feat: 发布4×4候选与Android手表应用内键盘组件

com.sydxky.rtos.inputmethod/src/common/ime-engine.js

@@ -26,6 +26,23 @@ export function digitsOf(text) {
   return result
 }
 export function chars(text){return Array.from(String(text||''))}
+// Four columns and four row units. Phrases take more width/height, never ellipsis.
+export function candidatePages(candidates) {
+  const pages=[];let rows=[],usedRows=0,row=null
+  function flushRow(){if(row){rows.push(row);usedRows+=row.units;row=null}}
+  function flushPage(){flushRow();if(rows.length)pages.push(rows);rows=[];usedRows=0}
+  for(const item of candidates){
+    const length=chars(item.word).length
+    const span=length===1?1:length<=4?2:4
+    const units=span===4?Math.max(1,Math.ceil(length/12)):1
+    if(row&&(row.slots+span>4||row.units!==units))flushRow()
+    if(usedRows+units>4)flushPage()
+    if(!row)row={items:[],slots:0,units}
+    row.items.push({item,span});row.slots+=span
+    if(row.slots===4)flushRow()
+  }
+  flushPage();return pages
+}
 export function edit(text,cursor,insertion,maxLength) {
   const value=chars(text), at=Math.max(0,Math.min(value.length,cursor))
   const room=Math.max(0,maxLength-value.length), added=chars(insertion).slice(0,room)