listing: restore full-segment search load (find every match)

Revert the "search only the loaded portion" shortcut from f5aaf50 and go back to
a single, guarded background load_all before matching, so a search finds every
occurrence in the segment (not just whatever streamed in so far). The guard
(_search_loading + queued callbacks) shares ONE load across per-keystroke
updates instead of spawning/cancelling a worker each keypress.

The wedge that shortcut was meant to avoid turned out to be unrelated to the
search load: it is a pre-existing navigation bug (opening a function right after
scrolling to the bottom of another leaves the listing cursor out of range and
'/' fails to focus the search input, so typed chars leak into the view as
listing verbs, one of which is 'u'=undefine). Reproduces at 0c097f5, before any
of this work; tracked separately.

Verified in isolation: search 3.1s, matches found; search/mouse/func_banners/
listing_view/continuous_view/decomp_nav/follow_xrefs 45/0.

1 files changed, 29 insertions, 5 deletions

diff --git a/idatui/app.py b/idatui/app.py
index 7ca7da6..3fa6515 100644
--- a/idatui/app.py
+++ b/idatui/app.py
@@ -987,6 +987,8 @@ class ListingView(SearchMixin, NavMixin, ColumnCursor, ScrollView, can_focus=Tru
         self._ranges: dict[int, list[tuple[int, int]]] = {}
         self._op_mode = 1       # opcode column: 0=off, 1=limited, 2=full ('o' cycles)
         self._op_w = 0          # char width of the hex-bytes field (excl. gap)
+        self._search_loading = False
+        self._search_pending: list = []  # done-callbacks awaiting the load
 
     # -- text helpers ------------------------------------------------------ #
     def _head(self, idx: int) -> Head | None:
@@ -1130,11 +1132,33 @@ class ListingView(SearchMixin, NavMixin, ColumnCursor, ScrollView, can_focus=Tru
         return self._line_plain(i)
 
     def _search_ensure(self, done) -> None:
-        # Search the currently-loaded portion; the background grower streams the
-        # rest of the segment in on its own (a blocking full load_all here would
-        # stall/thrash on a big segment). Unloaded lines read back as None from
-        # _search_line_text and are skipped until they arrive.
-        done()
+        # Search needs the whole segment loaded to find every match. Kick off a
+        # SINGLE background load (guarded so per-keystroke updates don't spawn
+        # one worker each — an exclusive worker would cancel+restart on every
+        # keypress and never finish) and queue the callbacks until it lands.
+        model = self.model
+        if model is None or model.complete:
+            done()
+            return
+        self._search_pending.append(done)
+        if not self._search_loading:
+            self._search_loading = True
+            self._search_load_all()
+
+    @work(thread=True, group="listing-search-load")
+    def _search_load_all(self) -> None:
+        model = self.model
+        if model is not None:
+            model.load_all()
+        self.app.call_from_thread(self._search_loaded)
+
+    def _search_loaded(self) -> None:
+        self._search_loading = False
+        if self.model is not None:
+            self._grew(len(self.model))
+        pending, self._search_pending = self._search_pending, []
+        for cb in pending:
+            cb()
 
     # -- rendering --------------------------------------------------------- #
     def render_line(self, y: int) -> Strip: