guacamole-spice-protocol/src/terminal/terminal.c

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/*
* Copyright (C) 2013 Glyptodon LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
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#include "config.h"
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#include "buffer.h"
#include "blank.h"
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#include "common.h"
#include "cursor.h"
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#include "display.h"
#include "ibar.h"
#include "guac_clipboard.h"
#include "packet.h"
#include "pointer.h"
#include "scrollbar.h"
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#include "terminal.h"
#include "terminal_handlers.h"
#include "types.h"
#include "typescript.h"
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#include <pthread.h>
#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
#include <string.h>
#include <sys/select.h>
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#include <sys/time.h>
#include <unistd.h>
#include <wchar.h>
#include <guacamole/client.h>
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#include <guacamole/error.h>
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#include <guacamole/protocol.h>
#include <guacamole/socket.h>
#include <guacamole/timestamp.h>
/**
* Sets the given range of columns to the given character.
*/
static void __guac_terminal_set_columns(guac_terminal* terminal, int row,
int start_column, int end_column, guac_terminal_char* character) {
guac_terminal_display_set_columns(terminal->display, row + terminal->scroll_offset,
start_column, end_column, character);
guac_terminal_buffer_set_columns(terminal->buffer, row,
start_column, end_column, character);
}
/**
* Enforces a character break at the given edge, ensuring that the left side
* of the edge is the final column of a character, and the right side of the
* edge is the initial column of a DIFFERENT character.
*
* For a character in a column N, the left edge number is N, and the right
* edge is N+1.
*/
static void __guac_terminal_force_break(guac_terminal* terminal, int row, int edge) {
guac_terminal_buffer_row* buffer_row = guac_terminal_buffer_get_row(terminal->buffer, row, 0);
/* Ensure character to left of edge is unbroken */
if (edge > 0) {
int end_column = edge - 1;
int start_column = end_column;
guac_terminal_char* start_char = &(buffer_row->characters[start_column]);
/* Determine start column */
while (start_column > 0 && start_char->value == GUAC_CHAR_CONTINUATION) {
start_char--;
start_column--;
}
/* Advance to start of broken character if necessary */
if (start_char->value != GUAC_CHAR_CONTINUATION && start_char->width < end_column - start_column + 1) {
start_column += start_char->width;
start_char += start_char->width;
}
/* Clear character if broken */
if (start_char->value == GUAC_CHAR_CONTINUATION || start_char->width != end_column - start_column + 1) {
guac_terminal_char cleared_char;
cleared_char.value = ' ';
cleared_char.attributes = start_char->attributes;
cleared_char.width = 1;
__guac_terminal_set_columns(terminal, row, start_column, end_column, &cleared_char);
}
}
/* Ensure character to right of edge is unbroken */
if (edge >= 0 && edge < buffer_row->length) {
int start_column = edge;
int end_column = start_column;
guac_terminal_char* start_char = &(buffer_row->characters[start_column]);
guac_terminal_char* end_char = &(buffer_row->characters[end_column]);
/* Determine end column */
while (end_column+1 < buffer_row->length && (end_char+1)->value == GUAC_CHAR_CONTINUATION) {
end_char++;
end_column++;
}
/* Advance to start of broken character if necessary */
if (start_char->value != GUAC_CHAR_CONTINUATION && start_char->width < end_column - start_column + 1) {
start_column += start_char->width;
start_char += start_char->width;
}
/* Clear character if broken */
if (start_char->value == GUAC_CHAR_CONTINUATION || start_char->width != end_column - start_column + 1) {
guac_terminal_char cleared_char;
cleared_char.value = ' ';
cleared_char.attributes = start_char->attributes;
cleared_char.width = 1;
__guac_terminal_set_columns(terminal, row, start_column, end_column, &cleared_char);
}
}
}
void guac_terminal_reset(guac_terminal* term) {
int row;
/* Set current state */
term->char_handler = guac_terminal_echo;
term->active_char_set = 0;
term->char_mapping[0] =
term->char_mapping[1] = NULL;
/* Reset cursor location */
term->cursor_row = term->visible_cursor_row = term->saved_cursor_row = 0;
term->cursor_col = term->visible_cursor_col = term->saved_cursor_col = 0;
/* Clear scrollback, buffer, and scroll region */
term->buffer->top = 0;
term->buffer->length = 0;
term->scroll_start = 0;
term->scroll_end = term->term_height - 1;
term->scroll_offset = 0;
/* Reset scrollbar bounds */
guac_terminal_scrollbar_set_bounds(term->scrollbar, term->term_height - term->buffer->length, 0);
guac_terminal_scrollbar_set_value(term->scrollbar, -term->scroll_offset);
/* Reset flags */
term->text_selected = false;
term->application_cursor_keys = false;
term->automatic_carriage_return = false;
term->insert_mode = false;
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/* Reset tabs */
term->tab_interval = 8;
memset(term->custom_tabs, 0, sizeof(term->custom_tabs));
/* Clear terminal */
for (row=0; row<term->term_height; row++)
guac_terminal_set_columns(term, row, 0, term->term_width, &(term->default_char));
}
/**
* Paints or repaints the background of the terminal display. This painting
* occurs beneath the actual terminal and scrollbar layers, and thus will not
* overwrite any text or other content currently on the screen. This is only
* necessary to paint over parts of the terminal background which may otherwise
* be transparent (the default layer background).
*
* @param terminal
* The terminal whose background should be painted or repainted.
*
* @param width
* The width of the background to draw, in pixels.
*
* @param height
* The height of the background to draw, in pixels.
