static void view_remove_line(TEXT_BUFFER_VIEW_REC *view, LINE_REC *line,
int linecount)
{
int realcount;
view_bookmarks_check(view, line);
if (view->buffer->cur_line == line) {
/* the last line is being removed */
LINE_REC *prevline;
prevline = view->buffer->first_line == line ? NULL :
textbuffer_line_last(view->buffer);
view->cache->last_linecount = prevline == NULL ? 0 :
view_get_linecount(view, prevline);
}
if (view->buffer->first_line == line) {
/* first line in the buffer - this is the most commonly
removed line.. */
if (view->bottom_startline == line) {
/* very small scrollback.. */
view->bottom_startline = view->bottom_startline->next;
view->bottom_subline = 0;
}
if (view->startline == line) {
/* removing the first line in screen */
int is_last = view->startline->next == NULL;
realcount = view_scroll(view, &view->startline,
&view->subline,
linecount, FALSE);
view->ypos -= realcount;
view->empty_linecount += linecount-realcount;
if (is_last == 1)
view->startline = NULL;
}
} else {
if (textbuffer_line_exists_after(view->bottom_startline,
line)) {
realcount = view_scroll(view, &view->bottom_startline,
&view->bottom_subline,
-linecount, FALSE);
view->empty_linecount += linecount-realcount;
}
if (textbuffer_line_exists_after(view->startline,
line)) {
view_remove_line_update_startline(view, line,
linecount);
}
}
view->bottom = view_is_bottom(view);
if (view->bottom) view->more_text = FALSE;
if (view->window != NULL)
term_refresh(view->window);
}
static void view_remove_line_update_startline(TEXT_BUFFER_VIEW_REC *view,
LINE_REC *line, int linecount)
{
int scroll;
if (view->startline == line) {
view->startline = view->startline->prev != NULL ?
view->startline->prev : view->startline->next;
view->subline = 0;
} else {
scroll = view->height -
view_get_lines_height(view, view->startline,
view->subline, line);
if (scroll > 0) {
view_scroll(view, &view->startline,
&view->subline, -scroll, FALSE);
}
}
/* FIXME: this is slow and unnecessary, but it's easy and
really works :) */
textbuffer_view_init_ypos(view);
if (textbuffer_line_exists_after(view->startline, line))
view->ypos -= linecount;
}
/* Scroll the view up/down */
void textbuffer_view_scroll(TEXT_BUFFER_VIEW_REC *view, int lines)
{
int count;
g_return_if_fail(view != NULL);
count = view_scroll(view, &view->startline, &view->subline,
lines, TRUE);
view->ypos += lines < 0 ? count : -count;
view->bottom = view_is_bottom(view);
if (view->bottom) view->more_text = FALSE;
if (view->window != NULL)
term_refresh(view->window);
}
static void view_insert_line(TEXT_BUFFER_VIEW_REC *view, LINE_REC *line)
{
int linecount, ypos, subline;
if (!view->bottom)
view->more_text = TRUE;
if (view->bottom_startline == NULL) {
view->startline = view->bottom_startline =
view->buffer->first_line;
}
if (view->buffer->cur_line != line &&
!textbuffer_line_exists_after(view->bottom_startline, line))
return;
linecount = view->cache->last_linecount;
view->ypos += linecount;
if (view->empty_linecount > 0) {
view->empty_linecount -= linecount;
if (view->empty_linecount >= 0)
linecount = 0;
else {
linecount = -view->empty_linecount;
view->empty_linecount = 0;
}
}
if (linecount > 0) {
view_scroll(view, &view->bottom_startline,
&view->bottom_subline, linecount, FALSE);
}
if (view->bottom) {
if (view->scroll && view->ypos >= view->height) {
linecount = view->ypos-view->height+1;
view_scroll(view, &view->startline,
&view->subline, linecount, FALSE);
view->ypos -= linecount;
} else {
view->bottom = view_is_bottom(view);
}
if (view->window != NULL) {
ypos = view->ypos+1 - view->cache->last_linecount;
if (ypos >= 0)
subline = 0;
else {
subline = -ypos;
ypos = 0;
}
if (ypos < view->height) {
view_line_draw(view, line, subline, ypos,
view->height - ypos);
}
}
}
if (view->window != NULL)
term_refresh(view->window);
}
/* Resize the view. */
void textbuffer_view_resize(TEXT_BUFFER_VIEW_REC *view, int width, int height)
{
int linecount;
g_return_if_fail(view != NULL);
g_return_if_fail(width > 0);
if (view->width != width) {
/* line cache needs to be recreated */
textbuffer_cache_unref(view->cache);
view->cache = textbuffer_cache_get(view->siblings, width);
}
view->width = width > 10 ? width : 10;
view->height = height > 1 ? height : 1;
if (view->buffer->first_line == NULL) {
view->empty_linecount = height;
return;
}
textbuffer_view_init_bottom(view);
/* check that we didn't scroll lower than bottom startline.. */
if (textbuffer_line_exists_after(view->bottom_startline->next,
view->startline)) {
view->startline = view->bottom_startline;
view->subline = view->bottom_subline;
} else if (view->startline == view->bottom_startline &&
view->subline > view->bottom_subline) {
view->subline = view->bottom_subline;
} else {
/* make sure the subline is still in allowed range */
linecount = view_get_linecount(view, view->startline);
if (view->subline > linecount)
view->subline = linecount;
}
textbuffer_view_init_ypos(view);
if (view->bottom && !view_is_bottom(view)) {
/* we scrolled to far up, need to get down. go right over
the empty lines if there's any */
view->startline = view->bottom_startline;
view->subline = view->bottom_subline;
if (view->empty_linecount > 0) {
view_scroll(view, &view->startline, &view->subline,
-view->empty_linecount, FALSE);
}
textbuffer_view_init_ypos(view);
}
view->bottom = view_is_bottom(view);
if (view->bottom) {
/* check if we left empty space at the bottom.. */
linecount = view_get_linecount_all(view, view->startline) -
view->subline;
if (view->empty_linecount < view->height-linecount)
view->empty_linecount = view->height-linecount;
view->more_text = FALSE;
}
view->dirty = TRUE;
}