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https://github.com/go-sylixos/elvish.git
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d2936c06a1
This is needed since there can now be an arbitrary number of widgets competing for vertical space. - Add a new MaxHeight method to the tk.Widget interface to provide hint on how to distribute the height. - Implement the algorithm in distributeHeight in cli/app.go.
84 lines
2.1 KiB
Go
84 lines
2.1 KiB
Go
package tk
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import (
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"src.elv.sh/pkg/cli/term"
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)
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// ComboBox is a Widget that combines a ListBox and a CodeArea.
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type ComboBox interface {
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Widget
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// Returns the embedded codearea widget.
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CodeArea() CodeArea
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// Returns the embedded listbox widget.
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ListBox() ListBox
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// Forces the filtering to rerun.
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Refilter()
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}
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// ComboBoxSpec specifies the configuration and initial state for ComboBox.
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type ComboBoxSpec struct {
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CodeArea CodeAreaSpec
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ListBox ListBoxSpec
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OnFilter func(ComboBox, string)
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}
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type comboBox struct {
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codeArea CodeArea
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listBox ListBox
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OnFilter func(ComboBox, string)
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// Last filter value.
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lastFilter string
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}
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// NewComboBox creates a new ComboBox from the given spec.
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func NewComboBox(spec ComboBoxSpec) ComboBox {
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if spec.OnFilter == nil {
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spec.OnFilter = func(ComboBox, string) {}
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}
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w := &comboBox{
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codeArea: NewCodeArea(spec.CodeArea),
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listBox: NewListBox(spec.ListBox),
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OnFilter: spec.OnFilter,
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}
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w.OnFilter(w, "")
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return w
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}
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// Render renders the codearea and the listbox below it.
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func (w *comboBox) Render(width, height int) *term.Buffer {
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buf := w.codeArea.Render(width, height)
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bufListBox := w.listBox.Render(width, height-len(buf.Lines))
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buf.Extend(bufListBox, false)
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return buf
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}
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func (w *comboBox) MaxHeight(width, height int) int {
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return w.codeArea.MaxHeight(width, height) + w.listBox.MaxHeight(width, height)
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}
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// Handle first lets the listbox handle the event, and if it is unhandled, lets
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// the codearea handle it. If the codearea has handled the event and the code
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// content has changed, it calls OnFilter with the new content.
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func (w *comboBox) Handle(event term.Event) bool {
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if w.listBox.Handle(event) {
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return true
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}
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if w.codeArea.Handle(event) {
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filter := w.codeArea.CopyState().Buffer.Content
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if filter != w.lastFilter {
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w.OnFilter(w, filter)
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w.lastFilter = filter
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}
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return true
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}
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return false
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}
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func (w *comboBox) Refilter() {
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w.OnFilter(w, w.codeArea.CopyState().Buffer.Content)
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}
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func (w *comboBox) CodeArea() CodeArea { return w.codeArea }
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func (w *comboBox) ListBox() ListBox { return w.listBox }
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