aboutsummaryrefslogtreecommitdiffstats
path: root/lib
diff options
context:
space:
mode:
authorJeffas <dev@jeffas.io>2019-07-26 14:29:40 +0100
committerDrew DeVault <sir@cmpwn.com>2019-07-26 14:39:42 -0400
commitcded067bc3919a77b17feedd877e4590e7c95f4a (patch)
treef359c28abd705167e3bf013faf8d4d1af4887f29 /lib
parentaabe3d9b3a58efd9f0ad9b39917b85092d0955a1 (diff)
downloadaerc-cded067bc3919a77b17feedd877e4590e7c95f4a.tar.gz
Add tab completion to textinputs
This adds tab completion to textinput components. They can be configured with a completion function. This function is called when the user presses <tab>. The first completion is initially shown to the user inserted into the text. Repeated presses of <tab> or <backtab> cycle through the completions list. The completions list is invalidated when any other non-tab-like key is pressed. Also changed is some logic for current completion generation so that all available commands are returned when <tab> is pressed with no current text and similarly for arguments of commands.
Diffstat (limited to 'lib')
-rw-r--r--lib/ui/textinput.go84
1 files changed, 74 insertions, 10 deletions
diff --git a/lib/ui/textinput.go b/lib/ui/textinput.go
index 2feeb842..e5a23379 100644
--- a/lib/ui/textinput.go
+++ b/lib/ui/textinput.go
@@ -5,20 +5,23 @@ import (
"github.com/mattn/go-runewidth"
)
-// TODO: Attach history and tab completion providers
+// TODO: Attach history providers
// TODO: scrolling
type TextInput struct {
Invalidatable
- cells int
- ctx *Context
- focus bool
- index int
- password bool
- prompt string
- scroll int
- text []rune
- change []func(ti *TextInput)
+ cells int
+ ctx *Context
+ focus bool
+ index int
+ password bool
+ prompt string
+ scroll int
+ text []rune
+ change []func(ti *TextInput)
+ tabcomplete func(s string) []string
+ completions []string
+ completeIndex int
}
// Creates a new TextInput. TextInputs will render a "textbox" in the entire
@@ -42,6 +45,12 @@ func (ti *TextInput) Prompt(prompt string) *TextInput {
return ti
}
+func (ti *TextInput) TabComplete(
+ tabcomplete func(s string) []string) *TextInput {
+ ti.tabcomplete = tabcomplete
+ return ti
+}
+
func (ti *TextInput) String() string {
return string(ti.text)
}
@@ -161,6 +170,41 @@ func (ti *TextInput) backspace() {
}
}
+func (ti *TextInput) nextCompletion() {
+ if ti.completions == nil {
+ if ti.tabcomplete == nil {
+ return
+ }
+ ti.completions = ti.tabcomplete(ti.StringLeft())
+ ti.completeIndex = 0
+ } else {
+ ti.completeIndex++
+ if ti.completeIndex >= len(ti.completions) {
+ ti.completeIndex = 0
+ }
+ }
+ if len(ti.completions) > 0 {
+ ti.Set(ti.completions[ti.completeIndex] + ti.StringRight())
+ }
+}
+
+func (ti *TextInput) previousCompletion() {
+ if ti.completions == nil || len(ti.completions) == 0 {
+ return
+ }
+ ti.completeIndex--
+ if ti.completeIndex < 0 {
+ ti.completeIndex = len(ti.completions) - 1
+ }
+ if len(ti.completions) > 0 {
+ ti.Set(ti.completions[ti.completeIndex] + ti.StringRight())
+ }
+}
+
+func (ti *TextInput) invalidateCompletions() {
+ ti.completions = nil
+}
+
func (ti *TextInput) onChange() {
for _, change := range ti.change {
change(ti)
@@ -176,32 +220,52 @@ func (ti *TextInput) Event(event tcell.Event) bool {
case *tcell.EventKey:
switch event.Key() {
case tcell.KeyBackspace, tcell.KeyBackspace2:
+ ti.invalidateCompletions()
ti.backspace()
case tcell.KeyCtrlD, tcell.KeyDelete:
+ ti.invalidateCompletions()
ti.deleteChar()
case tcell.KeyCtrlB, tcell.KeyLeft:
+ ti.invalidateCompletions()
if ti.index > 0 {
ti.index--
ti.ensureScroll()
ti.Invalidate()
}
case tcell.KeyCtrlF, tcell.KeyRight:
+ ti.invalidateCompletions()
if ti.index < len(ti.text) {
ti.index++
ti.ensureScroll()
ti.Invalidate()
}
case tcell.KeyCtrlA, tcell.KeyHome:
+ ti.invalidateCompletions()
ti.index = 0
ti.ensureScroll()
ti.Invalidate()
case tcell.KeyCtrlE, tcell.KeyEnd:
+ ti.invalidateCompletions()
ti.index = len(ti.text)
ti.ensureScroll()
ti.Invalidate()
case tcell.KeyCtrlW:
+ ti.invalidateCompletions()
ti.deleteWord()
+ case tcell.KeyTab:
+ if ti.tabcomplete != nil {
+ ti.nextCompletion()
+ } else {
+ ti.insert('\t')
+ }
+ ti.Invalidate()
+ case tcell.KeyBacktab:
+ if ti.tabcomplete != nil {
+ ti.previousCompletion()
+ }
+ ti.Invalidate()
case tcell.KeyRune:
+ ti.invalidateCompletions()
ti.insert(event.Rune())
}
}