI")
    KEYWORD_ID = KWD(b"ID")
    KEYWORD_EI = KWD(b"EI")

    def do_keyword(self, pos: int, token: PSKeyword) -> None:
        if token is self.KEYWORD_BI:
            # inline image within a content stream
            self.start_type(pos, "inline")
        elif token is self.KEYWORD_ID:
            try:
                (_, objs) = self.end_type("inline")
                if len(objs) % 2 != 0:
                    error_msg = f"Invalid dictionary construct: {objs!r}"
                    raise PSTypeError(error_msg)
                d = {literal_name(k): resolve1(v) for (k, v) in choplist(2, objs)}
                eos = b"EI"
                filter = d.get("F", None)
                if filter is not None:
                    if isinstance(filter, PSLiteral):
                        filter = [filter]
                    if filter[0] in LITERALS_ASCII85_DECODE:
                        eos = b"~>"
                (pos, data) = self.get_inline_data(pos + len(b"ID "), target=eos)
                if eos != b"EI":  # it may be necessary for decoding
                    data += eos
                obj = PDFStream(d, data)
                self.push((pos, obj))
                if eos == b"EI":  # otherwise it is still in the stream
                    self.push((pos, self.KEYWORD_EI))
            except PSTypeError:
                if settings.STRICT:
                    raise
        else:
            self.push((pos, token))


PDFStackT = PSStackType[PDFStream]
"""Types that may appear on the PDF argument stack."""


class PDFPageInterpreter:
    """Processor for the content of a PDF page

    Reference: PDF Reference, Appendix A, Operator Summary
    """

    def __init__(self, rsrcmgr: PDFResourceManager, device: PDFDevice, obj_patch) -> None:
        self.rsrcmgr = rsrcmgr
        self.device = device
        self.obj_patch = obj_patch

    def dup(self) -> "PDFPageInterpreter":
        return self.__class__(self.rsrcmgr, self.device, self.obj_patch)

    def init_resources(self, resources: Dict[object, object]) -> None:
        """Prepare the fonts and XObjects listed in the Resource attribute."""
        self.resources = resources
        self.fontmap: Dict[object, PDFFont] = {}
        self.fontid: Dict[PDFFont, object] = {}
        self.xobjmap = {}
        self.csmap: Dict[str, PDFColorSpace] = PREDEFINED_COLORSPACE.copy()
        if not resources:
            return

        def get_colorspace(spec: object) -> Optional[PDFColorSpace]:
            if isinstance(spec, list):
                name = literal_name(spec[0])
            else:
                name = literal_name(spec)
            if name == "ICCBased" and isinstance(spec, list) and len(spec) >= 2:
                return PDFColorSpace(name, stream_value(spec[1])["N"])
            elif name == "DeviceN" and isinstance(spec, list) and len(spec) >= 2:
                return PDFColorSpace(name, len(list_value(spec[1])))
            else:
                return PREDEFINED_COLORSPACE.get(name)

        for k, v in dict_value(resources).items():
            # log.debug("Resource: %r: %r", k, v)
            if k == "Font":
                for fontid, spec in dict_value(v).items():
                    objid = None
                    if isinstance(spec, PDFObjRef):
                        objid = spec.objid
                    spec = dict_value(spec)
                    self.fontmap[fontid] = self.rsrcmgr.get_font(objid, spec)
                    self.fontid[self.fontmap[fontid]]=fontid
            elif k == "ColorSpace":
                for csid, spec in dict_value(v).items():
                    colorspace = get_colorspace(resolve1(spec))
                    if colorspace is not None:
                        self.csmap[csid] = colorspace
            elif k == "ProcSet":
                self.rsrcmgr.get_procset(list_value(v))
            elif k == "XObject":
                for xobjid, xobjstrm in dict_value(v).items():
                    self.xobjmap[xobjid] = xobjstrm

