Commit | Line | Data |
---|---|---|
b239aa23 FT |
1 | import StringIO |
2 | from wrw import dispatch | |
ff79cdbf FT |
3 | import cons |
4 | ||
5 | def findnsnames(el): | |
6 | names = {} | |
7 | nid = [1] | |
8 | def proc(el): | |
9 | if isinstance(el, cons.element): | |
10 | if el.ns not in names: | |
11 | names[el.ns] = u"n" + unicode(nid[0]) | |
12 | nid[:] = [nid[0] + 1] | |
13 | for ch in el.children: | |
14 | proc(ch) | |
15 | proc(el) | |
16 | if None in names: | |
17 | names[None] = None | |
18 | else: | |
19 | names[el.ns] = None | |
20 | return names | |
21 | ||
22 | class formatter(object): | |
23 | def __init__(self, out, root, nsnames=None, charset="utf-8", doctype=None): | |
24 | self.root = root | |
25 | if nsnames is None: | |
26 | nsnames = findnsnames(root) | |
27 | self.nsnames = nsnames | |
28 | self.out = out | |
29 | self.charset = charset | |
30 | self.doctype = doctype | |
31 | ||
32 | def write(self, text): | |
33 | self.out.write(text.encode(self.charset)) | |
34 | ||
35 | def quotewrite(self, buf): | |
36 | for ch in buf: | |
37 | if ch == u'&': | |
38 | self.write(u"&") | |
39 | elif ch == u'<': | |
40 | self.write(u"<") | |
41 | elif ch == u'>': | |
42 | self.write(u">") | |
43 | else: | |
44 | self.write(ch) | |
45 | ||
46 | def text(self, el): | |
47 | self.quotewrite(el) | |
48 | ||
f3464a4a FT |
49 | def rawcode(self, el): |
50 | self.write(el) | |
51 | ||
ff79cdbf FT |
52 | def attrval(self, buf): |
53 | qc, qt = (u"'", u"'") if u'"' in buf else (u'"', u""") | |
54 | self.write(qc) | |
55 | for ch in buf: | |
56 | if ch == u'&': | |
57 | self.write(u"&") | |
58 | elif ch == u'<': | |
59 | self.write(u"<") | |
60 | elif ch == u'>': | |
61 | self.write(u">") | |
62 | elif ch == qc: | |
63 | self.write(qt) | |
64 | else: | |
65 | self.write(ch) | |
66 | self.write(qc) | |
67 | ||
68 | def attr(self, k, v): | |
69 | self.write(k) | |
70 | self.write(u'=') | |
71 | self.attrval(v) | |
72 | ||
73 | def shorttag(self, el, **extra): | |
74 | self.write(u'<' + self.elname(el)) | |
75 | for k, v in el.attrs.iteritems(): | |
76 | self.write(u' ') | |
77 | self.attr(k, v) | |
78 | for k, v in extra.iteritems(): | |
79 | self.write(u' ') | |
80 | self.attr(k, v) | |
81 | self.write(u" />") | |
82 | ||
83 | def elname(self, el): | |
84 | ns = self.nsnames[el.ns] | |
85 | if ns is None: | |
86 | return el.name | |
87 | else: | |
88 | return ns + u':' + el.name | |
89 | ||
90 | def starttag(self, el, **extra): | |
91 | self.write(u'<' + self.elname(el)) | |
92 | for k, v in el.attrs.iteritems(): | |
93 | self.write(u' ') | |
94 | self.attr(k, v) | |
95 | for k, v in extra.iteritems(): | |
96 | self.write(u' ') | |
97 | self.attr(k, v) | |
98 | self.write(u'>') | |
99 | ||
100 | def endtag(self, el): | |
101 | self.write(u'</' + self.elname(el) + u'>') | |
102 | ||
762f4e48 | 103 | def longtag(self, el, **extra): |
ff79cdbf FT |
104 | self.starttag(el, **extra) |
105 | for ch in el.children: | |
106 | self.node(ch) | |
107 | self.endtag(el) | |
108 | ||
109 | def element(self, el, **extra): | |
110 | if len(el.children) == 0: | |
111 | self.shorttag(el, **extra) | |
112 | else: | |
113 | self.longtag(el, **extra) | |
114 | ||
115 | def node(self, el): | |
116 | if isinstance(el, cons.element): | |
117 | self.element(el) | |
118 | elif isinstance(el, cons.text): | |
119 | self.text(el) | |
f3464a4a FT |
120 | elif isinstance(el, cons.raw): |
121 | self.rawcode(el) | |
ff79cdbf FT |
122 | else: |
123 | raise Exception("Unknown object in element tree: " + el) | |
124 | ||
125 | def start(self): | |
