6 \section intro Introduction
7 SDL_Console is a console that can be added to any SDL application. It is similar to Quake and other games consoles.
8 A console is meant to be a very simple way of interacting with a program and executing commands. You can also have
9 more than one console at a time.
11 \section docs Documentation
12 For a detailed description of all functions see \ref CON_console.h. Remark that functions that have the mark "Internal"
13 are only used internally. There's not much use of calling these functions.
17 \author Garett Banuk <mongoose@mongeese.org> (Original Version)
18 \author Clemens Wacha <reflex-2000@gmx.net> (Version 2.x, Documentation)
19 \author Boris Lesner <talanthyr@tuxfamily.org> (Package Maintainer)
20 \author Bradley Bell <btb@icculus.org> (Descent Version)
27 //! Cut the buffer line if it becomes longer than this
28 #define CON_CHARS_PER_LINE 128
29 //! Cursor blink frequency in ms
30 #define CON_BLINK_RATE 500
31 //! Border in pixels from the most left to the first letter
32 #define CON_CHAR_BORDER 4
33 //! Spacing in pixels between lines
34 #define CON_LINE_SPACE 1
35 //! Default prompt used at the commandline
36 #define CON_DEFAULT_PROMPT "]"
37 //! Scroll this many lines at a time (when pressing PGUP or PGDOWN)
38 #define CON_LINE_SCROLL 2
39 //! Indicator showing that you scrolled up the history
40 #define CON_SCROLL_INDICATOR "^"
41 //! Cursor shown if we are in insert mode
42 #define CON_INS_CURSOR "_"
43 //! Cursor shown if we are in overwrite mode
44 #define CON_OVR_CURSOR "|"
45 //! Defines the default hide key (Hide() the console if pressed)
46 #define CON_DEFAULT_HIDEKEY KEY_ESC
47 //! Defines the opening/closing speed
48 #define CON_OPENCLOSE_SPEED 25
55 CON_CLOSED, //! The console is closed (and not shown)
56 CON_CLOSING, //! The console is still open and visible but closing
57 CON_OPENING, //! The console is visible and opening but not yet fully open
58 CON_OPEN //! The console is open and visible
61 /*! This is a struct for each consoles data */
62 typedef struct console_information_td {
63 int Visible; //! enum that tells which visible state we are in CON_HIDE, CON_SHOW, CON_RAISE, CON_LOWER
64 int RaiseOffset; //! Offset used when scrolling in the console
65 int HideKey; //! the key that can hide the console
66 char **ConsoleLines; //! List of all the past lines
67 char **CommandLines; //! List of all the past commands
68 int TotalConsoleLines; //! Total number of lines in the console
69 int ConsoleScrollBack; //! How much the user scrolled back in the console
70 int TotalCommands; //! Number of commands in the Back Commands
71 int LineBuffer; //! The number of visible lines in the console (autocalculated)
72 int VChars; //! The number of visible characters in one console line (autocalculated)
73 char* Prompt; //! Prompt displayed in command line
74 char Command[CON_CHARS_PER_LINE]; //! current command in command line = lcommand + rcommand
75 char RCommand[CON_CHARS_PER_LINE]; //! left hand side of cursor
76 char LCommand[CON_CHARS_PER_LINE]; //! right hand side of cursor
77 char VCommand[CON_CHARS_PER_LINE]; //! current visible command line
78 int CursorPos; //! Current cursor position in CurrentCommand
79 int Offset; //! CommandOffset (first visible char of command) - if command is too long to fit into console
80 int InsMode; //! Insert or Overwrite characters?
81 grs_canvas *ConsoleSurface; //! Canvas of the console
82 grs_screen *OutputScreen; //! This is the screen to draw the console to
83 grs_bitmap *BackgroundImage; //! Background image for the console
84 grs_bitmap *InputBackground; //! Dirty rectangle to draw over behind the users background
85 int DispX, DispY; //! The top left x and y coords of the console on the display screen
87 unsigned char ConsoleAlpha; //! The consoles alpha level
89 int CommandScrollBack; //! How much the users scrolled back in the command lines
90 void(*CmdFunction)(struct console_information_td *console, char* command); //! The Function that is executed if you press <Return> in the console
91 char*(*TabFunction)(char* command); //! The Function that is executed if you press <Tab> in the console
95 /*! Takes keys from the keyboard and inputs them to the console if the console isVisible().
96 If the event was not handled (i.e. WM events or unknown ctrl- or alt-sequences)
97 the function returns the event for further processing. */
98 int CON_Events(int event);
99 /*! Makes the console visible */
100 void CON_Show(ConsoleInformation *console);
101 /*! Hides the console */
102 void CON_Hide(ConsoleInformation *console);
103 /*! Returns 1 if the console is visible, 0 else */
104 int CON_isVisible(ConsoleInformation *console);
105 /*! Internal: Updates visible state. Used in CON_DrawConsole() */
106 void CON_UpdateOffset(ConsoleInformation* console);
107 /*! Draws the console to the screen if it isVisible()*/
108 void CON_DrawConsole(ConsoleInformation *console);
109 /*! Initializes a new console */
110 ConsoleInformation *CON_Init(grs_font *Font, grs_screen *DisplayScreen, int lines, int x, int y, int w, int h);
111 /*! Calls CON_Free */
112 void CON_Destroy(ConsoleInformation *console);
113 /*! Frees all the memory loaded by the console */
114 void CON_Free(ConsoleInformation *console);
115 /*! printf for the console */
116 void CON_Out(ConsoleInformation *console, const char *str, ...);
118 /*! Sets the alpha channel of an SDL_Surface to the specified value (0 - transparend,
119 255 - opaque). Use this function also for OpenGL. */
120 void CON_Alpha(ConsoleInformation *console, unsigned char alpha);
121 /*! Internal: Sets the alpha channel of an SDL_Surface to the specified value.
