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fix: truncating chapter titles using UTF-8 safe function (#599)

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## Summary

* Truncating chapter titles using utf8 safe functions (Cyrillic titles
were split mid codepoint)
* refactoring of lib/Utf8

---

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This commit is contained in:
Arthur Tazhitdinov
2026-02-01 16:23:48 +05:00
committed by GitHub
parent 0d82b03981
commit b1dcb7733b
8 changed files with 45 additions and 40 deletions
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18
lib/GfxRenderer/GfxRenderer.cpp
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@@ -415,13 +415,21 @@ void GfxRenderer::displayBuffer(const HalDisplay::RefreshMode refreshMode) const
std::string GfxRenderer::truncatedText(const int fontId, const char* text, const int maxWidth,
const EpdFontFamily::Style style) const {
if (!text || maxWidth <= 0) return "";
std::string item = text;
int itemWidth = getTextWidth(fontId, item.c_str(), style);
while (itemWidth > maxWidth && item.length() > 8) {
item.replace(item.length() - 5, 5, "...");
itemWidth = getTextWidth(fontId, item.c_str(), style);
const char* ellipsis = "...";
int textWidth = getTextWidth(fontId, item.c_str(), style);
if (textWidth <= maxWidth) {
// Text fits, return as is
return item;
}
return item;
while (!item.empty() && getTextWidth(fontId, (item + ellipsis).c_str(), style) >= maxWidth) {
utf8RemoveLastChar(item);
}
return item.empty() ? ellipsis : item + ellipsis;
}
// Note: Internal driver treats screen in command orientation; this library exposes a logical orientation