2 * (C) Copyright 2009 David Kettler
4 * Use, modification, and distribution are subject to the terms specified in the
7 * Construct a webjump (with completer) to visit URLs referenced from
8 * an index page. An xpath expression is used to extract the indexed
9 * URLs. A specialized form is also provided for gitweb summary
15 require("webjump.js");
17 /* Objects with completion data for index webjumps. */
20 define_variable("index_webjumps_directory", null,
21 "A directory (instance of nsILocalFile) for storing the " +
22 "index files corresponding to index webjumps; the index " +
23 "data can be downloaded from the index URL using " +
24 "webjump-get-index. " +
25 "If the index file is available for an index webjump then " +
26 "the webjump will provide completions for the indexed URLs.");
28 define_variable("index_xpath_webjump_tidy_command",
29 "tidy -asxhtml -wrap 0 -numeric --clean yes" +
30 " -modify -quiet --show-warnings no",
31 "A command to run on the downloaded index. The xulrunner " +
32 "parser is quite fussy and specifically requires xhtml (or " +
33 "other xml). Running something like html tidy can avoid " +
36 function index_webjump(key, url, file) {
39 this.file = this.canonicalize_file(file);
41 if (this.require_completions && !this.file)
42 throw interactive_error("Index file not defined for " + this.key);
44 index_webjump.prototype = {
45 constructor : index_webjump,
49 make_completion : null,
50 require_completions : false,
55 /* Extract full completion list from index file. */
56 extract_completions : function () {
57 /* Parse the index file. */
58 var stream = Cc["@mozilla.org/network/file-input-stream;1"]
59 .createInstance(Ci.nsIFileInputStream);
60 stream.init(this.file, MODE_RDONLY, 0644, false);
61 var parser = Cc["@mozilla.org/xmlextras/domparser;1"]
62 .createInstance(Ci.nsIDOMParser);
63 // todo: catch parser errors
64 var doc = parser.parseFromStream(stream, null,
65 this.file.fileSize, this.mime_type);
67 /* Extract the completion items. */
68 var cmpl = [], node, res;
70 this.xpath_expr, doc, xpath_lookup_namespace,
71 Ci.nsIDOMXPathResult.UNORDERED_NODE_ITERATOR_TYPE, null);
72 while ((node = res.iterateNext()))
73 cmpl.push(this.make_completion(node));
75 cmpl.sort(function(a, b) {
76 if (a[1] < b[1]) return -1;
77 if (a[1] > b[1]) return 1;
78 if (a[0] < b[0]) return -1;
79 if (a[0] > b[0]) return 1;
83 this.completions = cmpl;
86 /* The guts of the completer. */
87 internal_completer : function (input, pos, conservative) {
88 if (pos == 0 && conservative)
89 yield co_return(undefined);
91 let require = this.require_completions;
93 /* Update full completion list if necessary. */
94 if (require && !this.file.exists())
95 throw interactive_error("Index file missing for " + this.key);
96 if (this.file.exists() &&
97 this.file.lastModifiedTime > this.file_time) {
98 this.file_time = this.file.lastModifiedTime;
99 this.extract_completions();
101 if (require && !(this.completions && this.completions.length))
102 throw interactive_error("No completions for " + this.key);
103 if (!this.completions)
104 yield co_return(null);
106 /* Match completions against input. */
107 let words = trim_whitespace(input.toLowerCase()).split(/\s+/);
108 let data = this.completions.filter(function (x) {
109 for (var i = 0; i < words.length; ++i)
110 if (x[0].toLowerCase().indexOf(words[i]) == -1 &&
111 x[1].toLowerCase().indexOf(words[i]) == -1)
116 let c = { count: data.length,
117 get_string: function (i) data[i][0],
118 get_description: function (i) data[i][1],
119 get_input_state: function (i) [data[i][0]],
120 get_match_required: function() require
125 /* A completer suitable for supplying to define_webjump. */
126 make_completer : function() {
130 return function (input, pos, conservative) {
131 return jmp.internal_completer(input, pos, conservative);
135 /* Fetch and save the index for later use with completion.
136 * (buffer is used only to associate with the download) */
137 get_index : function (buffer) {
139 throw interactive_error("Index file not defined for " + this.key);
141 var info = save_uri(load_spec(this.url), this.file,
142 $buffer = buffer, $use_cache = false,
145 // Note: it would be better to run this before the temp file
146 // is renamed; that requires support in save_uri.
