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OpenVMS/Hanzi RTL Chinese Screen Management (SMG$) Manual

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5.2.2 Numeric Capability Fields

Numeric capabilities are those that take a numeric argument, for example, the number of columns on the terminal screen.

The format for a numeric capability field is as follows:


NUMERIC {numeric-capability = value} [,...]

Following are the meanings of the elements:

numeric-capability One of the capability fields listed in Table 5-2
value The value for the specified numeric capability

Table 5-2 lists numeric capabilities.

Table 5-2 Numeric Capabilities
OpenVMS Name Used by SMG Description
COLUMNS Y Specifies the number of columns in a line
CR_FILL N Specifies the number of fill characters needed after a carriage return
LF_FILL N Specifies the number of fill characters needed after a line feed
FRAME N Controls the number of data bits expected by the terminal driver for every character that is input or output (value must be between 5 and 8, inclusive)
NUMBER_FN_KEYS N Specifies the number of function keys available
PRIVATE_NUM_1 to 10 N If set, these fields denote user-defined capabilities 1 through 10
ROWS N Specifies the number of rows on the screen
WIDE_SCREEN_COLUMNS Y Specifies the number of columns available in wide mode

For example, the following TERMTABLE entry describes two characteristics of a VT300-series terminal: 


NAME = "VT300_series"

  NUMERIC

    rows = 24,         columns = 80

5.2.3 String Capability Fields

String capability fields provide several features. They let you do the following:

  • Supply alternate characters for line drawing
  • Provide icons so that your program can display carriage control characters (for example, form feeds) instead of executing them
  • Supply the character sequences that cause a given operation (for example, ERASE_TO_END_OF_LINE) to be performed on any type of terminal
  • Specify the character strings returned by special keys (for example, function keys) on a given terminal
  • Specify strings having a maximum length of 255 characters (the maximum length of a string depends on its complexity, but in no case can it be longer than 255)

Table 5-3 lists string capabilities.

