/**
* Sends the given character to the terminal at the given row and column,
* rendering the character immediately. This bypasses the guac_terminal_display
* mechanism and is intended for flushing of updates only.
*/
int __guac_terminal_set(guac_terminal_display* display, int row, int col, int codepoint) {
int width;
int bytes;
char utf8[4];
/* Use foreground color */
const guac_terminal_color* color =
&guac_terminal_palette[display->glyph_foreground];
/* Use background color */
const guac_terminal_color* background =
&guac_terminal_palette[display->glyph_background];
cairo_surface_t* surface;
cairo_t* cairo;
int surface_width, surface_height;
PangoLayout* layout;
int layout_width, layout_height;
int ideal_layout_width, ideal_layout_height;
/* Calculate width in columns */
width = wcwidth(codepoint);
if (width < 0)
width = 1;
/* Do nothing if glyph is empty */
if (width == 0)
return 0;
/* Convert to UTF-8 */
bytes = guac_terminal_encode_utf8(codepoint, utf8);
surface_width = width * display->char_width;
surface_height = display->char_height;
ideal_layout_width = surface_width * PANGO_SCALE;
ideal_layout_height = surface_height * PANGO_SCALE;
/* Prepare surface */
surface = cairo_image_surface_create(CAIRO_FORMAT_RGB24,
surface_width, surface_height);
cairo = cairo_create(surface);
/* Fill background */
cairo_set_source_rgb(cairo,
background->red / 255.0,
background->green / 255.0,
background->blue / 255.0);
cairo_rectangle(cairo, 0, 0, surface_width, surface_height);
cairo_fill(cairo);
/* Get layout */
layout = pango_cairo_create_layout(cairo);
pango_layout_set_font_description(layout, display->font_desc);
pango_layout_set_text(layout, utf8, bytes);
pango_layout_set_alignment(layout, PANGO_ALIGN_CENTER);
pango_layout_get_size(layout, &layout_width, &layout_height);
/* If layout bigger than available space, scale it back */
if (layout_width > ideal_layout_width || layout_height > ideal_layout_height) {
double scale = fmin(ideal_layout_width / (double) layout_width,
ideal_layout_height / (double) layout_height);
cairo_scale(cairo, scale, scale);
/* Update layout to reflect scaled surface */
pango_layout_set_width(layout, ideal_layout_width / scale);
pango_layout_set_height(layout, ideal_layout_height / scale);
pango_cairo_update_layout(cairo, layout);
}
/* Draw */
cairo_set_source_rgb(cairo,
color->red / 255.0,
color->green / 255.0,
color->blue / 255.0);
cairo_move_to(cairo, 0.0, 0.0);
pango_cairo_show_layout(cairo, layout);
/* Draw */
guac_common_surface_draw(display->display_surface,
display->char_width * col,
display->char_height * row,
surface);
/* Free all */
g_object_unref(layout);
cairo_destroy(cairo);
cairo_surface_destroy(surface);
return 0;
}
int ssh_guac_client_key_handler(guac_client* client, int keysym, int pressed) {
ssh_guac_client_data* client_data = (ssh_guac_client_data*) client->data;
guac_terminal* term = client_data->term;
/* Hide mouse cursor if not already hidden */
if (client_data->current_cursor != client_data->blank_cursor) {
pthread_mutex_lock(&(term->lock));
client_data->current_cursor = client_data->blank_cursor;
guac_ssh_set_cursor(client, client_data->blank_cursor);
guac_socket_flush(client->socket);
pthread_mutex_unlock(&(term->lock));
}
/* Track modifiers */
if (keysym == 0xFFE3)
client_data->mod_ctrl = pressed;
else if (keysym == 0xFFE9)
client_data->mod_alt = pressed;
else if (keysym == 0xFFE1)
client_data->mod_shift = pressed;
/* If key pressed */
else if (pressed) {
/* Ctrl+Shift+V shortcut for paste */
if (keysym == 'V' && client_data->mod_ctrl)
return guac_terminal_send_data(term, client_data->clipboard->buffer, client_data->clipboard->length);
/* Shift+PgUp / Shift+PgDown shortcuts for scrolling */
if (client_data->mod_shift) {
/* Page up */
if (keysym == 0xFF55) {
pthread_mutex_lock(&(term->lock));
guac_terminal_scroll_display_up(term, term->term_height);
