search: add {clipboard,primary}-paste key bindings

These bindings copy from the clipboard or primary selection into the
search buffer.

Default bindings:

* clipboard-paste: ctrl+v, ctrl+y
* primary-paste: shift+insert

CHANGELOG.md

@@ -47,6 +47,10 @@
   font is used (https://codeberg.org/dnkl/foot/issues/169).
 * Drag & drop support; text, files and URLs can now be dropped in a
   foot terminal window (https://codeberg.org/dnkl/foot/issues/175).
+* **clipboard-paste** and **primary-paste** scrollback search
+  bindings. By default, they are bound to `ctrl+v ctrl+y` and
+  `shift+insert` respectively, and lets you paste from the clipboard
+  or primary selection into the search buffer.
 
 
 ### Changed

README.md

@@ -162,6 +162,12 @@ These are the default shortcuts. See `man foot.ini` and the example
 : Same as <kbd>ctrl</kbd>+<kbd>w</kbd>, except that the only word
   separating characters are whitespace characters.
 
+<kbd>ctrl</kbd>+<kbd>v</kbd>
+: Paste from clipboard into the search buffer.
+
+<kbd>shift</kbd>+<kbd>insert</kbd>
+: Paste from primary selection into the search buffer.
+
 <kbd>escape</kbd>, <kbd>ctrl</kbd>+<kbd>g</kbd>
 : Cancel the search
 

config.c

@@ -108,6 +108,8 @@ static const char *const search_binding_action_map[] = {
     [BIND_ACTION_SEARCH_DELETE_NEXT_WORD] = "delete-next-word",
     [BIND_ACTION_SEARCH_EXTEND_WORD] = "extend-to-word-boundary",
     [BIND_ACTION_SEARCH_EXTEND_WORD_WS] = "extend-to-next-whitespace",
+    [BIND_ACTION_SEARCH_CLIPBOARD_PASTE] = "clipboard-paste",
+    [BIND_ACTION_SEARCH_PRIMARY_PASTE] = "primary-paste",
 };
 
 static_assert(ALEN(search_binding_action_map) == BIND_ACTION_SEARCH_COUNT,
@@ -1840,6 +1842,7 @@ add_default_search_bindings(struct config *conf)
     const struct config_key_modifiers none = {0};
     const struct config_key_modifiers alt = {.alt = true};
     const struct config_key_modifiers ctrl = {.ctrl = true};
+    const struct config_key_modifiers shift = {.shift = true};
     const struct config_key_modifiers ctrl_shift = {.ctrl = true, .shift = true};
 
     add_binding(BIND_ACTION_SEARCH_CANCEL, ctrl, XKB_KEY_g);
@@ -1867,6 +1870,9 @@ add_default_search_bindings(struct config *conf)
     add_binding(BIND_ACTION_SEARCH_DELETE_NEXT_WORD, alt, XKB_KEY_d);
     add_binding(BIND_ACTION_SEARCH_EXTEND_WORD, ctrl, XKB_KEY_w);
     add_binding(BIND_ACTION_SEARCH_EXTEND_WORD_WS, ctrl_shift, XKB_KEY_W);
+    add_binding(BIND_ACTION_SEARCH_CLIPBOARD_PASTE, ctrl, XKB_KEY_v);
+    add_binding(BIND_ACTION_SEARCH_CLIPBOARD_PASTE, ctrl, XKB_KEY_y);
+    add_binding(BIND_ACTION_SEARCH_PRIMARY_PASTE, shift, XKB_KEY_Insert);
 
 #undef add_binding
 }

doc/foot.1.scd

@@ -186,6 +186,12 @@ Note that these are just the defaults; they can be changed in
 	Same as *ctrl*+*w*, except that the only word separating
 	characters are whitespace characters.
 
+*ctrl*+*v*, *ctrl*+*y*
+	Paste from clipboard into the searh buffer.
+
+*shift*+*insert*
+	Paste from primary selection into the search buffer.
+
 *escape*, *ctrl*+*g*
 	Cancel the search
 

doc/foot.ini.5.scd

@@ -452,6 +452,13 @@ scrollback search mode. The syntax is exactly the same as the regular
 	Extend the current selection to the next whitespace. Default:
 	_Control+Shift+W_.
 
+*clipboard-paste*
+	Paste from the _clipboard_ into the search buffer. Default:
+	_Control+v Control+y_.
+
+*primary-paste*
+	Paste from the _primary selection_ into the search
+	buffer. Default: _Shift+Insert_.
 
