w32g_playlist.c

MIDI解码程序(用VC编写)

	int maxlen, item2_len;
	int notitle = 0;

	filename = playlist.list[i].filename;
	title = playlist.list[i].title;
	if(title == NULL || title[0] == '\0')
	{
	    if(playlist.list[i].info->file_type == IS_ERROR_FILE)
		title = " --SKIP-- ";
		else
		{
//		title = " -------- ";
		title = playlist.list[i].filename;
		notitle = 1;
		}
	}
	maxlen = strlen(filename) + strlen(title) + 32 + 80;
	item1 = (char *)new_segment(&tmpbuffer, maxlen);
	if(!notitle)
	{
	if(i == playlist.selected)
	    snprintf(item1, maxlen, "==>%-80s   ==>(%s)", title, filename);
	else
	    snprintf(item1, maxlen, "   %-80s      (%s)", title, filename);
	} else
	{
	if(i == playlist.selected)
	    snprintf(item1, maxlen, "==>%-80s   ==>(%s)", title, filename);
	else
	    snprintf(item1, maxlen, "   %-80s      (%s)", title, filename);
	}
	item2_len = ListBox_GetTextLen(hListBox, i);
	item2 = (char *)new_segment(&tmpbuffer, item2_len + 1);
	ListBox_GetText(hListBox, i, item2);
	if(strcmp(item1, item2) != 0)
	{
	    ListBox_DeleteString(hListBox, i);
	    ListBox_InsertString(hListBox, i, item1);
	    modified = 1;
	}
	reuse_mblock(&tmpbuffer);
    }

    if(modified && cur==pos)
    {
	if(cur < 0)
	    cur = playlist.selected;
	else if(cur >= playlist.nfiles - 1)
	    cur = playlist.nfiles - 1;
	ListBox_SetCurSel(hListBox, cur);
	SetNumListWnd(cur,playlist.nfiles);
    }
}

void w32g_update_playlist(void)
{
#if 0
    int i, cur, modified;
    HWND hListBox;

    if(!(hListBox = playlist_box()))
	return;

    cur = ListBox_GetCurSel(hListBox);
    modified = 0;
    for(i = 0; i < playlist.nfiles; i++)
    {
	char *filename, *title, *item1, *item2;
	int maxlen, item2_len;

	filename = playlist.list[i].filename;
	title = playlist.list[i].title;
	if(title == NULL || title[0] == '\0')
	{
	    if(playlist.list[i].info->file_type == IS_ERROR_FILE)
		title = " --SKIP-- ";
	    else
		title = " -------- ";
	}
	maxlen = strlen(filename) + strlen(title) + 32;
	item1 = (char *)new_segment(&tmpbuffer, maxlen);
	if(i == playlist.selected)
	    snprintf(item1, maxlen, "==>%04d %s (%s)", i + 1, title, filename);
	else
	    snprintf(item1, maxlen, "   %04d %s (%s)", i + 1, title, filename);
	item2_len = ListBox_GetTextLen(hListBox, i);
	item2 = (char *)new_segment(&tmpbuffer, item2_len + 1);
	ListBox_GetText(hListBox, i, item2);
	if(strcmp(item1, item2) != 0)
	{
	    ListBox_DeleteString(hListBox, i);
	    ListBox_InsertString(hListBox, i, item1);
	    modified = 1;
	}
	reuse_mblock(&tmpbuffer);
    }

    if(modified)
    {
	if(cur < 0)
	    cur = playlist.selected;
	else if(cur >= playlist.nfiles - 1)
	    cur = playlist.nfiles - 1;
	ListBox_SetCurSel(hListBox, cur);
	SetNumListWnd(cur,playlist.nfiles);
    }
#else
    int i, cur, modified;
    HWND hListBox;

    if(!(hListBox = playlist_box()))
	return;

    cur = ListBox_GetCurSel(hListBox);
    modified = 0;
    for(i = 0; i < playlist.nfiles; i++)
    {
		w32g_update_playlist_pos(i);
    }

    if(modified)
    {
	if(cur < 0)
	    cur = playlist.selected;
	else if(cur >= playlist.nfiles - 1)
	    cur = playlist.nfiles - 1;
	ListBox_SetCurSel(hListBox, cur);
	SetNumListWnd(cur,playlist.nfiles);
    }
#endif
}

