diff options
Diffstat (limited to 'vendor/github.com/gdamore/tcell/v2/tscreen_unix.go')
-rw-r--r-- | vendor/github.com/gdamore/tcell/v2/tscreen_unix.go | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/vendor/github.com/gdamore/tcell/v2/tscreen_unix.go b/vendor/github.com/gdamore/tcell/v2/tscreen_unix.go new file mode 100644 index 000000000..bc8d9846c --- /dev/null +++ b/vendor/github.com/gdamore/tcell/v2/tscreen_unix.go @@ -0,0 +1,123 @@ +// Copyright 2021 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. + +// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris zos + +package tcell + +import ( + "errors" + "os" + "os/signal" + "syscall" + + "golang.org/x/term" +) + +// engage is used to place the terminal in raw mode and establish screen size, etc. +// Thing of this is as tcell "engaging" the clutch, as it's going to be driving the +// terminal interface. +func (t *tScreen) engage() error { + t.Lock() + defer t.Unlock() + if t.stopQ != nil { + return errors.New("already engaged") + } + if _, err := term.MakeRaw(int(t.in.Fd())); err != nil { + return err + } + if w, h, err := term.GetSize(int(t.in.Fd())); err == nil && w != 0 && h != 0 { + t.cells.Resize(w, h) + } + stopQ := make(chan struct{}) + t.stopQ = stopQ + t.nonBlocking(false) + t.enableMouse(t.mouseFlags) + t.enablePasting(t.pasteEnabled) + signal.Notify(t.sigwinch, syscall.SIGWINCH) + + t.wg.Add(2) + go t.inputLoop(stopQ) + go t.mainLoop(stopQ) + return nil +} + +// disengage is used to release the terminal back to support from the caller. +// Think of this as tcell disengaging the clutch, so that another application +// can take over the terminal interface. This restores the TTY mode that was +// present when the application was first started. +func (t *tScreen) disengage() { + + t.Lock() + t.nonBlocking(true) + stopQ := t.stopQ + t.stopQ = nil + close(stopQ) + t.Unlock() + + // wait for everything to shut down + t.wg.Wait() + + signal.Stop(t.sigwinch) + + // put back normal blocking mode + t.nonBlocking(false) + + // shutdown the screen and disable special modes (e.g. mouse and bracketed paste) + ti := t.ti + t.cells.Resize(0, 0) + t.TPuts(ti.ShowCursor) + t.TPuts(ti.AttrOff) + t.TPuts(ti.Clear) + t.TPuts(ti.ExitCA) + t.TPuts(ti.ExitKeypad) + t.enableMouse(0) + t.enablePasting(false) + + // restore the termios that we were started with + _ = term.Restore(int(t.in.Fd()), t.saved) + +} + +// initialize is used at application startup, and sets up the initial values +// including file descriptors used for terminals and saving the initial state +// so that it can be restored when the application terminates. +func (t *tScreen) initialize() error { + var err error + t.out = os.Stdout + t.in = os.Stdin + t.saved, err = term.GetState(int(os.Stdin.Fd())) + if err != nil { + return err + } + return nil +} + +// finalize is used to at application shutdown, and restores the terminal +// to it's initial state. It should not be called more than once. +func (t *tScreen) finalize() { + + t.disengage() +} + +// getWinSize is called to obtain the terminal dimensions. +func (t *tScreen) getWinSize() (int, int, error) { + return term.GetSize(int(t.in.Fd())) +} + +// Beep emits a beep to the terminal. +func (t *tScreen) Beep() error { + t.writeString(string(byte(7))) + return nil +} |