129 lines
2.3 KiB
Go
129 lines
2.3 KiB
Go
package completion
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import (
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"github.com/diamondburned/cchat-gtk/internal/ui/primitives/scrollinput"
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"github.com/diamondburned/cchat/utils/split"
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"github.com/gotk3/gotk3/gtk"
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)
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type Completeable interface {
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Update([]string, int) []gtk.IWidget
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Word(i int) string
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}
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type Completer struct {
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ctrl Completeable
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Input *gtk.TextView
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Buffer *gtk.TextBuffer
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List *gtk.ListBox
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Popover *gtk.Popover
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Words []string
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Index int
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Cursor int
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}
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func WrapCompleter(input *gtk.TextView, ctrl Completeable) {
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NewCompleter(input, ctrl)
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}
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func NewCompleter(input *gtk.TextView, ctrl Completeable) *Completer {
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l, _ := gtk.ListBoxNew()
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l.Show()
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s := scrollinput.NewVScroll(150)
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s.Add(l)
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s.Show()
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p := NewPopover(input)
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p.Add(s)
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input.Connect("key-press-event", KeyDownHandler(l, input.GrabFocus))
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ibuf, _ := input.GetBuffer()
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c := &Completer{
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Input: input,
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Buffer: ibuf,
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List: l,
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Popover: p,
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ctrl: ctrl,
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}
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// This one is for buffer modification.
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ibuf.Connect("end-user-action", c.onChange)
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// This one is for when the cursor moves.
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input.Connect("move-cursor", c.onChange)
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l.Connect("row-activated", func(l *gtk.ListBox, r *gtk.ListBoxRow) {
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SwapWord(ibuf, ctrl.Word(r.GetIndex()), c.Cursor)
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c.Clear()
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c.Hide()
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input.GrabFocus()
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})
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return c
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}
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func (c *Completer) Hide() {
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c.Popover.Popdown()
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}
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func (c *Completer) Clear() {
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var children = c.List.GetChildren()
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if children.Length() == 0 {
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return
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}
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children.Foreach(func(i interface{}) {
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w := i.(gtk.IWidget).ToWidget()
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c.List.Remove(w)
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w.Destroy()
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})
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}
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func (c *Completer) onChange() {
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t, v, blank := State(c.Buffer)
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c.Cursor = v
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// If the curssor is on a blank character, then we should not
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// autocomplete anything, so we set the states to nil.
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if blank {
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c.Words = nil
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c.Index = -1
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} else {
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c.Words, c.Index = split.SpaceIndexed(t, v)
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}
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c.complete()
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}
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func (c *Completer) complete() {
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c.Clear()
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var widgets []gtk.IWidget
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if len(c.Words) > 0 {
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widgets = c.ctrl.Update(c.Words, c.Index)
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}
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if len(widgets) > 0 {
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c.Popover.SetPointingTo(CursorRect(c.Input))
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c.Popover.Popup()
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} else {
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c.Hide()
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return
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}
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for i, widget := range widgets {
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r, _ := gtk.ListBoxRowNew()
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r.Add(widget)
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r.Show()
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c.List.Add(r)
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if i == 0 {
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c.List.SelectRow(r)
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}
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}
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}
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