func (t *TextBox) DoubleClick(ev gxui.MouseEvent) (consume bool) {
if p, ok := t.RuneIndexAt(ev.Point); ok {
s, e := t.controller.WordAt(p)
if ev.Modifier&gxui.ModControl != 0 {
t.controller.AddSelection(gxui.CreateTextSelection(s, e, false))
} else {
t.controller.SetSelection(gxui.CreateTextSelection(s, e, false))
}
}
t.InputEventHandler.DoubleClick(ev)
return true
}
func (u *Undo) Exec(target interface{}) (executed, consume bool) {
finder, ok := target.(EditorFinder)
if !ok {
return false, false
}
editor := finder.CurrentEditor()
if editor == nil {
u.err = "undo: no file open"
return true, true
}
history := editor.History()
edit, ok := history.Undo()
if !ok {
u.warn = "undo: nothing to undo"
return true, true
}
text, _ := editor.Controller().ReplaceAt(editor.Runes(), edit.At, edit.At+len(edit.New), edit.Old)
editor.Controller().SetTextRunes(text)
absDelta := edit.Delta
if absDelta < 0 {
absDelta = -absDelta
}
editor.Controller().SetSelection(gxui.CreateTextSelection(edit.At, edit.At+absDelta, true))
editor.ScrollToRune(edit.At)
return true, true
}
func (l *CodeEditorLine) PaintEditorSelections(c gxui.Canvas, info CodeEditorLinePaintInfo) {
controller := l.textbox.controller
ls, le := uint64(controller.LineStart(l.lineIndex)), uint64(controller.LineEnd(l.lineIndex))
selections := controller.Selections()
if l.textbox.selectionDragging {
interval.Replace(&selections, l.textbox.selectionDrag)
}
interval.Visit(&selections, gxui.CreateTextSelection(int(ls), int(le), false), func(s, e uint64, _ int) {
if s < e {
var startOffset math.Point
if s > ls {
startOffset = l.endOfChar(info.GlyphOffsets[s-ls-1])
}
var endOffset math.Point
if e > ls {
endOffset = l.endOfChar(info.GlyphOffsets[e-ls-1])
}
width := endOffset.X - startOffset.X
m := l.outer.MeasureRunes(int(s), int(e))
m.W = width
top := math.Point{X: l.caretWidth + startOffset.X, Y: 0}
bottom := top.Add(m.Point())
l.outer.PaintSelection(c, top, bottom)
}
})
}
func (f *Find) Start(control gxui.Control) gxui.Control {
f.editor = findEditor(control)
if f.editor == nil {
return nil
}
f.display = f.theme.CreateLabel()
f.display.SetText("Start typing to search")
f.pattern = newFindBox(f.driver, f.theme, f.editor)
f.next = f.pattern
f.pattern.OnTextChanged(func([]gxui.TextBoxEdit) {
f.editor.Controller().ClearSelections()
needle := f.pattern.Text()
if len(needle) == 0 {
f.display.SetText("Start typing to search")
return
}
haystack := f.editor.Text()
start := 0
var selections gxui.TextSelectionList
for next := strings.Index(haystack, needle); next != -1; next = strings.Index(haystack[start:], needle) {
start += next
selection := gxui.CreateTextSelection(start, start+len(needle), false)
selections = append(selections, selection)
start++
}
f.editor.Select(selections)
f.display.SetText(fmt.Sprintf("%s: %d results found", needle, len(selections)))
})
return f.display
}
func (e *CodeEditor) KeyPress(ev gxui.KeyboardEvent) (consume bool) {
switch ev.Key {
case gxui.KeyTab:
replace := true
for _, sel := range e.controller.Selections() {
start, end := sel.Range()
if e.controller.LineIndex(start) != e.controller.LineIndex(end) {
replace = false
break
}
}
switch {
case replace:
e.controller.ReplaceAll(strings.Repeat(" ", e.tabWidth))
e.controller.Deselect(false)
case ev.Modifier.Shift():
e.controller.UnindentSelection()
default:
e.controller.IndentSelection()
}
return true
case gxui.KeySpace:
if ev.Modifier.Control() {