    def init_state(self, ctm: Matrix) -> None:
        """Initialize the text and graphic states for rendering a page."""
        # gstack: stack for graphical states.
        self.gstack: List[Tuple[Matrix, PDFTextState, PDFGraphicState]] = []
        self.ctm = ctm
        self.device.set_ctm(self.ctm)
        self.textstate = PDFTextState()
        self.graphicstate = PDFGraphicState()
        self.curpath: List[PathSegment] = []
        # argstack: stack for command arguments.
        self.argstack: List[PDFStackT] = []
        # set some global states.
        self.scs: Optional[PDFColorSpace] = None
        self.ncs: Optional[PDFColorSpace] = None
        if self.csmap:
            self.scs = self.ncs = next(iter(self.csmap.values()))

    def push(self, obj: PDFStackT) -> None:
        self.argstack.append(obj)

    def pop(self, n: int) -> List[PDFStackT]:
        if n == 0:
            return []
        x = self.argstack[-n:]
        self.argstack = self.argstack[:-n]
        return x

    def get_current_state(self) -> Tuple[Matrix, PDFTextState, PDFGraphicState]:
        return (self.ctm, self.textstate.copy(), self.graphicstate.copy())

    def set_current_state(
        self,
        state: Tuple[Matrix, PDFTextState, PDFGraphicState],
    ) -> None:
        (self.ctm, self.textstate, self.graphicstate) = state
        self.device.set_ctm(self.ctm)

    def do_q(self) -> None:
        """Save graphics state"""
        self.gstack.append(self.get_current_state())

    def do_Q(self) -> None:
        """Restore graphics state"""
        if self.gstack:
            self.set_current_state(self.gstack.pop())

    def do_cm(
        self,
        a1: PDFStackT,
        b1: PDFStackT,
        c1: PDFStackT,
        d1: PDFStackT,
        e1: PDFStackT,
        f1: PDFStackT,
    ) -> None:
        """Concatenate matrix to current transformation matrix"""
        self.ctm = mult_matrix(cast(Matrix, (a1, b1, c1, d1, e1, f1)), self.ctm)
        self.device.set_ctm(self.ctm)

    def do_w(self, linewidth: PDFStackT) -> None:
        """Set line width"""
        self.graphicstate.linewidth = cast(float, linewidth)

    def do_J(self, linecap: PDFStackT) -> None:
        """Set line cap style"""
        self.graphicstate.linecap = linecap

    def do_j(self, linejoin: PDFStackT) -> None:
        """Set line join style"""
        self.graphicstate.linejoin = linejoin

    def do_M(self, miterlimit: PDFStackT) -> None:
        """Set miter limit"""
        self.graphicstate.miterlimit = miterlimit

    def do_d(self, dash: PDFStackT, phase: PDFStackT) -> None:
        """Set line dash pattern"""
        self.graphicstate.dash = (dash, phase)

    def do_ri(self, intent: PDFStackT) -> None:
        """Set color rendering intent"""
        self.graphicstate.intent = intent

    def do_i(self, flatness: PDFStackT) -> None:
        """Set flatness tolerance"""
        self.graphicstate.flatness = flatness

    def do_gs(self, name: PDFStackT) -> None:
        """Set parameters from graphics state parameter dictionary"""
        # TODO

    def do_m(self, x: PDFStackT, y: PDFStackT) -> None:
        """Begin new subpath"""
        self.curpath.append(("m", cast(float, x), cast(float, y)))

    def do_l(self, x: PDFStackT, y: PDFStackT) -> None:
        """Append straight line segment to path"""
        self.curpath.append(("l", cast(float, x), cast(float, y)))

    def do_c(
        self,
        x1: PDFStackT,
        y1: PDFStackT,
        x2: PDFStackT,
        y2: PDFStackT,
        x3: PDFStackT,
        y3: PDFStackT,
    ) -> None:
        """Append curved segment to path (three control points)"""
        self.curpath.append(
            (
                "c",
                cast(float, x1),
                cast(float, y1),
                cast(float, x2),
                cast(float, y2),
                cast(float, x3),
                cast(float, y3),
            ),
        )

