override_prev_lines.c

#include <windows.h>
#include <stdio.h>

void normal(char* s) {
    HANDLE hOut = GetStdHandle(STD_OUTPUT_HANDLE);
    WORD info_style = FOREGROUND_GREEN | FOREGROUND_RED | FOREGROUND_BLUE;
    SetConsoleTextAttribute(hOut, info_style);
    printf(s);
}

void success(char* s) {
    HANDLE hOut = GetStdHandle(STD_OUTPUT_HANDLE);
    WORD info_style = FOREGROUND_GREEN | FOREGROUND_INTENSITY;
    SetConsoleTextAttribute(hOut, info_style);
    printf(s);
}

void success_bg(char* s) {
    HANDLE hOut = GetStdHandle(STD_OUTPUT_HANDLE);
    WORD info_style = BACKGROUND_GREEN | BACKGROUND_INTENSITY;
    SetConsoleTextAttribute(hOut, info_style);
    printf(s);
}

void error(char* s) {
    HANDLE hOut = GetStdHandle(STD_OUTPUT_HANDLE);
    WORD info_style = FOREGROUND_RED | FOREGROUND_INTENSITY;
    SetConsoleTextAttribute(hOut, info_style);
    printf(s);
}

void info(char* s) {
    HANDLE hOut = GetStdHandle(STD_OUTPUT_HANDLE);
    WORD info_style = FOREGROUND_BLUE | FOREGROUND_INTENSITY;
    SetConsoleTextAttribute(hOut, info_style);
    printf(s);
}

void highlight(char* s) {
    HANDLE hOut = GetStdHandle(STD_OUTPUT_HANDLE);
    WORD info_style = 0x0F;
    SetConsoleTextAttribute(hOut, info_style);
    printf(s);
}

void underline(char* s) {
    HANDLE hOut = GetStdHandle(STD_OUTPUT_HANDLE);
    WORD info_style = 0x0F | COMMON_LVB_UNDERSCORE;
    SetConsoleTextAttribute(hOut, info_style);
    printf(s);
}

void override_prev_lines(char* s, int n) {
    HANDLE hOut = GetStdHandle(STD_OUTPUT_HANDLE);
    CONSOLE_SCREEN_BUFFER_INFO csbInfo;
    GetConsoleScreenBufferInfo(hOut, &csbInfo);
    COORD cur_pos = csbInfo.dwCursorPosition;
    SHORT width = csbInfo.dwMaximumWindowSize.X;
    COORD prev_lines = {0, cur_pos.Y - n + 1};

    char saved_line[256] = {0};
    long unsigned int nSaved;
    ReadConsoleOutputCharacter( hOut, saved_line, cur_pos.X + (n - 1) * width, prev_lines, &nSaved);

    SetConsoleCursorPosition(hOut, prev_lines);
    for (int i = 0; i < width * n; i++)
        putchar(' ');

    SetConsoleCursorPosition(hOut, prev_lines);
    printf(s);
    printf(saved_line);
}

int main() {
    /* 消息样式化测试
    success("SUCCESS\n");
    error("ERROR\n");
    info("INFO\n");
    normal("NORMAL\n");
    highlight("HIGHLIGHT\n");
    underline("UNDERLINE\n");
    
    success_bg("SUCCESS BACKGROUND\n"); */

    printf("Input blah blah\n");
    printf("$ > ");
    Sleep(1000);

    // Insert a message
    override_prev_lines("A MESSAGE FROM EMINEM.\n", 2);

    getchar();
    return 0;
}