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annotate core/src/luan/modules/Html.luan @ 625:a3c1e11fb6aa

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rewrite much of Html to be more understandable; add Lucene html_highlighter();
author Franklin Schmidt <fschmidt@gmail.com>
date Tue, 12 Jan 2016 23:52:56 -0700
parents 195a64f948f2
children ca169567ce07
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1 java()
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2 local HtmlLuan = require "java:luan.modules.HtmlLuan"
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3 local HtmlParser = require "java:luan.modules.parsers.Html"
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4 local URLEncoder = require "java:java.net.URLEncoder"
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5 local Luan = require "luan:Luan"
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6 local error = Luan.error
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7 local ipairs = Luan.ipairs or error()
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8 local pairs = Luan.pairs or error()
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9 local type = Luan.type or error()
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10 local Io = require "luan:Io"
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11 local output_of = Io.output_of or error()
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12
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14 local M = {}
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15
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16 M.encode = HtmlLuan.encode
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17
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18 local quote = HtmlLuan.quote
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19 M.quote = quote
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20
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21 function M.parse(text,container_tags)
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22 text or error "text required"
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23 container_tags = container_tags or {"script","style","textarea"}
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24 return HtmlParser.toList(text,container_tags)
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25 end
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26
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27 function M.url_encode(s)
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28 return URLEncoder.encode(s,"UTF-8")
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29 end
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30
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31 local function output_tag(tag)
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32 %><<%= tag.name %><%
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33 local attributes = tag.attributes
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34 for name, value in pairs(attributes) do
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35 %> <%= name %><%
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36 if value ~= true then
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37 %>=<%= quote(value) %><%
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38 end
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39 end
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40 if tag.is_empty then
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41 %>/<%
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42 end
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43 %>><%
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44 end
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45
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46 function M.to_string(list)
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47 return output_of( function()
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48 for _, obj in ipairs(list) do
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49 local tp = type(obj)
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50 if tp == "string" then
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51 %><%= obj %><%
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52 elseif tp == "table" then
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53 tp = obj.type
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54 if tp == nil then
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55 error "no type in element of table for 'Html.to_string'"
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56 elseif tp == "comment" then
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57 %><!--<%= obj.text %>--><%
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58 elseif tp == "cdata" then
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59 %><![CDATA[<%= obj.text %>]]><%
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60 elseif tp == "tag" then
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61 output_tag(obj)
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62 elseif tp == "container" then
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63 local tag = obj.tag
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64 output_tag(tag)
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65 %><%= obj.text %></<%= tag.name %>><%
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66 else
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67 error "invalid element type for 'Html.to_string'"
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68 end
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69 else
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70 error("invalid value ("..tp..") in list for 'Html.to_string'")
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71 end
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72 end
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73 end )
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74 end
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75
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76 return M