e.ShowSuggestionList()
return
}
case gxui.KeyUp:
fallthrough
case gxui.KeyDown:
if e.IsSuggestionListShowing() {
return e.suggestionList.KeyPress(ev)
}
case gxui.KeyLeft:
e.HideSuggestionList()
case gxui.KeyRight:
e.HideSuggestionList()
case gxui.KeyEnter:
controller := e.controller
if e.IsSuggestionListShowing() {
text := e.suggestionAdapter.Suggestion(e.suggestionList.Selected()).Code()
start, end := controller.WordAt(e.controller.LastCaret())
controller.SetSelection(gxui.CreateTextSelection(start, end, false))
controller.ReplaceAll(text)
controller.Deselect(false)
e.HideSuggestionList()
} else {
e.controller.ReplaceWithNewlineKeepIndent()
}
return true
case gxui.KeyEscape:
if e.IsSuggestionListShowing() {
e.HideSuggestionList()
return true
}
}
return e.TextBox.KeyPress(ev)
}
func (t *TextBox) MouseMove(ev gxui.MouseEvent) {
t.List.MouseMove(ev)
if t.selectionDragging {
if p, ok := t.RuneIndexAt(ev.Point); ok {
t.selectionDrag = gxui.CreateTextSelection(t.selectionDrag.From(), p, false)
t.selectionDragging = true
t.onRedrawLines.Fire()
}
}
}
func (t *TextBox) lineMouseDown(line TextBoxLine, ev gxui.MouseEvent) {
if ev.Button == gxui.MouseButtonLeft {
p := line.RuneIndexAt(ev.Point)
t.selectionDragging = true
t.selectionDrag = gxui.CreateTextSelection(p, p, false)
if !ev.Modifier.Control() {
t.controller.SetCaret(p)
}
}
}
func (t *DefaultTextBoxLine) PaintSelections(c gxui.Canvas) {
controller := t.textbox.controller
ls, le := controller.LineStart(t.lineIndex), controller.LineEnd(t.lineIndex)
selections := controller.Selections()
if t.textbox.selectionDragging {
interval.Replace(&selections, t.textbox.selectionDrag)
}
interval.Visit(&selections, gxui.CreateTextSelection(ls, le, false), func(s, e uint64, _ int) {
if s < e {
x := t.outer.MeasureRunes(ls, int(s)).W
m := t.outer.MeasureRunes(int(s), int(e))
top := math.Point{X: t.caretWidth + x, Y: 0}
bottom := top.Add(m.Point())
t.outer.PaintSelection(c, top, bottom)
}
})
}
func (r *Redo) Exec(interface{}) (executed, consume bool) {
if r.editor == nil {
r.err = "redo: no file open"
return true, true
}
history := r.editor.History()
edit, ok := history.RedoCurrent()
if !ok {
r.warn = "redo: nothing to redo"
return true, true
}
text, _ := r.editor.Controller().ReplaceAt(r.editor.Runes(), edit.At, edit.At+len(edit.Old), edit.New)
r.editor.Controller().SetTextRunes(text)
absDelta := edit.Delta
if absDelta < 0 {
absDelta = -absDelta
}
r.editor.Controller().SetSelection(gxui.CreateTextSelection(edit.At, edit.At+absDelta, true))
r.editor.ScrollToRune(edit.At)
return true, true
}
func (e *editor) KeyPress(event gxui.KeyboardEvent) bool {
if event.Modifier.Control() || event.Modifier.Super() {
switch event.Key {
case gxui.KeySpace:
e.ShowSuggestionList()
return true
case gxui.KeyS:
if !e.lastModified.IsZero() {
finfo, err := os.Stat(e.filepath)
if err != nil {
panic(err)
}
if finfo.ModTime().After(e.lastModified) {
panic("Cannot save file: written since last open")
}
}
f, err := os.Create(e.filepath)
if err != nil {
panic(err)
}
if !strings.HasSuffix(e.Text(), "\n") {
e.SetText(e.Text() + "\n")
}
if _, err := f.WriteString(e.Text()); err != nil {
panic(err)
}
finfo, err := f.Stat()
if err != nil {
panic(err)
}
e.lastModified = finfo.ModTime()
f.Close()
e.hasChanges = false
return true
case gxui.KeyTab:
return false
}
}
switch event.Key {
case gxui.KeyTab:
// TODO: Gain knowledge about scope, so we know how much to indent.