122 Preconditions: the surface in question is RGBA. 0 <= a <= 255, where 0 is transparent and 255 opaque */
123 void CON_AlphaGL(SDL_Surface *s, int alpha);
124 /*! Sets a background image for the console */
126 int CON_Background(ConsoleInformation *console, grs_bitmap *image);
127 /*! Sets font info for the console */
128 void CON_Font(ConsoleInformation *console, grs_font *font, int fg, int bg);
129 /*! Changes current position of the console */
130 void CON_Position(ConsoleInformation *console, int x, int y);
131 /*! Changes the size of the console */
132 int CON_Resize(ConsoleInformation *console, int x, int y, int w, int h);
133 /*! Beams a console to another screen surface. Needed if you want to make a Video restart in your program. This
134 function first changes the OutputScreen Pointer then calls CON_Resize to adjust the new size. */
135 int CON_Transfer(ConsoleInformation* console, grs_screen* new_outputscreen, int x, int y, int w, int h);
136 /*! Give focus to a console. Make it the "topmost" console. This console will receive events
137 sent with CON_Events() */
138 void CON_Topmost(ConsoleInformation *console);
139 /*! Modify the prompt of the console */
140 void CON_SetPrompt(ConsoleInformation *console, char* newprompt);
141 /*! Set the key, that invokes a CON_Hide() after press. default is ESCAPE and you can always hide using
142 ESCAPE and the HideKey. compared against event->key.keysym.sym !! */
143 void CON_SetHideKey(ConsoleInformation *console, int key);
144 /*! Internal: executes the command typed in at the console (called if you press ENTER)*/
145 void CON_Execute(ConsoleInformation *console, char* command);
146 /*! Sets the callback function that is called if a command was typed in. The function could look like this:
147 void my_command_handler(ConsoleInformation* console, char* command). @param console: the console the command
148 came from. @param command: the command string that was typed in. */
149 void CON_SetExecuteFunction(ConsoleInformation *console, void(*CmdFunction)(ConsoleInformation *console2, char* command));
150 /*! Sets the callback tabulator completion function. char* my_tabcompletion(char* command). If Tab is
151 pressed, the function gets called with the already typed in command. my_tabcompletion then checks if if can
152 complete the command or if it should display a list of all matching commands (with CON_Out()). Returns the
153 completed command or NULL if no completion was made. */
154 void CON_SetTabCompletion(ConsoleInformation *console, char*(*TabFunction)(char* command));
155 /*! Internal: Gets called when TAB was pressed */
156 void CON_TabCompletion(ConsoleInformation *console);
157 /*! Internal: makes newline (same as printf("\n") or CON_Out(console, "\n") ) */
158 void CON_NewLineConsole(ConsoleInformation *console);
159 /*! Internal: shift command history (the one you can switch with the up/down keys) */
160 void CON_NewLineCommand(ConsoleInformation *console);
161 /*! Internal: updates console after resize etc. */
162 void CON_UpdateConsole(ConsoleInformation *console);
165 /*! Internal: Default Execute callback */
166 void Default_CmdFunction(ConsoleInformation *console, char* command);
167 /*! Internal: Default TabCompletion callback */
168 char* Default_TabFunction(char* command);
170 /*! Internal: draws the commandline the user is typing in to the screen. called by update? */
171 void DrawCommandLine();
173 /*! Internal: Gets called if you press the LEFT key (move cursor left) */
174 void Cursor_Left(ConsoleInformation *console);
175 /*! Internal: Gets called if you press the RIGHT key (move cursor right) */
176 void Cursor_Right(ConsoleInformation *console);
177 /*! Internal: Gets called if you press the HOME key (move cursor to the beginning
179 void Cursor_Home(ConsoleInformation *console);
180 /*! Internal: Gets called if you press the END key (move cursor to the end of the line*/
181 void Cursor_End(ConsoleInformation *console);
182 /*! Internal: Called if you press DELETE (deletes character under the cursor) */
183 void Cursor_Del(ConsoleInformation *console);
184 /*! Internal: Called if you press BACKSPACE (deletes character left of cursor) */
185 void Cursor_BSpace(ConsoleInformation *console);
186 /*! Internal: Called if you type in a character (add the char to the command) */
187 void Cursor_Add(ConsoleInformation *console, int event);
189 /*! Internal: Called if you press Ctrl-C (deletes the commandline) */
190 void Clear_Command(ConsoleInformation *console);
191 /*! Internal: Called if you press Ctrl-L (deletes the History) */
192 void Clear_History(ConsoleInformation *console);
194 /*! Internal: Called if you press UP key (switches through recent typed in commands */
195 void Command_Up(ConsoleInformation *console);
196 /*! Internal: Called if you press DOWN key (switches through recent typed in commands */
197 void Command_Down(ConsoleInformation *console);