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Fix garbled translated command palette switch labels - #6410

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JMK712 wants to merge 1 commit into
sumatrapdfreader:masterfrom
JMK712:fix/palette-switch-utf8
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JMK712 wants to merge 1 commit into
sumatrapdfreader:masterfrom
JMK712:fix/palette-switch-utf8

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@JMK712

@JMK712 JMK712 commented Oct 23, 2026

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The Simplified Chinese translation of & Thumbnails is 缩略图, without the & prefix. Both palette renderers take the first byte as a keycap and skip two bytes for the label, splitting the first UTF-8 character and displaying replacement characters (� / �略图).

Use the actual mode prefix for keycaps and a shared helper that strips a prefix only when present. Apply this to the original and ng palettes. Add 10 regression cases covering Chinese labels with and without prefixes, English, trailing access-key text, and empty/short labels.

Validation: compiled and ran the extracted C++ helper, repository string-trimming functions, and new regression cases in an isolated WebAssembly harness: 10/10 pass; the old two-byte slicing fails 6/10. clang-format and git diff --check pass. Full application build, integrated unit-test runner, and GUI verification were not run because this machine lacks the Visual Studio C++ toolchain.

Use the mode prefix for keycaps and only strip it from translated labels
when present. This preserves Chinese thumbnail labels without a prefix.

prompt: 这里乱码了,尝试修复
@JMK712

JMK712 commented Oct 23, 2026

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ps: i love this pdf reader so much! Especially for big pdfs.I am sorry to use gpt for this pr, but hope it can locate and (probable) fix the problem correctly.

-ur sincerely K.C

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