506 lines
12 KiB
C
506 lines
12 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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*
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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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#ifndef _SSH_GUAC_TERMINAL_H
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#define _SSH_GUAC_TERMINAL_H
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#include <stdbool.h>
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#include <pango/pangocairo.h>
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#include <guacamole/client.h>
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typedef struct guac_terminal guac_terminal;
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/**
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* Handler for characters printed to the terminal. When a character is printed,
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* the current char handler for the terminal is called and given that
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* character.
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*/
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typedef int guac_terminal_char_handler(guac_terminal* term, char c);
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/**
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* An RGB color, where each component ranges from 0 to 255.
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*/
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typedef struct guac_terminal_color {
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/**
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* The red component of this color.
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*/
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int red;
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/**
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* The green component of this color.
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*/
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int green;
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/**
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* The blue component of this color.
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*/
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int blue;
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} guac_terminal_color;
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/**
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* Terminal attributes, as can be applied to a single character.
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*/
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typedef struct guac_terminal_attributes {
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/**
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* Whether the character should be rendered bold.
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*/
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bool bold;
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/**
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* Whether the character should be rendered with reversed colors
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* (background becomes foreground and vice-versa).
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*/
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bool reverse;
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/**
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* Whether to render the character with underscore.
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*/
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bool underscore;
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/**
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* The foreground color of this character, as a palette index.
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*/
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int foreground;
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/**
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* The background color of this character, as a palette index.
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*/
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int background;
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} guac_terminal_attributes;
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/**
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* The available color palette. All integer colors within structures
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* here are indices into this palette.
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*/
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extern const guac_terminal_color guac_terminal_palette[16];
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/**
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* Represents a single character for display in a terminal, including actual
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* character value, foreground color, and background color.
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*/
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typedef struct guac_terminal_char {
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/**
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* The character value of the character to display.
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*/
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char value;
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/**
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* The attributes of the character to display.
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*/
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guac_terminal_attributes attributes;
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} guac_terminal_char;
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/**
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* All available terminal operations which affect character cells.
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*/
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typedef enum guac_terminal_operation_type {
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/**
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* Operation which does nothing.
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*/
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GUAC_CHAR_NOP,
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/**
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* Operation which copies a character from a given row/column coordinate.
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*/
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GUAC_CHAR_COPY,
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/**
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* Operation which sets the character and attributes.
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*/
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GUAC_CHAR_SET
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} guac_terminal_operation_type;
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/**
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* A pairing of a guac_terminal_operation_type and all parameters required by
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* that operation type.
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*/
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typedef struct guac_terminal_operation {
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/**
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* The type of operation to perform.
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*/
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guac_terminal_operation_type type;
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/**
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* The character (and attributes) to set the current location to. This is
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* only applicable to GUAC_CHAR_SET.
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*/
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guac_terminal_char character;
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/**
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* The row to copy a character from. This is only applicable to
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* GUAC_CHAR_COPY.
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*/
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int row;
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/**
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* The column to copy a character from. This is only applicable to
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* GUAC_CHAR_COPY.
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*/
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int column;
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} guac_terminal_operation;
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/**
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* Set of all pending operations for the currently-visible screen area.
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*/
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typedef struct guac_terminal_delta {
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/**
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* Array of all operations pending for the visible screen area.
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*/
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guac_terminal_operation* operations;
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/**
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* The width of the screen, in characters.
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*/
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int width;
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/**
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* The height of the screen, in characters.
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*/
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int height;
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} guac_terminal_delta;
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/**
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* Dynamically-resizable character buffer.
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*/
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typedef struct guac_terminal_buffer {
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/**
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* Array of characters.
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*/
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guac_terminal_char* characters;
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/**
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* The width of this buffer in characters.
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*/
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int width;
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/**
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* The height of this buffer in characters.
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*/
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int height;
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} guac_terminal_buffer;
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/**
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* Represents a terminal emulator which uses a given Guacamole client to
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* render itself.
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*/
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struct guac_terminal {
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/**
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* The Guacamole client this terminal emulator will use for rendering.
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*/
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guac_client* client;
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/**
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* The description of the font to use for rendering.
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*/
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PangoFontDescription* font_desc;
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/**
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* Index of next glyph to create
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*/
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int next_glyph;
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/**
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* Index of locations for each glyph in the stroke and fill layers.
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*/
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int glyphs[256];
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/**
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* Color of glyphs in copy buffer
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*/
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int glyph_foreground;
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/**
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* Color of glyphs in copy buffer
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*/
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int glyph_background;
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/**
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* A single wide layer holding each glyph, with each glyph only
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* colored with foreground color (background remains transparent).
