Subversion Repositories Kolibri OS

#include 

#include 

#include 

#include FT_FREETYPE_H

#include FT_GLYPH_H

#include "winlib.h"

int init_fontlib();

font_t *create_font(FT_Face face, int size);

int get_font_height(font_t *font);

int get_font_width(font_t *font);

int draw_text_ext(ctx_t *ctx, font_t *font, char *text, int len, rect_t *rc, color_t color);

typedef struct

{

    ctx_t    *ctx;

    font_t   *font;

    char    *text;

    char   **line;

    int      lines;

    int      startline;

    int      endline;

    int      pagesize;

    int      tail;

    rect_t   margins;

    int      leading;

    int      line_height;

    int      w;

    int      h;

}tview_t;

tview_t *create_tview(ctx_t *ctx, int width, int height)

{

    tview_t *txv;

    txv = malloc(sizeof(*txv));

    if(txv == NULL)

    {

        return NULL;

    };

    memset(txv, 0, sizeof(*txv));

    txv->ctx = ctx;

    txv->w = width;

    txv->h = height;

    txv->font = create_font(NULL, 18);

    txv->leading = 4;

    txv->line_height = txv->leading + get_font_height(txv->font);

    return txv;

};

void txv_get_margins(const tview_t *txv, rect_t *margins)

{

    *margins = txv->margins;

};

void txv_set_margins(tview_t *txv, const rect_t *margins)

{

    txv->margins = *margins;

};

static void txv_recalc(tview_t *txv)

{

    int full_height;

    int endline;

    full_height = txv->h - (txv->margins.t + txv->margins.b);

    txv->pagesize = full_height / txv->line_height;

    txv->tail = full_height % txv->line_height;

    endline = txv->startline + txv->pagesize;

    txv->endline = endline  < txv->lines ? endline : txv->lines;

//    printf("pagesize %d visible %d endline %d\n",txv->pagesize, txv->pagesize+!!txv->tail, txv->endline );

};

static void txv_redraw(tview_t *txv)

{

    rect_t rc;

    int i;

    rc.l = 0;

    rc.t = 0;

    rc.r = txv->w;

    rc.b = txv->h;

    px_fill_rect(txv->ctx, &rc, 0xFFFFFFFF);

    rc.l = txv->margins.l;

    rc.t = txv->margins.t;

    rc.r = txv->w - txv->margins.r;

    rc.b = rc.t + txv->line_height;

    for(i = txv->startline; i < txv->endline; i++)

    {

        draw_text_ext(txv->ctx, txv->font, txv->line[i], txv->line[i+1]-txv->line[i], &rc, 0xFF000000);

        rc.t+= txv->line_height;

        rc.b+= txv->line_height;

    }

    if(txv->tail && ( i < txv->lines))

        draw_text_ext(txv->ctx, txv->font, txv->line[i], txv->line[i+1]-txv->line[i], &rc, 0xFF000000);

};

void txv_set_text(tview_t *txv, char *text, int size)

{

    int  i = 0;

    char *p, *t;

    p = text;

    while(i < size)

    {

        switch(*p++)

        {

            case '\n':

                txv->lines++;

                break;

            case '\r':

                break;

        }

        i++;

    };

    txv->line = user_alloc((txv->lines+1)*sizeof(char*));

    txv->text = text;

    {

        int  l=0;

        i = 0;

        txv->line[0] = txv->text;

        while(i < size)

        {

            switch(*text++)

            {

                case '\n':

                    l++;

                    txv->line[l] = text;

                    break;

                case '\r':

                    txv->line[l] = text;

                    break;

            }

            i++;

        };

    }

    txv_recalc(txv);

    txv_redraw(txv);

};

int txv_scroll_down(tview_t *txv)

{

    int dst, src, rows;

    rect_t rc;

    if(txv->endline < txv->lines)

    {

        dst  = txv->margins.t;

        src  = dst + txv->line_height;

        rows = txv->line_height * (txv->pagesize-1);

        scroll_context(txv->ctx, dst, src, rows );

        rc.l = txv->margins.l;

        rc.t = txv->margins.t + rows;

        rc.r = txv->w - txv->margins.r;

        rc.b = rc.t + txv->line_height;

        px_fill_rect(txv->ctx, &rc, 0xFFFFFFFF);

        draw_text_ext(txv->ctx, txv->font, txv->line[txv->endline],

                      txv->line[txv->endline+1]-txv->line[txv->endline], &rc, 0xFF000000);

        txv->startline++;

        txv->endline++;

        if( txv->tail && (txv->endline < txv->lines))

        {

            rc.t+= txv->line_height;

            rc.b+= txv->line_height;

            px_fill_rect(txv->ctx, &rc, 0xFFFFFFFF);

            draw_text_ext(txv->ctx, txv->font, txv->line[txv->endline],

                          txv->line[txv->endline+1]-txv->line[txv->endline], &rc, 0xFF000000);

        }

        return 1;

    };

    return 0;

};

int txv_scroll_up(tview_t *txv)

{

    int dst, src, rows;

    rect_t rc;

    if(txv->startline > 0)

    {

        rows = txv->tail + txv->line_height * (txv->pagesize-1);

        src  = txv->margins.t;

        dst  = src + txv->line_height;

        scroll_context(txv->ctx, dst, src, rows);

        rc.l = txv->margins.l;

        rc.t = txv->margins.t;

        rc.r = txv->w - txv->margins.r;

        rc.b = rc.t + txv->line_height;

        px_fill_rect(txv->ctx, &rc, 0xFFFFFFFF);

        txv->startline--;

        txv->endline--;

        draw_text_ext(txv->ctx, txv->font, txv->line[txv->startline],

                      txv->line[txv->startline+1]-txv->line[txv->startline], &rc, 0xFF000000);

        return 1;

    };

    return 0;

};

int txv_page_up(tview_t *txv)

{

    int startline, endline;

    startline = txv->startline - txv->pagesize;

    txv->startline = startline >= 0 ? startline : 0;

    endline = txv->startline + txv->pagesize;

    txv->endline = endline  < txv->lines ? endline : txv->lines;

    txv_redraw(txv);

    return 1;

};

int txv_page_down(tview_t *txv)

{

    int startline, endline;

    endline = txv->endline + txv->pagesize;

    txv->endline = endline  < txv->lines ? endline : txv->lines;

    startline = txv->endline - txv->pagesize;

    txv->startline = startline >= 0 ? startline : 0;

    txv_redraw(txv);

    return 1;

};

void txv_set_size(tview_t *txv, int txw, int txh)

{

    txv->w = txw;

    txv->h = txh;

    txv_recalc(txv);

    txv_redraw(txv);

};

void txv_set_font_size(tview_t *txv, int size)

{

    if(size > 72)

        size = 72;

    else if(size < 6)

        size = 6;

    txv->font = create_font(NULL, size);

    if ( txv->font == NULL )

    {

        printf("cannot create font\n");

        return;

    }

    txv->line_height = txv->leading + get_font_height(txv->font);

    txv_recalc(txv);

    txv_redraw(txv);

}

int  txv_get_font_size(tview_t *txv)

{

    return get_font_height(txv->font);

}