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Added more abstract terminal functions, refactored away use of guac_send_* in terminial handlers, simplified code.

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This commit is contained in:
Michael Jumper 2011-08-05 00:20:09 -07:00
parent f2732acc5a
commit 638776e700
3 changed files with 138 additions and 104 deletions
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13
protocols/ssh/include/ssh_terminal.h
View File

@ -79,5 +79,18 @@ void ssh_guac_terminal_free(ssh_guac_terminal* term);
int ssh_guac_terminal_write(ssh_guac_terminal* term, const char* c, int size);
int ssh_guac_terminal_send_glyph(ssh_guac_terminal* term, int row, int col, char c);
int ssh_guac_terminal_copy(ssh_guac_terminal* term,
int src_row, int src_col, int rows, int cols,
int dst_row, int dst_col);
int ssh_guac_terminal_clear(ssh_guac_terminal* term,
int row, int col, int rows, int cols);
int ssh_guac_terminal_scroll_up(ssh_guac_terminal* term,
int start_row, int end_row, int amount);
int ssh_guac_terminal_clear_range(ssh_guac_terminal* term,
int start_row, int start_col,
int end_row, int end_col);
#endif

99
protocols/ssh/src/ssh_terminal.c
View File

@ -173,3 +173,102 @@ int ssh_guac_terminal_write(ssh_guac_terminal* term, const char* c, int size) {
}
int ssh_guac_terminal_copy(ssh_guac_terminal* term,
int src_row, int src_col, int rows, int cols,
int dst_row, int dst_col) {
GUACIO* io = term->client->io;
/* Send copy instruction */
return guac_send_copy(io,
GUAC_DEFAULT_LAYER,
src_col * term->char_width, src_row * term->char_height,
cols * term->char_width, rows * term->char_height,
GUAC_COMP_SRC, GUAC_DEFAULT_LAYER,
dst_col * term->char_width, dst_row * term->char_height);
}
int ssh_guac_terminal_clear(ssh_guac_terminal* term,
int row, int col, int rows, int cols) {
GUACIO* io = term->client->io;
/* Fill with background */
return guac_send_rect(io,
GUAC_COMP_SRC, GUAC_DEFAULT_LAYER,
col * term->char_width, row * term->char_height,
cols * term->char_width, rows * term->char_height,
/* Background */
0, 0, 0, 255);
}
int ssh_guac_terminal_scroll_up(ssh_guac_terminal* term,
int start_row, int end_row, int amount) {
/* Calculate height of scroll region */
int height = end_row - start_row + 1;
return
/* Move rows within scroll region up by the given amount */
ssh_guac_terminal_copy(term,
start_row + amount, 0,
height - amount, term->term_width,
start_row, 0)
/* Fill new rows with background */
|| ssh_guac_terminal_clear(term,
end_row - amount + 1, 0, amount, term->term_width);
}
int ssh_guac_terminal_clear_range(ssh_guac_terminal* term,
int start_row, int start_col,
int end_row, int end_col) {
/* If not at far left, must clear sub-region to far right */
if (start_col > 0) {
/* Clear from start_col to far right */
if (ssh_guac_terminal_clear(term,
start_row, start_col, 1, term->term_width - start_col))
return 1;
/* One less row to clear */
start_row++;
}
/* If not at far right, must clear sub-region to far left */
if (end_col < term->term_width - 1) {
/* Clear from far left to end_col */
if (ssh_guac_terminal_clear(term,
end_row, 0, 1, end_col + 1))
return 1;
/* One less row to clear */
end_row--;
}
/* Remaining region now guaranteed rectangular. Clear, if possible */
if (start_row <= end_row) {
if (ssh_guac_terminal_clear(term,
start_row, 0, end_row - start_row + 1, term->term_width))
return 1;
}
return 0;
}