Table 5-3 String Capabilities
Name Used by SMG Description
BEGIN_ALTERNATE_CHAR N Begins alternate character set
BEGIN_AUTOPRINT_MODE N Begins autoprint mode
BEGIN_AUTOREPEAT_MODE N Begins autorepeat mode
BEGIN_AUTOWRAP_MODE N Begins autowrap mode
BEGIN_BLINK Y Begins blinking characters
BEGIN_BOLD Y Begins bolded characters
BEGIN_DELETE_MODE N Begins delete mode
BEGIN_INSERT_MODE N Begins insert mode
BEGIN_LINE_DRAWING_CHAR Y Begins using line-drawing character set
BEGIN_NORMAL_RENDITION Y Begins using normal video attributes
BEGIN_REVERSE Y Begins reverse video characters
BEGIN_UNDERSCORE Y Begins underscored characters
BOTTOM_T_CHAR Y Displays line-drawing character bottom t
CLEAR_TAB N Clears tab at current column
CR_GRAPHIC Y Defines character to indicate a carriage return when control characters are being represented rather than executed
CROSS_CHAR Y Defines character to represent the intersection of perpendicular lines
CURSOR_DOWN N Moves cursor n lines down (does not cause scrolling)
CURSOR_LEFT N Moves cursor n positions to the left
CURSOR_NEXT_LINE N Accepts an argument n and moves the cursor to the first position in the nth following line
CURSOR_POSITION_REPORT N Reports the active position using two arguments
CURSOR_PRECEDING_LINE N Accepts an argument n and moves the cursor to the first position in the nth preceding line
CURSOR_RIGHT N Accepts an argument n and moves the cursor n positions to the right
CURSOR_UP N Accepts an argument n and and moves cursor up n lines (does not cause scrolling)
DARK_SCREEN Y Makes screen background color dark (normal video)
DELETE_CHAR N Accepts an argument n and deletes n characters
DELETE_LINE N Accepts an argument n and deletes n lines
DEVICE_ATTRIBUTES N Terminal's response to a "What are you?" sequence
DOUBLE_HIGH_BOTTOM Y Changes line to double height bottom half
DOUBLE_HIGH_TOP Y Changes line to double height top half
DOUBLE_WIDE Y Changes line to double width
END_ALTERNATE_CHAR N Ends alternate character set
END_AUTOPRINT_MODE N Ends autoprint mode
END_AUTOREPEAT_MODE N Ends autorepeat mode
END_AUTOWRAP_MODE N Ends autowrap mode
END_BLINK N Ends blinking characters
END_BOLD N Ends bolding mode
END_DELETE_MODE N Ends delete mode
END_INSERT_MODE N Ends insert mode
END_LINE_DRAWING_CHAR Y Ends line-drawing characters
END_REVERSE N Ends reverse video characters
END_UNDERSCORE N Ends underscore
ERASE_DISPLAY_TO_CURSOR N Erases display to virtual cursor position
ERASE_LINE_TO_CURSOR N Erases line to virtual cursor position
ERASE_TO_END_DISPLAY N Erases to end of display
ERASE_TO_END_LINE Y Erases to end of line
ERASE_WHOLE_DISPLAY Y Erases whole display
ERASE_WHOLE_LINE N Erases whole line
ERROR_ICON Y Defines character that indicates an error
FF_GRAPHIC Y Uses this character to indicate a form feed when control characters are displayed rather than executed
HOME Y Defines home cursor
HORIZONTAL_BAR Y Displays line-drawing character horizontal bar
HT_GRAPHIC Y Uses this character to indicate a horizontal tab when control characters are displayed rather than executed
INDEX N Moves the cursor down one line without changing the column position (contents of the screen scroll up if necessary)
INIT_STRING Y Defines terminal initialization string
INSERT_CHAR N Accepts an argument n and inserts n characters
INSERT_LINE N Accepts an argument n and inserts n lines
INSERT_PAD N Accepts an argument n and inserts n pad characters after character inserted
KEY_0 Y Returned by keypad 0 in applications mode
KEY_1 Y Returned by keypad 1 in applications mode
KEY_2 Y Returned by keypad 2 in applications mode
KEY_3 Y Returned by keypad 3 in applications mode
KEY_4 Y Returned by keypad 4 in applications mode
KEY_5 Y Returned by keypad 5 in applications mode
KEY_6 Y Returned by keypad 6 in applications mode
KEY_7 Y Returned by keypad 7 in applications mode
KEY_8 Y Returned by keypad 8 in applications mode
KEY_9 Y Returned by keypad 9 in applications mode
KEY_BACKSPACE N Returned by backspace key
KEY_COMMA Y Returned by keypad comma key
KEY_DOWN_ARROW Y Returned by down arrow key
KEY_E1 Y Returned by E1 (editing key 1)
KEY_E2 Y Returned by E2 (editing key 2)
KEY_E3 Y Returned by E3 (editing key 3)
KEY_E4 Y Returned by E4 (editing key 4)
KEY_E5 Y Returned by E5 (editing key 5)
KEY_E6 Y Returned by E6 (editing key 6)
KEY_ENTER (k) Y Returned by keypad enter key
KEY_F1 .
.
. 		Y Returned by F1 (function key 1) .
.
.
KEY_F20 Y Returned by F20 (function key 20)
KEY_LABEL_F1 .
.
. 		N Legend on F1 (function key 1) .
.
.
KEY_LABEL_F20 N Legend on F20 (function key 20)
KEY_LEFT_ARROW Y Returned by left arrow key
KEY_MINUS Y Returned by keypad minus key
KEY_PERIOD Y Returned by keypad period key
KEY_PF1 Y Returned by PF1 key
KEY_PF2 Y Returned by PF2 key
KEY_PF3 Y Returned by PF3 key
KEY_PF4 Y Returned by PF4 key
KEY_RIGHT_ARROW Y Returned by right arrow key
KEY_UP_ARROW Y Returned by up arrow key
LEFT_T_CHAR Y Displays line-drawing character left t
LF_GRAPHIC Y Uses this character to indicate a line feed when control characters are displayed rather than executed
LIGHT_SCREEN Y Makes screen background color light (reverse video)
LOWER_LEFT_CORNER Y Displays line-drawing character lower left corner
LOWER_RIGHT_CORNER Y Displays line-drawing character lower right corner
NAME Y Defines terminal name; must be the first field in the entry
NEWLINE_CHAR N Defines new-line character
NEXT_LINE N Displays next line
NO_PRINTER N Defines no attached printer status
PAD_CHAR N Defines pad character (if other than null)
PRINT_SCREEN N Prints contents of screen
PRINTER_READY N Defines printer ready status
PRINTER_NOT_READY N Defines printer not ready status
PRIVATE_STR_1 .
.
. 		N User-defined capability 1 .
.
.
PRIVATE_STR_10 N User-defined capability 10
REQUEST_CURSOR_POSITION N Requests the active cursor position
REQUEST_PRINTER_STATUS N Requests status of attached printer
RESTORE_CURSOR N Restores cursor to previously saved position
REVERSE_INDEX N Moves the cursor to the same column on the preceding line (contents of the screen scroll down if necessary)
RIGHT_T_CHAR Y Displays line-drawing character right t
SAVE_CURSOR N Saves cursor position
SCROLL_FORWARD N Accepts an argument n and scrolls forward n lines
SCROLL_REVERSE Y Accepts an argument n and scrolls backward n lines
SEL_ERASE_TO_END_DISPLAY N Selectively erases from cursor to end of display (does not change attributes)
SEL_ERASE_TO_END_LINE N Selectively erases from cursor to end of line (does not change attributes)
SEL_ERASE_WHOLE_DISPLAY N Selectively erases entire display (does not change attributes)
SEL_ERASE_WHOLE_LINE N Selectively erases entire line (does not change attributes)
SET_APPLICATION_KEYPAD Y Begins applications keypad mode
SET_CHAR_NOT_SEL_ERASE N Designates all subsequent characters as not selectively erasable
SET_CHAR_SEL_ERASE N Designates all subsequent characters as selectively erasable
SET_CURSOR_ABS Y Directs cursor addressing (accepts row and column arguments)
SET_CURSOR_OFF Y Sets cursor to invisible
SET_CURSOR_ON Y Sets cursor to visible
SET_JUMP_SCROLL Y Sets scrolling to jump scroll
SET_NUMERIC_KEYPAD Y Ends keypad applications mode (resumes numeric mode)
SET_ORIGIN_ABSOLUTE N Allows cursor positioning outside current scrolling region
SET_ORIGIN_RELATIVE N Prohibits cursor positioning outside current scrolling region
SET_PRINTER_OUTPUT N Sends output to printer port rather than screen
SET_SCREEN_OUTPUT N Sends output to terminal screen
SET_SCROLL_REGION Y Sets scrolling region (accepts as arguments top margin and bottom margin)
SET_SMOOTH_SCROLL Y Sets scrolling to smooth scroll
SET_TAB N Sets tab at current column
SINGLE_HIGH Y Changes this line to single height, single width
TAB_CHAR N Defines tab character (other than Ctrl/I or tab with padding); note that this field should be used only for non-ASCII terminals
TOP_T_CHAR Y Displays line-drawing character top t
TRUNCATION_ICON Y Defines the character that indicates overflow characters were truncated
UNDERLINE_CHAR N Underlines a character
UPPER_LEFT_CORNER Y Displays line-drawing character upper left corner
UPPER_RIGHT_CORNER Y Displays line-drawing character upper right corner
VERTICAL_BAR Y Displays line-drawing character vertical bar
VT_GRAPHIC Y Defines the character that indicates a vertical tab when control characters are displayed rather than executed
WIDTH_NARROW Y Sets terminal width to narrow (usually 80 columns)
WIDTH_WIDE Y Sets terminal width to wide (usually 132 columns)

