105 lines
4.8 KiB
JavaScript
105 lines
4.8 KiB
JavaScript
// Numeric keypad composition. The caller supplies field identity and selection.
|
||
const letters = {
|
||
'0': ' 0', '1': '.,?!@-_:;/1', '2': 'abcàâç2', '3': 'deféèêë3',
|
||
'4': 'ghiîï4', '5': 'jkl5', '6': 'mnoôö6', '7': 'pqrs7',
|
||
'8': 'tuvùûü8', '9': 'wxyz9', '*': '*+()[]#',
|
||
};
|
||
export class KeypadText {
|
||
mode = 'abc';
|
||
pending = null;
|
||
dictionary = new Map();
|
||
returnMode = 'abc';
|
||
setDictionary(lines) {
|
||
const words = [];
|
||
for (const line of lines.split(/\r?\n/)) {
|
||
const [word, frequency] = line.split('\t');
|
||
const key = t9KeySequence(word || '');
|
||
if (!key) continue;
|
||
words.push({word,key,frequency:Number(frequency) || 0});
|
||
}
|
||
words.sort((a,b)=>b.frequency-a.frequency || a.word.localeCompare(b.word));
|
||
const prefixes=new Map();
|
||
for (const entry of words) for(let length=1;length<=entry.key.length;length++) {
|
||
const prefix=entry.key.slice(0,length),list=prefixes.get(prefix) || [];
|
||
if(list.length<32) {list.push(entry);prefixes.set(prefix,list);}
|
||
}
|
||
this.dictionary=prefixes;
|
||
}
|
||
formatT9(word) { return this.returnMode==='ABC' ? word.toUpperCase() : word; }
|
||
get suggestion() { return this.pending?.t9 ? this.formatT9(this.pending.candidates[this.pending.index]?.word || '') : null; }
|
||
setT9(enabled, previousMode=this.mode) {
|
||
if (enabled) { this.returnMode=previousMode; this.mode='t9'; }
|
||
else this.mode=previousMode;
|
||
this.commit();
|
||
return {mode:this.mode};
|
||
}
|
||
toggleT9() {
|
||
return this.setT9(this.mode!=='t9',this.mode==='t9' ? this.returnMode : this.mode);
|
||
}
|
||
commit() { this.pending = null; }
|
||
press(key, {field, text, start, end, numeric = false, now = Date.now()}) {
|
||
if (numeric) { this.commit(); return /^[0-9*#+]$/.test(key) ? {text:key, replace:0} : null; }
|
||
if (key === '#') {
|
||
this.mode = this.mode==='t9' ? this.returnMode : {abc:'ABC', ABC:'123', '123':'abc'}[this.mode];
|
||
this.commit(); return {mode:this.mode};
|
||
}
|
||
if (this.mode === 't9') return this.pressT9(key,{field,text,start,end,now});
|
||
if (!letters[key]) { this.commit(); return null; }
|
||
if (this.mode === '123' && key !== '*') { this.commit(); return {text:key,replace:0}; }
|
||
const choices = this.mode === 'ABC' ? letters[key].toUpperCase() : letters[key];
|
||
const p = this.pending;
|
||
const cycle = p && p.field === field && p.key === key && now - p.time < 900 &&
|
||
start === end && start === p.end && text.slice(start - p.text.length, start) === p.text;
|
||
const index = cycle ? (p.index + 1) % choices.length : 0;
|
||
const value = choices[index];
|
||
this.pending = {field, key, index, text:value, time:now,
|
||
end:(cycle ? start - p.text.length : start) + value.length};
|
||
return {text:value, replace:cycle ? p.text.length : 0};
|
||
}
|
||
pressT9(key,{field,text,start,end,now}) {
|
||
const p=this.pending;
|
||
const continuing=p?.t9 && p.field===field && start===end && start===p.end &&
|
||
text.slice(p.start,start)===p.text;
|
||
if (key==='*' && continuing && p.candidates.length>1) {
|
||
p.index=(p.index+1)%p.candidates.length;
|
||
const value=this.formatT9(p.candidates[p.index].word);
|
||
const replace=p.text.length;
|
||
p.text=value;p.end=p.start+value.length;p.time=now;
|
||
return {text:value,replace};
|
||
}
|
||
if (key==='0') { this.commit(); return {text:' ',replace:0}; }
|
||
if (key==='1') { this.commit(); return {text:'.',replace:0}; }
|
||
if (!/^[2-9]$/.test(key)) { this.commit(); return null; }
|
||
const sequence=continuing ? p.sequence+key : key;
|
||
const candidates=this.dictionary.get(sequence) || [];
|
||
if (!candidates.length) {
|
||
this.commit();
|
||
return {text:letters[key][0],replace:0};
|
||
}
|
||
const base=continuing ? p.start : start;
|
||
const value=this.formatT9(candidates[0].word);
|
||
const replace=continuing ? p.text.length : 0;
|
||
this.pending={t9:true,field,sequence,candidates,index:0,text:value,
|
||
start:base,end:base+value.length,time:now};
|
||
return {text:value,replace};
|
||
}
|
||
}
|
||
|
||
const latinKeys=['abc','def','ghi','jkl','mno','pqrs','tuv','wxyz'];
|
||
const cyrillicKeys=['абвг','дежзё','ийкл','мноп','рсту','фхцч','шщъы','ьэюя'];
|
||
const greekKeys=['αβγ','δεζ','ηθι','κλμ','νξο','πρσ','τυφ','χψω'];
|
||
export function t9KeySequence(word) {
|
||
let result='';
|
||
const normalized=String(word).toLocaleLowerCase()
|
||
.replace(/[æǽ]/g,'ae').replace(/œ/g,'oe').replace(/ł/g,'l')
|
||
.replace(/đ/g,'d').replace(/ð/g,'d').replace(/þ/g,'t')
|
||
.replace(/ß/g,'ss').replace(/ς/g,'σ');
|
||
for (const original of normalized) {
|
||
const char=original.normalize('NFD').replace(/[\u0300-\u036f]/g,'').replace('ı','i');
|
||
const groups=/[a-z]/.test(char) ? latinKeys : /[\u0400-\u04ff]/.test(char) ? cyrillicKeys : greekKeys;
|
||
const group=groups.findIndex(letters=>letters.includes(char));
|
||
if (group<0) return '';
|
||
result+=String(group+2);
|
||
}
|
||
return result;
|
||
}
|