summaryrefslogtreecommitdiffstats
path: root/util/local_database/xpathlite.py
blob: 95e67110db38a7f209401261b4ab2f12fc3c5faf (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
#!/usr/bin/env python
#############################################################################
##
## Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
## All rights reserved.
## Contact: Nokia Corporation (qt-info@nokia.com)
##
## This file is part of the test suite of the Qt Toolkit.
##
## $QT_BEGIN_LICENSE:LGPL$
## No Commercial Usage
## This file contains pre-release code and may not be distributed.
## You may use this file in accordance with the terms and conditions
## contained in the Technology Preview License Agreement accompanying
## this package.
##
## GNU Lesser General Public License Usage
## Alternatively, this file may be used under the terms of the GNU Lesser
## General Public License version 2.1 as published by the Free Software
## Foundation and appearing in the file LICENSE.LGPL included in the
## packaging of this file.  Please review the following information to
## ensure the GNU Lesser General Public License version 2.1 requirements
## will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
##
## In addition, as a special exception, Nokia gives you certain additional
## rights.  These rights are described in the Nokia Qt LGPL Exception
## version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
##
## If you have questions regarding the use of this file, please contact
## Nokia at qt-info@nokia.com.
##
##
##
##
##
##
##
##
## $QT_END_LICENSE$
##
#############################################################################

import sys
import os
import xml.dom.minidom

doc_cache = {}

class DraftResolution:
    # See http://www.unicode.org/cldr/process.html for description
    unconfirmed = 'unconfirmed'
    provisional = 'provisional'
    contributed = 'contributed'
    approved = 'approved'
    _values = { unconfirmed : 1, provisional : 2, contributed : 3, approved : 4 }
    def __init__(self, resolution):
        self.resolution = resolution
    def toInt(self):
        return DraftResolution._values[self.resolution]

class Error:
    def __init__(self, msg):
        self.msg = msg
    def __str__(self):
        return self.msg

def findChild(parent, tag_name, arg_name=None, arg_value=None, draft=None):
    for node in parent.childNodes:
        if node.nodeType != node.ELEMENT_NODE:
            continue
        if node.nodeName != tag_name:
            continue
        if arg_value:
            if not node.attributes.has_key(arg_name):
                continue
            if node.attributes[arg_name].nodeValue != arg_value:
                continue
        if draft:
            if not node.attributes.has_key('draft'):
                # if draft is not specified then it's approved
                return node
            value = node.attributes['draft'].nodeValue
            value = DraftResolution(value).toInt()
            exemplar = DraftResolution(draft).toInt()
            if exemplar > value:
                continue
        return node
    return False

def _findEntryInFile(file, path, draft=None, attribute=None):
    doc = False
    if doc_cache.has_key(file):
        doc = doc_cache[file]
    else:
        doc = xml.dom.minidom.parse(file)
        doc_cache[file] = doc

    elt = doc.documentElement
    tag_spec_list = path.split("/")
    last_entry = None
    for i in range(len(tag_spec_list)):
        tag_spec = tag_spec_list[i]
        tag_name = tag_spec
        arg_name = 'type'
        arg_value = ''
        left_bracket = tag_spec.find('[')
        if left_bracket != -1:
            tag_name = tag_spec[:left_bracket]
            arg_value = tag_spec[left_bracket+1:-1].split("=")
            if len(arg_value) == 2:
                arg_name = arg_value[0]
                arg_value = arg_value[1]
            else:
                arg_value = arg_value[0]
        alias = findChild(elt, 'alias')
        if alias and alias.attributes['source'].nodeValue == 'locale':
            path = alias.attributes['path'].nodeValue
            aliaspath = tag_spec_list[:i] + path.split("/")
            def resolve(x, y):
                if y == '..':
                    return x[:-1]
                return x + [y]
            # resolve all dot-dot parts of the path
            aliaspath = reduce(resolve, aliaspath, [])
            # remove attribute specification that our xpathlite doesnt support
            aliaspath = map(lambda x: x.replace("@type=", "").replace("'", ""), aliaspath)
            # append the remaining path
            aliaspath = aliaspath + tag_spec_list[i:]
            aliaspath = "/".join(aliaspath)
            # "locale" aliases are special - we need to start lookup from scratch
            return (None, aliaspath)
        elt = findChild(elt, tag_name, arg_name, arg_value, draft)
        if not elt:
            return ("", None)
    if attribute is not None:
        if elt.attributes.has_key(attribute):
            return (elt.attributes[attribute].nodeValue, None)
        return (None, None)
    return (elt.firstChild.nodeValue, None)

def findAlias(file):
    if not doc_cache.has_key(file):
        return False
    doc = doc_cache[file]
    alias_elt = findChild(doc.documentElement, "alias")
    if not alias_elt:
        return False
    if not alias_elt.attributes.has_key('source'):
        return False
    return alias_elt.attributes['source'].nodeValue

def _findEntry(base, path, draft=None, attribute=None):
    file = base
    if base.endswith(".xml"):
        filename = base
        base = base[:-4]
    else:
        file = base + ".xml"
    (dirname, filename) = os.path.split(base)
    items = filename.split("_")
    # split locale name into items and iterate through them from back to front
    # example: az_Latn_AZ => [az_Latn_AZ, az_Latn, az]
    items = reversed(map(lambda x: "_".join(items[:x+1]), range(len(items))))
    for item in items:
        file = dirname + "/" + item + ".xml"
        if os.path.isfile(file):
            alias = findAlias(file)
            if alias:
                # if alias is found we should follow it and stop processing current file
                # see http://www.unicode.org/reports/tr35/#Common_Elements
                aliasfile = os.path.dirname(file) + "/" + alias + ".xml"
                if not os.path.isfile(aliasfile):
                    raise Error("findEntry: fatal error: found an alias '%s' to '%s', but the alias file couldnt be found" % (filename, alias))
                # found an alias, recurse into parsing it
                result = _findEntry(aliasfile, path, draft, attribute)
                return result
            (result, aliaspath) = _findEntryInFile(file, path, draft, attribute)
            if aliaspath:
                # start lookup again because of the alias source="locale"
                return _findEntry(base, aliaspath, draft, attribute)
            if result:
                return result
    return None

def findEntry(base, path, draft=None, attribute=None):
    file = base
    if base.endswith(".xml"):
        file = base
        base = base[:-4]
    else:
        file = base + ".xml"
    (dirname, filename) = os.path.split(base)

    result = None
    while path:
        result = _findEntry(base, path, draft, attribute)
        if result:
            return result
        (result, aliaspath) = _findEntryInFile(dirname + "/root.xml", path, draft, attribute)
        if result:
            return result
        if not aliaspath:
            raise Error("findEntry: fatal error: %s: did not found key %s" % (filename, path))
        path = aliaspath

    return result