*/
static void guac_terminal_paint_background(guac_terminal* terminal,
int width, int height) {
guac_terminal_display* display = terminal->display;
guac_client* client = display->client;
guac_socket* socket = client->socket;
/* Get background color */
const guac_terminal_color* color =
&guac_terminal_palette[display->default_background];
/* Paint background color */
guac_protocol_send_rect(socket, GUAC_DEFAULT_LAYER, 0, 0, width, height);
guac_protocol_send_cfill(socket, GUAC_COMP_OVER, GUAC_DEFAULT_LAYER,
color->red, color->green, color->blue, 0xFF);
}
guac_terminal* guac_terminal_create(guac_client* client,
const char* font_name, int font_size, int dpi,
int width, int height, const char* color_scheme) {
int default_foreground;
int default_background;
/* Default to "gray-black" color scheme if no scheme provided */
if (color_scheme == NULL || color_scheme[0] == '\0') {
default_foreground = GUAC_TERMINAL_COLOR_GRAY;
default_background = GUAC_TERMINAL_COLOR_BLACK;
}
/* Otherwise, parse color scheme */
else if (strcmp(color_scheme, GUAC_TERMINAL_SCHEME_GRAY_BLACK) == 0) {
default_foreground = GUAC_TERMINAL_COLOR_GRAY;
default_background = GUAC_TERMINAL_COLOR_BLACK;
}
else if (strcmp(color_scheme, GUAC_TERMINAL_SCHEME_BLACK_WHITE) == 0) {
default_foreground = GUAC_TERMINAL_COLOR_BLACK;
default_background = GUAC_TERMINAL_COLOR_WHITE;
}
else if (strcmp(color_scheme, GUAC_TERMINAL_SCHEME_GREEN_BLACK) == 0) {
default_foreground = GUAC_TERMINAL_COLOR_DARK_GREEN;
default_background = GUAC_TERMINAL_COLOR_BLACK;
}
else if (strcmp(color_scheme, GUAC_TERMINAL_SCHEME_WHITE_BLACK) == 0) {
default_foreground = GUAC_TERMINAL_COLOR_WHITE;
default_background = GUAC_TERMINAL_COLOR_BLACK;
}
/* If invalid, default to "gray-black" */
else {
guac_client_log(client, GUAC_LOG_WARNING,
"Invalid color scheme: \"%s\". Defaulting to \"gray-black\".",
color_scheme);
default_foreground = GUAC_TERMINAL_COLOR_GRAY;
default_background = GUAC_TERMINAL_COLOR_BLACK;
}
/* Build default character using default colors */
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guac_terminal_char default_char = {
.value = 0,
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.attributes = {
.foreground = default_foreground,
.background = default_background,
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.bold = false,
.reverse = false,
.underscore = false
},
.width = 1
};
/* Calculate available display area */
int available_width = width - GUAC_TERMINAL_SCROLLBAR_WIDTH;
if (available_width < 0)
available_width = 0;
guac_terminal* term = malloc(sizeof(guac_terminal));
term->client = client;
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term->upload_path_handler = NULL;
term->file_download_handler = NULL;
/* Init buffer */
term->buffer = guac_terminal_buffer_alloc(1000, &default_char);
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/* Init display */
term->display = guac_terminal_display_alloc(client,
font_name, font_size, dpi,
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default_char.attributes.foreground,
default_char.attributes.background);
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/* Fail if display init failed */
if (term->display == NULL) {
guac_client_log(client, GUAC_LOG_DEBUG, "Display initialization failed");
free(term);
return NULL;
}
/* Init terminal state */
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term->current_attributes = default_char.attributes;
term->default_char = default_char;
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term->term_width = available_width / term->display->char_width;
term->term_height = height / term->display->char_height;
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/* Open STDOUT pipe */
if (pipe(term->stdout_pipe_fd)) {
guac_error = GUAC_STATUS_SEE_ERRNO;
guac_error_message = "Unable to open pipe for STDOUT";
free(term);
return NULL;
}
/* Open STDIN pipe */
if (pipe(term->stdin_pipe_fd)) {
guac_error = GUAC_STATUS_SEE_ERRNO;
guac_error_message = "Unable to open pipe for STDIN";
free(term);
return NULL;
}
/* Init pipe stream (output to display by default) */
term->pipe_stream = NULL;
/* No typescript by default */
term->typescript = NULL;
/* Init terminal lock */
pthread_mutex_init(&(term->lock), NULL);
/* Size display */
guac_protocol_send_size(term->display->client->socket,
GUAC_DEFAULT_LAYER, width, height);
guac_terminal_paint_background(term, width, height);
guac_terminal_display_resize(term->display,
term->term_width, term->term_height);
/* Allocate scrollbar */
term->scrollbar = guac_terminal_scrollbar_alloc(term->client,
GUAC_DEFAULT_LAYER, width, height, term->term_height);
/* Associate scrollbar with this terminal */
term->scrollbar->data = term;
term->scrollbar->scroll_handler = guac_terminal_scroll_handler;
/* Init terminal */
guac_terminal_reset(term);
term->mod_alt =
term->mod_ctrl =
term->mod_shift = 0;
/* Set up mouse cursors */
term->pointer_cursor = guac_terminal_create_pointer(client);
term->ibar_cursor = guac_terminal_create_ibar(client);
term->blank_cursor = guac_terminal_create_blank(client);
/* Initialize mouse cursor */
term->current_cursor = term->blank_cursor;
guac_terminal_set_cursor(term->client, term->current_cursor);
/* Allocate clipboard */
term->clipboard = guac_common_clipboard_alloc(GUAC_TERMINAL_CLIPBOARD_MAX_LENGTH);
return term;
}
void guac_terminal_free(guac_terminal* term) {
/* Close and flush any open pipe stream */
guac_terminal_pipe_stream_close(term);
/* Close and flush any active typescript */
guac_terminal_typescript_free(term->typescript);
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/* Close terminal output pipe */
close(term->stdout_pipe_fd[1]);
close(term->stdout_pipe_fd[0]);
/* Close user input pipe */
close(term->stdin_pipe_fd[1]);
close(term->stdin_pipe_fd[0]);
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/* Free display */
guac_terminal_display_free(term->display);
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/* Free buffer */
guac_terminal_buffer_free(term->buffer);
/* Free clipboard */
guac_common_clipboard_free(term->clipboard);
/* Free scrollbar */
guac_terminal_scrollbar_free(term->scrollbar);
/* Free cursors */
guac_terminal_cursor_free(term->client, term->pointer_cursor);
guac_terminal_cursor_free(term->client, term->ibar_cursor);
guac_terminal_cursor_free(term->client, term->blank_cursor);
}
/**
* Waits for data to become available on the given file descriptor.