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*/
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guac_layer* glyph_stroke;
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/**
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* A single wide layer holding each glyph, with each glyph properly
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* colored with foreground and background color (no transparency at all).
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*/
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guac_layer* filled_glyphs;
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/**
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* Array of scrollback buffer rows, where each row is an array of
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* characters.
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*/
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guac_terminal_char** scrollback;
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/**
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* The width of each character, in pixels.
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*/
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int char_width;
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/**
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* The height of each character, in pixels.
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*/
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int char_height;
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/**
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* The width of the terminal, in characters.
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*/
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int term_width;
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/**
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* The height of the terminal, in characters.
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*/
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int term_height;
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/**
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* The index of the first row in the scrolling region.
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*/
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int scroll_start;
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/**
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* The index of the last row in the scrolling region.
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*/
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int scroll_end;
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/**
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* The current row location of the cursor.
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*/
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int cursor_row;
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/**
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* The current column location of the cursor.
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*/
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int cursor_col;
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/**
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* The attributes which will be applied to future characters.
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*/
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guac_terminal_attributes current_attributes;
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/**
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* The attributes which will be applied to characters by default, unless
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* other attributes are explicitly specified.
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*/
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guac_terminal_attributes default_attributes;
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/**
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* Handler which will receive all printed characters, updating the terminal
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* accordingly.
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*/
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guac_terminal_char_handler* char_handler;
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/**
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* The difference between the currently-rendered screen and the current
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* state of the terminal.
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*/
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guac_terminal_delta* delta;
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/**
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* Current terminal display state. All characters present on the screen
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* are within this buffer. This has nothing to do with the delta, which
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* facilitates transfer of a set of changes to the remote display.
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*/
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guac_terminal_buffer* buffer;
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};
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/**
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* Creates a new guac_terminal, having the given width and height, and
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* rendering to the given client.
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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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/**
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* Frees all resources associated with the given terminal.
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*/
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void guac_terminal_free(guac_terminal* term);
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/**
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* Writes the given string of characters to the terminal.
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*/
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int guac_terminal_write(guac_terminal* term, const char* c, int size);
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/**
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* Sets the character at the given row and column to the specified value.
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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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/**
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* Copies a rectangular region of characters which may overlap with the
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* destination.
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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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/**
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* Clears a rectangular region of characters, replacing them with the
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* current background color and attributes.
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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);
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/**
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* Clears the given region from right-to-left, top-to-bottom, replacing
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* all characters with the current background color and attributes.
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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);
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/**
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* Scrolls the terminal's current scroll region up by one row.
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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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/**
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* Scrolls the terminal's current scroll region down by one row.
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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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/**
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* Toggles the reverse attribute of the character at the given location.
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*/
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int guac_terminal_toggle_reverse(guac_terminal* term, int row, int col);
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/**
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* Allocates a new guac_terminal_delta.
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*/
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guac_terminal_delta* guac_terminal_delta_alloc(int width, int height);
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/**
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* Frees the given guac_terminal_delta.
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*/
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void guac_terminal_delta_free(guac_terminal_delta* delta);
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/**
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* Resizes the given guac_terminal_delta to the given dimensions.
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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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/**
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* Stores a set operation at the given location.
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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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/**
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* Stores a rectangle of copy operations, copying existing operations as
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* necessary.
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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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/**
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* Sets a rectangle of character data to the given character value.
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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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/**
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* Flushes all pending operations within the given guac_client_delta to the
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* given guac_terminal.
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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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/**
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* Allocates a new character buffer having the given dimensions.
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*/
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guac_terminal_buffer* guac_terminal_buffer_alloc(int width, int height);
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/**
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* Resizes the given character buffer to the given dimensions.
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*/
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void guac_terminal_buffer_resize(guac_terminal_buffer* buffer,
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int width, int height);
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/**
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* Sets the character at the given location within the buffer to the given
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* value.
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*/
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void guac_terminal_buffer_set(guac_terminal_buffer* buffer, int r, int c,
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guac_terminal_char* character);
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/**
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* Copies a rectangle of character data within the buffer. The source and
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* destination may overlap.
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*/
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void guac_terminal_buffer_copy(guac_terminal_buffer* buffer,
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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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/**
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* Sets a rectangle of character data to the given character value.
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*/
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void guac_terminal_buffer_set_rect(guac_terminal_buffer* buffer,
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int row, int column, int w, int h,
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guac_terminal_char* character);
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/**
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* Frees the given character buffer.
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*/
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void guac_terminal_buffer_free(guac_terminal_buffer* buffer);
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#endif
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