text.c

ARM9-2410教学实验系统下Linux下minigui程序

/*
** $Id: text.c,v 1.15 2003/09/04 06:02:53 weiym Exp $
**
** text.c: The Text Support of GDI.
**
** Copyright (C) 2003 Feynman Software.
** Copyright (C) 2000 ~ 2002 Wei Yongming.
**
** Current maintainer: Wei Yongming.
**
** Create date: 2000/4/19
*/

/*
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

/*
** TODO:
*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "common.h"
#include "minigui.h"
#include "gdi.h"
#include "window.h"
#include "cliprect.h"
#include "gal.h"
#include "internals.h"
#include "ctrlclass.h"
#include "dc.h"
#include "drawtext.h"
#include "cursor.h"

int GUIAPI GetFontHeight (HDC hdc)
{
    PDC pdc = dc_HDC2PDC(hdc);

    return pdc->pLogFont->size;
}

int GUIAPI GetMaxFontWidth (HDC hdc)
{
    PDC pdc = dc_HDC2PDC(hdc);
    DEVFONT* sbc_devfont = pdc->pLogFont->sbc_devfont;
    DEVFONT* mbc_devfont = pdc->pLogFont->mbc_devfont;
    int sbc_max_width = (*sbc_devfont->font_ops->get_max_width) (pdc->pLogFont, sbc_devfont);
    int mbc_max_width = 0;

    if (mbc_devfont)
        mbc_max_width = (*mbc_devfont->font_ops->get_max_width) (pdc->pLogFont, mbc_devfont);
    
    return (sbc_max_width > mbc_max_width) ? sbc_max_width : mbc_max_width;
}

void GUIAPI GetTextExtent (HDC hdc, const char* spText, int len, SIZE* pSize)
{
    PDC pdc;

    pdc = dc_HDC2PDC(hdc);
    if (len < 0) len = strlen (spText);

    gdi_get_TextOut_extent (pdc, pdc->pLogFont, spText, len, pSize);
}

void GUIAPI GetTabbedTextExtent (HDC hdc, const char* spText, int len, SIZE* pSize)
{
    PDC pdc;

    pdc = dc_HDC2PDC(hdc);
    if (len < 0) len = strlen (spText);

    gdi_get_TabbedTextOut_extent (pdc, pdc->pLogFont, pdc->tabstop, 
                spText, len, pSize, NULL);
}

void GUIAPI GetLastTextOutPos (HDC hdc, POINT* pt)
{
    PDC pdc;

    pdc = dc_HDC2PDC(hdc);
    *pt = pdc->CurTextPos;
}

int GUIAPI TextOutLen (HDC hdc, int x, int y, const char* spText, int len)
{
    PDC pdc;
    SIZE size;

    if (len == 0) return 0;
    if (len < 0) len = strlen (spText);

    pdc = dc_HDC2PDC(hdc);

    gdi_get_TextOut_extent (pdc, pdc->pLogFont, spText, len, &size);
    {
        /* update text out position. */
        int width = size.cx;

        extent_x_SP2LP (pdc, &width);
        pdc->CurTextPos.x = x + width;
        pdc->CurTextPos.y = y;
    }

    if (dc_IsGeneralDC (pdc)) {
        LOCK (&pdc->pGCRInfo->lock);
        if (!dc_GenerateECRgn (pdc, FALSE)) {
            UNLOCK (&pdc->pGCRInfo->lock);
            return size.cx;
        }
    }
#ifdef _LITE_VERSION
    if (CHECK_DRAWING (pdc)) return size.cx;
#endif

    /* Transfer logical to device to screen here. */
    coor_LP2SP(pdc, &x, &y);

    /* set rc_output to full device rect. */
    pdc->rc_output = pdc->DevRC;

    /* output text. */
    gdi_strnwrite (pdc, x, y, spText, len);

    /* we are done. */
    UNLOCK_GCRINFO (pdc);

    return size.cx;
}

int GUIAPI TabbedTextOutLen (HDC hdc, int x, int y, const char* spText, int len) 
{
    PDC pdc;
    SIZE size;

    if (len == 0) return 0;
    if (len < 0) len = strlen (spText);

    pdc = dc_HDC2PDC(hdc);

    coor_LP2SP (pdc, &pdc->CurTextPos.x, &pdc->CurTextPos.y);
    gdi_get_TabbedTextOut_extent (pdc, pdc->pLogFont, pdc->tabstop, spText, len, 
                &size, &pdc->CurTextPos);

    /* update text out position. */
    coor_SP2LP (pdc, &pdc->CurTextPos.x, &pdc->CurTextPos.y);

    if (dc_IsGeneralDC (pdc)) {
        LOCK (&pdc->pGCRInfo->lock);
        if (!dc_GenerateECRgn (pdc, FALSE)) {
            UNLOCK (&pdc->pGCRInfo->lock);
            return size.cx;
        }
    }
#ifdef _LITE_VERSION
    if (CHECK_DRAWING (pdc)) return size.cx;
#endif

    /* Transfer logical to device to screen here. */
    coor_LP2SP(pdc, &x, &y);

    /* set rc_output to full device rect. */
    pdc->rc_output = pdc->DevRC;

    /* output text */
    gdi_tabbedtextout (pdc, x, y, spText, len);

    /* done! */
    UNLOCK_GCRINFO (pdc);

    return size.cx;
}

char* strnchr (const char* s, size_t n, int c)
{
    size_t i;
    
    for (i=0; i<n; i++) {
        if ( *s == c)
            return (char *)s;

        s ++;
    }

    return NULL;
}

int substrlen (const char* text, int len, char delimiter, int* nr_delim)
{
    char* substr;

