// Move cursor to the 'boffset' position in the 'line'. Obviously 'line' must be
// from the attached buffer. If 'boffset' < 0, use 'last_cursor_voffset'. Keep
// in mind that there is no need to maintain connections between lines (e.g. for
// moving from a deleted line to another line).
func (v *View) MoveCursorTo(c buffer.Cursor) {
v.dirty |= dirtyStatus
if c.Boffset < 0 {
bo, co, vo := c.Line.FindClosestOffsets(v.lastCursorVoffset)
v.cursor.Boffset = bo
v.cursorCoffset = co
v.cursorVoffset = vo
} else {
vo, co := c.VoffsetCoffset()
v.cursor.Boffset = c.Boffset
v.cursorCoffset = co
v.cursorVoffset = vo
}
if c.Boffset >= 0 {
v.lastCursorVoffset = v.cursorVoffset
}
if c.Line != v.cursor.Line {
if v.lineVoffset != 0 {
v.dirty = dirtyEverything
}
v.lineVoffset = 0
}
v.cursor.Line = c.Line
v.cursor.LineNum = c.LineNum
v.adjustLineVoffset()
v.adjustTopLine()
if v.selection.Type != SelectionNone {
v.dirty |= dirtyContents
v.selection.End = v.Cursor()
}
}
func (v *view) cursorPositionFor(cursor buffer.Cursor) (int, int) {
y := cursor.LineNum - v.topLineNum
vo, _ := cursor.VoffsetCoffset()
x := vo - v.lineVoffset
return x, y
}