corentin-soriano commented on code in PR #509:
URL: https://github.com/apache/guacamole-server/pull/509#discussion_r1567404805
##########
src/terminal/terminal.c:
##########
@@ -1801,8 +1801,8 @@ static int __guac_terminal_send_mouse(guac_terminal*
term, guac_user* user,
* pressed */
else if (mask & GUAC_CLIENT_MOUSE_LEFT) {
- int row = y / term->display->char_height - term->scroll_offset;
- int col = x / term->display->char_width;
+ int row = (y - term->display->margin) / term->display->char_height -
term->scroll_offset;
+ int col = (x - term->display->margin) / term->display->char_width;
Review Comment:
After checking, I did not encounter the issue during my tests because the
margin is smaller than char_height/width. The casting of -0.xxx becomes 0. The
anomaly would occur if the result of the division becomes <= to -1.
What I can propose is not allowing to go below 0:
```
y = y >= term->display->margin ? y - term->display->margin : 0;
x = x >= term->display->margin ? x - term->display->margin : 0;
```
And revert this :
```
int row = y / term->display->char_height - term->scroll_offset;
int col = x / term->display->char_width;
```
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