tview/demos/inputfield/autocomplete/main.go

package main

import (
	"strings"

	"github.com/gdamore/tcell/v2"
	"github.com/rivo/tview"
)

// 1,000 most common English words.
const wordList = "ability,able,about,above,accept,according,account,across,act,action,activity,actually,add,address,administration,admit,adult,affect,after,again,against,age,agency,agent,ago,agree,agreement,ahead,air,all,allow,almost,alone,along,already,also,although,always,American,among,amount,analysis,and,animal,another,answer,any,anyone,anything,appear,apply,approach,area,argue,arm,around,arrive,art,article,artist,as,ask,assume,at,attack,attention,attorney,audience,author,authority,available,avoid,away,baby,back,bad,bag,ball,bank,bar,base,be,beat,beautiful,because,become,bed,before,begin,behavior,behind,believe,benefit,best,better,between,beyond,big,bill,billion,bit,black,blood,blue,board,body,book,born,both,box,boy,break,bring,brother,budget,build,building,business,but,buy,by,call,camera,campaign,can,cancer,candidate,capital,car,card,care,career,carry,case,catch,cause,cell,center,central,century,certain,certainly,chair,challenge,chance,change,character,charge,check,child,choice,choose,church,citizen,city,civil,claim,class,clear,clearly,close,coach,cold,collection,college,color,come,commercial,common,community,company,compare,computer,concern,condition,conference,Congress,consider,consumer,contain,continue,control,cost,could,country,couple,course,court,cover,create,crime,cultural,culture,cup,current,customer,cut,dark,data,daughter,day,dead,deal,death,debate,decade,decide,decision,deep,defense,degree,Democrat,democratic,describe,design,despite,detail,determine,develop,development,die,difference,different,difficult,dinner,direction,director,discover,discuss,discussion,disease,do,doctor,dog,door,down,draw,dream,drive,drop,drug,during,each,early,east,easy,eat,economic,economy,edge,education,effect,effort,eight,either,election,else,employee,end,energy,enjoy,enough,enter,entire,environment,environmental,especially,establish,even,evening,event,ever,every,everybody,everyone,everything,evidence,exactly,example,executive,exist,expect,experience,expert,explain,eye,face,fact,factor,fail,fall,family,far,fast,father,fear,federal,feel,feeling,few,field,fight,figure,fill,film,final,finally,financial,find,fine,finger,finish,fire,firm,first,fish,five,floor,fly,focus,follow,food,foot,for,force,foreign,forget,form,former,forward,four,free,friend,from,front,full,fund,future,game,garden,gas,general,generation,get,girl,give,glass,go,goal,good,government,great,green,ground,group,grow,growth,guess,gun,guy,hair,half,hand,hang,happen,happy,hard,have,he,head,health,hear,heart,heat,heavy,help,her,here,herself,high,him,himself,his,history,hit,hold,home,hope,hospital,hot,hotel,hour,house,how,however,huge,human,hundred,husband,idea,identify,if,image,imagine,impact,important,improve,in,include,including,increase,indeed,indicate,individual,industry,information,inside,instead,institution,interest,interesting,international,interview,into,investment,involve,issue,it,item,its,itself,job,join,just,keep,key,kid,kill,kind,kitchen,know,knowledge,land,language,large,last,late,later,laugh,law,lawyer,lay,lead,leader,learn,least,leave,left,leg,legal,less,let,letter,level,lie,life,light,like,likely,line,list,listen,little,live,local,long,look,lose,loss,lot,love,low,machine,magazine,main,maintain,major,majority,make,man,manage,management,manager,many,market,marriage,material,matter,may,maybe,me,mean,measure,media,medical,meet,meeting,member,memory,mention,message,method,middle,might,military,million,mind,minute,miss,mission,model,modern,moment,money,month,more,morning,most,mother,mouth,move,movement,movie,Mr,Mrs,much,music,must,my,myself,n't,name,nation,national,natural,nature,near,nearly,necessary,need,network