126 | self.write(u'<?xml version="1.0" encoding="' + self.charset + u'" ?>\n') | |
127 | if self.doctype: | |
128 | self.write(u'<!DOCTYPE %s PUBLIC "%s" "%s">\n' % (self.root.name, | |
129 | self.doctype[0], | |
130 | self.doctype[1])) | |
131 | extra = {} | |
132 | for uri, nm in self.nsnames.iteritems(): | |
133 | if uri is None: | |
134 | continue | |
135 | if nm is None: | |
136 | extra[u"xmlns"] = uri | |
137 | else: | |
138 | extra[u"xmlns:" + nm] = uri | |
139 | self.element(self.root, **extra) | |
140 | ||
141 | @classmethod | |
142 | def output(cls, out, el, *args, **kw): | |
143 | cls(out=out, root=el, *args, **kw).start() | |
144 | ||
3f48e448 FT |
145 | @classmethod |
146 | def fragment(cls, out, el, *args, **kw): | |
b60c7ad2 | 147 | cls(out=out, root=el, *args, **kw).node(el) |
3f48e448 | 148 | |
b239aa23 FT |
149 | @classmethod |
150 | def format(cls, el, *args, **kw): | |
151 | buf = StringIO.StringIO() | |
152 | cls.output(buf, el, *args, **kw) | |
153 | return buf.getvalue() | |
154 | ||
ff79cdbf FT |
155 | def update(self, **ch): |
156 | ret = type(self).__new__(type(self)) | |
157 | ret.__dict__.update(self.__dict__) | |
158 | ret.__dict__.update(ch) | |
159 | return ret | |
160 | ||
161 | class iwriter(object): | |
162 | def __init__(self, out): | |
163 | self.out = out | |
164 | self.atbol = True | |
165 | self.col = 0 | |
166 | ||
167 | def write(self, buf): | |
168 | for c in buf: | |
169 | if c == '\n': | |
170 | self.col = 0 | |
171 | else: | |
172 | self.col += 1 | |
173 | self.out.write(c) | |
174 | self.atbol = False | |
175 | ||
176 | def indent(self, indent): | |
177 | if self.atbol: | |
178 | return | |
179 | if self.col != 0: | |
180 | self.write('\n') | |
181 | self.write(indent) | |
182 | self.atbol = True | |
183 | ||
184 | class indenter(formatter): | |
185 | def __init__(self, indent=u" ", *args, **kw): | |
186 | super(indenter, self).__init__(*args, **kw) | |
187 | self.out = iwriter(self.out) | |
188 | self.indent = indent | |
189 | self.curind = u"" | |
190 | ||
191 | def simple(self, el): | |
192 | for ch in el.children: | |
193 | if not isinstance(ch, cons.text): | |
194 | return False | |
195 | return True | |
196 | ||
197 | def longtag(self, el, **extra): | |
198 | self.starttag(el, **extra) | |
199 | sub = self | |
200 | reind = False | |
201 | if not self.simple(el): | |
202 | sub = self.update(curind=self.curind + self.indent) | |
ee213a9b | 203 | sub.reindent() |
ff79cdbf FT |
204 | reind = True |
205 | for ch in el.children: | |
206 | sub.node(ch) | |
207 | if reind: | |
ee213a9b | 208 | self.reindent() |
ff79cdbf FT |
209 | self.endtag(el) |
210 | ||
211 | def element(self, el, **extra): | |
212 | super(indenter, self).element(el, **extra) | |
213 | if self.out.col > 80 and self.simple(el): | |
ee213a9b FT |
214 | self.reindent() |
215 | ||
216 | def reindent(self): | |
217 | self.out.indent(self.curind.encode(self.charset)) | |
ff79cdbf FT |
218 | |
219 | def start(self): | |
220 | super(indenter, self).start() | |
221 | self.write('\n') | |
b239aa23 FT |
222 | |
223 | class response(dispatch.restart): | |
224 | charset = "utf-8" | |
225 | doctype = None | |
226 | formatter = indenter | |
227 | ||
228 | def __init__(self, root): | |
229 | super(response, self).__init__() | |
230 | self.root = root | |
231 | ||
232 | @property | |
233 | def ctype(self): | |
234 | raise Exception("a subclass of wrw.sp.util.response must override ctype") | |
235 | ||
236 | def handle(self, req): | |
237 | req.ohead["Content-Type"] = self.ctype | |
238 | return [self.formatter.format(self.root, doctype=self.doctype, charset=self.charset)] |