PNG  IHDRxsBIT|d pHYs+tEXtSoftwarewww.inkscape.org<,tEXtComment File Manager

File Manager

Path: /opt/alt/python27/lib/python2.7/site-packages/pip/_vendor/html5lib/treebuilders/

Viewing File: base.py

from __future__ import absolute_import, division, unicode_literals
from pip._vendor.six import text_type

from ..constants import scopingElements, tableInsertModeElements, namespaces

# The scope markers are inserted when entering object elements,
# marquees, table cells, and table captions, and are used to prevent formatting
# from "leaking" into tables, object elements, and marquees.
Marker = None

listElementsMap = {
    None: (frozenset(scopingElements), False),
    "button": (frozenset(scopingElements | {(namespaces["html"], "button")}), False),
    "list": (frozenset(scopingElements | {(namespaces["html"], "ol"),
                                          (namespaces["html"], "ul")}), False),
    "table": (frozenset([(namespaces["html"], "html"),
                         (namespaces["html"], "table")]), False),
    "select": (frozenset([(namespaces["html"], "optgroup"),
                          (namespaces["html"], "option")]), True)
}


class Node(object):
    """Represents an item in the tree"""
    def __init__(self, name):
        """Creates a Node

        :arg name: The tag name associated with the node

        """
        # The tag name associated with the node
        self.name = name
        # The parent of the current node (or None for the document node)
        self.parent = None
        # The value of the current node (applies to text nodes and comments)
        self.value = None
        # A dict holding name -> value pairs for attributes of the node
        self.attributes = {}
        # A list of child nodes of the current node. This must include all
        # elements but not necessarily other node types.
        self.childNodes = []
        # A list of miscellaneous flags that can be set on the node.
        self._flags = []

    def __str__(self):
        attributesStr = " ".join(["%s=\"%s\"" % (name, value)
                                  for name, value in
                                  self.attributes.items()])
        if attributesStr:
            return "<%s %s>" % (self.name, attributesStr)
        else:
            return "<%s>" % (self.name)

    def __repr__(self):
        return "<%s>" % (self.name)

    def appendChild(self, node):
        """Insert node as a child of the current node

        :arg node: the node to insert

        """
        raise NotImplementedError

    def insertText(self, data, insertBefore=None):
        """Insert data as text in the current node, positioned before the
        start of node insertBefore or to the end of the node's text.

        :arg data: the data to insert

        :arg insertBefore: True if you want to insert the text before the node
            and False if you want to insert it after the node

        """
        raise NotImplementedError

    def insertBefore(self, node, refNode):
        """Insert node as a child of the current node, before refNode in the
        list of child nodes. Raises ValueError if refNode is not a child of
        the current node

        :arg node: the node to insert

        :arg refNode: the child node to insert the node before

        """
        raise NotImplementedError

    def removeChild(self, node):
        """Remove node from the children of the current node

        :arg node: the child node to remove

        """
        raise NotImplementedError

    def reparentChildren(self, newParent):
        """Move all the children of the current node to newParent.
        This is needed so that trees that don't store text as nodes move the
        text in the correct way

        :arg newParent: the node to move all this node's children to

        """
        # XXX - should this method be made more general?
        for child in self.childNodes:
            newParent.appendChild(child)
        self.childNodes = []

    def cloneNode(self):
        """Return a shallow copy of the current node i.e. a node with the same
        name and attributes but with no parent or child nodes
        """
        raise NotImplementedError

    def hasContent(self):
        """Return true if the node has children or text, false otherwise
        """
        raise NotImplementedError


class ActiveFormattingElements(list):
    def append(self, node):
        equalCount = 0
        if node != Marker:
            for element in self[::-1]:
                if element == Marker:
                    break
                if self.nodesEqual(element, node):
                    equalCount += 1
                if equalCount == 3:
                    self.remove(element)
                    break
        list.append(self, node)

    def nodesEqual(self, node1, node2):
        if not node1.nameTuple == node2.nameTuple:
            return False

        if not node1.attributes == node2.attributes:
            return False

        return True


class TreeBuilder(object):
    """Base treebuilder implementation

    * documentClass - the class to use for the bottommost node of a document
    * elementClass - the class to use for HTML Elements
    * commentClass - the class to use for comments
    * doctypeClass - the class to use for doctypes

