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https://github.com/GrammaticalFramework/gf-core.git
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f899d54057
To enable customized error handling, the methods in the pgf_online objects and the AJAX server call functions in support.js accept an error callback function as an extra argument, in addition to the callback (continuation) for normal results.
79 lines
2.5 KiB
JavaScript
79 lines
2.5 KiB
JavaScript
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/* --- Grammar access object ------------------------------------------------ */
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function pgf_online(options) {
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var server = {
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// State variables (private):
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grammars_url: "/grammars/",
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other_grammars_urls: [],
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grammar_list: null,
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current_grammar_url: null,
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// Methods:
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switch_grammar: function(grammar_url,cont) {
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this.current_grammar_url=this.grammars_url+grammar_url;
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if(cont) cont();
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},
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add_grammars_url: function(grammars_url,cont) {
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this.other_grammars_urls.push(grammars_url);
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if(cont) cont();
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},
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switch_to_other_grammar: function(grammar_url,cont) {
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this.current_grammar_url=grammar_url;
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if(cont) cont();
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},
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get_grammarlist: function(cont,err) {
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if(this.grammar_list) cont(this.grammar_list)
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else http_get_json(this.grammars_url+"grammars.cgi",cont,err);
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},
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get_grammarlists: function(cont,err) { // May call cont several times!
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function pair(dir) {
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return function(grammar_list){cont(dir,grammar_list)}
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}
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function ignore_error(err) { console.log(err) }
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this.get_grammarlist(pair(this.grammars_url),err)
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var ds=this.other_grammars_urls;
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for(var i in ds)
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http_get_json(ds[i]+"grammars.cgi",pair(ds[i]),ignore_error);
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},
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pgf_call: function(cmd,args,cont,err) {
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var url=this.current_grammar_url+"?command="+cmd+encodeArgs(args)
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http_get_json(url,cont,err);
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},
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get_languages: function(cont,err) {
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this.pgf_call("grammar",{},cont,err);
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},
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grammar_info: function(cont,err) {
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this.pgf_call("grammar",{},cont,err);
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},
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get_random: function(args,cont,err) { // cat, limit
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args.random=Math.random(); // side effect!!
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this.pgf_call("random",args,cont,err);
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},
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linearize: function(args,cont,err) { // tree, to
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this.pgf_call("linearize",args,cont,err);
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},
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complete: function(args,cont,err) { // from, input, cat, limit
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this.pgf_call("complete",args,cont,err);
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},
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parse: function(args,cont,err) { // from, input, cat
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this.pgf_call("parse",args,cont,err);
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},
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translate: function(args,cont,err) { // from, input, cat, to
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this.pgf_call("translate",args,cont,err);
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},
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translategroup: function(args,cont,err) { // from, input, cat, to
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this.pgf_call("translategroup",args,cont,err);
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},
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browse: function(id,cont,err) {
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this.pgf_call("browse",{id:id,format:"json"},cont,err);
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}
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};
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for(var o in options) server[o]=options[o];
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if(server.grammar_list && server.grammar_list.length>0)
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server.switch_grammar(server.grammar_list[0]);
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return server;
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}
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