*
* @param fd
* The file descriptor to wait on.
*
* @param msec_timeout
* The maximum amount of time to wait, in milliseconds.
*
* @return
* A positive if data is available, zero if the timeout has elapsed without
* data becoming available, or negative if an error occurred.
*/
static int guac_terminal_wait_for_data(int fd, int msec_timeout) {
/* Build fd_set */
fd_set fds;
FD_ZERO(&fds);
FD_SET(fd, &fds);
/* Split millisecond timeout into seconds and microseconds */
struct timeval timeout = {
.tv_sec = msec_timeout / 1000,
.tv_usec = (msec_timeout % 1000) * 1000
};
/* Wait for data */
return select(fd+1, &fds, NULL, NULL, &timeout);
}
int guac_terminal_render_frame(guac_terminal* terminal) {
guac_client* client = terminal->client;
char buffer[GUAC_TERMINAL_PACKET_SIZE];
int wait_result;
int fd = terminal->stdout_pipe_fd[0];
/* Wait for data to be available */
wait_result = guac_terminal_wait_for_data(fd, 1000);
if (wait_result > 0) {
guac_terminal_lock(terminal);
guac_timestamp frame_start = guac_timestamp_current();
do {
guac_timestamp frame_end;
int frame_remaining;
int bytes_read;
/* Read data, write to terminal */
if ((bytes_read = guac_terminal_packet_read(fd,
buffer, sizeof(buffer))) > 0) {
if (guac_terminal_write(terminal, buffer, bytes_read)) {
guac_client_abort(client,
GUAC_PROTOCOL_STATUS_SERVER_ERROR,
"Error writing data");
guac_terminal_unlock(terminal);
return 1;
}
}
/* Notify on error */
if (bytes_read < 0) {
guac_client_abort(client, GUAC_PROTOCOL_STATUS_SERVER_ERROR,
"Error reading data");
guac_terminal_unlock(terminal);
return 1;
}
/* Calculate time remaining in frame */
frame_end = guac_timestamp_current();
frame_remaining = frame_start + GUAC_TERMINAL_FRAME_DURATION
- frame_end;
/* Wait again if frame remaining */
if (frame_remaining > 0)
wait_result = guac_terminal_wait_for_data(fd,
GUAC_TERMINAL_FRAME_TIMEOUT);
else
break;
} while (wait_result > 0);
/* Flush terminal */
guac_terminal_flush(terminal);
guac_terminal_unlock(terminal);
}
/* Notify of any errors */
if (wait_result < 0) {
guac_client_abort(client, GUAC_PROTOCOL_STATUS_SERVER_ERROR,
"Error waiting for data");
return 1;
}
return 0;
}
int guac_terminal_read_stdin(guac_terminal* terminal, char* c, int size) {
int stdin_fd = terminal->stdin_pipe_fd[0];
return read(stdin_fd, c, size);
}
int guac_terminal_write_stdout(guac_terminal* terminal, const char* c,
int size) {
/* Write maximally-sized packets until only one packet remains */
while (size > GUAC_TERMINAL_PACKET_SIZE) {
/* Write maximally-sized packet */
if (guac_terminal_packet_write(terminal->stdout_pipe_fd[1], c,
GUAC_TERMINAL_PACKET_SIZE) < 0)
return -1;
/* Advance to next packet */
c += GUAC_TERMINAL_PACKET_SIZE;
size -= GUAC_TERMINAL_PACKET_SIZE;
}
return guac_terminal_packet_write(terminal->stdout_pipe_fd[1], c, size);
}
int guac_terminal_notify(guac_terminal* terminal) {
return guac_terminal_packet_write(terminal->stdout_pipe_fd[1], NULL, 0);
}
int guac_terminal_printf(guac_terminal* terminal, const char* format, ...) {
int written;
va_list ap;
char buffer[1024];
/* Print to buffer */
va_start(ap, format);
written = vsnprintf(buffer, sizeof(buffer)-1, format, ap);
va_end(ap);
if (written < 0)
return written;
/* Write to STDOUT */
return guac_terminal_write_stdout(terminal, buffer, written);
}
void guac_terminal_prompt(guac_terminal* terminal, const char* title, char* str, int size, bool echo) {
int pos;
char in_byte;
/* Print title */
guac_terminal_printf(terminal, "%s", title);
/* Make room for null terminator */
size--;
/* Read bytes until newline */
pos = 0;
while (pos < size && guac_terminal_read_stdin(terminal, &in_byte, 1) == 1) {
/* Backspace */
if (in_byte == 0x7F) {
if (pos > 0) {
guac_terminal_printf(terminal, "\b \b");
pos--;
}
}
/* CR (end of input */
else if (in_byte == 0x0D) {
guac_terminal_printf(terminal, "\r\n");
break;
}
else {
/* Store character, update buffers */
str[pos++] = in_byte;
/* Print character if echoing */
if (echo)
guac_terminal_printf(terminal, "%c", in_byte);
else
guac_terminal_printf(terminal, "*");
}
}
/* Terminate string */
str[pos] = 0;
}
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int guac_terminal_set(guac_terminal* term, int row, int col, int codepoint) {
int width;
/* Build character with current attributes */
guac_terminal_char guac_char;
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guac_char.value = codepoint;
guac_char.attributes = term->current_attributes;
width = wcwidth(codepoint);
if (width < 0)
width = 1;
guac_char.width = width;
guac_terminal_set_columns(term, row, col, col + width - 1, &guac_char);
return 0;
}
void guac_terminal_commit_cursor(guac_terminal* term) {
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guac_terminal_char* guac_char;
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guac_terminal_buffer_row* old_row;
guac_terminal_buffer_row* new_row;
/* If no change, done */
if (term->visible_cursor_row == term->cursor_row && term->visible_cursor_col == term->cursor_col)
return;
/* Get old and new rows with cursor */
new_row = guac_terminal_buffer_get_row(term->buffer, term->cursor_row, term->cursor_col+1);
old_row = guac_terminal_buffer_get_row(term->buffer, term->visible_cursor_row, term->visible_cursor_col+1);
/* Clear cursor */
guac_char = &(old_row->characters[term->visible_cursor_col]);
guac_char->attributes.cursor = false;
guac_terminal_display_set_columns(term->display, term->visible_cursor_row + term->scroll_offset,
term->visible_cursor_col, term->visible_cursor_col, guac_char);
/* Set cursor */
guac_char = &(new_row->characters[term->cursor_col]);
guac_char->attributes.cursor = true;
guac_terminal_display_set_columns(term->display, term->cursor_row + term->scroll_offset,
term->cursor_col, term->cursor_col, guac_char);
term->visible_cursor_row = term->cursor_row;
term->visible_cursor_col = term->cursor_col;
return;
}
int guac_terminal_write(guac_terminal* term, const char* c, int size) {
while (size > 0) {
/* Read and advance to next character */
char current = *(c++);
size--;
/* Write character to typescript, if any */
if (term->typescript != NULL)
guac_terminal_typescript_write(term->typescript, current);
/* Handle character and its meaning */
term->char_handler(term, current);
}
return 0;
}
int guac_terminal_scroll_up(guac_terminal* term,
int start_row, int end_row, int amount) {
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/* If scrolling entire display, update scroll offset */
if (start_row == 0 && end_row == term->term_height - 1) {
/* Scroll up visibly */
guac_terminal_display_copy_rows(term->display, start_row + amount, end_row, -amount);
/* Advance by scroll amount */
term->buffer->top += amount;
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if (term->buffer->top >= term->buffer->available)
term->buffer->top -= term->buffer->available;
term->buffer->length += amount;
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if (term->buffer->length > term->buffer->available)
term->buffer->length = term->buffer->available;
/* Reset scrollbar bounds */
guac_terminal_scrollbar_set_bounds(term->scrollbar, term->term_height - term->buffer->length, 0);
/* Update cursor location if within region */
if (term->visible_cursor_row >= start_row &&