    """
    # pylint:disable=not-callable

    # Document class
    documentClass = None

    # The class to use for creating a node
    elementClass = None

    # The class to use for creating comments
    commentClass = None

    # The class to use for creating doctypes
    doctypeClass = None

    # Fragment class
    fragmentClass = None

    def __init__(self, namespaceHTMLElements):
        """Create a TreeBuilder

        :arg namespaceHTMLElements: whether or not to namespace HTML elements

        """
        if namespaceHTMLElements:
            self.defaultNamespace = "http://www.w3.org/1999/xhtml"
        else:
            self.defaultNamespace = None
        self.reset()

    def reset(self):
        self.openElements = []
        self.activeFormattingElements = ActiveFormattingElements()

        # XXX - rename these to headElement, formElement
        self.headPointer = None
        self.formPointer = None

        self.insertFromTable = False

        self.document = self.documentClass()

    def elementInScope(self, target, variant=None):

        # If we pass a node in we match that. if we pass a string
        # match any node with that name
        exactNode = hasattr(target, "nameTuple")
        if not exactNode:
            if isinstance(target, text_type):
                target = (namespaces["html"], target)
            assert isinstance(target, tuple)

        listElements, invert = listElementsMap[variant]

        for node in reversed(self.openElements):
            if exactNode and node == target:
                return True
            elif not exactNode and node.nameTuple == target:
                return True
            elif (invert ^ (node.nameTuple in listElements)):
                return False

        assert False  # We should never reach this point

    def reconstructActiveFormattingElements(self):
        # Within this algorithm the order of steps described in the
        # specification is not quite the same as the order of steps in the
        # code. It should still do the same though.

        # Step 1: stop the algorithm when there's nothing to do.
        if not self.activeFormattingElements:
            return

        # Step 2 and step 3: we start with the last element. So i is -1.
        i = len(self.activeFormattingElements) - 1
        entry = self.activeFormattingElements[i]
        if entry == Marker or entry in self.openElements:
            return

        # Step 6
        while entry != Marker and entry not in self.openElements:
            if i == 0:
                # This will be reset to 0 below
                i = -1
                break
            i -= 1
            # Step 5: let entry be one earlier in the list.
            entry = self.activeFormattingElements[i]

        while True:
            # Step 7
            i += 1

            # Step 8
            entry = self.activeFormattingElements[i]
            clone = entry.cloneNode()  # Mainly to get a new copy of the attributes

            # Step 9
            element = self.insertElement({"type": "StartTag",
                                          "name": clone.name,
                                          "namespace": clone.namespace,
                                          "data": clone.attributes})

            # Step 10
            self.activeFormattingElements[i] = element

            # Step 11
            if element == self.activeFormattingElements[-1]:
                break

    def clearActiveFormattingElements(self):
        entry = self.activeFormattingElements.pop()
        while self.activeFormattingElements and entry != Marker:
            entry = self.activeFormattingElements.pop()

    def elementInActiveFormattingElements(self, name):
        """Check if an element exists between the end of the active
        formatting elements and the last marker. If it does, return it, else
        return false"""

        for item in self.activeFormattingElements[::-1]:
            # Check for Marker first because if it's a Marker it doesn't have a
            # name attribute.
            if item == Marker:
                break
            elif item.name == name:
                return item
        return False

    def insertRoot(self, token):
        element = self.createElement(token)
        self.openElements.append(element)
        self.document.appendChild(element)

    def insertDoctype(self, token):
        name = token["name"]
        publicId = token["publicId"]
        systemId = token["systemId"]

        doctype = self.doctypeClass(name, publicId, systemId)
        self.document.appendChild(doctype)

    def insertComment(self, token, parent=None):
        if parent is None:
            parent = self.openElements[-1]
        parent.appendChild(self.commentClass(token["data"]))

    def createElement(self, token):
        """Create an element but don't insert it anywhere"""
        name = token["name"]
        namespace = token.get("namespace", self.defaultNamespace)
        element = self.elementClass(name, namespace)
        element.attributes = token["data"]
        return element

    def _getInsertFromTable(self):
        return self._insertFromTable

    def _setInsertFromTable(self, value):
        """Switch the function used to insert an element from the
        normal one to the misnested table one and back again"""
        self._insertFromTable = value
        if value:
            self.insertElement = self.insertElementTable
        else:
            self.insertElement = self.insertElementNormal

    insertFromTable = property(_getInsertFromTable, _setInsertFromTable)

    def insertElementNormal(self, token):
        name = token["name"]
        assert isinstance(name, text_type), "Element %s not unicode" % name
        namespace = token.get("namespace", self.defaultNamespace)
        element = self.elementClass(name, namespace)
        element.attributes = token["data"]
        self.openElements[-1].appendChild(element)
        self.openElements.append(element)
        return element