147 if (this.tidy_command)
148 info.set_shell_command(this.tidy_command, index_webjumps_directory);
151 /* Try to make a suitable file object when the supplied file is a
153 canonicalize_file : function (file) {
154 if (typeof file == 'string')
155 file = make_file(file);
156 if (!file && index_webjumps_directory) {
157 file = Cc["@mozilla.org/file/local;1"]
158 .createInstance(Ci.nsILocalFile);
159 file.initWithFile(index_webjumps_directory);
160 file.appendRelativePath(this.key + ".index");
167 function index_webjump_xhtml(key, url, file, xpath_expr) {
168 index_webjump.call(this, key, url, file);
169 this.xpath_expr = xpath_expr;
171 index_webjump_xhtml.prototype = {
172 constructor : index_webjump_xhtml,
174 require_completions : true,
175 mime_type : "application/xhtml+xml",
176 tidy_command : index_xpath_webjump_tidy_command,
178 make_completion : function (node) {
179 return [makeURLAbsolute(this.url, node.href), node.text];
182 make_handler : function () {
184 return function (term) {
185 if (!(jmp.completions && jmp.completions.length))
186 throw interactive_error("Completions required for " + this.key);
191 __proto__ : index_webjump.prototype
195 function index_webjump_gitweb(key, url, file) {
196 index_webjump.call(this, key, url, file);
198 index_webjump_gitweb.prototype = {
199 constructor : index_webjump_gitweb,
201 mime_type : "text/xml",
202 xpath_expr : '//outline[@type="rss"]',
204 make_completion : function (node) {
205 var name = node.getAttribute("text");
206 return [name.replace(/\.git$/, ""), ""];
209 __proto__ : index_webjump.prototype
213 interactive("webjump-get-index",
214 "Fetch and save the index URL corresponding to an index " +
215 "webjump. It will then be available to the completer.",
217 var completions = [];
218 for (let i in index_webjumps)
222 var key = yield I.minibuffer.read(
223 $prompt = "Fetch index for index webjump:",
224 $history = "webjump",
226 all_word_completer($completions = completions),
227 $match_required = true);
229 var jmp = index_webjumps[key];
231 jmp.get_index(I.buffer);
235 * Construct a webjump to visit URLs referenced from an index page.
237 * The index page must be able to be parsed as xhtml. The anchor
238 * nodes indexed are those that match the given xpath_expr. Don't
239 * forget to use xhtml: prefixes on the xpath steps.
241 * If an alternative is not specified then it is set to the index page.
243 * A completer is provided that uses the index page. A local file for
244 * the index must be specified either with $index_file or via
245 * index_webjumps_directory. The index must be manually downloaded;
246 * eg. using webjump-get-index. Each time the completer is used it
247 * will check if the file has been updated and reload if necessary.
248 * This kind of webjump is not useful without the completions.
250 define_keywords("$alternative", "$index_file", "$description");
251 function define_xpath_webjump(key, index_url, xpath_expr) {
253 let alternative = arguments.$alternative || index_url;
255 var jmp = new index_webjump_xhtml(key, index_url, arguments.$index_file,
257 index_webjumps[key] = jmp;
259 define_webjump(key, jmp.make_handler(),
260 $completer = jmp.make_completer(),
261 $alternative = alternative,
262 $description = arguments.$description);
266 * Modify the xpath for an index webjump and show the resulting
267 * completions. Useful for figuring out an appropriate xpath. Either
268 * run using mozrepl or eval in the browser with the dump parameter
271 function index_webjump_try_xpath(key, xpath_expr, dump) {
272 jmp = index_webjumps[key];
274 jmp.xpath_expr = xpath_expr;
275 jmp.extract_completions();
277 dumpln(dump_obj(jmp.completions,
278 "Completions for index webjump " + key));
279 return jmp.completions;
284 * Construct a webjump to visit repository summary pages at a gitweb
287 * If a repository name is supplied as $default then the alternative
288 * url is set to that repository at the gitweb site. If an
289 * alternative is not specified by either $default or $alternative
290 * then it is set to the repository list page of the gitweb site.
292 * A completer is provided that uses the list of repositories from the
293 * OPML data on the gitweb server. The completer is setup in the same
294 * way as for define_xpath_webjump, but the webjump will work without
297 define_keywords("$default", "$alternative", "$opml_file", "$description");
298 function define_gitweb_summary_webjump(key, base_url) {
300 let alternative = arguments.$alternative;
301 let gitweb_url = base_url + "/gitweb.cgi";
302 let summary_url = gitweb_url + "?p=%s.git;a=summary";
303 let opml_url = gitweb_url + "?a=opml";
305 if (arguments.$default)
306 alternative = summary_url.replace("%s", arguments.$default);
308 alternative = gitweb_url;
310 var jmp = new index_webjump_gitweb(key, opml_url, arguments.$opml_file);
311 index_webjumps[key] = jmp;
313 define_webjump(key, summary_url,
314 $completer = jmp.make_completer(),
315 $alternative = alternative,
316 $description = arguments.$description);
319 provide("index-webjump");