term->visible_cursor_row <= end_row)
term->visible_cursor_row -= amount;
}
/* Otherwise, just copy row data upwards */
else
guac_terminal_copy_rows(term, start_row + amount, end_row, -amount);
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/* Clear new area */
guac_terminal_clear_range(term,
end_row - amount + 1, 0,
end_row, term->term_width - 1);
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return 0;
}
int guac_terminal_scroll_down(guac_terminal* term,
int start_row, int end_row, int amount) {
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guac_terminal_copy_rows(term, start_row, end_row - amount, amount);
/* Clear new area */
guac_terminal_clear_range(term,
start_row, 0,
start_row + amount - 1, term->term_width - 1);
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return 0;
}
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int guac_terminal_clear_columns(guac_terminal* term,
int row, int start_col, int end_col) {
/* Build space */
guac_terminal_char blank;
blank.value = 0;
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blank.attributes = term->current_attributes;
blank.width = 1;
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/* Clear */
guac_terminal_set_columns(term,
row, start_col, end_col, &blank);
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return 0;
}
int guac_terminal_clear_range(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 */
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guac_terminal_clear_columns(term,
start_row, start_col, term->term_width - 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 */
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guac_terminal_clear_columns(term, end_row, 0, end_col);
/* One less row to clear */
end_row--;
}
/* Remaining region now guaranteed rectangular. Clear, if possible */
if (start_row <= end_row) {
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int row;
for (row=start_row; row<=end_row; row++) {
/* Clear entire row */
guac_terminal_clear_columns(term, row, 0, term->term_width - 1);
}
}
return 0;
}
void guac_terminal_scroll_display_down(guac_terminal* terminal,
int scroll_amount) {
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int start_row, end_row;
int dest_row;
int row, column;
/* Limit scroll amount by size of scrollback buffer */
if (scroll_amount > terminal->scroll_offset)
scroll_amount = terminal->scroll_offset;
/* If not scrolling at all, don't bother trying */
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if (scroll_amount <= 0)
return;
/* Shift screen up */
if (terminal->term_height > scroll_amount)
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guac_terminal_display_copy_rows(terminal->display,
scroll_amount, terminal->term_height - 1,
-scroll_amount);
/* Advance by scroll amount */
terminal->scroll_offset -= scroll_amount;
guac_terminal_scrollbar_set_value(terminal->scrollbar, -terminal->scroll_offset);
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/* Get row range */
end_row = terminal->term_height - terminal->scroll_offset - 1;
start_row = end_row - scroll_amount + 1;
dest_row = terminal->term_height - scroll_amount;
/* Draw new rows from scrollback */
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for (row=start_row; row<=end_row; row++) {
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/* Get row from scrollback */
guac_terminal_buffer_row* buffer_row =
guac_terminal_buffer_get_row(terminal->buffer, row, 0);
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/* Clear row */
guac_terminal_display_set_columns(terminal->display,
dest_row, 0, terminal->display->width, &(terminal->default_char));
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/* Draw row */
guac_terminal_char* current = buffer_row->characters;
for (column=0; column<buffer_row->length; column++) {
/* Only draw if not blank */
if (guac_terminal_has_glyph(current->value))
guac_terminal_display_set_columns(terminal->display, dest_row, column, column, current);
current++;
}
/* Next row */
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dest_row++;
}
guac_terminal_notify(terminal);
}
void guac_terminal_scroll_display_up(guac_terminal* terminal,
int scroll_amount) {
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int start_row, end_row;
int dest_row;
int row, column;
/* Limit scroll amount by size of scrollback buffer */
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if (terminal->scroll_offset + scroll_amount > terminal->buffer->length - terminal->term_height)
scroll_amount = terminal->buffer->length - terminal->scroll_offset - terminal->term_height;
/* If not scrolling at all, don't bother trying */
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if (scroll_amount <= 0)
return;
/* Shift screen down */
if (terminal->term_height > scroll_amount)
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guac_terminal_display_copy_rows(terminal->display,
0, terminal->term_height - scroll_amount - 1,
scroll_amount);
/* Advance by scroll amount */
terminal->scroll_offset += scroll_amount;
guac_terminal_scrollbar_set_value(terminal->scrollbar, -terminal->scroll_offset);
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/* Get row range */
start_row = -terminal->scroll_offset;
end_row = start_row + scroll_amount - 1;
dest_row = 0;
/* Draw new rows from scrollback */
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for (row=start_row; row<=end_row; row++) {
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/* Get row from scrollback */
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guac_terminal_buffer_row* buffer_row =
guac_terminal_buffer_get_row(terminal->buffer, row, 0);
/* Clear row */
guac_terminal_display_set_columns(terminal->display,
dest_row, 0, terminal->display->width, &(terminal->default_char));
/* Draw row */
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guac_terminal_char* current = buffer_row->characters;
for (column=0; column<buffer_row->length; column++) {
/* Only draw if not blank */
if (guac_terminal_has_glyph(current->value))
guac_terminal_display_set_columns(terminal->display, dest_row, column, column, current);
current++;
}
/* Next row */
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dest_row++;
}
guac_terminal_notify(terminal);
}
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void guac_terminal_select_redraw(guac_terminal* terminal) {
int start_row = terminal->selection_start_row + terminal->scroll_offset;
int start_column = terminal->selection_start_column;
int end_row = terminal->selection_end_row + terminal->scroll_offset;
int end_column = terminal->selection_end_column;
/* Update start/end columns to include character width */
if (start_row > end_row || (start_row == end_row && start_column > end_column))
start_column += terminal->selection_start_width - 1;
else
end_column += terminal->selection_end_width - 1;
guac_terminal_display_select(terminal->display, start_row, start_column, end_row, end_column);
}
/**
* Locates the beginning of the character at the given row and column, updating
* the column to the starting column of that character. The width, if available,
* is returned. If the character has no defined width, 1 is returned.