,never,new,news,newspaper,next,nice,night,no,none,nor,north,not,note,nothing,notice,now,number,occur,of,off,offer,office,officer,official,often,oh,oil,ok,old,on,once,one,only,onto,open,operation,opportunity,option,or,order,organization,other,others,our,out,outside,over,own,owner,page,pain,painting,paper,parent,part,participant,particular,particularly,partner,party,pass,past,patient,pattern,pay,peace,people,per,perform,performance,perhaps,period,person,personal,phone,physical,pick,picture,piece,place,plan,plant,play,player,PM,point,police,policy,political,politics,poor,popular,population,position,positive,possible,power,practice,prepare,present,president,pressure,pretty,prevent,price,private,probably,problem,process,produce,product,production,professional,professor,program,project,property,protect,prove,provide,public,pull,purpose,push,put,quality,question,quickly,quite,race,radio,raise,range,rate,rather,reach,read,ready,real,reality,realize,really,reason,receive,recent,recently,recognize,record,red,reduce,reflect,region,relate,relationship,religious,remain,remember,remove,report,represent,Republican,require,research,resource,respond,response,responsibility,rest,result,return,reveal,rich,right,rise,risk,road,rock,role,room,rule,run,safe,same,save,say,scene,school,science,scientist,score,sea,season,seat,second,section,security,see,seek,seem,sell,send,senior,sense,series,serious,serve,service,set,seven,several,sex,sexual,shake,share,she,shoot,short,shot,should,shoulder,show,side,sign,significant,similar,simple,simply,since,sing,single,sister,sit,site,situation,six,size,skill,skin,small,smile,so,social,society,soldier,some,somebody,someone,something,sometimes,son,song,soon,sort,sound,source,south,southern,space,speak,special,specific,speech,spend,sport,spring,staff,stage,stand,standard,star,start,state,statement,station,stay,step,still,stock,stop,store,story,strategy,street,strong,structure,student,study,stuff,style,subject,success,successful,such,suddenly,suffer,suggest,summer,support,sure,surface,system,table,take,talk,task,tax,teach,teacher,team,technology,television,tell,ten,tend,term,test,than,thank,that,the,their,them,themselves,then,theory,there,these,they,thing,think,third,this,those,though,thought,thousand,threat,three,through,throughout,throw,thus,time,to,today,together,tonight,too,top,total,tough,toward,town,trade,traditional,training,travel,treat,treatment,tree,trial,trip,trouble,true,truth,try,turn,TV,two,type,under,understand,unit,until,up,upon,us,use,usually,value,various,very,victim,view,violence,visit,voice,vote,wait,walk,wall,want,war,watch,water,way,we,weapon,wear,week,weight,well,west,western,what,whatever,when,where,whether,which,while,white,who,whole,whom,whose,why,wide,wife,will,win,wind,window,wish,with,within,without,woman,wonder,word,work,worker,world,worry,would,write,writer,wrong,yard,yeah,year,yes,yet,you,young,your,yourself"

func main() {
	words := strings.Split(wordList, ",")
	app := tview.NewApplication()
	inputField := tview.NewInputField().
		SetLabel("Enter a word: ").
		SetFieldWidth(30).
		SetDoneFunc(func(key tcell.Key) {
			app.Stop()
		})
	inputField.SetAutocompleteFunc(func(currentText string) (entries []string) {
		if len(currentText) == 0 {
			return
		}
		for _, word := range words {
			if strings.HasPrefix(strings.ToLower(word), strings.ToLower(currentText)) {
				entries = append(entries, word)
			}
		}
		if len(entries) <= 1 {
			entries = nil
		}
		return
	})
	inputField.SetAutocompletedFunc(func(text string, index, source int) bool {
		if source != tview.AutocompletedNavigate {
			inputField.SetText(text)
		}
		return source == tview.AutocompletedEnter || source == tview.AutocompletedClick
	})
	if err := app.EnableMouse(true).SetRoot(inputField, true).Run(); err != nil {
		panic(err)
	}
}