    def insertElementTable(self, token):
        """Create an element and insert it into the tree"""
        element = self.createElement(token)
        if self.openElements[-1].name not in tableInsertModeElements:
            return self.insertElementNormal(token)
        else:
            # We should be in the InTable mode. This means we want to do
            # special magic element rearranging
            parent, insertBefore = self.getTableMisnestedNodePosition()
            if insertBefore is None:
                parent.appendChild(element)
            else:
                parent.insertBefore(element, insertBefore)
            self.openElements.append(element)
        return element

    def insertText(self, data, parent=None):
        """Insert text data."""
        if parent is None:
            parent = self.openElements[-1]

        if (not self.insertFromTable or (self.insertFromTable and
                                         self.openElements[-1].name
                                         not in tableInsertModeElements)):
            parent.insertText(data)
        else:
            # We should be in the InTable mode. This means we want to do
            # special magic element rearranging
            parent, insertBefore = self.getTableMisnestedNodePosition()
            parent.insertText(data, insertBefore)

    def getTableMisnestedNodePosition(self):
        """Get the foster parent element, and sibling to insert before
        (or None) when inserting a misnested table node"""
        # The foster parent element is the one which comes before the most
        # recently opened table element
        # XXX - this is really inelegant
        lastTable = None
        fosterParent = None
        insertBefore = None
        for elm in self.openElements[::-1]:
            if elm.name == "table":
                lastTable = elm
                break
        if lastTable:
            # XXX - we should really check that this parent is actually a
            # node here
            if lastTable.parent:
                fosterParent = lastTable.parent
                insertBefore = lastTable
            else:
                fosterParent = self.openElements[
                    self.openElements.index(lastTable) - 1]
        else:
            fosterParent = self.openElements[0]
        return fosterParent, insertBefore

    def generateImpliedEndTags(self, exclude=None):
        name = self.openElements[-1].name
        # XXX td, th and tr are not actually needed
        if (name in frozenset(("dd", "dt", "li", "option", "optgroup", "p", "rp", "rt")) and
                name != exclude):
            self.openElements.pop()
            # XXX This is not entirely what the specification says. We should
            # investigate it more closely.
            self.generateImpliedEndTags(exclude)

    def getDocument(self):
        """Return the final tree"""
        return self.document

    def getFragment(self):
        """Return the final fragment"""
        # assert self.innerHTML
        fragment = self.fragmentClass()
        self.openElements[0].reparentChildren(fragment)
        return fragment

    def testSerializer(self, node):
        """Serialize the subtree of node in the format required by unit tests

