common.c

一个用Ｃ语言写的ｓｏｒｃｋｅｔ相关的ｂｒｅｗ应用程序．

/**
***     Common.c
***
***     夋柺昤夋梡
***     Copyright (C) 2006 SophiaCradle Incorporated.
***     All rights reserved.
**/

#include "Common.h"

void COMMON_Init(Common* common, IDisplay* display, IShell* shell, int buffer_size)
{
    AEEDeviceInfo devinfo;

    common->display = display;
    common->size = buffer_size;
    common->start_line = 0;
    common->lines = 0;
    common->message = (AECHAR*)MALLOC(buffer_size * sizeof(AECHAR));
    common->message[0] = 0;
    common->message[buffer_size - 1] = 0;

    // 夋柺僒僀僘傪庢摼
    ISHELL_GetDeviceInfo(shell, &devinfo);
    common->width = devinfo.cxScreen;
    common->height = devinfo.cyScreen;

    // 僼僅儞僩忣曬傪庢摼
    common->font_height = IDISPLAY_GetFontMetrics(common->display, AEE_FONT_NORMAL, NULL, NULL);
    return;
}

void COMMON_Free(Common* common)
{
    FREE(common->message);
    return;
}

void COMMON_Draw(Common* common)
{
    IDisplay* d = common->display;
    int i = 0;
    int j = 0;
    int len = WSTRLEN(common->message);

    IDISPLAY_ClearScreen(d);
    common->lines = 0;
    while ((i < len - 1) && ((common->lines - common->start_line) * common->font_height < common->height)) {
        AECHAR t;
        int l;

        IDISPLAY_MeasureTextEx(d, AEE_FONT_NORMAL, common->message + i, len - i, common->width, &j);
        for (l = 0; l < j; l++) {
            if (common->message[i + l] == 0x0D || common->message[i + l] == '\n') {
                j = l;
                break;
            }
        }
        t = common->message[i + j];
        common->message[i + j] = 0;
        if (common->start_line <= common->lines) {
            IDISPLAY_DrawText(d, AEE_FONT_NORMAL, common->message + i, -1, 0, (common->lines - common->start_line) * common->font_height, NULL, IDF_ALIGN_LEFT);
        }
        common->message[i + j] = t;
        i += j;
        if (t == 0x0D) {
            i += 2;
        }
        if (t == '\n') {
            i++;
        }
        common->lines++;
    }
    IDISPLAY_Update(d);
    return;
}

void COMMON_ClearBuffer(Common* common)
{
    common->message[0] = 0;
    return;
}

void COMMON_WriteString(Common* common, const char* str)
{
    int size = (STRLEN(str) + 1) * sizeof(AECHAR);
    AECHAR* wstr = (AECHAR*)MALLOC(size);

    STRTOWSTR(str, wstr, size);
    WSTRLCAT(common->message, wstr, common->size * sizeof(AECHAR));
    FREE(wstr);
    return;
}

void COMMON_WriteWideString(Common* common, const AECHAR* wstr)
{
    WSTRLCAT(common->message, wstr, common->size * sizeof(AECHAR));
    return;
}

void COMMON_NextLine(Common* common)
{
    common->start_line++;
    if (common->start_line > common->lines - (common->height / common->font_height)) {
        common->start_line--;
    }
    return;
}

void COMMON_PreviousLine(Common* common)
{
    common->start_line--;
    if (common->start_line < 0) {
        common->start_line = 0;
    }
    return;
}