feat: rime_api add RimeApi::RimeReplaceInput

resolve rime#547

Author: imfuxiao

src/rime/context.cc

@@ -254,6 +254,12 @@ void Context::set_input(const string& value) {
   update_notifier_(this);
 }
 
+void Context::replace_input(size_t pos, size_t count, const string& value) {
+  input_.replace(pos, count, value);
+  caret_pos_ = input_.length();
+  update_notifier_(this);
+}
+
 void Context::set_option(const string& name, bool value) {
   options_[name] = value;
   option_update_notifier_(this, name);

src/rime/context.h

@@ -58,6 +58,7 @@ class Context {
 
   void set_input(const string& value);
   const string& input() const { return input_; }
+  void replace_input(size_t pos, size_t count, const string& value);
 
   void set_caret_pos(size_t caret_pos);
   size_t caret_pos() const { return caret_pos_; }

src/rime_api.cc

@@ -1083,6 +1083,18 @@ const char* RimeGetStateLabel(RimeSessionId session_id,
       .str;
 }
 
+RIME_API Bool RimeReplaceInput(RimeSessionId session_id, size_t pos, size_t count, const char *replace_char) {
+  an<Session> session(Service::instance().GetSession(session_id));
+  if (!session)
+    return False;
+  Context *ctx = session->context();
+  if (!ctx)
+    return False;
+  ctx->replace_input(pos, count, replace_char);
+  return True;
+}
+
+
 RIME_API RimeApi* rime_get_api() {
   static RimeApi s_api = {0};
   if (!s_api.data_size) {
@@ -1176,6 +1188,7 @@ RIME_API RimeApi* rime_get_api() {
     s_api.delete_candidate = &RimeDeleteCandidate;
     s_api.delete_candidate_on_current_page = &RimeDeleteCandidateOnCurrentPage;
     s_api.get_state_label_abbreviated = &RimeGetStateLabelAbbreviated;
+    s_api.replace_input = &RimeReplaceInput;
   }
   return &s_api;
 }

src/rime_api.h

@@ -272,6 +272,7 @@ RIME_API void RimeCleanupAllSessions(void);
 // Input
 
 RIME_API Bool RimeProcessKey(RimeSessionId session_id, int keycode, int mask);
+
 /*!
  * return True if there is unread commit text
  */
@@ -386,6 +387,7 @@ RIME_API Bool RimeConfigUpdateSignature(RimeConfig* config, const char* signer);
 RIME_API Bool RimeSimulateKeySequence(RimeSessionId session_id,
                                       const char* key_sequence);
 
+RIME_API Bool RimeReplaceInput(RimeSessionId session_id, size_t pos, size_t count, const char* replace_char);
 // Module
 
 /*!
@@ -643,6 +645,12 @@ typedef struct rime_api_t {
                                                  const char* option_name,
                                                  Bool state,
                                                  Bool abbreviated);
+  //! select a candidate from current page.
+  Bool (*select_candidate_on_current_page)(RimeSessionId session_id,
+                                             size_t index);
+
+  //! modify the current input
+  Bool (*replace_input)(RimeSessionId session_id, size_t pos, size_t count, const char* replace_char);
 } RimeApi;
 
 //! API entry