        :arg node: the node from which to start serializing

        """
        raise NotImplementedError
b IDATxytVսϓ22 A@IR :hCiZ[v*E:WũZA ^dQeQ @ !jZ'>gsV仿$|?g)&x-EIENT ;@xT.i%-X}SvS5.r/UHz^_$-W"w)Ɗ/@Z &IoX P$K}JzX:;` &, ŋui,e6mX ԵrKb1ԗ)DADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADA݀!I*]R;I2$eZ#ORZSrr6mteffu*((Pu'v{DIߔ4^pIm'77WEEE;vƎ4-$]'RI{\I&G :IHJ DWBB=\WR޽m o$K(V9ABB.}jѢv`^?IOȅ} ڶmG}T#FJ`56$-ھ}FI&v;0(h;Б38CӧOWf!;A i:F_m9s&|q%=#wZprrrla A &P\\СC[A#! {olF} `E2}MK/vV)i{4BffV\|ۭX`b@kɶ@%i$K z5zhmX[IXZ` 'b%$r5M4º/l ԃߖxhʔ)[@=} K6IM}^5k㏷݆z ΗÿO:gdGBmyT/@+Vɶ纽z񕏵l.y޴it뭷zV0[Y^>Wsqs}\/@$(T7f.InݺiR$푔n.~?H))\ZRW'Mo~v Ov6oԃxz! S,&xm/yɞԟ?'uaSѽb,8GלKboi&3t7Y,)JJ c[nzӳdE&KsZLӄ I?@&%ӟ۶mSMMњ0iؐSZ,|J+N ~,0A0!5%Q-YQQa3}$_vVrf9f?S8`zDADADADADADADADADAdqP,تmMmg1V?rSI꒟]u|l RCyEf٢9 jURbztѰ!m5~tGj2DhG*{H9)꒟ר3:(+3\?/;TUݭʴ~S6lڧUJ*i$d(#=Yݺd{,p|3B))q:vN0Y.jkק6;SɶVzHJJЀ-utѹսk>QUU\޲~]fFnK?&ߡ5b=z9)^|u_k-[y%ZNU6 7Mi:]ۦtk[n X(e6Bb."8cۭ|~teuuw|ήI-5"~Uk;ZicEmN/:]M> cQ^uiƞ??Ңpc#TUU3UakNwA`:Y_V-8.KKfRitv޲* 9S6ֿj,ՃNOMߤ]z^fOh|<>@Å5 _/Iu?{SY4hK/2]4%it5q]GGe2%iR| W&f*^]??vq[LgE_3f}Fxu~}qd-ږFxu~I N>\;͗O֊:̗WJ@BhW=y|GgwܷH_NY?)Tdi'?խwhlmQi !SUUsw4kӺe4rfxu-[nHtMFj}H_u~w>)oV}(T'ebʒv3_[+vn@Ȭ\S}ot}w=kHFnxg S 0eޢm~l}uqZfFoZuuEg `zt~? b;t%>WTkķh[2eG8LIWx,^\thrl^Ϊ{=dž<}qV@ ⠨Wy^LF_>0UkDuʫuCs$)Iv:IK;6ֲ4{^6եm+l3>݆uM 9u?>Zc }g~qhKwڭeFMM~pМuqǿz6Tb@8@Y|jx](^]gf}M"tG -w.@vOqh~/HII`S[l.6nØXL9vUcOoB\xoǤ'T&IǍQw_wpv[kmO{w~>#=P1Pɞa-we:iǏlHo׈꒟f9SzH?+shk%Fs:qVhqY`jvO'ρ?PyX3lх]˾uV{ݞ]1,MzYNW~̈́ joYn}ȚF߾׮mS]F z+EDxm/d{F{-W-4wY듏:??_gPf ^3ecg ҵs8R2מz@TANGj)}CNi/R~}c:5{!ZHӋӾ6}T]G]7W6^n 9*,YqOZj:P?Q DFL|?-^.Ɵ7}fFh׶xe2Pscz1&5\cn[=Vn[ĶE鎀uˌd3GII k;lNmشOuuRVfBE]ۣeӶu :X-[(er4~LHi6:Ѻ@ԅrST0trk%$Č0ez" *z"T/X9|8.C5Feg}CQ%͞ˣJvL/?j^h&9xF`њZ(&yF&Iݻfg#W;3^{Wo^4'vV[[K';+mӍִ]AC@W?1^{එyh +^]fm~iԵ]AB@WTk̏t uR?l.OIHiYyԶ]Aˀ7c:q}ힽaf6Z~қm(+sK4{^6}T*UUu]n.:kx{:2 _m=sAߤU@?Z-Vކеz왍Nэ{|5 pڶn b p-@sPg]0G7fy-M{GCF'%{4`=$-Ge\ eU:m+Zt'WjO!OAF@ik&t݆ϥ_ e}=]"Wz_.͜E3leWFih|t-wZۍ-uw=6YN{6|} |*={Ѽn.S.z1zjۻTH]흾 DuDvmvK.`V]yY~sI@t?/ϓ. m&["+P?MzovVЫG3-GRR[(!!\_,^%?v@ҵő m`Y)tem8GMx.))A]Y i`ViW`?