vendor dependencies, make some changes to how input is done

vendor/github.com/hajimehoshi/ebiten/v2/internal/ui/input.go

@@ -0,0 +1,81 @@
+// Copyright 2022 The Ebitengine Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package ui
+
+import (
+	"io/fs"
+	"unicode"
+)
+
+type MouseButton int
+
+const (
+	MouseButton0   MouseButton = iota // The 'left' button
+	MouseButton1                      // The 'right' button
+	MouseButton2                      // The 'middle' button
+	MouseButton3                      // The additional button (usually browser-back)
+	MouseButton4                      // The additional button (usually browser-forward)
+	MouseButtonMax = MouseButton4
+)
+
+type TouchID int
+
+type Touch struct {
+	ID TouchID
+	X  int
+	Y  int
+}
+
+type InputState struct {
+	KeyPressed         [KeyMax + 1]bool
+	MouseButtonPressed [MouseButtonMax + 1]bool
+	CursorX            float64
+	CursorY            float64
+	WheelX             float64
+	WheelY             float64
+	Touches            []Touch
+	Runes              []rune
+	WindowBeingClosed  bool
+	DroppedFiles       fs.FS
+}
+
+func (i *InputState) copyAndReset(dst *InputState) {
+	dst.KeyPressed = i.KeyPressed
+	dst.MouseButtonPressed = i.MouseButtonPressed
+	dst.CursorX = i.CursorX
+	dst.CursorY = i.CursorY
+	dst.WheelX = i.WheelX
+	dst.WheelY = i.WheelY
+	dst.Touches = append(dst.Touches[:0], i.Touches...)
+	dst.Runes = append(dst.Runes[:0], i.Runes...)
+	dst.WindowBeingClosed = i.WindowBeingClosed
+	dst.DroppedFiles = i.DroppedFiles
+
+	// Reset the members that are updated by deltas, rather than absolute values.
+	i.WheelX = 0
+	i.WheelY = 0
+	i.Runes = i.Runes[:0]
+
+	// Reset the members that are never reset until they are explicitly done.
+	i.WindowBeingClosed = false
+	i.DroppedFiles = nil
+}
+
+func (i *InputState) appendRune(r rune) {
+	if !unicode.IsPrint(r) {
+		return
+	}
+	i.Runes = append(i.Runes, r)
+}