584 lines
16 KiB
C
584 lines
16 KiB
C
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is libguac-client-ssh.
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*
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* The Initial Developer of the Original Code is
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* Michael Jumper.
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* Portions created by the Initial Developer are Copyright (C) 2011
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* James Muehlner <dagger10k@users.sourceforge.net>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include <stdlib.h>
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#include <string.h>
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#include <cairo/cairo.h>
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#include <pango/pangocairo.h>
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#include <guacamole/socket.h>
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#include <guacamole/protocol.h>
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#include <guacamole/client.h>
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#include "terminal.h"
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#include "terminal_handlers.h"
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const guac_terminal_color guac_terminal_palette[16] = {
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/* Normal colors */
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{0x00, 0x00, 0x00}, /* Black */
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{0x99, 0x3E, 0x3E}, /* Red */
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{0x3E, 0x99, 0x3E}, /* Green */
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{0x99, 0x99, 0x3E}, /* Brown */
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{0x3E, 0x3E, 0x99}, /* Blue */
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{0x99, 0x3E, 0x99}, /* Magenta */
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{0x3E, 0x99, 0x99}, /* Cyan */
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{0x99, 0x99, 0x99}, /* White */
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/* Intense colors */
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{0x3E, 0x3E, 0x3E}, /* Black */
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{0xFF, 0x67, 0x67}, /* Red */
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{0x67, 0xFF, 0x67}, /* Green */
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{0xFF, 0xFF, 0x67}, /* Brown */
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{0x67, 0x67, 0xFF}, /* Blue */
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{0xFF, 0x67, 0xFF}, /* Magenta */
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{0x67, 0xFF, 0xFF}, /* Cyan */
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{0xFF, 0xFF, 0xFF}, /* White */
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};
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guac_terminal* guac_terminal_create(guac_client* client,
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int width, int height) {
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guac_terminal_attributes default_attributes = {
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.foreground = 7,
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.background = 0,
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.bold = false,
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.reverse = false,
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.underscore = false
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};
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int row, col;
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PangoFontMap* font_map;
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PangoFont* font;
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PangoFontMetrics* metrics;
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PangoContext* context;
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guac_terminal* term = malloc(sizeof(guac_terminal));
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term->client = client;
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term->current_attributes =
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term->default_attributes = default_attributes;
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term->glyph_foreground = default_attributes.foreground;
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term->glyph_background = default_attributes.background;
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memset(term->glyphs, 0, sizeof(term->glyphs));
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term->glyph_stroke = guac_client_alloc_buffer(client);
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term->filled_glyphs = guac_client_alloc_buffer(client);
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/* Get font */
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term->font_desc = pango_font_description_new();
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pango_font_description_set_family(term->font_desc, "monospace");
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pango_font_description_set_weight(term->font_desc, PANGO_WEIGHT_NORMAL);
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pango_font_description_set_size(term->font_desc, 10*PANGO_SCALE);
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font_map = pango_cairo_font_map_get_default();
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context = pango_font_map_create_context(font_map);
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font = pango_font_map_load_font(font_map, context, term->font_desc);
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if (font == NULL) {
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guac_client_log_error(term->client, "Unable to get font.");
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return NULL;
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}
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metrics = pango_font_get_metrics(font, NULL);
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if (metrics == NULL) {
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guac_client_log_error(term->client, "Unable to get font metrics.");
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return NULL;
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}
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/* Calculate character dimensions */
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term->char_width =
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pango_font_metrics_get_approximate_digit_width(metrics) / PANGO_SCALE;
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term->char_height =
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(pango_font_metrics_get_descent(metrics)
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+ pango_font_metrics_get_ascent(metrics)) / PANGO_SCALE;
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term->cursor_row = 0;
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term->cursor_col = 0;
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term->cursor_layer = guac_client_alloc_layer(client);
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term->term_width = width / term->char_width;
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term->term_height = height / term->char_height;
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term->char_handler = guac_terminal_echo;
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term->scroll_start = 0;
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term->scroll_end = term->term_height - 1;
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/* Create scrollback buffer */
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term->scrollback = malloc(term->term_height * sizeof(guac_terminal_char*));
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/* Init buffer */
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for (row = 0; row < term->term_height; row++) {
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/* Create row */
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guac_terminal_char* current_row =
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term->scrollback[row] = malloc(term->term_width * sizeof(guac_terminal_char));
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/* Init row */
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for (col = 0; col < term->term_width; col++) {
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/* Empty character, default colors */
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current_row[col].value = '\0';
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current_row[col].attributes = term->default_attributes;
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}
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}
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/* Init delta */
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term->delta = guac_terminal_delta_alloc(width, height);
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/* Clear with background color */
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guac_terminal_clear(term,
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0, 0, term->term_height, term->term_width,
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term->current_attributes.background);
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return term;
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}
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void guac_terminal_free(guac_terminal* term) {
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/* Free scrollback buffer */
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for (int row = 0; row < term->term_height; row++)
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free(term->scrollback[row]);
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free(term->scrollback);
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/* Free delta */
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guac_terminal_delta_free(term->delta);
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}
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/**
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* Returns the location of the given character in the glyph cache layer,
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* sending it first if necessary. The location returned is in characters,
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* and thus must be multiplied by the glyph width to obtain the actual
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* location within the glyph cache layer.