^~!S#^+ѽGZj?Vģ0.))A꨷lzL*]OXrY`DBBLOj{-MH'ii-ϰ ok7^ )쭡b]UXSְmռY|5*cֽk0B7镹%ڽP#8nȎq}mJr23_>lE5$iwui+ H~F`IjƵ@q \ @#qG0".0" l`„.0! ,AQHN6qzkKJ#o;`Xv2>,tێJJ7Z/*A .@fفjMzkg @TvZH3Zxu6Ra'%O?/dQ5xYkU]Rֽkق@DaS^RSּ5|BeHNN͘p HvcYcC5:y #`οb;z2.!kr}gUWkyZn=f Pvsn3p~;4p˚=ē~NmI] ¾ 0lH[_L hsh_ғߤc_њec)g7VIZ5yrgk̞W#IjӪv>՞y睝M8[|]\շ8M6%|@PZڨI-m>=k='aiRo-x?>Q.}`Ȏ:Wsmu u > .@,&;+!!˱tﭧDQwRW\vF\~Q7>spYw$%A~;~}6¾ g&if_=j,v+UL1(tWake:@Ș>j$Gq2t7S?vL|]u/ .(0E6Mk6hiۺzښOrifޱxm/Gx> Lal%%~{lBsR4*}{0Z/tNIɚpV^#Lf:u@k#RSu =S^ZyuR/.@n&΃z~B=0eg뺆#,Þ[B/?H uUf7y Wy}Bwegל`Wh(||`l`.;Ws?V@"c:iɍL֯PGv6zctM̠':wuW;d=;EveD}9J@B(0iհ bvP1{\P&G7D޴Iy_$-Qjm~Yrr&]CDv%bh|Yzni_ˆR;kg}nJOIIwyuL}{ЌNj}:+3Y?:WJ/N+Rzd=hb;dj͒suݔ@NKMԄ jqzC5@y°hL m;*5ezᕏ=ep XL n?מ:r`۵tŤZ|1v`V뽧_csج'ߤ%oTuumk%%%h)uy]Nk[n 'b2 l.=͜E%gf$[c;s:V-͞WߤWh-j7]4=F-X]>ZLSi[Y*We;Zan(ӇW|e(HNNP5[= r4tP &0<pc#`vTNV GFqvTi*Tyam$ߏWyE*VJKMTfFw>'$-ؽ.Ho.8c"@DADADADADADADADADA~j*֘,N;Pi3599h=goضLgiJ5փy~}&Zd9p֚ e:|hL``b/d9p? fgg+%%hMgXosج, ΩOl0Zh=xdjLmhݻoO[g_l,8a]٭+ӧ0$I]c]:粹:Teꢢ"5a^Kgh,&= =՟^߶“ߢE ܹS J}I%:8 IDAT~,9/ʃPW'Mo}zNƍ쨓zPbNZ~^z=4mswg;5 Y~SVMRXUյڱRf?s:w ;6H:ºi5-maM&O3;1IKeamZh͛7+##v+c ~u~ca]GnF'ټL~PPPbn voC4R,ӟgg %hq}@#M4IÇ Oy^xMZx ) yOw@HkN˖-Sǎmb]X@n+i͖!++K3gd\$mt$^YfJ\8PRF)77Wא!Cl$i:@@_oG I{$# 8磌ŋ91A (Im7֭>}ߴJq7ޗt^ -[ԩSj*}%]&' -ɓ'ꫯVzzvB#;a 7@GxI{j޼ƌ.LÇWBB7`O"I$/@R @eee@۷>}0,ɒ2$53Xs|cS~rpTYYY} kHc %&k.], @ADADADADADADADADA@lT<%''*Lo^={رc5h %$+CnܸQ3fҥK}vUVVs9G R,_{xˇ3o߾;TTTd}馛]uuuG~iԩ@4bnvmvfϞ /Peeeq}}za I~,誫{UWW뮻}_~YƍSMMMYχ֝waw\ďcxꩧtEƍկ_?۷5@u?1kNׯWzz/wy>}zj3 k(ٺuq_Zvf̘:~ ABQ&r|!%KҥKgԞ={<_X-z !CyFUUz~ ABQIIIjݺW$UXXDٳZ~ ABQƍecW$<(~<RSSvZujjjԧOZQu@4 8m&&&jԩg$ď1h ͟?_{768@g =@`)))5o6m3)ѣƌJ;wҿUTT /KZR{~a=@0o<*狔iFɶ[ˎ;T]]OX@?K.ۈxN pppppppppppppppppPfl߾] ,{ァk۶mڿo5BTӦMӴiӴ|r DB2e|An!Dy'tkΝ[A $***t5' "!駟oaDnΝ:t֭[gDШQ06qD;@ x M6v(PiizmZ4ew"@̴ixf [~-Fٱc&IZ2|n!?$@{[HTɏ#@hȎI# _m(F /6Z3z'\r,r!;w2Z3j=~GY7"I$iI.p_"?pN`y DD?: _  Gÿab7J !Bx@0 Bo cG@`1C[@0G @`0C_u V1 aCX>W ` | `!<S `"<. `#c`?cAC4 ?c p#~@0?:08&_MQ1J h#?/`7;I  q 7a wQ A 1 Hp !#<8/#@1Ul7=S=K.4Z?E_$i@!1!E4?`P_  @Bă10#: "aU,xbFY1 [n|n #'vEH:`xb #vD4Y hi.i&EΖv#O H4IŶ}:Ikh @tZRF#(tXҙzZ ?I3l7q@õ|ۍ1,GpuY Ꮿ@hJv#xxk$ v#9 5 }_$c S#=+"K{F*m7`#%H:NRSp6I?sIՖ{Ap$I$I:QRv2$Z @UJ*$]<FO4IENDB`