mirror of
https://github.com/GrammaticalFramework/gf-core.git
synced 2026-04-16 08:19:31 -06:00
277 lines
6.8 KiB
JavaScript
277 lines
6.8 KiB
JavaScript
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/* --- Input object --------------------------------------------------------- */
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function Input(server,translations,opts) { // Input object constructor
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this.server=server;
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this.translations=translations;
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// Default values for options:
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this.options={
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delete_button_text: "⌫",
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default_source_language: null,
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random_button: true,
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}
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// Apply supplied options
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if(opts) for(var o in opts) this.options[o]=opts[o];
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// User interface elements
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this.main=empty("div");
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this.menus=empty("span");
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this.buttons=empty("span");
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this.surface=div_id("surface");
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this.words=div_id("words");
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this.from_menu=empty("select");
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with(this) {
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appendChildren(main,[surface,words]);
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appendChildren(menus,[text(" From: "),from_menu])
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appendChildren(buttons,
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[button(options.delete_button_text,bind(delete_last,this),"H"),
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button("Clear",bind(clear_all,this),"L")]);
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if(options.random_button)
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buttons.appendChild(button("Random",bind(generate_random,this),"R"));
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}
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/* --- Input client state initialization --- */
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this.current={from: null, input: ""};
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this.previous=null;
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this.from_menu.onchange=bind(this.change_language,this);
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}
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Input.prototype.change_grammar=function (grammar) {
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update_language_menu(this.from_menu,grammar);
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set_initial_language(this.options,this.from_menu,grammar);
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this.change_language();
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}
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Input.prototype.change_language=function () {
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this.current.from=this.from_menu.value;
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this.clear_all();
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}
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Input.prototype.clear_all1=function() {
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with(this) {
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remove_typed_input();
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current.input="";
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previous=null;
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surface.innerHTML="";
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translations.clear();
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}
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}
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Input.prototype.clear_all=function() {
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with(this) {
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clear_all1();
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get_completions();
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}
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}
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Input.prototype.get_completions=function() {
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with(this) {
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//debug("get_completions ");
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words.innerHTML="...";
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server.complete({from:current.from,input:current.input},
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bind(show_completions,this));
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}
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}
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Input.prototype.show_completions=function(complete_output) {
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with(this) {
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//debug("show_completions ");
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var completions=complete_output[0].completions;
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var emptycnt=add_completions(completions)
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if(true/*emptycnt>0*/) translations.translateFrom(current);
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else translations.clear();
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if(surface.typed && emptycnt==completions.length) {
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if(surface.typed.value=="") remove_typed_input();
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}
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else add_typed_input();
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}
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}
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Input.prototype.add_completions=function(completions) {
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with(this) {
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if(words.timeout) clearTimeout(words.timeout),words.timeout=null;
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words.innerHTML="";
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words.completions=completions;
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words.word=[];
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var t=surface.typed ? surface.typed.value : "";
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var emptycnt=0;
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for(var i=0;i<completions.length;i++) {
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var s=completions[i];
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if(s.length>0) {
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var w=word(s);
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words.appendChild(w);
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words.word[i]=w;
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}
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else emptycnt++;
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}
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filter_completions(t,true);
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return emptycnt;
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}
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}
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Input.prototype.filter_completions=function(t,dim) {
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with(this) {
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if(words.timeout) clearTimeout(words.timeout),words.timeout=null;
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words.filtered=t;
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//if(dim) debug('filter "'+t+'"');
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var w=words.word;
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words.count=0;
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var dimmed=0;
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var prefix=""; // longest common prefix, for completion
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for(var i=0;i<w.length;i++) {
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var s=words.completions[i];
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var keep=hasPrefix(s,t);
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if(keep) {
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if(words.count==0) prefix=s;
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else prefix=(commonPrefix(prefix,s));
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words.count++;
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}
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if(dim) {
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w[i].style.opacity= keep ? "1" : "0.5";
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if(keep) w[i].style.display="inline";
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else dimmed++;
