static void report(const char *msg, ...)
{
static bool empty = TRUE;
struct view *view = display[current_view];
enum line_type type;
if (!empty || *msg) {
va_list args;
va_start(args, msg);
werase(status_win);
wmove(status_win, 0, 0);
if (*msg) {
vwprintw(status_win, msg, args);
empty = false;
} else{
empty = TRUE;
}
wrefresh(status_win);
va_end(args);
}
update_title_win(view);
if (view->lines) {
wmove(view->win, view->lineno - view->offset, view->width - 1);
wrefresh(view->win);
}
}
static void report(const char *msg, ...)
{
static bool empty = TRUE;
struct view *view = display[current_view];
if (!empty || *msg) {
va_list args;
va_start(args, msg);
werase(status_win);
wmove(status_win, 0, 0);
if (*msg) {
vwprintw(status_win, msg, args);
empty = false;
} else{
empty = TRUE;
}
wrefresh(status_win);
va_end(args);
}
#ifdef yaomoon
fprintf(moon_log,"927: report\n");
#endif
update_title_win(view);
if (view->lines) {
wmove(view->win, view->lineno - view->offset, view->width - 1);
wrefresh(view->win);
}
#ifdef yaomoon
while(1);
#endif
}
static void redraw_display(bool clear)
{
struct view *view;
view = display[0];
if (clear)
wclear(view->win);
redraw_view(view);
update_title_win(view);
}
static void move_view(struct view *view, int lines)
{
/* The rendering expects the new offset. */
view->offset += lines;
assert(0 <= view->offset && view->offset < view->lines);
assert(lines);
int line = lines > 0 ? view->height - lines : 0;
int end = line + (lines > 0 ? lines : -lines);
wscrl(view->win, lines);
for (; line < end; line++)
{
if (!view->render(view, line))
break;
}
/* Move current line into the view. */
if (view->lineno < view->offset)
{
view->lineno = view->offset;
view->render(view, 0);
}
else if (view->lineno >= view->offset + view->height)
{
view->lineno = view->offset + view->height - 1;
view->render(view, view->lineno - view->offset);
}
assert(view->offset <= view->lineno && view->lineno < view->lines);
redrawwin(view->win);
wrefresh(view->win);
update_title_win(view);
}
static void navigate_view(struct view *view, int request)
{
int steps;
switch (request) {
case REQ_MOVE_UP:
steps = -1;
break;
case REQ_MOVE_DOWN:
steps = 1;
break;
}
if (steps <= 0 && view->lineno == 0) {
report("already at first line");
return;
} else if (steps >= 0 && view->lineno + 1 == view->lines) {
report("already at last line");
return;
}
/* Move the current line */
view->lineno += steps;
assert(0 <= view->lineno && view->lineno < view->lines);
/* Repaint the old "current" line if we be scrolling */
view->render(view, view->lineno - steps - view->offset);
/* Check whether the view needs to be scrolled */
if (view->lineno < view->offset ||
view->lineno >= view->offset + view->height)
{
if (steps < 0 && -steps > view->offset)
{
steps = -view->offset;
}
else if (steps > 0)
{
if (view->lineno == view->lines - 1 &&
view->lines > view->height)
{
steps = view->lines - view->offset - 1;
if (steps >= view->height)
{
steps -= view->height - 1;
}
}
}
move_view(view, steps);
return;
}
/* Draw the current line */
view->render(view, view->lineno - view->offset);
redrawwin(view->win);
wrefresh(view->win);
update_title_win(view);
}
static int update_view(struct view *view)
{
char buffer[BUFSIZ];
char *line;
void **tmp;
int redraw_from = -1;
unsigned long lines = view->height;
char *top = "Binary file";
if (!view->pipe)
return TRUE;
/* Only redraw if lines are visible. */
if (view->offset + view->height >= view->lines)
redraw_from = view->lines - view->offset;
tmp = realloc(view->line, sizeof(*view->line) * (view->lines + lines));
if (!tmp)
goto alloc_error;
view->line = tmp;
while ((line = fgets(buffer, sizeof(buffer), view->pipe)))
{
int linelen;
linelen = strlen(line);
if (linelen)
line[linelen - 1] = 0;
if(!strncmp(line, top, strlen(top)))
continue;
if (!view->read(view, line))
goto alloc_error;
if (lines-- == 1)
break;
}
if (redraw_from >= 0) {
/* If this is an incremental update, redraw the previous line
* since for commits some members could have changed when
* loading the main view. */
if (redraw_from > 0)
redraw_from--;
/* Incrementally draw avoids flickering. */
redraw_view_from(view, redraw_from);
}
update_title_win(view);
if (ferror(view->pipe)) {
printw("Failed to read %s", view->cmd);
goto end;
} else if (feof(view->pipe)) {
report("load %d lines", view->lines);
goto end;
}
return TRUE;
alloc_error:
printw("Allocation failure");
end:
end_update(view);
return FALSE;
}
