screen: clear existing cells when shrinking

[platform/upstream/libtsm.git] / src / tsm_screen.c

diff --git a/src/tsm_screen.c b/src/tsm_screen.c
index 634e004..24ffb56 100644 (file)
--- a/src/tsm_screen.c
+++ b/src/tsm_screen.c
@@ -654,7 +654,7 @@ int tsm_screen_resize(struct tsm_screen *con, unsigned int x,
                      unsigned int y)
 {
        struct line **cache;
-       unsigned int i, j, width, diff;
+       unsigned int i, j, width, diff, start;
        int ret;
        bool *tab_ruler;
 
@@ -738,20 +738,23 @@ int tsm_screen_resize(struct tsm_screen *con, unsigned int x,
        con->age = con->age_cnt;
 
        /* clear expansion/padding area */
+       start = x;
+       if (x > con->size_x)
+               start = con->size_x;
        for (j = 0; j < con->line_num; ++j) {
+               /* main-lines may go into SB, so clear all cells */
                i = 0;
                if (j < con->size_y)
-                       i = con->size_x;
+                       i = start;
 
-               /* main-lines may go into SB, so clear all cells */
                for ( ; i < con->main_lines[j]->size; ++i)
                        cell_init(con, &con->main_lines[j]->cells[i]);
 
+               /* alt-lines never go into SB, only clear visible cells */
                i = 0;
                if (j < con->size_y)
                        i = con->size_x;
 
-               /* alt-lines never go into SB, only clear visible cells */
                for ( ; i < x; ++i)
                        cell_init(con, &con->alt_lines[j]->cells[i]);
        }