func (l TextSelectionList) Transform(transform SelectionTransform) TextSelectionList {
res := TextSelectionList{}
for _, s := range l {
interval.Merge(&res, transform(s))
}
return res
}
func (t *TextBoxController) updateSelectionsForEdits(edits []TextBoxEdit) {
min := 0
max := len(t.text)
selections := TextSelectionList{}
for _, selection := range t.selections {
for _, e := range edits {
start := e.At
if e.Delta < 0 {
start -= e.Delta
}
delta := e.Delta
if selection.start >= start {
selection.start += delta
}
if selection.end >= start {
selection.end += delta
}
}
if selection.end < selection.start {
selection.end = selection.start
}
selection.start = math.Clamp(selection.start, min, max)
selection.end = math.Clamp(selection.end, min, max)
selection = selection.Store()
interval.Merge(&selections, selection)
}
t.selections = selections
}
func (t *TextBoxController) AddCarets(transform SelectionTransform) {
t.storeCaretLocationsNextEdit = true
up := t.selections.Transform(transform)
for _, s := range up {
interval.Merge(&t.selections, s)
}
t.onSelectionChanged.Fire()
}
func TestTextSelectionMergeExtendEnd(t *testing.T) {
s1 := CreateTextSelection(6, 9, true)
s2 := CreateTextSelection(8, 15, false)
l := TextSelectionList{s1}
interval.Merge(&l, s2)
test.AssertEquals(t, TextSelectionList{
CreateTextSelection(6, 15, false),
}, l)
}
func TestTextSelectionMergeDuplicate0Len(t *testing.T) {
s1 := CreateTextSelection(2, 2, false)
s2 := CreateTextSelection(2, 2, true)
l := TextSelectionList{s1}
interval.Merge(&l, s2)
test.AssertEquals(t, TextSelectionList{
CreateTextSelection(2, 2, true),
}, l)
}
func TestTextSelectionMergeEncompass(t *testing.T) {
s1 := CreateTextSelection(6, 9, false)
s2 := CreateTextSelection(5, 10, true)
l := TextSelectionList{s1}
interval.Merge(&l, s2)
test.AssertEquals(t, TextSelectionList{
CreateTextSelection(5, 10, true),
}, l)
}
func TestTextSelectionMergeBeforeStart(t *testing.T) {
s1 := CreateTextSelection(6, 9, true)
s2 := CreateTextSelection(2, 6, false)
l := TextSelectionList{s1}
interval.Merge(&l, s2)
test.AssertEquals(t, TextSelectionList{
CreateTextSelection(2, 6, false),
CreateTextSelection(6, 9, true),
}, l)
}
func (l TextSelectionList) TransformCarets(transform SelectionTransform) TextSelectionList {
res := TextSelectionList{}
for _, s := range l {
moved := transform(s)
if s.caretAtStart {
s.start = moved.start
s.storedStart = moved.storedStart
} else {
s.end = moved.end
s.storedEnd = moved.storedEnd
}
if s.start > s.end {
s.start, s.end = s.end, s.start
s.caretAtStart = !s.caretAtStart
}
interval.Merge(&res, s)
}
return res
}
func TestTextSelectionMergeOne(t *testing.T) {
s := CreateTextSelection(5, 10, true)
l := TextSelectionList{}
interval.Merge(&l, s)
test.AssertEquals(t, TextSelectionList{s}, l)
}
func (t *TextBoxController) AddSelection(s TextSelection) {
t.storeCaretLocationsNextEdit = true
interval.Merge(&t.selections, s)
t.onSelectionChanged.Fire()
}