From 64fa922ec013079f8f0c90fc9e93c56db3611d30 Mon Sep 17 00:00:00 2001 From: Tulir Asokan Date: Sun, 22 Apr 2018 21:25:06 +0300 Subject: Switch to dep --- vendor/maunium.net/go/tcell/simulation.go | 510 ++++++++++++++++++++++++++++++ 1 file changed, 510 insertions(+) create mode 100644 vendor/maunium.net/go/tcell/simulation.go (limited to 'vendor/maunium.net/go/tcell/simulation.go') diff --git a/vendor/maunium.net/go/tcell/simulation.go b/vendor/maunium.net/go/tcell/simulation.go new file mode 100644 index 0000000..59f7e46 --- /dev/null +++ b/vendor/maunium.net/go/tcell/simulation.go @@ -0,0 +1,510 @@ +// Copyright 2016 The TCell Authors +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use 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 tcell + +import ( + "sync" + "unicode/utf8" + + "golang.org/x/text/transform" +) + +// NewSimulationScreen returns a SimulationScreen. Note that +// SimulationScreen is also a Screen. +func NewSimulationScreen(charset string) SimulationScreen { + if charset == "" { + charset = "UTF-8" + } + s := &simscreen{charset: charset} + return s +} + +// SimulationScreen represents a screen simulation. This is intended to +// be a superset of normal Screens, but also adds some important interfaces +// for testing. +type SimulationScreen interface { + // InjectKeyBytes injects a stream of bytes corresponding to + // the native encoding (see charset). It turns true if the entire + // set of bytes were processed and delivered as KeyEvents, false + // if any bytes were not fully understood. Any bytes that are not + // fully converted are discarded. + InjectKeyBytes(buf []byte) bool + + // InjectKey injects a key event. The rune is a UTF-8 rune, post + // any translation. + InjectKey(key Key, r rune, mod ModMask) + + // InjectMouse injects a mouse event. + InjectMouse(x, y int, buttons ButtonMask, mod ModMask) + + // SetSize resizes the underlying physical screen. It also causes + // a resize event to be injected during the next Show() or Sync(). + // A new physical contents array will be allocated (with data from + // the old copied), so any prior value obtained with GetContents + // won't be used anymore + SetSize(width, height int) + + // GetContents returns screen contents as an array of + // cells, along with the physical width & height. Note that the + // physical contents will be used until the next time SetSize() + // is called. + GetContents() (cells []SimCell, width int, height int) + + // GetCursor returns the cursor details. + GetCursor() (x int, y int, visible bool) + + Screen +} + +// SimCell represents a simulated screen cell. The purpose of this +// is to track on screen content. +type SimCell struct { + // Bytes is the actual character bytes. Normally this is + // rune data, but it could be be data in another encoding system. + Bytes []byte + + // Style is the style used to display the data. + Style Style + + // Runes is the list of runes, unadulterated, in UTF-8. + Runes []rune +} + +type simscreen struct { + physw int + physh int + fini bool + style Style + evch chan Event + quit chan struct{} + + front []SimCell + back CellBuffer + clear bool + cursorx int + cursory int + cursorvis bool + mouse bool + charset string + encoder transform.Transformer + decoder transform.Transformer + fillchar rune + fillstyle Style + fallback map[rune]string + + sync.Mutex +} + +func (s *simscreen) Init() error { + s.evch = make(chan Event, 10) + s.quit = make(chan struct{}) + s.fillchar = 'X' + s.fillstyle = StyleDefault + s.mouse = false + s.physw = 80 + s.physh = 25 + s.cursorx = -1 + s.cursory = -1 + s.style = StyleDefault + + if enc := GetEncoding(s.charset); enc != nil { + s.encoder = enc.NewEncoder() + s.decoder = enc.NewDecoder() + } else { + return ErrNoCharset + } + + s.front = make([]SimCell, s.physw*s.physh) + s.back.Resize(80, 25) + + // default fallbacks + s.fallback = make(map[rune]string) + for k, v := range RuneFallbacks { + s.fallback[k] = v + } + return nil +} + +func (s *simscreen) Fini() { + s.Lock() + s.fini = true + s.back.Resize(0, 0) + s.Unlock() + if s.quit != nil { + close(s.quit) + } + s.physw = 0 + s.physh = 0 + s.front = nil +} + +func (s *simscreen) SetStyle(style Style) { + s.Lock() + s.style = style + s.Unlock() +} + +func (s *simscreen) Clear() { + s.Fill(' ', s.style) +} + +func (s *simscreen) Fill(r rune, style Style) { + s.Lock() + s.back.Fill(r, style) + s.Unlock() +} + +func (s *simscreen) SetCell(x, y int, style Style, ch ...rune) { + + if len(ch) > 0 { + s.SetContent(x, y, ch[0], ch[1:], style) + } else { + s.SetContent(x, y, ' ', nil, style) + } +} + +func (s *simscreen) SetContent(x, y int, mainc rune, combc []rune, st Style) { + + s.Lock() + s.back.SetContent(x, y, mainc, combc, st) + s.Unlock() +} + +func (s *simscreen) GetContent(x, y int) (rune, []rune, Style, int) { + var mainc rune + var combc []rune + var style Style + var width int + s.Lock() + mainc, combc, style, width = s.back.GetContent(x, y) + s.Unlock() + return mainc, combc, style, width +} + +func (s *simscreen) drawCell(x, y int) int { + + mainc, combc, style, width := s.back.GetContent(x, y) + if !s.back.Dirty(x, y) { + return width + } + if x >= s.physw || y >= s.physh || x < 0 || y < 0 { + return width + } + simc := &s.front[(y*s.physw)+x] + + if style == StyleDefault { + style = s.style + } + simc.Style = style + simc.Runes = append([]rune{mainc}, combc...) + + // now emit runes - taking care to not overrun width with a + // wide character, and to ensure that we emit exactly one regular + // character followed up by any residual combing characters + + simc.Bytes = nil + + if x > s.physw-width { + simc.Runes = []rune{' '} + simc.Bytes = []byte{' '} + return width + } + + lbuf := make([]byte, 12) + ubuf := make([]byte, 12) + nout := 0 + + for _, r := range simc.Runes { + + l := utf8.EncodeRune(ubuf, r) + + nout, _, _ = s.encoder.Transform(lbuf, ubuf[:l], true) + + if nout == 0 || lbuf[0] == '\x1a' { + + // skip combining + + if subst, ok := s.fallback[r]; ok { + simc.Bytes = append(simc.Bytes, + []byte(subst)...) + + } else if r >= ' ' && r <= '~' { + simc.Bytes = append(simc.Bytes, byte(r)) + + } else if simc.Bytes == nil { + simc.Bytes = append(simc.Bytes, '?') + } + } else { + simc.Bytes = append(simc.Bytes, lbuf[:nout]...) + } + } + s.back.SetDirty(x, y, false) + return width +} + +func (s *simscreen) ShowCursor(x, y int) { + s.Lock() + s.cursorx, s.cursory = x, y + s.showCursor() + s.Unlock() +} + +func (s *simscreen) HideCursor() { + s.ShowCursor(-1, -1) +} + +func (s *simscreen) showCursor() { + + x, y := s.cursorx, s.cursory + if x < 0 || y < 0 || x >= s.physw || y >= s.physh { + s.cursorvis = false + } else { + s.cursorvis = true + } +} + +func (s *simscreen) hideCursor() { + // does not update cursor position + s.cursorvis = false +} + +func (s *simscreen) Show() { + s.Lock() + s.resize() + s.draw() + s.Unlock() +} + +func (s *simscreen) clearScreen() { + // We emulate a hardware clear by filling with a specific pattern + for i := range s.front { + s.front[i].Style = s.fillstyle + s.front[i].Runes = []rune{s.fillchar} + s.front[i].Bytes = []byte{byte(s.fillchar)} + } + s.clear = false +} + +func (s *simscreen) draw() { + s.hideCursor() + if s.clear { + s.clearScreen() + } + + w, h := s.back.Size() + for y := 0; y < h; y++ { + for x := 0; x < w; x++ { + width := s.drawCell(x, y) + x += width - 1 + } + } + s.showCursor() +} + +func (s *simscreen) EnableMouse() { + s.mouse = true +} + +func (s *simscreen) DisableMouse() { + s.mouse = false +} + +func (s *simscreen) Size() (int, int) { + s.Lock() + w, h := s.back.Size() + s.Unlock() + return w, h +} + +func (s *simscreen) resize() { + w, h := s.physw, s.physh + ow, oh := s.back.Size() + if w != ow || h != oh { + s.back.Resize(w, h) + ev := NewEventResize(w, h) + s.PostEvent(ev) + } +} + +func (s *simscreen) Colors() int { + return 256 +} + +func (s *simscreen) PollEvent() Event { + select { + case <-s.quit: + return nil + case ev := <-s.evch: + return ev + } +} + +func (s *simscreen) PostEventWait(ev Event) { + s.evch <- ev +} + +func (s *simscreen) PostEvent(ev Event) error { + select { + case s.evch <- ev: + return nil + default: + return ErrEventQFull + } +} + +func (s *simscreen) InjectMouse(x, y int, buttons ButtonMask, mod ModMask) { + ev := NewEventMouse(x, y, buttons, mod, false) + s.PostEvent(ev) +} + +func (s *simscreen) InjectKey(key Key, r rune, mod ModMask) { + ev := NewEventKey(key, r, mod) + s.PostEvent(ev) +} + +func (s *simscreen) InjectKeyBytes(b []byte) bool { + failed := false + +outer: + for len(b) > 0 { + if b[0] >= ' ' && b[0] <= 0x7F { + // printable ASCII easy to deal with -- no encodings + ev := NewEventKey(KeyRune, rune(b[0]), ModNone) + s.PostEvent(ev) + b = b[1:] + continue + } + + if b[0] < 0x80 { + mod := ModNone + // No encodings start with low numbered values + if Key(b[0]) >= KeyCtrlA && Key(b[0]) <= KeyCtrlZ { + mod = ModCtrl + } + ev := NewEventKey(Key(b[0]), 0, mod) + s.PostEvent(ev) + continue + } + + utfb := make([]byte, len(b)*4) // worst case + for l := 1; l < len(b); l++ { + s.decoder.Reset() + nout, nin, _ := s.decoder.Transform(utfb, b[:l], true) + + if nout != 0 { + r, _ := utf8.DecodeRune(utfb[:nout]) + if r != utf8.RuneError { + ev := NewEventKey(KeyRune, r, ModNone) + s.PostEvent(ev) + } + b = b[nin:] + continue outer + } + } + failed = true + b = b[1:] + continue + } + + return !failed +} + +func (s *simscreen) Sync() { + s.Lock() + s.clear = true + s.resize() + s.back.Invalidate() + s.draw() + s.Unlock() +} + +func (s *simscreen) CharacterSet() string { + return s.charset +} + +func (s *simscreen) SetSize(w, h int) { + s.Lock() + newc := make([]SimCell, w*h) + for row := 0; row < h && row < s.physh; row++ { + for col := 0; col < w && col < s.physw; col++ { + newc[(row*w)+col] = s.front[(row*s.physw)+col] + } + } + s.cursorx, s.cursory = -1, -1 + s.physw, s.physh = w, h + s.front = newc + s.back.Resize(w, h) + s.Unlock() +} + +func (s *simscreen) GetContents() ([]SimCell, int, int) { + s.Lock() + cells, w, h := s.front, s.physw, s.physh + s.Unlock() + return cells, w, h +} + +func (s *simscreen) GetCursor() (int, int, bool) { + s.Lock() + x, y, vis := s.cursorx, s.cursory, s.cursorvis + s.Unlock() + return x, y, vis +} + +func (s *simscreen) RegisterRuneFallback(r rune, subst string) { + s.Lock() + s.fallback[r] = subst + s.Unlock() +} + +func (s *simscreen) UnregisterRuneFallback(r rune) { + s.Lock() + delete(s.fallback, r) + s.Unlock() +} + +func (s *simscreen) CanDisplay(r rune, checkFallbacks bool) bool { + + if enc := s.encoder; enc != nil { + nb := make([]byte, 6) + ob := make([]byte, 6) + num := utf8.EncodeRune(ob, r) + + enc.Reset() + dst, _, err := enc.Transform(nb, ob[:num], true) + if dst != 0 && err == nil && nb[0] != '\x1A' { + return true + } + } + if !checkFallbacks { + return false + } + if _, ok := s.fallback[r]; ok { + return true + } + return false +} + +func (s *simscreen) HasMouse() bool { + return false +} + +func (s *simscreen) Resize(int, int, int, int) {} + +func (s *simscreen) HasKey(Key) bool { + return true +} + +func (s *simscreen) SetTitle(title string) {} -- cgit v1.2.3