From c3cacb470430f3a19db8e2442f1ed61887044373 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Ekl=C3=B6f?= <daniel@ekloef.se>
Date: Wed, 9 Sep 2020 18:44:49 +0200
Subject: [PATCH] selection: add selection_<type>_unset()

These functions clear the current selection.
---
 selection.c | 41 +++++++++++++++++++++++++++++++++++++++++
 selection.h |  3 +++
 2 files changed, 44 insertions(+)

diff --git a/selection.c b/selection.c
index ed8d061b..b423fcca 100644
--- a/selection.c
+++ b/selection.c
@@ -661,6 +661,47 @@ selection_cancel(struct terminal *term)
     term->selection.ongoing = false;
 }
 
+void
+selection_clipboard_unset(struct seat *seat)
+{
+    struct wl_clipboard *clipboard = &seat->clipboard;
+
+    if (clipboard->data_source == NULL)
+        return;
+
+    /* Kill previous data source */
+    assert(clipboard->serial != 0);
+    wl_data_device_set_selection(seat->data_device, NULL, clipboard->serial);
+    wl_data_source_destroy(clipboard->data_source);
+
+    clipboard->data_source = NULL;
+    clipboard->serial = 0;
+
+    free(clipboard->text);
+    clipboard->text = NULL;
+}
+
+void
+selection_primary_unset(struct seat *seat)
+{
+    struct wl_primary *primary = &seat->primary;
+
+    if (primary->data_source == NULL)
+        return;
+
+    assert(primary->serial != 0);
+    zwp_primary_selection_device_v1_set_selection(
+        seat->primary_selection_device, NULL, primary->serial);
+    zwp_primary_selection_source_v1_destroy(primary->data_source);
+    free(primary->text);
+
+    primary->data_source = NULL;
+    primary->serial = 0;
+
+    free(primary->text);
+    primary->text = NULL;
+}
+
 void
 selection_mark_word(struct seat *seat, struct terminal *term, int col, int row,
                     bool spaces_only, uint32_t serial)
diff --git a/selection.h b/selection.h
index 639c36e9..178a990b 100644
--- a/selection.h
+++ b/selection.h
@@ -30,6 +30,9 @@ void selection_mark_word(
 void selection_mark_row(
     struct seat *seat, struct terminal *term, int row, uint32_t serial);
 
+void selection_clipboard_unset(struct seat *seat);
+void selection_primary_unset(struct seat *seat);
+
 char *selection_to_text(const struct terminal *term);
 void selection_to_clipboard(
     struct seat *seat, struct terminal *term, uint32_t serial);