void w32g_get_playlist_index(int *selected, int *nfiles, int *cursel)
{
    if(selected != NULL)
	*selected = playlist.selected;
    if(nfiles != NULL)
	*nfiles = playlist.nfiles;
    if(cursel != NULL)
    {
	HWND hListBox;
	hListBox = playlist_box();
	if(hListBox)
	    *cursel = ListBox_GetCurSel(hListBox);
	else
	    *cursel = 0;
    }
}

int w32g_delete_playlist(int pos)
{
    int i;
    HWND hListBox;

    if(!(hListBox = playlist_box()))
	return 0;

    if(pos >= playlist.nfiles)
	return 0;

#ifdef W32G_RANDOM_IS_SHUFFLE
	w32g_shuffle_playlist_delete(pos);
#endif
    ListBox_DeleteString(hListBox, pos);
    free(playlist.list[pos].filename);
    playlist.nfiles--;
    for(i = pos; i < playlist.nfiles; i++)
		playlist.list[i] = playlist.list[i + 1];
    if(pos < playlist.selected || pos == playlist.nfiles)
    {
	playlist.selected--;
	if(playlist.selected < 0){
	    playlist.selected = 0;
		SetNumListWnd(playlist.selected,playlist.nfiles);
	} else
		w32g_update_playlist_pos(playlist.selected);
    }
    if(playlist.nfiles > 0)
    {
	if(pos == playlist.nfiles)
	    pos--;
	ListBox_SetCurSel(hListBox, pos);
	SetNumListWnd(pos,playlist.nfiles);
    }
    return 1;
}

int w32g_ismidi_playlist(int n)
{
    if(n < 0 || n >= playlist.nfiles)
	return 0;
    return playlist.list[n].info->format >= 0;
}

int w32g_nvalid_playlist(void)
{
    int i, n;

    n = 0;
    for(i = 0; i < playlist.nfiles; i++)
	if(w32g_ismidi_playlist(i))
	    n++;
    return n;
}

void w32g_setcur_playlist(void)
{
    HWND hListBox;
    if(!(hListBox = playlist_box()))
	return;
    ListBox_SetCurSel(hListBox, playlist.selected);
	SetNumListWnd(playlist.selected,playlist.nfiles);
}

int w32g_uniq_playlist(int *is_selected_removed)
{
    int nremoved;
    int i, n, j1, j2, cursel;
    HWND hListBox;

    hListBox = playlist_box();
    if(hListBox)
	cursel = ListBox_GetCurSel(hListBox);
    else
	cursel = -1;

    if(is_selected_removed != NULL)
	*is_selected_removed = 0;
    nremoved = 0;
    n = playlist.nfiles;
    for(i = 0; i < n - 1; i++)
    {
	int save_n;

	/* remove list[i] from list[i+1 .. n-1] */
	j1 = j2 = i + 1;
	save_n = n;
	while(j2 < save_n) /* j1 <= j2 */
	{
	    if(pathcmp(playlist.list[i].filename,
		       playlist.list[j2].filename, 0) == 0)
	    {
		nremoved++;
		n--;
		free(playlist.list[j2].filename);
		if(j2 == playlist.selected &&
		   is_selected_removed != NULL &&
		   !*is_selected_removed)
		{
		    *is_selected_removed = 1;
		    playlist.selected = j1;
		}
		if(j2 < playlist.selected)
		    playlist.selected--;
		if(j2 < cursel)
		    cursel--;
	    }
	    else
	    {
		playlist.list[j1] = playlist.list[j2];
		j1++;
	    }
	    j2++;
	}
    }
    if(nremoved)
    {
	for(i = 0; i < nremoved; i++)
	    ListBox_DeleteString(hListBox, --playlist.nfiles);
	if(cursel >= 0){
	    ListBox_SetCurSel(hListBox, cursel);
		SetNumListWnd(cursel,playlist.nfiles);
	}
	w32g_update_playlist();
    }
    return nremoved;
}

int w32g_refine_playlist(int *is_selected_removed)
{
    int nremoved;
    int i, j1, j2, cursel;
    HWND hListBox;