    def do_v(self, x2: PDFStackT, y2: PDFStackT, x3: PDFStackT, y3: PDFStackT) -> None:
        """Append curved segment to path (initial point replicated)"""
        self.curpath.append(
            ("v", cast(float, x2), cast(float, y2), cast(float, x3), cast(float, y3)),
        )

    def do_y(self, x1: PDFStackT, y1: PDFStackT, x3: PDFStackT, y3: PDFStackT) -> None:
        """Append curved segment to path (final point replicated)"""
        self.curpath.append(
            ("y", cast(float, x1), cast(float, y1), cast(float, x3), cast(float, y3)),
        )

    def do_h(self) -> None:
        """Close subpath"""
        self.curpath.append(("h",))

    def do_re(self, x: PDFStackT, y: PDFStackT, w: PDFStackT, h: PDFStackT) -> None:
        """Append rectangle to path"""
        x = cast(float, x)
        y = cast(float, y)
        w = cast(float, w)
        h = cast(float, h)
        self.curpath.append(("m", x, y))
        self.curpath.append(("l", x + w, y))
        self.curpath.append(("l", x + w, y + h))
        self.curpath.append(("l", x, y + h))
        self.curpath.append(("h",))

    def do_S(self) -> None:
        """Stroke path"""
        def is_black(color: Color) -> bool:
            if isinstance(color, Tuple):
                return sum(color)==0
            else:
                return color==0
        if len(self.curpath)==2 and self.curpath[0][0]=='m' and self.curpath[1][0]=='l' and apply_matrix_pt(self.ctm,self.curpath[0][-2:])[1]==apply_matrix_pt(self.ctm,self.curpath[1][-2:])[1] and is_black(self.graphicstate.scolor): # 独立直线，水平，黑色
            # print(apply_matrix_pt(self.ctm,self.curpath[0][-2:]),apply_matrix_pt(self.ctm,self.curpath[1][-2:]),self.graphicstate.scolor)
            self.device.paint_path(self.graphicstate, True, False, False, self.curpath)
            self.curpath = []
            return 'n'
        else:
            self.curpath = []

    def do_s(self) -> None:
        """Close and stroke path"""
        self.do_h()
        self.do_S()

    def do_f(self) -> None:
        """Fill path using nonzero winding number rule"""
        # self.device.paint_path(self.graphicstate, False, True, False, self.curpath)
        self.curpath = []

    def do_F(self) -> None:
        """Fill path using nonzero winding number rule (obsolete)"""

    def do_f_a(self) -> None:
        """Fill path using even-odd rule"""
        # self.device.paint_path(self.graphicstate, False, True, True, self.curpath)
        self.curpath = []

    def do_B(self) -> None:
        """Fill and stroke path using nonzero winding number rule"""
        # self.device.paint_path(self.graphicstate, True, True, False, self.curpath)
        self.curpath = []

    def do_B_a(self) -> None:
        """Fill and stroke path using even-odd rule"""
        # self.device.paint_path(self.graphicstate, True, True, True, self.curpath)
        self.curpath = []

    def do_b(self) -> None:
        """Close, fill, and stroke path using nonzero winding number rule"""
        self.do_h()
        self.do_B()

    def do_b_a(self) -> None:
        """Close, fill, and stroke path using even-odd rule"""
        self.do_h()
        self.do_B_a()

    def do_n(self) -> None:
        """End path without filling or stroking"""
        self.curpath = []

    def do_W(self) -> None:
        """Set clipping path using nonzero winding number rule"""

    def do_W_a(self) -> None:
        """Set clipping path using even-odd rule"""

    def do_CS(self, name: PDFStackT) -> None:
        """Set color space for stroking operations

