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perf(send): poll the clipboard for the paste hint only when it helps

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The send tab read the OS clipboard every frame the paste button was
hovered, to preview a pasted address. SDL's clipboard read is a
synchronous round-trip that can stall, and the preview can only ever
latch when the recipient field is empty, so most of those reads were
wasted work.

- The clipboard is now read only while the button is hovered and the
  recipient field is empty, polled once on hover entry and then at most
  twice a second.
- Trimming the clipboard text moves to a shared helper that also bounds
  the copy so a pathological multi-megabyte clipboard is ignored.

Tests: the trim helper handles null, surrounding whitespace, an
all-whitespace string, and the length bound.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
DanS
2026-10-13 16:00:10 -05:00
co-authored by Claude Opus 4.8
parent 3f82af99c4
commit 76daf9619d
4 changed files with 37 additions and 15 deletions
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tests/test_phase4.cpp
+6
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@@ -18121,6 +18121,12 @@ void testContactsTextHelpers() {
for (float maxW = -1; maxW < 700; maxW += 13.0f)
EXPECT_EQ(dragonx::util::truncateMiddleToFit(s, 5, 5, maxW, meas), oldFit(s, 5, 5, maxW));
}
EXPECT_EQ(dragonx::util::trimmedClipboardText(nullptr), std::string());
EXPECT_EQ(dragonx::util::trimmedClipboardText(" zs1abc\n"), std::string("zs1abc"));
EXPECT_EQ(dragonx::util::trimmedClipboardText("\t\r\n "), std::string());
EXPECT_EQ(dragonx::util::trimmedClipboardText(std::string(2000, 'a').c_str()), std::string());
EXPECT_EQ(dragonx::util::trimmedClipboardText(std::string(1024, 'a').c_str()).size(), (size_t)1024);
}
} // namespace