cottongin/crosspoint-reader-mod
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fix: Implement guide-based cover image fallback (#830)

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This partially fixes #769 but is dependent upon PR #827 being merged
along side this @daveallie. I removed my PNG conversion code after
finding out that PR was already created. Without this PR though that
book in #769 will still fail to load because of how it's stored in the
file

---------

Co-authored-by: Dave Allie <dave@daveallie.com>
This commit is contained in:
Justin Mitchell
2026-02-16 07:24:30 -05:00
committed by GitHub
parent 0bc6747483
commit 6702060960
3 changed files with 59 additions and 11 deletions
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21
lib/Epub/Epub/parsers/ContentOpfParser.cpp
View File

@@ -296,23 +296,22 @@ void XMLCALL ContentOpfParser::startElement(void* userData, const XML_Char* name
// parse the guide
if (self->state == IN_GUIDE && (strcmp(name, "reference") == 0 || strcmp(name, "opf:reference") == 0)) {
std::string type;
std::string textHref;
std::string guideHref;
for (int i = 0; atts[i]; i += 2) {
if (strcmp(atts[i], "type") == 0) {
type = atts[i + 1];
if (type == "text" || type == "start") {
continue;
} else {
LOG_DBG("COF", "Skipping non-text reference in guide: %s", type.c_str());
break;
}
} else if (strcmp(atts[i], "href") == 0) {
textHref = FsHelpers::normalisePath(self->baseContentPath + atts[i + 1]);
guideHref = FsHelpers::normalisePath(self->baseContentPath + atts[i + 1]);
}
}
if ((type == "text" || (type == "start" && !self->textReferenceHref.empty())) && (textHref.length() > 0)) {
LOG_DBG("COF", "Found %s reference in guide: %s.", type.c_str(), textHref.c_str());
self->textReferenceHref = textHref;
if (!guideHref.empty()) {
if (type == "text" || (type == "start" && !self->textReferenceHref.empty())) {
LOG_DBG("COF", "Found %s reference in guide: %s", type.c_str(), guideHref.c_str());
self->textReferenceHref = guideHref;
} else if ((type == "cover" || type == "cover-page") && self->guideCoverPageHref.empty()) {
LOG_DBG("COF", "Found cover reference in guide: %s", guideHref.c_str());
self->guideCoverPageHref = guideHref;
}
}
return;
}

1
lib/Epub/Epub/parsers/ContentOpfParser.h
View File

@@ -63,6 +63,7 @@ class ContentOpfParser final : public Print {
std::string tocNcxPath;
std::string tocNavPath; // EPUB 3 nav document path
std::string coverItemHref;
std::string guideCoverPageHref; // Guide reference with type="cover" or "cover-page" (points to XHTML wrapper)
std::string textReferenceHref;
std::vector<std::string> cssFiles; // CSS stylesheet paths