        Introduced in PDF 1.1
        """
        try:
            self.scs = self.csmap[literal_name(name)]
        except KeyError:
            if settings.STRICT:
                raise PDFInterpreterError("Undefined ColorSpace: %r" % name)

    def do_cs(self, name: PDFStackT) -> None:
        """Set color space for nonstroking operations"""
        try:
            self.ncs = self.csmap[literal_name(name)]
        except KeyError:
            if settings.STRICT:
                raise PDFInterpreterError("Undefined ColorSpace: %r" % name)

    def do_G(self, gray: PDFStackT) -> None:
        """Set gray level for stroking operations"""
        self.graphicstate.scolor = cast(float, gray)
        self.scs = self.csmap["DeviceGray"]

    def do_g(self, gray: PDFStackT) -> None:
        """Set gray level for nonstroking operations"""
        self.graphicstate.ncolor = cast(float, gray)
        self.ncs = self.csmap["DeviceGray"]

    def do_RG(self, r: PDFStackT, g: PDFStackT, b: PDFStackT) -> None:
        """Set RGB color for stroking operations"""
        self.graphicstate.scolor = (cast(float, r), cast(float, g), cast(float, b))
        self.scs = self.csmap["DeviceRGB"]

    def do_rg(self, r: PDFStackT, g: PDFStackT, b: PDFStackT) -> None:
        """Set RGB color for nonstroking operations"""
        self.graphicstate.ncolor = (cast(float, r), cast(float, g), cast(float, b))
        self.ncs = self.csmap["DeviceRGB"]

    def do_K(self, c: PDFStackT, m: PDFStackT, y: PDFStackT, k: PDFStackT) -> None:
        """Set CMYK color for stroking operations"""
        self.graphicstate.scolor = (
            cast(float, c),
            cast(float, m),
            cast(float, y),
            cast(float, k),
        )
        self.scs = self.csmap["DeviceCMYK"]

    def do_k(self, c: PDFStackT, m: PDFStackT, y: PDFStackT, k: PDFStackT) -> None:
        """Set CMYK color for nonstroking operations"""
        self.graphicstate.ncolor = (
            cast(float, c),
            cast(float, m),
            cast(float, y),
            cast(float, k),
        )
        self.ncs = self.csmap["DeviceCMYK"]

    def do_SCN(self) -> None:
        """Set color for stroking operations."""
        if self.scs:
            n = self.scs.ncomponents
        else:
            if settings.STRICT:
                raise PDFInterpreterError("No colorspace specified!")
            n = 1
        args=self.pop(n)
        self.graphicstate.scolor = cast(Color, args)
        return args

    def do_scn(self) -> None:
        """Set color for nonstroking operations"""
        if self.ncs:
            n = self.ncs.ncomponents
        else:
            if settings.STRICT:
                raise PDFInterpreterError("No colorspace specified!")
            n = 1
        args=self.pop(n)
        self.graphicstate.ncolor = cast(Color, args)
        return args

    def do_SC(self) -> None:
        """Set color for stroking operations"""
        return self.do_SCN()

    def do_sc(self) -> None:
        """Set color for nonstroking operations"""
        return self.do_scn()

    def do_sh(self, name: object) -> None:
        """Paint area defined by shading pattern"""

    def do_BT(self) -> None:
        """Begin text object

        Initializing the text matrix, Tm, and the text line matrix, Tlm, to
        the identity matrix. Text objects cannot be nested; a second BT cannot
        appear before an ET.
        """
        self.textstate.reset()

    def do_ET(self) -> None:
        """End a text object"""

    def do_BX(self) -> None:
        """Begin compatibility section"""

    def do_EX(self) -> None:
        """End compatibility section"""

    def do_MP(self, tag: PDFStackT) -> None:
        """Define marked-content point"""
        self.device.do_tag(cast(PSLiteral, tag))

    def do_DP(self, tag: PDFStackT, props: PDFStackT) -> None:
        """Define marked-content point with property list"""
        self.device.do_tag(cast(PSLiteral, tag), props)

    def do_BMC(self, tag: PDFStackT) -> None:
        """Begin marked-content sequence"""
        self.device.begin_tag(cast(PSLiteral, tag))

    def do_BDC(self, tag: PDFStackT, props: PDFStackT) -> None:
        """Begin marked-content sequence with property list"""
        self.device.begin_tag(cast(PSLiteral, tag), props)

    def do_EMC(self) -> None:
        """End marked-content sequence"""
        self.device.end_tag()

    def do_Tc(self, space: PDFStackT) -> None:
        """Set character spacing.

