65 lines
1.2 KiB
Go
65 lines
1.2 KiB
Go
package terminal
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import (
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"fmt"
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"golang.org/x/term"
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"os"
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)
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// Screen the size of the screen in rows and columns
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type Screen struct {
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Rows int
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Cols int
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}
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// Size Get the size of the terminal in rows and columns
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func Size() *Screen {
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cols := 80
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rows := 24
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var err interface{}
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// Try the syscall first
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cols, rows, err = term.GetSize(int(os.Stdin.Fd()))
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if err == nil {
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return &Screen{rows, cols}
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}
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// Figure out the size the hard way
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if term.IsTerminal(int(os.Stdin.Fd())) {
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rows, cols = sizeTrick()
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}
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return &Screen{rows, cols}
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}
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func sizeTrick() (rows int, cols int) {
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// Move cursor to location further than likely screen size
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// The cursor will move to maximum available position
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fmt.Print(Code("999C") + Code("999B"))
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// Ask the terminal where the cursor is
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fmt.Print(LocateCursor)
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// Read stdin looking for the reported location
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buffer := ""
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for char, _ := ReadKey(); char != 'R'; char, _ = ReadKey() {
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if char == '\x1b' || char == '[' {
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continue
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}
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if char == 'R' || char == '\x00' {
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break
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}
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buffer += string(char)
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}
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_, err := fmt.Sscanf(buffer, "%d;%d", &rows, &cols)
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if err != nil {
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panic(err)
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}
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return rows, cols
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}
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