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Redraw from buffer as necessary during resize (finish resize support).

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This commit is contained in:
Michael Jumper 2013-05-02 12:35:20 -07:00
parent ac52c8fb64
commit de5b945f73
2 changed files with 52 additions and 4 deletions
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5
protocols/ssh/src/buffer.c
View File

@ -99,7 +99,10 @@ guac_terminal_buffer_row* guac_terminal_buffer_get_row(guac_terminal_buffer* buf
/* Calculate scrollback row index */
int index = buffer->top + row;
if (index < 0) index += buffer->available;
if (index < 0)
index += buffer->available;
else if (index >= buffer->available)
index -= buffer->available;
/* Get row */
buffer_row = &(buffer->rows[index]);

51
protocols/ssh/src/terminal.c
View File

@ -412,6 +412,29 @@ void guac_terminal_set_columns(guac_terminal* terminal, int row,
}
static void __guac_terminal_redraw_rect(guac_terminal* term, int start_row, int start_col, int end_row, int end_col) {
int row, col;
/* Redraw region */
for (row=start_row; row<=end_row; row++) {
guac_terminal_buffer_row* buffer_row =
guac_terminal_buffer_get_row(term->buffer, row - term->scroll_offset, 0);
/* Clear row */
guac_terminal_display_set_columns(term->display,
row, start_col, end_col, &(term->default_char));
/* Copy characters */
for (col=start_col; col <= end_col && col < buffer_row->length; col++)
guac_terminal_display_set_columns(term->display, row, col, col,
&(buffer_row->characters[col]));
}
}
void guac_terminal_resize(guac_terminal* term, int width, int height) {
/* If height is decreasing, shift display up */
@ -436,6 +459,9 @@ void guac_terminal_resize(guac_terminal* term, int width, int height) {
term->buffer->top += shift_amount;
term->cursor_row -= shift_amount;
/* Redraw characters within old region */
__guac_terminal_redraw_rect(term, height - shift_amount, 0, height-1, width-1);
}
}
@ -444,6 +470,10 @@ void guac_terminal_resize(guac_terminal* term, int width, int height) {
guac_terminal_display_flush(term->display);
guac_terminal_display_resize(term->display, width, height);
/* Reraw any characters on right if widening */
if (width > term->term_width)
__guac_terminal_redraw_rect(term, 0, term->term_width-1, height-1, width-1);
/* If height is increasing, shift display down */
if (height > term->term_height) {
@ -464,21 +494,36 @@ void guac_terminal_resize(guac_terminal* term, int width, int height) {
term->cursor_row += shift_amount;
/* If scrolled enough, use scroll to fulfill entire resize */
if (term->scroll_offset >= shift_amount)
if (term->scroll_offset >= shift_amount) {
term->scroll_offset -= shift_amount;
/* Draw characters from scroll at bottom */
__guac_terminal_redraw_rect(term, term->term_height, 0, term->term_height + shift_amount - 1, width-1);
}
/* Otherwise, fulfill with as much scroll as possible */
else {
/* Attempt to fulfill part with scroll */
/* Draw characters from scroll at bottom */
__guac_terminal_redraw_rect(term, term->term_height, 0, term->term_height + term->scroll_offset - 1, width-1);
/* Update shift_amount and scroll based on new rows */
shift_amount -= term->scroll_offset;
term->scroll_offset = 0;
/* If anything remains, move screen as necessary */
if (shift_amount > 0)
if (shift_amount > 0) {
guac_terminal_display_copy_rows(term->display,
0, term->display->height - shift_amount - 1, shift_amount);
/* Draw characters at top from scroll */
__guac_terminal_redraw_rect(term, 0, 0, shift_amount - 1, width-1);
}
}
} /* end if undisplayed rows exist */