        Character spacing is used by the Tj, TJ, and ' operators.

        :param space: a number expressed in unscaled text space units.
        """
        self.textstate.charspace = cast(float, space)

    def do_Tw(self, space: PDFStackT) -> None:
        """Set the word spacing.

        Word spacing is used by the Tj, TJ, and ' operators.

        :param space: a number expressed in unscaled text space units
        """
        self.textstate.wordspace = cast(float, space)

    def do_Tz(self, scale: PDFStackT) -> None:
        """Set the horizontal scaling.

        :param scale: is a number specifying the percentage of the normal width
        """
        self.textstate.scaling = cast(float, scale)

    def do_TL(self, leading: PDFStackT) -> None:
        """Set the text leading.

        Text leading is used only by the T*, ', and " operators.

        :param leading: a number expressed in unscaled text space units
        """
        self.textstate.leading = -cast(float, leading)

    def do_Tf(self, fontid: PDFStackT, fontsize: PDFStackT) -> None:
        """Set the text font

        :param fontid: the name of a font resource in the Font subdictionary
            of the current resource dictionary
        :param fontsize: size is a number representing a scale factor.
        """
        try:
            self.textstate.font = self.fontmap[literal_name(fontid)]
        except KeyError:
            if settings.STRICT:
                raise PDFInterpreterError("Undefined Font id: %r" % fontid)
            self.textstate.font = self.rsrcmgr.get_font(None, {})
        self.textstate.fontsize = cast(float, fontsize)

    def do_Tr(self, render: PDFStackT) -> None:
        """Set the text rendering mode"""
        self.textstate.render = cast(int, render)

    def do_Ts(self, rise: PDFStackT) -> None:
        """Set the text rise

        :param rise: a number expressed in unscaled text space units
        """
        self.textstate.rise = cast(float, rise)

    def do_Td(self, tx: PDFStackT, ty: PDFStackT) -> None:
        """Move to the start of the next line

        Offset from the start of the current line by (tx , ty).
        """
        tx_ = safe_float(tx)
        ty_ = safe_float(ty)
        if tx_ is not None and ty_ is not None:
            (a, b, c, d, e, f) = self.textstate.matrix
            e_new = tx_ * a + ty_ * c + e
            f_new = tx_ * b + ty_ * d + f
            self.textstate.matrix = (a, b, c, d, e_new, f_new)

        elif settings.STRICT:
            raise PDFValueError(f"Invalid offset ({tx!r}, {ty!r}) for Td")

        self.textstate.linematrix = (0, 0)

    def do_TD(self, tx: PDFStackT, ty: PDFStackT) -> None:
        """Move to the start of the next line.

        offset from the start of the current line by (tx , ty). As a side effect, this
        operator sets the leading parameter in the text state.
        """
        tx_ = safe_float(tx)
        ty_ = safe_float(ty)

        if tx_ is not None and ty_ is not None:
            (a, b, c, d, e, f) = self.textstate.matrix
            e_new = tx_ * a + ty_ * c + e
            f_new = tx_ * b + ty_ * d + f
            self.textstate.matrix = (a, b, c, d, e_new, f_new)

        elif settings.STRICT:
            raise PDFValueError("Invalid offset ({tx}, {ty}) for TD")

        if ty_ is not None:
            self.textstate.leading = ty_

        self.textstate.linematrix = (0, 0)

    def do_Tm(
        self,
        a: PDFStackT,
        b: PDFStackT,
        c: PDFStackT,
        d: PDFStackT,
        e: PDFStackT,
        f: PDFStackT,
    ) -> None:
        """Set text matrix and text line matrix"""
        self.textstate.matrix = cast(Matrix, (a, b, c, d, e, f))
        self.textstate.linematrix = (0, 0)