Table 5-4 lists the STRING_2 capabilities. In order to construct one of the user-defined renditions SMG$M_USER1 through SMG$M_USER8, you must provide an appropriate definition in the file TERMTABLE.TXT using STRING_2 capabilities.

Table 5-4 String_2 Capabilities
Name Used by SMG Description
BEGIN_STATUS_LINE Y Begins output to hardware status line
BEGIN_USER1 Y Begins first user-defined attribute
BEGIN_USER2 Y Begins second user-defined attribute
BEGIN_USER3 Y Begins third user-defined attribute
BEGIN_USER4 Y Begins fourth user-defined attribute
BEGIN_USER5 Y Begins fifth user-defined attribute
BEGIN_USER6 Y Begins sixth user-defined attribute
BEGIN_USER7 Y Begins seventh user-defined attribute
BEGIN_USER8 Y Begins eighth user-defined attribute
END_STATUS_LINE Y Ends output to hardware status line
END_USER1 N Ends first user-defined attribute
END_USER2 N Ends second user-defined attribute
END_USER3 N Ends third user-defined attribute
END_USER4 N Ends fourth user-defined attribute
END_USER5 N Ends fifth user-defined attribute
END_USER6 N Ends sixth user-defined attribute
END_USER7 N Ends seventh user-defined attribute
END_USER8 N Ends eighth user-defined attribute
BLACK_SCREEN Y Makes screen background color black
BLUE_SCREEN Y Makes screen background color blue
CYAN_SCREEN Y Makes screen background color cyan (green-blue)
GREEN_SCREEN Y Makes screen background color green
MAGENTA_SCREEN Y Makes screen background color magenta
RED_SCREEN Y Makes screen background color red
WHITE_SCREEN Y Makes screen background color white
YELLOW_SCREEN Y Makes screen background color yellow
USER1_SCREEN Y User-defined background color
USER2_SCREEN Y User-defined background color

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