guacamole-spice-protocol/protocols/ssh/include/display.h

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/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is libguac-client-ssh.
*
* The Initial Developer of the Original Code is
* Michael Jumper.
* Portions created by the Initial Developer are Copyright (C) 2011
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
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#ifndef _SSH_GUAC_DISPLAY_H
#define _SSH_GUAC_DISPLAY_H
#include <pango/pangocairo.h>
#include <guacamole/client.h>
#include "types.h"
/**
* The available color palette. All integer colors within structures
* here are indices into this palette.
*/
extern const guac_terminal_color guac_terminal_palette[16];
/**
* All available terminal operations which affect character cells.
*/
typedef enum guac_terminal_operation_type {
/**
* Operation which does nothing.
*/
GUAC_CHAR_NOP,
/**
* Operation which copies a character from a given row/column coordinate.
*/
GUAC_CHAR_COPY,
/**
* Operation which sets the character and attributes.
*/
GUAC_CHAR_SET
} guac_terminal_operation_type;
/**
* A pairing of a guac_terminal_operation_type and all parameters required by
* that operation type.
*/
typedef struct guac_terminal_operation {
/**
* The type of operation to perform.
*/
guac_terminal_operation_type type;
/**
* The character (and attributes) to set the current location to. This is
* only applicable to GUAC_CHAR_SET.
*/
guac_terminal_char character;
/**
* The row to copy a character from. This is only applicable to
* GUAC_CHAR_COPY.
*/
int row;
/**
* The column to copy a character from. This is only applicable to
* GUAC_CHAR_COPY.
*/
int column;
} guac_terminal_operation;
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/**
* A cached glyph.
*/
typedef struct guac_terminal_glyph {
/**
* The location within the glyph layer that this glyph can be found.
*/
int location;
/**
* The codepoint currently stored at that location.
*/
int codepoint;
} guac_terminal_glyph;
/**
* Set of all pending operations for the currently-visible screen area.
*/
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typedef struct guac_terminal_display {
/**
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* The Guacamole client this display will use for rendering.
*/
guac_client* client;
/**
* Array of all operations pending for the visible screen area.
*/
guac_terminal_operation* operations;
/**
* The width of the screen, in characters.
*/
int width;
/**
* The height of the screen, in characters.
*/
int height;
/**
* The description of the font to use for rendering.
*/
PangoFontDescription* font_desc;
/**
* The width of each character, in pixels.
*/
int char_width;
/**
* The height of each character, in pixels.
*/
int char_height;
/**
* Index of next glyph to create
*/
int next_glyph;
/**
* Index of locations for each glyph in the stroke and fill layers.
*/
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guac_terminal_glyph glyphs[512];
/**
* Color of glyphs in copy buffer
*/
int glyph_foreground;
/**
* Color of glyphs in copy buffer
*/
int glyph_background;
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/**
* Layer above default layer which highlights selected text.
*/
guac_layer* select_layer;
/**
* A single wide layer holding each glyph, with each glyph only
* colored with foreground color (background remains transparent).
*/
guac_layer* glyph_stroke;
/**
* A single wide layer holding each glyph, with each glyph properly
* colored with foreground and background color (no transparency at all).
*/
guac_layer* filled_glyphs;
/**
* Whether text is being selected.
*/
bool text_selected;
/**
* Whether the selection is finished, and will no longer be modified. A
* committed selection remains highlighted for reference, but the
* highlight will be removed when the display changes.
*/
bool selection_committed;
/**
* The row that the selection starts at.
*/
int selection_start_row;
/**
* The column that the selection starts at.
*/
int selection_start_column;
/**
* The row that the selection ends at.
*/
int selection_end_row;
/**
* The column that the selection ends at.
*/
int selection_end_column;
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} guac_terminal_display;
/**
* Allocates a new display having the given default foreground and background
* colors.
*/
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guac_terminal_display* guac_terminal_display_alloc(guac_client* client,
const char* font_name, int font_size,
int foreground, int background);
/**
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* Frees the given display.
*/
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void guac_terminal_display_free(guac_terminal_display* display);
/**
* Copies the given range of columns to a new location, offset from
* the original by the given number of columns.
*/
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void guac_terminal_display_copy_columns(guac_terminal_display* display, int row,
int start_column, int end_column, int offset);
/**
* Copies the given range of rows to a new location, offset from the
* original by the given number of rows.
*/
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void guac_terminal_display_copy_rows(guac_terminal_display* display,
int start_row, int end_row, int offset);
/**
* Sets the given range of columns within the given row to the given
* character.
*/
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void guac_terminal_display_set_columns(guac_terminal_display* display, int row,
int start_column, int end_column, guac_terminal_char* character);
/**
* Resize the terminal to the given dimensions.
*/
void guac_terminal_display_resize(guac_terminal_display* display, int width, int height);
/**
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* Flushes all pending operations within the given guac_terminal_display.
*/
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void guac_terminal_display_flush(guac_terminal_display* display);
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/**
* Draws the text selection rectangle from the given coordinates to the given end coordinates.
*/
void guac_terminal_display_select(guac_terminal_display* display,
int start_row, int start_col, int end_row, int end_col);
/**
* Commits the select rectangle, allowing the display to clear it when
* necessary.
*/
void guac_terminal_display_commit_select(guac_terminal_display* display);
#endif