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}
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else
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w[i].style.display=keep ? "inline" : "none";
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}
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words.theword=prefix;
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if(dimmed>0)
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words.timeout=setTimeout(function(){ filter_completions(t,false)},1000);
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}
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}
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Input.prototype.add_typed_input=function() {
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with(this) {
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if(!surface.typed) {
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var inp=empty("input","type","text");
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inp.value="";
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inp.setAttribute("accesskey","t");
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inp.style.width="10em";
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inp.onkeyup=bind(complete_typed,this);
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surface.appendChild(inp);
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surface.typed=inp;
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inp.focus();
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}
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}
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}
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Input.prototype.remove_typed_input=function() {
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with(this) {
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if(surface.typed) {
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surface.typed.parentNode.removeChild(surface.typed);
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surface.typed=null;
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}
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}
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}
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Input.prototype.complete_typed=function(event) {
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with(this) {
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//element("debug").innerHTML=show_props(event,"event");
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var inp=surface.typed;
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//debug('"'+inp.value+'"');
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var s=inp.value;
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var ws=s.split(" ");
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if(ws.length>1 || event.keyCode==13) {
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if(ws[0]!=words.filtered) filter_completions(ws[0],true);
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if(words.count==1) add_word(words.theword);
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else if(elem(ws[0],words.completions)) add_word(ws[0]);
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else if(words.theword.length>ws[0].length) inp.value=words.theword;
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}
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else if(s!=words.filtered) filter_completions(s,true)
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}
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}
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Input.prototype.generate_random=function() {
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var t=this;
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function show_random(random) {
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t.clear_all1();
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t.add_words(random[0].text);
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}
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function lin_random(abs) {
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t.server.linearize({tree:abs[0].tree,to:t.current.from},show_random);
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}
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t.server.get_random({},lin_random);
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}
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Input.prototype.add_words=function(s) {
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with(this) {
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var ws=s.split(" ");
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for(var i=0;i<ws.length;i++)
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add_word1(ws[i]+" ");
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get_completions();
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}
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}
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Input.prototype.word=function(s) {
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var t=this;
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function click_word() {
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if(t.surface.typed) t.surface.typed.value="";
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t.add_word(s);
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}
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return button(s,click_word);
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}
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Input.prototype.add_word=function(s) {
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with(this) {
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add_word1(s+" ");
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if(surface.typed) {
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var s2;
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if(hasPrefix(s2=surface.typed.value,s)) {
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s2=s2.substr(s.length);
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while(s2.length>0 && s2[0]==" ") s2=s2.substr(1);
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surface.typed.value=s2;
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}
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else surface.typed.value="";
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}
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get_completions();
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}
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}
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Input.prototype.add_word1=function(s) {
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with(this) {
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previous={ input: current.input, previous: previous };
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current.input+=s;
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var w=span_class("word",text(s));
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if(surface.typed) surface.insertBefore(w,surface.typed);
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else surface.appendChild(w);
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}
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}
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Input.prototype.delete_last=function() {
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with(this) {
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if(surface.typed && surface.typed.value!="")
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surface.typed.value="";
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else if(previous) {
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current.input=previous.input;
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previous=previous.previous;
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if(surface.typed) {
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surface.removeChild(surface.typed.previousSibling);
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surface.typed.focus();
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}
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else surface.removeChild(surface.lastChild);
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translations.clear();
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get_completions();
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}
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}
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}
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/* --- Auxiliary functions -------------------------------------------------- */
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function set_initial_language(options,menu,grammar) {
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if(grammar.userLanguage) menu.value=grammar.userLanguage;
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else if(options.default_source_language) {
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for(var i=0;i<menu.options.length;i++) {
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var o=menu.options[i].value;
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var l=langpart(o,grammar.name);
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if(l==options.default_source_language) menu.value=o;
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}
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}
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}
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