    def do_T_a(self) -> None:
        """Move to start of next text line"""
        (a, b, c, d, e, f) = self.textstate.matrix
        self.textstate.matrix = (
            a,
            b,
            c,
            d,
            self.textstate.leading * c + e,
            self.textstate.leading * d + f,
        )
        self.textstate.linematrix = (0, 0)

    def do_TJ(self, seq: PDFStackT) -> None:
        """Show text, allowing individual glyph positioning"""
        if self.textstate.font is None:
            if settings.STRICT:
                raise PDFInterpreterError("No font specified!")
            return
        assert self.ncs is not None
        self.device.render_string(
            self.textstate,
            cast(PDFTextSeq, seq),
            self.ncs,
            self.graphicstate.copy(),
        )

    def do_Tj(self, s: PDFStackT) -> None:
        """Show text"""
        self.do_TJ([s])

    def do__q(self, s: PDFStackT) -> None:
        """Move to next line and show text

        The ' (single quote) operator.
        """
        self.do_T_a()
        self.do_TJ([s])

    def do__w(self, aw: PDFStackT, ac: PDFStackT, s: PDFStackT) -> None:
        """Set word and character spacing, move to next line, and show text

        The " (double quote) operator.
        """
        self.do_Tw(aw)
        self.do_Tc(ac)
        self.do_TJ([s])

    def do_BI(self) -> None:
        """Begin inline image object"""

    def do_ID(self) -> None:
        """Begin inline image data"""

    def do_EI(self, obj: PDFStackT) -> None:
        """End inline image object"""
        if isinstance(obj, PDFStream) and "W" in obj and "H" in obj:
            iobjid = str(id(obj))
            self.device.begin_figure(iobjid, (0, 0, 1, 1), MATRIX_IDENTITY)
            self.device.render_image(iobjid, obj)
            self.device.end_figure(iobjid)

    def do_Do(self, xobjid_arg: PDFStackT) -> None:
        """Invoke named XObject"""
        xobjid = literal_name(xobjid_arg)
        try:
            xobj = stream_value(self.xobjmap[xobjid])
        except KeyError:
            if settings.STRICT:
                raise PDFInterpreterError("Undefined xobject id: %r" % xobjid)
            return
        # log.debug("Processing xobj: %r", xobj)
        subtype = xobj.get("Subtype")
        if subtype is LITERAL_FORM and "BBox" in xobj:
            interpreter = self.dup()
            bbox = cast(Rect, list_value(xobj["BBox"]))
            matrix = cast(Matrix, list_value(xobj.get("Matrix", MATRIX_IDENTITY)))
            # According to PDF reference 1.7 section 4.9.1, XObjects in
            # earlier PDFs (prior to v1.2) use the page's Resources entry
            # instead of having their own Resources entry.
            xobjres = xobj.get("Resources")
            if xobjres:
                resources = dict_value(xobjres)
            else:
                resources = self.resources.copy()
            self.device.begin_figure(xobjid, bbox, matrix)
            ctm=mult_matrix(matrix, self.ctm)
            ops_base=interpreter.render_contents(
                resources,
                [xobj],
                ctm=ctm,
            )
            try: # 有的时候 form 字体加不上这里会烂掉
                self.device.fontid=interpreter.fontid
                self.device.fontmap=interpreter.fontmap
                ops_new=self.device.end_figure(xobjid)
                ctm_inv=np.linalg.inv(np.array(ctm[:4]).reshape(2,2))
                pos_inv=-np.mat(ctm[4:])*ctm_inv
                a,b,c,d=ctm_inv.reshape(4).tolist()
                e,f=pos_inv.tolist()[0]
                self.obj_patch[self.xobjmap[xobjid].objid]=f'q {ops_base}Q {a} {b} {c} {d} {e} {f} cm {ops_new}'
            except:
                pass
        elif subtype is LITERAL_IMAGE and "Width" in xobj and "Height" in xobj:
            self.device.begin_figure(xobjid, (0, 0, 1, 1), MATRIX_IDENTITY)
            self.device.render_image(xobjid, xobj)
            self.device.end_figure(xobjid)
        else:
            # unsupported xobject type.
            pass

