Twice Mikra and Once Targum and Rashi on Shabbat during the Seven Days of Mourning

Is it permissible to study Twice Mikra with Rashi on Shabbat during the seven days of mourning?

One who is accustomed to doing so every Shabbat throughout the year may be lenient in this matter.

Written in Birkei Yosef, Yoreh De'ah, Siman ת, סעיף ד: "But to review the parsha, etc. It seems clear that this applies only to ShMOT, and not Rashi, even if he is accustomed to studying ShMOT and Rashi every week, nevertheless, since it is not a general obligation like the translation, he should not read Rashi on Shabbat during the days of mourning, contrary to what is written otherwise." However, in Aruch HaShulchan, Yoreh De'ah, Siman ת, סעיף ו and סעיף ז, and I have also seen from one of the greats that one who is accustomed to studying 18 chapters of Mishnah every day may study them also on Shabbat during the days of mourning [K"N Bra"SH Siman ע"ה אות נ"ז]. And according to this, if he has a fixed lesson to study Gemara and Poskim, he may also study on that Shabbat, and if he is accustomed to studying the order of the parsha with Rashi every Shabbat, he may also study [and so it is written in Ba"T סק"ב in the name of Le"P]:" And there it is written that this is also in conjunction with those who hold that on Shabbat there is no prohibition to study Torah that he cannot study in permitted matters due to the delight of Shabbat.