How to Prevent line masking in the editor

Device, software version:
S60 3rd edition

Detailed description
If the height of the editor cannot meet the height of multi-line text display, the bottom row may only display part of the content, and the row is masked. It is not feasible to dynamically calculate the editor height based on the actual content.
For example, if you insert an image or change the font size, the above method may not work. In this case, we can solve this problem by calling restrictscrolltotopsoflines () (with the efalse parameter added ):

Code:
Ieditor-> textlayout ()-> restrictscrolltotopsoflines (efalse); note:
Be careful when using restrictscrolltotopsoflines (). In some cases, the mouse may appear outside the screen.