pthread_mutex_unlock(&(term->lock));
return 0;
}
/* Page down */
if (keysym == 0xFF56) {
pthread_mutex_lock(&(term->lock));
guac_terminal_scroll_display_down(term, term->term_height);
pthread_mutex_unlock(&(term->lock));
return 0;
}
}
/* Reset scroll */
if (term->scroll_offset != 0) {
pthread_mutex_lock(&(term->lock));
guac_terminal_scroll_display_down(term, term->scroll_offset);
pthread_mutex_unlock(&(term->lock));
}
/* If alt being held, also send escape character */
if (client_data->mod_alt)
return guac_terminal_send_string(term, "\x1B");
/* Translate Ctrl+letter to control code */
if (client_data->mod_ctrl) {
char data;
/* If valid control code, send it */
if (keysym >= 'A' && keysym <= 'Z')
data = (char) (keysym - 'A' + 1);
else if (keysym >= 'a' && keysym <= 'z')
data = (char) (keysym - 'a' + 1);
/* Otherwise ignore */
else
return 0;
return guac_terminal_send_data(term, &data, 1);
}
/* Translate Unicode to UTF-8 */
else if ((keysym >= 0x00 && keysym <= 0xFF) || ((keysym & 0xFFFF0000) == 0x01000000)) {
int length;
char data[5];
length = guac_terminal_encode_utf8(keysym & 0xFFFF, data);
return guac_terminal_send_data(term, data, length);
}
/* Non-printable keys */
else {
if (keysym == 0xFF08) return guac_terminal_send_string(term, "\x7F"); /* Backspace */
if (keysym == 0xFF09) return guac_terminal_send_string(term, "\x09"); /* Tab */
if (keysym == 0xFF0D) return guac_terminal_send_string(term, "\x0D"); /* Enter */
if (keysym == 0xFF1B) return guac_terminal_send_string(term, "\x1B"); /* Esc */
if (keysym == 0xFF50) return guac_terminal_send_string(term, "\x1B[1~"); /* Home */
/* Arrow keys w/ application cursor */
if (term->application_cursor_keys) {
if (keysym == 0xFF51) return guac_terminal_send_string(term, "\x1BOD"); /* Left */
if (keysym == 0xFF52) return guac_terminal_send_string(term, "\x1BOA"); /* Up */
if (keysym == 0xFF53) return guac_terminal_send_string(term, "\x1BOC"); /* Right */
if (keysym == 0xFF54) return guac_terminal_send_string(term, "\x1BOB"); /* Down */
}
else {
if (keysym == 0xFF51) return guac_terminal_send_string(term, "\x1B[D"); /* Left */
if (keysym == 0xFF52) return guac_terminal_send_string(term, "\x1B[A"); /* Up */
if (keysym == 0xFF53) return guac_terminal_send_string(term, "\x1B[C"); /* Right */
if (keysym == 0xFF54) return guac_terminal_send_string(term, "\x1B[B"); /* Down */
}
if (keysym == 0xFF55) return guac_terminal_send_string(term, "\x1B[5~"); /* Page up */
if (keysym == 0xFF56) return guac_terminal_send_string(term, "\x1B[6~"); /* Page down */
if (keysym == 0xFF57) return guac_terminal_send_string(term, "\x1B[4~"); /* End */
if (keysym == 0xFF63) return guac_terminal_send_string(term, "\x1B[2~"); /* Insert */
if (keysym == 0xFFBE) return guac_terminal_send_string(term, "\x1B[[A"); /* F1 */
if (keysym == 0xFFBF) return guac_terminal_send_string(term, "\x1B[[B"); /* F2 */
if (keysym == 0xFFC0) return guac_terminal_send_string(term, "\x1B[[C"); /* F3 */
if (keysym == 0xFFC1) return guac_terminal_send_string(term, "\x1B[[D"); /* F4 */
if (keysym == 0xFFC2) return guac_terminal_send_string(term, "\x1B[[E"); /* F5 */
if (keysym == 0xFFC3) return guac_terminal_send_string(term, "\x1B[17~"); /* F6 */
if (keysym == 0xFFC4) return guac_terminal_send_string(term, "\x1B[18~"); /* F7 */
if (keysym == 0xFFC5) return guac_terminal_send_string(term, "\x1B[19~"); /* F8 */
if (keysym == 0xFFC6) return guac_terminal_send_string(term, "\x1B[20~"); /* F9 */
if (keysym == 0xFFC7) return guac_terminal_send_string(term, "\x1B[21~"); /* F10 */
if (keysym == 0xFFC8) return guac_terminal_send_string(term, "\x1B[22~"); /* F11 */
if (keysym == 0xFFC9) return guac_terminal_send_string(term, "\x1B[23~"); /* F12 */
if (keysym == 0xFFFF) return guac_terminal_send_string(term, "\x1B[3~"); /* Delete */
/* Ignore unknown keys */
}
}
return 0;
}
