[TD-5533]<feature>:add 'ctrl+u' and 'ctrl+k' shortcut for taosshell

src/kit/shell/inc/shellCommand.h

@@ -35,6 +35,8 @@ struct Command {
 };
 
 extern void backspaceChar(Command *cmd);
+extern void clearLineBefore(Command *cmd);
+extern void clearLineAfter(Command *cmd);
 extern void deleteChar(Command *cmd);
 extern void moveCursorLeft(Command *cmd);
 extern void moveCursorRight(Command *cmd);

src/kit/shell/src/shellCommand.c

@@ -102,6 +102,28 @@ void backspaceChar(Command *cmd) {
   }
 }
 
+void clearLineBefore(Command *cmd) {
+  assert(cmd->cursorOffset <= cmd->commandSize && cmd->endOffset >= cmd->screenOffset);
+
+  clearScreen(cmd->endOffset + prompt_size, cmd->screenOffset + prompt_size);
+  memmove(cmd->command, cmd->command + cmd->cursorOffset,
+          cmd->commandSize - cmd->cursorOffset);
+  cmd->commandSize -= cmd->cursorOffset;
+  cmd->cursorOffset = 0;
+  cmd->screenOffset = 0;
+  cmd->endOffset = cmd->commandSize;
+  showOnScreen(cmd);
+}
+
+void clearLineAfter(Command *cmd) {
+  assert(cmd->cursorOffset <= cmd->commandSize && cmd->endOffset >= cmd->screenOffset);
+
+  clearScreen(cmd->endOffset + prompt_size, cmd->screenOffset + prompt_size);
+  cmd->commandSize -= cmd->endOffset - cmd->cursorOffset;
+  cmd->endOffset = cmd->cursorOffset;
+  showOnScreen(cmd);
+}
+
 void deleteChar(Command *cmd) {
   assert(cmd->cursorOffset <= cmd->commandSize && cmd->endOffset >= cmd->screenOffset);
 

src/kit/shell/src/shellDarwin.c

@@ -238,10 +238,16 @@ int32_t shellReadCommand(TAOS *con, char *command) {
             updateBuffer(&cmd);
           }
           break;
+        case 11:  // Ctrl + K;
+          clearLineAfter(&cmd);
+          break;
         case 12:  // Ctrl + L;
           system("clear");
           showOnScreen(&cmd);
           break;
+        case 21:  // Ctrl + U
+          clearLineBefore(&cmd);
+          break;
       }
     } else if (c == '\033') {
       c = getchar();

src/kit/shell/src/shellLinux.c

@@ -238,10 +238,16 @@ int32_t shellReadCommand(TAOS *con, char *command) {
             updateBuffer(&cmd);
           }
           break;
+        case 11:  // Ctrl + K;
+          clearLineAfter(&cmd);
+          break;
         case 12:  // Ctrl + L;
           system("clear");
           showOnScreen(&cmd);
           break;
+        case 21:  // Ctrl + U;
+          clearLineBefore(&cmd);
+          break;
       }
     } else if (c == '\033') {
       c = (char)getchar();