apply librime's new change_page api to turn candidate page

src/components/MyPanel.vue

@@ -7,7 +7,8 @@ import getCaretCoordinates from 'textarea-caret'
 import emojiRegex from 'emoji-regex'
 import {
   process,
-  selectCandidateOnCurrentPage
+  selectCandidateOnCurrentPage,
+  changePage
 } from '../workerAPI'
 import {
   text,
@@ -188,6 +189,10 @@ async function input (rimeKey: string) {
   return analyze(result, rimeKey)
 }
 
+async function onPageChange (backward: boolean) {
+  await changePage(backward)
+}
+
 // begin: code specific to Android Chromium
 let androidChromium = false
 let acStart = 0
@@ -414,7 +419,7 @@ defineExpose({
     >
       <n-icon
         :component="CaretLeft"
-        @click="input('-')"
+        @click="onPageChange(false)"
       />
     </n-button>
     <n-button
@@ -423,7 +428,7 @@ defineExpose({
     >
       <n-icon
         :component="CaretRight"
-        @click="input('=')"
+        @click="onPageChange(true)"
       />
     </n-button>
   </n-popover>

src/worker.ts

@@ -172,5 +172,8 @@ expose({
   },
   selectCandidateOnCurrentPage (index: number): string {
     return Module.ccall('select_candidate_on_current_page', 'string', ['number'], [index])
+  },
+  changePage (backward: boolean): void {
+    return Module.ccall('change_page', 'null', ['boolean'], [backward])
   }
 }, readyPromise)

src/workerAPI.ts

@@ -8,6 +8,7 @@ const setPageSize: (size: number) => Promise<void> = worker.register('setPageSiz
 const deploy: () => Promise<void> = worker.register('deploy')
 const process: (input: string) => Promise<RIME_RESULT> = worker.register('process')
 const selectCandidateOnCurrentPage: (index: number) => Promise<string> = worker.register('selectCandidateOnCurrentPage')
+const changePage: (backward: boolean) => Promise<void> = worker.register('changePage')
 const resetUserDirectory: () => Promise<void> = worker.register('resetUserDirectory')
 const FS = asyncFS(worker)
 
@@ -20,5 +21,6 @@ export {
   deploy,
   process,
   selectCandidateOnCurrentPage,
+  changePage,
   setIME
 }

wasm/api.cpp

@@ -172,6 +172,10 @@ const char *select_candidate_on_current_page(int index) {
   return post_process();
 }
 
+void change_page(bool backward) {
+  rime_get_api()->change_page(session_id, backward);
+}
+
 void set_ime(const char *ime) {
   if (rime_started) {
     // Need to reset session when using F4 to select a schema