Reorganize docs and update reader search flows

2026-06-10 08:22:07 +08:00
parent 0e7c0577e3
commit d15187b730
72 changed files with 517 additions and 5214 deletions
@@ -81,4 +81,51 @@ final class RDEPUBTextSearchEngine: RDEPUBSearchEngine {
        let range = NSRange(location: start, length: max(end - start, 0))
        return text.substring(with: range).trimmingCharacters(in: .whitespacesAndNewlines)
    }
+
+    /// 无 publication 时的搜索（用于 txt 等外部文本文件）
+    static func searchWithoutPublication(textBook: RDEPUBTextBook, keyword: String) -> [RDEPUBSearchMatch] {
+        let normalizedKeyword = keyword.trimmingCharacters(in: .whitespacesAndNewlines)
+        guard !normalizedKeyword.isEmpty else { return [] }
+
+        var matches: [RDEPUBSearchMatch] = []
+        for chapter in textBook.chapters {
+            let source = chapter.attributedContent.string as NSString
+            let fullLength = source.length
+            guard fullLength > 0 else { continue }
+
+            var localMatchIndex = 0
+            var searchRange = NSRange(location: 0, length: fullLength)
+
+            while searchRange.length > 0 {
+                let foundRange = source.range(of: normalizedKeyword, options: [.caseInsensitive], range: searchRange)
+                guard foundRange.location != NSNotFound else { break }
+
+                let progressionDenominator = max(fullLength - 1, 1)
+                let progression = Double(foundRange.location) / Double(progressionDenominator)
+                let previewRadius = 12
+                let previewStart = max(foundRange.location - previewRadius, 0)
+                let previewEnd = min(foundRange.location + foundRange.length + previewRadius, fullLength)
+                let previewRange = NSRange(location: previewStart, length: max(previewEnd - previewStart, 0))
+                let previewText = source.substring(with: previewRange).trimmingCharacters(in: .whitespacesAndNewlines)
+
+                matches.append(
+                    RDEPUBSearchMatch(
+                        href: chapter.href,
+                        progression: progression,
+                        previewText: previewText,
+                        localMatchIndex: localMatchIndex,
+                        rangeLocation: foundRange.location,
+                        rangeLength: foundRange.length,
+                        rangeAnchor: nil
+                    )
+                )
+
+                localMatchIndex += 1
+                let nextLocation = foundRange.location + max(foundRange.length, 1)
+                if nextLocation >= fullLength { break }
+                searchRange = NSRange(location: nextLocation, length: fullLength - nextLocation)
+            }
+        }
+        return matches
+    }
 }