    hListBox = playlist_box();
    if(hListBox)
	cursel = ListBox_GetCurSel(hListBox);
    else
	cursel = -1;

    if(is_selected_removed != NULL)
	*is_selected_removed = 0;
    nremoved = 0;
    j1 = j2 = 0;
    while(j2 < playlist.nfiles) /* j1 <= j2 */
    {
	if(playlist.list[j2].info->format < 0)
	{
	    nremoved++;
	    free(playlist.list[j2].filename);
		if(j2 == playlist.selected &&
		   is_selected_removed != NULL &&
		   !*is_selected_removed)
		{
		    *is_selected_removed = 1;
		    playlist.selected = j1;
		}
		if(j2 < playlist.selected)
		    playlist.selected--;
		if(j2 < cursel)
		    cursel--;
	}
	else
	{
	    playlist.list[j1] = playlist.list[j2];
	    j1++;
	}
	j2++;
    }
    if(nremoved)
    {
	for(i = 0; i < nremoved; i++)
	    ListBox_DeleteString(hListBox, --playlist.nfiles);
	if(cursel >= playlist.nfiles)
	    cursel = playlist.nfiles - 1;
	if(cursel >= 0){
	    ListBox_SetCurSel(hListBox, cursel);
		SetNumListWnd(cursel,playlist.nfiles);
	}
	w32g_update_playlist();
    }
    return nremoved;
}

void w32g_clear_playlist(void)
{
    HWND hListBox;

    hListBox = playlist_box();
    while(playlist.nfiles > 0)
    {
	playlist.nfiles--;
	free(playlist.list[playlist.nfiles].filename);
#if 0
	if(hListBox)
	    ListBox_DeleteString(hListBox, playlist.nfiles);
#endif
    }
//	LB_RESETCONTENT
	if(hListBox)
	    ListBox_ResetContent(hListBox);
	playlist.selected = 0;
	SetNumListWnd(0,0);
}

void w32g_rotate_playlist(int dest)
{
    int i, i1, i2;
    HWND hListBox;
    PlayListEntry save;
	char temp[1024];

    if(playlist.nfiles == 0)
	return;
    if(!(hListBox = playlist_box()))
	return;

    i1 = ListBox_GetCurSel(hListBox);
    i2 = playlist.nfiles - 1;
    if(i1 >= i2)
	return;

#ifdef W32G_RANDOM_IS_SHUFFLE
	w32g_shuffle_playlist_rotate(dest,i1,i2);
#endif
    if(dest > 0)
    {
	save = playlist.list[i2];
	for(i = i2; i > i1; i--) /* i: i2 -> i1 */
	    playlist.list[i] = playlist.list[i - 1];
	playlist.list[i] = save;
	ListBox_GetText(hListBox,i2,temp);
    ListBox_DeleteString(hListBox,i2);
    ListBox_InsertString(hListBox,i1,temp);
	ListBox_SetCurSel(hListBox,i1);
	if(playlist.selected == i2){
	    playlist.selected = i1;
		w32g_update_playlist_pos(playlist.selected);
	} else if(i1 <= playlist.selected && playlist.selected < i2){
	    playlist.selected++;
		w32g_update_playlist_pos(playlist.selected);
	}
    }
    else
    {
	save = playlist.list[i1];
	for(i = i1; i < i2; i++) /* i: i1 -> i2 */
	    playlist.list[i] = playlist.list[i + 1];
	playlist.list[i] = save;
	ListBox_GetText(hListBox,i1,temp);
    ListBox_DeleteString(hListBox,i1);
    ListBox_InsertString(hListBox,-1,temp);
	ListBox_SetCurSel(hListBox,i1);
	if(playlist.selected == i1){
	    playlist.selected = i2;
		w32g_update_playlist_pos(playlist.selected);
	} else if(i1 < playlist.selected && playlist.selected <= i2){
	    playlist.selected--;    
		w32g_update_playlist_pos(playlist.selected);
	}
    }
}

char *w32g_get_playlist(int idx)
{
    if(idx < 0 || idx >= playlist.nfiles)
	return NULL;
    return playlist.list[idx].filename;
}