 # SECTION: mouse-bindings
 

foot.ini

@@ -102,6 +102,8 @@
 # delete-next-word=Mod1+d Control+Delete
 # extend-to-word-boundary=Control+w
 # extend-to-next-whitespace=Control+Shift+W
+# clipboard-paste=Control+v Control+y
+# primary-paste=Shift+Insert
 
 [mouse-bindings]
 # primary-paste=BTN_MIDDLE

search.c

@@ -332,6 +332,35 @@ search_find_next(struct terminal *term)
 #undef ROW_DEC
 }
 
+static void
+add_chars(struct terminal *term, const char *src, size_t count)
+{
+    mbstate_t ps = {0};
+    size_t wchars = mbsnrtowcs(NULL, &src, count, 0, &ps);
+
+    if (wchars == -1) {
+        LOG_ERRNO("failed to convert %.*s to wchars", (int)count, src);
+        return;
+    }
+
+    if (!search_ensure_size(term, term->search.len + wchars))
+        return;
+
+    assert(term->search.len + wchars < term->search.sz);
+
+    memmove(&term->search.buf[term->search.cursor + wchars],
+            &term->search.buf[term->search.cursor],
+            (term->search.len - term->search.cursor) * sizeof(wchar_t));
+
+    memset(&ps, 0, sizeof(ps));
+    mbsnrtowcs(&term->search.buf[term->search.cursor], &src, count,
+               wchars, &ps);
+
+    term->search.len += wchars;
+    term->search.cursor += wchars;
+    term->search.buf[term->search.len] = L'\0';
+}
+
 static void
 search_match_to_end_of_word(struct terminal *term, bool spaces_only)
 {
@@ -461,6 +490,23 @@ distance_prev_word(const struct terminal *term)
     return term->search.cursor - cursor;
 }
 
+static void
+from_clipboard_cb(char *text, size_t size, void *user)
+{
+    struct terminal *term = user;
+    add_chars(term, text, size);
+}
+
+static void
+from_clipboard_done(void *user)
+{
+    struct terminal *term = user;
+
+    LOG_DBG("search: buffer: %ls", term->search.buf);
+    search_find_next(term);
+    render_refresh_search(term);
+}
+
 static bool
 execute_binding(struct seat *seat, struct terminal *term,
                 enum bind_action_search action, uint32_t serial)
@@ -609,6 +655,16 @@ execute_binding(struct seat *seat, struct terminal *term,
         search_match_to_end_of_word(term, true);
         return false;
 
+    case BIND_ACTION_SEARCH_CLIPBOARD_PASTE:
+        text_from_clipboard(
+            seat, term, &from_clipboard_cb, &from_clipboard_done, term);
+        return false;
+
+    case BIND_ACTION_SEARCH_PRIMARY_PASTE:
+        text_from_primary(
+            seat, term, &from_clipboard_cb, &from_clipboard_done, term);
+        return false;
+
     case BIND_ACTION_SEARCH_COUNT:
         assert(false);
         return false;
@@ -666,31 +722,7 @@ search_input(struct seat *seat, struct terminal *term, uint32_t key,
     if (count == 0)
         return;
 
-    const char *src = (const char *)buf;
-    mbstate_t ps = {0};
-    size_t wchars = mbsnrtowcs(NULL, &src, count, 0, &ps);
-
-    if (wchars == -1) {
-        LOG_ERRNO("failed to convert %.*s to wchars", count, buf);
-        return;
-    }
-
-    if (!search_ensure_size(term, term->search.len + wchars))
-        return;
-
-    assert(term->search.len + wchars < term->search.sz);
-
-    memmove(&term->search.buf[term->search.cursor + wchars],
-            &term->search.buf[term->search.cursor],
-            (term->search.len - term->search.cursor) * sizeof(wchar_t));
-
-    memset(&ps, 0, sizeof(ps));
-    mbsnrtowcs(&term->search.buf[term->search.cursor], &src, count,
-               wchars, &ps);
-
-    term->search.len += wchars;
-    term->search.cursor += wchars;
-    term->search.buf[term->search.len] = L'\0';
+    add_chars(term, (const char *)buf, count);
 
 update_search:
     LOG_DBG("search: buffer: %ls", term->search.buf);

wayland.h

@@ -93,6 +93,8 @@ enum bind_action_search {
     BIND_ACTION_SEARCH_DELETE_NEXT_WORD,
     BIND_ACTION_SEARCH_EXTEND_WORD,
     BIND_ACTION_SEARCH_EXTEND_WORD_WS,
+    BIND_ACTION_SEARCH_CLIPBOARD_PASTE,
+    BIND_ACTION_SEARCH_PRIMARY_PASTE,
     BIND_ACTION_SEARCH_COUNT,
 };