*/
static int __guac_terminal_find_char(guac_terminal* terminal, int row, int* column) {
int start_column = *column;
guac_terminal_buffer_row* buffer_row = guac_terminal_buffer_get_row(terminal->buffer, row, 0);
if (start_column < buffer_row->length) {
/* Find beginning of character */
guac_terminal_char* start_char = &(buffer_row->characters[start_column]);
while (start_column > 0 && start_char->value == GUAC_CHAR_CONTINUATION) {
start_char--;
start_column--;
}
/* Use width, if available */
if (start_char->value != GUAC_CHAR_CONTINUATION) {
*column = start_column;
return start_char->width;
}
}
/* Default to one column wide */
return 1;
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}
void guac_terminal_select_start(guac_terminal* terminal, int row, int column) {
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int width = __guac_terminal_find_char(terminal, row, &column);
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terminal->selection_start_row =
terminal->selection_end_row = row;
terminal->selection_start_column =
terminal->selection_end_column = column;
terminal->selection_start_width =
terminal->selection_end_width = width;
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terminal->text_selected = true;
guac_terminal_select_redraw(terminal);
}
void guac_terminal_select_update(guac_terminal* terminal, int row, int column) {
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/* Only update if selection has changed */
if (row != terminal->selection_end_row
|| column < terminal->selection_end_column
|| column >= terminal->selection_end_column + terminal->selection_end_width) {
int width = __guac_terminal_find_char(terminal, row, &column);
terminal->selection_end_row = row;
terminal->selection_end_column = column;
terminal->selection_end_width = width;
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guac_terminal_select_redraw(terminal);
}
}
int __guac_terminal_buffer_string(guac_terminal_buffer_row* row, int start, int end, char* string) {
int length = 0;
int i;
for (i=start; i<=end; i++) {
int codepoint = row->characters[i].value;
/* If not null (blank), add to string */
if (codepoint != 0 && codepoint != GUAC_CHAR_CONTINUATION) {
int bytes = guac_terminal_encode_utf8(codepoint, string);
string += bytes;
length += bytes;
}
}
return length;
}
void guac_terminal_select_end(guac_terminal* terminal, char* string) {
/* Deselect */
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terminal->text_selected = false;
guac_terminal_display_commit_select(terminal->display);
guac_terminal_buffer_row* buffer_row;
int row;
int start_row, start_col;
int end_row, end_col;
/* Ensure proper ordering of start and end coords */
if (terminal->selection_start_row < terminal->selection_end_row
|| (terminal->selection_start_row == terminal->selection_end_row
&& terminal->selection_start_column < terminal->selection_end_column)) {
start_row = terminal->selection_start_row;
start_col = terminal->selection_start_column;
end_row = terminal->selection_end_row;
end_col = terminal->selection_end_column + terminal->selection_end_width - 1;
}
else {
end_row = terminal->selection_start_row;
end_col = terminal->selection_start_column + terminal->selection_start_width - 1;
start_row = terminal->selection_end_row;
start_col = terminal->selection_end_column;
}
/* If only one row, simply copy */
buffer_row = guac_terminal_buffer_get_row(terminal->buffer, start_row, 0);
if (end_row == start_row) {
if (buffer_row->length - 1 < end_col)
end_col = buffer_row->length - 1;
string += __guac_terminal_buffer_string(buffer_row, start_col, end_col, string);
}
/* Otherwise, copy multiple rows */
else {
/* Store first row */
string += __guac_terminal_buffer_string(buffer_row, start_col, buffer_row->length - 1, string);
/* Store all middle rows */
for (row=start_row+1; row<end_row; row++) {
buffer_row = guac_terminal_buffer_get_row(terminal->buffer, row, 0);
*(string++) = '\n';
string += __guac_terminal_buffer_string(buffer_row, 0, buffer_row->length - 1, string);
}
/* Store last row */
buffer_row = guac_terminal_buffer_get_row(terminal->buffer, end_row, 0);
if (buffer_row->length - 1 < end_col)
end_col = buffer_row->length - 1;
*(string++) = '\n';
string += __guac_terminal_buffer_string(buffer_row, 0, end_col, string);
}
/* Null terminator */
*string = 0;
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}
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void guac_terminal_copy_columns(guac_terminal* terminal, int row,
int start_column, int end_column, int offset) {
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guac_terminal_display_copy_columns(terminal->display, row + terminal->scroll_offset,
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start_column, end_column, offset);
guac_terminal_buffer_copy_columns(terminal->buffer, row,
start_column, end_column, offset);
/* Update cursor location if within region */
if (row == terminal->visible_cursor_row &&
terminal->visible_cursor_col >= start_column &&
terminal->visible_cursor_col <= end_column)
terminal->visible_cursor_col += offset;
/* Force breaks around destination region */
__guac_terminal_force_break(terminal, row, start_column + offset);
__guac_terminal_force_break(terminal, row, end_column + offset + 1);
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}
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void guac_terminal_copy_rows(guac_terminal* terminal,
int start_row, int end_row, int offset) {