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*/
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int __guac_terminal_get_glyph(guac_terminal* term, char c) {
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guac_socket* socket = term->client->socket;
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int location;
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/* Use foreground color */
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const guac_terminal_color* color =
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&guac_terminal_palette[term->glyph_foreground];
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/* Use background color */
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const guac_terminal_color* background =
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&guac_terminal_palette[term->glyph_background];
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cairo_surface_t* surface;
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cairo_t* cairo;
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PangoLayout* layout;
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/* Return glyph if exists */
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if (term->glyphs[(int) c])
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return term->glyphs[(int) c] - 1;
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location = term->next_glyph++;
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/* Otherwise, draw glyph */
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surface = cairo_image_surface_create(
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CAIRO_FORMAT_ARGB32,
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term->char_width, term->char_height);
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cairo = cairo_create(surface);
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/* Get layout */
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layout = pango_cairo_create_layout(cairo);
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pango_layout_set_font_description(layout, term->font_desc);
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pango_layout_set_text(layout, &c, 1);
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/* Draw */
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cairo_set_source_rgba(cairo,
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color->red / 255.0,
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color->green / 255.0,
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color->blue / 255.0,
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1.0 /* alpha */ );
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cairo_move_to(cairo, 0.0, 0.0);
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pango_cairo_show_layout(cairo, layout);
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/* Free all */
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g_object_unref(layout);
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cairo_destroy(cairo);
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/* Send glyph and update filled flyphs */
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guac_protocol_send_png(socket, GUAC_COMP_OVER, term->glyph_stroke, location * term->char_width, 0, surface);
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guac_protocol_send_rect(socket, term->filled_glyphs,
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location * term->char_width, 0,
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term->char_width, term->char_height);
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guac_protocol_send_cfill(socket, GUAC_COMP_OVER, term->filled_glyphs,
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background->red,
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background->green,
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background->blue,
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0xFF);
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guac_protocol_send_copy(socket, term->glyph_stroke,
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location * term->char_width, 0, term->char_width, term->char_height,
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GUAC_COMP_OVER, term->filled_glyphs, location * term->char_width, 0);
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term->glyphs[(int) c] = location+1;
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cairo_surface_destroy(surface);
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/* Return glyph */
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return location;
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}
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/**
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* Sets the attributes of the glyph cache layer such that future copies from
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* this layer will display as expected.
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*/
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int __guac_terminal_set_colors(guac_terminal* term,
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guac_terminal_attributes* attributes) {
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guac_socket* socket = term->client->socket;
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const guac_terminal_color* background_color;
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int background, foreground;
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/* Handle reverse video */
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if (attributes->reverse) {
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background = attributes->foreground;
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foreground = attributes->background;
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}
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else {
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foreground = attributes->foreground;
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background = attributes->background;
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}
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/* Handle bold */
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if (attributes->bold && foreground <= 7)
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foreground += 8;
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/* Get background color */
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background_color = &guac_terminal_palette[background];
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/* If foreground different from current, colorize */
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if (foreground != term->glyph_foreground) {
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/* Get color */
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const guac_terminal_color* color =
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&guac_terminal_palette[foreground];
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/* Colorize letter */
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guac_protocol_send_rect(socket, term->glyph_stroke,
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0, 0,
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term->char_width * term->next_glyph, term->char_height);
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guac_protocol_send_cfill(socket, GUAC_COMP_ATOP, term->glyph_stroke,
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color->red,
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color->green,
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color->blue,
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255);
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}
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/* If any color change at all, update filled */
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if (foreground != term->glyph_foreground
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|| background != term->glyph_background) {
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/* Set background */
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guac_protocol_send_rect(socket, term->filled_glyphs,
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0, 0,
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term->char_width * term->next_glyph, term->char_height);
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guac_protocol_send_cfill(socket, GUAC_COMP_OVER, term->filled_glyphs,
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background_color->red,
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background_color->green,
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background_color->blue,
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255);
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/* Copy stroke */
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guac_protocol_send_copy(socket, term->glyph_stroke,
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0, 0,
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term->char_width * term->next_glyph, term->char_height,
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GUAC_COMP_OVER, term->filled_glyphs,
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0, 0);
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}
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term->glyph_foreground = foreground;
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term->glyph_background = background;
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return 0;
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}
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/**
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* Sends the given character to the terminal at the given row and column,
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* rendering the charater immediately. This bypasses the guac_terminal_delta
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* mechanism and is intended for flushing of updates only.
