ICH top-level constant

String const ICH

Insert Character.

Representation: CSI n \x40

Parameter default value: n = 1

If the DEVICE COMPONENT SELECT MODE (DCSM) is set to PRESENTATION, ICH is used to prepare the insertion of n characters, by putting into the erased state the active presentation position and, depending on the setting of the CHARACTER EDITING MODE (HEM), the n-1 preceding or following character positions in the presentation component. The previous contents of the active presentation position and an adjacent string of character positions are shifted away from the active presentation position. The contents of n character positions at the other end of the shifted part are removed. The active presentation position is moved to the line home position in the active line. The line home position is established by the parameter value of SET LINE HOME (SLH).

The extent of the shifted part is established by SELECT EDITING EXTENT (SEE).

The effect of ICH on the start or end of a selected area, the start or end of a qualified area, or a tabulation stop in the shifted part, is not defined by Standard.

If the DEVICE COMPONENT SELECT MODE (DCSM) is set to DATA, ICH is used to prepare the insertion of n characters, by putting into the erased state the active data position and, depending on the setting of the CHARACTER EDITING MODE (HEM), the n-1 preceding or following character positions in the data component. The previous contents of the active data position and an adjacent string of character positions are shifted away from the active data position. The contents of n character positions at the other end of the shifted part are removed. The active data position is moved to the line home position in the active line. The line home position is established by the parameter value of SET LINE HOME (SLH).

Implementation

const String ICH = '@';