Initial project import

tools/v/vlib/clipboard/dummy/dummy_clipboard.v

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+module dummy
+
+// Clipboard represents a system clipboard.
+//
+// System "copy" and "paste" actions utilize the clipboard for temporary storage.
+@[heap]
+pub struct Clipboard {
+mut:
+	text     string // text data sent or received
+	got_text bool   // used to confirm that we have got the text
+	is_owner bool   // to save selection owner state
+}
+
+// new_clipboard returns a new `Clipboard` instance allocated on the heap.
+// The `Clipboard` resources can be released with `free()`
+pub fn new_clipboard() &Clipboard {
+	return &Clipboard{}
+}
+
+// new_primary returns a new X11 `PRIMARY` type `Clipboard` instance allocated on the heap.
+// Please note: new_primary only works on X11 based systems.
+pub fn new_primary() &Clipboard {
+	return &Clipboard{}
+}
+
+// set_text transfers `text` to the system clipboard.
+// This is often associated with a *copy* action (`Ctrl` + `C`).
+pub fn (mut cb Clipboard) set_text(text string) bool {
+	cb.text = text
+	cb.is_owner = true
+	cb.got_text = true
+	return true
+}
+
+// get_text retrieves the contents of the system clipboard.
+// This is often associated with a *paste* action (`Ctrl` + `V`).
+pub fn (mut cb Clipboard) get_text() string {
+	return cb.text
+}
+
+// clear empties the clipboard contents.
+pub fn (mut cb Clipboard) clear() {
+	cb.text = ''
+	cb.is_owner = false
+}
+
+// free releases all memory associated with the clipboard instance.
+pub fn (mut cb Clipboard) free() {
+}
+
+// has_ownership returns true if the contents of the clipboard were created by this clipboard instance.
+pub fn (cb &Clipboard) has_ownership() bool {
+	return cb.is_owner
+}
+
+// check_availability returns true if the clipboard is ready to be used.
+pub fn (cb &Clipboard) check_availability() bool {
+	// This is a dummy clipboard implementation,
+	// which can be always used, although it does not do much...
+	return true
+}