    def process_page(self, page: PDFPage) -> None:
        # log.debug("Processing page: %r", page)
        # print(page.mediabox,page.cropbox)
        # (x0, y0, x1, y1) = page.mediabox
        (x0, y0, x1, y1) = page.cropbox
        if page.rotate == 90:
            ctm = (0, -1, 1, 0, -y0, x1)
        elif page.rotate == 180:
            ctm = (-1, 0, 0, -1, x1, y1)
        elif page.rotate == 270:
            ctm = (0, 1, -1, 0, y1, -x0)
        else:
            ctm = (1, 0, 0, 1, -x0, -y0)
        self.device.begin_page(page, ctm)
        ops_base=self.render_contents(page.resources, page.contents, ctm=ctm)
        self.device.fontid=self.fontid
        self.device.fontmap=self.fontmap
        ops_new=self.device.end_page(page)
        # 上面渲染的时候会根据 cropbox 减掉页面偏移得到真实坐标，这里输出的时候需要用 cm 把页面偏移加回来
        self.obj_patch[page.page_xref]=f'q {ops_base}Q 1 0 0 1 {x0} {y0} cm {ops_new}' # ops_base 里可能有图，需要让 ops_new 里的文字覆盖在上面，使用 q/Q 重置位置矩阵
        for obj in page.contents:
            self.obj_patch[obj.objid]=''

    def render_contents(
        self,
        resources: Dict[object, object],
        streams: Sequence[object],
        ctm: Matrix = MATRIX_IDENTITY,
    ) -> None:
        """Render the content streams.

        This method may be called recursively.
        """
        # log.debug(
        #     "render_contents: resources=%r, streams=%r, ctm=%r",
        #     resources,
        #     streams,
        #     ctm,
        # )
        self.init_resources(resources)
        self.init_state(ctm)
        return self.execute(list_value(streams))

    def execute(self, streams: Sequence[object]) -> None:
        ops=''
        try:
            parser = PDFContentParser(streams)
        except PSEOF:
            # empty page
            return
        while True:
            try:
                _, (_, obj) = parser.nextobject()
            except PSEOF:
                break
            if isinstance(obj, PSKeyword):
                name = keyword_name(obj)
                method = "do_%s" % name.replace("*", "_a").replace('"', "_w").replace(
                    "'",
                    "_q",
                )
                if hasattr(self, method):
                    func = getattr(self, method)
                    nargs = func.__code__.co_argcount - 1
                    if nargs:
                        args = self.pop(nargs)
                        # log.debug("exec: %s %r", name, args)
                        if len(args) == nargs:
                            func(*args)
                            if not (name[0]=='T' or name in ['"',"'",'EI','MP','DP','BMC','BDC']): # 过滤 T 系列文字指令，因为 EI 的参数是 obj 所以也需要过滤（只在少数文档中画横线时使用），过滤 marked 系列指令
                                p=" ".join([f'{x:f}' if isinstance(x,float) else str(x).replace("'","") for x in args])
                                ops+=f'{p} {name} '
                    else:
                        # log.debug("exec: %s", name)
                        targs=func()
                        if targs==None:
                            targs=[]
                        if not (name[0]=='T' or name in ['BI','ID','EMC']):
                            p=" ".join([f'{x:f}' if isinstance(x,float) else str(x).replace("'","") for x in targs])
                            ops+=f'{p} {name} '
                elif settings.STRICT:
                    error_msg = "Unknown operator: %r" % name
                    raise PDFInterpreterError(error_msg)
            else:
                self.push(obj)
        # print('REV DATA',ops)
        return ops