+ int const workW = bv->workWidth();
+ int const tmp_top_x = top_x - scx;
+
+ if (tmp_top_x > 0 &&
+ (tmp_top_x + width(bv, font)) < workW)
+ return;
+ if (s > 0 && top_x > 0)
+ return;
+
+ // int mx_scx=abs((width(bv,font) - bv->workWidth())/2);
+ //int const save_scx = scx;
+
+ scx = int(s * workW / 2);
+ // if (!display())
+ // scx += 20;
+
+ if ((tmp_top_x + scx + width(bv, font)) < (workW / 2)) {
+ scx += (workW / 2) - (tmp_top_x + scx + width(bv, font));
+ }
+
+ // bv->updateInset(const_cast<UpdatableInset *>(this), false);
+}
+
+void UpdatableInset::scroll(BufferView * bv, int offset) const
+{
+ if (offset > 0) {
+ if (!scx && top_x >= 20)
+ return;
+ if ((top_x + offset) > 20)
+ scx = 0;
+ // scx += offset - (top_x - scx + offset - 20);
+ else
+ scx += offset;
+ } else {
+ LyXFont const font;
+ if (!scx && (top_x + width(bv, font)) < (bv->workWidth() - 20))
+ return;
+ if ((top_x - scx + offset + width(bv, font)) < (bv->workWidth() - 20)) {
+ scx = bv->workWidth() - width(bv, font) - top_x + scx - 20;
+ } else {
+ scx += offset;
+ }
+ }
+// bv->updateInset(const_cast<UpdatableInset *>(this), false);