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guac_terminal_display_copy_rows(terminal->display,
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start_row + terminal->scroll_offset, end_row + terminal->scroll_offset, offset);
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guac_terminal_buffer_copy_rows(terminal->buffer,
start_row, end_row, offset);
/* Update cursor location if within region */
if (terminal->visible_cursor_row >= start_row &&
terminal->visible_cursor_row <= end_row)
terminal->visible_cursor_row += offset;
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}
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void guac_terminal_set_columns(guac_terminal* terminal, int row,
int start_column, int end_column, guac_terminal_char* character) {
__guac_terminal_set_columns(terminal, row, start_column, end_column, character);
/* If visible cursor in current row, preserve state */
if (row == terminal->visible_cursor_row
&& terminal->visible_cursor_col >= start_column
&& terminal->visible_cursor_col <= end_column) {
/* Create copy of character with cursor attribute set */
guac_terminal_char cursor_character = *character;
cursor_character.attributes.cursor = true;
__guac_terminal_set_columns(terminal, row,
terminal->visible_cursor_col, terminal->visible_cursor_col, &cursor_character);
}
/* Force breaks around destination region */
__guac_terminal_force_break(terminal, row, start_column);
__guac_terminal_force_break(terminal, row, end_column + 1);
}
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++) {
/* Only redraw if not blank */
guac_terminal_char* c = &(buffer_row->characters[col]);
if (guac_terminal_has_glyph(c->value))
guac_terminal_display_set_columns(term->display, row, col, col, c);
}
}
}
/**
* Internal terminal resize routine. Accepts width/height in CHARACTERS
* (not pixels like the public function).
*/
static void __guac_terminal_resize(guac_terminal* term, int width, int height) {
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/* If height is decreasing, shift display up */
if (height < term->term_height) {
int shift_amount;
/* Get number of rows actually occupying terminal space */
int used_height = term->buffer->length;
if (used_height > term->term_height)
used_height = term->term_height;
shift_amount = used_height - height;
/* If the new terminal bottom covers N rows, shift up N rows */
if (shift_amount > 0) {
guac_terminal_display_copy_rows(term->display,
shift_amount, term->display->height - 1, -shift_amount);
/* Update buffer top and cursor row based on shift */
term->buffer->top += shift_amount;
term->cursor_row -= shift_amount;
term->visible_cursor_row -= shift_amount;
/* Redraw characters within old region */
__guac_terminal_redraw_rect(term, height - shift_amount, 0, height-1, width-1);
}
}
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/* Resize display */
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) {
/* If undisplayed rows exist in the buffer, shift them into view */
if (term->term_height < term->buffer->length) {
/* If the new terminal bottom reveals N rows, shift down N rows */
int shift_amount = height - term->term_height;
/* The maximum amount we can shift is the number of undisplayed rows */
int max_shift = term->buffer->length - term->term_height;
if (shift_amount > max_shift)
shift_amount = max_shift;
/* Update buffer top and cursor row based on shift */
term->buffer->top -= shift_amount;
term->cursor_row += shift_amount;
term->visible_cursor_row += shift_amount;
/* If scrolled enough, use scroll to fulfill entire resize */
if (term->scroll_offset >= shift_amount) {
term->scroll_offset -= shift_amount;
guac_terminal_scrollbar_set_value(term->scrollbar, -term->scroll_offset);
/* 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 {
/* 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;
guac_terminal_scrollbar_set_value(term->scrollbar, -term->scroll_offset);
/* If anything remains, move screen as necessary */
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 */
}
/* Keep cursor on screen */
if (term->cursor_row < 0) term->cursor_row = 0;
if (term->cursor_row >= height) term->cursor_row = height-1;
if (term->cursor_col < 0) term->cursor_col = 0;
if (term->cursor_col >= width) term->cursor_col = width-1;
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/* Commit new dimensions */
term->term_width = width;
term->term_height = height;
}
int guac_terminal_resize(guac_terminal* terminal, int width, int height) {
guac_terminal_display* display = terminal->display;
guac_client* client = display->client;
guac_socket* socket = client->socket;
/* Acquire exclusive access to terminal */
guac_terminal_lock(terminal);
/* Calculate available display area */
int available_width = width - GUAC_TERMINAL_SCROLLBAR_WIDTH;
if (available_width < 0)
available_width = 0;
/* Calculate dimensions */
int rows = height / display->char_height;
int columns = available_width / display->char_width;
/* Resize default layer to given pixel dimensions */
guac_protocol_send_size(socket, GUAC_DEFAULT_LAYER, width, height);
guac_terminal_paint_background(terminal, width, height);
/* Notify scrollbar of resize */
guac_terminal_scrollbar_parent_resized(terminal->scrollbar, width, height, rows);
guac_terminal_scrollbar_set_bounds(terminal->scrollbar, rows - terminal->buffer->length, 0);
/* Resize terminal if row/column dimensions have changed */
if (columns != terminal->term_width || rows != terminal->term_height) {
