更新阅读器功能与示例

2026-07-27 21:43:13 +08:00
parent 68d9363f0a
commit 9392027106
78 changed files with 8780 additions and 2084 deletions
@@ -0,0 +1,44 @@
+import Foundation
+
+enum RDAILocatorBuilder {
+    static func makeLocator(
+        document: RDAIDocumentDescriptor,
+        snapshot: RDAIResourceSnapshot,
+        range: RDAITextRange
+    ) -> RDAILocator? {
+        let matchingRuns = snapshot.locatorRuns.filter { $0.textRange.intersects(range) }
+        guard let first = matchingRuns.first else { return nil }
+        let anchor = mergedAnchor(matchingRuns) ?? first.anchor
+        return RDAILocator(
+            documentIdentifier: document.identifier,
+            resourceIdentifier: snapshot.descriptor.identifier,
+            textRange: range,
+            anchor: anchor,
+            sourceHash: snapshot.sourceHash
+        )
+    }
+
+    private static func mergedAnchor(_ runs: [RDAILocatorRun]) -> RDAIAnchor? {
+        guard !runs.isEmpty else { return nil }
+        let anchors = runs.compactMap { run -> RDAIPDFAnchor? in
+            if case .pdf(let anchor) = run.anchor { return anchor }
+            return nil
+        }
+        guard anchors.count == runs.count,
+              let first = anchors.first,
+              anchors.allSatisfy({ $0.pageIndex == first.pageIndex && $0.textSource == first.textSource }) else {
+            return nil
+        }
+        var rects: [RDAINormalizedRect] = []
+        for rect in anchors.flatMap(\.rects) where !rects.contains(rect) {
+            rects.append(rect)
+        }
+        let readingOrder = anchors.compactMap(\.readingOrder).min()
+        return .pdf(RDAIPDFAnchor(
+            pageIndex: first.pageIndex,
+            rects: rects,
+            textSource: first.textSource,
+            readingOrder: readingOrder
+        ))
+    }
+}