Correctly compute the mapping between text and normalized text when it contains a compound word on two lines

test/pdfs/.gitignore

@@ -682,3 +682,4 @@
 !bug1922766.pdf
 !issue18956.pdf
 !issue19083.pdf
+!issue19120.pdf

test/unit/pdf_find_controller_spec.js

@@ -1062,23 +1062,45 @@ describe("pdf_find_controller", function () {
     await testOnFind({ eventBus });
   });
 
-  it("performs a search in a text with compound word on two lines", async function () {
+  it("performs a search in a text with a compound word on two lines", async function () {
     const { eventBus, pdfFindController } =
       await initPdfFindController("issue18693.pdf");
 
+    const query = "hel-Lo";
     await testSearch({
       eventBus,
       pdfFindController,
       state: {
-        query: "hel-Lo",
+        query,
       },
       matchesPerPage: [1],
       selectedMatch: {
         pageIndex: 0,
         matchIndex: 0,
       },
       pageMatches: [[6]],
-      pageMatchesLength: [[7]],
+      pageMatchesLength: [[query.length]],
+    });
+  });
+
+  it("performs a search after a compound word on two lines", async function () {
+    const { eventBus, pdfFindController } =
+      await initPdfFindController("issue19120.pdf");
+
+    const query = "a";
+    await testSearch({
+      eventBus,
+      pdfFindController,
+      state: {
+        query,
+      },
+      matchesPerPage: [3],
+      selectedMatch: {
+        pageIndex: 0,
+        matchIndex: 0,
+      },
+      pageMatches: [[0, 4, 15]],
+      pageMatchesLength: [[query.length, query.length, query.length]],
     });
   });
 

web/pdf_find_controller.js

@@ -282,8 +282,7 @@ function normalize(text) {
 
       if (p5) {
         // Compound word with a line break after the hyphen.
-        positions.push([i - shift + 3, 1 + shift]);
-        shift += 1;
+        // Since the \n isn't in the original text, o = 3 and n = 3.
         shiftOrigin += 1;
         eol += 1;
         return p5.replace("\n", "");