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* util.h (move_backward2): Fixed endless loop. Cleaned up code. The only case that's left with the old code is text mode with line wrapping. (move_backward2_textmode_wrap): The special case of moving some lines up in text mode with line wrapping enabled.

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This commit is contained in:
Roland Illig 2004-08-19 19:16:57 +00:00
parent a37fdaca96
commit ea14b320f7
2 changed files with 71 additions and 42 deletions
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9
src/ChangeLog
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@ -1,8 +1,17 @@
2004-08-19 Roland Illig <roland.illig@gmx.de>
* util.h (move_backward2): Fixed endless loop. Cleaned up code.
The only case that's left with the old code is text mode with
line wrapping. (move_backward2_textmode_wrap): The special case
of moving some lines up in text mode with line wrapping enabled.
2004-18-19 Roland Illig <roland.illig@gmx.de>
* util.h: Added the function free_after for easier handling
of dynamically allocated strings.
2004-18-19 Roland Illig <roland.illig@gmx.de>
* util.c: Added the function str_replace, which replaces
all occurences of a character in a string.

104
src/view.c
View File

@ -1261,6 +1261,36 @@ move_forward2 (WView *view, offset_type current, int lines, offset_type upto)
return current;
}
/* special case for text (non-hex) mode with line wrapping. */
static offset_type
move_backward2_textmode_wrap (WView * view, offset_type current, int lines)
{
offset_type p, q, pm;
int line;
if (current == view->last_byte && get_byte (view, current - 1) != '\n')
/* There is one virtual '\n' at the end,
so that the last line is shown */
line = 1;
else
line = 0;
for (q = p = current - 1; p > view->first; p--) {
if (get_byte (view, p) == '\n' || p == view->first) {
pm = p > view->first ? p + 1 : view->first;
line += move_forward2 (view, pm, 0, q);
if (line >= lines) {
if (line == lines)
return pm;
else
return move_forward2 (view, pm, line - lines, 0);
}
q = p + 1;
}
}
return p > view->first ? p : view->first;
}
/* returns the new current pointer */
/* Cause even the forward routine became very complex, we in the wrap_mode
just find the nearest '\n', use move_forward2(p, 0, q) to get the count
@ -1272,51 +1302,41 @@ move_backward2 (WView *view, offset_type current, int lines)
offset_type p, q, pm;
int line;
if (!view->hex_mode && current == view->first)
return current;
if (view->hex_mode) {
p = current - lines * view->bytes_per_line;
p = (p < view->first) ? view->first : p;
if (lines == 1) {
q = view->edit_cursor - view->bytes_per_line;
view->edit_cursor = (q < view->first) ? view->edit_cursor : q;
p = (view->edit_cursor >= current) ? current : p;
} else {
q = p + ((LINES - 2) * view->bytes_per_line);
view->edit_cursor = (view->edit_cursor >= q) ?
p : view->edit_cursor;
}
return p;
if (view->edit_cursor >= lines * view->bytes_per_line) {
view->edit_cursor -= lines * view->bytes_per_line;
} else {
view->edit_cursor %= view->bytes_per_line;
}
if (current >= lines * view->bytes_per_line) {
current -= lines * view->bytes_per_line;
} else {
current %= view->bytes_per_line;
}
return current;
} else {
if (current == view->last_byte
&& get_byte (view, current - 1) != '\n')
/* There is one virtual '\n' at the end,
so that the last line is shown */
line = 1;
else
line = 0;
for (q = p = current - 1; p >= view->first; p--)
if (get_byte (view, p) == '\n' || p == view->first) {
pm = p > view->first ? p + 1 : view->first;
if (!view->wrap_mode) {
if (line == lines)
return pm;
line++;
} else {
line += move_forward2 (view, pm, 0, q);
if (line >= lines) {
if (line == lines)
return pm;
else
return move_forward2 (view, pm, line - lines,
0);
}
q = p + 1;
}
}
if (current == view->first)
return current;
if (view->wrap_mode)
return move_backward2_textmode_wrap (view, current, lines);
/* There is one virtual '\n' at the end,
* so that the last line is shown */
if (current == view->last_byte && get_byte (view, current - 1) != '\n')
lines--;
while (current > view->first && get_byte(view, current - 1) != '\n')
current--;
while (lines > 0) {
if (current > view->first)
current--;
lines--;
while (current > view->first && get_byte(view, current - 1) != '\n')
current--;
}
return current;
}
return p > view->first ? p : view->first;
return current; /* unreached */
}
static void