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*/
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int __guac_terminal_set(guac_terminal* term, int row, int col, char c) {
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guac_socket* socket = term->client->socket;
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int location = __guac_terminal_get_glyph(term, c);
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return guac_protocol_send_copy(socket,
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term->filled_glyphs,
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location * term->char_width, 0, term->char_width, term->char_height,
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GUAC_COMP_OVER, GUAC_DEFAULT_LAYER,
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term->char_width * col,
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term->char_height * row);
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}
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int guac_terminal_set(guac_terminal* term, int row, int col, char c) {
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/* Build character with current attributes */
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guac_terminal_char guac_char;
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guac_char.value = c;
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guac_char.attributes = term->current_attributes;
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/* Set delta */
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guac_terminal_delta_set(term->delta, row, col, &guac_char);
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return 0;
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}
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int guac_terminal_write(guac_terminal* term, const char* c, int size) {
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while (size > 0) {
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term->char_handler(term, *(c++));
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size--;
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}
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return 0;
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}
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int guac_terminal_copy(guac_terminal* term,
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int src_row, int src_col, int rows, int cols,
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int dst_row, int dst_col) {
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/* Update delta */
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guac_terminal_delta_copy(term->delta,
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dst_row, dst_col,
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src_row, src_col,
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cols, rows);
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return 0;
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}
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int guac_terminal_clear(guac_terminal* term,
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int row, int col, int rows, int cols, int background_color) {
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/* Build space */
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guac_terminal_char character;
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character.value = ' ';
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character.attributes.reverse = false;
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character.attributes.background = background_color;
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/* Fill with color */
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guac_terminal_delta_set_rect(term->delta,
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row, col, cols, rows, &character);
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return 0;
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}
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int guac_terminal_scroll_up(guac_terminal* term,
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int start_row, int end_row, int amount) {
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/* Calculate height of scroll region */
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int height = end_row - start_row + 1;
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return
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/* Move rows within scroll region up by the given amount */
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guac_terminal_copy(term,
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start_row + amount, 0,
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height - amount, term->term_width,
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start_row, 0)
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/* Fill new rows with background */
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|| guac_terminal_clear(term,
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end_row - amount + 1, 0, amount, term->term_width,
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term->current_attributes.background);
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}
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int guac_terminal_scroll_down(guac_terminal* term,
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int start_row, int end_row, int amount) {
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/* Calculate height of scroll region */
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int height = end_row - start_row + 1;
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return
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/* Move rows within scroll region down by the given amount */
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guac_terminal_copy(term,
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start_row, 0,
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height - amount, term->term_width,
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start_row + amount, 0)
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/* Fill new rows with background */
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|| guac_terminal_clear(term,
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start_row, 0, amount, term->term_width,
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term->current_attributes.background);
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}
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int guac_terminal_clear_range(guac_terminal* term,
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int start_row, int start_col,
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int end_row, int end_col, int background_color) {
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/* If not at far left, must clear sub-region to far right */
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if (start_col > 0) {
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/* Clear from start_col to far right */
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if (guac_terminal_clear(term,
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start_row, start_col, 1, term->term_width - start_col,
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background_color))
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return 1;
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/* One less row to clear */
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start_row++;
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}
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/* If not at far right, must clear sub-region to far left */
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if (end_col < term->term_width - 1) {
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/* Clear from far left to end_col */
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if (guac_terminal_clear(term,
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end_row, 0, 1, end_col + 1,
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background_color))
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return 1;
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/* One less row to clear */
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end_row--;
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}
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/* Remaining region now guaranteed rectangular. Clear, if possible */
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if (start_row <= end_row) {
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if (guac_terminal_clear(term,
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start_row, 0, end_row - start_row + 1, term->term_width,
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background_color))
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return 1;
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}
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return 0;
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}
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guac_terminal_delta* guac_terminal_delta_alloc(int width, int height) {
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guac_terminal_operation* current;
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int x, y;
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/* Allocate delta */
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guac_terminal_delta* delta = malloc(sizeof(guac_terminal_delta));
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/* Set width and height */
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delta->width = width;
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delta->height = height;
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/* Alloc operations */
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delta->operations = malloc(width * height *
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sizeof(guac_terminal_operation));
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/* Init each operation buffer row */
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current = delta->operations;
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for (y=0; y<height; y++) {
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/* Init entire row to NOP */
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for (x=0; x<width; x++)
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(current++)->type = GUAC_CHAR_NOP;
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}
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return delta;
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}
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void guac_terminal_delta_free(guac_terminal_delta* delta) {
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/* Free operations buffer */
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free(delta->operations);
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/* Free delta */
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free(delta);
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}
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void guac_terminal_delta_resize(guac_terminal_delta* delta,
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int width, int height) {
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/* STUB */
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}
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void guac_terminal_delta_set(guac_terminal_delta* delta, int r, int c,
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guac_terminal_char* character) {
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/* STUB */
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}
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|
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void guac_terminal_delta_copy(guac_terminal_delta* delta,
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int dst_row, int dst_column,
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|
int src_row, int src_column,
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|
int w, int h) {
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|
/* STUB */
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|
}
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|
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void guac_terminal_delta_set_rect(guac_terminal_delta* delta,
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int row, int column, int w, int h,
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|
guac_terminal_char* character) {
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|
/* STUB */
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|
}
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|
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void guac_terminal_delta_flush(guac_terminal_delta* delta,
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|
guac_terminal* terminal) {
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|
/* STUB */
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}
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