Changed project layout and updated readme

internal/clipboard/clipboard.go

@@ -0,0 +1,53 @@
+package clipboard
+
+import "github.com/zyedidia/clipboard"
+
+type ClipMethod uint8
+
+const (
+	ClipExternal ClipMethod = iota
+	_
+	ClipInternal
+)
+
+var ClipCurrentMethod ClipMethod
+
+var internalClipboard string
+
+// ClipInitialize will initialize the clipboard for the given method first,
+// and if that fails, an internal method will be chosen, instead. The Method
+// chosen is returned along with any error that may have occurred while
+// selecting the method. The error is not fatal because an internal method
+// is used.
+func ClipInitialize(m ClipMethod) (ClipMethod, error) {
+	err := clipboard.Initialize()
+	if err != nil {
+		ClipCurrentMethod = ClipInternal
+		return ClipInternal, err
+	}
+	ClipCurrentMethod = ClipExternal
+	return ClipExternal, nil
+}
+
+// ClipRead receives the clipboard contents using the ClipCurrentMethod.
+func ClipRead() (string, error) {
+	switch ClipCurrentMethod {
+	case ClipExternal:
+		return clipboard.ReadAll("clipboard")
+	case ClipInternal:
+		return internalClipboard, nil
+	}
+	panic("How did execution get here?")
+}
+
+// ClipWrite sets the clipboard contents using the ClipCurrentMethod.
+func ClipWrite(content string) error {
+	switch ClipCurrentMethod {
+	case ClipExternal:
+		return clipboard.WriteAll(content, "clipboard")
+	case ClipInternal:
+		internalClipboard = content
+		return nil
+	}
+	panic("How did execution get here?")
+}