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author | Ramon Fernandez <ramon@mongodb.com> | 2016-08-25 16:34:34 -0400 |
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committer | Ramon Fernandez <ramon@mongodb.com> | 2016-08-25 16:54:18 -0400 |
commit | c330c9991ab45e7d0685d53e699ef26dba065660 (patch) | |
tree | 3dc5cd06b5f6c7eaaa4cb20cbe763504c14a772b /src/mongo/gotools/vendor/src/github.com/nsf/termbox-go/api_windows.go | |
parent | eb62b862d5ebf179a1bcd9f394070e69c30188ab (diff) | |
download | mongo-c330c9991ab45e7d0685d53e699ef26dba065660.tar.gz |
Import tools: 5b883d86fdb4df55036d5dba2ca6f9dfa0750b44 from branch v3.3
ref: 1ac1389bda..5b883d86fd
for: 3.3.12
SERVER-25814 Initial vendor import: tools
Diffstat (limited to 'src/mongo/gotools/vendor/src/github.com/nsf/termbox-go/api_windows.go')
-rw-r--r-- | src/mongo/gotools/vendor/src/github.com/nsf/termbox-go/api_windows.go | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/src/mongo/gotools/vendor/src/github.com/nsf/termbox-go/api_windows.go b/src/mongo/gotools/vendor/src/github.com/nsf/termbox-go/api_windows.go new file mode 100644 index 00000000000..7def30a67df --- /dev/null +++ b/src/mongo/gotools/vendor/src/github.com/nsf/termbox-go/api_windows.go @@ -0,0 +1,239 @@ +package termbox + +import ( + "syscall" +) + +// public API + +// Initializes termbox library. This function should be called before any other functions. +// After successful initialization, the library must be finalized using 'Close' function. +// +// Example usage: +// err := termbox.Init() +// if err != nil { +// panic(err) +// } +// defer termbox.Close() +func Init() error { + var err error + + interrupt, err = create_event() + if err != nil { + return err + } + + in, err = syscall.Open("CONIN$", syscall.O_RDWR, 0) + if err != nil { + return err + } + out, err = syscall.Open("CONOUT$", syscall.O_RDWR, 0) + if err != nil { + return err + } + + err = get_console_mode(in, &orig_mode) + if err != nil { + return err + } + + err = set_console_mode(in, enable_window_input) + if err != nil { + return err + } + + orig_size = get_term_size(out) + win_size := get_win_size(out) + + err = set_console_screen_buffer_size(out, win_size) + if err != nil { + return err + } + + err = get_console_cursor_info(out, &orig_cursor_info) + if err != nil { + return err + } + + show_cursor(false) + term_size = get_term_size(out) + back_buffer.init(int(term_size.x), int(term_size.y)) + front_buffer.init(int(term_size.x), int(term_size.y)) + back_buffer.clear() + front_buffer.clear() + clear() + + diffbuf = make([]diff_msg, 0, 32) + + go input_event_producer() + IsInit = true + return nil +} + +// Finalizes termbox library, should be called after successful initialization +// when termbox's functionality isn't required anymore. +func Close() { + // we ignore errors here, because we can't really do anything about them + Clear(0, 0) + Flush() + + // stop event producer + cancel_comm <- true + set_event(interrupt) + select { + case <-input_comm: + default: + } + <-cancel_done_comm + + set_console_cursor_info(out, &orig_cursor_info) + set_console_cursor_position(out, coord{}) + set_console_screen_buffer_size(out, orig_size) + set_console_mode(in, orig_mode) + syscall.Close(in) + syscall.Close(out) + syscall.Close(interrupt) + IsInit = false +} + +// Interrupt an in-progress call to PollEvent by causing it to return +// EventInterrupt. Note that this function will block until the PollEvent +// function has successfully been interrupted. +func Interrupt() { + interrupt_comm <- struct{}{} +} + +// Synchronizes the internal back buffer with the terminal. +func Flush() error { + update_size_maybe() + prepare_diff_messages() + for _, diff := range diffbuf { + r := small_rect{ + left: 0, + top: diff.pos, + right: term_size.x - 1, + bottom: diff.pos + diff.lines - 1, + } + write_console_output(out, diff.chars, r) + } + if !is_cursor_hidden(cursor_x, cursor_y) { + move_cursor(cursor_x, cursor_y) + } + return nil +} + +// Sets the position of the cursor. See also HideCursor(). +func SetCursor(x, y int) { + if is_cursor_hidden(cursor_x, cursor_y) && !is_cursor_hidden(x, y) { + show_cursor(true) + } + + if !is_cursor_hidden(cursor_x, cursor_y) && is_cursor_hidden(x, y) { + show_cursor(false) + } + + cursor_x, cursor_y = x, y + if !is_cursor_hidden(cursor_x, cursor_y) { + move_cursor(cursor_x, cursor_y) + } +} + +// The shortcut for SetCursor(-1, -1). +func HideCursor() { + SetCursor(cursor_hidden, cursor_hidden) +} + +// Changes cell's parameters in the internal back buffer at the specified +// position. +func SetCell(x, y int, ch rune, fg, bg Attribute) { + if x < 0 || x >= back_buffer.width { + return + } + if y < 0 || y >= back_buffer.height { + return + } + + back_buffer.cells[y*back_buffer.width+x] = Cell{ch, fg, bg} +} + +// Returns a slice into the termbox's back buffer. You can get its dimensions +// using 'Size' function. The slice remains valid as long as no 'Clear' or +// 'Flush' function calls were made after call to this function. +func CellBuffer() []Cell { + return back_buffer.cells +} + +// Wait for an event and return it. This is a blocking function call. +func PollEvent() Event { + select { + case ev := <-input_comm: + return ev + case <-interrupt_comm: + return Event{Type: EventInterrupt} + } +} + +// Returns the size of the internal back buffer (which is mostly the same as +// console's window size in characters). But it doesn't always match the size +// of the console window, after the console size has changed, the internal back +// buffer will get in sync only after Clear or Flush function calls. +func Size() (int, int) { + return int(term_size.x), int(term_size.y) +} + +// Clears the internal back buffer. +func Clear(fg, bg Attribute) error { + foreground, background = fg, bg + update_size_maybe() + back_buffer.clear() + return nil +} + +// Sets termbox input mode. Termbox has two input modes: +// +// 1. Esc input mode. When ESC sequence is in the buffer and it doesn't match +// any known sequence. ESC means KeyEsc. This is the default input mode. +// +// 2. Alt input mode. When ESC sequence is in the buffer and it doesn't match +// any known sequence. ESC enables ModAlt modifier for the next keyboard event. +// +// Both input modes can be OR'ed with Mouse mode. Setting Mouse mode bit up will +// enable mouse button press/release and drag events. +// +// If 'mode' is InputCurrent, returns the current input mode. See also Input* +// constants. +func SetInputMode(mode InputMode) InputMode { + if mode == InputCurrent { + return input_mode + } + if mode&InputMouse != 0 { + err := set_console_mode(in, enable_window_input|enable_mouse_input|enable_extended_flags) + if err != nil { + panic(err) + } + } else { + err := set_console_mode(in, enable_window_input) + if err != nil { + panic(err) + } + } + + input_mode = mode + return input_mode +} + +// Sets the termbox output mode. +// +// Windows console does not support extra colour modes, +// so this will always set and return OutputNormal. +func SetOutputMode(mode OutputMode) OutputMode { + return OutputNormal +} + +// Sync comes handy when something causes desync between termbox's understanding +// of a terminal buffer and the reality. Such as a third party process. Sync +// forces a complete resync between the termbox and a terminal, it may not be +// visually pretty though. At the moment on Windows it does nothing. +func Sync() error { + return nil +} |