    *nr_delim = 0;

    if ( (substr = strnchr (text, len, delimiter)) == NULL)
        return len;

    len = substr - text;

    while (*substr == delimiter) {
        (*nr_delim) ++;
        substr ++;
    }

    return len;
}

int GUIAPI TabbedTextOutEx (HDC hdc, int x, int y, const char* spText,
		int nCount, int nTabs, int *pTabPos, int nTabOrig)
{
    PDC pdc;
    int line_len, sub_len;
    int nr_tab = 0, tab_pos, def_tab;
    int x_orig = x, max_x = x;
    int line_height;
    int nr_delim_newline, nr_delim_tab;

    if (nCount == 0) return 0;
    if (nCount < 0) nCount = strlen (spText);

    pdc = dc_HDC2PDC(hdc);

    line_height = pdc->pLogFont->size + pdc->alExtra + pdc->blExtra;
    y += pdc->alExtra;
    if (nTabs == 0 || pTabPos == NULL) {
        int ave_width = (*pdc->pLogFont->sbc_devfont->font_ops->get_ave_width)
                        (pdc->pLogFont, pdc->pLogFont->sbc_devfont);
        def_tab = ave_width * pdc->tabstop;
    }
    else
        def_tab = pTabPos [nTabs - 1];

    while (nCount) {
        line_len = substrlen (spText, nCount, '\n', &nr_delim_newline);

        nCount -= line_len + nr_delim_newline;

        nr_tab = 0;
        x = x_orig;
        tab_pos = nTabOrig;
        while (line_len) {
            int i, width;

            sub_len = substrlen (spText, line_len, '\t', &nr_delim_tab);

            width = TextOutLen (hdc, x, y, spText, sub_len);

            x += width; 
            if (x >= tab_pos) {
                while (x >= tab_pos)
                    tab_pos += (nr_tab >= nTabs) ? def_tab : pTabPos [nr_tab++];
                for (i = 0; i < nr_delim_tab - 1; i ++)
                    tab_pos += (nr_tab >= nTabs) ? def_tab : pTabPos [nr_tab++];
            }
            else {
                for (i = 0; i < nr_delim_tab; i ++)
                    tab_pos += (nr_tab >= nTabs) ? def_tab : pTabPos [nr_tab++];
            }

            x = tab_pos;

            line_len -= sub_len + nr_delim_tab;
            spText += sub_len + nr_delim_tab;
        }

        if (max_x < x) max_x = x;

        spText += nr_delim_newline;
        y += line_height * nr_delim_newline;
    }

    return max_x - x_orig;
}

static void txtDrawOneLine (PDC pdc, const char* pText, int nLen, int x, int y,
                    const RECT* prcOutput, UINT nFormat, int nTabWidth)
{
    /* set rc_output to the possible clipping rect */
    pdc->rc_output = *prcOutput;

    if (nFormat & DT_EXPANDTABS) {
        const char* sub = pText;
        const char* left;
        int nSubLen = nLen;
        int nOutputLen;
                
        while ((left = strnchr (sub, nSubLen, '\t'))) {
                    
            nOutputLen = left - sub;
            x += gdi_strnwrite (pdc, x, y, sub, nOutputLen);
                    
            nSubLen -= (nOutputLen + 1);
            sub = left + 1;
            x += nTabWidth;
        }

        if (nSubLen != 0)
            gdi_strnwrite (pdc, x, y, sub, nSubLen);
    }
    else
        gdi_strnwrite (pdc, x, y, pText, nLen);
}

static int txtGetWidthOfNextWord (PDC pdc, const char* pText, int nCount, int* nChars)
{
    int width;
    DEVFONT* sbc_devfont = pdc->pLogFont->sbc_devfont;
    DEVFONT* mbc_devfont = pdc->pLogFont->mbc_devfont;
    WORDINFO word_info; 

    *nChars = 0;
    if (nCount == 0) return 0;

    if (mbc_devfont) {
        int mbc_pos, sub_len;

        mbc_pos = (*mbc_devfont->charset_ops->pos_first_char) (pText, nCount);
        if (mbc_pos == 0) {
            sub_len = (*mbc_devfont->charset_ops->len_first_substr) (pText, nCount);

            (*mbc_devfont->charset_ops->get_next_word) (pText, sub_len, &word_info);
            width = (*mbc_devfont->font_ops->get_str_width) 
                        (pdc->pLogFont, mbc_devfont, pText, word_info.len, pdc->cExtra);

            *nChars = word_info.len;
            return width;
        }
        else if (mbc_pos > 0)
            nCount = mbc_pos;
    }

    (*sbc_devfont->charset_ops->get_next_word) (pText, nCount, &word_info);
    width = (*sbc_devfont->font_ops->get_str_width) 
                    (pdc->pLogFont, sbc_devfont, pText, word_info.len, pdc->cExtra);
    *nChars = word_info.len;

#if 0
    fprintf (stderr, "text: %s, width: %d, word len: %d\n", pText, width, word_info.len);
#endif

    return width;
}

// This function return the normal characters' number (refrence)
// and tab's number per line (return value).
static int txtGetOneLine (PDC pdc, const char* pText, int nCount, int nTabWidth, 
        int maxwidth, UINT uFormat, int* nChar)
{
    int x = 0, y = 0;
    int tabs = 0;
    int wordLen;
    int lineWidth = 0;
    int wordWidth;

    if (uFormat & DT_SINGLELINE) {
        *nChar = nCount;
        return 0;
    }

    *nChar = 0;
    while (TRUE) {
        wordWidth = txtGetWidthOfNextWord (pdc, pText, nCount, &wordLen);

        if ((wordWidth < maxwidth)
                && ((lineWidth + wordWidth) > maxwidth) 
                && (uFormat & DT_WORDBREAK))
            break;

        pText += wordLen;
        nCount -= wordLen;
        lineWidth += wordWidth;