guac_client_log(client, GUAC_LOG_DEBUG,
"Resizing terminal to %ix%i", rows, columns);
/* Resize terminal */
__guac_terminal_resize(terminal, columns, rows);
/* Reset scroll region */
terminal->scroll_end = rows - 1;
}
/* Release terminal */
guac_terminal_unlock(terminal);
guac_terminal_notify(terminal);
return 0;
}
void guac_terminal_flush(guac_terminal* terminal) {
/* Flush typescript if in use */
if (terminal->typescript != NULL)
guac_terminal_typescript_flush(terminal->typescript);
/* Flush display state */
guac_terminal_commit_cursor(terminal);
guac_terminal_display_flush(terminal->display);
guac_terminal_scrollbar_flush(terminal->scrollbar);
}
void guac_terminal_lock(guac_terminal* terminal) {
pthread_mutex_lock(&(terminal->lock));
}
void guac_terminal_unlock(guac_terminal* terminal) {
pthread_mutex_unlock(&(terminal->lock));
}
int guac_terminal_send_data(guac_terminal* term, const char* data, int length) {
return guac_terminal_write_all(term->stdin_pipe_fd[1], data, length);
}
int guac_terminal_send_string(guac_terminal* term, const char* data) {
return guac_terminal_write_all(term->stdin_pipe_fd[1], data, strlen(data));
}
static int __guac_terminal_send_key(guac_terminal* term, int keysym, int pressed) {
/* Hide mouse cursor if not already hidden */
if (term->current_cursor != term->blank_cursor) {
term->current_cursor = term->blank_cursor;
guac_terminal_set_cursor(term->client, term->blank_cursor);
guac_terminal_notify(term);
}
/* Track modifiers */
if (keysym == 0xFFE3)
term->mod_ctrl = pressed;
else if (keysym == 0xFFE9)
term->mod_alt = pressed;
else if (keysym == 0xFFE1)
term->mod_shift = pressed;
/* If key pressed */
else if (pressed) {
/* Ctrl+Shift+V shortcut for paste */
if (keysym == 'V' && term->mod_ctrl)
return guac_terminal_send_data(term, term->clipboard->buffer, term->clipboard->length);
/* Shift+PgUp / Shift+PgDown shortcuts for scrolling */
if (term->mod_shift) {
/* Page up */
if (keysym == 0xFF55) {
guac_terminal_scroll_display_up(term, term->term_height);
return 0;
}
/* Page down */
if (keysym == 0xFF56) {
guac_terminal_scroll_display_down(term, term->term_height);
return 0;
}
}
/* Reset scroll */
if (term->scroll_offset != 0)
guac_terminal_scroll_display_down(term, term->scroll_offset);
/* If alt being held, also send escape character */
if (term->mod_alt)
return guac_terminal_send_string(term, "\x1B");
/* Translate Ctrl+letter to control code */
if (term->mod_ctrl) {
char data;
/* Keysyms for '@' through '_' are all conveniently in C0 order */
if (keysym >= '@' && keysym <= '_')
data = (char) (keysym - '@');
/* Handle lowercase as well */
else if (keysym >= 'a' && keysym <= 'z')
data = (char) (keysym - 'a' + 1);
/* Ctrl+? is DEL (0x7f) */
else if (keysym == '?')
data = 0x7F;
/* Map Ctrl+2 to same result as Ctrl+@ */
else if (keysym == '2')
data = 0x00;
/* Map Ctrl+3 through Ctrl-7 to the remaining C0 characters such that Ctrl+6 is the same as Ctrl+^ */
else if (keysym >= '3' && keysym <= '7')
data = (char) (keysym - '3' + 0x1B);
/* 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 */
guac_client_log(term->client, GUAC_LOG_DEBUG,
"Ignoring unknown keysym: 0x%X", keysym);
}
}
return 0;
}
int guac_terminal_send_key(guac_terminal* term, int keysym, int pressed) {
int result;
guac_terminal_lock(term);
result = __guac_terminal_send_key(term, keysym, pressed);
guac_terminal_unlock(term);
return result;
}
static int __guac_terminal_send_mouse(guac_terminal* term, int x, int y, int mask) {
guac_client* client = term->client;
guac_socket* socket = client->socket;
/* Determine which buttons were just released and pressed */
int released_mask = term->mouse_mask & ~mask;
int pressed_mask = ~term->mouse_mask & mask;
/* Notify scrollbar, do not handle anything handled by scrollbar */
if (guac_terminal_scrollbar_handle_mouse(term->scrollbar, x, y, mask)) {
/* Set pointer cursor if mouse is over scrollbar */
if (term->current_cursor != term->pointer_cursor) {
term->current_cursor = term->pointer_cursor;
guac_terminal_set_cursor(client, term->pointer_cursor);
}
guac_terminal_notify(term);
return 0;
}
term->mouse_mask = mask;
/* Show mouse cursor if not already shown */
if (term->current_cursor != term->ibar_cursor) {
term->current_cursor = term->ibar_cursor;
guac_terminal_set_cursor(client, term->ibar_cursor);
guac_terminal_notify(term);
}
/* Paste contents of clipboard on right or middle mouse button up */
if ((released_mask & GUAC_CLIENT_MOUSE_RIGHT) || (released_mask & GUAC_CLIENT_MOUSE_MIDDLE))
return guac_terminal_send_data(term, term->clipboard->buffer, term->clipboard->length);
/* If text selected, change state based on left mouse mouse button */
if (term->text_selected) {
/* If mouse button released, stop selection */
if (released_mask & GUAC_CLIENT_MOUSE_LEFT) {
int selected_length;
/* End selection and get selected text */
int selectable_size = term->term_width * term->term_height * sizeof(char);
char* string = malloc(selectable_size);
guac_terminal_select_end(term, string);
selected_length = strnlen(string, selectable_size);
/* Store new data */
guac_common_clipboard_reset(term->clipboard, "text/plain");
guac_common_clipboard_append(term->clipboard, string, selected_length);
free(string);
/* Send data */
guac_common_clipboard_send(term->clipboard, client);
guac_socket_flush(socket);
}
/* Otherwise, just update */
else
guac_terminal_select_update(term,
y / term->display->char_height - term->scroll_offset,
