pax/booru-viewer
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Cache page results — prev/next loads instantly from memory

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Each page's results cached per search session. Going back to a
previous page loads from cache instead of re-fetching. Cache
cleared on new search.
This commit is contained in:
pax 2026-04-05 13:25:32 -05:00
parent 5bfc086931
commit 63292aa9ba
1 changed files with 13 additions and 3 deletions
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14
booru_viewer/gui/app.py
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@ -536,19 +536,26 @@ class BooruApp(QMainWindow):
def _on_search(self, tags: str) -> None:
self._current_tags = tags
self._current_page = 1
self._shown_post_ids = set() # track shown posts across pages
self._shown_post_ids = set()
self._page_cache = {} # page_num -> list[Post]
self._min_score = self._score_spin.value()
self._do_search()
def _prev_page(self) -> None:
if self._current_page > 1:
self._current_page -= 1
if self._current_page in self._page_cache:
self._signals.search_done.emit(self._page_cache[self._current_page])
else:
self._do_search()
def _next_page(self) -> None:
if self._loading:
return
self._current_page += 1
if self._current_page in getattr(self, '_page_cache', {}):
self._signals.search_done.emit(self._page_cache[self._current_page])
return
self._do_search()
def _on_nav_past_end(self) -> None:
@ -677,10 +684,13 @@ class BooruApp(QMainWindow):
def _on_search_done(self, posts: list) -> None:
self._posts = posts
# Track shown post IDs to avoid duplicates on next/prev page
# Cache page results and track shown IDs
if not hasattr(self, '_shown_post_ids'):
self._shown_post_ids = set()
if not hasattr(self, '_page_cache'):
self._page_cache = {}
self._shown_post_ids.update(p.id for p in posts)
self._page_cache[self._current_page] = posts
self._status.showMessage(f"{len(posts)} results")
thumbs = self._grid.set_posts(len(posts))
self._grid.scroll_to_top()