//創建郵箱mbox_key_lcd計劃在鍵盤操作中實現

#include "lcd_debug.h"

//將LCD的顯示設置為輸入短消息的畫面
void enter_message_display()
{
	LCD_clr();													//清屏，光標歸零復位
	LCD_puts("TO:");											

}

//下面五個函數用于五種字符類型地輸入
//在各個函數中，所輸入地字符追加在message_info->message的后面
unsigned char input_number(SHORT_MESSAGE message_info)
{
	void *msg;													//接收key任務（中斷）發送的void*數據
	int receive;												//由msg轉化得來
	unsigned char i;
	INT8U err;
	
	while(1)
	{
		msg =OSMboxPend(mbox_key_lcd, 0, &err);
		receive =*(char *)msg;
		uart_put_char(receive % 128);									//for debug
		if(receive == MENU)										//是否發送短消息,MENU鍵臨時用作發送鍵
			return SEND_MESSAGE;
		if(receive == '#')										//是否切換輸入字符類型
			return SWITCH_INPUT_TYPE;
		
		if((receive == OUT_MENU) && (length > 0))				//刪除已輸入的字符,OUT_MENU也有退格鍵的功能
		{
			for(i=cursor; i<length-1; i++)
				message_info->message[i] =message_info->message[i+1];
			message_info->length--;
			message_info->cursor--;
			display_after_del();
		}
		if((receive == KEY_LEFT) && (message_info->cursor > 0))
		{
			(message_info->cursor)--;
			dispaly_after_lr();
		}
		if((receive == KEY_RIGHT) && (message_info->cusor < message_info->length))
		{
			(message_info->cursor)++;
			display_after_lr();
		}
		if((receive >= '0') && (receive <= '9'))
		{
			for(i=length; i>=cursor; i--)
				message_info->message[i+1] =message_info->message[i];
			message_info->message[cursor] =receive - '0';
			(message_info->length)++;
			(message_info->cursor)++;
			display_after_wr();
		}
																//下面代表短消息長度已經達到最大值
																//輸入左右鍵并不返回的含義：可能發送者要從短信中間刪除一些字符。
																//當然直接按刪除鍵也可以，此時就不能滿足length最大的條件了，所以不予考慮。
																//若不按左右鍵，只能按發送鍵才能解決問題。
		if((length >= MAX_MESSAGE_LENGTH) && ((receive != KEY_LEFT) || (receive != KEY_RIGHT)))
		return OUT_OF_RANGE;									
	}
}


//輸入法的主函數，處理所有的輸入
int * input_method_fun()
{
	SHORT_MESSAGE message_info;
	unsigned char type_select =1;								//用于控制輸入什么類型的字符
	unsigned char ret;											//接收返回值，用于判斷是否切換輸入類型、退出輸入
	unsigned char length;										//保存短消息的長度

	memset(message_info->message, 0, MAX_MESSAGE_LENGTH);
	message_info->length =0;
	message_info->cursor =0;

	while(1)
	{
		type_select =type_select % 5;
		switch(type_select)										//依次：漢語、數字、大寫字母、小寫字母、標點
		{
			case 0:
					display_which(0);							//顯示現在輸入漢語
					ret =input_chinese(message_info);			//切換至輸入漢語的函數
					break;
			case 1:
					display_which(1);
					ret =input_number(message_info);
					break;
			case 2:
					display_which(2);
					ret =input_lowercase(message_info);
					break;
			case 3:
					display_which(3);
					ret =input_uppercase(message_info);
					break;
			case 4:
					display_which(4);
					ret =input_punctuation(message_info);
					break;
			default:
					display_which(0);
					ret =input_chinese(message_info);
					return;
		}
		if(ret == SWITCH_INPUT_TYPE)							//切換輸入類型
			type_select++;
		if(ret == OUT_OF_RANGE)
			continue;
		if(ret == EXIT_INPUT)									//退出書寫，表示按發送鍵
			break;
	}

	return message;
}

//對輸入的信息進行處理
void deal_with_message(int * message)
{
	uart_put_str("shou dao");
}