128
protocols/ssh/src/ssh_terminal_handlers.c
View File

@ -42,17 +42,12 @@
#include <pango/pangocairo.h>
#include <guacamole/log.h>
#include <guacamole/guacio.h>
#include <guacamole/protocol.h>
#include <guacamole/client.h>
#include "ssh_terminal.h"
#include "ssh_terminal_handlers.h"
int ssh_guac_terminal_echo(ssh_guac_terminal* term, char c) {
GUACIO* io = term->client->io;
/* Wrap if necessary */
if (term->cursor_col >= term->term_width) {
term->cursor_col = 0;
@ -63,20 +58,8 @@ int ssh_guac_terminal_echo(ssh_guac_terminal* term, char c) {
if (term->cursor_row >= term->term_height) {
term->cursor_row = term->term_height - 1;
/* Copy screen up by one row */
guac_send_copy(io,
GUAC_DEFAULT_LAYER, 0, term->char_height,
term->char_width * term->term_width,
term->char_height * (term->term_height - 1),
GUAC_COMP_SRC, GUAC_DEFAULT_LAYER, 0, 0);
/* Fill bottom row with background */
guac_send_rect(io,
GUAC_COMP_SRC, GUAC_DEFAULT_LAYER,
0, term->char_height * (term->term_height - 1),
term->char_width * term->term_width,
term->char_height * term->term_height,
0, 0, 0, 255);
/* Scroll up by one row */
ssh_guac_terminal_scroll_up(term, 0, term->term_height - 1, 1);
}
@ -155,8 +138,6 @@ int ssh_guac_terminal_charset(ssh_guac_terminal* term, char c) {
int ssh_guac_terminal_csi(ssh_guac_terminal* term, char c) {
GUACIO* io = term->client->io;
/* CSI function arguments */
static int argc = 0;
static int argv[16];
@ -206,65 +187,21 @@ int ssh_guac_terminal_csi(ssh_guac_terminal* term, char c) {
case 'J':
/* Erase from cursor to end of display */
if (argv[0] == 0) {
/* Until end of line */
guac_send_rect(io,
GUAC_COMP_SRC, GUAC_DEFAULT_LAYER,
term->cursor_col * term->char_width,
term->cursor_row * term->char_height,
(term->term_width - term->cursor_col) * term->char_width,
term->char_height,
0, 0, 0, 255); /* Background color */
/* Until end of display */
if (term->cursor_row < term->term_height - 1) {
guac_send_rect(io,
GUAC_COMP_SRC, GUAC_DEFAULT_LAYER,
0,
(term->cursor_row+1) * term->char_height,
term->term_width * term->char_width,
term->term_height * term->char_height,
0, 0, 0, 255); /* Background color */
}
}
if (argv[0] == 0)
ssh_guac_terminal_clear_range(term,
term->cursor_row, term->cursor_col,
term->term_height-1, term->term_width-1);
/* Erase from start to cursor */
else if (argv[0] == 1) {
/* Until start of line */
guac_send_rect(io,
GUAC_COMP_SRC, GUAC_DEFAULT_LAYER,
0,
term->cursor_row * term->char_height,
term->cursor_col * term->char_width,
term->char_height,
0, 0, 0, 255); /* Background color */
/* From start */
if (term->cursor_row >= 1) {
guac_send_rect(io,
GUAC_COMP_SRC, GUAC_DEFAULT_LAYER,
0,
0,
term->term_width * term->char_width,
(term->cursor_row-1) * term->char_height,
0, 0, 0, 255); /* Background color */
}
}
else if (argv[0] == 1)
ssh_guac_terminal_clear_range(term,
0, 0,
term->cursor_row, term->cursor_col);
/* Entire screen */
else if (argv[0] == 2) {
guac_send_rect(io,
GUAC_COMP_SRC, GUAC_DEFAULT_LAYER,
0,
0,
term->term_width * term->char_width,
term->term_height * term->char_height,
0, 0, 0, 255); /* Background color */
}
else if (argv[0] == 2)
ssh_guac_terminal_clear(term,
0, 0, term->term_height, term->term_width);
break;
@ -272,37 +209,22 @@ int ssh_guac_terminal_csi(ssh_guac_terminal* term, char c) {
case 'K':
/* Erase from cursor to end of line */
if (argv[0] == 0) {
guac_send_rect(io,
GUAC_COMP_SRC, GUAC_DEFAULT_LAYER,
term->cursor_col * term->char_width,
term->cursor_row * term->char_height,
(term->term_width - term->cursor_col) * term->char_width,
term->char_height,
0, 0, 0, 255); /* Background color */
}
if (argv[0] == 0)
ssh_guac_terminal_clear(term,
term->cursor_row, term->cursor_col,
1, term->term_width - term->cursor_col);
/* Erase from start to cursor */
else if (argv[0] == 1) {
guac_send_rect(io,
GUAC_COMP_SRC, GUAC_DEFAULT_LAYER,
0,
term->cursor_row * term->char_height,
term->cursor_col * term->char_width,
term->char_height,
0, 0, 0, 255); /* Background color */
}
else if (argv[0] == 1)
ssh_guac_terminal_clear(term,
term->cursor_row, 0,
1, term->cursor_col + 1);
/* Erase line */
else if (argv[0] == 2) {
guac_send_rect(io,
GUAC_COMP_SRC, GUAC_DEFAULT_LAYER,
0,
term->cursor_row * term->char_height,
term->term_width * term->char_width,
term->char_height,
0, 0, 0, 255); /* Background color */
}
else if (argv[0] == 2)
ssh_guac_terminal_clear(term,
term->cursor_row, 0,
1, term->term_width);
break;