author | Waqas Hussain <waqas20@gmail.com> |
Fri, 26 Nov 2010 05:26:12 +0500 | |
changeset 3640 | 4bc88bb748d1 |
parent 3637 | bd491def3efb |
child 4495 | c0f5c78cb817 |
permissions | -rw-r--r-- |
3545
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
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1 |
|
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
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|
2 |
local st = require "util.stanza"; |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
3 |
local lxp = require "lxp"; |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
4 |
local setmetatable = setmetatable; |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
5 |
local pairs = pairs; |
3637
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
6 |
local ipairs = ipairs; |
3545
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
7 |
local error = error; |
3637
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
8 |
local loadstring = loadstring; |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
9 |
local debug = debug; |
3545
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
10 |
|
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
11 |
module("template") |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
12 |
|
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
13 |
local parse_xml = (function() |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
14 |
local ns_prefixes = { |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
15 |
["http://www.w3.org/XML/1998/namespace"] = "xml"; |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
16 |
}; |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
17 |
local ns_separator = "\1"; |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
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|
18 |
local ns_pattern = "^([^"..ns_separator.."]*)"..ns_separator.."?(.*)$"; |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
19 |
return function(xml) |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
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|
20 |
local handler = {}; |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
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|
21 |
local stanza = st.stanza("root"); |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
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|
22 |
function handler:StartElement(tagname, attr) |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
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|
23 |
local curr_ns,name = tagname:match(ns_pattern); |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
24 |
if name == "" then |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
25 |
curr_ns, name = "", curr_ns; |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
26 |
end |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
27 |
if curr_ns ~= "" then |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
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|
28 |
attr.xmlns = curr_ns; |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
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29 |
end |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
30 |
for i=1,#attr do |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
31 |
local k = attr[i]; |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
32 |
attr[i] = nil; |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
33 |
local ns, nm = k:match(ns_pattern); |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
34 |
if nm ~= "" then |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
35 |
ns = ns_prefixes[ns]; |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
36 |
if ns then |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
37 |
attr[ns..":"..nm] = attr[k]; |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
38 |
attr[k] = nil; |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
39 |
end |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
40 |
end |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
41 |
end |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
42 |
stanza:tag(name, attr); |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
43 |
end |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
44 |
function handler:CharacterData(data) |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
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|
45 |
data = data:gsub("^%s*", ""):gsub("%s*$", ""); |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
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46 |
stanza:text(data); |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
47 |
end |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
48 |
function handler:EndElement(tagname) |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
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49 |
stanza:up(); |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
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|
50 |
end |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
51 |
local parser = lxp.new(handler, "\1"); |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
52 |
local ok, err, line, col = parser:parse(xml); |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
53 |
if ok then ok, err, line, col = parser:parse(); end |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
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|
54 |
--parser:close(); |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
55 |
if ok then |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
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56 |
return stanza.tags[1]; |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
57 |
else |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
58 |
return ok, err.." (line "..line..", col "..col..")"; |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
59 |
end |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
60 |
end; |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
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61 |
end)(); |
c85f9a4ae1c4
util.template: Initial commit. A template library for XML stanzas.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
62 |
|
3637
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
63 |
local function create_string_string(str) |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
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64 |
str = ("%q"):format(str); |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
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65 |
str = str:gsub("{([^}]*)}", function(s) |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
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66 |
return '"..(data["'..s..'"]or"").."'; |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
67 |
end); |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
68 |
return str; |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
69 |
end |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
70 |
local function create_attr_string(attr, xmlns) |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
71 |
local str = '{'; |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
72 |
for name,value in pairs(attr) do |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
73 |
if name ~= "xmlns" or value ~= xmlns then |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
74 |
str = str..("[%q]=%s;"):format(name, create_string_string(value)); |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
75 |
end |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
76 |
end |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
77 |
return str..'}'; |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
78 |
end |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
79 |
local function create_clone_string(stanza, lookup, xmlns) |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
80 |
if not lookup[stanza] then |
3640
4bc88bb748d1
util.template: Don't add stanza.last_add. 20% faster.
Waqas Hussain <waqas20@gmail.com>
parents:
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81 |
local s = ('setmetatable({name=%q,attr=%s,tags={'):format(stanza.name, create_attr_string(stanza.attr, xmlns)); |
3637
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
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82 |
-- add tags |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
83 |
for i,tag in ipairs(stanza.tags) do |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
84 |
s = s..create_clone_string(tag, lookup, stanza.attr.xmlns)..";"; |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
85 |
end |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
86 |
s = s..'};'; |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
87 |
-- add children |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
88 |
for i,child in ipairs(stanza) do |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
89 |
if child.name then |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
90 |
s = s..create_clone_string(child, lookup, stanza.attr.xmlns)..";"; |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
91 |
else |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
92 |
s = s..create_string_string(child)..";" |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
93 |
end |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
94 |
end |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
95 |
s = s..'}, stanza_mt)'; |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
96 |
s = s:gsub('%.%.""', ""):gsub('([=;])""%.%.', "%1"):gsub(';"";', ";"); -- strip empty strings |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
97 |
local n = #lookup + 1; |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
98 |
lookup[n] = s; |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
99 |
lookup[stanza] = "_"..n; |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
100 |
end |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
101 |
return lookup[stanza]; |
bd491def3efb
util.template: Rewritten to be much faster than the util.stanza stanza building API.
Waqas Hussain <waqas20@gmail.com>
parents:
3546
diff
changeset
|
102 |
end |
3546
cb1600dea3ad
util.template: Optimized to be almost as fast as manual stanza building.
Waqas Hussain <waqas20@gmail.com>
parents:
3545
diff
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103 |
local stanza_mt = st.stanza_mt; |
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104 |
local function create_cloner(stanza, chunkname) |
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105 |
local lookup = {}; |
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106 |
local name = create_clone_string(stanza, lookup, ""); |
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107 |
local f = "local setmetatable,stanza_mt=...;return function(data)"; |
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parents:
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108 |
for i=1,#lookup do |
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109 |
f = f.."local _"..i.."="..lookup[i]..";"; |
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110 |
end |
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111 |
f = f.."return "..name..";end"; |
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112 |
local f,err = loadstring(f, chunkname); |
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113 |
if not f then error(err); end |
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parents:
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114 |
return f(setmetatable, stanza_mt); |
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115 |
end |
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116 |
|
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117 |
local template_mt = { __tostring = function(t) return t.name end }; |
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118 |
local function create_template(templates, text) |
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119 |
local stanza, err = parse_xml(text); |
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120 |
if not stanza then error(err); end |
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121 |
|
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122 |
local info = debug.getinfo(3, "Sl"); |
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123 |
info = info and ("template(%s:%d)"):format(info.short_src:match("[^\\/]*$"), info.currentline) or "template(unknown)"; |
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124 |
|
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125 |
local template = setmetatable({ apply = create_cloner(stanza, info), name = info, text = text }, template_mt); |
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126 |
templates[text] = template; |
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127 |
return template; |
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128 |
end |
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129 |
|
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130 |
local templates = setmetatable({}, { __mode = 'k', __index = create_template }); |
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131 |
return function(text) |
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132 |
return templates[text]; |
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133 |
end; |