x / term->display->char_width);
}
/* Otherwise, if mouse button pressed AND moved, start selection */
else if (!(pressed_mask & GUAC_CLIENT_MOUSE_LEFT) &&
mask & GUAC_CLIENT_MOUSE_LEFT)
guac_terminal_select_start(term,
y / term->display->char_height - term->scroll_offset,
x / term->display->char_width);
/* Scroll up if wheel moved up */
if (released_mask & GUAC_CLIENT_MOUSE_SCROLL_UP)
guac_terminal_scroll_display_up(term, GUAC_TERMINAL_WHEEL_SCROLL_AMOUNT);
/* Scroll down if wheel moved down */
if (released_mask & GUAC_CLIENT_MOUSE_SCROLL_DOWN)
guac_terminal_scroll_display_down(term, GUAC_TERMINAL_WHEEL_SCROLL_AMOUNT);
return 0;
}
int guac_terminal_send_mouse(guac_terminal* term, int x, int y, int mask) {
int result;
guac_terminal_lock(term);
result = __guac_terminal_send_mouse(term, x, y, mask);
guac_terminal_unlock(term);
return result;
}
void guac_terminal_scroll_handler(guac_terminal_scrollbar* scrollbar, int value) {
guac_terminal* terminal = (guac_terminal*) scrollbar->data;
/* Calculate change in scroll offset */
int delta = -value - terminal->scroll_offset;
/* Update terminal based on change in scroll offset */
if (delta < 0)
guac_terminal_scroll_display_down(terminal, -delta);
else if (delta > 0)
guac_terminal_scroll_display_up(terminal, delta);
/* Update scrollbar value */
guac_terminal_scrollbar_set_value(scrollbar, value);
}
void guac_terminal_clipboard_reset(guac_terminal* term, const char* mimetype) {
guac_common_clipboard_reset(term->clipboard, mimetype);
}
void guac_terminal_clipboard_append(guac_terminal* term, const void* data, int length) {
guac_common_clipboard_append(term->clipboard, data, length);
}
int guac_terminal_sendf(guac_terminal* term, const char* format, ...) {
int written;
va_list ap;
char buffer[1024];
/* Print to buffer */
va_start(ap, format);
written = vsnprintf(buffer, sizeof(buffer)-1, format, ap);
va_end(ap);
if (written < 0)
return written;
/* Write to STDIN */
return guac_terminal_write_all(term->stdin_pipe_fd[1], buffer, written);
}
2013-05-26 08:49:47 +00:00
void guac_terminal_set_tab(guac_terminal* term, int column) {
int i;
/* Search for available space, set if available */
for (i=0; i<GUAC_TERMINAL_MAX_TABS; i++) {
/* Set tab if space free */
if (term->custom_tabs[i] == 0) {
term->custom_tabs[i] = column+1;
break;
}
}
}
void guac_terminal_unset_tab(guac_terminal* term, int column) {
int i;
/* Search for given tab, unset if found */
for (i=0; i<GUAC_TERMINAL_MAX_TABS; i++) {
/* Unset tab if found */
if (term->custom_tabs[i] == column+1) {
term->custom_tabs[i] = 0;
break;
}
}
}
void guac_terminal_clear_tabs(guac_terminal* term) {
term->tab_interval = 0;
memset(term->custom_tabs, 0, sizeof(term->custom_tabs));
}
int guac_terminal_next_tab(guac_terminal* term, int column) {
int i;
/* Determine tab stop from interval */
int tabstop;
if (term->tab_interval != 0)
tabstop = (column / term->tab_interval + 1) * term->tab_interval;
else
tabstop = term->term_width - 1;
/* Walk custom tabs, trying to find an earlier occurrence */
for (i=0; i<GUAC_TERMINAL_MAX_TABS; i++) {
int custom_tabstop = term->custom_tabs[i] - 1;
if (custom_tabstop != -1 && custom_tabstop > column && custom_tabstop < tabstop)
tabstop = custom_tabstop;
}
return tabstop;
}
void guac_terminal_pipe_stream_open(guac_terminal* term, const char* name) {
guac_client* client = term->client;
guac_socket* socket = client->socket;
/* Close existing stream, if any */
guac_terminal_pipe_stream_close(term);
/* Allocate and assign new pipe stream */
term->pipe_stream = guac_client_alloc_stream(client);
term->pipe_buffer_length = 0;
/* Open new pipe stream */
guac_protocol_send_pipe(socket, term->pipe_stream, "text/plain", name);
/* Log redirect at debug level */
guac_client_log(client, GUAC_LOG_DEBUG,
"Terminal output now redirected to pipe '%s'.", name);
}
void guac_terminal_pipe_stream_write(guac_terminal* term, char c) {
/* Append byte to buffer only if pipe is open */
if (term->pipe_stream != NULL) {
/* Flush buffer if no space is available */
if (term->pipe_buffer_length == sizeof(term->pipe_buffer))
guac_terminal_pipe_stream_flush(term);
/* Append single byte to buffer */
term->pipe_buffer[term->pipe_buffer_length++] = c;
}
}
void guac_terminal_pipe_stream_flush(guac_terminal* term) {
guac_client* client = term->client;
guac_socket* socket = client->socket;
guac_stream* pipe_stream = term->pipe_stream;
/* Write blob if data exists in buffer */
if (pipe_stream != NULL && term->pipe_buffer_length > 0) {
guac_protocol_send_blob(socket, pipe_stream,
term->pipe_buffer, term->pipe_buffer_length);
term->pipe_buffer_length = 0;
}
}
void guac_terminal_pipe_stream_close(guac_terminal* term) {
guac_client* client = term->client;
guac_socket* socket = client->socket;
guac_stream* pipe_stream = term->pipe_stream;
/* Close any existing pipe */
if (pipe_stream != NULL) {
/* Write end of stream */
guac_terminal_pipe_stream_flush(term);
guac_protocol_send_end(socket, pipe_stream);
/* Destroy stream */
guac_client_free_stream(client, pipe_stream);
term->pipe_stream = NULL;
/* Log redirect at debug level */
guac_client_log(client, GUAC_LOG_DEBUG,
"Terminal output now redirected to display.");
}
}
int guac_terminal_create_typescript(guac_terminal* term, const char* path,
const char* name, int create_path) {
/* Create typescript */
term->typescript = guac_terminal_typescript_alloc(path, name, create_path);
/* Typescript creation failed if NULL */
return term->typescript != NULL;
}