switch {
case event.Modifier.Shift():
e.Controller().UnindentSelection(e.TabWidth())
default:
e.Controller().IndentSelection(e.TabWidth())
}
return true
case gxui.KeyUp:
fallthrough
case gxui.KeyDown:
if e.IsSuggestionListShowing() {
return e.suggestions.KeyPress(event)
}
case gxui.KeyLeft:
e.HideSuggestionList()
case gxui.KeyRight:
e.HideSuggestionList()
case gxui.KeyEnter:
controller := e.Controller()
if e.IsSuggestionListShowing() {
text := e.adapter.Suggestion(e.suggestions.Selected()).Code()
start, end := controller.WordAt(controller.LastCaret())
controller.SetSelection(gxui.CreateTextSelection(start, end, false))
controller.ReplaceAll(text)
controller.Deselect(false)
e.HideSuggestionList()
} else {
// TODO: implement electric braces. See
// http://www.emacswiki.org/emacs/AutoPairs under
// "Electric-RET".
e.Controller().ReplaceWithNewlineKeepIndent()
}
return true
case gxui.KeyEscape:
if e.IsSuggestionListShowing() {
e.HideSuggestionList()
return true
}
}
return e.CodeEditor.KeyPress(event)
}
func (e *CodeEditor) KeyPress(event gxui.KeyboardEvent) bool {
defer e.storePositions()
if event.Modifier != 0 && event.Modifier != gxui.ModShift {
// ctrl-, alt-, and cmd-/super- keybindings should be dealt
// with by the commands mapped to key bindings.
return false
}
switch event.Key {
case gxui.KeyPeriod:
e.ShowSuggestionList()
return true
case gxui.KeyBackspace:
result := e.TextBox.KeyPress(event)
if e.IsSuggestionListShowing() {
e.SortSuggestionList()
}
return result
case gxui.KeyPageUp, gxui.KeyPageDown, gxui.KeyDelete:
// These are all bindings that the TextBox handles fine.
return e.TextBox.KeyPress(event)
case gxui.KeyTab:
// TODO: Gain knowledge about scope, so we know how much to indent.
switch {
case event.Modifier.Shift():
e.Controller().UnindentSelection()
default:
e.Controller().IndentSelection()
}
return true
case gxui.KeyUp, gxui.KeyDown:
if e.IsSuggestionListShowing() {
return e.suggestions.KeyPress(event)
}
return false
case gxui.KeyLeft, gxui.KeyRight:
if e.IsSuggestionListShowing() {
e.HideSuggestionList()
}
return false
case gxui.KeyEnter:
controller := e.Controller()
if e.IsSuggestionListShowing() {
text := e.adapter.Suggestion(e.suggestions.Selected()).Code()
start, end := controller.WordAt(controller.LastCaret())
controller.SetSelection(gxui.CreateTextSelection(start, end, false))
controller.ReplaceAll(text)
controller.Deselect(false)
e.HideSuggestionList()
return true
}
// TODO: implement electric braces. See
// http://www.emacswiki.org/emacs/AutoPairs under
// "Electric-RET".
e.Controller().ReplaceWithNewlineKeepIndent()
e.ScrollToRune(e.Controller().FirstCaret())
return true
case gxui.KeyEscape:
if e.IsSuggestionListShowing() {
e.HideSuggestionList()
return true
}
// TODO: Keep track of some sort of concept of a "focused" caret and
// focus that.
e.Controller().SetCaret(e.Controller().FirstCaret())
}
return false
}